NAND 組合論理回路의 缺陷檢出에 관한 硏究

崔興文 경북대학교 공과대학 1976 工大硏究誌 Vol.5 No.-

New techniques are presented for generating fault-detection experiments for multilevel combinational NAND networks. These networks are realized by applying GDT (Generalized DeMorgan's Theorem) to sum-of-product(or product-of-sum) form of logic equations. The structural characteristics of such networks are examined. It is shown that the fault-detection experiments can be generated in test vector units, directly from logic equations, without using any characteristic graph or Boolean difference. The techniques prsented provide simple means for finding the minimal number of the fault-detection tests from the logic exprssions only.

多重마이크로프로세서 시스템의 設計에 관한 硏究

崔興文 경북대학교 공과대학 1984 工大硏究誌 Vol.13 No.-

This paper proposes a Binary Combinated Multibus as an interconnection network for multimicrocomputer systems, and presents efficient broadcast and unicast algorithms for it. Every microcomputer node in this network has only two ports and all the buses are binary combinated through 2-ported microcomputer nodes. Maximum internode distance is 2, irrespect of network size, and there are 4 alternative short paths for each unicast which results in good fault tolerance. The proposed network structure is compared with that of Dual Bus Grid, Dual Bus Hypercube, and Generalized Hyperbus, and is considered to be an efficient interconnection for a small to medium sized multimicrocomputer systems.

AND-EOR 論理回路의 缺陷檢出에 關한 硏究

崔興文 慶北大學校 1975 論文集 Vol.20 No.-

This paper considers the reduction of the fault detection tests for AND-EXCLUSIVE-OR logic networks realized by GRM(Generalized Reed-Muller) expansion. It is proved that the AND-EOR network is completely controllable and, uisng control logic, the number of tests required for these networks can be reduced. The least upper bound of the number of the single fault detection tests is shown to be (n+3), independent of the function to be realized, where n is the number of the input variables. An efficient and systematic method for finding the minimal fault detection test set is presented.

난소의 미성숙 기형종 1예

최기욱,김흥곤,문형배 圓光大學校 醫科學硏究所 1994 圓光醫科學 Vol.10 No.1-2

The immature teratoma is the third most commin germ cell tumor of the ovary. It contains a variable amount of immature tissue derived from the three germ cell layers-ectoderm, mesoderm and endoderm. Most commonly the immature elements are neural origin. With the usage of chemotherapy following appropriate surgery, prognosis for patient with malignant germ cell tumor was improved considerably. We had experienced a case of immature teratoma of ovary. We report the case with review of the concerned literatures.

정상교합을 가진 유치열기 아동의 두부방사선 계측학적 연구

서문선,손흥규,백형선,최형준 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.1

소아치과 영역에서 아동의 두부방사선 계측치의 비교분석은 성장과 발육의 평가에 중요하며 부정교합의 조기진단과 치료를 위한 두개 안면부의 형태, 성장 양상을 아는 것에 필수적이다. 이를 위하여 두부방사선 계측학적 표준치가 중요한데 유치열기에 관한 연구는 많지 않으므로 유치열기 정상교합 아동의 표준치를 얻고 과거 연구에서의 계측치와 비교하고자 서울시내 소재의 유아원 아동 중 유치열기의 정상교합을 가진 4세에서 5세 아동으로 본원에 내원한 안모 및 전신 발육 상태가 양호한 아동 46명을 대상으로 측모 두부방사선 계측 사진을 촬영, 분석하여 다음과 같은 결과를 얻었다. 1. 골격상 계측항목에서 각도 계측치는 남녀사이에 유의한 차이가 없고 길이 계측치는 남자가 여자보다 전반적으로 큰 수치를 보였다. 2. SNA는 81.3°, SNB는 76.6°, ANB difference는 4.7°를 나타냈다. 3. Anterior cranial base length에 대한 Mandibular body length의 비율은 남녀모두 0.9:1이었고 Anterior facial height에 대한 Posterior facial height의 백분율은 남자 61.4%, 여자 62.1%를 나타냈다. 4. 치성 계측항목에서는 IMPA는 84.2°, UA to SN은 90.8°를 나타냈다. 5. Ricketts의 심미선에 대하여 상순은 2.6mm, 하순은 2.5mm 전방으로 위치하고 있었다. In the field of pediatric dentistry, comparison and analysis of cephalogram values of children are important for evaluation of growth and development, and are essential to evaluate the craniofacial form and growth pattern for early diagnosis of malocclusion. For this, cephalographic norm values are important, but not many studies on the primary dentition exist. To compare the past norm values of normal occlusion in the primary dentition with current norms, preschool children, 4 to 5 years of age, with normal occlusion in the primary dentition who visited our hospital were examined. Among these children, 46 children with normal facial form and developmental status were chosen for evaluation of cephalogram values. The following results were as follows: 1. For skeletal values, the angular values showed no significant differences between males and females, and the linear values were generally greater in males than females. 2. SNA was 81.3°, SNB was 76.6° and ANB difference was 4.7°. 3. The ratio for Mandibular body length to Anterior cranial base length was 0.9 : 1 for both male and female and the ratio for posterior facial height to anterior facial height was 61.4 % for male, 62.0% for female. 4. For dental values, IMPA was 84.2°, and UA to SN was 90.8°. 5. The upper lip to Ricketts esthetic line was positioned 2.6 mm anteriorly , and the lower lip to Ricketts esthetic line was positioned 2.5 mm anteriorly.

대장균 세포내 칼모듈린 돌연변이체 고발현을 위한 클로닝 및 Chemiluminescence 검출법에 의한 발현분석

오석홍,박윤식,양문식,최동성 우석대학교 자연과학연구소 1996 自然科學硏究論文集 Vol.1 No.-

To obtain a large amount of VU-4 calmodulin (115, Lys to Ile). VU-4 calmodulin gene with Ptac promoter (680 bp) was cloned into a plasmid, pUC18. Newly cloned pUC18/VU-4 was transferred into E. coli UT481. The plasmid isolated from cell extracts of the transformed E. coli was analyzed by restriction mapping and yielded the expected restriction endonuclease map with BamHI and EcoRI. Calmodulin was detected by Western blot analysis using chemiluminescence protocol and the estimated expression level was 60 pmole calmodulin/mg protein. Calmodulin was purified from the E. coli cell extracts by Ca^(2+)-dependent chromatography on a phenyl-Sepharose column. The purified calmodulin was identified as a mutant VU-4 calmodulin by SDS-PAGE and methyltransferase substrate test.

포트란 마이크로컴퓨터 시뮤레이터의 製作 및 그 應用에 관한 硏究

金三卯,崔興文,李相祚 경북대학교 공과대학 1978 工大硏究誌 Vol.7 No.-

This paper proposed a versatile Microcomulator Simulator Generator (MCSG) programmed in FORTRAN. This Generator MCSG can be applied to any general and can be used to produce a FORTRAN microcomputer simulator if the hardware purpose computer information and micro-operation sets are provided. A graphical representation technique was proposed for the analysis and comparison of four typical microcomputer systems selected for the generation and test of the simulator.

법랑모세포 분화와 법랑질 형성과정에서 OD314, Apin protein의 발현 및 기능

박종태,최용석,김흥중,정문진,오현주,신인철,박주철,손호현 대한치과보존학회 2006 Restorative Dentistry & Endodontics Vol.31 No.6

본 연구에서는 법랑모세포 분화와 법랑질 형성에 연관이 있는 OD314 일명 Apin protein의 기능을 밝힐 목적으로, in-situ hybridization에 의한 OD314 mRNA 발현과 법랑모세포 세포주에서 OD314 enamel matrix protein의 발현, 그리고 OD314 유전자를 과발현/억제시킬 수 있는 construct를 제작한 후 법랑질 형성 중에 OD314의 기능을 알아보고자 RT-PCR를 시행하여 다음과 같은 결과를 얻었다. 1. OD314 mRNA는 발생중인 상아모세포보다 법랑모세포에서 강하게 발현되었다. 2. Tuftelin은 석회화 결정이 형성되는 14일까지 발현이 지속되고, 그 이후부터 점차 감소하였다. Amelogenin과enamelin은 7일부터 그 발현이 점점 감소하였다. 3. U6-OD314 siRNA construct를 이용하여 transfection한 법랑모세포 세포주는 OD314와 tuftelin,MMP2 mRNA 발현이 감소하였으며, CM-OD314를 transfection하여 OD314의 과발현을 유도한 경우에는 OD314와 MMP20 mRNA의 발현이 뚜렷이 증대되었다. 이 결과는 OD314가 법랑모세포의 분화와 법랑질의 형성 그리고 석회화 과정에 중요한 역할을 하는 새로운 인자임을 시사한다. This study was aimed to elucidate the biological function of OD314 (Apin protein), which is related to ameloblast differentiation and amelogenesis. Apin protein, calcifying epithelial odontogenic (pindborg) tumors (CEOTs)-associated amyloid, were isolated from CEOTs, and has similar nucleotide sequences to OD314. We examined expression of the OD314 mRNA using in-situ hybridization during tooth development in mice. Expression of OD314 and several enamel matrix proteins were examined in the cultured ameloblast cell line up to 28 days by reverse transcription-polymerase chain reaction (RT-PCR) amplification. After inactivation and over-expression of the OD314 gene in ameloblast cell lines using U6 vector-driven RNA interference and CMV-OD314 construct, RT-PCR were performed to evaluate the effect of the OD314 during amelogenesis. The results were as follows: 1. In in-situ hybridization, OD314 mRNAs were more strongly expressed in ameloblast than odontoblast. 2. When ameloblast cells were cultured in the differentiation and mineralization medium for 28 days, the tuftelin mRNA expression was maintained from the beginning to day 14, and then gradually decreased to day 28. The expressions of amelogenin and enamelin were gradually decreased according to the ameloblast differentiation. 3. Inactivation of OD314 by U6-OD314 siRNA construct down-regulated the expression of OD314, MMP-20, and tuftelin, whereas over-expression of OD314 by CMV-OD314 construct up-regulated the expression of OD314 and MMP-20 without change in tuftelin. These results suggest that OD314 is considered as an ameloblast-enriched gene and may play the important roles in ameloblast differentiation and mineralization.

과수병해충 피해증상 진단프로그램

김동순,김기홍,전흥용,나승용,최용문,임명순 한국농업정보과학회 2000 농업정보과학 Vol.2 No.1

A diagnosis program of damage-symptom caused by fruit tree pest was developed using Portable Document Format (Docucom PDF). To construct program structure, the damage patterns of plants cased by pests and the morphological rhararteristics of pests were sorted by plant organs. Diagnoses are rallied out by selecting a host species > document symptoms arranged by plant organs > comparing similar symptoms of pests using step by step menu through damage symptoms. In addition, pest information can be accessed either through the scientific or common name of the pest organism.

SnO₂/TiO₂후막형 습도센서의 제조 및 특성

이건동,이재현,박효덕,이덕동,최흥문 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1

SnO_(2) doped with TiO_(2) and other activating agents, is used as a raw material to prepare humidity sensors. SnO_(2) is an n-type semiconductor whose resistance is described as a function of relative humidity. SnO_(2)/TiO_(2) thick film humidity sensors have been fabricated by using typical silk screen printing techniques. The humidity sensitivity of SnO_(2)/TiO_(2) thick film has been investigated. And the sensing characteristics of the fabricated SnO_(2)/TiO_(2) sensors such as resistance change and response time, has been investigated from R.H.20 % to 90 %. Experimental results show that the impedance-humidity characteristics of the humidity sensors depend on the microstructure of surface roughness and pore size distribution.