니트섬유강화 복합재료의 기계적 성질에 관한 연구

한길영,이동기,최병기,오환교,신용욱,전수영 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2

Using conventional textile techniques such as weaving, braiding, knitting and stitching it is possible to produce a wide range two and three dimensional fiber preforms. However, so far only a limited attention has been given to knitted fabrics in composite industry. This is mainly due to the opinion that knitted fabric reinforced composites posses low mechanical properties owing to their looped fiber architecture. But it is possible to obtain desired mechanical properties by selecting proper knitted fabric structure. In this paper, tensile failure load and displacement of one yarn, four yarns and knitted fabrics of ten yarns of kevlar fiber were determined experimentally in the unidirection. Mechanical properties of plain weft knitted fabrics reinforced composite intrusion beam for car side door application were investigated experimentally, which compared with desire value of American Fedral Motor vehicles Safety Standard (FMVSS) and presented the results.

가자의 즉각형 알레르기 반응 억제 효과

엄용대,신민교,이영미,김형민,신태용,정종길,송호준 대한본초학회 2000 大韓本草學會誌 Vol.15 No.1

We investigated the effects of methanol extract of Fructus Chebula (MEFC) on local and systemic anaphylaxis. Passive cutaneous anaphylaxis inhibited to 61.42 12.8 % by oral administration of MEFC(I.0 glkg). MEFC inhibited compound 48/80-induced anaphylactic shock 100% with doses of 0.05-1.0 glkg . Administrations of MEFC (1.0 glkg) 60 min before, 5 min after, and 10 min after the compound 48/80 treatment were shown the mortality rates as 0%. MEFC (0.01-1.0 glkg) inhibited the histamine release significantly from the rat peritoneal mast cells by compound 48/80. These results indicate that MEFC inhibits mast cell mediated anaphylactic reactions by inhibition of mast cell degranulation in vivo and in vitro.

韓國寺刹의 空間構造와 信仰形態에 關한 硏究

최창길,예명해,신상화,이용대 대구대학교 과학기술연구소 1999 科學技術硏究 Vol.6 No.2

This research takes up DONG HWA(桐華) temple, PA GYE(把溪) temple, UN HEA( 銀海 ) temple, UN BU(雲浮) temple, and the HWAN SUNG(環城) temple, which makes clear the space structure and the belief form of those Buddhist temples. The above-mention temples have been already investigated in other research's. However Now day, The temples are a lot of changes so it is necessary to clarify the current situation. Moreover Each Buddhist temples was not investiaged detaily. So this research's aim is current temple's situation investigation and each temple's detailed reserch 1) The construction of all temples goes back even to the Silla Dynasty. However, the arrange ment structure of then Buddhist temple was completion of the arrangement structure with the courtyard clearly now in a Chosun Dynasty. Especially, the construction time of the grand gate which the component of such an arrangement structure to be assumed the 17th century of which the middle of a Chosun Dynasty. 2) Moreover, it is a building where it was built to be paid objects is deified to these buildings are 山神(SAN SIN), 獨聖(DOK SUNG), and 七星(CHIL SUNG). Especially being paid attention is 山神(SAN SIN) belief. There was a belief to 山神(SAN SIN) from ancient times. However, coming to be deified in the temple is from a furnace in the 17th century. By the way, it was able to be confirmed to have come to be built in the temple which had been investigated by this research in the 20th century in the latter half of the 19th century.

苗令 및 硬化處理가 黃色種 담배의 初期生育 및 收量에 미치는 影響

盧載榮,安長憲,裵吉寬,申周植,李炅珉 충북대학교 엽연초연구소 1984 煙草硏究 Vol.11 No.-

This experiment was conducted to investigate the effect of seedling age, hardening time and hard-ening degree on the growth and yield components of flue-cured tobacco. Variety used was NC 2326. The results are summarized as follow; 1.Time of period from setting to topping, that from setting to the end of harvest, and that from topping to the end of harvest were longer in 50-day seedling than in 60-day seedling. And there was little difference of the time of period from sowing to the end of harvest between 50-day seedling and 60-day seedling. 2.C.G.R. was high in 50-day seed]ins than in 60-day seedling until the late maximum growing stage. In the 60-day seedling, growth continued late, and as a result of this, the stem height and number of leaves per a plant at topping time were higher in 60-day seedling. 3.The growth was most desirable in the recommended hardening(4.5ℓ/3.3㎡ ㆍ day ). The growth rate of severe hardening(1.5ℓ/3.3㎡ ㆍ day ) was high during the period from establishing to middle part of maximum growth. Se there was little difference of glowing characters among the plots of different hardening degree. 4.The leaf area of lugs and cutters was larger, and the weight of unit leaf area and percentage of dry matter in the plot of 60-day seedling were lower than those in other plots. 5.The leaf weight per plant, in the plot of recommended hardening was higher than that in the plots of without hardening and severe hardening. 6.There were little effects of tome of hardening on the growth and yield components.

중국 채소산업의 경쟁력 분석

권용대,신용길 충남대학교 농업과학연구소 2005 농업과학연구 Vol.32 No.2

This study is to provide a comprehensive overview of the changing vegetable sector of Chinese agriculture and to analyse the competitiveness of Chinese vegetable production. China now produces more than 60% of the world's vegetable supply and that 150 million people are engaged in vegetable production, processing and marketing since the reform of vegetable industry structure started in the late 1980s. As a labour abundant industry, China also features more comparative advantages in the vegetable trade. Although China's vegetable exports still accounts for only 1% of total production, the 5 million tons of export in 2003 makes China one of the largest vegetable players in the international markets. When estimating competitiveness of China's vegetable industry, China's producers' prices for vegetables are founded to be only from 10%~40% of what they are in Korea, while most of China's vegetables have also strong competitiveness in quality. As China joined the WTO in 2001 and expects to increase market share in vegetable trade, the development strategy for Korea's vegetable industry are suggested as follows: 1) focusing on the technology for the growth of vegetable productivity, 2) developing the higher value added vegetable industry through processing, 3) expanding the exported area and leading vegetable varieties.

양측 하악과두 골절에 대한 관혈적 정보술후 나타난 근약화와 시력장애 : 증례보고

정기훈,신용길,김태열,신재명,윤규호,전인성 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.6

The condylar fracture show high occurrence rate in the following of symphysis and angle, because it is easy to have concentration of outer pressure due to its long and narrow anatomical shape and mouth opened state when trauma is attacked. For the clinical findings, there are trismus, opening deviation, mal-occlusion and open bite The classification of condylar fracture is varied due to the location of condylar bone fragment, fracture site. There are conservative and surgical methods for treatment modalities. Because of many advantages, conservative method is widely used it has no particular limits of treatment adjustment but the cases of absolutely surgical correction indication are easily found in clinical experience. Although many methods are suggested for treatments of condylar fracture, there are no particular surgical methods for precise reduction due to difficult accessibility in high condylar neck fracture. For precise reduction of condyle, we used Nam's method. However, in Nam's method, because condyle is fixed when once it is kept off externally reduced in avascular state, so complication such as condyle resorption is pointed out as a problem. In our clinic, we obtained some knowledge by treating a patient who had muscle weakness and vision disorder after temporary airway obstruction follownig the both condylar fracure operated using Nam's method, so here we reported the case with a study of documents.

요부 외측구역 협착증에서 단순감압술과 기구고정술을 병행한 요추체간 골유합술과의 임상적 비교

손병길,최은석,정을수,신종현,김명진,지용철 대한척추신경외과학회 2004 Neurospine Vol.1 No.1

Objective: The lumbar spinal canal can be devided into the central zone and the lateral zone. The divisions of the lateral zone are the subarticular, the foraminal, and the extraforaminal zone. A common causes of the operation for the spinal stenosis are related to the association with the spondylolisthesis and the central stenosis. There is a paucity of data, however, regarding the operative intervention in the lateral zone stenosis(LZS). Our aim was to analyze the surgical result by the anatomical type and the operative method. Methods: 72 patients of LZS excepting the association with the spondyolisthesis have been operated by six neurosurgeons of our hospital from 30th April, 1994 through 30th September, 2002. The patients had been interviewed about surgical result through telephone by third party persons. The surgical results were analyzed by the four score rating system: ① medication, ② ADL(Ability of daily living), ③ the degree of improvement, ④ the degree of satisfaction. Results: Among 72 patients, there were 25 males and 47 females. The age group of the patients were in their thirties(1), forties(9), fifties(21), sixties(36) and seventies(5). Surgical methods were used on decompression(22), posterior lumbar interbody fusion(PLIF) with cage(1) and PLIF with transpedicular screw fixation system(49). The types of stenosis were subarticular(24), foraminal(16) and extraforaminal(30) and double crush(2). The overall surgical results were Excellent(18), Good(34), Fair(19), and Poor(1). The Non-success rate according to the methods of surgery were decompression(34.8%), PLIF with transpedicular fixation system(24.4%). The overall success rate was(53/72: 73.6%). The success rate according to the types were subarticular(17/24: 70.8%), extraforaminal(21/30: 70%), and foraminal(12/16: 75%). Conclusion: It is suggested that the result was more favorable on the cases of lateral zone stenosis operated with PLIF and transpedicular fixation system. According to the method used, the success rate of decompression was worse than PLIF with transpedicular fixation system.

韓國寺刹의 空間構造와 信仰形態에 關한 硏究

최창길,신상화,이용대,이광명 대구대학교 과학기술연구소 2000 科學技術硏究 Vol.7 No.2

This research takes up YONG-YOUN(龍淵) temple and NAM-JI-JOUNG(南地藏) temple which makes clear the space structure and the belief form of those Buddhist temples. The above-mention temples have been already investigate in other research's. However Now day, ne temples are a lot of changes so it is necessary to clarify the current situation Moreover Each Buddhist temples was not investigated detaily. So this research's aim is current temple's situation investigation and each temple's detailed reserch 1 ) The construction of all temples goes back even to the Silla Dynasty . However, the arrangement structure of then Buddhist temple was completion of the arrangement structure with the courtyard clearly now in a Chosun Dynasty. Especially, the construction time of the grand gate which the component of such an arrangement structure to be assumed the 17th century of which the middle of a Chosun Dynasty. 2) Moreover, it is a building where it was built to be paid attention most in the space structure of the investigated Buddhist temple for folk beliefs. Belief objects is deified to these buildings are 山神(SAN SIN) , 獨聖(DOK SUNG), and 七星(CHIL SUNG). Especially being paid attention is 山神(SANSIN) belief. There was a belief to 山神(SAN SIN) from ancient times . However, coming to be deified in the temple is from a furnace in the 17th century. By the way, it was able to be confirmed to have come to be built in the temple which had been investigated by this research in the 20th century in the latter half of the 19th century.

하악골 골절 환자에 있어 수술후 합병증으로 발생한 골수염의 치험례

윤규호,전인성,신용길,박준호,허남오,방석준 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.4

The term osteomyelitis literally means inflammation of bone marrow. It is described as an inflammatory condition of bone primarily engaging the medullary Following circulatory collapse and ischemia, the involved portions of the bone become necrotic. Cellulitis and osteomyelitis are the most frequent complications of fractures of the mandible and maxilla, because there is an abscessed tooth in the line of fracture. Since most fractures are compound fractures, infection may develop because of contact with oral secretions or outside air. The treatment of chronic osteomyelitis is still under debate. Some authors rely on antibiotics alone, while others advocate combination with surgery. But when infection occurs, establish proper drainage and administer antibiotics. Author treated a case of infected mandibular fracture with mandibular osteotomy, sequestrectomy, iliac bone graft and hyperbaric oxygen therapy, who had suffered suppurative osteomyelitis and mandibular nonunion following the open reduction of the mandibular fracture.

영구자석 동기발전기의 정주파수 정전압 출력에 관한 연구

우정인,조용길,황정원,송호신 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.2

The permanent magnet machines have the advantages of high efficiency and power density, features very improtant for air-borne applications with their requiement of no external dc supply for rotor excitation, in addition, a very lower synchronous reactance thus making it a stiff source of power with a higher steady state and more transient capability than ist counterpart, the wound rotor type. In this paper, The permanent magnet synchronous machine is taken as a power source in the variable speed constant frequency power conversion scheme with converter-inverter system. All digital routines are excuted in the sampling time of 100 micro second by a DSP Board (TMS320c25) with A/D converters, which is detect the load current, capacitor current and DC link voltage at a sudden load change and to compute the predicted current. In one sampling interval, two optimal space voltage vectors as well as tow zero voltage vectors are employed so that the capacitor current may follow the reference. As a result, sinusoidal output constant voltage is obtained while swiching frequency is constant, and experimental results are presented, which shows the effectiveness of the proposed control method.