136 Works

Selective exposure on Facebook

Petra Ravbar
This study investigated the causes and consequences of selective exposure on Facebook. The sample included Dutch and Slovenian (N = 134) undergraduate students. The results show that people who see, read, or click more news posts on Facebook feel more informed about the current political issues. Moreover, using Facebook as the main source of news was shown t go strongly influence the strength of the opinions towards political topics, namely immigration and membership in the...

Assessment of dose conversion coefficients for accident dosimetry with mobile phone components

Demi Römkens
The resistors on the circuit board of a mobile phone can be used for accident dosimetry, because they exhibit optically stimulated luminescence due to radiation. The reconstructed dose from the resistors needs to be converted to organ absorbed doses. For this, Monte Carlo simulations are made. The resulting theoretical conversion coefficients are experimentally validated within this research. The main conclusion of this research is that the theoretical conversion coefficients do not significantly differ from the...

The Link between Salivary Surfactant-Protein D and Dementia in Nursing Home Dementia Patients

Celine Budding & Toon Holman
Recently, serumal surfactant protein D (SP-D) has been shown to correlate with the development of dementia. As SP-D can be measured reliably in saliva, this might provide opportunities for a non-invasive biomarker. This preliminary study aims to determine a possible difference between the levels of salivary SP-D in nondemented elderly and late stage demented elderly. Results indicate a significant difference between demented subjects and controls, and between male and female demented subjects. This suggests SP-D...

Een Alarmerend Probleem

Silvana Riphagen, Sanne Feiner & Renée Hovenier
Het aantal valse alarmen op de Spoedeisende Hulp is een groot probleem. Door de overvloed aan valse alarmen reageren zorgverleners minder adequaat op ware alarmen, wat de patiëntveiligheid in gevaar brengt. Het doel van deze studie is het ontwikkelen van een methode om het aantal valse alarmen op de Spoedeisende Hulp te reduceren. Hiervoor is een algoritme ontwikkeld waarin aritmiedetectie in het elektrocardiogram wordt gecontroleerd met signaaleigenschappen van het fotoplethysmogram. Dit algoritme leidt tot verhoogde...

VERBETERDE IMPACTWEERSTAND VAN VEZELVERSTERKTE COMPOSIETEN D.M.V. ELEKTROGESPONNEN NANOVEZELS

Cas De Coninck, Elias De Ketelaere, Helena Loobuyck, Lars Maebe & Leander Van Speybroeck
Vezelversterkte composieten combineren een laag gewicht met zeer goede mechanische eigenschappen en kennen zo vele toepassingen in sectoren waarbij gewichtsbesparing cruciaal is, zoals de luchtvaart-, de ruimtevaart-, de windturbine- of de automobielsector. Typisch komen deze composieten als een gelaagd materiaal: de vezelversterking wordt ingebracht door het stapelen van verschillende lagen, waarna ze geïnfuseerd worden met een kunststofmatrix. Ondanks de vele voordelen hebben deze composietlaminaten een groot nadeel omdat de verschillende lagen kunnen loskomen van elkaar,...

Het aanleren van ergonomisch handelen is geen gespreid bedje

Hanneke Van Nistelrooij
Het merendeel van de tweedejaars Helpende studenten (n=6) van de pilotopleiding Dienstverlening ROC de Leijgraaf, handelt niet ergonomisch bij de vaardigheid ‘bed opmaken met zorgvrager erin’. Uit verkennend onderzoek blijkt onder andere dat er in lichte mate sprake is van kennistekort, maar ook dat ergonomie niet expliciet getoetst wordt. Uit interviews met studenten werd duidelijk dat zij behoefte hebben aan meer uitleg, directe feedback en een duidelijk voorbeeld. Als verbeteracties zijn hiervoor een lessenreeks en...

Cyclisch leren en onderwijzen van woordenschat

Josien Boetje
Het woordenschatonderwijs Spaans op het Revius Doorn bereikte niet het gewenste effect dat leerlingen het aangereikte vocabulaire op middellange termijn onthouden en kunnen activeren. Om dit probleem aan te pakken werd een woordenschatcompetitie ontwikkeld en getest, waarbij leerlingen 4 weken beloond werden om buiten de lessen cyclisch te herhalen. Uit de productevaluatie bleek dat leerlingen: i) extra gemotiveerd waren om eerder met leren te beginnen, ii) meer op de middellange termijn onthielden (p

Investigating The Modality Dependent and Independent Representations of Letters and Numbers

Dora Gözükara
Multimodal neural representations require a system in which both different aspects of the physical stimuli are represented, and also a multimodal abstraction is. In this study, we compared the representational systems of numbers and letters by using an fMRI experiment. Our findings can be summarized in two points: (1) The left intraparietal sulcus is involved in representing multimodal numbers and letters. (2) There are shared visual and auditory areas in the representations of numbers and...

Fipronil-crisis in the Netherlands: An analysis of the financial effects of the chosen approach (detoxicate or prematurely cull hens) by farmers during the fipronil-crisis in the Netherlands

Job De Lange
The fipronil-crisis that occurred in the Netherlands in 2017, had a big impact on the poultry sector. Farmers had to make the decision to either detoxicate (a diet which attempts to eliminate the fipronil which is stored in the fat) or prematurely cull their hens. This research compares detoxification and prematurely culling in a financial way, to provide an answer for the question: Which approach would have restrained, with hindsight, the financial impact for the...

Underwater Sound Filtering

Ines Simic
The cocktail party algorithm is one of the most used algorithms for source separation of sound. The algorithm aims to find an automated solution for a problem that everyone experiences regularly, namely how to make oneself heard in a noisy environment. The CP algorithm picks up the sound from different microphones, and applies smart filters once the system has determined which sounds originate from the same source.This problem also becomes topical when developing sensors based...

The Relation between Adolescent Depressive Symptoms and Adolescents’ Perceived Attachment to Father and Mother over a Two-Year Period

Fleur Vissers
This study examined the predictive value of adolescent depressive symptoms on perceived adolescent-mother and adolescent-father attachment two years later, as well as the moderating role of sex. 1110 young adolescents (52,7% boys, Mage = 12.44, SDage = 0.61) were asked to report on their depressive symptoms and perceived at-tachment quality to both mother and father on two waves with a two-year interval. In conclusion, depressive symp-toms are no significant predictor of adolescent-father and adolescent-mother attachment...

Engaging in CSR: The effect of perceived corporate greenwashing in the CSR fit-purchase intention relationship, depending on the sector’s social responsible reputation.

Maarten Zandvoort
Corporations have increasingly been engaging in corporate social responsibility (CSR). However, there are some inconsistent findings regarding the relationship between CSR fit and purchase intention. The aim of the current study is to examine what factors influence this relationship. Based on a literature review, CSR fit is proposed to negatively influence perceived corporate greenwashing (PCG) and this is moderated by a sector’s social responsible reputation (SSRR). PCG in turn influences purchase intentions negatively as well....

Civil Religion in African-American Mourning Songs about John F. Kennedy

Anne Wester
This research focuses on a selection of African-American songs about the death of John F. Kennedy. The paper thereby particularly concentrates on the question how African-American artists express civil religious ideas in relation to the efforts and accomplishments of the Kennedy Administration, the comparisons that are made between Biblical figures and the slain president, and the manner in which these artists express civil religion when discussing the future of the United States after the death...

Generation of αGFP-nanobodies suitable for super-resolution imaging of nuclear proteins

Niklas Bachmann
The emergence of single molecule localization microscopy (SMLM) techniques made the imaging of cells at resolutions far beyond the diffraction barrier possible. However, the usual approach of tagging a protein of interest (PoI) with a primary antibody, and tagging this one with a fluorophore-carrying secondary antibody, introduces a significant displacement of the signal from the PoI. Here, the generation and application of an αGFP-nanobody is described which, through its reduced size and direct fluorophore labeling,...

Een Positieve Kijk op Emoties van Docenten in het Voortgezet Onderwijs

Suzanne Van Hoogstraten, Kim Severien & Maaike Van Der Veen
In het beroep van een docent is de emotionele betrokkenheid en de relatie met de leerlingen van groot belang. De emotionele betrokkenheid is enerzijds een motivatie voor dit beroep, anderzijds kan het ook voor stress zorgen. De huidige studie, onder 21 docenten in het voortgezet onderwijs, onderzoekt of en hoe sterk de voorkeur voor emotieregulatie, de emotieregulatiestrategie en de docent-leerling relatie samenhangen met de mate van bevlogenheid. De emotieregulatiestrategie reappraisal bleek een significante samenhang te...

Een mechanistische kijk op drogende suspensiedruppels

Gea Van De Kerkhof
Het drooggedrag van watergedragen verven wordt in grote mate bepaald door de vervormbaarheid van de microscopisch kleine deeltjes waaruit ze bestaan. Om het effect van deze vervormbaarheid op het droogproces van een suspensie druppel te testen, synthetiseren wij gecrosslinkte rubber nanodeeltjes in water. De crosslinker voorkomt samenvloeiing van de deeltjes. De fenomenen die we observeren bij het drogen van zo’n druppeltje, invasie van lucht, capillaire deformatie, rimpelingen en breukvorming, blijken te veranderen rond één algemene...

Predicting memory scores brain from resting state connectivity

Esra Freitag
While decades of neuroscientific research has detailed the brain networks underlying memory, to date the neurobiology underlying interindividual memory differences in a healthy population is not known. Here we use the behavioral and resting state fMRI data from the Human Connectome Project (HCP), and predict subjects’ scores on tests of working and episodic memory based on their whole brain functional connectivity significantly above chance. We observed that brain connectivity between regions determining differences between healthy...

Instrumental variables in psychology

Hugo Hanema
In the social sciences, it is often of great importance to clearly uncover causal relationships. However, many researchers are unaware of the issue of endogeneity which biases estimates of causal effects. The instrumental variable (IV)-approach solves endogeneity and can make a convincing argument for causality even with cross-sectional data, but has been under-utilized in the social sciences. This paper explains the IV-approach and provides an example of application of this method to the psychological research...

Are Paid Influencers Bad Influencers?

Philippa Josefsson, Lou Rougié & Iris Verboom
This research paper aims to explore the effect of source credibility on persuasion of a message recipient, and how authenticity mediates this relationship. We begin with an introduction to the research question, a discussion on the managerial relevance of this topic and the theoretical background. We outline variables and the research strategy, and develop an experimental design. The study goes on to analyze responses collected from 125 students at Erasmus University. Disclosure of incentives has...

Snack Frequency and Relative Weight in U.S. Toddlers and Preschoolers

Desi Beckers
Most previous research found that snack frequency (SF) and relative weight (RW) were inversely or not associated, but may be biased by misreporting of energy intake. Main aim of this study was to examine the association of SF with RW in toddlers and preschoolers participating in the National Health and Nutrition Examination Survey (N = 3618). Multiple linear regressions revealed that SF was positively associated to RW after adjusting for confounding factors including reporting accuracy,...

Language barriers in hotels How language proficiency influences perceived service quality

Joshua Wagner
In the hotel industry, which is highly international and therefore prone to language barriers, the interaction between an employee and a guest is very important as companies try to make them loyal to their brand and reap the benefits of guest retention. In this research, an experiment has been conducted to test the relationship between language proficiency (LP) and perceived service quality (PSQ). In a nutshell, a B2 level (Common European Framework of Reference, Council...

Insulin sensitivity and fat mass in young male sedentary adults

Gereon Hecht, Esther Phielix, Yvo Op Den Kamp & Joris Hoeks
We live in an obesogenic environment, spending a lot of time sitting neglecting physical activity. This study aims to determine the impact of a sedentary lifestyle on insulin sensitivity by comparing insulin sensitivity of healthy athletes and sedentary subjects. Twelve athletes and 12 sedentary subjects underwent a two-step hyperinsulinemic euglycemic clamp test to assess insulin sensitivity and a DEXA scan to assess body fat mass. Insulin sensitivity was significantly lower in sedentary subjects (p=0.009) and...

About Time

Nils L.M. Van De Ven
Survival analysis is a method of analysis used to study event occurrence. Missing periods in discrete-time survival analyses are problematic, since whether an event occurs determines whether the subject is followed up upon. Seven strategies that can be used when missingness occurs (case deletion, deletion upon missing, single imputation, multiple imputation, remembrance, the Non-Event-Strategy and the Event-Strategy) are evaluated using four criteria: effect size bias, standard error bias, power and coverage rate of confidence intervals....

Kennis en gedrag van vrouwelijke studenten ten aanzien van risicofactoren voor borstkanker

Willemijn Kesteloo
Dit cross-sectionele onderzoek beschrijft de mate van kennis en gedrag van vrouwelijke studenten ten aanzien van risicofactoren voor borstkanker. Aan dit onderzoek deden 158 van de 532 studenten van de academies voor Zorg & Welzijn en Educatie & Pedagogiek van de HZ mee. Bij de meerderheid van de respondenten is er een gebrek aan kennis over de borstkankerrisicofactoren. Professionals kunnen door voorlichting te geven kennis vergroten en aanzetten tot gezonder gedrag. Dit kan bijdragen aan...

Van Bouwstenen naar Smart City: wat er geleerd kan worden van Nederlandse Smart City-initiatieven

Matthijs Duenk & Dianne Scholte
De term ‘Smart City’ wordt steeds vaker genoemd als oplossing voor klimaat- en verstedelijkingsproblemen. Veel lokale overheden weten echter niet wat zij concreet kunnen doen om hun eigen Smart City-initiatief te ontwikkelen. In het onderzoek ‘Van Bouwstenen naar Smart City’ is onderzocht wat voor lokale overheden de bouwstenen zijn voor een succesvol proces tot de ontwikkeling van Smart City-initiatieven. Met behulp van een viertal Smart City-initiatieven in Nederland en gesprekken met betrokken partijen is gekomen...

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