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Article

Tadashi Dohi, Hiroyuki Okamura and Cun Hua Qian

In this paper, the authors propose two construction methods to estimate confidence intervals of the time-based optimal software rejuvenation policy and its associated…

Abstract

Purpose

In this paper, the authors propose two construction methods to estimate confidence intervals of the time-based optimal software rejuvenation policy and its associated maximum system availability via a parametric bootstrap method. Through simulation experiments the authors investigate their asymptotic behaviors and statistical properties.

Design/methodology/approach

The present paper is the first challenge to derive the confidence intervals of the optimal software rejuvenation schedule, which maximizes the system availability in the sense of long run. In other words, the authors concern the statistical software fault management by employing an idea of process control in quality engineering and a parametric bootstrap.

Findings

As a remarkably different point from the existing work, the authors carefully take account of a special case where the two-sided confidence interval of the optimal software rejuvenation time does not exist due to that fact that the estimator distribution of the optimal software rejuvenation time is defective. Here the authors propose two useful construction methods of the two-sided confidence interval: conditional confidence interval and heuristic confidence interval.

Research limitations/implications

Although the authors applied a simulation-based bootstrap confidence method in this paper, another re-sampling-based approach can be also applied to the same problem. In addition, the authors just focused on a parametric bootstrap, but a non-parametric bootstrap method can be also applied to the confidence interval estimation of the optimal software rejuvenation time interval, when the complete knowledge on the distribution form is not available.

Practical implications

The statistical software fault management techniques proposed in this paper are useful to control the system availability of operational software systems, by means of the control chart.

Social implications

Through the online monitoring in operational software systems, it would be possible to estimate the optimal software rejuvenation time and its associated system availability, without applying any approximation. By implementing this function on application programming interface (API), it is possible to realize the low-cost fault-tolerance for software systems with aging.

Originality/value

In the past literature, almost all authors employed parametric and non-parametric inference techniques to estimate the optimal software rejuvenation time but just focused on the point estimation. This may often lead to the miss-judgment based on over-estimation or under-estimation under uncertainty. The authors overcome the problem by introducing the two-sided confidence interval approach.

Details

International Journal of Quality & Reliability Management, vol. 37 no. 6/7
Type: Research Article
ISSN: 0265-671X

Keywords

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Article

Sang-Gun Lee, Chang-Gyu Yang and Eui-Bang Lee

The purpose of this paper is to identify how adoption drivers change before and after key milestones of ICT product adoption (i.e. critical mass point (CMP) (adoption rate…

Abstract

Purpose

The purpose of this paper is to identify how adoption drivers change before and after key milestones of ICT product adoption (i.e. critical mass point (CMP) (adoption rate 16 percent), market saturation point (MSP) (50 percent) and new generation release point (NGRP)) based on actual subscriber data of the mobile communications industry that represents the ICT market, so that it has implications for the rejuvenation of ICT product adoption that has rarely been addressed in earlier studies.

Design/methodology/approach

This study examined the overall characteristics of ICT product diffusion by tracking the actual patterns of US and Korean mobile market subscribers using the Bass diffusion model.

Findings

This study found that innovation effects gain influences on ICT product diffusion after CMP, MSP and NGRP; imitators are becoming innovators by repeated rejuvenation experiences; and cultural differences have significant influences on imitators’ ICT product adoption, but not on innovators.

Originality/value

These findings imply that rejuvenation enabled by technology innovation is a key success strategy to dominate the ICT market where the number of innovators, who have strong desires for new generation products, is constantly growing.

Details

Industrial Management & Data Systems, vol. 115 no. 2
Type: Research Article
ISSN: 0263-5577

Keywords

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Article

Erica Bennion, Michael N. Olpin and Mark DeBeliso

High levels of stress reported at college campuses has led to the need for stress management interventions. College students often do not know how to deal with the…

Abstract

Purpose

High levels of stress reported at college campuses has led to the need for stress management interventions. College students often do not know how to deal with the increase in stress during college which may lead to ineffective ways to manage stress, such as drugs, alcohol, and under the worst circumstance, suicide. Several universities have implemented stress relieving centers where students can participate in various modalities to relax and reduce symptoms of stress. The purpose of this paper is to compare four stress reduction modalities on the amount of physiologic and perceived stress (PS) reduction in a stress relief center.

Design/methodology/approach

Archival information of 5,526 students (2,759 female, 2,767 male) were analyzed. During their time at the relaxation center, these students would participate in one of four relaxation modalities (massage chair, chi machine, rejuvenation lounger, or sitting meditation). Upon entering and exiting the center, PS, systolic blood pressure (SBP), diastolic blood pressure (DBP), and heart rate (HR) were measured. The dependent variables were compared from pre- to post-relaxation with paired tests. Gain scores were calculated for each dependent variable and compared between modalities with an ANOVA and post hoc independent t-tests. The α was set at=0.05 for statistical significance.

Findings

Results indicated that all four modalities showed an overall decrease in stress-related symptoms for both men and women (p<0.05). There was no statistical difference in dependent variable gain scores between the relaxation modalities (p>0.05) for men. There was no statistical difference in dependent variable gain scores between the relaxation modalities (p>0.05) for women except for SBP and DBP where the massage chair, chi machine, and sitting meditation all reduced SBP and DBP to a greater degree than the rejuvenation lounger (p<0.05).

Originality/value

The results of this study suggest that the use of these stress reduction modalities (massage chair, chi machine, rejuvenation lounger, or sitting meditation) is effective at transiently reducing physiologic and perceived measures of stress of college students. Universities should recognize the importance of stress relief centers in order to help students manage stress symptoms and effectively manage their daily stress levels.

Details

International Journal of Workplace Health Management, vol. 11 no. 1
Type: Research Article
ISSN: 1753-8351

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Executive summary

AZERBAIJAN: Election is rejuvenation without reform

Details

DOI: 10.1108/OXAN-ES250587

ISSN: 2633-304X

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Geographic
Topical
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Article

Han. T.M. van der Zee

Compelled by every increasing competition, newly opening markets, globalization, deregulation channels and joint ventures. Information technology (IT) is increasingly…

Abstract

Compelled by every increasing competition, newly opening markets, globalization, deregulation channels and joint ventures. Information technology (IT) is increasingly taking on a key role in this. IT helps in restructuring business units, business processes, business activities, and business networks, all with the aim of faster, cheaper and better performance. This means ever higher requirements are being set for the IT that is needed. Examines the necessary strategy and the questions that have to be answered by IT organization managers, if they are to be, and remain, successful.

Details

Information Management & Computer Security, vol. 6 no. 2
Type: Research Article
ISSN: 0968-5227

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Article

Edward Brooker and Jason Burgess

The purpose of this paper is to address reasons why destinations stagnate and lose visitor numbers and to offer a series of methods, which stakeholders can employ to…

Abstract

Purpose

The purpose of this paper is to address reasons why destinations stagnate and lose visitor numbers and to offer a series of methods, which stakeholders can employ to assist with rejuvenation efforts.

Design/methodology/approach

The paper is based on a limited literature review of Butler's Tourism Area Life Cycle (1980). The academic theory is applied to the on‐going situation that is occurring in the Niagara region of Canada, although the insights are applicable to other tourism destinations that are facing stagnation and decline.

Findings

While Niagara tourism is currently experiencing a decline in visitor numbers brought about by a series of factors, the destination has the opportunity to rejuvenate its offering. Key components of the rejuvenation include collaboration, strategizing, developing a destination brand that resonates with existing and future visitors and incremental and revolutionary innovation. Once these key elements are in play, the destination should see visitor numbers rebound if not surpass previous high water marks.

Originality/value

This paper is of value to destination marketing officials and entrepreneurs who may believe visitation numbers are lower as a result of a variety of external factors including rising fuel prices, global warming, terrorism threats, changing passport regulations, SARS, hurricanes, tsunamis, and other concerns. By understanding the signals associated with stagnation, destination stakeholders will be in a position to take proactive actions designed to rejuvenate the destination.

Details

International Journal of Contemporary Hospitality Management, vol. 20 no. 3
Type: Research Article
ISSN: 0959-6119

Keywords

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Article

François Grima, Pascal Paillé, Jorge H. Mejia and Lionel Prud'homme

Mentoring is more and more studied by researchers on account of its professional and personal impact on mentees. This contribution has two main objectives. First, to…

Abstract

Purpose

Mentoring is more and more studied by researchers on account of its professional and personal impact on mentees. This contribution has two main objectives. First, to empirically validate the benefits for the mentor and to test links between mentoring activities and benefits through a multidimensional analysis. Second, to incorporate two variables structuring the relationship into the analysis: the formal vs informal nature of the mentoring relationship and the gender composition of the dyad. The paper aims to discuss these issues.

Design/methodology/approach

In total, 161 French managers have been surveyed.

Findings

The results show that mentors value the personal dimension of the relationship more than the professional dimension. Moreover, informal mentoring favours the perception of a rewarding experience by the mentor, whereas formal mentoring is synonymous with improved professional performance. This research calls into question the advantage of same-sex dyads, suggesting that heterogeneity favours improved performance.

Originality/value

The originality of the paper was to focus on the homogeneity of the mentor-protégé dyad in terms of gender.

Details

Career Development International, vol. 19 no. 4
Type: Research Article
ISSN: 1362-0436

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Article

Shijuan Guo, Xinye Lv and Xiangdong Hu

The purpose of this paper is to test the impact of the soybean rejuvenation plan and the subsidy on farmers' land allocation decisions, which may reference policy…

Abstract

Purpose

The purpose of this paper is to test the impact of the soybean rejuvenation plan and the subsidy on farmers' land allocation decisions, which may reference policy adjustment from a micro perspective.

Design/methodology/approach

The paper develops a multi-objective optimized programming model on farm-level, which simulated the land-use changes, as well as the resulting changes in benefits of the rational “typical farm”. The simulation scenarios include changes in subsidy policy and production efficiency, and the baseline scenario was the production status in 2018.

Findings

The results show that an increase in soybean producer subsidy will encourage farmers to allocate more land for soybean planting, which can be considered as a policy tool in promoting soybean production in China. Besides, the effect of subsidy in adjusting soybean acreage for farms is further affected by external conditions such as production technology (such as breeding technology, pesticide and fertilizer application efficiency). Meanwhile, large-scale farms show more significant land adjustments when facing changes in policies and external conditions.

Originality/value

The value of this paper is to simulate the effects of soybean policy and subsidy change on farmers' land-allocation decisions through a multi-objective farmer decision-making model, which provides a micro perspective to understand the implementation effect of the soybean revitalization plan.

Details

China Agricultural Economic Review, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1756-137X

Keywords

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Book part

Bruce Prideaux, Karen McNamara and Kayla Blakeney

Shopping is an activity that is central to the tourism experience. It is also an important source of employment and often generates significant revenue for the public…

Abstract

Shopping is an activity that is central to the tourism experience. It is also an important source of employment and often generates significant revenue for the public sector. For the retail to function effectively, retailers need to understand the needs of their customers and update their range of goods as demand changes. If the retail sector fails to recognise changing demand patterns, consumer gaps will emerge as has been the case on Norfolk Island. In this case, the consumer gap has emerged because the destination has failed to recognise that the generational membership of its seniors market has shifted from the Builders generation to the Baby boomer generation. The problem has been made in worse on Norfolk Island because the government derives a significant proportion of its tax revenue from a 10% tax on the sales of goods. This chapter examines the extent of the consumer gap in the retail sector and finds that it can only be redressed by a rejuvenation of the Island's shopping sector.

Details

Advances in Hospitality and Leisure
Type: Book
ISBN: 978-1-84950-718-9

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Book part

The case of Tisens/Tesimo illustrates the critical role of governance in the course of a destination life cycle. In particular, it exemplifies how improving the…

Abstract

The case of Tisens/Tesimo illustrates the critical role of governance in the course of a destination life cycle. In particular, it exemplifies how improving the effectiveness and efficiency of destination governance has the potential to relaunch stagnating or declining destinations. First, Tisens/Tesimo has managed to improve its effectiveness by developing a common strategy in a participatory manner. Second, improving efficiency in networking through an increase in trust also seems to have supported the process of recovery. However, the challenge is to establish cost-efficient collaboration while maintaining the dynamic and adaptive capacity associated with low levels of centralization. In achieving this balance, the destination raises issues about collaborative efficiency.

Details

Contemporary Destination Governance: A Case Study Approach
Type: Book
ISBN: 978-1-78350-113-7

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