• Journal of the Korea Institute of Information Security & Cryptology
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• v.30 no.3
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• pp.369-378
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• 2020

Due to the widespread use of mobile devices, smartphone penetration and usage rate continue to increase and there is also an increasing amount of data that need to be stored and managed in applications. Therefore, recent applications use mobile databases to store and manage user data. Realm database, developed in 2014, is attracting more attention from developers because of advantages of continuous updating, high speed, low memory usage, simplicity and readability of the code. It also supports an encryption to provide confidentiality and integrity of personal information stored in the database. However, since the encryption can be used as an anti-forensic technique, it is necessary to analyze the encryption and decryption processes provided by Realm Database. In this paper, we analyze the structure of Realm Database and its encryption and decryption process in detail, and analyze an application that supports an encryption to propose the use cases of the Realm Database.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.109-110
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• 2017

모바일 디바이스들의 사용 보편화와 대용량화로 인해 모바일 환경에 적합한 데이터베이스 엔진들이 최근 다양한 목적으로 모바일 기기에 많이 도입되고 있다. 이 엔진들은 대부분 오픈소스 프로그램들이며 범용 데이터베이스에 비해 가볍고 속도가 빠른 장점을 지녀 향후 발전 가능성이 커보인다. 이 논문에서는 안드로이드 등의 모바일 환경에서 대표적으로 활용되고 있는 SQLite 데이터베이스와 Realm 데이터베이스를 선정하여 검색 성능 및 특성을 파악하고 비교하기 위한 성능 실험을 설계한다.

• Journal of Environmental Science International
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• v.21 no.5
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• pp.579-584
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• 2012

Recently, Public Design is being applied at many kinds of urban development. But the application is not carried out well owing to ambiguity of the object of plan. The object of the design and the role from it are based on defining of the realm and type of public design. So, it is necessary to study more about the realm and type of the public design in accordance with the context of the related space and region. Through the analysis of the public design, some points of conclusion have been attained. First, the realm and type of public design is to be more simplified than ever: public facilities and public medium. So, public facilities are to be oriented toward placeness on the one hand, and public medium is to be used for regional marketing on the other hand.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.3
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• pp.625-633
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• 2018

Realm is an open source database developed to replace SQLite, which is commonly used in mobile devices. The data stored in the database must be checked during the digital forensic analysis process for mobile devices because it can help to understand the behavior of the user and whether the mobile device is operating or not. In addition, since the user can intentionally use anti-forensic techniques such as deleting data stored in the database, research on how to recover deleted records is needed. In this paper, we propose a method to recover records that have not been overwritten after deletion based on the analysis of the structure and record and deletion process of the Realm database file.

• Journal of the Korean Society of Clothing and Textiles
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• v.32 no.3
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• pp.418-430
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• 2008

The purpose of this study were 1) to subdivide sportswear consumers according to consuming desire of sports 2) to identify the differences in lifestyle and sportswear benefits sought. The data were collected via a questionnaire from 312 consumer who have been purchased sportswear and living in Seoul. The results of this study were as follows: 1) Sportswear consumers were divided into four segments: sports mania, attractive body pursuers, passive followers, mind purifiers. 2) Six realms of lifestyle such as clothing, food, home & interior, leisure life, consumption and sense of values were factor-analysed separately, and lifestyle factors which showed significant differences among segments are I) fashion ostentation in the realm of clothing ii) western style, health-oriented in the realm of food, iii) sports life enjoyment, sociable life, hoped-for foreign travel in the realm of leisure life, iv) brand oriented, price comparison, sale goods preference in the realm of consumption, and v) realist, interpersonal skills, strong personality, individualism in the realm of values 3) Five factors of sportswear benefits sought which showed significant differences among segments are comfortability/practicality, ideal body/good-looking, individual character, fashion! ostentation, and brand oriented.

• Annual Conference on Human and Language Technology
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• 2020.10a
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• pp.192-196
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• 2020

최근 딥러닝 기술의 발전에 힘입어 오픈 도메인 QA 시스템의 발전은 가속화되고 있다. 특히 IR 시스템(Information Retrieval)과 추출 기반의 기계 독해 모델을 결합한 접근 방식(IRQA)의 경우, 문서와 질문 각각을 연속 벡터로 인코딩하는 IR 시스템(Dense Retrieval)의 연구가 진행되면서 검색 성능이 전통적인 키워드 기반 IR 시스템에 비해 큰 폭으로 상승하였고, 이를 기반으로 오픈 도메인 질의응답의 성능 또한 개선 되었다. 본 논문에서는 경량화 된 BERT 모델을 기반으로 하여 Dense Retrieval 모델 ORQA와 REALM을 사전 학습하고, 한국어 오픈 도메인 QA에서 QA 성능과 검색 성능을 도출한다. 실험 결과, 키워드 기반 IR 시스템 BM25를 기반으로 했던 이전 IRQA 실험결과와 비교하여 더 적은 문서로 더 나은 QA 성능을 보였으며, 검색 결과의 경우, BM25의 성능을 뛰어넘는 결과를 보였다.

• Journal of the Korea Society of Computer and Information
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• v.11 no.3
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• pp.57-66
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• 2006

In this paper. proposes Multi_Kerberos certification mechanism that improve certification service of based on PKINIT that made public in IETF CAT Working Group. This paper proposed to a certificate other realm because search position of outside realm through DNS and apply X.509 directory certification system, to get public key from DNS server by chain (CertPath) between realms by certification and key exchange way that provide service between realms applying X.509, DS/DNS of based on PKINIT, in order to provide regional services. This paper proposed mechanism that support efficient certification service about cross realm including key management. the path generation and construction of Certificate using Validation Server, and recovery of Session Key. A Design of Multi_Kerberos system that have effects simplify of certification formality that reduce procedures on communication.

• International Journal of Advanced Culture Technology
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• v.7 no.3
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• pp.46-51
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• 2019

This study suggests ways to strengthen the expertise by analyzing the problems caused by the lack of expertise of the qualification management body managing the Korean qualifications in the realm of firefighting from the perspective of external signal dependency of capture theory. As a method to prevent the dependency of external signals in capture theory, it is suggested to strengthen the expertise of regulators and strengthening roles and functions of regulator institutions by supplementing education and professional manpower. On this basis, analyzing the problems of qualifications management to the external signal dependency tendency, the researchers in qualification management at the Human Resources Development Service of Korea have a variety of different majors, so understanding and application can be limited if they are working in an unfamiliar area of work. Therefore, in making decisions regarding topics such as policies and roles, suitable alternatives should be found based on external signals. In order to improve this, it is necessary to select firefighting majors in the Korean qualification management of the firefighting realm, to reorganize the job scope to a similar job field of the researcher in charge. It is also necessary to strengthen the expertise of the researcher through various programs, such as mandatory periodic maintenance education in order to understand the work of the researcher.

• Journal of the Korean Data and Information Science Society
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• v.24 no.2
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• pp.257-265
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• 2013

As evaluating the health literacy is getting important, various measures for evaluation are being developed. Nevertheless, discussions about developing proper measures in Korean are still inactive. Therefore in this paper, we proposed Korean REALM (rapid estimate of adult literacy in medicine) measure that is composed of five point scale and investigated about its validity. As a result, we could find that Korean REALM measure which is composed of five point scale has high reliability, and that it formed one dimension as a result of factor analysis. Positive responses were lower than two point scale and correlation coefficient with NVS (the newest vital sign) appeared statistically significant. Therefore, we could conclude that Korean REALM measure that is composed of five point scale is a valid measurement. Furthermore, there were statistically significant differences between general students and department of nursing students about health literacy.

• Asia pacific journal of information systems
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• v.7 no.2
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• pp.225-266
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• 1997

A Causal Transition Model of the IT impact on organization is proposed. The model is based upon the premise that the IT impact is a multi-phase, multi-realm phenomenon, and that the IT impact in one organizational realm logically transpires to another realm, thus forming complex causal webs among them. Two exploratory research studies, the one qualitative and the other quantitative, were conductea to validate the model in a setting involving major structural reorganization of the organizations' IT function. The research results provide support for the general theory structure of the model. The findings include: ⅰ) the IT impact manifests on multiple organizational realms, with different degrees of strength, ⅱ) the impact on the realms follow a particular causal transition path among them, and ⅲ) the IT impact manifests on and through the information processing aspect of work. The results, however, indicate that people's perception of the IT impact is strongly mitigated by the IT relevance of work, and that the organization is affected as much by the structural arrangement surrounding and accompanying the IT as by the technology itself, suggesting that the IT impact is an organizational phenomenon as well as a technological phenomenon. The implications of the research results are discussed at the end.