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Green building research in South Africa:A scoping review and future roadmaps

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Energy and Built Environment 2024年第2期5卷 316-335页

作者： Favour D.Agbajor Modupe Cecilia Mewomo department of Construction Management and quantity surveying Durban University of TechnologySteve Biko CampusDurban4001South Africa

The construction industry is recognised to pose serious environmental threats due to its anthropogenic *** confront this challenge,green building has been famed as an auspicious strategy to alleviate energy-related carbon emissions alongside climate change ***,it has birthed diverse empirical studies and holistic reviews by the research ***,these previous studies have been carried out from a global and continental viewpoint regardless of the green building development specifically in emerging *** present study seeks to fill the sparse research upshots on the synthesis of green building research at the country level with core focus on South *** this light,the current study provides a scoping overview of the intellectual exploration on green building research in the South African *** study’s findings highlight the varying growth regarding the subject matter,the drivers,drawbacks,and socio-economic issues confronting in developing green building projects in the *** optimize the advancement of green building in the region,this study recommends the implementation of financing schemes,utilization of advanced digital technologies,and promotion of green and sustainable building curricula across the institutions as well as post-occupancy-related studies within the green building spectrum towards a safe and salutogenic built-environment in the country.

关键词： Green building Sustainable construction Energy efficiency Review South Africa

Assessing the adequacy and sustainability performance of multi-family residential buildings in Anambra State,Nigeria

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Regional Sustainability 2021年第1期2卷 23-35页

作者： Peter Uchenna Okoye Chukwuemeka Ngwu department of Building Nnamdi Azikiwe UniversityAwka420007Nigeria department of quantity surveying Nnamdi Azikiwe UniversityAwka420007Nigeria

The proliferation of multi-family residential building in Anambra State of Nigeria due to increasing demand without recourse to performance has broughtconcerns about the adequacy and sustainability of this housing *** study therefore,assessed the adequacy and sustainability performance of multi-family residential buildings in urban areas of Anambra *** study sampled the opinions of 384 households living in multi-family residential buildings through a questionnaire *** conducted data analysis based on 214 responses that were useful for *** study found that internal and building component variables and supporting neigh-borhood variables were adequate,but the surrounding environment variables were inadequate based on Mean Score ***,based on Sustainability Performance Index,the occupant sperceived social sustainability performance of the buildings as satisfactory,while environmental and economic sustainability performance were perceived as fairly *** Pearson correlation coefficient result further established that adequacy of internal and building component variables was significantly and positively related to the residents'perceived social sustainability *** of the surrounding environmental variables was also found to be positively and significantly related to the residents'perceived environmental sustainability performance,whereas adequacy of supporting neighborhood facilities was found to be negatively and significantly related to the residents’perceived economic sustainability *** sug-gested that investors and owners of multi-family residential buildings should direct more efforts towards improving the surrounding environment to supplements other facilities and increase the economic benefit of the renters or occupiers with increasing economic sustainability performance in terms of value for money.

关键词： Adequacy level Economic sustainability Environmental sustainability Social sustainability Multi-family residential building Residential building

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Assessment of energy utilization and leakages in buildings with building information model energy

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Frontiers of Architectural Research 2017年第1期6卷 29-41页

作者： Egwunatum I. Samuel Esther Joseph-Akwara Akaigwe Richard department of quantity surveying Delta State Polytechnic Ozoro 334111 Nigeria department of Civil Engineering Delta State Polytechnic Ozoro 334111 Nigeria department of Building PIc Lagos State Nigeria

Given the ability of building information models （BIM） to serve as a multidisciplinary data repository, this study attempts to explore and exploit the sustainability value of BIM in delivering buildings that require less energy for operations, emit tess carbon dioxide, and provide conducive living environments for occupants. This objective was attained by a critical and extensive literature review that covers the following：（1） building energy consumption, （2） building energy performance and analysis, and （3） BIM and energy assessment. Literature cited in this paper shows that linking an energy analysis toot with a BIM model has helped project design teams to predict and create optimized energy consumption by conducting building energy performance analysis utilizing key performance indicators on average thermal transmitters, resulting heat demand, lighting power, solar heat gains, and ventilation heat losses. An in-depth analysis was conducted on a completed BIM integrated construction project utilizing the Arboleda Project in the Dominican Republic to validate the aforementioned findings. Results show that the BIM-based energy analysis helped the design team attain the world＇s first positive energy building. This study concludes that linking an energy analysis tool with a BIM model helps to expedite the energy analysis process, provide more detailed and accurate results, and deliver energy-efficient buildings. This study further recommends that the adoption of level 2 BIM and BIM integration in energy optimization analysis must be demanded by building regulatory agencies for all projects regardless of procurement method （i.e., government funded or otherwise） or size.

关键词： Building informationmodeling Building energy per-formance analysis Sustainability Energy efficiency

Utilisation of green urban space for food sufficiency and the realisation of the sustainable development goals-UK stakeholders perspective

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Geography and Sustainability 2024年第1期5卷 13-18页

作者： Alex Opoku Anna Duff Moohammed Wasim Yahia Samuel Ekung department of Architectural Engineering College of EngineeringUniversity of SharjahUAE UCL Bartlett School of Sustainable Construction University College LondonLondonUK department of quantity surveying University of UyoUyoNigeria

The exponential growth of food demand due to the increasing global population has the potential to seriously threaten the quality and quantity of food supplies due to climate *** study explores the utilisation of green urban spaces for achieving food self-sufficiency by investigating the extent to which sustainable urban farms could be used to reduce the consumption of imported produce in the *** also examines urban farming stakeholders'perspective on how food self-sufficiency can help realise the SDGs especially SDG 2(Zero hunger)and SDG 13(Climate action).The study adopts a mixed method approach through a survey with 115 respondents and semi-structured interviews conducted with 12 respondents from 4 different urban farming stakeholder *** findings of this study presented a strong correlation between stakeholders who had concerns about where their food came from and the carbon footprint of imported *** research shows that,urban farms will no doubt play a vital role in the future of food security in our cities/communities and that the SDGs could be realised through sustainable urban farms implemented within the relevant planning regulations/policies.

关键词： Cities Food sufficiency Green urban space Urban farms SDGS

Global characteristics of the second-order ionospheric delay error using inversion of electron density profiles from COSMIC occultation data

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Science China(Physics,Mechanics & Astronomy) 2014年第2期57卷 365-374页

作者： WANG Hu WANG Cheng WANG JieXian DANG YaMing BAI GuiXia WANG QianXin Chinese Academy of surveying and Mapping department of surveying and Geo-informatics TongJi University department of Electrical and Computer Engineering Miami University

It is a well known fact that ionospheric delay error is a predominant factor which influences the positioning accuarcy of *** the main part of the first-order ionospheric delay error can be removed by the frequency-dependent behaviors of the ionosphere,the second-order ionospheric delay error must be eliminated to achieve millimetre-scale positioning *** to COSMIC occultation providing electron density profiles on the global scale,the paper presents the first-order and the second-order ionospheric delay error analysis on the global scale using the inversion of electron density profiles from COSMIC occultation data during 2009–***,because of the special geographical location of three ISR(incoherent scatter radar),the first-order and the second-order ionospheric delay errors are calculated and discussed;the paper also shows and analyzes the diurnal,seasonal,semi-annual variation of ionospheric delay error with respect to signal *** show that for the L1 signal path,the first-order ionospheric delay error is the largest near the equator,which is circa 7 m;the maximum second-order ionospheric delay error are circa 0.6 cm,0.8 cm and 0.6 cm respectively for L1 signals coming from the zenith,the north and the south at 10 degree elevation *** second-order ionospheric delay error on the L1 signal path from zenith are the symmetry between 15°and 15°with respect to magnetic equator,and are nearly zero at the magnetic *** the first time,the second-order ionospheric delay error on the global scale is presented,so this research will greatly contribute to analysing the higher-order ionospheric delay error characteristics on the global scale.

关键词： ionosphere GPS COSMIC ISR IGRF

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Smart contract applications in the built environment: How prepared are Nigerian construction stakeholders?

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Frontiers of Engineering Management 2024年第1期11卷 50-61页

作者： Andrew EBEKOZIEN Clinton AIGBAVBOA Samuel Adeniyi ADEKUNLE Mohamad Shaharudin SAMSURIJAN John ALIU Bernard Martins ARTHUR-AIDOO Godpower Chinyeru AMADI department of Construction Management and quantity surveying University of JohannesburgJohannesburg 2006South Africa School of Social Sciences Universiti Sains MalaysiaGelugor11800 USM PenangMalaysia department of quantity surveying Auchi PolytechnicAuchiNigeria Institute for Resilient Infrastructure Systems College of EngineeringUniversity of GeorgiaAthensGA 30602USA department of Building Technology Faculty of Built EnvironmentAccra Technical UniversityAccraGhana Nigerian Institute of Management Port HarcourtNigeria

Studies have demonstrated that advanced technology,such as smart contract applications,can enhance both pre-and post-contract administration within the built environment *** contract technology,exemplifying blockchain technologies,has the potential to improve transparency,trust,and the security of data transactions within this ***,there is a dearth of academic literature concerning smart contract applications within the construction industries of developing countries,with a specific focus on ***,this study seeks to explore the relevance of smart contract technology and address the challenges impeding its adoption,offering strategies to mitigate the obstacles faced by smart contract *** investigate the stakeholders,this research conducted 14 virtual interview sessions to achieve data *** interviewees encompassed project management practitioners,senior management personnel from construction companies,experts in construction dispute resolution,professionals in construction software,and representatives from government construction *** data obtained from these interviews underwent thorough analysis employing a thematic *** study duly recognizes the significance of smart contract applications within the *** the 12 identified barriers,issues such as identity theft and data leakage,communication and synchronization challenges,high computational expenses,lack of driving impetus,excessive electricity consumption,intricate implementation processes,absence of a universally applicable legal framework,and the lack of a localized legal framework were recurrent impediments affecting the adoption of smart contract applications within the *** study also delves into comprehensive measures to mitigate these *** conclusion,this study critically evaluates the relevance of smart contract applications within the built environment,with a specific focus on promoting their *** may serve

关键词： built environment industry digitalization Nigeria smart contract technological revolution

Global precision analysis of carrier phase relative positioning in BeiDou navigation satellite system and United States global positioning system

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Science China Earth Sciences 2019年第4期62卷 733-749页

作者： Letao ZHOU Dingfa HUANG Wei FENG Wu CHEN Xi ZHANG Li YAN department of surveying and Geo-Informatics Faculty of Geosciences and Environmental EngineeringSouthWest JiaoTong University department of Land surveying and Geo-Informatics Hong Kong Polytechnic University

In this paper, we derived a high-efficiency formula for calculating the precision of carrier phase relative positioning,analyzed the various factors that affect the positioning accuracy using the carrier phase, and proposed the concept of using a frequency dilution of precision to describe the quantitative effect of different frequency combinations on the positioning precision. To this end, we computed and plotted the global spatial distribution map of the relative positioning dilution of precision for single-day solution, half-hour solution, and single-epoch solution of the global positioning system(GPS), regional Beidou navigation satellite system(BDS2), future global Beidou navigation satellite system(BDS3), and their fusion *** processing software with autonomous intellectual property rights(GCN and VENUS/ARSNet), we solved the measurement data and examined the positioning precision of the single-day solution and single-epoch solution of GPS and *** analysis demonstrated that the B1/B2 frequency positioning precision of BDS2 was better than that of L1/L2 frequency positioning of GPS, but the positioning precision of the BDS2 is worse than that of GPS over most of the service region of the BDS2. Further, the positioning precision of BDS3 is better than that of GPS in the Asia-Pacific region, while it is the opposite in other regions. Based on these conclusions, we put forth some optimization recommendations regarding the signal frequency of the navigation system and GPS measurement standards to serve as references for optimizing the system performance and formulating standards.

关键词： BeiDou navigation satellite system Relative positioning Dilution of precision Frequency dilution of precision Spatial-temporal availability

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On the Profiling of Air Leakage Infiltration Pattern across Chinese Vernacular Buildings

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Journal of Smart Buildings and Construction Technology 2023年第1期5卷 29-51页

作者： Samuel I.Egwunatum Udubra E.Akpezi Osamudiamen K.Otasowie Imole A.Awodele department of quantity surveying Federal University of TechnologyOwerri460114Nigeria department of Civil Engineering Delta State University of Science and TechnologyOzoro334113Nigeria department of quantity surveying Durban University of TechnologyDurban4000South Africa

The purpose of this paper is to provide understanding of the seasonal pattern of air leakage(infiltration)in Chinese vernacular buildings across China’s five climate *** achieving the set purpose,a grand extensive literature survey was conducted and supported with data drawn from established Meteonorm V6.1 on sensible heat and psychrometric *** computations for normalized and specific infiltration from stack effects followed the Gowri method in line with ASHRAE reference *** energy admittance into building followed Bouger’s model form Angstrom *** the distribution of vernacular buildings across five climate regions of China,evidence from computational and numerical values showed symmetries in terms of minimums and maximums times of ***,a reciprocal pattern exists between solar radiative admittance and region’s temperature *** that Chinese vernacular building heritage extended to further Asia,this research became limited to only the Chinese *** became difficult to report if the construction culture away from China has correlation with infiltration and energy admittance *** works on Chinese climate and vernacular dwellings reported a climate responsive dwelling designed by passive cooling strategy;a gap was closed by extending the previous work to specific infiltration pattern and energy admittance *** vernacular buildings by virtue of research outcomes are and should be adoptable to modern housing needs for cultural integration.

关键词： Infiltration Vernacular building Seasonal pattern Psychrometric Solar radiation Admittance

A general method of spatio-temporal clustering analysis

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Science China(Information Sciences) 2013年第10期56卷 158-171页

作者： DENG Min LIU QiLiang WANG JiaQiu SHI Yan department of surveying and Geo-informatics Central South University

Spatio-temporal clustering has been a hot topic in the feld of spatio-temporal data mining and knowledge *** can be employed to uncover and interpret developmental trends of geographic phenomenon in the real ***,existing spatio-temporal clustering methods seldom consider both spatiotemporal autocorrelations and heterogeneities among spatio-temporal entities,and the coupling in space and time has not been well *** this paper,a unifed framework for the clustering analysis of spatio-temporal data is proposed,and a novel spatio-temporal clustering algorithm is developed by means of a spatio-temporal statistics methodology and intelligence computation *** method is applied successfully to fnding spatio-temporal cluster in China’s annual temperature database for the period 1951 1992.

关键词： spatio-temporal clustering spatio-temporal autocorrelation spatio-temporal heterogeneity spatio-temporal data mining