Data integration for quantitative analysis of sustainability

The development of an integrated data repository for urban sustainability analysis is presented; it aims to enhance quantitative analysis of urban sustainability on real statistical data with relevant geographic references. The method is complementary to qualitative and quantitative analyses of sample data, which are the main approaches adopted in conventional urban sustainability analysis. The paper highlights the background and importance of using statistical data for urban planning and analysis. Selected statistics sources and various geospatial objects relevant to the geo-references of the statistical data are reviewed. The conceptual model of the integrated data repository is described and the logical integration of statistics from different sources is illustrated. The detailed geospatial conceptual model shows the geospatial classes, main attributes and relationships between these geospatial classes. The paper details the procedure of setting up a server-based database to host both geospatial and non-geospatial data, and uses PostGIS query to interrogate geospatial information in the database, including how to convert the database tables from other formats. A geographic information system (GIS) is introduced as a user-side tool to reveal geospatial and non-geospatial data. Case studies of application of the database for urban sustainability analysis are described. Data maps generated for these case studies can assist planning and design professionals in analysing some urban sustainability issues. Potential applications in various sustainability analyses, barriers and future improvements are also discussed

Implementation of web-based virtual reality technology in public participation

Urban planning and design processes involve the participation of various stakeholders, who mostly are lay people in planning and design. Thus, a crucial way to get the support of those lay people is to provide a visual and comprehensible media to represent the planning and design outcomes, which enable them to understand the planning and design directly. Virtual reality (VR) technology is an advanced visualisation technology with the characteristics of dynamic and realistic 3D visualisation, interactively navigation and web-delivery. It has been used in many aspects of urban design and management to represent the objects and phenomenon of the urban environment. This paper presents a study of comprehensively implementing VRML (Virtual Reality Modelling Language) and web-based databases to represent 3D urban models of the master planning of the west Cambridge University Campus. This aims to facilitate web-based participatory consultation to allow staff, students and local residents to learn about and debate the planning and building proposals. Interactive 3D virtual reality models were created of a number of proposed urban development projects in Cambridge and published on the University web site along with mechanisms for surveying users’ opinions of the proposals. These were linked to relational databases on the web server for recording survey responses. Care was taken to provide the participants with a friendly interface and interactive functions to easily navigate the model and accurately understand the issues involved. This paper starts with reviewing the theory and practice of implementing virtual reality visualisation for public participation in urban design. The technical details of creating the 3D virtual reality models, merging them into the web site and linking objects in the virtual reality model with databases, are described. Finally the advantages of, and the barriers to, this kind of virtual reality application are addressed

A critical review of sustainable built environment development in Iran

Population explosion, irresponsible consumerism, environmental catastrophes, tremendous market-based urban development and the dedication of cities to cars and concrete rather than citizens and environment has put a big question mark over the future of the world’s developing countries. Urban sustainability has emerged as the only solution to the environmental, social and economic challenges facing our cities. In recent years in countries struggling with the concept of urban sustainability, such as Iran, academic circles and the state have had heated debates over sustainable development. The purpose of this paper is to examine the current situation of sustainable development of the built environment in Iran. The focus is on recognition of urban governance, policies and regulations. The paper examines the scope of sustainable technologies employed in Iran in terms of the development of energy efficiency and renewable energies. This is followed by an investigation of urban sustainability assessment methods through which the paper tackles policy, technology and assessment mechanism issues from a perspective of sustainable built environment development in both theoretical research and practical development in Iran

Using virtual reality technology to facilitate web-based public participation

Virtual reality as an advanced visualisation technology is used in many aspects of urban design and management to assist the various stakeholders’ better understanding of the urban environment. This paper is based on an EPSRC funded research project – “Web-Based Participation for Campus-Scale Project Design: The West Cambridge Site”, which aims to facilitate web-based participatory consultation to allow staff, students and local residents to learn about, and debate, planning and building proposals by Cambridge University. Interactive 3D virtual reality models were created of a number of proposed urban development projects in Cambridge and published on the University web site along with mechanisms for surveying users’ opinions of the proposals. These were linked to relational databases on the web server for recording survey responses. Care was taken to provide the participants with a friendly interface and interactive functions to easily navigate the model and accurately understand the issues involved. This paper starts with reviewing the theory and practice of implementing virtual reality visualisation for public participation in urban design. The technical details of creating the 3D virtual reality models, merging them into the web site and linking objects in the virtual reality model with databases, are described. Finally the advantages of, and the barriers to, this kind of virtual reality application are addressed

New Family of Robust 2D Topological Insulators in van der Waals Heterostructures

We predict a new family of robust two-dimensional (2D) topological insulators in van der Waals heterostructures comprising graphene and chalcogenides BiTeX (X=Cl, Br and I). The layered structures of both constituent materials produce a naturally smooth interface that is conducive to proximity induced new topological states. First principles calculations reveal intrinsic topologically nontrivial bulk energy gaps as large as 70-80 meV, which can be further enhanced up to 120 meV by compression. The strong spin-orbit coupling in BiTeX has a significant influence on the graphene Dirac states, resulting in the topologically nontrivial band structure, which is confirmed by calculated nontrivial Z2 index and an explicit demonstration of metallic edge states. Such heterostructures offer an unique Dirac transport system that combines the 2D Dirac states from graphene and 1D Dirac edge states from the topological insulator, and it offers new ideas for innovative device designs

Analysis of crucial molecules involved in herniated discs and degenerative disc disease

OBJECTIVES: Herniated discs and degenerative disc disease are major health problems worldwide. However, their pathogenesis remains obscure. This study aimed to explore the molecular mechanisms of these ailments and to identify underlying therapeutic targets. MATERIAL AND METHODS: Using the GSE23130 microarray datasets downloaded from the Gene Expression Omnibus database, differentially co-expressed genes and links were identified using the differentially co-expressed gene and link method with a false discovery rate ,0.25 as a significant threshold. Subsequently, the underlying molecular mechanisms of the differential co-expression of these genes were investigated using Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis. In addition, the transcriptional regulatory relationship was also investigated. RESULTS: Through the analysis of the gene expression profiles of different specimens from patients with these diseases, 539 differentially co-expressed genes were identified for these ailments. The ten most significant signaling pathways involving the differentially co-expressed genes were identified by enrichment analysis. Among these pathways, apoptosis and extracellular matrix-receptor interaction pathways have been reported to be related to these diseases. A total of 62 pairs of regulatory relationships between transcription factors and their target genes were identified as critical for the pathogenesis of these diseases. CONCLUSION: The results of our study will help to identify the mechanisms responsible for herniated discs and degenerative disc disease and provides a theoretical basis for further therapeutic study

Research on the influence of abrupt climate changes on the analysis of typical meteorological year in China

The conventional, typical meteorological year (TMY) based on continuous-year original meteorological records without considering abrupt climate changes (ACC) may not be able to represent a real “typical” climate properly. Consequently, building performance analyses and simulations based on TMY may be not accurate. Current research rarely tackles this issue in TMY development. This paper presents an innovative TMY development with the consideration of ACC in the original meteorological records. It is based on the Chinese standard weather database method (CSWD) with the meteorological records of six Chinese cities in different climate zones. It applies the Moving t-test method to identify and exclude ACC points and to refine the timescales for TMY development. It also depicts the development of individual typical meteorological months again with the ACC impact to improve the accuracy of TMY. The method has been verified in several building energy consumption and thermal comfort analyses. The results demonstrate that the analysis based on the new TMY climate datasets when considering ACC will end up with less energy consumption and better thermal performance compared to the analyses based on the conversion dataset without considering ACC. This experimental research will refine TMY development, and further improve building energy performance analysis and design

Whole‐Life Embodied Carbon Reduction Strategies in UK Buildings: A Comprehensive Analysis

This paper presents a detailed analysis of embodied carbon (EC) in various case studies using life cycle assessment (LCA) methodology. Through comprehensive assessments, including modules A, B and C, the study evaluates EC across different stages of building life cycles. This study also considers the EC savings achievable through current end-of-life strategies in the UK context. As Module A accounts for the highest EC in the case studies, the majority of reduction strategies should focus on this stage. The most impactful strategy for reducing EC emissions involves incorporating Ground Granulated Blast Furnace Slag (GGBS) as a replacement for cement. This approach has the potential to achieve a substantial reduction in the EC of concrete within the buildings under investigation, ranging from 60% to 70%. The study reveals that specification strategy can lead to significant Whole Life Embodied Carbon (WLEC) reductions, with the residential building achieving a 30.59% reduction, the college building a 46.86% reduction, and the hotel building a reduction of 23.69%. Effective mitigation strategies, such as utilizing recycled and reclaimed materials, demonstrate promising results, showcasing significant reduction in WLEC emissions in the buildings

An indoor environmental quality study for higher education buildings with an integrated BIM-based platform.

Indoor environmental quality (IEQ) of higher education (HE) buildings significantly impacts the built environment sector. This research aimed to optimize learning environments and enhance student comfort, especially post-COVID-19. The study adopts the principles of Post-occupancy Evaluation (POE) to collect and analyze various quantitative and qualitative data through environmental data monitoring, a user perceptions survey, and semi-structured interviews with professionals. Although the environmental conditions generally met existing standards, the findings indicated opportunities for further improvements to better support university communities’ comfort and health. A significant challenge identified by this research is the inability of the facility management to physically manage and operate the vast and complex spaces within HE buildings with contemporary IEQ standards. In response to these findings, this research developed a BIM-based prototype for the real-time monitoring and automated control of IEQ. The prototype integrates a BIM model with Arduino-linked sensors, motors, and traffic lights, with the latter visually indicating IEQ status, while motors automatically adjust environmental conditions based on sensor inputs. The outcomes of this study not only contribute to the ongoing discourse on sustainable building management, especially post-pandemic, but also demonstrate an advancement in the application of BIM technologies to improve IEQ and by extension, occupant wellbeing in HE buildings

Acoustofluidic Patterning inside Capillary Tubes Using Standing Surface Acoustic Waves

Acoustofluidic platform has great potentials to integrate capillary tubes for controlling and manipulating microparticles and biological cells in both non-flowing and continuous-flow settings. In order to effectively manipulate microparticles/cells inside capillary tubes, it is essential to fully understand and control the patterns generated inside the capillary tubes with different cross-sections, and to investigate the influences of configuration and position arrangement of electrodes along with the capillary tubes. This paper aims to systematically investigate the patterning and alignment of microparticles inside glass capillary tubes using thin film surface acoustic wave (SAW) devices. Through both experimental studies and numerical modelling, effects of various cross-section geometries of the capillary tubes and their positioning with respect to the direction of interdigital transducers (IDTs) of the SAW device in both a stationary fluid and a continuous flow fluid were studied. Results showed that for the rectangular glass capillary tubes, the patterned lines of particles are parallel to the tube’s side walls, irrelevant to the tube positions along with the IDTs, which is mainly caused by the standing wave field generated inside the rectangular glass tube. Whereas for the circular glass capillary tubes, alignment patterns of particles are quite different along the tube’s height. At the bottom of the circular tube, particles are patterned into lines parallel to the tube direction, because the acoustic waves propagate into the water and form a standing wave along the direction of the circular tube. Whereas at the middle height of the tube, the particles are patterned into lines perpendicular to the tube direction, because the formed standing waves also propagate around the circular cross-section of the tube and are perpendicular to the tube direction. For the cases with a continuous liquid flow, under the agitation of acoustic waves, particles are patterned in lines parallel to the flow directions for both the rectangular and circular glass tubes, and the fluid flow enhances and smoothens the patterned lines of the particles