위치 기반 서비스에서 K-anonymity를 보장하는 가중치 근접성 그래프 기반 최근접 질의처리 알고리즘

장미영,장재우,Jang, Mi-Young,Chang, Jae-Woo 한국공간정보학회 2012 한국공간정보학회지 Vol.20 No.4

무선 통신 기술 및 GPS(Global Positioning System)등의 발달로 인하여 위치 기반 서비스 (Location-Based Services: LBS)가 크게 발전하는 추세이다. 그러나 위치 기반 서비스를 이용하기 위해 질의 요청자는 자신의 정확한 위치 정보를 위치 기반 서비스 제공자에게 전송해야 한다. 따라서 위치 기반 서비스를 제공하면서 질의 요청자의 위치 정보를 보호하는 것이 중요한 과제이다. 이 문제를 해결하기 위해, 기존 기법은 실제 사용자의 위치를 숨기며 네트워크 사용을 줄일 수 있는 2PASS 기법을 사용하였다. 그러나 이 기법은 실제 사용자 분포를 고려하지 않기 때문에 실제 사용자 위치 보호를 완전히 보장하지 않는다. 따라서 본 논문에서는 K-anonymity를 보장하는 가중치 근접성 그래프 기반 최근접 질의처리 알고리즘을 제안한다. 제안하는 알고리즘은 질의 영역 내 K-anonymity를 보장함으로써 사용자의 위치 정보를 보호할 뿐만 아니라 불필요한 질의 결과 탐색을 줄여 네트워크 효율을 증가시킨다. 마지막으로, 성능평가를 통해 제안하는 기법이 기존 연구에 비해 질의 처리 시간 및 네트워크 효율 측면에서 우수함을 보인다. Location-based services (LBS) are increasingly popular due to the improvement of geo-positioning capabilities and wireless communication technology. However, in order to enjoy LBS services, a user requesting a query must send his/her exact location to the LBS provider. Therefore, it is a key challenge to preserve user's privacy while providing LBS. To solve this problem, the existing method employs a 2PASS cloaking framework that not only hides the actual user location but also reduces bandwidth consumption. However, 2PASS does not fully guarantee the actual user privacy because it does not take the real user distribution into account. Hence, in this paper, we propose a nearest neighbor query processing algorithm that supports K-anonymity property based on the weighted adjacency graph(WAG). Our algorithm not only preserves the location of a user by guaranteeing k-anonymity in a query region, but also improves a bandwidth usage by reducing unnecessary search for a query result. We demonstrate from experimental results that our algorithm outperforms the existing one in terms of query processing time and bandwidth usage.

스텁을 갖는 PBG 셀로 구현한 마이크로스트립 PBG 구조 및 듀플렉서

장미영,기철식,박익모,임한조,김태일,이정일,Jang, Mi-Young,Kee, Chul-Sik,Park, Ik-Mo,Lim, Han-Jo,Kim, Tae-Il,Lee, Jung-Il 대한전자공학회 2001 電子工學會論文誌-TC (Telecommunications) Vol.38 No.12

본 논문에서는 마이크로스트립 라인에 포토닉 밴드갭(photonic bandgap: PBG) 구조를 구현할 경우 저지대역 내에 형성되는 통과대역의 부분대역폭(fractional bandwidth)을 효과적으로 조절할 수 있는 PBG 구조의 설계에 관하여 연구하였다. 이 구조는 결함을 갖는 통상적 PSG 구조의 기본 PSG 셀(cell)에 스텁(stub)을 더하여 구현한 것으로 PBG 셀에 첨가된 스텁 길이가 증가함에 따라 스컷(skirt) 특성이 현저하게 개선됨을 볼 수 있었다. 이때 차단주파수(cutoff- frequency), 저지대역 및 통과대역의 중심주피수는 저주파 쪽으로 이동하였고 통과대역폭은 감소하였다. 이러한 결과는 PBG 셀에 스텁을 활용함으로써 저지대역 내에 형성되는 통과대역의 부분대역폭을 효과적으로 조절할 수 있음을 보여준다. 또한 스텁을 갖는 PBG 구조를 응용하여 우수한 스컷 특성을 갖는 듀플렉서를 설계할 수 있음도 보였다. We have studied the design of the photonic bandgap (PBG) structure on the microstrip line that can effectively control the fractional bandwidth of the passband formed in the stopband by adding the stub in the cell of the microstrip PBG structure. As the length of the stub increases, the cutoff frequency and the center frequency of the stopband are decreased, while the bandwidth of the stopband is increased. We have also found that the fractional bandwidth of the passband formed in stopband by the introduction of defect decreases as the stub length is increased. These results mean that adding the stub in the normal PBG structure is an effective way to control the fractional bandwidth. As an application example, we have implemented a microwave duplexer using the proposed structure.

도로 네트워크 환경에서 암호화된 공간데이터를 위한 K-최근접점 질의 처리 알고리즘

장미영,장재우,Jang, Mi-Young,Chang, Jae-Woo 한국공간정보학회 2012 한국공간정보학회지 Vol.20 No.3

최근 클라우드 컴퓨팅의 발전에 따라, 데이터베이스 아웃소싱(Outsourcing)에 대한 연구가 활발히 진행되고 있다. 또한 무선 통신 기술 및 모바일 기기의 발전으로 인해 위치 기반 서비스를 이용하는 사용자의 수가 증가하였다. 따라서 개인 또는 소규모의 사업자는 데이터 저장 및 관리 비용을 줄이기 위해 그들의 공간 데이터를 위치 기반 서비스 제공자에게 아웃소싱 한다. 그러나 사용자의 위치 정보는 시간대별 방문 장소 및 개인 정보를 지니고 있기 때문에, 이에 대한 허용되지 않은 접근 시 개인 정보 유출 문제가 발생한다. 따라서 위치 정보 아웃소싱을 위한 개인 정보 보호 연구가 필요하다. 이러한 문제를 해결하기 위해, 본 논문에서는 아웃소싱 환경에서 도로네트워크를 고려한 암호화된 공간 데이터베이스 기반 k-최근접점 질의 처리 알고리즘을 제안하였다. 제안하는 기법은 데이터베이스 아웃소싱을 위해 위치 데이터를 네트워크 거리 정보로 변환 및 암호화한 가공데이터를 생성하여 이를 서비스 제공자에게 전송한다. 또한, 전처리 과정을 통해 네트워크 노드와 POI 거리를 미리 저장하여 네트워크 탐색을 빠르게 수행하며, 질의 수행 시 최근접 대표 POI 및 암호화된 거리 정보를 이용하여 질의 결과 후보 집합을 탐색한다. 마지막으로, 질의 영역 재설정 과정을 통해 불필요한 후보 탐색을 줄임으로써 효율적으로 POI를 탐색한다. 마지막으로, 성능평가를 통해 제안하는 기법이 기존 방법에 비해 우수함을 보인다. Due to the recent advancement of cloud computing, the research on database outsourcing has been actively done. Moreover, the number of users who utilize Location-based Services(LBS) has been increasing with the development in w ireless communication technology and mobile devices. Therefore, LBS providers attempt to outsource their spatial database to service provider, in order to reduce costs for data storage and management. However, because unauthorized access to sensitive data is possible in spatial database outsourcing, it is necessary to study on the preservation of a user's privacy. Thus, we, in this paper, propose a spatial data encryption scheme to produce outsourced database from an original database. We also propose a k-Nearest Neighbor(k-NN) query processing algorithm that efficiently performs k-NN by using the outsourced database. Finally, we show from performance analysis that our algorithm outperforms the existing one.

노년의 자기효능감 증진을 위한 소설 독서요법

장미영 ( Jang Mi-young ) 한국문학치료학회 2006 문학치료연구 Vol.4 No.-

Studies on novels have focused on artistic side so far. Now it is necessary for novel critics to have more concern for `readers` and it seems the time to recognize. practical value of novels as a part of novel critics. Such a try will also be an effort to expand the horizon of the synchronic expectation apart from the main stream which views the historic meaning of novels in a diachronic way. Todays, Korean society is getting in trouble with the explosive increase of old age population. For a desirable old age life in the future, it has to be done first to find out the meaning of old age`s life and to build social condition needed to realize the meaning in the area of humanities. Reading a novel in old age will be the best way our society should take. But, in order to make reading a novel an old age culture, the elimination of obstacles of the old to read or the development of indirect way of reading should be studied. Furthermore, some methodology such as the method leading to mutual text understanding of novels, the method of reading for cultural communication between generations is needed. It is the way to keep human self-esteem in old age and not to lose self-effectiveness. Considering the practical novel reading methods has the meaning to expand the utility of novels and to restructure and vary the ways of novel studies.

영상시대를 위한 비주얼 독서 교육 방안

장미영 ( Mi Young Jang ) 전주대학교 인문과학종합연구소 2007 인문과학연구 Vol.- No.12

디아스포라문학과 트랜스내셔널리즘(1) : 천운영 장편소설 『잘 가라, 서커스』를 중심으로

장미영(Jang Mi-young) 한국비평문학회 2010 批評文學 Vol.- No.38

This paper aims to look into what is the diaspora cultural phenomenon and what is the potential of the transnationalism. The purpose of this paper is to stop the existing diaspora directing to social worries and to search the possible way to make it into the positive assets leading to the Korea future global network era. The word of 'diaspora' originates from the Greek language 'diasporein' containing 'dia' and 'speirein' which mean scatter, spread and disperse. Nowadays, the word diaspora has been widely expressed by the people from immigrants, refugees, asylum to abroad immigrant, ethnic community, that is, ethnically, culturally, religiously mixed community and now further represents the hybrid, heterogeneity, double consciousness and identity formation. The diaspora literature so far has expressed Korean people's emmigration as a negative issue such as dispersion, dismantle, expulsion, asylum etc. But the recent reverse-diaspora literature expresses foreigner's immigration and Korean society's tolerance and it's interactive influence and inter-appropriation as a result. So Korean diaspora literature is now shows the action-reaction that Koreans and foreigners in Korea lose their original identity and mix each other. Such a cross-border phenomenon is shown in the space of diaspora where the immigrants live. It is a creative action of innovating the current situation and searching for the communication for Korean authors to take the diaspora lives as an object of the novel. It is because the diaspora literature implies the concept of capsizal which makes the novel itself the fiercely resisting thing against the irrational world.

『여원』 소재 서사만화 연구

장미영(Jang Mi-young) 국어문학회 2008 국어문학 Vol.44 No.-

The aim of this study is to review narrative comics in the female magazine,"YoeWon"in the gender's point of view and to investigate how the characteristics of post-war female culture is related with the Korean modem style. Cartoon and literature have in common in a way that they are both recognized as creative arts through language and story. But there is a difference between literature which writes a story by words and cartoon which picturizes the story thereby keeps the imagination unharmed. If we have more flexible and more extended point of view on the literature, cartoons can be recognized as one of various forms of narratives. Considering today's situation that the division of classical genre and the border of genre is demolished, it is necessary to escape from language-oriented bias existing in the literature researchers. This study is to ascertain the possiblity of the said actions by performing the desire of expanding the territory of the object of the literature study. The object of this study,"YeoWon"is a female magazine with the motto of"advancement of the cultural thought of women"which started to include various cartoons from Oct. 1955, the very beginning of the magazine. Most main characters are women such as a housewife, single female, high school girls, university students, working woman, married couple and maidservants. Narrative comics have the same character in every series even though the story goes differently all the time. Every scenes reflect the current life and approach the criticizm of realization by using the narrative method of exposing the character's personality and also of making a caricature. The roles and activities of female main characters in the narrative comics are divided into emotional work and physical work by their clothes and hair styles. A woman who is working physically at home wears white traditional jacket and black skirt with hair in a chignon or with an apron, on the other hand, a woman who is working emotionally wears a western style one-piece dress or two-piece dress with western style hair. Women's physical works in the cartoons are limited to home work with little compensation and treated as worthless. In particular, like a housemaid cartoon 'Aunt Walsun', the house work strongly related to physical labor is regarded as women's work only and this idea results in the distinction of sex in the labor. House work is always given to women only in comparison with outside work which is treated as men's work. Cartoons show that to do the house work properly is too heavy to keep women's health. The cartoons ascertain the house work to be a very heavy physical work as we see in the 'Aunt Walsun' and make the female character a tough woman. On the contrary, a rich housewife or a single woman is described as a person who has to do the emotional work even though she is free from house work. Emotion can be regarded as personal, natural and voluntary rather than compulsory, but the cartoons express emotion as a kind of socially forced work. House wife's emotional labor is differentiated from man's mental work. The latter is recognized as the expression of individual ability in order to achieve the social work. However, the former is regarded as non-labor just focusing on consideration and care for the family members' rest which is also derived from collective ideology. That is, house wife's emotional labor has to be done from a mere sense of duty under the social structural force not by the voluntary or creative choice. Emotional labor at a workplace is done in the form of office cleaning, coffee serving, an erand etc. This emotional labor is regarded as women's own nature and even promoted as an etiquette of female officer. The meaning of emotional labor becomes equivalent to the meaning of care, consideration, obedience, kindness, winsomeness, softness etc and makes the expressions such as 'a woman should be winsome' or 'female officer has to be a flower i

공간 데이터베이스 아웃소싱을 위한 비트맵 암호화 기반 질의 결과 무결성 검증기법

장미영(Mi Young Jang),윤들녁(Deulnyeok Youn),장재우(Jae Woo Chang) 한국정보과학회 2014 정보과학회논문지 : 데이타베이스 Vol.41 No.1

최근 클라우드 컴퓨팅이 발전함에 따라, 이를 활용한 데이터베이스 아웃소싱(Outsourcing)에 대한 연구가 활발히 진행되고 있다. 그러나 기존 데이터 암호화 기법은 데이터 분포를 고려하지 못해 원본 데이터가 유추 가능한 문제점을 지니며, 질의 결과 무결성 검증 기법은 질의 결과에 포함되는 검증 데이터의 크기가 증가하는 오버헤드를 지닌다. 따라서 본 논문에서는 아웃소싱 된 데이터 보호를 위한 비트맵 암호화 인덱스 기반 질의 결과 무결성 검증 기법을 제안한다. 제안하는 기법은 공격자의 원본 데이터 유추 방지를 위해 데이터 분포를 기반으로 앵커 영역을 선정한다. 아울러, 앵커 영역 별 시그니처 인덱스를 생성하고, 질의 결과 시그니처와 비교함으로써 질의 결과 무결성을 제공한다. 성능 평가를 통해, 제안하는 기법이 기존 기법에 비해 공격자로의 원본 데이터베이스 노출 확률을 감소시키면서, 빠른 질의 처리를 수행함과 동시에 무결성 검증을 위한 검증 오버헤드를 감소시키는 것을 검증한다. Due to the advancement in cloud computing technology, research on the outsourced databases has been spotlighted. Consequently, it is becoming more important to guarantee the correctness and completeness for query results. Existing query processing schemes for outsourced databases suffer from an original data leakage problem because they do not consider data distribution when encrypting original data. On the other hand, previous researches on query result integrity suffer from the overhead of verification object transmission. To resolve these problems, we propose a bitmap based data encryption index and a query result integrity auditing method. We propose an anchor selection algorithm using split and merge policies based on data distribution to preserve the privacy of users. Our query result integrity auditing method generates a signature index for each anchor and performs integrity checks by comparing the signature with query results. Through performance evaluation, we show that our method outperforms the existing method in terms of query processing time and verification overhead.

여성결혼이민자의 자기정체성 형성을 위한 한국문화교육 방안

장미영(Jang, Mi-young) 한국언어문학회 2008 한국언어문학 Vol.64 No.-

This study is to point out Korean society’s situation discriminating between female spouses from underdeveloped countries and those from developed countries and to find a solution to it. To solve the problem, this study focuses on the education establishing self-identity. By 2007, foreign spouses who have been married to Korean citizens amount to 106,437. Among them, 93,902 people, 88.2% are female. The word of “female marriage immigrants” means different from international marriage for love. the people called “female marriage immigrants” are those who married Korean males through marriage agencies or certain religious bodies. In this case, most Korean male spouses are singles who are not chosen by Korean females. The word “female marriage immigrants” also has a meaning of female marriage immigrants from underdeveloped countries such as China, Viet Nam, Philippines, Mongolia and Thailand etc. Recently, Korean society is developing programs based on “the ethics of differences” which excludes violent Korean culture education demanding uniformity. The Korean culture education based on multicultural philosophy can be recognized as an advanced culture education which admits the differences of each culture. It can also be regarded as an improved culture education in a way of “the ethics of differences” byteaching the excellency of the culture of mother’s country. But “the ethics of differences” can not be an active concept creating new values. Korean society has to find a new ethics in order to adopt various cultures as well as to develop the ability of female marriage immigrants. The final goal is not to only recognize the differences but to obtain equality. The linguists, Acton and Felix categorized the cultural change of foreign language learners into 4, ie. Tourist stage, Survivor stage, Immigrant stage and Citizen stage and discovered the acculturation threshold between survivor stage and immigrant stage. Korean culture eduction should be done taking the stages of the learner’s cultural change into account. Stage 1, the tourist stage has to focus on the position of mere observer who just compare Korean culture with his/her own country’s culture. Stage 2, the survivor stage is to teach the basic cultural knowledge which is necessary for living. Stage 3, the immigrant stage needs to obtain the knowledge of cultural products, tangible or intangible, and to take detailed actions under Korean culture and further understand it. Stage 4, the citizen stage requires the education for the learner’s practice in his/her own way, that is to say, to make the learner to solve the problem on her own using materials around him/her. In conclusion, Korean culture education for female marriage immigrants should become more meaningful by considering their better lives and new happiness. It means that the education should create productive energy individually and socially. Our society has to go over the mere concept of recognizing foreign culture. We have to go further by making each female marriage immigrant to develop ‘the nomad thought’ and reborn as a “nomadic subject” in order to make self-achievement on her own.

다문화가정아동을 위한 언어치료 학습교재 개발 방안

장미영(Jang Mi Young) 국어문학회 2009 국어문학 Vol.46 No.-

The aim of this study is to grope for the direction of the content and structure of the learning material for 'language treatment' which will be used as an 'education' and 'treatment' for the children of multi-cultural families with language disorder. Language treatment for children of multi-cultural families will be a part of more systematic and effective Korean language education considering correction of language disorder as well as language development which is different from language treatment for normal children. The result will be fluent Korean language and improvement of learning ability. Language disorder of the children of multi-cultural families comes from a defect in the course of a linguistic development. The language environment in the childhood which causes lack of spoken language contact due to the mothers without fluent Korean leads to the basic problem with pronunciation, accent and vocabularies of Korean language. The learning material for language treatment has to consider and recover the lack of experience of spoken language. Spoken language needs the training of pronunciation and accent as well as suprasegmental features such as strength, tone quality, rhythm, length. It is important to find the point place of articulation in the pronunciation training. Besides, it would not be possible for children to express their feelings until they recognize the strength adjustment from whispers to shout, the change the tone quality from husky, rough to a nasal, the length control of vowels and accent such as high or low tone. It aims at fluency in Korean language to learn the strength of words and paragraphs or to learn various patterns of rhythm in the sentences. The process of language treatment of phonology above mentioned is followed by that of lexicology which focuses on understanding the relationship between words and sounds and learning the meaning. This needs a balanced approach connecting repeated sentences with expected pictures. It is important for the balanced approach to make learning materials to connect the sense of sight with that of hearing such as looking for the same sound of one's first name by watching a picture, words having the same sound at the end or words sounding funny and looking unusual etc. The next step is the language treatment of semantics associated with elementary level of Korean language reading. It is to learn categorized vocabularies and related words based on the similarity or common function of things, for example, pencil and paper, toothpaste and toothbrush, spoon and chopsticks, book and note, go and come, here and there, inside and outside, up and down. The language treatment of pragmatics is the next. Pragmatics is the functional side of language understanding or expressing the language according to the context. It is categorized as a high level of language treatment by teaching children how to use words properly considering the purpose and context and how to understand other people's intention. As I mentioned above, the language treatments based on phonology, lexicology, semantics and pragmatics lead to the study of speaking and hearing in the elementary Korean language. Therefore it will be desirable to make a material for the language treatment containing contexts which are connected to a fairy tale, a traditional tale or a folk tale and further to the expressions used in the elementary school classroom. The contents of the material for language treatment should be decided on the initiative of children. It doesn't mean that the speech therapist has to play a passive role. We are just cautious of the situation putting the relationship between the speech therapist and children to that of question-answer or order-obey. If children play an active role, most of them easily achieve sensitivity to various feelings and ability to express it. It makes generalization more easily and facilitates their role as communicators. Looking at a child's initial langua