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Yu-Wen Chen

About Yu-Wen Chen is a first-year PhD student in the Interactive Intelligence group at TU Delft, supervised by Dr. Pradeep Murukannaiah and Prof. Dr. Catholijn Jonker. Prior to the start of this PhD position in September 2021, She obtained cum laude MA and MSc in Language and Communication Technologies from the University of Groningen and Saarland University. Her research focuses on using Natural Language Processing to recognize actors, values, and appeal within the climate change debate. Her project is part of the HIPPO DAI Lab , with the goal to support stakeholders with AI during the public policy deliberation and negotiation. Yu-Wen Chen Y.W.Chen@tudelft.nl Van Mourik Broekmanweg 6 2628 XE Delft The Netherlands

Meet & Eat | Local Community Engagement in Design Education – Can Cats and Dogs Live Under One Roof? with Reinout Kleinhans | 12 April

Meet & Eat | Local Community Engagement in Design Education – Can Cats and Dogs Live Under One Roof? with Reinout Kleinhans | 12 April 12 April 2022 12:30 till 13:30 - Location: Teaching Lab - By: Teaching Academy About this event | Click here to sign up directly Many lecturers at TU Delft seek to connect their teaching to current societal and global challenges in the ‘real’ world. This can require various forms of interaction with target groups, communities of ‘users’ or other stakeholders of design products. This is also known as community engagement. Think for example about the redesign of a neighbourhood park, a square or a public transport facility. However, community engagement (CE) is notoriously difficult in the context of time-bounded courses at TU Delft. While CE can have major benefits, real people and their interests can be harmed if students and their instructors mess up. Mutual Trust and reciprocity are delicate issues. So how to start if you want to incorporate CE in your teaching? In this Meat &Eat session, Reinout Kleinhans (Education Fellow 2020) will discuss the balancing act of engaging local (residential) communities and other stakeholders in student research in university courses. Underlying the short presentation is a conceptual framework that identifies six key challenges and practical solutions for CE in existing or new courses. This Meat &Eat session is particularly relevant for university lecturers and other staff who seek more intensive collaboration with non-university partners in the context of challenge-based university education, exemplified by Joint Interdisciplinary Projects (JIPs), the City Deal ‘Kennis Maken’ and many other examples. About Reinout Kleinhans Reinout Kleinhans is Associate Professor of Urban Regeneration and Neighbourhood Change at the Faculty of Architecture and the Built Environment, Delft University of Technology. His research and teaching interests and expertise include urban regeneration, citizens’ self-organisation, community entrepreneurship, challenge-based learning and community engagement. Please note We are happy to inform you that this Meet & Eat will be organised in the Teaching Lab. A vegetarian lunch will be provided. Please let us know if you have any dietary wishes. In case you are not able to join the event (last minute), please let us know by sending an email to teachingacademy@tudelft.nl . Click here to sign up

ABP Pension Information Meeting April

ABP Pension Information Meeting April 05 April 2022 10:00 till 14:30 - Location: Online Your ABP Multi optional Pension! Our society is constantly changing and your pension is changing with it. Changes in State pension ages, pension accrual and choices when you retire often make retirement a difficult subject. For many people, retirement seems a long way off, for others it is getting closer and closer. Either way, it is important to delve into your pension. And to get answers to questions like: Can I retire sooner, or later? What is conditional pension, and what should I look out for? How much pension and State pension do I accrue? How much pension can I have paid out if I retire? What happens to my pension if I work less? What is surviving dependents pension and what can I do with it? I want to make calculations myself: how does MIJNABP work? Do you have these or similar questions? Retirement is important As an employer, we think it is important that you know what the possibilities are with your ABP pension. That is why, in cooperation with ABP, we have organized an online presentation. During this meeting you will receive answers to the above questions.You can follow the presentation at home, or in the workplace, through Microsoft Teams. Microsoft Teams also offers the opportunity to ask questions to the ABP pension officer during the presentation, which can be done both verbally and through chat functionality.. However, the presentation is not intended to elaborate on personal case studies. Who? International employees and their partners at TU Delft who are interested in learning more about the Pension System in the Netherlands. When? 5 April 2022 - 10.00 to 11.30 for employees < 55 years. Sign up for this online presentation? CLICK HERE Participants are asked to sign in to Microsoft Teams 10 minutes before the presentation starts so that the presentation can start on time.

Look back DEWIS Virtual Coffee February

Thanks to all the participants of the last DEWIS (online) Coffee Meeting in February! We had a great discussion and reflection about challenges and benefits of remote working during the Pandemic. It was nice to see that in the end, despite being a hard time for everyone we all were able to go through the challenge and grow stronger than before. We are all strong resilient women of science!! During the talk common and similar experiences and stories have been shared by the participants and here below (Figure 01) we captured some of the insights and personal stories shared. Figure 01. Personal Stories & Experiences shared by the participants during the last coffee meeting After that, we discussed and brainstormed together: ‘How can we foster a ‘Culture of Care’ within universities?’ Figure 02. Insights captured during the discussion of the last coffee meeting. In conclusion we all agreed that we need to create a network of support and being supporters for each other , always asking your peers and colleagues how they feel and offer your help. Don’t be afraid of reaching out if you need help yourself or simply need to chat with someone for some company! We are all on the same boat, we all go through difficult moments and we all need human contact to thrive and feel alive. In Figure 2 we captured some of the thoughts of the discussion. Hopefully, this has been the last Online Meeting and from next ones we can meet again in a physical space. Our first upcoming networking event will be our Spring Networking Diner! It was also the last meeting facilitated by Chiara Marradi , who unfortunately moved on in her career (now she lives and works in Belgium). However, she was grateful to be part of this network of inspiring women!

Koen Jurgens joined ImPhys as MSc student

Koen Jurgens is a Molecular and Cellular Life Sciences Msc student from Utrecht University, track Biophysics & Molecular Imaging. He will 3D print phase plates to engineer the point spread function, and consecutively evaluate the performances to optimize the design of these phase plates. His supervisor is Bernd Rieger.

Kornelis Blok in Foodlog over energiecrisis na oorlogssituatie Oekraïne

Door de oorlogssituatie in Oekraïne zijn de energiekosten en brandstofprijzen geexplodeerd. Om het Russisch gas niet meer nodig te hebben komt het Internationaal Energieagentschap (IEA) met een tien-punten-plan.

The Berlage Sessions: On Detail

As part of The Berlage Sessions, Christoph Kumpusch gives the lecture 'On Detail'.

Webinar Remote Teaching | Getting a BOLD Edge: Student Readiness for Learning in a Digital World | 13 April

Webinar Remote Teaching | Getting a BOLD Edge: Student Readiness for Learning in a Digital World | 13 April 13 April 2022 10:00 till 11:00 - Location: Online - By: Teaching Academy This webinar reports why learning how to learn online is now a crucial life skill and cannot be left to chance. It outlines what we know from the research on student readiness for successfully engaging in new forms of blended, on-line and digital (BOLD) learning and shares an innovative effort to help give learners a digital edge for their study. The basic thesis woven throughout the talk is that we can learn a lot on how to design our courses and what it really means to be a BOLD learner by taking more time and creating opportunities to listen to the “voice” of learners. Student Readiness is a focus in the DigitTeL Pro project in collaboration with the 3 courses: ' Synchronous Hybrid ', ' Blended ' and ' Online Distance '. If you are interested in DigiTeL Pro or the courses, the presentation slides of the launch session in November 2021 are available, including the full launch recording : Introduction CPD and DigiTeL Pro by George Ubachs (EADTU – European Association for Distance and Teaching Universities) Student Readiness for Digital Education by Mark Brown (DCU – Dublin City University) Synchronous Hybrid Education by Marieke Pieters (KU Leuven – Katholieke Universiteit Leuven) Blended Education by Naomi Wahls (TU Delft – Delft University of Technology) Online Distance Education by Albert Sangrà (UOC – Universitat Oberta de Catalunya). Future webinars will be announced once the titles and descriptions are finalized. If you have a topic that you would like us to cover, please email Naomi directly: n.l.wahls@tudelft.nl . Join the weekly webinars via MS Teams group

Hans de Bruijn in Trouw over de kracht van toegeven

Hans de Bruijn legt in zijn column uit dat Baudet geen genuanceerd standpunt heeft in zake de oorlog in Oekraine, maar wegkijkt.

Half Height Horizontal

Boosting sustainable building education

Boosting sustainable building education in The Netherlands On 17 September, TU Delft launched a new initiative to implement sustainable building practices across the Dutch educational landscape by bringing together educators from Dutch vocational institutions (MBO) and TU Delft lecturers. Last week, the kick-off event at The Green Village on the TU Delft campus brought together 10 educators from MBO institutions and lecturers from TU Delft’s Sustainable Building with Timber MOOC. Educating for impact From September to December 2024, the MBO educators will participate in the MOOC as students: watching videos, completing course exercises, and submitting assignments. Additionally, they will engage in online sessions guided by TU Delft lecturers, who provide subject matter expertise, and an educational expert supporting the online learning process. From December through June 2025, the focus will shift to creating adaptable and open teaching resources specifically developed for MBO institutions. A ripple effect By equipping teachers with the tools and knowledge to teach sustainable building, the initiative supports the transition to more environmentally responsible practices within the building industry. The knowledge shared through this programme will shape the future workforce and contribute to a more sustainable world. While initially targeting a limited number of MBO institutions, the initiative’s impact is expected to extend far beyond. As educators integrate the materials into their curricula, the knowledge will reach future generations of students, amplifying the long-term influence of the project. Sustainable Building with Timber MOOC Course details A two-way learning process This mutually beneficial project embodies lifelong learning. MBO teachers gain access to innovative teaching materials on building with timber, while TU Delft benefits from the practical insights these practitioners bring from the field. This knowledge exchange enhances vocational education and strengthens TU Delft’s research and teaching. Open resources for lasting impact A key goal of the project is to create open-access, customisable teaching materials, enabling educators to tailor content to meet the specific needs of their institutions and students. This flexible approach fosters the teaching of sustainable building techniques. Acknowledgements Heartfelt thanks to everyone involved in making this initiative possible. Together, we are laying the foundations for a more sustainable future.

Do something that matters

We komen in Nederland in het basis- en voorgezet onderwijs samen 13.500 leraren tekort. Het leraarschap heeft niet altijd de reputatie die het verdient. En dat terwijl het alles in zich heeft. Daarom startte Universiteiten van Nederland (UNL) vorig week de campagne ‘Doe iets wat ertoe doet’. Het doel is om mensen met een nieuwe blik naar het leraarschap te laten kijken.

Three Students Nominated for the ECHO award

Three TU Delft students have been nominated for the ECHO Award 2024. The ECHO award is awarded to students with a non-western background who are actively engaged in society. Sibel, TJ and Pravesha talk about their background their nomination. The finalists will be selected on September 27th. Sibel Gökbekir How has your background influenced your academic journey? As a woman with Turkish roots, my academic journey has been about more than just pursuing degrees in engineering and law; it’s been about consistently advocating for the diverse needs of women and multicultural groups, ensuring their voices are heard in important decisions. This is why I actively contributed to different board positions at TU Delft, working to promote inclusivity and equality. My background inspired me to explore how engineering, law, and social justice intersect, particularly in empowering marginalised communities. I chose to study energy transitions and human rights to contribute to a fairer, more inclusive World. How have you turned this into contributions to society? I’ve dedicated my academic and personal life to promoting diversity and inclusion. As a youth ambassador for Stop Street Harassment, I aimed to create safer spaces for women and minorities because I believe everyone has the right to feel free and safe in society. Through the Turkish Golden Tulip Foundation, I advocated for vulnerable communities in earthquake relief. Additionally, I founded an initiative for migrant students in Rotterdam-South and I have been committed to improving educational opportunities for secondary school students with a migration background. Next, I gave guest lectures across the Netherlands to educate the younger generation about climate change and equitable energy transitions, emphasising the importance of a fair transition for all communities. What does it mean for you to nominated to the ECHO award? I feel very honoured to have been nominated on behalf of TU Delft. My commitment to community engagement is part of who I am, and therefore the ECHO Award is more than just a recognition; It offers me an opportunity to further expand my contributions to a more inclusive society. As an ECHO Ambassador, I plan to expand my efforts in promoting equality and sustainability, while inspiring others to take action for a more equitable World. TJ Rivera How has your background influenced your academic journey? My background as a Filipino in a Dutch-speaking bachelor’s programme made my academic journey both challenging and enriching. Being gay in a male-dominated field like Architecture, where most role models were heteronormative men, added another layer of difficulty. It was intimidating to not see people like me represented. However, this experience fuelled my belief that systems can and should be challenged, changed, and updated. I aimed to bring a fresh perspective, advocating for greater diversity and inclusivity in the field. How have you turned this into contributions to society? I translated my personal challenges into tangible contributions by advocating for inclusivity within architecture. Together with like-minded individuals, I began exploring the intersection of identity, sexuality, and architecture, and collaborated with my faculty’s diversity team to raise awareness. As I became known for my work with the queer community, I saw an opportunity to create lasting change. I co-revived ARGUS, the once-inactive study association for the Master of Architecture, which now serves as a platform to discuss and address issues of diversity within the field. This initiative continues to foster a more inclusive academic environment. What does it mean for you to be nominated to the Echo award? Being nominated for the ECHO Award is a significant milestone in my journey to expand my mission beyond the confines of my faculty. This national platform provides the opportunity to raise awareness and advocate for social justice on a larger scale. I believe students are key to driving change, and my focus is on amplifying the voices of the queer community, which is often overlooked. The ECHO Award will enable me to form partnerships with organizations and universities, further promoting diversity, inclusivity, and equality. It’s a chance to create broader, tangible change, addressing the needs of those who often go unheard. Pravesha Ramsundersingh How has your background influenced your academic journey? As a woman in STEM (Science, Technology, Engineering, and Mathematics), my background has been a powerful motivator to challenge gender disparities within Computer Science. Experiencing firsthand the underrepresentation of women in this field, I have been driven to not only excel academically but also become an advocate for diversity. Through leadership roles in the Faculty and Central Student Councils, I’ve focused on creating an inclusive environment that supports women and minority students, ensuring that everyone has the opportunity to succeed. How have you turned this into contributions to society? I’ve translated my experiences into actionable contributions by actively advocating for DEI at TU Delft. I ensured sexual education and consent training for 3,000 freshmen students, and I led initiatives like the Social Safety Initiatives Conference alongside the Dutch National Coordinator against Racism and Discrimination. In my student governance roles, I pushed for policies that address gender discrimination and social safety concerns, creating a more supportive environment for students of all backgrounds to thrive in both academic and social spaces. What does it mean for you to nominated to the ECHO award? Being nominated for the ECHO Award is an incredible honour that highlights the importance of the work I have done to promote DEI. It inspires me to continue advocating for systemic change in the tech industry and academia. This nomination reaffirms my commitment to driving equity in STEM, ensuring that future generations have more inclusive opportunities. It also motivates me to keep pushing boundaries and empower others to take action for a more just and equal society. The ECHO Award Every year ECHO, Center for Diversity Policy, invites colleges and universities to nominate socially active students who make a difference in the field of Diversity & Inclusion for the ECHO Award 2024. The ECHO Award calls attention to the specific experiences that students with a non-Western background* carry with them and the way they manage to turn these experiences into a constructive contribution to society. Winners are selected by an independent jury and may attend a full-service Summercourse at UCLA in the United States in 2025. Read more: ECHO Award - ECHO (echo-net.nl)

All renewed BK bachelor courses relate to Sustainable Development Goals

All 24 courses in BK’s renewed bachelor’s programme are now connected to at least one Sustainable Development Goal (SDG). The most prevalent SDG in this new programme is SDG 11 (Sustainable Cities and Communities), followed by SDG 4 (Quality Education) and SDG 15 (Life on Land). In total, 14 of the 17 SDGs are linked to at least one course: a starting point for better integrating sustainability in the courses’ contents, assignments and teaching materials.

2nd round of the 2024 SPRINT funding call with São Paulo, Brazil

The second round of the 2024 SPRINT call has opened . This SPRINT (São Paulo Researchers in International Collaboration) fund supports exchange visits and/or joint workshops undertaken by TU Delft staff and researchers from the State of São Paulo, Brazil. SPRINT funds the initial phase of joint international research collaborations with clear expectations that the researchers will submit a follow-up research proposals that continues the research started under SPRINT and consolidates the research partnership. The deadline for the 2024.2 edition is October 28, 2024.The total duration of a project can be 1 year, and the budget envelope is up to 7,500 Euro from TU Delft and up to 10,000 USD from FAPESP. FAPESP and TU Delft will fund a maximum of 4 approved proposals under this call. Please note that the Brazilian partners must have a current project funded by FAPESP to be eligible. Applicants need to send an application to both FAPESP and TU Delft. See full details in the call conditions. More information from FAPESP on past and present SPRINT calls can be found here. Questions on the call can be directed to Daphne van de Sande at D.vandeSande@tudelft.nl or Marie Kummerlowe at a.m.kummerlowe@tudelft.nl . SPRINT 2024.2 – Guidelines Delft University of Technology

Cutting-Edge Multi-Camera System for Multi-Modal Data Capture

Researchers from the Intelligent Systems department have built an advanced multi-camera capture system designed for high-quality data collection from objects and people. By incorporating existing audio devices, this system enables the recording of multi-modal data from human social interactions including both video and audio, offering invaluable resources for understanding human behavior, modeling physical objects, and analyzing human-object interactions. 

Breaking the bubble in Buitenhof: TU student explores the connecting power of a mural

Op 16 september onthulde burgemeester Marja van Bijsterveld officieel de nieuwe muurschildering ‘Cherished’, op de flat aan de Haydnlaan in Buitenhof. TU Student Virginia Facciotto deed voor haar master ‘Design for Interaction’ een half jaar onderzoek naar de vraag wat de waarde van een mural is voor de wijk: “De muurschildering kan zeker bijdragen aan een positief beeld over de wijk, maar dan moet wel het hele verhaal verteld worden.”

Unconscious Bias session during Summer Introduction Programme (18-22 August 2024)

As part of Summer Introduction Programme , our colleagues Fatima Ait Bari and Stavroula Manolaki of the Diversity & Inclusion (D&I) Office gave an engaging presentation on Unconscious bias. The audience consisted of a group of master’s, exchange and bridging students, many from the international community, arriving at TU Delft this academic year 2024-2025. The session had as a goal to take the students along a “journey” of exploring how unconscious biases are formed, how they influence our interactions, and how we can become more aware of them. Participants were encouraged to reflect on their own biases and consider how they hinder their connection with people with diverse perspectives. Through interactive discussions and scientific insights, the presentation emphasized the importance of focusing on shared similarities to foster inclusive relationships. The D&I colleagues guided the students through a thought-provoking journey, helping them take steps toward greater inclusion and understanding in both academic and social environments. The presentation ended with encouraging the students to “Get together on the basis of our similarities; to grow on the basis of our differences”. We wish all new master, exchange and bridging students a successful and enjoyable academic year at TU Delft!

Fresh from Cafe X, not from the delivery service: food deliveries are not allowed

Geen eten bezorgen bij X
We hebben een nieuwe regel opgenomen in de huisregels van X met betrekking tot het nuttigen van afhaalmaaltijden bij X. Het is niet toegestaan om eten te laten bezorgen door een bezorgdienst en dit op het terrein te nuttigen. Je bent natuurlijk wel van harte welkom in Café X voor een hapje en een drankje.

Equity, Diversity & Inclusion Month 2024

In oktober 2024 viert de TU Delft de EDI-maand met als thema: United for Change, Together We Grow. Gedurende de hele maand biedt het Diversity & Inclusion office in samenwerking met de faculteiten, netwerken en serviceafdelingen workshops, trainingen en andere evenementen georganiseerd door en in de meeste gevallen aangeboden door collega's binnen de TU Delft.

NWO grants funding for innovative research on physical experimental environments

How to move from experiment to mainstream? A consortium led by professor Tamara Metze, has been awarded a prestigious grant from the Netherlands Organisation for Scientific Research (NWO). In search for pathways toward more sustainable futures, Metze and her team will explore how various innovations in field labs such as The Green Village, in urban living labs such as Engy Lab South-East in Amsterdam, and in all sorts of citizens’ initiatives, can be mainstreamed and make more impact on sustainability transitions. Pilot paradox The project ‘From EXperiment to sustainable change: TRAnsformative methodologies for Innovation and learning’ (EXTRA) seeks to overcome a persistent “pilot paradox”. In this paradox, much experimentation takes place but long-term systemic impact remains difficult. Researchers together with all sorts of change makers will synthesise existing knowledge on how to mainstream, upscale, spread, broaden and deepen developed innovations. Tamara Metze: ‘I am excited to unravel what are effective ways of cocreation that lead to mainstreaming the positive changes made in experimental environments. We will figure out how learning and innovation can lead to lasting changes in regulations, policies, and financial systems and the biophysical environment.’ Tamara Metze Read the NWO press release Actionable tools The project is crucial for accelerating sustainability transitions. By refining methodologies for mission-driven experimentation and develop hands on tools for all sorts of change-makers, it will be easier to mainstream the sustainable lessons and innovations. ‘These tools will not only aid grassroots innovators but also influence institutional and organisational structures, ensuring that lessons learned from experiments are better anchored in policies, regulations, and organisations’, explains Metze. The project will employ a transdisciplinary action research approach, bringing together knowledge from various disciplines and policy domains. By co-creating solutions with public and private partners, the research will have an immediate impact. In the long term, the project aims to build a more efficient innovation ecosystem, contributing to more impactful and sustainable outcomes for both society and the environment. Projectpartners TU Delft, VU Amsterdam, Wageningen University & Research, Hogeschool van Amsterdam, Erasmus Universiteit Rotterdam, Hogeschool Rotterdam, The Green Village, AMS Institute; PBL Planbureau voor de Leefomgeving, WoonFriesland, Dijkstra Draisma, Provincie Noord-Holland, Ministerie van Binnenlandse Zaken, PRICE / Almere, BouwLab, Alliantie Samen Nieuw-West, Innovation Quarter.

Interview Eveline Vreede with Digitaal Veilig Den Haag

Eveline Vreede is the Managing Director of our Safety & Security Institute. She is responsible for collaborations, programs and the development of the Safety & Security theme at TU Delft | Campus The Hague. Among other things, she connects the institute with government agencies. Digitaal Veilig Den Haag spoke with her about the institute's activities in the field of digital security.

TU Delft Excellence Fund supports Prof. Stefan Witte and Dr Anasua Chatterjee

With support from the TU Delft Excellence Fund, two prominent scientists recently started their work at TU Delft. As per September, Prof. Stefan de Witte has been appointed Professor of Optics for Nanoscale Metrology at the department of Imaging Physics.

Researchers Use an EUV Flashlight and Free-Air Diffusion, Plus a Clever Algorithm, to Inspect Chips

Postdoc Yifeng Shao (ImPhys) and his colleagues from Delft and Utrecht University have investigated a new imaging technique using extreme ultraviolet light to study the three-dimensional structures of chips at the nanoscale.

Outstanding Paper Award on Scientific Understanding in RL

M. Suau, M. T. J. Spaan, and F. A. Oliehoek were awarded the Outstanding Paper Award on Scientific Understanding in RL at the first Reinforcement Learning Conference (RLC).

Professor of Urban Design Tess Broekmans: ‘Designers must learn to listen better’

Tess Broekmans, co-owner of Urhahn urban design and strategy, delivered her inaugural address as professor of Urban Design on Friday 6 September. In it, she addressed ‘the complexity of the everyday’. After all, how can designers' visions connect better with people's everyday lives? In doing so, she also sees a new role for area developers.

2 Veni Grants for the ELLIS Unit

In an effort to make new and strengthen existing connections, a delegation of ELLIS Unit Delft visited ELLIS Munich and some of the most renowned AI research institutions in Munich area on the 25th and 26th of January 2024. The delegation consisted of people from TU Delft’s cognitive robotics department, and the sequential decision making group.

Unusual waves grow way beyond known limits

Waves that come from multiple directions are extremer than extreme. These remarkable deep-sea waves can be four times steeper than what was previously imagined, as is shown in research by TU Delft and other universities that was published in Nature today. A long time ago, stories were told of mysterious rogue waves that materialised out of nowhere and could topple even the largest ships. These waves lost their mythical character when the first rogue wave was recorded at the Draupner platform in the North Sea. In 2018, Ton van den Bremer and his colleagues at the Universities of Edinburgh and Oxford managed to recreate the Draupner wave in the lab for the first time ever, and this opportunity to study freak waves closely produced unexpected insights. Multiple waves push up water New research by the research consortium now shows that these remarkable waves do not break when traditional theories hold they should, the secret behind which lies in how they arise. Ton van den Bremer, expert on fluid mechanics at TU Delft and led the study, explains: “When most people think of waves, they think of the rolling waves you’d find on a beach. The type of wave we studied occurs in open water and arises when waves coming from multiple directions come together. When these waves with a high directional spread converge, the water is pushed upwards, forming a partially standing wave. An example of this is known as a crossing wave. How crossing waves arise Under certain conditions at sea, waves from multiple directions occur. This can happen in a place where two seas meet, or where winds suddenly change direction, as in a hurricane. When waves from two directions meet, a cross wave occurs, provided their directions are far enough apart. The study also shows that the further apart the directions are, the higher the resulting cross-wave. Travelling waves break when they reach a certain limit, this is when they reach their maximum steepness. The study shows that waves with a multidirectional spreading can get as much as 80% steeper than this limit before they start breaking, which means they can get almost twice as high as ‘normal waves’ before they start to break. Travelling wave (l) and a wave with high directional spreading (r) Breaking waves that grow Next, the researchers found another highly unusual phenomenon that defies existing theories, a phenomenon that is unprecedented according to Van den Bremer: “Once a conventional wave breaks, it forms a white cap, and there is no way back. But when a wave with a high directional spreading breaks, it can keep growing.” The study shows that these enormous waves can grow to twice their original steepness while breaking, which is already twice bigger than the conventional limit. Together, the waves can grow four times steeper than previously thought possible. Damage to offshore structures The knowledge that multidirectional waves can become as much as four times larger than was deemed possible can help design safer marine structures. "The three-dimensionality of waves is often overlooked in the design of offshore wind turbines and other structures in general; our findings suggest this leads to designs that are less reliable", says Mark McAllister of the University of Oxford, who led the experiments and is now a senior scientist at Wood Thilsted. Innovative vertical sensors made it possible to take accurate 3D measurements of waves. Innovative 3D measurement method A 3D measurement method developed in the FloWave lab paved the way for these new insights. “Conventional 2D wave measurement methods weren’t up to the task”, Van den Bremer explains, which is why the research group designed a new way to create 3D wave measurements. Ross Calvert of the University of Edinburgh: “This is the first time we've been able to measure wave heights at such high spatial resolution over such a big area, giving us a much more detailed understanding of complex wave breaking behaviour." FloWave Ocean Energy Research Facility in Edinburgh. The circular basin has a diameter of 25 metres and can be used to generate waves from multiple directions. Header image by: Fabien Duboc

A strong nose for trouble

Ammonia gas – it is both highly poisonous and corrosive, yet also often used in industry, or present around intensive livestock farming. To better mitigate the risks of ammonia leaks, Paddy French together with Lina Sarro and Sten Vollebregt will make smaller, more robust and eventually more affordable ammonia sensors. The NWO OTP programme has funded their research into a fully-integrated, single-chip sensor that incorporates two porous silicon carbide structures for detecting ammonia and humidity, all in a single layer and one etch step.

Stefan Witte joins Imaging Physics as professor

Delft University of Technology's Executive Board has appointed Stefan Witte as professor of Optics for nanoscale metrology in the Imaging Physics department of the Faculty of Applied Sciences as of September 2024. Thanks to the TU Delft Excellence Fund, Stefan Witte can get off to a flying start with his new research group and expects to obtain the first research results soon.