134 research outputs found
Two types of rental system? An exploratory empirical test of Kemeny's rental system typology
No full textThe organisation of the rental market varies from country to country. Kemeny draws a distinction between societies with an integrated rental system (relatively minor differences between the non-profi t and the profi t rental sectors) and societies with a dualist rental system (relatively major differences between the non-profi t and the profi t rental sectors). In this exploratory paper, Kemeny’s typology is tested against data from the European Community Household Panel (ECHP). The tentative conclusion is that integrated rental systems and dualist rental systems do indeed exist, but there are signs of increasing convergence between the two.OTB Research Institut
Schema furfuralbreiding uit landbouwafvalproducten
No full textDocument(en) uit de collectie Chemische ProcestechnologieDelftChemTechApplied Science
A Solution of the Two-Capacitor Problem Through its Similarity to Single-Electron Electronics
No full textThe purpose of this paper is to investigate the two-capacitor paradox using circuit models developed in the analysis of circuits that include nanoelectronic single-electron tunneling devices. The two-capacitor paradox, in which it seems that energy is not conserved in a simple circuit consisting of two capacitors in parallel separated by an ideal switch, is resolved by applying linear circuit theory utilizing a current—described by a (Dirac) delta function—and stepping voltages across all three elements. Based on a similar description, successfully used for tunneling of electrons through metal junctions in nanoelectronics, the switch is modeled as a device across which—upon closing—the voltage steps down while the current through it is an impulse. The model distinguishes three intervals in describing the ideal switch: t < 0, t = 0, and t > 0. As a consequence, the ideal switch dissipates energy during the switching action at t = 0 in zero time. Although the solution of the two-capacitor problem looks like a theoretical curiosity, the application of nanoelectronic concepts allow a physical explanation based on electron tunneling; it shows that the ideal switch is best described by the tunneling of many electrons. In such a context, some of those electrons loose energy and the v-i characteristic shows Ohm’s law.Electrical Engineering Educatio
Interviewen
No full textInterviewen is een veelvoorkomende wetenschappelijke methode on informatie teverzamelen. Belangrijk is dat het interview inhoudelijk goed aansluit bij jouwontwerpopgave of onderzoek. Daarnaast helpt het enorm om te werken met eensystematische aanpak bij het vastleggen, ordenen, analyseren en rapporteren vande informatie uit je interviews. En natuurlijk is een goede gespreksvoorbereidingbelangrijk. De interviewmethode omvat drie fasen:1. Voorbereiding en randvoorwaarden2. Uitvoering, gespreksvoering en vastleggen data, en3. Uitwerking, analyse en rapportage.Interviews zijn zeer geschikt voor het in kaart brengen van percepties, ervaringen,opvattingen, verwachtingen, en het ophalen van kennis uit de praktijk. Om decomplexiteit van datgene wat je onderzoekt te begrijpen, is het van belang dat je inhet interview zelf flexibel kunt opereren. Gesprekken verlopen nog al eens andersdan tijdens de voorbereiding wordt verondersteld. Dit hoofdstuk biedt concretehandvaten voor alle onderdelen van het proces.Urban StudiesSpatial Planning and Strateg
Comparing Room Acoustics Simulation Tools: Dataset for Reproducing and Expanding the Results
No full textThis is the database connected to the paper Dijkman, L., Hoekstra, N. and Hornikx, M. Comparing Open-Source Room Acoustics Simulation Tools: Performance and Usabillity Insights (2025). This database contains the following information: Simplified room geometries for Complex Room 2 (CR2) and Complex Room 4 (CR4) from the Benchmark for Room Acoustical Simulation (BRAS). Material data (absorption, scattering and approximated reflection coefficients) for all materials in both rooms. Source and receiver positions (x, y, z) according to the simplified room models. All simulation results for the simulation tools used in the research. Scripts for post processing of the results. For an overview of all research on open-source simulation tools for room acoustics conducted by the TU/e Building Acoustics group, see: https://github.com/Building-acoustics-TU-Eindhoven/OSS_RoomAcoustics References @techReport{Aspo2020, author = {Lukas Aspöck and Michael Vorländer and Fabian Brinkmann and David Ackermann and Stefan Weinzierl}, doi = {10.14279/depositonce-6726.2}, institution = {RWTH Aachen}, keywords = {Room acoustic simulation,acoustic modeling,virtual acoustic}, title = {\{B\}enchmark for \{R\}oom \{A\}coustical \{S\}imulation (\{BRAS\}) - \{D\}ocumentation of the database}, year = {2020}} @article{Mond2020, author = {Boris Mondet and Jonas Brunskog and Cheol Ho Jeong and Jens Holger Rindel}, doi = {10.1016/j.apacoust.2019.04.034}, issn = {1872910X}, journal = {Applied Acoustics}, keywords = {Absorption coefficient,Inverse problem,Room acoustics,Surface impedance}, publisher = {Elsevier Ltd}, title = {\{F\}rom absorption to impedance: \{E\}nhancing boundary conditions in room acoustic simulations}, volume = {157}, year = {2020}} @inproceedings{Berz2017, author = {Marco Berzborn and Ramona Bomhardt and Johannes Klein and Jan-Gerrit Richter and Michael Vorländer}, booktitle = {DAGA}, title = {\{T\}he \{ITA\}-\{T\}oolbox: \{A\}n \{O\}pen \{S\}ource \{MATLAB\} \{T\}oolbox for \{A\}coustic \{M\}easurements and \{S\}ignal \{P\}rocessing}, year = {2017}
Multi-storey timber-frame building- modelling the racking stiffness of timber-frame shear-walls
No full textToday, timber structures are receiving attention more and more. Because of the increasing interest in sustainable construction as well as for other reasons, building industry in Europe is (re)-discovering multi-storey timber structures for construction of mid-rise buildings. In this master’s thesis, an analytical calculation method and modelling approach are presented, to calculate the timber-frame shear-wall racking stiffness. With the research, a specific gap in engineers knowledge is completed, and a contribution is made to the development of multi-storey timber-frame structures in the Dutch context of building engineering.Structural and Building EngineeringStructural EngineeringCivil Engineering and Geoscience
Investigating the effect on ATFM delays of changing the T-DPI-s horizon for regulated flights
No full textAs aviation recovers to pre-pandemic levels large amounts of Air Traffic Flow Management delay also return, as the traffic at airports and in airspaces reaches their old levels. These delays have a yearly cost of around 500 million euros in the European Civil Aviation Conference area and are detrimental to the experience of passengers. This paper proposes a change in the interaction between the A-CDM process at Schiphol and EUROCONTROL's Network Manager, varying at what point the slot improvement process for regulated flights is stopped; providing more transparency in the network with this change. The resulting change in ATFM delay is investigated by modelling these two systems and freezing the slots at a set time, using historical input data to accurately model the turnaround process. The results generated using the described methods are inconclusive. More data and an additional implementation of using the CTOTs calculated by the model in the simulated turnaround are needed in order to make statistically sound conclusions on whether changing the T-DPI-s horizon has any effect. Nevertheless, this paper still presents insights and a novel framework for continued research into the subject.Aerospace Engineerin
Distinct spatiotemporal dynamics of CD8<sup>+</sup> T cell-derived cytokines in the tumor microenvironment
No full textCells in the tumor microenvironment (TME) influence each other through secretion and sensing of soluble mediators, such as cytokines and chemokines. While signaling of interferon γ (IFNγ) and tumor necrosis factor α (TNFα) is integral to anti-tumor immune responses, our understanding of the spatiotemporal behavior of these cytokines is limited. Here, we describe a single cell transcriptome-based approach to infer which signal(s) an individual cell has received. We demonstrate that, contrary to expectations, CD8+ T cell-derived IFNγ is the dominant modifier of the TME relative to TNFα. Furthermore, we demonstrate that cell pools that show abundant IFNγ sensing are characterized by decreased expression of transforming growth factor β (TGFβ)-induced genes, consistent with IFNγ-mediated TME remodeling. Collectively, these data provide evidence that CD8+ T cell-secreted cytokines should be categorized into local and global tissue modifiers, and describe a broadly applicable approach to dissect cytokine and chemokine modulation of the TME.Pattern Recognition and Bioinformatic
Comparative evaluation of plasma biomarkers of Schistosoma haematobium infection in endemic populations from Burkina Faso
Get PDFInfection with Schistosoma haematobium causes urogenital disease associated with organ disfunction, bleeding, pain, and higher susceptibility to infections and cancer. Timely and accurate diagnosis is crucial for prompt and appropriate treatment as well as surveillance efforts, and the use of plasma biomarkers offers important advantages over parasitological examination of urine, including increased sensitivity and the possibility to use the same specimen for multiple investigations. The present study aims to evaluate the diagnostic performance of different plasma biomarkers in endemic populations from Burkina Faso, West Africa. Schistosoma spp. Circulating Anodic Antigen (CAA), cell free S. haematobium DNA (cfDNA), class M and G antibodies against S. haematobium Soluble Worm Antigen Preparation (SWAP) and Soluble Egg Antigen (SEA) were measured in 406 plasma samples. Results of each biomarker test were compared to those of CAA, a Composite Reference Standard (CRS) and Latent Class Analysis (LCA). An identical proportion of positive samples (29%) was observed as a result of CAA and cfDNA testing, with a substantial agreement (84%, Cohen k = 0.62) between the results of the two tests, and a comparable agreement with the results of CRS and LCA. A higher positivity was observed, as expected, as a result of specific antibody testing (47%-72%), with IgG showing a higher agreement than IgM with the three references. Also, higher IgG levels were observed in current vs past infection, and ROC analysis identified optimal cutoff values for improved testing accuracy. This study provides compelling evidence that can inform the choice of the most appropriate diagnostic plasma biomarker for urogenital schistosomiasis in endemic areas, depending on the purpose, context, and available resources for testing. Either CAA or cfDNA testing can be used for the diagnosis of patients and for epidemiological investigations, even in absence of urine filtration microscopy, whereas anti-SWAP or anti-SEA IgG can be employed for surveillance and integrated monitoring of control interventions against poverty-associated diseases
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