중심점 탐색없는 지문 정합 알고리즘에 관한 연구

장경식,임재영,최영규 한국기술교육대학교 2003 論文集 Vol.10 No.1

We propose a fingerprint matching algorithm that compares distance and included angle sequence among minutiaes with another's. We defined this sequence as minutiae constellation which has a basic unit is distance and included angle sequence among three minutiaes. This algorithm searches nearest minutiae from a minutiae and repeatedly searches nearest minutiae from just before searched minutiae. It doesn't search core and is independent of translation and rotation because matching stage only uses distance and included angle sequence.

일령에 따른 닭 태자 샘위의 조직학적 변화에 관한 연구

장재우,이형식,구세광 慶山大學校 基礎科學硏究所 1999 基礎科學 Vol.3 No.1

닭 태자의 샘위에서 일령에 따른 크기, 조직학적 변화를 관찰하기 위하여 부란 10일부터 부화직후에 걸쳐 10개군으로 구별하고 일반 조직학적 관찰을 실시하였던 바 다음과 같은 결과를 얻었다. 샘위는 전 연령에 걸쳐 긴 방추형으로 복강의 상부에서 관찰되었으며 크기는 부란 10일경에 직경 1.70±0.05mm, 길이 2.40±0.08mm로 관찰된 후 일령에 따라 증가하여 부화직후에는 직경 6.61±0.77mm, 길이 14.21±1.03mm로 관찰되었다. 조직학적으로 닭 태자의 샘위의 상피는 부란 초기 거짓중층원주상피로 구성되었으며 이후 단층원주상피로 분화되고 발생초기 상피의 함입에 의하여 proventricular gland가 형성되며 복합관상샘으로 분화되었다. 또한 점막상피는 다시 분화되어 부란 후기에 gastric gland를 형성하였다. To investigate, histological changes in the proventriculus of the chicken embryos with incubation periods. Samples were taken from 10 groups(10 days of incubation to hatching), and stained with H-E. The findings were as follows. The proventriculus of chicken embryos were observed by long spindle shaped in upper abdominal cavity and the size were detected that 1.70 ± 0.05mm in diameter and 2.40 ± 0.08mm in length at 10 days of incubation, after that the size were increased with incubation periods and in hatching, the size were reached at 6.61±0.77mm in diameter and 14.21±1.03mm in length. Histologically, the epithelium of the proventriculus were pseudostratified columnar epithelium in early incubation periods and after that these epithelia differentiated to simple columnar epithelium. The proventricular glands were made by invagination of surface epithelium in early incubation periods and after that these glands were differentiated to compound tubular gland type. In late incubation periods, the surface epithelium were differentiated twice and made gastric glands. The tunica muscularis and serosa were relatively well developed throughout all incubation periods but muscularis mucosa were observed after hatching.

Nortriptyline 제제의 생물학적 동등성에 관한 연구

신재국,차인준,장인진,정원석,김용식,박찬웅,신상구 大韓臨床藥理學會 1993 臨床藥理學會誌 Vol.1 No.1

위의 유암종과 선종의 병발 1례

장재식,강혁주,이중현,서영범,윤병구,김용섭,이구,서정일,양창헌,이창우,김정란,윤환중 東國大學校醫學硏究所 2000 東國醫學 Vol.7 No.-

유암종은 전신에 퍼져 잇는 장크롬친화성 세포에서 기원하는데 위의 유암종은 비교적 드문 질환으로 모든 유암종의 1.9~2.2%에 해당하며 위에 발생하는 종양의 1% 미만에서 보고되고 있다. 유암종은 일반적으로 증상이 비특이적이고 면역조직화학검사에 의해서 진단되기 때문에 과거에는 드물게 발견되었으나 최근 내시경 기기 및 술기의 발전과 검사 빈도의 증가 및 면역조직화학검사의 발달로 진단율이 증가 추세에 있으며, 드물지만 유암종에서 선암과 공존하는 예들이 보고되고 있다. 저자들은 심와부 동통을 주소로 내원한 70세 남자 환자의 상부위장관내시경 검사에서 위체상부의 대만곡에서 0.4×0.4 cm 크기의 중간 함몰을 가진 Yamada 1형의 용종과 함께 전정부의 전벽에서 0.8×0.5 cm 크기의 융기된 점막 소견을 보여 조직학적으로 각각 위유암종 및 위선종임을 확진한 후 내시경적 용종 절제술로 치료한 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Carcinoid tumors are arisen from enterochromaffin cells, which are scattered throughout the body. These tumors are composed of variable numbers of cells that contain endocrine granules in their cytoplasm, which can be identified by immunohistochemistry and electron microscopy. Gastric carcinoid tumors are relatively rare tumor, the reported incidence being 1.9~2.2% of all carcinoid tumors and less than 1% of all gastric tumors. Sometimes, composite carcinoid tumors and adenocarcinoma is reported. We experienced a case of the coincidence of carcinoid tumor and adenoma at the other site of the stomach in a 70 year old male patient. Gastrofiberscope showed 0.4×0.4 cm sized Yamada type I polyp with central depression on the greater curvature of the proximal body and 0.8×0.5 cm sized focal slightly elevated mucosa on the anterior wall of the antrum. The endoscopic biopsy specimens revealed carcinoid tumor and tubular adenoma with moderate atypism, respectively. The carcinoid tumor and adenoma were removed by endoscopic polypectomy. According to the follow-up gastrofiberoscopy after 7 month later, both lesions were nearly normal mucosa except whitish atrophic change after polypectomy.

WEL-TEN60 母材와 熔接材의 低溫 引張 및 衝擊特性에 關한 硏究

金載勳,沈奉植,邕章祐 忠南大學校 産業技術硏究所 1987 산업기술연구논문집 Vol.2 No.2

This study was aimed to determine tensile and impact properties of base and weld metals of WEL-TEN60 of temperatures from-70℃to 70℃. It is particularly important to assess tensile properties, absorbed energy change, lateral expension ratios and fracture appearance in order to prevent brittle fracture of this material at low temperatures. The obtained results were as follow: In case of base metal, the ultimate tensile strength, yield strength and elongation increase as the temperature decreases. The weld metal showed almost the same reactions as the base metal did. The fracture morphology of base and weld metals was that of dimple fracture at all temperature ranges. The dimple size got smaller as the temperature decreased. The fact that as the temperature increased, the absorbed energy increased seemed due to the increase of loading time. The curves of fibrous fracture, lateral expansion and absorbed energy kept almost the same shape. We came to conclusion that when we applied 15 ft-1b CVN temperature, the materials are safe from brittle fracture over-70℃.

주물사 부산물의 정제에 관한 연구

이재장,노범식,문영배 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-

연구에서는 주물사용 규석의 생산과정에서 발생되는 부산물인 미립 분말의 부가가치를 향상시킬 수 있는 기술개발을 통하여 자원의 절약과 재활용은 물론이고, 환경오염 문제의 해결에도 기여하고자 하였다. 성분분석 결과 입자 크기가 큰 경우에는 SiO2의 함량이 낮고 다른 불순물의 함량이 많았으며, 부산물의 경우는 SiO2의 함량이 94.37%로 비교적 낮고 Fe2O3, Al2O3 및 K2O의 함량이 상대적으로 높았다. XRD 분석 결과 석영 이외에 백운모가 상당량 포함되어 있어 품위 및 회수율 향상에 영향을 미칠 것으로 생각되어 이를 효과적으로 제거 할 수 있는 자력선발과 비중선별을 이용하였다. 자력선별 실험결과 부산물(tailing)의 경우 SiO2 품위와 산출률은 각각 98.42%와 87.35%까지 향상되었으며 Fe2O3의 함량은 0.17%이었다. 비중선별 결과 SiO2 품위와 산출률은 각각 96.08%와 91.16%까지 향상되었으며 Fe2O3의 함량은 0.30%로 자력선별의 경우보다 효율이 좋지 않았다. 부산물(tailing)을 대상으로 Attrition Mill로 알루미나 볼과 스테인레스 볼을 Grinding media로 이용하여 60min 정도 분쇄한 결과 평균입도 2~3㎛ 정도의 미립 실리카 분체를 제조할 수 있었다. Representative samples of solid molding sand wastes were obtained from Kwang-Jin Industrial Co. located in Chunchon. The molding sand wastes contains mainly fine iron particles, iron oxides and mica group minerals. Sand grains are angular because of being produced by the impact crushers. This study was carried out to develop an effective and economic purification technique for removing iron minerals by using magnetic separator and Mozley table. Results of experiment using the magnetic separator showed the production ratio of SiO2 increased up to 98.42wt.% and 87.35wt.% and the amount of content of Fe2O3 was 0.17wt.%. and those using the Mozley table separator showed SiO2 up to 96.08wt.% and Fe2O3 was 0.30wt.%, respectively. In grinding tests, silica flour of mean size 2~3㎛ was produced using attrition mill by stainless ball and alumina ball grinding about 60 minutes.

반자동 영상 캐릭터 설계 시스템

안재민,유헌우,장동식 한국경영과학회 2002 한국경영과학회 학술대회논문집 Vol.- No.1(1)

In this paper, a new semi-automated cyber character generating method is presented. Local edge detection tools extract face contour from graphic image files. Some graphic manipulation process detailed touch to obtain neat face contour. This method shortens the making process dramatically while maintaining the good quality similar to real face image. Some of the processed images are illustrated for clear explanation.

아크릴로니트릴 제조공정에서 혼합용매를 이용한 아세토니트릴 회수에 관한 연구

김재경,최성욱,이진우,장윤식,박동원 한국공업화학회 2003 응용화학 Vol.7 No.2

We studied on the phase equilibria of quatemary liquid-liquid extraction system containing acetonitrile-water-binary solvent at 25℃, latm, Ethyl acetate Toluene was used as binary solvents. Binodal curve, tie line, distribution and selectivity for each quatemary system have been determined in order to investigate the effect of using binary solvent in extracting acetonitrile from aqueous solution. And these experimental tie-line data were also compared with the values predicted by UNIFAC model. It was shown that UNIFAC model is capable of predicting the tie-line in these quaterrary systems within an average RMSD of 1.45mole%.

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.

정선 지역 석회석의 소성특성 연구

이재장,최재석,노범식,문영배 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A

Lime is one of the world's most useful chemicals and manufactured in various types of kilns, using various fuels. Quicklimes vary in reactivity with water due to variations in the time and temperature calcining process and type of kiln used. Careful attention and control of time and temperature in the calcining process is necessary to insure a highly reactive lime. Excess time and temperature will cause the lime to be over burned. The highest reactivity of quicklime is obtained by calcination of limestone in the particle size of 0.1cm∼2cm, calcination temperature of 1000℃, calcination time 90min. It was found by the scanning electron microscopes that pores of quick lime is reducted if the soft burned quick lime is heated continually.