Age-dependent differences of treadmill exercise on spatial learning ability between young- and adult-age rats

Jun-Jang Jin,Il-Gyu Ko,Sung-Eun Kim,Lakkyong Hwang,Man-Gyoon Lee,Dae-Young Kim,Sun-Young Jung 한국운동재활학회 2017 JER Vol.13 No.4

다이빙선수의 연습과 경기시 상해에 관한 비교 분석

장영대 창원대학교 체육과학연구소 1999 경남 체육연구 Vol.4 No.2

다이빙경기는 다른 운동종목과 달리 공중에서 회전을 하여 입수를 하여야 하며, 민첩한 동작이 요구되는 특징을 가지고 있기 때문에 어느 종목보다도 신체 각 부위에 많은 부상이 발생된다. 이에 본 연구는 다이빙선수들의 고난도의 기술을 위한 상해를 미연에 에 방지할 수 있는 기초 자료가 되게 하는데 목적을 두었으며, 다이빙선수들의 각종 상해를 비교·분석한 결과 다음과 같은 결론을 얻었다. 1. 상해 상황은 연습시와 경기시에 근육통 44회(33.3%)와 42회(38.2%)로 가장 높은 것으로 나타났고, 부위별에서는 연습시 허리 32회(24.4%)로 가장 높은 반면, 경기시에는 손목 24회(21.8%)로 가장 높게 나타났다. 2. 상해 발생 원인은 연습시 기술의 미숙이 49회(20.2%)로 가장 높게 나타났고 경기시에도 기술의 미숙이 28회(11.6%)로 가장 높게 나타났다. 3. 상해 시간으로는 연습시 오후시간에 발생한 상해 횟수는 67회(27.7%)로 상해율이 가장 높게 나타났고 경기시에는 오전시간에 64회(26.4%)로 가장 높게 나타났다. 4. 상해 계절별로는 연습시에는 가을에 44회(18.2%)로 상해율이 가장 높게 나타났고 경기시에도 가을에 40회(16.5%)로 높게 나타났다. 5. 상해치료 방법으로는 한의원 치료(76회(31.4%)와 물리치료 65회(26.9%)로 매우 높은 치료를 받은 것으로 나타났다.

밀도 기반의 k-최근접 질의 처리

장인성,한은영,조대수 한국지리정보학회 2003 한국지리정보학회지 Vol.6 No.4

공간 데이터베이스 관리시스템에서 제공하는 공간 질의는 많은 디스크 참조와 CPU 처리시간을 필요로 한다. 이 중에서 k-최근접 질의는 많은 디스크 참조를 요구하는 질의로써 지금까지 많은 연구가 이루어져 왔다. 트리 구조의 색인을 사용하는 k-최근접 질의 처리방법은 조건을 만족하지 않는 노드를 가지치기 기법을 사용하여 노드 방문횟수를 줄인다. 그러나 이 방법은 가지치기 과정에서 불필요한 디스크 참고가 발생하여 성능을 저하시키는 단점을 가지고 있다. 본 논문에서는 가지치기 기법 대신 주어진 k개의 최근접 객체가 존재할 영역을 미리 예측함으로써 디스크 참조횟수를 줄이는 방법을 제시한다. 이 영역을 예측하기 위해서 본 연구에서는 데이터 분포에 대한 밀도를 이용하였다. 실험에 의하면 이러한 방법은 기존의 가지치기 기법을 이용한 방법에 비해서 최고 22%, 평균 7% 정도의 디스크 참조횟수의 감소 효과가 있음을 알 수 있다. Spatial database system provides many query types and most of them are required frequent disk I/O and much CPU time. κ-NN search is to find κ-th closest object from the query point and up to now, several κ-NN search methods have been proposed. Among these, MINMAN distance method has an aim not to access unnecessary node by adapting pruning technique. But this method accesses more disks than necessary while pruning unnecessary nodes. In this paper, we propose new κ-NN search algorithm based on density of object. With this method, we predict the radius to be expected to contain κ-NN objects using density of data set and search those objects within this radius and then adjust radius if failed. Experimental results show that this method outperforms the previous MINMAX distance method. This algorithm visit less disks than MINMAN method by the factor of maximum 22% average 7%.

공분산구조분석법을 활용한 통행수단, 활동 및 통행행태에 대한 인과성 평가

장태연,김대영,김정호,권진영 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-

Activities done by individual are usually classified into obligatory and discretionary ones. Simple or complex trip pattern is performed as these activities are linked and various travel modes are used. Individuals try to link several trips as a type of chain to save transportation resources such as travel distance or time, which consequently produces complex trip pattern. These changes in urban transportation environment and less studies on activity-based characteristics make difficult to forecast trips resulting from trip linkage behavior. The purpose of study is to analyze possible causal relationships among activities, travel mode choices and travel patterns, assuming that they are directly influenced by individual or household attributes. Two kinds of models are established to achieve this purpose. One is the allocation model for mode choice for activities by three stage least square estimation method under the restricted conditions. The other is covariance structure model(LISREL) to analyze direct and indirect effect among attributes. As a result, the allocation of travel modes is mainly influenced by variables such as gender, education level, marriage, and children under 13 years old. In LISREL, it is shown that those variables well explain an exogenous personal attributes and only family income do an exogenous household attributes. While trip pattern attributes is well reflected by travel mode attributes, it is less reflected by activity attributes.

림프절 질환들에서 병변에 따른 수지상 세포의 변화

장영우,김대중,양승하,김의한 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1

The reaction patterns of the dendritic cells in lymph node lesions was as follows; 1. The number of the dendritic cells in the nonspecific lymphadenitis showed no significant decrease, so the immunologic reaction in the lymph nodes substained. 2. The number of the dendritic cells in tuberculous lymphadenitis showed significant decrease in case of the tubercles present in the lymph node than in case of no tubercle present. 3. The dendritic cells in lymph nodes of gastric adenocarcinoma were entirely disappeared regardless of metastasis. 4. The dendritic cells in lymph node of infiltrating ductal carcinoma were observed significantly regardless of metastasis. Above results suggested that the no expression of dentritic cells appeared to be the result of loss of function than disappearance. The loss of function of dendritic cells meaned that the easy infiltration of agents due to lack of immune reaction Because the immune reaction of lymph node in infiltrating ductal carcinoma was sustained while the immune reaction of lymph node in gastric adenocarcinoma was significantly reduced, the prognosis of infiltrating ductal carcinoma was better than gastric adenocarcinoma. But more research is necessary about the other prognostic factors.

간접접착술식에서 접착제의 종류에 따른 전단결합강도와 파절 양상

장문주,이대희,김현덕,전영미,김정기 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4

The purpose of this study was to compare the shear bond strength and failure type of various adhesives in indirect bonding technique. Five types of orthodontic bonding adhesives - ES(Excel sealant), EP(Excel paste), EA(sealant and past), T(Transbond XT sealant), L(Light bond sealant) - were used in this study. Metal bars(70×7×7㎜) were milled and sand-blasted with 50㎛ alumina and then coated with resin. resin blocks(3×4×5㎜) were made and bonded to the resin-coated metal bars with various adhesives. Shear bond strengths were measured by an universal testing machine. The film thickness, interface region. Self-curing resin, EX(Excel sealant) showed the greatest shear bond strength(22.82±3.05 ㎫) and self-curing resin, EP(Excel paste) showed the lowest shear bond strength(13.91±2.70 ㎫). The shear bond strength of self-curing resin, EA(sealant and past : 20.94±0.92 ㎫) was similar to those of light-curing resins, T(Transbond XT sealant : 20.90±2.34 ㎫), L(Light bond sealant : 18.12±1.63 ㎫) group. Most of the failure occurred between the resin coated metal bars and sealant regardless of the adhesives.

直接螢光抗體法에 依한 고양이의 Toxoplasma 感染 樣相에 關한 調査 硏究

張南植,羅榮彦,李英河,辛大煥 충남대학교 의과대학 지역사회의학연구소 1989 충남의대잡지 Vol.16 No.1

A study on the direct fluorescent antibody test using the several organ tissues and stamp smear of domestic cats which are the final and favorate host of Toxoplasma gondii, was performed. The organ tissue used was prepared in 6-8μm thickness by frozen section at -20℃ and stamp smear sample was prepared by smear wet mounting. Fluorescein isothiocyanate(FITC) conjugates was diluted by 4 fold, 1:4, 1:16, 1:256 in phosphate buffer saline (PBS, pH 7.2). A total of 35 domestic cats which is being commerced in Jungang domestic animal market, Taejeon, was examined. The results obtained were summarized as follows; 1. Fluorescent zone of Toxoplasma was mainly part of below microtubuel and cell membrane. 2. Fluorescent reaction was no-fluorescent and non-specific reaction in under the titer 1:4, and in over the titer it was reacted in 16 samples of the tissue organ, 4 sample s of smear. 3. Positive rate of tissue specimen was 8.6% in liver, 5.8% in spleen, lung heart respectively, 2.9% in lymph node. 4. Positive rate of stamp smear specimen was 2.9% in liver, spleen lung, respectively. 5. Among 35 domestic cats, infected domestic cats were indentified to 5 domestic cats, corresponding to 14.3%.

상추(Lactuca sativa L.)의 ACAT 억제 Diterpenoid, Phytol : 식용 식물자원으로부터 활성물질의 탐색 Development of Biologically Active Compound from Edible Plant Sources

장태오,방면호,송명종,홍윤희,김지영,정대균,배동근,권병목,김영국,이현선,김인호,백남인 한국농화학회 2003 Applied Biological Chemistry (Appl Biol Chem) Vol.46 No.1

예망 어구의 자원관리형 끝자루 구조에 관한 연구

장덕종,김용주,김대안 여수대학교 1999 論文集 Vol.14 No.2

지금의 예망어구 끝자루 설계 형태와는 달리, 어획 선택성의 폭을 좁히고 소형 어류의 탈출이 용이하도록 고안된 예망어구의 끝자루를 설계하여 기존의 끝자루 형상과 어획비교 실험을 통해 나타난 어획차와 탈출률, 체장차 등을 검토, 고찰한 결과를 요약하면 다음과 같다. 1. 끝자루 형태에 따른 전체적인 어획량은 큰 차이가 없었지만, 끝자루 내망의 어획량은 일반형이 252kg으로 사각주형이 224kg보다 많았고,Cover-net에서는 사각주형이 (약 90kg). 일반형(약 53kg)보다 높아 탈출량이 많았다. 2. 일반형 끝자루 내망의 평균 어획비는 80.1%이고 Cover-net가 19.9%인 반면, 사각주형에서 는 66.8%와 33.2%로 나타났다. 3. 어류의 평균 체장은 일반형 끝자루 내망에서 15.5㎝,Cover-net에서 9.6㎝였고, 사각주형은 16㎝, 10.6㎝로 사각주형 끝자루에서 탈출한 어류의 체장이 컸다. 4. 일반형 끝자루에서 탈출률은 끝자루의 전반부보다는 후반부로 갈수록 높아져 뒷부분이 46.8%로 가장 높았고, 사각주형에서는 끝자루 맨끝인 뒷판에서 집중적으로 탈출이 이루어져 54.8%를 기록했다. For the purpose of the investfication on the trawling fishing gear cod-end for the fisheries management, fishing experiments carried out in southern sea of Korea by used model with general type and designed in this study box type cod-end. The experiments were compared on the catch and body length, escape rate of fishes. The results obtained are summarized as follows: 1. The weight of catch in the inside cod-end was higher in the general type with 2525kg than on the box type 224kg, but the cover net was higher in the box type with 90kg than 53kg of the general type. 2. The average catch rate were 80.1% in the inside cod-end/. 19.9% in the cover-net with the general type and 66.8%, 33.2% at the box type cod-end 3. The average body length of with in the limits of the possible compared on fishes were 15.5cm in the inside cod-end, 9.6cm in the cover-net with the general type and 16cm, 10.6cm at the box type cod-end. 4. The escape rate was higher in the afterward than at the forward pannel on the all the type and showed highest in the backward pannel with the box type cod-end.

지능형교통시스템 구축을 위한 차세대도로체계의 개발방향

張德亨,沈大榮 관동대학교 1997 關大論文集 Vol.25 No.2

The rapid motorization during the recent years has caused more traffic problems such as congestion and accidents. Expanding the transportation facilities cannot be the ultimate solution because fo the shortage of the necessary national finances and the environmenal impacts. As one of alternatives, Automated Highway Systems (AHS) which is the sub-system of Intelligent Transport Systems(ITS) is being considered to have the potential for offering larger capacity and safety gains without requiring significant amounts of additional right-of-way. This paper focuses on the policy issues and strategies for the implementation of AHS in Korea. This paper also defines the functional requirements of the AHS classifying it by highway, vehicle and control elements. These requirements are prepared considering the changes of the national highway network system in the future. Meanwhile, this paper is to be designed for the necessary physical design elements to meet the standard requirements including typical highway cross sections, and access and egress facitities, etc. This paper suggests the phase plan reflecting the development of technical status. And, this paper assesses initial evaluation about AHS feasibility through the effectiveness, the obstacles and counterplans, and the benefit-cost analysis.