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Article
Publication date: 7 August 2017

Li Yinghui, Chunping Xie and Xinjin Liu

The purpose of this paper is to know airflow field and its distribution of pneumatic compact spinning systems. Complete compact spinning (CCS) and four-line rollers…

Abstract

Purpose

The purpose of this paper is to know airflow field and its distribution of pneumatic compact spinning systems. Complete compact spinning (CCS) and four-line rollers compact spinning (FRCS) are both two kinds of pneumatic compact spinning systems, which utilizes airflow in condensing equipment to condense fiber bundle and improve yarn properties.

Design/methodology/approach

The paper opted for an exploratory study using finite element method, the airflow field in the condensing area of CCS and FRCS were simulated. First, a periodic movement of the fibers in bundle in condensing area was detected, and the yarn tracks were described veritably under the high-speed-video-camera and AutoCAD Software. Then the physical models of the condensing zone were constructed according to the physical parameters of the practical system. The simulation of airflow velocities were extracted along the yarn tracks using ANSYS Software. Finally, the numerical results were verified by spinning experiments.

Findings

The results show that the negative velocity component along the Y-axis helps keeping beneficial hairiness. CCS has higher negative velocity value and more abundant beneficial hairiness than FRCS. The velocity component in the X-axis direction has a direct effect on yarn evenness. For the same liner density of CCS and FRCS, the larger the value of the velocity component on X-axis is, the better the yarn evenness is. For 9.7tex, CCS has larger velocity component in the X-axis direction and better yarn evenness than FRCS, showing that CCS is more suitable for spinning fine count yarn. The velocity component in the Z-axis direction has a direct effect on breaking strength. CCS has little velocity component in the Z-axis direction and little breaking strength than FRCS.

Originality/value

To know airflow field and its distribution by finite element method is helpful to investigate the condensing principles of the fiber bundle and improve yarn properties.

Details

International Journal of Clothing Science and Technology, vol. 29 no. 4
Type: Research Article
ISSN: 0955-6222

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Article
Publication date: 1 August 2016

Xinjin Liu, Hong Zhang and Xuzhong Su

Pneumatic compact spinning is the most widely used compact spinning method at present, in which the negative pressure airflow is used to condense the fiber bundle and…

Abstract

Purpose

Pneumatic compact spinning is the most widely used compact spinning method at present, in which the negative pressure airflow is used to condense the fiber bundle and decrease the spinning triangle. Compact spinning with perforated drum and lattice apron are mainly two kinds of pneumatic compact spinning now. The purpose of this paper is to study the comparative analysis on four kinds of pneumatic compact spinning systems, including two kinds of compact spinning with perforated drum: Rieter’s COM4 and complete condensing spinning (CCS), two kinds of compact spinning with lattice apron: Sussen’s three-line compact spinning (TLCS) and Toyota’s four-line compact spinning (FLCS).

Design/methodology/approach

First, the basic properties of four systems were introduced and comparatively analyzed. Then, the 29.2 tex (20S), 14.6 tex (40S), 9.7 tex (60S) and 7.3 tex (80S) combed cotton yarns were spun in the four pneumatic compact spinning systems and ring spinning system, respectively. The evenness, breaking strength and hairiness of spun yarns were tested. Finally, the properties of corresponding woven fabric were tested.

Findings

It is shown that comparing to compact spinning with lattice apron, the disposable input cost of compact spinning with perforated drum is higher, but the maintenance cost is lower. Comparing to compact spinning with lattice apron, the evenness of yarn spun by compact spinning with perforated drum is improved whereas the breaking strength is decreased. Furthermore, although harmful long hairiness (=3 mm) of yarn spun by CCS is a little more, the beneficial short hairiness (1-2 mm) is also more, which can make the fabric fullness and have better comfortable feeling.

Originality/value

In the paper, comparative analysis on four kinds of pneumatic compact spinning systems, compact spinning with perforated drum: Rieter’s COM4 and CCS, and compact spinning with lattice apron: Sussen’s TLCS and Toyota’s FLCS, were studied. The basic properties, spun yarn qualities and properties of corresponding woven fabric of four systems were analyzed comparatively.

Details

International Journal of Clothing Science and Technology, vol. 28 no. 4
Type: Research Article
ISSN: 0955-6222

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Article
Publication date: 18 April 2017

Xinjin Liu and Xingfeng Wang

Spun silk is one of the top grade textile materials, and its products have high added value and meet the needs of the market. However, the technology level and process…

Abstract

Purpose

Spun silk is one of the top grade textile materials, and its products have high added value and meet the needs of the market. However, the technology level and process design of silk spinning are still much lower than cotton spinning; especially singeing is applied on spun silk yarn, and generates waste materials. The purpose of this paper is to introduce a kind of pneumatic compact spinning, four-line compact spinning (FLCS), into silk spinning and study the corresponding spun yarn qualities.

Design/methodology/approach

First, taking the silk spinning frame FK501 as an example, the process of modification of FLCS is presented. Then, three kinds of spun silk yarns, 80 Nm (12.5tex), 100 Nm (10tex) and 120 Nm (8.3tex), are spun on the common silk spinning frame FK501 and the spinning frame modified with FLCS. The evenness, breaking strength and hairiness of spun yarns are tested and comparatively analyzed. After the ply yarn production, three singeing procedures should be applied on the ring ply yarns, while only two singeing procedures should be applied on the compact ply yarns, which is beneficial for material saving.

Findings

The results show that compared with ring spun silk yarns, the comprehensive quality of compact spun silk yarns is improved, especially the harmful long hairiness (=3 mm) of yarn. Compared with the single spun silk yarn, the comprehensive qualities of the ply yarn are improved; especially, the breaking strength of the ply yarns is two times larger than the single yarn. After singeing, the hairiness of the ply yarn is decreased greatly, and the evenness is also improved, while the strength is decreased. Compared with ring spun silk yarn, the singeing times of compact spun silk yarn can be decreased, and the gas consumption in each singeing is also decreased, which is beneficial for material saving.

Originality/value

In this paper, a kind of pneumatic compact spinning, FLCS, is introduced into the silk spinning. It is shown that compared with ring spun silk yarns, the comprehensive quality of compact spun silk yarns is improved, especially the harmful long hairiness (=3 mm) of yarn. After the ply yarn production, three singeing procedures should be applied on the ring ply yarns, while only two singeing procedures should be applied on the compact ply yarns, which is beneficial for material saving.

Details

International Journal of Clothing Science and Technology, vol. 29 no. 2
Type: Research Article
ISSN: 0955-6222

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Article
Publication date: 1 September 2001

Roos Wemmenhove and Wouter T. de Groot

As part of their commitment to sustainable development, the “greening” of curricula is a major objective of universities world‐wide. This paper describes the process of…

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1000

Abstract

As part of their commitment to sustainable development, the “greening” of curricula is a major objective of universities world‐wide. This paper describes the process of identifying principles for the (re)design of courses and programmes towards this aim within the University of Dar es Salaam, Tanzania. These principles were elicited bottom‐up, from staff’s and students’ own visions of the issues involved. In their most condensed form, the principles thus found are: environment for development; in interaction with Tanzanian society; and in a student‐activating style. This contrasts with the usual conceptualisation of environment and development as normatively separate issues, with the trend to globalise the environmental issue, and with the top‐down teaching style that still dominates most universities. Both the study’s methods and its findings may be relevant for many more universities in the developing world.

Details

International Journal of Sustainability in Higher Education, vol. 2 no. 3
Type: Research Article
ISSN: 1467-6370

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Abstract

Details

Radical Proceduralism
Type: Book
ISBN: 978-1-80043-721-0

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Article
Publication date: 4 November 2014

Sara J. Wilkinson

The purpose of this study was to investigated the importance of environmental attributes for office building adaptation and whether the importance of environmental…

Abstract

Purpose

The purpose of this study was to investigated the importance of environmental attributes for office building adaptation and whether the importance of environmental attributes for adaptation has changed over time from 1998-2008 to 2009-2011. With 1-2 per cent added to the total stock of buildings each year and the need to take action to mitigate the impacts of predicted climate change (IPCC, 2013), it is necessary to focus efforts on adaptation of existing buildings.

Design/methodology/approach

This research adopted a quantitative approach, using a database of office building attributes and applying principal component analysis to ascertain the respective importance of various building attributes in adaptation. Using two databases; the first dating from 1998 to 2008 and comprising 5,290 adaptation events and the second covering the period 2009 to 2011 and comprising 1,272 adaptation events, a comparison of results was undertaken.

Findings

The findings indicate the importance of some environmental attributes in building adaptation has changed and that legislation and changes market perceptions towards to promote built environment sustainability may be having a positive impact. The research demonstrates that different property attributes vary in importance over time and used existing buildings in an international city to confirm application to urban settlements elsewhere where existing buildings can be adapted to reduce the effect of climate change.

Research limitations/implications

The databases are limited to Melbourne, Australia and to these specific points in time. It is possible that other cities are seeing changes in adaptation practices to accommodate increased awareness and the growing importance attributed to environmental issues; however, additional studies would be required to ascertain whether the level of importance was stronger or weaker than that found in Melbourne.

Practical implications

The impacts of the mandatory The National Australian Built Environment Rating System energy rating tool and the Green Star voluntary tool provide actionable data for property stakeholders and the academic community. Policy-makers can see that building owners are integrating environmental attributes into their stock and that the market is shifting towards increased sustainability. This study uses real world data to feed the scholarship process, with real economic and commercial impacts. New buildings account for about 1-2 per cent of the total building stock annually and existing buildings must be adapted, and thus the questions of the success of voluntary or mandatory measures are essential to future environmental decision-making.

Originality/value

This research reports on data covering all office building adaptation conducted from 1998 to 2011 in the Melbourne CBD. As such, it is a comprehensive analysis of all works undertaken and how the significance of different physical, social, economic and environmental attributes is changing over time.

Details

Journal of Corporate Real Estate, vol. 16 no. 4
Type: Research Article
ISSN: 1463-001X

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Article
Publication date: 7 January 2014

Subhash Asanga Abhayawansa

With a view to enabling organisations provide a clear understanding of firm value creation, several national and supranational institutions have produced guidelines and…

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2303

Abstract

Purpose

With a view to enabling organisations provide a clear understanding of firm value creation, several national and supranational institutions have produced guidelines and frameworks for externally reporting intellectual capital (IC). In many cases regulators, the accounting profession and accounting scholars have driven these initiatives. The purpose of this paper is to summarise, analyse and compare the guidelines and frameworks that have been developed with a focus on externally reporting IC.

Design/methodology/approach

The paper analyses the assumptions underpinning 20 guidelines and frameworks that have been developed with a focus on reporting IC using a self-constructed framework.

Findings

The review resulted in a comparison of IC reporting guidelines and framework based on target audience, role of IC within the organisational strategic management process and reporting IC indicator. It provides an understanding of the state of the art in relation to external reporting of IC.

Practical implications

The insights provided by the comparison of the guidelines and frameworks are likely to be helpful for practitioners wanting to adopt or develop an IC reporting model for their organisation. Policy-makers will find these insights beneficial when attempting to refine existing frameworks and guidelines for reporting IC and in developing new ones to suit various circumstances. Also, this paper provides a useful review for academics.

Originality/value

This is the first paper to provide a review of a large number of business reporting guidelines and frameworks with a focus on IC. It is a valuable reference for practitioners, policy-makers and academics on IC reporting models.

Details

Journal of Intellectual Capital, vol. 15 no. 1
Type: Research Article
ISSN: 1469-1930

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Article
Publication date: 1 February 2008

Victoria Little, Richard Brookes and Roger Palmer

This paper aims to demonstrate how a Contemporary Marketing Practices (CMP)‐based living case study approach can be used to enhance student learning, and to develop new…

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1418

Abstract

Purpose

This paper aims to demonstrate how a Contemporary Marketing Practices (CMP)‐based living case study approach can be used to enhance student learning, and to develop new theory about marketing practice.

Design/methodology/approach

The paper compares and contrasts teaching cases and research cases to create context. It then describes two examples of the living case study approach: one project directed at understanding the impact of information technologies (IT) on marketing practice, and the other at examining managerial understandings of customer value.

Findings

The study finds that a living case approach extends insight into antecedents and consequences of marketing practice, consistent with CMP research objectives. New conceptual frameworks for the IT adoption process and conceptions of customer value are co‐created by executive students and the authors. It shows that managers are able contributors to theory development. The paper concludes that the living case approach provides a rich “zone of mutuality” between research and teaching.

Research limitations/implications

Action learning can be used in business schools to enhance theoretical and practical understanding of complex process‐based phenomena.

Practical implications

The living case study is suited to post‐experience students rather than undergraduates. In addition to considering the nature of the student body, faculty should also consider fit with their personal competencies and the curriculum prior to taking this approach. However, it should be done so advisedly.

Originality/value

The study stimulates reflection on alternative approaches to teaching and learning in executive education, and to theory development in marketing practice.

Details

Journal of Business & Industrial Marketing, vol. 23 no. 2
Type: Research Article
ISSN: 0885-8624

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Article
Publication date: 1 February 1997

Flora Page

Fraud is not yet universally recognised or understood as a crime, in the way that theft is. All sectors of our society recognise shoplifting as a crime, whereas an…

Abstract

Fraud is not yet universally recognised or understood as a crime, in the way that theft is. All sectors of our society recognise shoplifting as a crime, whereas an exaggerated insurance claim tends to be seen more as a matter of personal morality than public law and order.

Details

Journal of Financial Crime, vol. 4 no. 4
Type: Research Article
ISSN: 1359-0790

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Book part
Publication date: 6 June 2006

Jody Clay-Warner

Research consistently finds that procedural justice affects emotional reactions to inequity. This research, however, has failed to examine the ways in which contextual…

Abstract

Research consistently finds that procedural justice affects emotional reactions to inequity. This research, however, has failed to examine the ways in which contextual factors may alter the impact of fair procedures on emotions. Here, I argue that collective legitimacy is one such contextual factor, and I develop hypotheses related to this argument. I also suggest that procedural justice researchers should examine discrete emotions, because the combined effects of legitimacy and procedural justice vary depending upon the emotion in question. In highlighting the interplay between legitimacy and procedural justice, this paper also underscores the necessity of studying procedural justice within the context of the group.

Details

Advances in Group Processes
Type: Book
ISBN: 978-0-76231-330-3

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