Een aantal auteurs uit hogescholen, de organisatie-advieswereld, de Inspectie brengen hun ideeen samen over kwaliteitszorg in het (hoger) onderwijs
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Er zit een gat tussen de theorie van het vakgebied economie en het praktijkgedrag van mensen. In de kwaliteitskunde lijkt het niet anders te zijn. De klassieke kwaliteitssystemen AQAP, ISO, INK/EFQM zijn in principe opgezet om tot verbetering van halffabricaten en eindproducten te komen.
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The authors compared three methods of reading and learning by using paper, as well as a variety of interactive study forms. Thier work is part of the large Amsterdam E-Boekenstad (E-Book city) research project (www.e-boekenstad.nl and http://e-boekenstad.wikispaces.com/). They investigate to what extent the materiality of a book determines the usability of the book form. Their tests were conducted in 2010 and 2011. They compared; 1.learning from paper, a laptop and an e-ink e-reader 2.paper with reading from web pages 3.paper and material presented into a digital mind map. As it turns out, in a study situation, electronic reading can only beat reading from paper when it offers real added value. For example, by providing a better overview and shorter comprehensive texts, like they did in their second study. The most important conclusion from all tests is that a simple translation from paper format to electronic format is not enough. Publishers should take advantage of the possibilities new techniques offer, and perhaps discard ‘traditional thinking’ in terms of linear essay-type books and paragraphs.
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With a market demand for low cost, easy to produce, flexible and portable applications in healthcare, energy, biomedical or electronics markets, large research programs are initiated to develop new technologies to provide this demand with new innovative ideas. One of these fast developing technologies is organic printed electronics. As the term printed electronics implies, functional materials are printed via, e.g. inkjet, flexo or gravure printing techniques, on to a substrate material. Applications are, among others, organic light emitting diodes (OLED), sensors and Lab-on-a-chip devices. For all these applications, in some way, the interaction of fluids with the substrate is of great importance. The most used substrate materials for these low-cost devices are (coated) paper or plastic. Plastic substrates have a relatively low surface energy which frequently leads to poor wetting and/or poor adhesion of the fluids on the substrates during printing and/ or post-processing. Plasma technology has had a long history in treating materials in order to improve wetting or promote adhesion. The µPlasma patterning tool described in this thesis combines a digital inkjet printing platform with an atmospheric dielectric barrier discharge plasma tool. Thus enabling selective and local plasma treatment, at atmospheric pressure, of substrates without the use of any masking materials. In this thesis, we show that dependent on the gas composition the substrate surface can either be functionalized, thus increasing its surface energy, or material can be deposited on the surface, lowering its surface energy. Through XPS and ATR-FTIR analysis of the treated (polymer) substrate surfaces, chemical modification of the surface structure was confirmed. The chemical modification and wetting properties of the treated substrates remained present for at least one month after storage. Localized changes in wettability through µPlasma patterning were obtained with a resolution of 300µm. Next to the control of wettability of an ink on a substrate in printed electronics is the interaction of ink droplets with themselves of importance. In printing applications, coalescence of droplets is standard practice as consecutive droplets are printed onto, or close to each other. Understanding the behaviour of these droplets upon coalescence is therefore important, especially when the ink droplets are of different composition and/or volume. For droplets of equal volume, it was found that dye transport across the coalescence bridge could be fully described by diffusion only. This is as expected, as due to the droplet symmetry on either side of the bridge, the convective flows towards the bridge are of equal size but opposite in direction. For droplets of unequal volume, the symmetry across the bridge is no longer present. Experimental analysis of these merging droplets show that in the early stages of coalescence a convective flow from the small to large droplet is present. Also, a smaller convective flow of shorter duration from the large into the small droplet was identified. The origin of this flow might be due to the presence of vortices along the interface of the bridge, due to the strong transverse flow to open the bridge. To conclude, three potential applications were showcased. In the first application we used µPlasma patterning to create hydrophilic patterns on hydrophobic dodecyl-trichlorosilane (DTS) covered glass. Capillaries for a Lab-on-a-chip device were successfully created by placing two µPlasma patterned glass slides on top of each other separated by scotch tape. In the second application we showcased the production of a RFID tag via inkjet printing. Functional RFID-tags on paper were created via inkjet printing of silver nanoparticle ink connected to an integrated circuit. The optimal operating frequency of the produced tags is in the range of 860-865 MHz, making them usable for the European market, although the small working range of 1 m needs further improvement. Lastly, we showed the production of a chemresistor based gas sensor. In house synthesised polyemeraldine salt (PANi) was coated by hand on top of inkjet printed silver electrodes. The sensor proved to be equally sensitive to ethanol and water vapour, reducing its selectivity in detecting changes in gas composition.
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In manufacturing of organic electronics, inkjet printing as an alternative technique for depositing materials is becoming increasingly important. Aside to the ink formulations challenges, improving the resolution of the printed patterns is a major goal. In this study we will discuss a newly developed technique to selectively modify the substrate surface energy using plasma treatment as a means to achieve this goal. First, we look at the effects of the μPlasma treatment on the surface energy for a selection of plastic films. Second, we investigated the effects of the μPlasma treatment on the wetting behaviour of inkjet printed droplets to determine the resolution of the μPlasma printing technique. We found that the surface energy for all tested films increased significantly reaching a maximum after 3-5 repetitions. Subsequently the surface energy decreased in the following 8-10 days after treatment, finally stabilizing at a surface energy roughly halfway between the surface energy of the untreated film and the maximum obtained surface energy. When μPlasma printing lines, an improved wetting abillity of inkjet printed materials on the plasma treated areas was found. The minimal achieved μPlasma printed line was found to be 1 mm wide. For future application it is important to increase the resolution of the plasma print process. This is crucial for combining plasma treatment with inkjet print technology as a means to obtain higher print resolutions.
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Over de vijf ontwikkelingsfasen van een organisatie uit het INK-managementmodel toegspitst op een onderwijsorganisatie
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In this article we investigate the change in wetting behavior of inkjet printed materials on either hydrophilic or hydrophobic plasma treated patterns, to determine the minimum obtainable track width using selective patterned μPlasma printing. For Hexamethyl-Disiloxane (HMDSO)/N2 plasma, a decrease in surface energy of approx. 44 mN/m was measured. This resulted in a change in contact angle for water from <10 up to 105 degrees, and from 32 up to 46 degrees for Diethyleneglycol-Dimethaclylate (DEGDMA). For both the nitrogen, air and HMDSO/N2 plasma single pixel wide track widths of approx. 320 μm were measured at a plasma print height of 50 μm. Combining hydrophilic pretreatment of the glass substrate, by UV/Ozone or air μPlasma printing, with hydrophobic HMDSO/N2 plasma, the smallest hydrophilic area found was in the order of 300 μm as well.
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Physical activity (PA) can have a substantial benefit in the prevention, treatment andrehabilitation of (breast) cancer. Wearable devices offer possibilities to monitor PA,to provide feedback and to set targets. Although the market for PA related wearabledevices is booming, the impact of these wearables is questionable. One of the mainconcerns is the limitations to address individual needs of users, among which specificgroups such as women with breast cancer. Through design, we see opportunities tostimulate for self-enhancement while encouraging PA after cancer treatment.Following a constructive design research approach, Aymée was designed. Aymée is asmart bra that changes its pattern based on the amount of PA. Through thisinteraction, Aymée aims to reinforce women recovering from breast cancer to feelgood about themselves and to be (more) active. In this paper, we describe both thedesign approach in co-creation with former breast-cancer patients, as well as firstresults. We also discuss implications for designing intelligent systems that address PAencouragement.
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Understanding the decision-making process of a boardroom is one of the most fascinating parts of organizational research. We are all interested in power games, team dynamics and how the external environment could influence the decision of directors. One of the important buzzwords of today is “good governance” and many boards face a lot of societal pressure to implement best practices of governance. It goes beyond regulatory requirements and boards need to take a different perspective on integrating governance codes and best practices in their organizations. In this study, we focused on the role of individual directors in developing organizational responses to that pressure. More specifically, we looked at how directors’ own cognitive frames of governance influence the way boards choose best practices.
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The conductive textile grid is a large-scale (226 x 115 cm) multi-layer demonstrator exhibiting different conductive textile materials with certain outputs (such as LEDs, thermo-chromic ink and shape memory alloy) can be connected onto a base conductive fabric. Various conductive materials such as knitted patches, woven patches and 3D woven patches are attached on to the 2D base conductive fabric using different connectors. The objective is to determine the best way to electrically connect the various conductive textile patches, providing smooth transfer of current in each of the conductive patches of the base conductive fabric. The functioning of the outputs proved the transfer of electricity from the base fabric onto the conductive patches activating the outputs. The demonstrator constructed on semi-industrial scale has unique features and each of the components can be implemented integrally to develop different products of Smart textiles. Paper written by the Smart Functional Materials chair of Saxion for and accepted by the Autex Conference 2013 (22-24 May 2013, Dresden, Germany).
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