• Journal of the Korean Statistical Society
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• 제33권1호
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• pp.79-97
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• 2004

We propose a permutation approach to the classic Behrens-Fisher problem of comparing two means in the presence of unequal variances. It is motivated by the observation that a paired test is valid whether or not the variances are equal. Rather than using a single arbitrary pairing of the data, we average over all possible pairings. We do this in both a parametric and nonparametric setting. When the sample sizes are equal, the parametric version is equivalent to referral of the unpaired t-statistic to a t-table with half the usual degrees of freedom. The derivation provides an interesting representation of the unpaired t-statistic in terms of all possible pairwise t-statistics. The nonparametric version uses the same idea of considering all different pairings of data from the two groups, but applies it to a permutation test setting. Each pairing gives rise to a permutation distribution obtained by relabeling treatment and control within pairs. The totality of different mean differences across all possible pairings and relabelings forms the null distribution upon which the p-value is based. The conservatism of this procedure diminishes as the disparity in variances increases, disappearing completely when the ratio of the smaller to larger variance approaches 0. The nonparametric procedure behaves increasingly like a paired t-test as the sample sizes increase.

• 한국진공학회:학술대회논문집
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• 한국진공학회 1999년도 제17회 학술발표회 논문개요집
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• pp.181-181
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• 1999

Self-assembled monolayers(SAMs) of alkanethiol have been formed on the Cu(111) surfaces in vacuum. The thermal behavior of octanethiol-based SAMs on the Cu(111) surface have been examined in ultrahigh vacuum. Using X-ray photoelectron spectroscopy (XPS), it is found that the monolayers are stable up to about 500K in vacuum. Decomposition is signaled by a decrease in the intensity of C ls peak, accompanied by an increase of the intensity of the Cu 2p peak. However, the intensity of the S 2p peak doesn't change much as a function of annealing temperature. Thermal the decomposition mass spectra show that n-alkene is the predominant species desorbing from the surface in the 500-600K temperature range. The totality of these data leads to the conclusion that the monolayers decompose through the S-C bond cleavage by hydrogen elimination reaction, resulting in the desorption of hydrocarbon moiety as n-alkene. Following this initial decomposition step, Cu2S layers are observed on the surface. For comparison, attempts were also made to examine the thermal behavior of octanethiol-based SAMs on the Cu(111) surface in air. It has been shown that the SAMs on the Cu(111) surfaces begin to desorb with the oxidation of the thiolate to sulfonate at 400K. Upon annealing to 450K, the monolayer has almost completely desorbed as indicated by the virtual disappearance of the S 2p peak.

• 건축역사연구
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• 제25권1호
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• pp.47-57
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• 2016

The purpose of this paper is to review and analyse the influence of Hegel on architectural historiography. With the point of view that Hegel is the origin of architectural history, this study try to find out how Hegel's philosophy and aesthetics deeply influenced the principle and method of architectural historiography. As a kind of meta-history Hegel's idealism played a important role in the interpretation of architecture and its historiography. We can call it Hegelian legacy and it gave a determinant idea in the discours of architecture, especially Modernism. With a critical view point this study tries to reveal the mythical character of the premise and hypothesis of Hegel's historicism and also reviews its positive aspects in the history of writing architectural history. Today Hegelian thinking in architectural historiography is seriously criticized and considered as a old way of writing history. But this study tries to find a possibility to recognize the contemporary architectural situation with Hegel's concept of universal history. The return of Hegel necessarily does not mean the idea of totality and universality in practice as like in Modernism, but to widen the recognition in contemporary practice and historiography.

• 한국실내디자인학회논문집
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• 제17권5호
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• pp.3-11
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• 2008

'The eye' and 'the gaze' organize the visual system and distinguish the subject from the others. Recent philosophical thoughts have forcefully argued against the tradition characterized by the domination of the eye that assimilates the alterity of the others to one's own, cancels their alterity, and totalizes their differences within himself. In the speculative discourse modeled on the eye, the alienation of self in its other and the reflection of the object are linked together in such a way as to form a totality in which they are reflected into one's another, leaving absolutely no remainder outside. By contrast to this totalizing tendency of the eye, Sartre and Lacan propose the gaze that becomes constitutive of vision. The modern architecture reinforced subject's eye and clearly separated the others from subject Through Descartes's visual paradigm, space became homogeneous and nature was seized by architecture. However, recently the clear boundary between subject and object is disappearing. Lacan insisted that oneself's eye and the other's gaze are mixed up in human sight This means that the boundary between the subject and the other is indistinct and also the boundary between an object and landscape is meaningless in architecture. The overthrow of gaze in contemporary architecture appears in the form of trans-boundary, translucency and widen architectural notion and expression.

• Journal of Astronomy and Space Sciences
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• 제14권2호
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• pp.233-241
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• 1997

충북대학교 천문대에서 1991년 10월부터 1993년 3월까지 총 42일간 근접쌍성 RZ Cas의 광전 측광 관측을 수행하여 UBV 광도곡선을 완성하였다. 제 1식심 의 광도곡선으로부터 8개의 제 1식심 시각 및 새로운 광도요소를 결정하였다. 우리의 광도곡선에서 제 1식심이 개기 식임을 확인하였고, 개기 식 지속시간이 평균 18.1분으로서 이 값은 약 $0.^{p}01$에 해당하는 값임을 알았다. Wilson Devinney 분석법을 사용하여 우리의 광도곡선과 Duerbeck & Hanel(1979)의 시선속도 곡선을 동시에 만족하는 RZ Cas 의 측광 및 분광학적 해를 구하고 이 값으로부터 이 쌍성 계의 절대량을 산출하였다.

• 대한가정학회지
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• 제51권1호
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• pp.89-95
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• 2013

The purpose of this study is to identify a causal relationship among green consumer behavior, environmental knowledge and environmental attitudes of students at the university of education. A total of 366 copies of questionnaires were used for the data analysis; 31 copies were excluded due to lack of response to any given question. To ensure the reliability and validity of the questions, technical statistics were performed, such as frequency, ratio, average, standard deviation, skewness, and kurtosis via SPSS 15.0, item-total correlation and the totality, and reliability analysis. A structural analysis was undertaken via AMOS 7.0 in a bootstrapping method in order to perform a path analysis among variables as well as to assess the suitability of the model. The findings of the study were led to the following conclusions: First, the causal model among green consumer behavior, environmental knowledge and environmental attitudes of students at the university of education is suitable to the empirical analysis on research variables. Second, the environmental attitudes of students at the university of education has a direct, positive effect on green consumer behavior. Third, the environmental knowledge of students at the university of education has an indirect, positive effect on green consumer behavior.

• 대한치과보철학회지
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• 제34권4호
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• pp.675-686
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• 1996

Today, dental implants are an acceptable alternative, capable of providing bone-anchored fixed prostheses for improved quality of life and self esteem for many patients. Research advances in dental implantology have led to the development of several different types of materials, and it is anticipated that continued research will likewise lead to advanced dental implant materials. Currently used pure titanium has relatively low hardness and strength which possibly limits its ability to resist the functional loads as a dental implant. Ti-6Al-4V also has potential problems such as corrosion resistance, bone biocompatibility etc. The carefully selected Zr, Nb, Ta, Pd, In constituents could improve mechanical strength, corrosion resistance, and biocompatibility compared to that of currently used implant metals. On the basis of the totality of the data from our study, it can be concluded that new titanium alloys containing Zr, Nb, Ta, Pd, In are able to provide improved mechanical properties, corrosion resistance and biocompatibility to warrant further investigation of it's potential as new biomaterials for dental implants.

• The Journal of Korean Physical Therapy
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• 제8권1호
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• pp.109-119
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• 1996

Although the physical therapy of both East and West has been based on an identical philosophy, they have had their own therapy with difference in its form and pattern. In general, cupping is used to diagnose and treat viscera by means of acupuncture point, and myofascial release is also used for both diagnosis and orthopedic treatment on the basis of trigger point and myofascial however, when they have a lot of identical facts such as using both mental and physical aspects of human beings for treatment, keeping nervous action balanced, and recovering depressed nervous functions and relieving the pain. In addition. their identical fact includes that they tend to treat patients by using symptoms and reaction shown in their skin, and that both East and West try to consider myofascia as an integrated totality and as a unified body of organic functions with correlations. Among the principles of myofascial release, recently, it has been very identical that stimulus given to the skin results in synapse to sympathetic nerve through dosal horn cell has an effect on viscera, and that cupping is sued for diagnosis and treatment of viscera. It is required, therefore, to continue to carry out studying on this field.

• 한국실내디자인학회논문집
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• 제16권3호
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• pp.102-110
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• 2007

According to change a generation, in modern society the view which looks at the nature the people and the space is changing. As recognition which the environment is the most important factor in our society, there are researches that environment has to preserve and there are methods that the environment is related with the human, therefore, in the space ecology design views that similar to modern society are being shift. Museum of natural environment is public and popular space that it is designed and composed by a method of ecology space design. Hence, on this study, the museum of natural environment is defined public space by ways of characteristics of ecology design and a design characteristic which the museum of natural environment basically has to arrange are examined. Gallery of natural environment is most related with subsidiarity of mutuality, unity of the totality and stablity and will need other factors such as diversity & balance and suitability. Characteristic of museum of natural environment will be understood method for extension of a sustainable and mutual public space based on the this study, and it will become a process that we will have to advance for not only the present day but also the future.

• 건축역사연구
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• 제8권1호
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• pp.63-80
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• 1999

Poet, Yi-sang, born in 1910, originally studied architecture in Kyeong Sung High Technical School. He also experienced an architectural practice in Chosun Chongdokbu (the Government office of Japanese empire in Korea) during 4 years. After resigned the post of architectural engineer in 1933, he became a man of letters. Until his death in 1937, he published the writings hard to understand, which remind us of the works of western avant-garde. Because of the peculiarity and difficulty of his poem and novels, he becomes the object of studies by many critics and historians of literature. And he is estimated as the representative of Korean modernism. This study tries to related Yi-sang's early poems to architectural discourse for the search of 'modernity' of Korean modern architecture. His early poems, which is published in from 1931 to 1933, are worthy of notice because they contained a acute shock derived from radically changed spacial structure, the absolute emptiness of the individual happened in the 1930's Seoul. They also show a different attitude from the writings of Park Dongjin and Park Kilryong, the architects contemporary with Yi-Sang. Compared with their writings, Yi sang's early poems had an insight into the totality of modern culture like western avant-gardes. Therefore Yi-sang's early poems can give us a good base to understand the characteristics of 'modernity' of Korean architecture.