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123 results on '"Lam, Khee Poh"'

9. Performance evaluation of an agent-based occupancy simulation model

Author

Luo, Xuan, Lam, Khee Poh, Chen, Yixing, and Hong, Tianzhen

Subjects
Built Environment and Design, Engineering, Civil Engineering, Architecture, Building, Occupancy simulation, Occupancy pattern, Model performance evaluation, Verification, Occupant presence and movement, Occupant behavior, Environmental Science and Management, Building & Construction, Built environment and design
Abstract

Occupancy is an important factor driving building performance. Static and homogeneous occupant schedules, commonly used in building performance simulation, contribute to issues such as performance gaps between simulated and measured energy use in buildings. Stochastic occupancy models have been recently developed and applied to better represent spatial and temporal diversity of occupants in buildings. However, there is very limited evaluation of the usability and accuracy of these models. This study used measured occupancy data from a real office building to evaluate the performance of an agent-based occupancy simulation model: the Occupancy Simulator. The occupancy patterns of various occupant types were first derived from the measured occupant schedule data using statistical analysis. Then the performance of the simulation model was evaluated and verified based on (1) whether the distribution of observed occupancy behavior patterns follows the theoretical ones included in the Occupancy Simulator, and (2) whether the simulator can reproduce a variety of occupancy patterns accurately. Results demonstrated the feasibility of applying the Occupancy Simulator to simulate a range of occupancy presence and movement behaviors for regular types of occupants in office buildings, and to generate stochastic occupant schedules at the room and individual occupant levels for building performance simulation. For future work, model validation is recommended, which includes collecting and using detailed interval occupancy data of all spaces in an office building to validate the simulated occupant schedules from the Occupancy Simulator.

Published
2017

45. Computer-Based Performance Simulation for Building Design and Evaluation: The Singapore Perspective

Author

Lam Khee Poh, Wong Nyuk Hien, and Henry Feriadi

Subjects
Engineering, business.industry, 020209 energy, Perspective (graphical), 0211 other engineering and technologies, Computer based, General Social Sciences, 02 engineering and technology, Building design, Computer Science Applications, Engineering management, 021105 building & construction, 0202 electrical engineering, electronic engineering, information engineering, Systems engineering, business
Abstract

This article provides an overview of the usage of performance-based simulation tools for building design and evaluation in Singapore based on an extensive industry survey. It highlights the status and difficulties encountered in the usage and the needs of the industry for such tools. Recommendations are also given to promote the pervasive use of such simulation tools.

Published
2003

46. Attenuation of diffuse daylight due to dust deposition on glazing in a tropical urban environment

Author

Tham Kwok Wai, Lam Khee Poh, Peter Tregenza, MB Ullah, and Julius Tan Kurniawan

Subjects
Meteorology, Attenuation, 0211 other engineering and technologies, 02 engineering and technology, 01 natural sciences, Wind speed, 010309 optics, Glazing, Deposition (aerosol physics), 021105 building & construction, 0103 physical sciences, Transmittance, Environmental science, Daylight, Electrical and Electronic Engineering, Urban environment
Abstract

Transmittance of diffuse daylight by horizontal and vertical glazing was measured in a model placed in an exposed outdoor environment in Singapore for 41 weeks. Correction factors for sensor location were developed, and associations between transmittance and rainfall, wind speed and wind directional frequency were analysed. The paper discusses the interplay of forces for adhesion, resuspension and cleaning.

Published
2003

47. Advanced lighting simulation in architectural design in the tropics

Author

Wu Wei, Edward Ng, Takehiko Nagakura, and Lam Khee Poh

Subjects
Computer science, Architectural design, Building and Construction, computer.software_genre, Reflectivity, Daylighting design, Overcast sky, Control and Systems Engineering, Radiance, Computer Aided Design, Daylight, Louver, computer, Simulation, Civil and Structural Engineering, Remote sensing
Abstract

This paper outlines a 2-year research program that the team attempted to apply one of the most powerful computational lighting simulation softwares, radiance, to assist in the daylighting design of an actual building in the tropics. The validation studies, which were carried out in the Asian Civilisation Museum (ACM) in Singapore, showed that radiance can be used to predict the internal illuminance with a high degree of accuracy under overcast sky conditions. The experimental application of radiance to daylighting investigation of the ACM further supports its capabilities as well as its accuracy. Using radiance to study two daylighting control options (curtains and louvers), it can be found that louvers are more effective than curtains as daylighting control devices, and that the angle of the louvers have more effect than their reflectance on daylight penetration and distribution.

Published
2001

48. The use of performance-based simulation tools for building design and evaluation — a Singapore perspective

Author

Lam Khee Poh, Henry Feriadi, and Wong Nyuk Hien

Subjects
Engineering, Environmental Engineering, Design evaluation, business.industry, Geography, Planning and Development, Perspective (graphical), Building and Construction, Building design, Construction engineering, Systems engineering, Engineering design process, business, Environmental quality, Civil and Structural Engineering
Abstract

This paper provides an overview of some of the state-of-the art performance-based simulation tools available for the design evaluation of environmental quality in buildings. Through an extensive industry survey, it reveals the extent of usage of performance-based simulation tools for building design and evaluation in Singapore. It highlights particularly the difficulties encountered in the usage and the needs of the industry for such tools. Recommendations are also given as to how to promote the pervasive use of such simulation tools to enhance the design process.

Published
2000

49. Implementing quality in property management – The case of Singapore

Author

Lawrence Chin and Lam Khee Poh

Subjects
Quality management, ComputingMilieux_THECOMPUTINGPROFESSION, business.industry, Accounting, Certification, Property management, Quality audit, Quality management system, Business, Management and Accounting (miscellaneous), Business, Marketing, Quality policy, Quality assurance, Finance, Quality of analytical results
Abstract

This paper examines the property management industry’s attitude in Singapore towards quality. The survey findings show that more firms are becoming aware of the benefits of seeking ISO certification and seeing the need for adopting quality practices in order to have a competitive edge. A case study of an actual property management firm documents the process and procedure in implementing a quality system and in seeking ISO 9000 certification.

Published
1999

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