• 한국지능시스템학회논문지
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• 제17권4호
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• pp.526-533
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• 2007

본 논문에서는 조직구성원을 대상으로 하여 이고그램, 인생태도, 스트로크, 시간의 구조화 4개의 이론을 이용한 직무만족의 패턴에 대한 연구를 하였다. 패턴분석의 도구로서는 특별히 패턴분석에 효과적인 모델인 퍼지 TAM 네트워크를 사용하였다. 퍼지 TAM 네트워크의 입력데이터는 교류분석의 4개 이론의 값이며, 출력데이터는 직무만족의 점수를 2개로 나눈 클래스이다. 연구의 결과로서는 4개의 교류분석의 이론과 직무만족의 패턴분석에 대한 트레이닝 데이터의 정답률은 85-100%, 체킹데이터의 정답률은 60%이었다.

• 한국정보시스템학회:학술대회논문집
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• 한국정보시스템학회 2004년도 추계학술대회
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• pp.312-326
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• 2004

본 연구는 Virtual Space의 수용에 어떻게 영향을 미치는지를 파악하고자 하는 연구이다. 이 연구는 정보기술수용 모형의 확장모형인 TAM2(Venkatesh & Davis, 2000)를 적용하여 연구하였으며, 실제 Virtual Space를 사용한 경험이 있는 사용자를 대상으로 설문하여 SPSS와 AMOS를 이용하여 TAM2 모형을 검증하고자 하였다. 연구결과 정보기술 수용에 대한 대상이 조직 내부의 이용자로 연구했던 TAM2와 다르게 외부변수 중 직무관련성과 결과 품질에 대한 변수가 유의하지 않은 것으로 나타났다. 하지만 주관적 규범, 이미지, 결과 논증가능성 등은 유용성에 정의 영향을 주었으며, 특히 외부 변수 중 주관적 규범은 매우 큰 영향을 주고 있는 것으로 나타나 새로운 정보기술의 수용에 있어 중요한 요인으로 분석되었다. 본 연구 결과의 시사점과 한계점 및 향후 연구방향을 결론에서 제시하였다.

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

• 한국생활과학회지
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• 제19권2호
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• pp.375-387
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• 2010

The Technology Acceptance Model (TAM) presented by Davis (1989) has been regarded as highly explanatory as well as the clearest model in explaining consumers' adoption of innovative technology or products. Existing studies have expanded the model by adding related external variables to improve the explanation depending on the type of innovative technology. This study expanded TAM by adding two more variables, namely consumers' technology innovation and clothing involvement considering the feature of smart clothing. The objectives of this study are as follows: 1. to suggest the extended TAM in explaining the adoption process of smart clothing, 2. to verify the differences in the path hypotheses according to the type of smart clothing. A total of 815 effective samples were collected from adults over 20 years old, and AMOS 5.0 package was employed for data analysis. As a result, it was proved that the extended TAM was appropriate for explaining the process of adopting smart clothing according to the path hypotheses of smart clothing types. Technology innovation and clothing involvement were confirmed as antecedent variables in affecting TAM. The perceived usefulness appeared to be a more crucial variable than the perceived ease of use and attitude was found to be an important parameter in adopting smart clothing. Considering the path hypotheses of MP3 playing clothes, perceived usefulness had a direct influence on acceptance intention unlike other types of smart clothing. As for photonic clothes, the influence of perceived ease of use on attitude was supported while it was rejected in the case of MP3 playing clothes and sensing sportswear.

• 인터넷정보학회논문지
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• 제25권2호
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• pp.69-77
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• 2024

전 세계적으로 관광 산업이 코로나19 이전 수준으로 회복되고 있습니다. 이번 글에서는 관광객의 한국 여행 의향에 영향을 미치는 요인을 살펴보고자 합니다. 데이터 분석에는 TAM 모델을 사용했으며, 실제 시나리오에 더 적합하도록 신뢰, 정보 품질, 개인 혁신성 등 몇 가지 주요 외부 변수를 추가했습니다. 구조방정식 모델링 방법인 SPSS와 AMOS를 사용하여 분석한 결과, 지각된 위험은 의도와 큰 관련이 없다는 사실을 발견했습니다. 지각된 위험은 구매 의도와 유의미한 관계가 없으며, 이는 소비자가 지각된 위험보다 편의성을 우선시할 수 있음을 시사합니다. 그리고 다른 많은 요인들이 이 둘 사이의 잠재적인 매개 요인이 될 수 있습니다.

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

• Asia pacific journal of information systems
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• 제19권2호
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• pp.73-94
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• 2009

The general aspects for the future warfare shows that the concept of firepower and maneuver centric warfare has been replacing with that of information and knowledge centric warfare. Thus, some developed countries are now trying to establish the information systems to perform intelligent warfare and innovate defense operations. The C4I(Command, Control, Communication, Computers and Intelligence for the Warrior) systems make it possible to do modern and systematic war operations. The basic idea of this study is to investigate how TAM(Technology Acceptance Model) can explain the acceptance behavior in military organizations. Because TAM is inadequate in explaining the acceptance processes forcomplex technologies and strict organizations, a revised research model based upon TAM was developed in order to assess the usage of the C4I system. The purpose of this study is to investigate factors affecting the usage of C4I in the Korean Army. The research model, based upon TAM, was extended through a belief construct such as self-efficacy as one of mediating variables. The self-efficacy has been used as a mediating variable for technology acceptance, and the variable was included in the research model. The external variables were selected on the basis of previous research. The external variables can be classified into following: 1) technological, 2) organizational, and 3) environmental factors on the basis of TOE(Technology-Organization-Environment) framework. The technological factor includes the information quality and the task-technology fitness. The organizational factor includes the influence of senior colleagues. The environmental factor includes the education/train data. The external variables are considered very important for explaining the behavior patterns of information technology or systems. A structured questionnaire was developed and administrated to those who were using the C4I system. Total 329 data were used for statistical data analyses. A confirmatory factor analysis and structured equation model were used as main statistical methods. Model fitness Indexes for measurement and structured models were verified before all 18 hypotheses were tested. This study shows that the perceived usefulness and the self-efficacy played their roles more than the perceived ease of use did in TAM. In military organizations, the perceived usefulness showed its mediating effects between external variables and dependent variable, but the perceived ease of use did not. These results imply that the perceived usefulness can explain the acceptance processes better than the perceived ease of use in the army. The self-efficacy was also used as one of the three mediating variables, and showed its mediating effects in explaining the acceptance processes. Such results also show that the self-efficacy can be selected as one possible belief construct in TAM. The perceived usefulness was influenced by such factors as senior colleagues, the information quality, and the task-technology fitness. The self-efficacy was affected by education/train and task-technology fitness. The actual usage of C4I was influenced not by the perceived ease of use but by the perceived usefulness and selfefficacy. This study suggests the followings: (1) An extended TAM can be applied to such strict organizations as the army; (2) Three mediation variables are included in the research model and tested at real situations; and (3) Several other implications are discussed.

• 한국산림과학회지
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• 제99권3호
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• pp.368-379
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• 2010

u-Park는 친환경적 USN과 u-IT 기술을 토대로 자원 및 시설물들이 지능화되고 그에 관련된 정보가 통합적으로 관리되는 공원이다. u-Park 관리시스템의 도입을 통해 관리효율성 증대를 도모하고 과학적 수용력 관리를 실현하기 위해서는 국립공원관리자가 새로 도입되는 u-Park 관리시스템을 수용할 수 있어야 한다. 관리자의 u-Park 관리 시스템 기술수용과정을 규명하기 위해 기술수용모델(TAM) 구조방정식을 설정하였다. 5개 산악형 국립공원에 근무하는 국립공원관리공단 직원 176명을 대상으로 설문조사를 실시하여 자료를 수집하였다. 분석결과 TAM 구조방정식의 설명력은 55.2%이며, u-Park 관리시스템이 현재 업무 내용과 관리자의 업무 처리 방식에 호환되는 정도가 관리자의 기술수용에 가장 큰 영향력을 미치는 것으로 나타났다.

• Asia pacific journal of information systems
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• 제33권2호
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• pp.298-317
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• 2023

This study is about the attitudes and intentions of consumers considering the usage of O2O application (app) under the COVID-19 situation. By integrating TAM and TPB as a theoretical background, we selected VPC (various product choice) and PII (product information intensity) as new functional external variables that have a positive effect on new system called O2O commerce. We also applied the transaction cost theory to investigate the obstacle of O2O business. We conducted a survey of consumers in large cities in the Korean market. As a result of this study, it was found that the more O2O app users recognized the influence of SN (subject norms), the more useful O2O app was, the more it led to a change in attitude and usage intention was positively significant. In addition, as the O2O app was easy to use and useful, and the SN was recognized, the user's attitude was positive. On the other hand, it was also found that the transaction cost that consumers have to pay had a negative effect on usage intention. Additionally, VPC and PII have been shown to positively influence on usefulness of O2O apps.

• Journal of Life Science
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• 제11권1호
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• pp.22-26
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• 2001

In estrogen-dependent MCF-7 human breast cancer cells, $E_2$ at 10 nM stimulated cell proliferation to over 200% compared to the untreated control. EGF and TGF${\alpha}$, which are known as the autocrine/paracrine growth factors induced by $E_2$, also directly stimulated the cell growth in almost as the same extent as $E_2$. DFMO which is the specific inhibitor of ODC could inhibit cell growth even at as low as 0.5 mM. In the treatment with 1 mM DFMO for 4 days, the cell growth was inhibited to 38% of the control. HO-TAM at 1 ${\mu}$M could inhibit the proliferation of MCF-7 cells to 19% of the control. Those inhibitory effects were also found in the cells stimulated with $E_2$, EGF, and TGF${\alpha}$. The inhibitory effects were found even in 2 days of treatment. However, $E_2$, EGF, and TGF${\alpha}$ did not give any effect in the protein synthesis. Neither DFMO or HO-TAM gave any effect on the total protein synthesis. But the pattern of protein secretion was noticeably influenced by the growth stimulants or inhibitors. Proteins of 160, 52, 42, 36, and 32 kDa belonged to the major secretory proteins. Especially, 42 and 36 kDa proteins were most significantly influenced by the treatment of $E_2$, EGF, or TGF$\alpha$. DFMO and HO-TAM inhibited the secretion of these major proteins.