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High-Tech Dictionary >>
Word Definition
Loader Program
Loader program is an operating system utility that performs the functions of a linker program and then immediately schedules the resulting executable program for action in the form of a memory image, without necessarily saving the program as an executable file. Loader programs are useful for prototyping, testing, and one-off applications.
Locator Program
Locator program is a type of a software development tool that assigns physical addresses to a relocatable program. This is the last step in preparing software for execution by an embedded system. The resulting file is called an executable. In some cases, the locator's functionality is built into the linker or loader, which performs the location step.
Logic Programming
Logic programming (sometimes called logical programming) is programming that makes use of pattern-directed invocation of procedures from assertions and goals. The first logic programming language was Planner which featured pattern-directed invocation of procedural plans from both assertions and goals. In order to cope with the very limited memory systems that were available when it was developed, Planner used backtracking control structure so that only one possible computation path had to be stored at a time. Subsequently, Prolog was developed as a simplification of Planner that had pattern-directed invocation only from goals (also based on backtracking). From Planner there developed the programming languages QA-4, Popler, Conniver, and QLISP. The programming languages Mercury, Visual Prolog, Oz and Fril developed from Prolog. There are also concurrent logic programming languages (not based on backtracking) derived from Planner (e.g., Ether) and derived from Prolog.
Loop Fission
Loop fission is a compiler optimization technique attempting to break a loop into multiple loops over the same index range but each taking only a part of the loop's body. The goal is to break down large loop body into smaller ones to achieve better data locality. It is the reverse action to loop fusion.
Loop Fusion
Loop fusion is a technique for compiler optimization and loop transformation, which replaces multiple loops with a single one. It is the reverse action to loop fission.
Loop Interchange
Loop interchange, a compiler optimization technique, is the process of exchanging the order of two iteration variables. One major purpose of loop interchange is to improve the cache performance for accessing array elements. Cache misses occur if the contiguously accessed array elements within the loop come from a different cache line. Loop interchange can help prevent this. The effectiveness of loop interchange depends on and must be considered in light of the cache model used by the underlying hardware and the array model used by the compiler.
Loop Inversion
Loop inversion is a technique in compiler optimization, particularly in loop transformation. This technique changes a standard while loop into a do/while (a.k.a. repeat/until) loop wrapped in an if conditional, reducing the number of jumps by two, for cases when the loop is executed. Doing so duplicates the condition check (increasing the size of the code) but is more efficient because jumps usually cause a pipeline stall. Additionally, if the initial condition is known at compile-time and is known to be side-effect-free, the "if" guard can be skipped.
Loop Optimization
Loop optimization refers to the process in computer compiling to optimize loops in the programs. Most execution time of a scientific program is spent on loops. Thus a lot of compiler analysis and optimization techniques have been developed to make the execution of loops faster.
Loop Splitting
Loop splitting, also known as loop peeling, is a compiler optimization technique. It attempts to simplify a loop or eliminate dependencies by breaking it into multiple loops which have the same bodies but iterate over different contiguous portions of the index range.
Loop Tiling
Loop tiling, also known as loop blocking, is a loop optimization used by compilers to make the execution of certain types of loops more efficient. Loop tiling partitions a loop’s iteration space into smaller chunks or blocks, so as to help ensure that data used in a loop stays in the cache until it is reused. The partitioning of loop iteration space leads to partitioning of large array into smaller blocks, thus fitting accessed array elements into cache size, enhancing cache reuse and eliminating cache size requirements.
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Word : autoflow
Explanation : A function of some programs that allows text to wrap around graphic images and spread from one page to the next, to fill the space as needed.
 
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Tech Word for Today
 Word : DID (Direct Inward Dial)
 Explanation : A customized phone line allowing internal users to directly call within the organization without see
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striped disk array storage (RAID 0) for HD; SCSI disk subsystem preferred Microsoft DirectX compatible sound card (multichannel ASIO-compatible sound card recommended),1,280x1,024 monitor resolution with 32-bit color adapter Blu-ray burner required for Blu-ray Disc creation OHCI compatible IEEE 1394 port for DV and HDV capture, export to tape, and transmit to DV device QuickTime 7.1.2 software required to use QuickTime features Broadband Internet connection required for Adobe Stock Photos* and other services