On Monday 28 March a ‘pen test’ will be carried out to check the security of the classroom scanners. These people counters in University buildings were temporarily switched off in December after there was growing disquiet about privacy aspects of the devices. The pen test will be carried out in the…

To check whether the classroom scanners are secure, a ‘pen test’ was performed in the Lipsius building on Monday 28 March. This involved switching on the person counters for a day so that ethical hackers could try to gain access to the system.

Mini organs-on-chips allow us to study how diseases develop and how drugs work. Although the technology is not new, it is becoming increasingly advanced. PhD candidate Bart Kramer hopes it will eliminate animal testing in the future.

During his PhD research, mathematician Tyron Lardy worked on a new approach to hypothesis testing. Instead of the traditional p-value, he uses so-called e-values. These turn out to be more flexible – especially when you want to look at your results midway through the study.

Knowing whether or not a treatment is working just by wearing your watch? Data scientist Ahnjili ZhuParris has identified a lot of opportunities for the use of machine learning in clinical research to monitor test subjects at home.

Does gravity work the same when you look at the largest scales in our universe? That’s what Leiden physicist Alessandra Silvestri will study with a 2 million euro ERC Consolidator grant. ‘We assume that it does, but we don’t actually know.’

The two instruments of ESA's space telescope Euclid have taken their first test images. The first images indicate that the space telescope will achieve the scientific goals for which it was designed - and possibly much more. Euclid will create a 3D map of a third of the sky, allowing scientists to study…

Jianfeng Ge and Milan Allen of Leiden University look for majorana quasiparticles using shot noise measurements

Leiden PhD candidate Jo-Anne Verschoor discovered that nearly twenty percent of the bacterial strains she studied could degrade plastic, though they needed some encouragement to do so. ‘Bacteria are just like people,’ says Verschoor. Her research was published in the journal Communications Biology,…

PhD candidate Sibel Bahtiri is one of the new Faces of Science. In videos and blogs, she will show what life is like as a young researcher.

The role of the Board of Examiners is to ensure that study programmes adhere to their Course and Examination Regulations. The Board of Examiners oversees all tests and examinations within the institute and determines whether students have acquired the knowledge and skills required for the awarding of…

Not sure what your next step is in choosing your studies or planning your career? Science Career Service is here to help, from making study choices to career orientation and preparing for the labour market.

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Are you not sure whether you have chosen the right study programme? Are you finding it hard to decide which study programme to do next? The advisers at Leiden University’s Career Services are on hand to offer help and advice.

Do you want to be optimally prepared for your career? On the Leiden University Career Zone you can find everything you need to start working towards your future career. You can also contact the university’s Career Services for advice on career preparations and choices during your studies.

As a university, we offer you the best education you can get. Professors, tutors and lecturers are ready to teach and guide you. But we do more than that. Of course, studying is your own responsibility, but we are happy to help if you need support. You decide what and when; online or on campus. These…

It is possible to develop and improve your study skills. By using the SMART method you can learn to study strategically, be academically competent, have confidence about taking exams and manage your time well. Of course all this is only possible if you put in enough hours.

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Everything students should know about honours education at Leiden University.

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To understand the universe as a whole, simulations on a cosmic scale are required. An international team of astrophysicists, led by Leiden University, is today making one of the largest cosmological datasets ever available for free. It comprises more than 2.5 petabytes of simulation data.

If you need extra assistance, guidance or facilities there are several staff members who can help. Who you should speak to depends on the nature of your situation.

Doing your taxes, Netflixing or driving a car: more and more daily activities are supported by computer applications. It is challenging and expensive to test software thoroughly, leading to errors in most applications. PhD candidate Benjamin Lion made a mathematical framework to deal with this problem.…

Is it acceptable for an algorithm to make mistakes? Quinten Meertens investigated this at Leiden University and the UvA and has been nominated with his research for the prestigious Christiaan Huygens Science Prize. The winner will be announced on 11 October. In April, Meertens received his doctorate…

This page provides information on what you can do if you disagree with a decision made by Leiden University.

How did a fifteen year old paper receive an award? It happened to LIACS professor Todor Stefanov and his colleagues. Their paper was awarded with the Test of Time Award, an international award for papers that had the highest impact over time. This paper in particular is about Daedalus, a framework used…

Leiden researchers have developed a groundbreaking model to advance cancer immunotherapy. Using a 3D printer, they create mini-tumors within an environment that closely mimics human tissue. They have also developed a method to monitor real-time interactions of these mini-tumours with immune cells during…

Do you recall all those drugs that were hastily proposed as potential treatments for COVID-19? In the event of a future pandemic, the goal is to offer an effective treatment more quickly and efficiently. To achieve this, a team led by Coen van Hasselt is developing a platform that can speed up the process…

Can you prove whether a large quantum system truly behaves according to the weird and wonderful rules of quantum mechanics — or if it just looks like it does? In a groundbreaking study, physicists from Leiden, Beijing en Hangzhou found the answer to this question.

While tens of thousands of visitors dance to deafening music, a team of Leiden psychologists are trying to collect data for their research at Lowlands. How do festivalgoers experience a virtual trip? And what role do factors such as too little sleep and whether they have experience with psychedelics…

Autism spectrum disorder, or ASD, is the term for a range of neurodevelopmental conditions or differences which can impact your studies at Leiden University.

Dyslexia is a learning disorder which is common among students and can impact your studies at Leiden University.

AD(H)D stands for Attention Deficit(-Hyperactivity) Disorder, which is a common disorder that can impact your learning at Leiden University.