기후 및 재료 특성을 고려한 교량 신축이음의 기대수명 추정

이진혁,한대석,조한민,박기태,정규산,김건수 한국도로학회 2023 한국도로학회논문집 Vol.25 No.1

PURPOSES : With the recent enactment of the 「Framework Act on Sustainable Infrastructure Management」 in Korea, the establishment of mid- to long-term management plans for social infrastructure and the feasibility evaluation of maintenance projects have become mandatory. To this end, the life cycle cost analysis is essential. However, owing to the absence of a deterioration model, trials and errors are in progress. METHODS : In this study, a deterioration model was established for bridges, which are the representative social infrastructures of roads, particularly for expansion joints that can cause enormous damage to not only the superstructure but also the substructure. The deterioration model was classified into rubber and steel, based on the material of the expansion joint. The analysis used the inspection and climate data conducted in Korea over the last 12 years. The Bayesian Markov Hazard model was applied as the analysis technique. RESULTS : The average life expectancy by type of expansion joint was analyzed to be 8.9 and 6.6 years for rubber and steel, respectively. For probabilistic life cycle cost analysis, the probability distribution of the life expectancy, validity range by confidence level, and Markov transition probability matrix were presented. CONCLUSIONS : In this study, the basis for deterministic and probabilistic life cycle cost analysis of expansion joints was laid. In future studies, it will be necessary to establish a standardized deterioration model for all types of infrastructure, including all bridge elements.

아민형 섬유 이온교환체의 L/D에 따른 크롬 이온 흡착특성

이진혁,황택성,강경석 한국폐기물자원순환학회 2001 한국폐기물자원순환학회 학술대회 Vol.2001 No.1

강염기성 아민화 HPP - g - GMA 이온교환체의 합성과 Urokinase 단백질 분리

이진혁,황택성 한국공업화학회 2001 한국공업화학회 연구논문 초록집 Vol.2001 No.1

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IMT-2000 시스템의 채널 할당 운용전략에 관한 연구 : web 트래픽을 대상으로

이진혁,김재훈,차동완 한국경영과학회 2000 한국경영과학회 학술대회논문집 Vol.- No.1

본 논문은 IMT-2000 시스템 MAC 계층에서의 채널할당 운용에 관한 것이다. 기존의 2 세대 무선이동통신인 셀루라나 PCS 에서는 주로 음성이 주요한 트래픽이었기 때문에 채널 할당에 관한 운용전략이 간단했다. 그러나 무선구간 데이터 트래픽의 급속한 증가는 IMT-2000 시스템의 등장을 가져왔고 이 시스템은 음성과 함께 데이터를 전송하기 때문에 2 세대보다 채널할당이 복잡할 수 밖에 없다. 데이터 트래픽 중 web 트래픽이 주요한 부분이 될 것은 자명하다. 그래서 본 논문에서는 대상이 되는 트래픽을 web 트래픽으로 한정하고, web 트래픽을 크게 2개의 class로 구분했다 : streaming & non-streaming. 그리고 다시 각각의 class 를 2개, 3개의 subclass(type)로 나눴다. 이 구분과 함께 IMT-2000 시스템의 멀티미디어 트래픽 모델링을 사용하여 시뮬레이션을 행했다. 시뮬레이션은 전용채녈, 공용채널의 수, type 별 확률을 변화시키면서 여러 가지 상황을 고려해봤다.

장애 유형별 가구 내 자살생각 군집화 영향요인 분석

이진혁 한국장애인복지학회 2023 한국장애인복지학 Vol.60 No.60

The occurrence of disability makes people with disabilities more vulnerable to suicide clustering, in which suicidal ideation among household members is influenced by each other. This study analyzed the clustering of suicidal thoughts in households by disability type and its influencing factors by applying the SUR bivariate probit model using pairwise data from the '2018 Disability Life Panel Survey' of people with disabilities and their family members. In the final analysis, 1,798 pairs of externally disabled households, 826 pairs of internally disabled households, and 215 pairs of mentally disabled households were selected. The results showed that the risk of suicidal ideation clustering was greater in the order of mentally disabled households, internally disabled households, and externally disabled households, and the variables differed by disability type: in externally disabled households, the risk of suicidal ideation clustering increased with lower disability acceptance of the person with a disability, more spouses in the family compared to children or other family members, and less frequent professional contact for family members. Among households with an internal disability, the risk of clustering suicidal ideation in the household increased with distance to health care facilities. In households with mental disabilities, the risk of clustering suicidal ideation in the household with a person with a disability increased as the family health of family members decreased. Based on the findings, we recommend individualized practical and policy measures that take into account the type of disability to prevent suicide clustering in households with disabilities.

장애인 근로자 고용의 질에 관한 종단연구 : 경증과 중증장애의 차이를 중심으로

이진혁,전진호 한국직업재활학회 2023 職業再活硏究 Vol.33 No.2

본 연구는 경증 및 중증장애인 고용의 질에 종단적으로 영향을 미치는 요인을 살펴보고 비교하는 것을 목적으로 한다. 이를 위해 한국장애인고용패널조사 2차(2017년) ~ 5차(2020년) 자료를 활용하여 경증장애인 근로자 897명과 중증장애인 근로자 213명의 응답 자료를 패널 확률효과 모형으로 분석하였다. 연구결과, 첫째, 중증장애인은 경증장애인보다 고용의 질이 낮은 것으로 나타났다. 둘째, 경증 및 중증장애인 고용의 질에 주관적 사회경제적 지위, 학력, 컴퓨터 활용능력, 장애인 근로자 수, 직장 유형이 공통적으로 종단적 영향을 미치는 것으로 나타났다. 셋째, 중증과 다르게 경증장애인 고용의 질에만 성별, 배우자 유무, 영어 활용능력, 만성질환 보유 여부 변수가 종단적 영향을 미치는 것으로 나타났다. 그리고, 경증과 다르게 중증장애인 고용의 질에 대한 상대적 영향력 크기는 직장 유형, 컴퓨터 활용능력, 주관적 사회경제적 지위 등 순이었다. 본 연구결과를 토대로 장애인 고용의 질을 향상하기 위해 경증과 중증장애인 맞춤형 실천적⋅정책적 방안이 제공되어야 함을 제언하였다. This study aims to examine and compare the factors that longitudinally affect the quality of employment for people with mild and severe disabilities. For this purpose, we used data from the 2nd (2017) to 5th (2020) waves of the Korea Panel Survey of Employment for the Disabled(PSED) to analyze the responses of 897 workers with mild disabilities and 213 workers with severe disabilities, using a panel random effects model. The results found that, first, people with severe disabilities have lower quality of employment than people with mild disabilities. Second, subjective socioeconomic status, education, computer literacy, number of workers with disabilities, and type of workplace have common longitudinal effects on quality of employment for people with mild and severe disabilities. Third, the longitudinal effects of gender, spouse, English language proficiency, and chronic disease status on quality of employment for people with mild disabilities were different from people with mild disabilities. In addition, the relative magnitudes of the effects on employment quality for people with severe disabilities were different from those for people with mild disabilities, in the order of workplace type, computer literacy, and subjective socioeconomic status. Based on the results of this study, it is recommended that practical and policy measures customized for mild and severe disabilities should be provided to improve the quality of employment of people with disabilities.

1PA-14 활성탄소섬유 및 다공성 무기 흡착제를 이용한 Isoprene 의 흡착 거동 연구

이진혁,황택성,박진원,이미경,김광영 한국공업화학회 2000 한국공업화학회 연구논문 초록집 Vol.2000 No.0

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지역사회 거주 발달장애인의 도전적 행동에 영향을 미치는 일상적 지원요인: 성별 차이를 중심으로

이진혁,강희주,정익중 한국장애인복지학회 2023 한국장애인복지학 Vol.61 No.61

There is a lack of empirical research on challenging behaviors in people with developmental disabilities, especially those that consider gender characteristics. Therefore, this study analyzed and compared the frequency and severity of challenging behaviors by gender, and their influencing factors by applying the SUR Tobit model using the ‘2020 Survey of Daily Life and Work of People with Developmental Disabilities’ data. A total of 1,616 men and 723 women with developmental disabilities living in the community were selected for the final analysis. The results showed that the overall pattern of challenging behaviors among women with developmental disabilities was as severe as among men, and that there were influencing factors that differed by gender. That is, for men with developmental disabilities, the frequency and severity of challenging behaviors increased with the experience of daily discrimination and the difficulty of forming new relationships. For women with developmental disabilities, lower cognitive functioning scores were associated with increased frequency and severity of challenging behaviors, and the relative influence of the problematic experience on social service for people with developmental disabilities variable was greatest. Based on the findings, we presented the development of a challenging behavior risk assessment checklist, the provision of multidimensional daily living support programs, and gender sensitive community programs and education as practical and policy measures to prevent frequent and severe challenging behaviors.

고무관련 장비, 실험기기 및 고무재료

이진혁 한국고무학회 2012 고무기술 Vol.13 No.1

활성탄소부직포에 대한 인산 첨착시 열적 거동과 lsoprene에 대한 흡착 동특성

이진혁,황택성,이문수 한국공업화학회 2000 한국공업화학회 연구논문 초록집 Vol.2000 No.1

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