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35.904  Articles
1 of 3.591 pages  |  10  records  |  more records»
Perkembangan teknologi telekomunikasi saat ini berkembang sangat pesat. Keinginan masyarakat untuk mengakses internet dengan cepat dan efisien semakin meningkat. Light Fidelity (Li-Fi) merupakan teknologi komunikasi tanpa kabel yang mempunyai kecepatan tr... see more

This study is conducted to improve growth performance, breast meat characteristics, welfare, and immunity level of broiler chickens by using a combination of monochromatic LED light in the early and later periods of the rearing. A total of 576 one-day old... see more

The thermal conditions of a filament LED retro light bulb has been investigated. In such light bulbs, LEDs are mounted on filaments which have glass or sapphire substrate and are surrounded by yttrium-aluminium-garnet (YAG). Heat management is challenging... see more

The aim of this study was to examine the effect of five different wavelengths of light on the comfrey plant (Symphytum officinale) (family Boraginaceae). The light source and wavelengths used in the study were UV-A (390-410 nm), blue (465-485 nm), red (62... see more

Basic mechanisms of software packages for formation the spatial light distribution are investigated, the algorithm for modeling the light distribution of LED luminaires using specialized software is proposed

The resin is one of the most used materials for orthodontic brackets retentions, and its polymerization occurs through luminous energy. The halogenous light is the most usedluminous source, because it presents low cost and easy maintenance. However, the n... see more

This paper proposes a single-stage, high power-factor light-emitting diode (LED) driver with a self-excited control scheme for the power switches. The self-excited mechanism is accomplished by fetching the driving voltages from a center-tapped transformer... see more

We investigated the synergetic effect between light-emitting diode (LED) lighting efficiency and building energy savings in heating and cooling using an alternative thermal operating system (ATOS) of indoor LED lighting integrated with the ventilation sys... see more

In this study, to achieve the constant current drive and brightness control without a separate pulse width modulation (PWM) converter, a single converter is designed and verified by experiment under the condition of a multiple LED light load with differe... see more

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