• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권1호
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• pp.237-252
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• 2017

In recent years, data centers have become the core infrastructure to deal with big data processing. For these big data applications, network transmission has become one of the most important factors affecting the performance. In order to improve network utilization and reduce job completion time, in this paper, by real-time monitoring from the application layer, we propose job-aware priority scheduling. Our approach takes the correlations of flows in the same job into account, and flows in the same job are assigned the same priority. Therefore, we expect that flows in the same job finish their transmissions at about the same time, avoiding lagging flows. To achieve load balancing, two approaches (Flow-based and Spray) using ECMP (Equal-Cost multi-path routing) are presented. We implemented our scheme using NS-2 simulator. In our evaluations, we emulate real network environment by setting background traffic, scheduling delay and link failures. The experimental results show that our approach can enhance the Hadoop job execution efficiency of the shuffle stage, significantly reduce the network transmission time of the highest priority job.

• 대한전자공학회논문지SD
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• 제42권5호
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• pp.63-72
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• 2005

본 논문에서는 가정용 로봇에 적용 할 수 있는 운영체제 수준의 동적 전력 관리 기법인 EAJS(Energy-Aware Job Scheduler)를 제안한다. EAJS는 workload가 일정하지 않은 IO 장치를 사용하는 job들을 스케줄하여 장치의 idle주기를 가능하면 연속적이게 만든 후, 장치를 shutdown 시켜서 에너지 소모를 줄이는 능동적인 저전력 스케줄러이다. EAJS는 기존의 저전력 스케줄러와 달리, IO 장치를 사용하는 job의 workload, job의 buffering에 사용 가능한 메모리의 크기, buffering으로 인해 발생하는 시간 지연 등을 동시에 고려하여 job을 스케줄 하기 때문에, 에너지를 절약하면서도 시스템의 성능 저하를 최소화 할 수 있다. EAJS의 prototype을 본 연구에서 개발한 가정용 로봇인 AFM(Autonomous Family Machine)에 구현하였으며, H.263 인코더를 수행시키는 실험을 통해 무선랜과 DSP의 에너지 소모가 최대 $44\%$ 가량 줄어듬을 확인 하였다.

• Journal of Information Processing Systems
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• 제10권4호
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• pp.581-588
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• 2014

To facilitate the implementation of a wide variety of context-aware applications based on mobile devices, general-purpose context-aware framework that applications can use by calling is needed. The context-aware framework is a middleware that performs the sensing, reasoning, and retrieving based on the knowledge base. The knowledge base must systematically represent the information required on the behavior of the context-aware framework, such as context information and reasoning information. It must also provide functions for storage and retrieval. To date, previous research on the representation of the context information have been carried out, but studies on the unified representation of the knowledge base has seen little progress. This study defines the knowledge base as the unified context information, and proposes the UniOWL, which can do a good job of representing it. UniOWL is based on OWL and represents the information that is necessary for the operation of the context-aware framework. Therefore, UniOWL greatly facilitates the implementation of the knowledge base on a context-aware framework.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2011년도 춘계학술발표대회
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• pp.220-223
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• 2011

For successfully commercialized grid systems, it is required to provide an efficient scheduling scheme which is able to optimize benefits for three participants such as consumers, brokers, and providers so that every participant has sufficient benefit to maintain a sustainable market. In this paper, we define this job scheduling problem as an objective optimization problem for three participants. The three objectives are to maximize the success rate of job execution, total achieved profit, and the system utilization. To address the scheduling problem, we propose heuristics referred to as SLA-aware scheduling scheme (SA) for optimal resource allocation. The simulation results show that the improvement and the effectiveness of the proposed scheme and the proposed scheme can outperform well-known scheduling schemes such as first come first serve (FCFS), shortest job first (SJF), and earliest deadline first (EDF).

• 한국컴퓨터정보학회논문지
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• 제24권6호
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• pp.135-140
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• 2019

The purpose of this study was to find the ethical values of dental hygiene students, to establish the right ethical values of the students, and to provide a fundamental material for the ethical education direction and curriculum of the students. In order to examine the general characteristics and ethical job behavior level among dental hygiene students, a research was conducted from 1st April 2017 to $30^{th}$ June 2017 through selecting freshman, sophomore, junior and senior students currently enrolled in the department of dental hygiene at 5 different colleges as the subjects. Statistical analysis was performed using IBM SPSS 22. The frequency analysis was used to examine their general characteristics. The independent t-test was used to examine their ethical job behavior according to their religion, hospital practice experience and code of ethics as a dental hygienist, and the one-way ANOVA was used to examine their ethical job behavior according to grade-specific characteristics. Lastly, the Scheffe's post hoc test was conducted. The significance level was 0.05. Given the results, ethical job behavior was significantly different between the group of students with religion, the group of students with hospital practice experience, different school year students, and the group of students aware of code of ethics as a dental hygienist.

• 산업경영시스템학회지
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• 제13권21호
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• pp.127-132
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• 1990

Industrial accidents and the resulting worker injuries have adverse effect on industry. From a financial perspective, these effects are realized in large sums of money, perhaps 1.5 billions of wons which are spent last year. In the past. industry in general was not aware of the high costs incurred through injuries to workers. However, this trend has changed in recent years. This paper shows that middle managers have a critical job with respect to safety in workers. The safer middle managers have better resulting than unsafe ones. This is because the workers are more efficient and productive when acting safely. Consequently, this study was primarily an attempt to identify the relationship among middle manager behavior, job site policies, and interpersonal relationships on the job as the affect work safety and performance. More specifically this study focused on the investigation of the research questions by testing the hypotheses.

• 한국의상디자인학회지
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• 제17권3호
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• pp.149-158
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• 2015

More weight is given today to the role and capacity of fashion shopmasters who stand in direct contact with customers at department stores. The present study examines relationship between the stress factors and the job satisfaction by fashion shopmasters. The questionnaires was prepared 300 fashion shopmasters who work at fashion brand shops for ladies' formal and casual dress in department stores located in Chungcheong provincial areas from Aug. 5 to 23, 2013. Out of the distributed questionnaires, 270 were returned and 256 were put to the final analysis after excluding those that were replied unfaithfully. The second stage was to collected data underwent frequency analysis, factor analysis, reliability analysis and regression analysis to determine the effects of variables by using SPSS 18.0. Fashion shop masters are therefore requested to have exact understanding to their role as retail sales professionals, fashion advisers and experts of fashion shop management, to become well aware of their job in detail, to apply such knowledge to their practical job performance and to make personal efforts to promote their status as fashion shop masters.

• 품질경영학회지
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• 제44권3호
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• pp.649-660
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• 2016

Purpose: The purpose of this study is to find empirical studies the causal relationship among positive defining representation, negative defining representation, surface acting, deep acting, dissatisfaction of job, and intention of job transfer. Methods: The collected data through the survey by customer satisfaction team of "A" company call center. Results: The result of this study is that emotion and behavior norm influence on deep act of expressing both positive impacts of the employees. Conclusion: Feelings of corporate representation norm is psychologically of employees that because it affects even also must facilitate the surface acts and internal acts of employees and job dissatisfaction at the same time due to emotional dissonance and emotional exhaustion and turnover are hidden on the back emotion norms in the contact department, it should be aware of the need to address the emotional problems. Companies need to develop a variety of programs with attention to addressing the emotional difficulties experienced by workers.

• Safety and Health at Work
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• 제13권1호
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• pp.3-8
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• 2022

Background: This study aims to allow the development of efficient measures to improve occupational health of shift-working nurses focusing on job stress, health promotion behavior, resilience, and sleep disturbance. Methods: It was conducted on a subject panel of 137 nurses who were aware of the purpose of the study and agreed to participate. They worked three shifts at a tertiary hospital or a general hospital located in metropolitan city B. The collected data were analyzed by the independent t test and one-way analysis of variance and post-tested by Scheffe's test, Pearson's correlation coefficients, and multiple linear regression analysis using SPSS/WIN 25.0. Results: The significant influencing factors on sleep disturbance were of those whose subjective health status was 'normal' (b = 0.29, p < .001), 'not healthy' (β = .40, p < .001), who have job stress (β = .22, p = .003), and who have health promotion behavior (β = -0.17, p = .023). The overall explanatory power was 31.1% (F = 16.31, p < .001). Conclusion: Through this study, nurses' subjective health status and job stress of working shifts were found to be important factors influencing the sleep disturbance level, and the most influencing factor was identified as the subjective health status.

• 한국직업건강간호학회지
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• 제7권1호
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• pp.83-96
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• 1998

The study was conducted to analyze employees' and employers' awareness of occupational health programs for the purpose of evaluating the effectiveness of the program employed in small-scale enterprises (SSE). The 400 SSE that have under 50 employees and have been supported by the Government were selected for mail survey, and 120 employers and 318 employees of 183 factories returned the questionnaires. The results are as follows; 1) 33.8% of employees were not aware of the fact that their factories have been supported by Government, and 69.1% of employees did not know who was the monitor of that program. Only 147% of employees and 35.5% of employers agreed that the supported program reflected their opinions well. 2) 45.1% of employees participated in health education classes more than once. But only 15.6% of them considered the classes as very helpful. 21.1% of employers were much aware of health education schedule, and 44.2% reported that it was helpful for the prevention of occupational diseases. 3) 68.8% of employers were aware of the possibility of occupational diseases that could occur in their factories. And 36.5% of employers reported that some criteria were used for job reallocation to their employees. But only 9.7% of employees were assigned new job based on the result of health status examination. 4) 65.6% of employees were aware of the periodic evaluation for work environment, and 43.3% knew the evaluation results. Among participated SSE, 5.9% have a planning department for improving work environment, and 46.2% actually carried out the program for improving work environment. The findings showed that the employers and employees of SSE had insufficient knowledge of the occupational health program that have been employed in their workplace. It is essential to lead more active participation of employers and employees in their occupational health programs so as that the programs are to improve their health status as well as work environment more effectively.