운하-연안 연계용 바아지의 구조 설계 및 해석

김경수(Kyung-Su Kim),손충렬(Choong-Yul Son),김성준(Sung-Joon Kim) 한국해양공학회 1999 韓國海洋工學會誌 Vol.13 No.2

Two types of barge, container and tanker vessels, are designed with specific dimensions for canal-coastal shipping in Kyung-In canal and Yellow Sea region. The principal dimensions of barges are determined by considering the environment of Kyung-In canal and Yellow Sea. The selection of structure type and strength confirmation is conducted by the technical rules of Korean Register of Shipping.<br/> For the structural analysis of designed barges, the semi-direct structural analysis is carried out with using MSC NASTRAN software. Applying identical dimensions to both vessels, the standardization of structural design and analysis procedure are introduced.

측두엽 간질의 선택적인 후대뇌동맥 Sodium Amytal 검사 2예

이경열,김옥준,서범천,이병인,김원주 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

날개끝 형상변화에 의한 유도항력 감소장치에 관한 연구

이봉준,이경준 한국항공대학 항공문제연구소 1992 航空問題硏究所 硏究誌 Vol.2 No.-

비행중에 항공기의 연료를 절약시키는 가장 중요한 요소는 항공기의 항력을 감소시키는 것으로서 본 연구에서는 연료 절약형 이음속 항공기의 개발을 위한 유도항력감소에 관한 기초적인 연구를 수행하였다. 날개의 형상에 따라 유도항력이 달라지므로 이 항력을 최소로 하는 날개끝의 형상에 대한 연구와 날개끝 와류를 제어하는 유도항력 감소장치에 대하여 이론해석 및 풍동실험을 통한 연구를 하였다. 날개끝의 형상으로는 날개 끝에 camber와 파형이 있는 새로운 crescent형 날개끝 모양에 대한 공력특성을 구하였다. 날개 끝에 장착하는 유도항력 감소장치로서 날개끝 strake, 방사형 다중슬롯에 대한 기술을 개발하였다. 여러 가지 모양의 날개끝 strake를 설계하여 직사각형 날개, 테이퍼형 날개 및 뒤젖힘 날개에 장착하여 수치해석 및 풍동실험을 통한 공력특성을 조사하였다. 날개 끝에 방사형으로 설치한 다중슬롯장치가 날개끝 와류를 제어하여 날개의 양항계수에 미치는 효과를 실험적인 방법으로 연구하였다. The most important factor in saving fuel during flight is the reduction of aerodynamic drag of the aircraft. In this study, a basic research has been carried out to reduce the induced drag for the development of fuel economical subsonic aircraft. The wing tip configuration and devices to reduce induced drag were investigated by numerical analysis and experiment. To study the aerodynamic characteristics of a wing tip shape, wind tunnel testing and numerical analysis were carried out for a newly developed crescent wing tip with camber and wavy tip shape. For the wing tip drag reduction devices such as wing tip strakes, and radial multiple slots were developed. Various shapes of wing tip strakes were designed and wind tunnel tests were conducted to investigate the aerodynamic characteristics of wing tip strakes for a rectangular wing, tapered and 35 degree swept back wing. An experimental study was performed for effect of the multiple slots which were formed at the wing tip radially on the coefficient of lift and drag of a wing by reducing the trailing vortex effect.

P.E.G處理가 고추 種子發芽에 미치는 影響

金炅濟,金益焌 東國大學校 1988 論文集 Vol.27 No.-

Experiment were conducted to find out the of osmotic pretreatment on the germinability of pepper seed at 10, 15, 20, 2 and 30℃ 1. Osmotic potential of-10 BAR was most effective ofr germinability among three levels tested potentials and 3 days were more effective than I day in treatment peridods. 2. germination percentage and rate of presoaking seeds were decreased when seeding at 28 and 35℃. 3. seeds of both cultivars were invigorated by presoaking in a-10 BAR solution of polyethylene glycol-6000(273g/liter H₂O) at 15℃. 4. The effect of osmotic pretreatment on pepper seeds was different between two varieties.

저선량 방사선이 MC3T3-E1 골모세포주의 석회화결절 형성에 미치는 영향

김경아,고광준 대한구강악안면방사선학회 2004 Imaging Science in Dentistry Vol.34 No.3

Purpose : To investigate the effects of low dose irradiation on the calcium content and calcific nodule formation of the MC3T3-E1 osteoblastic cell line. Materials and Methods : Cells were irradiated with a single dose of 0.2, 0.4 and 0.6 Gy at a dose rate of 5.38 Gy/min using Cs-137 irradiator. After irradiation, the calcium content and calcific nodule formation were examined on the 1st, 2nd, 3rd and 4th week. Results : We did not find any significant difference of total calcium content after irradiation of 0.2, 0.4 and 0.6 Gy when compared with the unirradiated control group. There was no significant difference of total calcium content between 0.2, 0.4 and 0.6 Gy irradiated groups. We found an increased tendency of the calcific nodule formation after irradiation of 0.2, 0.4 and 0.6 Gy when compared with the unirradiated control group without significant difference of calcific nodule formation between 0.2, 0.4 and 0.6 Gy irradiated groups. Conclusion : The results showed an increased tendency of the calcific nodule formation after low dose irradiation. However, this tendency did not increase with the increase of irradiation dose.

프린트 기법을 이용한 문화상품 개발 및 연구

정경연,박성준 홍익대학교 산업디자인 연구소 2003 미술디자인 논문집 Vol.- No.8

So far, numerous attempts have been made to commercialize Korea's representative cultures in terms of contemporaneity, but only few of them have been upheld and developed with continuity. The purpose of this study is focused on making neckties, scarves, and purses with applications of weaving machine, our world-famous cultural inheritance, and developing them as general tourist goods. Now, there are many local communities who plan and hold cultural events and festivals featuring their native traditions. In addition, the development of a variety of cultural items is attempted in many-sided ways. Especially, cultural goods made using textile materials can provide more business opportunities for development and marketing, because they are more readily accessible to consumers in actual life. The recent development of digital technology has made it possible to produce various goods in small quantity by realizing the regular use of the digital textile print (DTP) system that allows fabrics to be printed on the spot. Such technological development provides great advantages of shortening the sampling and main processes, identifying consumers' preferences readily, and ultimately controlling the production volume. Therefore, these advantages can lead to higher strength in producing cultural goods that have been under a poor or no distribution system. Likewise, this study produced a small quantity of prototypes using the digital print in a way to examine consumers' preferences, which were difficult to predict through paper design or on the computer screen. As a result, the process of mass production could be handled more carefully after the processes of correcting and making up for the discovered facts. For some items, the weaving technique had to be applied due to those product features and design differences that could not be expressed by the print technique. However, the weaving method has a disadvantage of increasing the unit cost of production, because, although it may give a high-class image to products, it takes a long time to produce prototypes and work on corrections and it is impossible to produce in small quantities. In Korea, local communities (governments) offer various cultural events and functions in a way to promote national competitiveness, also expecting their incidental synergy effects. Those cultural events will serve to attract more tourists, and the development of cultural tourist goods will not only increase the income from tourism, but lead to the qualitative enhancement of cultural events. In conclusion, we will have to continue to concentrate on developing more advanced cultural goods as well as traditional cultural handicrafts.

스마트 안테나에서 블라인드 기법을 이용한 Two Dimensional RAKE 수신기

박형준,이철형,최명수,김경호,이성로 木浦大學校 應用科學硏究院 2001 應用科學硏究誌 Vol.1 No.-

Smart antennas technique is the scheme that focuses the signal on the desired user using array antennas. Therefore, the scheme can dramatically improve performances in conventional mobile communication systems. The scheme is the newest technique for beamforming. Its specific function combines antenna arrays with digital signal processing techniques that can control signal direction. Now, the scheme is known as the future generation core technique in communication provider communities. In this paper, we propose two dimensional rake receiver based on blind schemes in smart antennas and then compare the performance of the proposed scheme with that of the conventional scheme. Computer simulation results show that the proposed scheme outperforms the conventional scheme.

크리깅 모형을 이용한 컴퓨터 실험의 설계와 분석

차경준,류제선,최항석 漢陽大學校 自然科學硏究所 2001 自然科學論文集 Vol.21 No.-

최근 많은 과학적 현상에서 서로 다른 위치에 있는 자료들이 공간적인 상호 작용에 의해 영향을 받는 복잡한 컴퓨터 모델링이 연구되고 있다. 그러한 연구들은 주로 공간적 변인에 의해 영향을 받는 자료에 대하여 상호 연관성을 고려한 함수식에 대한 예측모형에 초점을 두고 있다. 본 연구에서는 컴퓨터 실험에서의 메타모델로서 크리깅 방법을 제시하고, 컴퓨터 모델링을 통하여 생성된 자료를 가지고 크리깅 방법의 정확성과 효율성을 검증하였다. In many fields of design of experiments, the complicate computer modeling, which is influenced by inter-action of various data, has been studied. These studies are focused on prediction models for the functions considering the inter-correlated points influenced by spatial variation. In this paper, we describe the definition, the prediction function and the algorithm of kriging method and examine the accuracy of kriging by using validation method.

복압성요실금(Stress urinary incontinence)과 절박성요실금(Urge incontinence)환자에서 TVT 수술 결과의 비교

이경구,이준호,권용욱,정태융,심희영,이상익 관동대학교 의과대학 의과학연구소 2005 關東醫大學術誌 Vol.9 No.1

Tension-free vaginal tape(TVT) has been widely used in the management of stress urinary incontinence(SUI), and has been applied to urge incontinence (UI). We evaluated and compared the outcomes between SUI and UI for patients who had undergone TVT. Patients were categorized into SUI(33 patients) and UI(26 patients). Before treatment, we asked about LUTSs using female bladder questionnaire. And we asked about sexual function. After treatment, the same questionnaires were repeated. During the postperative period, the objective and subjective success rate were evaluated. For operation outcome results, in SUI group there were 29 cases of cure (87.9%)and 2 of improvement(6.1%), and in UI group there were 20 cases of cure(76.9%)and 3 of improvement(11.5%) (p>0.05). The operation satisfaction rate of patients was 90.9% in SUI group and 84.6% in UI group(p>0.05). Improvement of sexual satisfaction occurred in 6(20.0%) of SUI group, and 3 (18.8%) of UI group, respectively(p>0.05). The objective success rate, satisfaction rate and sexual satisfaction of SUI patients did not significantly differ from the women with UI. Also, these results shows that TVT procedure improves some LUTSs in both groups. We consider the TVT procedure to be an effective treatment not for stress urinary incontinence but also urge incontinenece.

參透壓處理가 시금치 種子發芽에 미치는 影響

金炅濟,金益焌 동국대학교 1985 論文集 Vol.24 No.-

Exprement were conducted to find out the effect of osmotic pretreatment on the germinability of spninach seed in high temperature. The results are summarized as follows. 1. All of the osmotic pretreatment were more effective on germinability than control. 2. Treatment temperature of 10℃ was most effective fr germinability among three levels tested temperatures. And showed widest variation in the effect of treatment periods. 3. Osmotic potential of-15BAR was most effective for germinability among three levels tested potentials. And also showed widest variation in effect of treatment periods. 4. The germination speed of all pretreatments were far faster than that of control. 5. The-15BAR treatment of 10℃ for 7 to 9 days was regared to be most effective in promoting the germinability of spinach seed among all pretreatment. However treatment for more than 9 days showed poor germinability.