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| | Xerox Star - Wikipedia, the free encyclopedia |
 | | The Star team used a sophisticated integrated development environment known internally as Tajo and externally as Xerox Development Environment or XDE. | | | Initially the Star software was developed on a hardware platform dubbed the Dolphin, however the complexity of the software eventually overwhelmed its limited configuration. | | | The eventual Star workstation hardware was known as a Dandelion, or Dlion, based on the "Wildflower" architecture paper by Butler Lampson. |
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http://en.wikipedia.org/wiki/Xerox_Star
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| | Star coupler - Wikipedia, the free encyclopedia |
| | Digital's star coupler was developed for use with the VAX and later Alpha families of computers running Digital's VMS operating system, to provide a passive, highly reliable interconnect for Digital's cluster technology. | | | The signal that was distributed was 70 MB/s computer interconnect data and the star coupler provided two redundant paths of either 8 or 16 ports each. | | | In this case, the star coupler interconnected links to computers via coaxial cable rather than optical fibres, but the function was essentially the same. |
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http://en.wikipedia.org/wiki/Star_coupler
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| | Xerox PARC - Wikipedia, the free encyclopedia |
| | Xerox PARC was the incubator of many elements of modern computing. | | | Xerox PARC was the first research group to widely adopt the mouse invented by Douglas Engelbart's Augmentation Research Center at the Stanford Research Institute (now SRI International) in Menlo Park, California. | | | The work at PARC in the years since the early 1980s is often overlooked, but major work since then includes Ubiquitous computing aka Pervasive Computing, Aspect-oriented programming, and IPv6 to name but a few. |
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http://en.wikipedia.org/wiki/Xerox_PARC
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| | Xerox Star Research |
| | Star actually refers to the software that was to be used in conjunction of the machine developed by Xerox and not the machine itself, although it's easy to see the misunderstanding. | | | The Star was designed for distributed computing, requiring such components as laser printers, networked computers, and electronic filing cabinets. | | | The software developed for the Star was designed for the user who has no computer knowledge became very demanding on the hardware. |
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http://xeroxstar.tripod.com
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| | Star schema - Wikipedia, the free encyclopedia |
| | Fact tables in star schema are mostly in third normal form (3NF), but dimensional tables are in de-normalized second normal form (2NF). | | | Another reason for using star schema is its ease of understanding. | | | The star schema makes multi-dimensional database (MDDB) functionality possible using a traditional relational database. |
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http://en.wikipedia.org/wiki/Star_schema
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| | The Xerox "Star": A Retrospective |
| | However, using the name Star to refer to the machine is understandable since the machine was designed in conjunction with the software to meet the needs of the software design. | | | Star's designers assumed that the target users are interested in getting their work done and not at all interested in computers. | | | Star's introduction was an important event in the history of personal computing because it changed notions of how interactive systems should be designed. |
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http://www.digibarn.com/friends/curbow/star/retrospect
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| | Transmissive single-mode fiber optics star network - Patent 4708424 |
| | Hierarchic and reverse-hierarchic structures as defined herein are structures in which elementary stars are aggregated into progressively larger stars, as new layers are added from the input or from the output respectively. | | | The M.sup.n -star comprises a plurality of single-mode M-star fiber optics couplers and coupling means for intercoupling the M-star couplers such that there are M.sup.n inputs and M.sup.n outputs and such that each M.sup.n output is the average of all M.sup.n inputs. | | | The stars are interconnected, as illustrated in FIG. |
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http://www.freepatentsonline.com/4708424.html
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| | Star Queries in Oracle8 |
| | This star schema is an intuitive representation of multidimensional ‘datacube’ in a relational environment. | | | Unlike a join-index approach, the Oracle8 star query algorithm is flexible so that every component of the star query algorithm can be tuned, and the cost-based optimizer intelligently and transparently applies these additional optimizations. | | | Many star queries are "outside-in," that is, the end user places constraints on the dimension tables (the outside of the star schema) and retrieves data from the fact table. |
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http://www.fortunecity.com/skyscraper/oracle/699/orahtml/oracle/o8star.html
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| | Star Arrangement @ NaturalResearch.org (Natural Research) |
| | The apparent brightness of a star is measured by its apparent magnitude. | | | There are many other mnemonics for star classification. | | | Star formation begins with gravitational instability inside those clouds, often triggered by shockwaves from supernovae or the collision of two galaxies (as in a starburst galaxy). |
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http://www.naturalresearch.org/encyclopedia/Star
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| | Fiber optic couplers |
| | Star and tree couplers distribute the input power uniformly among the output fibers. | | | Types of fiber optic couplers include optical splitters, optical combiners, X couplers, star couplers, and tree couplers. | | | A star coupler is a passive device that distributes optical power from more than two input ports among several output ports. |
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http://www.tpub.com/neets/tm/108-11.htm
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| | Bringing Design to Software Profile 2 - STAR |
| | The core concept that distinguished Star (and other Alto programs) from the conventional computer interfaces of their time was the use of a bitmapped screen to present the user with direct visual representations of objects. | | | The Xerox Star was born out of PARC's creative ferment, designing an integrated system that would bring PARC's new hardware and software ideas into a commercially viable product for use in office environments. | | | Because all Star applications were developed in a unified way by a single development group, it was possible to adhere to a coherent and consistent design language (see Chapter 4 for a discussion of design languages). |
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http://hci.stanford.edu/bds/2p-star.html
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| | SmallStar |
| | Star was also interesting because it has a graphical, direct manipulation user interface; it pioneered the desktop metaphor and the use of icons, and was the forerunner in the commercial use of the mouse as a pointing device. | | | SmallStar is a working simulation of the Xerox Star office information system, with programming by demonstration added. | | | Star was an ideal starting point for showing the utility of programming by demonstration: it is a general-purpose office system, providing text and graphics editing, filing, printing, mailing, forms processing, and database functions [Smith 82a] [Smith 82b]. |
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http://www.acypher.com/wwid/Chapters/05SmallStar.html
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| | Star catalogue - Wikipedia, the free encyclopedia |
| | An example of a star which is often referred to by one of these unofficial GJ numbers is GJ 3021 (see Extrasolar planet). | | | Auxiliary information, including UBV photometry, MK spectral types, data on the variability and binary nature of the stars, orbits when available, and miscellaneous information to aid in determining the reliability of the data are also listed. | | | The Catalogue astrographique (Astrographic Catalogue) was part of the international Carte du ciel programme designed to photograph and measure the positions of all stars brighter than magnitude 11.0. |
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http://en.wikipedia.org/wiki/Star_catalogue
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| | boats.com - Feature: Star Light, Star Bright |
| | It follows, therefore, that a magnitude 0 star is 100 times brighter than a magnitude 5 star, and a star that is 100 times brighter than a star of magnitude 4 must have a magnitude of -1. | | | The magnitude of a star is a measure of its relative brilliance: A magnitude 1 star projects 100 times as much light as a magnitude 6 star; a magnitude 2 star is 100 times brighter than a magnitude 7 star, and so on. | | | Stars with magnitudes less than 1.0 are first magnitude stars (there are only 12). |
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http://www.boats.com/content/default_detail.jsp?contentid=2934
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| | Teradata Magazine Applied Solutions: It's In the Stars |
| | The goal of the star schema is to provide a model that allows the business user to browse just a single table or, at most, a few tables in the query. | | | Star schemas aim to minimize joins, to make the most of single table browse or lookups, and to keep the model simple for business user navigation, typically for report generation or “canned ad hoc” queries. | | | The new star’s dimension tables might be copies of the existing dimension tables surrounding other fact tables, or they might consist of segments of existing dimension tables or even tables that represent the same dimension but consist of different entities (Figure 3). |
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http://www.teradata.com/t/go.aspx?id=114820
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| | Hidden Complexities in a Simple Star Schema |
| | Star schemas are simple for users to relate to and understand; but much of that simplicity is the result of proper recognition and resolution of the complexities of the source data before it gets to those users. | | | The star schema intentionally creates a simplified data arrangement that aids users in understanding the design, while at the same time providing the structural setup for a relational version of a regression equation. | | | When designing a star schema, all data items are divided into one of two groups - numeric items used in calculations and non-numeric items used for filtering and sorting query results. |
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http://www.dmreview.com/editorial/newsletter_article.cfm?nl=dmdirect&articleId=4858
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| | What's Up - Constellations (Apr) |
| | Alpha Geminorum (Castor) is, at magnitude 1.59 the 23rd brightest star in the sky, and is properly referred to as being of the second magnitude as astronomers consider a first magnitude to be from 0.5 to +1.5 - Castor barely falls short. | | | The star is yellowish, and in a period of 10.15172 days swings between magnitude 4.4 and 5.2; Delta, by comparison, is magnitude 3.51. | | | Xi Geminorum (Alzirr) is a fairly bright star, of magnitude 3.38, and is noteworthy primarily because you may notice it four degrees southwest of second magnitude Alhena. |
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http://www.sciencecenter.net/whatsup/04/gm-stars.htm
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| | AllRefer.com - Castor, in astronomy, Star (Astronomy: Stars) - Encyclopedia |
| | Castor is actually a six-star system, being a visual triple each component of which is a binary star; the three components are an eclipsing binary and a pair of spectroscopic binaries. | | | The two brightest components are white, main-sequence stars of spectral classes A1 and A5. | | | Slightly dimmer than Pollux, with which it forms the Twins, Castor has an apparent magnitude of 1.58, which still makes it one of the 25 brightest stars in the sky. |
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http://reference.allrefer.com/encyclopedia/C/Castor.html
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| | Computer networking - Wikipedia, the free encyclopedia |
| | A computer network is a system for communication between computers. | | | Networks, and the technologies needed to connect and communicate through and between them, continue to drive computer hardware, software, and peripherals industries. | | | In 1968 Paul Baran proposed a network system consisting of datagrams or packets that could be used in a packet switching network between computer systems. |
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http://www.sciencedaily.com/encyclopedia/computer_network
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| | boats.com - Feature: Star Light, Star Bright |
| | It follows, therefore, that a magnitude 0 star is 100 times brighter than a magnitude 5 star, and a star that is 100 times brighter than a star of magnitude 4 must have a magnitude of -1. | | | The magnitude of a star is a measure of its relative brilliance: A magnitude 1 star projects 100 times as much light as a magnitude 6 star; a magnitude 2 star is 100 times brighter than a magnitude 7 star, and so on. | | | Stars with magnitudes less than 1.0 are first magnitude stars (there are only 12). |
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http://www.boats.com/content/default_detail.jsp?contentid=2934
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| | Section 16: GUI and Personal Computers |
| | The Xerox Star was the first commercial personal computer to use the now common desktop metaphor. | | | While mainline computer engineers scoffed at the idea of one computer for each person, the Xerox team built the Alto personal computer. | | | Xerox PARC even had the world's first computer virus called a 'tapeworm' because it would eat it's way through the Ethernet and consume all available resources. |
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http://accad.osu.edu/~waynec/history/lesson16.html
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| | Couplers & Splitters |
| | Large insertion loss, (20 dB typically for a 64-port device) creates the biggest disadvantage of the star coupler, as is the need for a complex collision-prevention protocol. | | | Star couplers have many ports (usually a power of two), and couplers with 32 or 64 ports are not uncommon. | | | Many transceivers connect to the star coupler and can communicate with all other transceivers, assuming the network adopts a protocol which prevent two or more transceivers from communicating simultaneously. |
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http://www.fiber-optics.info/articles/couple-split.htm
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| | Astronomy People : Starshine.com |
| | He established the uniform system for computing star positions that is still in use. | | | From 1821 to 1833 he accurately determined the positions of stars to the ninth magnitude, bringing the number of stars so cataloged to 50,000. | | | From pioneering research on binary stars and stellar parallaxes, Russell developed a theory (1913) of stellar evolution that served to displace older concepts. |
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http://www.starshine.com/frankn/astronomy/people.asp
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| | Comparison |
| | Castor is a spectroscopic binary system, which means that the second star is not visible and we only know that it is there due to the wobble in the other star. | | | Castor A and B are both shades of blue, within their binary systems, and Castor C has both red dwarfs. | | | In order to understand how unique Castor is, but also in some ways how similar it is to other stars or star systems it must be compared to other stars or star systems. |
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http://www.eso.org/outreach/eduoff/edu-prog/catchastar/CAS2002/cas-projects/uk_castor_1/comp.html
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| | Dimensionless Star Schema (Bitmap Star) |
| | So when a star is searched the outer dimension tables are first scanned then the bitmaps are merged based on the results from the scan of the dimension tables and the fact table is then sliced and diced based on the bitmap merges. | | | However, this structure is not suitable for all star schemas but can be applied in a limited fashion to many where the duplicitous storage of values in both the fact and dimension tables occurs. | | | By eliminating the fact tables we reduce our maintenance and storage requirements and may actually improve the performance of our queries that now simply do a bitmap merge operation to resolve the query, eliminating many un-needed table and index operations from the now defunct dimensions. |
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http://www.dba-oracle.com/T-dimensionless_star_bitmap_schema.htm
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| | The Xerox Star |
| | A huge mistake that Xerox made was that the Xerox Star was a completely closed system. | | | The Star was all about printing, something that is still important but not given as much consideration today. | | | Xerox would not license the the MESA programming language or development environment to anyone outside of Xerox. |
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http://toastytech.com/guis/star2.html
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| | A Brief History of Lisp Machines |
| | Lisp, as the default AI language, was also an important research vehicle for new computer languages, networking, display technology and so on. | | | Everyone "knows" that lisp was the language of choice for Artificial Intelligence research, but a big part of AI research is about paradigms for representing knowledge, expressing algorithms, man-machine communication, and machine-to-machine communication: In short, how to use computers in general. | | | It became technically feasible to build cheaper hardware that would run lisp better than on timeshared computers. |
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http://www.andromeda.com/people/ddyer/lisp
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| | The First Binary Star |
| | Castor, also known as Alpha Geminorum, may be considered it's first star since alpha is the first letter of the greek alphabet. | | | Castor was the first true physical binary to be recognized, and the first object beyond our own Solar System in which the force of gravitation was shown to be operating, as it does in the planetary system." | | | So Castor may be considered the first binary star due to it's historical significance, it's pleasing visual appearance in small telescopes, and it's unusual Bayer's designation. |
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http://ephemeris.sjaa.net/0205/e.html
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| | Introduction |
| | Castor C is the faintest of the three binary systems in the wavelengths of the visible spectrum, and is also the odd one out. | | | Castor is a multiple star system of extraordinary complexity, containing no less that 6 stars, which makes it a rare and fascinating object. | | | The 6 members are divided between 3 binary systems, Castor A, Castor B, and Castor C. Each of these binary systems will be described in turn. |
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http://www.eso.org/outreach/eduoff/edu-prog/catchastar/CAS2002/cas-projects/uk_castor_1/intro.html
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