This paper investigates the relationship between self-build housing and the wider planning and housing regime. Although there is growing policy and academic attention to self-build housing, there is a lack of understanding of the institutional and regulatory conditions shaping the prospects of such housing provision. This paper takes the case of The Netherlands and scrutinizes how institutional dynamics over time have made lower and middle residents dependent on densely organized consortia of municipalities, housing associations and developers. These norms of land development appear to be at odds with the logic of self-building. Through exploring evidence in a pilot study of a municipal self-building scheme in Almere, the authors suggest that making self-building the cornerstone of a resident-led land development strategy, also for low- and middle-incomes, implies a reconfiguration of the actors’ positions in housing provision. This entails a commissioning role for residents in the institutional domain of social and commercial developers.
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The aim of this research is to assess the potential impact of the CO2 Performance Ladder on CO2 emission reduction. The CO2 Performance Ladder is a new green procurement scheme that has been adopted by several public authorities in the Netherlands; it is a staged certification scheme for energy and CO2 management. The achieved certification level gives companies a certain competitive advantage in contract awarding procedures. While the scheme has been widely adopted by companies in the construction industry, other types of companies in the supply chain of the commissioning parties also participate. Currently, more than 190 companies participate in the scheme. The aggregate CO2 emissions covered by the scheme are around 1.7 Mtonnes, which corresponds to almost 1 % of national greenhouse gas emissions in the Netherlands. Since the introduction of the scheme the total CO2 emissions have decreased substantially. Nevertheless, these emission reductions should be interpreted with caution since emission reductions are dominated by a few companies and are affected to a large extent by economic activity. Companies participating in the scheme have set different types of CO2 emission reduction targets with varying ambition levels. The projected impact of these targets on CO2 emissions is in the range of a 0.5 %-1.3 % absolute emission reduction per year, with a most likely value of 1.1 %. The CO2 Performance Ladder can therefore make a substantial contribution to achieving the CO2 emission reductions for non-ETS sectors in the Netherlands up to 2020.
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Electrification of transportation, communication, working and living continues worldwide. Televisions, telephones, servers are an important part of everyday life. These loads and most sustainable sources as well, have one thing in common: Direct Current. The Dutch research and educational programme ‘DC – road to its full potential’ studies the impact of feeding these appliances from a DC grid. An improvement in energy efficiency is expected, other benefits are unknown and practical considerations are needed to come to a proper comparison with an AC grid. This paper starts with a brief introduction of the programme and its first stages. These stages encompass firstly the commissioning, selection and implementation of a safe and user friendly testing facility, to compare performance of domestic appliances when powered with AC and DC. Secondly, the relationship between the DC-testing facility and existing modeling and simulation assignments is explained. Thirdly, first results are discussed in a broad sense. An improved energy efficiency of 3% to 5% is already demonstrated for domestic appliances. That opens up questions for the performance of a domestic DC system as a whole. The paper then ends with proposed minor changes in the programme and guidelines for future projects. These changes encompass further studying of domestic appliances for product-development purposes, leaving less means for new and costly high-power testing facilities. Possible gains are 1) material and component savings 2) simpler and cheaper exteriors 3) stable and safe in-house infrastructure 4) whilst combined with local sustainable generation. That is the road ahead. 10.1109/DUE.2014.6827758
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Large structural changes are occurring in our society at this very moment. This has some large consequences for project development. According to Rudy Stroink, project development is on the brink of a system. The new style developer has to adapt to a new earning model. The golden ages are over. Private and collective commissioning are the beginning of a period in which the user will want to direct its own environment. The developer has to adapt if he wants to survive. Durability, long term profit, flexible office concepts and private and collective commissioning for houses will have to help the real-estate sector. This article will show the developments that caused this situation.
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Research suggests that construction clients, as building owner-occupier, are struggling to implement smart maintenance. This thesis assumes that this is due to a failure to fully understand the institutional complexities of smart maintenance. Hence, the aim of this thesis was to improve our understanding of these complexities and to develop theoretical and practical knowledge on the professionalization of construction clients in commissioning smart maintenance through stewardship. Stewardship theory portrays managers and employees as collectivists, pro-organizational and trustworthy, and can be used for designing collaborations based on intrinsic motivation and trust. A first insight from this thesis relates to how institutional complexity in smart maintenance management (SMM) can be understood (study 1). Institutional complexity is defined as the combined effect of 15 interorganizational and intraorganizational tensions that are active simultaneously. A second insight from this thesis relates to the capabilities that construction clients need to address the institutional complexities of SMM and connect various institutional fields (study 2). Using data collected from four cases involving two construction clients, a framework with eight maturity dimensions, involving 23 sub-dimensions, has been developed and validated. The third insight from this thesis relates to the role of the purchasing function in commissioning smart maintenance and emerged from considering the service triad concept (study 3). The findings indicate that the service triad concept fails to provide sufficient detail to adequately describe the construction client’s role in SMM. Hence, the service triad is extended to a service hexad. Our fourth insight relates to intrapreneurial stewardship (study 4). A process model for change implementation through stewardship interventions has been developed and then evaluated in a case study. The process model combines constructs from stewardship theory with intrapreneurship concepts and describes how employees can be coached by leaders during periods of organizational change. Together, the insights from the four studies are synthesized in a framework for client-led innovation in SMM and describe how construction clients can increase SMM maturity in institutionally complex environments through stewardship.
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The Heating Ventilation and Air Conditioning (HVAC) sector is responsible for a large part of the total worldwide energy consumption, a significant part of which is caused by incorrect operation of controls and maintenance. HVAC systems are becoming increasingly complex, especially due to multi-commodity energy sources, and as a result, the chance of failures in systems and controls will increase. Therefore, systems that diagnose energy performance are of paramount importance. However, despite much research on Fault Detection and Diagnosis (FDD) methods for HVAC systems, they are rarely applied. One major reason is that proposed methods are different from the approaches taken by HVAC designers who employ process and instrumentation diagrams (P&IDs). This led to the following main research question: Which FDD architecture is suitable for HVAC systems in general to support the set up and implementation of FDD methods, including energy performance diagnosis? First, an energy performance FDD architecture based on information embedded in P&IDs was elaborated. The new FDD method, called the 4S3F method, combines systems theory with data analysis. In the 4S3F method, the detection and diagnosis phases are separated. The symptoms and faults are classified into 4 types of symptoms (deviations from balance equations, operating states (OS) and energy performance (EP), and additional information) and 3 types of faults (component, control and model faults). Second, the 4S3F method has been tested in four case studies. In the first case study, the symptom detection part was tested using historical Building Management System (BMS) data for a whole year: the combined heat and power plant of the THUAS (The Hague University of Applied Sciences) building in Delft, including an aquifer thermal energy storage (ATES) system, a heat pump, a gas boiler and hot and cold water hydronic systems. This case study showed that balance, EP and OS symptoms can be extracted from the P&ID and the presence of symptoms detected. In the second case study, a proof of principle of the fault diagnosis part of the 4S3F method was successfully performed on the same HVAC system extracting possible component and control faults from the P&ID. A Bayesian Network diagnostic, which mimics the way of diagnosis by HVAC engineers, was applied to identify the probability of all possible faults by interpreting the symptoms. The diagnostic Bayesian network (DBN) was set up in accordance with the P&ID, i.e., with the same structure. Energy savings from fault corrections were estimated to be up to 25% of the primary energy consumption, while the HVAC system was initially considered to have an excellent performance. In the third case study, a demand-driven ventilation system (DCV) was analysed. The analysis showed that the 4S3F method works also to identify faults on an air ventilation system.
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The 'Media Battle' is a concept for a competitive one-week pressure-cooker contest, in which students develop a creative product for companies or other organisations. It brings together education, research and professional practice, with benefits for all parties involved. We guide participating organisations to develop a detailed problem description ensuring that descriptions are sufficiently clear and focused for students to work on during a week. Students spend the week developing their concept such that it can be pitched to their client organisation. Students are trained in pitching and are coached in developing creative concepts. Several groups have the same client. On the last day, clients select their favourite concept, while a jury selects a winner among the concepts of different clients. Most concepts are further developed in 'regular courses', while some concepts, usually the winning ones, are subject of further development in the curriculum. In this article we will describe our experiences with media battles and discuss critical success and failure factors.
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Through artistic interventions into the computational backbone of maternity services, the artists behind the Body Recovery Unit explore data production and its usages in healthcare governance. Taking their artwork The National Catalogue Of Savings Opportunities. Maternity, Volume 1: London (2017) as a case study, they explore how artists working with ‘live’ computational culture might draw from critical theory, Science and Technology Studies as well as feminist strategies within arts-led enquiry. This paper examines the mechanisms through which maternal bodies are rendered visible or invisible to managerial scrutiny, by exploring the interlocking elements of commissioning structures, nationwide information standards and databases in tandem with everyday maternity healthcare practices on the wards in the UK. The work provides a new context to understand how re-prioritisation of ‘natural’ and ‘normal’ births, breastfeeding, skin-to-skin contact, age of conception and other factors are gaining momentum in sync with cost-reduction initiatives, funding cuts and privatisation of healthcare services.
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The definition of ‘Assistive Technology’ (AT) includes both assistive products and the services or actions necessary for safe and effective provision of the assistive products to people who need them. International standards and product specifications exist for assistive products. Despite huge unmet need for effective AT provision, a variety of service delivery models across different countries, and a shortage of personnel trained in this field, nowidely useable and accepted AT service provision guidelines currently exist. Aligned with contemporary global initiatives to improve access to AT, a scoping review was commissioned to inform the development of globally useable provision guidance. The aim was to deliver a rapid scoping review of the literature regarding quality guidelines for AT service provision. Method: The rapid scoping review utilised a two-tiered approach to identifying relevant publications: 1) systematic search of academic databases; 2) consultation with assistive technology organisations. The review was conducted in March 2023 across four databases (Medline, CINAHL, SCOPUS and Google Scholar) with no date limitations. Systematic outreach to international and global AT networks was used to access expert informants. Non-English publications were included utilizing Google Translate and support from expert informants to verify content. Analysis was guided by the body of work on quality AT provision and service delivery processes in Europe, as well as the World Health Organization-GATE 5P framework for strengthening access to AT. Results: The search strategies yielded 41 publications from diverse countries, and directed at differing assistive products, personnel and provision contexts. Results are reported from the charted data through to the data extraction framework, including type of publication, study design, audience and reach. We report on the type of AT and the AT provision ecosystem elements discussed, and service delivery process or steps and quality criteria service delivery. Conclusion: This review did not find established guidelines or standards for service provision, but it did identify key service delivery steps which may form part of such guidelines, and many of the 3 publications included mentioned the need for practice guidelines. Despite different contexts such as type of assistive product, recipient of the guidance, language, location and authorship, core elements of AT provision including service delivery steps can be identified. Consideration regarding the nuances of vocabulary, of process, and of enabling flexible foci, is recommended in systematizing globally applicable guidance. This review offers a strong starting point for developing guidance for assistive technology provision to meet global need.
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Current symptom detection methods for energy diagnosis in heating, ventilation and air conditioning (HVAC) systems are not standardised and not consistent with HVAC process and instrumentation diagrams (P&IDs) as used by engineers to design and operate these systems, leading to a very limited application of energy performance diagnosis systems in practice. This paper proposes detection methods to overcome these issues, based on the 4S3F (four types of symptom and three types of faults) framework. A set of generic symptoms divided into three categories (balance, energy performance and operational state symptoms) is discussed and related performance indicators are developed, using efficiencies, seasonal performance factors, capacities, and control and design-based operational indicators. The symptom detection method was applied successfully to the HVAC system of the building of The Hague University of Applied Sciences. Detection results on an annual, monthly and daily basis are discussed and compared. Link to the formail publication via its DOI https://doi.org/10.1016/j.autcon.2020.103344
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