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"Materials Catalogs."
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Sustainable Built Environments: Building Information Modeling, Biomaterials, and Regenerative Practices in Mexico
This article explores how the construction sector can significantly contribute to minimizing its environmental impact through reuse and recycling practices, in rehabilitation or new construction projects. This research focuses on implementing BIM methodology alongside biomaterials, 3D modeling, and digitization in compliance with the Green Building Code. Two case studies located in Jalisco and Querétaro (Mexico) are examined through a comparative analysis. The simulations are carried out in different geographical areas with two construction systems that allow us to see the output similarities. The results show the clear advantages of biomaterials over traditional materials such as concrete. The construction materials are shown to determine their operational energy consumption. From an economic point of view, this study supports data regarding lower energy costs, and a significant reduction in CO2 emissions is observed. In conclusion, both the models and simulations, along with the Toolkit, highlight the benefits of biomaterials over conventional industrial materials.
Journal Article
Construction of regional building typologies with a material catalog
Purpose
The purpose of this paper is to develop a new building typology for: the estimation of heat demand of urban agglomerations; and the assessment of the environmental impact linked to urban re-development policies.
Design/methodology/approach
In order to: capture regional differences of urban areas; and describe individual building components of neighbourhoods, the author proposes the construction of a new building typology based upon a regional material catalog (Klauß et al. 2009a).
Findings
The main findings of this analysis are primarily on method. The author presents a method to estimate the building shell from available information on the digital cadastre and the first attempt to link material databases with a ranking algorithm. The analysis application presented in this paper shows that the embodied energy on insulation materials and the corresponding energetic payback time depends on the “real” building shell, making it important to accurately compute this value.
Practical implications
Results from this analysis present an heat demand urban model able to capture: regional differences, thanks to the use of the regional material catalog, local characteristics of the building stock, thanks to the detailed information of the digital cadastre, and ability to link building stock models with rich Live Cycle Inventory (LCI) databases for the explicit consideration of the embodied energy of retrofit measures. Further applications of the developed method could be used to assess new urban development plans of the city as well as financial incentives packages for building retrofits.
Originality/value
This analysis shows the first step towards the development of a new building typology constructed upon a regional material catalog. This innovation allows taking regional differences into account. Because the author uses a detailed catalog of building components, an accounting of embodied energy by linking data of a LCI database is possible. In this paper the author presents an application of the enriched data set, the presented example shows the needed embodied energy by adding an extra layer to the predefined building components of selected buildings of the digital cadastre.
Journal Article
Treasures from Native California
The brief Russian presence in California yielded some of the earliest ethnography of Native Californians and some of the best collections of their material culture. Unstudied by western scholars because of their being housed in Russian museums, they are presented here for the first time in an English language volume. Descriptions of early nineteenth-century travelers such as von Wrangel and Voznesenskii are followed by a catalog of objects ranging from hunting weapons to household objects to ritual dress to musical instruments, games, and gift objects. This catalog of objects includes over 150 images, many in full color. An essential volume for those interested in the ethnology, archaeology, art, and cultures of Native Californians.
eBook
Animal dietary exposure: overview of current approaches used at EFSA
At EFSA, animal dietary exposure estimates are undertaken by several Panels/Units to assess the risk of feed contaminants, pesticide residues, genetically modified feed and feed additives. Guidance documents describing methodologies for animal dietary exposure assessment are available both at EFSA and international levels. Although appropriate within pertinent regulatory frameworks, the methodologies used to assess animal dietary exposure vary across risk assessment areas. There are different approaches ranging from quick worst‐case estimations to more refined methods assessing actual exposure, resulting from the use of a heterogeneous selection of animal populations and default values to estimate feed intake. Furthermore, current feed classification systems in place at international and national levels contain a large and heterogeneous number of feed materials, which may benefit from further harmonisation efforts. This technical report presents an overview of the current approaches in place at EFSA to assess the exposure to chemicals in feed. The possibility for a greater harmonisation of feed classification and terminology is also addressed by comparing the structure of the EU catalogue of feed materials and the Harmonised OECD tables of feedstuffs derived from field crops with the EFSA FoodEx2 system.
Journal Article
Tangible things : making history through objects
Based on the rich museum collections of Harvard University, Tangible Things challenges rigid distinctions between history, anthropology, science, and the arts. Through 20 entertaining and inspiring case studies it demonstrates that almost any material thing, when examined closely, can be a link between present and past.
eBook
Catalogue of topological electronic materials
Topological electronic materials such as bismuth selenide, tantalum arsenide and sodium bismuthide show unconventional linear response in the bulk, as well as anomalous gapless states at their boundaries. They are of both fundamental and applied interest, with the potential for use in high-performance electronics and quantum computing. But their detection has so far been hindered by the difficulty of calculating topological invariant properties (or topological nodes), which requires both experience with materials and expertise with advanced theoretical tools. Here we introduce an effective, efficient and fully automated algorithm that diagnoses the nontrivial band topology in a large fraction of nonmagnetic materials. Our algorithm is based on recently developed exhaustive mappings between the symmetry representations of occupied bands and topological invariants. We sweep through a total of 39,519 materials available in a crystal database, and find that as many as 8,056 of them are topologically nontrivial. All results are available and searchable in a database with an interactive user interface.
Topological materials are thought to be scarce, but an algorithm that diagnoses nontrivial topology in nonmagnetic materials finds the opposite: more than 30 per cent of the 26,688 materials studied are topological.
Journal Article
A complete catalogue of high-quality topological materials
Using a recently developed formalism called topological quantum chemistry, we perform a high-throughput search of ‘high-quality’ materials (for which the atomic positions and structure have been measured very accurately) in the Inorganic Crystal Structure Database in order to identify new topological phases. We develop codes to compute all characters of all symmetries of 26,938 stoichiometric materials, and find 3,307 topological insulators, 4,078 topological semimetals and no fragile phases. For these 7,385 materials we provide the electronic band structure, including some electronic properties (bandgap and number of electrons), symmetry indicators, and other topological information. Our results show that more than 27 per cent of all materials in nature are topological. We provide an open-source code that checks the topology of any material and allows other researchers to reproduce our results.
Topological quantum chemistry and newly developed codes are used to analyse and compute the topological properties of materials in a large crystal database and to identify new topological phases, finding that more than 27 per cent of all materials in nature are topological.
Journal Article
Materials biography as a tool for designers' exploration of bio-based and bio-fabricated materials for the sustainable fashion industry
The fashion industry is highly responsible for critical environmental problems and the sector is increasingly aware of the urgent need to embark on a sustainable transition. Materials, primarily textiles, are particularly problematic for the sector's unsustainability, despite the intensive research into alternative solutions that is currently underway. This article presents a comprehensive analysis of these socio-environmental challenges and describes how governments, industry, and designers are seeking to address the situation. Furthermore, it identifies a panorama of alternative bio-based and bio-fabricated materials that could facilitate the transition toward more sustainable fashion. We present a selection of 24 case studies of newly developed bio-based and bio-fabricated materials and group them by their origin. Analysis of the cases led to the delineation of five \"materials biography categories\" to help understand the prominent narratives and to communicate their characteristics and fundamental attributes. This taxonomy also serves to support concepts for a circular economy by helping to build a sort of \"material passport\" or \"product biography,\" two concepts underpinning the outcome of this study, and emphasizes the need for tools to further the communication and traceability of these emergent materials. We propose \"materials biography,\" an overarching idea that catalogues essential dimensions and offer it to designers, companies, and final users to enhance their perception and awareness of such novel materials.
Journal Article