• 대한수학회지
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• 제55권3호
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• pp.735-747
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• 2018

Let M be a real hypersurface of a complex space form with constant curvature c. In this paper, we study the hypersurface M admitting Miao-Tam critical metric, i.e., the induced metric g on M satisfies the equation: $-({\Delta}_g{\lambda})g+{\nabla}^2_g{\lambda}-{\lambda}Ric=g$, where ${\lambda}$ is a smooth function on M. At first, for the case where M is Hopf, c = 0 and $c{\neq}0$ are considered respectively. For the non-Hopf case, we prove that the ruled real hypersurfaces of non-flat complex space forms do not admit Miao-Tam critical metrics. Finally, it is proved that a compact hypersurface of a complex Euclidean space admitting Miao-Tam critical metric with ${\lambda}$ > 0 or ${\lambda}$ < 0 is a sphere and a compact hypersurface of a non-flat complex space form does not exist such a critical metric.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 춘계학술대회
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• pp.120-122
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• 2016

다양한 멀티미디어를 활용한 스마트 학습이 학습 현장에서 활용되는 가운데, 학습자들의 스마트 학습에 대한 수용을 기술수용모형인 TAM을 적용하여 살펴보고자 하였다. 연구 결과를 활용하여 학습자 관점에서의 멀티미디어 활용을 통한 학습환경의 문제점 및 수용에 대한 제언을 하고자 한다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 춘계학술대회
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• pp.131-133
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• 2016

다양한 멀티미디어를 활용한 스마트 학습이 학습 현장에서 활용되는 가운데, 교수자들의 스마트 학습에 대한 수용을 기술수용모형인 TAM을 적용하여 살펴보고자 하였다. 연구 결과를 활용하여 학습자 관점에서의 멀티미디어 활용을 통한 학습환경의 문제점 및 수용에 대한 제언을 하고자 한다.

• 한국정보시스템학회지:정보시스템연구
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• 제15권4호
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• pp.55-72
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• 2006

The total market capacities of our domestic on-line shopping malls had reached over one billion wons in 2005. They are also estimated to reach 1.8 billion wons in 2008. In order to reveal some relationships between six antecedent variables and intention-to-use of online shooing malls, this study has extended the original TAM2 model using these variables obtained from (1) perceived usefulness and perceived ease of use from TAM2 model, (2) compatibility from IDT theory, (3) perceived enjoyment from Flow theory, and (4) others (perceived risk and self efficacy). Two statistical packages such as SPSS 12.0 and Lirel 8.70 were used for data analyses. Among these seven proposed hypotheses, six hypotheses were accepted while one hypothesis regarding perceived risk was rejected. As perceived risk hypothesis concerning the intention-to-use was rejected, the perceived risk did not show the support of the intention-to-use.

• 한국IT서비스학회지
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• 제11권1호
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• pp.247-272
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• 2012

Social Network Service(SNS) is a kind of advanced Internet service that acts as personal media. This study was intended to find out the structural relationships among factors affecting the usage of social network services by extending the Technology Acceptance Model(TAM). For this purpose, the variable 'Flow' was first integrated into the TAM in order to understand the internal motivations of users. And then the external factors of SNS usage were derived from the perspective of users, contents, and media side of SNS, and finally the dependent variable was set with the intention of sustainable use. Then these factors were carefully integrated into a structural model. We expect the findings of this study will be very helpful for the internet marketing professionals, SNS developers, and the others.

• 한국IT서비스학회지
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• 제7권1호
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• pp.63-87
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• 2008

This study investigates the effects of individual and group level factors on the use of GSS (Group Support System) and task performance from GSS use. GSS facilitates the group work, so that GSS adoption is not necessarily influenced only by individual perceptions on information systems as TAM insists. Adaptive Structuration. Theory (AST) joins with TAM in our study to explain the adoption and success from GSS use. AST contends that the success of IS is not necessarily the technical fit between tasks and technology, instead the political outcome among user socializations. We found that collected data from 303 individual IT staffs in a national bank. Our results demonstrate that traditional theories on TAM (Technology Acceptance Model) need to be refined, when considering the TTF(task-technology fit). TTF render high influences on PU(perceived usefulness). PEU(perceived ease of use) and FOA(faithfulness on appropriation). And FOA influences highly on our dependent variable. Implications and directions for future research are discussed.

• 한국지능시스템학회논문지
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• 제16권5호
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• pp.622-626
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• 2006

본 논문에서는 성격유형 분류도구 중에서 에니어그램의 성격유형 관련변수와 학습성격유형과의 관계를 신경망을 이용하여 분석하고 타당성을 보이고자 한다. 즉, 학습성격유형의 기본유형인 행동형, 규범형, 탐구형, 이상형에 대한 패턴을 패턴분석에 효과적인 모델인 퍼지 TAM 네트워크를 이용하여 분석하고자 한다.

• Asian Pacific Journal of Cancer Prevention
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• 제13권1호
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• pp.301-304
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• 2012

Objective: To explore the associations of serum tumor associated material (TAM) with other common tumor markers like carcinoembryonic antigen (CEA), carbohydrate antigen 125 (CA125), carbohydrate antigen19-9 (CA19-9) and its clinical application in non-small cell lung cancer (NSCLC) patients. Methods: A total of 87 patients were enrolled into this study, all with histologically or cytologically confirmed NSCLC. With the method of chemical colorimetry, the level of TAM was determined and compared, while chemiluminescence was used to measure the levels of common tumor markers. Results: The level of TAM decreased after chemotherapy compared with before chemotherapy when CT or MRI scans showed disease control. Furthermore, it increased when disease progessed and there was no statistically significant difference in monitoring of TAM and common tumor markers (P>0.05). Conclusions: Detecting TAM in NSCLC patients has a higher sensitivity and specificity, so it can be used as an indicator for clinical monitoring of lung cancer chemotherapy.

• BMB Reports
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• 제50권12호
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• pp.615-620
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• 2017

Fibronectin (FN) plays important roles in the EMT in a variety of cancer cell types. However, the mechanism by which FN expression is regulated in tamoxifen-resistant (TamR) breast cancer cells has not yet been fully elucidated. Aberrant FN expression was associated with poor prognosis in patients with luminal type A breast cancer. In addition, FN was upregulated in TamR cells. To investigate the mechanism by which FN expression is regulated, we assessed the levels of phosphorylated Akt, JNK, and STAT3 and found that they were all increased in TamR cells. Induction of FN expression was dampened by LY294002 or AKT IV in TamR cells. Furthermore, FN expression was increased by constitutively active (CA)-Akt overexpression in tamoxifen-sensitive MCF7 (TamS) cells and colony formation of TamR cells was blocked by AKT IV treatment. Taken together, these results demonstrate that FN expression is upregulated through the PI-3K/Akt pathway in tamoxifen-resistant breast cancer cells.

• 한국콘텐츠학회논문지
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• 제11권6호
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• pp.372-384
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• 2011

본 연구는 인터넷 뱅킹 서비스가 성숙기에 접어 들면서 고객들의 인터넷 뱅킹이라는 기술을 수용하게 되는 과정과 이유 파악이 필요하며, 고객의 입장에서는 인터넷 뱅킹 서비스가 어떤 단계를 거쳐 어떻게 이용되는지 알아보고 인터넷 뱅킹의 지속적 고객수용에 영향을 미치는 외부적 요인을 실증적으로 분석하였다. 외부적 요인으로는 사용자지식, 서비스 특성, 보안, 인지된 위험, 사용편리성 그리고 유용성을 사용하였다. 실증분석을 위한 틀로서 TAM을 기초로 변형한 Ex-TAM을 재구성하여 분석하였다. 결과로서 4개의 요인 (서비스 특성, 사용편리성, 유용성, 신뢰)이 유의하게 나타났다. 반면, 2개의 요인(보안, 인지된 위험)은 유의하지 않았으며 1개의 요인(사용자 지식)은 부분적으로 유의하게 나타났다.