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.

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.

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.

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

서비스직 종사자의 진성리더십, 직무열의, 직무소진, 이직의도의 구조적 관계: 감정노동 강도에 따른 다집단 분석

장미영(Mi Young Jang),리상섭(Sang Seub Lee) 한국직업교육학회 2020 職業 敎育 硏究 Vol.39 No.6

이 연구는 진성리더십, 직무열의, 직무소진, 이직의도간의 구조적 관계를 살펴보고 감정노동 강도에 따른 변인간의 관계를 확인하고자 하였다. 국내 서비스직 종사자를 대상으로 설문조사를 실시하였으며 수집된 자료는 IBM SPSS 22.0 및 AMOS 22.0을 활용하여 구조방정식 모형 분석(Structural Equation Model)과 다집단 분석(Multi-group analysis)을 실시하였다. 연구결과, 진성리더십은 직무열의, 직무소진에 유의한 영향을 미치며, 이직의도에는 유의한 영향을 미치지 않는 것으로 나타났다. 또한 직무열의는 직무소진에 유의한 영향을 미치며, 이직의도에는 영향을 미치지 않았고, 직무소진은 이직의도에 유의한 영향을 미치는 것으로 나타났다. 감정노동 강도에 따라서는 고강도 및 저강도 집단 모두 진성리더십이 직무열의에 유의한 영향을 미쳤으나 직무소진과 이직의도에는 영향을 미치지 않았다. 또한 감정노동 고강도 및 저강도 집단 모두에서 직무열의가 직무소진에 영향을 미치고, 직무소진이 이직의도에 영향을 미치는 것으로 나타났다. 반면 직무열의가 이직의도에 미치는 영향은 감정노동 저강도 집단에서만 나타났다. 이 연구를 통해 서비스직 리더의 진성리더십이 직무열의를 통하여 구성원의 직무소진, 이직의도를 완화할 수 있으며 이들 변인간의 관계가 감정노동 강도에 따라 달라질 수 있음을 입증하였다. 후속 연구에서는 감정노동 강도에 따른 다양한 변인 간 영향관계를 비교 검토해야할 것이다. This paper aims to study the structural relationship between authentic leadership, job engagement, job burnout, and turnover intention, and then identify the relationship between the variables on the intensity of emotional labor. To this end, this paper carried out a survey on domestic service workers. then, conducted both the structural equation model and the multi-group analysis by using IBM SPSS 22.0, AMOS 22.0. The results of the study shows that authentic leadership had a significant effect on job engagement and job burnout, but not on turnover intention. Also, job engagement had a significant effect on job burnout and not turnover intention, and job burnout had a significant effect on turnover intention Regarding the intensity of emotional labor, authentic leadership had a significant effect on job engagement, but not on job burnout or turnover intention in both the high and low labor intensity group. In addition, job engagement affected job burnout and job burnout affected turnover intention in both the high and low labor intensity group among the emotional labor field. On the other hand, job engagement affected turnover intention only in the low labor intensity group.

영화 <친절한 금자씨> 의 복식과 상징성에 관한 연구 -주인공 복식을 중심으로-

장미영 ( Mi Young Jang ),조규화 ( Kyu Hwa Cho ) 한국패션비즈니스학회 2008 패션 비즈니스 Vol.12 No.1

The purpose of this essay is to know the expressed form and color and also to examine the inner symbolic meaning of the movie Sympathy for Lady Vengeanceby producer Chan-Wook Park. In the movie, the main character Geumja has double personality, having both images of a wicked woman and a woman saint, and she showed the clothing of both good and evil. For example, while she was in prison, her prisoner uniform while she was taking care of her inmates, her pajama which is the symbol of innocence when she was atoning and praying, Geumja`s appearance wasn`t fabulous when she was wearing baker`s cloth that symbolize pure inside. But in contrast, Geumja who was released from prison planned and execute vengeance, dress colorful dress and primary color make-ups. Blue color coat with gloomy mood, black leather coat with the image of female warrior, and the slip with intensive image and etc express Geumja`s will of revenge. Like this, depend on the psychology of main character Geumja, it`s easy to recognize the change of clothing and color, and it`s possible to understand the symbolic meaning in it.

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.

산업체 근로자의 진성리더십이 직무자율성, 무형식학습, 직무재창조를 매개로 주관적 경력성공에 미치는 영향

장미영(Mi Young Jang),리상섭(Sang Sueb Lee) 한국기업교육학회 2021 기업교육과인재연구 Vol.23 No.4

본 연구는 국내 산업체 근로자를 대상으로 진성리더십, 직무자율성, 무형식학습, 직무재창조, 주관적 경력성공 간의 구조적 관계를 파악하는데 목적을 두었다. 연구는 설문지를 활용하여 국내 산업체 근로자 887명을 대상으로 하였으며 자료의 수집을 위하여 자원자 패널을 활용한 인터넷 조사를 실시하였다. 분석은 SPSS 25.0과 AMOS 25.0을 사용하여 분석하였다. 연구 결과는 다음과 같다. 첫째, 진성리더십과 직무재창조의 관계를 직무자율성과 무형식학습이 완전매개하였다. 즉, 진성리더십은 직무재창조에 직접적인 영향을 주지 못하지만 직무자율성과 무형식학습에 직접적인 영향을 주며 직무재창조에 간접효과를 주는 것으로 나타났다. 둘째, 직무재창조는 주관적 경력성공의 구성요인인 일과 삶 균형, 고용가능성, 경력만족에 각각 직접적 영향을 주는 것으로 나타났다. 셋째, 직무자율성, 무형식학습, 직무재창조는 진성리더십과 주관적 경력성공의 구성요인인 일과 삶 균형, 고용가능성, 경력만족의 관계를 순차적 매개 하였다. 연구 결과를 바탕으로 직무재창조가 산업체 근로자들의 주관적 경력 성공을 향상시킴으로서 구성원들에게 의미 있는 행동임을 확인하였고, 직무재창조 향상을 위한 진성리더십의 역할을 확인하였다. 따라서 조직은 구성원이 직무수행의 자율성을 보장받고, 다양한 방법으로 무형식학습을 시도할 수 있는 환경이 조성되도록 리더의 진성 리더십 함양을 도모해야 할 것이다. The purpose of this research is to identify the structural relation between authentic leadership, job autonomy, informal learning, job crafting, and subjective career success of industrial workers. A survey with questionnaires was conducted, targeting 887 industrial workers and an internet investigation was undertaken to collect information from volunteer panels. SPSS 25.0 and AMOS 25.0 were selected as analytics tools. The followings are the research outcomes. First, the relation between authentic leadership and job crafting is fully mediated by job autonomy and informal learning. In other words, authentic leadership does not have a direct impact on job crafting, whereas it directly affects job autonomy and informal learning, driving an indirect impact on job crafting. Second, job crafting has a direct effect on the components of subjective career success such as work-life balance, employability and career satisfaction respectively. Third, the relation between authentic leadership and the components of subjective career success such as work-life balance, employability and career satisfaction is consecutively mediated by job autonomy, informal learning and job crafting. The outcomes above indicate that job crafting is meaningful behavior, improving the subjective career success of industrial workers, and authentic leadership plays its role in job crafting. Therefore, organizations are required to ensure that leaders secure their authentic leadership to make sure that their team members have their job autonomy, and to nurture an environment for informal learning in various manners.

『혼불』의 언어와 탈주의 홀로그램

장미영 ( Mi Young Jang ) 영주어문학회 2007 영주어문 Vol.14 No.-

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.