The introduction of Heritage Building Information Modeling (HBIM) and 3D laser digitization is seen as a steppingstone toward heritage conservation and enhancing the intangible value of cities worldwide. However, the limit on experience labors, equipment investment budget, and the concealment of firms in a competitive field constrain the approach to digital heritage in Vietnam. Therefore, this study aims to (1) generate the optimal and specific workflow for the practical application of 3D Laser Scanning in heritage, from data capturing to processing and Scan-to-HBIM; (2) evaluate the potential application of Scan-to-HBIM and Hi-tech integration in the tangible cultural heritage preservation. This study applies Scan-to-HBIM to an ancient building in Vietnam, beginning with a reconstructed BIM of the structure and integrating it with current Hi-tech technologies for operations and maintenance, and tourism promotion. The primary result of the study is a practical workflow for CH digitization and management that details personnel requirements, implementation processes, and quality controls. Besides, the limitations and common errors encountered when applying technology in this field are discussed, and specific solutions are provided. This study contributes to resolving the practical issues encountered in historical scanning projects from Scan-to-HBIM.

Purpose: This paper develops the CDE of a BIM-based DT for real-time construction pollution management in building renovation projects. The system facilitates efficient construction pollution data management and shares important information among project stakeholders. Design/methodology/approach: In this paper, a comprehensive literature review and in-person interviews with nine experts from three main domains, namely, construction management, building information modelling and internet of things (BIM-IoT) integration and digital twin (DT) technology, and environmental management, outlined the development of a database in accordance with the project owner's requirements. The common data environment (CDE) workflow and solution were designed to create a DT, which was applied to an actual building renovation project to demonstrate data collection, integration, visualisation, and analysis. A time-series analysis was performed to evaluate the project's environmental impact. Findings: The CDE workflow and solution of the DT platform can improve project stakeholder collaboration, data sharing, and document control. The application of the proposed DT demonstrates how it can be used to monitor the impact of renovation activities on pollution levels in the vicinity of the site. The platform can assist project stakeholders in decision-making on various issues, including the management of evidence-based actions. Pollutant concentrations and other environmental conditions can be visualised in real time within their functional and spatial contexts by integrating time-stamped sensor streams into BIM-based platforms. This features the system's effectiveness in real-time monitoring. In addition, these insights pinpoint potential health risks and highlight the need for more substantial regulatory compliance. Originality/value: This research fills knowledge gaps by systematically modelling the flow of static and dynamic information in the CDE of the DT platform. The paper proves that the proposed CDE and BIM-based DT are practical and can be implemented in actual construction projects efficiently.

Numerous construction companies consider the work of addressing deficiencies, defects, and controlling volume amid construction projects is time-consuming, high-price, and to be one of the most challenging issues confronted by project management. The manual quality assurance programs currently used have certain restrictions, counting the lack of consistency in programs and human errors. Hence, one vital requirement is a need for integrated digital models that utilize new technologies and methods. As a result, BIM and 3D Laser Scanning have risen as helpful technology in transferring data to the digital module and processing create spatial objects. By adopting the integration of the BIM model and 3D Laser Scanning advantageous, the accuracy and efficiency of the quantity management process can be improved. This paper presents six case studies where (1) observes the current status of conventional methods in QA, QC; (2) demonstrates overview tasks for the integrated application; (3) determines the benefits and shortcomings of the integration; (4) identifies the workflow; (5) applies and evaluates the proposed workflow for real projects; and (6) evaluates the orientation of research.

In this study, we introduce a novel design of a remote edge-lit backlight structure featuring blue laser diodes (LDs). These LDs were integrated into a remote yellow phosphor layer on a light guide plate (LGP). Blue light emitted by the LDs passes through the LGP and spreads to the remote phosphor layer, generating white light output. Owing to the incorporation of a scattering layer between sequential LGPs, the remote edge-lit backlight structure facilitates the expansion of the output surface of the LGP by combining multiple individual LGPs. Two- and three-LGP remote edge-lit backlight structures demonstrated acceptable white illuminance uniformity. The proposed architecture serves as a viable solution for achieving uniform illumination in planar lighting systems using blue LDs; thus, this structure is particularly suitable for linear lighting or slender backlighting instead of display stand applications.