치아 수복용 불소함유 glass filler의 제조 및 특성

김대성,최세영,김경남,김광만,김중곤 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.3

The purpose of this study was the reaching test of restorative glass according to composition. Mixtures of SrF₂, CaF₂and SiO₂were fused in platinum crucible. The glasses were ground and fraction which passed through a 400 mesh (38㎛) sieve were collected. The powder specimens were analyzed by a DTA and XRD. Then powder specimen were inserted to D. I. water with various of dissolution time and composition at 37℃. Fluoride ion, cation release, solubility, and pH change were estimated. It was clear that the glasses were formed except S0.65. In S0.40, Tg, Ts, and Tc were 630, 672, and 813℃ respectively. In initial 0.5 hrs., amounts of released fluoride ion and cation were about 90% of total released amounts and released rate was decreased with dissolution time. Amount of released fluoride ion and cation were increased with decreasing SiO₂ in glass filler. And released rate was decreased rapidly by adding CaF₂. This was caused by structural variation in glass filler. Solubility was similar tendency with ion released. The pH of D.I. water was 4.5. But in intial 0.5 hrs., pH was 8.2∼9.8., and decreased according to dissolution time. This is caused by ionic changing with cation and H* ion.

소에서 盲腸擴張을 동반한 第4胃食滯 手術 1例

김명철,김덕환,신상태,임준호,김남중,김종만 충남대학교 수의과대학 동물의과학연구소 1998 動物醫科學硏究誌 Vol.6 No.-

Abomasal impaction with cecal dilatation was diagnosed in a 3 years old holstein cow. The clinical signs were loss of appetite, scant feces and moderate distension of the abdomen. Ping sound was revealed in the right 11th intercostal space by auscultation. Cecal dilatation and abomasal impaction were ascertained by right flank laparotomy and abdominal exploration, and intestinal content and gas were removed from the cecal apex incised. One day later, 2.5㎏ of sand was removed by ventral paramedian abomasotomy.

신규 3작용성 메타크릴레이트의 치과용 광중합형 콤포짓트 레진용 단량체로서의 응용 연구

김중곤,정찬문,김민성,김광만,김경남 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4

Tris[4-(2-hydroxy-3-methacryloxypropoxy)phenyl]methane(THMPM) was prepared easily from triphenylolmethane triglycidyl ether in good yield. As compared with composite resin formulated with difunctional bis-GMA, the physical properties of a newly developed composite resin formulated with trifunctional THMPM was evaluated. Cytotoxicity and acute toxicity of composite resin based on trifunctional THMPM evaluated according to ISO standard method. The depth of cure of the composite resin based THMPM was higher than that of the bis-GMA composite. There were no significant differences in flexural strength and water sorption between the composites resin based on THMPM and bis-GMA. The water-solubility value for the light-activated composite resins formulated with THMPM was much lower than that for a control bis-GMA composite. According to cytotoxicity evaluation, the composite resin based on THMPM showed very mild cytotoxicity with the response index of between 0/0 and 1/0. No acute toxicity of composite resin formulated with trifunctional THMPM was also observed. It is believed that THMPM is promising candidate for application as a photocurable dental composite resin.

DELFT-3D를 이용한 울산신항 주변해역의 파랑특성에 관한 연구

김재중,김남현 東亞大學校 海洋資源硏究所 2005 硏究論文集 Vol.17 No.-

Environmental problems and safety problems in coastal area is one of the most important factors for designing coastal structures and maintaining facilities in coastal zone. And thus study on Wave transformation around coastal area is very important to develope a new port or on industrial area. Delft 3D-WAVE is applied to Ulsan new port area and the calculated results are analysed and compared with measured data. Delft 3D-wave module is based on SWAN model which considers wave shoaling and refraction for irregular wave. This module also covers wind effect, bottom friction, white-capping and wave breaking effect. The results of this study show a good agreement with measured data and thus Delft 3D-WAVE module can be applied to simulate wave transformation in coastal area.

耽津江 水系의 流量曲線式 開發

金雲中,鄭南先 朝鮮大學校 建設技術硏究所 1998 建設技術硏究 Vol.18 No.2

We have a lot of loss of lives with the economic damages due to the localized downpour on the seasonal characteristic of the Korea peninsular. In addition, as the cultivation area of crops for special use has been increased and the use of land including agricultural and industrial complex facilities has been advanced, a great deal of water consumption is expected continuously and then water for drinking, agriculture and industry should be reserved. So for the advanced use of water resource, Korea Water Resources Corporation plans to supply the water with neighboring regions by constructing Tamjin Dam at Janghung-Kun, Chonnam. This study measures discharge with current-meter and bar-buoys, the amount of water inflow into Bongsan region where is upper stream of Tamjin Dam, develops rating-curve which will be the basic material in planning the quantity of discharge from Jangsan region, the down stream of the Dam and then it is expected that it will contribute to the effective management and operation of water resources.

벼 생산경영 종합관리 S/W개발

김웅,김창수,김동원,국중덕,송영주,오남기,최영근 한국농업정보과학회 2001 농업정보과학 Vol.3 No.1

This programme consisted of 8 menus, which are basic information, job worksheet, technique information, management analysis, file management, window management, help and conclusion. The major functions of this programme by menus classified as follows : 1. The basic information menu, which consisted of a lots of basic farm management information, can be easily accessible to get general farm status of S/W users and inputted data used as basic data for farm management analysis. 2. In worksheet menu, users can easily access to record and search of farm work planning, contents of work, agricultural materials and selling status. 3. In management achievement menu, lots of indexes which represent one years' management achievements are produced and can be compare this years' achievements with last years' ones. This programme Delphi5 and Object pascal programme were used for tools and languages. Also Paradox4 and BDE were used for DB and DB engine respectively.

돼지 췌장 유래 엘라스타제의 항원성 시험

김순회,백남기,안병옥,이상득,이순복,김원배,양중익 A.R. Liss 1990 ENVIRONMENTAL MUTAGENS AND CARCINOGENS Vol.10 No.2

衛滿朝鮮의 王權과 地方統治體制

金南中 한국고대사학회 2004 韓國古代史硏究 Vol.33 No.-

A lot of historian has been studied to a political system of Wiman-Choson, the majority of them concluded that the immigrants, fled from China Yen(燕)ㆍCh'i(齊)ㆍ Chao(趙), had founded State Wiman - Choson through forcing out king Jun(準), the last king of Old - Choson, but they permitted the native to occupy the part of the political power in the government for not overwhelming them by force. But it is cleared that a founding core group of Wiman - Choson, the chinese immigrants and a Old - Choson people undergoing to be subjected by Yen(燕) and Ch'in (秦) state, assumed the reins of government. The king of Wiman - Choson was an absolute monarch, Irrespectively of his/her nationality and blood, being a government official of Wiman - Choson was to pledge allegiance to the king without exception. A founding core group of Wiman - Choson had experienced absolute government in China, They resided on the area that it ranged over from the east of Hon river(渾河) to the north of Ch'ong - ch'on(淸川) liver, the central area of Wiman - Choson. They were ruled by prefectural governors, Wiman - Choson enfeoffed the part of these area to loyal subjects and members of royalty, and dispatched Sang(相) there to watch the feudal princes, But the other hand, they were assimilated Old - Choson culture because they had adopt themselves the culture. The society of native Old - Choson had been operated tribalism, so Wiman - Choson ruled over the tribesman through the hand of their chief. Namely a order of king was reached to the chief only and not to the tribesman directly. Needless to say, Wiman- Choson dispatched prefectural governors, not administrative officials but army commanders, to the area, resided the native, at strategic positions for preventing them from rising in revolt and declaring independence.

탁구 선수의 경기력 수준과 성별에 따른 시합 시점별 대처 반응 변화에 관한 연구

김규석,남중웅 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

The purpose of this study was to investigate the changes of coping response for each point of time of a competition according to a performance level and gender. 154 high school table tennis players(male 81, female 73, superior 43, inferior 111) who participated in 20th President Flag table tennis tournament were selected for this study and KASCS(Korean Athlete Sport Coping Scale) questionnaires were used to measure problem focused, emotional focused, detached, avoidance coping factor. The results were as followings. 1. The change of coping response according to a performance level and the point of time of a competition statistically showed each significant difference by performance level, the point of time of a competition, interaction effect of a performance level and the point of time of a competition in problem focused coping factor and detached coping factor. Superior plays were higher than inferior players in problem and detached coping factor. 2. The change of coping response according to gender and the point of time of a competition statistically showed each significant difference by gander and the point of time of a competition in problem focused coping factor and emotional focused coping factor, and in terms of avoidance coping factor there was a statistical significant difference by the point of time of a competition Male players were higher than female players in problem and emotional coping factor.

합기도 수련자의 수련참여동기 분석

남중웅,김문헌 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.3

This research aimed to determine the participation motivation of hapgido (traditional Korean martial arts) practitioners, and what factors they consider in selecting hapgido martial arts halls. To this end, this research selected four hapgido halls in large cities, medium and small cities, and counties, respectively, that were operating in Daegu City and North Gyeongsang Province as of March 2003, with the geographical proportion taken into account. A cluster random sampling of a total of 250 people was done from among those trainees. Out of these, 32 cases were dropped due to insufficient answers or incomplete answers, and 218 qualified cases were finally adopted for the research. The Cronbach's alpha(a) of items asking about the participation motivation ranged from .61 to over .88, and the alpha for the entire questions stood at .91, thus giving high reliability to survey tools as used. Data collected from answered questionnaires were analyzed using descriptive statistics, t-test and one-way analysis of variance. The result of the analyzing of variables relations is as follows. First, there was no statistically significant difference in the average of sub variables for the practice participation motivation according to gender. Second, as a result of verifying the varying averages of practice participation motivation according to school grades, lower graders in elementary schools, overall, showed higher figures in all motivations except self-defense motivation. Third, there was no statistically significant average difference of sub variables for practice participation motivation according to religion. Fourth, as for the average difference of practice participation motivation according to recommenders, the average of etiquette motivation was higher in the order of the self-chosen group, parents-recommended group, and friends-recommended group. Regarding the character formation motivation, the parents-recommended group was more motivated than the other two groups. Fifth, as for the average difference of practice participation motivation according to the distance to the hapgido hall, the group with the distance of over 2㎞ had highest motivation for self-defense and health. The group with the distance of 500m-under 1㎞, had higher motivation for socializing and achievement than the group with the distance of 1km-under 2㎞.