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Article

Alagappan K M, Vijayaraghavan S, Jenarthanan M P and Giridharan R

The purpose of this paper is to identify the ideal process parameters to be set for the drilling of hybrid fibre-reinforced polymer (FRP) (kenaf and banana) composite…

Abstract

Purpose

The purpose of this paper is to identify the ideal process parameters to be set for the drilling of hybrid fibre-reinforced polymer (FRP) (kenaf and banana) composite using High-Speed Steel drill bits (5, 10, 15 mm) coated with tungsten carbide by means of statistical reproduction of the delamination factor and machining force using Taguchi–Grey Relational Analysis.

Design/methodology/approach

The contemplated process parameters are Feed, Speed and Drill Diameter. The trials were carried out by taking advantage of the L-27 factorial design by Taguchi. Three factors, the three level Taguchi Orthogonal Array design in Grey Relational Analysis was used to carry out the trial study. Video Measuring System was used to identify the damage around the drill region. “Minitab 18” was used to examine the data collected by taking advantage of the various statistical and graphical tools available. Examination of variance is used to legitimize the model in identifying the most notable parameter.

Findings

The optimised set of input parameters were found out successfully which are as follows: Feed Rate: 450 mm/min, Cutting Speed: 3,000 rpm and Drill Diameter of 5 mm. When these values are fed in as input the optimised output is being obtained. From ANOVA analysis, it is apparent that the Speed (contribution of 92.6%) is the most influencing parameter on the delamination factor and machining force of the FRP material.

Originality/value

Optimization of process parameters on drilling of natural fibres reinforced in epoxy resin matrices using Taguchi–Grey Relational Analysis has not been previously explored.

Details

Multidiscipline Modeling in Materials and Structures, vol. 16 no. 5
Type: Research Article
ISSN: 1573-6105

Keywords

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Article

T.A.S. Vijayaraghavan

State road transport undertakings (SRTUs) in India presentlyoperate around 110,000 passenger buses with a total investment of aboutRs60 billion. Criticism of SRTUs has…

Abstract

State road transport undertakings (SRTUs) in India presently operate around 110,000 passenger buses with a total investment of about Rs60 billion. Criticism of SRTUs has become more transparent with the recent policy changes. One of the major criticisms is that they are, by and large, operations‐oriented rather than strategy‐oriented. Attempts to assess the present strategic position of the SRTUs through an elaborate SWOT analysis and to chalk out the strategic options for them in the present emerging environment of changing needs and attitudes. The diagnosis shows that the SRTUs in India are not really competing well in an industry which is becoming more and more unstable. Suggests competitive types of strategies emphasizing the importance of service marketing approach.

Details

International Journal of Public Sector Management, vol. 8 no. 1
Type: Research Article
ISSN: 0951-3558

Keywords

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Article

Mohamed Syazwan Ab Talib and Abu Bakar Abdul Hamid

The purpose of this strengths or weaknesses, and its external opportunities or threats (SWOT) analysis study on Halal logistics industry in Malaysia is to identify SWOT in…

Abstract

Purpose

The purpose of this strengths or weaknesses, and its external opportunities or threats (SWOT) analysis study on Halal logistics industry in Malaysia is to identify SWOT in the Halal logistics environment and to uncover strategies to leverage on the strengths and opportunities and rectifying the weaknesses as well as overcoming the threats.

Design/methodology/approach

This study comprises two methods: literature review and interviews. Extensive literature reviews were obtained from leading databases and the articles recorded matches or related with the keywords. In addition, the respondents from the interviews consist of middle- and top-level managers with reputable knowledge, expertise and experience in the Logistics and Halal industry. After the literature was reviewed and information was transcribed from the interviews, reduction techniques were used to group and summarize the variables into the four SWOT categories.

Findings

The SWOT categories, consisting of SWOT, are generated from the literature reviews and supported by the respondents’ views and vice versa. Examples of SWOT analyses done are as follows: strength (strong government support), weakness (inconsistent Halal definition), opportunity (Muslims’ population growth) and threat (no uniformity on Halal standards).

Research limitations/implications

The SWOT analysis done for this study only demonstrates the internal and external environments and not the assumption that they are certain to be correct, as they contain every imaginable matter in relation to Halal logistics. Plus, the analysis done does not show how to achieve competitive advantage, merely as a guideline and the SWOT analysis done may be outdated as the environments are constantly changing.

Practical implications

The study hopes to contribute in future studies and act as a guide for the Halal logistics players to have better understanding in their business environment.

Originality/value

This study is the first of its kind, to incorporate SWOT and Halal logistics. Hence, this study will add in more value to the existing academic research done on SWOT analysis and broadening the Halal and logistics business understanding, not only in Malaysia but globally as well.

Details

Journal of Islamic Marketing, vol. 5 no. 3
Type: Research Article
ISSN: 1759-0833

Keywords

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Article

Robert Blancquaert, Miloš Somora, M.S. Vijayaraghavan and D.J. Lowrie

ISHM‐Benelux has recently set up a permanent secretariat at the following address:

Abstract

ISHM‐Benelux has recently set up a permanent secretariat at the following address:

Details

Microelectronics International, vol. 9 no. 3
Type: Research Article
ISSN: 1356-5362

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Article

Jayaraman Kathirvelan and Rajagopalan Vijayaraghavan

This work encompasses the various laboratory-based and portable methods evolved in recent times for sensitive and selective detection of ethylene for fruit-ripening…

Abstract

Purpose

This work encompasses the various laboratory-based and portable methods evolved in recent times for sensitive and selective detection of ethylene for fruit-ripening application. The role of ethylene in natural and artificial fruit ripening and the associated health hazards are well known. So there is a growing need for ethylene detection. This paper aims to highlight potential methods developed for ethylene detection by various researchers, including ours. Intense efforts by various researchers have been on since 2014 for societal benefits.

Design/methodology/approach

The paper focuses on types of sensors, fabrication methods and signal conditioning circuits for ethylene detection in ppm levels for various applications. The authors have already designed, developed a laboratory-based set-up belonging to the electrochemical and optical methods for detection of ethylene.

Findings

The authors have developed a carbon nanotube (CNT)-based chemical sensor whose performance is higher than the reported sensor in terms of material, sensitivity and response, the sensor element being multi-walled carbon nanotube (MWCNT) in comparison to single-walled carbon nanotube (SWCNT). Also the authors have developed infrared (IR)-based physical sensor for the first time based on the strong IR absorption of ethylene at 10.6 µm. These methods have been compared with literature based on comparable parameters. The review highlights the potential possibilities for development of portable device for field applications.

Originality/value

The authors have reported new chemical and physical sensors for ethylene detection and quantification. It is demonstrated that it could be used for fruit-ripening applications A comparison of reported methods and potential opportunities is discussed.

Details

Sensor Review, vol. 40 no. 4
Type: Research Article
ISSN: 0260-2288

Keywords

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Article

Miloš Somora, A.P. Hilley, H. Binner, Gábor Hársanyi, M.S. Vijayaraghavan, Tao Sung Oh, T. Laine‐ Ylijoki, P. Collander, Boguslaw Herod, Peter Barnwell and David Lowrie

‘Soldering and Cleaning in Electronics’ international conference, including an exposition, took place in Brno on 12–13 October 1993. The conference was organised by…

Abstract

‘Soldering and Cleaning in Electronics’ international conference, including an exposition, took place in Brno on 12–13 October 1993. The conference was organised by SMT‐Info, together with the ISHM‐Czech and Slovak Chapter. The purpose of this common action was to bring together the professionals in surface mount technology and thick film technology. In the framework of the conference, in which 130 home and foreign delegates participated, the annual meeting of the ISHM‐Czech and Slovak Chapter took place.

Details

Microelectronics International, vol. 11 no. 1
Type: Research Article
ISSN: 1356-5362

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Article

Eighty‐five participants attended the 4th ISHM Display meeting at the Jaarbeurs Congress Centre in Utrecht on 16 October, 1986. The programme of the day started with the…

Abstract

Eighty‐five participants attended the 4th ISHM Display meeting at the Jaarbeurs Congress Centre in Utrecht on 16 October, 1986. The programme of the day started with the annual general membership meeting of the Benelux Chapter. The chairman, Mr T. Kwikkers, gave a short review of the state of affairs of ISHM‐Benelux and of the activities of the last year. He mentioned the temporary enlargement of the executive committee to give a new generation a chance to gain experience in the ISHM organisation and to take up some new activities. In order to raise publicity for ISHM and Hybrid Circuits a new brochure has been designed and a set of material for demonstration purposes was collected. With the material every member of the chapter can easily set up a presentation for schools or customers. This year ISHM‐Benelux has grown from 85 to 100 members and enjoys a healthy financial situation. Next year again emphasis will be put on public relations. Professor R. Govaerts signified that he was no longer available for a position in the executive committee. As Prof. Govaerts has been very active and stimulating for the ISHM‐Benelux Chapter from its foundation in 1976 up to now, the general membership meeting decided to appoint him as (the first) honorary member of this chapter. Except for Professor Govaerts, the sitting executive committee, consisting of 15 members, was re‐elected for another year. After the European conferences in Bournemouth and Hamburg the ISHM‐Benelux chapter is asked to organise the 1991 Conference. The executive committee is already looking out for candidates for a function in the organising committee, which must be formed in the coming year.

Details

Microelectronics International, vol. 4 no. 1
Type: Research Article
ISSN: 1356-5362

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Article

Rajkumar D, Ranjithkumar P, M.P. Jenarthanan and Sathiya Narayanan C

The purpose of this paper is to develop a statistical model for delamination and thrust forcing during drilling of carbon-fibre reinforced polymer (CFRP) composites using…

Abstract

Purpose

The purpose of this paper is to develop a statistical model for delamination and thrust forcing during drilling of carbon-fibre reinforced polymer (CFRP) composites using response surface methodology (RSM) to determine the input parameters (drill speed, drill diameter and feed rate) that influences the output response (delamination and thrust force) in the machining of CFRP composite using solid carbide drill cutter.

Design/methodology/approach

Three factors, three levels central composite face centred (CCFC) design, is used to conduct the experiments on CFRP by carbide drill. The whole quality evaluation (delamination) was done by video measuring system to measure the width of maximum damage of the machined CFRP composite. The thrust forces during drilling are measured using digital multi-component cutting force (Make: IEICOS, Model: 652) dynamometer. The “Design Expert 7.0” is used to analyse the data collected graphically. An analysis of variance is carried out to validate the model and for determining the most significant parameter.

Findings

The response surface model is used to predict the input factors influencing the delamination and thrust force on the drilled surfaces of CFRP composite at different cutting conditions with the chosen range of 95 per cent confidence intervals. The analysis on the influences of the entire individual input machining parameters on the delamination and thrust force has been carried out using RSM. This investigation revealed that the drill diameter is the eminent factor which affects the responses.

Originality/value

In all, 0.3, 0.4 and 0.5 mm holes have been successfully made on CFRP using vertical machining center, whereas the previous researchers have not drilled hole size less than 1 mm in CFRP using vertical machining center.

Details

Pigment & Resin Technology, vol. 46 no. 6
Type: Research Article
ISSN: 0369-9420

Keywords

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Article

Wan Junmei, T.S. Lee, C. Shu and Wu Jiankang

A numerical model is presented in this paper to better describe the cavitated fluid flow phenomena in liquid‐lubricated Asymmetrical Herringbone Grooved Journal Bearings…

Abstract

A numerical model is presented in this paper to better describe the cavitated fluid flow phenomena in liquid‐lubricated Asymmetrical Herringbone Grooved Journal Bearings (HGJBs). An effective “follow the groove” grid transformation method is used in the present study to capture all the groove boundaries. A singularity at the groove edges is avoided with this approach. Symmetrical groove patterns as well as asymmetrical groove patterns can be accurately computed with the proposed method. The difficult problem of abrupt changes of oil film thickness in the liquid‐lubricated HGJB physical domain is modeled here through a series expansion approach. Results are comparable with available experimental and known numerical data from other investigators. Cavitation footprints, pressure distributions and their corresponding load characteristics are presented in this study. Effects of the critical transitional flow phenomena on the performance of the asymmetrical HGJBs are also determined through the present study.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 12 no. 5
Type: Research Article
ISSN: 0961-5539

Keywords

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Article

Carolina Duarte, Lawrence P. Ettkin, Marilyn M. Helms and Michael S. Anderson

Venezuela ranks fifth in the world in oil proven reserves and has the largest accumulation of liquid fuel in the world. With its importance as an oil country, many…

Abstract

Venezuela ranks fifth in the world in oil proven reserves and has the largest accumulation of liquid fuel in the world. With its importance as an oil country, many countries including the U.S. have expressed concerns about Venezuela’s current economic and political situation. Using the popular SWOT analysis, Strengths, Weaknesses, Opportunities and Threats facing the country, are identified. The discussion and conclusions summarize the observations and address the relative tradeoffs within the country. Finally goals and policies appropriate for Venezuelan reform are presented.

Details

Competitiveness Review: An International Business Journal, vol. 16 no. 3/4
Type: Research Article
ISSN: 1059-5422

Keywords

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