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주파수추종서비스 제공을 위한 다수 배터리전기저장장치(BESS)의 통합제어 전략
유가람(Ga Ram Yu),최우영(Woo Yeong Choi),국경수(Kyung Soo Kook) 대한전기학회 2016 전기학회논문지 Vol.65 No.7
As an Increased penetration level of renewable resources has caused concerns about primary frequency response, an increase in BESS(Battery Energy Storage System) capacity has been expected because of its fast response to the disturbances in the power system. This paper proposes the Integrated Control Strategy of multiple BESS for effectively providing the primary frequency control in the bulk power systems by coordinating the response, SOC and its recovery of BESS. The proposed strategy prevents multiple BESS from providing exceeding response and keeps the balance between SOC of multiple BESS. In addition, It would recover the SOC of BESS efficiently. The effectiveness of the proposed strategy is verified through various case studies employing Korean power system.
( Ga Ram Ahn ),( Hyun Jung Kwon ),( Yu Jin Jang ),( Eun Ja Choi ),( Hee Su Kim ),( Kap Sok Li ),( Myeung Nam Kim ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.2
Background: Cryolipolysis is a noninvasive method for the selective reduction of localized fat tissues. It has demonstrated efficacy in both clinical and preclinical trials; however, despite its popularity, its mechanisms of action and evaluation methods are not yet fully defined. Objectives: The purpose of this study was to improved methods for cryolipolysis using a porcine model. Methods: The abdomens of female Prestige World Genetics (PWG) micro-pigs were treated with a cooling device (CRYOLIPO II™), and we examined photography, three-dimensional photography, ultrasound, gross, and microscopic pathology, and serum lipid level analyses in order to determine the mechanism of action, efficacy, and safety of the device. Results: CRYOLIPO II™ reduced abdominal fat in porcine model. Gross and microscopic histological results confirmed the noninvasive cold-induced selective subcutaneous fat destruction, and showed increases in pre-adipocyte differentiation and in the activation of lipid catabolism. In particular, we found that the device may increase PPARδ (delta) levels in adipose tissue at 30.60 days post-treatment. Conclusion: Fat reduction by cryolipolysis was achieved in our porcine model. Thus, our findings indicate that CRYOLIPO II™ may be a promising fat reduction device for body contouring and fat reduction in humans, and that cryolipolysis exerts its effects, at least partly, by targeting the PPARδ signaling pathway.
Genital tract cavernous hemangioma as a rare cause of postpartum hemorrhage
( Bo Ram Yu ),( Ga Eul Lee ),( Dong Hyu Cho ),( Young Ju Jeong ),( Jeong Heon Lee ) 대한산부인과학회 2017 Obstetrics & Gynecology Science Vol.60 No.5
Cavernous hemangiomas rarely involve the female genital tract. It is difficult to identify vascular malformations when these lesions are concealed in the vagina or deep vulva area. We present a rare case of vaginal cavernous hemangioma in a 30-year-old primiparous woman with an early severe postpartum hemorrhage (PPH) and delayed continuous bleeding from the episiotomy site. She was treated successfully with transarterial embolization of the left vaginal artery. To our knowledge, this is the first reported case of PPH caused by rupture of a vaginal hemangioma during vaginal delivery in English literature.
조가람 ( Ga-ram Jo ) , 김준식 ( Joon-sik Kim ) , 김연수 ( Yeon-soo Kim ) , 유형곤 ( Hyeong-gon Yu ) , 조인환 ( In-hwan Cho ) , 마대중 ( Dae-joong Ma ) , 김운형 ( Woon-hyung Ghim ) , 홍인환 ( In-hwan Hong ) 한국스포츠정책과학원(구 한국스포츠개발원) 2020 체육과학연구 Vol.31 No.1
[목적] 본 연구는 중도시각장애인의 신체활동 참여 소외와 극복과정과 이에 영향을 미치는 요인을 탐색하는 것이다. [방법] 연구목적을 달성하기 위해 성인 중도시각장애인 21명을 연구참여자로 선정하였으며, 반구조화된 면접방법으로 1:1 면담을 진행하여 자료를 수집하였다, 자료의 분석은 Strauss와 Corbin이 제시한 근거이론 분석방법에 따라 개방코딩, 축 코딩, 선택코딩의 순서를 따라 이루어졌다. [결과] 연구결과 총 203개의 개념이 도출되었고, 이를 21개의 하위범주로 구성하였으며 하위범주들의 공통되는 주제를 다시 9개의 주제로 상위범주화할 수 있었다. 구체적인 연구결과는 다음과 같다. 첫째, 중도시각장애인의 신체활동 소외현상에 직접적인 영향을 미치는 요인은 체육시설과 체육프로그램 관련 정보 그리고 전문 지도자의 부재 등과 같은 열악한 제반환경인 것으로 나타났다. 이러한 인과적 조건은 중도시각장애인의 ‘분주한 일상’과 ‘위축된 심리상태’라는 맥락 조건 속에서 ‘여가경험의 상실’이라는 중심현상으로 귀결되었다. 둘째, 건강관리 필요성의 인식 정도와 주변인의 긍정적인 관여 정도에 따라 중도시각장애인들은 운동 효과에 대한 기대를 품게 되었으며 운동 효과에 대한 기대가 크면 클수록 자신을 둘러싼 제약 속에서 제한적으로 신체활동에 다시 참여하게 되었다. 셋째, 이때 참여하게 되는 신체활동의 성격은 건강개선이라는 목적을 달성하기 위한 도구적 의미가 강했다. 이러한 신체활동의 유형은 단순히 심신의 회복을 목적으로만 진행되는 신체활동의 형태이다 보니 이들의 자율성과 흥미를 내재하고 있지 못했다. 그래서 이들은 지속적인 신체활동의 참여를 유지하는데 어려움을 겪었다. [결론] 중도시각장애인의 신체활동 보장을 위한 제반 환경에 대한 개선과 정비가 필요하며 시력과 시야를 상실해가는 초기단기에 있는 중도시각장애인에게 집중적인 신체활동 지원서비스가 제공되어야 할 것이다. 또한, 중도시각장애인 당사자와 보호자를 대상으로 운동의 효과와 가치에 대한 교육과 홍보가 수행되어야 하며 지속적인 신체활동 참여를 위해 운동프로그램을 다양화 및 개발하는 한편 장애 진단을 받기 전 참여했던 운동 종목에 지속적으로 참여할 수 있도록 돕는 방향으로 재정적·정책적 지원이 뒷받침되어야 할 것이다. [Purpose] The purpose of this study is to investigate the alienation and the overcoming process of the physical activity participation of people with Adventitious Visual Impairment(AVI) [Methods] 21 Adults with AVI were recruited and one on one semi-structured interview was conducted. Ground theory was used to analyze the data. Member check, peer debriefing was conducted to enhance the trustworthiness of this study. [Results] As a result, a total of 203 concepts were derived. This consisted of 21 subcategories and the common themes of the subcategories were categorized into nine categories. Specific results are as follows. First, the physical activity of people with AVI was directly affected by the sports facilities, physical activity programs, and professional instructor. This causal condition resulted in the loss of leisure experience in the context of the busy daily life and the depressed psychological state. Second, due to the perceived need of health care and the positive involvement of others, people with AVI came to expect the effect of exercise. Third, people with AVI participated in physical activity again as a tool to achieve the purpose of health improvement. This type of physical activity has a limitation that it can not guarantee the continuity of physical activity due to the limitation that it does not contain autonomy and interest of people with AVI. [Conclusion] Based on these results, the following suggestions were made. First, it is necessary to improve the environment for ensuring participation in physical activity of people with AVI. Moreover education and promotion of the effects and values of the exercise should be carried out for people with AVI and their guardians. Second, it is necessary to diversify physical activity types and reconstruct existing exercise programs.