3,286 research outputs found
Circular construction and demolition waste?: Barriers and opportunities for creating circular business models in the EU C&DW sector
No full textThe main goal of this paper is to identify barriers and opportunities for creating the circular business models in the EU C&DW sector. Having in mind this fact, author of the paper describes market, social, governance and regulatory failures which may limit opportunities for achieving market success in the EU C&DW sector. The presentation will take into account current economic situation of the sector which is under the pressure of both global economic challenges and the EU policy aiming at popularization of the circular economy approach. As a result, different recommendations that may determine the final shape of the business models will be identified, including key resources that have to be used for successful commercialization of the different circular C&DW solutions
First photometric study of two southern eclipsing binaries IS Tel and DW Aps
No full text32nd International Physics Congress of Turkish-Physical-Society (TPS) -- SEP 06-09, 2016 -- Bodrum, TURKEYThe paper presents the first photometric analysis of two southern eclipsing binary stars, IS Tel and DW Aps. Their V light curves from the All Sky Automated Survey were modelled by using Wilson-Devinney method. The final models give these two Algol-like binary stars as having detached configurations. Absolute parameters of the components of the systems were also estimated.Turkish Phys So
Policy analysis of water management for the Netherlands. Vol VII: Assessment of impacts on drinking-water companies and their customers
No full textThis volume assesses the impacts of a number of water management policies developed by PAWN on drinking-water (DW) companies and their customers (households, commercial entities, and industrial firms). Chapter 2 summarizes briefly the major water-related problems facing DW companies in the Netherlands today, and shows why the author believes they will become more severe in the future. Chapter 3 describes the methodology in detail. Chapter 4 presents the impacts and associated discussion of PAWN's primary and groundwater cases on DW production, and on DW companies and their customers. Finally, in Chap. 5, the author assesses those impacts, draws some overall conclusions, and discusses the implications of those conclusions for the future supply and costs of DW in the Netherlands.PAW
Structural and dynamic basis of a supercoiling-responsive DNA element
No full textIn both eukaryotes and prokaryotes, negative supercoiling of chromosomal DNA acts locally to regulate a variety of cellular processes, such as transcription, replication, recombination and response to environmental stresses. While studying the interaction between the Hin recombinase and mutated versions of its cognate DNA-binding site, we identified a mutated DNA site that binds Hin only when the DNA is supercoiled. To understand the mechanism of this supercoiling-responsive DNA site, we used NMR spectroscopy and fluorescence resonance energy transfer to determine the solution structures and dynamics of three related DNA oligonucleotides. The supercoiling-responsive DNA site formed a partially unwound and stretched helix and showed significant flexibility and base pair opening kinetics. The single CAG/CTG triplet contained in this DNA sequence displayed the same characteristics as do multiple CAG/CTG repeats, which are associated with several hereditary neuromuscular diseases. It is known that short DNA sequence motifs that have either very high or low bending flexibility occur preferentially at supercoiling-sensitive bacterial and eukaryotic promoters. From our results and these previous data, we propose a model in which supercoiling utilizes the intrinsic flexibility of a short DNA site to switch the local DNA structure from an inefficient conformation for protein binding to an efficient one, or vice versa
Novel circular economy business model of high-added value products for energy efficiency: from C&DW to aerogels
No full textSince the Industrial Revolution, humanity’s use of natural resources has been basically the same: TAKE, MAKE and THROW AWAY; which consequently led to the indispensable problems of waste materials. Around 461 million tons of Construction & Demolition Waste (C&DW), excluding excavation materials, are yearly generated in EU28. This undoubtedly gives a call to novel closed-loop circular business models which reshape the Eco-system in a way the waste is 'designed out'. Here, we present a novel closed-loop circular economy model of a high-performance building insulation material from silica containing C&DW materials to silica aerogels with λ≈0.015 W/mK. In the present model, the benefit comes with the use of massive construction waste to a silica precursor and thereby aerogel production guaranteeing at least 40% product cost reduction and 40% reduction in energy consumption in real construction environment
Complete map of the genome of DW-7 bacteria.
No full textComplete map of the genome of DW-7 bacteria.</p
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