News: Signaler och system, Electrical Engineeringhttp://www.chalmers.se/sv/nyheterNews related to Chalmers University of TechnologyWed, 26 Jun 2019 07:59:18 +0200http://www.chalmers.se/sv/nyheterhttps://www.chalmers.se/en/departments/e2/news/Pages/New-data-transfer-model-saves-energy-on-the-internet.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/New-data-transfer-model-saves-energy-on-the-internet.aspxNew data transfer model saves energy on the internet<p><b>​The internet has arisen in the public debate as a climate hazard that causes carbon dioxide emissions as high as those originating from airplane travel. For five years, research at Chalmers has been underway to build models for energy-efficient data traffic. So far, the researchers have managed to reduce energy consumption to one tenth in specified areas.​</b></p>​​<span style="background-color:initial">We are streaming movies and music, saving our pictures in the cloud, and are constantly connected to all the opportunities that the internet offers. The use of a regular smartphone requires about as much electricity as a refrigerator. However, the charging of the mobile phone only accounts for a negligible part of that energy. The rest of the electricity is not being used at our homes, but in data centres which are housing the data stored in the cloud, and during the transportation of data through fiber-optic cables, sometimes being hundreds of kilometers long.</span><div><br /></div> <div><strong>An immense increase in data traffic</strong></div> <div>The amount of data transported via fiber-optic cables is increasing at an almost unimaginable rate. And so does the energy consumption from the data traffic. If nothing is done about the situation, within ten years, the internet alone will consume more electricity than is globally produced. </div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Ny%20modell%20för%20datatrafik%20sparar%20energi%20på%20internet/peter_andrekson_170112_250px.jpg" class="chalmersPosition-FloatRight" alt="Peter Andrekson" style="margin:5px" />“It is a great challenge for society, and for us as researchers, to solve the equation of how to meet the demand for data capacity and performance, while keeping costs at a reasonable level and minimizing environmental impact. Not least, it requires a completely new way of optimizing the technical systems, says Peter Andrekson, Professor of photonics at Chalmers, who over the past five years has been the leader of a large research project with the aim to build a future model for energy-efficient optical fiber communication.</div> <div><br /></div> <div>The intention of the project has been to locate the dominating energy consumers in the fiber-optic systems, and then to design and build a model that only uses one-tenth as much energy as the existing systems do. To succeed in this, a broad approach has been applied. Three different scientific perspectives have been joined together – optical hardware, electronic hardware and information theory, in order to perform coordination and transfer of data in the best possible way.</div> <div><br /></div> <div><strong>Many small energy thieves</strong></div> <div>Something that, at least to some extent, came as a surprise to the researchers was the fact that there are quite many small energy thieves with the potential of affecting the system – not a few large bottlenecks to tackle.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Ny%20modell%20för%20datatrafik%20sparar%20energi%20på%20internet/ErikAgrell_170608_250px.jpg" class="chalmersPosition-FloatLeft" alt="Erik Agrell" style="margin:5px" />“Examples of such energy thieves are the signal processors in the transmitters and receivers in the optical systems”, says Erik Agrell, Professor of communication systems, who in this project has been responsible for developing mathematical models for designing new, more efficient types of transmitter and receiver algorithms. “Higher data transfer rates are requiring transmitters and receivers with the ability to handle stronger signals. However, with the help of error correcting codes, the requirements on the optical hardware can be partially lowered. On the other hand, it also consumes more energy, because the error correcting electronic hardware also runs on electricity. This is a concrete example of the need to find a balance between performance, cost and energy consumption in order to choose the best solution in every individual case.”</div> <div><br /></div> <div>Within the framework of the project, chips containing error correcting code have been designed at Chalmers and then custom made in the USA. Thereafter, the chips have been tested to verify that the theoretical models and simulations of the power consumption are correct, also in practice.</div> <div><br /></div> <div><strong>Aims at reducing energy consumption to one tenth</strong></div> <div>The prerequisites for how to design the optimal system differ, among other things, depending on the distance that data is being transported. On one hand, the researchers have studied data communication over short distances, from 1 up to 500 meters, which occur, for example, in data centres and in network-based computation clusters. On the other hand, research has also been focused on larger optical systems, where traffic from many users simultaneously travel over distances up to hundreds of kilometers.</div> <div><br /></div> <div>The project aim, to reduce energy consumption to one tenth compared to the models used today, seemed in advance to be quite tough.</div> <div><br /></div> <div>&quot;Within defined areas, we are able to state – not without pride – that we have managed to reach the levels that we aimed for,&quot; says Peter Andrekson. “This applies not least to the power reduction thanks to the error correcting code. We have also received good feedback on the scientific results that we have presented. However, commercial companies are not particularly willing to contribute to this type of research. For competitive reasons, they keep their knowledge to themselves but on the other hand they don´t hesitate to apply the results from academia.”</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Ny%20modell%20för%20datatrafik%20sparar%20energi%20på%20internet/Erik-Agrell-1_500px.jpg" class="chalmersPosition-FloatLeft" alt="Cristian Bogdan Czegledi and Erik Agrell" style="margin:5px" /><em>Professor Erik Agrell (to the right) is discussing effects of polarization in fiber optical communication with the doctoral student Cristian Bogdan Czegledi. (Photo J-O Yxell)​</em><br /><br /><br /></div> <div><strong>Interdisciplinary approach</strong></div> <div>To present results that really optimize the system as a whole, and not just the constituent parts, the researchers have worked interdisciplinary across three research fields. In total, the project will result in five doctoral theses. The doctoral students have worked in pairs circulating across departmental borders – an approach that has been the basis for reaching research results in a broad perspective.</div> <div><br /></div> <div>“To be honest, the process of fully understanding each other's concepts within the project has been time-consuming. Even though we work within related fields of research, there are cultural differences between our specialist areas. Chalmers has a strength in the competence center <a href="/en/centres/force/Pages/default.aspx">FORCE​</a>, which coordinates research on fiber-optical communication”, says Peter Andrekson, who is also the director of this centre. ”We are now expanding, thanks to the move of the research group Optical Networks to Chalmers from KTH in Stockholm.”</div> <div><br /></div> <div><strong>Sustainable economizing of the internet</strong></div> <div>“To obtain an internet that is sustainable from a resource-based point of view, three different perspectives have to be applied, says Erik Agrell. Firstly, it is about developing and using communication technology that is energy efficient, and in this perspective we can contribute as researchers. Secondly, it is about raising awareness and creating incentives for every one of us as internet users not to be unnecessarily wasteful of data traffic. In this case, the individual person, as well as the society at large, and our politicians, have a shared responsibility to maintain sustainability. And lastly, it is important for the climate which energy sources are used in each country to produce the electricity – the less fossil fuels and the more renewables the better.</div> <div><br /></div> <div>“I am convinced that we are moving towards a paradigm shift”, he concludes. “In a not-too-distant future, data transfer and heavy calculations on the internet will be seen as resources to economize with, not as free and unlimited assets.”</div> <div><br /></div> <div><div><strong>More about the research</strong></div> <div>The research has been funded by the Knut and Alice Wallenberg Foundation during five years starting from 2014, with 33,9 MSEK.</div> <div><a href="https://research.chalmers.se/en/project/?id=5914" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Energy-efficient optical fibre communication</a></div> <div><br /></div> <div><strong>For more information, contact:</strong></div> <div><a href="/en/Staff/Pages/Peter-Andrekson.aspx">Peter Andrekson</a>, Professor of photonics, Department of Microtechnology and Nanoscience, Chalmers University of Technology, <a href="mailto:%20peter.andrekson@chalmers.se">peter.andrekson@chalmers.se</a></div> <div><a href="/en/staff/Pages/erik-agrell.aspx">Erik Agrell​</a>, Professor of communication systems, Department of Electrical Engineering, Chalmers University of Technology, <div style="display:inline !important"><a href="mailto:%20agrell@chalmers.se">agrell@chalmers.se</a></div></div> <div><br /></div> <div><div>Text: Yvonne Jonsson</div> <div>Photo: J-O Yxcell (photo at the top of the page), Henrik Sandsjö (portrait photo of Peter Andrekson) and Oscar Mattsson (portrait photo of Erik Agrell)</div></div> <div><br /></div> <a href="mailto:%20agrell@chalmers.se"></a><div><br /></div> <div><strong style="background-color:initial">Data traffic and storage on the internet – this is how it works</strong><br /></div> <div>The internet is largely made up of fiber-optic cables, which are built into our houses, buried in the ground and at the bottom of the sea. In these cables, light is passed through the bundles of optical fibers with cores of very clean glass or plastic. The diameter of the fibers can range from a few millimeters down to less than a strand of hair, and they can be very long. A transmitter sends coded light signals through the optical fibers using lasers or light emitting diodes. At the other end, a receiver obtains the light signals and translates them back into electrical pulses, which are then passed on to computers, TV sets or mobiles. When the fiber-optical system is extended over long distances, signal amplifiers between the transmitter and the receiver may also be needed.</div> <div>When we use internet-based cloud services, we get access to applications, data storage and server capacity via the internet instead of having to handle them locally. Our data is then stored in huge server halls. These data centers use electricity for data storage, but also for cooling the servers.</div></div> <div><br /></div>Wed, 26 Jun 2019 00:00:00 +0200https://www.chalmers.se/en/departments/e2/news/Pages/Wind-power-research-helps-the-industry-advancing-the-energy-transition.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/Wind-power-research-helps-the-industry-advancing-the-energy-transition.aspxWind power research advances the energy transition<p><b>​Since 2010, the Swedish Wind Power Technology Centre has gathered and developed knowledge in collaboration with industry, and now constitutes a national knowledge industry for wind power technology. The research centre recently entered into its third stage, now going towards larger projects in collaboration with multiple disciplines. Several of the research results have attracted interest outside Sweden, and the centre is now becoming a player on the international arena.</b></p><p>​Today, wind power is the energy source with the greatest potential in the transition towards green energy in Sweden. A national political goal dictates that all electricity production should come from 100 percent renewables by 2040. From today's 11 percent, wind power is estimated to make up at least 40 percent of the Swedish electricity production within a couple of decades, probably more. The Swedish Wind Power Technology Centre (SWPTC) unites theory and practice in a close collaboration between industry and academia. The common goal is to optimise the capacity of wind turbines and make production and operation more cost-effective.</p> <h2 class="chalmersElement-H2">New methods for lowering costs and prolonging life-span</h2> <p>Unforeseen down-time in production can incur high costs for wind power owners, not only because of faulty components that need replacing, but also because of reduced revenue due to no energy production.</p> <p><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Vindkraftsforskning%20rustar%20branschen%20för%20snabbare%20energiomställning/Sara_Fogelstrom_250x350px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:175px;height:245px" />“In the transition towards 100 percent renewable energy in Sweden, it is important that we can take care of our wind turbines, as they will count for a large part of the electricity supply in the future. An important contribution from SWPTC in promoting the wind energy expansion is to develop better maintenance methods and knowledge about prolonging the life-time of wind turbines”, says Sara Fogelström, who is the coordinator of the research centre.</p> <p>With data from the wind turbine, one can calculate the expected life-span of different components and, on that basis, provide an optimal maintenance schedule. It also means that you can schedule the maintenance to a time when there is little wind, when the wind turbine would have a low production anyway.</p> <p>“The methods developed within SWPTC advocate a so-called opportunistic maintenance, which means that the system proposes replacing of several components at once, as the service technician is on site. Problems can then be addressed before they become too costly and, also, you do not have to go out to the windfarm as often, Sara adds.</p> <h2 class="chalmersElement-H2">Several research disciplines in collaboration</h2> <p>Until now, the centre has been building up fundamental knowledge, through individual research projects, within each of the research disciplines needed to understand how a wind turbine works. For example, at Chalmers, researchers in fluid dynamics are looking at how wind turbines in the forests are affected by the surrounding terrain. Researchers in dynamics investigate how the mechanical drive train, and in particular the gearbox, works. In electric power engineering, research is being carried out on detection of electric faults in the generator and how windfarms can be better connected at sea. Furthermore, researchers in construction engineering are interested in how different loads (“forces”) affect the foundation of the wind power turbine. Mathematicians are also involved in calculating how to optimise the maintenance methods.</p> <p>One of the projects that endorses the entire spectrum of competences is a project about how individual wind turbines are affected under harsh operating conditions. In complex terrain, it is subjected to ever-changing winds, which results in greater mechanical stress on the gearbox than it would in flat terrain. This explains why maintenance costs are often much higher in Sweden, which has a hillier terrain, than Denmark, which is mostly flat. <img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Vindkraftsforskning%20rustar%20branschen%20för%20snabbare%20energiomställning/Vindfält_710x330px.jpg" alt="" style="margin:5px" /><br /><em>With a new calculation model, researchers can see exactly how the wind field of each individual wind turbine behaves in a wind farm. The image is a cfd simulation (Computational Fluid Dynamics simulation) created by Hamidreza Abedi, Chalmers.</em><br /><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Vindkraftsforskning%20rustar%20branschen%20för%20snabbare%20energiomställning/Ola_Carlson-2_250x350px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:175px;height:245px" /></p> <p>The loads that each individual wind turbine is subjected to can vary a lot within one single wind farm. Ola Carlson is a Professor at the Division of Electrical Power Engineering and the Director of SWPTC. He is leading the project, which is carried out in collaboration with several industrial partners.</p> <p>“We have developed a calculation model that takes many different parameters into account, which can calculate the accumulated load that an individual wind turbine is subjected to. This knowledge is needed for manufacturers to be able to adapt the design of wind turbines to different operating conditions”, says Ola.</p> <h2 class="chalmersElement-H2">An international player</h2> <p>The research results have received attention also outside Sweden. The centre is now participating in several international networks and organisations, such as the European Energy Research Alliance, the European Academy of Wind Energy and the international energy agency IEA.</p> <p>“It is an important strategic move. We have already received inquiries of collaboration in major EU projects. Besides being a collaborative platform, it is also a way of spotting trends in the field”, Sara concludes.</p> <h3 class="chalmersElement-H3">About Swedish Wind Power Technology Center (SWPTC)</h3> <p>The centre was established in 2010 and during the first two stages, 35 research projects were carried out in collaboration with 26 industrial partners and research institutes. Prior to the start of stage 3 in January 2019, the research had generated 38 published articles and eight doctoral theses. The research is financed by the Swedish Energy Agency, Region Västra Götaland (VGR), as well as the participating companies and academic parties.</p> <p><a href="/en/centres/SWPTC/Pages/default.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more on SWPTC's homepage www.swptc.se<br /></a></p> <p><strong>Contact</strong><a href="/en/staff/Pages/sara-fogelstrom.aspx"><br />Sara Fogelström</a>, coordinator of SWPTC, <a href="mailto:sara.fogelstrom@chalmers.se">sara.fogelstrom@chalmers.se</a><a href="/en/staff/Pages/ola-carlson.aspx"><br />Ola Carlson</a>, Director of SWPTC, <a href="mailto:ola.carlson@chalmers.se">ola.carlson@chalmers.se</a><br /> </p> <p><br /></p> <p>Text: Anna Wallin<br />Portrait photos: Oscar Mattsson<br /></p> Thu, 13 Jun 2019 12:00:00 +0200https://www.chalmers.se/en/departments/e2/news/Pages/Innovative-prosthetic-teamwork-rewarded.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/Innovative-prosthetic-teamwork-rewarded.aspxInnovative prosthetic teamwork rewarded<p><b>​The research team behind a new generation of bionic limbs has been awarded this year’s Henry Wallman prize in medical technology. In the winning trio is Max Ortiz Catalan from Chalmers University of Technology.​</b></p>​​<img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Nytänkande%20protessamarbete%20prisas/Upper-limb_400px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" /><span style="background-color:initial">The team, consisting of Rickard Brånemark, Max Ortiz Catalan and Kerstin Hagberg, has successfully developed a new type of prosthesis for patients with amputations. The new prosthesis is directly attached to the skeleton in the amputation stump with an abutment penetrating the skin. </span><div><br /><span style="background-color:initial"></span><div><div>Rickard Brånemark and Kerstin Hagberg have dedicated decades to clinically implement this superior method of mechanical attachment of a limb prosthesis to the body. Further collaborative work by Max Ortiz Catalan allowed to also connect the prosthesis to the users’ nervous system, so patients can control the artificial limb as their own biological extremity.</div> <div><br /></div> <div>In the justification of the prize, it is emphasized that the trio demonstrates how a good collaboration between representatives for different competences can combine basic research with surgery, medical engineering, and clinical work to create products and solutions that can benefit a large group of patients.</div> ​<img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Nytänkande%20protessamarbete%20prisas/Lower-limb_250px.jpg" alt="Lower-limb prosthesis" class="chalmersPosition-FloatRight" /></div> <div><div>As the team includes rehabilitation in their work, the real-life use of the innovative prosthetic solution is ensured. The latter is also strengthened by the formation of Integrum AB; a company that further develops and markets the results.</div> <div><br /></div> <div>”Collaborative work between different disciplines is often sought but hard to achieve. I feel honored to have the possibility to work with highly competent individuals of a variety of backgrounds, who are willing to go through the hurdles of multi-disciplinary collaborations for a greater good. Several people have contributed to the creation and implementation of this technology, and I’m very grateful for their efforts. We will continue developing this technology further to restore even more function and reduce disability,” says Max Ortiz Catalan.  </div> <div><br /></div> <div><strong>The awarded team 2019</strong></div> <div>Rickard Brånemark – MSc (Chalmers), PhD, MD orthopaedic surgeon</div> <div>Max Ortiz Catalan – PhD, biomedical engineer</div> <div>Kerstin Hagberg – PhD, physiotherapist</div> <div><br /></div> <div>The prize will be awarded at a ceremony this autumn. Date will be announced after the summer.</div> <div><br /></div> <div><br /></div> <div><strong style="background-color:initial">About the prize</strong><br /></div> <div>The Henry Wallman prize is an innovation prize in medical technology, awarded annually since 2018 to researchers or graduate students who, in close collaboration between expertise in technology and health care, successfully have transferred new knowledge from academia to practical medical care. The Foundation for Biomedical Engineering (Stiftelsen Medicin &amp; Teknik) at Chalmers is hosting the prize. </div> <div>Henry Wallman came to Chalmers in 1948 and was a pioneer in biomedical engineering research and development. An important part of Henry Wallman’s deed was his philosophy and vision around close collaboration between technical and medical expertise to achieve success.</div> <div><a href="http://www.medtechwest.se/collaboration-platforms/henry-wallman/" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />More about the Henry Wallman prize​</a></div> <div>​<br /></div> <div><strong>Contact</strong></div> <div><a href="/sv/personal/Sidor/max-jair-ortiz-catalan.aspx">Max Ortiz Catalan</a>, Associate Professor, Department of Electrical Engineering, Chalmers University of Technology, <a href="mailto:%20maxo@chalmers.se">maxo@chalmers.se​</a></div> <div>Dr. Max Ortiz Catalan is an Associate Professor at the Biomedical Signals and Systems research unit at Chalmers, and founder of the Biomechatronics and Neurorehabilitation Laboratory (@ChalmersBNL). His research focus on neural control of artificial limbs via osseointegrated implants. This involves bio-electric signals acquisition and processing, neural interfaces, machine learning, osseointegration, and neurostimulation. Max Ortiz Catalan is leading the development and clinical implementation of the <a href="/en/projects/Pages/Natural-control-of-artificial-limb.aspx">Osseointegrated Human-Machine Gateway​</a>.</div> <div><br /></div> </div></div>Wed, 12 Jun 2019 14:00:00 +0200https://www.chalmers.se/en/departments/e2/news/Pages/The-app-that-alarms-by-itself-at-a-motorbike-accident.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/The-app-that-alarms-by-itself-at-a-motorbike-accident.aspxThe app that alarms motorbike accidents by itself<p><b>​A new motorcycle accident alerting system is currently being tested on Swedish roads. Thanks to an algorithm developed at Chalmers University of Technology, information from the sensors in the motorcyclist’s mobile phone can be used to identify that an accident has occurred and automatically call for help via SOS Alarm.</b></p>​<span style="background-color:initial">Motorcyclists are exposed and unprotected in traffic compared to most road users. Every year, around 250 drivers are seriously injured in Sweden, according to statistics from the Swedish Transport Agency. The trend is increasing – in 2018, 47 motorcyclists was killed, which is the highest rating in ten years.</span><div><br /></div> <div>”If a single vehicle accident occurs and the driver ends up unconscious in the ditch, it may take a long time before anyone notices what has happened”, says Chalmers researcher Stefan Candefjord, being a biker himself, and also one of the originators of the algorithm that is now used by SOS Alarm in a pilot project.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Appen%20som%20själv%20larmar%20vid%20en%20mc-olycka/Stefan_och_BAS_500px.jpg" class="chalmersPosition-FloatLeft" alt="Stefan Candefjord and Bengt Arne Sjöqvist" style="margin:5px" /><em>T</em><em>he researchers Stefan Candefjord and Bengt Arne Sjöqvist have developed the algorithm that makes it possible to automatically trigger an alarm to SOS Alarm, via an app in the mobile phone, in the event of a motorcycle accident. The sensor alarm technology could also be used for other unprotected road users such as horse riders and all-terrain vehicle drivers.</em></div> <div><i><br /></i></div> <div><br /></div> <div><strong><br /></strong></div> <div><strong><br /></strong></div> <div><strong>Fast and safe help for unprotected road users</strong></div> <div>Stefan Candefjord and Bengt Arne Sjöqvist, who both do research at the department of Electrical Engineering, are active in the field of prehospital e-health/Digital Health. The research is about developing smart IT solutions as support for decisions, aiming at to provide the right care and prompt treatment, even before the patient is brought to hospital. In this case, it is important to rapidly detect that an accident has occurred to alert the right rescue resources and thus minimizing injuries and deaths.</div> <div><br /></div> <div>“Our starting point was to develop a function that is similar to eCall, which modern cars of today are equipped with, though instead directed to unprotected road users”, says Bengt Arne Sjöqvist. “The advantage of a mobile app is that it is considerably easier to distribute to the users than a specially designed hardware would be – since a smartphone already is present in almost every person's pocket.”</div> <div><br /></div> <div>Initially, the intended target group was single practitioners such as cyclists, horse riders and all-terrain vehicle drivers. In 2017, the researchers got in touch with a group of master’s students via Chalmers Ventures, who signed up for the idea. The company Detecht was founded with a focus on motorcycle drivers – a homogeneous target group with similar interests and a high safety awareness, that the app can satisfy.</div> <div><br /></div> <div>“The two of us and Detecht are complementing each other. They are knowledgeable in the field and are driving the business model, while we can concentrate on the actual research part of the project,” says Stefan, who also holds a seat in the company board and will continue to contribute to the development of the functions of the algorithm.</div> <div><br /></div> <div>For his part, Bengt Arne works within the framework of the &quot;Prehospital ICT Arena&quot;, with a related research project called TEAPaN (Traffic Event Assessment, Prioritizing and Notification). The purpose is to establish an IT structure that, in a coordinated way, is able to connect various eCall solutions – the motorcycle app being one of several examples – with the society's rescue resources so that they are prioritized correctly, and the effort is optimized based on what actually has happened.</div> <div><br /></div> <div>In addition to the safety aspect, the app also offers the users some social features such as sharing routes, pictures and statistics with other motorcyclists. This is something that hopefully makes the app even more interesting to use. In Sweden alone, there are more than 300 000 registered motorcycles, and internationally the interest is also very widespread – the market is considered to be substantial.</div> <div><br /></div> <div><strong>Being tested by SOS Alarm and 15 000 bikers</strong></div> <div>For three months, including May with a possibility of an extension, the app is tested in a pilot project at SOS Alarm.</div> <div><br /></div> <div>“SOS Alarm is usually being restrictive in integrating new functions into their system, so it is gratifying that they are welcoming this technology and want to evaluate how sensor-controlled alarms can aid in their work”, Bengt Arne says.</div> <div><br /></div> <div>Nor has it been difficult to recruit motorcycle drivers who want to take part in the test.</div> <div><br /></div> <div>“The test results for April show that the about 15 000 motorcyclists involved in the project altogether have driven 120 000 kilometers, corresponding to three laps around the globe. One single minor accident did occur. The crash was correctly detected, the alarm was triggered as planned, and the operator at SOS Alarm sent intended rescue units to the position of the accident”, Stefan says.</div> <div><br /></div> <div>“The number of false alarms has been low, only once was the alarm released unjustified. One possible reason is that the driver probably had the phone lying loosely during the ride, which may have affected the data that the app registered and therefore incorrectly was interpreted as if the motorcycle overturned at speed. We will analyze all such events to decide what further improvements in the algorithm that can be made.”</div> <div><br /></div> <div>In the future, functions based on artificial intelligence are planned to be integrated, which will enhance the motorcyclists’ experiences. For example, the app can then recommend roads, fika stops and driving routes based on previous choices and preferences of the driver.</div> <div><br /></div> <div>From a societal perspective, it is the possibility to save lives that is the crucial factor. The time that elapses from the occurrence of an accident until the victims get help can be directly decisive for the outcome. In addition to providing increased safety for the driver, the app is also giving reassurance for family and friends, who quickly can get a notice about an accident.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Appen%20som%20själv%20larmar%20vid%20en%20mc-olycka/5-Mockups-midle-min_750px.jpg" class="chalmersPosition-FloatLeft" alt="Features from mororcycle app" style="margin:5px" /><br /><br /><br /></div> <div><br /></div> <div><strong>This is how the app works</strong></div> <div>The mobile phone's built-in sensors record speed, g-force and rotation. The information from the run is analyzed using an algorithm that identifies driving behavior that indicates that the driver is no longer in control of the motorcycle. If the alarm is activated, the driver has 60 seconds to turn off the alarm, otherwise, an alarm message is automatically triggered, contacting SOS Alarm with information about the position. Then, the alarm operator first tries to establish contact with the driver over the phone. If the driver is in need of assistance, alternatively is not contactable, rescue units are alerted to the current location.</div> <div>Basically any smartphone can be used, the only requirement is that the driver downloads and activates the app &quot;Detecht – your motorcycle app&quot;. Anyone interested can participate as a test driver.</div> <div><br /></div> <div>Text: Yvonne Jonsson</div> <div>Photo: Detecht and Yvonne Jonsson (portrait photo)</div> <div><br /></div> <div><a href="https://www.detecht.se/" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more about Detecht – Automatic Crash Detection for Motorcyclists</a><br /></div> <div><br /></div> <div><a href="https://www.sosalarm.se/pilotprojekt-sensorlarm-mc/" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more on SOS Alarm´s webpage (in Swedish): Pilotprojekt för sensorlarm vid mc-olyckor​</a><br /></div> <div><br /></div> <div><br /></div> <div><div><strong>For more information please contact:</strong></div> <div><a href="/en/staff/Pages/stefan-candefjord.aspx">Stefan Candefjord</a>, Assistant Professor in the Biomedical electromagnetics research group, Department of Electrical Engineering, Chalmers University of Technology, <a href="mailto:%20stefan.candefjord@chalmers.se">stefan.candefjord@chalmers.se</a></div> <div><br /></div> <div><a href="/en/staff/Pages/bengt-arne-sjoqvist.aspx">Bengt Arne Sjöqvist,</a> Associate Professor and former Professor of Practice in the Biomedical signals and systems research group, <a href="mailto:%20bengt.arne.sjoqvist@chalmers.se">bengt.arne.sjoqvist@chalmers.se</a>, and Programme Manager for <a href="https://picta.lindholmen.se/en" target="_blank">Prehospital ICT Arena (PICTA) at Lindholmen Science Park​</a></div></div> <div><br /></div> Thu, 16 May 2019 12:30:00 +0200https://www.chalmers.se/en/departments/mc2/news/Pages/Four-students-awarded-for-best-masters-theses.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/Four-students-awarded-for-best-masters-theses.aspxFour students awarded for best master&#39;s theses<p><b>Martin Anderberg, Rikard Reinhagen, ​Lowisa Hanning and Frida Strömbeck​​ have been awarded the Microwave Road Scholarship for best master’s thesis 2018, in the area of antenna and microwave engineering.</b></p><div><span style="background-color:initial">Each winner gets an award of 10 000 SEK and a diploma. The winners got their diplomas at the Microwave Road event on Electromagnetic Simulation on 8 May, handed over to them by Johan Carlert, chairman of Microwave Road.</span><br /></div> <div><br /></div> <div>Microwave Road is a national cluster focusing on international technology and market development uniting industry, universities, research institutes and regional and national public authorities.</div> <div><br /></div> <div>Text and photo: Hans Hjelmgren</div> <h3 class="chalmersElement-H3">Read the winning theses (pdf) &gt;&gt;&gt;</h3> <div>Martin Anderberg, <a href="http://publications.lib.chalmers.se/records/fulltext/255903/255903.pdf">Design of a 183 GHz Subharmonic Mixer Using Membrane Integrated GaAs Schottky Diode Technology</a></div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial">Lowisa Hanning, <a href="http://publications.lib.chalmers.se/records/fulltext/255564/255564.pdf">Pulse Shaping of Radar Transmitters Compensation of Memory Effects through Digital Pre-distortion</a></span></div> <div><br /></div> <div>Rikard Reinhagen, <a href="http://publications.lib.chalmers.se/records/fulltext/255522/255522.pdf">The technical feasibility of providing passenger Wi-Fi with 60 GHz WiGig networks on board trains</a></div> <div><br /></div> <div>Frida Strömbeck, <a href="http://publications.lib.chalmers.se/records/fulltext/254956/254956.pdf">Energy Efficient High Data Rate RF-DAC based PAM Modulator – A MMIC solution using an InP-based DHBT-process at Millimeterwave Band</a></div>Tue, 14 May 2019 09:00:00 +0200https://www.chalmers.se/en/departments/e2/news/Pages/40-years-of-bone-conduction-hearing.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/40-years-of-bone-conduction-hearing.aspx40 years of bone conduction hearing<p><b>​About 40 years ago, Mona Andersson in Gothenburg got the chance to live a new hearing life. She became one of three patients who received a new kind of hearing aid, anchored via a skin penetrating titanium screw to the skull bone. This was the starting point for a unique collaboration between Chalmers and Sahlgrenska University Hospital.​​</b></p>​​<span style="background-color:initial">Today, nearly 300 000 people worldwide have been able to improve their quality of life thanks to the bone anchored hearing aid, BAHA. The main reason behind the success is the innovative technical solution, combined with the ability to unite research and entrepreneurship.</span><div><br /></div> <div>In connection to the anniversary, the 'BAHA pioneers' reunited – the patient Mona Andersson, the medical doctor Anders Tjellström and the engineer Bo Håkansson. Their collaboration started in the late 1970s, and they have many memories and stories to share about how the bone anchored hearing aid went from a prototype to a worldwide success.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Pionjärerna%20som%20öppnat%20en%20ny%20värld%20av%20ljud/Mona-och-Bo_400px.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" /><br /><em><br /></em></div> <div><em>Mona Andersson visiting Bo Håkansson's laboratory at Chalmers in the late 1970s. (Picture to the left, from Chalmers archives)</em></div> <div><em></em><i><br /></i><br /></div> <div><br /></div> <div>Bone anchored hearing aids are suitable for patients who have some form of mechanical hearing impairment in the outer or middle ear. The hearing aid utilizes the ability of bone to transmit vibrations in the body, thus creating an alternative path for the sound to travel to the inner ear, via bone instead of air.</div> <div><br /></div> <div>“Initially, there were a lot of people, both in academia and in industry, who were hesitant about the benefits of the technology and gave us the advice to devote ourselves to something else”, Bo Håkansson says. “However, we were convinced that the idea had a future, and eventually we succeeded in gaining acceptance for it.”</div> <div><br /></div> <div>It took almost 15 years before the healthcare system began to use hearing aids based on bone conduction attached to the done directly. Since then the Gothenburg region has become somewhat of a center for companies engaged in that kind of hearing products.</div> <div><br /></div> <div>The diagnosis of dizziness is another promising research area where the bone conduction technology also can be used. Bo Håkansson and his research colleagues at Chalmers have developed a new type of bone conduction transducer to make diagnoses more accurate in a way that is also more comfortable for the patient. Dizziness and problems related to the balance organs affect about half of all over 65 years.</div> <div>So, the development of bone conduction seems to have a bright future as well...</div> <div><br /></div> <div>Text: Yvonne Jonsson</div> <div><br /></div> <div><div><strong>For more information, please contact:</strong></div> <div><a href="/en/Staff/Pages/bo-hakansson.aspx">Bo Håkansson</a>, Professor in Biomedical Engineering at the Department of Electrical Engineering at Chalmers University of Technology, +46 31 772 18 07, <a href="mailto:%20boh@chalmers.se">boh@chalmers.se</a></div></div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Pionjärerna%20som%20öppnat%20en%20ny%20värld%20av%20ljud/BAHA_350px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /></div> <div><div><em>A titanium screw is anchored in the skull bone, transmitting sound vibrations to the inner ear. Illustration: Oticon Medical</em></div> <div><br /></div> <div><a href="/en/projects/Pages/BAHA.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more about BAHA​</a></div></div> <div><br /></div> <div><a href="/sv/institutioner/e2/nyheter/Sidor/Mot-pionjarerna-.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read an article about 'the BAHA pioneers' in Swedish​</a></div>Tue, 07 May 2019 14:00:00 +0200https://www.chalmers.se/en/departments/e2/news/Pages/Smarter-charging-is-key-to-electromobility.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/Smarter-charging-is-key-to-electromobility.aspxSmarter charging is key to electromobility<p><b>​For electric vehicles to be implemented on a large ​scale, smart solutions for charging are required. Currently, development of digital systems is under way that in real time will control and distribute the available power, depending on such factors as how much each driver is prepared to pay, and how fast the vehicle must be fully charged for the next trip.</b></p>​<img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Smartare%20laddning%20nyckeln%20till%20elektromobilitet/Lang_Tong2_300px.jpg" class="chalmersPosition-FloatLeft" alt="Lang Tong" style="margin:5px" /><span style="background-color:initial">During nine months, Chalmers University of Technology is reinforced by Professor Lang Tong from Cornell University, USA. As a guest professor, one of his tasks will be to contribute to Chalmers' research in the field of electric power engineering, primarily focusing on digitalization in large-scale infrastructure for the charging of electric vehicles.</span><div><br /></div> <div>“Being a researcher interested in electromobility, Chalmers is an attractive place to visit”, says Lang Tong. “The close relation to industry as well as Chalmers' often application-driven research on electrified vehicles are interesting to me. In return, I hope to be able to contribute with my knowledge of applying ideas from artificial intelligence and data science in power and energy systems.”</div> <div><br /></div> <div>Lang Tong was in 2018 awarded the prestigious Fulbright Distinguished Chair in Alternative Energy Technology. His visit to Chalmers is funded by the Fulbright Scholar Program, a bi-national organization promoting exchange between Sweden and the US with government funding from both nations.</div> <div><br /></div> <h5 class="chalmersElement-H5">Developing smart charging of electrified vehicles</h5> <div>He is currently engaged in a collaborative research project at the department of Electrical Engineering aiming at developing technology and software systems for smart charging of electrified vehicles.</div> <div><br /></div> <div>“In 12-14 years, the proportion of electric cars is forecasted to increase to about 10 percent of the vehicle fleet”, Lang Tong says. “The infrastructure for charging the vehicles must, by then, be upgraded to become sufficient and robust enough to handle the increasing demand. Otherwise the lack of infrastructure risks hampering the development.”</div> <div><br /></div> <div>What will happen if thousands of drivers in Gothenburg, when they get home from work in the evening, plug in their electric cars for charging at the same time?</div> <div><br /></div> <div>“Well, it won´t be possible to charge all those vehicles at the same time”, Lang Tong notes. “The local distribution network will get overloaded; the power demand will be too heavy.”</div> <div><br /></div> <div>Instead, the solution lies in applying digital systems that in real time control and distribute the available power depending on the demand. </div> <div><br /></div> <div>“To match supply and demand of energy the development of smart systems is required. The systems need to be so smart that they also can take into account such factors as how much each driver is prepared to pay, and how fast the vehicles must be fully charged for the next trip.”</div> <div><br /></div> <div>At times, when there is a high strain on the grid from prioritized electrical equipment, the charging of some vehicles could be planned to be conducted later. Or the stored energy in the batteries of the car could even be used as a reinforcement or backup to the grid.</div> <div><br /></div> <h5 class="chalmersElement-H5">The potential of digitalization</h5> <div>“I am very pleased with the help Lang Tong gives us to grasp the new possibilities and to develop the use of data science and artificial intelligence in our research and in our education of power engineers for the future,” says Jörgen Blennow, Head of division Electric Power Engineering. “Digitalization will emerge in more and more areas, and it is important for us to fully understand what that means in terms of reliability, controllability and optimization of power systems.”</div> <div><br /></div> <div>During his stay at Chalmers, Professor Lang Tong also will be giving courses on machine learning and artificial intelligence in power systems to doctoral students.</div> <div><br /></div> <h5 class="chalmersElement-H5">A sustainable approach to future power systems</h5> <div>“In Scandinavia, I experience that there are strong environmental concerns against the use of fossil fuels, which in turn support the development of more sustainable solutions for transportation, generation of electricity and heating”, Lang Tong says. “However, for the electrified transportation system to be expanded on a large scale, there is also a need for political long-term policies and incentives supporting electrification, along with the expansion of infrastructure for charging the vehicles.”</div> <div><br /></div> <div>“The current power system is going through a transformation”, he continues. “In my opinion, this development is driven by two technological areas that require the attention of the researchers of today. On one hand, there is the development of electromobility. On the other hand, there is the need of an expanded system for solar energy combined with batteries to store the energy. A new power system design will make it possible for people to produce their own energy, in a small scale at home, and to save surplus electricity for later.” </div> <div><br /></div> <div>If electricity does not necessarily need to be produced at the same time as it is consumed, to maintain the balance in the electrical grid, conditions are created for more producers to enter the system, while a higher share of renewable energy sources also can be introduced.</div> <div><br /></div> <h5 class="chalmersElement-H5">Visiting together</h5> <div>Professor Lang Tong and his wife, Professor Qing Zhao also from Cornell University, have accompanied each other to Sweden and Chalmers. Both are visiting professors at the department of Electrical Engineering, <a href="/en/departments/e2/news/Pages/A-Jubilee-Professor-that-unwinds-complexity.aspx">Qing Zhao being a Jubilee Professor of Chalmers 2019.​</a> </div> <div><br /></div> <div>“Indeed, this was a good opportunity for us both to come to Chalmers and Gothenburg. We like the city, not least we enjoy shopping fresh food in the local market.”</div> <div><br /></div> <div>Before Lang Tong leaves Sweden, he would like to visit some more parts of the country. Accompanied by family and friends, he took a trip to Lapland during the winter season to experience the climate and the culture up north.</div> <div><br /></div> <div><div>Text and photo: Yvonne Jonsson​</div></div> <div><br /></div> <div><div><span style="background-color:initial"><a href="https://www.cies.org/" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more about the Fulbright Scholar Progra</a>m</span><span style="background-color:initial">​</span><br /></div></div> <div><span style="background-color:initial"><br /></span></div> <div><strong>​</strong><span style="background-color:initial"><strong>For more information, please contact:</strong></span><br /></div> <div><a href="https://people.ece.cornell.edu/ltong/" target="_blank">Lang Tong</a>, guest professor from Cornell University, USA</div> <div><a href="/en/Staff/Pages/jorgen-blennow.aspx">Jörgen Blennow​</a>, head of division Electric Power Engineering, department of Electrical Engineering, Chalmers University of Technology<br /></div> ​Tue, 16 Apr 2019 07:30:00 +0200https://www.chalmers.se/en/departments/e2/news/Pages/New-director-for-Swedish-Electromobility-Centre.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/New-director-for-Swedish-Electromobility-Centre.aspxNew director for Swedish Electromobility Centre<p><b>​Linda Olofsson has been appointed new director of Swedish Electromobility Centre, the national Centre of Excellence for electric and hybrid vehicles and infrastructure.</b></p>​<span style="background-color:initial">“Electromobility is an important part of the transition to a fossil-free society. I look forward to contributing to the development of sustainable transport solutions through coordination of work between industry and academia&quot;, says Linda Olofsson, who will take up her new position on 29 April, initially focusing on the preparations for the centre'​s fourth phase.</span><div><br /></div> <div>“I am very pleased that we have succeeded in recruiting Linda Olofsson as director of Swedish Electromobility Center”, says Anders Karlström, Head of the Department Electrical Engineering at Chalmers University of Technology, where the national center has its organizational base. “With a solid foundation in engineering, her expertise will be valuable in the ongoing development of the centre. The fact that the open position attracted so many qualified applicants is also satisfying.”</div> <div><br /></div> <div>Linda Olofsson has previously been working at RISE, where she has held a position as group manager in the areas of product and production development, bid data, digital transformation and innovation management. Linda holds a PhD in engineering physics from Chalmers University of Technology 2003. She has a background from both start-up companies and several engagements within the RISE group, where she has held leading positions in research and development.</div> <div><br /></div> <div>“From my career within RISE, I have extensive experience in managing research and development activities”, says Linda Olofsson. “It has been a major part of my work to coordinate industrial partners and researchers to find mutual solutions to complex engineering challenges. As a person I have a positive attitude combined with a strong drive for making progress and an easiness to engage my surroundings. I believe that my professional experiences, together with my personal qualities, imply that I can contribute in a very constructive way to the development of Swedish Electromobility Center, and bring forth conditions for the necessary development of sustainable transports of the future.”</div> <div><br /></div> <div>Swedish Electromobility Centre unites Swedish e-mobility expertise and is a node for interaction between academia, industry and society. The centre is approaching the end of its third phase and is currently in the process of applying to the Swedish Energy Agency to enter a fourth phase in the summer of 2019.</div> <div><br /></div> <div>“The interest in electromobility and the demand for knowledge in this field is growing, as well in industry as in academia and in the society as a whole“, notes Anders Karlström. “The centre is well positioned to create synergies for its partners and to manage an increasing number of research projects.”</div> <div><br /></div> <div>“I would also like to thank Elna Holmberg, who has been the director of the centre since 2012”, says Anders Karlström. “She has in a very successful way promoted the development of Swedish Electromobility Centre. I wish Elna the best of luck in her new challenges.”</div> <div><br /></div> <div><div><a href="http://emobilitycentre.se/en/" target="_blank">More about Swedish Electromobility Centre</a></div> <div>Swedish Electromobility Centre was founded by the Swedish Energy Agency 2007 in partnership with Swedish automotive industry and academia. Partners are AB Volvo, Autoliv Development AB, BorgWarner Sweden AB, CEVT, Chalmers University of Technology, Swedish Energy Agency, KTH Royal Institute of Technology, Linköping University, Lund University, Mariestads kommun, RISE, Scania CV AB, Uppsala University, Vattenfall and Volvo Car Corporation.</div> <div><br /></div> <div><br /></div> <div>Text: Yvonne Jonsson<br />Photo: private</div></div>Thu, 07 Mar 2019 10:00:00 +0100https://www.chalmers.se/en/departments/e2/news/Pages/A-Jubilee-Professor-that-unwinds-complexity.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/A-Jubilee-Professor-that-unwinds-complexity.aspxA Jubilee Professor that unwinds complexity<p><b>​The difficulty often lies in simplicity. To Qing Zhao, Jubilee Professor at Chalmers, understanding of a research problem is crucial. Merely solving the problem is not sufficient for her – she strives for achieving understanding and thus finding the simple, and also the best, solution.​</b></p>​<span style="background-color:initial">Professor Qing Zhao from Cornell University, USA, is one of Chalmers´ four Jubilee Professors in 2019. The Department of Electrical Engineering is her host during the year-long visit. Her expertise will benefit Chalmers, as well as Volvo Cars and Ericsson, in a project run by Region Västra Götaland, with the purpose to study how machine learning can be used to increase road traffic safety (MoRE2020).</span><div> <div><br /></div> <div>“For me, it is really exciting to do research in cooperation with industry”, Qing Zhao says. “My work is theoretical in nature and focuses on fundamental research problems. Now I have the opportunity to take a step further and explore how theories and algorithms from my research can be applied to real-world problems. Chalmers is well-known for its close and fruitful relations with the industrial companies in the region, and I am glad to be involved in this.”</div> <div><br /></div> <div>Qing Zhao´s research interests include sequential decision theory, stochastic optimization, machine learning, and algorithmic theory with applications in infrastructure, communications, and social economic networks.</div> <div><br /></div> <div>A great deal of this will be of use in the MoRE2020 project ”Active Learning for event detection in large-scale information networks”. In short, the project aims at teaching a safety system in a vehicle, connected to the cloud, to detect rare events in the surrounding traffic environment as quickly and as reliably as possible. The challenge lies in the large number of hypotheses, the noisy observations, and the limited prior knowledge on the rare events.</div> <div><br /></div> <div>“Using data sharing, where information is extracted from massive data streams, a collective learning in large complex networks is being built up”, Qing Zhao explains.</div> <div><br /></div> <div>”Qing Zhao adds vital complementary knowledge to Chalmers and our department in the field of machine learning and reinforcement learning”, says Professor Tomas McKelvey, who is the leader of the signal processing research group. “We strive for expanding our research in that direction, and therefore I am pleased that we managed to enroll her for quite a long time, thanks to the jubilee professorship.”</div> <div><br /></div> <div><strong>Understanding fascinates her</strong></div> <div>A scientific problem that keeps fascinating her, and many more researchers over decades, is the so-called multi-armed bandit problem. It is a classic mathematical framework for online learning and sequential decision making under unknown models. The problem can be likened to gambling on a slot machine with multiple arms, where the player faces the dilemma of staying on a seemingly good arm (exploitation) versus trying out a less observed arm (exploration).  </div> <div><br /></div> <div>“The problem, first considered in 1933, fascinated the research community for many years, while the answer eluded them until early 1970s. Legend has it that the problem, formulated during World War Two, so sapped the energies and minds of Allied analysts that a suggestion was made to have the problem dropped over Germany as the ultimate instrument of intellectual sabotage”, Qing Zhao says with a smile. ”After the breakthrough in early 1970s, researchers continued to search for the simplest proof and understanding of the optimal solution, until an ingenious proof, expressible in a single paragraph of verbal reasoning, was given in 1992.” </div> <div><br /></div> <div>“I find this type of research, this pursuit of understanding, most inspiring. To me, it is not only about solving a problem, it is about really understanding a problem and finding the pieces that, as simple as possible, comprise the solution. The task is not complete until one understands the underlying causes. I like unwinding the complexity of a problem. I find it most satisfying when simple solutions emerge from a morass of complications.</div> <div><br /></div> <div>This was also one of Qing Zhao´s statements when she was an invited speaker at a well-attended seminar at Chalmers arranged by the network <a href="/en/departments/e2/network/wise/Pages/default.aspx">Women in science, WiSE​</a>. She also shared some advice for young female researchers who are in the beginning of their academic careers.</div> <div><br /></div> <div>“Play to your strengths rather than compensating for your weaknesses. If you are really good at something, let that be your focus. To establish yourself as a prominent researcher, you need to concentrate your effort rather than spreading too thin. Choose a topic, choose a research community, and generate results of critical mass.”</div> <div><br /></div> <div><strong>A tough start in life</strong></div> <div>No doubt, Qing Zhao is an eminent scientist with an impressive career record. Her start in life was however not very favourable. </div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Qing%20Zhao/WiSE_seminar_IMG_0615_300px.jpg" alt="WiSE seminar with Qing Zhao" class="chalmersPosition-FloatLeft" style="margin:5px" /><br /><br /><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div>“It could have been me”, that was the headline of the last slide from her WiSE seminar, showing young girls worn down with household chores in rural villages in China. </div> <div><br /></div> <div>A couple months old, Qing Zhao was brought by her aunt to a small village in northern China and grew up there. The village had no electricity or running water. Her aunt was illiterate, there were no books in her home, and the village school was very poor with a single teacher teaching all subjects to all kids of all ages in the village.</div> <div><br /></div> <div>“When I was seven I moved back to live with my parents, my older sister and younger brother”, Qing Zhao says. “At age seven, I was not able to count to ten. If I had stayed in the village, I probably would be living my life like those girls in the picture, without much education. Thinking back, now being a mother myself, I realise what a difference it makes to give children the right opportunities in life in terms of a nourishing environment, intellectual stimulation, education and encouragement. You never know what they will accomplish!”</div></div> <div><br /></div> <div>Text and photo: Yvonne Jonsson</div> <div><br /></div> <div><div><a href="http://zhao.ece.cornell.edu/" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />More about Qing Zhao, Cornell University</a></div> <div><a href="/en/research/our-scientists/Pages/Jubilee-Professors.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />More about Chalmers´ Jubilee Professors​</a></div> <div><br /></div> <div><strong>More about the research</strong></div> <div><a href="https://www.vgregion.se/regional-utveckling/program/more/" target="_blank">The Mobility for Regional Exellence 2020 programme (MoRE2020)</a> is a research mobility programme run by Region Västra Götaland and co-funded by the European Union. </div> <div>Qing Zhao is working on the project <a href="https://www.vgregion.se/regional-utveckling/program/more/results-from-more2020s-second-call-for-proposals/qing-zhao/" target="_blank">“Active Learning for event detection in large-scale information networks, MoRE2020”​</a>.</div> <div><br /></div> <div><strong>For further information, please contact</strong></div> <div>Qing Zhao, Professor at Cornell University, USA, and a Chalmers Jubilee Professor 2019, hosted by the Department of Electrical Engineering, Chalmers University of Technology</div> <div><a href="mailto:%20qing@chalmers.se">qing@chalmers.se</a></div> <div><br /></div> <div>Tomas McKelvey, Professor and Head of the Signal processing research group, Department of Electrical Engineering, Chalmers University of Technology</div> <div><a href="mailto:%20tomas.mckelvey@chalmers.se">tomas.mckelvey@chalmers.se</a></div> <div><br /></div></div>Tue, 12 Feb 2019 10:30:00 +0100https://www.chalmers.se/en/departments/e2/news/Pages/Putting-their-Masters-skills-to-the-test.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/Putting-their-Masters-skills-to-the-test.aspxPutting their Master&#39;s skills to the test<p><b>​The Design Project is an appreciated course among many Master’s students. The problem-solving skills of the soon-to-be engineers are put to the test, while they get a chance to apply their acquired knowledge from previous courses. The projects are based on real problems within ongoing research at Chalmers, often with a connection to industry and society.</b></p><p>​&quot;What has been fun with our design project has been to test our algorithms on a practical platform, even though it was a very simplified version of reality,&quot; says Ellinor Claesson.</p> <p>She is one of the students who accepted the engineering challenge with automated intersections. With the rapid development of self-driving vehicles, the automotive industry is facing the challenge of developing a system for a safe and efficient coordination of self-driving vehicles through an intersection.</p> <p>Every year, the Master's programme Systems, Control and Mechatronics offers a large selection of project proposals for the students to choose from. The projects are supervised by researchers from various areas within the Department of Electrical Engineering, which provides a great variety of engineering problems.</p> <p>Another of this year's approximately 30 projects was the &quot;Chalmers Postman Robot&quot;, where the task was to get the robot to pick up mail from the janitor's office and to autonomously take the lift up to the fifth floor, to deliver the letter to the supervisor's office. Equipped with a pre-recorded map and a LIDAR - a laser scanner that can measure distance, the robot can sense where it is on the map. It also has a camera that can detect so-called AprilTags, a kind of markers that are set up along with the planned route, that the robot reads to determine its position.</p> <p>“We had six weeks to complete the project. With ten people in the project group, it was a challenge to divide the work into smaller groups to collaborate effectively”, says Hannes Jubro Kool, one of the students behind the robotic postman.</p> <p>Petter Falkman is responsible for the design project course in systems, control and mechatronics. He thinks of the course as a good preparation for the upcoming Master’s thesis, as the students are get to practice on taking a project through all its phases, from specification to test and verification. He also plans to further develop the already popular course.</p> <p>“My hope is that in the future we will be able to tie even closer links with parties from industry and society. By inviting our partners outside Chalmers to come up with project proposals, and to supervise the students in collaboration with our researchers, we hope to get more reality-based challenges for our future engineers to work with. It is also a good way to show the industry what our students can do when they enter the labor market”, says Petter Falkman.</p> <p><br /></p> <p></p> <p><a href="http://www.chalmers.se/en/education/programmes/masters-info/Pages/Systems-control-and-mechatronics.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Learn more about the Master's programme in Systems, Control and Mechatronics<br /></a></p> <p><a href="http://www.chalmers.se/en/education/programmes/Pages/masters-programmes.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Learn more about Master's studies at Chalmers</a><a href="http://www.chalmers.se/en/education/programmes/Pages/masters-programmes.aspx"><span style="display:inline-block"></span></a></p>Tue, 12 Feb 2019 08:00:00 +0100https://www.chalmers.se/en/departments/e2/news/Pages/Hand-prosthesis-successfully-implanted.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/Hand-prosthesis-successfully-implanted.aspxFirst dexterous hand prosthesis implanted<p><b>​A female Swedish patient with hand amputation has become the first recipient of an osseo-neuromuscular implant to control a dexterous hand prosthesis. In a pioneering surgery, titanium implants were placed in the two forearm bones (radius and ulnar), from which electrodes to nerves and muscle were extended to extract signals to control a robotic hand and to provide tactile sensations. This makes it the first clinically viable, dexterous and sentient prosthetic hand usable in real life. The breakthrough is part of the European project DeTOP.</b></p>​<span style="background-color:initial">The new implant technology was developed in Sweden by a team lead by Dr. Max Ortiz Catalan at Integrum AB – the company behind the first bone-anchored limb prosthesis using osseointegration – and Chalmers University of Technology. This first-of-its-kind surgery, led by Prof. Rickard Brånemark and Dr. Paolo Sassu, took place at Sahlgrenska University Hospital as part of a larger project funded by the European Commission under Horizon 2020 called DeTOP. </span><div><br /></div> <div>The DeTOP project is coordinated by Prof. Christian Cipriani at the Scuola Superiore Sant’Anna, and also includes Prensilia, the University of Gothenburg, Lund University, University of Essex, the Swiss Center for Electronics and Microtechnology, INAIL Prosthetic Center, Università Campus Bio-Medico di Roma, and the Instituto Ortopedico Rizzoli.</div> <div><br /></div> <div><strong>Implanted electrodes provide sensory and motoric control</strong><br /></div> <div>Conventional prosthetic hands rely on electrodes placed over the skin to extract control signals from the underlying stump muscles. These superficial electrodes deliver limited and unreliable signals that only allow control of a couple of gross movements (opening and closing the hand). Richer and more reliable information can be obtained by implanting electrodes in all remaining muscle in the stump instead. Sixteen electrodes were implanted in this first patient in order to achieve more dexterous control of a novel prosthetic hand developed in Italy by the Scuola Superiore Sant’Anna and Prensilia. </div> <div><br /></div> <div>Current prosthetic hands have also limited sensory feedback. They do not provide tactile or kinesthetic sensation, so the user can only rely on vision while using the prosthesis. Users cannot tell how strongly an object is grasped, or even when contact has been made. By implanting electrodes in the nerves that used to be connected to the lost biological sensors of the hand, researchers can electrically stimulate these nerves in a similar manner as information conveyed by the biological hand. This results in the patient perceiving sensations originating in the new prosthetic hand, as it is equipped with sensors that drive the stimulation of the nerve to deliver such sensations.</div> <div><br /></div> <div><strong>Works in everyday life</strong></div> <div>One of the most important aspects of this work is that this is the first technology usable in daily life. This means it is not limited to a research laboratory. The Swedish group – Integrum AB and Chalmers University of Technology – have previously <a href="https://www.youtube.com/watch?v=7_lvVgth_ec&amp;feature=youtu.be" target="_blank">demonstrated that control of a sentient prosthesis in daily life was possible in above-elbow amputees using similar technology</a> (video). This was not possible in below-elbow amputees where there are two smaller bones rather than a single larger one as in the upper arm. This posed several challenges on the development of the implant system. On the other hand, it also presents an opportunity to achieve a more dexterous control of an artificial replacement. This is because many more muscles are available to extract neural commands in below-elbow amputations.</div> <div><br /></div> <div>Bones weaken if they are not used (loaded), as commonly happen after amputation. The patient is following a rehabilitation program to regain the strength in her forearm bones to be able to fully load the prosthetic hand. In parallel,<a href="https://www.youtube.com/watch?v=EES8U5LwaUs&amp;feature=youtu.be" target="_blank"> she is also relearning how to control her missing hand using virtual reality​</a> (video), and in few weeks, she will be using a prosthetic hand with increasing function and sensations in her daily life. Two more patients will be implanted with this new generation of prosthetic hands in the upcoming months, in Italy and Sweden.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Ny%20teori%20om%20fantomsmärtor%20visar%20vägen%20mot%20effektivare%20behandling/max_ortiz_catalan_250px.jpg" class="chalmersPosition-FloatLeft" alt="Max Ortiz Catalan, foto: Oscar Mattsson" style="margin:5px;width:180px;height:212px" />“Several advanced prosthetic technologies have been reported in the last decade, but unfortunately they have remained as research concepts used only for short periods of time in controlled environments” says Dr. Ortiz Catalan, Assoc. Prof. at Chalmers University of the Technology and head of the Biomechatronics and Neurorehabilitation Lab (@ChalmersBNL)​, who has led this development since its beginning 10 years ago, initially in above-elbow amputations. “The breakthrough of our technology consists on enabling patients to use implanted neuromuscular interfaces to control their prosthesis while perceiving sensations where it matters for them, in their daily life.”</div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial"><strong>Extensive </strong></span><span style="background-color:initial"><strong>Swedish participation in international project</strong></span></div> <div><span style="background-color:initial">The contribution to this European project in Sweden is extensive. The way in which humans perceive touch, and how machines can replicate such feat, are addressed at the University of Gothenburg by Prof. Johan Wessberg’s group. On the other hand, the way in which humans produce motor control, and the algorithms that can replicate it, are studied by the group of Dr. Christian Antfolk at Lund University. The clinical follow-ups and further surgeries will be conducted at Sahlgrenska University Hospital by Dr. Paolo Sassu, in collaboration with Prof. Rickard Brånemark now at MIT in USA. The development of the osseo-neuromuscular technology as well as the integration with the Italian prosthesis along with all the other components will occurred in Sweden led by Dr. Ortiz Catalan at Chalmers University of Technology and Integrum AB.</span><br /></div> <div><br /></div> <div><a href="http://www.detop-project.eu/" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more about the DeTOP project</a></div> <div><a href="http://www.bnl.chalmers.se/wordpress/" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more about Biomechatronics and Neurorehabilitation Lab (@ChalmersBNL)​</a><span style="background-color:initial">,</span></div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Handprotes%20implanterad/Patient-and-Researcher_500px.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><div>The patient is instructed by Dr.Max Ortiz Catalan to produce movements as indicated in the virtual hand. Muscular electrical activity captured by the implanted electrodes is displayed in the screen. This information is learned by the artificial limb to then respond to the desired movements.</div> <div><span style="background-color:initial">Credits: Dr. Max Ortiz Catalan</span><span style="background-color:initial">​</span></div></div> <div><span style="background-color:initial"><br /></span></div> <div><div><span style="font-weight:700">See videos describing the project</span></div> <div><a href="https://www.youtube.com/watch?v=EES8U5LwaUs&amp;feature=youtu.be" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Patient video: Osseo-neuromuscular interface for below-elbow amputations</a></div> <div><a href="https://youtu.be/xf3try5tu-0" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Prosthetic hand video: Sensorized Hand Prosthesis​</a></div> <div><a href="https://youtu.be/6WQiJPexEDM" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />DeTOP project video​</a></div> <span style="background-color:initial"></span></div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial"><br /></span></div> <div><div><span style="font-weight:700;background-color:initial">For more information, please contact:</span><br /></div> <div>Dr. Max Ortiz Catalan, +46 70 8461065, <a href="mailto:%20maxo@chalmers.se">maxo@chalmers.se​</a></div> <span style="background-color:initial"></span></div>Tue, 05 Feb 2019 09:00:00 +0100https://www.chalmers.se/en/departments/e2/news/Pages/Smoother-movements-reduce-power-peaks.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/Smoother-movements-reduce-power-peaks.aspxSmoother movements reduce power peaks<p><b>​By programming industrial robots to operate more smoothly, and thus avoiding heavy accelerations and decelerations, energy consumption as well as power peaks can be significantly reduced. Based on these results, researchers are now taking a step further to investigate how other production equipment containing moving devices can be optimized.</b></p>​D<span style="background-color:initial">esigning optimal processes, while considering energy and environmental aspects, is becoming an increasingly important concern for the manufacturing industry. In the long run, it provides a competitive edge in terms of reduced production costs and a stronger sustainability profile.</span><div><br /></div> <div>Since several years, the research group Automation at Chalmers University of Technology has collaborated with the automotive industry to reduce energy consumption in robotic systems used in manufacturing processes. The industrial robots are energy-intensive. For example, in automotive bodywork factories the robots' consumption amounts to about half of the total energy used in production.<img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Mjukare%20rörelser%20kapar%20effekttoppar/Bengt-Lennartsson_250px.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" /><br /><br /></div> <div><div><strong>Lower energy demand and no production loss</strong></div> <div>”Our results show that the energy consumption can be reduced by 20-25 percent when industrial robots operate with smoother movements and avoid unnecessary starts and stops”, says Bengt Lennartson, Professor of Automation at the Department of Electrical Engineering. “And this without reducing the pace of production.”</div> <div><br /></div> <div>The reduction is even greater when it comes to the robots´ power demands – the power peaks can be decreased by as much as 60 percent. As the powerconsuming accelerations are greatly reduced, in favour of a more balanced mode of driving, not as large momentary power demands occur. This also has a positive impact on the life-span of the components.</div> <div><br /></div> <div>“The power demand being reduced to such high extent is a positive side effect of the energy saving we initially intended to achieve. So far, the power balance in the Swedish energy system has been good, but in the future, if the country is facing a situation where power shortage may occur, it will be expensive for industries whose electricity consumption is characterized by high power peaks.”</div> <div><br /></div> <div><strong>Bringing the method forward</strong></div> <div>“Our method for optimizing the robots has proved to be both simple and efficient,” says Bengt Lennartson. “The optimization never changes the robot’s operation path, only the speed and sequence. We collect data from the real robot and process it in an optimization program. The result is improved control instructions that are directly fed back to the robot.”</div> <div><br /></div> <div>The research group has now started to apply their method in other fields of engineering as well, where there are moving and energy-intensive systems. This could include automated guided vehicles, conveyor systems and numerically controlled machining tools.</div> <div><br /></div> <div><strong>The production system of the future</strong></div> <div>The research on energy efficiency conducted by the Automation research group is a good example of computer-driven optimization methods. This type of optimization, combined with artificial intelligence, AI, is about to make its entry into industrial production to form what is known as Intelligent Manufacturing. It is about smart machines and connected manufacturing systems that interact and communicate with each other.</div> <div><br /></div> <div>“Not least in China, there is a great interest in intelligent and sustainable production systems,” says Bengt Lennartson, who recently has participated as invited speaker in several research conferences on this topic. “Sweden is often mentioned as a good example of how sustainable and energy efficient manufacturing systems can be designed, and I agree that it really is our strength.</div></div> <div><br /></div> <div>Text: Yvonne Jonsson</div> <div>Photo: Malin Ulfvarson and Oscar Mattsson</div> <div><br /></div> <div><div><strong>More about the research</strong></div> <div><a href="/en/departments/e2/news/Pages/Smooth-robot-movements-reduce-energy.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Smooth robot movements reduce energy consumption by up to 40 percent</a></div> <div><a href="/en/projects/Pages/Automation-and-Robotics-for-EUropean-Sustainabile-manufacturing.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Automation and Robotics for EUropean Sustainabile manufacturing (AREUS</a>)</div> <div><a href="/en/projects/Pages/Sustainable-motions---SmoothIT.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Sustainable motions, SmoothIT</a></div> <div><a href="/en/projects/Pages/ITEA3Q-Smart-Prognos-av-EnergianvQndning-med-resursfQrdelningQ.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Smart prognos av energianvändning med resursfördelning, SPEAR​</a></div> <div><br /></div> <div><strong>For more information, please contact:</strong></div> <div>Bengt Lennartson, Professor of Automation, Head of Division System and Control, Department of Electrical Engineering, Chalmers University of Technology, Sweden</div> <div>+46 31-772 37 22,<a href="mailto:%20bengt.lennartson@chalmers.se"> bengt.lennartson@chalmers.se</a></div></div> <div><img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Mjukare%20rörelser%20kapar%20effekttoppar/Energy-robot_power_consumption_500px.jpg" class="chalmersPosition-FloatLeft" alt="Power consumption industrial robot" style="margin:5px" /><br /><br /><br /></div> <div><span style="background-color:initial">​</span><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><br /></div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial">Reducing power peaks through minimizing accelerations in the robot movements.</span><span style="background-color:initial">​</span><br /></div>Thu, 24 Jan 2019 07:00:00 +0100https://www.chalmers.se/en/departments/e2/news/Pages/Testbed-creates-ripple-effect-for-energy-research-.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/Testbed-creates-ripple-effect-for-energy-research-.aspxTestbed creates ripple effect for energy research<p><b>​For researchers to have access to a real arena where they can put their theories to test is invaluable. David Steen at Chalmers University of Technology finds that being involved in the project FED - Fossil-free Energy Districts, where the university campus is used as the testbed for a local energy market for heating, cooling and electricity, has opened new doors.</b></p>​<span style="background-color:initial">“FED has become a springboard for our research group to look more into integrated energy systems and the demonstration arena we are building will also be used in future research projects. We have already gotten two other projects granted, where the campus of Chalmers will also act as a testbed,” says David Steen, researcher at the Department of Electrical Engineering at Chalmers University of Technology.</span><div><br /></div> <div>In addition to funding substantial investments, such as solar panels and various types of energy storages, the FED-project has connected the energy management systems of the buildings to a cloud-based marketplace. This allows the separate buildings, acting as energy consumers, producers and storages, to trade heating, cooling and electricity with each other based on what is most effective from both an economical and environmental perspective.</div> <div><br /></div> <div>“One of the challenges with renewable energy is that it is not always produced when you need it the most. The local energy market we are developing in FED is one way to provide customers and users with incentives to shift their consumption in time, in order to use locally produced energy more efficiently.”</div> <div><br /></div> <div>David Steen and his colleagues have contributed to the project by creating a simulation model of the campus area in order to measure the energy flows of heating, cooling and electricity. What makes FED unique is that three different energy carriers are connected into one common system.</div> <div><br /></div> <div>“We are trying to take advantage of the flexibility of, for example, the heating system to help the electrical system, and vice versa. As far as I know, no one else has done this by using a local energy market before.”</div> <div><br /></div> <div>The FED project ends in 2019, but the campus testbed will remain open to researchers and companies to test the new energy solutions needed in the transition towards a sustainable society. In two EU-funded projects, the researchers at Chalmers will examine advanced solutions for the future distribution system (<a href="https://united-grid.eu/" target="_blank">United Grid</a>) and how different micro-grids can interact in order to facilitate the use of renewable energy production (<a href="https://m2m-grid.eu/" target="_blank">From Micro to Mega - GRID</a>). Two additional FED partners, Göteborg Energi and RISE, are also included in these projects.</div> <div><br /></div> <div>“It is very unique to have access to this kind of testbed and to be able to test solutions in close cooperation with industry,&quot; says David Steen. “It has helped us a lot and I do not think we would have received these two projects if we had not had the FED-project and the test arena here.”</div> <div><br /></div> <div><div><strong>Contact</strong></div> <div><a href="/en/Staff/Pages/david-steen.aspx">David Steen</a>, researcher at the Department of Electrical Engineering at Chalmers University of Technology</div> <div><a href="mailto:%20david.steen@chalmers.se">david.steen@chalmers.se </a></div> <div>Claes Sommansson, Project Coordinator FED, Johanneberg Science Park</div> <div><a href="mailto:%20claes.sommansson@johannebergsciencepark.com">claes.sommansson@johannebergsciencepark.com</a> </div> <div><br /></div> <div>Text, film and photo: Johanneberg Science Park​<br /></div> <div><br /></div> <div><strong>About the project </strong></div> <div>The Fossil-free Energy Districts project, FED, is an innovative effort by the City of Gothenburg to decrease the use of energy and the dependence on fossil fuel in​ a built environment. A unique local marketplace for electricity, district heating and cooling is being developed together with eight strong partners. </div> <div><br /></div> <div>The City of Gothenburg, Johanneberg Sciene Park, Göteborg Energi, Business Region Göteborg, Ericsson, RISE Research Institutes of Sweden, Akademiska Hus, Chalmersfastigheter and Chalmers University of Technology are all contributing with their expertise and knowledge to make FED attractive for other European cities as well.</div> <div><br /></div> <div>During 2017−2019 the FED testbed will be situated on Chalmers Campus Johanneberg. FED is co-financed by the European Regional and Development Fund through the Urban Innovative Actions Initiative, an initiative of the European Commission for cities to test new solutions for urban challenges. </div> <div><div><a href="/en/departments/e2/news/Pages/Unique-energy-system-is-being-tested-at-Chalmers.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" /><span style="background-color:initial">Unique energy system is being tested at Chalmers</span>​</a><br /></div></div> <div><br /></div> <div>Follow FED on Twitter: <a href="https://twitter.com/fedgbg" target="_blank">https://twitter.com/fedgbg</a><br /></div> <div><br /></div></div> <div><a href="https://www.uia-initiative.eu/en/uia-cities/gothenburg" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more about FED and UIA, Urban Innovative Actions​</a></div> <div><a href="https://www.johannebergsciencepark.com/en/projects/fed-fossil-free-energy-districts" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more about FED on www.johannebergsciencepark.com​</a></div> <div><br /></div>Tue, 08 Jan 2019 00:00:00 +0100https://www.chalmers.se/en/departments/e2/news/Pages/Artificial-joint-restores-wrist-like-movements-to-forearm-amputees-.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/Artificial-joint-restores-wrist-like-movements-to-forearm-amputees-.aspxArtificial joint restores wrist-like movements<p><b>​A new artificial joint restores important wrist-like movements to forearm amputees, something which could dramatically improve their quality of life. A group of researchers led by Max Ortiz Catalan, Associate Professor at Chalmers University of Technology, Sweden, have published their research in the journal IEEE Transactions on Neural Systems &amp; Rehabilitation Engineering.​</b></p>​<span style="background-color:initial">For patients missing a hand, one of the biggest challenges to regaining a high level of function is the inability to rotate one’s wrist, or to ‘pronate’ and ‘supinate’. When you lay your hand flat on a table, palm down, it is fully pronated. Turn your wrist 180 degrees, so the hand is palm up, and it is fully supinated. </span><div><span style="background-color:initial"><br /></span><div>Most of us probably take it for granted, but this is an essential movement that we use every day. Consider using a door handle, a screwdriver, a knob on a cooker, or simply turning over a piece of paper. For those missing their hand, these are much more awkward and uncomfortable tasks, and current prosthetic technologies offer only limited relief to this problem. </div> <div><img class="chalmersPosition-FloatRight" alt="Max Ortiz Catalan" src="/SiteCollectionImages/Institutioner/E2/Nyheter/Ny%20teori%20om%20fantomsmärtor%20visar%20vägen%20mot%20effektivare%20behandling/max_ortiz_catalan_250px.jpg" style="margin:5px;vertical-align:middle" /><br /> <span style="background-color:initial">“A person with forearm amputation can use a motorised wrist rotator controlled by electric signals from the remaining muscles. However, those same signals are also used to control the prosthetic hand,” explains Max Ortiz Catalan, Associate Professor at the Department for Electrical Engineering at Chalmers. “This results in a very cumbersome and unnatural control scheme, in which patients can only activate either the prosthetic wrist or the hand at one time and have to switch back and forth. Furthermore, patients get no sensory feedback, so they have no sensation of the hand’s position or movement.” </span></div> <div><span style="background-color:initial"><br /></span></div> <div>The new artificial joint works instead with an osseointegrated implant system developed by the Sweden-based company, Integrum AB – one of the partners in this project. An implant is placed into each of the two bones of the forearm – the ulnar and radius – and then a wrist-like artificial joint acts as an interface between these two implants and the prosthetic hand. Together, this allows for much more naturalistic movements, with intuitive natural control and sensory feedback. </div> <div> </div> <div><img alt="A collection of images showing the new technology" src="/SiteCollectionImages/Institutioner/E2/Nyheter/Konstgjord%20led%20ger%20underarmsamputerade%20rörelseförmåga%20tillbaka%20i%20handleden/Kollage_konstgjord_led_750px.jpg" style="margin:5px;vertical-align:middle" /><br /><span style="background-color:initial">Patients who have lost their hand and wrist often still preserve enough musculature to allow them to rotate the radius over the ulnar – the crucial movement in wrist rotation. A conventional socket prosthesis, which is attached to the body by compressing the stump, locks the bones in place, preventing any potential wrist rotation, and thus wastes this useful movement. </span></div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial">“Depending on the level of amputation, you could still have most of the biological actuators and sensors left for wrist rotation. These allow you to feel, for example, when you are turning a key to start a car. You don’t look behind the wheel to see how far to turn – you just feel it. Our new innovation means you don’t have to sacrifice this useful movement because of a poor technological solution, such as a socket prosthesis. You can continue to do it in a natural way,” says Max Ortiz Catalan.</span></div> <div><div> </div> <div>Biomedical Engineers Irene Boni and Jason Millenaar were at Chalmers as visiting international students. They worked with Dr. Ortiz Catalan at his Biomechatronics and Neurorehabilitation Lab at Chalmers, and with Integrum AB on this project. </div> <div><br /></div> <div>“In tests designed to measure manual dexterity, we have shown that a patient fitted with our artificial joint scored far higher compared to when using conventional socket technology,” explains Jason Millenaar.</div> <div><br /> <span style="background-color:initial">“Our new device offers a much more natural range of movement, minimising the need for compensatory movements of the shoulder or torso, which could dramatically improve the day to day lives of many forearm amputees,” says Irene Boni. </span></div> <div> </div> <div>Dr. Marco Controzzi at the Biorobotics Institute, Sant'Anna School of Advanced Studies in Italy also participated in the research.</div> <div> </div> <div>Read the paper <a href="https://ieeexplore.ieee.org/document/8533434" target="_blank">‘Restoring Natural Forearm Rotation in Transradial Osseointegrated Amputees​</a>’ published in the journal IEEE Transactions on Neural Systems &amp; Rehabilitation Engineering.</div> <div> </div> <div><img class="chalmersPosition-FloatLeft" alt="A closeup of the implants and the artificial joint." src="/SiteCollectionImages/Institutioner/E2/Nyheter/Konstgjord%20led%20ger%20underarmsamputerade%20rörelseförmåga%20tillbaka%20i%20handleden/Konstgjord_led_hand_750px.jpg" style="margin:5px" /><br /><br /><br /></div> <div><strong><br /></strong> </div> <div><strong style="background-color:initial">More on the research</strong><br /></div> <div><span style="background-color:initial">Dr. Max Ortiz Catalan is an Associate Professor at Chalmers University of Technology, Sweden, and head of the Biomechatronics and Neurorehabilitation Laboratory (<a href="https://twitter.com/chalmersbnl">@ChalmersBNL​</a>)</span><strong><br /></strong></div> <div>Irene Boni was a visiting student from the Sant'Anna School of Advanced Studies in Italy, and Jason Millenaar from Delft University of Technology in the Netherlands.</div> <div> </div> <div>The researchers found that restoring the full range of movement to all degrees of freedom in which the forearm bones can move was not necessary – the key parameter for returning a naturalistic wrist motion is the ‘axial’, or circular, motion of the ulnar and radius bones.</div> <div> </div> <div>“The wrist is a rather complicated joint. Although it is possible to restore full freedom of movement in the ulnar and radial bones, this could result in discomfort for the patient at times. We found that axial rotation is the most important factor to allow for naturalistic wrist movement without this uncomfortable feeling,” explains Max Ortiz Catalan. </div> <div> </div> <div>The development was finalised within the Horizon 2020 framework programme for Research and Innovation under the DeTOP project. </div></div> <div> </div> <div><div><strong>For more information, contact:</strong><br /><span style="background-color:initial">Max Ortiz Catalan, Department of Electrical Engineering, Chalmers University of Technology, Sweden, <br />+46 70 846 10 65, <a href="mailto:%20maxo@chalmers.se">maxo@chalmers.se</a></span><br /></div></div> <div><br /></div> <div> </div> <div>Text: Joshua Worth</div> <div><span style="background-color:initial">Images: C</span><span style="background-color:initial">halmers Biomechanics and Neurorehabilitation Laboratory/Chalmers University of Technolog and Oscar Mattsson</span><br /></div></div> ​Wed, 28 Nov 2018 07:00:00 +0100https://www.chalmers.se/en/departments/mc2/news/Pages/Large-interest-for-solid-centre-day.aspxhttps://www.chalmers.se/en/departments/mc2/news/Pages/Large-interest-for-solid-centre-day.aspxLarge interest for solid centre day<p><b>​Intense networking and the latest research updates were on the agenda on the joint day for Chalmers excellence centres ChaseOn and GigaHertz Centre in Palmstedtsalen on 14 November. The day gathered around 140 participants from the academic and business worlds.</b></p><div><span style="background-color:initial"><img src="/SiteCollectionImages/Institutioner/MC2/News/centreday_strom_grahn_IMG_5724_350x305.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" />The centre directors </span><span style="background-color:initial">Erik Ström, Professor of Communications Systems at the Department of Electrical Engineering – E2, and </span><span style="background-color:initial">Jan Grahn, Professor of Microwave Technology at MC2 (to the left)</span><span style="background-color:initial">, invited to a full and intense day, together with their vice directors Christian Fager, Professor at MC2, and Marianna Ivashina, Professor of Electromagnetic Design of Antenna Systems at E2.</span></div> <div>&quot;With Chalmers and industry together in a consortium, doing this type of joint arrangement is unique in this perspective&quot;, Jan Grahn said in his and Erik Ström's joint welcome address.</div> <div><br /></div> <div>On the agenda there were technical presentations of ongoing research collaborations between Chalmers and the business community in microwave technology and antenna systems, currently nine projects, and plenty of opportunities to network and connect with new contacts. A new feature for this year was a poster exhibition with around ten participants. It drew much attention within the coffee breaks.</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/centreday_sheemstra_IMG_5810_350x305.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />Specially invited key note speaker was Sonia Heemstra, Professor at Eindhoven University of Technology in The Netherlands (to the right). <span style="background-color:initial">Two members of the International Scientific Advisory Board (ISAB) were also on site: Wolfgang Heinrich, Professor at The Ferdinand-Braun-Institut in Berlin, and Christoph Mecklenbräuker, Professor at TU Vienna.</span></div> <div><br /></div> <div>GigaHertz Centre and ChaseOn together gather 25 partners within academy and industry. That's a considerable share of the expertise in microwave electronics and antenna systems. Nine different projects are ongoing right now in the Vinnova funded effort, which also involves three departments at Chalmers.</div> <div> </div> <div><img src="/SiteCollectionImages/Institutioner/MC2/News/centreday_poster_b_IMG_5816_350x305.jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px" />Jan Grahn emphasized that there are strong technical reasons to unite the areas with a joint board and a joint scientific advisory board:</div> <div>&quot;We think that this have been highly beneficial by all standards and even internationally. As directors we feel that this joint consortium has worked extremely well, and we see that we get many new grants and new partners.&quot; </div> <div><br /></div> <div>Ström and Grahn also looked beyond the lifetime of the current setup:</div> <div>&quot;We are already discussing what will happen after this projects end in 2021&quot;, they said.</div> <div>A strategic group has been formed, with 15 members from Chalmers and eight partner companies. Ström and Grahn didn't reveal any details, but said that there is a large consensus to continue and develop the collaboration in the future.</div> <div><br /></div> <div>Among the participants at the Centre Day were people from companies such as Volvo Cars, Saab AB and Ericsson. It all ended with a gala dinner at the restaurant Wijkanders.</div> <div><br /></div> <div>Text and photo: Michael Nystås</div> <div><br /></div> <div><br /></div> <div><strong>Read more about GigaHertz Centre &gt;&gt;&gt;</strong></div> <div><a href="http://www.chalmers.se/ghz">www.chalmers.se/ghz</a></div> <div><br /></div> <div><strong>Read more about ChaseOn &gt;&gt;&gt;</strong></div> <div><a href="http://www.chalmers.se/chaseon">www.chalmers.se/chaseon</a></div>Fri, 23 Nov 2018 09:00:00 +0100