Abstract Detecting humidity have been remained a continuing concern within some important areas such as structural health, food processing, industrial well agricultural products. In this study, novel optical sensor is introduced based on the thermionic emission of tungsten filament using fluorescent lamp set-up. Estimated blue compliant charged coupling device camera in image was confirmed an a...

Main aim of this paper is to present the information regarding the present lighting system and to explain how solid-state lighting (SSL) can stimulate the development of the science and technology and how electricity can be saved with this energy saving, energy efficient green technology. Various methods to generate white light, advantages and key challenges are outlined in this paper. Thus if ...

Ron D. Katznelson and John Howells ABSTRACT We provide an anatomy of the influence of Edison’s incandescent lamp patent U.S. 223,898 on downstream development and show how subsequent inventor activity adjusts to the improved certainty provided by court decisions as to the boundaries of a patent’s claims. First, we show that court decisions upholding Edison’s patent generated a surge of patent f...

In certain circumstances, superimposed interharmonics in the supply voltage can lead to oscillating luminous flux and cause light flicker. This phenomenon can be observed with filament lamps as well as with fluorescent lamps. Different items are dealt with in this paper: § Presentation of some experimental results: determination of the sensitivity curves for different types of lighting devices,...