Search results

1 – 10 of 836
Per page
102050
Citations:
Loading...
Access Restricted. View access options
Article
Publication date: 27 November 2007

Richard Pitwon, Ken Hopkins and Dave Milward

To present work and characterisation results from a project to develop a pluggable optical connector for board to board interconnect.

251

Abstract

Purpose

To present work and characterisation results from a project to develop a pluggable optical connector for board to board interconnect.

Design/methodology/approach

An optical backplane connection system is described, which allows for repeatable docking and undocking of an active optical interface housed on a daughtercard to waveguides fabricated on an optical backplane.

Findings

The optical backplane connection system described has demonstrated its successful implementation with respect to optical data transfer across multimode polymer waveguides. Measurement results presented show that such a system is a viable approach toward the application of pluggable optical backplane interconnects.

Research limitations/implications

The direct connection to the exposed waveguide interface results in considerable optical loss and scattering. Future designs will have to address this. Additional work should also be undertaken to develop a means of connector engagement that is autonomous and requires no user intervention.

Originality/value

Prior research into the problem of coupling to an optical backplane has been concerned with interfaces that deflect optical signals by 90° into and out of the waveguides. Here, an alternative approach is proposed that launches light directly into the waveguide ends.

Details

Circuit World, vol. 33 no. 4
Type: Research Article
ISSN: 0305-6120

Keywords

Access Restricted. View access options
Article
Publication date: 23 November 2010

Richard C.A. Pitwon, Ken Hopkins, Dave Milward, Malcolm Muggeridge, David R. Selviah and Kai Wang

The purpose of this paper is to present the latest results from research and development into future optical printed circuit board (OPCB) interconnects and low‐cost assembly…

348

Abstract

Purpose

The purpose of this paper is to present the latest results from research and development into future optical printed circuit board (OPCB) interconnects and low‐cost assembly methods.

Design/methodology/approach

A novel method of high‐precision passive alignment and assembly to OPCBs was invented and a full evaluation platform developed to demonstrate the viability of this technique.

Findings

The technique was successfully deployed to passively align and assemble a lens receptacle onto an embedded polymer waveguide array in an electro‐OPCB. The lens receptacle formed a critical part of a dual lens pluggable in‐plane connection interface between peripheral optical devices and an OPCB. A lateral in‐plane mechanical accuracy of ±2 μm has been measured using this technique.

Research limitations/implications

As this is a free space optical coupling process, surface scattering at the exposed waveguide end facet was significant.

Originality/value

This paper details a novel method of passively assembling arbitrary optical devices onto multi‐mode optical waveguides and outlines the procedure and equipment required. A lens coupling solution is also presented which reduces susceptibility of a connecting optical interface to contamination.

Details

Circuit World, vol. 36 no. 4
Type: Research Article
ISSN: 0305-6120

Keywords

Access Restricted. View access options

Abstract

Purpose

The purpose of this paper is to provide an overview of the research in a project aimed at developing manufacturing techniques for integrated optical and electronic interconnect printed circuit boards (OPCB) including the motivation for this research, the progress, the achievements and the interactions between the partners.

Design/methodology/approach

Several polymer waveguide fabrication methods were developed including direct laser write, laser ablation and inkjet printing. Polymer formulations were developed to suit the fabrication methods. Computer‐aided design (CAD) tools were developed and waveguide layout design rules were established. The CAD tools were used to lay out a complex backplane interconnect pattern to meet practical demanding specifications for use in a system demonstrator.

Findings

Novel polymer formulations for polyacrylate enable faster writing times for laser direct write fabrication. Control of the fabrication parameters enables inkjet printing of polysiloxane waveguides. Several different laser systems can be used to form waveguide structures by ablation. Establishment of waveguide layout design rules from experimental measurements and modelling enables successful first time layout of complex interconnection patterns.

Research limitations/implications

The complexity and length of the waveguides in a complex backplane interconnect, beyond that achieved in this paper, is limited by the bend loss and by the propagation loss partially caused by waveguide sidewall roughness, so further research in these areas would be beneficial to give a wider range of applicability.

Originality/value

The paper gives an overview of advances in polymer formulation, fabrication methods and CAD tools, for manufacturing of complex hybrid‐integrated OPCBs.

Details

Circuit World, vol. 36 no. 2
Type: Research Article
ISSN: 0305-6120

Keywords

Access Restricted. View access options
Article
Publication date: 1 April 1994

Gary M. Klein

Online catalogs from 67 libraries using NOTIS software were searched using Internet connections to determine the positional operators selected as the default keyword operator on…

49

Abstract

Online catalogs from 67 libraries using NOTIS software were searched using Internet connections to determine the positional operators selected as the default keyword operator on each catalog. The diverse results indicated that there is no standard default positional operator.

Details

Library Hi Tech, vol. 12 no. 4
Type: Research Article
ISSN: 0737-8831

Access Restricted. View access options
Article
Publication date: 1 November 2002

Mordecai Lee

This exploration of management history focuses on mass entertainment media to determine the history of the efficiency expert in popular culture. It reviews the history of the…

2635

Abstract

This exploration of management history focuses on mass entertainment media to determine the history of the efficiency expert in popular culture. It reviews the history of the image of the efficiency expert in film and on American‐produced television programs. The review shows that this profession is a universal and pervasive one, permanently embedded in our culture and catholic in background, occupation and workplace. It is generally a man’s job. The most significant historical trend is a sharp change from the efficiency expert as an amusing and relatively harmless character to a malevolent one who is to be feared. Although television has only existed for about half as long as motion pictures, the depiction of the efficiency expert on TV is similar to his movie image. This widely recognized profession needs no introduction to the viewer. He is a negative figure, often laughed at but never admired.

Details

Management Decision, vol. 40 no. 9
Type: Research Article
ISSN: 0025-1747

Keywords

Available. Content available
Article
Publication date: 29 March 2011

Brian E. Roberts

1109

Abstract

Details

International Journal of Educational Management, vol. 25 no. 3
Type: Research Article
ISSN: 0951-354X

Access Restricted. View access options
Article
Publication date: 1 January 1954

1. Documentation, library and book organizations (0) American Documentation Institute

76

Abstract

1. Documentation, library and book organizations (0) American Documentation Institute

Details

Aslib Proceedings, vol. 6 no. 1
Type: Research Article
ISSN: 0001-253X

Available. Open Access. Open Access
Article
Publication date: 9 October 2017

Kjeld Harald Aij and Maurits Teunissen

Emphasis on quality and reducing costs has led many health-care organizations to reconfigure their management, process, and quality control infrastructures. Many are lean, a…

19306

Abstract

Purpose

Emphasis on quality and reducing costs has led many health-care organizations to reconfigure their management, process, and quality control infrastructures. Many are lean, a management philosophy with roots in manufacturing industries that emphasizes elimination of waste. Successful lean implementation requires systemic change and strong leadership. Despite the importance of leadership to successful lean implementation, few researchers have probed the question of ideal leadership attributes to achieve lean thinking in health care. The purpose of this paper is to provide insight into applicable attributes for lean leaders in health care.

Design/methodology/approach

The authors systematically reviewed the literature on principles of leadership and, using Dombrowski and Mielke’s (2013) conceptual model of lean leadership, developed a parallel theoretical model for lean leadership in health care.

Findings

This work contributes to the development of a new framework for describing leadership attributes within lean management of health care.

Originality/value

The summary of attributes can provide a model for health-care leaders to apply lean in their organizations.

Details

Journal of Health Organization and Management, vol. 31 no. 7/8
Type: Research Article
ISSN: 1477-7266

Keywords

Access Restricted. View access options
Article
Publication date: 1 January 1954

Aarhus Kommunes Biblioteker (Teknisk Bibliotek), Ingerslevs Plads 7, Aarhus, Denmark. Representative: V. NEDERGAARD PEDERSEN (Librarian).

120

Abstract

Aarhus Kommunes Biblioteker (Teknisk Bibliotek), Ingerslevs Plads 7, Aarhus, Denmark. Representative: V. NEDERGAARD PEDERSEN (Librarian).

Details

Aslib Proceedings, vol. 6 no. 1
Type: Research Article
ISSN: 0001-253X

Access Restricted. View access options
Article
Publication date: 9 October 2017

Shawne D. Miksa

The purpose of this paper is to present the initial relationship between the Classification Research Group (CRG) and the Center for Documentation and Communication Research (CDCR…

1019

Abstract

Purpose

The purpose of this paper is to present the initial relationship between the Classification Research Group (CRG) and the Center for Documentation and Communication Research (CDCR) and how this relationship changed between 1952 and 1970. The theory of normative behavior and its concepts of worldviews, social norms, social types, and information behavior are used to characterize the relationship between the small worlds of the two groups with the intent of understanding the gap between early classification research and information retrieval (IR) research.

Design/methodology/approach

This is a mixed method analysis of two groups as evidenced in published artifacts by and about their work. A thorough review of historical literature about the groups as well as their own published works was employed and an author co-citation analysis was used to characterize the conceptual similarities and differences of the two groups of researchers.

Findings

The CRG focused on fundamental principles to aid classification and retrieval of information. The CDCR were more inclined to develop practical methods of retrieval without benefit of good theoretical foundations. The CRG began it work under the contention that the general classification schemes at the time were inadequate for the developing IR mechanisms. The CDCR rejected the classification schemes of the times and focused on developing punch card mechanisms and processes that were generously funded by both government and corporate funding.

Originality/value

This paper provides a unique historical analysis of two groups of influential researchers in the field of library and information science.

1 – 10 of 836
Per page
102050