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Article

Zhu Feng, Shaotao Zhi, Lei Guo, Chong Lei and Yong Zhou

This paper aims to investigate magnetic field anneal in micro-patterned Co-based amorphous ribbon on giant magneto-impedance (GMI) effect enhancement.

Abstract

Purpose

This paper aims to investigate magnetic field anneal in micro-patterned Co-based amorphous ribbon on giant magneto-impedance (GMI) effect enhancement.

Design/methodology/approach

The amorphous ribbons were annealed in transverse and longitudinal magnetic field. The influence of different field annealing directions on GMI effect and impedance Z, resistance R and reactance X with a series of line width have been deeply analyzed.

Findings

In comparison with GMI sensors microfabricated by unannealed and transversal field annealed ribbons, GMI sensor which was designed and microfabricated by longitudinal field anneal ribbon performs better. The results can be explained by the domain wall motion and domain rotation during annealing process and the geometric structure of Co-based GMI sensor. In addition, shrinking the line width of GMI sensor can promote GMI effect significantly because of the effect of demagnetizing field, and the optimum GMI ratio is 209.7 per cent in longitudinal field annealed GMI sensor with 200 μm line width.

Originality/value

In conclusion, annealing in longitudinal magnetic field and decreasing line width can enhance GMI effect in micro-patterned Co-based amorphous ribbon.

Details

Sensor Review, vol. 39 no. 3
Type: Research Article
ISSN: 0260-2288

Keywords

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Article

Zhu Feng, Shaotao Zhi, Xuecheng Sun, Lili Yan, Cui Liu and Chong Lei

This paper aims to investigate the influence of structure parameters on giant-magnetoimpedance (GMI) effect measured by non-contact method.

Abstract

Purpose

This paper aims to investigate the influence of structure parameters on giant-magnetoimpedance (GMI) effect measured by non-contact method.

Design/methodology/approach

The GMI sensor contains a Co-based internal magnetic core fabricated by laser cutting and an external solenoid. The influences of magnetic permeability of magnetic core and structure parameters on GMI effect were calculated in theoretical model. The output impedance, resistance, reactance and GMI ratio were measured by non-contact method using impedance analyzer.

Findings

Enhancing external magnetic field intensity can decrease the magnetic permeability of core, which has vital influences on the magnetic property and the output response of GMI sensor. In addition, increasing the width of magnetic core and the number of solenoid turns can increase the maximum GMI ratio. The maximum GMI ratio is 3,230% with core width of 6 mm and solenoid turns of 200.

Originality/value

Comparing with traditional contact-measured GMI sensor, the maximum GMI ratio and the magnetic field sensitivity are improved and the power consumption is decreased in non-contact measured GMI sensor. GMI sensor measured by non-contact method has a wide range of potential applications in ultra-sensitive magnetic field detection.

Details

Sensor Review, vol. 40 no. 6
Type: Research Article
ISSN: 0260-2288

Keywords

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Article

Chong Chin Wei, Chong Siong Choy and Wong Kuan Yew

The purpose of this paper is to assess the perceived importance and actual level of implementation of five preliminary success factors, four knowledge management (KM

Abstract

Purpose

The purpose of this paper is to assess the perceived importance and actual level of implementation of five preliminary success factors, four knowledge management (KM) strategies and three KM processes towards the performance of the Malaysian telecommunication industry.

Design/methodology/approach

A questionnaire survey was conducted on telecommunication companies based on a convenience sampling technique. Data were analyzed using paired t‐tests and multiple regression analyses.

Findings

The results show that Malaysian telecommunication organizations view all the KM preliminary success factors, strategies and process as important and critical but fall short of implementation. K Audit, K Map, leadership, measurement, construction and embodiment are the variables that have the largest gap between perceived importance and actual implementation. For perceived importance, culture is the only important variable associated with organizational performance whereas for actual implementation, both business strategy and construction process are found to be significantly associated with organizational performance.

Research limitations/implications

This paper was conducted in only one industry in Malaysia. Furthermore, it focuses on KM implementation rather than on learning and knowledge utilization. This paper provides a framework for developing an instrument for assessing the use of preliminary elements in the Malaysian telecommunication industry. Telecommunication organizations have to overcome problems identified and enhance their implementation level in order to achieve better organizational performance.

Originality/value

This paper has extended knowledge in KM, especially concerning implementation issues at the beginning stage of KM. Moreover, it is among the first empirical work to specifically examine preliminary success factors, processes and strategies that affect the preliminary implementation of KM.

Details

Journal of Knowledge Management, vol. 13 no. 1
Type: Research Article
ISSN: 1367-3270

Keywords

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Article

Miao He, Miao Hao, George Chen, Xin Chen, Wenpeng Li, Chong Zhang, Haitian Wang, Mingyu Zhou and Xianzhang Lei

High voltage direct current (HVDC) cable is an important part in the electric power transmission and distribution systems. However, very little research has been carried…

Abstract

Purpose

High voltage direct current (HVDC) cable is an important part in the electric power transmission and distribution systems. However, very little research has been carried out on partial discharge under direct current (DC) conditions. Niemeyer’s model has been widely used under alternating current (AC) conditions. This paper aims to intend to modify the Niemeyer’s model considering both electric field and charge dynamics under DC conditions, and therefore proposes a numerical model describing partial discharge characteristics in HVDC cable.

Design/methodology/approach

This paper intends to understand partial discharge characteristics under DC conditions through numerical modelling. Niemeyer’s model that has been widely used under AC conditions has been modified, taking both electric field and charge dynamics under DC conditions into consideration. The effects of loading level or current through the conductor, cavity location and material properties on partial discharges have also been studied.

Findings

Electrical conductivity is important in determining the characteristics of partial discharge under DC conditions and discharges tend to happen in short when the cavity field exceeds the inception level under the parameter values studied in the paper.

Research limitations/implications

Building the numerical model is the purpose of the paper, and there is lack in experiment and the comparison between the simulation results and experiment.

Practical implications

The proposed model provides the numerical model describing partial discharge in HVDC cable and helps understand the partial discharge mechanism under DC voltage.

Originality/value

To the best of the author’s knowledge, this paper is a very early research on the numerical modelling work on partial discharge under DC voltage.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 2
Type: Research Article
ISSN: 0332-1649

Keywords

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Article

Miao He, Miao Hao, George Chen, Wenpeng Li, Chong Zhang, Xin Chen, Haitian Wang, Mingyu Zhou and Xianzhang Lei

For the dramatically developed high voltage direct current (HVDC) power transmission, HVDC cables play a vital role in the power transmission across seas and connections…

Abstract

Purpose

For the dramatically developed high voltage direct current (HVDC) power transmission, HVDC cables play a vital role in the power transmission across seas and connections with renewable power sources. However, the condition monitoring of HVDC cables is still a challenging research topic. This paper aims to understand the influence of external factors, namely, current, cavity location and material properties, on partial discharge (PD) characteristics in HVDC cable in a numerical way referring to the refined Niemeyer’s model.

Design/methodology/approach

The influences of the three external factors are studied by a proposed numerical model for DC PDs based on the modification of a conventional PD model for AC voltage via a finite element analysis method.

Findings

The external factors can influence the discharge magnitude and discharge repetition rate via affecting the electrical conductivity of the material: DC PD is more frequent and with higher discharge magnitude when the cavity is closer to the conductor or the current through the conductor is higher. Both DC PD repetition rate and average discharge magnitude in long-term aged material are lower than virgin material. The effect of discharge on insulation degradation becomes decreasingly significant.

Research limitations/implications

The current work is based on the numerical modelling of DC PDs. Further experimental validations and comparisons are essential for improving the model.

Practical implications

The studies of the influence factors for PDs under HVDC voltage can benefit the research and practical power transmission on DC PDs, contributing the design and test of DC PDs in HVDC cables, exploring the understandings of the DC PDs’ mechanism.

Originality/value

This paper, to the best of author’s knowledge, first studies the influence factors on DC PDs based on the numerical modelling work.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 3
Type: Research Article
ISSN: 0332-1649

Keywords

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Article

Sujeet Kumar Sharma, Srikrishna Madhumohan Govindaluri, Saeed Al-Muharrami and Ali Tarhini

Mobile banking (Mbanking) is one of the most widely used mobile technology applications in recent times. This research aims to develop and test a research model by…

Abstract

Purpose

Mobile banking (Mbanking) is one of the most widely used mobile technology applications in recent times. This research aims to develop and test a research model by integrating social influence, trust and compatibility along with demographic variables into the original technology acceptance model (TAM) for Mbanking adoption which can be useful for understanding individual behaviours from an international business perspective.

Design/methodology/approach

Data were collected through a structured survey from 208 Omani Mbanking users and analysed using a two-staged regression and neural network (NN) model.

Findings

The results showed that perceived ease of use and demographic variables were not statistically significant in the multiple linear regression model, whereas the importance of the aforementioned variables was relatively high in the results obtained from the NN model. Furthermore, other predictors, namely, trust, perceived usefulness, compatibility and social influence included in the proposed research model that were established as significant by the regression model were assigned high relative importance by the NN model as well.

Practical implications

The study reflects the customer’s opinion from a developing country perspective. In addition, the research makes a significant theoretical contribution by using predictive modelling instead of causal or explanatory modelling for the development of a new and extended TAM model. The findings can be gainfully used by international business to understand Omani customer- and design-appropriate strategies for market penetration.

Originality/value

This study offers deeper understanding about Mbanking adoption from a developing country perspective and identifies and integrates important variables that influence the adoption in the aforementioned context.

Details

Review of International Business and Strategy, vol. 27 no. 1
Type: Research Article
ISSN: 2059-6014

Keywords

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Book part

Serpil Meri-Yilan

With the widespread use of technology, computer-assisted language learning (CALL) has recently gained a vital momentum as it improves communication competence in an

Abstract

With the widespread use of technology, computer-assisted language learning (CALL) has recently gained a vital momentum as it improves communication competence in an authentic, real-life learning environment. Therefore, the current chapter presents a discussion of the humanization of English language teaching (ELT) by using CALL tools in a higher education institution. Sixteen Turkish students who were studying in the preparatory class in a Turkish state university were included in the study. The research was designed focusing on a qualitative research method. Joint interviewing was conducted at the beginning and end of the academic year, 2018–2019. The interview questions were asked about their perceptions of learning via CALL in the classroom. The findings from the first and second interviews were compared and analyzed according to what they thought and how they were affected. The empirical data presented in this chapter explicated students’ views on the humanization of ELT through CALL in Turkish tertiary English preparatory classes. Ultimately, this chapter sets the grounds for students, teachers, higher education institutions and designers to consider the possible effects of CALL to enhance the humanization of ELT.

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Article

Ghazaleh Hasanian, Chin Wei Chong and Geok Chew Gan

The purpose of this paper is to study the application of knowledge management (KM) factors on customer relationship management (CRM) process in Malaysian Multimedia Super…

Abstract

Purpose

The purpose of this paper is to study the application of knowledge management (KM) factors on customer relationship management (CRM) process in Malaysian Multimedia Super Corridor (MSC) status organisations.

Design/methodology/approach

A questionnaire survey was conducted on KM workers (customer service) in Malaysian MSC status organisations. Based on the extensive review of the current literature, eight KM factors were investigated to examine the application toward CRM process.

Findings

The data, collected from 96 knowledge workers, suggest that KM process, organisational infrastructure and technology are three important predictors for effective CRM process.

Practical implications

The practical implication of this paper could be useful for business managers who want to enhance organisational CRM through implementing KM practices to support their organisation’s KM efforts.

Originality/value

This is one of the few papers to study the application of KM factors on CRM process in Malaysia.

Details

Library Review, vol. 64 no. 8/9
Type: Research Article
ISSN: 0024-2535

Keywords

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Article

De-Graft Owusu-Manu, A.S. Kukah, David John Edwards, Erika Anneli Pärn, Hatem El-Gohary and Clinton Aigbavboa

The purpose of this paper was to assess the causal relationship(s) between moral hazard and adverse selection of public–private partnership (PPP) construction projects…

Abstract

Purpose

The purpose of this paper was to assess the causal relationship(s) between moral hazard and adverse selection of public–private partnership (PPP) construction projects. Structural equation modelling (SEM) was used to explore the cause and effect relationship between moral hazard and adverse selection problems in PPP construction projects in Ghana. The study produced a framework to predict, estimate and depict the complex causal relationships (i.e. the directionality) between moral hazard and adverse selection.

Design/methodology/approach

To test the proposed framework, a quantitative methodology was used, in which, data were collected using research questionnaires that targeted a sample of 280 PPP stakeholders in Ghana. In total, 210 useable questionnaires were retrieved, representing a response rate of 75 per cent.

Findings

The interrelationships between the eight causes and the nine effects of moral hazard and adverse selection were established using the model. The tested framework showed the degree of association and isolation of the unobserved variables on the indicator factors. Confirmatory factor analysis (CFA) was used to evaluate the fit of items to latent constructs. Because the fit of each model was good and the item loadings were adequate, it was assumed that the indicators of the different variables factors were fitting. Furthermore, a diagnostic fit analysis was conducted using the robust maximum likelihood method to test the statistical significance of the parameter estimates.

Practical implications

This novel research is one of the few studies investigating the causal relationships between moral hazard and adverse selection of PPP construction projects. The research concluded with future studies that seek to validate the model developed in other countries and/or other industries.

Originality/value

The research findings will serve as a guide for construction stakeholders in the PPP sector on the causes and effects of adverse selection and moral hazard and how to mitigate these.

Details

Journal of Engineering, Design and Technology, vol. 16 no. 3
Type: Research Article
ISSN: 1726-0531

Keywords

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Article

Xiao-feng Zhang, Xiao-juan Zhang, Lei Li, Gui-quan Li and You-min Xi

This study aims to focus on the authority formation process of Chinese enterprise leaders, with the purpose of finding out how an ordinary newly established firm leader…

Abstract

Purpose

This study aims to focus on the authority formation process of Chinese enterprise leaders, with the purpose of finding out how an ordinary newly established firm leader develops into a real top leader and achieves the status of legitimacy in a well-known enterprise.

Design/methodology/approach

Based on constructivist grounded theory, this paper investigates the formation mechanism of entrepreneurial authority in China by using the rich data of Liu Chuan-zhi’s leader activities.

Findings

In the “evolution” path of authority formation, leaders continually consolidate and improve their authority through two classes of exceptional management activities: “emergency rescue” and “promotion activities”. The successful realization of exceptional management activities benefits from a leader’s management experience accumulation and relationship maintenance with the government. In the “design” path of authority formation, leaders consolidate and improve their authority by exercising their position of power. Leaders’ legitimacy is reflected by making strategic decision and demonstrating discretion of position power. Additionally, passing on an inspiring leader’s thoughts and ideas to an organization’s members is accomplished through the construction of organization culture, institutionalization and convention.

Research limitations/implications

First, the findings are based on only Liu Chuan-zhi’s case. The authors still need more cases to compare and develop the findings and seek theoretical saturation in a broader sense. Second, the qualitative analysis is based on secondary data and future research could consider the introduction of interviews, video and other types of research data.

Originality/value

Under the parallel paths which are “evolution” and “design”, the dynamic leader authority formation model in China is founded.

Details

Nankai Business Review International, vol. 7 no. 3
Type: Research Article
ISSN: 2040-8749

Keywords

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