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1 – 10 of over 8000Elham Vatankhah, Mohammad Sheikhzadeh and Mehdi Darvishzadeh
Cloth fell distance is an effective parameter on controlling pick density during weaving process. The purpose of this study is developing a novel, simple and economic system to…
Abstract
Purpose
Cloth fell distance is an effective parameter on controlling pick density during weaving process. The purpose of this study is developing a novel, simple and economic system to measure the cloth fell distance from the front position of the reed in each cycle of weaving process dynamically.
Design/methodology/approach
This novel system consists of optical sensors used to measure difference between time the reed reaches the cloth fell and time the reed reaches the front. To interpret this time difference to cloth fell distance, reed motion equation has been used. The reed motion curve in terms of angular position of the crankshaft can be calculated by mathematical analysis.
Findings
This method combining the electronic components and mechanical mechanism of reed motion measures the cloth fell distance online.
Originality/value
This simple and economic method can be used in all types of weaving machine. High accuracy and high speed processing in comparison to previous reported methods are the most advantages of this new real‐time system.
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The purpose of this paper is to review the advancements in development of high aspect ratio microfabrication (HARM) type of micro-electro-mechanical systems (MEMS) reed switch…
Abstract
Purpose
The purpose of this paper is to review the advancements in development of high aspect ratio microfabrication (HARM) type of micro-electro-mechanical systems (MEMS) reed switch sensors for much improved performance in a much more compact package.
Design/methodology/approach
The paper presents an in-depth review of a number of applications of HARM built MEMS reed switches and consultation with a manufacturer.
Findings
One manufacturer has introduced a totally new way to fabricate reed switches which brings numerous benefits such as reliability, higher voltage capability, lower contact resistance and other features in a new tiny package.
Practical implications
Manufacturers of devices needing the benefits of the reed switch concept but who need a much smaller and compact switch now have a new option to explore.
Originality/value
An expert insight into how to solve reed switching problems where space is at a premium.
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This study is a replication of Wolff and Reed’s (2000) work. The purpose of this paper is to examine how the combination of resources brought to joint ventures influence…
Abstract
Purpose
This study is a replication of Wolff and Reed’s (2000) work. The purpose of this paper is to examine how the combination of resources brought to joint ventures influence parent-firm performance. This study is also interested in whether or not the exposure of immobile resources through the semi-transparent membrane of the joint venture can have negative effects on parent-firm performance.
Design/methodology/approach
The sample consists of two-parent joint ventures formed by publicly traded US firms between 1997 and 2013. The event-study methodology is used to calculate each parent-firm’s abnormal returns. This work also uses content analysis to analyze parent-firms’ annual reports (10-K).
Findings
While Wolff and Reed’s results on resource allocation within joint ventures were not statistically significant, this replication study provided strong support to the resource allocation hypothesis. It was found that intangible resource heterogeneity within a joint venture creates higher performance gains for parent-firms than tangible resource heterogeneity. This work also successfully replicated Wolff and Reed’s findings on the negative impact of immobile resources exposure on parent-firm performance. Wolff and Reed’s results on resource complementarity were, however, not successfully replicated.
Originality/value
This replication study goes beyond simply showing that engaging in a joint venture strategy creates value for parent-firms. Through the use of a new content analysis method, this study was able to provide strong support for Wolff and Reed’s theory on the performance gains provided by resource heterogeneity in a joint venture setting, and to confirm the results on potential adverse performance effects of immobile resources exposure.
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A Theoretical Approach to Assessing the Thermodynamic Process Within the Combustion Chamber of the Propulsive Duct, an Examination of the Potential of the Duct with Special…
Abstract
A Theoretical Approach to Assessing the Thermodynamic Process Within the Combustion Chamber of the Propulsive Duct, an Examination of the Potential of the Duct with Special Reference to the Application of Feedback and Spark Discharge Techniques. The type of valve of greatest importance to successful duct design is one which is synchronized to the pressure fluctuations within the combustion zone. Although there have been a number of proposals for mechanically linked valves (indeed the normal internal combustion engine works on this principle) and rotary valves, these have severe limitations at the higher frequencies and are generally impracticable for the application under review. This section will therefore concentrate on the mechanical reed‐type valve which, theoretically, need have only one moving part, i.e. the dynamic metal reed, and the aerodynamic valve which relies upon the interaction of two gas dynamical vibrations and has no moving mechanical parts.
S.S. Bhattacharya and Milind Koranne
Development of a technique for weaving seamless three‐dimensional shapes directly on loom is an essential step in producing seamless woven garments. The purpose of this paper is…
Abstract
Purpose
Development of a technique for weaving seamless three‐dimensional shapes directly on loom is an essential step in producing seamless woven garments. The purpose of this paper is to report a new approach to weaving seamless three‐dimensional shapes.
Design/methodology/approach
Spacing of warp and weft threads varies in shape region. Reeds with shaped reed wires are developed to change spacing of warp threads. Interlacement pattern of warp and weft threads is selected that assists in changing spacing of threads. The new approach of weaving three‐dimensional shapes in folded form is developed, that offers advantages over weaving shape in erect form.
Findings
The main findings were mathematical determination of shapes of reed wires to produce a three‐dimensional woven shape and weaving shape in folded form.
Originality/value
The paper demonstrates how three‐dimensional shapes are woven in folded form without the need of eliminating ends.
Details
Keywords
Li Hong, Yewei Wang, Zhongchao Qiu, Jianxian Cai, Zhenjing Yao and Zhitao Gao
The purpose of this paper is to solve the problem of weak low-frequency vibration measurement capability of FBG accelerometer, and propose a FBG accelerometer based on cross reed.
Abstract
Purpose
The purpose of this paper is to solve the problem of weak low-frequency vibration measurement capability of FBG accelerometer, and propose a FBG accelerometer based on cross reed.
Design/methodology/approach
This study proposed a new type FBG acceleration sensor based on cross reeds. When the sensor vibrates, the mass block in the new structure rotates around the center of the cross reeds, which could eliminate the impact of friction, reduce the natural frequency of the sensor and improve its sensitivity. This study theoretically analyzed the impact of several structural parameters on the sensitivity and natural frequency of the proposed sensor and used COMSOL to perform static stress analysis and modal simulation; in this study, a test system was built to test the performance of the proposed sensor.
Findings
The test results revealed that the proposed sensor had a natural frequency of 94 Hz; within a low-frequency range of 1–65 Hz, its sensitivity response was flat, the dynamic range was 81.89 dB, the sensitivity was 243.59 pm/g and the linearity was 99.97%. The cross reeds effectively strengthened the structural stability, the relative standard deviation of the repeatability of the sensor was 0.89% and the transverse crosstalk in the working frequency band was −26.97 dB.
Originality/value
This study innovatively proposes the structure of the two symmetrical cross reeds, which can improve sensitivity by eliminating the influence of friction, and the structure of cross reeds can effectively suppress the influence of lateral crosstalk. The proposed sensor can realize real-time accurate measurement of low-frequency weak vibration signals.
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Franklin Gyamfi Agyemang, Nicoline Wessels and Madely Du Preez
This study examines what constitutes competence and how a novice becoming a competent weaver is enabled by information literacy in the fabric-weavers’ workplace landscape.
Abstract
Purpose
This study examines what constitutes competence and how a novice becoming a competent weaver is enabled by information literacy in the fabric-weavers’ workplace landscape.
Design/methodology/approach
Ethnography as a research design was employed using participant observation and semi-structured interviews as the data collection techniques.
Findings
Competence constitutes the demonstration of Kente knowledge and mentorship capability enabled by information literacy through access to the on-the-loom and off-the-loom information in the Kente-weaving landscape.
Research limitations/implications
This study explains how the transition from a novice weaver to a competent weaver is underpinned by information literacy.
Originality/value
This is one of the first studies that contribute to the understanding of information literacy in the craft workplace. The study proposes a framework for weavers' information literacy practice.
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With over 25 years experience of helping people find jobs across a wide spectrum of office vacancies, Reed Employment has recognised the dread with which many people approach…
Abstract
With over 25 years experience of helping people find jobs across a wide spectrum of office vacancies, Reed Employment has recognised the dread with which many people approach interviews. With this in mind, Reed has published a booklet The Reed Guide to Successful Interviews, packed with useful advice and tips. However competent people are at doing the job itself interview technique is an art well worth perfecting, and the Guide gives advice on all aspects of the interview procedure — from preparation and appearance, to the questions that usually crop up and often catch the interviewee unaware. It also considers the impact of the modern office requiring the technical skills of Word Processing and shows how, with free Reed training, this need not be an obstacle.
Reed buys MDC and maps out European plans … European expansion is a key element in the acquisition of Mead Data Central by Reed Elsevier, according to MDC's President, Rod…
Abstract
Reed buys MDC and maps out European plans … European expansion is a key element in the acquisition of Mead Data Central by Reed Elsevier, according to MDC's President, Rod Everhart. A name change is also in the works, as is the loading of Reed Elsevier databases.
The Donner expedition to California in 1846‐1847 is one of the darkest tales of the great migrations west. While much has been written about the tragedy, a group analysis based on…
Abstract
Purpose
The Donner expedition to California in 1846‐1847 is one of the darkest tales of the great migrations west. While much has been written about the tragedy, a group analysis based on business research has not been undertaken. The purpose of this paper is to suggest that the story of the Donner Party is primarily a group failure, with implications for practicing managers employing temporary groups in uncertain situations.
Design/methodology/approach
Group theories concerning the nature of temporary work groups, interdependence, diversity, social identity, and leadership are employed to explain how negative group processes likely contributed to the disaster.
Findings
Based on books and a film about the incident, the Donner Party suffered a social breakdown based on: the changing nature of the goals of the expedition in mid‐course, which is difficult for temporary teams to handle; destructive forms of diversity based on cultural background and social status; and a lack of critical skills and effective leadership. The story also illustrates that small, cohesive groups had a better survival rate than individuals.
Research limitations/implications
While only a single case, this study demonstrates the special nature of temporary groups and demonstrates that not all diversity is positive. Both issues require strong leadership. Furthermore, the study demonstrates the importance of considering context in group research.
Originality/value
This is an original analysis of the Donner Party using group theories. This study reminds managers of the fragility of temporary groups, and stresses the need to consider the possibilities of accidents/disasters when undertaking large projects.
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