가토 하악과두 연조직 피개가 과두골성형술시 치유과정에 미치는 영향에 관한 실험적 연구

장동호,이동근,김수남,Jang, Dong-Ho,Lee, Dong-Keun,Kim, Soo-Nam 대한악안면성형재건외과학회 1991 Maxillofacial Plastic Reconstructive Surgery Vol.13 No.3

During the condylar shaving procedure, the articular soft tissue cover can be removed. Author compaired the histological healing process of the articular soft tissue cover between the preservative and unpreservative group group with 45 New Zealand rabbits(Average wt. : about 2.5kg). In unpreservative group, the usual high condylar shave with the removal of soft tissue cover was performed. In the preservative group, the underlying bone, replaced in its original position and sutured. The animals were sacrified 1, 2, 3, 4, 6 weeks interval after operation. The specimens were fixed in 10% neutral formalin and decalcified, paraffin embedded and stained by Hematoxylin & Eosin, and Masson's trichrome. The obtained results were as follows. 1. The condyles of the both group were covered with an articular sop tissue layer. 2. The cartilage cells in subarticular layer has regular continuous patterns in the preservative group but frequently interrupted in the unpreservative group. 3. The incision made in the posterior part of the articular surface for the elevation of the articular soft tissue frequently caused a deformity such as the interruption of the subarticular layer of cartilage. 4. By the above findings, the preservation of articular sop tissue cover may be the effective operation method on concept of bone remodelling.

국산 대마섬유의 Alkali처리에 의한 미세구조에 관한 연구

장동호,김태훈,이경희,Jang, Dong-Ho,Kim, Tae-Hun,Lee, Gyeong-Hui 한국섬유공학회 1976 한국섬유공학회지 Vol.13 No.2

The crystallinity, crystallite sizes and orientation of hemp fibers treated in caustic soda of various concentration with and without constraint were measured by wide angle X-ray diffraction method. It was found that, 1) The crystallinity monotonously decreased with the increase of caustic soda in the samples treated with constraint, whereas it decreased and again increased with the increase of alkali concentrations in the samples treated without constraint. 2) Crystallite sizes of 002 plane decreased with increase of alkali concentrations, more remarkable decrease occured in the samples treated with constraint, And there were no significant changes on the crystallite sizes of 040 plane in the samples treated with and without constraint. 3) The orientation increased in the samples treated with constraint, whereas it decreased in the samples treated without constraint. The foregoing observations indicate that it is advisible to avoid high alkali concentration and excess tension.

신안군 무인도서 생태보전권역 설정에 관한 연구

김장수 ( Jang Soo Kim ),장동호 ( Dong Ho Jang ) 한국사진지리학회 2011 한국사진지리학회지 Vol.20 No.4

이 연구는 무인도서의 생태보존권역 설정을 위하여 지형경관을 평가하고 등급화 하였다. 이를 위해 신안지역에 신안군 지역에 산재한 20개를 현지조사 하였다. 연구결과, 신안군의 무인도서는 절대보전지역(I), 보존지역(II), 준보존지역(III), 이용가능지역(IV)으로 분류할 수 있었다. 그 결과, 절대보전지역(I)으로 평가된 도서는 흑도, 장도, 소룡도, 죽도, 지실도, 하죽도 등 6개이며, 보존지역(II)으로 평가된 도서는 저도, 장구섬, 마도, 인도, 기상도, 송도, 상죽도, 대과도 등 8개이며, 준보존지역(III)으로 평가된 도서는 소장도, 소송도, 안도 등 3개 이며, 이용가능지역(IV)으로 평가된 도서는 소기도, 가학도, 소죽도 등 3개이다. 특히 절대보존지역 및 보존지역으로 선정된 도서는 지형경관 자원이 우수해 훌륭한 자연학습장 또는 야외연구실로 활용될 수 있을 것으로 기대된다. This study has evaluated and leveled the geomorphological landscape for the setting of an ecological preservation zone on uninhabited islands. The 20 uninhabited islands, which are scattered around the Sinan-gun region have been surveyed on field. As a result of study, uninhabited island off Shinan-gun was classified the absolute preservation areas(I), preservation areas(II), quasi-preservation areas(III), and a available areas(IV). These results evaluated 6 islands of Heuk-do, Jang-do, Soryong-do, Juk-do, Jisil-do, and Hajuk-do to be absolute preservation areas(I), the 8 islands of Jeo-do, Janggu Island, Ma-do, In-do, Gisang-do, Song-do, Sangjuk-do, and Daegwa-do to be preservation areas(II), the 3 islands of Sojang-do, Sosong-do, and An-do to be quasipreservation areas(III), and the 3 islands of Sogi-do, Gahak-do, and Sojuk-do to be available areas(IV). Those islands selected as absolute preservation areas and preservation areas have especially outstanding geomorphological landscape resources, and are expected to be able for use as natural study fields or as outdoor laboratories.

이중지수평활법을 이용한 미래 토지지목 변화 예측 및 침수 취약성 평가

장동호 ( Dong Ho Jang ),박지훈 ( Ji Hoon Park ),김찬수 ( Chan Soo Kim ) 한국사진지리학회 2012 한국사진지리학회지 Vol.22 No.2

이 연구에서는 토지지목 자료를 이용하여 서산시의 토지지목별 변화를 탐지 및 예측하고, 고해수면 복원자료 및 IPCC SRES 시나리오를 바탕으로 해수면 상승에 따른 침수취약성을 평가하였다. 토지지목 예측 방법은 이중지수 평활법을 사용하였다. 연구결과, 토지지목 자료를 이용한 시계열분석에서는 논과 인공구조물, 수역, 초지, 나대지 등이 증가하였고, 반면에 산림지, 습지, 밭 등은 감소하였었다. 이중지수 평활법을 이용한 토지지목변화를 예측한 결과, 2010년에서 2050년까지 산림지, 초지, 습지, 논, 밭의 경우 지속적으로 감소하는 반면, 수역, 인공구조물, 나대지는 계속해서 증가하는 경향을 보였다. 침수 취약성 평가에서는 인공구조물과 논, 밭, 나대지 등은 침수 피해 면적이 증가하는 반면에 산림지, 수역, 습지 등은 침수 피해 면적이 감소하는 것으로 분석되었다. 특히 농경지와 인공구조물의 침수 위험성이 증가하는데 비해, 습지, 산림지의 침수 위험성은 감소하였다. 이러한 침수 면적의 증가 및 감소 원인은 해안지역에서 이루어지고 있는 관광지 개발과 산업단지 건설 등에 따른 산업화·도시화 등의 토지이용 변화에 따른 것이다. In this study, we detected and predicted changes in terms of land categories of Seosan-si using land category data. We also evaluated flood vulnerability due to the rise in sea level based on the past sea level recovery data and IPCC SRES scenario. As a method of predicting land category, this study applied the double exponentially smoothing method. Results of the time series analysis using land category data revealed that paddy, artificial structure, water, grass field and bare land areas increased, but forest, marsh and dry field areas decreased. The results of predicting changes in land category using double exponentially smoothing showed that forest, grass field, marsh, paddy and dry field areas will continue to decrease from 2010 to 2050, but water, artificial structure and bare land areas are expected to increase continuously. Through flood vulnerability assessment, it was analyzed that flood-affected areas in artificial structure, paddy, dry field and bare land areas increased, but those in forest, water and marsh areas decreased. In particular, the risk of flooding in agricultural land and artificial structure increased, but that in marsh and forest areas decreased. It is estimated that the increase and decrease in inundation areas is caused by changes in land use resulting from industrialization and urbanization due to the construction of industrial complexes and development of tourist resorts that takes place in coastal areas.

Landsat 자료를 이용한 금강하류의 충적주 환경변화에 관한 연구

장동호 ( Dong Ho Jang ),지광훈 ( Kwang Hoon Chi ),이봉주 ( Bong Joo Lee ) 大韓遠隔探査學會 1995 大韓遠隔探査學會誌 Vol.11 No.2

The study is focused on the analysis of geomorphological environment changes of alluvial bar in the lower Kum River using satellite-based multitemporal/multisensor data. Landsat datas for environment changes analysis consists of Landsat MSS(2 scenes) and Landsat TM(7 scenes) acquired from 1979 to 1994. This study is to develop the analysis techniques for the environment change detection of using ratio, classification, false color composite etc, of Landsat data especially useful to the geomorphological study of tidal flats and river channels. The results of this study can be summarized as follows: 1. The lower Kum River alluvial bar have had rapid geomorphological changes after the construction of the temporary dam to block the river flowing in 1983. The most alluvial bar located in the river has both bankway growth, especially the alluvial bar in the Lower Kum River had grown between 1983 to 1990. 2. After construction of the estuarine barrage, no remarkable geomorphological changes have been found in Kum River area but the growth and formation of new underwater bar has continued. The enormous materials was needed for the growth and formations of new underwater barrier islands and bar would be supplied from the sea bottom and the river sediment to diminish of stream velocity after construction of the estuarine barrage.

연구논문: 원격탐사 자료를 이용한 천수만 간석지 환경변화에 관한 연구

장동호(Dong Ho Jang),지광훈(Kwang Hoon Chi),이현영(Hyoun Young Lee) 한국환경영향평가학회 2002 환경영향평가 Vol.11 No.1

The purpose of this study is to analyze the geomorphological environment changes of tidal flat in the Cheonsu Bay. Especially, it centers on the changes in the sedimentary environment using remote sensing data. Multi-temporal Landsat data and topographic maps were used in this study. The results are summarized as follows: the tidal flat of Cheonsu Bay changes in many ways depending on the direction of the tidal current. In the neighborhood of Ganwoldo, the scale of the tidal flat has continuously been expanded due to the superiority of sedimentation after a tide embankment was built. When we analyzed the grain size of sediments and implemented in-situ field survey, it was found that the innermost part of the bay consists of a mud flat, with the midway part mixed flat, and the nearest part to the sea sand flat. On the other hand, in the neighborhood of Seomot isle and its beach, sedimentation is superior in the eastern part whereas erosion is superior in the western part. In other words, the western coast of the beach is contacted with the open seas and under much influence of ocean wave. The eastern coast is placed at the entrance of the bay and has sand bar and tidal flat developed due to submarine deposits that are accumulated on the sea floor by the tidal current. In conclusions, remote sensing methods can be effectively applied for quantitative analysis of geomorphological changes in tidal flat, and it is expected that the proposed schemes can be applied to another geomorphological environments such as beach, sand dune, and sand wave.

Landsat TM 자료와 표충퇴적물 분석을 통한 천수만 간석지 퇴적물 분류

장동호 ( Dong Ha Jang ),지광훈 ( Kwang Hoon Chi ),이현영 ( Hyoun Young Lee ) 한국환경영향평가학회 2002 환경영향평가 Vol.11 No.4

This study aimed at verifying the grain-sized distribution of surface deposits in a tidal flat using multi-spectral Landsat TM. In this study, we employed the grain-sized analysis, PCA and unsupervised classification techniques for analyzing the distribution of deposits. As a result in this study, the unsupervised classification method using PCA image was found to be most useful in classifying tidal flat deposits using satellite data. This method is considerably effective in analyzing not only the aspects of distribution in terms of accumulated deposits and erosion, but also the changes in seaside topofraphy and shoreline. The grain-sized distribution analysis indicates that the mud flat inside the Cheonsu-bay tidal flat is disrtibuted, the mixed flat located in the middle, and the sand flat distributed near the sea. The sand flat is dominant around the southern part of Seomot isle and its beach. On the other hand, the mud and mixed flat is dominant on the western part. Likewise, the western coast of Seomot isle and its beach is significantly affected by waves facing the offshore. However, the eastern side of the bay could be a site for the evolution of tidal flat made of fine materials where it is less affected by ocean waves. These results show that multi-spectral satellite data are effective for the classification of distribution materials and environmental impact assessment and cintinuous monitoring. In particular, the research on environmental deposits can provide important decision-supporting information for decision-making on seaside development, by analyzing the progress of deposits and environmantal changes.

지방정부의 복지기능에 관한 신맑스주의(neo-Marxism)적 이해

장동호 ( Dong Ho Jang ) 한국사회복지정책학회 2010 사회복지정책 Vol.37 No.2

오존층 파괴 대책을 위한 혼합냉매에 관한 연구 : “기존 냉매(R-22) 대체제에 관하여”

장동호(Dong Ho Jang) 산업기술교육훈련학회 2016 산업기술연구논문지 (JITR) Vol.21 No.2

This paper is an experiment to find a mixed refrigerant that does not destroy the ozone. Experiments were mixed with a new high-pressure R-410A refrigerant and a new low-pressure R-134a refrigerant. This is the method to find the most similar mixed refrigerant, such as R-22 refrigerant. The experiment was measured changes in temperature and pressure of each item. If found, a refrigerant such as R-22 without replacement of the equipment can be used for conventional air conditioning. In addition, cost savings and protect the environrnent and can be of great econornic benefit.

산사태 재해에 대한 보은지역의 시설물 위험분석

장동호 ( Dong Ho Jang ) 한국지형학회 2006 한국지형학회지 Vol.13 No.3