20 research outputs found
M & L Jaargang 24/4
Get PDFHilbrand De Vuyst Hout werkt. [Wood Works.]Slechts luttele personen stellen zich vermoedelijk een dergelijke vraag bij een molenbezoek. Zo vervreemd zijn we nu van het traditionele molenmakersambacht. Toch bepaalt nog steeds deze of gene afwerkingstechniek de belevingswaarde van het houten monument, zo verzekert ons Hilbrand De Vuyst, gespecialiseerd erfgoed-consulent. Voor omgang met hout is een grote vakkennis vereist. Molens vormen een ware encyclopedie van de houten bouw- en werktuigkunde. Ze zijn het product van intensief agrarisch en ambachtelijk genie. Met de molenrestauraties van de laatste jaren wordt opnieuw een aanzienlijke ambachtelijke kennis vergaard. Onze kennis neemt weer toe: vast en zeker, hout werkt.Dieter Nuytten Middeleeuwse dakkappen in het voormalige Hertogdom Brabant. [Mediaeval roof trusses in the former dukedom of Brabant.]Bij de middeleeuwse dakkappen van het voormalige hertogdom Brabant herkent men ruwweg twee -technologische groepen: sporenkappen en kappen met gebinten. Dieter Nuytten verkent een aantal Vlaams-Brabantse dakstructuren en stuit hierbij op dateringsmoeilijkheden. Een dendrochronologische datering kan in principe uitsluitsel geven over de precieze ouderdom van de houten structuren, maar er blijven nog tal van probleemgevallen. Vooral de Vlaamse eiken van vroeger geven hun leef-tijd niet prijs. Lokaal hout uit open bossen heeft immers een afwijkend groeipatroon.Inge Debacker Het behoud van houten buitenschrijnwerk: ramen. [The conservation of exterior woodwork: casements.]Houten ramen zijn kwetsbaar, ramen ouder dan de 18de eeuw zijn bijgevolg zelfs in historische gebouwen uiterst zeldzaam. Door de huidige isolatie-eisen, voortspruitend uit het begrip duurzaam bouwen, krijgt historisch raamwerk het bovendien steeds harder te verduren.Na een korte schets van de stilistische evolutie van 18de en 19de-eeuwse houten ramen, worden door Inge Debacker oplossingen tot behoud van historisch schrijnwerk aangereikt. Ze laat zich hierbij onder meer leiden door praktijkvoorbeelden uit Vlaams-Brabant. Ze illustreert treffend dat het begrip duurzaamheid verschillende ladingen dekt.Rudiger Van Hove De doelse Kogge(n). Maritiem erfgoed van Europees formaat. [The Doel cog, maritime heritage of european value.]In een geul in Doelpolder, de Deurganck of het Groot Gat, vindt men in september 2000 bij graafwerken een archeologische verrassing van formaat, een eikenhouten kogge van ruim 20 meter lang die uitzonderlijk goed is bewaard gebleven.De eertijds in dit gat geslagen en nu vakkundig opgegraven, geregistreerde en geborgen Doelse kogge is het centrale onderwerp van de bijdrage van Rudiger Van Hove, hoofd van de Archeologische Dienst Waasland. Samen met de beschrijving van het opgegraven maritiem erfgoed worden ook het onderzoekskader, de eigendom, het beheer en de diverse verantwoordelijkheden deskundig toegelicht.De auteur besluit met: wordt vervolgdSummar
Bouwen door de eeuwen heen in Vlaanderen, Inventaris van het bouwkundig erfgoed, Provincie Vlaams-Brabant, Gemeente Grimbergen, Deel II: Deelgemeenten Beigem, Humbeek en Strombeek-Bever
Get PDFBouwen door de eeuwen heen in Vlaanderen, Inventaris van het bouwkundig erfgoed, Provincie Vlaams-Brabant, Gemeente Grimbergen, Deel I: Deelgemeente Grimbergen
Get PDFHow do current policies support a transition towards a circular economy in the built environment?
No full textBuilding and construction industry consumes huge quantities of materials in an unsustainable way. As a result of a linear design approach and economic model, at the end of use, but also throughout the cycle, buildings or parts of buildings are demolished and remnants treated as waste or –best case– down-cycled. This creation of waste as well as the use of virgin resources leads to an important environmental, economic and societal impact. To create a sustainable build environment, the building sector needs to move towards a circular economy in which circular and dynamic buildings as well as their component and materials preserve value. Policies and regulations in member states and across the EU will influence the ability to transition to a circular economy – positively and negatively. Within the H2020 Buildings As Materials Banks (BAMB) Project work is underway to understand where the opportunities and barriers lie in a complex and, sometimes contradictory, regulatory landscape. This paper presents an overview of the current policy instruments that are considered to have relevance in relation to promoting, or possibly hindering, the adoption of circular economy opportunities in the built environment. The analysis of the current policy instruments has been done on a European level and on a member state level for 4 different countries being: Belgium, Portugal, Sweden and UK. The paper will mainly focus on the European Level and Belgium
Spectral properties in a class of operators and group representations in nested Hilbert spaces
No full textThe author characterizes the spectrum of the elements of some operator algebras acting in a nested Hilbert space. In one of those algebras he proves the spectral theorem for Hermitian operators and the SNAG theorem for unitary representations of locally compact Abelian groups. Then extends the SNAG theorem to representations in three more general classes of operators.Anglai
Lectures On Harmonic Analysis For Reductive -Adic Groups
No full textThis paper is based on lectures delivered at the Institute for Mathematical Sciences at the National University of Singapore in 2002. The author thanks the Institute for its support. is very natural and therefore a good place to begin the course. In order to form a group with respect to addition, the additive identity and additive inverses are tossed in to the mix to give us the integers 24380 35 This set does not form a group with respect to multiplication; it is therefore enlarged to , the field of rational numbers. Everything so far has been very natural. At this point, the incompleteness of the rationals is demonstrated by proving that the square root of two is not rational. To compensate for this, the fact that the rationals are ordered (that is, there is a notion of nonpositive and nonnegative) is invoked to define the absolute value, , of any rational number if As usual, the absolute value gives you a metric with respect to which you complete the rationals. We recall that two Cauchy sequences of rational numbers are said to be equivalent with respect to provided that is a Cauchy sequence which converges to zero. The set of real numbers is then defined to be the set of equivalence classes of Cauchy sequences with respect to , that is, the completion of with respect . It turns out, however, that the normal absolute value provides just one of an infinite number of incompatible ways to complete the rational numbers , and, from the proper perspective, this completion is a somewhat unnatural object. Let be any prime. If is a nonzero rational number, then there is a unique integer ! #"!$ with &% and '% . We can ..
Circular economy and design for change within the built environment: preparing the transition
No full textThe built environment is considered as a key sector in which circular economy can be implemented. Within the H2020 project “Building as Material Banks” (BAMB), two innovative solutions are being forward to support this transition: i.e. Materials Passports and Reversible Building Design Protocols. Based on desk research and interviews with frontrunners, key opportunities and barriers have been identified related to the implementation of both innovative solutions within policy, commercial, societal and R&D realms. In order to better understand these opportunities and barriers five emerging trends putting the current socio-technical system under pressure are explained. In addition, value chain and value network analyses of business-as-usual and stateof- the-art practices have been examined over major building phases: conceptualisation & design, construction, usage/operation, demolition/deconstruction & repurposing. We observed that that it is unlikely that an actor will be involved within all phases of the building and that the availability of building (product) information over all building phases is restricted. By supporting the development of Materials Passports and Reversible Building Design Protocols actors involves within the conceptualisation, design and construction stages will better understand why circular and change-supporting building design strategies are necessary. Moreover, the development of Materials Passport IT Platform and a BIM prototype will serve as a proof-of-concept on exchanging information on building products and the building's operation to actors involved within reverse logistics
Are you being served? Not onboard! Aviation manufactures moving towards service enabling systems
No full textProduct Innovatie ManagementIndustrial Design Engineerin
NOW WHAT? Impact of a Self-Advocacy Strategy on Middle School Students with Disabilities
Get PDFStudents with disabilities do not develop self-advocacy skills on their own; however, instruction in these skills is often lacking in special education programs. This lack of self-advocacy skills negatively impacts the ability of these students to participate in the general education setting. The purpose of this study was to twofold; specifically, it sought to determine whether middle school students with disabilities could be taught to recognize the need for self-advocacy and to employ appropriate help-seeking behaviors using the NOW WHAT? Strategy. Additionally, the study served as a field test for the lesson package. Thirty-seven middle school students with disabilities participated in an author-created, 12-lesson package over a six-week period. Student-reported levels of self-advocacy were measured pre- and post-intervention using the Self-Advocacy Measure for Middle School (SAMMS). Pre- and post-intervention interviews were used to collect data on student perceptions of their ability to use self-advocacy in the general education setting. Quantitative results indicated student knowledge of self-advocacy increased but did not generalize to the general education classroom. Qualitative data provided some insight into the lack of change observed
An integrated approach for financial and environmental cost optimisation of heating services
No full textA four-year project has started in 2007 to develop a methodology that can be applied to optimize the Belgian dwelling stock. The aim of the project is to optimise buildings concerning their environmental impact, their financial cost and the quality they offer over the whole life cycle, from the production of primary raw materials to the final demolition and end-of-life treatment. In the first phase of the project the optimisation methodology is developed; i.e. environmental impacts are analysed by means of life cycle assessment (LCA); financial costs are calculated based on life cycle cost analyses (LCC); and the quality evaluation is based on multi-criteria analyses (MCA). The aim of the optimization is to realize the highest marginal quality improvement for the additional financial and environmental cost. In a second phase the developed methodology is translated into a work instrument and applied to different dwelling types. This paper goes more deeply into the role heating services play in the environmental and financial costs. For a typical Belgian dwelling initial and life cycle costs for commonly used as well as advanced heating configurations are compared. Since energy consumption for heating is dependent of the way the building envelope is built, the analysis is performed on two dwelling configurations with a different insulation level
