History of High Speed Ship Development

2015 ◽  
pp. 27-63
Author(s):  
Peter J. Mantle
Keyword(s):  
High Speed ◽  
History Of

Multiple phase transitions investigated by high-speed TEM

1990 ◽  
Vol 48 (4) ◽  
pp. 550-551
Author(s):  
Oleg Bostanjoglo ◽  
Peter Thomsen-Schmidt
Keyword(s):  
Phase Transitions ◽  
High Speed ◽  
Short Exposure ◽  
Semiconductor Film ◽  
Time Resolved ◽  
Short Exposure Time ◽  
Multiple Phase ◽  
Model Substance ◽  
History Of ◽  
Electron Image

Thin GexTe1-x (x = 0.15-0.8) were studied as a model substance of a composite semiconductor film, in addition being of interest for optical storage material. Two complementary modes of time-resolved TEM were used to trace the phase transitions, induced by an attached Q-switched (50 ns FWHM) and frequency doubled (532 nm) Nd:YAG laser. The laser radiation was focused onto the specimen within the TEM to a 20 μm spot (FWHM). Discrete intermediate states were visualized by short-exposure time doubleframe imaging /1,2/. The full history of a transformation was gained by tracking the electron image intensity with photomultiplier and storage oscilloscopes (space/time resolution 100 nm/3 ns) /3/. In order to avoid radiation damage by the probing electron beam to detector and specimen, the beam is pulsed in this continuous mode of time-resolved TEM,too.Short events ( <2 μs) are followed by illuminating with an extended single electron pulse (fig. 1c)

THE 35TH ANNIVERSARY OF PRODUCTION OF THE DT-175S "VOL-GAR" TRACTOR

2021 ◽  
Vol 1 (142) ◽  
pp. 163-177
Author(s):  
Vyacheslav V. Kosenko ◽  
◽  
Vladimir V. Sharov ◽  
Yuliya S. Tsench ◽  
◽  
...  
Keyword(s):  
High Speed ◽  
Research Purpose ◽  
Mechanical Transmission ◽  
Machine Operators ◽  
History Of ◽  
Close Cooperation ◽  
The Creation ◽  
Agricultural Tractors ◽  
Tractor Driver ◽  
Tractor Plant

The article, dedicated to the 35th anniversary of the start of production at the Volgograd Tractor Plant of the tracked agricultural tractor DT-175S "Volgar", tells about the history of the creation of this unique machine in its own way. (Research purpose) The research purpose is in analyzing the history of the creation and production, the effectiveness of the use of the DT- 175S "Volgar" tractor, considering the stages and directions of its improvement. (Materials and methods) The article de-scribes the history of the creation of the high-speed energy-saturated tractor "Volgar", gave its design features, technical characteristics in comparison with its predecessors, the results of tests in various soil and climatic zones, on various agricultural operations. (Results and discussion) In the DT-175S "Volgar" tractor, the designers, in close cooperation with scientists, embodied the results of research aimed at increasing the working speeds of machine-tractor units, and the most advanced technical solu-tions in the field of tractor construction at that time. The main of these solutions is an automatic continuously variable hydro-mechanical transmission. The combination of a powerful (125 kilowatt) engine with a similar transmission allowed not only signifi-cantly increase the working speed and productivity of the tractor, up to 9-15 kilometers per hour, but also significantly reduce the labor intensity of the tractor driver. The article presents the information about the improvement, modernization of the tractor, the creation of various specialized modifications on its basis. DT-175S "Volgar" be-came the most powerful serial machine of the Volgograd Tractor Plant, rightfully earned the respect of specialists of farms and machine operators. (Conclusions). Further development of the application of the automatic hydro-mechanical transmission on agricultural tractors was to receive the VT-200D tractor of 5th traction class with a capacity of 147 kilowatts. Due to the complication of the economic situation, the production of this tractor was lim-ited to only a small experimental batch.

High Speed Locomotive Development: A European Experience

2010 ◽  
Author(s):  
Janis Vitins
Keyword(s):  
Power Unit ◽  
High Speed ◽  
Propulsion System ◽  
European Experience ◽  
History Of ◽  
And Performance

Europe has a long history of high speed locomotive and power unit development. This paper focuses on these developments in Sweden, Germany, Switzerland and Spain starting from high speed locomotives for 125 mph and ending with the AVE S112 high speed power unit for 206 mph. The major technical objectives starting in the 1970’s were to increase the speed and performance, while reducing the axle load from typically 21t at 125 mph to 17t at ≥ 156 mph. Developments of the propulsion system and vehicle concepts took place in many incremental steps, constantly improving the performance of high speed services. It is shown how American high speed locomotives relate to these developments and how one can learn from the European experience going forward.

scholarly journals The history of national constructions of 1940 (by the example of the Ferghana Valley)

2020 ◽  
Vol 9 (1) ◽  
pp. 189-192
Author(s):  
Kabulzhan Makhamadzhanovich Nasritdinov
Keyword(s):  
20Th Century ◽  
High Speed ◽  
Hydraulic Structures ◽  
Irrigated Agriculture ◽  
Irrigation Canals ◽  
Soviet Government ◽  
Ferghana Valley ◽  
History Of ◽  
Agricultural Areas

Based on scientific, historical and archival sources the author of the paper analyzes the history of developing plans aimed at irrigation of virgin lands in the central part of the Ferghana Valley in the first half of the 20th century by large Russian scientists and specialists. The author also shows a historical picture of the construction of the irrigation facilities of the Ferghana Valley using the high-speed hashar folk method in 1940. With the construction of hydraulic structures such as the northern and southern Ferghana canals, a new stage began in the development of irrigated agriculture in the Ferghana Valley, since the water of these hydraulic structures made it possible to irrigate new virgin lands in the central part and foothill areas of the Ferghana Valley. But it should be noted that these large and complex irrigation canals were constructed by the peoples of Uzbekistan mainly with the use of primitive tools such as a hoe, a crow, a shovel, a stretcher and pickaxes. For nearly 80 years, these hydraulic structures have provided agricultural areas with life-giving water. The author of the paper also summarizes the essence of economic measures carried out by the Soviet government on the development of irrigated agriculture in the valley.

Railway Territorialities

Transfers ◽  
2020 ◽  
Vol 10 (2-3) ◽  
pp. 230-249
Author(s):  
Mateusz Laszczkowski
Keyword(s):  
Social Relations ◽  
High Speed ◽  
Social Space ◽  
Participant Observation ◽  
High Speed Rail ◽  
Ethnographic Fieldwork ◽  
History Of ◽  
Local Residents ◽  
Traffic Corridor ◽  
Transnational Space

This article examines transportation infrastructures’ capacity to produce and transform social space through a focus on the contested history of railway development in Valsusa, Italy. I draw on participant observation and interviews with local residents and activists during ethnographic fieldwork in 2014–2015. I first describe how railways helped form modern sociality in Valsusa in the twentieth century. Subsequently, I explore contrasting topological effects of a projected high-speed rail through the valley. For planners envisioning a trans-European space of exchange, the railway is a powerful way to “shrink” space; for local residents, this implies reducing Valsusa to a traffic “corridor.” Yet their protest generates new social relations and knowledges, giving rise to a notion of “territory” as unbound and connected to a transnational space of resistance to capitalist expansion.

Railway Territorialities

Transfers ◽  
2020 ◽  
Vol 10 (2-3) ◽  
pp. 230-249
Author(s):  
Mateusz Laszczkowski
Keyword(s):  
Social Relations ◽  
High Speed ◽  
Social Space ◽  
Participant Observation ◽  
High Speed Rail ◽  
Ethnographic Fieldwork ◽  
History Of ◽  
Local Residents ◽  
Traffic Corridor ◽  
Transnational Space

Abstract This article examines transportation infrastructures’ capacity to produce and transform social space through a focus on the contested history of railway development in Valsusa, Italy. I draw on participant observation and interviews with local residents and activists during ethnographic fieldwork in 2014–2015. I first describe how railways helped form modern sociality in Valsusa in the twentieth century. Subsequently, I explore contrasting topological effects of a projected high-speed rail through the valley. For planners envisioning a trans-European space of exchange, the railway is a powerful way to “shrink” space; for local residents, this implies reducing Valsusa to a traffic “corridor.” Yet their protest generates new social relations and knowledges, giving rise to a notion of “territory” as unbound and connected to a transnational space of resistance to capitalist expansion.

Development of algorithms that simulate the solution of a problem by a person

2022 ◽  
Vol 1 ◽  
pp. 01006
Author(s):  
Iurii V. Filatov
Keyword(s):  
Artificial Intelligence ◽  
High Speed ◽  
Separate Study ◽  
Human Actions ◽  
History Of ◽  
Human Thinking ◽  
Problem Comparison ◽  
The Way

Some algorithms, which are often based on the use of elements of higher mathematics, possessing high speed and compact coding in algorithmic languages, are poorly mastered by most students. It can be assumed that this is due to the difficulty of presenting the principles of their work in the form of human actions in ordinary situations. Thus, a certain contradiction arises between the way of solving the problem that a person resorts to without using a computer and the way we force our computer to solve this problem. Comparison of the process of explaining algorithms speaks in favor of algorithms imitating human thinking. The discussion of the advantages of the algorithms themselves is beyond the scope of this article and undoubtedly deserves a separate study. If artificial intelligence is created, then its creator or creators will certainly be ranked among the outstanding geniuses in the history of civilization, no matter what algorithms it uses. However, so far there is no one to solve problems for us and create algorithms, so we will use all available means and try to teach this to children.

A History of Public Mapping

2018 ◽  
pp. 16-28
Author(s):  
Michael P. McDonald ◽  
Micah Altman
Keyword(s):  
Supreme Court ◽  
Open Source ◽  
General Public ◽  
High Speed ◽  
Public Access ◽  
The Public ◽  
The Supreme Court ◽  
History Of ◽  
Equal Population ◽  
The Web

This chapter discusses the history of public mapping. The earliest reform efforts in redistricting were made possible because districts were primarily drawn out of large geographic units such as counties, which greatly simplified the redistricting task. That task grew more complex in the early 1960s, when the Supreme Court ruled that districts had to be of roughly equal population: counties would now often have to be split between two or more districts. The increasing computational demands effectively shut the public out of redistricting, since redistricting could be performed only on extremely costly computer systems. The reemergence of public mapping began in the 1990s, when states began offering public access to computer terminals loaded with their redistricting software and data. Eventually, two technological innovations by 2010 made public mapping available to the general public. Organizations and individuals are now able to leverage high-speed internet and open-source software to disseminate easy-to-use redistricting systems through the Web.

High Speed Packet Access Broadband Mobile Communications

2009 ◽  
pp. 595-604
Author(s):  
Athanassios C. Iossifides ◽  
Spiros Louvros
Keyword(s):  
Mobile Communications ◽  
Rural Areas ◽  
High Speed ◽  
Data Transfer ◽  
Mobile Wimax ◽  
Major Step ◽  
Transfer Rates ◽  
Mobile Broadband ◽  
History Of ◽  
Broadband Market

Mobile broadband communications systems have already become a fact during the last few years. The evolution of 3G Universal Mobile Telecommunications Systems (UMTS) towards HSDPA/HSUPA systems have already posed a forceful solution for mobile broadband and multimedia services in the market, making a major step ahead of the main competitive technology, that is, WiMax systems based on IEEE 802.16 standard. According to the latest analyses (GSM Association, 2007; Little, 2007), while WiMax has gained considerable attention the last few years, HSPA is expected to dominate the mobile broadband market. The main reasons behind this forecast are: • HSPA is already active in a significant number of operators and is going to be established for the majority of mobile broadband networks worldwide over the next five years, while commercial WiMax systems are only making their first steps. • Mobile WiMax is a competitive technology for selection by operators in only a limited number of circumstances where conditions are favourable. Future mobile WiMax systems may potentially achieve higher data transfer rates than HSPA, though cell coverage for these rates is expected to be substantially smaller. In addition, WiMax technology is less capable in terms of voice traffic capacity, thus limiting market size and corresponding revenues. • In order to overcome the aforementioned disadvantages, WiMax commercial launches are expected to introduce a relative CAPEX disadvantage of at least 20–50% comparing to HSPA, in favorable cases, while there are indications of an increase by up to 5–10 times when accounting for rural areas deployments. The short commercial history of HSDPA (based on Rel.5 specifications of 3GPP) started in December of 2005 (first wide scale launch by Cingular Wireless, closely followed by Manx Telecom and Telekom Austria). Bite Lietuva (Lithuania) was the first operator that launched 3.6 Mbps. HSUPA was first demonstrated by Mobilkom Austria in November 2006 and soon launched commercially in Italia by 3 in December 2006. Mobilkom Austria launched the combination of HSDPA at 7.2 Mbps and HSUPA in February 2007. By September of 2007, less than two years after the first commercial launch, 141 operators in 65 countries (24 out of 27 in EU) have already gone commercial with HSDPA with 38 operators among them supporting a 3.6 Mbps downlink. In addition, devices supporting HSDPA/HSUPA services are rapidly enriched. 311 devices from 79 suppliers have already been available by September 2007, including handsets, data cards, USB modems, notebooks, wireless routers, and embedded modules (http://hspa.gsmworld.com).

‘Connecting the unconnected’: a critical assessment of US satellite Internet services

2019 ◽  
Vol 42 (2) ◽  
pp. 260-276 ◽  
Author(s):  
Matthew Graydon ◽  
Lisa Parks
Keyword(s):  
High Speed ◽  
Small Mass ◽  
Production Costs ◽  
Internet Technology ◽  
Internet Services ◽  
Internet Industry ◽  
Industry Research ◽  
History Of ◽  
Synchronous Orbit ◽  
Time And Energy

An estimated 4 billion people worldwide still lack reliable access to the Internet, with the majority concentrated in developing countries. It is within this context that a significant expansion of the satellite Internet industry is taking place, bringing grand visions of social and economic growth through connectivity. Previously dismissed as a limited technology due to high operating costs and latency, as well as the failure of early ventures like Teledesic, satellite Internet has re-emerged in recent years as a viable alternative to the time and energy-intensive practice of laying thousands of miles of fiber optic cable. Utilizing innovative non-synchronous orbit constellations of small, mass-produced satellites that lower production costs and improve latency to better compete with broadband, new Silicon Valley–related companies such as OneWeb, SpaceX, and O3b have promised cheap, high-speed Internet access throughout the world. Drawing upon industry research, site visits, and interviews with technical specialists, development experts, and other actors, this article briefly explores the history of satellite Internet services, analyzes the promises of emerging satellite Internet companies, and argues that without serious commitments from governments and the private sector to follow through on this rhetoric, satellite Internet technology could fail to reach the communities that need it most.

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