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1 – 10 of 65Hristo Trifonov and Donal Heffernan
The purpose of this paper is to describe how emerging open standards are replacing traditional industrial networks. Current industrial Ethernet networks are not interoperable;…
Abstract
Purpose
The purpose of this paper is to describe how emerging open standards are replacing traditional industrial networks. Current industrial Ethernet networks are not interoperable; thus, limiting the potential capabilities for the Industrial Internet of Things (IIoT). There is no forthcoming new generation fieldbus standard to integrate into the IIoT and Industry 4.0 revolution. The open platform communications unified architecture (OPC UA) time-sensitive networking (TSN) is a potential vendor-independent successor technology for the factory network. The OPC UA is a data exchange standard for industrial communication, and TSN is an Institute of Electrical and Electronics Engineers standard for Ethernet that supports real-time behaviour. The merging of these open standard solutions can facilitate cross-vendor interoperability for Industry 4.0 and IIoT products.
Design/methodology/approach
A brief review of the history of the fieldbus standards is presented, which highlights the shortcomings for current industrial systems in meeting converged traffic solutions. An experimental system for the OPC UA TSN is described to demonstrate an approach to developing a three-layer factory network system with an emphasis on the field layer.
Findings
From the multitude of existing industrial network schemes, there is a convergence pathway in solutions based on TSN Ethernet and OPC UA. At the field level, basic timing measurements in this paper show that the OPC UA TSN can meet the basic critical timing requirements for a fieldbus network.
Originality/value
This paper uniquely focuses on the specific fieldbus standards elements of industrial networks evolution and traces the developments from the early history to the current developing integration in IIoT context.
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Laura M. Oliver and Kae Reynolds
The recent financial crisis has brought business ethics issues to the forefront. While most colleges have formal training in business ethics, a person’s ethical standards have…
Abstract
The recent financial crisis has brought business ethics issues to the forefront. While most colleges have formal training in business ethics, a person’s ethical standards have often developed before college age. This application brief proposes using digital popular media to teach servant-leadership principles to public school adolescents. The purpose is to illustrate the advantage of using secular content from the television series Merlin (Wilkie, 2008) to demonstrate an ethics-based leadership perspective through a medium that is accessible to the virtual/video generation.
Sudipta Kumar Nanda and Parama Barai
This paper investigates if investors consider legal insider trading data while making investment decisions. If any investment decision is based on insider transactions, then it…
Abstract
Purpose
This paper investigates if investors consider legal insider trading data while making investment decisions. If any investment decision is based on insider transactions, then it will result in abnormal stock characteristics. The purpose of this paper is to investigate if insider trading affects stock characteristics like price, return and volume. The paper further investigates the effect on stock characteristics after the trade of different types of insiders and the relationship between abnormal return and abnormal volume.
Design/methodology/approach
The study uses the event study method to measure the abnormal price, return and volume. Two-stage least square regression is used to investigate the relationship between abnormal return and abnormal volume.
Findings
The insider trades affect price, return and volume. The results are identical for both buy and sell transactions. The trades of different types of insiders have diverse effects on stock characteristics. The trades of substantial shareholders give rise to the highest abnormal price and return, whereas the promoters' trades result in the highest abnormal volume. No relationship is detected between abnormal return and volume.
Originality/value
A novel method to calculate the abnormal price is proposed. The effect of trading of all types of insiders on stock characteristics is analyzed. The relationship between abnormal return and abnormal volume, after an insider trade, is investigated.
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Aicha Gasmi, Marc Heran, Noureddine Elboughdiri, Lioua Kolsi, Djamel Ghernaout, Ahmed Hannachi and Alain Grasmick
The main purpose of this study resides essentially in the development of a new tool to quantify the biomass in the bioreactor operating under steady state conditions.
Abstract
Purpose
The main purpose of this study resides essentially in the development of a new tool to quantify the biomass in the bioreactor operating under steady state conditions.
Design/methodology/approach
Modeling is the most relevant tool for understanding the functioning of some complex processes such as biological wastewater treatment. A steady state model equation of activated sludge model 1 (ASM1) was developed, especially for autotrophic biomass (XBA) and for oxygen uptake rate (OUR). Furthermore, a respirometric measurement, under steady state and endogenous conditions, was used as a new tool for quantifying the viable biomass concentration in the bioreactor.
Findings
The developed steady state equations simplified the sensitivity analysis and allowed the autotrophic biomass (XBA) quantification. Indeed, the XBA concentration was approximately 212 mg COD/L and 454 mgCOD/L for SRT, equal to 20 and 40 d, respectively. Under the steady state condition, monitoring of endogenous OUR permitted biomass quantification in the bioreactor. Comparing XBA obtained by the steady state equation and respirometric tool indicated a percentage deviation of about 3 to 13%. Modeling bioreactor using GPS-X showed an excellent agreement between simulation and experimental measurements concerning the XBA evolution.
Originality/value
These results confirmed the importance of respirometric measurements as a simple and available tool for quantifying biomass.
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Walter S. DeKeseredy, Danielle M. Stoneberg and Gabrielle L. Lory
Polyvictimization means looking at multiple victimizations of different kinds that one person has experienced. Virtually, all of the work in this field focuses on the effects of…
Abstract
Polyvictimization means looking at multiple victimizations of different kinds that one person has experienced. Virtually, all of the work in this field focuses on the effects of childhood trauma and victimization on currently distressed children, and empirical and theoretical work on the intertwining of adult female offline and online abuse experiences is in short supply. Recently, however, some scholars are starting to fill these research gaps by generating data showing that technology-facilitated violence and abuse are part and parcel of women's polyvictimization experiences at institutions of higher education. This chapter provides an in-depth review of the extant social scientific literature on the role technology-facilitated violence and abuse plays in the polyvictimization of female college/university students. In addition to proposing new ways of knowing, we suggest progressive policies and practices aimed at preventing polyvictimization on the college campus.
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Summer F. Odom, Holly D. Jarvis, M’Randa R. Sandlin and Cassidy Peek
Social media is becoming more prevalent in the higher education classroom. As part of an ongoing study, the Department of Agricultural Leadership, Education, and Communications at…
Abstract
Social media is becoming more prevalent in the higher education classroom. As part of an ongoing study, the Department of Agricultural Leadership, Education, and Communications at Texas A&M University surveyed leadership students about their perceptions of their level of comfort and frequency of use of social media tools and the advantages and disadvantages that these students perceived when social media was used in the leadership classroom. A total of 79 students were surveyed in two upper level leadership courses. Facebook was the social media tool students were most comfortable with and used most frequently. Advantages included social media helping increase quality and efficiency of communication between students and the instructor, social media as a technological norm, access to class information, ease of collaboration, and stronger social connections between classmates. Disadvantages revolved around issues of use of and access to social media.
Eric Buschlen, Tzu-Fen Chang and Dena R. Kniess
Providing leadership education for young men growing up without their father, through a structured curriculum and mentoring program, should enhance their development. To examine…
Abstract
Providing leadership education for young men growing up without their father, through a structured curriculum and mentoring program, should enhance their development. To examine this, the authors interviewed adult alumni who participated as adolescents in a cohort-based, sixmonth leadership program. Interviews outlined several key themes: once served by others the young men desired to serve their community, choosing an authentic leadership educator matters, program mentors inspired positive life changes, and the learned leadership lessons transcended the setting and the curriculum. This qualitative project examined the efficacy of a youth leadership development program by interviewing past participants. This research outlined how service to others can inspire more service and that leadership education has the potential to alter lives, and in this case, even save lives.