Having a Glossary meant I could reduce the text on most pages, while expanding background for the definitions, and relating the ideas to other similar, contradictory, or more basic ideas. Why Bother with Definitions?
The standard unit of measurement for electric current that is equal to one coulomb per second. It defines the quantity of electrons moving past a given point in a circuit during a specific period.
Amp is an abbreviation. Abbreviation for American National Standards Institute. A tube enclosed by the outer glass envelope of a HID lamp and made of clear quartz or ceramic that contains the arc stream. A single opaque or translucent element used to control light distribution at certain angles.
A device used to operate fluorescent and HID lamps. The ballast provides the necessary starting voltage, while limiting and regulating the lamp current during operation. Undesirable condition under which the ballast turns lamps on and off cycles due to the overheating of the thermal switch inside the ballast.
This may be due to incorrect lamps, improper voltage being supplied, high ambient temperature around the fixture, or the early stage of ballast failure. The ballast efficiency factor BEF is the ballast factor see below divided by the input power of the ballast.
The higher the BEF within the same lamp-ballast type the more efficient the ballast. The ballast factor BF for a specific lamp-ballast combination represents the percentage of the rated lamp lumens that will be produced by the combination.
Unit of luminous intensity, describing the intensity of a light source in a specific direction. A curve, often on polar coordinates, illustrating the variation of luminous intensity of a lamp or luminaire in a plane through the light center. A measure of luminous intensity of a light source in a specific direction, measured in candelas see above.
Abbreviation for Certified Ballast Manufacturers Association. Abbreviation for California Energy Commission. The ratio of lumens from a luminaire received on the work plane to the lumens produced by the lamps alone. A scale of the effect of a light source on the color appearance of an object compared to its color appearance under a reference light source.
Expressed on a scale of 1 towhere indicates no color shift. A low CRI rating suggests that the colors of objects will appear unnatural under that particular light source. The color temperature is a specification of the color appearance of a light source, relating the color to a reference source heated to a particular temperature, measured by the thermal unit Kelvin.
The measurement can also be described as the "warmth" or "coolness" of a light source. Generally, sources below K are considered "warm;" while those above K are considered "cool" sources. A small fluorescent lamp that is often used as an alternative to incandescent lighting.
The lamp life is about 10 times longer than incandescent lamps and is times more efficacious. A premium type of HID ballast in which the primary and secondary coils are isolated.
It is considered a high performance, high loss ballast featuring excellent output regulation. A popular type of HID ballast in which the primary and secondary coils are electrically connected.
Considered an appropriate balance between cost and performance. The relationship between the luminance of an object and its background.
The angle from a fixture's vertical axis at which a reflector, louver, or other shielding device cuts off direct visibility of a lamp. It is the complementary angle of the shielding angle.
A dimming system controlled by a photocell that reduces the output of the lamps when daylight is present. As daylight levels increase, lamp intensity decreases.Hyperlinked definitions and discussions of many terms in cryptography, mathematics, statistics, electronics, patents, logic, and argumentation used in cipher construction, analysis and production.
A Ciphers By Ritter page. Title Authors Published Abstract Publication Details; Easy Email Encryption with Easy Key Management John S. Koh, Steven M. Bellovin, Jason Nieh.
Chapter 6 The Periodic Table and Periodic Law The elements, which make up all living and non-living matter, fit into a orderly table. When interpreted properly, the table describes much of the elements physical and chemical properties. Table of contents (German version)0.
Abstract 1. Approaching the question concerning digital being 2. Number and being Aristotle's ontology of number and geometric figure.
Author's Preface. This book is an attempt to place the relations of Sex in a new and decisive light. It is an attempt not to collect the greatest possible number of distinguishing characters, or to arrange into a system all the results of scientific measuring and experiment, but to refer to a single principle the whole contrast between man and woman.
Sep 26, · The periodic table is separated into the s, p, d, and f block. We can use this information to write electron configurations.