document

UV/Ozone Surface Treatment of Polymers to Enhance Their Adhesion

Poulis, J.A. (author), Kwakernaak, A. (author)

The surface treatment of plastics as well as metals or ceramics includes a thorough surface cleaning as an essential step prior to adhesive bonding and coating processes. Besides this, surface activation of polymers is often needed because their surface free energy is too low for durable adhesion of a coating or adhesive. In this chapter...

book chapter 2024

document

De impact van corona op treinreisgedrag

de Bruyn, Menno (author), van Oort, N. (author)

In maart 2020, nadat de coronacrisis ook Nederland had bereikt, startten TU Delft en NS een groots longitudinaal onderzoek onder treinreizigers (Van Hagen et al. 2021). Het onderzoek loopt inmiddels al ruim tweeëneenhalf jaar, met zeven deelonderzoeken en een achtste op komst. Menno de Bruyn (NS) en Niels van Oort (TU Delft) beschrijven hun...

journal article 2023

document

A hygiene ventilation renovation: Systematic partial engineering control for small sharing room with ceiling mixing ventilation for “corona-proof”

Cai, Wenyan (author)

Efficient local air recirculation at ceiling level promote the performance of purifiers and anti-epidemic efficiency of mixing ventilation in a small shared rooms

master thesis 2022

document

Ventilation and COVID-19 transmission risks on board of Dutch governmental ships

Boerstra, A.C. (author), Verlinde, Mark (author)

The Dutch government (specifically the ‘Rijksrederij’, the governmental shipping company) owns a fleet of just under 100 ships that are equipped to service the internal waterways and parts of the North Sea. Think in this context of e.g. Coast Guard ships, ships that help to fight oil accidents or ships that maintain buoys. Just after the COVID...

conference paper 2022

document

Working from home during the corona-crisis is associated with higher subjective well-being for women with long (pre-corona) commutes

Kroesen, M. (author)

Much research has been devoted to assessing the effect of commute duration on the subjective well-being of people, but as of yet, the respective body or research has been inconclusive as to whether there is indeed a (large) negative effect or not. To control the spread of COVID-19 governments around the world have taken unprecedented measures to...

journal article 2022

document

Ion-Boosting the Charge Density and Piezoelectric Response of Ferroelectrets to Significantly High Levels

Wang, Ningzhen (author), van Turnhout, J. (author), Daniels, Robert (author), Wu, Chao (author), Huo, Jindong (author), Gerhard, Reimund (author), Sotzing, Gregory (author), Cao, Yang (author)

In contrast to molecular-dipole polymers, such as PVDF, ferroelectrets are a new class of flexible spatially heterogeneous piezoelectric polymers with closed or open voids that act as deformable macro-dipoles after charging. With a spectrum of manufacturing processes being developed to engineer the heterogeneous structures, ferroelectrets are...

journal article 2022

document

Improving the sensitivity of piezoelectric composites by adding porosity

Rawat, Krishna (author)

Piezoelectric materials have the ability to convert mechanical to electrical energy (direct effect) and vice versa. They are readily used in the aerospace, automobile, telecommunication industry etc. as both sensors and actuators. For this work the focus is on the sensor application, which utilizes the direct piezoelectric effect. With the...

master thesis 2021

document

Defect Identification through Partial Discharge Analysis on HVDC: Partial Discharge Fingerprinting

Abdul Madhar, S. (author)

The electricity grid spanning hundreds of thousands of kms is one of the most complex man-made network built in human history. Today, after a century of growth, progress and innovation, the electricity grid is in the process of undergoing another landmark shift in its operation. The introduction of renewable energy sources, especially, offshore...

doctoral thesis 2021

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A crisis that triggered change: How the Corona crisis impacted (aspiring) homeowners’ housing preferences: A study into possible change of housing preferences of (aspiring) owner-occupiers in the Netherlands resulting from the Covid-19 crisis, as to give insight into the lasting impact on future demand for the housing stock

Bons, Marjolein (author)

The Corona crisis highly affected socio-economic circumstances, and this was expected to have changed housing preferences. Understanding what needs to be built in quality in addition to quantity is key to a sustainable housing market. Hence, this thesis researched whether and how housing preferences of (aspiring) owner occupiers in the Dutch...

master thesis 2021

document

Operating Room Scheduling during COVID-19: An advice on planning models in the Reinier de Graaf hospital

van Hartingsveldt, Tessa (author)

During the first COVID-19 wave in the Netherlands, hospitals had to scale down their elective care all over the hospital to make room for COVID-19 patients. Even the Operating Room (OR) reduced their surgeries to acute care. It is, however, hard to define how much the OR should downscale. Also, there are no national plans on how hospitals should...

master thesis 2021

document

COVID-19 and its long-term effects on activity participation and travel behaviour: A multiperspective view

van Wee, G.P. (author), Witlox, Frank (author)

This paper discusses possible long-term effects of COVID-19 on activity-travel behaviour. Making use of theories and concepts from economics, psychology, sociology, and geography, this work argues that lasting effects can be expected, and specifically that peak demand among car and public transport users may be lower than if the pandemic...

journal article 2021

document

Return to Status Quo Ante: The Need for Robust and Reversible Pandemic Emergency Measures

Rainey, S. (author), Giubilini, Alberto (author)

This paper presents a normative analysis of restrictive measures in response to a pandemic emergency. It applies to the context presented by the Corona virus disease 2019 (COVID-19) global outbreak of 2019, as well as to future pandemics. First, a Millian-liberal argument justifies lockdown measures in order to protect liberty under pandemic...

journal article 2021

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Analysis of Partial Discharge Behaviour under Staircase-based Sinusoidal Voltage Waveforms

Ganeshpure, D.A. (author), Castro Heredia, L.C. (author), Ghaffarian Niasar, M. (author), Vaessen, P.T.M. (author), Soeiro, Thiago B. (author), Bauer, P. (author)

This paper presents a comparison in Partial Discharge (PD) behaviour when an air corona setup is subjected to different waveforms, namely an idealized 50 Hz sinusoidal and staircase-based sinusoidal waveforms near inception voltage and at a higher voltage. In this study, it has been observed that the PD repetition rate and the Phase-Resolved PD ...

conference paper 2021

document

COVID-19 passenger transport measures and their impacts

Shortall, R.M. (author), Mouter, N. (author), van Wee, G.P. (author)

Governments all over the world have had to implement various policy measures in order to curb the spread of COVID-19, impacting many people's lives and livelihoods. Combinations of measures targeting the transportation sector and other aspects of social life have been implemented with varying degrees of success in different countries. This...

journal article 2021

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Culture, Corona, Crisis: Best Practices and the Future of Dutch Museums

Tissen, L.N.M. (author)

The consequences of the coronavirus and the physical limitations it imposes on museums and their visitors force museums to rethink cultural identity and to approach the exhibition of material artworks differently. Only a limited number of people are allowed to visit the museum at one time, booking time slots is mandatory, making it difficult to...

journal article 2021

document

Daily family routines after Corona times

van Nifterik, Wies (author)

The COVID-19 pandemic had a major impact on the daily routines of families in the Netherlands. From March 2020, strict measures were taken by the government to prevent the spread of the virus; The Dutch population was under quarantine. This caused many changes in the everyday life of families. Using an exploratory process with six families,...

master thesis 2020

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Study of Corona Configurations under DC Conditions and Recommendations for an Identification Test Plan

Abdul Madhar, S. (author), Mraz, Petr (author), Mor, A. R. (author), Ross, Robert (author)

Corona is one of the most common forms of partial discharge (PD) occurring in high voltage (HV) energy systems. The corona mechanism in air is not exclusive to the field of energy applications but has also been widely studied by physicists to theorize mechanisms of charge transfer during the different phases of gas discharge. The phases of the...

journal article 2020

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Public Transport during coronavirus outbreak: A research of measures taken in Dutch and international PT

van der Horst, C.G. (author)

In 2019 a virus surfaced in China that would later cause a pandemic: the coronavirus. Across the world measures were taken to reduce the spread of the virus. Public Transport (PT) had a unique position, being both an essential service and a place where the virus can easily be spread. This research investigates the measures taken in PT in the...

bachelor thesis 2020

document

Physical interpretation of the floating electrode defect patterns under AC and DC stress conditions

Abdul Madhar, S. (author), Mraz, Petr (author), Mor, A. R. (author), Ross, Robert (author)

Partial discharge is a prevalent phenomenon under high voltage (HV) where the discharge partially bridges the gap between two electrodes. At increasing voltage levels, physical dimensions and distances between the electrical parts become critical. Designing electrical components for such high voltages and planning of high voltage laboratories...

journal article 2019

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A Novel Approach for Partial Discharge Measurements on GIS Using HFCT Sensors

Mor, A. R. (author), Castro Heredia, L.C. (author), Muñoz Muñoz, F.A. (author)

This paper presents a novel measuring system for partial discharge (PD) measurements in Gas Insulated Systems (GIS) using high frequency current transformers (HFCT). The system is based on the measurement of the induced PD currents in the GIS enclosure. In opposition to the existing antenna technologies that measure the radiated energy in the...

journal article 2018