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Het huwelijksvermogensrechtelijk statuut van kansspelwinsten: wie niet waagt (in het bewijs), die niet wint
No full textstatus: Published onlin
Samenwonen versus Huwelijk: Mechanismen en dynamiek
No full textAs cohabitation becomes an increasingly common family arrangement, it is essential to understand how family structure interacts with economic incentives and policy design, particularly since economic analysis has traditionally centered on marriage despite the observed behavioral differences between cohabiting and married couples. This dissertation addresses two central questions. First, what drives individuals to choose between cohabitation and marriage, and how do changes in these factors affect family structure and outcomes such as female labor supply and household specialization patterns? Second, what do the different characteristics and behaviors between cohabiting and married couples imply for the impact of public policies?
To answer these questions, this thesis presents three interconnected chapters that examine the interplay between family structure, cultural factors, and public policy through complementary analytical frameworks. The first chapter explores how religiosity and education influence the division of labor within households, establishing theoretical and empirical foundations for understanding how cultural and economic factors jointly shape relationship choices and time allocation. The second chapter quantifies the relative importance of several different mechanisms through which religiosity influences household outcomes, shedding light on the role of cultural factors in marital choices and specialization, as well as the potential implications of demographic change. Finally, the third chapter turns to policy, analyzing how the value and impact of social safety net programs vary across household types and highlighting the importance of considering household diversity when designing and evaluating policies.status: Publishe
Optimal Pooling in a Peer-to-Peer Framework: Exploring Risk-Sharing, Self-Protection, and Moral Hazard
No full textPeer-to-peer insurance models, that jointly incorporate the forms of centralized insurer's underwriting and decentralized peers' risk sharing, are emerging. Under these innovative risk sharing forms, the risk is separated into two layers: the first below-deductible part is shared within a community, and the second above- deductible loss, exceeding the community's risk-bearing capacity, is covered by an insurer. In this project, we plan to investigate the primary feature of peer-to-peer insurance from the perspective of risk-averse participants, such as the existence and closed-form expression of optimal deductible, join willingness of participants, moral hazard, etc.status: Publishe
Ecofysiologische modellering van vruchtontwikkeling voor slimme digitale tuinbouwtoepassingen
No full textIn Belgium, tomatoes are grown in technologically advanced greenhouses assuring appropriate growth conditions throughout the year. Thanks to these well-maintained conditions, combined with cultivars with indeterminate growth, Belgium and the Netherlands produce the highest mass of tomatoes per area among all countries. However, in practice, the production combines rigorous cultivation procedures subject to practical constraints. Exact temperature ranges are set, but usually maintained only for one reference point in the greenhouse, leaving conditions in other areas unaccounted for. Plant morphology is managed to certain specifications, though without explicit connection to fruit growth in varying growth conditions. Fruit is harvested based on visual inspection but without a systematic approach to assess the precise developmental stage for optimal harvest timing.
Mathematical models provide a valuable tool to address these gaps, enabling simulations of plant growth, water use, and fruit development under diverse scenarios. Such models have been widely established for agricultural and horticultural crops and aim to replicate real-world system behaviour. Models of tomato growth and development exist, covering various physiological phenomena. However, these models focus mostly on subprocesses (e.g., transpiration, photosynthesis), with integrative approaches being rare. Furthermore, available models are usually developed and tested only on certain parts of the season, lacking the integration of dynamic plant structure in combination with variable growth conditions during the year. The main goal of this thesis was to advance predictive models for estimating tomato fruit growth in varying environmental conditions, with a focus on understanding fruit development under different temperature regimes.
First, we analysed spatial variation in temperature and vapour pressure deficit within a commercial greenhouse setting. We characterized and examined the identified horizontal microclimate across different time scales and assessed the impact of microclimate on plant growth, yield, and quality, with an emphasis on quantifying and statistically testing the impacts compared to the assumption of uniform conditions.
Next, we developed a comprehensive mathematical model for calculating stem water potential in tomato plants. This model integrates growth dynamics, environmental conditions, and plant management strategies to enhance the accuracy of water potential estimation throughout the tomato plant canopy. Environmental factors, including temperature, relative humidity, and light irradiance, were represented at the plant compartment level, enabling precise microclimate differentiation. The model accounts for plant developmental stages and simulates water flows and stem water potential using a hydraulic resistance framework. Four hypothetical scenarios were analysed to evaluate the effects of different management practices and climate change.
Subsequently, we introduced an integrated approach to predicting fruit ripening initialisation based on fruit growth. A generic ripening activation function was developed using the relative derivative of fresh mass change to trigger the initialisation of climacteric ripening as characterised by the change of quality attributes. The model parameterisation was crop-specific yet universally applicable across diverse growth conditions and fruit growth dynamics. Initially developed for tomato, the model was further tested on three additional crops - kiwifruit, apple, and pear.
Finally, we present a virtual tomato, integrating the mechanistic fruit growth model for tomato with the previously developed plant growth model and the ripening initialisation model. This integrated model incorporates plant management strategies and accounts for microclimate variations throughout the plant structure, building on findings from the first part. Additionally, the mechanistic fruit growth model was enhanced with a submodel for fruit growth during the cell division phase, enabling a more accurate estimation of the initial fruit mass. The calibrated virtual tomato was applied to predict yield and fruit maturity throughout the growing season, providing insight into integrative modelling methods as a potential tool for analysing and optimising tomato production.
This thesis provided significant advancements in understanding and predicting tomato growth and fruit development under varying environmental conditions. By integrating detailed models of plant hydraulics, fruit growth dynamics, and ripening processes, the research offers a more comprehensive representation of tomato physiology. The inclusion of microclimate effects, plant management practices, and variable environmental conditions ensures that the models better reflect real-world growing conditions, enhancing their relevance for both research and practical applications. Models such as the one presented here hold a potential practical value by aiding growers in improving yield prediction, monitoring fruit development, and refining growth strategies. However, challenges persist, including expanding the models to incorporate broader physiological interactions to enhance their adaptability to a wider range of environmental conditions and adapting them across different cultivars. Future research should also focus on integrating these models into precision agriculture systems, by incorporating real-time data and advanced monitoring technologies into digital twins for even greater accuracy and efficiency in tomato production.status: Publishe
The Latin Translation of Hebrew Idiomatic Expressions in Jerome’s Psalterium iuxta Hebraeos
No full textstatus: Accepte
CLARIN in CLARIAH-VL+: Plans for 2025-2028
No full textsponsorship: Fonds Wetenschappelijk Onderzoek|I001525Nstatus: Published onlin
Rechterlijke onafhankelijkheid in benoemingsprocedures voor rechters van het Gerecht: een carte blanche voor de nationale selectiefase van de drieledige benoemingsprocedure? Zaak C‑119/23, Virgilijus Valančius
No full textstatus: Publishe
Effectiveness of <i>Ensifer meliloti</i> as beneficial microorganism depends on barley's genotype and specific environmental factors
No full textsponsorship: This work was supported by the Federal Ministry of Education and Research (BMBF), Projekttrager Julich (PtJ), PrimedPlant-1 project, grant number 031B0196B to AS and KS; PrimedPlant-2 project, grant number 031B0886B to AS and KS, and PrimedPlant-3 project, grant number 031B1304B to AS. (Federal Ministry of Education and Research (BMBF), Projekttrager Julich (PtJ), PrimedPlant-1 project|031B0196B, PrimedPlant-2 project|031B0886B, PrimedPlant-3 project|031B1304B)status: Published onlin
Dada’s Smile: Erwin Blumenfeld’s Dada-Chaplinist Montages
No full textsponsorship: Research Foundation - Flanders (FWO)|11PDU24Nstatus: Accepte
