평면연삭버어의 가공조건에 의한 영향

이광영,옥철호,서영백,박흥식,전태옥 동아대학교 공과대학부설 생산기술연구소 1998 生産技術硏究所硏究論文集 Vol.3 No.2

This study has been carried out to prevent and decrease the grinding burr under various working conditions; number of grinding passes, depth of cut, hardness of the materials and work speed. Grinding wheel is WA grinding wheel and workpieces are SM45C, SS41, SCM23 and STS 304. The results of tained from this study are as follows; The length of gringing burr increased with increasing grinding passes and it has nothing to do with materials and heat treatment. The size of grinding burr increased with increasing grinding depth and feed speed. The size of grinding burr decreased with increased cross setion and of workpiece. According as the hardness of material was increased, the width of grinding burr decreased conspicuously owing to suppression of plastic zone of burr root part.

1. 06㎛ Nd : YAG Laser를 이용한 요추간판탈출증의 경피적 수핵감압술

이흥선,변박장,최순관,신원한,권귀향,이인수,이경석,김범태 순천향대학교 1994 논문집 Vol.17 No.4

The 1.06㎛ Neodymium-YAG Laser(800 micron hemisherical) is revealed a useful tool for percutaneous laser disc decompression(PLDD). Especially PLDD would be applied to the management of lumbar disc herniation with minimal intervention. Total irradiated energy to one level of disc space was bout 1000 to 2000 joules. We performed this method at 10 levels, in 7 cases of patients, consisting of 4 males and 3 females with an average age of 37.7 years. Five cases showed excellent and good results, were observed. In two cases, open surgery was required because of unsatisfactory results. The best results were obtained in the protrusion type of disc herniation. We have summarized some advantages of PLDD: a) safe and simple procedure in an outpatient setting, b) avoiding general anesthesia, late spinal instability, c) possibility of repetitive use.

매복 상악 견치의 맹출 유도에 관한 증례 보고

이종갑,권태희,손홍규,김형태 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.2

Upper cuspid impation is a serious that occurs with sufficient frequency to justify diagnosis and intervention as early as a dental age of 8 years. The maxillary cuspid follows a more difficult and tortuous path of eruption than other tooth. Where upper arch crowding prevents such a tooth from following its normal eruption path, it will diverted either buccally or palatally. The diagnosis of canine impaction is on both clinical and radiographic examinations. When clinician detects early signs of ectopic eruption of canines, an attempt should be made to prevent theier impaction and its potential sequelae. Screening consists of identifying patients who lack a normal cuspid bulge on palpation, with follow-up radiographic evaluation where indicated. Selective removal of deciduous cuspids is a suggested interceptive measure in class Ⅰ uncrowded malocclusions. Each patient with an impacted canine must undergo a comprehensive evaluation of the malocclusion. The clinician should then consider the various treatment options available for the patient. Surgical exposure of the canine and orthodontic treatment to bring the tooth into the line of occlusion is the most desirable approach. After the surgical exposure of the impacted tooth, an auxiliary(button) is attached to the crown. It should be reemphasized that in the surgical exposure of an impacted tooth, only enough bone should be removed to allow for the placement of a bracket and that during the procedure the CEJ should not be intentionally exposed. The removable appliance was designed This applied traction along a desired path of eruption using elastics changed daily Removable appliance seemed to offer more in vertical anchorage than did the fixed appliances. 13 year-old male and 14 year-old female with impacted maxillary canine were treated with surgical exposure and direct traction.

전자 의료 카드를 위한 보건의료 정보 표준화 연구

박흥식,남승곤,안재억,김현의,김주한,정철규,김태진,이기한 대한의료정보학회 1998 Healthcare Informatics Research Vol.4 No.2

공과대학 교육과정의 개선 방안 연구

이흥호,노태천,한상옥 충남대학교 공업교육연구소 1997 論文集 Vol.20 No.1

This research intends to search for ways to improve engineering education. It was performed by referring to both statistical data on the supply, demand and employment of graduates from colleges of science and technology, and programs which they drew up to improve engineering education. Considering the given condition of engineering education and curriculum operation, the ways to improve engineering education are the following: 1) In order to keep the balance of supply and demand of manpower from between science and manpower from technology, the number of graduates from engineering colleges should be increased up to 4 times that from college of science. The imbalance of the number of graduates among majors or degrees should also be changed. 2) Excellent engineers who are able to adjust to practical business should be brought up from college, so that they will work in manufacturing industry. To do so, theory-oriented education should be avoided and new curriculum emphasizing practical business is needed. 3) The education ministry and related institutions must reduce the level to 20 students for a professor and increase up to $10,000 per student a year in order to improve the educational condition of engineering colleges. In order to improve the educational condition of private colleges, donation to private colleges should be widely given tax favors. 4) To improve engineering education, ⅰ) an evaluation system of professors and department is needed; ⅱ) the strengthening education with experiments and practices is needed; ⅲ) curriculum needs to be smoothly operated; ⅳ) changing majors/transferring schools should be allowed for students; ⅴ) a cooperation system among industry circles, schools and research institutes is needed. 5) A division system should not be forced, but rather we need to satisfy conditions to operate it, ⅰ) by reducing professors' teaching hours down to 6, ⅱ) by employing research professors, ⅲ) by increasing financial aid to each division. 6) There are a few points to be improved; in the case of a double major system, credits of the first major can become lower than those of the second major. In the case of division system, either students might have a lesser chance to choose minors, or cannot earn sufficient credits for a second major.

구호흡을 동반한 증식성 치은염 환자의 치료증례

이종갑,이남형,손흥규,김형태 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.2

Mouth breathing gives direct irritation to gingival tissue and increases gingivitis by increasing debris deposite. Generally, it is reported that gingivitis increases at puberty and it is mainly caused by microbial change and hormonal imbalance. This study included generalized gingivitis accompanying mouth breathing and localized gingival hypertrophy. This 11 years old female patient had no past medical history but she had menarchy a year ago. As a treatment, primarily eliminated the cause of mouth breathing and conducted tooth brushing instruction, scaling, and gingivectomy which resulted good.

11세 여아에서 발생된 성숙 낭성 기형종의 염종1예

이희민,김재현,이봉주,하태규,김흥곤,윤기중 圓光大學校 醫科學硏究所 1996 圓光醫科學 Vol.12 No.1

Mature cystic teratomas comprise 10% of all ovarian tumors and show the highest frequency of incidence in women under 20 years of age. Torsion of ovarian cyst is the most common complication in young female and lower abdominal pain, peritonitis, necrosis and shock are outcomes that require emergency treatment. Generally, gross finding of mature cystic teratoma shows that most of the entire ovary is replaced by multiple cystic masses, and rarely only small portion of the ovary is changed into cystic mass. We report a case of torsion of mature cystic teratoma in an 11 year old girl with a brief review of literature.

마이크로프로쎄서를 利用한 直流分捲發電機의 無負荷特性 測程에 關한 硏究

李興浩,盧泰天 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.2

This paper provides experimental results, obtained by using a microprocessor kit, from the no-load characteristics of the dc shunt generator. Although there are some errors in the experimental resuls because of limitations of A/D converter, it is considered that this study will be useful for the characteristic measurements of electric machines.

급성 심근경색증을 동반한 혈전성 혈소판 감소성 자반증 1예

이태희,김진혁,김완중,박지영,강흥선,조정휘,김권삼,송정상,배종화 대한순환기학회 2003 Korean Circulation Journal Vol.33 No.11

전북 林業試驗場 시험림內 植生別 토양응애類의 分布 및 諸 要因에 關한 硏究

李丙璇,金泰興,郭晙洙 全北大學校 1992 論文集 Vol.34 No.-

This study investigates the distribution of soil mite communities and various abiotic factors under different types of vegetation. Soil samples were taken on September 23 in 1987 and January 28, April 13, and July 9 in 1988 from five sample sites at the Forest Research Institute located in Chonbuk Province. Individuals of 5,475 soil mites were collected in this study. Among them 39 families, 62 genera, 119 species, and 4,312 individuals were classified into oribatid mites. Species similiarity index showed highest between the site D(Chamecypatis obtusa) and E(Cryptomeria japonica) where the environmental factors such as the altitude, pH, and the content of potassium in soil were similar. Seasonal changes in density of soil mites showed highest peaks in September and April, while lowest in July. Correlation coefficients between the density of soil mites and pH, OM, soil moisture, and the content of potassium in soil were statistically significant. Major abiotic factors that affected the distribution of soil mites were soil moisture, potassium, organic matters, and pH.