The facade of the office levels has mechanically ventilated windows. The warm air in the room is extracted above the lighting units, so that the air also takes up their additional heat. Then this air is fed via specially shaped ducts at the level of the topmost transoms into the narrow cavity of the story-height ventilated windows. Here the air is warmed further by taking up heat from radiation...

This paper presents a methodology for optimizing skylight design with the considerations of thermal comfort, daylight availability and energy performance by integrated daylight and thermal simulation. Dynamic thermal modelling programmed IES and daylight simulation engine Radiance are used as simulation tools to study energy performance of a shopping mall atrium with a skylight on the roof ...

Thermal management is important for the efficient operation of organic light-emitting diodes (OLED, or PHOLED) at high brightness, with the device operating temperature influencing both lifetime and performance. We apply a transmission-matrix approach to analytically model the effects of thermal conduction, convection and radiation on OLED temperature. The model predictions match experiment wit...

Highly luminescent Si quantum dot embedded SiOx films were studied as down-converting emitters for solid-state lighting applications. Strong red photoluminescence was observed from these Si nanocrystal embedded films prepared by thermal evaporation of SiO in vacuum or an O2 atmosphere followed by anneal at 1100 ◦C. The stoichiometry (1.0 < x < 1.9) and refractive indices (1.5–1.75) of these fil...

While traditional image and video processing focus on extracting knowledge from data of a single modality, such as visual spectrum or thermal infrared video, this report investigates the benefits and challenges of capturing and analysing multimodal video. It specifically targets the two modalities of visible spectrum and thermal infrared video. A novel capture device has been developed to captu...

This paper presents an assessment by integration of LED T8 tube lamps in academic buildings for energy efficiency considerations. The proposed project was implemented conjunction with a national mission, action plan (NEEAP) 10-year implementation period 2016-2025 reducing allocation on subsidies efficient expenditure towards energy-saving measures. A case study real environment at one the UiTM’...

In this communication, an attempt has been made for evaluating the performance of an existing BIPV system for Indian climatic conditions, considering four weather conditions (a, b, c and d type) for five different cities (New Delhi, Bangalore, Mumbai, Srinagar, and Jodhpur) of India. In this paper, first solar radiation is calculated on inclined roof (30), south, east and west facades (90) of t...

Monochromatic coherent light traversing a disordered photonic medium evolves into a random field whose statistics are dictated by the disorder level. Here we demonstrate experimentally that light statistics can be deterministically tuned in certain disordered lattices, even when the disorder level is held fixed, by controllably breaking the excitation symmetry of the lattice modes. We exploit a...

UNLABELLED Environmental conditions such as lighting and thermal comfort are influencing factors on sleep quality and visual tiredness. The purpose of this study was the determination of the relationship between thermal comfort and light intensity with the sleep quality and eye fatigue in shift nurses. METHOD This cross-sectional research was conducted on 82 shift-work personnel of 18 nursing...