• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권10호
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• pp.2692-2707
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• 2012

A separable identity-based ring signature scheme has been constructed as a fundamental cryptographic primitive for protecting user privacy. Using the separability property, ring members can be selected from arbitrary domains, thereby, giving a signer a wide range of ways to control privacy. In this paper we propose a generic method to construct efficient identity-based ring signature schemes with various levels of separability. We first describe a method to efficiently construct an identity-based ring signature scheme for a single domain, in which a signer can select ring identities by choosing from identities defined only for the domain. Next, we present a generic method for linking ring signatures constructed for a single domain. Using this method, an identity-based ring signature scheme with a compact structure, supporting multiple arbitrary domains can be designed. We show that our method outperforms the best known schemes in terms of signature size and computational costs, and that the security model based on the separability of identity-based ring signatures, presented in this paper, is highly refined and effective by demonstrating the security of all of the proposed schemes, using a model with random oracles.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제29권3호
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• pp.207-230
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• 2022

In this article, we investigate several aspects of (R, S)-hyper bi-modules and describe some their properties. The concepts of fundamental relation, completes part and complete closure are studied regarding to (R, S)-hyper bi-modules. In particular, we show that any complete (R, S)-hyper bi-module has at least an identity and any element has an inverse. Finally, we obtain a few results related to the heart of (R, S)-hyper bi-modules.

• 한국조경학회지
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• 제26권3호
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• pp.52-65
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• 1998

It has been recognized that the cityscate identity is a very important factor in a modern city. It is necessary to have a variable view to urban comunities for understanding the cityscape identity. We have investigated the contents of archaic texts such as the geography for tracing a cityscape identity to its origin in a city. Because it has been written about politics, economics and culture of a specific area in the geography based on deep interest to the city, we can look into the early image of the cityscape closely after searching of archaic texts. It is also significant to stdy with archaic texts of geography since these studies have a correlatio to the understand of an area and the keeping of historical conscious which are fundamental of cityscape identity. We have studieds on the area of Cheongju from the middle of Chosun dynasty to the end of this kingdom, since that many geographies were described those days. It was selected "Go-Reo-Sa" and "Se-Jong-Sil-Lok" Geography, "Sin-Jeung-Dong-Guk-Y대-Ji-Seung-Lam" "Dae-Dong-Ji-Ji" "Dong-Guk- Yeo-Ji-Ji", "Jeug-Bo-Mun-Heon-Bi-Go Yeo-Ji-Go", and "Taek-Li-Ji", as archaic texts of geography because these texts described in detail about city and gave a clue to speculate an image of city. The major results are as follows; 1) It was described about the cityscape in those archaic texts are metaphysical image, existing and usable elements of cityscape, lost resources of cityscape. 2) The metaphysical images are neither objective nor consistent in the each archaic texts. But the metaphysical image of old city suggests good insight for the application to the modern city image. 3) It is necessary to the careful onsideration about the existing elements. 4) There are variable programs about the lost resources of the cityscape, in accordance with the possibility of the restoraton. 5) The physical and visible factors and non-physical and invisible factors are equally important elements of the cityscape identity. Our research suggests that it is necessary to understand in detail how those factors of cityscape identity have changed with the changes of the times, and how those factors affect the modern cityscape identity.

• Journal of applied mathematics & informatics
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• 제11권1_2호
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• pp.373-378
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• 2003

consider the problem of sequentially hypotheses about a parameter $\theta$ in the presence of the nuisance parameter $\rho$. and we investigate further to computing the error probabilities and expected sample sizes in the frequentist properties of the adaptive S.P.R.T. for $\theta$.

• 한국가정과교육학회지
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• 제11권1호
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• pp.1-11
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• 1999

The purpose of this study were to analyze high school girls’sex role identity and underwear purchasing behaviors, and to provide the educational guidelines for high school girls as a underwear comsumer and the fundamental data necessary for the products planning of underwear manufacturing companies. The questionnaire was composed of questions about the types of sex role identity, pursuit factors and purchasing behaviors of underwear. The respondents were girls from 6 high schools in cities in Chonbuk Province. The questionnaires were collected from April 6th to May 12th in 1998. 510 questionnaires were used for data analysis. Frequency, percent, average, standard deviation, F-test, $$\chi$^2$-test, and Duncan’s multiple range test were followed. The results of this study were as follows：1. Among the sex role identity groups, the androgynous group was the largest, and the masculine group was the smallest among high school girls. 2. High school girls sought after practicality most when purchasing underwears, but sought after the brand least. The androgynous group recognized practicality, aesthetics, and sexual attraction most, but the undifferentiated group recognized them least. 3. The high school girls bought underwears objectively when they were worn out, made use of TV, newspaper, and radio advertisements as the information sources, and considered the size, comfort, and style. They recognized the prices of underwears as moderate. They depended on their mother most when purchasing underwears and reflected their dependents opinion on selecting underwears partially. They purchased at the underwear specialty store.

• 한국생활과학회지
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• 제6권2호
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• pp.133-144
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• 1997

Clothing is considered as a means of self-projection in the childhood and children show clear preference on their own favorite clothing on which their latent identity is reflected. Changing sex-role identity, in particular, in the modern complex society specially affects the clothing behavior of children. The purpose of this study is to investigate the clothing behavior of children in conjunction with sen-role identity and home environment variables. This study will provide fundamental information on the clothing behavior in the childhood and be of help in selecting appropriate clothing in accordance with the variation of sex-role identity. Necessary information for this study was obtained through a questionaire. 'Bem sex-role identity inventory' was used to investigate the effect of sex-role identity and the clothing behavior was studied in conjunction with the factors of conformity, dependence, aesthetics and interest. The subjects of investigation are composed of three hundred male and female elementary school students in the 5th and 6th grades. For the statistical analysis of the collected data, percentage(%), mean value(M), standard deviation(SD) and Pearson's correlation coefficient were calculated and t-test, $x^2$-test, and Duncan's multiple range test were performed. The results form this study are as follows : 1. Sex-role identity shows a little difference according to gender, order of a birth and standard of living. This small difference is shown to be statistically insignificant. 2. In clothing behavior in connection with the sex-role identity, statistically significant trend was not found in typical sex-role identity group. However, clothing behavior in modernistic sex-role identity group exhibits statistically significant results in the factors of dependence, aesthetics and interest at the level of P<.001. 3. As concerns the clothing behavior in connection with gender, boy students show statistically more significant tendency in aesthetics and interest than girls do. However, boy students show statistically more significant tendency in aesthetics than girls do in connection with the standard of living. Although the clothing behavior associated with the level of parents education, mother's age and existence of mother's job shows a little difference in mean values, statistically significant trend was not detected. 4. Clothing behavior of the children shows a meaningful correlation between the factors. 5. Through 3-dimensional variables analysis, it is found that there is no mutual interaction between gender, sex-role identity and standard of living on the clothing behavior. The results from MCA supplementary analysis reveal that there is difference according to the gender, sex-role identity and standard of living.

• 한국콘텐츠학회논문지
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• 제8권12호
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• pp.131-140
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• 2008

<쉬리> 이후 주류 한국영화의 특징으로 나타나는 남성중심적 서사에 대한 비판은 영화비평의 한 의제를 구성해왔다. 이러한 서사는 사회적 모순에 대한 상상적 해결책으로 시대적 변화에 대한 반응이다. 본고는 남성중심적 서사의 핵심인 남성정체성 구성을 조건 짓는 토대로서 르페브르의 개념인 '일상'을 제시하고, 일상의 재발견을 통해 정체성 재구성을 모색하고 있는 이준익의 <라디오 스타>와 <즐거운 인생>을 분석한다. 분석의 결과는 양가적이다. 미시사적 개념인 ‘이름없는 사람’, 80년대에 대한 개인적 기억, 일상의 재발견이 정체성 재구성의 가능성을 보여주는 반면 여성의 일상은 서사의 주변부로 밀려나 성별관계를 고착시키기 때문이다. 그러나 기존의 남성중심적 서사와 차별되는 새로운 남성의 서사를 구축하려는 시도의 의미는 시대적 연관성 속에서의 지속적인 탐구를 요구한다.

• 한국학교보건학회지
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• 제9권2호
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• pp.223-237
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• 1996

This study was conducted in order to contribute to female student health by providing fundamental data for health instruction and health counsel. The purpose of this study is to determine the frequency of PMS by a menstrual distress questionnaire, and determine sex-identity factors related to PMS. The data were collected by a questionaire conducted from December 1,1995 to December 20, 1995. The subjects of research were 1,102 high school students in Seoul. The data analyzed was done using the SPSS PC+, and the results were as follows; 1. The perceived subjective symptoms were clusted behavioral change, negative affects, pain, impaired concentration, water retention and autonomic reactions. The most common symtoms during the period of 2 to 10 days before menses were vaginal discharge(79%), back pain(70.4%), nervous tension(60.8%), fatigue(56.2%), abdominal bloating(54.5%), mood change(52.8), pelvic pain(46.8%), resistance to study(45.9) and talking(43.3). 2. There was a significant correlation between the clusters symptoms; negative affects and behavioral changes(r=.9326, p=.000), behavioral changes and impaired concentration (r=.8572, p=.000), negative affects and impaired concentration(r=.8411, p=.000) and autonomic reaction and pain(r=.7267, p=.000). 3. Sex-identity factors were related to PMS ; perception of the female(F=5.1811, p=.006) and pregnancy concerns (T=3.54, p=.000).

• 한국식생활문화학회지
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• 제36권3호
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• pp.274-283
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• 2021

What is the origin of kimchi and what changes did it go through to become the kimchi of today? Also, what makes kimchi different from other pickled vegetables such as Chinese paochai, Japanese tsukemono, and Western pickles, and sauerkraut, and what is the identity of kimchi? This study is the result of thought on these fundamental questions about kimchi which is the only pickled vegetable distributed around the world that uses a fermented and ripened animal seasoning called jeotgal (salted marine life) to dramatically improve its umami taste and nutritional value, thereby securing its uniqueness. Kimchi has further evolved into a unique and high-quality pickled vegetable through the use of its specialized seasoning, adopting a composite fermentation mechanism and absorbing new ingredients such as red pepper. It is expected that this paper will invigorate the discussion on the firm establishment of the identity of kimchi and the future direction that it may take.

• International Journal of Advanced Culture Technology
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• 제11권1호
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• pp.263-269
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• 2023

Zhang Yu was a famous Taoist priest and poet in Yuan Dynasty, compared with the identity of Taoist and poet, his handwriting had greater influence in history. According to the relevant historical data, people at that time were mainly attracted by his Taoist identity and poetic talent. However, if we considered him as a poet,or a calligrapher to inspect,it would be often easier than facing a Taoist priest. Zhang Yu's poems and relationships can be used as some clues for our investigation of his calligraphy activities,not only would it not affect us to judge the value of his calligraphy, but also we will comprehensively and objectively analyze his calligraphy works. His early calligraphy closely followed Zhao Mengfu, in his later years, when he met Yang Weizhen, the style of writing changed greatly.During this period, what kind of changes and fundamental influence had on Zhang Yu's life and book learning thoughts experienced. Our contributions to this paper are as follows.To solve this issue,this passage will try to find clues from several representative figures and representative calligraphy works of Zhang Yu, and draw on the research results of relevant scholars to discuss the identity of Zhang Yu as a Taoist priest and the origin and style characteristics of his handwriting and probed into the status and influence of his calligraphy in history.