라오스의 벼 생산 현황과 문제점

이문희,최경진,이정일,정남진,양원하,김제규 한국국제농업개발학회 2001 韓國國際農業開發學會誌 Vol.13 No.4

Rice is the single most important crop in Lao PDR. In the 2000 rice production year, total rice production in the Laos reached 2.2 million tons. This is regarded as sufficient to provide national self-sufficiency. The rice harvested area in 2000 was approximately 719,500ha and represented 80% of cropped land area. Approximately 82% of production was from wet season cropped and 18% was from the irrigated dry season. Grain yield per unit area vary from 1.68 to 4.39 ton/ha in the wet season environment. However, the highest grain yield (4.39 ton/ha) obtained from the dry season irrigated crop. Higher yields and reduced year variation in production can be expected with the further intensification of production systems in the low land environments. However, further imporvements in production will be dependent on higher levels of inputs and further alleviation of some the production constraints.

비만을 동반한 위암 환자에서 두 병을 같이 수술 치료한 경험(증례)

최경현,윤기영,문형환,신연명,서경원,안수미,송윤미,석정희,정경연,이은하 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.3

Obesity is growing problem in Korea. We had a case of bariatric surgery during gastric cancer operation. Patient was 29 year old Korean lady with early gastric cancer located in the lesser curvature side of the middle 1/3 of the stomach. Her body weight was 89 kg, height 163 cm, and thus body mass index was 33.5 kg/m2. Preoperative blood pressure was 130/90 mmHg, hemoglobin 12.9 g/dL, total lymphocyte count 3,280/mL, serum albumin 4.3 g/dL, CEA 1.1 ng/mL, CA 19-9 9.1 ng/mL, and alpha fetoprotein 2 ng/mL. Another associated disease was right thyroid follicular neoplasm. The chest X-ray was normal. After IM injection of 2,500 units of heparin 30 minutes before the induction of general anesthesia, she received curative subtotal gastrectomy and Roux en Y gastrojejunostomy when a malabsorption loop of 120 cm jejunum was incorporated between the Treitz ligament and the end to side jejuno-jejunostmy site at May 29th 2006. Her postoperative course was uneventful except a minor wound seroma and the elevations of serum amylase(up to 4 folds) and lipase(up to 2 folds). She lost her body weight 9 kg in 5th, 21 kg in 7th, and 27 kg in 10th postoperative months to became 61.5 kg. On follow up exams in July 2008, she gained 4 kg to overcome her weakness and fatigue. From the above result, the incorporation of a malabsorption loop during reconstruction phase of gastric cancer operation was a good option for obese gastric cancer patients especially in cases of early gastric cancer.

RSA 및 프랙탈 이론에 기반한 동기식 스트림 암호화 시스템의 설계 및 구현

하경재,문철곤 경남대학교 정보통신연구소 2000 연구논문집 Vol.2 No.-

오늘날 컴퓨터는 기술의 발전과 대중화로 인하여 대다수의 기업 또는 개인에게 사용되고 있다. 또한 컴퓨터 네트워크의 보급으로 서로의 정보 교환 및 자원공유가 가능해 졌으며 다양한 정보서비스가 네트워크상에서 이루어져 컴퓨터는 가장 중요한 정보 저장소가 되었다. 이러한 발전에 따라 정보의 보안 문제가 더더욱 크게 중요시 되고 있으며 보안에 관련하여 많은 연구와 관련 제품 등이 개발되고 있다. 그러나 기존의 암호 시스템은 하드웨어를 기반으로 하거나 단순한 평문 메시지를 대상으로 하고 있으므로 멀티미디어와 같은 대용량 정보를 다루거나 실시간으로 정보를 보관, 전송하기에는 어려움이 따른다. 본 논문에서는 이러한 기존 시스템을 결점을 보완하고자 동기식 스트림 암호방식에 프랙탈 이론과 RSA 암호화 방식을 도입한 새로운 암호화 시스템을 제안하고자 한다. Computer networks make computers possible to exchange information and share the resources. With the various information services on the network, computers are the most important data storing place and security is becoming more essential. Especially Encryption systems can maximize the security because the information can not be decrypted even when it is released by illegal hacking. It is hard to manage large data and to store or transfer the data on real time became existing Encryption system depends on hardware and is just for text messages. To cover these drawbacks, we propose a new encryption system based on the fractal and RSA encryption method which are added to the synchronized stream encryption method. For efficient composition of system, it is divided into three different parts which are key management server, key generator and RSA encryption process implemented by java for platform-independent system. Also, the fractal theory is applied for solution of key randomness that can be considered the most important point on security.

단계적 온도 하강법을 이용한 췌도세포 냉동보존법

정인경,오승훈,김병준,양태영,이병완,하창영,노정현,정재훈,민용기,이명식,이문규,김광원 대한당뇨병학회 2002 Diabetes and Metabolism Journal Vol.26 No.1

연구배경:최근 당뇨병의 새로운 치료법으로 시도되고 있는 췌도이식은 충분한 췌도수의 확보와 췌도생존율을 높이기 위한 면역억제제 사용이 제한점이 되고 있다. 본 연구의 목적은 이식 전 충분한 췌도 수의 확보를 위해 분리한 췌도를 냉동보존하는 방법을 확립하고 냉동보존한 백서 췌도세포의 시험관내 그리고 생체내 기능을 조사하였다. 방법:분리한 백서의 췌장소도를 48시간 배양한 후 한 시험관당 췌도세포 1000개씩 나누었다. 냉동보존은 6개의 시험관에 DMSO를 첨가한 후 초 냉각(supercooling), 핵화(nucleation)단계를 거친 후 99% isopropanol과 액체질소가 들어있는 dewer를 이용하여-0.25℃/분의 냉각속도로 -40℃까지 단계적으로 얼린후-70℃ 액체질소 탱크에 보관했다. 해동은 냉동시킨 vial들을 액체 질소 태으에서 꺼내 37℃ 항온조에 담가 급격히 해동시킨 후, 원심분리하여 상층액을 제거하고 각 vial에 0.75M sucrose 용액을 가한 후, 10% fetal calf serum이 함유된 RPMI 1640 media에서 배양하였다 각각 6개의 시험관에서 해동한 췌도들을 광학현미경 및 형광현미경하에서 췌도의 모양과 생존율에 대해 조사하고 인슐린 정적반응을 알아보았다. 또한 분리한 췌도를 냉동보존하지 않고 이식한 경우를 대조군(6마리)과 생체내 기능을 비교하였다. 결과:① 냉동보존후 획득한 췌도의 수와 생존율 해동후 획득한 췌도의 수는 해동시킨 당일날이 902±21, 24시간 배양 후에는 857±16, 72시간 후에는 817±18개로 점차 감소되었다. AO/PI 염색상 각 췌도의 생존율은 냉동 전을 100으로 하였을 때 해동당일, 24시간 후, 72시간 후가 각각 60±5, 80±5, 90±5%로 해동후 3일간 배양하였을 때 냉동전의 수준으로 회복하였다. ② 냉동보존후 췌도의 포도당에 대한 정적 인슐린 분비능:냉동직후 감소된 경향을 보였으나 해동후 3일간 배양한 췌도의 인슐린 분비는 냉동전과 통계적으로 의미있는 차이가 없이 냉동보존 전의 수준으로 회복되었다. ③ 냉동보존후 췌도의 포도당에 대한 동적 인슐린 분비능:냉동보존한 췌도를 해동후 3일째의 인슐린 동적 분비능은 냉동 전과 마찬가지로 자극 인슐린의 반응의 제1기와 2기가 잘 관찰되었다. ④ 냉동보존한 췌도세포 이식 후 혈당 변화:스트렙토조토신으로 유도된 당뇨병 쥐에 췌도이식 후 혈당은 냉동보존한 췌도이식군에서 대조군에 비해 혈당의 조절효과가 더 오래 지속되었다. 결론:소동물에서 단계적 온도 하강법을 이용한 췌도세포 냉동보존법을 확립하였으며 이는 기능, 구조 및 생존율에 큰 이상을 보이지 않았으므로 장차 사람의 췌도세포 동종이식시 부족한 췌도세포수를 극복하고 면역반응을 줄일 수 있는 매우 유용한 방법이 될 것으로 판단된다. Background : Although islet transplantation has been attempted to reverse the state of diabetes, achieving a critical number of islets and modulating the immune response limit the success of islet transplantation. Cryo-preservation of islets offers many important benefits for islet transplantation by collecting islets with a wide variety of HLA phenotypes and islet MHC expression. The aims of this study was to determine the optimal conditions for cryo-preservation by using a controlled cooling method and to evaluate in vitro and in vivo functional properties of the cryo-preserved islets. Methods : Collagenase-isolated, Ficoll-purified islets were cultured for 48 hours. They were aliquoted into freezing tubes (1000 islets per tube), equilibrated with 2M dimethyl sulfoxide (DMSO) in three steps, supercooled, nucleated, and controll-cooled at rate of 0.25℃/min to - 40℃ prior to storage at - 196℃. Rapid thawing and removal of DMSO with 0.75 M sucrose preceded 48 hour of culture and the morphology, viability, glucose-induced insulin secretion, and in vivo function of rats transplanted with cryopreserved islets was reexamined. Results : ① Recovery was 90.2±0.2%, 85.7±0.1% and 81.7±0.1% immendiately after, 24 hours and 72 hours after thawing respectively. The viability was 60±5%, 80±5%, 90±5% immediately after, 24 hours and 72 hours after thawing respectively. ② The glucose-stimulated-insulin secretion (GSIS) tended to decrease immediately after thawing, but GSIS increase to the level of pre-cryopreservation 72 hours after thawing. ③ The in dynamic GSIS, the first and the second phase of insulin secretion were well preserved in islets cultured for 72 hours after thawing. ④ The cryopreserved islets were cultured for 3 days and transplanted into renal sub-capsular space of streptozotocin (STZ) induced diabetic rats. The duration of normoglycemia in the STZ-induced diabetic rats transplanted with cryopreserved islets was significantly longer than of the fresh islets. Conclusion : The optimal condition of cryopreservation using the controlled cooling method was established in rat pancreatic islets. This cryopreservation method can be a feasible approach for human islet transplantation (J Kor Diabetes Asso 26:64~74, 2002).

논의과정 활용 수업이 초등학생의 학습 동기와 과학태도와 미치는 영향

이하룡,남경희,문성배,김용권,이석희 한국초등과학교육학회 2005 초등과학교육 Vol.24 No.2

The purpose of this study is to examine the effects of science instruction using argumentation, with Tolumin's structure of argument, on students' learning motivation and scientific attitude. In the instruction, well-structured problems selected to be argument, in which interactions among students are stressed. The subjects were classified into two groups: One group is composed of sixty-seven students (experimental group) who were participated in solving processes of the scientific argument tasks, and the other is composed of sixty-nine students (comparative group) who were participated in the traditional teaching method. The results of this study implied that experimental group has a positive effect on students' learning motivation and scientific attitude.

p-형 Si(100) 기판 위에 성장시킨 Bi_(3.25)La_(0.75)Ti₃O_(12) (BLT) 박막의 전기적 특성

최은경,박문흠,김현주,하태곤,강민주,김상수 昌原大學校 基礎科學硏究所 2003 基礎科學硏究所論文集 Vol.15 No.-

Bi₃zsLa(0.75)Ti₃0_(12) (BLT) thin film have been grown on p-type Si(l00) substrates by a sol-gel spin coating process. The structure and surface morphology of the film were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEMI. Furthermore, the electrical properties were examined by capacitance-voltage ( C-V) characteristics by using a LF Impedance Analyzer(HP 4192A). XRD measurement show layered perovskite structure with a single phase in BLT thin film annealed at 700C for 30 min in oxygen. The measured grain size of BLT on Si is about 0.04 - 0.1 pn. From the cross-sectional SEM image, BLT film thickness is measured to be 0.4 pm. The C-V characteristic hysteresis curves show that the NIFS (metal-fexroelectric-semiconductor) structure has memory effect. The memory window decreases, with increasing frequency at MFS structure. And it is found that the memory window increases as the applied voltage to the ferroelectric capacitor is increased. These phenomena may be due to polarization reversals of the BLT ferroelectric film and because of the charge injection from Si substrate into the ferroelectric thin film. The results obtained indicate that the present BLT films are suitable for making ferroelectric field effect transistor(FeFET) memory.

상악골 침범 소견을 동반한 선천성 침윤 지방종

허경회,이향옥,이서영,최형길,하병각,문제운,이삼선 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.37 No.2

Infiltrating lipoma is a rare mesenchymal neoplasm that, in spite of benign nature, characteristically infiltrates adjacent tissues and tends to recur after surgery. It has a predilection for the extremities and the trunk and is extremely rare in the head and neck region. We present a case of congenital infiltrating lipoma of the face, describing the intrabony invasion and osseous dystrophy as well as the soft tissue changes seen on plain radiographs and magnetic resonance imaging.

놀래기류에 기생하는 기생성 요각류, Caligus chanos에 관한 연구

고유봉,문성하,강경표,고경민 제주대학교 해양연구소 1997 해양자원연구소연구보고 Vol.21 No.-

The parasitic copepod. Caligus chanos parasitized on labridae fish around MunSum. Cheju Island, have been basically studied form Sep.. 1996 to Aug.. 1997. Parasitic pattern and water temperatures have a close relationship. which is high in June and low form Feb. to Apr.. Fishes of main hosts were Pseudolabrus japonicus and Pteragogus Ragellifer. Parasitic copepods prefer the body and tail of the host to the head, and prefer adult host to juveniles or older one.

大學 新入生의 道德的 事態判斷 水準 및 槪念化 樣相의 分析

宋明子,趙鏞夏,薛耆汶,李京淑 東亞大學校 學生生活硏究所 1988 學生硏究 Vol.17 No.-

This study was conducted in order to analyze freshmen's level of cognitive judgment of moral situations and their conceptions of moral situation in different conceptual domains. The research questions to be answered in this study were as follows : 1) What are freshmen's levels of the judgment in moral situations, and are the levels differentiated according to their sex and majors? 2) What are the justifications in each domain? In other words, how do justifications of nonpermissibility, generality, and rule-independency differ in such domains as moral, conventional, and personal? 3) How are freshmen's conceptions of moral situation characterized? Subjects in this study were 200 freshmen(131 boys and 79 girls) randomly sampled from Dong-a University. The instruments were Kim's(1985) Test of Moral Development Judgment which was translated from Rest's(1979) DIT, and 9 interview situations for moral judgment and justfication developed by the current researchers on the basis of Turiel's theory. Subjeects were presented with six moral dilemas and 9 moral situations by 10 research aides who are seniors of education department of dong-A University, specially trained for this study. Data were analyzed statistically to answer the research questions. The major findings of this study were as follows: 1) More freshmen attained level P in terms of judgment of moral situations, while some other students did levels three and four. Therfore, it is considered that a large amount of freshmen start the principled-stage thinking. 2) Many freshmen showed high degree of transitional phase(4½) as level P according to frequencies in each moral stage. This reflects the apparent regression from the hightest stages to stage 2 during freshmen's campus life. Additionally, this kind of regression is found in arts and physical education students rather than other students. 3) There is no sex difference in the levels of freshmen's moral judgment. 4) Freshmen justified the transgressions in moral situations on permissibility and generality. Therefore, they appear to view moral issues as more legitimately subject to moral domain. In part, they tend to view moral issues as subject to conventional domain in that they justify the affairs related to peers of elders on rule-dependence. 5) Freshmen's domain distinction was apparent in that they justified conventional issues on generality. However, they are also seem to moralize since they partly view conventional issues containing relationships with parents as subject to moral domain. 6) Freshmen justified personal issues on rule-dependence and generality. Therfore, it is concluded that they justify the personal issues as subject to conventional domain. 7) Freshmen are more likely to reason about moral issues as personal obligation and sort them as under moral domain. However, within-domain differences in justifications are apparent in that freshmen treated the moral issues as subject to customs or traditions, or personal choice. 8) A strong moralizing is evident in that freshmen conceived conventional issues in terms of other's welfare rather than conventional reason. 9) The within-domain consistence is obvious in that freshment reasoned about personal issues as personal and sort them as under personal domain. However, it is found freshmen's moral conceptions are dependent on situations because some students justified personal issues on other's welfare or obligation while other sutdents did on moral reasons and conventional sanctions or customs.

연중독의 1예

최우근,윤종경,문성채,최하진 인제대학교 1982 仁濟醫學 Vol.3 No.3

위장관 증상으로 내원하여 연중독증으로 확진된 1예를 보고한다. A case of the lead poisoning associated with gastrointestinal symptoms in a 37 year old employee is reported. The patient had a history of exposure to storage bettery-▲ works for 2 years and was admitted to this hospital because of abdominal pain and distention for 3 days. The initial studies were performed. On peripheral blood, anemia, reticulocytosis and basophilic stippling of the red cells were observed. Mild erythroid hyperplasia and prominent basophilic stippling of the red cells were recognized on the bone marrow aspiration. The lead concentration in serum and urine were 88mg/dl and 250mg/l, respectively. Symptomatic therapy was done.