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Article
Publication date: 23 February 2018

Yage Zhan, Ziyang Shen, Zeyu Sun, Qiao Yu, Hong Liu and Yong Kong

The purpose of this paper is to theoretically analyze and experimentally demonstrate the investigation of and present a kind of sensing system for monitoring simultaneous…

Abstract

Purpose

The purpose of this paper is to theoretically analyze and experimentally demonstrate the investigation of and present a kind of sensing system for monitoring simultaneous temperature and strain measurements based on highly nonlinear fiber (HNLF) and single mode fiber (SMF).

Design/methodology/approach

First, the stimulated Brillouin scattering (SBS) characteristics of the HNLF have been studied, including the Brillouin gain bandwidth, Brillouin gain center frequency and SBS threshold. Second, based on the Brillouin gain center frequency, the Brillouin frequency shift coefficients of strain and temperature in HNLF have been studied. Third, the sensing and signal interrogation scheme for simultaneous monitoring of temperature and strain with high resolution has been presented.

Findings

It is found that the HNLF has a wider Brillouin gain bandwidth. The SBS threshold of HNLF is 78 mW, which is much larger than 7.9 mW of SMF. Also, the Brillouin frequency shift coefficients of strain and temperature in HNLF are 0.0308 and 0.413 MHz/°C, respectively.

Originality/value

The larger threshold of SBS is useful to avoid SBS under certain situations that Spontaneous Brillouin Scattering is necessary and should be applied. The technique is based on the fact that the Brillouin frequency shift coefficients of strain and temperature in HNLF are different from those in SMF. Therefore, the two-parameter monitoring can be achieved by producing SBS and obtaining the back-scattering Brillouin signal light simultaneously in HNLF and SMF.

Details

Sensor Review, vol. 39 no. 1
Type: Research Article
ISSN: 0260-2288

Keywords

Article
Publication date: 22 November 2018

Chen Shen, Youping Chen, Bing Chen and Yu Qiao

This paper aims to propose a novel robot kinematic calibration method based on the common perpendicular line (CPL) model to improve the absolute accuracy of industrial robots.

Abstract

Purpose

This paper aims to propose a novel robot kinematic calibration method based on the common perpendicular line (CPL) model to improve the absolute accuracy of industrial robots.

Design/methodology/approach

The deviation between the nominal and actual twists is considered the CPL transformation, which includes the rotation about the CPL and the translation along the CPL. By using the invariance of the reciprocal product of the two spatial lines, the previous deviation was analyzed in the neighbor space of the base frame origin. In this space, the line vector of the CPL contained only four independent parameters: two orientation elements and two moment elements. Thus, the CPL model has four independent parameters for the revolute joint and two parameters for the prismatic joint.

Findings

By simulations and experiment conducted on a SCARA robot and a 6-DOF PUMA robot, the effectiveness of the novel method for calibration of industrial robot is validated.

Originality/value

The CPL model avoided the normalization and orthogonalization in the iterative identification procedure. Therefore, identifying the CPL model was not only simpler but also more accurate than that of the traditional model. In addition, the results of the CPL transformation strictly conformed to the constraints of the twist.

Details

Industrial Robot: An International Journal, vol. 45 no. 6
Type: Research Article
ISSN: 0143-991X

Keywords

Content available
Article
Publication date: 18 May 2015

Qiao Yu

82

Abstract

Details

China Finance Review International, vol. 5 no. 2
Type: Research Article
ISSN: 2044-1398

Article
Publication date: 21 September 2015

Yage Zhan, Qiao Yu, Kun Wang, Fu Yang and Borui Zhang

The purpose of this paper is to theoretically analyze and experimentally demonstrate the investigation on and optimization of a distributed optical fiber sensor based on…

Abstract

Purpose

The purpose of this paper is to theoretically analyze and experimentally demonstrate the investigation on and optimization of a distributed optical fiber sensor based on phase-sensitive optical time domain reflectometer (F-OTDR) for disturbance detection.

Design/methodology/approach

The F-OTDR system is investigated and optimized in two aspects: the hardware parameter and the interrogation scheme.

Findings

Based on the optimized hardware and the new interrogation scheme, the performances of the F-OTDR system have been improved greatly, compared with conventional F-OTDR system. A location accuracy of 2 m and a signal-to-noise ratio (SNR) of 16 dB have been achieved under a spatial resolution of 8 m. On the other hand, four disturbances at four different locations have been detected and located simultaneously, which is the most effective detection system with the maximum detection capability reported to date, to the best of the authors’ knowledge.

Originality/value

Four disturbances at four different locations have been detected and located simultaneously, which is the most effective detection system with the maximum detection capability reported to date, to the best of the authors’ knowledge. With same hardware conditions, more existing disturbances can be detected by using the new interrogation scheme, which is helpful to reduce the miss report of disturbance.

Details

Sensor Review, vol. 35 no. 4
Type: Research Article
ISSN: 0260-2288

Keywords

Book part
Publication date: 3 December 2014

Bernhard Freyer and Jim Bingen

In this chapter we discuss the dynamics of convergence-divergence between organic and non-organic farming systems. We are specifically interested in how and in what ways…

Abstract

In this chapter we discuss the dynamics of convergence-divergence between organic and non-organic farming systems. We are specifically interested in how and in what ways organic systems emerge into a new system that synthesizes the diverse qualities of competing systems. Or, will these systems continue to diverge because of their path dependencies and contradictory, unresolvable logics? Alternatively, are we confronted with conversion? Following a discussion of the origin of organic agriculture and the IFOAM Principles, we explore differentiation of two agricultural paradigms that was developed more than 20 years ago before the rise of GMOs. This comparison identifies the key features of both systems and a first interpretation on the potential of convergence-divergence. Third, we take a macro-look at agro-food chain that offers insights on the convergence-divergence potential in the context of global, economic, market, political, and societal dynamics. Fourth, we discuss convergence-divergence at the production level comparing the four agricultural systems. Finally, we reflect and assess on the explanatory potential of our study for the future development of organic and non-organic agriculture/farming. We conclude that there is more evidence for conversion than for convergence.

Details

Alternative Agrifood Movements: Patterns of Convergence and Divergence
Type: Book
ISBN: 978-1-78441-089-6

Article
Publication date: 6 October 2021

Daphnee Hui Lin Lee

Both Hong Kong and Singapore leverage teacher collaboration to improve student learning, but state reforms differ in how teacher collaborative capabilities are…

Abstract

Purpose

Both Hong Kong and Singapore leverage teacher collaboration to improve student learning, but state reforms differ in how teacher collaborative capabilities are prioritized. This paper provides a nuanced comparison of Hong Kong and Singapore teachers' values (risk-taking, power distance and uncertainty avoidance) to develop insights into how different policy focuses cultivate teachers' capabilities to focus on improving student learning.

Design/methodology/approach

Employing Hargreaves and Fullan's (2012) concept of professional capital, statistical analyses determine teachers' values profiles of high, medium and low professional capital in the respective contexts. Leveraging related research on Singapore teachers (Lee and Lee, 2018), nuances in teachers' values in the Hong Kong results are identified via cluster analysis and explained via structural equation modelling.

Findings

Medium professional capital Hong Kong teachers' values matched Singapore's, but teachers in other clusters are nuanced. Compared to Singapore teachers with similar levels of professional capital, high professional capital Hong Kong teachers have higher uncertainty avoidance, while low professional capital teachers are the opposite. In Hong Kong, high uncertainty avoidance values positively influence teacher leadership and focus on student learning. Nevertheless, as with their Singapore counterparts, high professional capital Hong Kong teachers have low power distance and high risk-taking values.

Originality/value

This paper raises awareness regarding policy's influence in cultivating teachers' values and their transformational change capabilities. By comparing two hierarchical Chinese societies, the discussion questions whether Chinese and Western cultural influences are mutually exclusive, and whether transformational change in cultural values, if achievable, is necessary.

Details

Journal of Professional Capital and Community, vol. 7 no. 2
Type: Research Article
ISSN: 2056-9548

Keywords

Article
Publication date: 25 June 2021

Linyan Liu and Yilei Wang

This paper aims to take International SPOrt (ISPO) as a typical case to study how exhibition organizers can reshape their relationship with users through business model…

Abstract

Purpose

This paper aims to take International SPOrt (ISPO) as a typical case to study how exhibition organizers can reshape their relationship with users through business model innovation to answer the question that how enterprises can help the exhibition industry to upgrade and develop through business model innovation in the internet environment.

Design/methodology/approach

Faced with the development of internet technology, the impact of online platforms, the relationship between exhibition organizers and their customers are facing unprecedented challenges. On the basis of the literature review, this study analyzed the innovation of exhibitors’ business model from three modules: value proposition, revenue logic and cost base and how to reshape their interaction with users through innovation. This study systematically analyzed the innovation of the ISPO business model and the process of reshaping its relationship with users and dynamic interaction with a single case study method.

Findings

The main conclusions are as follows: the starting point of reshaping the relationship between exhibition organizer and users in the internet era is to re-understand the needs of customers, the key point of reshaping the relationship is to further cultivate the industrial value and the sustainability of the relationship lies in the customer life cycle management.

Originality/value

From the perspective of exhibition organizers filling the gap of case study in the field of the exhibition. In the area of the exhibition, previous studies rarely started from the perspective of exhibition organizers, but, this paper discusses the interaction between exhibition organizers, exhibitors and visitors from this perspective in this study.

Details

Nankai Business Review International, vol. 12 no. 2
Type: Research Article
ISSN: 2040-8749

Keywords

Article
Publication date: 1 December 2020

Peng Liu

The aim of this study was to understand the relationship between teacher leadership and collective teacher efficacy in Chinese upper secondary schools.

Abstract

Purpose

The aim of this study was to understand the relationship between teacher leadership and collective teacher efficacy in Chinese upper secondary schools.

Design/methodology/approach

Based on survey answers from 1,074 upper secondary teachers in a Chinese city, path analysis was conducted to understand the relationship.

Findings

This study identified that a number of dimensions of teacher leadership (recognition, collegiality, participation and positive environment) had positive relationships with group competence. Meanwhile, the dimensions of developmental focus, participation and positive environment had positive relationships with task analysis. Additionally, when the authors treated collective efficacy as a single variable, the dimensions of developmental focus, congeniality, participation and positive environment had positive relationships with collective efficacy.

Originality/value

This study is to understand the relationship between teacher leadership and collective teacher efficacy in a collective culture and hierarchical education system.

Details

International Journal of Educational Management, vol. 35 no. 2
Type: Research Article
ISSN: 0951-354X

Keywords

Article
Publication date: 1 April 2003

Georgios I. Zekos

Aim of the present monograph is the economic analysis of the role of MNEs regarding globalisation and digital economy and in parallel there is a reference and examination…

61852

Abstract

Aim of the present monograph is the economic analysis of the role of MNEs regarding globalisation and digital economy and in parallel there is a reference and examination of some legal aspects concerning MNEs, cyberspace and e‐commerce as the means of expression of the digital economy. The whole effort of the author is focused on the examination of various aspects of MNEs and their impact upon globalisation and vice versa and how and if we are moving towards a global digital economy.

Details

Managerial Law, vol. 45 no. 1/2
Type: Research Article
ISSN: 0309-0558

Keywords

Article
Publication date: 18 October 2018

Nancy Bouranta, Evangelos Psomas and Fotis Vouzas

This study aims to focus on the food industry and empirically examine the mediating role of consumers’ perceived food safety on the relationship between a company’s…

Abstract

Purpose

This study aims to focus on the food industry and empirically examine the mediating role of consumers’ perceived food safety on the relationship between a company’s service recovery and customer loyalty. In addition, consumers’ demographic characteristics and their influences on the relationship between perceived food safety and customer loyalty are determined.

Design/methodology/approach

A survey was carried out through a structured questionnaire which was administered to the public. Using a small intercept interview, a random sample of 836 usable questionnaires was collected in Greece. Exploratory and confirmatory factor analyses were applied to validate the proposed constructs. The causal relationships among constructs were examined using structural equation modeling.

Findings

According to the findings, consumers’ perceived food safety partially mediates the effect of a company’s service recovery on customer loyalty. The socio-demographic profile of consumers (gender, marital and parenthood status) also significantly influences the underlying factors of product and the loyalty attributes.

Practical implications

This study enriches the existing literature of food safety by examining the distinct role that consumers’ perceptions play in forming loyalty, highlighting the importance of companies’ recovery efforts. The results obtained from this analysis offer a better understanding of consumer behavior toward food safety – encouraging and supporting food companies to successfully design their marketing strategies. Food safety issues also have become increasingly important in international trade, which makes it essential to understand consumer perceptions and behavior toward food safety.

Originality/value

This study fills the identified literature gap and contributes to the literature, as no previous study has examined the proposed relationships in the food sector, taking into consideration food safety issues.

Details

International Journal of Quality and Service Sciences, vol. 11 no. 1
Type: Research Article
ISSN: 1756-669X

Keywords

1 – 10 of 608