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.

인터넷소설과 웃음

장미영(Jang Mi-young) 국어문학회 2005 국어문학 Vol.40 No.-

An internet novel is one that is come out on the internet and becomes popular among readers. The criteria of success is how many people get on the internet to read it and by its very nature lies in the hands of young people, the main internet users, from the age of mid-teens to mid-twenties. The purpose of this article is to review the internet novel's positive influence on the society by scrutinizing the way teenagers produce and spend enjoyment through an internet novel. Internet culture mainly consists of teenagers ad lib sensibility which can be seen in young people's language. Their mode of expression is not 'a written language' but 'spoken language of chatting' or 'a compound word' with an emoticon which has been developed in order to know at once someone's intimate feelings. The characteristics of the internet novel are improvisation, frivolity, disorder, unrest, uproar and so on which are also characteristics of the pastime culture. In sum, an internet novel is an icon of young people's pastime culture. In internet novels, teenagers' challenges to socialvalue using various ways of talking lead a laugh by eliciting unexpected event. Their ways of talking are characterized by unthoughtfulness, haughtiness, frivolity, a robust sense, an ill-cultivated act, intemperance, inconsideration, lack of emotion, gracelessness. The exposure of primitiveness and vulgarity causes a laugh at once. A laugh in an internet novel works as the code of young people's deviation and resistance against the order of the older generation and as the code of a search for young people themselves. This means that, for juveniles, an internet novel functions as a solution to their complaints and frustration. An internet novel becomes closed in character by inventing external language only used by young people. External language is a made-up language in an abbreviated form for a faster internet chatting. Young people have fun with it even though it is impossible for older generation to understand it. Specially, newly made external language is ranked as a great wit. A laugh through the external language is regarded as a selfish satisfaction with the contempt for other people. A description of a scene at the internet novel is chatting-oriented and an emoticon is adopted as a description of expression. By doing so, a chatting style and an emoticon become symbols of actualfeeling expression causing spread of a laugh. Particularly a laugh from the emoticon, showing true feelings, becomes an important culture code. Among other genre, an internet novel is a better tool of expressing human sensibilities and searching for a laugh. A laugh functions as an outlet for the stresses and strains of our daily lives. A laugh from the internet novel works as an element for pure communication about humans by exercising their imagination.

『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

판소리의 현대화를 위한 번역 현황과 방향

장미영(Jang Mi-young) 韓國批評文學會 2010 批評文學 Vol.- No.36

Pansori has been translated into the modern Korean language through 3 stages. The first stage was to collect and file-up the Pansori passed on by oral tradition. The epic chants before then had not been worthy of historical materials as it had been arranged just individually and sporadically. In addition, some of the epic chant were out of date which needed to be re-arranged and others no more existed and others were newly formed. So it was essential to compile the epic chants mainly well transmitted. The epic chant collecting work was focused on a popularity basis and classified by school, 바디(body) and singer. As the Pansori reflects a traditional life and language, there are many parts which are difficult for modern people to understand. The reason for that is because not only there are some misinformation but also language used for the Pansori is old version spoken more than 200 years ago resulting. Annotations were made in the report as the aim for the study was to make ordinary people fully understand the Pansori. Modernization of Pansori needs outstanding knowledge of Korean classical literature, ancient language and chinese characters. Considering the fact, The study has relied on the advice of scholars majored in Chinese characters, Korean classical literature and ancient language research in order to get accuracy. The results of the 2nd stage work were used for translating Pansori into modern Korean language. The process of translation into modern language is divided into the first work concentrating on a meaning transmission and the second work putting the former to directly apply to Pansori. All two works can be used for a caption which helps audience’s understanding of the Pansori on the stage. For translation of Pansori into modern language, first, it is necessary to change the old sayings, a name of place in China, proper nouns, a proverb into the modern expressions and, secondly, considering the fact that Pansori is spoken in Cholla dialect, it is necessary to change it to the standard language. Third, the sequence of tenses is needed because Pansori as a performance language normally ignores tenses. As Pansori is used not only as a reading book but also as a sing or performance, there should be good translation expressing the wonderful rhythm, rhyme and colloquiality of the Pansori. There also should be a standardization of Pansori epics which have varied from singers to singers. The translation of Pansori epic chants will be the major national achievement of Korean culture in the future.

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

긍정탐색을 활용한 학습동아리 이중고리학습 사례

장미영(Jang, Mi-Young),김인숙(Kim, In-Sook) 한국교육컨설팅코칭학회 2017 교육컨설팅코칭연구 Vol.1 No.1

이중고리학습은 조직이 성장하는데 중요한 조직학습방법으로 알려져 있다. 본 연구는 학습동아리의 이중고리학습을 위한 긍정탐색 모델의 적용 가능성을 탐색하고자 하였다. 이를 위하여 학습동아리 컨설팅에 참여한 동아리 구성원을 대상으로 긍 정탐색 워크숍을 실시하고 워크숍 과정 중의 동아리 구성원들의 상호작용 자료와 워크숍을 통해 도출해낸 결과물을 수집하여 분석하였다. 연구결과, 사례연구 대상 학습동아리는 긍정탐색을 통하여 직면한 문제만 바라보는 시각에서 벗어나 동아리의 기본 가치, 나아가야 할 방향을 탐색하고 공감대를 형성하였으며, 구체적인 실천 계획까지 수립하는 것을 확인할 수 있었다. 이러한 결과는 긍정탐색 모델이 담론을 중심으로 한다는 점에서 학습동아리의 이중고리학습에 효과적이고, 절차가 명확하다는 점에서 표준화된 학습동아리 컨설팅 방법으로서 가능성을 시사한다. 향후 학습동아리에 최적화된 긍정탐색 모델을 활용한 컨설팅 모형이 개발된다면 학습동아리 활동에서 이중고리학습이 활성화될 수 있을 것으로 기대한다. Double-loop learning is known to be an important organizational learning method for organizations to grow. In this study, we investigated the possibility of applying the affirmative search model for the learning of the double rings in the learning circle. We sought to explore the possibility of applying the appreciative inquiry model for the double-loop learning in the learning circle. For this we conducted an appreciative inquiry workshop for learning community participating in this learning community consultation and analyzed the workshop results and the interaction between the community members. As a result, our study subject, the learning community was able to free themselves from the mere problems before them and explored the basic value of the club, its new directions and form certain consensus. This result suggests that the appreciative inquiry is effective for double-loop learning in the learning community in respect that it is centered on discourse, and it is possible to use it as a standardized learning community consulting method because of its clear procedure. We expect activation of the double–loop learning for development of the learning community by developing optimized appreciative inquiry consulting model.

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.