High level circular use of post-consumer insulating glass units will contribute to lower the environmental and social impact of insulation glass industry. The application of various circular strategies for insulating glass units (IGU’s) is rising. The product age will give an indication of the remaining life-time of an IGU, but a method which includes screening a technical quality is needed to check if an IGU is indeed suitable for re-use on a high level of circularity. In this study the argon concentration is suggested as discriminative quality. Energy efficient double glazing applied in windows of buildings situated in The Netherlands were studied. Product codes were noted and unraveled. Measurements were performed using the Sparklike Laser Portable, a non-invasive argon measuring device, which generates argon concentration, glass thickness and cavity width values. In addition, measurements were performed with a Glass Check thickness meter. The resulting data were analyzed. Measuring errors were explored and used to setup a testing procedure. Threshold values of the product age and argon concentration were selected for different circular strategies. In conclusion, a screening method using the product age and argon concentration to determine the circular use potential of insulating glass units is proposed.
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From the article: "ABSTRACT: The research group Supply Chain Redesign in the Built Environment of HU University of Applied Sciences is working on research that combines principles of the circular economy with open source architectural design & urban planning. The aim is finding new ways to re-use demolition waste and recycled materials in small scale urban area developments. And to “democratize” traditional processes in the built environment. Different recent studies have shown the potential benefits, such as a reduction of emissions. In “Hof van Cartesius”, a practical case-study in Utrecht, the ambitions and implications of this approach are being questioned, investigated and tested."
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Presentation about the KIEM-RETOUR Circular Carpets project.
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BackgroundScientific software incorporates models that capture fundamental domain knowledge. This software is becoming increasingly more relevant as an instrument for food research. However, scientific software is currently hardly shared among and (re-)used by stakeholders in the food domain, which hampers effective dissemination of knowledge, i.e. knowledge transfer.Scope and approachThis paper reviews selected approaches, best practices, hurdles and limitations regarding knowledge transfer via software and the mathematical models embedded in it to provide points of reference for the food community.Key findings and conclusionsThe paper focusses on three aspects. Firstly, the publication of digital objects on the web, which offers valorisation software as a scientific asset. Secondly, building transferrable software as way to share knowledge through collaboration with experts and stakeholders. Thirdly, developing food engineers' modelling skills through the use of food models and software in education and training.
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Construction and demolition waste (CDW) is the most important waste stream in the EU in terms of mass, with around 340 million tonnes between 2010 and 2018 (EEA, 2020). Most member states achieved a recovery target of 70% for this fraction, however, it is mainly based on backfilling or downcycling. Materials coming from demolition and renovation work are not often available for reuse or recycling activities, with some noticeable exceptions in the case of some pioneering Urban Resource Centres (URCs). URCs are physical centres that promote the circular economy at local level (Partnership on Circular Economy, 2019) prioritizing reuse, preparation for reuse, upcycling and remanufacturing activities over material recycling. This is an emerging concept throughout Europe, that has received much policy attention given its potential to help achieve Circular Economy goals set by the European Commission. So far there have been no systematic analyses of URCs, their operation and their impact. The goal of our paper is twofold: 1) to understand how frontrunning URCs currently operate and 2) to derive conclusions/policy recommendations/design principles for URCs. This article presents a comparison of seven URCs that to some extent allow the reuse of CDW in their locations. The data has been gathered in guided study visits to the different locations, complemented by additional information provided by the managers of the URCs through their yearly reports and follow up conversations. The research took place as part of the project Centers for Urban Resources, Reuse and Remanufacture (Cure+), which aims to establish URC pilots in the four project cities (Riga, Tartu, Kavala and Barcelona).
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In order to achieve more impact and efficiency on the route towards a circular economy, new business models are introduced in the value chain of construction. It is suggested that lease and performance contracts will stimulate producers to improve quality and lifetime of building products, thereby ameliorating use and reuse of products and their materials. This, since these companies know the origin and composition of the materials, and the history of use and service of the products. The advantages seem to be obvious: the user only pays for use and performance of the product e.g. light, energy, vertical transport or protection against water and wind. The producers remain the owners of products and resources, and have the possibility to reuse and recycle materials and products in an efficient manner. This requires that they provide service during the lifetime of the products, and have the obligation to take care of the perfor- mance of their products over a certain period of time.In the Netherlands these circular business models (CBMs) are already implemented at a small scale. The introduction of these models raises some fundamental questions however, which, ideally, need to be addressed before such models are implemented at a larger scale. The aim of this paper is on the one hand to describe some of these business models, and on the other hand to reflect on some fundamental questions that can be raised in relation to a shift of ownership of materials. What may be the consequences of this shift of ownership? What are the risks of agglomeration of building materials by larger companies? Among other things such a shift could potentially influence the diversity and flexibility of choice available for tenants and building owners. It may also limit future possibilities of SME’s in the supply chain of construction. Are there ways to minimize some of these risks if we decide to implement these business models at a large scale?
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Verouderd isolatieglas eindigt vaak in relatief laagwaardige toepassingen als glaswol of verpakkingsmateriaal. Zonde, als je bedenkt hoeveel energie het kost om glas te maken. De Faculteit Techniek van de Hogeschool van Amsterdam (HvA) onderzoekt samen met bedrijven strategieën voor hergebruik. Onderzoekers Elke van Nieuwenhuijzen en Ed Melet: “We willen prototypes laten zien en bewijzen dat ze toepasbaar en te produceren zijn voor de bouw.”
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The use of social networking and e-health technology through mobile (and other) devices, like smartphones and tablets, has been increasing in the last 20 years. This is equally true for people in marginalized situations, like homeless people. Earlier research shows that the majority of homeless people own a smart phone (Heaslip et al., 2021) and that mobile technology has the potential to support the health and wellbeing of persons who are homeless (Calvo & Carbonell, 2019). In our presentation, we will explore this potential further and shed light on how and why online social networking is used by homeless people and their social workers.We will present findings from our two-year qualitative research project ‘Social Network First?’ on network support offered to homeless people in Amsterdam and Haarlem, two cities in the Netherlands. In the recent decade, the Netherlands has seen the number of homeless people doubled (CBS, 2021) and the urgency to support this disadvantaged group has increased. Whereas policy in previous years focused predominantly on a ‘housing first’ approach, in which the main priority is to accommodate homeless people, the belief grows that this approach is not sufficient. For that reason, in addition to housing, Dutch shelter organizations are implementing a novel network support approach in the care of homeless people. With this approach, loosely based on the resource group method, social workers attempt to empower their homeless clients by involving and strengthening their clients’ social contacts. To understand the network support approach and its contribution to the empowerment of homeless people, we have conducted 25 semi-structured interviews with homeless people, their relatives and friends, social workers, and other professionals involved. The analysis of the interview data reveals that online social networking is of crucial importance for the network support approach. Our (preliminary) results show that especially WhatsApp is used by social workers to connect the homeless person to his/her social network in two ways. Firstly, WhatsApp is used for thoroughly mapping the social network of the client. Secondly, WhatsApp is used to create an online support group, which offers the client and his/her network possibilities for (re)connection and mutual support. In addition, WhatsApp is used extensively by social workers to easily maintain contact with homeless clients. This is important because, especially with clients who are not ready yet to work on their recovery, using WhatsApp allows social workers to just check in once in a while, while giving control of the process to the client. Whereas these results are predominantly positive, we will also discuss the cons of social networking technology, like privacy issues. In conclusion, our presentation offers a comprehensive exploration of the opportunities of social networking technology in the context of supporting homeless people. By examining the implications for social workers, we aim to inspire attendees with insights in how digital communication methods can be used to improve their social work practice. Subsequently, we aspire this contributes to developing pathways out of homelessness with the help of others.
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Purpose: The purposes of this study were, first, to (re)design the user-interface of the activity tracker known as the MOX with the help of input from elderly individuals living independently and, second, to assess the use of and experiences with the adapted Measure It Super Simple (MISS) activity tracker in daily life. Methods: The double diamond method, which was used to (re)design the user-interface, consists of four phases: discover, define, develop, and deliver. As a departure point, this study used a list of general design requirements that facilitate the development of technology for the elderly. Usage and experiences were assessed through interviews after elderly individuals had used the activity tracker for 2 weeks. Results: In co-creation with thirty-five elderly individuals (65 to 89-years-old) the design, feedback system, and application were further developed into a user-friendly interface: the Measure It Super Simple (MISS) activity. Twenty-eight elderly individuals (65 to 78-years-old) reported that they found the MISS activity easy to use, needed limited help when setting the tracker up, and required limited assistance when using it during their daily lives. Conclusions: This study offers a generic structured methodology and a list of design requirements to adapt the interface of an existing activity tracker consistent with the skills and needs of the elderly. The MISS activity seemed to be successfully (re)designed, like the elderly who participated in this pilot study reported that anyone should be able to use it.
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This article proposes that identity formation and reformation are important dynamics that influence and are influenced by the course of a sustainability transition. We study identity (re-)formation in the transition of the dairy sector in a rural area in the Netherlands: the Green Heart. Soil subsidence, high emissions, and economic pressures require substantial changes in practices in the dairy sector and most importantly, the landscape that it is intertwined with. We use narrative analysis to study identity (re-)formation in two new stakeholder collectives that aim to address sustainability in the area. We identify discrepancies between the narratives in these collectives and the transition challenge. These discrepancies can be explained by the role that the landscape of the Green Heart plays in the identity (re-)formation within these collectives. The attachment to the current landscape forms a lock-in for the sustainability transition in this area.
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