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Heejoo Ko(Heejoo Ko),Dohwan Kim(Dohwan Kim),Seong-Sik Cho(Seong-Sik Cho),Mo-Yeol Kang(Mo-Yeol Kang) 한국역학회 2023 Epidemiology and Health Vol.45 No.-
OBJECTIVES: The physical activity paradox suggests that occupational physical activity (OPA), unlike leisure-time physical activity (LTPA), may detrimentally impact health. We explored the relationships of OPA and LTPA with work ability (WA) and health-related productivity loss (HRPL). METHODS: This study included 5,501 workers in Korea who were recruited in 2021 through a web-based cross-sectional questionnaire. The questionnaire was utilized to quantify OPA and LTPA in metabolic equivalents, while WA and HRPL were also measured. Non-parametric regression, using a generalized additive model (GAM), was employed to visualize the relationships of LTPA and OPA with WA and HRPL. Mean differences in WA and HRPL, in relation to OPA and LTPA, were examined using linear regression models. These models were adjusted for covariates including sex, age, body mass index, education level, alcohol consumption, smoking history, insomnia, occupation, hours worked, and income. RESULTS: The GAM and linear regression analyses revealed that higher LTPA corresponded with higher WA and lower HRPL. In contrast, as OPA increased, WA decreased and HRPL increased. However, within the group with high OPA, HRPL was not significantly lower in the high-LTPA subgroup relative to the low-LTPA subgroup (mean difference=1.92%, p=0.343). This pattern was especially pronounced among workers aged 60 years and older, with an increase in HRPL observed with increasing LTPA among the respondents with high OPA. CONCLUSIONS: High LTPA levels were associated with elevated WA and diminished HRPL. In contrast, higher levels of OPA were associated with lower WA and higher HRPL.
Leukemic stem cell phenotype is associated with mutational profile in acute myeloid leukemia
( Heejoo Han ),( Ja Min Byun ),( Dong-yeop Shin ),( Sung-soo Yoon ),( Youngil Koh ),( Junshik Hong ),( Inho Kim ),( Chansup Lee ),( Hyeonjoo Yoo ),( Hongseok Yun ),( Man Jin Kim ),( Sung Im Cho ),( Mo 대한내과학회 2021 The Korean Journal of Internal Medicine Vol.36 No.2
Background/Aims: Understanding leukemic stem cell (LSC) is important for acute myeloid leukemia (AML) treatment. However, association of LSC with patient prognosis and genetic information in AML patients is unclear. Methods: Here we investigated the associations between genetic information and the various LSC phenotypes, namely multipotent progenitor (MPP)-like, lymphoid primed multipotent progenitor (LMPP)-like and granulocyte-macrophage progenitors (GMP)-like LSC in 52 AML patients. Results: In secondary AML patients, MPP-like LSC was significantly higher than de novo AML (p = 0.0037). The proportion of MPP-like LSC was especially high in post-myeloproliferative neoplasm AML (p = 0.0485). There was no correlation between age and LSC phenotype. Mutations of KRAS and NRAS were observed in MPP-like LSC dominant patients, TP53 and ASXL1 mutations in LMPP-like LSC dominant patients, and CEBPA, DNMT3A and IDH1 mutations in GMP-like LSC dominant patients. Furthermore, KRAS mutation was significantly associated with MPP-like LSC expression (p = 0.0540), and TP53 mutation with LMPP-like LSC expression (p = 0.0276). When the patients were separated according to the combined risk including next generation sequencing data, the poorer the prognosis, the higher the LMPP-like LSC expression (p = 0.0052). This suggests that the dominant phenotype of LSC is one of the important factors in predicting the prognosis and treatment of AML. Conclusions: LSC phenotype in AML is closely associated with the recurrent mutations which has prognostic implication. Further research to confirm the meaning of LSC phenotype in the context of genetic aberration is warranted.
조희주,정연하,황태연 한국전과정평가학회 1999 한국전과정평가학회지 Vol.1 No.1
본 논문은 삼성전자에서 수행한 컴퓨터의 전과정평가 결과를 요약한 것이다. 컴퓨터의 환경성을 정량적으로 분석하여 환경친화적인 제품의 개발을 위한 기초 데이터를 축적하기 위해 컴퓨터의 전과정평가를 수행하였다. 대상제품은 Pentium Ⅱ 프로세서를 장착한 데스크탑 컴퓨터 본체와 17인치 모니터로 구성된 컴퓨터 1세트이다. 현장 데이터를 위주로 부품 및 제품 제조 공정 데이터를 수집하였으며, 현장데이터의 수집이 어려운 물질 생산 및 에너지 관련 데이터는 문헌 데이터를 활용하였다. 목록분석을 거쳐 무생물자원고갈, 지구온난화, 성층권내 오존감소, 광화학산화물 생성, 산성화, 부영양화, 인간독성, 생태독성 8개 영향범주의 환경영향을 정량화하였으며, 이를 정규화 및 가중치 부여를 통해 단일한 환경영향지수값으로 통합하였다. 컴퓨터의 전과정에 걸친 환경영향의 54.8%가 사용단계에서 기인하는 것으로 나타났으며, 모니터, 주기판(Mother Board), 전원공급장치(SMPS), 모뎀(Modem), 하드디스크(HDD) 등의 주요 부품의 제조로 인한 환경영향이 비교적 큰 것으로 분석되었다. 본 연구의 결과는 컴퓨터의 환경성을 향상시키기 위한 방안 수립을 위한 기초 데이터로서 사용되고 있으며, 국내외 구매자에 대한 환경정보 제공을 위해 활용되고 있다. The life cycle assessment on a computer is performed in order to identify the environmental impacts during the life cycle of a computer and to establish the database to develop environmentally friendly computers. This article contains simplified results from the life cycle assessment on a computer. A desktop PC set that consists of a PC mainframe (including Pentium Ⅱ processor) and a monitor (having 17-inch screen) is chosen as the functional unit for this study. Site-specific data are collected for the component production processes and the assembly processes. Material production and energy related data are derived from literature since it is too difficult to collect site-specific data for those. The impact categories considered in this study are abiotic resource depletion, global warming, stratospheric ozone depletion, photochemical oxidant creation, acidification, eutrophication, human toxicity and eco-toxicity. The characterization results are integrated into single value through normalization and weighting. The use phase in the life cycle of a desktop PC is the most major contribution as 54.8% of total impact assessment value. And other major contributing components in production are monitor, mother board, SMPS, modem, HDD and so on. The results from the life cycle assessment on a computer are used to establish the strategy for improving environmental performance of computer and to provide environmental information of the product to customers.
김희주 ( Kim Heejoo ),조성희 ( Cho Sunghui ),김지혜 ( Kim Jihae ) 한국가족사회복지학회 2017 한국가족복지학 Vol.56 No.-
Korean unwed mothers and their families often experience discriminatory and unfair treatment in their everyday lives. However, there has been little research examining discrimination against unwed mothers and its effects on these women`s lives. Therefore, further studies are needed to identify and assess types and degree of discrimination against unwed mothers. This study aims to investigate and develop a reliable and valid measurement scale of experiences of discrimination for Korean unwed mothers. For developing the scale, the researchers constructed a concept and sub factors, and the pre-scale of 75 items of discrimination experiences of unwed mothers by conducting a literature review and focus groups interviews, Validity and reliability of the scale were tested by carrying out an item quality analysis, a exploratory factor analysis, a correlation analysis, a criterion validity test and a reliability analysis, The scale of 21 items was constructed with three dimensions. This study is significant that it provides the scale of discrimination for Korea unwed mothers with high reliability and validity to identify and verify types and degree of discrimination experiences of unwed mothers.