omniomni/omni-engineering huggingface dataset:
Christian Huitema. Christian Huitema (born 1953 in Nantes, France) was the first non-American chair of the Internet Architecture Board (IAB), serving from April 1993 to July 1995. He currently is a consultant focused on privacy on the Internet.

Biography 
After graduating from the École Polytechnique, Huitema served for five years as an engineer at Sema Group in Montrouge before returning to the Centre national d'études des télécommunications (CNET; now part of Orange S.A.) in Issy-les-Moulineaux. In 1986, he joined the French Institute for Research in Computer Science and Automation (INRIA). Huitema collaborated on several research projects including the NADIR Project (jointly with CNET) to study the use of computer satellites, the European Strategic Program on Research in Information Technology's THORN project (first implementation of the X.500 distributed directory, precursor of ESPRIT's Paradise subproject), and the RODEO project (which aimed to define and test communication protocols for high-speed networks). He worked as a chief scientist for Bell Communications Research in the mid-1990s. At Microsoft, Huitema was involved with the development of 6to4 and Teredo tunneling.

References

External links 
 official website
 

1953 births
French computer scientists
Living people
Soft-switching three-level inverter. A soft-switching three-level inverter (S3L inverter) is a high-efficiency power electronic inverter intended, in particular, for use with three-phase drives, as a grid-tie inverter for photovoltaic installations or wind turbines and in power supplies. The topology was developed in 2009 at HTWG Konstanz (Constance University of Applied Sciences).

Operating principle 

Inverters are used for converting DC voltage into AC voltage. Their construction typically makes use of power transistors and diodes. These are operated as electronic switches. In conventional designs using "hard" switching, this gives rise to  which, especially for high values of the switching frequency, cause a reduction in their energy conversion efficiency. To improve their efficiency, high-power inverters (from about 10 kW) frequently make use of a technique referred to as a three-level design (three-level inverter).

Forming the basis of the S3L inverter is a hard-switching three-level inverter of this kind with a T-type topology. This base design is supplemented by a snubber circuit consisting of a few passive components. It prevents the occurrence of simultaneously high values of voltage and current, and hence high power dissipation values, during the switching process. All switching processes therefore take place in a "soft" manner. In this way switching losses are largely avoided. Furthermore, because the snubber circuit functions, in principle, without losses, the conversion efficiency of the inverter remains high even for high values of the switching frequency.

References 

Electrical power control
Edward Bormashenko. Edward Bormashenko (Hebrew: אדוארד בורמשנקו) is a professor of Materials Science and the Head of the Laboratory of Interface Science of the Ariel University in Israel. He was born in 1962 in Kharkiv, Ukraine and lives in Israel since 1997. He studied in the V. N. Karazin Kharkiv National University. His research is in the polymer science and surface science. He accomplished his PhD (supervised by Professor M. L. Friedman) in Moscow Institute of Plastics in 1990.

His scientific interests include: superhydrophobicity, superoleophobicity, creating of surfaces with prescribed properties, plasma- and UV-treatment of surfaces, plasma treatment of seeds, liquid marbles and their self-propulsion, the Moses effect (magnetically inspired deformation of liquid surfaces). Professor Bormashenko is also active in quantitative linguistics, topological problems of physics (exemplifications of the "hairy ball" theorem), advanced dimensional analysis (extensions of the Buckingham theorem), variational analysis of "free ends" physical problems, enabling application of the "transversality conditions".

In 1987 Dr. Bormashenko studied the mechanisms of destruction of ultra-thin island films by highly charged high-energy particles. In 2004 he investigated the vibrational spectrum of PVDF. In 2005-2006 he studied the breath-figures self-assembly and processes of patterning in rapidly evaporated polymer solutions. In 2006-2014 developed superhydrophobic and superoleophobic surfaces.

He is known for his pioneering research of wetting transitions, and analytical thermodynamic derivations of the Cassie and Wenzel equations using the variational calculus. In 2011-2018 spent much effort in the investigation of liquid marbles. In 2012 started to study the modification of surface properties of biological objects (seeds) with the cold plasma. In 2015-2018 studied the self-propulsion processes inspired the Marangoni flows. In 2017-2018 participated in the investigation of the droplet cluster. In 2017-2018 studied the Moses Effect (deformation of diamagnetic liquid/vapor surface with a magnetic field). He is one of the most productive and cited scientists in Ariel University.

Dr. Bormashenko is also known for his numerous philosophical essays (written in Russian language) in which he investigates the Jewish religious thought, Russian literature and scientific methodology. The central motif of his work is seeking the truth in the post-modern time. Bormashenko was influenced by Merab Mamardashvili and Alexander Voronel. Professor Ed. Bormashenko is married and has four daughters.

References 

Israeli physicists
National University of Kharkiv alumni
1962 births
Living people
Jewish physicists
Academic staff of Ariel University
Renfe Class 730. The Renfe Class 730 or S-730<ref>From Serie 730 de Renfe</ref> (Spanish: Serie 730 de Renfe, manufacturer's designation Talgo 250 Dual) is a push-pull high-speed dual-gauge, dual-voltage and hybrid (electric and diesel) trainset consisting of 9 Talgo VII tilting coaches, two intermediate diesel-generator cars and two head electric power cars, used on Alvia services.Trayectos y Servicios - clase turista Renfe.es The class have been nicknamed patitos (ducklings/little ducks), due to the shape of the train nose. They are a variant of RENFE Class 130 modified to be able to run on both electric and diesel power, in order to extend higher-quality services to parts of Spain not on the electrified network.

Background and design
The trainsets are designed for high-speed services on conventional Iberian gauge () network and standard-gauge high-speed () lines; they can change gauge at low speed without stopping using Talgo's RD variable gauge system. The carriages are constructed from aluminium and incorporate the Talgo Pendular passive pendulum tilting system, are sealed against pressure differences for tunnel travel, and have underframe air conditioning, individual audio systems and video displays, rotating and reclining seats and power outlets.

The trainset consists of 13 cars, including 2 electric power cars, 2 diesel-generator cars and 9 passenger coaches between them. The power cars are technically special single-sided electric locomotives and do not have seats for passengers, nor do the diesel generator cars coupled behind them instead of the end passenger coaches of the Class 130 series trains. Diesel generator cars and passenger coaches have an articulated connection with common bogies. Passenger coaches including 6 second class coaches, 2 first class coaches and 1 bistro coach for restaurant/sales services. Capacity in standard class is 36 seated, in first class — 26 seats in one coach and 22 seats in another coach, which also has a single place for disabled people.

The power cars use AC traction motors controlled by IGBT inverters which include integrated auxiliary inverters. Signalling systems can include ETCS Level 2, LZB, ASFA and Ebicab900TBS.

2013 Santiago de Compostela accident

On 24 July 2013 a Renfe Class S730 running as the Alvia 4155 service from Madrid to Ferrol derailed in north-western Spain, killing 79, out of 218 passengers on board. The cause of the accident is not yet officially determined, but the train was alleged to be traveling over twice the posted speed limit while entering a curve, due to the absence of European Rail Traffic Management System (ERTMS).

 See also 
 Renfe Class 130
 List of high-speed trains
 Stamps with Renfe Class 730 

References

Other sources
Information on the crash absorption and coupling module of the S130 powerheads Esytech.deExternal links

Renfe Serie 130 Information from Ferropedia.es''

Alvia high-speed trains
Electric multiple units with locomotive-like power cars
Diesel multiple units with locomotive-like power cars
Passenger trains running at least at 250 km/h in commercial operations
25 kV AC multiple units
3000 V DC multiple units
Pyrite group. The pyrite group of minerals is a set of cubic crystal system minerals with diploidal structure. Each metallic element is bonded to six "dumbbell" pairs of non-metallic elements and each "dumbbell" pair is bonded to six metal atoms.

The group is named for its most common member, pyrite (fool's gold), which is sometimes explicitly distinguished from the group's other members as iron pyrite.

Pyrrhotite (magnetic pyrite) is magnetic, and is composed of iron and sulfur, but it has a different structure and is not in the pyrite group.

Pyrite group minerals 
Pyrite-group minerals include:

 Aurostibite 
 Cattierite 
 Dzharkenite 
 Erlichmanite 
 Fukuchilite 
 Gaotaiite 
 Geversite 
 Hauerite 
 Insizwaite 
 Kruťaite 
 Krutovite 
 Laurite 
 Penroseite 
 Pyrite 
 Sperrylite 
 Trogtalite 
 Vaesite 
 Villamanínite

References

External links
LFG Roland Pfeilflieger. The LFG Roland Pfeilflieger, (Arrow-flyer), was a German swept wing, single engine, two seat biplane built in Germany in 1914.  It made one distinguished long duration flight and served in colonial German South-West Africa.

Design and development

Just before World War I the term Pfeilflieger was used to describe a category of biplanes with swept back wings, a feature adopted to provide some automatic stability.  At least six other manufacturers (Ago, DFW, Harlan, Lohner Daimler, Sommer and Union) as well as LFG designed and built them, though some had less sweep than others. Most had Pfeilflieger in their name.

The LFG Arrow was amongst the more strongly swept of the class.  It had wings of unequal span, with ailerons only on the overhung upper planes.  There was marked  dihedral on the lower wing but none on the upper.  With three pairs of long interplane struts on each side, the LFG was a three bay biplane with a large interplane gap.  It could be powered either by a  Mercedes D.I water cooled six cylinder inline engine or by a four-cylinder inline Argus As I engine of the same output.  The Argus engined version had a span reduced by , 81% of the wing area and a slightly longer fuselage.

The fuselage was flat sided and rectangular in section, with the engine exposed in the nose and the passenger/observer's cockpit immediately behind it. In some engine installations the radiator was mounted along the fuselage side, with this cockpit between them.  The pilot's cockpit, fitted like the passenger's with a celluloid windscreen, was much further aft at about mid-fuselage with the main fuel tank between them.  Because the LFG had a very broad chord, low aspect ratio horizontal tail of the sort known at the time as "Taube type", he sat not far in front of its leading edge. The tailplane carried an undivided elevator. There was a triangular fin and a high, rounded and balanced rudder.  The Arrow had a fixed, conventional undercarriage with V-form struts, their leading members bent round into short skids laterally connected by a rod to which the wheels, on their single axle, were joined via rubber shock absorbers.

Operational history
Before the outbreak of World War I Bernard Langer flew a Roland Pfeilflieger, equipped with a Mercedes engine and extra tankage in place of the passenger, on a non-stop sixteen-hour flight. During the war at least one LFG Roland Pfeilflieger served with the Schutztruppe (Protection Force) in German South-West Africa, now Namibia between 1914 and 1915.

Variants
Mercedes D.I engine as described
Argus As I engine span ; length ; wing area

Specifications (with Mercedes D.I engine)

References

Biplanes
1910s German aircraft
Roland Arrow
Aircraft first flown in 1914
Single-engined tractor aircraft
IPC Systems. IPC Systems, Inc. is an American company headquartered in State Street, Manhattan, New York, that provides and services voice communication systems for financial companies. In 2014, IPC Systems employs approximately 1,000 employees throughout the Americas, EMEA and Asia-Pacific regions

IPC's products, called trading turrets, are specialized, multi-line, multi-speaker communications devices used by traders. Turrets can have access to hundreds of lines and allow traders to monitor multiple connections simultaneously to maintain communication with counterparties, liquidity providers, intermediaries and exchanges  IPC's desktop system for traders provides multiple market data screens and gives traders the option to use instant messaging for colleague communications while checking on incoming calls.

In 2010, IPC was described by Waters Technology as the "Best Trading Turret Provider" Companies that provide similar services to IPC Systems include BT and Orange Business Services

History 
IPC was founded as Interconnect Planning Corporation, a consulting company, in 1973. Its voice communication system was created after Republic National Bank approached IPC founder Stephan Nichols with a request to improve the bank's trading hardware

In 2000, IPC Systems and its subsidiary IXnet were purchased by Global Crossing.

Then, in 2001, IPC Systems was sold by Global Crossing and purchased by Goldman Sachs.

IPC was the first to use Voice over Internet Protocol (VoIP) on the trading floor; this reduced communication costs.  The company introduced the first VoIP-based turret in 2001 and its second generation VoIP based turret, the IQ/MAX, in 2006.

Goldman Sachs sold the company to Silver Lake Partners in 2006 for $800 million. In 2014, Centerbridge Partners announced that it had agreed to acquire IPC Systems from Silver Lake Partners.

IPC Systems also developed a division called Positron Public Safety, which developed similar systems for use by 911 operators and other dispatchers. This was sold in 2008 to rival Intrado.

References 

1973 establishments in New Jersey
Companies based in Jersey City, New Jersey
Consulting firms established in 1973
Telecommunications equipment vendors
Telephone exchange equipment
Electronics companies established in 1973
Journal of Structural Engineering. The Journal of Structural Engineering is the principal professional peer-reviewed journal of the  American Society of Civil Engineers, the oldest professional civil engineering society in the United States. The journal is one of the flagship journals of the Society. It is sponsored by its division, the ASCE Structural Engineering Institute.

Scope 
This journal shares knowledge and advances in the field of structural engineering. Topics that are covered include structural modeling and design; analytical, computational and experimental simulation techniques; and discuss methods for maintaining, rehabilitating monitoring existing structures, sustainable structures, resilient infrastructure, and state-of-the-art / state-of-practice content.

History 

Originally, the journals was part of the proceedings of the American Society of Civil Engineers, first published in 1873
The Journal started publishing separately in 1956 as part of the ASCE Journal of the Structural Division (). In 1983, the title was changed to the Journal of Structural Engineering ().

Past Editors of the Journal include:
John E. Bower: Vol. 107 No. 6 (1 Year 3 Months)
Donald Mcdonald: Vol. 108 No. 10 (1 Year 11 Months)
Thomas G. Williamson: Vol. 110 No. 10 (2 Years 1 Month)
Alfredo H-S. Ang: Vol. 112 No. 11 (4 Years 1 Month)
James T.P. Yao: Vol. 116 No. 12 (1 Year 10 Months)
Vernon B. Watwood: Vol. 118 No. 11 (1 Year 11 Months)
David Darwin: Vol. 120 No. 11 (5 Years 10 Months)
C. Dale Buckner: Vol. 126 No. 10 (2 Years 11 Months)
Sashi Kunnath: Vol. 129 No. 10 (7 Years)
Sherif El-Tawil: Vol. 136 No. 10 (Present)

Metrics

Indexes 

The Journal of Structural Engineering is indexed in Scopus, Web of Science, and  Engineering Index, Civil engineering database, OCLC (WorldCat). It is available on ProQuest and EbscoNet.

References

External links 
 ASCE Library
Journal home page and editorial board

Structural engineering
English-language journals
Structural engineering
American Society of Civil Engineers academic journals
LFG V 60. The LFG V 60 was a small, single engine, tandem seat floatplane training aircraft, designed and built in Germany in the mid-1920s. About five were constructed.

Design and development

The LFG V 60 was a biplane floatplane, with wings of constant chord and with rounded wing tips; they were of approximately equal span and mounted with little stagger.  It was a two bay biplane with pairs of parallel interplane struts, though the inner bay was quite narrow.  There were ailerons on both upper and lower planes, externally connected.

Its engine was a  six cylinder inline, water cooled BMW IV, mounted with its cylinder heads exposed, which drove a two blade propeller.  The fuselage was flat sided and accommodated the two crew in a continuous open, tandem cockpit.  The tailplane was mounted on top of the fuselage and the vertical tail was tall and rounded, the rudder extending below the keel.  The V 60 had twin float landing gear attached to the wing and lower fuselage on a number of V-struts and laterally cross braced.

Operational history
One V 60 was entered into the German Seaplane Competition held in July 1926 on the Baltic coast. During one flight the pilot, Haase, put down on the sea to make some adjustment but was swept away.  The aircraft and its passenger were rescued.

Two other V 60s were registered to DVS GmbH early in 1928.

Operators
 DVS GmbH

Specifications

References

Biplanes
Floatplanes
1920s German civil aircraft
LFG V 61
Ultrasonic cavitation device. Ultrasonic cavitation device is a surgical device using low frequency ultrasound energy to dissect or fragment tissues with low fiber content. It is basically an ultrasound  probe (acoustic vibrator) combined with an aspirator device (suction).

It is mainly used for tissues with high water content and low fiber content, like noncirrhotic liver and pancreas. It has advantages of less blood loss, improved visibility and less collateral tissue damage. It is used in number of surgical procedures such as resection of small endocrine pancreatic tumours, partial nephrectomy, salvage splenectomy, head and neck procedures and gynecological tumours.

See also
Instruments used in general surgery

References

Surgical instruments
Spectrometric Oil Analysis Program. Spectrometric Oil Analysis Program (SOAP) is a method used by aircraft operators, including several Air Forces of the World, to test the health of aircraft engines by performing frequent laboratory testing of the engine oil. The tests reveal the chemical composition of any metal particles suspended in the oil samples. By comparing the results to the known chemical composition of various engine parts, abnormal wear of engine parts can be identified, and servicing of the engine can be initiated, thus sometimes avoiding further costly repairs or even catastrophic engine failure.

References

Aircraft maintenance
Dnipro National University of Rail Transport. Dnipro National University of Railway Transport named after academician V. Lazaryan (DIIT) (Ukrainian: Дніпровський національний університет залізничного транспорту імені В. Лазаряна, previously Dnipropetrovsk University) is a higher educational institution of the 4th (maximum) level of state accreditation in Ukraine.

It was founded in 1930 as the Institute of Railway Transport Engineers.

Structure 
The structure of the University comprises 11 departments:

 Bridges and Transport Tunnels

 Electrification of Railway Transport

 Mechanical Engineering

 Railway Traffic Control

 Railway Track Construction and Maintenance

 Civil and Industrial Engineering

 Economics and Management in Transport

 Technical Cybernetics

 Humanities and work with foreign students

 Extra-Mural Training of Specialists and Up-grading Qualification Department

See also
 Open access in Ukraine

References 

Universities and colleges in Dnipro
Universities and colleges established in 1930
National universities in Ukraine
1930 establishments in Ukraine
Engineering universities and colleges in Ukraine
Railway schools
CCSDS MO Services. The Spacecraft Monitoring & Control (SM&C) Working Group of the Consultative Committee for Space Data Systems (CCSDS), which sees the active participation of 10 space agencies and of the Space Domain Task Force of the Object Management Group (OMG), is defining a service oriented architecture consisting of a set of standard end-to-end services between functions resident on board a spacecraft or based on the ground, that are responsible for mission operations.

The CCSDS Mission Operations (MO) Services provides a set of standard operations services for the day-to-day operation of space assets and are outlined in the CCSDS Mission Operations Services Concept.

Service Definition 
Each service is defined in terms of an information model that defines a set of object types that are shared by providers and consumers of the service. Examples of such object types are status parameters, control actions and notification alerts, orbit vectors, schedules, planning requests and software images.

In addition to definition of the static information model, the service defines the interactions (through extension of the patterns defined in the Message Abstraction Layer) required between service provider and consumer to allow:
 the service consumer to observe the status of objects through a flow of update messages;
 the service consumer to invoke operations upon the objects.

The specification of an MO service defines the structure of the objects, however, each deployment (or instantiation) of a service will also require service configuration data that defines the actual instances of those object types that exist for that service instance.  For example, the M&C service may define what parameters, actions and alerts are, but it is the associated service configuration data that specifies the set of parameters, actions and alerts that exist for a particular spacecraft.

Identified Mission Operations Services 
The following table lists the application-level Mission Operations services that have currently been identified by the working group.  It is to be stressed, however, that the service framework is designed to be extensible and additional services may be identified in the future to address additional requirements for end-to-end interaction in mission operations.

NOTE – Services are listed together with a summary of the associated Service Objects and Operations.

See also 

 NanoSat MO Framework

References 

29335606771

Space standards
Consultative Committee for Space Data Systems
Login manager. A login manager is a login system for Unix and Unix-like operating systems. It comprises a login daemon, a login user interface, and a system for tracking login sessions. When a user tries to log in, the login manager passes the user's credentials to an authentication system.

Since an X display manager is a graphical user interface for login, some people use the terms display manager and login manager synonymously.

systemd, an init daemon for Linux, has an integrated login manager; its login daemon is called logind. systemd's login manager is a replacement for the no longer maintained ConsoleKit.

See also
 BSD Authentication
 Name Service Switch
 passwd
 Pluggable authentication module

References

Computer access control
Unix process- and task-management-related software