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1 – 10 of 348
Article
Publication date: 1 June 2000

Michael Fosmire

The phenomenon of superconductivity has been studied for 90 years, with the latest surge in popularity occurring in the late 1980s, when high‐temperature superconductors…

Abstract

The phenomenon of superconductivity has been studied for 90 years, with the latest surge in popularity occurring in the late 1980s, when high‐temperature superconductors were first created. In this time much progress has been made to create commercially viable applications of the technology and understand the theory behind the phenomenon. Furthermore, at a time when national science policy was undergoing close scrutiny, the high‐temperature superconductor boom served as a high‐profile case study of the role of government in spurring the acceptance of new technologies. This bibliography provides resources that chronicle the technological and scientific developments in the field since its discovery and the policy decisions and issues that governments and society made when faced with a possible scientific revolution.

Details

Reference Services Review, vol. 28 no. 2
Type: Research Article
ISSN: 0090-7324

Keywords

Article
Publication date: 18 January 2011

Qilun Zhu and Peter Willett

The purpose of this paper is to carry out a bibliometric analysis of the development of Chinese research in superconductivity since the advent of high‐temperature…

Abstract

Purpose

The purpose of this paper is to carry out a bibliometric analysis of the development of Chinese research in superconductivity since the advent of high‐temperature superconductivity (HTS) in the mid‐1980s, and to compare Chinese research with that of its international competitors.

Design/methodology/approach

This research used publications, citations, journals, subject categories and institutional data from the Web of Science database.

Findings

Chinese HTS research has grown steadily in importance over the period, with a significant increase in peer‐recognition, as measured by citations from non‐Chinese researchers. A comparison with superconductivity research in England, France, Germany, Japan, Russia and the USA shows that the impact of the Chinese work is growing relative to the other countries, with a cluster analysis showing that the current bibliometric status of Chinese research is most similar to that of England, France and Russia.

Originality/value

This is both the first bibliometric study of Chinese research in superconductivity and the first bibliometric comparison of different countries' research in superconductivity since the advent of HTS. Cluster analysis provides an interesting way of identifying analogous international bibliometric profiles.

Details

Aslib Proceedings, vol. 63 no. 1
Type: Research Article
ISSN: 0001-253X

Keywords

Article
Publication date: 4 July 2008

Alexander Bolonkin

This paper aims to suggest a new revolutionary method and installation for flight on Earth and into outer space.

Abstract

Purpose

This paper aims to suggest a new revolutionary method and installation for flight on Earth and into outer space.

Design/methodology/approach

Methods of electromagnetic physics are used for research and the theory of levitation vehicles is developed and its possibilities researched.

Findings

It was found that levitation devices and electricity storage make a jump in aviation, space, storage and transfer energy and many branches of industry.

Practical implications

Many projects were calculated using different versions of the offered AB engine: a small device for levitation‐flight of a human (including flight from Earth to outer space), fly VTOL car (track), big VTOL aircraft, suspended low‐altitude stationary satellite, powerful Space Shuttle‐like booster for travel to the Moon and Mars without spending energy (spent energy is replenished in braking when the ship returns from another planet to its point of origin), using AB‐devices in military, in sea‐going ships (submarines), in energy industry (for example, as small storage of electric energy) and so on. The vehicles equipped with AB propulsion can take flight for days and cover distances of 10,000s of kilometers at hypersonic or extra‐atmosphere space speeds.

Originality/value

The paper promises a new revolutionary method of flight on Earth and into outer space.

Details

Aircraft Engineering and Aerospace Technology, vol. 80 no. 4
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 1 April 1991

L.Y. Chen, G. Levine, J. Yang and C.S. Ting

A stochastic process with repulsive correlation is proposed to simulate the nonequilibrium electronic transport through microstructures under finite bias voltage. Since an…

Abstract

A stochastic process with repulsive correlation is proposed to simulate the nonequilibrium electronic transport through microstructures under finite bias voltage. Since an electron needs to stay a finite time τ0 on a channel state while traversing the constriction structure, within τ0 other electrons can not follow up through the same channel state because of the Pauli exclusion. This quantum effect induces a time correlation and suppresses the shot noise. The Monte Carlo results fairly compare with experimental measurements.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 10 no. 4
Type: Research Article
ISSN: 0332-1649

Article
Publication date: 1 March 2001

T.A. Coombs, A.M. Campbell, A. Murphy and M. Emmens

A method is presented for calculating the critical state profiles in bulk superconductors. It can be used for asymmetric samples in non‐uniform fields and for transport…

Abstract

A method is presented for calculating the critical state profiles in bulk superconductors. It can be used for asymmetric samples in non‐uniform fields and for transport currents as well as magnetisation. In this technique the sample starts with no current flowing. Elements carrying Jc are then inserted at the point of maximum vector potential and the field recalculated. The process is continued until the external field is screened from the interior. As an example the force on a magnet above a cylindrical puck is calculated.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 20 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 September 1989

W.A. Southwood

Superconductivity has been around for most of this century. In 1911 Kamerlingh Onnes, a Dutch physicist, discovered that the resistance of mercury to electric current…

Abstract

Superconductivity has been around for most of this century. In 1911 Kamerlingh Onnes, a Dutch physicist, discovered that the resistance of mercury to electric current dropped effectively to zero at 4° Kelvin. This extremely low temperature — 452°F below zero — was able to be achieved by his production, three years earlier, of liquid helium.

Details

Facilities, vol. 7 no. 9
Type: Research Article
ISSN: 0263-2772

Article
Publication date: 1 June 2002

George K. Chacko

Develops an original 12‐step management of technology protocol and applies it to 51 applications which range from Du Pont’s failure in Nylon to the Single Online Trade…

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Abstract

Develops an original 12‐step management of technology protocol and applies it to 51 applications which range from Du Pont’s failure in Nylon to the Single Online Trade Exchange for Auto Parts procurement by GM, Ford, Daimler‐Chrysler and Renault‐Nissan. Provides many case studies with regards to the adoption of technology and describes seven chief technology officer characteristics. Discusses common errors when companies invest in technology and considers the probabilities of success. Provides 175 questions and answers to reinforce the concepts introduced. States that this substantial journal is aimed primarily at the present and potential chief technology officer to assist their survival and success in national and international markets.

Details

Asia Pacific Journal of Marketing and Logistics, vol. 14 no. 2/3
Type: Research Article
ISSN: 1355-5855

Keywords

Article
Publication date: 1 October 2004

A major restructuring program helped a developer and manufacturer of advanced scientific instrumentation to reduce its huge backlog of work, improve on‐time delivery and…

317

Abstract

A major restructuring program helped a developer and manufacturer of advanced scientific instrumentation to reduce its huge backlog of work, improve on‐time delivery and regain its place as a world leader in its field. Central to the restructuring at the UK’s 420‐employee Oxford Instruments Superconductivity (OIS), which specializes in designing and manufacturing superconducting magnets and cryogenic systems, was the recruitment of 85 new technical staff.

Details

Human Resource Management International Digest, vol. 12 no. 6
Type: Research Article
ISSN: 0967-0734

Keywords

Article
Publication date: 1 March 2004

H. May, R. Palka, E. Portabella and W‐R. Canders

To describe the wide range of possible applications of high temperature superconductors (HTSCs) (e.g. magnetic bearings, levitation systems or electrical machines) several…

Abstract

To describe the wide range of possible applications of high temperature superconductors (HTSCs) (e.g. magnetic bearings, levitation systems or electrical machines) several appropriate calculation algorithms have been developed. They determine the force interaction between a superconductor and any even multidimensional magnetic field excitation system. Especially good agreements between experiments and computed results have been obtained for the Vector‐Controlled Model, which seems to be the best approximation of the macroscopic superconductivity behaviour. The validation of this model by means of measurements makes it a powerful tool for the design and optimisation of any HTSC application in the field of force generation. It can be used not only for the designing of levitation applications, but also to help the understanding of the flux penetration, flux trapping and magnetisation of bulk superconductors in non‐uniform magnetic fields. By means of this model, the force interaction between superconductors and external magnetic fields for practical multi‐polar configurations, e.g. superconducting levitation systems or inherently stable superconducting bearings has been determined. Furthermore, the time dependency of the forces taking flux flow and flux creep into account, can be considered.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 23 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 30 September 2014

Devaiah Nalianda and Riti Singh

With the predicted rise in air traffic, a growing need exists to make the aviation industry more environmentally sustainable in the long-term future. Research has shown…

1087

Abstract

Purpose

With the predicted rise in air traffic, a growing need exists to make the aviation industry more environmentally sustainable in the long-term future. Research has shown that the turbo-electric distributed propulsion system (TeDP) could be the next disruptive technology that has the potential to meet the ambitious environmental goals set for the N + 3 time frame. This however will require the use of superconductivity, application of high-temperature superconducting materials and cryogenic liquids. This paper provides a brief overview of the technology and further discusses the benefits, advantages and new opportunities that may arise from the application of the technology.

Design/methodology/approach

This paper provides a brief overview of the technology and further discusses the benefits, advantages and new opportunities that may arise from the application of the technology.

Findings

Implementation of superconducting technology is currently one of the greater challenges faced and hence this article also reviews some of the key considerations to enable utilisation of cryogenic fuels in the future.

Originality/value

This paper provides a viewpoint and reviews some of the work undertaken in the field. It also provides a perspective on some new possibilities and advantages from using TeDP with cryogenic fuels.

Details

Aircraft Engineering and Aerospace Technology: An International Journal, vol. 86 no. 6
Type: Research Article
ISSN: 0002-2667

Keywords

1 – 10 of 348