JAOMAD Glossary J:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Intro
J—Symbol of ANSI thermocouple type for Iron vs. Constantan; also: means "Power" (Joule) when used in first alpha character position of ISA instrument function tag, means "Scan" when used as modifier [see ANSI/ISA S5.1-1984 (R1992)].
J++—Java programming language (MS VJ++).
Jabber—In data communications, error condition that occurs when network device transmits packets larger than maximum allowable size, or will no relinquish token, etc. (depending upon media access method being used).
Jabberlock—In data communications, device or technique in specific device to prevent it from "jabbering," see Jabber.
Java™—Object oriented software programming language and programming environment which is platform-neutral (UNIX, OS/2, NT, MACINTOSH, etc.); originally developed by Sun Microsystems Inc. as a platform for programming on small embedded devices such as cell phones, PDAs and sensors; claimed to be more simple than C++, it has significant implications for use on Internet applications and is most common computer programming languages there.
Java Beans—Reusable chunks of Java software code that can be assembled as components in larger applications.
JCAF—Java Control & Automation Framework.
JEDEC—(Joint Electronic Device Engineering Council).
JEIDA—(Japanese Electronics Industry Development Association); equivalent to PCMCIA.
JEIF—(Japan Electrical Industrial Federation).
JEMA—(Japan Electrical Manufacturers’ Association).
JEMIMA—(Japan Electric Measuring Instrument Manufacturer's Association).
JESSI—(Joint European Submicron Silicon Initiative).
Jetness—Darkness of a pigment, typically caused by size of carbon black agglomerates (smaller causes darker films).
JFET, JUGFET—Junction Field Effect Transistor.
JI—Junction Isolation.
Jiffy—Real unit of time: 1/100th second. K
Jini™—[pronounced: gee-nee] Technology developed by Sun Microsystems Inc. based on protocols and set of Java™ technology interfaces which enables devices and applications to enter into impromptu community of virtual machines on a network; by using process called “discovery” to seek out other devices also using Jini technology, devices then post objects-- representing services they provide as well as their defining characteristics and attributes-- to a Jini technology lookup service; when some device wants to use a service offered to the community, it can download required objects, including any code such as applications, device drivers, or user interfaces, from the Jini technology lookup service.
JISC— (Japan Industry Standards Committee)
JIT—Just In Time manufacturing; delivery approach that stresses benefits of the "pull" system, where material is brought to worksite only when needed; requires close synchronization with all related activities; also: in software, Java Information Technology.
Jitter—In transmission, slight movement of signal in time or phase that can introduce errors and loss of synchronization in high speed synchronous communication.
Joint Time-Frequency Analysis—Technique for spectral analysis of rapidly changing waveforms.
Joule—Basic unit of thermal energy.
JPEG—(Joint Photographic Experts Group); working committee under auspices of ISO that is attempting to define a proposed universal standard for digital compression and decompression of still images for use in computer systems, and for exchange between computers; JPEG algorithm reduces image size by as much as 65:1 while maintaining image integrity by eliminating imperceptible color information.
JSA—(Japanese Standards Association); member of IEC.
JTAG—(Joint Test Action Group).
JTFA—Joint Time-Frequency Analysis; see definition.
JTM—Job Transfer and Manipulation; emerging ISO standard.
Jumper—A patch cable or wire used to establish a circuit, often temporarily, for testing or diagnostics.
Junction—Point in thermocouple where two dissimilar metals are joined; point where any two or more wires are joined.
Justify—In typographical composition of screen displays and printing, to space characters uniformly so that all line lengths are the same, flush to both right and left margins.
JVM—Java Virtual Machine; Java interpreter software that converts Java intermediate language (bytecode) into machine language and executes it; original came from JavaSoft division of Sun, but other vendors developed their own; it is incorporated into a Web browser in order to execute Java applets, and is also installed in a Web server to execute server-side Java programs; can also be installed in a client machine to run stand-alone Java applications.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Intro