분말충진방법과 가공정도에 따른 Ag/BSCCO 초전도선재의 특성

지봉기,김태우,김정호,김중석,주진호 成均館大學校 科學技術硏究所 1998 論文集 Vol.49 No.1

We evaluated the effects of processing variables on interface irregularity. microstructure. and resultant Jc of BSCCC superconductor tape. For the tapes made by PIT technique. the degree of interface irregularity was varied with powder packing methods and forming process variables. It was observed that the degree of interface irregularity of the tape by CIP method was more reduced. compared to that of the tape by ram method. In addition. the degree of interface irregularity was promoted with decreasing the dimension of tape during forming process. As the dimension of wire/tape were changed from diameter of 3.25mm to thickness of 200㎛ during forming process. Jc value was observed to be increased by 10 times. It was likely that the improvenment of Jc was mainly result from the enhanced texturing of 2223 grain. Microstructural investigation showed the degree of texturing was degraded by the existence of both second phases and interface irregularity. If the interface was flat, larger grain size and better texturing near interface were developed compared to those inside superconducting core, The improvements of microstructure near interface may be result of reaction between Ag and superconductor phase.

보리순의 영양성분 조성

서혜지,최용민,김상천,이준수,이기택,정명근,천지연,황진봉,남진식,서우덕,황영,김행란,김세나 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.2

뇌경색후 우울증에서 Homocysteine, Vitamin B12 및 Folate 혈청 농도와 관계

문지수,김광수,유봉구,김종국,김민정 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.1

Background and purpose : Poststroke depression is common and linked to poor prognosis and higher mortality after stroke. Previous studies suggest that high level of serum homocysteine and low levels of vitamin B12 and folate may cause depression. However previous studies has showed large variation concerning the influencing factors of poststroke depression. The purpose of this study was to evaluated the factor that influencing the poststroke depression including serum levels of homocysteine, vitamin B12 and folate. Methods : Beck depression inventory (BDI) was obtained in 62 patients with cerebral infarction, and the patients were divided into non-depression group (BDI ≤ 13) and depression group (BDI ? 14) according to their BDI scores. Then, we compared serum homocysteine, vitamin B12, folate, age, sex, Barthel index, Scandinavian stroke scale, acute aphasia screening protocol, Korean version of mini-mental state examination and ischemic brain lesion between NDG and DG. And also calculate the correlations between serum homocysteine, vitamin B12 and folate with severity of poststroke depression. Results : The NDG were 41 patients (66.1%) and DG were 21 patients (33.9%). Serum homocysteine, vitamine B12 and folate were not different between the groups, and these levels were not correlated with the severity of BDI. The age, sex, BI, SSS, AASP, K-MMSE and location of ischemic stroke were not different between the groups. Conclusion : Frequency of poststroke depression were high in patients with acute ischemic stroke. In contrast with previous studies, poststroke depression was not influenced by the serum levels of homocysteine, vitamin B12 and folate. And poststroke depression was not influenced by age, sex, physical handicap after stroke, aphasia, cognitive function and location of ischemic stroke.

대칭형 복사기 줌 렌즈계의 광학적 성능 분석

지택상 ; 박수봉 ; 김봉환 김천대학교 2001 김천대학교 논문집 Vol.22 No.-

We analyzed to calculate the optical capacity, after we chose the designed symmetric 3 group zoom copier lens system in this paper.

석면함유 슬레이트 지붕 물받이 퇴적물 중 석면 섬유 함유율

임지현,한솔민,김현석,신유민,박시은,허정윤,김민영,장봉기 순천향대학교 기초과학연구소 2022 순천향자연과학연구 논문집 Vol.28 No.1,2

This study attempted to determine the degree of asbestos release from the aging slate roof by comparing the asbestos content in the slate roof rain gutter with a colored steel plate (tin plate) over the slate roof. Four slate roof houses located in Haengmok-ri, Asan-si, Chungcheongnam-do, and one house constructed with a colored steel plate on the slate roof were selected to collect the sediment of the roof rain gutter. The asbestos fiber content was calculated by a point counting method using a polarization microscope after pretreatment with conversion treatment and hydrochloric acid treatment. The average asbestos content of the four slate roof rain gutter were 1.89%. However, asbestos was not detected in the Slate covering roof rain gutter, which were constructed on the slate roof. Asbestos fiber content was the highest at 2.89% in the slate roof rain gutter installed in 1976, followed by 2.44% in 1953. From the above results, it is necessary to minimize secondary damage as asbestos fibers released from slate roof houses to the surrounding atmosphere or leaked from slate roofs as rainwater may cause soil pollution and seriously affect residents' health. Although covering with colored steel plates (tin plates) has been shown to prevent the leakage of asbestos fibers to some extent, it is believed that a policy alternative to remove the slate roof as soon as possible is needed to solve the fundamental problem.

고등학교 학생들의 교사인식 분석

지봉환 韓國敎員大學校 敎育硏究院 2009 敎員敎育 Vol.25 No.3

교사는 학생을 전제로 의미를 부여받고 교사의 존재가치는 학생과의 관계 속에서 형성된다. 이에 따라 교사-학생 간 관계의 건강을 점검하는 것은 의미 있는 작업이다. 건강한 관계가 서로의 존재가치를 향상시킬 수 있기 때문이다. 교사와 학생은 서로 함께하는 환경 속에서만 존재할 수 있고 존재의미를 지닌다. 교사와 학생간의 건강한 관계가 요구되는 이유이다. 관계의 건강은 서로를 어떻게 판단하고 어떤 존재로 인식하느냐하는 문제와 관련된다. 이에 따라 본 연구는 교사에 대한 학생의 인식을 통해 양자관계의 건강을 점검하고자 하는 의도에서 이루어졌다. 이를 위해 교사에 대한 전통적 관점을 고찰하고,학생의 교사에 대한 기본적 인식과 그러한 인식이 형성된 맥락을 조사하였다. 특히 학생들이 생각하는 교사의 역할과 학생과의 바람직한 관계에 대해 살펴보았고 교사와 학생간의 관계가 부정적으로 형성되는 원인 등에 대해 알아보았다. 그 결과 교사의 역할로는 '학습을 도와주는 일’을 가장 중요하게 생각했으며,학생과의 관계는 '스승과 제자’를 바람직한 모델로 생각하고 있었다. 그리고 교사의 비인간적 행위와 교과에 대한 능력 부족을 바라보는 시각이 매우 부정적인 것으로 나타났다. 끝으로 이러한 교사에 대한 학생의 인식과 관련한 교육적 시사점을 논의하였다. Teachers are given meaning from students, and their values are formed with the relationship of students. Therefore, checking teacher-student relationship is a meaningful work. For good relationships improve values of each other. Teachers and students can exist only under the environment of going together and have existing meaning. This is why good teacher-student relationships are needed. A condition of a good teacher-student relationship is combined with a problem about judgement and recognition of each other. The aims of this study is to intend to check the condition of teacher-student relationships through students' recognition for teachers. To do this, I considered a traditional point of view about teachers and relationships between teachers and students. I also investigated carefully students' fundamental recognition about teachers and connection about formation of such recognition. Especially, I looked at the role of teachers, good relationships with students, and causes of forming negative relationships with others. As a result of this analysis, generally, students were affirmative to their teachers, but their negative point of view was also high. Particularly this study shows that the students' view about teachers is very negative when teachers do immoral acts and reveal their poor teaching ability. Finally, I dealt with educational implications for the cognition of students regarding such bad teachers.

동공을 침범한 당뇨병성 동안신경 마비

문지수,김민정,김종국,유봉구 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.1

Oculomotor nerve palsy of acute onset with sparing of the pupil in older age is frequently associated with diabetes mellitus. A 73-year-old diabetic woman was admitted because of vertical diplopia and gait disturbance. Neurological examination showed that the left eye had decreased light reflex, dilated pupil, and limited adduction, supraduction and infraduction. Brain MRI and MRA were unremarkable. Two months after onset, movement, pupil size and light reflex of the patient's eyes were normal on examination. It is emphasized that the diabetic ophthalmoplegia can involve the pupil. We report a rare case of diabetic oculomotor nerve palsy with pupil involvement.

소아에서 Fogarty 카테터를 이용한 일측폐 환기 마취 경험

유수봉,강효석,임지훈,김두식,류시정 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.3

Thoracic surgery may be greatly facilitated by causing selective atelectasis of the lung being operated on (one-lung ventilation anesthesia). But the tube used for one-lung ventilation is greater outer diameter than conventional endotracheal tube when compare to each other with same inner diameter, so in some young children it is impossible to one-lung ventilation using double lumen tube or bronchial blocker tube because of narrow vocal cord. We performed one lung ventilation anesthesia using conventional endotracheal tube and Fogarty catheter as a bronchial blocker in 11-year old women who received lung biopsy surgery and left lower lobectomy.

『흉내내는 사람들』에 나타난 모방과 혼종성

지봉근 한국현대영미소설학회 2002 현대영미소설 Vol.9 No.1

In the semi-autobiographical novel The Mimic Men V. S. Naipaul presents a colonial and postcolonial history and politics of Isabella, an embodiment of his native country the Republic of Trinidad and Tobago. In the novel the protagonist Singh spends his childhood in the colonized island Isabella, gets a college education in London the center of the British empire, leads a partly successful and partly failed politician's life after returning to the island. He goes into an exile after the failure in the management on postcolonial nation-building projects. In the process, he experiences a disturbed cultural and political identity in between the colonized and the colonizer. The postcolonial theoretician Bhabha's notion of mimicry and hybridity is a useful tool in considering the colonial and postcolonial national identity of Isabella. Bhabha suggests that mimicry as the colonized's partial imitation of the colonizer produces a hybrid identity of the colonized. The protagonist Singh is a hybrid in that he is a product of colonial education while he belongs to the colonized Isabella. This hybridity brings about the subversion to the colonial domination of the British empire and the postcolonial nation of Isabella is the product of this subversive hybridity. The national identity of Isabella is in a constant indeterminacy in between the continuing neocolonial domination of the former colonizer Britain and the struggle for the autonomy of the new nation

Photoacoustic Effects on Material-coated window

朴奉斗,尹志洪,韓聖愚 慶北大學校 産業開發硏究所 1979 硏究報告 Vol.7 No.-

Photoacoustic effect was studied with the air cell and tungsten lamp. The air cell had a material-coated window. As the coating material, one of the following materials was used; the lamp black, copper, nickel and aluminum. The incident light was chopped by the rotating disc, and entered through the material-coated window. The produced photoacoustic signal intensity is approximately inversely proportional to the chopping frequency. This effect was the same as that when the chopped light entered into the air cell from the opposite side, gas side. The signal intensity, however, was much smaller than that of tho light incident from the oppsite side. The photoacoustic signal intensity was varied with the thickness and kinds of coated material. In the case of aluminum the intensity was rapidly decreased when thickness increased. In the case of copper, however, the intensity was increased until the thickness increased to a certain value, and over this value the intensity was decreased slowly.