omniomni/omni-engineering huggingface dataset:
ServerNet. ServerNet is a switched fabric communications link primarily used in proprietary computers made by Tandem Computers, Compaq, and HP. 

Its features include good scalability, clean fault containment, error detection and failover. The ServerNet architecture specification defines a connection between nodes, either processor or high performance I/O nodes such as storage devices.

History
Tandem Computers developed the original ServerNet architecture and protocols for use in its own proprietary computer systems starting in 1992, and released the first ServerNet systems in 1995.  Early attempts to license the technology and interface chips to other companies failed, due in part to a disconnect between the culture of selling complete hardware / software / middleware computer systems and that needed for selling and supporting chips and licensing technology.  A follow-on development effort ported the Virtual Interface Architecture to ServerNet with PCI interface boards connecting personal computers.  Infiniband directly inherited many ServerNet features.  As of 2017, systems still ship based on the ServerNet architecture.

References 
 W. E. Baker, R. Horst, D. Sonnier, W. Watson, "A Flexible ServerNet-based Fault-Tolerant Architecture," in Proc. 25th Int. Symp. Fault-Tolerant Computing, Pasadena, CA, June 27–30 1995.
 R. Horst, "ServerNet Deadlock Avoidance and Fractahedral Topologies," in Proc. 10th Int'l Parallel Processing Symposium, Honolulu, Hawaii, pp. 274–280, 1995.
 D. Garcia, et al., "Servernet II", Parallel Computer Routing and Communication International Workshop, Jun. 26, 1997, pp. 119–135, XP002103164, Atlanta, GA.
 R. Horst and D. Garcia, "ServerNet SAN I/O Architecture," Proc. Hot Interconnects V, August 1997.
 D.R Avresky, V. Shurbanov, R. Horst, “The effect of router arbitration policy on scalability of ServerNet Topologies,” Microprocessors and Microsystems 21, pp. 545–561, 1998.
 D.R Avresky, V. Shurbanov, R. Horst, W. Watson, L. Young, D. Jewett. “Performance Modeling of ServerNet SAN Topologies,” The Journal of Supercomputing, V. 14, pp. 19–37, 1999.
 D.R Avresky, V. Shurbanov, R. Wilkinson, R. Horst, W. Watson, L. Young, “ Maximum delivery time and hot spots in ServerNet topologies, Computer Networks 31, pp. 1891–1910, 1999.
 A. Hossain, S. Kang, R. Horst, “ ServerNet and ATM Interconnects: Comparison for Compressed Video Transmission,” Journal of Communications and Networks, V. 1, No. 2, June 1999.

Computer networks
Supercomputing
Chih-Wei Huang. Chih-Wei Huang (黃志偉) is a Taiwanese software developer and promoter of free software who lives in Taiwan.  He is famous for his work in the VoIP and internationalization and localization fields in Greater China. The user name he usually uses is cwhuang.

Early career
Huang graduated from National Taiwan University (NTU) in 1993, with a bachelor's degree in physics, and earned a master's degree in electrical engineering from the university in 2000.
He worked as a director in Top Technology Inc., the CTO of Citron Network Inc., and a project manager of Tecom Inc. Huang currently works as a senior researcher of Core Technology Center in ASUSTeK Computer Inc. He is one of the start members of Software Liberty Association of Taiwan (SLAT), and the first and second members of the SLAT Council.

Free software development
Chih-Wei Huang is the founder and coordinator of the Chinese Linux Documentation Project (CLDP). He wrote the Linux Chinese HOWTO, and translated the HOWTO Index, Linux Meta-FAQ, Serial HOWTO, DNS HOWTO, Linux Information Sheet, Java-CGI HOWTO, IP Masquerade mini-HOWTO and so on. He developed the SGMLtools Chinese Kits to solve the Chinese processing issues of SGML.

He is also the second coordinator to the Chinese Linux Extensions (CLE). He has been a developer of CLE since v0.7 and became the coordinator of CLE v0.9. He pushed Chinese localization in KDE, GNOME and Abiword. He worked alongside Yuan-Chung Cheng and Tung-Han Hsieh to push Arphic Technology to release four Chinese TrueType fonts for the free software community under the Arphic Public License. He also wrote a book for CLE with others.

As Core Developer of GNU Gatekeeper (from 2001 to 2003), he developed new features like thread-safe runtime tables, neighbors and authentication modules, a full H.323 proxy and Citron's NAT technology. He wrote the first version of the English and Chinese manual for GnuGK. He won the first prize of Open Source Contest Taiwan in 2003.

He serves as a committer to KDE and GNOME, where he helps to translate .po files and fixes bugs related to Chinese. He is a contributor to pyDict, OpenH323, Asterisk, GStreamer etc. He works on a way to leverage the ASUS Eee PC with the power of the free software community and aims to provide a complete solution for Android on x86 platform. The Eee PC, VirtualBox, and QEMU are tested OK.

Chih-Wei Huang and Yi Sun started the Android-x86 Open Source Project in 2009. The project aims to bring Android to the x86 platform.

See also
 GNU Gatekeeper Project
 Android-x86 Open Source Project

References

External links
 
[ Chinese Linux Extensions Project]
The GNU Gatekeeper
[ The open source movement in Taiwan (台灣的開放源碼運動)]
[ Eee PC, Android, Linux and Open Source - Cwhuang's blog ]
[ Linux @ NTU]

1970 births
Free software programmers
Taiwanese computer programmers
Living people
Scientists from Taipei
Titanium Beta C. Titanium Beta C refers to Ti Beta-C, a trademark for an alloy of titanium originally filed by RTI International.  It is a metastable "beta alloy" which was originally developed in the 1960s; Ti-3Al-8V-6Cr-4Mo-4Zr, nominally 3% aluminum, 8% vanadium, 6% chromium, 4% molybdenum, 4% zirconium and balance (75%): titanium.

It is a heat-treatable, deep section hardenable, very high strength Titanium alloy possessing good toughness/strength properties, low elastic modulus and elevated resistance to stress and localized corrosion in high temperature sweet and sour brines.

Properties

Beta C is relatively easy to melt and process during fabrication, when compared with other beta alloys. It is not recommended in high-wear applications due to its tendency to gall. Beta C has good corrosion resistance to both saline environments and acids, due to the properties of titanium and to its ability to spontaneously form a well adhered protective oxide layer when exposed to a high oxygen environment. Beta C is one of the least dense beta alloys, which combined with its ability to achieve high strengths through heat treatment provides a good strength to weight ratio.  It is also capable of consistent high strength through relatively large section thicknesses.

Applications

The properties of Beta C have led to its use in a number of niche applications, including parts of aircraft landing gear and in fasteners used in the automotive industry.  Beta C is also used in oilfield applications such as pressure housings, shafts, valves and other critical components where very high strength and excellent corrosion resistance are required.  
It is approved for use in sour (H2S) applications. It is approved to be certified to meet NACE MR0175 and ISO 15156 with a maximum hardness of HRC 42.
It is available from the mill in forms: Ingot, Bloom, Bar, Billet, Seamless Pipe, and Wire.

Composition

Beta C is composed primarily of titanium, with relatively large (3-8.5% each) additions of molybdenum, aluminium, zirconium, chromium and vanadium, and smaller amounts (0.3 - 0.005% each) of iron, hydrogen, nitrogen, oxygen, yttrium, carbon, and other elements.

Designations
Other designations for Beta C include:
 Ti-3Al-8V-6Cr-4Mo-4Zr
 Ti-3-8-6-4-4
 ASTM Grade 19 and Grade 20 (with 0.05% Pd)
 AMS 4957
 AMS 4958
 AMS 4945
 MIL –T –9046 B3
 MIL –T –9047
 UNS R58640 (Grade 19)
 UNS R58645 (Grade 20)

References

Titanium alloys
Balcombe tunnel. Balcombe tunnel is a railway tunnel on the Brighton Main Line through the Sussex Weald between Three Bridges and Balcombe. It is  long. The track is electrified with a 750 V DC third-rail.

History

The tunnel was constructed by the London and Brighton Railway between 1838 and 1841, through Grinstead Clay, with five ventilation shafts. The engineer for the line was John Urpeth Rastrick; the contractor responsible for the brick-lined tunnel is not known.
Ingress of water from the ground above was experienced during the construction of the tunnel, and this has remained a problem throughout its history. Rastrick described the tunnelling as very treacherous, requiring great caution on the part of the miners working it, as "it swells and effloresces as soon as exposed to the air." Between 1907 and 1909 the tunnel was partially relined with engineering brick.

Galvanised iron sheets were fitted to prevent the water falling on passengers in open carriages, but the blast from the steam locomotives and air pressure created by the passage of trains could result in the metal sheets being torn from the structure, creating a serious hazard. Thereafter drivers were warned about the hazard presented by hanging icicles.

The "railway murderer" Percy Lefroy Mapleton left the body of his victim Isaac Gold, whom he had robbed, in Balcombe tunnel in 1881.

In July 1903 plans were finalised for the boring of a second Balcombe tunnel as part of the scheme to quadruple the Brighton Main Line throughout, but these were never implemented.

In 1998/9 catchment trays were fitted under the tunnel's ventilation shafts to divert seeping ground water from the shafts into the track drainage system, with a sixth added in 2006/7. The trays consisted of steel decking, gutters and flashings which were installed under limited track possessions. The tray supports had failed by 2013, requiring the installation of additional support brackets, and the Office of Rail Regulation enforced improvements in tunnel examination procedures.

In 2018 and 2019, works were carried out to improve the tunnel, carrying out significant works on the drainage system, as well as replacing switches and crossings at Balcombe tunnel junction, as a part of wider works along the Brighton Mainline.

Views
North portal - see http://www.safeguardeurope.com/case_studies/tunnel_waterproofing_balcombe.php
Aerial view - see http://wikimapia.org/7962596/Balcombe-Tunnel
Junction works timelapse video - see https://www.youtube.com/watch?v=hVsKl3fiquQ

References

Railway tunnels in England
Tunnels completed in 1841
London, Brighton and South Coast Railway
Rail transport in West Sussex
Tunnels in West Sussex
1841 establishments in England
Rigibore. Rigibore is a British-American manufacturer of special tools based in Hayle, Cornwall, UK, and Mukwonago, Wisconsin, US.

Founded in 1983, Rigibore supplies tools, cartridges, units and inserts, generally for use in CNC machining, as well as developing high-precision tooling solutions.  Rigibore won the Institution of Mechanical Engineers Manufacturing Excellence Award for Best SME in 2002 and Best Practice in IT in 2003.

In 2007 the Smartbore product range was launched, which allows fine adjustments to be made to a tool without removing it from a machine spindle.

In 2008 Rigibore launched its ActiveEdge products which utilise a wireless link to allow micrometre-accurate adjustments to be made to tooling.

References

External links

Rigibore - official site

Manufacturing companies of the United Kingdom
Manufacturing companies based in Wisconsin
Companies based in Cornwall
Hayle
Systems analysis and design. Systems analysis and design, an interdisciplinary part of science, may refer to:

 Systems analysis, a method of studying a system by examining its component parts and their interactions
 Structured data analysis (systems analysis), analysing the flow of information within an organization with data-flow diagrams
 Systems design, the process of defining the architecture, components, and data of a system to satisfy specified requirements
 Object-oriented analysis and design, an approach to analysis and design of an application, system, or business that emphasizes modularity and visual modeling
 Service-oriented analysis and design, a method of service-oriented modeling to design business systems 
 Structured analysis, methods in software engineering for converting specified requirements into software programs and hardware configurations
 Structured systems analysis and design method, a systems approach to the analysis and design of information systems

See also 
 Structured data analysis (disambiguation)
 Systems thinking, examining complex systems as a whole
Jump wire. A jump wire (also known as jumper, jumper wire, DuPont wire) is an electrical wire, or group of them in a cable, with a connector or pin at each end (or sometimes without them  simply "tinned"), which is normally used to interconnect the components of a breadboard or other prototype or test circuit, internally or with other equipment or components, without soldering.

Individual jump wires are fitted by inserting their "end connectors" into the slots provided in a breadboard, the header connector of a circuit board, or a piece of test equipment.

Types 

There are different types of jumper wires. Some have the same type of electrical connector at both ends, while others have different connectors. Some common connectors are:
 Solid tips – are used to connect on/with a breadboard or female header connector. The arrangement of the elements and ease of insertion on a breadboard allows increasing the mounting density of both components and jump wires without fear of short-circuits. The jump wires vary in size and colour to distinguish the different working signals.
 Crocodile clips – are used, among other applications, to temporarily bridge sensors, buttons and other elements of prototypes with components or equipment that have arbitrary connectors, wires, screw terminals, etc.
 Banana connectors – are commonly used on test equipment for DC and low-frequency AC signals.
 Registered jack (RJnn) – are commonly used in telephone (RJ11) and computer networking (RJ45).
 RCA connectors – are often used for audio, low-resolution composite video signals, or other low-frequency applications requiring a shielded cable.
 RF connectors – are used to carry radio frequency signals between circuits, test equipment, and antennas.
RF jumper cables  - Jumper cables is a smaller and more bendable corrugated cable which is used to connect antennas and other components to network cabling. Jumpers are also used in base stations to connect antennas to radio units. Usually the most bendable jumper cable diameter is 1/2".

See also 

 Jumper (computing)
 Pin header

References

External links 

 What is a 'breadboard' '?
 Lego Electronic Lab Kit
 Techniques progressive wiring
 effective construction techniques

Electronic design
Eaton BladeUPS. The Eaton BladeUPS is a modular three-phase UPS system consisting of individual 6U 12 kW UPS units which can be paralleled together to create up to a 60 kW N+1 redundant UPS.  A feature of the BladeUPS is that the 6U cabinet houses both the UPS electronics and batteries; other modular systems house them separately.  The high power density and 6U form factor of the BladeUPS are targeted at the growing power demands of IT servers and equipment, especially blade servers.

The BladeUPS does not fall into a defined category for UPS type as it is a hybrid of a line interactive and online architecture, which Eaton calls Double Conversion on Demand.  During normal operation the BladeUPS operates as a line interactive UPS allowing it to be energy efficient.  When power conditions fluctuate outside preset standards, the unit switches into online mode (also known as double conversion).  Software upgrades by Eaton have allowed BladeUPS owners to defeat this hybrid architecture and force the unit to operate entirely in online (double conversion) mode.

Software
BladeUPS ships with Eaton’s LanSafe software which allows for UPS monitoring and commands.  The BladeUPS is compatible with Eaton’s Power Xpert and FORESEER software which provide additional monitoring and functionality.

Battery runtime
Up to four extended battery modules can be connected to each BladeUPS providing additional runtime.

Awards
BladeUPS was named a 2007 searchdatacenter.com Gold Product of the Year.

External links
 Eaton Corporation
 BladeUPS product page

Notes

Electric power systems components
Uninterruptible power supply
Comco. Comco is the de facto name of an American company operating two Boeing 757 aircraft.

Overview
Little is known about the exact nature of their operation, but the aircraft are believed to operate on behalf of the United States Department of Defense. There is speculation they are occasionally repainted to display military serial numbers instead of the customary civilian registration code. They are often confused with the similarly secretive and sparsely marked Boeing C-32B Gatekeeper aircraft, modified 757s operated by the U.S. Air Force.

The aircraft are painted white, and have either the word COMCO on the tail or stylized blue sweeps on the tail, fuselage, and engine cowling. The Federal Aviation Administration (FAA) registry lists the owner of the aircraft as L-3 Capital, assumed to be a subsidiary of defense contractor L3Harris Technologies.

When parked and unused, the aircraft have padlocks which seal each of the exits, a highly unusual modification for an aircraft of its type and size.

Fleet

As of June 2019, Comco operates 2 Boeing 757-200s, which both aircraft are operating in the defense segment of L3Harris. Both aircraft are powered by the Rolls-Royce RB-211. Until 2016, the planes used by Comco only had a black Comco lettering on the vertical stabilizer, with a partial black cheatline forward of the wing and "Boeing 757" in small lettering beneath the aft windows. In 2017, the lettering was replaced by small navy and teal swoosh graphics, and the Rolls-Royce logos on the engine nacelles were removed.

Incidents
In 2003, a Comco aircraft, registration N610G, was forced to land after being intercepted by aircraft from the Indian Air Force after it strayed into Indian airspace on a flight from Karachi to Malé. The flight was permitted to continue after the crew were interviewed by authorities.

References

External links

JetPhotos.com – Photos taken of Comco aircraft

Airlines established in 2002
Airlines based in Montana
American companies established in 2002
Boeing aircraft
Military airlines
Harold Lawson. Harold W. "Bud" Lawson (1937–2019) was a software engineer, computer architect and systems engineer. Lawson is credited with the 1964 invention of the pointer  in high-level programming languages (with "a lot of comments" from Donald Knuth and Douglas McIlroy). In 2000, Lawson was presented the Computer Pioneer Award by the IEEE for his invention.

In July, 2010 he published a new book entitled A Journey Through the Systems Landscape () with College Publications. The book provides a comprehensive discipline-independent approach to learning to "think" and "act" in terms of systems.

Amongst several academic appointments, his last position was as Professor of Telecommunications and Computer Systems at Linköping University where he co-founded its Department of Computer and Information Science in 1983.

He is a Fellow of ACM, Fellow and Life Member of the IEEE, and Fellow of the International Council on Systems Engineering INCOSE IEEE Charles Babbage Computer Pioneer and INCOSE Systems Engineering Pioneer.

Bud died in Stockholm on June 10, 2019, after a period of illness.

References 
6. Alvaro Videla. Kateryna L. Yushchenko — Inventor of Pointers (Dec 8, 2018). A Computer of One's Own Pioneers of the Computing Age https://medium.com/a-computer-of-ones-own/kateryna-l-yushchenko-inventor-of-pointers-6f2796fa1798

1937 births
2019 deaths
American computer scientists
American software engineers
American emigrants to Sweden
Academic staff of Linköping University
H. V. Jagadish. Hosagrahar Visvesvaraya Jagadish (Jag) is a computer scientist in the field of database systems research. He is a Fellow of ACM, Fellow of IEEE, Fellow of AAAS, the Distinguished University Professor of electrical engineering and computer science at the University of Michigan at Ann Arbor, the director of MIDAS (Michigan Institute for Data Science), and a Senior Scientific Director of the National Center for Integrative Biomedical Informatics established by the National Institutes of Health.

External links
Michigan Homepage

Database researchers
American computer scientists
Living people
University of Michigan faculty
Year of birth missing (living people)
General Electric CF700. The General Electric CF700 (military designation TF37) is an aft-fan turbofan development of the CJ610 turbojet. The fan blades are an extension of the low-pressure turbine blades.

Variants
CF700-2BBaseline aft-fan CJ610 variant rated at  for take-off
CF700-2VThe 2B modified for continuous vertical operation on the Lunar Landing Research Vehicle (LLRV) and Lunar Landing Training Vehicle (LLTV)
TF37-GE-1 Military version of the CF700-2V

Applications
 Dassault Falcon 20
 North American Sabreliner Series 75A and 80
 Lunar Landing Research Vehicle/Lunar Landing Training Vehicle

Specifications (CF700)

See also

References

External links
 GE CF700 web page
 Cutaway CF700 Turbofan Engine Model AE-06-700 
 Aft-fan CF700 cutaway

CF700
1960s turbofan engines
Medium-bypass turbofan engines
General Electric J73. The General Electric J73 turbojet was developed by General Electric from the earlier J47 engine. Its original USAF designation was J47-21, but with innovative features including variable inlet guide vanes, double-shell (inner and outer) combustor case, and 50% greater airflow was redesignated J73. Its only operational use was in the North American F-86H.

Design and development

An engine, uprated from the J47, was required for the F-86H. The mass flow was increased by relocating accessories from the centre of the compressor inlet to the underside of the engine. This allowed a reduction in blade hub diameter, which together with an increase in tip diameter, gave a bigger area for air to enter the compressor. The area through the combustion chambers also had to be increased. This was done by replacing the multiple individual chambers with a single annular casing with individual flame tubes or cans known as cannular.

The pressure ratio was increased and variable inlet guide vanes fitted to prevent low-RPM problems (rotating stall/blade flutter) with the higher design pressure ratio. A 2-stage turbine was required.

A low boost (10% at take-off) afterburner was fitted. It was known as a tailpipe augmentation (TPA) system.

Nuclear powered

Four J73 engines were converted to produce thrust using nuclear energy instead of jet fuel. Testing was done in 1957 at the Atomic Energy Commission's National Reactor testing station. The engines were modified to pass the compressor air through a heat exchanger, in which heat was transferred from a nuclear reactor, before entering the compressor turbine at 1,400 degrees F.

Variants

J73-GE-1
J73-GE-3 for the North American F-86H Sabre.
J73-GE-5 Variant intended for a proposed Advanced F-89.

Applications

 North American F-86H Sabre
 Republic YF-84J Thunderstreak, two prototypes

Specifications (J73-GE-3)

See also

References

Further reading

External links

General Electric J73 Turbojet – National Museum of the United States Air Force

J73
1950s turbojet engines
F-86 Sabre