• 한국컴퓨터정보학회논문지
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• 제20권9호
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• pp.113-119
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• 2015

The purpose of tis study is to analyze the effects of job embeddedness on job burnout related with social worker's turnover. This study suggests some implications for decreasing the level of social worker's job burnout. In this study, embeddedness is composed of three sub-variables like fit, links, and sacrifice. Job burnout is also composed of emotional exhaustion, depersonalization, and decrease of personal accomplishment. Thereafter, research model is established, and study hypothesis is tested through the survey. As a result, it showed that the components of job embeddedness have significant effects on the components of job burnout. Based on the result of this empirical analysis, this study suggested some theoretical and political implications.

• International Journal of Naval Architecture and Ocean Engineering
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• 제1권2호
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• pp.89-94
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• 2009

The current focus of development in industrial Computational Fluid Dynamics (CFD) is integration of CFD into Computer-Aided product development, geometrical optimisation, robust design and similar. On the other hand, in CFD research aims to extend the boundaries of practical engineering use in "non-traditional" areas. Requirements of computational flexibility and code integration are contradictory: a change of coding paradigm, with object orientation, library components, equation mimicking is proposed as a way forward. This paper describes OpenFOAM, a C++ object oriented library for Computational Continuum Mechanics (CCM) developed by the author. Efficient and flexible implementation of complex physical models is achieved by mimicking the form of partial differential equation in software, with code functionality provided in library form. Open Source deployment and development model allows the user to achieve desired versatility in physical modeling without the sacrifice of complex geometry support and execution efficiency.

• Journal of Microbiology and Biotechnology
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• 제25권10호
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• pp.1728-1733
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• 2015

This study was done to establish a mouse model for catheter-related biofilm infection suitable to bioluminescence imaging (BLI). Biofilm formation of Pseudomonas aeruginosa (P. aeruginosa) Xen5 grown on catheter disks in vitro and in an implanted mouse model was real-time monitored during a 7-day study period using BLI. The numbers of integrated brightness (IB) and viable bacterial count (VBC) in the biofilm disks in vitro were highest at 24 h after inoculation; the IB of biofilm in vivo was increased until 24 h after implantation. A statistical correlation was observed between IB and VBC in vitro by linear regression analysis. The actual VBC value in vivo can be estimated accurately by IB without sacrifice. In addition, we monitored the change in white blood cells (WBCs) during infection. The number of WBCs on day 7 was significantly higher in the infection group than in the control group. This study indicates that BLI is a simple, fast, and sensitive method to measure catheter biofilm infection in mice.

• The Journal of Advanced Prosthodontics
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• 제3권2호
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• pp.76-80
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• 2011

PURPOSE. Implant stability quotient (ISQ) values have been supposed to predict implant stability. However, the relationship between ISQ values and bone-to-implant contact ratio (BIC%) which is one of the predictors of implant stability is still unclear. The aim of the present study was to evaluate initial ISQ values in relation to BIC% using rabbit model. MATERIALS AND METHODS. Four New Zealand white rabbits received a total of 16 implants in their tibia. Immediately after implant placement ISQ values were assessed. The measurements were repeated at the time of sacrifice of the rabbits after 4 weeks. Peri-implant bone regeneration was assessed histomorphometrically by measuring BIC% and bone volume to total volume values (bone volume %). The relationships between ISQ values and the histomorphometric output were assessed, and then, the osseointegration prediction model via the initial ISQ values was processed. RESULTS. Initial ISQ values showed significant correlation with the BIC%. The bone volume % did not show any significant association with the ISQ values. CONCLUSION. In the limitation of this study, resonance frequency analysis is a useful clinical method to predict the BIC% values and examine the implant stability.

• 품질경영학회지
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• 제45권3호
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• pp.583-594
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• 2017

Purpose: The purpose of this study is how personal information protection risks affect the intention to use domestic smart banking services. VAM(Value based Adoption Model) model is validated as a theoretical background, selecting ease of use, usefulness and perceived security as a benefit factor, and considers perceived cost, technical complexity, and risk of personal information leakage as a sacrifice factor. Methods: The method of this study used questionnaire survey to collect 365 data on suer's perception on smart banking services, and also performed a structural equation modeling method using by AMOS 23. Results: The result of this paper shows that all hypothesis are accepted statistically significant except 1 hypothesis. Conclusion: This research is concluded that perceived value is affected on statistically positive impact on ease of use, usefulness and perceived security, and negative impact on perceived cost and risk of personal information violation, not statistically technical complexity.

• Advances in pediatric surgery
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• 제4권2호
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• pp.100-109
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• 1998

The anomalous pancreaticobiliary duct union (APBDU) might cause the formation of choledochal cyst and malignancies of hepatopancreaticobiliary system. The purpose of this study is to make an experimental animal model of APBDU similar to that of human. One to two-month-old Mongrel dogs (n=12) were divided into two groups; the control group (n=2) had a sham operation performed, and in the experimental group (n=10) the end of distal ' common bile duct (CBD) was anastomosed to the side of the dorsal pancreatic duct making APBDD. Serum was obtained for chemical analysis on the 10th postoperative day. The dogs were sacrificed at the 5th week (n=3), the 6th week (n=3), the 7th week (n=2), the 8th week (n=2) and the 6th month (n=2) after the experimental surgery. With sacrifice, operative cholangiogram was taken, and bile juice was obtained for chemistry and bacterial culture. The en-bloc specimens of the hepatopancreaticobiliary system were removed for microscopic examination. Serum and bile juice amylase levels were elevated in the experimental group(n=10), but not in the control group(n=2). Operative cholangiograms of control group revealed no evidence of bile duct dilatation.. On the other hand, the bile duct in the experimental group was markedly dilated without any evidence of stenosis at the anastomosis site (n=10). Histologic examination of the hepatopancreaticobiliary system in the experimental group resembled the findings of choledochal cyst in human. The APBDU of this animal model can produce bile duct dilatation by pancreaticobiliary reflux. We think that this animal model can be potentially promising for the research about the APBDU associated hepatopancreaticobiliary diseases.

• 응용통계연구
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• 제23권5호
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• pp.871-882
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• 2010

동물종양 실험에서는 종양발생 시간이 직접 관찰되지 않고 단지 자연사로 인한 관찰 시점이나 강제적으로 희생시킨 시점 이전에 종양이 발생했는지 유무만을 알 수 있다. 이와 같은 형태의 결측을 가진 자료를 분석하기 위해 3단계(건강$\rightarrow$종양발생$\rightarrow$사망) 모형이 널리 사용되고 있다. 본 논문에서는 자연사로 인한 사망 시간이 종속적인 중도절단으로 작용하여 사망 시간과 종양발생 시간이 종속될 때, 이를 모형에 반영하기 위해 감마 프레일티 효과를 도입하였다. 모수 추정은 종양발생 시간과 프레일티 효과의 결측을 다루기 위해 EM 알고리즘 방법을 사용하였다. 제안한 추정량의 소표본 성질을 살펴보기 위해 제안한 방법을 Lindsey와 Ryan (1993, 1994)의 방광암 자료에 적용하여 모수를 추정하였으며, 그 추정값을 바탕으로 모의실험을 수행하였다.

• 한국IT서비스학회지
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• 제20권3호
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• pp.41-56
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• 2021

New drug discovery and development research enable clinical treatment that saves human life and improves the quality of life, but the possibility of success with new drugs is significantly low despite a long time of 14 to 16 years and a large investment of 2 to 3 trillion won in traditional methods. As artificial intelligence is expected to radically change the new drug development paradigm, artificial intelligence new drug discovery and development projects are underway in various forms of collaboration, such as joint research between global pharmaceutical companies and IT companies, and government-private consortiums. This study uses the TOE framework and the Value-based Adoption Model, and the technical, organizational, and environmental factors that should be considered for the acceptance of AI technology at the level of the new drug research organization are the value of artificial intelligence technology. By analyzing the explanatory power of the relationship between perception and intention to use, it is intended to derive practical implications. Therefore, in this work, we present a research model in which technical, organizational, and environmental factors affecting the introduction of artificial intelligence technologies are mediated by strategic value recognition that takes into account all factors of benefit and sacrifice. Empirical analysis shows that usefulness, technicality, and innovativeness have significantly affected the perceived value of AI drug development systems, and that social influence and technology support infrastructure have significant impact on AI Drug Discovery and Development systems.

• 한국ITS학회 논문지
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• 제22권1호
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• pp.291-310
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• 2023

본 연구는 운전자 개입 없이 운행이 가능한 전기차 기반의 자율주행 택시인 로보택시에 대하여 혜택요인과 희생요인을 전반적으로 고려한 가치기반수용모델 기반의 사용자 수용성 영향 요인을 분석하였다. 지각된 혜택(지각된 유용성, 지각된 즐거움), 지각된 희생(기술적 특성, 지각된 비용), 사용자 경험(차량공유서비스, 택시, 자율주행자동차, 자가용)을 독립변수로 최종 선정하여, 경기도민 429명을 대상으로 지각된 가치 및 수용 의도에 미치는 영향을 확인하였다. 연구 결과, 지각된 혜택 요인에 해당하는 지각된 유용성과 지각된 즐거움, 지각된 희생 요인에 해당하는 지각된 비용이 유의한 영향을 미치는 것으로 확인되었으며, 지각된 가치는 로보택시 수용 의도에 영향을 미치고, 일부 사용자 경험이 지각된 혜택 요인에 유의한 영향을 미치는 것으로 나타났다. 본 연구는 가치기반수용모델 결과를 로보택시 활성화를 위한 서비스 설계에 접목시킬 수 있는 중요한 의미가 있으며, 나아가 연구 결과를 효과적으로 이용하기 위한 이론적 근거를 제공할 수 있다.

• 시큐리티연구
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• 제32호
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• pp.7-32
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• 2012

이 연구는 최상의 경호수행을 위해서 경호원이 갖추어야 할 경호무도의 정신요인에 대하여 분석적 계층화과정(AHP) 기법을 활용한 상대적 중요도를 평가하는 것에 목적이 있다. 연구 참여자는 경호학 전공자와 경호 관련 종사자, 그리고 경호이론 및 실기전문가 540명을 선정하였다. 정신특성에 대한 요인추출 단계에서는 문헌고찰을 통해서 수집된 자료를 활용하여 탐색 및 확인적 요인분석을 실시하였다. 이렇게 확인된 정신개념구조를 활용하여 요인 간 상대적 중요도를 전문가 설문을 통해 실시하였다. 통계처리는 SPSS 18.0 for windows와 AMOS 5.0 그리고 Expert Choice 2000을 활용하였다. 이러한 과정을 통해서 결론을 내리면 다음과 같다. 첫째, 경호무도 정신특성과 관련한 요인탐색 결과 4개의 일반요인과 20개 세부요인을 탐색할 수 있었다. 탐색된 요인의 구인타당성을 확인한 결과 모든 기준치에서 안정적인 값을 가지는 것으로 나타났다. 즉 경호무도의 정신특성 개념의 구인은 타당하다고 평가할 수 있다. 이러한 경호무도 정신개념의 일반 요인에 대한 명명화 과정을 통해서 심리관련, 사상관련, 무도관련, 실천관련 정신으로 구성하였고, 심리관련 정신 요인은 집중, 자신감, 자기관리, 몰입, 자부심(자존감)으로, 사상관련 정신 요인은 희생, 정의, 충성, 인류평화, 사명감으로, 무도관련 정신 요인은 예의, 강인, 호신, 심신일여, 용맹(기)으로, 실천관련 정신 요인은 책임, 협동, 겸손, 결단, 프로정신으로 구성하는 것이 타당하다는 결론에 도달했다. 둘째, 경호무도의 위계모형은 4개의 상위 개념과 20개의 하위개념으로 구성하였다. 이러한 경호무도 정신특성 위계모형을 토대로 상대적 중요를 평가한 결과 사상관련 정신(.482), 무도관련 정신(.248), 실천관련 정신(.188), 심리관련 정신(.083) 순으로 중요도가 판명되었다. 그리고 하위개념에 대한 경호무도의 정신특성에 대한 중요도는 희생(.252), 예의(.110), 사명감(.108), 책임(.073), 충성(.053), 강인성(.052), 정의(.049), 호신(.038), 프로정신(.038), 결단(.035), 협동(.029), 자신감(.026), 용맹(기)(.025), 자부심(자존감)(.024), 심신일여(.023), 인류평화(.019), 집중(.014), 겸손(.013), 자기관리(.011), 몰입(.007) 순으로 중요도가 판명되었다. 즉 경호무도는 희생, 정의, 충성, 인류평화, 사명감과 같은 사상관련 정신 요인이 가장 중요한 요인이라고 평가할 수 있다.