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11 6 February 2014 | year 56

Biweekly magazine of the Eindhoven University of Technology For the latest news: www.cursor.tue.nl/en and follow @TUeCursor_news on

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Physics in Gemini

Pretty TU/e gals and guys

Tuesday 4 February - On Thursday February 6th, the Department of Applied Physics (TN) will be opening a new laboratory in Gemini-Noord, home to Mechanical Engineering.

The Darcy Lab houses advanced X-ray and MRI devices of TN group Transport in Permeable Media. The group will be working with Energy Technology of Mechanical Engineering in an attempt to store heat in salt crystals. The Darcy Lab was names after French engineer henry Darcy (1803-1858). Those who wish to attend the opening can check in at the Gemini at 3.50PM.

Monday 3 February 2014 – “It goes against the ugly nerd image.” That’s how the founders of Facebook page ‘Parels van TUEindhoven’ (Gems of TUEindhoven) describe their initiative.

The website presents TU/e babes and hunks. The founders prefer to remain anonymous, but they claim to be ‘a large team of men and women’ from the Department of Industrial Engineering & Innovation Sciences. The idea of the Facebook page is that TU/e people send in a pretty picture of themselves or someone else. Although it’s mostly photos of students right now, PhD students and faculty are most welcome, too.

New microsu times as pre rgery robot is five cise as a hum Monday 3 Febr uary - Mechani an hand cal engineer Ra has developed imondo Cau a new robot

specially for m It enables surg icrosurgery. eons to operat e shaking-free greater precis with five times ion than by ha nd. Carrying ou operations plac t highly precis es such high de e mands on surg few are able to eons that do it successful ly. The robot w more surgeons ill enable to carry out hi ghly precise m sow waiting tim icrosurgery, es will be shor tened. It also physical burden reduces the on the surgeo n and will mak more precise op e new and erations possib le. Cau’s protot now be furthe ype will r developed to gether with th Hospital Maast e Academic richt, and the results of the tests are expe first clinical cted within th e next year. Als o see page 25 .

New production method for paper proves breakthrough Thursday 23 January - The production of paper will become much cheaper and significantly more eco-friendly. These high expectations were expressed by major paper-industry companies, after having seen an invention from prof.dr.ir. Maaike Kroon, professor of Separations Technology at the Department of Chemical Engineering & Chemistry. Kroon discovered how wood can be ‘dissected’ more energy-efficiently and eco-friendlier in the future, to extract cellulose, for example: the raw material for paper. The idea is that TU/e and fourteen European companies will set up a consortium, and build a test facility to extract cellulose according to Kroon’s method.

More news on www.cursor.tue.nl/en

Clmn

New signage on campus getting closer Friday 31 January - Within several weeks, pedestrians, cyclists, and drivers should be able to find their way around campus with ease. New signs will provide directions to buildings, and there will be signs at buildings as well. Cubes at the periphery of the terrain have to guide pedestrians and cyclists to campus. Buildings will all be fitted with a clearly visible number, which should be successive, meaning building, 1, 2, and 3 are close to each other. Parties involved will advise on the signage, and final decisions on the design will probably be made in February.

The signs in the buildings themselves will not change much for now.

Emiel Hensen receives Vivi grant for carrier material catalysis Monday 27 January - Prof.dr.ir. Emiel Hensen is to receive a 1.5-million-euro Vici Grant from research financer NWO. Hensen is Professor of Molecular Catalysis at the Department of Chemical Engineering, and will be researching reactions occurring on the interface between catalyst nanoparticles and the carrier material they’re attached to. He’ll be focusing on a number of uses, including separating water into hydrogen and oxygen using sunlight. This process is one of the primary candidates for becoming the world’s numberone sustainable source of energy. The Vici grant is the largest grant awarded by the NWO Innovation Research Incentives Scheme. It’s meant for excellent and authoritative researchers.

Elles Raaijmakers

Elles Raaijm akers, Electrical Elles alway Engineering studen t. s tries to se e the fu of things an d reproduc nny side es this in cartoons and comic s.

22 | Zoom in

6 February 2014

Cooperating re robots learn fr Text | Nicole Testerink Photos | Bart van Eijden Having robots cooperate through their own online platform in order to simplify and speed up actions: four years ago, TU/e, Philips, and four foreign universities of technology started an endeavor to reach that goal with a project funded by the European Committee. And now there’s RoboEarth, a Wikipedia of sorts for robots. The final demonstration in a hospital setting proves the success of the international collaboration. Cooperating researchers have made robots cooperate.

More and more tasks are carried out by robots, or will be soon. Think of care robot AMIGO that can support hospital staff, or do household chores. Today, this type of robot is programmed for each task separately still.

However, robots could be used much more efficiently if they were able to learn from each other, say René van de Molengraft, associate professor at the Department of Mechanical Engineering and director of robot soccer team Tech United, and his German researcher colleague Oliver Zweigle of the University of Stuttgart. Van de Molengraft: “If a personal robot is to become an everyday appliance like a personal computer, and we manage to teach it something it can share with other robots, it could have a major impact. We had to work with that idea.”

Their joint plan evolves into a grant proposal that is subsequently accepted by the European joint program FP7. RoboEarth is given the green light, with Van de Molengraft at the helm of the project. Although it may seem easy on paper to have robots share their knowledge, it still takes a large group of researchers four years to develop a system that can connect robots all over the globe.

Sharing knowledge is nothing new.

People do so through the Internet on a daily basis. Still, it’s new for robots. The way knowledge is represented has to be unambiguous, must be stored, and reinterpreted for a robot not to mess things up.

And then the robot has to act accordingly. A lot of research has gone into these separate components, but creating a new system that combines them is what makes RoboEarth a high-profile project.

The concept is shaped from several angles. “Each partner in the project has their own expertise that’s

essential to make the project work.

And with everyone approaching the issue from a different perspective, we can take larger steps”, says Zweigle, who’s working on knowledge storage with the Technical University of Munich.

Van de Molengraft’s group is working on knowledge representation, and researches how to model spaces. The latter is vital to secure objects, and have robots move in a room. The University of Zaragoza is an authority in the field of perception systems and mapping: how does a robot perceive things? The way robots learn is studied at ETH Zurich, where they’re also developing the RoboEarth Cloud Engine, which is used for calculating and interpreting information. The information comes from a database designed in Stuttgart in which everything is stored: knowledge for navigation, performing tasks, object recognition, and a number of software components. In a nutshell, the RoboEarth project involves the creation of a loop from robot to said database, allowing robots to reuse knowledge and learn from each other as a result.

It’s about what goes on inside the robot And then suddenly, after years of research, Robot Wikipedia is launched. The final demonstration of RoboEarth in mid-January generates a lot of (international) attention. In a reconstructed hospital room - scanned by robot Ari - there’s a patient that would like something to drink. With the help of Ari’s information, care robot AMIGO can serve the patient. The drink ends up on the floor, and there are

Care robot AMIGO.

some minor glitches, but even so the test is an absolute success.

“People want to see robots move around on a day like this, obviously.

Still, they have to realize we’re

dealing with experimental software.

In this case, we’re much more interested in what goes on inside the robot”, Sjoerd van den Dries explains. The Mechanical Engineering doctoral candidate has been working

with the RoboEarth project for several years now.

“We’re demonstrating a system design consisting of integrated components that several groups have

Zoom in | 23

See for more news www.cursor.tue.nl/en

esearchers make rom each other been working on for some time now.

It’s not a product yet. This specific example of serving a drink quite beautifully shows how knowledge is shared. It may sound simple, but someone has to translate that into voltages and motors at one point; we’re working on the tiniest level imaginable. We’ve had to figure out what’s specific and what’s generic to a robot.”

Van de Molengraft: “We’ve developed a prototype; it’s not ready to go into production at all. Of course, we can do much more with this prototype than that of four years ago, but it could easily be ten years before we can present an actual product. In the meantime, we keep pushing forward, of course. We’ve proven that a system like RoboEarth is vital to implement robots usefully and safely, and we now know what requirements such a system should meet.”

The great collaboration between the various partners has turned out to be one of reasons the project is a success. “It’s an amazing multi­disciplinary project that elevates everyone because we’re combining our areas of expertise”, Zurich-based PhD candidate Gajan Mohanarajah explains excitedly. “It really is something we can be proud of.

We’ve been given the chance to learn from each other, and because of that we did more than develop a complete architecture and algorithms; we’ve increased the project’s applicability.”

To promote collaboration, the project was divided into work clusters, so partners didn’t have to work on separate components on their own.

Van den Dries: “Combining a number of disciplines creates a flow of creativity. It’s important you speak each other’s (technical) language, though. And you have to communicate at all times to prevent groups from going in opposite directions.

It’s a wonderful setting for PhD students: you get to work with a group of international, highly experienced researchers, which is great for knowledge exchange and a welcome network boost.”

The project involves quite some traveling, but all parties consider that to be a good thing. “We’ve attended innumerable meetings and workshops. The most notable were the integration workshops, for which the whole group would meet somewhere to integrate the

separate parts into a single system”, says Zweigle. “And those moment are indispensable, too”, Van den Dries adds. “Talking over the phone or via e-mail is fine if you want to get up to speed quickly, or for solving a specific problem, but real-life discussion are far more animated. Some doctoral candidates involved in the project have spent months with a partner group.

Things like that definitely tighten the bonds.”

another major demonstration.

“Who knows, it may be in the same hospital setting with AMIGO serving a beverage again. But he’d have many robot colleagues, and he’d be operating in a large room filled with beds. Having RoboEarth as a solid

Van de Molengraft concurs.

“All those meetings help create a close-knit team. As a result, we can take larger steps. We’ve spent quite some time on planes, but distances are doable. A European project like this poses a perfect opportunity to get a major study funded. On top of that, all those workshops and demonstrations add greatly to the visibility of our group. We already have a large global network thanks to the RoboCup, but we’ve noticed RoboEarth has drawn us back into the limelight.”

Now what with RoboEarth?

Champagne bottles have popped to celebrate the successful completion of the project, but what will happen next? “Whatever happens, we’ll continue in the same direction”, says Van de Molengraft. “But we’re not yet sure how exactly, or what partners - both from the academic world as well as businesses - will be involved. For RoboEarth, Philips was our industrial partner, and } having a major name like that on board is always a good thing.

On the other hand, it’s also a good way for companies to develop their knowledge. More and more names, including Google, are realizing they have to collaborate in order to keep a finger in the pie. So over time, the willingness to join such projects will only increase. Within RoboEarth, TU/e had a coordinating role, which was a good way to present ourselves.

It’s a plus when submitting new grant proposals.”

Mohanarajah: “There are no real plan for RoboEarth 2.0. but thanks to the long-term cooperation, we all know what the others have in store, so it’s easy to find each other for new projects, maybe on a smaller scale.” And that’s why Van de Molengraft wouldn’t be surprised if in four years’ time there were

Care robots in action.

From a robot’s view.

basis, things might just start moving really quickly.”

http://www.roboearth.org/

24 | Research

6 February 2014

4 burning questions

Camille Carcouët | Chemical Engineering

Self-cleaning raspberry-like surfaces

1 ’s on f your o r e ov the c rtation? disse What

2 Wh a peo t do y ou t ple a t par ell whe n t abo ut y they a ies our s rese k arch ?

3 What person, technology, or device has been essential for your research?

1 | cover The cover of my thesis shows a silica network made of raspberries, with the red fruits representing oxygen, and the yellow ones silicon atoms -I’ve been preparing raspberry-like silica particles for the 4 years of my PhD.

2 | parties Superhydrophobicity, as exhibited by Lotus leaves, is the ability of a surface to fully repel water. That only works if the surface is sufficiently rough on top, so the water drops can roll off easily, and so take with them any dust particles. The raspberry particles prepared here have that roughness.

3 | essential

4

does w o H efit n e b ty socie our work? y from

(edited by Tom Jeltes)

To observe the raspberry nanostructures, the use of scanning and transmission electron microscopy has been indispensable to my research. Equally important, of course, are the expert knowledge and skills of those involved in the project.

4 | society benefit Because of to their self-cleaning properties superhydrophobic surfaces are very attractive and have been investigated widely already. This work provides further information about the structural requirements for the necessary roughness, so that in the not-so-distant future, you may never need to clean your windows again!

Research | 25

See for more news www.cursor.tue.nl/en

Raimondo Cau | Mechanical Engineering

Microsurgery robot 1 | cover There’s a microsurgical needle and thread there. In reality, the needle is 100 µm in diameter, and only 5 mm long. It’s used for suturing tiny blood vessels and nerves.

2 | parties Thanks to modern surgical techniques, people who’ve lost part of their tissue (after the removal of a tumor, because of a congenital defect, or after an accident, for example) can have it replaced by tissue that’s reconstructed from their own. Bodily skin, fat, muscle, or bone is removed from a location where it’s not vital, and then transplanted to where it’s needed. In order for the transplant to be successful, blood vessels and nerves must be reattached as well. It’s an extremely precise procedure (<50 µm), so a steady hand and the utmost concentration is required. During my PhD, I developed a new type of robot (the Micro Surgical Robot, or MSR) to be used in microsurgery, specifically.

The robot helps surgeons to carry out their work more easily, and even more accurately.

3 | essential I couldn’t have done without the help of my promotor Maarten Steinbuch, and co-promotor Nick Rosielle, prof. René van der Hulst of the Maastricht University Medical Center (MUMC), and the Equipment Prototype Center at TU/e.

4 | society benefit A reconstruction using the body’s own tissue yields a beautiful and natural result. And since such procedures are in ever-higher demand, waiting lists are becoming longer and longer. With the help of the MSR, these waiting lists can be cut. In the future, we’ll be able to work on an even more minuscule level.

Jarno Weemers | Chemical Engineering

Hexagonal catalysts

1 | cover The cover of my thesis shows a collection of hexagonal tiles in a honeycomb pattern. For my research project I have used catalysts based on molecules with a hexagonal structure.

The curious little guy is astonished at the variety of colors and textures on the tiles, which symbolizes the range of catalysts and catalytic reactions used.

2 | parties The main goal of my project was to develop catalysts based on cyclic phosphorus compounds, and use them in homogeneous catalytic reactions. These phosphorus compounds possess unique properties and catalysts based on these compounds are able to accelerate and steer reactions towards desired products without being consumed themselves. Results include the conversion of small molecules to much more complex molecules that may serve as intermediates for the pharmaceutical industry, and can be used as catalyst precursors again.

3 | essential In order to study catalyst particles and analyze reaction products, techniques such as nuclear magnetic resonance, X-ray diffraction, and gas and liquid chromatography are indispensable.

In addition, the great atmosphere at my former SKA/SKO department has been vital to the results obtained.

4 | society benefit I hope my compounds will be important as artificial photosynthesis catalysts, in making organic light-emitting diodes (OLEDs), and in the production of intermediates for the pharmaceutical, fragrance, and flavor industry.

26 | Zoom in

6 February 2014

What kind of home do knowledge workers prefer?

The Netherlands, and the Eindhoven region especially, needs more educated knowledge workers. More and more often they come from abroad, but the move is often quite a burden. Janneke Koeleman, who graduated from TU/e on January 29, researched the issue.

Koeleman conducted her study for the Tilburg University TiasNimbas Business School and TU/e in light of her graduate research project at the Department of Built Environment.

“The exact number of knowledge workers is unknown, but estimates vary from 12,500 to 30,000. In 2006 that estimate was 4,500, so the number has grown fast. Numbers are vague because it’s hard to distinguish between asylum seekers, refugees, expats, and students”, Koeleman says.

She created an online questionnaire and sent it to international knowledge workers and international students, most of whom she found through employee newsletters, the Holland Expat Center South, and Facebook and LinkedIn pages.

Pressure prevents expats from negotiating Previous research showed that expats’ housing preferences are quite similar to those of Dutch knowledge workers with a similar lifestyle. But Koeleman wanted to find out what their problems and complaints arose from, so she decided to research the immigration process as well: when do they arrive, and how are they informed?

She discovered that housing preferences differ per phase.

Problems are most prevalent in the first phase, except if employers mediate for knowledge workers.

Companies helped out in 39 percent of cases, especially for academic employees.

Problems often arise because expats have to search for accommodation from their home countries. They don’t have a realistic idea what to expect for the money they’re willing to pay.

Koeleman: “Expats often indicate they want to spend no more than 350 euro a month for an apartment in the city center. Since that’s impossible, most people have to let go of their accommodation of choice.

Generally, the search for accommodation scores badly, Koeleman noticed. “Most expats want a rental home (85 percent), because they have less job security. But whoever wants to rent is put on a waiting list, so they often have to resort to private rental. Mid-price rental homes are few and far between, even for Dutch tenants. And expats often have to move in a few weeks’ time, which is stressful, puts them at a disadvantage, and leaves little room for negotiating. They often accept their first option for lack of choice. There’s the language barrier, too: information and contract are often available in Dutch only.”

want a better or larger home, especially if they accepted their first accommodation ‘for the sake of living somewhere’. A new partner or a baby are also reasons for moving.”

A total of 153 people filled out the questionnaire entirely. The data of 137 of them were fit for analysis.

Is this study useful for cities and other authorities to see what kind of housing is in demand? Koeleman: “A more wide-scale, quantitative study is necessary to determine

what percentage is in favor of potential plans. Still, this research project shows a clear trend, which is partly because of the qualitative analyses I added. It would be great if this knowledge were used for further research. A larger study can only work with the participation of many employers. For this project, people had to apply for the questionnaire themselves, and it’s hard to reach lots of people. It’s just that little is known about this issue, which obviously shows from the range of knowledge worker estimates.”

Koeleman continues: “Opposed to Dutch tenants, expats prefer furnished homes (71 percent), and only few listings meet that requirement. Fees, one-time costs to acquire a house, can be high as well. Realtors often charge a month’s rent for their services, and an expat who doesn’t find a furnished accommodation has to buy everything only to leave again twelve months later. Those costs can be excessive for short stays.”

Despite the concessions, the majority is satisfied. On a scale of 1 to 5 (5 being most positive), 27 percent scores their first accommodation with a 1 or 2; 44 percent ticked 4 or 5.

Koeleman: “The longer they stay, the fewer the differences between expats and Dutch house hunters.

If they already live here, knowledge workers often move because they

Janneke Koeleman. Photo | Bart van Overbeeke The spaceboxes on TU/e campus. Photo | Bart van Overbeeke

In March, Koeleman hosts a stakeholder meeting, where her results will be presented. The presentation is followed by a brainstorming session and a discussion about short-term and long-term ideas. (GV)

Those who wish to attend can contact Janneke at J.Koeleman@tiasnimbas.edu.

People | 27

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And how are things in Santiago, Chile?

More and more TU/e students go abroad for their studies to follow courses, internships or a doctorate path.

What is it like to find your way in a new country? Students tell their stories.

This is already the nineteenth and final week of my internship at the Cerro Calán observatory in Santiago de Chile. I’m working on a new type of antenna that uses microscopic wires to transmit or receive at millimeter wavelengths. The location of the laboratory - on top of a hill in the outskirts of Santiago with a view of the Andes mountain range - is beautiful. I also love the weather (it’s summer here!), the metropolitan lifestyle and all the other wonderful things this country has to offer.

On weekends, there’s plenty to see and do in and out of town. I’ve been on several weekend excursions, including trips to Chile’s cultural capital Valparaíso, and Elqui Valley, the epicenter of Pisco production (the national drink).

The north of the country is the place to be for stargazing: the Atacama Desert has the clearest skies on the southern hemisphere, which makes it a world-class location for astronomy. That also explains the presence of so many observatories. Thanks to one of my colleagues I’ve had the privilege of visiting ALMA, the world’s most advanced radio telescope. In the photo you can see me with a mere three of the 66 antennas that make up this amazing instrument.

Even though my life in the Netherlands was anything but boring, it is wonderfully refreshing to get away from it all for a few months. Besides that, it’s very valuable to learn a thing or two about a foreign culture and language and make new friends in the process. I don’t mind going back to Eindhoven, but the thought of leaving behind this amazing country saddens me nevertheless.

But before I do, there’s still a month of traveling ahead!

Rick v M an Ke Electrai ster studmeenade cal En nt gineeri ng Would you also like to write an article about your time abroad? Please send an email to cursor@tue.nl.

Read more stories online: www.cursor.tue.nl/en

Life after TU/e

Name: LiChao Pan Place of Birth: China (ShiLongTou) Date of Birth: April 10, 1987 Studied at TU/e: September 2010 - August 2012. Master of Automotive Technology Current position: Development engineer, Bosch Transmission Technol ogy, Tilburg

What are you doing now and how did you find a job?

I’m working as a design engineer in the Advanced Engineering departm ent at Bosch Transmission Technology in Tilburg. I had received four offers (a position in Germany, two offers in the Netherlands, and a PDEng trainee position) two months before my graduation. I have applied online and went to a job fair to meet compan ies.

Why did you choose to go to TU/e?

TU/e provides one of the best automotive master programs in Europe, and 99.99% of the Dutch speak English almost fluently. That makes studying and living here easy for international students. Although Eindhoven is a only a small city (compared to my hometown ShiLongTou), it’s actually very international: not only open in educations and industries, but also brimming with international organizations and cultures.

How do you reflect on your time at TU/e?

It has been a stressful and tight study schedule. I think the university offers a perfect combination of theoretical lectures and problem-solving traineeships.

What are your plans for the (near) future?

I would like to gain more experience in research, be a good engineer, and contribute to the automotive industry in some way. I also want to finish Rotterda m marathon and be a frequent runner.

What happens to international students after they graduate from TU/e? Do they go job hunting in the Netherlands, pack their bags and explore the world, or return to their home countries? International TU/e graduates talk about their lives after TU/e.

What advice would you give to the current students?

Before deciding on your study tracks or direction of research, please take time to understand the requirements of interested companies. Learn Dutch, if you can manage.

And try to be as open and direct as the Dutch are in their daily lives.

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