2,754 zoekresultaten voor “complex systems” in de Publieke website
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Learning class-imbalanced problems from the perspective of data intrinsic characteristics
The class-imbalance problem is a challenging classification task and is frequently encountered in real-world applications. Various techniques have been developed to improve the imbalanced classification performance theoretically and practically.
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An Algebra for Interaction of Cyber-Physical Components
Modeling and analysis of cyber-physical systems are still challenging. One reason is that cyber-physical systems involve many different parts (cyber or physical), of different nature (discrete or continuous), and in constant interaction via sensing and actuating.
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Population size fails to explain the evolution of complex culture
The logic seems inescapable indeed. The bigger the population, the higher the probability it contains an Einstein. Hence, bigger populations are more likely to develop complex culture.
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Mast cells as immune regulators in atherosclerosis
Cardiovascular syndromes are the major cause of death in Western societies.
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Zipping into Fusion
Promotor: Prof.dr. J.G.E.M. Fraaije, Co-promotor: A. Kros
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‘Mensenrechten’ voor bedrijven die oneerlijke prijsafspraken maken?
Het mededingingsrecht zorgt ervoor dat bedrijven op een eerlijke wijze concurreren. De Nederlandse Autoriteit Consument & Markt (ACM) handhaaft het mededingingsrecht in Nederland en kan bedrijven die oneerlijk concurreren bestraffende en herstellende maatregelen opleggen. Deze bedrijven hebben, wanneer…
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Molecular and Nano-Engineering with Iron, Ruthenium and Carbon: Hybrid structures for Sensing
Metal complexes and 2D materials like graphene were combined to produce structures that can function as sensors.
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Solving the Gravitational N-body Problem with Machine Learning
In this work, I explore the creation of new methods that optimize simulations of the gravitational N-body problem. Specifically, I take advantage of the recent popularity of Machine Learning methods to find tools that can suit this problem.
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Dynamics of the Oort Cloud and Formation of Interstellar Comets Santiago Torres Rodriguez
The solar system was formed approximately 4.56 billion years ago. Despite the numerous theories that have been developed over the years, the formation and evolution of the solar system still remain unclear.
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Exploring strange new worlds with high-dispersion spectroscopy
Until the 1990s, the only known planets were those in our Solar System. Three decades later, several thousand exoplanets have been discovered orbiting stars other than the Sun, and substantial efforts have been made to explore these strange new worlds through spectroscopic analyses of their atmosphe…
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A brain-wide map of neural activity during complex behaviour
Een belangrijke uitdaging in de neurowetenschappen is het begrijpen hoe neuronen in honderden onderling verbonden hersengebieden sensorische input integreren met eerdere verwachtingen om bewegingen te initiëren en beslissingen te nemen.
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Charge transport properties of Ru-complex molecules: the influence of humidity
I will give a general introduction to the field of molecular electronics, its history, methods and challenges. I will also introduce the subject of my investigation and provide a brief outlook to the remainder of our thesis.
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Inextricable ties between chemical complexity and dynamics of embedded protostellar regions
Promotor: E. F. van Dishoeck, Co-promotor: C. Walsh
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Isogeny graphs, modular polynomials, and applications
This thesis has three main parts. The first part gives an algorithm to compute Hilbert modular polynomials for ordinary abelian varieties with maximal real multiplication. Hilbert modular polynomials of a given level b give a way of finding all of the abelian varieties that are b-isogeneous to any given…
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Constructing elliptic curves of prescribed order
Promotor: Peter Stevenhagen
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Cell-autonomous and host-dependent CXCR4 signaling in cancer metastasis: insights from a zebrafish xenograft model
Promotor: A.H. Meijer, Co-promotor: B.E. Snaar-Jagalska
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Ignas Snellen over complex buitenaards leven
Het aantal planeten waarop complex leven kan gedijen, is kleiner dan gedacht. Beloftevolle tweelingen van de aarde blijken bij nader inzien slechts beperkt levensvatbaar, stellen astronomen. Ignas Snellen van de Leidse Sterrewacht reageert in DeMorgen op het nieuws.
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Katherine HamiltonFaculteit der Wiskunde en Natuurwetenschappen
k.l.hamilton@liacs.leidenuniv.nl | 071 5272727
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Casting light on the ƞ Carinae puzzle
Promotor: Prof.dr. V. Icke, Co-Promotor: T.I. Madura
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Diego GarlaschelliFaculteit der Wiskunde en Natuurwetenschappen
garlaschelli@lorentz.leidenuniv.nl | 071 5275510
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Bernat Durà FaulíFaculteit der Wiskunde en Natuurwetenschappen
fauli@physics.leidenuniv.nl | 071 5275465
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Julio MelioFaculteit der Wiskunde en Natuurwetenschappen
melio@physics.leidenuniv.nl | 071 5272727
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Levend of niet? Deze 3D-geprinte robotjes zwemmen en navigeren als dieren
Ze zijn maar een paar micrometer lang — veel kleiner dan de dikte van een menselijke haar. Deze microrobots zwemmen, navigeren, nemen hun omgeving waar en passen zich aan op een manier die opvallend ‘levend’ lijkt.
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Balanced lethal systems: een quick guide door Ben Wielstra
Ben Wielstra onderzoekt balanced lethal systems, waarin de helft van het nageslacht al voor de geboorte sterft. In vakblad Current Biology legt hij op toegankelijke wijze uit hoe zoiets nadeligs kan ontstaan in de natuur.
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Shielding software systems: A comparison of security by design and privacy by design based on a systematic literature review
De auteurs zoeken en beoordelen systematisch relevante definities van Security by Design (SbD) in vergelijking met Privacy by Design (PbD).
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the study of physics: An investigation of physics teachers' belief systems about teaching and learning physics
Dit proefschrift omvat vier deelstudies naar de inhoud en structuur van de opvattingssystemen van natuurkundedocenten over het leren en onderwijzen van natuurkunde in het voortgezet onderwijs (VO) in Nederland.
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Between Design and Implementation for Technology-Enhanced Learning Systems
Technologies that help to enhance our educational environments can be found everywhere.
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The LeiCNS-PK3.0 model development and applications: healthy-to-diseased CNS pharmacokinetic translation
Accurate prediction of the unbound drug concentration-time profile at the CNS target site is crucial for the assessment of the right drug concentration-effect relationship. PBPK models have supported the PK prediction of the CNS target sites and the translation of PK data between species and between…
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Towards artificial photosynthesis on the lipid bilayer of liposomes
Artificial photosynthesis has recognised potential to produce green and sustainable fuels from earth-abundant resources such as water, carbon dioxide (CO2), and sunlight.
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Formal models of software-defined networks
SDN (Software-Defined Networking) represents a revolutionary approach to network architecture that enables the dynamic and flexible management of network resources through software-based control. This dissertation introduces the idea of SDN and its southbound protocol OpenFlow, then presents the formal…
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Studies on molecular basics of metabolic syndrome in zebrafish
The research described in this thesis has, using the zebrafish as a model system, shed new light on the intricate relationship between TB and DM2, in particular on the role of leptin, SHP-1 and glucocorticoids.
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De complexiteit van Groningen en vertrouwen
Sinds de gasbevingen in Groningen worden ‘vertrouwen’ en ‘overheid’ daar niet zomaar meer met elkaar geassocieerd. Dat leverde de casus op van de Honours Class ‘Gaswinning in Groningen en het fenomeen van vertrouwen in de overheid’, waarin studenten erachter kwamen hoe complex een begrip als ‘vertrouwen’…
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Simona Demkova over Enforcement Challenges in Multilevel Regulatory Systems
Op 15 en 16 december nam Simona Demková deel aan een afsluitende conferentie en boekpresentatie van het doctorale opleidingsprogramma van de Universiteit van Luxemburg over ‘Enforcement Challenges in Multilevel Regulatory Systems – DTU REMS.
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Oogst eerste bijeenkomsten toekomst WSD-complex
De eerste ronde gebruikersbijeenkomsten heeft veel input opgeleverd voor de toekomstige Humanities Campus. Het doel: inzicht in de activiteiten die plaatsvinden in de Leer- en Werkomgeving en welke typen ontmoeting er plaatsvinden. Lees in de samenvattingen wat jouw collega’s en studenten hebben ing…
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Innate immune modulation in atherosclerosis and vascular
Promotores: Prof.dr. J. Kuiper, Prof.dr. P.H.A. Quax, Co-promotor: I. Bot
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Towards in-cell structural study of light-harvesting complexes : an investigation with MAS-NMR
Light-Harvesting Complex II (LHCII) is responsible for light absorption and excitation energy transfer in plants and photosynthetic algae, while in high light it undergoes conformational changes by which it quenches excitations to prevent photodamage.
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Not so smooth after all: resolving dust and gas structures in protoplanetary disks
A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.
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Role of non-homologous end-joining in T-DNA integration in Arabidopsis thaliana
Promotor: P. J. J. Hooykaas Co-promotor: B. S de Pater
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Facultaire opening academisch jaar: navigeren door complexiteit
De sociale wetenschappen zijn van vitaal belang bij het navigeren door complexiteiten, het bevorderen van begrip en het overbruggen van kloven. Dit werd gevierd tijdens de opening van het academisch jaar van de faculteit.
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Multi-omics studies of the control of growth and antibiotic production of Streptomyces
Actinobacteria are Gram-positive bacteria that have a complex multicellular life cycle and are well known for their ability to produce a wide range of bioactive natural products (NPs).
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Adaptive Streaming Applications: Analysis and Implementation Models
Promotor: Prof.dr. E. Deprettere
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Searching by Learning: Exploring Artificial General Intelligence on Small Board Games by Deep Reinforcement Learning
In deep reinforcement learning, searching and learning techniques are two important components. They can be used independently and in combination to deal with different problems in AI, and have achieved impressive results in game playing and robotics. These results have inspired research into artificial…
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Studenten spreken zich uit over WSD-complex
Na medewerkers en omwonenden is het nu aan studenten om hun mening te geven over het WSD-Complex. Door middel van de Evaluatie van de leeromgeving op het WSD-complex worden studenten betrokken in het verkenningsonderzoek van het WSD-complex. De evaluatie is deze week uitgezet. De resultaten worden op…
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Calculated Moves: Generating Air Combat Behaviour
By training with virtual opponents known as computer generated forces (CGFs), trainee fighter pilots can build the experience necessary for air combat operations, at a fraction of the cost of training with real aircraft.
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Integrating Analytics with Relational Databases
The database research community has made tremendous strides in developing powerful database engines that allow for efficient analytical query processing.
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Studenten over de werk- en onderwijsomgeving WSD-Complex
Naast medewerkers gaven ook studenten hun mening over het WSD-Complex. In totaal hebben 440 studenten de evaluatie ‘Werk- en onderwijsomgeving WSD-Complex’ ingevuld waarvan 37 internationale studenten. Dat is samen goed voor een betrouwbare weergave van de meningen.
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Onderzoek
Research
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WSD-Complex: de mening van onze buren
Vastgoed vroeg de omwonenden naar hun mening over het WSD-complex via de enquête woonbeleving. Nieuwsgierig naar de resultaten? Lees het bericht op de Vastgoed WSD-complex pagina.
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Metabolomics assisted with stable-isotope labeling: exploring neuronal metabolism related to Parkinson’s disease
The progressive loss and degeneration of dopaminergic neurons is a major pathological hallmark of Parkinson's disease (PD). The onset and progression of PD can be triggered by multiple risk factors, for instance, genetic mutation, environmental exposure, and aging.
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The astrochemical factory: A solid base for interstellar reactions
In this thesis chemical and physical processes in the ice mantles on interstellar dust grains are studied.