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가방 하중의 크기와 방식에 따른 척추 정적 자세의 변화
박용현,김영관,김윤혁,Park, Yong-Hyun,Kim, Young-Kwan,Kim, Yoon-Hyuk 대한의용생체공학회 2011 의공학회지 Vol.32 No.3
The aim of this study was to investigate the alteration of lumbar spine and trunk postures on different load-carrying types and amounts under static loading. Two load-carrying types(unilateral carrying: UC vs. bilateral carrying: BC) and four different loads(0, 5, 10, and 15 kg) were randomly tested in this study. Carrying a heavy bag would affect human body posture, specifically lumbar spine curvature, which is considered as one of sources of back problems. Previous studies have not paid attention to the approach of the multisegment model of the lumbar spine and trunk. This study separated two compartments of trunk segment(the lumbar and thorax) in the analysis. The multisegment model of the lumbar spine in addition to Helen-Hayes marker set was used. Eight motion analysis cameras and a force plate were utilized. Ten male subjects(mean mass, $70.6{\pm}3.97$ kg; mean height, $178{\pm}4.18$ m) having no musculoskeletal disease participated in this study. We analyzed trunk angles in three anatomical planes and the spinal curvature in sagittal and frontal planes. Increased loading in both UC and BC significantly resulted in increases in trunk forward lean but only UC induced increases in trunk lateral lean. In addition, increased loading in BC produced flatten lumbar curvature in sagittal plane. As far as coupling motion, subjects tended to use axial rotation of the lumbar spine in transverse plane in response to increased UC loading. Finally, it is concluded that the increased static loading in UC rather than in BC tends to causes combined alterations of the spinal postures(sagittal and transverse planes together), which would be vulnerable to improper mechanical stresses on the spine.
박용현,Park, Yong-Hyeon 한국대학교육협의회 2007 大學敎育 Vol.149 No.-
로스쿨 법안 통과 후 국내의 많은 대학들이 사활을 걸고 로스쿨 유치를 위해 사력을 다하고 있다. 이에 로스쿨 유치를 희망하는 대학들 간의 공통된 의견과 함께 대비되는 의견은 무엇인지, 인적·물적 인프라 구축정도 및 교육과정과 교육방법, 대학별 특성화전략 등에 대해 알아봄으로써 우리 대학들이 로스쿨을 어떻게 준비해왔고, 추진해왔는지 살펴보고자 한다.
박용현(Yonghyun Park),황재원(Jaewon Hwang),고영중(Youngjoong Ko) 한국정보과학회 2010 정보과학회논문지 : 소프트웨어 및 응용 Vol.37 No.12
최근 모바일 기기의 발전으로 인하여, PC뿐만 아니라 모바일 기기에서의 정보검색의 요구가 증가하고 있다. 모바일 기기에서 명사를 추출하기 위하여 기존의 언어분석도구를 사용하게 되면, 상대적으로 적은 메모리를 가지고 있는 모바일 기기에는 부담이 되게 된다. 따라서, 모바일 기기에 적합한 언어분석도구의 필요성이 증가하고 있다. 본 논문에서는 대량의 말뭉치로부터 추출한 명사 출현 특성과 후절어를 이용하여 명사를 추출하는 방법을 제안한다. 제안된 명사 추출기는 형태소 분석기를 사용한 기존 명사 추출기의 명사 사전의 약 4% 용량인 146KB의 명사 사전만을 사용함에도 불구하고, 최종적으로 F1-measure 0.86라는 좋은 성능을 얻었다. 또한, 명사 사전에 대한 의존도가 낮으므로, 미등록 명사 추출에 대한 성능이 높을 것으로 예상된다. Since the performance of mobile devices is recently improved, the requirement of information retrieval is increased in the mobile devices as well as PCs. If a mobile device with small memory uses a tradition language analysis tool to extract nouns from korean texts, it will impose a burden of analysing language. As a result, the need for the language analysis tools adequate to the mobile devices is increasing. Therefore, this paper proposes a new method for noun extraction using post-noun morpheme sequences and noun patterns from a large corpus. The proposed noun extractor has only the dictionary capacity of 146KB and its performance shows 0.86 F1-measure; the capacity of noun dictionary corresponds to only the 4% capacity of the existing noun extractor with a POS tagger. In addition, it easily extract nouns for unknown word because its dependence for noun dictionaries is low.
기니 피그에서 콜레시스토키닌 투여가 고탄수화물 , 저지방 , 저단백질식에 의한 색소성 담석의 형성에 미치는 영향
박용현(Yong Hyun Park),서경석(Kyung Suk Suh),김선희(Sun Whe Kim) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.1
N/A W e reported an animal model of pigment gallstone induced by carbohydrate-rich diet main- ly composed with rice. However, the machanisms have not been clearly understood. Under the hypothesis that high-carbohydrate diet (CHO) might induce gallstone formation via the mechanism of the relative bile stasis caused by low secretion of cholecystokin (CCK), the aim of this study was to examine whether exogenous CCK administration inhibits gall- stone formation induced by CHO in guinea pig. Male guinea pigs were divided into 3 groups(Group 1: control chow-fed group, Group 2: high carbohydrate fed group, Group 3: high cabohydrate fed and CCK injected group). High carbo- hydrate diet was 63.2% carbohydrate(45.8% in control chow), mainly composed of rice, and Group 3 received a daily injection of cholecystokinin(0.5nmol/kg). After 6 weeks of feeding, the guinea pigs were sacrificed. The stones were analyzed by infrared spectrophotornetry and gallbladder bile was analyzed by using commercial kits. In group 1, gallstone was found in one case out of 10 animals, in Group 2, 9 out of 14(p<0.05 vs Group 1) and in Group 3, 3 out of 12(p<0 05 vs Group 2). There were no differences in the concentrations of total calcium, total bilirubin, cholesterol, phospholipid and bile acid of gall- bladder bile among 3 groups. The stones were mainly composed of calcium bilirubinate, cho- lesterol, calcium phosphate, and calcium palmitate, which were similar to human calcium bilirubinate stone. The prevalence of stone formation was lowered with administration of CCK in CHO fed animals. A possible mechanism is that exogenous CCK may recover the low CCK release by CHO. It is suggested that bile stasis caused by poor CCK release which may be due to CHO be the one of the contributing factors in the formation of pigment stones in guinea pigs. (Korean J Gastroenterol 1 994; 26: 151 156)