大邱地域 中小纖維企業의 輸出戰略을 위한 事例硏究 : 南安纖維會社를 中心으로

申壽澈,李承燁 啓明大學校 産業經營硏究所 1988 經營經濟 Vol.21 No.1

DOWN 症候群兒童과 一般精神薄弱兒童間의 口腔健康狀態에 관한 비교調査硏究

申承澈 단국대학교 1988 論文集 Vol.22 No.-

The author have surveyed 90 mentally retareded children in order to compare the oral health status of Down syndrom Group and other mentally retarded Group. Through the oral examination, collected the data of caries status, peridontal status, oral hygiene status, malocclusion status and dento-facial abnormalities status and compared each other. The obtained results are as followings: 1. df index and dft rate are comparatively higher in Down Syndrom Group than those of other mentally retarded group. 2. DMF index and DMFT rate are comparatively lower in Down Syndrome Group than those of other mentally retarded group. 3. There is no critical differance about soft deposit and oral hygiene index between Down Syndrome Group and other mentally retarded group. 4. Periodontal index in Down Syndrome Group is simillar to that of other mentally retarded group. 5. Incidencies of Class Ⅰ, Class Ⅲ, or Cross-bite of malocclusion status are high in Down Syndrome Group, but those of Class I malocclusion and open-bite are high in other mentally retarded group. 6. Incidencies of Peg Leteralis and Enamel hypoplasia are comparatively high in Down Syndrome. group. But those of dento-facial abnormalities are comparatively lower in other mentally retarded group than those of in Down Syndrome group. 7. It was recommended that more studies to promote oral health status for the mentally retarded and Down Syndrome children are needed.

다구치법에 의한 고 규소 내산주철의 용해주조공정 최적화

신제식,이상목,문병문,김정철,한동운,백승한 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.2

In this study, Taguchi method, one of the design tools of experiments, was applied to optimize casting process parameters of the high silicon corrosion-resistant iron. Three casting process parameters such as melting temperature, rare earth metal (mischmetal) addition, and pouring temperature were chosen. Using SN (signal-to-noise) ratio calculated from ultimate tensile strength of each experimental casting run, the relationship between the casting parameters and mechanical properties was statistically evaluated. The casting condition of a melting temperature of 1,650℃, 0.2% rare earth metal addition, and a pouring temperature of 1,350℃ led to an excellent ultimate tensile strength above 11 kgf/mm², which is beyond the industrial criterion. The effects of the casting parameters on mechanical properties and corrosion resistance were further confirmed by combined analysis of fractography, hydrogen content determination, microscopic test, and acid resistance test. (Received August 23, 2004)

쇼트피닝 가공 최적조건 탐색을 위한 실험적 연구

신용승,김태형,윤종학,노승남,이철구 서울産業大學校 2002 논문집 Vol.53 No.1

The shot peening process is most often used to improve fatigue properties of metal parts. In order to achieve optimum, repeatable and reliable fatigue enhancement from the shot peening process, the important shot peening parameters must be controlled. In this paper, the optimum shot peening condition is investigated. Rotary bending fatigue test was accomplished to investigate the effects of shot peening on the fatigue strength. Experimental results show that the fatigue strength was tremendously increased by optimum peening.

식품의 치아우식유발지수측정법 개발에 관한 연구

신승철,마득상,박덕영 단국대학교 치과대학 예방치과 1998 예방치과 세미나집 Vol.- No.12

The purpose of this study was to evaluate the reliability of the method for assessing cariogenicity of foodstuffs using pH drop by S. mutans, S. mutans was cultured with 8 ml of Tood-Hewitt broth for 7 hours. Then, this broth was centrifuged and 7 ml of supematant was removed and 1 ml of bacterial pellet was remained. Each 1 ml of 0.1%, 0.5% and 0.1% sucrose solution as the experimental groups and distilled water as a control group were mixed with these remained bacterial pellet and cultured at 37℃. The pH was measured at each 10 minutes for 2 hours. The caries potential index(CPI) was measured by calculating the width of area below pH 5.7 line. The reliability of the method was evaluated by comparing coefficients of variation of CPI. As the results, with concentration of sucrose solution between 0.1% to 1.0%, the method assessing CPI using S. mutans discriminated each CPI of solutions fairly well and was reliable.

Red Number 104호를 포함한 치면세균막 착색정제의 적정 색소함량 및 저작도포시간에 관한 연구

신승철,서현석,류현,장연수,변계영 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.1

The authors have examined the PHP index, in order to choose the optimum concentration, calivary flow volume and chewing time for Red-Plaque tablets, one of the newly developed disclosing agent for dental plaque. 4 kinds of tablets as 0.5㎎ of Red No.104, 1.0㎎, 2.0㎎ and 5.0㎎ were produced and 30 adults volunteers were selected for clinical experiments. PHP index were checked for extracted tooth of lateral incisor with artificial plaque and dyeing with various concentration of Red-Plaque, as well as for volungeerss 'teeth. Obtained date were analysed and compared. 1. Carbohydrate and protein were contained in dental plaque. 2. 2.0㎎/250㎎ to 5.0㎎/250㎎ of Red 104 contained Red-Plaque tablets were recommended to use checking the dental plaque clinically. 3. It needed more than 1 minutes chewing for disclosing the dental plaque enough, with a 250㎎ Red-Plaque tablet. 4. It was recommended that 2㎖ to 5㎖ volume saliva were needed to dissolve a Red-Plaque tablet of 250㎎ for 1 minute's chewing.

성인 남자의 식습관과 혈중 지질 농도에 관한 연구

신승렬,황보진향,박동철 慶山大學校 1997 論文集 Vol.15 No.1

This paper was carried out to study on the food & daily habit score and lipid contents in serum of adult man as basal research for research on the effects of food & daily habits on the lipid contents in serum of adult man. The number of normal, dangerous leval and hypercholesterolemia was each 133(60.5%), 62(28.2%) and 25(11.3%) of adult man. respectively. The mean age. weight. Broca's index(RBW) and Quetelet index(BMI) was 48.4 9.5. 67.7 10.2. 109.1 14.3, 23.6 3.0. respectively. The numbers of good food habits was 5.4 percentage, but those of bad food habits was 35.5 percentage, It was appeared to bad the mode of dietary and hormony of food. The contents of trigryceride and cholesterol in serum was 115.8 and 192.4mg/dℓ, respectively. The numbers of triglyceride contents(90∼120mg/dℓ in serum was 53(24.1%) of the subjects of research, and those of triglyceride contents (150-210mg/dℓ) in serum was 133(60.5%) of the adult man.

어린 나이에 피부암을 동반한 색소성 건피증 1예

신삼식,이지범,이승철,원영호 全南大醫大 2000 전남의대학술지 Vol.36 No.1

요부수핵탈출증에서 Thermography의 진단적 가치

신현택,신승우,송재철,정석희,이종수,김성수,신현대 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2000 No.-

Objectives : Lumbar radiculopathy is a common disease in oriental rehabilitation medicine. It can be diagnosed by physical examination, plain X-ray, Myelography, CT, MRI, EMG etc. But those methods are not useful in observing the clinical procedure. Objectvie evaluating the clinical procedure is very important in treatment of lumbar radiculopathy. Mehthods : We studied the clinical efficacy of thermography in lumbar radiculopathy during conservative managements. We studied 36 patients with lumbar radiculopathy convinced by MRI. The had low back pain and radiating pain on one side. Thermography had taken before an after 4 weeks treatments, and compared with clinical procedure Results and conclusions : Thermography is not pertinent as a primary diagnostic method in lumbar radiculopathy, but useful in observing the clinical procedure. And it can be recommended as a objective evaluation for lumbar radiculopathy.

弗素塗布한 齒牙에 DBS 法으로 부착한 Bracket의 탈락정도에 관한 實驗的 硏究

申承澈,車敬石 단국대학교 1987 論文集 Vol.21 No.-

The authers have experimented in order to measure the tensile strength limit of orthodontic bracket attached with DBS to tooth surface with fluoride application. 20 incisal teeth, 20 premolar and 20 molar teeth have been selected for the experiment and the half of the teeth have been applied with 2% NaF solution with electric stimulation and the rest half of the teeth have been natural. Each bracket have been attached to all experimental teeth through DBS method. And then, each experimental brackets have been removed with instron and measured the tensile strenght limit and observed removal portion. The obtained results were as followings; 1. there was no significant difference at relative tensile strength limit between natural group and fluoridated group in anterior teeth. 2. There was no significant difference at relative tensile strength limit between natural group and fluoridated group in premolar teeth. 3. There was no significant difference at relative tensile strength limit between natural group and fluoridated group in molar teeth. 4. The relative tensile strength limit was the most in premolar teeth and the least in molar teeth both in natural and fluoridated groups. 5. The method for attaching DBS bracket well to tooth surface was suggested because the removal portion of DBS brackets from the teeth were mostly at between resin and bracket surface. 6. It was recommended that fluoride application must be done to orthodontic patient with DBS bracket for preventing the dental caries.