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Article
Publication date: 11 January 2011

C. Wang, P. Yan, S. Wang, X. Bai, J. Yuan, E. Yan and Z. Huang

The purpose of this paper is to investigate the preparation process and the photoluminescent properties of poly‐(phenylene vinylene) (PPV)/polyvinyl alcohol (PVA)/Ag2S

Abstract

Purpose

The purpose of this paper is to investigate the preparation process and the photoluminescent properties of poly‐(phenylene vinylene) (PPV)/polyvinyl alcohol (PVA)/Ag2S composite nanofibres.

Design/methodology/approach

A simple method coupling electrospinning technology and in situ self‐assembly was used to prepare PPV/PVA/Ag2S nanofibres from the solution containing precursory PPV, PVA and silver nitrate (AgNO3). The photoluminescent properties of the PPV/PVA/Ag2S composite nanofibres were characterised by fluorescence microscopy and eclipse fluorescence spectrophotometer.

Findings

The Ag2S nanoparticles were well dispersed in the PPV/PVA/Ag2S composite nanofibres, and their dimension was in the range of 10‐40 nm. Excessive doping of Ag2S nanoparticles will lead to rough and uneven fibres' surface.

Research limitations/implications

The size of Ag2S nanoparticles in the fibres was not uniform enough and the orientation of composite nanofibres was hardly controlled.

Practical implications

The coupling of electrospinning technology and in situ self‐assembly opened a new gate for preparing other nanoparticles doped composite nanofibres.

Originality/value

The in situ growing of Ag2S nanoparticles in PPV nanofibre improved the excellent properties of composite nanofibres. The morphology of composite nanofibres can be efficaciously controlled via adjusting the ratio between AgNO3 and polymer. The obtained PPV/PVA/Ag2S composite nanofibres will have potential applications in nano‐optoelectronic devices.

Details

Pigment & Resin Technology, vol. 40 no. 1
Type: Research Article
ISSN: 0369-9420

Keywords

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Article
Publication date: 19 September 2008

Andrew M. Cox

The “photosharing” site Flickr is one of the most commonly cited examples used to define Web2.0. This paper aims to explore where Flickr's real novelty lies, examining its…

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7106

Abstract

Purpose

The “photosharing” site Flickr is one of the most commonly cited examples used to define Web2.0. This paper aims to explore where Flickr's real novelty lies, examining its functionality and its place in the world of amateur photography. Several optimistic views of the impact of Flickr such as its facilitation of citizen journalism, “vernacular creativity” and in learning as an “affinity space” are evaluated.

Design/methodology/approach

The paper draws on a wide range of sources including published interviews with its developers, user opinions expressed in forums, telephone interviews and content analysis of user profiles and activity.

Findings

Flickr's development path passes from an innovative social game to a relatively familiar model of a web site, itself developed through intense user participation but later stabilising with the reassertion of a commercial relationship to the membership. The broader context of the impact of Flickr is examined by looking at the institutions of amateur photography and particularly the code of pictorialism promoted by the clubs and industry during the twentieth century. The nature of Flickr as a benign space is premised on the way the democratic potential of photography is controlled by such institutions. The limits of optimistic claims about Flickr are identified in the way that the system is designed to satisfy commercial purposes, continuing digital divides in access and the low interactivity and criticality on Flickr.

Originality/value

Flickr is an interesting source of change, but can only be understood in the perspective of long‐term development of the hobby and wider social processes. By setting Flickr in such a broad context, its significance and that of Web2.0 more generally can be fully assessed.

Details

Aslib Proceedings, vol. 60 no. 5
Type: Research Article
ISSN: 0001-253X

Keywords

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Article
Publication date: 1 June 1985

The librarian and researcher have to be able to uncover specific articles in their areas of interest. This Bibliography is designed to help. Volume IV, like Volume III…

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10638

Abstract

The librarian and researcher have to be able to uncover specific articles in their areas of interest. This Bibliography is designed to help. Volume IV, like Volume III, contains features to help the reader to retrieve relevant literature from MCB University Press' considerable output. Each entry within has been indexed according to author(s) and the Fifth Edition of the SCIMP/SCAMP Thesaurus. The latter thus provides a full subject index to facilitate rapid retrieval. Each article or book is assigned its own unique number and this is used in both the subject and author index. This Volume indexes 29 journals indicating the depth, coverage and expansion of MCB's portfolio.

Details

Management Decision, vol. 23 no. 6
Type: Research Article
ISSN: 0025-1747

Keywords

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Article
Publication date: 16 October 2017

Margaret M. Cullen and Niamh M. Brennan

Boards of directors are assumed to exercise three key accountability roles – control, monitoring and oversight roles. By researching one board type – investment fund…

Abstract

Purpose

Boards of directors are assumed to exercise three key accountability roles – control, monitoring and oversight roles. By researching one board type – investment fund boards – and the power relations around those boards, the purpose of this paper is to show that such boards are not capable of operating the three key roles assumed of them.

Design/methodology/approach

The authors conducted 25 in-depth interviews and a focus group session with investment fund directors applying a grounded theory methodology.

Findings

Because of their unique position of power, the authors find that fund promoter organisations (that establish and attract investors to the funds) exercise control and monitoring roles. As a result, contrary to prior assumptions, oversight is the primary role of investment fund boards, rather than the control role or monitoring role associated with corporate boards. The findings can be extended to other board-of-director contexts in which boards (e.g. subsidiary boards, boards of state-owned entities) have legal responsibility but limited power because of power exercised by other parties such as large shareholders.

Practical implications

Shareholders and regulators generally assume boards exercise control and monitoring roles. This can lead to an expectations gap on the part of shareholders and regulators who may not consider the practical realities in which boards operate. This expectations gap compromises the very objective of governance – investor protection.

Originality/value

Based on interviews with investment fund directors, the authors challenge the control-role theory of investment fund boards of directors. Building on our findings, and following subsequent conceptual engagement with the literature, the authors differentiate control, monitoring and oversight roles, terms which are often used interchangeably in prior research. The authors distinguish between the three terms on the basis of the level of influence implied by each.

Details

Accounting, Auditing & Accountability Journal, vol. 30 no. 8
Type: Research Article
ISSN: 0951-3574

Keywords

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Article
Publication date: 19 September 2016

Ziqiang Cui, Qi Wang, Qian Xue, Wenru Fan, Lingling Zhang, Zhang Cao, Benyuan Sun, Huaxiang Wang and Wuqiang Yang

Electrical capacitance tomography (ECT) and electrical resistance tomography (ERT) are promising techniques for multiphase flow measurement due to their high speed, low…

Abstract

Purpose

Electrical capacitance tomography (ECT) and electrical resistance tomography (ERT) are promising techniques for multiphase flow measurement due to their high speed, low cost, non-invasive and visualization features. There are two major difficulties in image reconstruction for ECT and ERT: the “soft-field”effect, and the ill-posedness of the inverse problem, which includes two problems: under-determined problem and the solution is not stable, i.e. is very sensitive to measurement errors and noise. This paper aims to summarize and evaluate various reconstruction algorithms which have been studied and developed in the word for many years and to provide reference for further research and application.

Design/methodology/approach

In the past 10 years, various image reconstruction algorithms have been developed to deal with these problems, including in the field of industrial multi-phase flow measurement and biological medical diagnosis.

Findings

This paper reviews existing image reconstruction algorithms and the new algorithms proposed by the authors for electrical capacitance tomography and electrical resistance tomography in multi-phase flow measurement and biological medical diagnosis.

Originality/value

The authors systematically summarize and evaluate various reconstruction algorithms which have been studied and developed in the word for many years and to provide valuable reference for practical applications.

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Article
Publication date: 6 February 2017

S. Abbasbandy, Elyas Shivanian, K. Vajravelu and Sunil Kumar

The purpose of this paper is to present a new approximate analytical procedure to obtain dual solutions of nonlinear differential equations arising in mixed convection…

Abstract

Purpose

The purpose of this paper is to present a new approximate analytical procedure to obtain dual solutions of nonlinear differential equations arising in mixed convection flow in a semi-infinite domain. This method, which is based on Padé-approximation and homotopy–Padé technique, is applied to a model of magnetohydrodynamic Falkner–Skan flow as well. These examples indicate that the method can be successfully applied to solve nonlinear differential equations arising in science and engineering.

Design/methodology/approach

Homotopy–Padé method.

Findings

The main focus of the paper is on the prediction of the multiplicity of the solutions, however we have calculated multiple (dual) solutions of the model problem namely, mixed convection heat transfer in a porous medium.

Research limitations/implications

The authors conjecture here that the combination of traditional–Pade and Hankel–Pade generates a useful procedure to predict multiple solutions and to calculate prescribed parameter with acceptable accuracy as well. Validation of this conjecture for other further examples is a challenging research opportunity.

Social implications

Dual solutions of nonlinear differential equations arising in mixed convection flow in a semi-infinite domain.

Originality/value

In this study, the authors are using two modified methods.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 27 no. 2
Type: Research Article
ISSN: 0961-5539

Keywords

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Article
Publication date: 2 July 2020

Laura Almeida, Vivian W.Y. Tam, Khoa N. Le and Yujuan She

Occupants are one of the most impacting factors in the overall energy performance of buildings, according to literature. Occupants’ behaviours and actions may impact the…

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255

Abstract

Purpose

Occupants are one of the most impacting factors in the overall energy performance of buildings, according to literature. Occupants’ behaviours and actions may impact the overall use of energy in more than 50%. In order to quantify the impact that occupant behaviour has in the use of energy, this study simulated interactions between occupants and the systems present in two actual buildings. The main aim was to compare the deviations due to occupant behaviour with the actual conditions and energy use of the two buildings.

Design/methodology/approach

The buildings used as a case study in this research were green buildings, rated according to the Australian Green Star certification system as a 6-star and a non-rated building. The two buildings are university buildings with similar characteristics, from Western Sydney University, in Sydney, Australia. A comparison was performed by means of building simulations among the use of energy in both buildings, aiming to understand if the green rating had any impact on the energy related to occupant behaviour. Therefore, to represent the actual buildings' conditions, the actual data related with climate, geometry, systems, internal loads, etc. were used as input variables in the simulation models of the green and the non-rated buildings. Both models were calibrated and validated, having as target the actual monitored use of electricity.

Findings

Occupants were categorized according to their levels of energy use as follows: saving, real and intensive energy users. Building simulations were performed to each building, with varying parameters related with lighting, plug loads, windows/doors opening, shading and air conditioning set points. Results show that occupant behaviour may impact the buildings' energy performance in a range of 72% between the two extremes. There is no significant relationship between the green rating and the way occupants behave in terms of the energy use.

Originality/value

This study intends to show the impact of different categories of occupant behaviour in the overall energy performance of two university buildings, a non-rated and a green-rated building, having as reference an actual representation of the buildings. Additionally, the study aims to understand the main differences between a green-rated and a non-rated building when accounting with the previous categories.

Details

Engineering, Construction and Architectural Management, vol. 27 no. 8
Type: Research Article
ISSN: 0969-9988

Keywords

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Article
Publication date: 6 September 2018

Zhen Hong, C.K.M. Lee and Linda Zhang

The purpose of this paper is twofold, first providing researchers with an overview about the uncertainties occurred in procurement including applicable approaches for…

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3130

Abstract

Purpose

The purpose of this paper is twofold, first providing researchers with an overview about the uncertainties occurred in procurement including applicable approaches for analyzing different uncertain scenarios, and second proposing directions to inspire future research by identifying research gaps.

Design/methodology/approach

Papers related to supply chain risk management and procurement risk management (PRM) from 1995–2017 in several major databases are extracted by keywords and then further filtered based on the relevance to the topic, number of citations and publication year. A total of over 156 papers are selected. Definitions and current approaches related to procurement risks management are reviewed.

Findings

Five main risks in procurement process are identified. Apart from summarizing current strategies, suggestions are provided to facilitate strategy selection to handle procurement risks. Seven major future challenges and implications related PRM and different uncertainties are also indicated in this paper.

Research limitations/implications

Procurement decisions making under uncertainty has attracted considerable attention from researchers and practitioners. Despite the increasing awareness for risk management for supply chain, no detail and holistic review paper studied on procurement uncertainty. Managing procurement risk not only need to mitigate the risk of price and lead time, but also need to have sophisticated analysis techniques in supply and demand uncertainty.

Originality/value

The contribution of this review paper is to discuss the implications of the research findings and provides insight about future research. A novel research framework is introduced as reference guide for researchers to apply innovative approach of operations research to resolve the procurements uncertainty problems.

Details

Industrial Management & Data Systems, vol. 118 no. 7
Type: Research Article
ISSN: 0263-5577

Keywords

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Article
Publication date: 17 May 2013

Andreas Wieland and Carl Marcus Wallenburg

The purpose of this research is to explore the resilience domain, which is important in the field of supply chain management; it investigates the effects relational…

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8697

Abstract

Purpose

The purpose of this research is to explore the resilience domain, which is important in the field of supply chain management; it investigates the effects relational competencies have for resilience and the effect resilience, in turn, has on a supply chain ' s customer value.

Design/methodology/approach

The research is empirical in nature and employs a confirmatory approach that builds on the relational view as a primary theoretical foundation. It utilizes survey data collected from manufacturing firms from three countries, which is analyzed using structural equation modeling.

Findings

It is found that communicative and cooperative relationships have a positive effect on resilience, while integration does not have a significant effect. It is also found that improved resilience, obtained by investing in agility and robustness, enhances a supply chain ' s customer value.

Practical implications

Some findings contrast the expectations derived from theory. Particularly, practitioners can learn that integration has a limited role in enhancing resilience.

Originality/value

The study distinguishes between a proactive and reactive dimension of resilience: robustness and agility. The relational view serves as the theoretical basis to explain the effects between three types of relational competencies (communication, cooperation, and integration) and the above-mentioned two dimensions of resilience.

Details

International Journal of Physical Distribution & Logistics Management, vol. 43 no. 4
Type: Research Article
ISSN: 0960-0035

Keywords

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Article
Publication date: 1 January 1984

H. Paul and P.S. Yan

This article presents some discussions on the role of production engineers in quality and reliability planning and control in the context of the manufacturing sector in…

Abstract

This article presents some discussions on the role of production engineers in quality and reliability planning and control in the context of the manufacturing sector in Singapore. Superior productive efficiency in manufacturing can only be achieved through effective quality control and reliability planning. To be able to compete with other and more advanced countries, Singapore has to emphasise modern manufacturing methods, like automated, computer‐integrated and flexible manufacturing systems. Therefore, concerted efforts are now being taken to train adequately skilled and professional manpower to operate and manage such manufacturing systems. The role of production engineers in operating and managing the modern manufacturing systems has thus become more important and demanding.

Details

International Journal of Quality & Reliability Management, vol. 1 no. 1
Type: Research Article
ISSN: 0265-671X

1 – 10 of over 8000