삼기층(三紀層) 퇴적암(堆積岩) 중(中) 비석(沸石)의 산출상태(産出狀態)

김종환,문희수,Kim, Jong-hwan,Moon, Hee-Soo 대한자원환경지질학회 1978 자원환경지질 Vol.11 No.2

Of more than 30 varieties of zeolite group minerals, 7 varieties, mordenite, clinoptilolite, natrolite laumontite, stilbite, stellerite and chabazite are identified in Korea, whereas mordenite and clinoptilolite occur in Miocene sediments of small Yonil tertiary basin, east coast of Korea. The basin consists of three separate groups of sediments called Janggi, Gampo and Haseo, which are not correlated stratigraphyically yet. Zeolite occurs alternating with montmorillonite layers in Nuldaeri, Yongdongri and Haseori tuffs of Jahanggi, Gampo and Haseo Groups respectively. Zeolite was formed by diagenesis. of acidic volcanic tuffs.

의정부시 주택 현황에 관한 연구

김종환,Kim, Jong-Whan 한국디지털건축·인테리어학회 2004 한국디지털건축인테리어학회 논문집 Vol.4 No.2

This study is to furnish basic data for establishing the improvement counterplan of Housing environment and to solve the problem of Housing supply resulting from the continuous increase of population and to examine the historical flowing, the present condition and problems of Housing in Uijeongbu city. Including of the multi-house to the number of Housing, the supply ratio of Housing is 95% in quantity of the Housing in Uijeongbu city in 2004. Now, it is important time in the respect of quality as well as the quantity in supply matter of Housing. In fact, the main viewpoint in housing supply policy has been brought focus into the economic profits more than public interests. As a result of that, the residence environment has been worse. From now on, a Local autonomous entity including the construction authorities and Uijeongbu city authorities must focus on the public interests in solving problems of Housing.

영상정보에 기초한 전차 자율탐지 및 조준점탐색 연구

김종환,정치정,허미라,Kim, Jong-Hwan,Jung, Chi-Jung,Heo, Mira 한국시뮬레이션학회 2018 한국시뮬레이션학회 논문지 Vol.27 No.2

본 논문은 지상무인전투체계 중의 하나인 무인경전투차량이 RGB 영상정보를 기초로 스스로 전차를 탐지하고 조준점을 산출하는 지능형 표적획득/처리기술의 기초연구이다. 무인 경전투 차량이 전장에서 적 전차와 조우 시, 적 전차를 자율적으로 탐지하고 스스로 조준하는 방법을 개발하기 위해, 영상정보로부터 전차의 주요특징을 식별 및 추출하고, Maximally stable extremal regions, 중간값 필터, k평균 클러스터링 그리고 Morphological filtering의 영상처리기법 및 인공지능 알고리즘을 통해 전차의 외형정보를 추출 및 분석하였으며, 식별된 전차 외형정보를 벡터화하여 전차의 중앙을 지향하는 조준점을 산출하였다. 또한, 본 연구의 성능을 측정하기 위해 선진국들의 주력전차의 영상정보를 수집 및 분석하였고, 제안한 방법의 객관적인 전차탐지 성능은 정확도 91.6%, 정밀도 90.4%, 재현율 85.8% 그리고 F-measure 88.1%의 결과를 보여주었다. 본 연구가 무인전투체계의 지능형 표적획득/처리기술 연구개발에 도움이 되기를 기대한다. This paper presents an autonomous detection and aiming point computation of a battle tank by using RGB images. Maximally stable extremal regions algorithm was implemented to find features of the tank, which are matched with images extracted from streaming video to figure out the region of interest where the tank is present. The median filter was applied to remove noises in the region of interest and decrease camouflage effects of the tank. For the tank segmentation, k-mean clustering was used to autonomously distinguish the tank from its background. Also, both erosion and dilation algorithms of morphology techniques were applied to extract the tank shape without noises and generate the binary image with 1 for the tank and 0 for the background. After that, Sobel's edge detection was used to measure the outline of the tank by which the aiming point at the center of the tank was calculated. For performance measurement, accuracy, precision, recall, and F-measure were analyzed by confusion matrix, resulting in 91.6%, 90.4%, 85.8%, and 88.1%, respectively.

SVM 기반 소화기 방호한계속도 측정방법 연구

김종환,백승원,윤병조,조성식,Kim, Jong-Hwan,Baik, Seungwon,Yoon, Byengjo,Jo, Sungsik 한국군사과학기술학회 2016 한국군사과학기술학회지 Vol.19 No.5

This paper presents a ballistic limit velocity measurement using the support vector machine that classifies two classes, the partial penetration and the complete penetration, by generating a linear separating hyperplane that equally divides the classes. For the ballistic limit velocity measurement, the previous methods(MIL-STD-662F and NIJ-STD-0101.06) have required a large number of experiments that caused high cost and time. However, the proposed method is not only flexible, requiring 0.85 ~ 4.8 times fewer experiments but also reliable, providing less than 2 % difference in results compared to the previous methods. For its validation, live fire experiments were conducted using various thickness SS400 iron plates as a target and two different types of live bullets such as 5.56 mm M193 and 7.62 mm M80.

Porous Resorbable Calcium Carbonate와 Porous Replamireform Hydroxyapatite가 성견치주질환 이환 발치와내 이식된 치근과 발치와 치조골 재생에 미치는 영향

김종환,최성호,Kim, Chong-Kwan,Choi, Seong-Ho 대한치주과학회 1996 Journal of Periodontal & Implant Science Vol.26 No.2

Regeneration of the periodontal tissue destroyed by periodontal disease is one of the final goals of periodontal therapy. In the past few years, periodontists have used various alloplastic grafting materials in an attempt to regenerate bone lost from periodontal disease. These materials have used widely because they have shown to be nontoxic, biologically compatible with surrounding host tissue and chemically similar to bone. The purpose of this study was to investigate the effect of Porous Resorbable Calcium Carbonate and Porous Replamineform Hydroxyapatite on the regeneration of the alveolar bone and the healing of roots transplanted into the periodontally diseased extraction sockets of dogs. The experimental chronic periodontitis was induced by elastic ligatures on the 2nd and 3rd mandibular premolars of 2 adult dogs for 8weeks after surgically creating periodontal defect. The extracted root were split in half along the long-axis, and the extend of plaque exposure was marked on the root surfaces with burs. The roots were inserted in extraction sockets with Porous Resorbable Calcium Carbonate(PRCC) in left side and with Porous Replaminefrom Hydroxyapatite(PRH) in right side. The flaps were sutured to cover the sockets completely. The animals were sacrificed after 12 weeks of healing, and the specimens were examined histologically. The results were as follows: 1. No inflammatory reactions were observed in either groups. 2. Hoot resorption was observed in both groups while the general outline of the roots were maintained. 3. PRCC was almost completely resorbed and replaced with new bone, while R.H.A. was not resorbed & remained encased in newly-formed C-T and alveolar bone. 4. PRH was encapsulated with alveolar bone which has been deposited from apical & lateral area of the sockets, while the coronal portion of the sockets were filled with C-T. 5. In both groups, the resorbed portions of the roots were replaced with new bone. These results suggest that either PRCC or PRH may not interfere with bone formation or healing in extraction sockets, and in some degree, retard the root resorption. Because the roots maintained in anatomy, we think that graft materials prevent the root resorption.

생활폐기물소각장 안전관리 개선 사례

김종환,Kim, Jong-Hwan 대한산업안전협회 2007 안전기술 Vol.109 No.-

교육정보시스템이 교육성과에 미치는 영향에 관한 연구

김종환,박명종,Kim, Jong-Hwan,Park, Myung-Jong 한국산업정보학회 2010 한국산업정보학회논문지 Vol.15 No.5

For the education information system, evaluation of the performance have to incorporate the special characteristics od education. This paper is to develop some measures to assess the performance of Korean National Education Information System (NEIS). Performance measures are classified those into three detailed areas as the flow of value chain. which include end-users area, education process area and performance area. Research results show that the users's concern to the information system have an affirmative influence on the satisfaction of users, and attitude change of users have also a positive influence on the administration area of the information system such as task productivity, task innovation, satisfaction of the education users, activity of control process. Also, user's satisfaction for NEIS, that comes from the communication, have an affirmative influence on the better performance of education,

CdTe QDs 용액 안정성의 장시간 유지지속을 위한 TGA(thioglycolic acid)의 첨가효과

김종환,김태희,구동건,기경범,최원규,한경석,류봉기,Kim, Jong-Hwan,Kim, Tae-Hee,Gwoo, Dong-Gun,Kee, Kyung-Bum,Choi, Won-Gyu,Han, Kung-Seok,Ryu, Bong-Ki 한국재료학회 2012 한국재료학회지 Vol.22 No.9

This paper focuses on the after synthesis of CdTe quantum dots(QDs) in aqueous solution. CdTe nanoparticles were prepared in aqueous solution using mercaptocarboxylic acid or thioglycolic acid(TGA) as stabilizing agents. QDs emit light smaller than the nano size. The contents of the mercaptocarboxylic acid, and a kind of raw material, were revealed for a period of time. We succeeded in synthesizing a very high quality QDs solution; we discussed how to make QDs better and to keep them stabilized. TGA is known as one of the best stabilizing agents. Many papers have mentioned that TGA is a good stabilizing agent. We dramatically confirmed the state of QDs after the experiments. The QDs solution can be influenced by several factors. Different content of TGA can influence the stability of the CdTe solution. Most papers deal with the synthesis of CdTe, so we decided to discuss the after synthesis process for the stability of the CdTe solution.

새로운 백금 착체(II) 화합물의 흰쥐 혈장에서 대사체 확인

김종환,조요나,노영수,서성훈,정지창,장성구,이규홍,이주한,이경태,Kim, Jong-Whan,Jo, Yo-Na,Rho, Young-Soo,Seo, Seong-Hoon,Jung, Jee-Chang,Chang, Sung-Goo,Lee, Kyoe-Heung,Lee, Joo-Han,Lee, Kyung-Tae 한국약제학회 1998 Journal of Pharmaceutical Investigation Vol.28 No.3

KHPC-002 $[(trans-l-diaminocyclohexane-bis-l,2(diphenylphosphinoethane)platinum)\;{\cdot}2NO_3]$ and $KHPC-006[(cis-diaminocyclohexane-bis-1,2(diphenylphosphinoethane)platinum)\;{\cdot}2NO_3]$ were synthesized as candidates for third platinum antitumor agent. Before their pharmacokinetic study, we optimized the analytical condition with HPLC and identified the major metabolites in the rat plasma. HPLC analysis by $C_{18}$ reverse-phase column showed that standard peak of both compounds appeared rapidly at around 1 minutes, whereas metabolites of KHPC-002 and KHPC-006 which were extracted from plasma after single I.V. administration in rats or incubation for 24 hr at $37^{\circ}C$ showed retention time of $10{\sim}11$ minutes. These metabolites were identified as the major compound by Matrix Associated Laser Deposition/Ionization (MALDI), which only lose the 2 molecules of $NO_3$. Based on these results, we suggest that the major metabolites of KHPC-002 and KHPC-006 were [trans-l-diamino-cyclohexane-bis-l,2(diphenylphosphinoethane)platinum] and [cis-diaminocyclohexane-bis-l.2(diphenylphosphinoethane)platinum], respectively.

자랑스러운 KSLA인(人) - 김태승

김종환,Kim, Jong-Hwan 한국전문도서관협의회 2010 KSLA bulletin Vol.2 No.-