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Article
Publication date: 5 February 2018

Hsi-Yin Yeh, Chi-Wei Lo, Kai-Shing Chang and Ssu-Han Chen

This study aims to propose a visualized model of hot technology evolution to describe its development.

Abstract

Purpose

This study aims to propose a visualized model of hot technology evolution to describe its development.

Design/methodology/approach

The basic concept is to divide a technological field into a timeline consisting of several patent clusters. Hot technology trajectories are then explored using their continuity, as well as the point in time at which they occur.

Findings

Patents in orthopaedics between 1999 and 2014 have been chosen as the research subjects and the field is divided into several hot technology trajectories. A further step is taken by interpreting high-frequency key terms. Three categories – spine-related materials, bone repairing materials and bone plates – have been identified.

Practical implications

The trajectories presented by evolving diagrams allow readers to understand the evolution of hot technology and help analysts to plan layout and strategies to remain competitive.

Originality/value

Patent clusters reflect the knowledge context of technology development. Previous studies have focused on only new technology evolution and have rarely explored the knowledge context of hot patents that have been frequently cited in recent years. Such patents often guide the development of technology.

Details

The Electronic Library, vol. 36 no. 1
Type: Research Article
ISSN: 0264-0473

Keywords

Article
Publication date: 3 July 2017

Jeng-Tzong Chen, Shyh-Rong Kuo, Yu-Lung Chang and Shing-Kai Kao

The purpose of this paper is to detect the degenerate scale of a 2D bending plate analytically and numerically.

Abstract

Purpose

The purpose of this paper is to detect the degenerate scale of a 2D bending plate analytically and numerically.

Design/methodology/approach

To avoid the time-consuming scheme, the influence matrix of the boundary element method (BEM) is reformulated to an eigenproblem of the 4 by 4 matrix by using the scaling transform instead of the direct-searching scheme to find degenerate scales. Analytical degenerate scales are derived from the boundary integral equation (BIE) by using the degenerate kernel only for the circular case. Numerical results of the direct-searching scheme and the eigen system for the arbitrary shape are also considered.

Findings

Results using three methods, namely, analytical derivation, the direct-searching scheme and the 4 by 4 eigen system, are also given for the circular case and arbitrary shapes. Finally, addition of a constant for the kernel function makes original eigenvalues (2 real roots and 2 complex roots) of the 4 by 4 matrix to be all real. This indicates that a degenerate scale depends on the kernel function.

Originality/value

The analytical derivation for the degenerate scale of a 2D bending plate in the BIE is first studied by using the degenerate kernel. Through the reformed eigenproblem of a 4 by 4 matrix, the numerical solution for the plate of an arbitrary shape can be used in the plate analysis using the BEM.

Details

Engineering Computations, vol. 34 no. 5
Type: Research Article
ISSN: 0264-4401

Keywords

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