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Topic Review
News Server Operation
Among the operators and users of commercial Usenet news servers, common concerns are the continually increasing storage and network capacity requirements and their effects. Completion (the ability of a server to successfully receive all traffic), retention (the amount of time articles are made available to readers) and overall system performance are the topics of frequent discussion. With the increasing demands, it is common for the transit and reader server roles to be subdivided further into numbering, storage and front end systems. These server farms are continually monitored by both insiders and outsiders, and measurements of these characteristics are often used by consumers when choosing a commercial news service.
  • 658
  • 12 Oct 2022
Topic Review
Spacetime Symmetries
Spacetime symmetries are features of spacetime that can be described as exhibiting some form of symmetry. The role of symmetry in physics is important in simplifying solutions to many problems. Spacetime symmetries are used in the study of exact solutions of Einstein's field equations of general relativity. Spacetime symmetries are distinguished from internal symmetries.
  • 658
  • 28 Nov 2022
Topic Review
Domain Name Registrar
A domain name registrar is a company that manages the reservation of Internet domain names. A domain name registrar must be accredited by a generic top-level domain (gTLD) registry or a country code top-level domain (ccTLD) registry. A registrar operates in accordance with the guidelines of the designated domain name registries.
  • 657
  • 17 Oct 2022
Topic Review
Prompt (Command)
This article presents a list of commands used by DOS operating systems, especially as used on x86-based IBM PC compatibles (PCs). Other DOS operating systems are not part of the scope of this list. In DOS, many standard system commands were provided for common tasks such as listing files on a disk or moving files. Some commands were built into the command interpreter, others existed as external commands on disk. Over the several generations of DOS, commands were added for the additional functions of the operating system. In the current Microsoft Windows operating system, a text-mode command prompt window, cmd.exe, can still be used.
  • 656
  • 24 Oct 2022
Topic Review
Microsoft DoubleSpace BPB
DriveSpace (initially known as DoubleSpace) is a disk compression utility supplied with MS-DOS starting from version 6.0 in 1993 and ending in 2000 with the release of Windows Me. The purpose of DriveSpace is to increase the amount of data the user could store on disks by transparently compressing and decompressing data on-the-fly. It is primarily intended for use with hard drives, but use for floppy disks is also supported. This feature was removed in Windows XP and later.
  • 653
  • 24 Oct 2022
Topic Review
Wordfilter
A wordfilter (sometimes referred to as just "filter" or "censor") is a script typically used on Internet forums or chat rooms that automatically scans users' posts or comments as they are submitted and automatically changes or censors particular words or phrases. The most basic wordfilters search only for specific strings of letters, and remove or overwrite them regardless of their context. More advanced wordfilters make some exceptions for context (such as filtering "butt" but not "butter"), and the most advanced wordfilters may use regular expressions.
  • 649
  • 28 Sep 2022
Topic Review
Marketing and Artificial Intelligence
The fields of marketing and artificial intelligence converge in systems which assist in areas such as market forecasting, and automation of processes and decision making, along with increased efficiency of tasks which would usually be performed by humans. The science behind these systems can be explained through neural networks and expert systems, computer programs that process input and provide valuable output for marketers. Artificial intelligence systems stemming from social computing technology can be applied to understand social networks on the Web. Data mining techniques can be used to analyze different types of social networks. This analysis helps a marketer to identify influential actors or nodes within networks, information which can then be applied to take a societal marketing approach.
  • 644
  • 21 Nov 2022
Topic Review
Augmented and Virtual Reality Exergames for Elderly People
Augmented and virtual reality (AR/VR) can be used in the context of the exergames to train motor and cognitive skills in the elderly population for health improvement.
  • 643
  • 04 Feb 2024
Topic Review
Seismic Data Query Algorithm
Edge computing can reduce the transmission pressure of wireless networks in earthquakes by pushing computing functionalities to network edges and avoiding the data transmission to cloud servers. This also leads to the scattered storage of data content in each edge server, increasing the difficulty of content search.
  • 638
  • 29 Jun 2023
Topic Review
Patch Verb
In computing, the PATCH method is a request method supported by the Hypertext Transfer Protocol (HTTP) protocol for making partial changes to an existing resource. The PATCH method provides an entity containing a list of changes to be applied to the resource requested using the HTTP Uniform Resource Identifier (URI). The list of changes are supplied in the form of a PATCH document. If the requested resource does not exist then the server may create the resource depending on the PATCH document media type and permissions. The changes described in the PATCH document must be semantically well defined but can have a different media type than the resource being patched. Frameworks such as XML, JSON can be used in describing the changes in the PATCH document.
  • 636
  • 14 Nov 2022
Topic Review
Microsoft Realtime Compression Interface
DriveSpace (initially known as DoubleSpace) is a disk compression utility supplied with MS-DOS starting from version 6.0 in 1993 and ending in 2000 with the release of Windows Me. The purpose of DriveSpace is to increase the amount of data the user could store on disks by transparently compressing and decompressing data on-the-fly. It is primarily intended for use with hard drives, but use for floppy disks is also supported. This feature was removed in Windows XP and later.
  • 634
  • 22 Nov 2022
Topic Review
Functional Database Model
The functional database model is used to support analytics applications such as financial planning and performance management. The functional database model, or the functional model for short, is different from but complementary to the relational model. The functional model is also distinct from other similarly named concepts, including the DAPLEX functional database model and functional language databases. The functional model is part of the online analytical processing (OLAP) category since it comprises multidimensional hierarchical consolidation. But it goes beyond OLAP by requiring a spreadsheet-like cell orientation, where cells can be input or calculated as functions of other cells. Also as in spreadsheets, it supports interactive calculations where the values of all dependent cells are automatically up to date whenever the value of a cell is changed.
  • 629
  • 17 Oct 2022
Topic Review
Characterizations of the Category of Topological Spaces
In mathematics, a topological space is usually defined in terms of open sets. However, there are many equivalent characterizations of the category of topological spaces. Each of these definitions provides a new way of thinking about topological concepts, and many of these have led to further lines of inquiry and generalisation.
  • 627
  • 19 Oct 2022
Topic Review
Microsoft DoubleSpace FAT
DriveSpace (initially known as DoubleSpace) is a disk compression utility supplied with MS-DOS starting from version 6.0 in 1993 and ending in 2000 with the release of Windows Me. The purpose of DriveSpace is to increase the amount of data the user could store on disks by transparently compressing and decompressing data on-the-fly. It is primarily intended for use with hard drives, but use for floppy disks is also supported. This feature was removed in Windows XP and later.
  • 623
  • 16 Nov 2022
Topic Review
Monoculture (Computer Science)
In computer science, a monoculture is a community of computers that all run identical software. All the computer systems in the community thus have the same vulnerabilities, and, like agricultural monocultures, are subject to catastrophic failure in the event of a successful attack.
  • 622
  • 25 Nov 2022
Topic Review
BASIC09
BASIC09 is a structured BASIC programming language dialect developed by Microware on behalf of Motorola for the then-new Motorola 6809 CPU and released in February 1980. It is primarily used with the OS-9 operating system, released in 1979. Microware also released a version for OS-9/68k on the 68000 as Microware BASIC. In contrast to typical BASICs of the era, BASIC09 includes a multi-pass compiler that produces compact bytecode known as I-code. I-code replaces a number of data structures found in other BASICs with direct pointers to code and values, speeding performance. Users can further compile code using the PACK command, at which point it can be called directly by OS-9 and operated as native code. In the case of PACKed code, a cut-down version of the BASIC09 runtime system is used, Runb, further improving memory footprint and load time. The language includes a number of structured programming additions, including local variables, the ability to ignore line numbers in favor of named routines, user-defined structures, and several distinct base data types including 16-bit and 8-bit (byte) integers, in addition to floating point and strings.
  • 616
  • 17 Oct 2022
Topic Review
Congruence (General Relativity)
In general relativity, a congruence (more properly, a congruence of curves) is the set of integral curves of a (nowhere vanishing) vector field in a four-dimensional Lorentzian manifold which is interpreted physically as a model of spacetime. Often this manifold will be taken to be an exact or approximate solution to the Einstein field equation.
  • 614
  • 04 Nov 2022
Topic Review
Maintenance Philosophy
Maintenance Philosophy is the mix of strategies that ensure an item works as expected when needed.
  • 613
  • 04 Nov 2022
Topic Review
AutoPatcher
AutoPatcher is an offline updater and alternative to Microsoft Update that can be used for installing software patches, service packs and other updates for certain Microsoft Windows systems. It allows these to be downloaded on a different machine or in advance, and then installed without an internet connection. By doing this, system updates can be automated and scripted, time and bandwidth required to download relevant updates is reduced, and exposure of unsecured systems online can be avoided. AutoPatcher also allows installation of some common additional software, registry settings, and patches for other Microsoft software, notably Microsoft Office. AutoPatcher currently exists for Windows 2000, XP, Vista, 7, 8, 10 and some server equivalents (Windows 2003 and 2008). For some years it did not provide support for Windows 7 or older systems, nor for some 64 bit operating systems; updates are now possible for some of these in the 2014 version of Autopatcher. Originally software patches were distributed with AutoPatcher but, following legal complaints the software was modified in 2007. It now downloads all patches to a local hard drive from Microsoft's servers (ensuring the files are original and unmodified) and then allows their offline use as before.
  • 612
  • 12 Oct 2022
Topic Review
Central Council of Church Bell Ringers
The Central Council of Church Bell Ringers (CCCBR) is an organisation founded in 1891 which represents ringers of church bells in the English style. It acts as a co-ordinating body for education, publicity and codifying change ringing rules, also for advice on maintaining and restoring full-circle bells. Within England, where the vast majority of English-style rings are located, most towers are affiliated through local ringing associations. The Central Council also publishes the bell ringers' weekly journal The Ringing World.
  • 609
  • 08 Oct 2022
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