• 한국노년학
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• 제41권3호
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• pp.397-420
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• 2021

본 논문은 전향적 설계를 통하여 중장년 및 노년기 성인 자원봉사와 고혈압 발생, 고혈압증세 호전, 일상생활활동 어려움발생, 약복용 및 치료 등과의 관계를 규명하고자 한다. 이를 위해 2008년~2018년까지 10년에 걸쳐 수집된 종단 패널데이터를 사용했으며 분석 코호트 약 5,867명을 표본 추출하여 멀티레벨 혼합효과일반화선형 모델로 통계분석을 수행했다. 분석결과 자원봉사를 적어도 연 200시간 이상 한 사람은 안했을 때 보다 고혈압발생위험이 3.4배 낮았고, 연 50~99시간 한 사람은 안했을 때 보다 고혈압 증세호전이 더 크게 증가하였으며, 연 200시간 이상 자원봉사를 한 사람은 안했을 때 보다 활동어려움 발생확률이 7.7배 낮았으며, 그리고 연 50~99시간 자원봉사를 한 사람은 안했을 때 보다 약 복용 및 치료 발생 확률이 2.5배 낮은 것으로 나타났다. 이 결과는 중장년 및 노년기 성인의 자원봉사는 고혈압 및 관련 현상에 유익한 개선 효과가 있다는 것을 함의한다. 그리고 연구 한계점, 추후 연구방향, 실천함의를 논의했다.

• Journal of Korean Biological Nursing Science
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• 제24권4호
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• pp.243-252
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• 2022

Purpose: The purpose of this longitudinal study was to identify the relationship between the readiness for hospital discharge and self-care changes in an early stage of liver transplantation after discharge. Methods: Data of 75 liver transplant recipients within one year of surgery from a transplantation center from May 2019 to May 2020 were collected for this study. Their readiness for discharge was measured before discharge. Self-care after liver transplantation was evaluated at one week, one month, and three months of discharge at outpatient visits. Linear mixed model was used to evaluate the statistical relationship. Results: The readiness for hospital discharge was significantly higher when the caregiver was a spouse (p=.027), with fewer post-transplantation days (p=.027), absence of acute rejection (p=.004), or high self-efficacy (p<.001). As a result of the linear mixed model analysis, the higher the discharge readiness score, the higher the self-care score (β=0.29, p<.001). However, after three months, their self-care had decreased regardless of their level of readiness for hospital discharge compared to one week after discharge. Conclusion: Improving the readiness before discharge is essential to enhance self-care. Also, active intervention at 3 months of discharge should be performed to check and promote their long-term self-care.

• Journal of Audiology & Otology
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• 제23권2호
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• pp.63-68
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• 2019

Background and Objectives: To investigate the relationship between hearing impairment and alcohol drinking patterns in South Korean adults. Subjects and Methods: Data collection was performed by Korean National Health and Nutrition Survey from January 1 to December 31, 2012. Data analyses were performed from February 20 to March 3, 2018. Data from 3,860 adults 20 years of age or older without a history of malignancy or chronic otitis media in the Korean National Health and Nutrition Survey 2012 database who participated in the health questionnaires, and who had available results from otologic examinations that included pure tone audiogram, were included. Pure-tone average hearing thresholds were calculated at 500, 1,000, 2,000, and 4,000 Hz. Hearing loss was defined as a pure-tone average >40 dB in one or both ears. The Alcohol Use Disorder Identification Test was used to evaluate drinking statuses of subjects. Data were analyzed using the complex-sample χ²-test of independence and a complex-sample logistic regression analysis. Results: Of the 29,954,319 individuals in the weighted cross-sectional study population, 15,106,040 (50.4%) were men and 14,848,098 (49.6%) were women. A total of 8.1% of men and 7% of women had hearing impairment. The degrees of drinking with appropriate, risky, and hazardous drinking habits were 58.2, 32.1, and 9.7% among men; and 76.4, 12.5, and 11.1% among women, respectively. Among men, the odds ratio of hearing loss increased by 2.506 times when comparing hazardous and appropriate drinking (confidence interval, 1.083 to 5.800, p=0.002). Moderate alcohol consumption (≤2 drinks per day) was not protective for hearing in either group. Conclusions: As hazardous drinking tends to coexist with hearing impairment in men, appropriate prevention and intervention strategies should be emphasized. A longitudinal study to investigate harmful drinking and the mechanism of hearing loss should be performed.

• 대한청각학회지
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• 제23권2호
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• pp.63-68
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• 2019

Background and Objectives: To investigate the relationship between hearing impairment and alcohol drinking patterns in South Korean adults. Subjects and Methods: Data collection was performed by Korean National Health and Nutrition Survey from January 1 to December 31, 2012. Data analyses were performed from February 20 to March 3, 2018. Data from 3,860 adults 20 years of age or older without a history of malignancy or chronic otitis media in the Korean National Health and Nutrition Survey 2012 database who participated in the health questionnaires, and who had available results from otologic examinations that included pure tone audiogram, were included. Pure-tone average hearing thresholds were calculated at 500, 1,000, 2,000, and 4,000 Hz. Hearing loss was defined as a pure-tone average >40 dB in one or both ears. The Alcohol Use Disorder Identification Test was used to evaluate drinking statuses of subjects. Data were analyzed using the complex-sample χ²-test of independence and a complex-sample logistic regression analysis. Results: Of the 29,954,319 individuals in the weighted cross-sectional study population, 15,106,040 (50.4%) were men and 14,848,098 (49.6%) were women. A total of 8.1% of men and 7% of women had hearing impairment. The degrees of drinking with appropriate, risky, and hazardous drinking habits were 58.2, 32.1, and 9.7% among men; and 76.4, 12.5, and 11.1% among women, respectively. Among men, the odds ratio of hearing loss increased by 2.506 times when comparing hazardous and appropriate drinking (confidence interval, 1.083 to 5.800, p=0.002). Moderate alcohol consumption (≤2 drinks per day) was not protective for hearing in either group. Conclusions: As hazardous drinking tends to coexist with hearing impairment in men, appropriate prevention and intervention strategies should be emphasized. A longitudinal study to investigate harmful drinking and the mechanism of hearing loss should be performed.

• Steel and Composite Structures
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• 제45권2호
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• pp.175-191
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• 2022

A review of previous studies shows that although there is a considerable difference between buckling loads of structures under follower and non-follower lateral loads, only the buckling load of FGM elliptical cylindrical shell under non-follower lateral load was investigated in the literature. This study is the first to obtain the buckling load of elliptical FGM cylindrical shells under follower lateral load and also make a comparison between buckling loads of elliptical FGM cylindrical shells under follower and non-follower lateral loads. Moreover, this research is the first one to derive the load potential function of elliptical cylindrical shell. In this regard, the FGM cylindrical elliptical shell was modeled using the semi-analytical finite strip method and based on the First Shear Deformation Theory (FSDT). The shell is discretized by strip elements aligned in the longitudinal direction. The Lagrangian and harmonic shape functions were considered in the circumference and longitudinal directions, respectively. The buckling pressure of the shell under follower and non-follower lateral loads was obtained from eigenvalue problem. The results obtained from the model were compared with those presented in the literature to evaluate the validity of the model. A comparison index was defined to compare the buckling loads of the shell under follower and non-follower lateral load. A parametric study was carried out to investigate the effects of material properties and shell geometry characteristics on the comparison index. For the elliptical cylindrical shells with length-to-radius ratio greater than 16 and major-to-minor axis ratio greater than 0.6, the comparison index reaches to more than 20 percent which is significant. Moreover, the maximum difference is about 30 percent in some cases. The results obtained from the parametric study indicate that the buckling load of long elliptical cylindrical shell under non-follower load is not reliable.

• 아동학회지
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• 제37권4호
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• pp.17-29
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• 2016

Objective: The purpose of this study was to examine the bidirectional relation between mobile phone dependency (MPD) and self-regulated learning (SRL) of early Korean adolescents in $4^{th}$, $6^{th}$ and $8^{th}$ grade, while taking into account gender differences. Methods: The study made use of panel data from the Korean Children and Youth Panel Study (KCYPS), and three waves of data collected from 2,264 adolescents were analyzed by means of autoregressive cross-lagged modeling. Results: The results can be summarized as follows. Firstly, MPD and SRL were consistently stable for adolescents in $4^{th}$, $6^{th}$ to $8^{th}$ grades. Secondly, a bidirectional relations between MPD and SRL were confirmed. In other words, there was a significant influence of a high level of MPD on a subsequent low level of SRL, and the high level of SRL also had a significant effect on the lower level of MPD across time. According to multi-group analysis, no gender differences were found in the relations between two constructs during the studied period. Conclusion: Findings highlighted not only the necessary media usage education but also parenting intervention strategies may help early adolescents to be prevented from negative effects of media usage and to enhance self-regulated learning ability. Based on the results, more implications were also discussed.

• 한국융합학회논문지
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• 제13권4호
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• pp.521-530
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• 2022

본 연구는 최근 22년 간 정신과 병동 간호사의 소진과 관련된 국내 연구논문의 현황을 분석하여 앞으로의 연구 방향을 제시하기 위한 목적을 두고 시행되었다. 국내 5개의 데이터베이스를 이용하여 문헌을 검색하였고 선정 기준에 맞는 총 14개의 연구가 분석에 포함되었다. 13개 연구가 횡단적 조사연구였으며 1개의 연구가 질적연구였다. 양적 연구 중 정신과 병동 간호사의 소진을 측정한 도구 중 Maslach Burnout Inventory(MBI)가 가장 많이 사용되었다. 정신과 병동 간호사의 소진에 영향을 미치는 개인적 요인은 나이, 결혼 여부, 임상경력, 정신건강간호사 자격증 소지 여부, 월 급여, 종교 여부, 정신과 관련 교육을 받은 횟수였음을 알 수 있었다. 정신과 병동 간호사의 소진에 가장 큰 영향을 미치는 상황적 근무 시 폭력 경험 여부임을 알 수 있었다. 추후 큰 규모의 횡단적 연구와 추적연구가 시행되어야 하며 이를 바탕으로 정신과 병동 간호사의 소진을 감소시키기 위한 중재 연구가 이루어질 필요가 있다.

• 사회복지연구
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• 제42권4호
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• pp.295-327
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• 2011

최근 퇴직에 대한 연구는 활발히 수행되고 있지만, 강제퇴직에 대한 실증연구는 많지 않다. 그러나 우리나라 기업에서 고령자 고용을 기피하는 이유는 연공서열형 임금구조로 지적되기 때문에, Lazear의 연공서열형 모형(1979)은 우리나라 임금근로자의 강제퇴직을 설명하는데 시사점이 클 것으로 예측된다. 이에 본 논문은 Lazear 모형이 우리나라 강제퇴직을 설명할 수 있는지, 고령화연구패널조사(1~2차)를 통해 연구하였다. 분석결과, 임금과 근속기간의 상호작용이 강제퇴직의 주요 결정요인으로 나타났다. 임금소득 증가율이 높은 근로자는 근속기간이 길수록 강제퇴직률이 높아지지만, 임금소득 증가율이 낮은 근로자는 근속기간이 길어도 계속 근로하여, Lazear 모형을 지지한다.

• 가정과삶의질연구
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• 제27권3호
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• pp.31-43
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• 2009

Using the first wave of KLoSA(Korean Longitudinal Study of Ageing) beta version, this study analyzed factors affecting early retired men's subjective life satisfaction through Binary Logit and Multiple Regression. Total 552 men were selected as a sample. The main results of empirical analysis in this study were as follows: The retirement reason(health-) and monthly household income(+) affected whether they were satisfied with the retirement life or not and subjective life satisfaction over all. Especially, the retirement reason(health-) had a stronger effect on whether early retired min were satisfied with the retirement life or not and their subjective life satisfaction than monthly household income revealed significant variable in previous studies. This result represents that the retiree's life satisfaction analysis model must include retiree's characteristics at the time of retirement as well as retiree's current status characteristics or socio-economic characteristics.

• 대한조선학회논문집
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• 제44권1호
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• pp.32-39
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• 2007

A three-dimensional finite element model has been developed to simulate the MIG P/S welding process of two aluminum plates. The finite element calculations are performed using ANSYS finite element code, which takes into account the thermal and mechanical non-linear material properties. The results of finite element analysis compared with those of experiment to show its validity in view of distortions. Parametric studies are carried out on the validated model to assess the effects of various factors on the final residual distortion. Large deformations, temperature dependent material properties are included in the model. Finally, the formulas of fitting curves of angular distortion transverse shrinkage, and longitudinal shrinkage have been proposed.