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Article
Publication date: 1 April 1996

ALEXANDER M. ROBERTSON and PETER WILLETT

This paper describes the development of a genetic algorithm (GA) for the assignment of weights to query terms in a ranked‐output document retrieval system. The GA involves…

Abstract

This paper describes the development of a genetic algorithm (GA) for the assignment of weights to query terms in a ranked‐output document retrieval system. The GA involves a fitness function that is based on full relevance information, and the rankings resulting from the use of these weights are compared with the Robertson‐Sparck Jones F4 retrospective relevance weight. Extended experiments with seven document test collections show that the ga can often find weights that are slightly superior to those produced by the deterministic weighting scheme. That said, there are many cases where the two approaches give the same results, and a few cases where the F4 weights are superior to the ga weights. Since the ga has been designed to identify weights yielding the best possible level of retrospective performance, these results indicate that the F4 weights provide an excellent and practicable alternative. Evidence is presented to suggest that negative weights may play an important role in retrospective relevance weighting.

Details

Journal of Documentation, vol. 52 no. 4
Type: Research Article
ISSN: 0022-0418

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Article
Publication date: 11 January 2013

Yang Dang‐guo, Sun Yan, Zhang Zheng‐yu, Wang Chao and Zhu Wei‐jun

The purpose of this paper is to present a novel method to design and manufacture rapid prototyping (RP) lightweight photopolymer‐resin models for wind‐tunnel tests. This…

Abstract

Purpose

The purpose of this paper is to present a novel method to design and manufacture rapid prototyping (RP) lightweight photopolymer‐resin models for wind‐tunnel tests. This method can ensure the structural configuration similarity considering model deformation under aerodynamic loads.

Design/methodology/approach

Photopolymer‐resin based on RP technique was used to fabricate DLR‐F4 models. Testing in a subsonic and transonic wind tunnel was carried out and the test results were compared to analyze performance predictions.

Findings

RP photopolymer‐resin wind‐tunnel models fabricated by the design methods yielded satisfactory aerodynamic performance. The methods can decrease the model's weight and prevent resonance occurrence among the models, wind‐tunnel, and support system, shorten the processing period, and lead to decrease in manufacturing period and cost.

Research limitations/implications

Stiffness shortage of the thin components, such as wing tip, often leads to deformation occurrence under aerodynamic loads in transonic wind‐tunnel tests, which has significant influence on aerodynamic characteristics of the test models. Therefore, model deformation should be taken into account in the design process.

Originality/value

This design and manufacture method, aerodynamic and structural combination design and structural optimization, can obtain RP lightweight photopolymer‐resin wind‐tunnel models for satisfactory aerodynamic performance, which makes RP techniques more practical for manufacturing transonic wind‐tunnel test models, considering deformation induced by aerodynamic forces such as lift force. The methods also present an inexpensive way to test and evaluate preliminary aircraft designs, in both academia and industry.

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Article
Publication date: 27 July 2018

Evangelia Triperina, Georgios Bardis, Cleo Sgouropoulou, Ioannis Xydas, Olivier Terraz and Georgios Miaoulis

The purpose of this paper is to introduce a novel framework for visual-aided ontology-based multidimensional ranking and to demonstrate a case study in the academic domain.

Abstract

Purpose

The purpose of this paper is to introduce a novel framework for visual-aided ontology-based multidimensional ranking and to demonstrate a case study in the academic domain.

Design/methodology/approach

The paper presents a method for adapting semantic web technologies on multiple criteria decision-making algorithms to endow to them dynamic characteristics. It also showcases the enhancement of the decision-making process by visual analytics.

Findings

The semantic enhanced ranking method enables the reproducibility and transparency of ranking results, while the visual representation of this information further benefits decision makers into making well-informed and insightful deductions about the problem.

Research limitations/implications

This approach is suitable for application domains that are ranked on the basis of multiple criteria.

Originality/value

The discussed approach provides a dynamic ranking methodology, instead of focusing only on one application field, or one multiple criteria decision-making method. It proposes a framework that allows integration of multidimensional, domain-specific information and produces complex ranking results in both textual and visual form.

Details

Data Technologies and Applications, vol. 52 no. 3
Type: Research Article
ISSN: 2514-9288

Keywords

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Article
Publication date: 5 February 2018

Knut Boge, AlenkaTemeljotov Salaj, Svein Bjørberg and Anne Kathrine Larssen

The purpose of this paper is to know how do early-phase planning of real estate (RE) and facilities management (FM) create value for owners and users of commercial and…

Abstract

Purpose

The purpose of this paper is to know how do early-phase planning of real estate (RE) and facilities management (FM) create value for owners and users of commercial and public sector buildings.

Design/methodology/approach

The data were collected in Norway in 2015 through a national online survey (N = 837). The sample gives a good picture of Norwegian owners’ and even users on tactical-level (customer) perspectives on RE and FM. The data have been analysed through descriptive statistics and exploratory factor analysis. The hypotheses have been tested through analyses of correlations and ordinary least square (OLS) linear regressions.

Findings

Exploratory factor analysis made it possible to establish seven composite variables (constructs). Based on these seven constructs, six hypotheses were derived and tested. Obstacles and financials have no significant effect on buildings’ perceived usability. The most important factors during early-phase planning that influence buildings’ perceived usability and lifetime value creation are measures promoting environment and life-cycle costs (LCC), FM, adaptability and image.

Research limitations/implications

Further empirical and preferably, comparative studies are needed to establish whether the findings can be generalized. The study has shown that a building’s usability and lifetime value creation is largely determined by decisions made during early phase planning.

Practical implications

Well-founded early-phase planning of RE and FM may actually provide very high return on the investments and significantly improve the buildings’ lifetime value creation for owners and users. Early-phase planning is also of great importance both for buildings’ physical design, as well as for successful FM during the buildings’ use phase, and may prevent irreversible blunders.

Originality/value

This is a large N empirical study in Norway. The findings indicate what owner and users of buildings should emphasize during early phase planning.

Details

Facilities, vol. 36 no. 1/2
Type: Research Article
ISSN: 0263-2772

Keywords

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Abstract

Details

Review of Marketing Research
Type: Book
ISBN: 978-0-85724-727-8

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Article
Publication date: 31 July 2018

Shubhangini Rajput and Surya Prakash Singh

The purpose of this paper is to identify, analyze and model Internet of Things (IoT) enablers essential for the success of Industry 4.0.

Abstract

Purpose

The purpose of this paper is to identify, analyze and model Internet of Things (IoT) enablers essential for the success of Industry 4.0.

Design/methodology/approach

IoT enablers for Industry 4.0 are identified from literature and inferable discussions with industry experts. Three different techniques namely, principal component analysis (PCA), interpretive structural modeling (ISM) and decision making trial and evaluation laboratory (DEMATEL) are applied to model IoT enablers. In addition to this, DEMATEL is also applied under two different situations representing the behavioral characteristic of experts involved. These are termed as optimistic (maximum) and pessimistic (minimum).

Findings

The integrated approach of PCA-ISM-DEMATEL shows that IoT ecosystem and IoT Big Data are the most influential or driving IoT enablers. These two enablers have been identified as the pillars for Industry 4.0. On the other side, IoT interchangeability, consumer IoT, IoT robustness and IoT interface and network capability have also been identified as the most dependent enablers for Industry 4.0.

Practical implications

The findings enable the industry practitioners to select the most appropriate driving enablers for an effective implementation of Industry 4.0.

Originality/value

The integrated approach-based hierarchical model and cause-effect relationship among IoT enablers are proposed which is a novel initiative for Industry 4.0. Moreover, two different variants of DEMATEL namely, pessimistic and optimistic are applied first time.

Details

Management Decision, vol. 57 no. 8
Type: Research Article
ISSN: 0025-1747

Keywords

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Article
Publication date: 1 August 1993

George P. Artikis

Aims to identify factors which affect the location decisions ofcompanies in the Greek metal industry. Attempts to determine what thesefactors are, how important they are…

Abstract

Aims to identify factors which affect the location decisions of companies in the Greek metal industry. Attempts to determine what these factors are, how important they are relative to each other and how important taxes and inducements (financial factor) are in the process of location decision making. The methodology employs: a point allocation system to evaluate the relative importance of the various location factors, experts′ opinion and mail questionnaire for data collection, experience in undertaking new investment for drawing the sample firms, a prospective approach, and non‐parametric statistics. The results are: 16 factors are identified; labour is the first, and financial factor is the second in importance; and the difference in importance between financial factor and other remaining factors is not statistically significant. Concludes that, given the evidence there would be nothing to lose and everything to gain from a much more critical approach to the use of the financial factor as an instrument of regional policy.

Details

International Journal of Operations & Production Management, vol. 13 no. 8
Type: Research Article
ISSN: 0144-3577

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Article
Publication date: 1 May 1991

George P. Artikis

Attempts by Greek governments to attract manufacturing industry toproblem regions have been shaped by a large number of development laws.Location policy works principally…

Abstract

Attempts by Greek governments to attract manufacturing industry to problem regions have been shaped by a large number of development laws. Location policy works principally by influencing the decisions of individual firms. The article examines the relevance of Greek government location policy and the local criteria actually used by firms operating in the food industry. Raw materials were the most important determinant and the results otherwise suggest that the use of financial factors as an instrument of regional policy needs re‐examination.

Details

International Journal of Operations & Production Management, vol. 11 no. 5
Type: Research Article
ISSN: 0144-3577

Keywords

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Article
Publication date: 26 June 2020

Emeka Smart Oruh and Chianu Dibia

This paper explores the link between employee stress and the high-power distance (HPD) culture in Nigeria. The study context is the banking and manufacturing sectors in…

Abstract

Purpose

This paper explores the link between employee stress and the high-power distance (HPD) culture in Nigeria. The study context is the banking and manufacturing sectors in Nigeria, which have a history of exploitation, unconducive work environments to productivity, work-life imbalance, work overload, burnout and employee stress.

Design/methodology/approach

Using a qualitative, interpretive methodology, this article adopts a thematic analysis of data drawn from semi-structured interviews with 24 managerial and non-managerial workers to explore the process by which Nigerian manufacturing and banking sectors' work (mal)practices go unchallenged, thereby triggering and exacerbating employees' stress levels.

Findings

The study found that the high power distance culture promotes a servant-master relationship type, making it impossible for employees to challenge employers on issues relating to stressors such as work overload, unconducive work environments, work-life imbalance and burnout, thereby exacerbating their stress levels in a country in which stress has become a way of life.

Research limitations/implications

Research on the relationship between employee stress and HPD culture is relatively underdeveloped. This article sheds light on issues associated with stressors in Nigeria's human resource management (HRM) and employment relations practices. The link between the inability of employees to challenge these stressors (which are consequences of an HPD culture) and increased employee stress has substantial implications for employment and work-related policies and practices in general. The study is constrained by the limited sample size, which inhibits the generalisation of its findings.

Originality/value

The article adds to the scarcity of studies underscoring the relationship between high-power distance and the inability of employees to challenge work-related stressors as a predictor of employee stress and a mediator between workplace practices and employee stress, particularly in the emerging economies.

Details

Employee Relations: The International Journal, vol. 42 no. 6
Type: Research Article
ISSN: 0142-5455

Keywords

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Article
Publication date: 6 December 2018

Knut Boge, Alenka Temeljorov Salaj, Ida Bakken, Magnus Granli and Silje Mandrup

The purpose of this paper is to investigate factors that influence effective workplace designs for knowledge workers.

Abstract

Purpose

The purpose of this paper is to investigate factors that influence effective workplace designs for knowledge workers.

Design/methodology/approach

During spring 2016, the employees in a large institution for research and higher education, a large consultancy company and a medium-sized consultancy company (in total 4367 employees) in Norway received invitations to participate in an anonymous online survey about workplaces and facilities. In all, 1,670 employees answered the survey (38.2 per cent response rate). The data have been analyzed with IBM SPSS version 23, among others through use of exploratory factor analysis and two-way ANOVA.

Findings

Most respondents at the institution for research and higher education have cell offices. Most respondents in the two consultancy companies have open and flexible offices. This paper indicate the respondents’ preferences or perception of their workstation and the workplace’s fit for their tasks is affected both by the respondents’ type of office and how much time they spend at their workstation during the week. There are also possible age or generation effects.

Research limitations/implications

One methodical weakness in the present paper is that two-way ANOVA has been applied on survey data. Experiments are usually arranged to provide almost equal numbers of observations in each category. This is usually not possible with survey data. However, despite this weakness, the present paper provides several findings that challenge some of the workplace research’s taken for givens.

Practical implications

The present paper indicates that facility managers and others responsible for office and workplace design are advised to take the employees’ tasks and work patterns into consideration when designing workplaces and providing offices and workstations to their end-users. The present paper also indicates that employees require different kinds of support facilities and services depending on what kind of offices and workplaces they have.

Originality/value

This is a large N empirical study among knowledge workers in three organizations, one public administration and two private enterprises. The present paper indicate that provision of offices and workstations with supporting facilities should be differentiated according to the end-users’ work tasks and work patterns.

Details

Facilities, vol. 37 no. 1/2
Type: Research Article
ISSN: 0263-2772

Keywords

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