In recent years, environmental problems have become more prominent in the construction industry. The production and use of building materials are still one of the main reasons for various ecological and environmental challenges in the industry. Compared with traditional building materials, green building materials are environmentally friendly. Therefore, the adoption of green building materials in the construction industry can generally solve the industry’s ecological and environmental problems and promote green and low-carbon development. Research on contractors’ green procurement behaviour can promote the construction industry’s sustainable development. Many scholars discuss and agree that the implementation of e-procurement is a green approach towards sustainable construction. However, current evidence indicates that procurement stakeholders, especially contractors, are struggling to implement e-procurement effectively. Therefore, there is a need to study contractors’ behaviour in relation to green e-procurement. In response, this study investigates the adoption of e-procurement by Malaysian contractors by adopting planned behaviour theories and diffusion of innovations in their decision-making process. Here, a conceptual framework has been developed which focuses on factors influencing contractors’ adoptions. The framework can be used for understanding the contractors’ adoption decision of e-procurement. The result will help to find the critical key factors affecting green procurement behaviour from contractors’ perspectives and extend the theories further. This framework is also in tandem with the Construction Industry Development Board (CIDB), Construction 4.0 Strategic Plan (2021-2025) in identifying critical factors that affect the adoption of green procurement on construction projects.
The current trend of urbanization forces building development in urban areas, but the limitation of land in the area forces the development to be conducted upwards instead of sideways; thus, high-rise buildings will continue for decades. The façade of a high-rise building plays the most significant role in connecting the indoors and outdoors, therefore, having the most direct effect on the surrounding environment. Nowadays, glass is one of the most popular materials used in a high-rise building’s façade. The abundance of high-rise buildings with glass façades is also found in the Jakarta Metropolitan Area. However, the climate condition of the Jakarta Metropolitan Area proposes challenges in designing high-rise buildings with glass façades to accommodate outdoor human comfort. This study aims to review whether people achieve human comfort in an outdoor area of high-rise buildings with glass façades in the Jakarta Metropolitan Area. Using literature review through content analysis, this study found that theoretically, high-rise building with glass façade does not naturally respond to the climate condition of the Jakarta Metropolitan Area in providing human comfort. However, human psychological factors need to be considered in determining whether a condition is perceived as comfortable, as occupants of an outdoor environment have different expectations than those indoors. Thus, further assessments need to be conducted to determine whether developing high-rise buildings with a glass façade is appropriate to support outdoor human comfort in the Jakarta Metropolitan Area.
Earlier investigations on passive cooling methods applied software modelling, and the findings were not confirmed through field measurement. Hence, this study applied a stationary experiment on a real structure and weather conditions employing horizontal sun shading (SDH). The purpose of this study was to compare the performance of fixed passive sun-shading devices put on to the bare façade of three-story terrace shophouses in Malaysia. The experiment findings revealed that SDH significantly improved the internal thermal environment by lowering the average monthly indoor air temperature (Ta) by 0.98 K and the peak temperature by 2.11 K. SDH is also effective during the warmest sunny days, lowering 1.23 K on average for the day. Meanwhile, SDH reduced the temperature in the control room by 5.40 K during the warmest peak time.When it came to indoor mean radiant temperature (Tmrt), SDH performed better than the control room in the very hot peakover a month (2.38 K) and on the highest temperature of the day (7.70 K). Finally, it can be inferred that SDH worked better from late at night until early in the morning, cooling the room temperature faster. This quiescent choice is one of the best for enhancing a building's internal thermal performance while also possibly contributing to a decrease in operational energy consumption.
The existence of public open spaces make a city more vibrant and sustainable for the local population. However, there are still abandoned spaces that are not fully utilized such as spaces under the bridges and flyovers; despite having great potential to be developed for the public use. These abandoned spaces under the bridges have severed the network of connections between neighbouring areas and can become a potential place for social ills and criminal activities. In terms of urban planning, these have resulted in “lost spaces” that can further deform the existing urban fabric. Therefore, this research is conducted to identify the quality and to study the potential typology of public open spaces under bridges and flyovers. The area for this research is conducted at Pasar Seni LRT Station, Kelana Jaya Line in Old Town Kuala Lumpur. All the data for this research paper are collected through qualitative methods such as field studies and observation and quantitative methods such as questionnaires provided to users to gauge their opinions about the public open space under the bridge at the station. This research paper also includes brief interview and photographic documentation as study material to identify the quality of this open space in terms of accessibility, variety, legibility, robustness, safety and identity and meaning. The findings from this research shows that although the bridge and flyover facilitates and accelerates the movement of the public, at the same time this facility have created abandoned spaces that can be further developed for the interest and convenience of the public. Through this research paper, the relevant authorities can fully identify the potential of this public open space that can later be developed into additional facilities and used by the public and other visitors in the area.
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