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강석원,정길생 ( Seok Won Kang,Kil Saeng Chung ) 한국축산학회 1976 한국축산학회지 Vol.18 No.2
This experiment was carried out to clarify the seasonal changes in general characteristics such as semen volume, sperm concentration, sperm motility, sperm abnormality and pH of the semen collected from Korean native goats by the method of electrostimulation. The results obtained in this experiment were as follows: 1. Semen volume per ejaculation was increased with decreasing daylight and the reverse was true fur the incensing daylight; average semen volume per ejaculation of November, December and January was 0.95㎖ and that of July, August and September was 0.50㎖. Significant difference (P$lt;0.05) between those two volumes was observed: 2. Seasonal changes in sperm concentration was reciprocal to those of semen volume. Average sperm concentration of July, August and September was 16.02×10^8/㎖, and that of November, December and January was 9.86×10^8/㎖ and there was also significant difference (P$lt;0.05) between those two concentration. 3. Sperm motility was changed in parallel with the variation of semen volume per ejaculation; average sperm motility of November, December and January was 83.30 and that of July, August and September was 55.10 as motility index, and significant difference (P$gt;0.05) between those two values was observed. 4. Sperm abnormality was also changed in parallel with semen volume; average percentages of abnormal spermatozoa during November, December and January were higher than those of the other months. 5. The pH of ejaculated semen was ranged from 6.80 to 7.20 throught the year and no remarkable variation acording to season was observed. 6. Significantly high (P$lt;0.01) negative correlations between semen volume and sperm concentration, sperm concentration and sperm motility, sperm concentration and sperm abnormality was observed. And there was also positive correlation between semen volume and sperm motility, semen volume and sperm abnormality, semen volume and pH, and sperm motility and pH. 7. It was clarified by those results that the reproductive activity of Korean native goat was activated by the increasing daylight began from November to January in Korea.
PRT 차량용 수직이송장치의 개발을 위한 구조강도 평가
강석원,엄주환,정락교,송준현,Kang, Seok-Won,Um, Ju-Hwan,Jeong, Rag-Gyo,Song, Joon-Hyun 대한기계학회 2015 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.3 No.3
본 논문에서는 PRT(Personal Rapid Transit) 차량의 수직이송을 위한 장치를 개발하는 과정에서 수행된 주요 구조물의 정적 구조적 안전성 평가 결과를 다룬다. 지금까지 노선상에서 승객이 탑승한 상태에서 운영중인 차량의 수직이송에 대한 연구는 전무하며, 이는 기존의 2 차원 적인 교통운영 체계의 한계를 극복하는데 기여할 수 있을 것으로 기대된다. 특히, 본 연구에서 제안된 수직이송장치는 순환컨베이어 방식으로 연속 이송이 가능해서 통행량이 많은 지역에도 적용이 가능하다. 본 시스템이 물류분야에서 많이 사용되어 왔지만, 수직이동 시 차량의 무게에 의한 하중은 일반적인 물류의 수송과는 다르게 집중하중 형태로 컨베이어에 가해지기 때문에 이에 대한 구조적 안정성 평가는 필수적이다. 본 논문에서는 상용 유한요소 해석 프로그램인 $Ansys^{(R)}$를 이용해서 수직이송 장치의 기본 설계(안)의 구조적 안정성을 수치해석적 방법에 의해 평가하고자 한다. This paper presents numerical results of static structural stability analysis in development of a vertical transfer device of a PRT(Personal Rapid Transit) vehicle. The vertical transfer of a fully occupied vehicle operating on a road network is the first attempt, which is expected to contribute to overcome the limitations of conventional 2-dimensional operation mode. In particular, the vertical transfer apparatus designed based on vertical circulating conveyors is capable of continuous transfer without time delay so that it enables to accommodate a high traffic density. This system has been frequently used in a logistics field; however, it is essential to assess a structural integrity because an external force by a vehicle weight is exerted on the conveyors in the form of a concentrated load unlike a conventional logistic transport. In this study, prior to the production process, the structural performance of the pilot design in an early stage is numerically evaluated using the commercial finite element method (FEM) solver (i.e., $Ansys^{(R)}$).
섬모체 신경조직과 동시 배양된 단순포진바이러스의 축삭이동
강석원,고명규,Suk-Won Kang,Myung-Kyoo Ko 대한안과학회 2005 대한안과학회지 Vol.46 No.9
Purpose: To investigate the replication of HSV within cultured cell and axonal transport of HSV within the axon of the ciliary nerve following the injection of HSV into a cultured ciliary nerve. Methods: The explant of the ciliary nerve was cultured with a medium containing nerve growth factor for 30 days when the suspension of HSV-1 (Kos strain) was introduced into the culture dish to co-culture with the ciliary nerve. The ciliary nerve was examined with transmission electron microscopy 30 days after culture and 6 days after co-culture with HSV. Results: The ultrastructure of the explant of the ciliary nerve co-cultured with HSV showed that the viral capsid acquired a viral envelope and viral core, and a capsid and inclusion body within the nucleus. The enveloped virus was scattered within the vesicles of the cytoplasm. The virus-like particles were identified at the axonal fibers. Conclusions: The co-culture of the explant of the ciliary nerve and HSV showed the replicative process of the HSV within the cultured cell. The virus-like particles within the axon showed the evidence axonal transport of the virus under culture conditions.
국내 고층 주상복합 건물의 구조적 특성에 관한 조사 연구
강석원,이성호,Kang Suk-Won,Lee Sung-Ho 한국건설관리학회 2003 건설관리 : 한국건설관리학회 학회지 Vol.4 No.4
Recently, the interest in a complex building increases rapidly in Korea. High-rise complex is not simply the combination of a residential apartment and a business office as previous but a building with the object of the convenience of the residents familiar with city-life style through adapting the high class life style and new residential culture to the business space, and the efficiency in using the limited building site in the town. This study presents an exploratory analysis focusing the structural system with the help of the extensive survey of the construction site in Korea, and aims a guideline for the structural design and construction of high rise complex. Through the survey, change and development in the design and the construction can be seen as the height and size of the complex grow. It is almost indispensable to design a structural system against lateral forces like earthquake or wind, which is usually measured by story drift ratio or story displacement. Improvement of the structural materials and their usages is also included for the efficiency of the structural system. Useful slab-beam system contributing to the decrease of the story height is still a concern.
강석원(Kang Suk-Won),홍성걸(Hong Sung-Gul) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.1
An analytical method is proposed for the analysis of the reinforced concrete flexural members subjected to high temperatures. The analysis procedure for the structural response due to the temperature, in this study, is subdivided into two independent steps: sectional analysis and member solution. In the sectional analysis, the effects of the temperature change and the nonlinear temperature distribution at the section are considered. A segmentation scheme is employed in the sectional analysis. It implicates uniform sectional properties and temperature distribution through the longitudinal axis of the member. The structural capacity at the section is calculated in this step. On the other hand, the effects of the temperature change are considered in the member solution. The changes of mechanical properties calculated at the segmented section are integrated into the member behavior at the member solution step.<br/> An application of this method is performed and compared with the fire test result for simple supported beam which is subjected to ASTM E119 test fire. The comparison indicated that the proposed segmentation method for the thermal response analysis presents fairly a good agreement with the experiment.