편재형 컴퓨팅 환경에서의 e-비즈니스 응용을 위한 분할 동기화 이동 트랜잭션 처리 모델

최미선,김영국,Choi, Mi-Seon,Kim, Young-Kuk 한국정보처리학회 2004 정보처리학회논문지D Vol.11 No.4

제한된 무선통신 대역폭 및 불완전한 무선통신 인프라, 이동 단말기의 배터리 용량 등과 같은 이동 컴퓨팅 환경의 고유한 특성으로 인해 이동 단말기에서 실행되는 e-비즈니스 응용은 잦은 접속단절에 직면하게 된다. 또한 고가의 무선통신 비용이나 잦은 무선 통신으로 인해 급격하게 소모되는 이동 단말기 전력을 절약하기 위해 자발적인 접속단절 상태에서 동작하기도 한다. 본 연구에서는 데이터비축을 이용하여 대부분 접속 단절 상태에서 이동 단말기에서 자치적으로 이동 트랜잭션을 처리하면서도 데이터 중복과 네트워크 분할로 인해 발생가능한 일관성 문제를 효율적으로 해결할 수 있는 분할 동기화 이동 트랜잭션 모델을 제안한다. 분할 동기화 이동 트랜잭션 모델은 이동 트랜잭션을 컴포넌트 단위로 분할한 후, 서버에서의 사용 가능성과 충돌 가능성을 고려하여 컴포넌트 트랜잭션들로 동기화 우선순위를 할당하고 우선순위가 높은 컴포넌트 트랜잭션들부터 동기화를 우선 실시하여 부분 결과를 공개한다. 결과적으로 이동 클라이언트에서 변경한 데이터에 대한 서버에서의 가용성을 높이고, 중요도가 낮은 부분은 이동 단말기의 제한된 자원 및 무선 대역폭과 고가의 통신 요금 등을 고려하여 서버에 늦게 반영함으로써 무선 대역폭 및 컴퓨팅 자원의 활용도를 극대화시키는 효과를 기대할 수 있다. An e-business client application in ubiquitous mobile computing environment may become disconnected from the enterprise server due to broken communication connections caused by the limitation of mobile computing environments(limited battery life of the mobile device, low bandwidth communication, incomplete wireless communication infrastructure, etc). It Is even Possible that mobile client application Intentionally operates in disconnected mode to reduce communication cost and the power consumption of the mobile device. We use “data hoarding” as a means of providing local autonomy to allow transactions to be processed and committed on the mobile host despite of disconnection. The key problem to this approach is the synchronization problem that serialize potentially conflicting updates from disconnected clients on master objects of the server database. In this paper, we present a new transaction synchronizing method that splits a transaction into a set of independent component transactions and give the synchronization priority on each component taking the possibility of use and conflicts in the server into consideration. Synchronization is performed component by component based un synchronization priority. After the Preferred component of a no bile transaction succeeds in synchronization with the server, the mobile transaction can pre-commit at server. A pre-committed transaction's updated value is made visible at server before the final commit of the transaction. The synchronization of the component with low synchronization priority can be delayed in adaption to wireless bandwidth and computing resources. As a result, the availability of important data updated by mobile client is increased and it can maximize the utilization of the limited wireless bandwidth and computing resources.

노인대상프로그램의 심리적 효과와 관련된 변인에 대한 메타분석

최미선,송병주,Choi, Mi-Seon,Song, Byung-Joo 한국임상보건과학회 2016 한국임상보건과학회지 Vol.4 No.1

Purpose. This study aims to present basic data to develop programs suitable to the characteristics of elderly people through a meta-analysis of effectiveness of variables related to psychological effects of programs of elderly people conducted in past 15 years. Methods. The analysis subjects are total 229 articles related to the psychological effects of programs for elderly people and submitted for master or doctor degrees or published in academic journals. CMA2 is used for the analysis. Results. The results of this study shows lower variables of the psychological effect promoting factor group that are highly effective for Life Satisfaction, Self-Efficacy, Self-Respect and Self-Integration and lower variables of suppressing factor group that are highly effective for Loneliness, Tension, Weakness, Anger and Depression. For the effect scale of psychological effect promoting factors, Arts is shown to be the highest followed by Exercise, Consultation, Recollection, Others and Recreation in order. For the effect scale of suppressing factors, Consultation is shown to be the highest followed by Recollection, Arts, Exercise, Others and Recreation) in order. Conclusions. This study has its own meaning for establishing integrated factors of psychological effects of programs for elderly people and presenting realistic data for planing programs suitable for various desires of elderly people.

서비스산업에서 고객만족이 재무성과에 미치는 영향: 환대기업과 비환대서비스기업의 비교를 중심으로

최미선 ( Mi Seon Choi ) 한국고객만족경영학회 2015 고객만족경영연구 Vol.17 No.4

경영환경이 급속하게 변함에 따라 많은 기업들에게 있어서 고객만족은 경쟁우위 획득을 위한 핵심가치로 인식되고 있다. 이에, 본 연구에서는 서비스기업을 환대기업과 비환대서비스기업으로 분류하고 고객만족이 재무성과에 미치는 영향의 유의미성을 환대기업, 비환대서비스기업 각각에 대하여 검증하였다. 또한, 조절효과 검증을 통해 환대기업과 비환대서비스기업 간의 고객만족이 재무성과에 미치는 영향력의 크기의 차이를 검증하였다. 분석 결과에 따르면, 환대기업의 고객만족은 재무성과에 정(+)의 유의미한 영향을 미치고, 조절효과를 검증한 환대기업에 있어서 고객만족이 재무성과에 미치는 영향력의 크기는 비환대기업의 경우보다 큰 것으로 나타났다. 결론적으로 환대산업에서 고객만족은, 비환대서비스산업의 경우보다, 경쟁우위 획득을 위한 더욱 중요하게 고려해야 할 핵심요소임이 입증되었다. As the business environment has rapidly changed, customer satisfaction in many firms has been recognized as the core value for achieving competitive advantage. Thus, in this study, we classified the service firms into hospitality firms and non-hospitality service firms, and then examined the significance of the effects of customer satisfaction on firm performance for each of hospitality firms and non-hospitality service firms. We also examined the size difference of the effects of customer satisfaction on firm performance between each hospitality firms and non-hospitality firms through examining the moderating effect. The results show that while the effect of customer satisfaction for hospitality firms on firm performance is positive and significant, according to the moderating effect analysis, the size of the effect of customer satisfaction on firm performance for hospitality firms is greater than non-hospitality service firms. In conclusion, compared to the non-hospitality service industry, customer satisfaction in the hospitality industry is proven to be a more critical key factor for gaining competitive advantage.

항공법,정책 : 우리나라 항공인력양성 사업의 평가지표 개발에 관한 연구

최미선 ( Mi Seon Choi ),김형성 ( Hyung Seong Kim ) 한국항공우주법학회 2012 한국항공우주정책·법학회지 Vol.27 No.2

항공 산업은 고용창출 효과가 크고 고부가 가치인 선진국 형 지식기반 산업으로 평가되는 대표적 산업이다. 이러한 시대흐름에 따라 전 세계가 잠재적 경제력의 한축인 항공 산업에 눈을 돌리고 있는 것도 어찌 보면 당연한 일이 아닐 수 없다. 이와 같은 배경 하에 본 연구는 국토해양부에서 범정부적으로 추진 중인 항공인력양성사업의 중요성을 인식하고 급속히 발전하는 항공기술에 대처할 수 있는 항공우주기술 인력 및 잠재적 경제력의 한 축인 항공시장의 전문지식과 실무능력을 겸비한 국제항공 전문가를 석사급 인력을 국내 특성화 대학을 선정 지원하여 항공인력을 양성하는 사업의 평가지표를 개발하는 데 그 필요성을 인식하고, 항공전문가의 검토를 통한 타당성 검증 결과를 도출하였다. Aviation industry is known as the knowledge-based one and as an advanced nations` exclusive property having a large capacity for creating job and added value. Considering the current status of the aviation industry as aforesaid, it is natural for all countries to turn their attention to such promising aviation industry. At the time of rapid growth in aviation market, the importance of securing managerial experts and technicians is being under the spotlight as the aviation profession is increasingly in demand. To meet such dire needs that have already become an ever-greater part of the industry, collaboration among governmental, educational and industrial parties has formed in preparation for putting us into so-called an era of globalization. Having recognized the significance of the program, carried forward by The Ministry of Land, Transport and Maritime Affairs, fostering human resources in civil aviation, the objective of this study lies on deloping indicators for the programofficially designed to produce men of expertise in international air transport, the market of which forms nowadays a large part of national economy, and the technology of which develops so quickly. In this paper, an effort is made to develop the appraisal indicators and to set up standards thereof in order for the program to be systematically and expertly assessed on the basis of Quinn and Rohrbaugh`s the competing values model. Firstly, this paper designs appraisal indicators, taking into account the peculiarity and environment of air transport industry, for developing human resources in civil aviation by utilizing advanced research on educational assessment in general due to the absence of applicable preceding studies regarding the development of human resources in civil aviation. Secondly, investigations into the necessity and validity of the appraisal are committed by analyzing answers from 100 respondents to questionaires and oral surveys in order to verify appraisal indicators designed in accordance with the competing values model. Lastly, the paper analyzes in a demographical way discrepancy in the recognitions among institutions for which the respondents work, on the basis of the outcome of the survey. As a result, the discrepancy is found not significant, which indicate that the aviation experts favour the indicators as appraisal standards. Prospective studies on the same issue may need an in-depth analysis, empowered by sufficient sampling in balance, of correlation between independent variables, then hopefully serve as a momentum for advancement of study in civil aviation.

Usefulness of X-ray Guided Biopsy and Ultrasound Guided Biopsy in Breast Microcalcification Biopsy

최미선(Mi seon Choi),송종남(Jong nam Song) 한국방사선학회 2016 한국방사선학회 논문지 Vol.10 No.3

유방암에 관한 사회적인 관심이 증가되고 있는 가운데 진단의 가장 기본이 되는 검사는 유방 X선 촬영과 유방 초음파 검사이다. 특히 유방 미세석회화는 조직학적 진단을 필요로 하며 유방 미세석회화 조직검사를 시행하고 있다. 이에 미세석회화 진단에 기본이 되는 X선 유도 하 조직검사(needle localized open biop sy)와 초음파 유도 하 조직검사(sono guided core needle biopsy)를 분석하여 평가하고자 한다. 유방 미세석회화를 주소로 내원한 환자에서 확대 촬영을 시행한 241예를 대상으로 X선 유도 하 조직검사(needle localized open biopsy)와 초음파 유도 하 조직검사(sono guided core needle biopsy)의 연령대 별 분포와 병소의 위치를 분석하고 확대촬영 시행 후 이루어진 검사를 분류해서 X선 유도 하 조직검사와 초음파 유도 하 조직검사의 빈도를 분석하고 악성과 양성의 결과를 확인 하였다. 그 결과 X선 유도 하 조직검사(needle localized open biopsy)가 64예(26.6%)로 초음파 유도 하 조직검사(sono guided core needle biopsy) 12예(4.9%)에 비해 5.4배 높은 것으로 나타났다. 초음파 장비의 발달과 입체정위 흡입법(stereotactic vacuum-assisted biopsy)등의 발달로 미세석회화의 조직학적 진단방법이 다양해지고 있지만, 각각 검사의 특성과 한계점을 고려해 볼 때 X선 유도 하 조직검사(needle localized open biopsy)가 유방 미세석회화 병변에서는 정확한 조직학적 진단을 제공한다고 사료된다. Social interest in breast cancer has increased. The most basic exams for diagnosis include breast X-ray and breast ultrasound. In particular, breast microcalcification requires histological diagnosis, and breast microcalcification biopsy is commonly performed. Therefore, this study aimed to analyze and assess X-ray guided biopsy (needle localized open biopsy) and ultrasound guided biopsy (sono guided core needle biopsy), which are basics in diagnosis of microcalcification. Targeting 241 cases in which magnification mammography was performed for patients who visited the hospital due to breast microcalcification, age distribution and the location of lesions were analyzed in X-ray guided biopsy and ultrasound guided biopsy. By classifying exams performed after magnification mammography, the frequencies of X-ray guided biopsy and ultrasound guided biopsy were analyzed, and malignant and benign results were confirmed. The results showed that 64 cases(26.6%) were X-ray guided biopsy, which was 5.4 times higher than 12 cases(4.9%) of ultrasound guided biopsy. Due to development of ultrasound equipments, stereotactic vacuum-assisted biopsy, etc. the methods of histological diagnosis of microcalcification have become diverse, but when considering characteristics and limitations of each exam, X-ray guided biopsy is thought to be most accurate and useful.

국내 호텔종사자의 성격 5요인이 조직시민행동에 미치는 영향 및 직무스트레스의 조절효과에 관한 연구

최미선(Choi, Mi Seon),김준호(Kim, Joon Ho) 한국서비스경영학회 2015 서비스경영학회지 Vol.16 No.3

In this study, we reviewed the effects of the Big 5 personality traits on organizational citizenship behaviors(OCB) and the moderating effect of job stress on the relationship between the Big 5 personality traits and OCB. Using a multiple regression analysis and a moderated regression analysis, this study found that while conscientiousness and agreeableness among the personalities are positively and significantly associated with OCB, emotion stability(neuroticism) is negatively and significantly related with OCB. And, the results showed that the effects of openness and extraversion on OCB are insignificant. Finally, this study found that job stress has a negative moderating effect on the relationships between conscientiousness and OCB, agreeableness and OCB, openness and OCB, and extraversion and OCB, respectively. This study’s findings implied that job stress may be dealt with differently according to personality traits of front-line service providers and OCB can be improved through the active management considering the moderating effect of job stress on the relationship between each personality trait and OCB.

성격 5요인과 직무열의 사이에서 감정노동의매개효과에 관한 연구

최미선(Choi, Mi Seon),송상호(Song, Sang Ho) 한국서비스경영학회 2014 서비스경영학회지 Vol.15 No.2

In this study, we examined the effects of the Big 5 personality factors with emotional labor(surface acting and deep acting) and the effects of emotional labor with job engagement focused on front-line service providers at hotel. In addition, we examined the mediating role of emotional labor between the Big 5 and job engagement. Using structural equation modeling, the emotion stability(neuroticism) of the personality`s negative emotion facet was related positively to surface acting and the extraversion, openness, agreeableness, conscientiousness of the positive emotion facets were related positively to deep acting. Surface acting had no relation with job engagement, but deep acting had a relation with job engagement. Using three-step mediated regression analysis, mediating effect of emotional labor was proved. Our findings offered the positive personality factors such as extraversion, openness, agreeableness, conscientiousness were related positively to deep acting and then influenced positive working attitude such as job engagement for the front-line service providers.

로그 기반 백업 및 안정기억장치를 이용한 주기억장치 DBMS 에서의 회복기법

최미선(Mi-Seon Choi),김영국(Young-Kuk Kim) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.1B

메모리 기술의 발전은 주기억장치 데이터베이스가 널리 사용될 수 있는 토대를 마련하였다. 주기억장치 데이터베이스에서는 주기억장치의 휘발성으로 인해 시스템이 파손될 경우 모든 데이터들을 잃어버리게 되므로 데이터베이스를 일관된 상태로 복구시켜주는 회복기법이 매우 중요하다. 본 논문에서는 비휘발성 메모리이면서도 RAM과 같이 빠른 접근속도를 가지는 FRAM과 같은 고성능 비휘발성 메모리를 이용하여 그림자 갱신과 로그 기반 백업을 실시함으로써 시스템 파손 후, 빠른 복구를 제공하면서도 기존의 로그 기반 백업이 가지는 문제점을 해결하는 회복기법을 제안한다.

Ti-Ni형상기억합금의 생체활성에 미치는 표면처리의 영향

최미선 ( Mi Seon Choi ),남태현 ( Tae Hyun Nam ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.12

Research into the replacement of injured systems and tissue in the human body is advancing rapidly. Recently, Ti-Ni shape memory alloys have shown excellent biofunctionality related to their shape memory effect and superelasticity. In this study, the effect of an acid or an alkali treatment on the bioactivity in 49Ti-Ni and 51.5Ti-48.5Ni alloys is investigated in an effort to utilize Ti-Ni alloy as a biomaterial. In addition, the biocompatibility in a SBF solution is assessed through in vitro testing. A porous surface was formed on the surface of both alloys after a chemical treatment. According to the in vitro test, apatite formed on the surfaces of both alloys. The forming rate of apatite in the Ti-rich alloy was faster that in the Ni-rich alloy. The formation of apatite provided proof of the bioactivity of the Ti-Ni alloy. A small quantity of Ni was eluted at the initial stage, whereas Ni was not found for 12 days in the Ti-rich alloy and for 8 days in the Ni-rich alloy. In the case of the treated 51.5Ti-Ni alloy, the shape memory property was worsened but the biocompatibility was improved.

AHP를 활용한 국내항공사 객실승무원 채용 기준의 우선순위 분석에 관한 연구

최미선(Choi, Mi-Seon) 한국호텔외식관광경영학회 2021 호텔경영학연구 Vol.30 No.5