18 Ni 마르에이징 강의 기계적 성질에 미치는 Mo 첨가량의 영향

김학모,김인배,박세윤 ( Hak Mo Kim,In Bae Kim,Se Yoon Park ) 한국열처리공학회 1991 熱處理工學會誌 Vol.4 No.3

Effects of Mo content and aging conditions on the amount of retained austenite and mechanical properties of 18 Ni maraging steels were investigated. Maraging steels were fabricated with variation of Mo content, 3, 5, 7, 9% and heat treated by austenitizing at 840℃ for 1 hour and then aged at 480℃ for 0.5∼100 hours. It was found that the amount of retained austenite after aolution treatment was negligible up to 5% Mo. 8 and 11 volume percents of retained austenite were obtained with 7 and 9% Mo respectively. The maximum hardness and yield strength without great loss of impact toughness were attained in the range of 4∼8 hours of aging time at 480℃ with 5% Mo. It was concluded, as a result, that the optimum Mo content for the good combination of strength and toughness is to be 5% Mo.

AF 115 초합금중의 γ' 분리 및 분석방법

김영근,윤정모 한국부식학회 1989 Corrosion Science and Technology Vol.18 No.1

After extrating and separating γ phases and γ' phases from Ni-based super alloy AF115, which was manufactured by a powder metallurgical method, by a potentiostatic method and a galvanostatic method, the results acquired by observing the composition of each phase and the shape of precipitate phases are as follows; (1) A potentiostatic method and a galvanostatic method for the extraction and separation of γ' phases were all possible, but most stable γ' phases could be acquired in the electrolytic condition of 10mA by a galvanostatic method. (2) The ratio of the composition of γ and γ' phases analyzed by ICP is as follows. γ phase: Ni_(1.81) Co_(1.0) Cr_(1.01) Al_(0.14) Ti_(0.04) Mo_(0.13) W_(0.10) Nb γ' phase: (Ni_(2.71) Co_(0.19) Cr_(0.09) Mo_(0.03)) (A1_(0.22) Ti_(0.26) Co_(0.19) W_(0.24) Nb_(0.09)) (3) The results of X-ray diffraction test show that γ phases are NiAl and γ' phases are Ni₃ Al or Ni₃ (Al, Ti).

폐쇄성 수면무호흡 환자의 상기도 형태의 특징과 압력강하에 관한 3차원 전산유체역학해석

모성서,안형택,이정선,정유삼,문윤식,배응권,성상진 대한치과교정학회 2010 대한치과교정학회지 Vol.40 No.2

폐쇄성 수면무호흡(obstructive sleep apnea, OSA)은 수면 중에 반복적으로 상기도의 완전폐쇄나 부분폐쇄가 일어나는 질환으로서 흡기된 공기는 반드시 상기도라는 연조직 관(tube) 구조를 통과해야 하므로 상기도의 폐쇄경향은 관의 형태 및 관을 통과하는 공기의 유체역학적 특성에 따라서도 큰 영향을 받을 수 있다. 본 연구에서는 OSA 환자 3인의 치료 전 상기도 CT 이미지를 이용하여 개별화된 3차원 유한요소모델 A, B, C를 제작하고, 비공 당 170, 200, 230 ml/s의 흡기유량에 대하여 3차원 전산유체역학 해석을 시행하였다. 상기도의 유속, 음압 그리고 압력강하를 측정한 결과 관찰된 3개의 모델에서 모두 단면적이 가장 작은 부위에서 유속이 증가하였고, 음압이 크게 나타났다. 기도의 형태는 구개인두와 구인두 부위에서 좁아지는 형태를 가지며, 최소 단면적 영역과 하인두 단면적의 차이가 클수록 유속과 음압의 변화가 크게 나타났다. 비강 부위의 최고 압력과 최소 단면적 영역의 최저 압력의 차이를 의미하는 압력강하는 상기도 저항을 종합적으로 판단할 수 있는 유용한 지표이며, 유량에 따라 증가하였다. Objective: Obstructive sleep apnea (OSA) is a common disorder which is characterized by a recurrence of entire or partial collapse of the pharyngeal airway during sleep. A given tidal volume must traverse the soft tissue tube structure of the upper airway, so the tendency for airway obstruction is influenced by the geometries of the duct and characteristics of the airflow in respect to fluid dynamics. Methods: Individualized 3D FEA models were reconstructed from pretreatment computerized tomogram images of three patients with obstructive sleep apnea. 3D computational fluid dynamics analysis was used to observe the effect of airway geometry on the flow velocity, negative pressure and pressure drop in the upper airway at an inspiration flow rate of 170, 200, and 230 ml/s per nostril. Results: In all 3 models, large airflow velocity and negative pressure were observed around the section of minimum area (SMA), the region which narrows around the velopharynx and oropharynx. The bigger the Out-A (outlet area)/ SMA-A (SMA area) ratio, the greater was the change in airflow velocity and negative pressure. Conclusions: Pressure drop meaning the difference between highest pressure at nostril and lowest pressure at SMA, is a good indicator for upper airway resistance which increased more as the airflow volume was increased.

Reversed Gastric Tube 술식을 이용한 하인두 및 경부식도 재건술

김영모,조정일,박재웅,김철호,허윤석 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.2

21세기 삶의 질 향상을 위한 레크리에이션 운동에 관한 연구

김윤숙,이근모 釜山大學校 師範大學 1998 교사교육연구 Vol.35 No.-

As modern civilization advances very highly, our way of living is changing. In particular, industrialized society, which provides us with "increse of leisure time," has a strong effect on ethical and moral aspects of our life. In addition, it is regarded as a new research subject. Good use of leisure can save human deprivation and self alienation, but bad use of leisure will cause them. Therefore, in modern society, recreation, which plays a role in re-education for humanization, is getting more and more significant. Therefore, the purpose of this study was as follows : This study investigated the direction and task for activating recreational movement. For example, in the direction and task for activating recreational movement investigated to livelihood, organization, space, polity of recreation. And, It proposed task for activating recreational movement in field of servitude society, one's place of work, school, social welfare to progress Quality of Life in 21st Century.

사회학의 이론적 관점에 따른 레크리에이션 연구

김윤숙,이근모 釜山大學校 附設 體育科學硏究所 1998 體育科學硏究所 論文集 Vol.14 No.-

This study also shows that various recreational problems of modern society can be explained according to the basic principles of sociology such as functionalist point of view, political economics and critical theoretical point of view, symbolic interactions point of view, symbolic and linguistic point of view. To analysis recreation through theoretical aspect of sociology was as follows; 1. The functionalist point of view is that recreation contributes to the harmonious maintenance and operation of the social organization. 2. The political economics and critical theoretical point of view, a Marxist point of view criticise the tendencies of consumption-centered capitalist society. In their political apathy, people neglect the social problems for self satisfaction and family-based recreation. The critical theoretical point of view of the Frankfurt sect raises the question of whether recreation is free or not. 3. The symbolic interactions point of view is that recreation has different meanings according to is interpretation by the different perspectives of people in each era. 4. The symbolic and linguistic point of view is that it defines the ideological base of the recreational activities through analyzing its language and studies the recreational goods and services as a symbolic system.

고양이 중뇌 흑색질의 Dopamine 면역반응세포에 관한 면역세포화학적 연구

모근석,문정석,김종중,김준수,정윤영,장인엽,김흥중 대한해부학회 1996 Anatomy & Cell Biology Vol.29 No.5

사회제도와 레크리에이션의 관계에 관한 연구

김윤숙,이근모 釜山大學校 附設 體育科學硏究所 1998 體育科學硏究所 論文集 Vol.14 No.-

As modem civilization advances very highly, our way of living is changing. In particular, industrialized society, which provides us with "increase of leisure time", has a strong effect on ethical and moral aspects of our life. In addition, it is regarded as a new research subject. Good use of leisure can save human deprivation and self alienation, but bad use of leisure will cause them. Therefore, in modem society, recreation, which plays a role in re-education for humanization, is getting more and more significant. Recreation tendencies and problems of modem society are being mentioned in many different points of view. But there are few paper which have investigate recreational phenomena through sociological approaches. So this, as away of sociological study, aims at criticizing and analyzing the relationship between social regulations of politics, economy, culture, religion, ethic, recreation and goes to the conclusion that the recreation is a kind of social phenomenon.

흰쥐 뇌에서 Neuropeptide-Y 분비세포의 출현시기 및 발육에 관한 면역조직화학적 연구

모근석,김종중,정윤영,장인엽,문정석,김준수,김흥중 대한해부학회 1996 Anatomy & Cell Biology Vol.29 No.5

여성의 정체성 탐구 : 『제인에어』와 『광활한 사가소 바다』를 중심으로 with emplasis on Jane Eyre and Wide Sargasso Sea

김모경,윤영식 순천대학교 어학연구소 2001 어학연구 Vol.12 No.-

Bertha Mason is the alter ego of Jane Eyre who expresses her desire, rebellion, and rage in jane Eyre. She is established as a positive role model helping Hane not to lose her subjectivity in the male-oriented society. However, Charlotte Bront creates Bertha Mason as the indeterminate being of the boundary betwen human and animal, or subhuman being to escape the criticism from the contemporary society. Bront explores the constraints to women in the male-oriented ideology but social structure. But women can't be extricated themselves from the social system that oppresses women, unless the wrong ideologies are improved. In this respect, sh fails as a feminist. The work of Jean Rhys, Wide Sargasso Sea, helps to reveal how Rochester, the central figure of the male-oriented ideology, oppresses Antoinette and rids her of the identity of gerself. Antoinette is a Creole, a white woman in England's colony, Jamaica. So she experiences the double isolation in both her lower rank and her poverty. Besides, her mother, Annette, being accustomed to the patriarchy, is eager to belong to the white society through the marriage with the Englishman Mason to get out of poverty. However, her desires drive her to despairs and wventually to death. At last, Annette is sacrificed by the colonial and commercial materialism and the male-oriented ideologies. Her daughter, Antoinette repeats her mother's misfortune and forms the vicious circle. In the resrlt, the daughter's misfortune is transmitted from gers. And so mother's life reflects in her daughter. Bront establishes Jane Eyre as an orphan. Bront intends to enable Jane to marry Rochester in the higher rank and to be a member of the family in the higher calss. Bront always lays Jane in th counter family situation, so she wants her to move from the counter family to the family in law. As a result of it, Bront shows the double structures. Helen's noble religious spirit and Miss Temple's maternal love have influence on her establishment of identity and mental development. Qnd Jane enjoys the mutual understanding with cousins, Diana and Mary. Christophine in Wide Sargasso Sea helps Antoinette recover the identity. She has not only the capacity to realize her reality, but her economic independence and self-reliance. I'm sure she is a true feminist. Therefore, women's mental sympathy helps women to find their identities. Rochester, who enjoys the male-dominated culture and colonial value, is used to thinking Antoinette her as the outsider, marginalizing her, destrying her identity, and dehumanizing her. However, at length she realizes her identity and expresses her repressed rage by madness. Jean Rhys symboizes Antoinette's dream as the world free from the patriarchal oppression of the amle-dominated society and represents her realities. Antoinette gains the inner power to realize her identity through her dream shower her oppressed rage through madness. Her third dream suggests the solutions to find out who she is, why she comes here and what she has to do now. She flies to the world free from pooression of patriarchy by expressing her anger through burning Thornfield. Both Jane and Antoinette experience the pooression from the patriarchy of male-dominated society, and then find their identities in the male-dominant ideologies' society. If women construct their identities, they will be able to achieve the true mutual equality between men and women more easily.