bluuebunny/crossref_metadata_2025_split huggingface dataset:
Genetic algorithm based cooling energy optimization of data centers
Authors: Athavale Jayati , Yoda Minami , Joshi Yogendra 
Published: February 2021

Purpose
This study aims to present development of genetic algorithm (GA)-based framework aimed at minimizing data center cooling energy consumption by optimizing the cooling set-points while ensuring that thermal management criteria are satisfied.

Design/methodology/approach
Three key components of the developed framework include an artificial neural network-based model for rapid temperature prediction (Athavale et al., 2018a, 2019), a thermodynamic model for cooling energy estimation and GA-based optimization process. The static optimization framework informs the IT load distribution and cooling set-points in the data center room to simultaneously minimize cooling power consumption while maximizing IT load. The dynamic framework aims to minimize cooling power consumption in the data center during operation by determining most energy-efficient set-points for the cooling infrastructure while preventing temperature overshoots.

Findings
Results from static optimization framework indicate that among the three levels (room, rack and row) of IT load distribution granularity, Rack-level distribution consumes the least cooling power. A test case of 7.5 h implementing dynamic optimization demonstrated a reduction in cooling energy consumption between 21%–50% depending on current operation of data center.

Research limitations/implications
The temperature prediction model used being data-driven, is specific to the lab configuration considered in this study and cannot be directly applied to other scenarios. However, the overall framework can be generalized.

Practical implications
The developed framework can be implemented in data centers to optimize operation of cooling infrastructure and reduce energy consumption.

Originality/value
This paper presents a holistic framework for improving energy efficiency of data centers which is of critical value given the high (and increasing) energy consumption by these facilities.
Assessment of vortex generator shapes for enhancing thermohydraulic performance of fluid flow in a channel equipped with perforated chevron plate-fin
Authors: Nejati Barzoki Faezeh , Sheikhzadeh Ghanbar Ali , Khoshvaght Aliabadi Morteza , Abbasian Arani Ali Akbar 
Published: February 2021

Purpose
The purpose of this paper is to investigate thermohydraulic characteristics of turbulent flow of water (4,000 = Re = 10,000) in a rectangular channel equipped with perforated chevron plat-fin (PCPF) with different vortex generators (VGs) shapes.

Design/methodology/approach
First, three general shapes of VGs including rectangular, triangular and half circle, are compared to each other. Then, the various shapes of rectangular VGs, (horizontal, vertical and square) and triangular VGs, (forward, backward and symmetric) are evaluated. To comprehensively evaluate the thermohydraulic performance of the PCPF with various VG shapes, the relationship between the Colburn factor and the friction factor (j/f) is presented, then a performance index (η) is applied using these factors.

Findings
Results show that the enhanced models of the PCPF, which are equipped with VGs, have higher values of j/f ratio and η as compared with the reference model (R). Further, the half-circle VG with the lowest pressure drop values (about 2.4% and 4.9%, averagely as compared with the S and ST vortex generators), shows the highest thermohydraulic performance among the proposed shapes. The maximum of performance index of 1.14 is found for the HC vortex generator at Re = 4,000. It is also found that the square and forward triangular VGs, have the best thermohydraulic performance among the rectangular and triangular VGs respectively and the highest performance index of 1.13 and 1.11 are reported for these VGs.

Originality/value
The thermohydraulic performance of the PCPF with different vortex generators VGs shapes have been investigated.
Digital tools to promote remote lesson study
Authors: Weaver Joanna C. , Matney Gabriel , Goedde Allison M. , Nadler Jeremy R. , Patterson Nancy 
Published: February 2021

PurposeThe authors propose that a digital instructional delivery format of lesson study (LS) may have the potential to amplify particular aspects of traditional, face-to-face LS.Design/methodology/approachThis is a qualitative case study, using data triangulation, member checking and an inductive approach to open-coding utilizing grounded theory to identify codes and themes.FindingsDigital tools promoted LS and learning, allowing for rigorous collaboration, synchronous observations, data collection and feedback, leading to deeper understanding.Research limitations/implicationsDigital tools used in the online LS process changed how instructional planning can be researched, analyzed and written collaboratively and impacted the fluidity of a lesson, the ease of observation and reflection, student engagement and the researchers' and students' ability to share ideas in real time.Practical implicationsLS can be integrated into online teacher education programs to engage students in online learning and promotes engagement, peer interaction and student voice. The use of these digital tools is not restricted just to remote instructional contexts.Social implicationsLS reduces teacher isolation, builds a collaborative community of teachers and increases instructional motivation. Educators across schools, universities or districts can integrate online LS into remote teacher education programs and online courses.Originality/valueThis study is original work that has not been published elsewhere.
Coaching in the time of coronavirus 2019: how simulations spark reflection
Authors: Wernick Ann Marie , Conry Jillian Marie , Ware Paige Daniel 
Published: February 2021

PurposeThis study investigates how debrief conversations unfold during virtual coaching sessions that provide embedded opportunities to practice teaching within a mixed reality simulation (MRS). We examine how teacher and coach topical episodes function (agreeing, explaining, clarifying, probing, recapping, reflecting and suggesting) to activate reflection as part of virtual coaching.Design/methodology/approachGrounded in Vygotsky's sociocultural theory and the belief that learning is collaborative and impacts how pre- and in-service teachers construct knowledge, this exploratory case study draws on insights from 15 graduate students (5 pre-service teachers (PSTs) and 10 in-service teachers (ISTs)) who participated in virtual coaching with embedded practice opportunities. Data sources were video recordings and transcripts of 15 virtual coaching sessions, and one-on-one postcoaching interviews. Coding categories were determined through the constant comparative analysis method.FindingsFindings indicate that an MRS provides an immediate context for reflection, which guided the debrief conversations. Additionally, functions occurred with varying frequency among PSTs and ISTs, and across both groups, probing questions often led directly to reflecting and recapping the shared simulation context.Research limitations/implicationsThis study had a small sample (n = 15) and the use of an MRS, while widely used, is not necessarily a scalable practice.Originality/valueIn times of remote teaching, like during corona virus 2019 (COVID-19), opportunities to simulate clinical experiences become vital. With a limited research base, learning how teachers engage with and learn from simulated experiences is a key to creating rich learning opportunities for teachers.
An active control for hydrostatic journal bearing using optimization algorithms
Authors: Ur Rehman Waheed , Wang Xinhua , Chen Yingchun , Yang Xiaogao , Ullah Zia , Cheng Yiqi , Kanwal Marya 
Published: February 2021

Purpose
The purpose of this paper is to improve static/dynamic characteristics of active-controlled hydrostatic journal bearing by using fractional order control techniques and optimizing algorithms.

Design/methodology/approach
Active lubrication has ability to overcome the unpredictable harsh environmental conditions which often lead to failure of capillary controlled traditional hydrostatic journal bearing. The research develops a mathematical model for a servo feedback-controlled hydrostatic journal bearing and dynamics of model is analyzed with different control techniques. The fractional-order PID control system is tuned by using particle swarm optimization and Nelder mead optimization techniques with the help of using multi-objective performance criteria.

Findings
The results of the current research are compared with previously published theoretical and experimental results. The proposed servo-controlled active bearing system is studied under a number of different dynamic situations and constraints of variable spindle speed, external load, temperature changes (viscosity) and variable bearing clearance (oil film thickness). The simulation results show that the proposed system has better performance in terms of controllability, faster response, stability, high stiffness and strong resistance.

Originality/value
This paper develops an accurate mathematical model for servo-controlled hydrostatic bearing with fractional order controller. The results are in excellent agreement with previously published literature.

Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2020-0272
Cybersecurity awareness training programs: a cost–benefit analysis framework
Authors: Zhang Zuopeng (Justin) , He Wu , Li Wenzhuo , Abdous M'Hammed 
Published: February 2021

PurposeEmployees must receive proper cybersecurity training so that they can recognize the threats to their organizations and take the appropriate actions to reduce cyber risks. However, many cybersecurity awareness training (CSAT) programs fall short due to their misaligned training focuses.Design/methodology/approachTo help organizations develop effective CSAT programs, we have developed a theoretical framework for conducting a cost–benefit analysis of those CSAT programs. We differentiate them into three types of CSAT programs (constant, complementary and compensatory) by their costs and into four types of CSAT programs (negligible, consistent, increasing and diminishing) by their benefits. Also, we investigate the impact of CSAT programs with different costs and the benefits on a company's optimal degree of security.FindingsOur findings indicate that the benefit of a CSAT program with different types of cost plays a disparate role in keeping, upgrading or lowering a company's existing security level. Ideally, a CSAT program should spend more of its expenses on training employees to deal with the security threats at a lower security level and to reduce more losses at a higher security level.Originality/valueOur model serves as a benchmark that will help organizations allocate resources toward the development of successful CSAT programs.
Digital labour platforms in Pakistan: institutional voids and solidarity networks
Authors: Malik Fareesa , Heeks Richard , Masiero Silvia , Nicholson Brian 
Published: February 2021

PurposeWhile digital labour platforms are being increasingly studied across the Global South, the existing literature does not conceptualise the theoretical link between such platforms and socio-economic development. This paper theorises such a link drawing on the notion of institutional voids defined, as in Khanna and Palepu (2010), as “the absence of intermediaries to efficiently connect buyers and sellers” in an economy. We frame digital labour platforms as means to fill institutional voids, seeking to create “development” in the form of earning opportunities in contexts of deprivation.Design/methodology/approachWe draw on an interpretive case study of an online work training project in a deprived region of Pakistan, where members of marginalised communities were trained to become freelancers for global digital labour platforms. We use the notion of market-enabling institutions aimed at filling institutional voids as a lens to study the project's declared goals, examining the extent to which these were met in practice for the workers who participated in the training.FindingsOur analysis reveals three types of market-enabling institutions–credibility enhancers, aggregators and distributors, and transaction facilitators–through which digital labour platforms seek to fill institutional voids. However, workers' narratives reveal that institutional voids are only partially filled by these platforms, and their perpetuation results in diverse forms of power asymmetries leveraged by clients and owners of the platforms. We also observe the formation of solidarity networks among workers, networks that are intra-familial and societal rather than characterised by formal unionisation.Originality/valueThe paper offers a novel perspective to theorise the link between digital labour and socio-economic development. Applying such a perspective in a Global South context, it also finds the limits of the digital platforms' institutional void-filling potential, highlighting the emergence of power asymmetries and the emerging formation of worker solidarity networks.
Adoption impact of maize seed technology on farm profitability: evidence from Ghana
Authors: Mensah Amos , Asiamah Maxwell , Wongnaa Camillus Abawiera , Adams Faizal , Etuah Seth , Gaveh Eli , Appiah Patrick 
Published: February 2021

PurposeThe paper aims to examine impact of adopted maize seed technology on farm profitability. It assesses both the revenue and cost implication of the adopted technology on farmers' welfare. The study aims to expand the domain of farm investment assessment analysis by including a broader range of production outcome indicators than is normally found in the adoption impact on farm profitability literature.Design/methodology/approachThe paper opted for an empirical study using field survey data. A structured questionnaire was used to interview 400 maize farmers across four regions of Ghana. The survey was complemented with focus group discussions in each region with participants representing male and female farmers cultivating maize on a commercial basis. The data captured detail household level (i.e. demographic and socioeconomic characteristics) as well as farm-level information on maize production (i.e. input use and farm output).FindingsThe paper provides empirical insights about maize farmers' perception on the adopted maize seed technology and the factors influencing adoption. It also shed light on the fact that maize farmers do not base their adoption decisions solely on farm output and revenue indicators alone, but mainly on the return on their investment and the cost associated with the maize seed technology adopted.Research limitations/implicationsBecause of data limitation, the influence of some important actors (market power) could not be directly captured in the analysis; this may lead to over simplification of a very complex situation in the maize sector. Therefore, researchers are encouraged to future investigate the influence of such important phenomenon on farm profitability.Social implicationsImproving maize productivity and farm profitability across the sectors is important in order to improve farmer income. This study, therefore, highlights the effect of adopted seed technology and its impact on farm profitability.Originality/valueThis paper fulfils an identified need to study how investment cost in maize seed technology affect farm profitability.
Vertical coordination in the Chinese grape market
Authors: Bitsch Linda , Li Shuo , Hanf Jon H. 
Published: February 2021

PurposeRegarding the global development of the wine industry, China has gained a notable share in terms of wine consumption, and its domestic wine production has increased steadily since 2000. The wine production process requires close coordination between growers and processors to avoid disruption and instability in the supply chain of the wine grapes. However, vertical coordination in the Chinese wine regions has received little attention. Based on the existing theoretical background on vertical coordination, this study aims to detect the evolution processes of vertical coordination in the Chinese grape market.Design/methodology/approachExploratory qualitative research fits with the aim of this study. From December 2018 to January 2019, interviews with grape growers and wine processors of various Chinese wine-producing areas took place. After transcribing all recorded files into text, a qualitative data analysis following the approach of Mayring (2015) was used to analyse and interpret the data.FindingsThe models of vertical coordination in the grape supply in China vary between the producer's requirements on grape quality/quantity and the arrangements of grape supply chains, which are diverse depending on regional strategies of the local government.Research limitations/implicationsHowever, in this research, the authors did not get into details on the organization of the contractual coordination, and due to the limited access to grape growers, the relationship between farmers and processors cannot be analysed in detail. With a better understanding of the coordination relationship and enhanced contract enforcement, the vineyard management and grape supply chain management can be better performed, inducing a steady industrial development.Originality/valueRegarding the global development of the wine industry, China has gained a notable share in terms of wine consumption, and its domestic wine production has increased steadily since 2000. However, vertical coordination in the Chinese wine regions has received little attention. The study provides a first insight into the grape market structures, as very little is known.
Knowing new managerial directions: the role of AIS
Authors: Rizza Carmela , Ruggeri Daniela 
Published: February 2021

Purpose
This paper aims to better understand how an accounting information system (AIS), working as a multidimensional knowledge object, engages users in a new round of knowledge development which allows them to explore new managerial directions. Drawing on the concept of the knowledge object and the knowing in practice perspective, this study considers the relationships between subjects and objects in the explication of accounting practice, underlining how AIS could become a knowledge object that can assume a variety of forms, starting from such contradictions emerging from practice.

Design/methodology/approach
Theoretical argumentations are applied to a case study at a global logistics provider in the South of Italy, which manages the supply chain from origin to destination, offering a multitude of services in the transport and distribution sector.

Findings
The case study shows that the process of knowledge accumulation promotes the mutation of AIS into a knowledge object that, in its variety of forms, allows managers to explore new managerial directions such as the reorganization of warehouse activities.

Originality/value
The paper seeks to enrich the interpretation of AIS as a multidimensional knowledge object becoming a catalyst of new managerial directions through knowing. That helps to understand the role of accounting tools as a social practice supporting decision-making and how accounting systems’ openness and questioning nature makes them objects of enquiry able to support the identification of new managerial directions and lead the AIS to continually explode and mutate into something else.
Making internationalization of higher education a national strategic focus
Authors: Garwe Evelyn Chiyevo , Thondhlana Juliet 
Published: February 2021

PurposeThis paper contributes to knowledge on the internationalization of higher education (HE) through presenting a “lived” experience on how to optimize internationalization outcomes through national internationalization policy development.Design/methodology/approachThis paper uses a case study of Zimbabwe to qualitatively chart a strategic focus to internationalization through incorporating the theory of change (ToC) approach to national (government) policy development.FindingsThe paper details the context, challenges, rationales, approaches, priorities and processes that guided IHE policy development in Zimbabwe. It underscores the importance of baseline research and benchmarking in propelling an evidence-based and participatory approach to IHE policy development.Research limitations/implicationsThe methodology and framework used here makes it possible to draw comparisons in similar settings in a way that enables a more holistic understanding of the complexities and practicalities of national internationalization policy development.Practical implicationsThe study can assist nations to take a strategic approach to guide institutional internationalization responses. In doing so, researchers and HE stakeholders in similar national contexts can learn valuable lessons from the study.Social implicationsInternationalization is increasingly becoming a policy imperative for HE in pursuit of quality as well as fostering sustainable national development (Craciun, 2018). Higher education institutions (HEIs) are recognized as key drivers of sustainable national and international development through the production of quality graduates with “global competencies.”Originality/valueThe study contributes to the growing research interest on strategic approaches to internationalization targeting specific national experiences.
Introducing sharing-focused business models in the B2B context: comparing interaction and environmental sustainability for selling, renting and sharing on industrial markets
Authors: Melander Lisa , Arvidsson Ala 
Published: February 2021

Purpose
The purpose of this study is to investigate the sales-, rental- and sharing-focused business models for industrial markets by analysing interactions and environmental sustainability efforts within them.

Design/methodology/approach
Case studies are conducted at two world-leading manufacturing firms of complex industrial products. The analysis compares how interaction takes place in sales-, rental- and sharing-focused business models in industrial markets for high-technology products in connection with environmental sustainability outcomes.

Findings
The findings show the need for different interaction patterns in sales-, rental- and sharing-focused business models at firm, relationship and network levels. The implementation of sharing-focussed business models requires new interactions with actors within firms, between firms and key collaborators and in networks. The firms in our study have made a wide range of efforts to improve the environmental sustainability of their products. Sharing-focused business models have the potential to be environmentally sustainable if products can be shared among customers. However, under-usage of products and the increased need to transport them may reduce environmental sustainability.

Originality/value
This study reveals that although manufacturing firms and customers are willing to implement sharing-focused business models, there are obstacles to achieving the expected environmental sustainability associated with this business model. These are due to the high-technology nature and level of customisation of the associated firms’ products and services, which make it difficult to share resources across firms without advanced adaptations to products such as re-programming. This study contributes to the sharing-focused business model literature for the business-to-business context, by pointing to the pivotal role partnerships with new actors and closer collaboration with existing actors in supply chains can play in enabling sharing-focused business models in the future.