한국 고대의 해양문화와 이사부

윤재운,장희흥 대구대학교 2008 敎育硏究 Vol.4 No.1

Korea is deep tradition of ocean culture because the three dimensions of it is enclosed by sea. But the value of ocean culture fall, because we take no interest in ocean. Besides industrialization and urbanization of islands and the coast is carried out, the tradition of ocean culture go out of sight. Luckily recognition about sea is changed recently. However it is limited to Yellow Sea and South Sea, interest about East Sea is insufficient. For succeed to tradition of ocean culture and presentation of vision about 21th ocean strong power, we need vision about East Sea. This article study Siljikkook, activity of Yi Sa Boo and connection of Silla & Balhae focusing on ocean exchange or trade. This contents present role model of Gangwon province in economic exchange.

건축물 고형시료 중 석면 분석을 위한 방해 물질 제거방법에 대한 연구

김윤재,임지현,장봉기 순천향대학교 기초과학연구소 2021 순천향자연과학연구 논문집 Vol.27 No.1.2

In this study the following pretreatment methods are proposed using solid samples of buildings : furnace ashing methods according to the existing waste process, acid treatment after furnace ashing, acid treatment using graphite block acid circulation, a new method of attempting. This study propose a method for pretreatment of solid samples in buildings containing asbestos with a comparison of the asbestos analysis obstruction removal rates according to the above mentioned methods. The materials used in this study are 48 slates of 3 types and 48 textures of 3 types, total 96 samples which are solid samples in buildings. Pretreatment and acid treatment methods were classified in four ways: Electric high temperature furnace ashing methods according to the existing waste process and acid treatment with HCl(1+3)(Group A), Electric high temperature furnace ashing methods and acid treatment with aqua regia(HCl 3 : HNO3 1)(Group B), acid treatment with aqua regia(Group C) using graphite block acid circulation, a new method of attempting and acid treatment with inverse aqua regia(Group D). The removal rate of furnace ashing from slate samples in A and B treatment groups was 13.91%, and the removal rate of furnace ashing from texture samples in A and B treatment groups was 9.21%, so the removal rate of furnace ashing from slate samples was significantly higher than texture samples(p<0.001). The removal rate of asbestos analysis interfering substances from slate samples and texture samples in C treatment group with acid treatment with aqua regia using graphite block acid circulation were 30.50% and 30.58%, respectively. So in both slates and texture samples, the removal rate of asbestos analysis interfering substances from the slates and texture samples of A, B, and D treatment groups was significantly higher(p<0.001). The newly proposed acid treatment with aqua regia using graphite block acid circulation method in this study significantly eliminated more acid solubility material and asbestos analysis interfering substances than electric high temperature furnace ashing methods according to the existing waste process and acid treatment with HCl(1+3), and this method does not go through the process with high temperature furnace ashing, it is believed that asbestos analysis can be made easier by preventing changes in the characteristics of asbestos and the use of graphite block acid collection devices when acid treatment of solid samples in buildings containing large amounts of asbestos analysis interfering substances can be more effective than conventional methods.

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.

IMT-2000 기지국용 이중 편파를 위한 광대역 단일 소자 안테나 설계 및 특성 개선

장원호,박주성,태재훈,이윤현 한국항행학회 2002 韓國航行學會論文誌 Vol.6 No.3

본 논문에서는 편파 다이버시티 특성을 갖는 이중 편파(Dual-Polarization)방식의 INT-2000(1.885㎓-2.17㎓)기기국용 안테나에 사용할 수 있도록 기존 Folded Dipole안테나의 특성을 개선하였다. 제작된 안테나는 PCB기판에 몰디드 다이폴 안테나 구조에 적층 형태를 갖는 마이크로 스트립 안테나로서 각 단자별 반사게수가 -20㏈ 이하, 이중 편파 구조에서 중요한 규격인 단자간 분리도는 -20㏈ 를 가지며, 이들은 전 대역에서 약 7 dBi 이상의 특성을 보였다. Design and characteristic improvement of existing folded dipole antenna is presented to adopt W-CDMA(1.885~2.170 ㎓) wideband antenna radiators. The antenna structure has +/- 45 degrees dual polarization. In order to overcome the narrow bandwidth and low gain characteristic typical of the microstrip antenna, double layered structure was employed. The antenna achieved below -20 ㏈ reflection coefficients each ports. -20 ㏈ of port isolation, above 7 dBi of gain, providing evidence that the proposed design can be used in the W-CDMA service frequency band antenna.

만성 신부전 환자에서 혈액투석에 의한 Isoniazid의 제거

신재국,차인준,장인진,신상구,김윤구,한진석,김성권 大韓臨床藥理學會 1994 臨床藥理學會誌 Vol.2 No.2

위성방송 수신을 위한 대수주기 마이크로스트립 안테나에 대한 연구

장원호,진재선,이윤현 한국항행학회 2003 韓國航行學會論文誌 Vol.7 No.2

본 연구에서는 이동하면서 BS/CS 대역의 무궁화 3호 위성 신호를 수신할 수 있도록 42도 이상의 틸팅각을 갖는 새로운 구조의 패치안테나에 대해 제시하였다. 본 안테나의 구조는 패치 다이폴을 직렬 배열한 대수 주기형 안테나와 개구결합을 이용한 급전 구조로 이루어 졌다. 테이퍼드 슬롯에 8개의 직렬 패치 다이폴이 수직으로 놓여짐으로써 각 패치 다이폴에 직렬 급전이 된다. 직렬 급전된 패치 다이폴의 방사는 BS/CS 대역에서 메인 빔의 방향이 73? ~ 42?를 형성하였고, 이득은 9.31~11.03 dBi로 측정되었다. 32개의 엘레멘트를 4×8로 적절히 배열하면 24 dBi이상의 이득과 40-48도 내외의 앙각이 형성되어, 무궁화 3호 위성의 이동체 탑재용 안테나에 적용이 가능하다. In this study, we provide a single element log-periodic antenna that the feeding networks and array structures are aperture coupled and series dipole array type. We made the antenna for direct receiving the Moogoongwha satellite broadcasting signal. The transmission power was able to feed the patch dipole in series due to lay perpendicularly 8 series patch dipole on tapered slot. The patch dipole radiation pattern which fed in series power, make the main beam direction up 37°~42° within the BS/CS bandwidth. The main beam gain was measured 9.31~11.03 dBi. Using 32 elements to array the elements properly, we acquire 4×8 array structure on limited PCB board. As a result, it has been found that the new planar DBS antenna structure have high gain over 10dBi and acceptable elevation angle over 42 degree, and we can apply this result to commercial DBS reception antenna manufacturing.

화상 대화 시스템의 객체지향 설계

장재명,김윤호,이정환 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-

This paper presents an object-oriented design for a video conversation system. This paper adapts the traditional client/server architecture and uses JMF for process media transmission. It starts from the analysis of functional/non-functional requirements and it documents the model of the system based on'4+1 View Model.' The manifest in this paper will be used usefully to design a system for cyber university or visual conference based audio/video media transmission.

Ionized Calcium 과 Chitosan 정제의 안정성에 관한 연구

장윤정,김현주,김영일,양재헌 又石大學校 1998 論文集 Vol.20 No.-

Recently, chitosan has being fiocused on not only the role of a potential and natural resource with antibacterial or antifungal effect but also the natural controller of releasing of drugs or principle actives. Calcium is one of the most important minerals of human that concerned with the intra-or inter-cellular function. But ionized calcium, prepared from shell through the condition of high temperature, own the antibacterial effects. We prepared the mixed tablet of chitosan and ionized calcium with several additives such as starch paste, ethylcellulose(EC), hydroxypropylmethylcelullose(HPMC) or hydroxyprophylcellulose(HPC). Each formulation with a additive was adopted as a challenger to modify of release profiles of calcium. Finally following both cationic properties, chitosan & ionized calcium, the mucoadhesive effects in the oral cavity are favorable to introduce for chewable tablet. The similar patterns of contents of calcium, disintegration time, hardness, weigth variation were showed following the preparation with each additive. The dissolution profiles of starch paste preparation was more slower than other preparations. It was as the order as HPMC, HPC, EC. The stabilities of tablet of each formulation was creditable in the period of 4 weeks under the condition of 50℃ and 75% of humidity. The contents of calcium, disintegration time, hardness were not changed significantly. Ionized calcium and chitosan mixed tablet may increase the antibacterial effects and the release patterns of calcium could changed successfully by several addives.

β-Difluoro-α-trimethylsilyl-γ-lactam 유도체의 합성

채규윤,곽경철,문재정,최장호 圓光大學校 基礎自然科學硏究所 2000 基礎科學硏究誌 Vol.18 No.1

α-위치만 선택적으로 difluoromethylene기가 도입된 α.α-difluoro-γ-trimethylsilyl-γ-lactam 유도체(6)들은 ethyl α.α-difluoro-γ-trimethylsilyl-γ-iodopentanoate(4)는 일차아민 유도체와의 반응으로부터 비교적 편리한 작용조건과 비교적 좋은 수득률로 합성하였다. The target of α.α-difluoro-γ-trimethylsilyl-γ-lactam derivatives(6) with selectively in corporated difluoromethylene on α-position were readily prepared form reaction ethyl α.α-difluoro-γ-trimethylsilyl-γ-iodopentanoate(4) and primary derivatives in moderate yields.

부하분산 및 결함허용을 제공하는 CORBA 기반 원격 회의 시스템 설계

성재철,임주혁,장우혁,조찬윤,최항묵 인제대학교 1999 仁濟論叢 Vol.15 No.1

인터넷 및 통신 기술의 발달에 따라 원격 회의 시스템이나 원격 교육, 가상 대학과 같은 응용에 대한 연구가 활발히 진행되고 있다. 이와 판은 시스템에 기존의 중앙 집중 방식을 사용할 경우에는 서버측의 부하가 모두 집중되어 전체 시스템에 영향을 미치게 될 수 있으므로 분산 시스템을 이용한 연구가 활발히 진행되고 있다. 본 논문에서는 이미지나 텍스트-파일과 같은 자료를 필요로 하는 원격 회의 시스템을 설계하고 Factory 객체와 관계형 통합 데이터 베이스를 이용하여 동적 부하 분산과 동적 결함 허용을 제공하는 시스템을 제안한다. As the technigues of the Interned and Communication are developed, the study about its applications such as Remote Conference system, Remote Education and Cyber University are lively progressing. When the centralized method is applied to those kinds of system mentioned above, the load is mostly occurred in the server side anaitcauas bad effect to the whole system. So the Study about an application such as Remote Conference system, Remote Education and Cyber University is considering using the distributed system. In this paper I would like design a Remote Conference System is soogetled, which needs sub data like images, text files and givers dynamic load balance and dynamic fault tolerance using Factory object and Relational Integrated Data Base.