제트베인형 추력편향장치의 공기역학적 특성

박종호,이성노,이은모,신완순,이택상,길경섭 충남대학교 공업교육연구소 2000 論文集 Vol.23 No.1

The aerodynamic study of jetvane type TVC(Thrust Vector Control) were conducted using supersonic cold-flow system. The use of TVC Systems in particular jet vanes, are currently being researched for use in air launch, ship launch, underwater launch and high altitude maneuvering of tactical missiles and rockets. The necessity to generate control forces to rapidly change the course of the missile is frequently required when traditional, exterior aerodynamic surfaces are unable to produce these forces, when the flow over the control surface is insufficient. This situation can occur at launch, or high angles of attack of the control surfaces. Jetvanes performed well at all altitudes and environmental conditions, and jet vanes are extremely effective at deflection angles up to as high as 30 degrees, make them ideal for the launch and maneuver applications. In this study, aerodynamic performance test of jetvane type TVC was conducted, and The effect of shape and deflection angle of various types of jetvanes are investigated

나팔백합(Lilium Longiflorum)의 인편과 화기배양에 미치는 Thidiazuron의 효과

朴鶴封,崔銀京 全北大學校 1994 論文集 Vol.38 No.-

These studies were performed to extablish the method of in vitro micro propagation through the bulb scale and floral organ of Lilium longiflorum. Bulb scale of 'Le Reve' and 'Casa Blanca' were cultured on MS basal medium supplemented with NAA, BA and TDZ(thidiazuron). The greenish compact callus were observed on most of medium after 6 weeks of culture. Multiple shoots were vigorously developed from bulb scale of 'Le Reve' and 'Casa Blanca' on the medium with 0.1 - 2.0㎎/L NAA plus 0.1 - 4.0㎎/L TDZ. These shoots were normally grown into plantlet after subcultured on MS basal medium without any growth regulators. When style, filament and ovary of Lilium longiflorum cv. 'Le Reve' 'Casa Blanca' 'Star Gazer' were cultured on the medium containing NAA, BA, TDZ, we observed the higher number of shoot on the medium with 0.1 - 4.0㎎/L TDZ than BA. But the significent response difference between varieties was recognized in floral organ culture. Considering above mentioned results, bulb scale tissues were more efficient than other floral organ tissues as cultural materials.

Kalanchoe daigremontiana Hamet et Perr의 칼루스 誘起 및 植物體 再分化

朴鶴封,崔銀京 全北大學校 1993 論文集 Vol.35 No.-

Adventitious bud of Kalanchoe daigremontiana Hamet et Perr. excised from the mature leaf were cultured on MS basal medium supplemented with 2,4-D, BA, separately and in combinations. Stem elongation and root differentiation were occurred on medium containing 0.01-0.5㎎/ℓ 2,4-D or 1.0㎎/ℓ BA after 4 week culture but the medium containing 0.1 ㎎/ℓ 2, 4-D have been shown to inhibit root differentiation. The friable calluses with granular structures were remarkably produced on medium supplemented with 0.5-2.0㎎/ℓ 2, 4-D and 0.5㎎/ℓ 2, 4-D plus 0.02㎎/ℓ BA. Morphologically these calluses were similar to embryogenic callus. To examine the effect of growth regulators between the initial culture and the subculture, young leaf of regenerated plant in the initial culture' were cultured to medium containing various concentrations of 2,4-D and BA in the subculture. Plant was regenerated from leaf callus in the 3.0㎎/ℓ 2, 4 -D plus 0.5㎎/ℓ BA treatment and multiple adventitious bud were directly produced from explant.

Negative Energy State in 4+D dimensional toroidally compactified (K?=0)K-K Theory

박은경,권병성 慶星大學校 1996 論文集 Vol.17 No.4

It is shown that the 4+D dimensional K-K theory with toroidally compact (K?=0) internal space admit negative energy state, which implies that the M⁴×T? K-K vacuum is semiclassically unstable.

참취(Aster scaber Thunberg) 정단배양에서 대량증식에 미치는 Thidiazuron의 효과

朴鶴封,崔銀京 全北大學校 1994 論文集 Vol.38 No.-

Shoot tips of Aster scaber Thunberg were cultured on Murashige and Skoog's(1962) medium containing various concentrations of growth regulators. Friable callus were effectively initiated on 0.5 ㎎/L 2,4 - D and 0.1 mg/L TDZ(thidiazuron) or BA than 0.5 - 2.0 ㎎/L 2,4 - D only. TDZ stimulated shoot proliferation in shoot tip explants of A. scaber. Shoot numbers treated with TDZ were greater than the number produced on the medium with 0.1 ㎎/L BA, but root formation and shoot elongation were inhibited by TDZ during the culture period. Multiple shoots were differentiated from the callus on medium supplemented with 0.1 ㎎/L TDZ. Multiple shoots were formed from greenish compact callus, these shoots had narrow and distorted leaves, secondary shoots directly developed from leaves of regenerated shoots, rosette type shoots had short internode. To establish in vitro propagation system of Aster, shoots constantly maintained when these shoots were transferred to 0.2 ㎎/L NAA plus 0.5 ㎎/L TDZ, and normal plants were obtained on the MS basal medium after 2 to 3 subcultures.

대전지역 대학생의 학교 식당 이용실태 및 만족도 조사

왕수경,임영희,윤은영,구난숙,박선미 대전대학교 생활과학연구소 2000 생활과학연구 Vol.6 No.-

The aspects and satisfaction on university foodservice were investigated to provide basic information for better foodservice in university by questionnaires. The survey was conducted in Daejon, and data were analyzed by SAS. Although 87.3% of subjects were under foodservice, only 2.0% of them preferred the foods served in university. The most favorite reason for foodservice was indicated as no need on lunch bag(31.1%) and frendship of classmates(25.5%). The most unfavorite reason for foodservice was indicated as bad taste of foods(68.7%) or many dislike foods(13.2%), also dirty eating place(7.7%). The subject liked ssalbap, baechu kimchi, beef foods. The acceptance about kongbap, yulmu kirnchi, beef products was higher in men than women(p<0.05). The preference of mieokkuk was higher in women and that of beef soup was higher in men(p<0.05). The degree of satisfaction was lower in men than in women about the amount of foods(p<0.001). Also the degree of satisfaction was lower in women than in men about sanitary condition of eating place. 54.6% of them had taken the unwanted materials in foods and 3% of them experienced the deteriorated food. The results suggest that food preference of subjects should be considered in meal planning and various cooking method should be utilized to enhance taste of foods for better foodservice. Also, the importance of various foods intake must be periodically and continuously taught to them through nutrition education.

시멘틱 웹 환경에서의 온톨로지 기반의 정보검색

정은경,김영민,변영철,이상준,박경린 濟州大學校 基礎科學硏究所 2003 基礎科學硏究 Vol.16 No.2

온톨로지는 시멘틱 웹을 구현하기 위한 이론이다. 온톨로지는 웹자원의 효과적인 검색, 통합, 재사용을 위한 새로운 기술이고 사람과 이질의 응용 시스템 간에 지식을 공유하고 재사용하기 위한 방법을 제공한다. 온톨로지의 역할은 특별한 개념을 명세화하는 것이다. 도메인과 일반적인 온톨로지는 정보와 지식 시스템을 분석하고 디자인하는 측면에서 공유, 통합, 재사용될 수 있다. 본 연구는 제주도의 숙박과 관광정보를 위한 온톨로지를 디자인하는데 목적이 있다. 그리고 제안된 온톨로지 기반으로 인터넷 웹 검색 시스템을 만드는데 목적이 있다. 본 연구에 의해 클라이언트가 사용하는 표현은 다르지만 뜻이 같은 동의어에 의해 같은 결과를 얻을 수 있다는 것을 알게 되었다. Ontologies are formal theories that are suitable for implementing the semantic web. Which is a new technology that attempts to achieve effective retrieval, integration, and reuse of web resources. Ontologies provide a way of sharing and reusing the knowledge among the people and the heterogeneous application systems. The role of ontologies is that of making explicit specified conceptualizations. In this context, domain and generic ontologies can be shared, reused, and integrated in the analysis and design stage of information and knowledge systems. This study aims to design an ontology for juju lodges and tour, and build an Internet web retrieval system based on the proposed ontologies. This study found that we can take the same result for synonym that cilent use.

就學前 兒童의 營養實態 調査 : 全南 靈光郡을 中心으로 Young Gwang Gun, Chun Nam

徐華中,朴垠暻,李明烈 조선대학교 기초과학연구소 1986 自然科學硏究 Vol.9 No.1

The following questionares were made through interview with their mothers of 400 children (226 male and 174 female) in Moo Ryong-ri and Do Dong-ri, Young Gwang Gun, Chun Nam, from July 22 to August 2 in 1985. ① The height and body weight of the male and female-children were above the standard all through the ages except for the 1 and 2 year-old male-children in body- weight. ② In early childhood nutrition 50.50% of subjects was breast feeding, 20.75% bottle-fed and combination-fed. In weaning period 40% of subjects was weaned within 6 months after birth, 46% of them was between 7-12 months and 14% of them were weaned after 13 months. ③ The composition rate of carbohydrates was lower than the other areas as that of carbohydrates, fat and protein was 55~75% : 12~27% respectively. ④ Snacks were served 2.7 times a day to them on the average, and were mainly eaten fruits, biscuits, cakes and ice creams. The children of 174 had an unbalanced diet and their liked mainly meats. ⑤ In food preference, the favorite foods were biscuits, fruits, milks and ice creams. The unfavorite foods were vegetables (such as onions), pepper foods, meats and food included lots of oil.

중증근무력증과 재생불량성빈혈을 동반한 흉선종 1례

강지은,박상곤,김경남,임현성,박준옥,홍찬표,박치영,정춘해 朝鮮大學校 附設 醫學硏究所 2002 The Medical Journal of Chosun University Vol.27 No.2

Thymoma is the most common tumor of the anterior mediastinum and often associated with autoimmune diseases including myasthenia gravis, systemic lupus erythematosus, hypogammaglobultnemia, agranulocytosis, pure red cell aplasia and aplastic anemia. Aplastic anemia is a rare complication of thymoma and is properly documented in only few cases. Here, we report the case of 61-year-old patient who was found simultaneously to have a thymoma on anterior mediastinum and pancytopenia due to aplastic anemia and have been treated for myasthenia gravis since seventeen years ago.

건강 자원자에서 pH 5를 기준으로 한 인두 산 역류검사

박은호 ( Eun Ho Park ),문원 ( Won Moon ),박무인 ( Moo In Park ),김경미 ( Gyung Mi Kim ),신은경 ( Eun Kyung Shin ),김규종 ( Kyu Jong Kim ),박선자 ( Seun Ja Park ),이강대 ( Kang Dae Lee ) 대한소화기기능성질환·운동학회 2009 Journal of Neurogastroenterology and Motility (JNM Vol.15 No.1

목적: pH 4를 기준으로 한 인두 산 역류 검사는 인후두역류 질환의 진단에 필수적이다. 하지만, 최근 들어 pH 4 이상의 약산에서도 인후두 증상과 점막의 손상을 일으킬 수 있음이 보고되고 있다. 본 연구는 pH 5를 기준으로 인두산 역류의 발생율과 발생 횟수 및 %시간을 알아보고 Ph 4를 기준으로 한 결과와의 차이를 분석하고자 하였다. 대상 및 방법: 30명의 무증상인을 대상으로 상부 식도 괄약근 1 cm 상부와 하부 식도 괄약근 5 cm 상부에 유리전극을 위치시켜 보행성 24시간 인두 pH 검사를 시행하였다. 결과: 무증상 자원자의 인후두 산 역류는 pH 4를 기준으로 46.7%에서 pH 5를 기준으로 86.6%에서 발생하였다. 식사시간을 제외한 95 및 90 백분위 기준의 정상 상한치는 산 노출 %시간은 각각 pH 4를 기준으로 0.41%와 0.18%였고 pH 5를 기준으로 3.3%와 2.1%였다. 산 역류 발생 횟수의 정상 상한치는 각각 pH 4를 기준으로 12.8회와 5.0회였고 pH 5를 기준으로 16.5회와 14.5회였다. 결론: pH 5를 기준으로 한 인두 산역류 발생은 대부분의 건강한 성인에서 발생한다. 본 연구는 한국인에서 인두의 병태생리에 있어서 약산의 인후두 역류의 원인적 역할을 평가하는데 있어서 중요한 정보를 제공할 것으로 생각된다. Background/Aims: Pharyngeal pH monitoring at pH 4 is a cardinal diagnostic method for assessing laryngopharyngeal reflux (LPR). However, it has recently been suggested that weak acidic reflux above pH 4 may have a role in the development of laryngopharyngeal symptoms and mucosal damage. The aim of this study was to quantify the pharyngeal pH 5 reflux episodes and compare them with the pH 4 reflux episodes. Methods: Thirty healthy subjects were studied using ambulatory 24-hour pharyngeal pH monitoring with glass electrodes positioned 1 cm above the upper esophageal sphincter and 5 cm above the lower esophageal sphincter. Results: Of the healthy volunteers, LPR events occurred in 46.7% at pH 4 and in 86.6% at pH 5. After exclusion of mealtimes, the 95th and 90th percentile values for the percent of time the pH was <4 and that when the pH was <5 were 0.41, 0.18, 3.3, and 2.1, respectively. The 95th and 90th percentile values for the number of pharyngeal pH 4 and pH 5 reflux episodes were 12.8, 5.0, 16.5, and 14.5, respectively. Conclusions: Pharyngeal acid reflux episodes at pH 5 are present in most healthy adults. The present study provides prerequisite data for the evaluation of the etiologic role of the weakly acidic LPR for the occurrence of pharyngeal pathologic conditions in Koreans. (Kor J Neurogastroenterol Motil 2009;15:38-44)