成犬의 上顎急速側方擴大後 正中口蓋縫合線 周圍組織의 變化

長時鎬,成在鉉,權五源 慶北大學校 齒科大學 1986 慶北齒大論文集 Vol.3 No.1

著者는 成犬의 上顎骨을 急速側方擴大하여 最終擴大 1 日後, 2주, 8주保定後 軟組織을 포함한 上顎口蓋部의 脫灰標本을 製作하여 光學顯微鏡으로 관찰한 결과를 다음과 같이 要約할 수 있었다. 最終擴大 1 日後 正中口蓋縫合部가 크게 離開되어 膠原纖維는 擴大方向으로 견인되어 배열되었고 2주 保定에서 針狀의 骨형성이 진행되었으며 8주 保定에서 離開된 縫合部는 新生骨의 형성으로 현저히 협소해져 對照犬과 유사한 양상을 보였다. 最終擴大 1 日後 正中口蓋縫合周圍의 粘膜纖維가 불규칙상을 보이며 擴大된 방향으로 견인되어 있었고, 血管은 軟組織의 張力으로 인해 타원형의 양상을 보였다. 8주 保定에서 膠原纖維의 배열은 對照犬과 유사하게 整然性을 회복하고 血管의 형태도 점차 회복되어 圓形에 가까왔다. 齒槽部에서는 最終擴大 1 日後 口蓋側에서 膠原纖維의 견인과 頰側의 齒槽骨에서 破骨細胞에 의한 吸收像을 나타내었으며 保定期間의 경과에 따라 점차 回復되어 8주 保定에서 對照犬과 유사한 양상을 나타내었다. The purpose of this experimental study was to observe the histomorphological changes of the surrounding tissue of the midpalatal suture during retention following rapid maxillary expansion. Four mongrel dogs were divided into four groups: control, no-retention, two and eight weeks retention. Each of the experimental and control animals was sacrified on the no-retention, two and eight weeks retention after rapid maxillary expansion and maxilla was resected. To observe with light microscope was made de calcified specimens. The results were as follows: One day after rapid maxillary expansion, midpalatal suture was separated and the bundles of collagen fiber were stretched toward expanded direction. On the two weeks retention after rapid maxillary expansion, the separated space of the midpalatal suture was reapired with new bone of spicule type. Areas of the midpalatal suture were back to the state of control group after eight weeks retention. In the surrounding soft tissue of the expanded palatal suture, the bundles of collagen fiber were irregularly arranged, stretched toward expanded directions one day after rapid maxillary expansion, back to the state of control group after eight weeks retention. At the alveolar regions, the bundles of collagen fiber were stretched in the palatal side and bone resorption by osteoclasts was observed in the buccal side. But it was replaced with the bone depository process in the eight weeks retention. It is proved histologically that strain given to palatal soft tissue by rapid expansion is removed gradually during retention period with remodeling in bone and fiber.

쉰소리로 발현한 흉부 대동맥류 1예 : Ortner씨 증후군 orther`s syndrome

장이선,진승원,박희철,박진아,윤희정,이종민,김재형 대한내과학회 2003 대한내과학회지 Vol.64 No.1

Ortner씨 증후군은 다양한 심장 질환에 이차적으로 생긴 반회 후두 신경 마비에 의한 쉰소리를 특징으로 하는 임상 질환이다. 저자들은 흉통없이 발생한 쇤소리를 주소로 내원한 환자에서 좌측 반회 후두 신경의 손상에 따른 성대 마비의 1차원적인 원인으로 대동맥궁 부위에서의 대동맥류를 진단하였기에 문헌 고찰과 더불어 보고하는 바이다. Ortner's syndrome is a clinical entity with hoarseness due to a left recurrent laryngeal nerve palsy caused by cardiac disease. It is a recognized complication of a number of conditions including, atrial septal defect, patent ductus arteriosus, primary pulmonary hypertension, Eisenmenger's syndrome and aortic aneurysm. A 71-year-old woman with a history of hypertension and diabetes complained hoarseness and hemoptysis for 3 days. Chest X-ray showed a soft tissue mass shadow in the left upper lung field and chest CT scan revealed a thoracic aortic aneurysm. We report a case of left recurrent laryngeal nerve palsy due to a huge thoracic aortic aneurysm in an old woman. (Korean J Med 64:105-108, 2003)

아메바성 대장염과 연관된 Henoch-Scho¨nlein Purpura 1예

장재현,원경준,이준,변유미,이재광,김영훈,박찬국,김만우 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Henoch-SchonIein purpura is a common form of vasculitis primarily involving the skin, the gastrointestinal tract, the joints, the kidneys, and the nervous system. The etiological investigations are essential, because triggering factors are found in approximately half the patients such as viral, bacterial and parasitic infections, drugs, toxins, systemic diseases and cancer. But it's the correlation between Henoch-SchonIein purpura and Entamoeba histolytica has been rarely reported. We report a 29-years-old woman with Henoch-SchoIein purpura complicated by the lower gastrointestinal bleeding caused by the amoebic colitis. She complained of cramping abdominal pain, lower extremity purpura and hematochezia. Cysts and trophozoites of Entamoeba histolytica were detected in her stool. Skin biopsy demonstrated the leukocytoclastic vasculitis. She was administered metronidazole 1,500㎎ a day for the treatment of amebic colitis. Her hematochezia was improved, but the abdominal pain and purpura were not. The subsequent corticosteroid therapy improved her symptoms.

남ㆍ여 고교 축구선수들이 받는 스트레스 원인과 해소방법에 관한 연구

장재훈,부기원 강원대학교 체육과학연구소 2001 江原大學校附設體育科學硏究所論文集 Vol.- No.24

This research has the purpose of finding out the cause of stress which is inflicted on men · women soccer players in high schools. To turn out reliable calculations of average and standard deviation, I used the data collected through questionnaires which are answered by the total number of 472 soccer players(284 men in a high school, 188 women in a high school), and the conclusion was reached with the t-test for statistical verification. Among the cause of stress imposed on soccer players of man's high schools, the most stressful low-factor is when they lost the game, while among woman's high school soccer players, it is when they are despised by the others, and the least stressful factor is the problem with the other sex. The difference of the causes of stress classified by factors reveals that the athletics performance factor is the highest for both the groups of soccer players of women's high schools and colleges. The factor with the most meaningful difference between both the groups of women soccer players is before-competition factor(girl's high school: 2.48±.68, boy's high school: 2.14±1.17), with the meaningful difference at the level of t=-3.64, p<.001, and the rest of the factor don't make any meaningful difference. The stress-mitigating method which soccer players have chosen the most is thinking the matter over and over, but the lowest chosen by them is depending on smoking and drinking. The difference of stress-relieving methods classified by factors demonstrates that the clarification of the causes of stress is the highest factor for both the groups of soccer players. The factor with the most meaningful difference between both the groups is conversation(girl's high school: 2.06±.77, boy's high school: 1.79±.76), with the meaningful difference at the level of t=-3.670, p<.001, and the compensate factor is the next(girl's high school: 2.24±.82, boy's high school: 2.04±.77), with the meaningful difference at the level of t=-2.683, p<.009, and the physical factor is(girl's high school: 2.04±.61, boy's high school: 2.17±.60), with the meaningful difference at the level of t=2.373, p<.018. Therefore, the fact that boy soccer players get much of serious stress from the result of competition tells us that we should be more careful about our words and deeds in the field service. In addition, fear of failure acts greatly as the cause of stress, which requires a preventive alternative through psychological training. Finally, it is thought that it is necessary to make athletics performance ability maximized by making the most of healthy leisure hours.

제한된 Bin Packing Problem의 유전자알고리즘 해법

장재원,한치근 경희대학교 산학협력기술연구원 1998 산학협력기술연구논문집 Vol.4 No.-

The Bin Packing Problem is to minimize the numper of bins in which a set of items are inserted. The Constrained Bin Packing Problem(CBPP) has a constraint that no two items with the same attribute are packed to a bin. CBPP has been shown to be NP-Complete. To solve CBPP, in this paper, we try to find a near optimal soultion using Genetic Algorithm. But, when applying general Genetic Algorithm to CBPP, the solution may not satisfy the feasibility because genetic operators used to manipulate the chromosomes yield infeasible offsprings. Hence, to solve CBPP, we used a Repair Operator to generate feasible choromosomes in the algorithm.

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.

개에 발생한 만성 승모판폐쇄부전증에 대한 Pimobendan 치료 1례

장재임,전형규,최호정,이영원,송근호 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2006 動物醫科學硏究誌 Vol.14 No.-

A 11-year-old intact male maltese dog with respiratory distress, cyanosis and coughing was referred to the Veterinary Medical Teaching Hospital of Chungnam National University. Loud holosystolic murmur with a palpable precordial thrill was heard at the left apex region by auscultation. Left sided cardiac enlargement and mitral regurgitated flow were detected by thoracic radiography and echocardiography, respectively. Clinical signs were improved by treatment of diuretics, ACE inhibitor and pimobendan.

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.

數種의 熱處理方法이 Elgiloy矯正用 線材의 腐蝕에 미치는 影響

張世敬,權五源,成在鉉 慶北大學校 齒科大學 1987 慶北齒大論文集 Vol.4 No.1

The purpose of this study was to evaluate the effect of heat treatment on corrosion properties in .016 "Green Elgiloy wire. To evaluate the corrosion resistance of Elgiloy wire, electrochemical tests such as potential and polarization measurement were used widely. In this experiment, the corrosion currents were measured using electronic potentiostat and all of the heated specimen were heat-treated by direct flame, electric welder and dental furnace. These specimens were immersed in 1% sodium chloride solution at 37℃, and currents of each specimen were measured for 24 hours at 0.0 volt(SCE) The results were as follows: Heat-treated specimens showed higher corrosion susceptibility than non heat-treated specimens. Heat-treated specimens by direct flame seemed to be higher corrosion susceptibility than those by electric welder, dental furnace. Heat-treated specimens by direct flame showed higher current density and lower corrosion potentials in respect to heattreated specimens by electric welder, dental furnace. Corrosion surface of heat-treated specimens showed pits and scratches by observation of scanntng electron microscope.

인간 면역부전 바이러스(HIV) 감염자 사이에서의 1기 및 2기 매독의 유행

장희창,조재현,박완범,이기덕,이창섭,김홍빈,오명돈,최강원 대한감염학회 2004 감염과 화학요법 Vol.36 No.6

목적 : 국내 HIV 감염자 사이에서 발생한 매독의 유행을 보고하고, 그 역학적 특성을 규명하고자 하였다. 재료 및 방법 : 1999년 7월부터 2003년 9월까지 서울대학교 병원에서 추적 관찰을 받아온 HIV 감염자를 대상으로 하여 1기 및 2기 매독의 발생을 조사하였다. 발생률을 정확히 구하기 위해 추적 관찰을 받은 모든 HIV 감염자의 인년을 6개월 간격으로 구하였다. 결과 : 51개월 동안, 465명의 HIV 감염자가 서울대학교 병원에서 추적 관찰을 받았다. 이중 38명이 1기 및 2기 매독으로 진단되었다. 1기 및 2기 매독의 발생률은 이기간 동안 100인년 당 4.1명이었다. 1999년 7월부터 2001년 12월 사이에는 발생자가 없었으나, 이후 발생률은 꾸준히 증가하여 2003년 9월에는 100인년 당 18.8명이 되었다. 1기 및 2기 매독의 발생률은 동성애자 및 양성애자에서 이성애자에서보다 4.3배 높았고, HAART로 치료를 받지 않은 환자에서 HAART로 치료를 받고 있던 환자에서 보다 10.9배 높았다. 결론 : 2002년부터 국내 HIV 감염자 사이에서 1기 및 2기 매독이 유행하기 시작하였고, 이러한 유행은 동성애자와 양성애자 및 HAART로 치료를 받고 있지 않던 사람 사이에서 발생하였다. Background : This study was performed to characterize the epidemiologic and clinical features of outbreak of syphilis among HIV sero-positive patients in Korea. Materials and Methods : A retrospective case review of patients diagnosed with primary and secondary syphilis from July 1999 to September 2003 was carried out at Seoul National University Hospital in Korea. To estimate the incidence, person-years (PYs) of all HIV sero-positive patients, who visited the hospital in the same period, were calculated every 6 months. Results : In a 51 month period, 465 HIV-positive patients were followed up at Seoul National University Hospital. 38 cases of primary and secondary syphilis were diagnosed. The incidence of primary and secondary syphilis was 4.1 per 100 PYs during the study period. There was no case from July 1999 to December 2001, and then the incidence rose until September 2003 from 5.5 per 100 PYs in 1999 to 18.8 per 100 PYs in 2003. The rate of primary and secondary syphilis was 4.3 times higher among homosexual and bisexual men than heterosexual men (95% CI 1.87 to 11.17), and 10.9 times higher among patients who did not receive HAART than patients who were receiving HAART (95% CI 5.47 to 21.79). Conclusion : The outbreak of primary and secondary syphilis among HIV-positive patients started in 2002 and has been escalating, especially among homosexual/bisexual men and in patients who did not receive HAART.