관상동맥경화증 환자에서 전곡섭취가 지질과산화 및 혈중 인슐린과 호모씨스테인 농도에 미치는 영향

장양수,이종호,엄영람,조은영,바현영,황재관,여익현 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.6

韓國人의 各 臟器組織中 靑酸鹽의 微量分布에 關한 硏究(Ⅱ)

張成吉,金恩浩,金英雲,李鎭勳,柳在薰,權五星,金明德,吳世珍,金由那 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

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.

요추부 척추협착증 수술환자에서 극돌기간 연성고정물 사용군과 비사용군의 치료결과 비교

김재도,장재호 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.1

Background : To compare of the clinical and radiologic results between microscopic decompression(MD) and MD with Device for Intervertebral Assisted Motion(DIAM) in lumbar canal stenosis. Materials and Methods : The retrospective evaluation was performed after surgery of stenosis. MD with DIAM was performed in 17 cases(Group A) and MD in 20 cases(Group B). In radiologic evaluation, checked the preoperative and postoperative disc height, intervertebral foraminal dimension, lumbar lordotic angle and instability by Panjabi. In clinical evaluation, preoperative and postoperative pain was checked by VAS. Disability was checked by RMQ(Roland Morris Questionnaire) and sf-36(PF). Results : In radiologic results, disc height changed from 11mm to 13mm in Group A(11mm to 11.8mm in Group B)(p=0.669). Intervertebral foraminal dimension was changed from 20.6mm to 22.3mm in Group A(19.5mm to 20.5mm in Group B)(p=0.536). Lumbar lordotic angle was changed from 15.40 to 14.20 in Group A(14.80 to 19.50 in Group B)(p=0.033). Instability score was improved from 0.9 to 0.2 in Group A(1 to 0.2 in Group B)(p=0.642). VAS score improved in group A from 10 to 2(9 to 2 in Group B)(p=0.612). On sf-36(PF), the values changed from 34/100 to 58/100 in Group A(30/100 to 58/100 in Group B)(p=0.535). Conclusion : Using dynamic interspinous stabilizer(DIAM) appears to be a useful and effective methods in surgery of lumbar canal stenosis with better radiologic results than MD only, but lumbar lordotic angle was decreased, slightly

지식 기반 교육컨테츠 저작시스템

장재경,김호성 한국컴퓨터교육학회 2004 컴퓨터교육학회 논문지 Vol.7 No.2

e-Learning에서 교수-학습자들 간에 형성되는 지식들을 체계적으로 관리하여 효과적인 교수-학습을 수행할 목적으로 교수자들이 교수 설계 이론에 따른 다양한 강의들에 교육 컨텐츠를 보다 쉽게 저작할 수 있는 시스템을 개발하였다. SCORM 표준에 따라 학습객체 간 관계를 설정하여 저작된 컨텐츠는 학습자가 학습내용을 개념화하는데 도움을 줄 것이다. 시맨틱 웹의 RDF를 적용하여 학습객체 간의 관계를 설정함으로써 지식맵을 구성하였고, 교수자가 해당 분야에서 사용되는 단어를 등록하여 일종의 어휘사전을 만들 수 있는 온톨로지를 도입하였다. 학습자의 이해도와 성취도를 고려한 개별학습을 제공하기 위하여 도입된 상호작용점을 따라 학습자마다 개별적인 학습맵이 구성되어 학생 개인의 학습활동과 이해도를 평가할 수 있다. For the purpose of an effective instruction-learning process by systematic management of knowledge between instructor and learner in e-Learning, we have developed the authoring system in which the instructor is able to author easily on various lecture frames according to the instructional design theory. The authored contents with the relations among the learning objects based on SCORM standard would help learner to conceptualize the contents. A knowledge map is constructed on the relations among the learning objects using RDF of the semantic web. We introduce the ontology in which the instructor can make a dictionary of terminology by registering the words of the teaching area. The learning activity and comprehension of students can be assessed using each student's learning map along the interaction points which are introduced to present the individual learning by considering each student's capacity of understanding and achievement.

시멘트 종류별 콘크리트의 적산온도에 의한 강도예측에 관한 연구

장종호,나철성,김재환,김용로,길배수,남재현,김무한 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

The purpose of this study is to exhibit fundamental data which can apply to quality and process management of structure concrete using special cement in the construction field investigating strength prediction by maturity method of concrete according to cement types. The activation energy value was derived from the experimental study that experimental factors were selected as W/C ratio of 45%, the kinds of cements of 3 levels of O.P.C, H.B.C, H.S.C and curing temperature of 3 levels of 5℃, 20℃, 35℃. Also, after investigating relationship between compression strength and equivalent ages of concrete according to cement types, the strength prediction was investigated by maturity method. As the above of results, differences between the prediction strength by strength prediction equation and the actual measurement strength were lower, therefore it is considered that the strength prediction by maturity method is possible not only concrete using normal portland cement but also concrete using special cement.

알코올 발효성 야생 효모의 선발 및 발효특성

장재호*, 한상민*, 이종수 배재대학교 자연과학연구소 2017 自然科學論文集 Vol.28 No.1

충남 예당 저수지부근 토양에서 분리한 야생효모 중 Aureobasidium pullulans 효모가 가장 발효능이 우수하여 최종 선발하였다. 20% 포도당을 함유한 YPD 배지에서 Aureobasidium pullulans의 발효 최적 조건을 조사한 결과 에탄올 함량은 25℃에서 7일 발효시켰을 때 가장 많은 12.6 v/v%의 에탄올을 생성하였다. In order to select alcohol-fermenting wild yeast, among thirteen strains of non-pathogenic wild yeasts from Yedang Reservior, Chungnam province, Korea, Aureobasidium pullulans P-1 was screened as a potent alcohol-fermenting yeast. Optimal ethanol fermentation condition was investigated using 20% glucose- 1% yeast extract-2% peptone(20 DYP) broth. Maximal 12.6 v/v% ethanol was produced when 20% DYP broth was fermented by 5% Aureobasidium pullulans P-1 culture broth at 25℃ for 7 days.

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.

R.F. magnetron sputtering법으로 제조한 LaCoO₃박막의 가스감지 특성

장재영,신정호,김정규,박기철,전춘배 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

LaCoO_(3)(LCO) thin film sensors were fabricated on an alumina substrate by the r.f. magnetron sputtering. By varying the annealing temperature of the LCO films from 600℃ to 1000℃, we investigated X-ray diffraction pattern, electrical properties, and gas sensing properties of the films. The crystallinity was improved and the activation energy was increased with increasing the annealing temperature. The sensitivity of the LCO films for NH_(3) and CO gases was also increased with the annealing temperature. Sensing properties of LCO thin films were improved when the measuring temperature was 350℃ or more.

천연염료를 이용한 무늬염법

장영호,이재범 한국공예학회 1999 조형디자인연구 Vol.2 No.2

The natural dye substance largely consists of plant, animal and minerals materials, which we can easily and naturally be obtained all around us. It has been widely used all around the world for numerous years. The natural dye substance appears to have a lot of benefits that enable the dyed material to show natural merits which in turn enables the dyed materials to exhibit their natural colors. It may have a little bit of a damaging effect on the human body itself. , in comparison to the synthetic substances. It also causes hardly any environmental pollution because of the natural chemicals and costs much less to dispose of. on the other hand it also has disadvantages, that is it's difficult to get various kinds of patterns on the cloth. The dyeing process is done by full saturation, which is only available for commercial use because of the low ratio of dyeing success. The product of the dye substance is limited, the reliability of the dyed material is low, and it is easy to make dark and light colors. For the reasons mentioned above, the use of the natural dye is decreasing except for special uses. Nowadays it is very difficult to come across this method because of he appearance of synthetic dye substances. The dyeing process by saturation into the natural dye substance is done by putting the material, ready for dyeing, into the dye-water once or several times repeatedly. It also has several problems, which include, the complexity of the dyeing process, the low reliability of the dyeing substance and the dependence on manual work done by observing with the naked eye. Eventually, these problems caused the slow down of industrialization. Furthermore, the mixed use of dye substances and it's catalyst caused to develop the natural dye substance and to increase the dye's adhesiveness to the material. Those are the disadvantages of it's use. This is the method to study silk screen printing by using natural dye substance to make a specific patterns on the clothing using various methods. The silk screen printing needs to have the material dyed by the saturation method. Then the silk screen is printed by subtracting the colors to make another shade of color without using any additional dye substance. It only uses the natural dye substance mixture and it's catalyst. It will help to print specific patterns on the material. Therefore it's effects are available for using in various kinds of silk screen printing and to make different kinds of patterns equal to the natural dye substance method, which is both saturating and then printing.