Construction labor productivity (CLP) is a critical measure of efficiency in the construction industry. This bibliometric review comprehensively analyzes global research trends in CLP monitoring over the past 56 years. The review identifies the top journals, authors, and nations contributing to this field and highlights a significant increase in publications since 2000. The co-authorship bibliometric map illustrates how different nations collaborate in research, with Europe and Asia being the most engaged regions in the study of CLP monitoring. The author keyword co-occurrence analysis indicated the need for more consistent and reliable measurements of CLP in the field. Furthermore, the review highlights the importance of factors such as occupational health and safety, change orders, and the adoption of lean construction principles and innovative technologies for monitoring and improving CLP. Finally, we evaluated the characteristics of different modeling approaches utilized in CLP monitoring studies, considering factors such as data availability, the complexity of relationships, and the required expertise. This study highlights the need for real-time and transparent CLP monitoring methods. Overall, this study contributes to the research field by offering insightful information on the current state of CLP monitoring and proposing potential future directions for research.

Flood has occurred many times in Malaysia and it has greatly affected the residents that live in flood risk area such as Bukit Merah. Due to the climate change and land use changes issues, the flood and drought events seem to be occurred more frequently in larger scale in Bukit Merah. Therefore, the objectives of this study were to develop the hydrologic model for Bukit Merah and to forecast the flood magnitude for next twenty years by considering the factor of climate change and land use changes via HEC-HMS. After developing the hydrologic model of Bukit Merah, the model has been calibrated and validated with the coefficient of determination, R2 = 0.9066 and 0.9575 respectively. The results showed that the simulated stream flow was closely fit to the observed streamflow, therefore it was reliable. Then, the model was used to simulate the streamflow for next twenty years by using predicted future rainfall data obtained from NAHRIM. The simulated peak discharge to the Bukit Merah Reservoir for next twenty years was 113.7 m3/s. Then, the scenarios of excess rainfall and extremely lack of rainfall were simulated. In extremely lack of rainfall scenario, the peak discharge to the Bukit Merah Reservoir decreased by 76.87 % while for the excess rainfall scenario, the peak discharge has increased 379 %. After that, the Curve Number (CN) of the basin has been increased by 20% and it was assumed to have 70% of impervious area according to the future development in Perak. Then, the model was simulated but the peak discharge to Bukit Merah Reservoir remain unchanged, recorded as 113.7 m3/s. Hence, this paper outlined that climate change has the biggest impact on the magnitude of streamflow but the land use changes do not give much effects to the magnitude of streamflow in Bukit Merah.

The global warming incremental impacts such as temperature, precipitation, rise in sea level, and extreme weather events are indeed being observed globally. In recent decades, energy demand and greenhouse gas emissions have increased due to buildings being designed with active cooling and heating solutions, despite global attempts to reduce energy consumption. About 50 percent of all energy use is attributed to buildings. There has been a debate for Decades on building active and passive design, but very limited studies have been carried out to confirm the Overall Thermal Transfer Value (OTTV) during the operation phase of the building. This paper highlights the analysis of OTTV in the Passive Design Strategies using several conditions of glazing facades. The passive design of glazing facade strategies includes the variation in opaque wall Colour with different values of the coefficient of solar absorption, change in glazing type (U-Value and Shading Coefficient), and the decrease in the size of the openings. Building parameters were collected and OTTV was determined using the equation in Malaysian Standard MS 1525 for Energy Efficiency. The OTTV was then compared to the recommended value for Malaysia’s tropical climate. Results showed that different paint Colours improved OTTV by up to 23.05%, changing glazing type reduced OTTV from 76.93 W/m² (Base case) to 64.12 W/m² (Double Low-E, e2=.1 Tint green), and reducing glass area by 10% lowered OTTV to 62.24 W/m².Whereas, by combining the Type of Glazing and White facade Colour the OTTV was reduced to 39.68%. It is concluded that this OTTV analysis enhances building energy efficiency and reduces cooling loads.