• Journal of the Korea Society of Computer and Information
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• v.15 no.7
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• pp.67-74
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• 2010

TIn this paper, it is designed the polarization selective antenna for UHF RFID system. The proposed antenna is consist of microstrip patch antenna with dual feeding and two SPDT switches and a SP4T switch and 3dB hybrid coupler. Through control of voltage of switches, the proposed reader antenna can select horizontally linear polarization, vertically linear polarization, left-hand circular polarization (LHCP) and right hand circular polarization (RHCP). The proposed reader antenna satisfied 2:1 VSWR at 902MHz~928MHz. and it has under 3dB AR(axial ratio). Peak gain of antenna is 7.71dBi, 7.55dBi with linear polarization and 7.31dBic, 7.81dBic with circular polarization at x-y plane. Also Axial ratio of antenna is 2.01~2.83dB and 2.02~2.60dB respectively. It is satisfied 3dB axial ratio.

• Journal of Korean society of Dental Hygiene
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• v.22 no.3
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• pp.181-188
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• 2022

Objectives: This study aimed to estimate the influences of leader's political skills (LPS) on job satisfaction and organizational commitment in dental hygienists. Methods: A self-administrated questionnaire was conducted form April 1 to May 31 2020 by 209 dental hygienists in Seoul, Busan and South Gyeongsang. LPS, job satisfaction, organizational commitment were evaluated on the LPS scale, job descriptive index (JDI) and organizational commitment scale, respectively, each on five-point scale. Data were subjected to descriptive analysis, t-test, one-way ANOVA, pearson correlation and multiple linear regression analysis. Results: The overall LPS, job satisfaction and organizational commitment level of subjects were 3.53±0.63, 3.18±0.51 and 3.27±0.63. The influential factors for LPS, job satisfaction and organizational commitment were Networking ability (subcategory of LPS). Conclusions: Leaders should use the knowledge and activities newly introduced from various networks to fit the dental hospital so that members can display their more professional abilities to increase job satisfaction and organizational commitment.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.7 no.3
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• pp.75-87
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• 2012

The goals of this study are to identify perceived leadership competency effects on job satisfaction, organizational commitment and to verify the moderating effects of psychological empowerment in the relationships between leadership competency and job performance through empirical survey. To achieve the goals, 331 questionnaires were analyzed with spss 18.0. The results of the survey can be summarized as follows. Leadership competency has positive effect on impact, self-efficacy, self-determination, meaning, which are subdivision of psychol. The goals of this study are to identify perceived leadership competency effects on psychological empowerment, and the higher leadership competency is perceived, the more positive effect it has on job performance. In the survey on the effectiveness of empowerment on job performance, it has partial positive effect. The hypothesis that empowerment moderates the relationships between leadership competency and job satisfaction was not accepted, between leadership competency and organizational commitment was partly accepted This study provides academic and practical implications by investigating modulating factors of leader's competency and effects of psychological empowerment the different level.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.951-954
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• 2006

RFID시스템은 태그와 리더, 백엔드DB로 구성되는 무선인식시스템으로 용도와 기능, 크기에 따라 다양하지만 가장 널리 사용될 것으로 예상되는 것은 저가 수동형 태그로 향후 바코드시스템을 대체할 것으로 기대된다. 이러한 RFID시스템은 적법한 리더와 태그에게 정보를 전달해서 도청자로부터 통신을 방해받지 않아야 하고, 원하지 않는 태그 정보의 노출로 인한 개인 프라이버시 침해를 방지할 수 있어야 한다. 본 논문에서는 불특정다수가 이용하는 많은 양의 아이템을 취급하는 공공도서관에서 RFID시스템을 도입함에 따라 예상되는 개인 프라이버시 침해를 방지하기 위해 보안 요구사항을 만족하면서 시스템 사용 환경에 맞는 프라이버시 보호 방식을 제안한다.

• The KIPS Transactions:PartA
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• v.10A no.4
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• pp.405-410
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• 2003

In this paper, we have designed and implemented an E-Book Exchange System which is based on the Open E-Book Exchange protocol of Open E-book forum. The ebook is described digital contents composed of variable media and should require secured ebook server for copyright guarantee. Also, contents manufactures, circulation company, and user must access the ebook contents easily. So, Linux-based ebook server and reader can satisfy this requirements. Therefore, this research has developed Linux-based ebook server and reader which is cost-effective.

• Electronics and Telecommunications Trends
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• v.23 no.2 s.110
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• pp.142-152
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• 2008

모바일 RFID 환경이란 휴대전화가 RFID 리더를 가지고 있어서 사용자가 자신의 휴대전화를 통해 RFID 태그가 부착된 제품의 정보를 손쉽게 얻을 수 있는 환경을 의미한다. 모바일 환경에서 사용되는 RFID 기술은 고정형 RFID 리더를 사용하는 환경과는 다른 사용자 요구사항 및 보안 요구사항이 존재한다. 모바일 RFID 기술에 특화된 국제 표준화 논의가 2007년 상반기부터 본격적으로 논의되고 있다. 따라서 모바일 RFID 보안기술은 모바일 RFID 전체 프레임워크와 호환성을 유지하면서 모바일 환경의 요구사항을 만족하는 방향으로 표준화가 진행되어야 한다. 본 고에서는 모바일 RFID 기술의 표준화 동향을 살펴보고, 모바일 환경을 고려한 모바일 RFID 보안 프레임워크 및 인증, 키 관리, 데이터 보호, 프라이버시 보호 등의 모바일 RFID 보안 서비스를 설명한다. 그리고 이러한 보안 서비스를 제공하기 위해 필요한 표준화 대상을 제안하고, 표준화 대상에 대한 기술 개발과 지적재산권 확보 및 이를 연계한 국제표준화 추진 전략을 설명하며 결론을 맺는다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.1177-1179
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• 2010

RFID는 태그가 부착된 사물의 정보를 무선통신을 통해 인식하는 기술로써 바코드를 대체하는 등 다양한 영역으로 응용 범위가 확대되고 있다. 따라서 각 응용에 필요한 보안 문제도 중요시 되고 있다. 본 논문에서는 지금까지 RFID시스템의 보안 취약성을 해결하기 위해 제안된 많은 인증 프로토콜들 중 한국정보통신기술협회에서 제정한 잠정표준인 "수동형 RFID 보안태그와 리더의 인증 및 데이터 보호 프로토콜"에 대하여 프라이버시 침해, 위치추적, 비동기화 공격 가능 및 전방향 안전성을 만족하지 못하는 등의 보안 취약점이 있음을 보이고, 이에 대한 분석을 하였다.

• Journal of Convergence for Information Technology
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• v.10 no.11
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• pp.64-76
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• 2020

The purpose of this study is to empirically analyze the mediating effect of job stress and Job engagement in job satisfaction between WFC(Work-Family Conflict) and quality of LMX(eader-member exchange) relationship of married female workers based on JD-R(Job Demands-Resources) model. A total of 945 people were targeted using the 7th panel data from the Korean Longitudinal Survey of Women and a structural equation model was used to verify the causal relationship and mediating effect of each variable using spss 23.0 and AMOS 21.0. As a result of the study, it was confirmed that WFC did not directly affect job satisfaction, and it was found that job satisfaction was negatively affected through job stress related to WFC. It was found that the quality of the LMX relationship had a positive effect on job satisfaction and reduced job stress, thus positively affecting job satisfaction. Job engagement was found to mediate the relationship between LMX and job satisfaction. This study is meaningful in that the search for multidimensional psychological and contextual factors that lead to job performance and job demands of married female workers are conducted.

• Korean Security Journal
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• no.14
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• pp.1-19
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• 2007

Recently the demand for civil bodyguards and security guards shows rapid growth with social development that lead the social structure environment. In recent years, the security industry and market seems to be increasingly affected by new social environment changes. In addition to that, efficient management for the private security needs to many security managers. So, the management for the private security is a matter of primary concern to all security managers. The purpose of this research is to apply efficient management for the private security and how security managers leadership type effects on working attitude for guards. Then, this study is composed of the introduction in the first chapter, theological consideration of leadership and working attitude in the second chapter, research application in the third chapter and finally the conclusion in the fourth chapter. For the security managers, the organization can be altered its efficiency by organizing groups applying what kind of leadership to how it wed. Considering to its characteristic of security organization, the leadership is not only important factor effecting on outcome of organization but also core activity achieving the goal of organization to private security managers.

• Journal of Digital Convergence
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• v.13 no.12
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• pp.125-134
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• 2015

Business organizations need to introduce trans-oriented response way and efficient management skill to survive in these days of severe struggle for existence. The new management models now ask organizations for building a new employee-employer relationship. As the economic recession continues and consumption shrinks around the world, many companies are in trouble. Companies will fall behind in the market unless they respond to this seamless and fast-changing business environment and market in a structured fashion. Therefore, the importance of leadership is growing bigger and bigger. This study reviewed prior literatures dealing with the servant leadership and surveyed workers in the service industry. Resultingly, it was found that servant leadership had positive effects on organizational commitment and organizational citizenship behavior, and that the superior's trust affected the effect of servant leadership on organizational commitment.