전산화 단층사진술에 의해 예증된 구치부 무치악 하악골의 골개조

박창서,Park Chang-Seo 대한영상치의학회 1999 Imaging Science in Dentistry Vol.29 No.1

Purpose: The aim of this study was to analyze radiologically the location and course of the mandibular canal and to observe the alveolar and basal bone changes during the remodeling procedures of atrophic mandible. Materials and Methods: CT scanning was performed on dry 30 edentulous or partially dentulous mandibles. In 48 edentulous lower halves, measuring areas were determined by three points in the length of the mandibular canal. The distance from the mandibular canal towards cranial and caudal edges, buccal and lingual external borders of the body of the mandible were measured. A statistical comparison between the mean values of different classes of mandibular body was carried out in the selected areas. Results: The distance between the mandibular canal and caudal borders of the body of the mandible and lingual borders dose not change in the atrophic process of mandible. The mandibular canal within the mandible courses downwards from mandibular foramen towards mesial and subsequently it gets to the mental foramen. The distance between the mandibular canal and buccal external border of basal bone changes similar to the change of cranial borders of alveolar bone in the atrophic process of mandible. Conclusion: CT scanning was very effective and practicable to analyze the location and course of the mandibular canal and to observe the alveolar and basal bone changes of atrophic mandible. Also more detailed investigation of basal bone changes observed during the remodeling procedures of atrophic mandibles seems reasonable to rely on the massive anthropologic collections of atrophic mandibles combined with CT scanning.

부분 무치악 하악골의 치조골 및 기저골 변화에 관한 방사선학적 평가

박창서,김기덕,Park Chang-Seo,Kim Kee-Deog 대한영상치의학회 2002 Imaging Science in Dentistry Vol.32 No.3

Purpose : The purpose of this study was to propose standard values for alveolar and basal bone in normal adult mandibles, and radiologically analyze the remodeling process of the edentulous mandible by examining molar areas and comparing them to the established normal values. Materials and Methods : Panoramic and CT scans of mandible were performed on 20 normal adults and 20 edentulous or partially edentulous adults. In both groups, arch half diameter and distance of alveolar bone were measured. Also the distance from the mandibular canal to the caudal edges, the buccal and lingual external borders of basal bone, were measured. A statistical comparison between the mean values of normal and edentulous mandibles was carried out in the selected areas. Results : There was evidence of decreasing arch half diameter and distance in the edentulous mandible, but statistically no significant change was seen between the normal and edentulous alveolar bone. There was evidence of decreasing buccal basal bone and increasing in the lingual basal bone in the edentulous mandible. A statistically significant difference between normal and edentulous mandibles was noted in the buccal basal bone. Conclusion: There was an inward and forward atrophic change of the edentulous mandibular molar area compared to the control. CT scanning required the use of sophisticated and expensive procedures to analyze the remodeling process of edentulous mandibles. Consequently, the development and application of a more simplified and objective radiographic procedure for broad and long-term study of remodeling procedures of edentulous mandible was recommended.

Salinity Effects on the Hydraulic Conductivity of Uplands

박창서,죠지 A. 오카노,Park, Chang-Seo,O'Connor, George A. 한국토양비료학회 1983 한국토양비료학회지 Vol.16 No.1

Laboratory determinations of saturated hydraulic conductivity were conducted with four soils varying in texture from sand to clay and with five waters with different salinity level. The waters varied in total dissolved solids from 1,250 to $15,000mg/{\ell}$ and in SAR from 16 to 57 and were representative of saline waters in New Mexico. Saturated hydraulic conductivities of the soils were not significantly affected by water salinity if these waters were the sole source of irrigation water. However, small additions of distilled water, assuming simulated to rain, to soils previously equilibrated with the saline waters significantly decreased soil permeability. Dispersion and short or long-distance transport of clay apparently clogged conducting pores when distilled water was introduced. Swelling was an important mechanism in reducing soil permeability only in the clay soil. The data suggest that, when saline water is the dominant irrigation source and is supplemented by rain, (1) all saline waters could be used on very sandy soils, (2) no saline waters should be used on very heavy soils, and (3) slightly saline, but not very saline, waters could be used on medium-textured soils. 미(美) New Mexico주(州)에 많이 분포(分布)하는 Sheppard사토(砂土), Doak사양토(砂?土), Lea사질식양토(砂質埴?土) 및 Glendale식토(埴土)를 대상(?象)으로 관개수질(?漑水質)에 따른 토양(土?)의 투수성(透水性) 변화(?化)를 구명(究明)하기 위(?)하여 T.D.N. $1,250{\sim}15,000mg/{\ell}$인 염류수(?類水)와 증류수(蒸溜水)를 관수(?水)하여 실내(室內)에서 수리전도도(水理?導度)를 측정(測定)하였다. 염류수(?類水)가 유일(唯一)한 관개수원(?漑水源)일 때의 수리전도도(水理?導度)는 염농도변화(?濃度?化)에 의한(依) 영향(影響)을 별(別)로 받지 않았으나 토양특성별(土?特性別)로는 Sheppard사토(砂土)가 Glendale 식토(埴土)보다 투수성(透水性)이 매우 높았다. 염류수(?類水)로 기(旣) 관개(?漑)된 토양(土?)에 양질(良質)의 관개수(?漑水) 즉(卽) 증류수(蒸溜水) 처리(?理)는 수리전도도(水理?導度)를 현저(顯著)게 감소(減少)시켰는데 이것은 사질(砂質)~양질계(?質系) 토양(土?)의 경우(境遇) 점토(粘土)의 분산(分散) 또는 장(長) 단거리(短距離) 이동(移動)에 의(依)한 Conducting pore의 봉쇄(封鎖)이며 식질계(埴質系) 토양(土?)은 점토(粘土)의 팽창(膨脹)이 주(主)된 원인(原因)이었던 것으로 판단(判?)된다. 따라서 주(主) 관개수원(?漑水源)이 염류수(?類水)이고 자연강우(自然降雨)가 수반(隨伴)되어도 사질계(砂質系) 토양(土?)에서는 문제점(問題点)이 없겠으나 식질계(埴質系) 토양(土?)은 투수성(透水性) 감소(減少)에 의(依)한 염해유발(?害誘?)의 가능성(可能性)을 내포(內包)하고 있으므로 관개시(?漑時) 고려(考慮)되어야 한다.

화산회토(火山灰土) 분류(分類) 및 CEC에 대(對)한 유기물(有機物)과 점토(粘土)의 기여도(寄與度)

박창서,김리열,조성진,Park, Chang-Seo,Kim, Lee-Yul,Cho, Seong-Jin 한국토양비료학회 1985 한국토양비료학회지 Vol.18 No.2

우리나라 화산회토(火山灰土)의 CEC에 대한 유기물(有機物)과 점토(粘土)의 상대기여도(相對寄與度)를 조사(調査)하기 위하여 38개통(個統)의 화산회(火山灰) 토양(土壤)을 흑색화산회토(黑色火山灰土)와 농암갈색화산회토(濃暗褐色火山灰土)로 구분(區分)하여 토양통(土壤統) 설정시(設定時) 이용(利用)된 대표단면(代表斷面) 자료(資料)를 이용(利用)하여 단순회귀(單純回歸)와 중선형회귀(重線型回歸)를 통계(統計) 처리(處理)하였다. 1. 우리나라 화산회토(火山灰土)는 신분류(新分類)에 준(準)하면 목(目) 3, 아목(亞目) 5, 대군(大群) 8, 아군(亞群) 15, 속(屬) 23, 통(統) 38개(個)로 분류(分類)되었다. 2. 화산회토(火山灰土) 총면적(總面積)은 139, 162ha로 제주도(濟州道) 99.56%, 울릉도(鬱陵島) 0.44% 분포(分布)하였다. 3. 흑색화산회토(黑色火山灰土)의 유기물함량(有機物含量)과 CEC는 농암갈색화산회토(濃暗褐色火山灰土)보다 높았으나 점토함량(粘土含量)은 반대(反對) 경향(傾向)이었다. 4. OM-CEC 그리고 Clay-CEC 관계(關係)는 화산회토(火山灰土)의 표토(表土)에서 유의성(有意性)이 인정(認定)되었다 5. CEC추정시(推定時) 유기물(有機物) 1g은 흑색화산회토(黑色火山灰土) 및 농암갈색화산회토(濃暗褐色火山灰土) 표토(表土)에서 각각(各各) 0.46 및 0.40me, 점토(粘土) 1g은 각각(各各) 0.11 및 0.19me만큼 기여(寄與)하였다. 6 CEC를 추정(推定)할 때 유기물(有機物)은 흑색화산회토(黑色火山灰土) 및 농암갈색화산회토(濃暗褐色火山灰土) 표토(表土)에서 점토(粘土)보다 각각(各各) 2.97, 1.23배(倍) 중요(重要)하였다. The 38 typical profiles representing volcanic ash soils (VAS) in Korea were subjected to multiple regression analysis to determine the relative contribution of organic matter (OM) and clay content to total cation-exchange capacity (CEC). This study, also, was examined the soil characteristics of VAS. VAS in Korea could be classified into 3 Orders, 5 Suborders, 8 Great groups, 15 Subgroups, 23 Families, and 38 Series. Total area of VAS was 139, 162ha and the most of them occured in Jeju Island. Simple correlation coefficients showed significance relations at OM-CEC and clay-CEC in top-soil of VAS. The partial regression coefficients indicated that CEC for each gram of OM as calculated to be 0.46 and 0.40 me per of topsoils for the black volcanic ash soils (BVAS) and the very dark brown volcanic ash soils (VDBVAS), respectively. The clay contributions of topsoils for BVAD and VDBVAS were 0.11 and 0.19 me. The standard partial regression coefficients appeared that OM content of topsoil for BVAS and VDBVAS was 2.97 and 1.23 times as important as clay content in predicting CEC.

골수이형성 증후군과 합병된 임신에서 자궁파열 1 예

임병도(Byeong Do Lim),이혁우(Hyuk Woo Lee),주성홍(Sung Hong Joo),정의식(Eui Sik Jung),박창서(Chang Seo Park),조성진(Sung Jin Cho) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.2

Myelodysplastic syndrome (MDS) is a relatively uncommon hematological disorder, charactedzed by cytopenia in the peripheral blood and normo-or hypercellularity in the bone marrow with morphological dysplastic change. Ineffective hematopoiesis leads to hematological failures in this syndrome. MDS is largeIy affected in older individuaIs with a median age of 60-75. It's association with pregnancy is even rarer. Although the exact incidence of MDS in pregancy is unknown, it is likely to be less than 1 per 100,000 pregnancies annually. Recently, we experienced a case of MDS presented initially during pregnancy in a 34-year-old primipara and managed with intensive hematologic support. Uerine rupture occurred in pregnancy complicated with MDS at 34 gestation weeks and a healthy infant was successfully delivered by Cesarean section. We report this case with a brief review of the literature.

土色分類에 依한 濟州道 土壤의 變異分析

朴昌緖(Chang-Seo Park),嚴基泰(Ki-Tae Um),金鯉烈(Lee-Yul Kim) 한국토양비료학회 1984 한국토양비료학회지 Vol.17 No.2

Salinity Effects on the Hydraulic Conductivity of Uplands.

Chang-Seo Park(朴昌緖),George A.O"Connor(죠지 A 오카노) 한국토양비료학회 1983 한국토양비료학회지 Vol.16 No.1

Ka 밴드 송신기 및 Ka 밴드 능동형 어레이 안테나 통합 유닛 모듈러 시스템 개발

박창서(Chang-seo Park),한성칠(Sung-chil Han),심형권(Hyoung-kwon Shim),우무현(Moo-hyun Woo) 한국항공우주학회 2023 한국항공우주학회 학술발표회 논문집 Vol.2023 No.6

土壤의 粒徑分布에 對한 空間變異性 分析

朴昌緖(Chang-Seo Park),金才正(Jai-Joung Kim),趙成鎭(Seong-Jin Cho) 한국토양비료학회 1984 한국토양비료학회지 Vol.17 No.3

熔岩類臺地에 分布한 土壤 特性의 變異分布

朴昌緖(Chang-Seo Park),嚴基泰(Ki-Tae Um),閔庚範(Kyeong-Beom Min) 한국토양비료학회 1984 한국토양비료학회지 Vol.17 No.4