Technology terms starting with Q

121 terms

1. Q Denotes the longer of the two chromosome arms, e.g. human 10q is the long arm of human chromosome 10.
2. Q&R Qualification and Reliability.
3. Q/FY (number) Quarter/Fiscal Year (number), e.g., 4Q/FY98
4. QA Quality Assurance.
5. QAE Quality Assurance Evaluator.
6. QAM Abbreviation for quadrature amplitude modulation.
7. QAMSP Quality Assurance Master Surveillance Plan.
8. QAS (Quick Arbitration Select) An Ultra320 SCSI feature that improves the control release between SCSI devices, reducing command overhead.
9. QC Quality Control.
10. QCIF Abbreviation for quarter common intermediate format.
11. QDR Quadrennial Defense Review (US Congress/ DoD term).
12. QFR Question for Record.
13. QIP Quality Improvement Prototype.
14. QLD Quick Look Display.
15. QM (1) Queen Match. (2) Quartermaster.
16. QM/DX Queen Match/Discrimination Experiment.
17. QMB Quality Management Board.
18. QOS Quality of Service. The performance level defined for a data communications system.
19. QoS (Quality of Service) A term used in a Service Level Agreement (SLA) denoting a guaranteed level of performance (e.g., response times less than 1 second).
20. QPP Quality Program Plan.
21. QPR Quality Program Review.
22. QPSK Abbreviation for quadrature phase-shift keying.
23. QPSR Quarterly Program Status Review.
24. QQPRI Qualitative and Quantitative Personnel Requirements Information.
25. QRA (1) Quartz Resonant Accelerometer (2) Quick Reaction Alert. (3) Quick Reaction Aircraft (US).
26. QRC Quick Reaction Capability.
27. QRG Quick Reference Guide.
28. QRM Quick Response Missile.
29. QRP Quick Response Program (PATRIOT).
30. QRP Radar Quick Response Program Radar.
31. QRS (1) Quartz Resonant Sensor. (2) Quick Reaction Software.
32. QRSS Abbreviation for quasi-random signal source.
33. QRTS Abbreviation for quasi-random test signal.
34. QRW Abbreviation for quasi-random word.
35. QSR Quadrennial Strategy Review.
36. qtree A special subdirectory in a volume that acts as a virtual subvolume with special attributes, primarily quotas and permissions.
37. Qtrly Quarterly.
38. Quad One quadrillion Btu. (1,000,000,000,000,000 Btu)
39. Quad-D/ADI Quad-D/Advanced Discriminating Interceptor. 239
40. quadded cable A cable formed of multiples of quads, paired and separately insulated, and contained under a common jacket.
41. quadrangle (quad) See topographic map.
42. QUADRANT The District of Columbia is divided into four quadrants: Northwest, Northeast, Southwest and Southeast.
43. quadratic profile Synonym parabolic profile.
44. Quadrature The component of the complex signal that is 90 degrees out of phase with the inphase component.
45. quadrature amplitude modulation (QAM) Quadrature modulation in which the two carriers are amplitude modulated. 2. In analog communications, the representation (i.e.
46. quadrature modulation Modulation using two carriers out of phase by 90° and modulated by separate signals.
47. quadrature phase-shift keying (QPSK) Phase-shift keying in which four different phase angles are used. Note: In QPSK, the four angles are usually out of phase by 90°.
48. quadriphase Synonym quadrature phase-shift keying.
49. quadruple diversity In radio communication, diversity transmission and reception in which four independently fading signals are used.
50. quadruply clad fiber A single-mode optical fiber that has four claddings. Note 1: Each cladding has a refractive index lower than that of the core.
51. quadtree A spatial index which recursively decomposes a data set (e.g., image) into square cells of different sizes until each cell has a homogeneous value.
52. Qualification Test This test simulates defined environmental conditions with a predetermined safety factor, the results indicating whether a given design can perform its…
53. qualified Possessing a complete name. The symbol $Ent::moot is qualified; $moot is unqualified. A fully qualified filename is specified from the top-level directory.
54. Quality The degree to which a health or social service meets or exceeds established professional standards and user expectations.
55. Quality Assurance (QA) The process of identifying problems in service delivery, designing activities to overcome these problems, and following up to ensure that no new problems…
56. Quality Content Content which is linkworthy in nature. See also: What is Quality Content? When Unique Content is Not "Unique"
57. quality control (QC) A management function whereby control of the quality of (a) raw materials, assemblies, produced materiel, and components, (b) services related to…
58. quality factor In a reactive circuit, the ratio of the reactance in ohms divided by the resistance in ohms.
59. Quality Link Search engines count links votes of trust. Quality links count more than low quality links.
60. Quality of Service (QoS) The performance level defined for a data communications system.
61. quantifier A component of a "regular expression" specifying how many times the foregoing "atom" may occur.
62. Quantization A process in which a continuous signal is converted to a series of points at discrete levels.
63. quantization error Synonym quantizing distortion.
64. quantization level In the quantization process, the discrete value assigned to a particular subrange of the analog signal being quantized.
65. quantization noise Synonym quantizing noise.
66. quantized feedback In a digital feedback loop, the digital signal that is fed back. Note 1: Several forms of analog-to-digital converters contain a quantized feedback loop…
67. quantizing distortion Distortion that results from the quantization process. Synonym quantization error.
68. quantizing levels In digital transmission, the number of discrete signal levels transmitted as the result of signal digitization.
69. quantizing noise Noise caused by the error of approximation in quantization. Note: Quantizing noise is dependent on the particular quantization process used and the…
70. quantum See timeslice.
71. quantum efficiency In an optical source or detector, the ratio of the number of output quanta to the number of input quanta.
72. quantum noise Noise attributable to the discrete and probabilistic nature of physical phenomena and their interactions.
73. quantum-limited operation Synonym quantum-noise-limited operation.
74. quantum-noise-limited operation Operation wherein the minimum detectable signal is limited by quantum noise. Synonym quantum-limited operation.
75. quarter common intermediate format (QCIF) A video format defined in ITU-T Recommendation H.261 that is characterized by 176 luminance pixels on each of 144 lines, with half as many chrominance…
76. quarter quad One-quarter area of a four-sided quadrangle that depicts 7.5 minutes of latitude and 7.5 minutes of longitude on a side.
77. quartz clock A clock containing a quartz oscillator that determines the accuracy and precision of the clock.
78. quartz oscillator An oscillator in which a quartz crystal is used to stabilize the frequency. Note: The piezoelectric property of the quartz crystal results in a nearly…
79. quasi-analog signal A digital signal that has been converted to a form suitable for transmission over a specified analog channel.
80. quasi-analog transmission Transmission in which a special-purpose modulator is used to convert digital signals into an analog form suitable for transmission over an analog…
81. quasi-associated mode of signaling A limited case of the nonassociated mode of signaling in which the path taken by a message through the signaling network is predetermined and fixed at a…
82. quasi-lossless compression In video and multimedia applications, the bit-rate reduction of an image signal, by an algorithm that recognizes the high degree of correlation…
83. quasi-random signal (QRS) See QRS.
84. quaternary phase-shift keying Synonym quadrature phase-shift keying.
85. quaternary signal A digital signal having four significant conditions.
86. Queries per second (QPS) The number of queries that the enterprise search platform will process in one second.
87. Query A request for identification of a set of assets, expressed in terms of a set of criteria, which the identified item must satisfy.
88. query aggregator source An aggregator source (included in WS MDS) that polls a WSRF service for resource property information.
89. Query and result processing The application of algorithms to the original query or to the raw results returned by the search engine.
90. query call In adaptive high-frequency (HF) radio, an automatic-link-establishment (ALE) call that requests responses from stations having connectivity to the…
91. Query Refinement Some searchers may refine their search query if they deemed the results as being irrelevant.
92. query string A component of an HTTP request URL that contains a set of parameters and values that affect the handling of the request.
93. Query Syntax The semantic rules that must be observed when submitting queries to a search engine - for example, the use of parenthesis and Boolean operators.
94. Query term weight The ability to support different relevance weight for different terms in a query.
95. Query transformation The analysis and subsequent rewriting of a query, using linguistic transformations such as lemmatization and spell-checking.
96. query-based distribution group A distribution group that uses a Lightweight Directory Access Protocol (LDAP) query to derive its membership at the time the message is sent.
97. Query-By-Example A search where a user instructs an engine to find more documents that are similar to a particular document. Also called "find similar."
98. queue A system where if a realm is overloaded, subsequent players trying to log on will be queued up in a first come first serve basis and allowed to log on…
99. Queue Quick Reaction Launch Vehicle A store for a sequence of packets, or messages, which are waiting to be processed.
100. queue traffic A series of outgoing or incoming calls waiting for service. 2. In a store-and-forward switching center, the outgoing messages awaiting transmission at the…