Het onderzoekscluster ‘International Organisation’ maakt deel uit van het onderzoeksprogramma ‘Institutions, Decisions and Collective Behaviour’. De onderzoekers in dit cluster bestuderen de oorsprong, opzet, effecten en competitie over de normen, regels, instituties en formele organisaties die grensoverschrijdend…

Binnen het onderzoeksprogramma ‘Institutions, Decisions and Collective Behaviour’ richt het onderzoekscluster ‘Politics in the Netherlands’ zich op de Nederlandse politiek. De onderzoekers bestuderen de opzet en het functioneren van de politieke instituties en kijken naar de attitudes en het gedrag…

Hoe reageren de Afrikaanse landen Mali, Nigeria en Mozambique op gewapende jihadistische groeperingen in Afrika? Zien we verschillende patronen in repressie door de staat, weerstand van de gemeenschap en, in samenhang daarmee, de veiligheidssituatie in deze landen?

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Het Quantum Delta NL-programma, waaraan de Universiteit Leiden deelneemt, krijgt 615 miljoen euro uit het Nationaal Groeifonds om Nederland te ontwikkelen tot een koploper in quantumtechnologie. Dit werd vandaag bekend gemaakt bij de presentatie van de winnende voorstellen in Den Haag.

Lezing

This thesis covers various applications of topology in condensed matter physics and quantum information.

In this thesis, topics relating to the optimization of high-throughput pipelines used for imaging are discussed. In particular, different levels of implementation, i.e., conceptual, software, and hardware, are discussed and the thesis outlines how advances on each level need to be made to make gains…

This thesis advances automata learning, a key area in computer science, with applications in software verification, biological analysis, and autonomous technologies. It explores three main themes: first, it introduces a passive learning algorithm for generating compact probabilistic models from positive…

This thesis is is made of three parts. The first part describes a generalization of the Chabauty's method, that can be used to determine the rational points of a curve such that s+g>r+1, where g is the genusof the curve, r is the rank of the Mordell-Weil group of the jacobian of the curve and s is…

Uncertainty and noise are frequently-encountered obstacles in real-world applications of numerical optimization. The practice of optimization that deals with uncertainties and noise is commonly referred to as robust optimization.

Automated Machine Learning (AutoML) is widely used to automatically build a suitable practical Machine Learning (ML) model for an arbitrary real-world problem, reducing the effort of practitioners in the ML development cycle for real-world applications. Optimization is a key part of a typical AutoML…

Promotor: Prof.dr. M. Ubbink

Promotieonderzoek is veeleisend en belonend. Of het nu gaat om een stap in je academische carrière of om de laatste fase in je universitaire opleiding, promotieonderzoek vereist denkkracht, creativiteit en doorzettingsvermogen. Het Instituut Politieke Wetenschap biedt je een professionele en ondersteunende…

Het Instituut Politieke Wetenschap heeft een zeer divers onderzoeksprogramma. Dit programma dient twee doelen: het bevorderen van de eenheid van het Instituut als een intellectuele gemeenschap van sociale wetenschappers en politicologen en om collega’s met overlappende interessegebieden in staat te…

Software development is a complex process. It is important that software products become stable and maintainable assets.

CMLCA is a software tool that supports the technical steps of the Life Cycle Assessment. The focus of the program is on advanced computational aspects of life cycle inventory calculations.

IoT technology poses serval opportunities to supply chains. This thesis employs grey correlation and forecasting models, system dynamics, agent-based modeling, and ex-ante LCA to investigate and quantify the opportunities and risks of IoT-enabled sustainable supply chain operations from both industrial…

There is an increasing amount of attention on EU and its Member States contributions to implementation of two landmark agreements: the Paris Climate Agreement and the UN Agenda 2030 with Sustainable Development Goals (SDGs). Absent from the current literature is an analysis of the political effect of…

Teaching the Future: AI-Enhanced Education for Student Engagement and Ethical Learning.

The use of increasingly large and diverse datasets to guide urban climate action has implications for how, and by whom, local governments are held accountable.

Publicaties die voortkomen uit het AFITE-project

Optimization tasks in practice have multifaceted challenges as they are often black box, subject to multiple equality and inequality constraints and expensive to evaluate.

Promotor: F. Arbab

The unit residue group, to which the present thesis is devoted, is defined using the norm-residue symbol, which Hilbert introduced into algebraic number theory in 1897.

Algoritmen ontwerpen is een van de onderzoeksonderwerpen waar Leiden sterk in is. Want supercomputers moeten niet alleen gebouwd worden, maar ook geprogrammeerd. Wetenschappers van internationale faam doen hier onderzoek naar.

Systems are called real-time systems, if the correctness of the system does not only depend on the correctness of the system output but also on whether the output is delivered on time.

Predictive maintenance (PdM) is a maintenance policy that uses the past, current, and prognosticated health condition of an asset to predict when timely maintenance should occur.

In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

Promotor: T. Hankemeier, Co-Promotores: T. Reijmers, L. Coulier

In 2018, the number of mobile phone users will reach about 4.9 billion. Assuming an average of 5 photos taken per day using the built-in cameras would result in about 9 trillion photos annually.

Promotor: Prof.dr. K.J. Batenburg

The next generation of high-contrast imaging instruments on space-based observatories requires sophisticated wavefront sensing and control in addition to a high-performance coronagraph.

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.

Promotor: Prof.dr. S.F. Portegies Zwart

It is a common technique in global optimization with expensive black-box functions to learn a surrogate-model of the response function from past evaluations and use it to decide on the location of future evaluations.

A common method to solve expensive function evaluation problem is using Bayesian Global Optimization, instead of Evolutionary Algorithms.

Promotor: Prof.dr. V. Icke, Co-Promotor: T.I. Madura

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.

Sewer pipes are an essential infrastructure in modern society and their proper operation is important for public health. To keep sewer pipes operational as much as possible, periodical inspections for defects are performed.

Promotores: C. J. ten Cate; M. A. Ainslie. Co-promotor: W. Slabbekoorn

With the help of quantum mechanics, digital quantum hardware may be able to tackle some of the problems that are too difficult for ordinary computers. But despite these expectations and the ongoing effort of the research community, reliable quantum computers are not yet realized in a lab setting.

De onderzoeksgroep Business, Technology & Public Policy van de afdeling Bedrijfswetenschappen van Universiteit leiden houdt zich bezig met het onderzoeken van de dynamische wisselwerking tussen ‘nieuwe’ technologieën en de verschillende belanghebbenden die hiermee interacteren, waaronder consumenten,…

Promotores: Prof.dr. T.H.W. Bäck, Prof.dr. M.R.V. Chaudron, Co-Promotor: M.T.M. Emmerich

On a structural level, the properties featured by a majority of mechanical metamaterials can be ascribed to the finite number of soft internal degrees-of freedom allowing for low-energy deformations.

In design optimization problems, engineers typically handcraft design representations based on personal expertise, which leaves a fingerprint of the user experience in the optimization data. Thus, learning this notion of experience as transferrable design features has potential to improve the performance…

Over several decades, a variety of computational methods for drug discovery have been proposed and applied in practice. With the accumulation of data and the development of machine learning methods, computational drug design methods have gradually shifted to a new paradigm, i.e. deep learning methods…