WIPI 기반 모바일 3D 게임엔진의 설계와 구현

형대진,김승구,조현준,박경환 동아대학교 정보기술연구소 2006 情報技術硏究所論文誌 Vol.14 No.1

In this paper, we introduce the method for developing the mobile 3D game engine based on the WIPI platform which has been proposed as the mobile standard platform. Our game engine is designed so that it supports OpenGL-ES and JSR-184 that are mobile 3D graphic APIs. Our game engine has a mobile emulator operated on PC and SDK to support mobile programming in PC environments. Mobile 3D game developers can use the APIs at various levels. Also, the game engine is developed in modular in order to support various game genres.

다중 네트워크 아키텍처 지원을 위한 객체지향 게임 네트워크 엔진의 설계 및 구현

형대진,이재윤,박경환 동아대학교 정보기술연구소 2007 情報技術硏究所論文誌 Vol.14 No.2

Online game that based on network communication, use various type of communication and network architecture for each character and genre of game. In this paper, we investigated and analyzed communication types used in online games and, based on the results, introduced a method of developing an object-oriented network engine supporting various types of network architecture. The developed network engine not only supports the development of games using various types of communication applicable to online games but also is easily expandable because of its hierarchical structure based on the object-oriented concept. Moreover, since it can support dead reckoning make up for network latency problem, we use very usefully for development of game.

RFID를 활용한 3차원 물류 창고 관리 시스템의 설계 및 구현

형대진,김승구,이재윤,박경환 東亞大學校附設 淸報技術硏究所 2006 情報技術硏究所論文誌 Vol.13 No.2

At present, a business management is managing to minimize a investment or a stock cost for a warehouse. So the essential point of warehouse's function is exchanged to attach greate important to information technology and client services. But the existing warehouse management systems have many weak points in part of information technology and client services. In this paper, we suggest the plan of introducing the RFID system into warehouse management system for an efficient management. We also develop warehouse management system to show in realtime 3D a location information of goods in the warehouse.

RFID를 적용한 항공물류 SCM 시스템의 설계 및 구현

형대진,김승구,이재윤,조현준,박경환 東亞大學校附設 情報技術硏究所 2005 情報技術硏究所論文誌 Vol.13 No.1

The present the information sharing among the subjects was not enough in Airway Logisctics Industry, because each subject use the independent system. The Airway Logistics Network is suggestion, but the Airway Logistics Network dose not operate with efficient connection, because each subject attached to the connection among the internal system. If the RFID system which one of Auto-ID systems is introduce into Airway Logistics, an efficient management of Airway Logistics will be possible. In this Paper, we introduce the RFID system into Airway Logistics SCM system for an efficient management and an efficient information sharing. We also develop Airway Logistics SCM system with priority given to Forwarder which is occupy an important position in Airway Logistics industry.

역공학 기술을 이용한 스크류 유량계 개발 및 성능평가에 관한 연구

김형일,황종대,정윤교 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.2

This research presents a modeling and a manufacturing method of screw flow meter. This paper introduces the efficient design and manufacturing method of screw type flow meter using reverse engineering and test technology. The methods introduced this paper utilize the reverse engineering that is increasing accuracy of modeling and manufacturing of reverse model. And then it can be used in performance test with hydraulic test equipment. Hence this can be used in the basic document for development of the quite accurate flowmeter.

위장질환에 따른 H.pylori 감염빈도와 검사방법의 비교분석

김대현,조재현,금민수,최성곤,이창형,탁원형,권영오,김성국,최용환,정준모 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.2

목적 : H. pylori가 위장관 질환의 병인에 깊은 관련이 있어 이의 적절한 진단 및 치료가 중요하게 대두되고 있다. 이에 저자들은 소화기 증상을 주소로 내원한 환자들을 대상으로 내시경 검사를 실시하여 H. pylori검출을 위한 CLO검사, IgG 항체검사 및 H&E 염색 등을 시행하여 각 질환별로 H. pylori 감염의 양성율을 알아보고 검사법에 따른 민감도 및 특이도를 그 유용성에 대하여 조사하였다. 대상 및 방법 : 1996 4월에서 8월까지 경북대학교병원에 소화기증상을 주소로 내원한 총 313명의 환자를 대상으로 내시경 검사를 실시하여 H. pylori 검출을 위한 CLO 검사, IgG 항체검사, 조직염색 검사를 실시하였다. 결과 : 전체 대상 환자수는 313명이었고 연령별 분포는 16세부터 80세 까지 다양하였으며 그중40대, 50대, 60대가 각각 69예(22%), 73예(23.3%), 65예(20.8%)로 전체 환자중 66%를 차지하였다. 남녀비는 2.07 대 1로 남자가 많았다. 대상환자의 평균나이는 52±15세였고, 전체 대상환자에서 H. pylori 양성군과 음성군의 평균나이는 각각 50±15세, 54±15세 였고, 궤양환자군에서 H. pylori 양성군과 음성군사이의 평균나이는 각각 49±14.8세, 55±13.8세로 나타났다. 각 질환별분포는 위염이 72명(23%), 십이지장 궤양이 85명(27.2%), 위궤양이 80명(25.6%), 위암이 20명(6.4%), 비궤양성 소화불량이 13명(4.2%), 기타가 43명(13.7%)이었으며, H. pylori 감염 양성율은 위염이 71%, 십이지장 궤양이 86.8%, 위궤양이 58.3%, 위암이 75%, 비궤양성 소화불량이 75%였으며 특히 유문륜 궤양에서는 100%의 양성율을 보였다. 소화성 궤양군과 비궤양군에서의 H. pylori 양성율을 비교해 본 결과 궤양군에서는 73.1%, 비궤양군에서는 72%로 통계학적으로 차이는 없었다(P=0.91). 소화성 궤양환자에서 출혈이 동반된 군과 동반되지 않은 군에서의 H. pylori 양성율을 비교해 본 결과 출혈이 동반된 군에서의 양성율은 54.5%였고, 출혈이 동반되지 않은 군에서는 77.5%의 양성율을 보여 출혈이동반되지 않은 군에서 통계학적으로 유의하게 높았다(P=0.014). 나이에 따른 양성율을 알아본 결과 50세 이하에서는 78.5%였고, 50세 이상에서는 67.5%로서 양성율이 낮았으나 통계학적으로 유의성은 없었다(P=0.052). 각 검사법에 따른 민감도 및 특이도는 전체 환자중에서는 CLO검사가 88.9%, 96.1%, IgG항체검사 90.8%, 58.5%, H&E 염색검사 86.9%, 79.2%로서 민감도는 비슷하게 나왔으나 CLO검사는 상대적으로 특이도가 다른 검사법에 비해 높았다. 궤양군에서의 CLO검사의 민감도와 특이도는 92.0%, 95.6%였고, 비궤양군에서의 민감도와 특이도는 84.3%, 96.8%로서 비궤양군에서는 CLO검사의 민감도는 약간 낮았다. 나이에 따른 CLO 검사의 민감도 및 특이도는 50세 이하에서는 91.5%, 93.1% 였고, 50세 이상에서는 86.3%, 97.9%로서 50세 이상에서는 상대적으로 CLO검사의 민감도가 낮았다. 결론 : 본 연구에서는 위장질환에 따른 H. pylori 양성율을 알아보았는데, 다른 보고에서 처럼 높게 나왔으며, 진단 방법으로 사용한 CLO검사, IgG항체 검사, 조직염색검사 등은 모두 비교적 높은 예민도를 나타냈고, 그중 CLO검사가 간편하고 경제적이라는 면에서 임상적으로 유용한 검사로 여겨지나 상대적으로 CLO검사의 민감도가 낮은 비궤양성 질환과 50세 이상의 환자군에서는 CLO검사 외에 다른 검사방법을 병행함으로써 H. pylori의 진단율을 높일 수 있을 것으로 사료된다. Background: Gastric colonization by Helicobacter. pylori is common among patients with peptic ulcer and gastritis. And various diagnostic tests are available in confirming H. pylori infection. The aim of this paper is to estimate the prevalence of H. pylori infection in Gastroduodenal disorders and compare the sensitivity and specificity of the most widely available tests. Methods: A total of 313 patients were tested for H. pylori infection by IgG Ab, CLO test and H&E stains. Results: The prevalence of H. pylori infection was significantly higher in duodenal ulcer(86.8%) than in gastric cancer(75%), gastritis(71%) and gastric ulcer(58.3%)(P=0.009). The sensitivity and specificity of each test was as follows: CLO test(88.9%, 96.1%), IgG Ab test(90.8%, 58.5%), H&E stain(86.9%, 79.2%). Sensitivity of CLO test in peptic group was 92.0%, whereas in non-peptic group, it was 86.3%. Sensitivity of CLO test in age under 50 was 91.5%, that over 50 it was 86.3%. Conculsions: There is a strong association between H. pylori and gastrointestinal disorders. CLO tests have relatively high sensitivity and specificity, especially in peptic group and younger age(below 50 yr)group. But in those patients in which CLO tests are less sensitive (age>50 or non-peptic group), more than one test may be necessary to diagnose the presence of the organism.

사설시조에 나타난 시·공간 표상의 양상

이형대 한국시가학회 2002 韓國 詩歌硏究 Vol.12 No.-

Space is related with the condition of life. Time is related with the process of life. which is the form of revealing life. In this respect, space and time are closely related with each other. This paper aims at elucidating aspects of spatiotemporal representations reflected in the dimension of experience and imagination, particularly in the difference of dwelling environments which form primitive experiences in poetics. The spatiotemporal representions in Saseolsijo(a form of Sijo(Korean ode) with unlimited length in the middle verse) incorporating experiential lyricism in rural life are not only circular and sequential, but also showing limit of closed life-world. That may be primarily because space and time are represented in close connection with the lives of people who had lived in such environments. On the contrary, spatiotemporal experiences in city life are intermittent, segmental and floating. These characteristics may be mostly caused by the facts that in the city goods are produced and consumed without any connection with the natural law of seasons and people maintain life pattern on the basis of the law of competition. Separation between working place and home and that between working time and leisure time are the marked indications. So, I argue that the sentimental aspects in city life were reflected or, reversely injected in the often occurred scenes like 'spots of amusement' and 'lapses of the moment' in Saseolsijos. In an extreme of spatiotemporal consciousness are expressed hallucinatory spatiotemporal representations. In them, the sequentiality of space and time disappears and a new semantic term gets formed. This formation depends on the writer's will and it can be variedly transformed by her. So, I conclude that it is similar to productions of romantic imagination.

한국산 뱀독이 개구리 심실근육세포의 수축력과 활동전압에 미치는 영향

한형일,방효원,엄대용,이상돈 중앙대학교 의과대학 의과학연구소 1984 中央醫大誌 Vol.9 No.3

In order to observe the effects of freeze-dried saliva of Agkistrodon caliginosus and Agkistrodon saxatilis, the Korean poisonous snakes, on the contractility and action potential of frog ventricular muscle cells, the isometric tension in a vertical chamber and the action potential in horizontal chamber were recorded and analyzed. The following results were obtained; 1. ED_50, to reduce the contractility was 4-8ug/ml in the case of A. saxatilis and 8-16ug/ml in the case of A. caliginosus which all were higher than that of A. brevicaudus and the inhibitory effect on the contractility was greater in the case of A. saxatilis than that of A. caliginosus. 2. In the case of A. saxatilis, APD_50(time to repolarize 50% of action potential amplitude) decreased from 820±80 ms to 710±60 ms, the overshoot and the V max(Maximum depolarization rate) decreased from 34±8 mV to 18±4 mV, from 98±8 V/s to 89±4 V/s respectively. 3. In the case of A. caliginosus, ADP_50 decreased from 880±70 ms to 720±40 ms, the overshoot and the V max decreased from 28±6 mV to 20±4 mV, from 89±8V/s to 77±12V/s, respectively. 4. Inhibition of contractility and overshoot potential were more prominent in A. saxatilis and APD_50 was more decreased in A. caliginosus. The above result showed that Korean snake venoms would decrease the ionic current underlying the rapid upstroke phase and slow inward currents by calcium ions simultaneously in a frog ventricular muscle cells.

유기농업에 있어서 부숙된 가축분뇨의 연속시비가 토마토 생산 및 토양중 양분함량에 미치는 영향

구자형,전대우 忠南大學校 環境問題硏究所 2001 環境硏究 Vol.19 No.-

농가에서 실시되고 있는 유기농업의 문제점을 파악하기 위하여 2년 동안 플라스틱 하우스 내에서 돈분 및 돈분과 계분을 혼합한 유기물을 30, 60, 120ton·ha^-1씩 시비하고 관행재배(화학비료시비)와 생육상태 및 수량을 비교하고 토양분석을 통하여 무기성분의 변화상태를 조사하였다. 1. 토마토 초장은 화학비료 시비구와 부숙퇴비 시비간에 차이가 적었으나 엽록소 함량의 감소는 부숙퇴비 처리구에 화학비료 시비구에 비해 더 빠른 것으로 나타났다. 1년차재배포장에서 2년 연속재배 포장에 비하여 생육초기의 초장이 더 큰 결과를 보였으나 엽록소 감소폭은 두 포장간에 차이를 보이지 않았다. 2. 1년 재배 포장에서는 화학비료시비에 비하여 30-60ton·ha^-1의 부숙퇴비의 시비에서는 수량이 적었으나 120ton·ha^-1의 시비에서는 많은 수량을 보였다. 유기농 재배를 2년 연속 실시한 포장에서 처음 시작하는 1년차 재배포장에 비하여 대체적으로 수량이 10%이상 증가하는 경향을 보였다. 돈분단용 또는 돈분과 계분의 혼합시비에 따른 수량의 차이는 보이지 않았다. 3. 토양중 유기물 함량은 부숙퇴비의 시비량이 많아질수록 높았으며 120ton·ha^-1이 2년연속 처리되었을 경우 9% 정도에 도달하였다. 토양내 질산태 및 암모니아태 질소 함량은 1년차 재배포장에 비하여 2년 연속재배 포장에서 더 일찍 소실되었으며, 인의 함량은 두 포장간에 비슷하였고 계분이 함유된 퇴비의 시비에서 많은 함량을 보였다. 칼륨은 2년 연속재배 포장에서 많은 량이 검출되었고 대체적으로 감소폭도 완만하였다. 4. 칼슘과 마그네슘의 함량은 년차별 재배포장간에 차이가 없었고 pH와 EC도 별다른 차이를 보이지 않았다. 그러나 시비량이 많아질수록 EC가 높아지는 경향을 보였고 120ton·ha^-1의 부숙퇴비 시비에는 2-2.5mS·cm^-1이상의 높은 수준을 보였다. To improve the present organic farming practices in Korea, experiments for successive years in the plastic house were performed to compare the effects of composted swine manure alone, swine and fowl manure mixture with treatments of 30, 60, 120 tonㆍha_-1, and conventional farming practices on growth and yield in tomatoes. The contents of organic matter and mineral in soil were also studied throurgh a chemical analysis. Although little difference of plant height was found between chemical fertilizer and composted animal manure treatments, chlorophyll contents of plants were rapidly reduced in composted manure treatment. Between composted manure treatments in terms of 1 yr cropping field and 2 yrs cropping field, plant height at the early stage of growth was higher in the former field but there was no difference in chlorophyll loss. The total yields per plant of 1 yr cropping field with 30-60 tonㆍha_-1 of composted manure treatment were lower than that of chemical fertilizer treatment but not in the field of 120 tonㆍha_-1. There was a yield increase of more than 10% in 2 yrs cropping field of composted animal manure application than that of 1 yr cropping field but no clear difference was found between sources of manures. Organic matter contents of sojil were increased up to approximately 9% in 2 yrs cropping field applied with 120 tonㆍha_-1 of composted manures. Nitrogen contents of nitrate and ammonium types were rapidly decreased in 2 yrs cropping field than in 1 yr cropping ones. Even though the levels of phosphorous content were similar between cropping years, there was a tendency of higher phosphorous levels in the field applied with fowl manure in general. Potassium content was higher in 2 yrs cropping field and remained relatively at constant level during cultivation. No clear differences were found in contents of calcium and magnesium, pH and electrical conductivity (EC) regardless of cropping years. However, the level of EC was increased along with the increase of application amount of composted manures and that was ranged from 2.0 to 2.5 mSㆍ㎝_-1 in the field applied with 120 tonㆍha_-1.

항 Vancomycin 내성균성 항생물질을 생산하는 Streptomyces sp.AMLK-335의 배양조건

이기형,임대석,최경희,이경호,김창한,김정환 건국대학교 동물자원연구센터 2000 動物資源硏究誌 Vol.21 No.-

본 연구는 새로운 항 vancomycin 내성균성 항생물질을 개발하기 위하여 실시되었으며, 전국 각지의 토양 시료로부터 분리한 방선균 중 vancomycin 내성균주인 K-98 Enterococcus faecium 642, K-98 Enterococcus faecium 637 균주에 대하여 항생물질을 생산하는 분리균주 AMLK-335를 선정하여 이 균주의 항생물질 생산에 대한 최적 발효 조건을 검토한 결과, 탄소원 첨가로는 glycerol(0.5%), 질소원 첨가로는 yeast extract(0.5%)가 가장 효과적으로 항생물질 생산에 이용되었고, 비타민을 첨가에 따른 항생물질 생산성의 차이는 크게 나타나지 않았으나, calcium pantothenate 첨가시 항균활성이 비교적 높아졌으며, 금속이온의 첨가는 K+, Pb+, Ba²+, NA²+ , Ca²+를 첨가하였을 때는 항생물질의 생산성이 비교적 높아졌으며, 그중 Ca²+ 첨가구가 가장 생산성이 높았으며, Fe²+ , Hg+의 금속이온을 첨가하였을 때는 항생물질 생산성이 감소하였으며, CaCO₃첨가는 비첨가구보다 높은 항생물질 생산성을 보였으나, 첨가량에 따른 영향은 대체적으로 없었다. pH의 변화에 따른 생산성은 전반적으로 pH가 항생 물질 생산에 영향을 미치지 못하였으나, pH 4.5∼6.0 부근에서는 비교적 높은 항생물질 생산성을보였으며, 통기량에 따른 항생물질 생산성은 통기량이 많을수록 항생물질 생산이 좋았다. 한편 배양기간에 따라 항생물질 생산성을 조사한 결과, 5일째에 가장 높은 항생물질 생산성을 나타내었으며, pH의 변화는 배양 초기에 하강하였다가 점차 상승하는 경향을 보였다. This study was carried out for examining antibiotic productivity of the strain Streptomyces sp. AMLK-335 producing anti-VRE antibiotic. According to different condition, the strain was cultured for 4 days at 27℃ and determined cell growth, pH value and antibiotic productivity using disk diffusion method. In the experiment, the strain Streptomyces sp. AMLK-335 was examined various culture conditions which was added 8 carbon sources, 12 nitrogen sources, 8 vitamins and 11 metal ions in each time and controlled concentration of CaCO₃, initial pH and aeration. From the studies of conditions for antibiotic production, antibiotic productivity was the best to use 0.5% glycerol as carbon source and 0.5% yeast extract as nitrogen source. When several vitamins were added to medium, there was little difference in antibiotic productivity. But the addition of calcium pantothenate slightly increased antimicrobial activity. The addition of metal ion, such as K+, Pb+, Ba²+, NA²+ and Ca²+ slightly increased antibiotic productivity except Fe²+ and Hg+. The addition of CaCo₃showed higher than non-addition experiment in antibiotic production, but there wasn't generally influenced at addition concentration. According to pH change, antibiotic productivity was increased at pH 4.5∼6.0, and when there was a lot of aeration, antibiotic productivity was increased.