The job rotation scheduling problem considering human cognitive effects: an integrated approach

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ashkan Ayough ◽  
Farbod Farhadi ◽  
Mostafa Zandieh
Keyword(s):  
Sensitivity Analysis ◽  
Optimization Model ◽  
Design Methodology ◽  
Heuristic Algorithms ◽  
Job Rotation ◽  
Content Type ◽  
Input Parameters ◽  
Job Rotation Scheduling ◽  
The Impact ◽  
First Time

Purpose This paper aims to unfold the role that job rotation plays in a lean cell. Unlike many studies, the authors consider heterogeneous operators with dynamic performance factor that is impacted by the assignment and scheduling decisions. The purpose is to derive an understanding of the underlying effects of job rotations on performance metrics in a lean cell. The authors use an optimization framework and an experimental design methodology for sensitivity analysis of the input parameters. Design/methodology/approach The approach is an integration of three stages. The authors propose a set-based optimization model that considers human behavior parameters. They also solve the problem with two meta-heuristic algorithms and an efficient local search algorithm. Further, the authors run a post-optimality analysis by conducting a design of experiments using the response surface methodology (RSM). Findings The results of the optimization model reveal that the job rotation schedules and the human cognitive metrics influence the performance of the lean cell. The results of the sensitivity analysis further show that the objective function and the job rotation frequencies are highly sensitive to the other input parameters. Based on the findings from the RSM, the authors derive general rules for the job rotations in a lean cell given the ranges in other input variables. Originality/value The authors integrate the job rotation scheduling model with human behavioral and cognitive parameters and formulate the problem in a lean cell for the first time in the literature. In addition, they use the RSM for the first time in this context and offer a post-optimality analysis that reveals important information about the impact of the job rotations on the performance of operators and the entire working cell.

COVID-19 news in USA and in China: Which is suitable in explaining the nexus among Bitcoin and Gold?

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Abdelkader Derbali ◽  
Kamel Naoui ◽  
Lamia Jamel
Keyword(s):  
Design Methodology ◽  
Conditional Heteroskedasticity ◽  
Conditional Correlation ◽  
Predictive Capacity ◽  
Content Type ◽  
Dynamic Conditional Correlation ◽  
The Hours ◽  
Important Correlation ◽  
The Impact ◽  
First Time

Purpose The purpose of this paper is to examine empirically the impact of COVID-19 pandemic news in USA and in China on the dynamic conditional correlation between Bitcoin and Gold. Design/methodology/approach This paper offers a crucial viewpoint to the predictive capacity of COVID-19 surprises and production pronouncements for the dynamic conditional correlation (DCC) among Bitcoin and Gold returns and volatilities using generalized autoregressive conditional heteroskedasticity-DCC-(1,1) through the period of study since July 1, 2019 to June 30, 2020. To assess the unexpected impact of COVID-19, this study pursues the Kuttner’s (2001) methodology. Findings The empirical findings indicate strong important correlation among Bitcoin and Gold if COVID-19 surprises are integrated in variance. This study validates the financialization hypothesis of Bitcoin and Gold. The correlation between Bitcoin and Gold begin to react significantly further in the case of COVID-19 surprises in USA than those in China. Originality/value This paper contributes to the literature on assessing the impact of COVID-19 confirmed cases surprises on the correlation between Bitcoin and Gold. This paper gives for the first time an approach to capture the COVID-19 surprise component. Also, this study helps to improve financial backers and policymakers' comprehension of the digital currencies' market elements, particularly in the hours of amazingly unpleasant and inconspicuous occasions.

On the impact of market mergers over herding: evidence from EURONEXT

2014 ◽  
Vol 6 (2) ◽  
pp. 104-135 ◽  
Author(s):  
Panagiotis Andrikopoulos ◽  
Andreas Albin Hoefer ◽  
Vasileios Kallinterakis
Keyword(s):  
Risk Factors ◽  
Design Methodology ◽  
Market Volatility ◽  
Herd Behavior ◽  
Content Type ◽  
Common Risk Factors ◽  
The Impact ◽  
First Time ◽  
European Equity ◽  
Insight Into

Purpose – The purpose of this paper is to present and empirically test for the first time the hypothesis that herding in a market increases following the market's merger in an exchange group. Design/methodology/approach – The hypothesis is tested empirically in EURONEXT's four European equity markets (Belgium, France, the Netherlands and Portugal) on the premise of the Hwang and Salmon (2004) measure which allows us insight into the significance, structure and evolution of market herding. Tests are conducted for each market for the period prior to and after its merger into EURONEXT, controlling for a series of variables (market conditions, common risk factors, size) to gauge the robustness of the findings. Findings – Results indicate that, with the exception of Portugal, herding grows in significance, yet declines in momentum post-merger. The authors ascribe the findings to EURONEXT's enhanced transparency (which makes it easier for investors to observe their peers’ trades, thus allowing them to infer and free-ride on their information) and its fast-moving informational dynamics that render herding movements shorter-lived. These results are robust when controlling for various market states and common risk factors, with deviations being observed when controlling for size and market volatility. Originality/value – The study presents results for the first time on the impact of exchange mergers on herd behavior. The authors believe these to constitute useful stimulus for further research on the issue and bear important implications for regulators/policymakers in view of the ongoing proliferation of exchange mergers that has been underway since the 1990s.

scholarly journals Triage: line or nets? Early intervention and the youth justice system

2014 ◽  
Vol 13 (4) ◽  
pp. 147-160 ◽  
Author(s):  
Sarah Soppitt ◽  
Adele Irving
Keyword(s):  
Restorative Justice ◽  
Justice System ◽  
Design Methodology ◽  
Qualitative Data ◽  
Youth Justice ◽  
Content Type ◽  
The Impact ◽  
First Time

Purpose – The purpose of this paper is to present a discussion of the value of early diversion schemes, underpinned by the principles of restorative justice (RJ), for First Time Entrants (FTEs) into the criminal justice system (CJS). Design/methodology/approach – The paper focuses specifically on the findings of a 12-month study into the introduction of “Triage” by one Youth Offending Team (YOT) in the northeast of England. Findings – Re-offending data suggested that Triage is more effective in reducing re-offending than conventional justice practices, due to the restorative nature of the scheme. However, the qualitative data raised a number of issues, particularly relating to problems of “net-widening” and the impact of recording processes on young people's desistance, as well as the role of victim engagement in the process. These issues could undermine the long-term effectiveness of Triage and its successful application within other youth justice contexts. Originality/value – The paper aims to contribute further understanding regarding the impacts of RJ practices on reducing re-offending compared to traditional processes, and in particular, consider the role of implementation issues in the production of outcomes and impacts.

Impact of IPO grading on earnings management

2015 ◽  
Vol 13 (2) ◽  
pp. 142-158 ◽  
Author(s):  
Yogesh Maheshwari ◽  
Khushbu Agrawal
Keyword(s):  
Earnings Management ◽  
Initial Public Offering ◽  
Design Methodology ◽  
Discretionary Accruals ◽  
Alternative Measure ◽  
Cross Sectional ◽  
Content Type ◽  
Public Offering ◽  
The Impact ◽  
First Time

Purpose – This paper aims to examine the impact of initial public offering (IPO) grading on earnings management by Indian companies in their IPOs. Specifically, it investigates whether earnings management significantly differs in the pre-IPO grading regime and post-IPO grading regime. Further, it examines whether earnings management significantly differs between high-graded and low-graded IPOs. Design/methodology/approach – The cross-sectional modified Jones model is used to obtain the discretionary accruals, a proxy for earnings management. The impact of IPO grading on earnings management is assessed using multiple regression analysis. Findings – Earnings management is significantly lower in graded IPOs as compared to the ones that are not graded. Further, among the graded IPOs, the high-graded IPOs exhibit lower earnings management as compared to the low-graded IPOs. The findings are robust to the use of an alternative measure for discretionary accruals. Originality/value – IPO grading in India is a unique certification mechanism, introduced for the first time in any market. This paper establishes the efficacy of this mandatory certification mechanism in reducing earnings management. The findings could be valuable to issuer companies, investors and market regulators.

Aquifer vulnerability to pollution of Oum El-Bouaghi region in North East of Algeria

2017 ◽  
Vol 28 (3) ◽  
pp. 384-399
Author(s):  
Nadjet Zair ◽  
Salah Chaab ◽  
Catherine Bertrand
Keyword(s):  
Sensitivity Analysis ◽  
Vadose Zone ◽  
Vulnerability Assessment ◽  
Design Methodology ◽  
Aquifer Vulnerability ◽  
Parameter Sensitivity Analysis ◽  
Content Type ◽  
North East ◽  
The Impact

Purpose The purpose of this paper is to assess the vulnerability of the aquifer using two models of analysis (DRASTIC and GOD) that were applied in practice in the regions of Bir Chouhada, Souk Naamane and Ouled Zouai in the district of Oum El-Bouaghi. Design/methodology/approach This study aims to determine the most adequate methods to ensure the protection of the Bir Chouhada, Souk Naamane and Ouled Zouai aquifer from pollution using vulnerability assessment. The application of the DRASTIC and GOD models made this evaluation possible. Findings The analysis of the both maps of vulnerability, resulting from the application of the two methods (DRASTIC and GOD), has revealed several classes of vulnerability that are no-, low-, medium- and high-vulnerable area. High DRASTIC vulnerability values vary between 145 and 178, and those of GOD vary between 0.07 and 0.57. It is observed that vulnerability increases from the center toward the eastern part of the plain; this is confirmed by the repartition of nitrate contents. The impact of the hydraulic conductivity on vulnerability to pollution is more significant than those of the vadose zone and the aquifer media. This is well observed when considering the single-parameter sensitivity analysis. Originality/value The text deepens the understanding of the vulnerability assessment and quality of the aquifer and the groundwater. The present study can be used for the assessment and the management of groundwater.

The consideration of trees in rights of light cases: part 1

2014 ◽  
Vol 32 (3) ◽  
pp. 219-237 ◽  
Author(s):  
Peter S. Defoe ◽  
Catherine Spence
Keyword(s):  
Design Methodology ◽  
Theoretical Modelling ◽  
Deciduous Trees ◽  
Content Type ◽  
Reasonable Degree ◽  
Considerable Benefit ◽  
The Right ◽  
The Impact ◽  
First Time ◽  
Practical Implications

Purpose – The purpose of this paper is to establish a methodology by which the impact of trees may be assessed in rights of light cases. Design/methodology/approach – By considering the available technologies and theoretical modelling, the research demonstrated that the loss of daylight resulting from the existence of trees can be evaluated to a reasonable degree such that their effect in rights of light cases may be taken into account by the courts. Findings – The extent of obstruction to daylight that is caused by trees changes from season to season, i.e. trees grow in height and/or width and deciduous trees tend to lose their leaves during the winter. Measurement of the trees should occur during winter months and reasonable approximations can be made. Research limitations/implications – Further research is advisable to provide a more complete compendium of tree types and to build a reliable database of transparency values and rights of light software will need to be modified to simplify the calculation process. Practical implications – The consideration of trees in rights of light cases may be very significant. A dominant owner may be more affected by a proposed development if part of their light is already obstructed by trees and a servient owner may have an argument that existing trees cause a significant obstruction which might, in the right circumstances, reduce or remove the actionability of their proposals. Social implications – This research will have considerable benefit to anyone contemplating rights of light involving obstruction by trees. Originality/value – This is the first time that the use of BRE transparency factors for trees has been considered in connection with rights of light.

Data bibliometrics: metrics before norms

2017 ◽  
Vol 41 (3) ◽  
pp. 428-435 ◽  
Author(s):  
David Stuart
Keyword(s):  
Design Methodology ◽  
Research Data ◽  
Content Type ◽  
Data Citation ◽  
Different Types ◽  
Data Ecosystem ◽  
The Impact ◽  
First Time

Purpose The purpose of this paper is to highlight the problem of establishing metrics for the impact of research data when norms of behaviour have not yet become established. Design/methodology/approach The paper considers existing research into data citation and explores the citation of data journals. Findings The paper finds that the diversity of data and its citation precludes the drawing of any simple conclusions about how to measure the impact of data, and an over emphasis on metrics before norms of behaviour have become established may adversely affect the data ecosystem. Originality/value The paper considers multiple different types of data citation, including for the first time the citation of data journals.

Interest rate option hedging portfolios without bank account

2019 ◽  
Vol 37 (1) ◽  
pp. 134-142
Author(s):  
Alberto Bueno-Guerrero
Keyword(s):  
Design Methodology ◽  
Contingent Claim ◽  
Necessary And Sufficient Condition ◽  
Barrier Option ◽  
Bank Account ◽  
Content Type ◽  
Option Hedging ◽  
Hedging Portfolio ◽  
Necessary And Sufficient ◽  
First Time

Purpose This paper aims to study the conditions for the hedging portfolio of any contingent claim on bonds to have no bank account part. Design/methodology/approach Hedging and Malliavin calculus techniques recently developed under a stochastic string framework are applied. Findings A necessary and sufficient condition for the hedging portfolio to have no bank account part is found. This condition is applied to a barrier option, and an example of a contingent claim whose hedging portfolio has a bank account part different from zero is provided. Originality/value To the best of the authors’ knowledge, this is the first time that this issue has been addressed in the literature.

The effects of materialism on consumer evaluation of sustainable synthetic (lab-grown) products

2020 ◽  
Vol 37 (5) ◽  
pp. 579-590
Author(s):  
Jessica Keech ◽  
Maureen Morrin ◽  
Jeffrey Steven Podoshen
Keyword(s):  
Design Methodology ◽  
Socially Responsible ◽  
Content Type ◽  
Consumer Evaluation ◽  
Positioning Strategy ◽  
Consumer Markets ◽  
The Future ◽  
Promotion Strategies ◽  
Alternative Sources ◽  
The Impact

Purpose The increasing desire of consumers for socially responsible luxury products combined with fluctuating supplies in consumer markets are leading various industries to seek alternative sources to be able to meet the needs of its customers. One possible solution that may meet the demands of the future is lab-grown products. Because these products confer multiple benefits, this study aims to investigate the most effective ways to appeal to consumers by aligning the benefits of the products with their values as marketers seek to find effective promotion for these items. Design/methodology/approach We examine the effectiveness of an ethical positioning strategy for two types of luxury lab-grown (synthetic) products among high versus low materialism consumers in three experiments. Findings Findings suggest that a positioning strategy stressing product ethicality is more effective for low materialism consumers, whereas the strategy is less effective, and may even backfire, for high materialism consumers. The impact on social status consumers perceive from a lab-grown product explains why this effect occurs among low materialism consumers. Therefore, marketers should take caution and use specific appeals for different segments based on values such as consumers’ materialism levels. Originality/value If lab-grown products represent the wave of the future, it is important to understand how consumers will respond to this emerging technology and how promotion strategies may enhance their evaluation.

Embedding employability within higher education for the profession of policing

2019 ◽  
Vol 9 (3) ◽  
pp. 319-328
Author(s):  
Ian Pepper ◽  
Ruth McGrath
Keyword(s):  
Higher Education ◽  
Design Methodology ◽  
Research Study ◽  
Longitudinal Research ◽  
Evidence Base ◽  
Content Type ◽  
Educational Provision ◽  
Professional Body ◽  
The Impact ◽  
Practical Implications

Purpose The purpose of this paper is to evaluate the impact of an employability module, the College of Policing Certificate in Knowledge of Policing (CKP), on students’ career aspirations, their confidence and wish to join the police along with the appropriateness of the module. This will inform the implementation of employability as part of the College of Policing-managed Police Education Qualifications Framework (PEQF). Design/methodology/approach A three-year longitudinal research study used mixed methods across four points in time to evaluate the impact on students studying the employability module. Findings The research suggests that the employability-focussed CKP was useful as an introduction to policing, it developed interest in the police and enhanced the confidence of learners applying to join. Lessons learnt from the CKP should be considered during the implementation of the PEQF. Research limitations/implications The ability to generalise findings across different groups is limited as other influences may impact on a learner’s confidence and employability. However, the implications for the PEQF curriculum are worthy of consideration. Practical implications As the police service moves towards standardised higher educational provision and evolution of policing as a profession, lessons can be learnt from the CKP with regards to the future employability of graduates. Originality/value Enhancing the employability evidence base, focussing on policing, the research identified aspects which may impact on graduates completing a degree mapped to the PEQF. The research is therefore of value to higher education and the professional body for policing.

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