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Association between presenteeism and mental health among logistic center workers

  • Hyoungseob Yoo;Ji-hun Song;Hyoung-Ryoul Kim
    • Annals of Occupational and Environmental Medicine
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    • v.34
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    • pp.39.1-39.11
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    • 2022
  • Background: Workers in logistics centers are always pressed for time to collect and pack products. They also participate in high-intensity manual labor in which various musculoskeletal hazards exist. In the case of logistic center labor, it is estimated that there is a high risk of presenteeism due to the above characteristics which can cause deterioration of workers' mental health. However, there is insufficient research on this topic. Methods: Workers in a logistic center were surveyed using an Internet questionnaire. The survey items included demographic characteristics, labor intensity and work-related factors, and mental health aspects such as depression and anxiety. The survey was conducted for about a month from July 26, 2021 and a total of 353 people were analyzed. Through the χ2 test and t-test, the characteristics of workers who experienced presenteeism were examined and the prevalence ratios (PRs) of depression and anxiety experiences were calculated by multivariable Poisson regression. Afterwards, stratification analysis considering gender, the type of contract, and labor intensity was implemented. Results: In the group that experienced presenteeism, the number of working days per week was higher and fixed-term workers, high labor intensity, and sleep deprivation were more common. In the multi-Poisson regression analysis conducted by adjusting the demographic characteristics, working hours, and work-related factors, the PRs of depression and anxiety were 1.98 (95% confidence interval: 1.24-3.18) and 1.81 (1.22-2.68), respectively. In particular, the p-value for interactions was significant when stratified with the type of contract. Conclusions: As a result of the study, presenteeism and mental health were associated in logistic center workers. To prevent mental health issues of logistic center workers, management of presenteeism is necessary and a prospective study is needed.

Prevalence of Workplace Microaggressions and Racial Discrimination: A Systematic Review and Meta-analysis

  • Nader Salari;Ahoura Fattah;Amin Hosseinian-Far;Mojdeh Larti;Sina Sharifi;Masoud Mohammadi
    • Safety and Health at Work
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    • v.15 no.3
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    • pp.245-254
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    • 2024
  • Background: In recent years, the rise of workplace racial discrimination and microaggressions has decreased the efficiency and productivity of organizations and institutions, and realization of organizational goals globally. Accordingly, it was decided to conduct a systematic review and meta-analysis in the present study with the aim of investigating the prevalence of microaggression and racial discrimination in the workplace. Methods: The PubMed, Scopus, Web of Science, ScienceDirect and Google Scholar databases were systematically searched for studies that had reported the effects of work stress among managers. The search did include a lower time limit and was conducted in June 2023. The heterogeneity of the studies was investigated using the I2 index, and accordingly random effects method was adopted for meta-analysis. Data analysis was conducted with the Comprehensive Meta-Analysis (v.2) software. Results: In the review of seven studies with a sample size of 2998 people, the overall prevalence of microaggression and racial discrimination in the workplace was found to be 73.6% and 18.8%, respectively. Publication bias within the selected studies was examined with the Egger's test, which indicated the absence of publication bias for the pooled prevalence of workplace microaggression (p: 0.264) and for the pooled prevalence of workplace racial discrimination (p: 0.061). Conclusion: The results obtained from this report indicate the high impact of micro-aggression and racial discrimination in the workplace. Considering the negative effects of such behaviours, the findings from this study will be helpful to managers and health policymakers.

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Scheduling Algorithms and Queueing Response Time Analysis of the UNIX Operating System (UNIX 운영체제에서의 스케줄링 법칙과 큐잉응답 시간 분석)

  • Im, Jong-Seol
    • The Transactions of the Korea Information Processing Society
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    • v.1 no.3
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    • pp.367-379
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    • 1994
  • This paper describes scheduling algorithms of the UNIX operating system and shows an analytical approach to approximate the average conditional response time for a process in the UNIX operating system. The average conditional response time is the average time between the submittal of a process requiring a certain amount of the CPU time and the completion of the process. The process scheduling algorithms in thr UNIX system are based on the priority service disciplines. That is, the behavior of a process is governed by the UNIX process schuduling algorithms that (ⅰ) the time-shared computer usage is obtained by allotting each request a quantum until it completes its required CPU time, (ⅱ) the nonpreemptive switching in system mode and the preemptive switching in user mode are applied to determine the quantum, (ⅲ) the first-come-first-serve discipline is applied within the same priority level, and (ⅳ) after completing an allotted quantum the process is placed at the end of either the runnable queue corresponding to its priority or the disk queue where it sleeps. These process scheduling algorithms create the round-robin effect in user mode. Using the round-robin effect and the preemptive switching, we approximate a process delay in user mode. Using the nonpreemptive switching, we approximate a process delay in system mode. We also consider a process delay due to the disk input and output operations. The average conditional response time is then obtained by approximating the total process delay. The results show an excellent response time for the processes requiring system time at the expense of the processes requiring user time.

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Clinical Characteristics and Heart Rate Variability of Foreign Domestic Violence Victims in Korea (국내 거주 외국인 가정폭력 피해 여성의 임상적 특징 및 심박변이도)

  • Kim, Kyu-Lee;Choi, Jin-Sook;Jang, Yong-Lee;Lee, Hae-Woo;Sim, Hyun-Bo
    • Sleep Medicine and Psychophysiology
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    • v.24 no.1
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    • pp.46-54
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    • 2017
  • Objectives: Domestic violence is related to many psychiatric diseases, such as depression, anxiety disorder, and PTSD. Heart rate variability (HRV) is an index of autonomic control of the heart and is related to cardiovascular and emotional disorders. Although there have been some studies on the effects of domestic violence on women's mental health, relatively little information is available on HRV in this population. The aim of this study is to investigate demographic data, psychological features, and HRV in female victims of domestic violence and difference between Korean and foreign female victims. Methods: A total of 210 female victims of domestic violence (166 Korean women and 44 foreign women) were recruited for this study. Psychological symptoms were measured using the Hamilton Rating Scale for Anxiety (HAM-A), Hamilton Rating Scale for Depression (HAM-D), and Impact of Event Scale-Revised (IES-R). HRV measures were assessed by time-domain and frequency-domain analyses. Results: The mean score of HAM-A was 13.81, that of HAM-D was 12.92, and that of IES-R was 33.61 ; there were no significant differences between Korean and foreign women in these measures. In HRV time domain analyses, approximate entropy (ApEn) was significantly increased in foreign women compared to the Korean women. The square root of the mean of the sum of the squares of differences between adjacent NN intervals (RMSSD) was significantly decreased in foreign women compared to Korean women. There were no significant differences in the other HRV variables between Korean and foreign women. Conclusion: Female victims of domestic violence in Korea are associated with depression, anxiety, and PTSD symptoms. The physiologic factors of a female victim's nationality could be related to higher ApEn and lower RMSSD in foreign female victims. These findings have important implications for future study to study the relationships among ethnic and environmental factors and HRV variables.

Fabrication of Portable Self-Powered Wireless Data Transmitting and Receiving System for User Environment Monitoring (사용자 환경 모니터링을 위한 소형 자가발전 무선 데이터 송수신 시스템 개발)

  • Jang, Sunmin;Cho, Sumin;Joung, Yoonsu;Kim, Jaehyoung;Kim, Hyeonsu;Jang, Dayeon;Ra, Yoonsang;Lee, Donghan;La, Moonwoo;Choi, Dongwhi
    • Korean Chemical Engineering Research
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    • v.60 no.2
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    • pp.249-254
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    • 2022
  • With the rapid advance of the semiconductor and Information and communication technologies, remote environment monitoring technology, which can detect and analyze surrounding environmental conditions with various types of sensors and wireless communication technologies, is also drawing attention. However, since the conventional remote environmental monitoring systems require external power supplies, it causes time and space limitations on comfortable usage. In this study, we proposed the concept of the self-powered remote environmental monitoring system by supplying the power with the levitation-electromagnetic generator (L-EMG), which is rationally designed to effectively harvest biomechanical energy in consideration of the mechanical characteristics of biomechanical energy. In this regard, the proposed L-EMG is designed to effectively respond to the external vibration with the movable center magnet considering the mechanical characteristics of the biomechanical energy, such as relatively low-frequency and high amplitude of vibration. Hence the L-EMG based on the fragile force equilibrium can generate high-quality electrical energy to supply power. Additionally, the environmental detective sensor and wireless transmission module are composed of the micro control unit (MCU) to minimize the required power for electronic device operation by applying the sleep mode, resulting in the extension of operation time. Finally, in order to maximize user convenience, a mobile phone application was built to enable easy monitoring of the surrounding environment. Thus, the proposed concept not only verifies the possibility of establishing the self-powered remote environmental monitoring system using biomechanical energy but further suggests a design guideline.

A Comparison Study on the Internet Addiction and Health Problems of Middle School Students between Urban and Rural Area (도농간 중학생의 인터넷 중독과 건강문제 비교연구)

  • Yeon, Mi-Jung;Kim, Keon-Yeop;Lee, Moo-Sik;Hong, Jee-Young;Bae, Seok-Hwan;Hwang, Hye-Jeong
    • Journal of the Korea Convergence Society
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    • v.1 no.1
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    • pp.41-47
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    • 2010
  • This study was conducted to investigate determinent factors of the internet addiction that have influenced on middle school students. We randomly selected each one middle school in urban and rural areas, and conducted survey in 862 students of 2nd and 3rd grade from September 1 to 15, 2005. By using a statistical program called SPSS10.0, the data collected thereby were analyzed through a series of statistical methods including $x^2$-test, logistic regression analysis. The result of logistic regression analysis showed that the significant variables in urban area were resting time and using time a day. In rural area, sex, economic level, resting time and using time a day were significant variables. Higher status of internet addiction showed significant relationship with physical problems, anxiety, maladjustment to school, insufficient sleep time, fatigue in eyes, headache, pain in neck or shoulder, chronic fatigue, reduced vision, weight reduction, indigestion, xeroderma and adjustment to school. Especially, resting time and using time a day have dominant influence on internet addiction. And in case that the groups who showed high addiction tendency, there were negative health problem by physical, mental and social problem. To prevent internet addiction health education programs of right internet use and time, importance of rest, and health problems must be considered in internet addiction prevention policy.

Correlation between Smartphone Addiction and Eating Behaviors of Elementary School Students in Ansan Area (안산지역 초등학생의 스마트폰 중독과 식행동과의 상관성)

  • Kim, Eun Ji;Kim, Seong Yeong
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.44 no.7
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    • pp.1007-1015
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    • 2015
  • This study investigated the correlation between smartphone addiction and eating behaviors of 288 elementary school students (fifth and sixth grades) in the Ansan area. Addiction and normal groups consisted of 29 (10.1%) and 259 students (89.9%). Average usage time of the smartphone addiction group was higher than that of the normal group (P<0.001). Percentages of using a smartphone when eating meals as well as skipping meals due to using a smartphone were also higher in the addiction group than the normal group (P<0.01). Degree of reduction of physical activity and sleep disorders due to using a smartphone were higher in the addiction group than the normal group (P<0.001). However, nutritional knowledge related to protein and dietary life scored lower in the addiction group than the normal group (P<0.05). Correlation between smartphone usage time and eating behaviors was as follows: smartphone usage time on weekdays increased with elevated usage time on weekends in the addiction group (+0.742) (P<0.001) and the normal group (+0.762) (P<0.001). Frequency of snack intake in the addiction group increased with elevated usage time on weekdays (+0.460) (P<0.05). Sleeping time of the normal group decreased with elevated usage time on weekdays (-0.150) (P<0.05), and good eating behaviors decreased with elevated usage time the on weekend (-0.143) (P<0.05). Consequently, smartphone addiction in elementary school students showed negative eating behaviors. Therefore, effective nutritional education programs and national support policy are required to solve problems of unhealthy eating behaviors from smartphone usage in elementary school students.

Development of a Family Pattern Appraisal to Guide a Rogerian Nursing Practice (Rogers 이론에 근거한 가족양상 사정지침개발)

  • 이광옥;한영란;김희정
    • Journal of Korean Academy of Nursing
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    • v.25 no.4
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    • pp.751-773
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    • 1995
  • We, clinical nurse specialists practising and guiding student practice in a Community health nursing clinic, wanted to develop a family pattern appraisal consistent with Rogers' conceptual system, the nursing model guiding our practice. We use Rogers' model because it is harmonious with the traditional Korean view of the one human, natural and cosmic world. The purpose of our research was to contribute to science - based nursing practice, not only, one helpful model, but also a model of how to use, in guiding practice, a conceptual system which reflects nurse practitioners' philosophy of nursing, is intellectually satisfying, and enriches meaning in daily nursing life. The research objectives were to review the literature on Rogers' model and analyse it according to Kim's five - level analytical framework, to explore Rogers' definition of family, to review appraisals based on Rogers' model, and to develop a family appraisal which is culturally appropriate for use in our community. This work including the use of the appraisal and its refinement with families in our practice which was done during 1994 and 1995, in Seoul, in the Capital of the Republic of Korea. At the highest level of analysis, Rogers conceptual system emphasizes acausality and multidimentional meaning ; the world view is characterized by process, movement and wholeness. The epistemology Is one of holism and the knowledge base includes all forms of experience, from sensory to mystical, objective, and subjective. At the metaparadigm level, nursing focuses on the unitary human being and the environment. At the level of nursing philosophy, the model identifies human being, nursing, nurse, and illness and health. At the paradigm level the model assumes the irriducibility of the human to parts, noncausality and continual change. Rogers' practice methodology consists of pattern manifestation appraisal and deliberative mutual patterning. Under-standing patterns and patterning of people is the key to helping them achieve their potential. At the theory level, the basic assumptions, key concepts, and homeodynamic principles were identified. Rogers states the family energy field is an undividable, four-dimensional negentropic energy field which is in a larger envircinmental field show-ing such characteristics as cannot be predicted by knowledge of individual family members. Based on the word of Rogers scholars, we chose Rogers' correlates of patterning to understand the family unit as a whole-frequency, rhythms, motion, time perception, sleeping-waking beyond waking, pragmatic -imaginative-visionary to develop the appraisal. We, also used some of Barrel's (1988) criteria including interpersonal network and professional health care access and use, and Cordon's (1982) criteria including self perception - self concept modified to fit the family. Our family Pattern appraisal included 1. Influencirg data, 2. Professional health care access and use, 3. Family self perception-self concept, 4. Family interpersonal network, 5. Sleep-wake-be-yond waking, 6. Pragmatic-imaginary-visionary, 7. Family frequency and rhythm, 8. Family motion, 9. Family time perception. The appraisal was used with four families and modified to eliminate overlap and to make it possible for the family member to express themselves more easily. We plan to gain more experience with the appraisal toward further development of the tool.

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Adolescent's activity needs and policy related Five-Day school week (주5일수업제 실시에 따른 청소년활동에 대한 욕구 및 정책제안)

  • Lee, Young-Joo
    • Journal of Digital Convergence
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    • v.10 no.8
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    • pp.335-340
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    • 2012
  • This study conducted five day school week as seeking direction for programs and policies that meet the needs of weekend activities want the satisfaction of youth to find out what to investigate. For purpose, actually a lot since five day school week and weekend programs whether or not to participate, hope to weekend programs, weekend activities operating in the way were examined. Findings, for the first five day schol week of youth satisfaction than girls, boys lower was, since five day school week and weekend program participation rates were lower. Most since five day school week in activities with friends, sleep, games or Internet, hobby alone, watching TV, family and activities in order appeared. Young people can study their aptitude to live autonomously in a student-centered curriculum of education is required, arising from a rapidly changing society and human relationships, social problems, to respond to a variety of leisure time, and to participate in the program will be provided an opportunity. Lessons five day school week, increased leisure time of youth, school, and community for the desired program, you will need to plan and operate with local conditions.

Relationship between Rainfall Intensity and Slope Stability based on Numerical Analysis (수치해석에 의한 강우강도와 사면 안정성의 상관성 분석)

  • Lee, Min-Seok;Kim, Gyo-Won
    • The Journal of Engineering Geology
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    • v.19 no.1
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    • pp.25-31
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    • 2009
  • This study was conducted to characterize the relationship of rainfall intensity and slope stability by using numerical analysis. The maximum precipitation rate for 10 minutes, 1 hour and 1 day was determined as 28 mm, 70 mm and 271 mm, respectively, by investigating 36 years of KMA data. Then slope infiltration analysis was performed to obtain the ground water level in the slope by using computer programming SEEP/W, and slope stability analysis was done for each time step by using program SLOPE/W. The factor of safety was minimized when the slope was saturated under each rainfall intensity; the time required for saturation was 2 hours with 10 minutes rainfall intensity of 28 mm, 7 hours with 1 hour rainfall intensity of 70 mm and 3 days with 1 day rainfall intensity of 271 mm. When accumulated rainfall was 196 mm for the 10minutes rainfall intensity of 28 mm with duration of 2 hours, the factor of safety was decreased to 1.0, while accumulated rainfall of 468 mm and 820 mm for the 1 hour and 1 day rainfall intensity, respectively, was required to reach the factor of safety, 1.0. Since the normalized rainfall intensity was 13 mm and 1.9 mm for 1 hour and 1 day maximum rainfall, respectively, those results showed that the rainfall intensity could have a more effect on the slope stability than the accumulated rainfall.