The Unique Role of Novel Cellulosomal Subunit in Clostridium cellulovorans Explored by Cohesin Marker Related to Binding on Insoluble Cellulosic Substrate

SoHyeong KIM,SangDuck SANG,SuJung KIM,JeongEun HYEON,BomYi PARK,SungOk HAN 한국생물공학회 2015 한국생물공학회 학술대회 Vol.2015 No.10

Discrepancy Between Desired Time in Bed and Desired Total Sleep Time, Insomnia, Depression, and Dysfunctional Beliefs About Sleep Among a Clinical Sample of Patients With Insomnia

Sohyeong Kim,Eulah Cho,Hayun Choi,Seockhoon Chung 대한신경정신의학회 2024 PSYCHIATRY INVESTIGATION Vol.21 No.9

Objective This study investigated whether the discrepancy between desired time in bed and desired total sleep time (DBST) index could be a meaningful indicator for assessing insomnia severity in a clinical sample of patients with insomnia. Furthermore, we sought to identify the mediators of the association between DBST and insomnia severity in individuals with insomnia. Methods We collected the medical records of 127 patients with insomnia. Each participant’s DBST index was calculated using sleep indices, including time and duration variables. Psychological symptoms were investigated using the Insomnia Severity Index (ISI), Patients Health Questionnaire-9 items (PHQ-9), Generalized Anxiety Disorder-7, Dysfunctional Beliefs and Attitudes about Sleep-16 items (DBAS-16), and Epworth Sleepiness Scale. Results The DBST index was significantly correlated with the ISI (r=0.20, p<0.05), desired total sleep time (r=-0.52, p<0.001), and desired time in bed (r=0.32, p<0.01). Linear regression analysis revealed that insomnia severity was associated with age (β=-0.18, p=0.018), DBST (β=0.23, p=0.003), PHQ-9 (β=0.23, p=0.031), and DBAS-16 (β=0.42, p<0.001). The DBST directly influenced insomnia severity, although indirect effects of mediators were not significant. Conclusion The DBST index directly influenced insomnia severity regardless of the mediating effects of psychological factors among a clinical sample of patients with insomnia. This finding implies that the DBST index can be a simple measure of insomnia severity, even among patients with insomnia. Psychiatry Investig 2024;21(9):971-978

Korea Citation Index and Its Macro Bibliometrics

Kim, Sohyeong,Choi, Taejin,Yoon, Aeran,Seol, Sung-Soo Asian Society for Innovation and Policy 2013 Asian Journal of Innovation and Policy Vol.2 No.2

This paper introduces the Korea Citation Index (KCI) and also some macro statistics of KCI. KCI started service since 2008 by the National Research Foundation of Korea (NRF), but the data has been gathered from 1998. Our findings are as follows: heavy reliance on books in humanities, but papers as the main reference in all other disciplines. Impact factor is an increasing trend in all disciplines. Social science has the highest impact factor among all fields. In some fields even in science and engineering areas, there are more KCI papers than Korean JCR papers and impact factors of the KCI are higher than JCR. As for the distinction between nationally and internationally fields or journals, some disciplines in social science are clearly nationally oriented. NSE journals listed in both KCI and JCR, however, are not clear in terms of impact factor, but clear in terms of the numbers of papers.

담수 사용 NaBH₄ 가수 분해반응에 의한 수소발생

오소형 ( Sohyeong Oh ),유동근 ( Donggeun Yoo ),김태호 ( Taeho Kim ),김익균 ( Ikgyun Kim ),박권필 ( Kwon-pil Park ) 한국화학공학회 2021 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.59 No.4

Sodium borohydride, NaBH₄, has many advantages as hydrogen source for portable proton exchange membrane fuel cells (PEMFC). When PEMFC is used outdoors as a transport type, it is economical to hydrolyze NaBH₄ using fresh water instead of distilled water. Therefore, in this study, hydrogen was generated using fresh water instead of distilled water during the NaBH₄ hydrolysis process. The properties of NaBH₄ hydrolysis were studied using an activated carbon-supported Co-P-B/C catalyst. Fresh water did not generate tetrahydrate during the NaBH₄ hydrolysis process, and distilled water produced tetrahydrate by-products, which consumed a lot of water during the hydrolysis process, indicating that at the end of the reaction at a high concentration of 25% or more of NaBH₄, dry by-products and unreacted NaBH₄ remained. As a result, when fresh water was used, the hydrogen yield and hydrogen generation rate were higher than that of distilled water at a high concentration of 25% or more of NaBH₄, indicating that it is suitable for use in transport-type fuel cells such as unmanned aerial vehicles.

장기요양서비스 공공성 실천 가능성 탐색: 사회적협동조합 운영 사례 분석

김연희 ( Kim Yeonhee ),김소형 ( Kim Sohyeong ),김지우 ( Kim Jiwoo ) 한국장기요양학회 2024 장기요양연구 Vol.12 No.2

본 연구는 장기요양서비스를 제공하는 사회적협동조합 운영 사례분석을 통해 장기요양서비스 공공성 강화의 실천적 시사점을 살펴보고자 하였다. 이를 위해 공공성 지표의 내용을 내용적 차원, 절차적 차원, 수단적 차원, 적용 범위의 4가지로 설정하여 활동을 분석하였다. 분석 결과, 연구사례는 이용자 욕구 중심의 지속 가능한 서비스를 제공하며 품질관리를 하고 있었다. 이용자 감소로 인해 일자리가 중단되는 고용불안을 방지하기 위한 교육훈련 및 일자리 연계를 위한 노력이 있었다. 그리고 모든 구성원이 참여할 수 있는 의사결정 구조 및 지역사회 네트워킹을 통한 상호연대의 실천 노력이 발견되었다. 다중이해관계자 조직형태로서 이용자, 공급자, 지역주민까지 참여하는 공동생산 방식을 실천하며 장기요양서비스 제공의 공공성을 구현하고자 다각도로 노력하고 있었다. 본 연구를 통해 장기요양서비스의 공공성을 보다 강화하기 위해서 상호의존으로서의 돌봄에 관한 시민사회 인식 전환을 위한 노력, 다양화된 공급주체 중 민간영리 공급기관의 공공성 강화를 위한 노력과 실천을 견인할 제도적 보완, 서비스 제공기관에 대한 법인화 및 사회적 목적 실현을 위한 운영주체 설립과 육성의 필요성을 제안하였다. This study aims to examine the practical implications for strengthening the public nature of long-term care services through an analysis of the operation cases of social cooperatives providing long-term care services. To this end, the activities were analyzed by setting the contents of the publicness indicators into four dimensions: substantive, procedural, instrumental, and scope of application. As a result of this analysis, the study case was providing sustainable services centered on user needs and quality control. In addition, efforts were made to provide education and training and link jobs to prevent job instability due to a decrease in users. A decision-making structure in which all members can participate in operation and efforts to practice mutual solidarity through community networking were discovered. As a multi-stakeholder organizational form, efforts were made in various ways to realize the publicness of long-term care service provision by practicing a co-production method in which users, suppliers, and local residents participate. To further strengthen the publicness of long-term care services, the study suggested the following: efforts to shift civic awareness regarding care as interdependence, institutional measures to drive efforts and practices to enhance the publicness of for-profit supply institutions among diversified providers, and the need to establish and expand operating entities for the incorporation and realization of social purposes in service providing organizations.

활성탄 담지 Co-B/C, Co-P-B/C 촉매를 이용한 NaBH₄ 가수분해 반응

오소형 ( Sohyeong Oh ),김유겸 ( Youkyum Kim ),배효준 ( Hyojune Bae ),김동호 ( Dongho Kim ),변영환 ( Younghwan Byun ),안호근 ( Ho-geun Ahn ),박권필 ( Kwon-pil Park ) 한국화학공학회 2018 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.56 No.5

Sodium borohydride, NaBH₄, shows a number of advantages as hydrogen source for portable proton exchange membrane fuel cells (PEMFCs). Properties of NaBH4 hydrolysis reaction using activated carbon supported Co-B/C, Co-P-B/C catalyst were studied. BET surface area of catalyst, yield of hydrogen, effect of NaBH₄ concentration and durability of catalyst were measured. The BET surface area of carbon supported catalyst was over 500 m²/g and this value was 2~3 times higher than that of unsupported catalyst. Hydrogen generation of activated carbon supported catalyst was more stable than that of unsupported catalyst. The activation energy of Co-P-B/C catalyst was 59.4 kJ/mol in 20 wt% NaBH₄ and 14% lower than that of Co-P-B/FeCrAlloy catalyst. Catalyst loss on activated carbon supported catalyst was reduced to about 1/3~1/2 compared with unsupported catalyst, therefore durability was improved by supporting catalyst on activated carbon.

생태학 분야 데이터 저널 발행 전략 연구 - K기관을 중심으로 -

정영임,권오석,김기동,김소형,서태설,김선태,Jung, Youngim,Kwon, Ohseok,Kim, Kidong,Kim, Sohyeong,Seo, Tae-Sul,Kim, Suntae 한국도서관·정보학회 2020 한국도서관정보학회지 Vol.51 No.4

오픈 사이언스 시대 연구데이터의 공개를 가속화하고 접근성 및 인용가능성 개선 및 연구데이터에 대한 표준화된 기술문서 제공은 또 다른 과학적 발견에 기여할 수 있어 데이터 출판이 주목을 받고 있다. 또한 출판된 데이터 역시 연구논문과 동등한 지위를 유지할 수 있는 방안으로 데이터 논문이 대두되고, 새로운 학술출판의 유형으로 데이터 저널 발간이 증가추세에 있다. 특히 생태학 분야는 대규모 연구데이터가 생산되고 관리되어야 하는 분야로 전세계적으로 데이터 저널 발간이 활발하다. 반면 국내에는 데이터 저널 연구가 초기 단계이고, 생태학 분야 데이터 저널이 전무하다. 이에 본 연구에서는 생태 분야의 데이터 저널을 발간하기 위한 전략을 탐색하고 제시하였다. 먼저 국내외 데이터 저널 발간 현황과 국내 저널 출판 현황을 조사하였다. 또한 학술출판 및 오픈액세스 정책 전문가, 생태학 학술지 발간 전문가로 구성된 전문가그룹 인터뷰를 수행하였다. 현재 데이터 저널 발간 인프라가 제대로 구축되지 않고 이에 대한 평가체제가 갖추어 지지 않은 국내 학술출판 관행을 반영하고 국내외 조사결과와 전문가 FGI를 실시 결과를 바탕으로 생태학 분야 데이터 저널 출간 방향, 데이터 논문 투고지침, 저널 구성 및 발행주기, 저널 편집위원 구성, 원고의 수급 측면에서 전략을 제시하였다. The importance of data publishing in the open-science era is increasing as it can contribute to other scientific discoveries by accelerating the sharing of research data, improving accessibility and citability, and providing standardized technical documentation for research data. In addition, the need for data papers is emerging as a way for data papers to maintain a status equivalent to research papers, and the publication of data journals is on the rise as a new type of scholarly publishing. In particular, the field of Ecology is a field where large-scale research data are produced and managed, thus the data journal publishing in this field is active worldwide. On the other hand, the research on data journal is in its early stages in Korea, and there is no data journal in the field of Ecology. Thus, this study explores and presents strategies for publishing data journals in the ecological field. First, we investigate the publishing status of domestic and international data journals and the publication status of domestic journals. Then, we conducted a focused group interview with experts of scholarly publishing, open access policy and journal publishing in the field of Ecology. Finally, based on the survey and the expert FGI's results, strategies are suggested in terms of publishing data journals in the field of ecology, organizing and publishing journals, organizing journal editors, and receiving manuscripts.

No Association Between Insomnia Severity, and Discrepancy Between Desired Time in Bed and Desired Total Sleep Time Among Shift-Working Nursing Professionals

Bzeih Wafaa,Kim Sohyeong,Yi Kikyoung,Chung Seockhoon 대한수면학회 2023 sleep medicine research Vol.14 No.3

Background and Objective This study aimed to explore whether the discrepancy between a patient’s desired time in bed and desired total sleep time (DBST index) can be used as a tool to assess the insomnia severity of shift-working nursing professionals.Methods Two studies were conducted during two different times among two groups of shiftworking nursing professionals working in COVID-19 inpatient wards (study I), or nurses who witnessed patient death during the previous 2 years (study II), using a single voluntary survey. The survey was completed by a total of 366 participants: 226 in the first study, and 140 in the second. Participants’ age, sex, marital status, and past psychiatric history were collected. In addition to questions regarding the DBST index, the Glasgow Sleep Effort Scale (GSES), Dysfunctional Beliefs about Sleep-2 items (DBS-2), and the Insomnia Severity Index (ISI) were assessed.Results In both studies, the DBST index did not reflect insomnia severity, preoccupation with sleep, or dysfunctional beliefs about sleep in the linear regression analysis. In addition, ISI was expected by GSES (β = 0.67 in study I, β = 0.62 in study II, all p < 0.001) and DBS-2 (β = 0.16 in study II, p = 0.020), but not by the DBST index.Conclusions It was observed that the DBST index was not significantly associated with insomnia severity, preoccupation with sleep, or dysfunctional beliefs about sleep in two studies done among shift working-nursing professionals.

Changes in Insomnia Severity are Associated With the Changes in Discrepancy Between Desired Time in Bed and Desired Total Sleep Time Among the General Population

Seockhoon Chung,Sohyeong Kim,Inn-Kyu Cho,Dongin Lee,Jiyoung Kim,Eulah Cho 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.12

Objective The discrepancy between desired time in bed and desired total sleep time (DBST index) is correlated with the severity of insomnia among the general population. This study aimed to explore whether the change in DBST index is associated with changes in insomnia severity.Methods The study was conducted as a single source tracking online survey among the general population. The first survey (T1) was completed by all 399 participants, and the second survey (T2) was completed by 233 participants 5–6 weeks after the T1 survey with a simple instruction of reducing the DBST index. Participants’ age, sex, marital status, past psychiatric history, and sleep patterns were collected. In addition to the DBST index, the Glasgow Sleep Effort Scale (GSES), Dysfunctional Beliefs about Sleep-2 items (DBS-2), and Insomnia Severity Index (ISI) were rated.Results The change in the ISI (T1–T2) was significantly correlated with the changes in the GSES (r=0.24, p<0.001), DBS-2 (r=0.22, p<0.001), and DBST index (r=0.15, p=0.020). The change in insomnia severity was expected with change in the GSES (β=0.23, p<0.001), DBS-2 (β=0.20, p=0.002), and DBST index (β=0.13, p=0.037). Mediation analysis showed that change in DBST index directly influenced change in insomnia severity and change in GSES or DBS-2 did not mediate the relationship.Conclusion Changing the DBST index can be a simple way to reduce insomnia severity among the general population.

Cathode 개방형 고분자연료전지 스택 내구성 평가

유동근 ( Donggeun Yoo ),김현석 ( Hyeonsuck Kim ),오소형 ( Sohyeong Oh ),박권필 ( Kwon-pil Park ) 한국화학공학회 2022 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.60 No.1

Cathode open-type PEMFC (Proton Exchange Membrane Fuel Cells) stacks, which are widely used in small transport-type PEMFC, have a problem with poor durability. Through the accelerated durability test of the 13-cell PEMFC stack, we tried to find the cause of the degradation of the stack and to contribute to the improvement of the durability of the cathode open stack. A hydrogen/air boundary is formed during start-up/shut-down (SU/SD) due to the structural problem of the cathode open stack in which the cathode is open to the atmosphere and it is difficult to maintain airtightness, thereby deteriorating the cathode. In this study, it was possible to evaluate the durability in a relatively short time by reducing the 54% of the initial performance by repeating SU/SD 1,800 times on the cathode open stack. After dismantling the stack, each cell was divided into two and the performance was analyzed. Overall, the anode outlet MEA, which facilitates air inflow, showed more severe electrode deterioration than the inlet MEA, confirming that the hydrogen/air boundary formation during SU/SD is the main cause of degradation.