نتایج جستجو برای: lighting systems

تعداد نتایج: 1197838  

2007
Stephen DiVerdi Yuan-Fang Wang Robert Heinlein Matthew Turk Ismo Rakkolainen Alex Olwal

Towards Anywhere Augmentation Stephen DiVerdi For Augmented Reality (AR) technologies to experience wide-spread adoption, the barrier to entry must be reduced significantly. In particular, setup costs of new systems in new environments are prohibitive for high-fidelity augmentation. The goal of this thesis is to take first steps towards an overall reduction in these costs. The main AR challenge...

ژورنال: طلوع بهداشت یزد 2016
برخورداری‌ فیروزآبادی, ابوالفضل, فیروزی چاهک, علی, قهاری, مهدی, کارگرشورکی, فاطمه,

Introduction: The sense of sight is one of the most vital human senses and help the environment gets most of its information. Whatever one's job is more subtle, more work will be given brightness. Good lighting, increase work efficiency and general physiological effects on people's moods. The relationship between low and high frequency illumination accidents there Methods: This study was con...

2015
Pratap Singh Yadav Nitai Pal Dheeraj Kumar S. Vamsi Krishna

Lighting condition is very critical to mine workers, since they completely depend upon visual indication. Effective lighting systems provide better visibility and contribute to improved safety, production, productivity and efficiency of equipments. This paper intended to present a simulation study of configurations for the uniform illumination over a rectangular-target surface (underground mine...

2011
K Joulan

Automotive lighting systems are designed in order to provide the driver enough visibility, day and night, whatever the weather. In road lighting practice, an object of a fixed size in a simple scene is considered as visible if the contrast between its luminance and its background luminance is higher than a threshold contrast. This ratio is denoted VL (Visibility Level). We propose a framework i...

Background and Objectives: Nowadays, people spend a considerable amount of time in buildings, having artificial lighting systems throughout the day. LED lamps with low energy use and high efficiency are one of the most used sources. Considering the effect of lighting sources color temperature on human performance, the current study evaluated the effect of LED lamps in two color temperature mods...

2016
Fei Tan

In commercial buildings, smart lighting control systems are applied to minimize the electrical energy consumption. These systems use occupancy and light sensor data to adapt artificial light in accordance with changing occupancy and daylight conditions. In these systems, the performance relies on a pre-calibration phase to achieve daylight adaptation of artificial light. Since the pre-calibrate...

Journal: :jundishapur journal of health sciences 0
majid hajibabaei department of occupational hygiene, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of occupational hygiene, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-6113738269, fax: +98-6113738282 samira kord department of occupational hygiene, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; student research committee, ahvaz jundishapur university of medical sciences, ahvaz, ir iran ezat rasooli department of occupational hygiene, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; student research committee, ahvaz jundishapur university of medical sciences, ahvaz, ir iran

results the results show the artificial lighting obtained by difference methods of the overall lighting from natural lighting in closed blinds mode equal to 266 lux and night lighting 283.5 lux that they have no significant differences with each other (p = 0.269). as well as the illumination intensity obtained from a standard grid method is 283.5 lux and illumination intensity based on luminair...

2008
Yao-Jung Wen James Bonnell Alice M. Agogino

Overhead light fixtures in shared-space offices are typically grouped into banks, each of which is controlled by a single switch. Even in offices with daylight responsive systems, the luminaires are divided into zones controlled by one photosensor per zone. Too often, the geographically-defined “zone” does not correspond to occupied areas, and energy is wasted illuminating the unoccupied areas....

Journal: :Optics express 2005
Shaomin Wang Laigui Hu Binzhi Zhang Daomu Zhao Zhiyi Wei Zhiguo Zhang

Nano-carbon as lighting source is demonstrated in this paper. The characterized nano-radiation from nano-carbon, excited by different lasers in vacuum, is observed when laser intensity is over a threshold. With lower excitation threshold and smaller white light source, nano-carbon is more applicable to be as lighting system than the others in scientific experiments. White light emission of nano...

2010
DANIEL-IOAN CURIAC

This paper proposes an efficient implementation of scalable and flexible street lighting control in urban environments. The purpose is to decrease the overall energy consumption without affecting safety. In a hierarchical three-level control strategy based on qualitative processing, the lower level is represented by wireless sensor-actuator network clusters that control individual street lamps,...

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