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Kodak Insight 치과필름의 방사선학적 특성에 관한 연구
송영한,신민,이병도 원광대학교 치의학연구소 2003 圓光齒醫學 Vol.12 No.1
The purpose of this study was to investigate the characteristic curve of new marketed, Insight dental X-ray film(Esatman Kodak Co. Rochester, NY, USA) Kodak Ultraspeed(DF-58), E-speed Agfa Dentus M2 and Kodak Insight(IP-21) films were radiographed with Trophy intra-oral radiographic machine. 10 steps exposure times such as 0.12, 0.22, 0.30, 0.40, 0.50, 0.62, 0.76, 1.02, 1.30, and 2.0 seconds were prepared and each step exposure were monitored onto FH 40G(ESM Eberline Instruments) dosimeter with those 4 types intra-oral films. All films were manually processed according to manufactures instruction. We measured radiographic densities of 6 sites of each processed film. Then we could make characteristic curves of 4 types intra-oral films with these dosimetric data and radiographic densities, based on ISO 5779. Base plus fog densities were measured from unexposed, processed films. We measured the film contrasts from average gradients of characteristic curves according to various radiographic density level. Film speed could be thought as an exposure of 1.0 above base plus fog density. We compared film contrast, speed and base plus fog density of Insight film with those of 3 other films. The obtained results were as follows; 1. E-speed film showed greatest average gradients followed by Insight film. E-speed and Ultraspeed film showed great average gradients on low density level. 2. Insight film showed a fastest speed followed by E-speed, Dentus M2 and Ultraspeed film 3. Dentus M2 film showed greatest base plus fog density level followed by Insight film. Therefore, Kodak Insight film showed fastest film speed with comparable film contrast on characteristic curve.
CSB^(+)-Tree 기반의 DTD 통합 그래프를 이용한 XML 문서 저장 시스템 설계 기법
신성현,송화선,김진호,정영준 강원대학교 정보통신연구소 2004 정보통신논문지 Vol.8 No.-
As information processing recently increases over Internet. there have been many researches about designing an efficient storage system to process a huge amount of information, which is based upon DTD in XML However, most of them have some difficulties in meaningful and structural presentation of XML documents and some restrictions in integration of many heterogeneous documents. In other word, we need a storage system which well-defines the structure of heterogeneous XML documents and integrates them. In this paper, we proposed a technique of an XML documentation storage system using DTD integration graphs based on CSB+-tree. This technique retrieves structural information from elements of XML documents, creates a CSB+-tree based DTD integrated graphs of the man storage system, and generates an integrated storage system by using element mappings. The proposed technique utilizes the man storage system more efficiently in space and provides more faster response time.
辛炯泰,金贊昊,金鍾奭,宋永祿,林泰鎭 成均館大學校 1982 論文集 Vol.32 No.-
Nylon bag dry matter digestibility (NBDMD, %), nylon bag organic matter digestibility (NBOMD, %) and chemical compositions were analysed to evaluate the nutritive values of 5 varieties of NaOH-treated wheat straws (Jangkwang, Wonkwang, Suwon 210, Suwon 211, Naemil) by using Korean native male goats. Three grams of dried samples by grinding with 2.45㎜ Wiley mill screen were put into a bag 9×14㎠ made of 100 mesh nylon. These bags were put into the ventral sac of the rumen and taken out at the end of 72 hours. They were washed, dried in an oven at 105℃ for 24 hours and weighed “NBDMD” (%) and ashed in an muffle furnace at 600℃ or 24 hours and weighed “NBOMD”(%). The results which were obtained with this experiment were as follows: 1. Nylon bag dry matter digestibility (NBDMD, %) and nylon bag organic matter digestibility (NBOMD, %) of NaOH-treated wheat straws were highly significant different (p<0.01) in different levels of NaOH treatment and of different varieties of wheat straws. 2. The relationship between total mean NBDMD (%, Y_1) of 5 varieties of wheat straws and NaOH concentration (%, X) at 72 hours rumen incubation was: Y_1=34.57+3.56X(r=0.92^**) 3. The relationship between total mean MBOMD (%, Y_2) of 5 varieties of wheat straws and NaOH concentration (%, X) at 72 hours rumen incubation was: Y_2=32.02+2.46X(r=0.92^**) 4. The orders of NBDMD(%) and NBOMD(%) for 5 varieties of wheat straws were Suwon 210, Suwon 211, Naemil, Jangkwang, Wonkwang and Suwon 211, Suwon 210, Naemil, Jangkwang, Wonkwang, respectively. 5. The optimum level of NaOH for improving NBDMD(%) from 5 varieties of wheat straws, on the basis of Blaxter et al. (1961), was 6% NaOH.
직경 1˝ 자성관에서의 원격장와전류 탐상 실험 빛 결함신호 특성
신영길,이창준,이정호,이윤태,장권규,송성철,송성진,정태언 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-
In this study, a remote field eddy current testing system is built to inspect 1˝ diameter ferromagnetic tubes and resulting experimental signals are investigated. To decide the operating frequency, the emf of sensor coil is monitored while the sensor coil is moved away from the exciter. At proper frequency, sudden change would occur in the signal pattern. This also indicates the location of remote field region, so that the distance between coils can be decided. The defect signal contains two defect indications, each appears as the sensor and exciter coil passes a defect. Experimental results show that defect depth can be estimated by comparing the two indications. Also, linear relationship between defect depth and phase signal strength is observed.
혈액투석중인 만성신부전 환자에서 골대사 지표로써의 Osteocalcin치
송치운,이진홍,안미애,윤환중,윤상임,성기양,이강현,송민호,이강욱,신영태,김영건,노흥규 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2
Background : Serum osteocalcin is synthesized by osteoblast and has been shown to be sensitive indicator of bone turnover inpatients with various metabolic bone disease. In renal osteodystrophy, serum osteocalcin is elevated due to decreased renal clearance and elevated level of PTH. This study was done to evaluate the usefulness of serum osteocalcin as a marker of bone metabolism and the correlation with other biochemical markers of bone metabolism. Methods : We measured serum osteocalcin, calcium, phosphorus, ALP(alkaline phosphatase) and PTH(parathyroid hormone) in 37 patients with end stage renal disease on hemodialysis. Osteocalcin was determined by radioimmunoassay and PTH was determined by radioimmunometric assay. Results : 1) The mean level of serum osteocalcin in ESRD patients was 233.8± 218.2ng/ml which was significantly higher than that of controls(p<0.0001). 2) The mean level of serum PTH in ESRD patients was 40.5± 43.8pg/ml was significantly higher than that of controls(p<0.005). 3) There was a significant positive correlation between the level of serum PTH, ALP and the level of serum osteocalcin in ESRD patients. 4) By using multiple regression, PTH is most reliable factor that affect to elevated level of serum osteocalcin ( beta coefficient = 0.687, Sig T<0.05). Conclusion : Serum osteocalcin as a marker of bone metabolism in ESRD patients is more useful than other biochemical marker such as serum calcium, phosphorus, ALP and PTH is a most reliable factor that affect to elevated level of serum osteocalin.
Cu(3-amino-1-propanol)X_2 (X=C1, Br)의 분광학 및 자기적 성질
송영신,박윤창 성균관대학교 기초과학연구소 1988 論文集 Vol.39 No.1
The Spectral and magnetic properties of [Cu(3-amino-1-propanol)X]_2 where X=Cl and Br have been studied and are compared with those of dimeric copper (Ⅱ) acetate monohydrate. The exchange interaction parameter J of [Cu(3-amino-1-propanol)Cl]_2 is estimated to be 391cm^-1, the zero field splitting parameters are D=0.438cm^-1 and E=0cm^-1. On the other hand the magnetic parameters of [Cu(3-amino-1-propanol)Br]_2 can not be obtained because its EPR spectrum shows only one absorption line that is broad and superimposed with the line due to monomer. The calculated Cu-Cu distance is 2.81Å. The super exchange interaction through alkoxo bridge is considered to be dominant rather than the direct exchange interaction through copper-copper. The visible, infrared and far-infrared spectra of these compounds are also discussed.
수술적으로 치료한 통증을 동반한 흉추부의 후외상성 Schmorl씨 결절 : 2례 보고 Report of Two Cases
신병준,이재철,송화용,정석봉,권계원,조영일,김연일 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2
Study Design : Two patients who had painful Schmorl's node at thoracic level from acute trauma were adopted and taken operation for its treatment Objectives : To document the effect of operation for the treatment of painful Schmorl's node at thoracic level summary of background data : Schrmorl's nodes are common spinal lesion generally believed to be asymptomatic, but in some cases there were painful symptom by Schmorl's node. This case report is to explain the effect of operative treatment for the painful Schmorl's node. Methods : Two patients were adopted who had traumatic painful Schmorl's node at thoracic level for our case report. They were treated conservative methods at first but it's effect were poor, so they were taken anterior decompression and fusion, and checked back pain symptom. Result : In all two patients, the symptom of back pain by Schmorl's nodes at thoracic level was almost subsided. conclusion : For the treatment of traumatic painful Schmorl's node, most of surgeon says that conservative treatments were treatment of choice, but operative treatments are also benefit to subsidence of back pain by Schmorl's node.