324 zoekresultaten voor “some problemen” in de Publieke website
-
X-raying extragalactic gas: warm-hot gas in the EAGLE simulations
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.
-
Role of near-surface environment in tuning electrochemical CO2 reduction reaction and H2 evolution reaction
This thesis has shed light on some of the ways in which the local electrolyte composition can differ from the bulk and how these changes in the local reaction environment can determine the activity and/or selectivity of two important electrocatalytic reactions, namely, electrochemical CO2 reduction…
-
Knowledge extraction in the quantum random-oracle model
The aim of this thesis is to present novel techniques for proving cryptographic schemes secure against quantum adversaries. Most results are within the context of an idealized model called the ‘quantum random-oracle model’.
-
Policy Review on Decoupling
Development of indicators to assess decoupling of economic development and environmental pressure in the EU-25 and AC-3 countries.
-
Chemicaliën een groter probleem dan klimaatverandering? Martina Vijver waarschuwt in podcast BNR
In de podcast ‘Duurzaam’ van BNR legt hoogleraar Ecotoxicologie Martina Vijver uit wat de schadelijke gevolgen van chemicaliën zijn. Met de grote hoeveelheden die nu in de natuur terechtkomen, kan dit uitgroeien tot de volgende grote milieucrisis.
-
Peuters vaker agressief door afwijkende werking zenuwstelsel en problemen zwangere moeder
Jonge kinderen vertonen meer agressief gedrag als hun zenuwstelsel niet adequaat reageert op stresssituaties en ze tijdens de zwangerschap zijn blootgesteld aan risicofactoren als roken of psychische problemen van de moeder. Dat concludeert promovendus Jill Suurland. Promotie op 4 juli.
-
Positioning of current Environmental tools & an outlook to the future
Review of new technical decisionsupport systems in the environmental field, and application in water management decission processes.
-
Pesten op het werk heeft een duidelijke relatie met mentale problemen
Bart Verkuil en Marc Molendijk hebben in een uitgebreide analyse de gevolgen van pesten op het werk op angst, depressie, en burn-out in kaart gebracht. De twee Leidse klinisch psychologen publiceren erover in het online wetenschappelijk tijdschrift PLOS ONE.
-
Wereldwijde problemen, lokale acties: Leidse onderzoekers zorgen voor meer bewustwording over milieuvraagstukken
In 2021 hebben Thijs Bosker en Paul Behrens – hoofddocenten Milieuwetenschappen aan de Universiteit Leiden – financiering ontvangen van het Leids Universiteits Fonds en de Gratama Stichting om tastbare en praktische oefeningen te ontwikkelen die mensen helpen om milieuproblemen vanuit een lokaal perspectief…
-
On topological properties of massless fermions in a magnetic field
Make more fluid: In condensed matter systems, electrons can acquire unusual properties from their interaction with the atomic lattice.
-
Onderwijs
De Universiteit Leiden biedt een specifieke masteropleiding die kolonialisme en slavernij behandelt.
-
Decompositions in algebra
We show that Kirchhoff ’s law of conservation holds for non-commutative graph flows if and only if the graph is planar. We generalize the theory of (Euclidean) lattices to infinite dimension and consider the ring of algebraic integers as such a lattice.
-
Control of early plant development by light quality
This thesis describes how different colours of light affect various aspects of the growth and development of Arabidopsis and tomato plants.
-
Translational Symmetry Breaking in Holographic Strange Metals
In this thesis, we have used numerical approaches to study the effects of translational symmetry breaking on strange metallic systems as realised by the holographic duality.
-
On Multifield Inflation, Adiabaticity and the Speed of Sound of the Curvature Perturbations
Promotor: A. Achúcarro, Co-Promotor: G.A. Palma
-
Studying through the summer?
Leiden University offers a unique range of summer courses where you can broaden or deepen your knowledge or share your expertise with fellow students. The choice of academic courses is very diverse, ranging from Law, Big Data, Languages and Linguistics to Maths and Natural Sciences, Biology, Biomedical…
-
Design, synthesis, and evaluation of antigenic peptide conjugates containing Toll-like receptor agonists
This thesis describes the design, synthesis, and immunological evaluation of varying (neo)antigenic peptide conjugates containing either a TLR2 or a TLR7 agonist.
-
Spectroscopy of two-field inflation
This thesis is about cosmological inflation and its relation to observations.
-
Kummer theory for commutative algebraic groups
This dissertation is a collection of four research articles devoted to the study of Kummer theory for commutative algebraic groups.
-
Counting curves and their rational points
n this thesis we study curves. In the first half, we study moduli spaces of curves and Gromov-Witten invariants, certain kinds of curves counts. We employ logarithmic geometry for this.
-
Zijn transitcentra slechts een oplossing voor een Duits politiek probleem of tevens voor het migratievraagstuk?
In Duitsland is momenteel een regeringscrisis afgewend, maar daarmee is het Europese migratievraagstuk nog niet opgelost. Er zijn nieuwe transitcentra aan de grens, maar deze lijken eerder het ‘failliet van Dublin’ te tonen dan dat er een stap voorwaarts wordt gemaakt.
- Position paper: Impact of COVID-19 on Young Academics
- Position paper: Impact of COVID-19 on Young Academics
-
Vormt het nieuwe EU-migratiepact een oplossing voor de fundamentele problemen?
Een doorbraak in het migratiedossier na jarenlange onderhandelingen tussen lidstaten en het Europese Parlement. Wat houdt dit precies voor Nederland in? Mark Klaassen, universitair docent Immigratierecht, hierover aan het woord in diverse media
-
Rebekah Tromblé
Students Practicing Citizen Journalism
-
Cities, migration and global interdependence 1350-2000
The research programme Cities, Migration and Global Interdependence 1350-2000 (CMGI) focuses on urbanisation, migration, and economic development in a comparative and global context.
-
Exposure and health Assessment of Persistent Organic Pollutants (POPs) at e-waste recycling site among workers in the informal sector in Nigeria
Do e-waste workers display enhanced effects of adverse health effects due to informal e-waste processing in Nigeria? Is there a difference between the health outcomes of the exposed and the control groups? Are there difference in health effects within and between job groups (collectors, dismantlers,…
-
Volatile compounds from Actinobacteria as mediators of microbial interactions
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.
-
Electronic spectroscopy of molecules of astrophysical interest
This thesis revolves around the electronic spectroscopy of molecules in the laboratory and the search for the carriers of the diffuse interstellar bands (DIBs).
-
Zebrafish embryos and larvae as a complementary model for behavioural research
Promotor: Prof.dr. M.K. Richardson
-
Small scale kinematics of massive star-forming cores
Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: M.R. Hogerheijde
-
The urge to collect
Where does the urge to collect come from? What are the explicit or underlying reasons for gathering large amount of objects?
-
Inferno Worlds
A remarkable population of short period transiting rocky exoplanets with equilibrium temperatures on the order of 2,000 K has recently been discovered.
-
Shining Light on PAHs in Space
Polycyclic aromatic hydrocarbons (PAHs) are the most abundant class of organic compounds in space. The PAH field evolves from the constant interaction between experimentalists, theorists, modellers and observers. While laboratory research and quantum chemical calculations together set up the molecular…
-
HEPGAME
HEPGAME is a research project that combines the world’s fastest computer algebra system for High Energy Physics equations, FORM, with insights from artificial intelligence. The name combines High Energy Physics and Games.
-
Far from home: the science exploitation of the fastest Milky Way stars
The Sun and all the stars in the night sky reside in the Milky Way galaxy. In the at-rest reference frame of the Galaxy, typical stars travel with velocities of about 100-200 kilometres per second.
-
Off the wall: characterisation and exploitation of a cell wall deficient life style in filamentous actinomycetes
Almost all bacteria are enveloped by a cell wall that provides cellular protection.
-
Steps in gas-surface reactions
Heterogeneous catalysis is essential to many industrial applications. These catalysts are often comprised of supported nanoparticles, which contain various different surface sites.
-
Bayesian learning: challenges, limitations and pragmatics
This dissertation is about Bayesian learning from data. How can humans and computers learn from data?
-
Measures and Matching for Number Systems
This thesis provides explicit expressions for the density functions of absolutely continuous invariant measures for general families of interval maps, that include random maps and infinite measure transformations, not necessarily number systems.
-
Infrared spectroscopy of astrophysically relevant hydrocarbons
This thesis is about the study of hydrocarbons via infrared spectroscopy.
-
Universal adelic groups for imaginary quadratic number fields and elliptic curves
Promotor: Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Univ. de Bordeaux)
-
Next generation bacitracin: reimagining a classic antibiotic
Given the accelerating appearance of antimicrobial resistance, there is an urgent need for more fundamental research into novel antibiotic strategies. The work in this thesis helps to address this global problem by developing new antibiotic compounds, inspired by the antibacterial mechanisms of the…
-
Plant occurrence in space and time: the importance of land use, habitat structure, and pollination mode
Plant diversity is essential for us and our planet as it sustains the stability of our ecosystems, provides vital materials and food to us and supports many ecosystem services.
-
The power of one qubit in quantum simulation algorithms
Quantum computing is an emerging technology, which holds the potential to simulate complex quantum systems beyond the reach of classical numerical methods.Despite recent formidable advancements in quantum hardware, constructing a quantum computer capable of performing useful calculations remains challenging.In…
-
Adaptive responses to environmental changes in Lake Victoria cichlids
Promotor: M.K. Richardson, Co-Promotor: F. Witte
-
Insights from scanning tunneling microscopy experiments into correlated electron systems
This thesis presents insights from our study of various correlated electron systems with a scanning tunneling microscope (STM). In ordinary metals, electron-electron interactions exist, but get substantially screened due to the sheer number of electrons.
-
Taxonomy, systematics, and biogeography of Ficus subsection Urostigma (Moraceae)
Promotor: Prof.dr. P.C. van Welzen
-
Photocatalytic redox reactions at the surface of liposomes
Promotor: Prof.dr. E. Bouwman, Co-promotor: S. Bonnet
-
Radio galaxies near the epoch of reionisation
This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.