Characteristics of a Current‑Limiting DC Circuit Breaker with a Superconducting Coil Applied to the Commutation Circuit

Hye‑Won Choi,Sang‑Yong Park,최효상 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4

We research team has proposed a current-limiting superconducting DC circuit breaker that combines a High-temperature superconducting wire (HTS) with a DC circuit breaker, and secured its operation performance in our previous study via simulation. In this paper, we designed and produced an actual current-limiting superconducting DC circuit breaker, as well as analyzed its current limiting and breaking performance. In addition, the operation characteristics at diferent lengths of the HTS with increasing voltage were analyzed. The operation reliability of the proposed DC circuit breaker was demonstrated by a simulation system that was built similar to the actual system.

A Linear Regressional Analysis of With-PPs in English

( Hye Won Choi ) 경희대학교 언어연구소 2012 언어연구 Vol.29 No.1

Gaol, Hye-Won, 2012, A Linear Regressional Analysis of Pith-Its in English, Linguistic Research 29(1), 21-44. Building up on Choi`s (2011) research that identifies the features of the instrument-taking predicates that influence the presence of instrument with-PPs, the current study explores to analyze the BYU-BNC corpus data of instrument with-PPs with a linear regression model. By building a multiple linear regression model which can deal with identified predictor variables simultaneously, this paper tries to explain the frequencies of instrument with-PPs and their nature of argumenthood by combinations of predictor variables. This modeling analysis can be a useful step toward studying gradient argumenthood via a more complex evaluation of a variety of morphological, syntactic, and semantic factors.

Verb class and instrument PPs: A mixed model analysis

( Hye-won Choi ) 경희대학교 언어정보연구소 2017 언어연구 Vol.34 No.2

This paper investigates whether a lexical variance caused by verbs influences the choice and frequency of instrument with-PPs. The corpus data shows that observations grouped by verb class demonstrate systematically different behaviors and this individual variance of verb classes can be captured by means of a random effect of a mixed-effects model. Building up on Choi`s (2012) research that identifies the syntactic, semantic, and morphological factors that influence the presence of instrument with-PPs as fixed effects, the current study classifies the instrument-taking verbs into verb classes, based on Levin`s (1993) study, and builds a mixed-effects model taking verb class as a random variable. The new statistical technique of hierarchical, multi-level, mixed-effects modeling (Baayen 2008; Bresnan et al. 2007; Gelman and Hill 2007; Johnson 2008; Kuperman 2009; Pinheiro and Bates 2000) can process across-word fixed effects and by-word random effects together. By taking into consideration the subtle syntactic and semantic characteristics of verbs, this new modeling analysis provides a way to incorporate native speakers` lexical knowledge into grammar. (Ewha Womans University)

Capturing Lexical Variance with a Mixed Model : Verb in Ordering Variation

Hye-Won Choi 담화·인지언어학회 2010 담화와 인지 Vol.17 No.1

Based on the dative data collected from Sejong Corpus (Kim 2000), Choi (2010) has analyzed the word order variation and proposed a statistical model of logistic regression that identifies all predictive variables that influence word order and predicts which order (between 'dative before accusative' (DA) and 'accusative before dative' (AD)) is more likely to occur, given the predictor variables. Building up on the Choi's (2010) analysis, this paper investigates whether a lexical variance caused by word is also affecting the choice of dative word order. In particular, variation caused by the verbs of dative construction is examined in depth, and verb is indeed proved to be a significant random variable. To capture the new random effect by verbs, as well as the fixed effects identified in Choi (2010), this paper proposes a new mixed model that considers fixed and random effects together (Bresnan et al. 2007, 2008, 2009, Baayen 2008, Johnson 2008). The mixed model turns out to be a more powerful model that secures higher accuracy in its predictions.

Minimal invasive surgery (LESS) for huge cystic adnexal tumors in whole abdomen

( In Young Choi ),( Ji Hye Lee ),( Mi Hyun Park ),( Ji Kwoun Park ),( Jeong Kyu Shin1 ),( Won Jun Choi1 ),( Soon Ae Lee ),( Jong Hak Lee ),( Won Young Paik ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-

Laparoendoscopic single-site surgery (LESS) is helpful if not an evidence of suspicious malignancy in huge adnexa tumors. This approach might be reasonable alternative to conventional laparoscopic surgery. We report two cases with LESS for huge cystic adnexal tumors in whole abdomen. A 58 years old multigravida woman in menopause underwent removal of a huge cystic adnexal mass that occupied her entire abdomen by LESS.(ca.5200ml aspiration) A 15 years old single nulligravida woman had a huge cystic adnexal tumor in whole abdomen reaching to the level of the xyphoid process. A needle through the transumbilical single port was inserted directly under the mass. Subsequently, 8000 ml of cystic fluid was aspirated without spillage.

우리나라 노인여성의 골다공증성 척추골절로 인한 경제적 부담 추계

강혜영,강대룡,장영화,박성은,최원정,문성환,양규현,Kang, Hye-Young,Kang, Dae-Ryong,Jang, Young-Hwa,Park, Sung-Eun,Choi, Won-Jung,Moon, Seong-Hwan,Yang, Kyu-Hyun 대한예방의학회 2008 예방의학회지 Vol.41 No.5

Objectives : To estimate the economic burden of osteoporotic vertebral fracture (VF) from a societal perspective. Methods : From 2002 to 2004, we identified all National Health Insurance claims records for women ${\geq}50$ years old with a diagnosis of VF. The first 6-months was defined as a "clearance period," such that patients were considered as incident cases if their first claim of fracture was recorded after June 30, 2002. We only included patients with ${\geq}$ one claim of a diagnosis of, or prescription for, osteoporosis over 3 years. For each patient, we cumulated the claims amount for the first visit and for the follow-up treatments for 1 year. The hospital charge data from 4 hospitals were investigated to measure the proportion of the non-covered services. Face-to-face interviews were conducted with 106 patients from the 4 study sites to measure the out-of-pocket spending outside of hospitals. Results : During 2.5 years, 131,453 VF patients were identified. The patients had an average of 3.38 visits, 0.40 admissions and 6.36 inpatient days. The per capita cost was 1,909,690 Won: 71.5% for direct medical costs, 20.6% for direct non-medical costs and 7.9% for indirect costs. The per capita cost increased with increasing age: 1,848,078 Won for those aged 50-64, 2,084,846 Won for 65-74, 2,129,530 Won for 75-84and 2,121,492 Won for those above 84. Conclusions : Exploring the economic burden of osteoporotic VF is expected to motivate to adopt effective treatment options for osteoporosis in order to prevent the incidence of fracture and the consequent costs.

Analyzing and Predicting Ordering Choices in Korean with a Logistic Regression Model

Choi,Hye-Won 한국언어학회 2010 언어 Vol.35 No.1

개에서 발생한 만성 단독 비장 염전의 진단 및 치료 1례

이혜원,최호정,김명철,정성목 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1

A 5-year-old German Shepherd dog(intact male, 27kg) was admitted to the Veterinary Medical Teaching Hospital of Chungnam National University with the history of anorexia and vomiting. On physical examination, he was depressed and had abdominal distention. A complete blood count indicated leukocytosis and anemia. Radiographic findings included a large soft tissue mass in the middle to caudal abdomen and loss of serosal detail. Ultrasonographs showed splenomegaly with mixed ethoic parenchyma, hyperechoic area around the splenic hilus, and loss of venous flow. Computed tomography revealed enlarged spleen with partially enhanced parenchyma. Chronic isolated splenic torsion was diagnosed and splenectomy was performed. Histopathologic examination revealed chronic passive congestion of the spleen. He was recovered normally after surgery without any complications.

Drosophila melanogaster에 있어서 Methyl methanesulfonate의 영향에 대한 생리유전학적 연구

최혜영,최영현,이원호,최주수 동의대학교 기초과학연구소 1998 基礎科學硏究論文集 Vol.8 No.1

Methyl methanesulfonate (MMS) was fed to Drosophila melanogaster in order to investigate its toxic capability at developmental and adult stages, and the hereditary effect of toxicity and the potency for induction of sex-linked lethal mutation during the spermatogenesis by the means of an attached-X method. In the control group, the egg to adult viability of D. melanogaster was 95.2%, while 3.5mM and 5.0mM treated groups were 90.0% and 84.1%, respectively. In the case of their progenies (F₁), the viability was 96.9% in the control group, while 3.5mM and 5.0mM treated groups were 54.5% and 1.6%, respectively. Therefore, these differences between two generations show significant physiological toxic effects in the next generation. In the parental generation, the developmental time was calculated 11.05 days in the control group, 12.43 days in 3.5%mM treated group, and 13.23 days in 5.0mM. In the case of F₁it was estimated 10.35 days in the control group, and 11.43 days in 3.5mM treated group. Compared with the control groups in two generation, the developmental time generally delayed as the dose of MMS increased. As to the sex-ratio, there was no differences between the control and MMS treated groups. The toxic values of adult stage showed which increased the frequency of mortality with MMS concentrations. The mortality at 120hr in the control group was 1.67% and it in 0.5mM MMS treated group 3.33%. In 2.5mM MMS treated group, it was 33.3% at 72hr, and it 95% at 120hr. The increase of the morality was shown from 72hr in 4.0mM treated group which was 100% at 96hr. There was the concentration-dependent induction of sex-linked lethal mutation during the spermatogenesis by means of an attached-X method, MMS had more pronounced effect in sperm and spermaid stages in D. melanogaster.

대학생의 가족주의 가치관과 부모부양의식에 관한 연구

최승원,정혜정,서병숙 漢陽大學校 韓國生活科學硏究所 1997 韓國 生活 科學 硏究 Vol.- No.15

The purpose of this study is to investigate the trend of the familism and the awareness of parent-supporting, how socio-demographic variables affect the concept of familism and how the concept of familism affact the awareness of parent-supporting. The data were collected from 191 university students. A brief summary of the result of this study is as following: (1) Most respondents appeared to have the modern familism-individualism. (2) The awareness of parent supporting was reported highly: the order of the awareness of parent supporting was as follow : financial supporting, service supporting, emotional supporting. (3) Male students tran lemale ones and the older group than younger ones have the traditional familism. The male students have higher awareness of financial supporting than emale students. The older group than younger ones have high awareness of emotional supporting. The respondents who have the older father than younger ones have high service supporting. (4) The socio-demographic variable which affects on the familism is sex; male students have more the concept of traditional tendency than female students haute. (5) The variable which affects the awareness of parent supporting strongly is the familism. That is to say, the more the familism, the more the awareness of the parent supporting.