• 소성∙가공
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• 제13권5호
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• pp.429-434
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• 2004

Manufacturing process for milli components has recently gained researcher's focus with the increasing tendency toward highly integrated and micro-scaled parts for electronic devices. The milli-components need more precise manufacturing process than the conventional manufacturing process since the parts require higher dimensional accuracy than the conventional ones. In order to enhance the forming accuracy and productivity, various forming procedures proposed and studied by many researchers. In this paper, forming analysis of milli-components has been studied with a new micro-former. In modeling of progressive dies, multi-stage forming sequence has been analyzed with finite element analysis by LS-DYNA3D. The analysis proposes the sequential die and part shapes with the corresponding punch force and dimensional accuracy. The analysis also considers the effect of elastic dies on the dimensional accuracy of the formed parts. The analysis result demonstrates that the elastic analysis in the milli-forming process is indispensable for accurate forming analysis. The analysis procedure in the paper will provide good information in design of a new micro-former and milli-component

• 영어영문학
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• 제56권4호
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• pp.719-751
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• 2010

While Lukacs advocated the progressive effect that Darwin's evolutionary theory had on Goethe and Balzac, he was convinced that the "influences of Nietzsche, Freud, or Spengler on the writers" of his own time were "devastating." He maintains that to the "'vacuous' reality" of bourgeois life, "the bourgeois writer counterposes 'the life of the soul,' which is 'alone decisive.' This life of the soul then becomes the centre of gravity, and sometimes the sole content of his portrayal." Naming this creative tendency psychologism, he warns against the danger of "depicting only the 'inner life,' and carrying on a more or less conscious education in the direction of political and social indifferentism, of ignoring and pushing aside the 'inessential,' 'external' struggles of the world, in favour of the 'life of the soul,' which is all that matters." However, Frantz Fanon's analysis of the psychology of the colonized in Black Skin, White Masks displays that after all, "the life of the soul" cannot be separated from the "external' struggles of the world." Pat Barker's Regeneration Trilogy, which criticizes the conduct of World War I by British leaders and the British society in general with its patriarchal, gender, and class repression by depicting the psychopathology of the shell shock victims of the same war amply shows the possibility of portraying the "external struggles of the world" through the in-depth probing into "the life of the soul" and finding political and social relevance in the process.

• 한국방사선학회논문지
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• 제11권6호
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• pp.483-491
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• 2017

본 연구는 일반인을 대상으로 시대성이 반영된 각종 잠재적 위험요소와 원자력(방사선)발전의 위험성 대한 인식을 분석하였다. 설문 대상은 다양한 계층으로 하고 그 중에 총 293부를 분석하였다. 그 결과, 잠재적 위험요소 중에서 화재에 대한 위험도 인식이 높게 나타났으며, 다음으로 방사선 테러와 핵(원자력)에너지의 위험도를 다른 위험요소들에 비해 비교적 높게 인식하였다. 연령별, 학력별, 정치 이념 성향에 따른 분석에서 원자력발전의 필요성과 위험성, 안전성에 대해서 상반된 결과를 나타내었다. 정치이념의 성향에 따른 잠재적 위험요소와 원자력발전에 대한 인식은 보수적 이념집단에서 긍정적인 인식을, 진보적 집단에서는 부정적인 인식을 하고 있는 것으로 나타났다. 즉, 정치 이념의 성향에 따라 원자력발전 인식 분석에서 통계적 차이를 보였다. 따라서 원자력(방사선)발전 정책 방향 설정과 방사선 이용 관련 산업에 있어서 전문가 의견과 일반인의 다양한 의견을 반영해서 결정되어져야 할 것으로 판단되고, 일반인도 사실을 바탕으로 객관적이고 과학적인 근거에 입각해 각종 잠재적 위험과 원자력(방사선)에 대해 막연한 불안감을 가지지 말고 유연한 대처를 할 필요가 있다고 판단된다.

• Journal of Preventive Medicine and Public Health
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• 제9권1호
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• pp.11-24
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• 1976

This study was a part of large scale of a prospective study on attitudes of professional students in medicine, nursing and teaching toward population related issues in Korea. The study was first conducted in May 1974 and then in May 1975 for the 1974 class cohot using a questionaire consisted of attitude scales and other items developed by Lee. The purpose of stuay was twohold, namely, to determine the difference in students among specializations on one hand and between the first and second years in the 1974 class cohot regarding tile subject matter. A one-way analysis of variance was used for attitude scale, and absolute and relative frequency were computed for the analysis of non-attitude scale items by employing Fishers' Ratio and Duncan's multiple range test at 5% level and chi square test at 5% level as significance tests. The hypothesis 'students in health profession are more likely to have positive attitudes toward population related issues progressively as class year advances than students in teaching profession' was tested and the following results were obtained: 1) Nursing students were more likely to display favarable attitudes toward family planning than medical or teaching students although the class cohot showed slightly negative improvement in the second year. Medical and teaching students apperaed to have slightly improved attitudes in the second year. 2) Respondents in general perceived national family planning program as a means of population control and this tendency was more true among nursing students as the class year advances than two other professional groups of students. Students in teaching profession appeared to perceive it more as a means to improve individual family welfare while health students were likely to see as to improve maternal and child health. This tendency was progressively improved as the class year advanced. 3) The majority of students regardless of their respective specializations believed that family planning program should be directed toward the improvement of individual family welfare. No progressive changes in the class cohot were observed. 4) About the plan to use contraceptives in future, no singnificant differences were observes among different specializations nor in different class years. However, the majority was confirmed to have a plan to use contracepives in future. An increasing proportion of the undecided category was observed, as class year advanced among health students. 5) Students in health profession were found to be more favorable about 'more leisure opportunities' as motive for limiting number of children whereas education students indicated the reasons as 'facilitate ambitions' and 'economic base' The progressive changes toward positive direction in both groups were observed as the class years advanced. 6) Attitudes toward induced abortions of the health students were observed to be positively related to class years while an inverse relationship was found in teaching students who showed much less favor in the subject matter than health students. This phenomenon may be due to the different exposure to learning environments unique to respective specializations. 7) Health students were found to have more favorable attitudes toward population education in general than the teaching students. The teaching students appeared to have changed more to the negative direction when they became the second year while no such development was observed in health students. The teaching students seemed to hold a very conservative position with regard to sex education in schools. 8) About the equality of sexes, the nursing group was found to be most favorable while the reverse was true in the teaching group. A change in the negative direction as the class year advanced was found in the teaching group. 9) About questions related to fertility values-the 10 percent of respondents regardless of specialization indicated that they would maintain their single status in future, however no change was observed in the second year. The desired number of children was found to be two by the majority of students in nursing, medicine and teaching in order of high proportion. No changes in a different class year were observed. The childless marriage was seen by nursing students as a problem more than other students, but a slight change in positive direction was found when the nursing students became the second year. In summing, as data supported in the above, students in health profession demonstrated more favorable attitudes toward population related issues than the teaching students and this tendency became more apparent in the second year. It was noticed that health students were more conscious about the health aspect of population and family planning program while the teaching students gave more attention to the socioeconomic aspect. The sex variable seemed to have operated in the item related to the equality of sexes. In conclusion, as data presented in the above, the hypothesis of this study was accepted except in the few items. It should be noted that the limitation of this study is the short duration of the observation in measuring the possible attitude changes. It should include curriculum analysis for the respective specializations in order to indentify the area of curriculum impact on students in future study.

• 한국환경교육학회지:환경교육
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• 제3권1호
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• pp.55-62
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• 1992

In the orient, ancestor's perception to natural environment was related on the change of climate. Man had been a essence of the warm blood animal, which had suited in mild climate for living and acting. The weather of hot or cold was not only comfort in human life but influences negatively on human behavior. The most people of oriental was particularly interrelated to seasonal change of climate in earlier time. Because, there are elements such as temperature, humidity and wind in the category of climate, these elements differentiated seasonal change. The main methods of perception of natural environment were observed and classified. Although these methods were in the primitive stage, these coincided the tendency of modern science. For example, confucian was recognized the law of vertical air current that warm air rised and cold air sinked. And they could classify all elements nature based on the principles of 'Yin and Yang(陰陽論)' such as male and female, the sun and moon. shade and light etc. Thus results of the observation and the classification concerned with physical environment can be utilize a wisdom for progressive life of inhabitants. It was a origin of the education in natural environment. Commonness in the viewpoint of environment in the orient if recognized the law of circulation. Buddhism, originated in india, realized that all of phenomena in the world was changed slowly through the principles of cycle(輪廻說) such as male and female, the sun and moon, shade and light etc. Thus results of the observation and the classification concerned with physical environment can be utilized a wisdom for progressive life of inhabitants. It was a origin of the education in natural environment. Commonness in the viewpoint of environment in the orient if recognized the law of circulation. Buddhism, originated in India, realized that all of phenomena in the world was changed slowly through the principles of cycle(輪廻說). For example, whole of land is shifted from young stage to old stage as the life cycle of humanbeing. The theory of karma effects(葉報設) is so signify with the good result that good one's action is reap a sweet fruit. The most environmental problem in today must realized as a consequence of men's act. Then Taoism emphasized the pure nature without the artificiality. Because complexual environment was composed of several elements, It was maintained through the artificiality. Because complexual environment was composed of several elements, It was maintained through the interaction of cause and effects. The solution of environmental problem is maintenanced the harmony between cause and effects by a philosophical concept.

• Journal of Chest Surgery
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• 제13권2호
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• pp.85-91
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• 1980

Extracorporeal circulation by hemodilution technique has been currently used with its clinical safety and good peripheral tissue perfusion in open heart surgery. There is no doubt that $O_{2}$ carrying capacity of the blood is disturbed by decreased hemoglobin level resulting from hemodilution of the circulating blood. From the view point of the blood gas exchange, these experimental studies were undertaken to determined the sate limit of hemodilution in the condition of cardiopulmonary bypass with a constant perfusion flow rate. Twelve adult mongrel dogs weighing 10 to 13 Kg. were anesthetized with pentobarbital and then respiration was controlled with Harvard volume respirator using room air. The cardiopulmonary by pass was performed by use of Sarns heart lung machine (console 5000, 5 head and 2 roller pumps) and Travenol pediatric bubble oxygenator. The perfusion rate during bypass was maintained at a constant rate of 80 ml/min/Kg of body weight. The ratio of oxygen gas flow to blood flow was kept in 3 to 1 constantly. International hemodilution was attained by serial blood withdrawals and immediate infusion of equal volumes of diluants composed of Ringer's lactate, 5% dextrose in water and 25% mannitol solution, proportionally 60%, 30%, and 10%. Arterial and venous blood samples were obtained between 15 and 20 minutes following each hemodilution. Hematocrits and hemoglobin values, $PO_{2}$, $PCO_{2}$ and pH were measured. Oxygen and carbon dioxide contents oxygen consumption and carbon dioxide elimination were calculated groups according to different hematocrit values and the correlations were evaluated. Result were as follows. 1. the arterial $O_{2}$ tension and $O_{2}$ saturation were maintained at the physiological level irrespective of the hematocrit value. 2. The venous $O_{2}$ tension and $O_{2}$ saturation showed a tendency to decline with the decrease in hematocrit value and positive correlation between them (r = +0.49, r = +0.76), The mean values of venous $O_{2}$ tension and $O_{2}$ saturation, however, were not decreased when the hematocrit levels were lower than 20%. 3. The arterial $O_{2}$ content declined lineally in proportion to the fall of hematocrit level with a positive correlation between them (r = +0.95). 4. The venous $O_{2}$ contents were decreased gradually as the hematocrit value decreased with positive correlation between them ( r =+0.89). The trend of diminution of venous $O_{2}$ content, however, was became low according to progressive decrease of hematocrit level. 5. Systemic oxygen consumption was in higher range than $O_{2}$ requirement of basal metabolism when the hematocrit value was above 20%, but abruptly decreased when the hematocrit value became to below 20%. 6. The arterial $CO_{2}$ tension and $CO_{2}$ content showed trend of increasing with progressive decrease of hematocrit value but exhibited a rather broad range and there was no relationship between those value and the hematocrit value. 7. The venous $CO_{2}$ tension and $CO_{2}$ content have also no correlation with change of Ht. value but related directly to those value of arterial blood with positive correlation between them (r = +0.78, r = +0.95_. 8. A-V difference of $CO_{2}$ content and $CO_{2}$ elimination wasnot significantly influenced by Ht. value. From the results, we obtained that feasible limit in inteneional hemodilution is above the hematocrit value of 20% under the given experimental condition.

• 한국콘텐츠학회논문지
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• 제20권8호
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• pp.19-33
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• 2020

본 연구의 목적은 빅데이터 분석 기법을 이용하여 세종시 건설 계획에 대한 여론 변화를 분석하는 것이다. 연구 자료는 세종시 건설 계획과 관련된 한겨레와 동아일보, 한국일보 등 언론사의 신문기사이다. 세종시 건설 계획은 신행정수도, 행정중심복합도시, 세종시 수정안 등 3개 시기로 구분되었다. 분석 방법은 파이썬과 Gephi 0.9.2 프로그램을 활용한 빈도분석, 감성분석, 사회연결망분석이다. 세종시 건설에 따라 각 신문사의 쟁점에 대한 변화가 있었다. 첫째, 빈도분석 결과, 한겨레의 키워드는 세종시 건설 시기에 따라 찬성-찬성-반대의 특성을 나타내고 있었다. 동아일보는 반대-반대-찬성의 입장을 갖는 것으로 분석되었다. 한국일보는 반대-찬성-반대 경향을 갖는 것으로 분석되었다. 둘째, 감성분석 결과, 각 언론사는 논조의 특성이 변화되고 있었다. 한겨레는 긍정-긍정-부정 논조 특성을 보이고 있었고, 동아일보는 부정 - 부정 - 긍정으로 변화되었다. 한국일보는 부정-긍정-부정으로 변화되었다. 셋째, 사회연결망분석 결과는 다음과 같다. 각 언론사는 세종시 건설 시기에 진보와 보수, 중도 등 정치적, 이념적 특성에 따라 변화를 보이고 있었다. 한겨레는 지역균형발전에 초점을 맞추고 있었으며, 동아일보는 보수의 의견을 대변하고 있었다. 한국일보는 세종시 건설 시기에 여·야가 대립하는 이슈에 대해 부각 시키고 있었다.

• 한국산학기술학회논문지
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• 제21권2호
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• pp.205-211
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• 2020

많은 대중들은 가수 신해철에 대해 음악프로듀서, 싱어송라이터, 작곡가 등 다양한 음악적 활동을 했던 뮤지션으로 알고 있다. 그러나 그는 그 외에도 각종 대중매체에 다 방면으로 활발한 활동을 했던 전 방위적인 엔터테이너이기도 하다. 그의 음악적인 성향은 매우 진보적이며, 다양한 시도와 실험적인 퓨전 스타일의 음악을 지향한다. 그의 앨범 중 '모노크롬'은 독특한 테크노 음악과 전통음악을 접목한 결과물로 새로운 사운드를 향한 음악적인 가치와 의미에서 한국대중음악의 수준을 한 차원 끌어 올렸다는 평가를 받고 있다. 본 앨범에서 국악의 비중은 매우 높다. 꽹과리, 장구, 징 등 사물놀이 전통악기뿐만 아니라, 대금, 태평소, 품바, 타령 등을 사용, 기존 국악과의 협업을 통해 보다 진보된 확장성 있는 크로스오버 음악을 보여주고 있다. 현재 'K-Pop'이 세계적인 음악으로 계속 사랑받기 위해서는 음악적인 확장성을 기반을 둔 새로운 시도가 무엇보다 필요하다고 본다. 그렇기 때문에 모노크롬 앨범에서처럼 국악을 음악적 기재(器財)로 사용한다면, 차별성을 둔 우리만의 음악을 만들 수 있으며, 그로 인해 세계적으로 높은 'K-Pop'의 관심도 지속될 수 있을 것이라고 생각한다.

• 대한수의학회지
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• 제43권1호
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• pp.31-39
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• 2003

We have investigated the effect of extracellular $Mg^{2+}$ ($[Mg^2+]_o$) on action potential duration (APD) in guinea pig papillary muscles by using microelectrodes. Increasing $[Mg^2+]_o$ resulted in progressive negative inotropic effect, progressive ascending depolarization of membrane potential, and increase in intracellular $Mg^{2+}$ concentration. In addition, increase in $[Mg^2+]_o$ from 1.1 to 3, 6, 10, and 20 mM produced a reversible dose-dependent shortening of both APD at 30% ($APD_{30}$) and 90% repolarization ($APD_{90}$), especially showing a tendency towards more remarkable prominent shortening in $APD_{30}$ than $APD_{90}$. Cooling from 37 to 33 and $27^{\circ}C$ diminished the $[Mg^2+]_o$-induced APD shortening. Increase in extracellular $Ca^{2+}$ concentration from 1.8 to 3.6 and 5.4 mM caused a significant depressed effect on the increasing $[Mg^2+]_o$-induced APD shortening. Furthermore, increase in $[Mg^2+]_o$ from 1.1 to 10 and 20 mM produced a significant depressed effect on the APD shortening induced by extracellular $Ca^{2+}$. Pretreatment of verapamil and imipramine significantly attenuated the increasing $[Mg^2+]_o$-induced APD shortening in both $APD_{30}$ and $APD_{90}$, whereas the $[Mg^2+]_o$-induced APD shortening was not affected by strophanthidin, glibenclamide and tetrabutylammonium. These findings suggest that the effects of $[Mg^2+]_o$ on APD are probably due to a decrease in ionic transport across plasma membrane. In conclusion, the present study indicates that $[Mg^2+]_o$ exerts antiarrhythmic activities by antagonistic actions on intracellular $Ca^{2+}$.

• 인지과학
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• 제30권3호
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• pp.105-132
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• 2019

본 연구에서는 광복 이후 한국의 대통령의 연설문을 정량적으로 분석하였다. 기존의 글에 대한 정량적 분석인 내용분석 연구들이 내용어에 집중해 글쓴이의 생각을 분석한 것과는 다르게, 본 연구는 기능어와 심리적 상태와 관련된 내용어의 사용비율을 토대로 대통령의 생각을 분석하였다. 이를 위해, 다양한 대상과 집단을 대상으로 한 기존 언어분석 연구와 마찬가지로, 심리적이고 언어적인 변인들을 지표화하여 대통령의 연설문을 비교하였다. 연구 1에서는 영향력, 진정성, 대통령다움, 인지적 복잡성, 여성성, 심리적 건강 등 6개의 언어스타일 지표를 개발하였다. 역대 대통령 8인의 공식 연설문을 비교 분석한 결과, 대통령 언어스타일 지표 모두에서 대통령 간의 차이가 유의미하였다. 또한, 최근 대통령으로 올수록 연설문에서 진정성, 대통령다움, 심리적 건강은 증가하는 경향이 있고, 인지적 복잡성은 감소하는 경향이 관찰되었다. 재임시대를 구분하여 언어스타일의 변화를 추세 분석한 결과 선형추세가 유의미하였다. 또한, 정치적 성향에 따라서도 언어스타일에 있어서 뚜렷한 차이가 관찰됐다. 진보 성향 대통령의 연설문에서는 영향력과 인지적 복잡성이 높았고, 더 여성적인 언어가 상대적으로 더 많이 사용되었다. 반면, 보수 성향 대통령의 연설문에서는 진정성이 높았고, 더 대통령다운 표현이 많이 사용되었다. 연구 2에서는 개발된 언어스타일 지표가 직전인 박근혜 대통령의 연설문에서도 신뢰도를 유지하는지 여부를 관찰했다. 마지막으로 언어스타일 지표 간의 상관 특성, 2000년대 이후 정권과 일반 대중의 정치적 성향의 적합성, 본 연구의 지표인 여성성의 특성을 논의하였다.