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Article
Publication date: 1 June 2006

Uri Fidelman

This study seeks to explain how a cybernetic system, the human brain, creates the cognitive models that are applied by physics to explain particular phenomena of the physical…

172

Abstract

Purpose

This study seeks to explain how a cybernetic system, the human brain, creates the cognitive models that are applied by physics to explain particular phenomena of the physical world, namely, the electrostatic force and the annihilation of matter and antimatter.

Design/methodology/approach

This study applies findings in cognitive psychology of vision, neuropsychology of the hemispheric mechanisms and quantum mechanics in order to explain how the electrostatic force operates at distance between two charged particles.

Findings

In addition to the quantum fields theory, which explains the electrostatic force by photons that carry this force between charged particles (and is related to the left‐hemispheric cognitive mechanism) a dual theory is suggested that explains this force by interchanging of features between particles (and is related to the right‐hemispheric cognitive mechanism).

Originality/value

Like Fidelman's previous studies, this too demonstrates that cybernetic considerations which use cognitive psychological, neuropsychological and physical‐knowledge can obtain testable and applicable physical theories.

Details

Kybernetes, vol. 35 no. 5
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 17 October 2018

Wojciech Konior, Romana Ratkiewicz and Jan Kotlarz

This paper aims to review the current knowledge about the neutral component of the local interstellar medium (LISM), which due to the resonant charge exchange, photoionization and…

Abstract

Purpose

This paper aims to review the current knowledge about the neutral component of the local interstellar medium (LISM), which due to the resonant charge exchange, photoionization and electron impact ionization processes has a profound impact on the heliosphere structure.

Design/methodology/approach

This work is based on the heliospheric literature review.

Findings

The summary of four major effects of neutral hydrogen atoms penetrating solar wind (SW), i.e. the disappearance of the complicated flow structure; the emergence of “hydrogen wall” in front of the heliopause (HP); decreasing distance of termination shock (TS), HP and bow shock (BS) layer from the Sun; and recently discovered by the Interstellar Boundary Explorer mission, a region of enhanced energetic neutral atom (ENA) emission seen in all sky maps as a ribbon.

Practical implications

In the context of constantly developing space technologies in aerospace engineering and prospective deep space missions, there is a need of general reviews about the interstellar space surroundings of the Sun and gathering the knowledge to help in theoretical, numerical and experimental investigations such as the optimization of the scientific equipment and spacecraft structure to work in specific conditions.

Originality/value

The survey encapsulate basic and relevant processes playing an important role in the physics of the nearest surroundings of the Sun and the latest results of numerical and experimental investigations focused on the neutral LISM component and its influence on the heliosphere, which is strongly desired in future works. Until now, not many of such reviews have been done.

Details

Aircraft Engineering and Aerospace Technology, vol. 91 no. 2
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 1 April 1991

Ming‐Cheng Cheng and E.E. Kunhardt

A non‐equilibrium multi‐valley transport model for carriers in compound semiconductor devices has been developed. This macroscopic transport model provides an efficient scheme for…

Abstract

A non‐equilibrium multi‐valley transport model for carriers in compound semiconductor devices has been developed. This macroscopic transport model provides an efficient scheme for device modeling, and can overcome the difficulty in evaluating the relaxation times in multi‐valley conservation equations without a priori assumption of the displaced‐Maxwellian distribution. This model has been successfully applied to electron transport in GaAs subjected to rapidly time‐varying fields. The results have suggested that the macroscopic effective mass of electrons might be strongly dependent on average velocity.

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: 21 August 2009

Anas N. Al‐Rabadi

The purpose of this paper is to introduce new non‐classical implementations of neural networks (NNs). The developed implementations are performed in the quantum, nano, and optical…

Abstract

Purpose

The purpose of this paper is to introduce new non‐classical implementations of neural networks (NNs). The developed implementations are performed in the quantum, nano, and optical domains to perform the required neural computing. The various implementations of the new NNs utilizing the introduced architectures are presented, and their extensions for the utilization in the non‐classical neural‐systolic networks are also introduced.

Design/methodology/approach

The introduced neural circuits utilize recent findings in the quantum, nano, and optical fields to implement the functionality of the basic NN. This includes the techniques of many‐valued quantum computing (MVQC), carbon nanotubes (CNT), and linear optics. The extensions of implementations to non‐classical neural‐systolic networks using the introduced neural‐systolic architectures are also presented.

Findings

Novel NN implementations are introduced in this paper. NN implementation using the general scheme of MVQC is presented. The proposed method uses the many‐valued quantum orthonormal computational basis states to implement such computations. Physical implementation of quantum computing (QC) is performed by controlling the potential to yield specific wavefunction as a result of solving the Schrödinger equation that governs the dynamics in the quantum domain. The CNT‐based implementation of logic NNs is also introduced. New implementations of logic NNs are also introduced that utilize new linear optical circuits which use coherent light beams to perform the functionality of the basic logic multiplexer by utilizing the properties of frequency, polarization, and incident angle. The implementations of non‐classical neural‐systolic networks using the introduced quantum, nano, and optical neural architectures are also presented.

Originality/value

The introduced NN implementations form new important directions in the NN realizations using the newly emerging technologies. Since the new quantum and optical implementations have the advantages of very high‐speed and low‐power consumption, and the nano implementation exists in very compact space where CNT‐based field effect transistor switches reliably using much less power than a silicon‐based device, the introduced implementations for non‐classical neural computation are new and interesting for the design in future technologies that require the optimal design specifications of super‐high speed, minimum power consumption, and minimum size, such as in low‐power control of autonomous robots, adiabatic low‐power very‐large‐scale integration circuit design for signal processing applications, QC, and nanotechnology.

Details

International Journal of Intelligent Computing and Cybernetics, vol. 2 no. 3
Type: Research Article
ISSN: 1756-378X

Keywords

Article
Publication date: 23 September 2022

Hamed Al-sorory, Mohammed S. Gumaan and Rizk Mostafa Shalaby

This paper aims to summarise the effects of ZnO nanoparticles (0.1, 0.3, 0.5, 0.7 and 1.0 Wt.%) on the structure, mechanical, electrical and thermal stability of Sn–3.5Ag–0.5Cu…

Abstract

Purpose

This paper aims to summarise the effects of ZnO nanoparticles (0.1, 0.3, 0.5, 0.7 and 1.0 Wt.%) on the structure, mechanical, electrical and thermal stability of Sn–3.5Ag–0.5Cu (SAC355) solder alloys for high-performance applications.

Design/methodology/approach

The phase identification and morphology of the solders were studied using X-ray diffraction and scanning electron microscopy. Thermal parameters were investigated using differential scanning calorimetry. The elastic parameters such as Young's modulus (E) and internal friction (Q−1) were investigated using the dynamic resonance technique, whereas the Vickers hardness (Hv) and creep indentation (n) were examined using a Vickers microhardness tester.

Findings

Microstructural analysis revealed that ZnO nanoparticles (NPs) were distributed uniformly throughout the Sn matrix. Furthermore, addition of 0.1, 0.3 and 0.7 Wt.% of ZnO NPs to the eutectic (SAC355) prevented crystallite size reduction, which increased the strength of the solder alloy. Mechanical parameters such as Young's modulus improved significantly at 0.1, 0.3 and 0.7 Wt.% ZnO NP contents compared to the ZnO-free alloy. This variation can be understood by considering the plastic deformation. The Vickers hardness value (Hv) increased to its maximum as the ZnO NP content increased to 0.5. A stress exponent value (n) of approximately two in most composite solder alloys suggested that grain boundary sliding was the dominant mechanism in this system. The electrical resistance (ρ) increased its maximum value at 0.5 Wt.% ZnO NPs content. The addition of ZnO NPs to plain (SAC355) solder alloys increased the melting temperature (Tm) by a few degrees.

Originality/value

Development of eutectic (SAC355) lead-free solder doped with ZnO NPs use for electronic packaging.

Details

Soldering & Surface Mount Technology, vol. 35 no. 3
Type: Research Article
ISSN: 0954-0911

Keywords

Article
Publication date: 1 February 1982

R.K. COOK and Jeffrey FREY

A transport model has been developed which is reasonably accurate, and has proven quite efficient for the two‐dimensional numerical simulation of submicron‐scale Si and GaAs…

Abstract

A transport model has been developed which is reasonably accurate, and has proven quite efficient for the two‐dimensional numerical simulation of submicron‐scale Si and GaAs devices. In this model an approximate form of the energy‐transport equation is developed; this equation is easily included in otherwise‐conventional device simulation codes, which then require only slightly more solution time than standard models using field‐dependent transport coefficients. Calculations for 0.25 micron gate length Si and GaAs MESFET's show that velocity overshoot effects can be very important, particularly in the latter material; predicted saturation currents in the GaAs devices are almost three times larger than those that would have been predicted using conventional transport models. The model described, and its application in simulation programs, should find use in the design of submicron‐scale devices to properly take advantage of overshoot phenomena.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 1 no. 2
Type: Research Article
ISSN: 0332-1649

Article
Publication date: 1 March 1975

Shirley Lowndes and Ian Sharp

The need for change in the management and administration of libraries is now well recognized. Current thought seems to be largely devoted to systems analysis and streamlining of…

Abstract

The need for change in the management and administration of libraries is now well recognized. Current thought seems to be largely devoted to systems analysis and streamlining of traditional library functions. Foskett, however, puts forward a view that libraries ‘are not closed and static systems, but must continually develop in relation to their environment, must be prepared to change the organization of their various parts in order to survive and fulfil the purpose for which they were created’. We endorse this view whilst stressing the need for the research library to be willing to expand its function to that of a system of communication as well as information. In fields of pure research which depend upon the rapid exchange of current knowledge it is necessary for an equal emphasis to be placed on both inward and outward communication. Providing the most useful service to scientific users within the confines of a stated number of staff and a restricted amount of money leads to a necessity for versatility in the staffing of such services.

Details

Aslib Proceedings, vol. 27 no. 3
Type: Research Article
ISSN: 0001-253X

Content available
Article
Publication date: 1 June 2004

188

Abstract

Details

Pigment & Resin Technology, vol. 33 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 2 November 2015

Gongmin Bao

This paper aims to address challenges in strategic management and tries to find ways to make a breakthrough. Strategic management theorists and practitioners need new scientific…

3952

Abstract

Purpose

This paper aims to address challenges in strategic management and tries to find ways to make a breakthrough. Strategic management theorists and practitioners need new scientific theories. In the modern turbulent environment, the extant strategic management research (SMR) and strategic management theories can neither satisfy the practical needs nor the theoretical developmental needs of strategic management.

Design/methodology/approach

The paper uses critique viewpoints that are unfolded according to the logic of how theories will satisfy the practical and theoretical needs. Physics and mathematics are regarded as the most beautiful and perfect scientific research fields, which help predict physical phenomena such as solar eclipse precisely. Therefore, the paper uses physics and mathematics as benchmarks to explore how SMR should make efforts to push the research further.

Findings

The paper provides a different viewpoint that will help strategic theorists and practitioners investigate and understand strategic phenomena more holistically. SMR should contribute to strategic theoretical and practical progress and not just to the game of academic game play. For the goal, the paper summarizes and refines the definition of strategic management in an alternative but practical and innovative perspective, and then delineates the criteria for SMR topic choice; identifies the dilemmas and challenges the SMR faces; and points out the new approaches the strategic management researchers should explore.

Originality/value

The paper challenges the mainstream of SMR by identifying the shortcomings, dilemmas, and challenges of the current SMR, and then highlights new ways to make breakthrough in SMR. The study will make strategic management scholars rethink their research and do meaningful research from the perspectives of theoretical contribution and practical guidance.

Details

Nankai Business Review International, vol. 6 no. 4
Type: Research Article
ISSN: 2040-8749

Keywords

Article
Publication date: 1 March 2005

Giovanni Mascali and Vittorio Romano

On the basis of the maximum entropy principle, seeks to formulate a hydrodynamical model for electron transport in GaAs semiconductors, which is free of any fitting parameter.

Abstract

Purpose

On the basis of the maximum entropy principle, seeks to formulate a hydrodynamical model for electron transport in GaAs semiconductors, which is free of any fitting parameter.

Design/methodology/approach

The model considers the conduction band to be described by the Kane dispersion relation and includes both Γ and L valleys. Takes into account electron‐non‐polar optical phonon, electron‐polar optical phonon and electro‐acoustic phonon scattering.

Findings

The set of balance equation of the model forms a quasilinear hyperbolic system and for its numerical integration a recent high‐order shock‐capturing central differencing scheme has been employed.

Originality/value

Presents the results of simulations of n+ ‐nn+ GaAs diode and Gunn oscillator.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 24 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

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