40세 이하 관상동맥 질환자에서 장기적 임상 관찰

이승욱,정명호,박종철,박형욱,조상희,김원,김계훈,이상현,강경태,조장현,김남호,김건형,안영근,조정관,박종춘,강정채 全南大醫大 2001 전남의대학술지 Vol.37 No.2

社會科의 成就度와 民主市民意識과의 關係

조현걸,추정훈 金烏工科大學校 1993 論文集 Vol.14 No.-

This study is tried for the purpose of inquiring about relation of achievement level of social studies(political part) in high school to democratic citizenship. We expect that it will contribute a basis to building of contents and goal-study of current social studies under the system of enterance-examination. Hypotheses of this study are as follows. Hypothesis 1 : The higher achievement of social studies is the higher democratic citizenship is. Hypothesis 2 : If the same achievement, level of democratic citizenship of girl-students will be higher than that of boy-students. In order to test these hypotheses. We sampled 98 students in A high school purposively, surveyed through questionnaire, analyzed date by spss/pc. In result, <hypothesis 1> is supported(p=0.0001) and <hypothesis 2> is rejected(p=0.106).

교합면 열구 법랑질의 미세구조 및 산부식 형태

조태식,이상호,윤정훈,김수관 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.2

치면열구전색제의 접착력에 영향을 줄 수 있는 교합면 열구 법랑질의 미세구조 및 산부식 형태, 그리고 산부식 형태에 영향을 줄 수 있는 prismless enamel의 존재 여부 및 법랑질의 화학적 조성을 규명하고자 소구치를 대상으로 협설면과 근원심으로 각각 절단하여 열구내의 법랑질 표면과 산부식 형태를 주사전자현미경으로 관찰하고 EDX를 사용하여 법랑질의 화학적 조성을 분석한 결과 다음과 같은 결과를 얻었다. 1. 열구내 법랑질은 대부분이 prismless enamel이 존재하였다. 2. 미성숙 영구치와 성숙된 영구치 간의 열구내 법랑질 표면 구조 및 산부식 형태는 차이가 없었다. 3. 열구 법랑질은 부위 에 관계없이 60초 산부식 이 15초, 30초, 45초에 비해 산부식 효과가 가장 켰으며 15초, 30초, 45초의 산부식 시간에서는 적절한 유지력을 얻을 수 있는 산부식 상이 관찰되지 않았다. 4. 열구 법랑질의 표면을 기계적으로 제거한 경우는 30초의 산부식 시간에서도 60초 산부식 시간에 못지않은 전형적 인 산부식 상이 관찰되었다. 5. 산부식 형태는 주로 rod 주위가 소실된 제 2형의 산부식 상이 관찰되었다. 6. 열구 내 법랑질의 부위별 화학적 조성의 차이는 없었으나 미성숙 영구치와 성숙된 영구치 사이의 칼슘/인 비는 유의한 차이를 보였다. 이상의 연구결과를 종합하면 교합면 열구내 법랑질은 대부분 산에 저항성이 큰 prismless enamel로 덮여 있어 기존에 제안된 15-30초의 산부식 시간으로는 적절한 유지력을 얻을 수 있는 산부식 상을 형성할 수 없다는 사실을 알 수 있다. 따라서 기존의 제안된 산부식 시간에 대한 재고가 필요하며 이와 함께 적절한 산부식 상을 얻기 위한 방안으로 산부식 전bur를 사용하여 열구내 법랑질 표면을 제거해 주는 보조적인 술식에 대한 검토가 필요하리 라 사료된다. The purpose of this study was to compare the effectiveness of mechanical and acid treatment on enamel surfaces for the retention of pit and fissure sealants and evaluate the presence of a prismless layer. The etch pattern produced on enamel from immature and mature premolar teeth extracted with varying period of acid etching using 37% phosphoric acid was examined using a scanning electron microscope(SEM). The composition of each groups was evaluated using an energy dispersive x-ray(EDX) spectroscopy. The result of present study can be summarized as follows: 1. Prismless layer was commonly observed on the fissure enamel in young and mature premolar. 2. There were no differences in micro-structure and etching pattern on fissure enamel between the young and the mature premolar. 3. The most effective etching pattern for retention of pit and fissure sealant was observed in 60 seconds of etching time and no apparent difference of etching pattern was found among 15, 30, and 45 seconds of etching time which showed non-retentive etching patterns. 4. The etching pattern obtained by grinding enamel surface with bur followed by 60 seconds of etching was similar to that of 60 seconds of etching without any pretreatment of fissure surface. 5. Type 2 etching pattern was commonly found on fissure enamel in both young and mature premolar. 6. The calcium content and P/Ca ratio in fissure enamel between the young and the mature premolar were significantly different(PK0.05). But content of calcium, phosphate and P/Ca ratio on various regions of fissure enamel in both young and mature premolar did not showed any difference. Based on these results, prismless layer may negatively influence the retention of pit and fissure sealants. 'Therefore, the mechanical removal of the prismless layer by grinding prior to etching or by prolonged etching time of enamel within the fissure system should result in an improved bonding of a pit and fissure sealant.

도시하천 악취물질의 발생원조사에 대한 연구

조정구,배병훈,최금찬,임경택 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

This study has been carried out to investigate odor characteristics and removal methods on the water quality and sulfuric material of four urban sewage. The results from these experiments are as followings ; 1. For sediment, N contents(%) was shown 0.068mg/l at S-1, 0.109mg/l at S-2, 0.043mg/l at S-3, 1.233mg/l at S-4 and S contents(mg/g) was shown 2.192mg/l at S-1, 2.410mgA at S-2, 1.564mg/l at S-3, 15.146mg/l at S-4. The sample of S-4 was indicated the worst value to 1.233mg/l 2. NH₃, one of the representative odor materials, which was showed the highest value at S-1 in the water, showed the highest value at the S-4 in the air. It means that the cause of odor comes from the disintegration of sediment orgamisms, which has more important effect than the water pollution. 3. To control the odor materials, it is desirable to minimizes the inflow of sewage from pollutant source itself. One of the considering odor method is H₂O₂ or activated carbon input into the sewage, which has several advantages as chemical treatment of odor materials is to be desirable.

상박신경총에 발생한 Granular Cell Myoblastoma 1예 보고

조순구,이기찬,이훈갑,주정화 대한신경외과학회 1980 Journal of Korean neurosurgical society Vol.9 No.2

Granular cell myoblastoma is an uncommon tumor occurring on the skin as a single nodule. The tumor are generally small, the usual size being 0.5 to 2cm in diameter. Its rate of growth is usually slow. It is found in nearly equal distribution in men and women and is most common in the third to fifth decade of life. This is a case report of a 37-year-old woman with solitary nodular mass on right brachial plexus. The histopathology of the lesion revealed the pale cytoplasm filling with characteristic granules. Nerve bundles are often seen among or adjacent to the tumor cells. The histogenesis of this tumor is still disputed but the most accepted theory today is the neural derivation. The treatment of choice is surgical excision.

Li 첨가된 Polyanilines의 특성

조정환,허재훈,이미정 고신대학교 자연과학연구소 1999 고신대학교 자연과학연구소 논문집 Vol.9 No.-

Li doped polyaniline salts were prepared both by the chemical method and by the potentiodynamic method in the solution containing LiCl + HCl and aniline monomers. Li doping into polyanilines was confirmed by IR spectroscopic measurements. The UV characteristics and solubilities of LiCl doped polyaniline salt solutions were also investigated in several organic solvents.

병원 처방전달체계의 구축에 관한 연구

엄종훈,조정현,김승호 경북대학교 산업기술연구소 1991 産業技術硏究誌 Vol.19 No.-

This paper proposes the process of implementation of the hospital order communication system. We also discuss the object, effect and practice of implementation.

반건식-백필터에 의한 소각배가스 중의 HCI, SOx 제거 (Ⅱ)

배병훈,신남철,조정구,문종익,임경택 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.2

A combination of process modification and various additives to a lime-based spray-dryer/fabric-filter system was evaluated for its value in promoting sorbent utilization and simultaneous removal of HC1 and SO₂ from waste incineration flue gas. The variety of operating conditions were tested to evaluate important factors such as spray drying reactor(SDR) outlet temperature, retention time, molar equivalence ratio( MER ), fabric filter velocity, etc. For the sorbent activity enhancement, additives such as KmnO₄, NaOH, NaHCO₃, CaCl₂, a mixture of NaOH and CaCl₂ were added to Ca(OH)₂ at optimum operating condition. The mixture of NaOH and CaCl₂ ( 2 : 1 by weight ) was found to be the best economic additive. When that additive, 10% of Ca(OH)₂ by weight, was added, under the condition of Ca(OH)₂ of MER 1.0, HCl/SO₂ removal efficiencies at fabric filter were 98.3% and 97.1%, respectively.

二次 函數 Qc(χ) = χ²+ c의 混沌

한정훈,양승갑,조성훈 명지대학교 자연과학연구소 1995 자연과학논문집 Vol.12 No.-

본 논문의 목적은 이차함수 Qc(χ)=χ²+c 에 관한 주기점들의 주기적 성질을 연구하는데 있다.특히 c<-2일때 주기검의 형태를 연구하였고, 실제로 혼돈역학계를 설명하여 이차함수 Qc(χ)=χ²+c의 주기점들의 움직임이 혼돈역학계를 이루고 있음을 보였다. The purpose of this paper is to study of the periodic properties of the periodic points of the quadratic function Qc(χ)=χ²+c. In particular, we investigate the forms of the periodic points whenever c<-2.Actually, we describe the chaotic dynamical systems and show that the behavior of the periodic points of the quadratic function Qc(χ)=χ²+c(c<-2)is the chaotic dynamic systems.

소아 양성 발작성 어지럼증과 소아 편두통성 어지럼증의 비교

정연훈,조민정,최호석,이승주,이진석,전정민,백성수 대한평형의학회 2003 Research in Vestibular Science Vol.2 No.2