• Journal of Communications and Networks
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• 제17권3호
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• pp.247-255
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• 2015

In this paper, we propose an adaptive time division multiple access based medium access control (MAC) protocol, called bitmap-assisted shortest job first based MAC (BS-MAC), for hierarchical wireless sensor networks (WSNs). The main contribution of BS-MAC is that: (a) It uses small size time slots. (b) The number of those time slots is more than the number of member nodes. (c) Shortest job first (SJF) algorithm to schedule time slots. (d) Short node address (1 byte) to identify members nodes. First two contributions of BS-MAC handle adaptive traffic loads of all members in an efficient manner. The SJF algorithm reduces node's job completion time and to minimize the average packet delay of nodes. The short node address reduces the control overhead and makes the proposed scheme an energy efficient. The simulation results verify that the proposed BS-MAC transmits more data with less delay and energy consumption compared to the existing MAC protocols.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.84.3-84
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• 2001

Suggesting the standard of optimal transferring for one RGV or two RGV, which have multiple buffers, using average delivery time and sigma in the straight line working place. For performing the optimal transferring, present RGV-Job Dispatching algorithm, which is possible to apply in realtime, and apply random job occurrence conditions for examining the possibility to apply various real environments.

• 한국응급구조학회지
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• 제9권1호
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• pp.5-13
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• 2005

Purpose : The purpose of this study was to investigate dual gender identity, masculine gender identity, feminine gender identity, undifferentiated gender identity with related to Sex, home environments, parental child-rearing attitude of warmth, parental child-rearing attitude of control, role division of parents and determine predictors for dual gender identity. Method : Study subjects were $6^{th}$ grade of primary students with 2,118. Data was collected from Oct to Nov 2003 by using structured questionnaire. Results : ${\cdot}$ Among the children, 345 had masculine gender identity, 529 had feminine gender identity, 526 had undifferentiated gender identity, and 718 had dual gender identity. ${\cdot}$ There were significant differences in the children's sex, mother's age, father's age, mother's educational level, father's educational level, existence of mother's job, father's job, social economic status, sex of siblings, mother's job satisfaction, family structure, family atmosphere, child-rearing attitude(warmth and control), role division of parents($p{\leq}0.001$) among 4 groups. ${\cdot}$ The significant predictors for dual gender identity were children's sex (OR = 0,196, P =0.001), father's age(OR = 31.053, p = 0.020), mother's educational level(OR = 43,980, p = 0.001), father's job(OR=27.465, p = 0.001), social economic status(OR=O.941, p=0.001), sex of siblings(OR = 0.329, p = 0.005), mother's job satisfaction(OR = 0.673, p =0.001), family structure(OR = 0.887, p = 0.001), family atmosphere(OR = 23.786, p = 0.001), parental Child-rearing attitude of warmth(OR = 8.043, p = 0.001) and child-rearing attitude of control(OR = 0.666, p = 0.005), role division of parents(OR = 3.009, p = 0.001). Conclusions : These findings suggest the necessity of broad understandings about factors which influence dual gender role, and construction of combinative model. Also they suggest parent education for establishment of children's dual gender identity.

• 한국콘텐츠학회논문지
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• 제12권7호
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• pp.415-424
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• 2012

본 연구는 카지노기업 종사원의 감정노동이 소진 및 직무만족에 어떠한 영향을 미치는지 검증하고자 실시하였다. 분석 결과, 카지노기업 종사원의 감정노동 요인 중 심층행위는 정서적 탈진에 부(-)의 영향을 미치며, 표면적 행위는 정서적 탈진에 정(+)의 영향을 미치는 것으로 나타났다. 또한 심층행위와 감정제어는 개인적 성취감 결여에 부(-)의 영향을 미치며, 표면적 행위는 개인적 성취감 결여에 정(+)의 영향을 미치는 것으로 드러났다. 심층행위와 감정제어는 비인간화에 부(-)의 영향을 미치는 반면, 표면적 행위는 비인간화에 정(+)의 영향을 미치는 것으로 드러났다. 다음으로 카지노기업 종사원의 감정노동이 직무만족에 미치는 영향을 분석한 결과, 감정노동 요인 중 심층행위는 직업환경에 부(-)의 영향을 미치며, 표면적 행위는 직업환경에 정(+)의 영향을 미치는 것으로 나타났다. 또한 심층행위와 감정제어는 종사원의 보상 및 가치공유에 정(+)의 영향을 미치지만 표면적 행위는 보상 및 가치공유에 부(-)의 영향을 미치는 것으로 드러났다. 한편 카지노기업 종사원의 감정노동은 공정성에 유의한 영향을 미치지 않는 것으로 나타났으며, 감정노동 요인 중 감정제어만이 종사원의 근무환경에 정(+)의 영향을 미치는 것으로 나타났다.

• Safety and Health at Work
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• 제1권2호
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• pp.124-133
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• 2010

Objectives: This study was conducted to develop a model describing the interaction between lifestyle, job, and postural factors and parts of the upper extremities in shipyard workers. Methods: A questionnaire survey was given to 2,140 workers at a shipyard in Ulsan City. The questionnaire consisted of questions regarding the subjects' general characteristics, lifestyle, tenure, physical burden, job control, posture and musculoskeletal symptoms. The overall relationship between variables was analyzed by a structural equation model (SEM). Results: The positive rate of upper extremity musculoskeletal symptoms increased in employees who worked longer hours, had severe physical burden, and did not have any control over their job. Work with a more frequent unstable posture and for longer hours was also associated with an increased positive rate of musculoskeletal symptoms. Multiple logistic regression analysis showed that unstable posture and physical burden were closely related to the positive rate of musculoskeletal symptoms after controlling for age, smoking, drinking, exercise, tenure, and job control. In SEM analysis, work-related musculoskeletal disease was influenced directly and indirectly by physical and job stress factors, lifestyle, age, and tenure (p < 0.05). The strongest correlations were found between physical factors and work-related musculoskeletal disease. Conclusion: The model in this study provides a better approximation of the complexity of the actual relationship between risk factors and work-related musculoskeletal disorders. Among the variables evaluated in this study, physical factors (work posture) had the strongest association with musculoskeletal disorders.

• 디지털융복합연구
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• 제16권12호
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• pp.449-457
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• 2018

본 연구의 목적은 요양병원 간호사의 의사소통능력, 직무스트레스가 이직의도에 미치는 영향을 알아보고, 의사소통능력, 직무스트레스 이직의도의 관계에 감성지능의 조절 효과를 검증하는 서술적 조사연구이다. 요양병원 간호사 240명을 대상으로 2018년 2월 1일부터 28일까지 이루어졌다. 자료분석방법은 IBM SPSS Win 20.0 프로그램을 이용하여 기술통계, t-test, ANOVA. 상관관계, 단계적 다중 회귀분석과 조절효과는 위계적 다중 회귀분석으로 분석하였다. 연구결과 이직의도는 의사소통능력과 직무스트레스에 따라 높게 나타났다. 이직의도는 직무스트레스와 양의 상관관계가 있는 것으로 나타났으며 이직의도에 가장 큰 영향을 미치는 요인은 급여만족도, 직무스트레스, 연령으로 나타났다. 본 연구 결과를 토대로 요양병원 간호사의 이직의도를 줄이기 위해서는 임상특성을 반영한 체계적인 프로그램 개발과 교육이 필요하다.

• 한국직업건강간호학회지
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• 제25권1호
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• pp.55-64
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• 2016

Purpose: The aim of this study was to investigate the association between job stress and metabolic syndrome among male workers. Methods: A total of 396 male workers employed in an electronic company, located in 'P' city, Gyeonggi Province, who had taken medical examination at the 'D' hospital, volunteered in this study. All the data used in this study were obtained from 'D' hospital after getting consent and permission from the workers. General and occupational characteristics, medical history, and health-related behaviors of the subjects were obtained by self-administered questionnaire. Results: The highest occupational stress by sub-sector was reported in the order of insufficient job control, organizational system, lack of reward, job demand, job insecurity, physical environment, job culture, and relationship conflict. The prevalence rate of metabolic syndrome of the participants was 19.9%. The results of the multiple logistic regression analysis on metabolic syndrome of the subjects indicated that the syndrome was significantly higher among those with family history, smoking habit and ex-smoking, working duration of 3 years and over, and with higher total score of occupational stress. It was significantly more prevalent, when the degree of stress was high in the sub-sectors of occupational stress; job autonomy, job insecurity, lack of reward, and job culture. Conclusion: In conclusion, it is necessary to implement a plan to efficiently manage the job stress of these male workers, as the probability of metabolic syndrome increased with the increase of occupational stress. Furthermore, considering the highest occupational stress was found to be job autonomy among its sub-sectors, it is necessary to prepare various measures to enhance the autonomy of such employees.

• Journal of Preventive Medicine and Public Health
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• 제40권5호
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• pp.351-362
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• 2007

Objectives: The present study was intended to assess the mental health of nurses working for university hospitals and to establish which factors determine their mental health. Methods: Self-administered questionnaires were given to 1,486 nurses employed in six participating hospitals located in Daejeon City and Chungnam Province between July 1 st and August 31st, 2006. The questionnaire items included sociodemographic, job-related, and psychosocial factors, with job stress factors (JCQ) as independent variables and indices of mental health status (PWI, SDS and MFS) as dependent variables. For statistical analysis, the Chi-square test was used for categorical variables, with hierarchical multiple regression used for determining the factors effecting mental health. The influence of psychosocial and job-related factors on mental health status was assessed by covariance structure analysis. The statistical significance was set at p<0.05. Results: The factors influencing mental health status among subject nurses included sociodemographic characteristics such as age, number of hours of sleep, number of hours of leisure, and subjective health status; job-related characteristics such as status, job satisfaction, job suitability, stresses such as demands of the job, autonomy, and coworker support; and psychosocial factors such as self-esteem, locus of control and type A behavior patterns. Psychosocial factors had the greatest impact on mental health. Covariance structure analysis determined that psychosocial factors affected job stress levels and mental health status, and that the lower job stress levels were associated with better mental health. Conclusions: Based on the study results, improvement of mental health status among nurses requires the development and application of programs to manage job stress factors and/or psychosocial factors as well as sociodemographic and job-related characteristics.

• 한국조리학회지
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• 제9권4호
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• pp.37-53
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• 2003

The purpose of this study was to find out efficient control plan for productivity increase. To analyze the data, the measure of question a paper was used to 5 a point measure, statistics disposition was used to SPSS, the analyze method was used to frequency analyze, trust degree analyze, difference analyze useful average value, person's correlation analyze, revolution analyze. The results of this study could be explained as follow: First, find out high change separation propensity. Secondly, was subjected important for atmosphere composition and was required strategy consideration for stable job recognition. Third, was operated affirmative to recognition about separation and was increased to job satisfaction according as a colleague relation and team work. Fourth, was increased to comparative separation propensity in case that high job satisfaction. Therefore it is required interesting labor item and treatment development about personal evaluation.

• 시큐리티연구
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• 제50호
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• pp.265-283
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• 2017

본 연구는 시큐리티업무 종사자를 대상으로 직무스트레스가 조직몰입 및 이직의도에 미치는 영향을 규명하여 시큐리티업무 종사자들의 근무환경을 개선하기위한 기초자료를 제공 하는 목적으로 진행하였다. 총156명의 설문 응답을 최종 분석 자료로 사용하였으며 SPSS 18.0 통계프로그램을 이용하여 상관분석 및 중다회귀분석의 통계적 검정을 통하여 다음과 같은 결론을 도촐하였다. 첫째, 직무몰입은 직무스트레스의 하위 요인 중 보상부적절, 자율성결여, 직무불안에서 영향을 미치는 것으로 나타났다. 둘째, 이직의도는 직무스트레스 하위 요인 중 보상부적절, 직장문화, 직무요구에서 영향을 미치는 것으로 나타났다. 셋째, 이직의도는 직업몰입에 영향을 미치는 것으로 나타났다. 이상의 연구에서 도출된 결론으로 볼 때, 직무스트레스는 조직몰입과 이직의도에 영향을 미치는 것으로 나타났으며, 직무스트레스와 조직몰입의 두 변수가 이직의도의 핵심적인 결정요인으로 작용하며, 조직몰입은 매개변수로 중요한 역할을 수행한다는 것을 의미한다. 즉, 업무수행에 필요한 원칙과 방향, 지속적으로 소통할 수 있는 채널을 구축할 필요가 있다. 이를 위해서는 구조화 된 사회화 프로그램을 시스템화하고 개인의 전문성 개발을 촉진하기 위한 일련의 조직적 지원과 여건마련이 요구된다.