• 정보보호학회지
• /
• 제30권5호
• /
• pp.45-54
• /
• 2020

최근 주요정보통신기반시설 대상의 사이버 공격이 급격하게 증가하고 있다. 특히, 발전시설 주요정보통신기반시설에 사이버 공격 발생 시 전력 공급 중단으로 인하여 대규모 정전사고가 발생할 수 있다. 따라서, 발전시설 대상의 사이버보안 관리가 중요하며, 주기적인 사이버보안 평가가 필요하다. 미국 EPRI(Electric Power Research Institute)에서 발전시설 대상 사이버 보안조치 평가 방법론인 TAM(Technical Assessment Methodology)을 개발하였고, 최근 아랍에미리트(UAE, United Arab Emirates) 바라카(Barakah) 원자력발전소에서 사이버보안 평가를 위해 TAM을 활용하였다. 본 논문에서는 발전시설 사이버보안 평가 방법론인 TAM을 분석하고, 국내 발전시설 사이버보안 평가에 활용 방안을 제시하고자 한다.

• International Journal of Contents
• /
• 제14권3호
• /
• pp.32-38
• /
• 2018

This study examined the factors influencing the intention to use smartwatches using the integrated model of technology acceptance model (TAM) and innovation diffusion theory (IDT). An online survey was conducted and the data were analyzed using the structural equation modeling (SEM). The results showed that the research model had an acceptable fit, and all paths, except for the one from the perceived ease of use to the intention to use, were supported. Regarding paths from IDT to TAM, it was observed that higher the compatibility, the users perceived greater usefulness. Additionally, both observability and trialability influenced the perceived ease of use. However, perceived ease of use affected the intention only through the mediated effect of perceived usefulness. The implication of the study lies on the major focus on the effects of users' perceptions regarding innovative characteristics of smartwatches on the intention to adopt and attempted to increase the explanatory power of the TAM and IDT by combining both.

• 한국정보시스템학회지:정보시스템연구
• /
• 제14권1호
• /
• pp.149-169
• /
• 2005

The purpose of this study is to investigate as individuals how and why to accept web storage service. Using the Technology Adoption Model2 (TAM2) as methodological framework, this research tries to experiment an empirical background on the acceptance of behavioral changes of an individual sa to information technological advances. The findings of this study are different from TAM2 in terms of job relevance and output quality. However, according to other elements of TAM2 such as result demonstrability, subjective norm, image, this srudy also confirms positive relationships toward technological acceptance. Especially, subjective norms shows the strongest influential factors when adopting technological changes.

• Bulletin of the Korean Chemical Society
• /
• 제30권11호
• /
• pp.2608-2612
• /
• 2009

The unequivocal solid-state structure and stereochemistry of the hetaryl leuco-TAM dye, 2,2’-(2-phenyl propane- 1,3-diylidene) bis(1,3,3- trimethylindoline) derivatives were established using X-ray single crystal analysis. The X-ray crystal analysis showed that the (Z, E)-isomers only formed stereoselectively, with a so-called “threebladed propeller” conformation, from the reaction of a Fischer base and benzaldehyde derivatives. These isomers were stacked in a juxtaposition to form a dimer or a double dimer, adopting either a triclinic, with P-1, or monoclinic crystal system with a space group P21/n in the unit cell of the crystal.

• 한국IT서비스학회지
• /
• 제7권4호
• /
• pp.21-43
• /
• 2008

This paper develops the research model for the understanding of learner's usage intention in web based collaborative learning(WBCL) system. This model is based on the Davis' Technology Acceptance Model(TAM) and Social Interactivity Theory. Data is collected 225 University students from two different institutions. They were divided into 46 groups and asked to complete an online TOEIC preparation module using WBCL systems over 4 weeks. Data were collected at three points for each participant-before, 3 weeks after, and at the end of the online module. The result show that TAM based Belief factors(Usefulness, Ease of use, Playfulenss) are important determinants of usage intention in WBCL systems. The study also found the external factors of the extended TAM to be subjective norm, leader's enthusiasm in WBCL context.

• 한국정보기술응용학회:학술대회논문집
• /
• 한국정보기술응용학회 2004년도 춘계학술대회 디지털 컨버젼스(Digital Convergence)와 경영혁신
• /
• pp.71-71
• /
• 2004

• 한국정보시스템학회지:정보시스템연구
• /
• 제13권2호
• /
• pp.22-48
• /
• 2004

Information systems that are not used cannot be useful. In order to increase user acceptance, it is necessary to understand why people accept or reject information systems. Technology Acceptance Model(TAM) is one of the most influential research models for studying determinants how users accept information systems. Recently, Knowledge Management Systems(KMS) have become important components of corporate systems as the foundation of industrialized economics has shifted from natural resources to knowledge assets. This paper applies TAM to investigate users' acceptance of KMS in public administration institutions. It sampled 182 users who had experience in using KMS. Many empirical researches have suggested that TAM can be integrated with other organizational theories to improve its predictive and explanatory ower. We extended the basic TAM by the integration of appraisal and reward satisfaction theory. There are many external variables that influence the perception and the belief of system users. We introduced two external variables(job characteristics, IT self-efficacy) and one additional perception variable, perceived appraisal and reward(PAR) in the basic TAM model. The LISREL model analysis is used for finding out the causality among variables and testing the model fitness. As result, The IT self-efficacy influences to the perceived ease of use(PEOU) and the PAR, and the PEOU influences directly to the perceived usefulness(PU), the PAR, and the attitude toward KMS. The KMS participation intention(PI) was influenced by the PAR and the attitude directly,andbythePEOUindirectly. Finally, this paper suggests some guidelines for the adoption of KMS in public sectors on the basis of the study results.

• 한국콘텐츠학회논문지
• /
• 제14권9호
• /
• pp.538-555
• /
• 2014

빅데이터와 관련 기술에 대하여 학계, 산업계, 공공의 관심이 크지만 아직까지 빅데이터 기술수용에 대하여 체계적으로 연구된 사례는 매우 드물다. 본 연구는 국내 초기 시장인 빅데이터 기술수용 연구를 위해 기술수용모델(TAM)을 중심 틀로 혁신확산이론(Innovation Diffusion Theory) 및 과업기술적합성(Task Technology Fit)이론을 통합적으로 활용하여 연구모형을 설정하였으며 빅데이터 기술 수용의 목적성을 기술수용모델의 조절변인으로 확장하였다. 연구결과 '주관적 규범'과 '과업기술적합성'이 TAM의 외생변인으로 가장 크게 영향을 가졌으며 기술기반의 새로운 서비스나 상품을 기획하고 개발하고자 하는 목적의 '기술활용자' 집단에게 '조직의 혁신성향'은 기술의 수용의도에 영향을 미치는 유의한 외생변인이나 단순히 기술을 이용하고자 하는 '기술이용자' 집단에게는 오히려 '주관적 규범'이 영향력을 가진 것으로 나타났다. 마지막으로 매개효과 검증에서도 유의한 차이점이 검증되었다.

• 디지털융복합연구
• /
• 제14권12호
• /
• pp.105-110
• /
• 2016

스마트 디바이스의 확산과 모바일 속도와 접근의 편리성 향상됨에 따라 다양한 스마트 디바이스에서 동일 작업을 할 수 있는 모바일 클라우드 서비스를 촉진시키고 있다. 본 논문은 모바일 클라우드 서비스의 이용의도의 영향요인 분석을 위한 탐색적 연구이다. 본 연구는 모바일 클라우드 서비스를 대상으로 이용의도 분석을 위해서 TAM, VAM과 UTAUT을 결합은 융합수용모델을 개발하여 적용하기로 한다. 제안하는 탐색 모델은 단말 이동성, 높은 가용성, 손쉬운 접근성, 서비스 확장성 등과 같은 모바일 클라우드 서비스의 특성을 포함한 TAM, VAM과 UTAUT를 적용하여 모바일 클라우드 서비스의 이용의도의 중요 요인을 파악하기 위해 가설을 수립하고 이를 검증한다. 궁극적으로 본 연구를 통하여 이용자들의 모바일 클라우드 서비스의 사용의도를 이해할 수 있을 뿐만 아니라 모바일 클라우드 서비스 제공자들이 보다 효과적인 모바일 클라우드 서비스 개발과 전략 수립을 위한 방향성을 제공해 줄 수 있을 것으로 기대한다.

• Journal of Gastric Cancer
• /
• 제21권4호
• /
• pp.379-391
• /
• 2021

Purpose: Promoter DNA methylation of various genes has been associated with metachronous gastric cancer (MGC). The cancer-specific methylation gene, cysteine dioxygenase type 1 (CDO1), has been implicated in the occurrence of residual gastric cancer. We evaluated whether DNA methylation of CDO1 could be a predictive biomarker of MGC using specimens of MGC developing on scars after endoscopic submucosal dissection (ESD). Materials and Methods: CDO1 methylation values (TaqMeth values) were compared between 33 patients with early gastric cancer (EGC) with no confirmed metachronous lesions at >3 years after ESD (non-MGC: nMGC group) and 11 patients with MGC developing on scars after ESD (MGCSE groups: EGC at the first ESD [MGCSE-1 group], EGC at the second ESD for treating MGC developing on scars after ESD [MGCSE-2 group]). Each EGC specimen was measured at five locations (at tumor [T] and the 4-point tumor-adjacent noncancerous mucosa [TAM]). Results: In the nMGC group, the TaqMeth values for T were significantly higher than that for TAM (P=0.0006). In the MGCSE groups, TAM (MGCSE-1) exhibited significantly higher TaqMeth values than TAM (nMGC) (P<0.0001) and TAM (MGCSE-2) (P=0.0041), suggesting that TAM (MGCSE-1) exhibited CDO1 hypermethylation similar to T (P=0.3638). The area under the curve for discriminating the highest TaqMeth value of TAM (MGCSE-1) from that of TAM (nMGC) was 0.81, and using the cut-off value of 43.4, CDO1 hypermethylation effectively enriched the MGCSE groups (P<0.0001). Conclusions: CDO1 hypermethylation has been implicated in the occurrence of MGC, suggesting its potential as a promising MGC predictor.