포스파젠 분리막을 이용한 금속이온의 분리

李炳哲,朴在圭 홍익대학교 산업기술연구소 1999 産業技術 Vol.9 No.-

Poly〔bis(trifluoromethoxyethoxyethoxyethoxy)phosphazene〕was casted by dip coating method into membranes supported on porous polypropylene mesh filter sheet for metal separation testing. A solution of Cr^3+, Co^2+, Mn^2+ nitrates was used in diffusion experiments which conducted from 25 to 60℃. Membrane of poly〔bis(trifluoromethoxyethoxyethoxy-ethoxy)phosphazene〕was found to separate Cr ion from Mn and Co ions with separation factors of 2.0 at 60℃. Diffusion activation energy were calculated from diffusion coefficients.

2D영상에서의 CONVEX HULL처리를 위한 SPLINE활용 연구

이병일,서재현,최흥국 인제대학교 1997 仁濟論叢 Vol.13 No.1

본 논문은 2D image에서의 object boundary representation을 위한 여러 가지 알고리즘중[6] convex hull 처리를 위해 스플라인(spline)을 도입한 방법을 제시하였다. 연속적인 점들에 대한 곡선의 추출은 각 점에서의 기울기를 일차 미분을 통해 연속적으로 처리하고, 그 점들을 이용해서 boundary region을 위한 point를 찾아낸 다음, 스플라인을 활용하여 boundary region을 추출해내는 것이다. In this paper, I studied about spline curve for convex hull at 2D image. There are many algorithm of boundary representation, but spline is new challenge for boundary representation and tracing. The purpose of this paper is to apply spline to convex hull at 2D image. The abstrction of curve about continuous point is treated successive by diferentiation of first degree of each point. It can be found a traced boundary region by this algorithm. After applied this algorithm, it should be developed to 3D image with sliced 2D image. Because 3D function needs spline interpolation for representation of cubic delineation and reconstruction. In the x-ray the image which is discontinuous fur noise and its characteristic feature, would be applied to find visible boundary and its segmentation line.

儒敎思想이 傳統建築에 미친 影響에 관한 연구 : 朝鮮時代 宗家, 書院을 중심으로

朴載浩,李康宗,權秉俊 三陟大學校 産業科學技術硏究所 2002 産業科學技術硏究論文集 Vol.7 No.2

Root Confucian ideas to spread that principle that contribute all things in universe with human by perfect virtue the nature note and inside be that it be . Human's root had been shy gentle and good temper extremely but have stroma because keep body and because greed for material brings thereby, because it hides good temper or is forgotten, moral culture and education are required. Confucian Treatise of Human Nature gets into theoretical nature of this paradox in Sung Confucianism and by Toegye, Yulgok etc. philosophical by indurate . In Choson period, Sinbunje and formation of powerful family group's same race community form main family naturally and brought qualitative development of private house. Also, lecture-hall developed to place that development of Sung Confucianism learns learning and compose scholars' group. As this dying injunction bore in construction by direct admonition hundred Choson age that Confucian ideas develops.

석회석을 이용한 칼사이트형 탄산칼슘의 제조 및 분산특성 연구

이재장,박종력,김병곤,장광택 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

석회석은 국내 비금속 광물자원의 대부분을 차지하며 강원도와 충북 등의 일부지역에 편재되어 부존하고 있다. 그러나 CaO 함량이 54% 이상인 고품위 석회석은 전체 매장량의 5% 이하로 매우 빈약한 편이다. 더욱이 대분분의 생산량이 1차 산업용으로 사용되어 부가가치가 낮은 용도로 활용되고 있다. 본 연구에서는 이러한 석회석의 부가가치를 향상시키기 위하여 칼사이트형 침강성 탄산칼슘을 탄산화법을 이용하여 합성하고자 하였으며, 합성된 탄산칼슘 분체 및 현탁액의 분산안정성에 대하여 조사하였다. 분산이 양호하고 균일한 입도의 칼사이트 분체를 얻기 위해서는 CaO 농도 3%, CO_2 가스 유입량 300㎖/min, 교반속도 1,000 rpm에서 탄산화반응시 반응온도를 10~30℃로 유지하여야 함을 알 수 있었으며, 현탁액의 분산안정제로 PMAA와 PAA를 첨가제로 사용시 pH 6, 9, 12에서 0.2 wt% 첨가할 때 우수한 분산안정성을 나타내었다. A limestone reserves in korea is comparatively enough and reserved mainly in Kangwon-do and Chungchongbuk-do. However, it is known that limestone of high grade, more than 54% CaO, is about under 5% of total reserves. Besides, most of them are used for manufacture of cement as a primary material of low value. In this study, calcite type calcium carbonate powder or slurry was synthesized by carbonation process using limestone and dispersion properties of the prepared calcium carbonate suspension was investigated. In the carbonation reaction, the temperature of lime milk must be kept 10∼30℃, CaO consentration of 3%, stirring rate of 1,000 rpm and CO_2 gas flow rate 300㎖/min to manufacture stable dispersion calcite. Also, in the result of measuring the precipitation height of calcite suspension at pH 6, 9 and 12 as a function of the PMAA and PAA content, stable dispersion properties was observed at 0.2 wt% of PMAA and PAA. This may be due to the formation of the distinct adsorption layer between calcite particles by dispersant.

국부의치용 금속인 Ni-Cr alloy와 Co-Cr alloy의 주조후 냉각방법에 따른 표면조직과 경도의 비교 연구

김재도,김병식,김주원 대구산업정보대학 2002 논문집 Vol.16 No.-

The purpose of this study was to investigate the relationship between the micro-structure and hardness of Ni-Cr alloy(Talladium™ alloy) and Co-Cr alloy(Wironium^(?) extra-hard alloy), which are widely used as partial denture frame work these days, depending on the cooling method, followed by casting. The frist group was bench cooled at room temperature(20℃), the second group was slowly cooled in the furnace from 700t to room temperature, and third, rapidly cooled in 20~22℃ water. The micro-structures of each specimen were compared by means of photomicrograph taken by metallurgical microscope. In addition to the physical characteristics of each specimen were obtained using the Rockwell C Scale. The results were obtained as follows: 1) The hardness value of Talladium™ alloy appeared higher than the Wironium^(?) alloy. 2) The hardness value of the slow cooling method(in the furnace) appeared higher the than the bench cooling method, water cooling method. 3) The grain particle in the slowly cooled alloy were much finer than the bench cooling method, water cooling method. 4) In the cooling method of Talladium™ alloy and Wironium^(?) alloy for partial denture the slow cooling method was considered more profitable than the bench cooling method, water cooling method.

적외선 감지를 위한 InSb 다이오드의 제조

손병복,이재곤,최시영 경북대학교 센서기술연구소 1992 센서技術學術大會論文集 Vol.3 No.1

CORBA를 기반으로 한 XML 정보검색 시스템 통합 구현

이재완,정병인 군산대학교 정보통신기술연구소 2000 情報通信技術硏究論文集 Vol.4 No.-

The Internet is convenient to use and makes possible to utilize the dispersed information source through single/unity interface so that it provides the most effective computing environment since 1990. But the current web reveals the limitation in data control and expansion due to the unstructured character of the HTML. The XML, the next generation language and developed to overcome the limitation of the current web, can make the data controlled and managed very efficiently. With these advantages the XML is now using broadly in the area of electronic commercial transaction, EDI, medical management system, etc. This paper shows that the development of 3-Tier client/server system with the CORBA basis dispersed object technique. It makes use of the advantages of XML and CORBA, which can make the document data access dynamically.

한국 어린이와 성인의 표준잇솔규격개발에 관한 연구

이원재,이병진,배광학,김영수,노정,문혁수,백대일,김종배 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.4

Purpose of this study was to obtain basic anatomical data for developing optimal toothbrush which is appropriate for Koreans Dental study models were examined by measuring the length from labial midline of deciduous canine to distal surface of deciduous second molar, from labial midline of permanent canine to distal surface of second premolar, from mesial surface permanent first molar to distal surface of permanent second molar, cervico-incisal length of deciduous central incisor, cervico-incisal length of permanent central incisor, from mesiobuccal cusp of deciduous maxillary second molar to mesiolingual cusp of deciduous maxillary second molar, from mesiobuccal cusp of permanent maxillary first molar to mesiolingual cusp of permanent maxillary first molar, from distolinual cusp of deciduous mandibular second molar to mesiolingual cusp of deciduous mandibular second molar, from mesiobuccal cusp of permanent mandibular first molar to mesiolingual cusp of permanent mandiblar second molar in 241 subjects. And the width of right hand was examined on each subjects by measuring the length of landmarks which were selected in handwrist X-ray film. Commercial toothbrushes sold in Korea were collected and the head length, head width, bristle length and handle length of toothbrushes were measured. The obtained results were as follows; 1. The head length of toothbrush which were appropriate for Koreans aged 6 to 8 was less than 21.8 mm. The head width length of toothbrush which were appropriate for Koreans aged 6 to 8 was less than 8.4 mm. The bristle length of toothbrush which were appropriate for Koreans aged 6 to 8 was more than 5.7 mm. The handle length of toothbrush which were appropriate for Koreans aged 6 to 8 was more than 84.3 mm. 2. The head length of toothbrush which were appropriate for Koreans aged 9 to 11 was less than 20.4 mm. The head width length of toothbrush which were appropriate for Koreans aged 9 to 11 was less than 8.4 mm. The bristle length of toothbrush which were appropriate for Koreans aged 9 to 11 was more than 9.3 mm. The handle length of toothbrush which were appropriate for Koreans aged 9 to 11 was more than 95.2 mm. 3. The head length of toothbrush which were appropriate for Koreans aged over 12 was less than 25.5 mm. The head width length of toothbrush which were appropriate for Koreans aged over 12 was less than 8.6 mm. The bristle length of toothbrush which wee appropriate for Koreans aged over 12 was more than 9.6 mm. The handle length of toothbrush which were appropriate for Koreans aged over 12 was more than 101.1 mm. 4. Some toothbrush for children was not appropriate because of its big size, and toothbrush sells in Korea must be diversified for appropriate selection.

모바일로봇 장애물회피 제어

심병균,Nguyen Huu Cong,김준홍,조창제,한성현 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

This paper achieves a research about avoidance of obstacles avoidance based on ultrasonic sensor. The performance of the proposed obstacle avoidance robot controller in order to determine the exact dynamic systems modeling system that uncertainty is difficult for nomadic controlled robot direction angle by ultrasonic sensors throughout controlled performance tests. In additionally, this study is an in different ways than the self-driving simulator in the development of ultrasonic sensors and unmanned remote control techniques used by the self-driving robot controlled driving through an unmanned remote controlled unmanned realize the performance of factory automation.

Methylation이 心筋細胞膜에서의 ATP에 의한 Calcium Transport에 미치는 影響

金柱炳,昔廷鎬,李載欣 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2

For the purpose of studying the properties of calcium pump, the effect of methy lation on the ATP-induced Ca-transport in the isolated porcine sarcolemmal vesicles which were loaded with high KCI was investigated. 1) Ca-transport by ATP was increased significantly, compared to control sarcolemmal vesicles. 2) Ca-transport of the vesicles preincubated in the methylation medium without PM II was increased by ATP, but less than control sarcolemmal vesicles. 3) Ca-transport of the vesicles preincubated in the methylation medium with PM II was decreased by ATP in the KCl medium, but increased in NaCI medium. But Ca-transport by ATP in the methylated vesicles in the reaction medium (NaCI and KC1) was significantly decreased, compared with Ca-transport by ATP in the nonmethylated vesicles. From the above results, it was suggested that methylation of membrane protein by PM II can change the membrane properties or the activity of calcium ATPase transporting calcium.