Building a Deep Cross-media Transfer Network to extract visual relations that relieve the problem of insufficient training data for visual tasks.

Understanding the formation and evolution of planetary systems is one of the most fundamental challenges in astronomy. To directly image and study young exoplanets and the circumstellar disks they form from, dedicated high-contrast imaging instruments are built.

Promotor: Prof.dr. T. Hankemeier, Co-promotor: Theo Reijmers

Promotor: C.J. ten Cate

Supervisor: P.J.J. Hooykaas Co-Supervisor: R. Offringa

Ice, the solid state of water, plays an important role on our planet as well as the entire universe.Despite the fact that an individual water molecule has a very simple structure, its chemical bonding in the solid phase can be surprisingly complex.

Promotor: J. Zaanen

Promotor: Prof.dr. F.S. de Boer, Co-promotor: D. Clarke

Gibbs measures, as used in Statistical Mechanics, have a definition that is remarkably similar to the definition ofg-measures, used in dynamical systems.

Promotor: H.V.J. Linnartz

Promotor: Prof.dr. M.L. van Hecke

The parabolic Anderson model (PAM), which is the Cauchy problem for the heat equation with random potential. The PAM is a mathematical model that describes how mass (i.e. matter or energy) flows in a medium in the presence of a field of sources and sinks.

Humans perceive the real world through their sensory organs: vision, taste, hearing, smell, and touch. In terms of information, we consider these different modesalso referred to as different channels of information or modals.

Promotores: Prof.dr. A.G.G.M. Tielens, Prof.dr. L. Kaper (UvA)

The formation and evolution of galaxies is fundamentally driven by the formation of new stars out of cold gas.

Sterrenkundige Ignas Snellen onderzoekt atmosferen van exoplaneten met als uiteindelijk doel aanwijzingen voor leven te vinden. Dat lukt steeds beter dankzij alsmaar slimmere meetmethoden van zijn onderzoeksgroep. ‘Binnen tien jaar wordt het echt spannend.’ Oratie 8 november.

Planeten in andere zonnestelsels bevatten waardevolle informatie over het ontstaan van planeten en leven. Promovenda Yapeng Zhang heeft hun atmosferen bestudeerd door te kijken naar hun kleinste onderdelen: isotopen. Met haar onderzoek hoopt ze te ontdekken wat ons eigen zonnestelsel uniek maakt.

Tijdens het bestuderen van zestien jaar aan meetgegevens van jonge sterren ontdekte de Leidse masterstudent Sam de Regt dat twee van die sterren nog gehuld waren in geboortewolken. Nog niet eerder bracht iemand deze twee sterren zo scherp in beeld. Hij publiceert zijn opschoonmethode en de nieuwe afbeeldingen…

Een internationaal team van sterrenkundigen waaronder ook Leidse wetenschappers publiceert het beeld van een jonge ster met een omringende stofschijf die nog steeds gevoerd wordt vanuit de omgeving. Het verschijnsel rond de ster SU Aur kan verklaren waarom zoveel exoplaneten niet netjes uitgelijnd zijn…

Astronoom Jos de Boer heeft in Nice de Chesneauprijs in ontvangst genomen voor zijn onderzoek naar zogeheten protoplanetaire schijven. De prijs wordt toegekend aan het beste sterrenkundige proefschrift op het gebied van hoge ruimtelijke resolutie. ‘Ik zie het als een goede kans om over mijn onderzoek…

Met een speciaal symposium in museum Boerhaave vierde ESO op maandag 26 september haar 60-jarig bestaan. Meer dan 100 wetenschappers, politici en mensen uit de industrie waren aanwezig om terug te kijken op samenwerkingen, mijlpalen en ontdekkingen. De Leidse astrochemicus Ewine van Dishoeck was één…

Promotor: W. Jiskoot, Co-promotor: A. Hawe

We have studied shape with a particular focus on the zebrafish model system. The shape is an essential appearance of the phenotype of a biological specimen and it can be used to read out a current state or response or to study gene expression.

In the Schouwburgstraat, LUGO is currently redesigning the back-garden in order to increase biodiversity and make it a more beautiful space. Throughout October 2023 until March 2024, we will be making changes to the garden with our team of volunteers.

G protein-coupled receptors (GPCRs), one of the largest families of membrane proteins, are responsive to a diverse set of physiological endogenous ligands including hormones and neurotransmitters.

Early time-resolved experiments by Frauenfelder on the ensemble of the kinetic rebinding of CO to myoglobin molecules resulted in a stretched exponential relaxa-tion due to a very large spread of the reaction rates of individual molecules.

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: M.R. Hogerheijde

Promotor: E. Bouwman, Co-promotor: S. Bonnet

Natural history collections provide invaluable sources for researchers with different disciplinary backgrounds, aspiring to study the geographical distribution of flora and fauna across the globe as well as other evolutionary processes.

The function of TLRs in innate immunity has aroused worldwide attention soon after its discovery. Because of the broad functions of TLR2 in innate immunity, the drive for the development of TLR2-targeted vaccines or therapeutic treatments has accelerated in the last decades.

A modern ship design process is subject to a wide variety of constraints such as safety constraints, regulations, and physical constraints.

Alumni-activiteit, New York

The key purpose of this project is to study tautological relations on the level of closed differential forms or even integral cochains (i.e. we don't take classes in cohomology).

This dissertation presents the results of the importance of creativity for ICT-students of Dutch universities of applied sciences (in Dutch: hogescholen), and the functioning of training courses that aim to promote creative abilities is highlighted.

This thesis investigates how galaxies form and what diversifies the evolutionary histories of galaxies.

Promotor: T.J. Aartsma, Co-promotor: R.N. Frese

Promotor: K. Kuijken, Co-Promotor: H. Hoekstra

The Standard Model (SM) of particle physics fails to explain several observed phenomena and is incomplete. In order to resolve this problem, one may extend the SM by adding new particles.

Promotor: M.A.G.J. Orrit

Streptomyces are bacteria abundant in soil that participate in diverse and complex interactions. These bacteria are the main producers of the antibiotics we currently use in the clinic.

Promotor: C.A.M.J.J. van den Hondel, Co-promotor: Sandra de Weert

Biological cells, the basic building blocks of all life forms, are surrounded by a lipid membrane. More than half of the membrane is occupied by membrane proteins, which can regulate the cell functionality through specific arrangements.

The redox-conversion reaction of metal-disulfide and metal-thiolate complexes are important, as they may shed light on electron-transfer reactions that often occur in Nature.

The overarching goal of this thesis is to set the foundations, but also make the first essential steps towards establishing a comprehensive, mesoscopic, hydrodynamic theory of epithelial tissues. The stage is set by an exhaustive study of topological defects in passive p-atic liquid crystals, singularities…

A management strategy has been developed for field margins to reduce pesticide drift to non-target areas and to promote biodiversity on arable land. To this end, 3 and 6 m wide strips along the edges of winter wheat, sugar beet and potato crops have been left unsprayed with herbicides and insecticides…

Promotor: Jelle S. Kaastra Co-promotor: Jelle de Plaa

OB associations are loose groups of young, massive stars. They constitute the last stage of the massive starformation process, and the context in which new stars are formed.

The aim of the research presented in this thesis was to develop new methods forchallenging systems in liquid-state NMR using paramagnetic effects generated by thetwo-armed probe CLaNP-5.

I have studied the hot, diffuse gas around and between galaxies. Specifically, I have used the EAGLE numerical simulations of galaxy formation to predict the properties of this gas, and I have used those properties to predict specific observables: soft X-ray absorption and emission lines.

My PhD project studies how the temporally sequential Hox gene expression is regulated during head-tail patterning of the frog embryo.