Shufang Yang, Lin Huang, Yanli Zhang, Pengzhu Zhang and Yuxiang Chris Zhao
The literature reports inconsistent findings about the effects of social media usage (SMU). Researchers distinguish between active and passive social media usage (ASMU and PSMU)…
Abstract
Purpose
The literature reports inconsistent findings about the effects of social media usage (SMU). Researchers distinguish between active and passive social media usage (ASMU and PSMU), which can generate different effects on users by social support and social comparison mechanisms, respectively. Drawing on social presence theory (SPT), this study integrates an implicit social presence mechanism with the above two mechanisms to explicate the links between SMU and seniors' loneliness.
Design/methodology/approach
Data were collected from a field study by interviewing seniors living in eight aging care communities in China. Loneliness, social media activities and experiences with social media in terms of online social support (OSS), upward social comparison (USC) and social presence (SP) were assessed. Factor-based structural equation modeling was used to analyze the data.
Findings
OSS can mediate the relationship between ASMU and seniors' loneliness. Moreover, SP mediates between ASMU, PSMU, and seniors' loneliness, and between OSS, USC and seniors' loneliness. OSS mediates the relationship between ASMU and SP, and USC mediates the relationship between PSMU and SP.
Practical implications
This study shows that social media can alleviate seniors' loneliness, which could help relieve the pressures faced by health and social care systems. Social presence features are suggested to help older users interact with social health technologies in socially meaningful ways.
Originality/value
This study not only demonstrates that SP can play a crucial role in the relationship between both ASMU and PSMU and loneliness, but also unravels the links between SP and OSS, as well as USC.
Details
Keywords
Zhijun Yan, Roberta Bernardi, Nina Huang and Younghoon Chang
Yan Wang, Rong Dai, Shufang Xu and Li Luo
This paper aims to analyze the inhibitory effect of non-controlling shareholders governance mechanism on the retention of self-interest management, which provides theoretical…
Abstract
Purpose
This paper aims to analyze the inhibitory effect of non-controlling shareholders governance mechanism on the retention of self-interest management, which provides theoretical support and practical basis for standardizing the control transfer behavior of listed companies and improving the governance mechanism of non-controlling shareholders.
Design/methodology/approach
Taking A-share listed companies with control transfer from 2000 to 2017 as sample, this paper investigates the strategy, path and retention consequence of the target company’s market selected top management who collude with the new controlling shareholder to avoid the risk of being taken over by control transfer.
Findings
This research explores that negative earnings management behavior may reduce the real premium of control transfer after deducting the “shell value”. The lower the real premium of control transfer after deducting the “shell value”, the higher the probability of management retention after control transfer. This paper also reveals that the real premium of control transfer after deducting the “shell value” plays complete mediation role between the negative earnings management behavior of the management and their own retention. The mediation effect of “collusion and price reduction” in the control transfer will be inversely moderated by the governance mechanism of noncontrolling shareholders including the old shareholders of the seller.
Originality/value
This paper not only constitutes a supplement to the existing literature but also provides empirical evidence for standardizing the control transfer behavior of listed companies, and making good use of the old shareholders of the seller to improve corporate governance and alleviate agency conflict after control transfer.
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Zhao Wang, Yuefeng Li, Jun Zou, Bobo Yang and Mingming Shi
The purpose of this paper is to investigate the effect of different soldering temperatures on the performance of chip-on-board (COB) light sources during vacuum reflow soldering.
Abstract
Purpose
The purpose of this paper is to investigate the effect of different soldering temperatures on the performance of chip-on-board (COB) light sources during vacuum reflow soldering.
Design/methodology/approach
First, the influence of the void ratio of the COB light source on the steady-state voltage, luminous flux, luminous efficiency and junction temperature has been explored at soldering temperatures of 250°C, 260°C, 270°C, 280°C and 290°C. The COB chip has also been tested for practical application and aging.
Findings
The results show that when the soldering temperature is 270°C, the void ratio of the soldering layer is only 5.1%, the junction temperature of the chip is only 76.52°C, and the luminous flux and luminous efficiency are the highest, and it has been observed that the luminous efficiency and average junction temperature of the chip are 107 lm/W and 72.3°C, respectively, which meets the requirements of street lights. After aging for 1,080 h, the light attenuation is 84.64% of the initial value, which indicates that it has higher reliability and longer life.
Originality/value
It can provide reference data for readers and people in this field and can be directly applied to practical engineering.
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Roberta (Robin) Sullivan, Cynthia A. Tysick, Beth Pilawski, Shufang Shi Strause, Cherie van Putten and Nathan Whitley-Grassi
University and college students are fully immersed in a participatory, interactive, digital culture that permeates every aspect of their lives. Today’s educators must find ways to…
Abstract
University and college students are fully immersed in a participatory, interactive, digital culture that permeates every aspect of their lives. Today’s educators must find ways to integrate educational technology into their curriculum to fully engage their students in the learning process. The difficulty for educators is vetting educational technologies for pedagogical effectiveness and devoting time to work with them prior to classroom integration. Those responsible for creating faculty professional development training opportunities will find self-directed online learning modules coupled with a virtual learning community an effective training tool. Structured inquiry-based learning, which relies on self-direction, curiosity, and knowledge creation, serves as the framework for such professional development efforts. Faculty and staff from 10, public institutions in New York State created an inquiry-based, self-directed, learning community called Tools of Engagement Project (TOEP). The goal was to help faculty and staff identify and master Web 2.0 tools relevant to their teaching needs for integration into their skill set. Approximately 300 faculty and staff from across these 10 institutions met in a virtual environment during a four-month period to actively engage in a collegial, online community where they were encouraged by mentors and fellow participants to learn about Web 2.0 tools. Results of pre- and post-surveys and participants’ comments have shown this self-directed format to be an effective professional development training tool. The pace of TOEP and the differential teaching and learning aspect of the modules have helped faculty and staff who struggle to find the time to integrate these pervasive technologies into their teaching practice.
Xiao Xue, Shufang Wang and Hao Chao
The purpose of this paper is to provide strong theoretical and technical support for the dynamic evolution of service system in “Cluster Supply Chain”(CSC), which can deal with…
Abstract
Purpose
The purpose of this paper is to provide strong theoretical and technical support for the dynamic evolution of service system in “Cluster Supply Chain”(CSC), which can deal with two kinds of context changes: the internal service component changes and the external customer requirement changes.
Design/methodology/approach
A “feedback-based” evolution mechanism of service system for CSC is proposed in this study. By means of the feedback update of enterprise service’s Quality of Service (QoS) attribute and the adjustment of the assumed QoS evaluation model, the evolution of service system can be achieved to suit the dynamic market demands.
Findings
Results of the study suggest: by means of the “feed-back” evolution mechanism of service system, the enterprises in CSC can handle the context changes effectively to maintain the optimized operation status.
Practical implications
The implementation of evolution mechanism in service system can keep the effectiveness of enterprise service composition to face the frequent service component changes and the unpredictable market turbulence.
Originality/value
This paper proposes a method to realize the autonomous evolution of service system in CSC, which can support the flexibility and adaptability of enterprise service composition in the changing environment.
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Keywords
Wanbin Pan, Hongyi Jiang, Shufang Wang, Wen Feng Lu, Weijuan Cao and Zhenlei Weng
This paper aims to detect the printing failures (such as warpage and collapse) in material extrusion (MEX) process effectively and timely to reduce the waste of printing time…
Abstract
Purpose
This paper aims to detect the printing failures (such as warpage and collapse) in material extrusion (MEX) process effectively and timely to reduce the waste of printing time, energy and material.
Design/methodology/approach
The approach is designed based on the frequently observed fact that printing failures are accompanied by abnormal material phenomena occurring close to the nozzle. To effectively and timely capture the phenomena near the nozzle, a camera is delicately installed on a typical MEX printer. Then, aided by the captured phenomena (images), a smart printing failure predictor is built based on the artificial neural network (ANN). Finally, based on the predictor, the printing failures, as well as their types, can be effectively detected from the images captured by the camera in real-time.
Findings
Experiments show that printing failures can be detected timely with an accuracy of more than 98% on average. Comparisons in methodology demonstrate that this approach has advantages in real-time printing failure detection in MEX.
Originality/value
A novel real-time approach for failure detection is proposed based on ANN. The following characteristics make the approach have a great potential to be implemented easily and widely: (1) the scheme designed to capture the phenomena near the nozzle is simple, low-cost, and effective; and (2) the predictor can be conveniently extended to detect more types of failures by using more abnormal material phenomena that are occurring close to the nozzle.