• 전자공학회논문지
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• 제51권3호
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• pp.82-88
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• 2014

우리는 고성능 컴퓨팅 (high performance computing) 시스템에서 메쉬 재배열이 라플라시안 스무딩에 대해서 어떠한 효과가 있는지 연구한다. 구체적으로, 우리는 nonuniform memory access (NUMA) 구조의 고성능 컴퓨팅 시스템에서 Reverse-Cuthill Mckee 알고리즘을 사용하여 메쉬를 재배열하고 메쉬질을 높이기 위하여 라플라시안 스무딩을 사용한다. 먼저 하나의 코어를 사용하여 메쉬 재배열의 라플라시안 스무딩에 대한 속도 향상을 조사한 후에 NUMA구조의 멀티코어 시스템에서 OpenMP를 이용하여 병렬화할 경우 메쉬 재배열의 라플라시안 스무딩에 대한 속도 향상에 대하여 조사한다.

• The Journal of Asian Finance, Economics and Business
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• 제7권6호
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• pp.351-363
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• 2020

The objective of this paper is to explore how board gender diversity affects corporate sustainability performance. Therefore, this paper examines the direct association between board gender diversity with corporate sustainability performance and the mediation effect of enterprise risk management (ERM) on this association. The study employed a cross-sectional survey method. Data were collected from annual reports, websites, and through the questionnaires that were distributed to Chief Financial Officers (CFOs) of all the listed companies of Dhaka Stock Exchange, Bangladesh. The partial least square technique of Structural Equation Modelling (SEM) approach was employed for data analysis. The result did not find support for the direct association between board gender diversity and sustainability performance in Bangladesh context. This implies that contextual factors, such as, male-dominant board, appointment of female directors based on family ties, lack of education and expertise etc. may discount gender diversity direct influence on sustainability performance. However, the study finds strong support for the mediating role of ERM use within the corporate structure. Further analysis of indirect effect suggests that ERM use mediates the relationship of board gender diversity and sustainability performance in full. This implies that in the Bangladesh context effective use of ERM is highly recommended.

• 한국정보기술응용학회:학술대회논문집
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• 한국정보기술응용학회 2005년도 6th 2005 International Conference on Computers, Communications and System
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• pp.277-280
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• 2005

With the proliferation of mobile terminals, use of the Internet in mobile environments is becoming more common. To support mobility in these terminals, Mobile IPv4 is proposed and represents the standard in IPv4 environments. Authentication should be mandatory, because mobile terminals can utilize Internet services in any foreign domain. Mobile IPv4 provides symmetric key based authentication using the default HMAC-MD5. However, symmetric key based authentication creates a key distribution problem. To solve this problem, public key based authentication mechanisms have been proposed. In this paper, the performance of each of these mechanisms is evaluated. The results present that, among these mechanisms, partial certificate based authentication has superior performance, and certificate based authentication has the worst performance. Although current public key based authentication mechanisms have lower performance than symmetric key based authentication, this paper presents the possibility that public key based authentication mechanisms may be used for future mobile terminal authentication.

• 한국문헌정보학회지
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• 제39권4호
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• pp.207-231
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• 2005

선행연구를 고찰하여, 정보리터러시 관련 교육에 대한 노출, 각종 정보원에 대한 경험, 정보 이용 관련 교수진의 조언, 개인적 배경 등을 정보리터러시에 영향을 미치는 독립변인으로, 정보리터러시 태도와 실제 능력을 종속 변인으로 추출하고, 대학생을 대상으로 한 측정도구를 고안하여 조사를 수행한 후, 관련 요인의 현황과 요인간 관계 및 영향력 정도를 통계적으로 분석하였다. 정보리터러시의 개인별 집단별 차이, 낮은 도서관이용교육 노출과 교수진의 조언 등이 문제점으로 드러났으며, 컴퓨터와 인터넷 교육, 각종 정보원 이용 경험 성별과 전공계열 등이 정보리터러시에 영향을 미치는 요인으로 입증되었다. 연구결과에 기초하여 정보리터러시 향상을 위한 사회의 인식전환, 이용교육의 실질적 변화, 고등교육기관 및 관련 협회의 유기적 협력과 노력 등이 제안되었다.

• 한국정보시스템학회지:정보시스템연구
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• 제20권1호
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• pp.75-105
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• 2011

This study is an empirical study on the relationships among organizational citizenship behaviors, absorptive capacity, performance of using ERP(perceived ease of use, perceived usefulness, and intention of ERP extension usage). In particular, mediating effect of absorptive capacity and perceived usefulness is empirically analysed to find causes and impacts among these variables. In order to achieve the goals of this study, research models were proposed and hypothesis were drawn to test on the basis of previous studies. A survey was conducted to the members of the seven organizations such as manufacturers, distributors and service industry. The survey questionnaires were sent to 400 people and 304 of them were returned. This data was analyzed with SPSS 12.0 and AMOS 5.0. The study results are as follows. There were no direct effects of the organizational citizenship behaviors on the performance of using ERP. The organizational citizenship behaviors had a positive effects on the absorptive capacity. The absorptive capacity had also a positive effect on the performance of using ERP and the perceived ease of use. The perceived ease of use had a positive effect on the perceived usefulness and the intention of ERP extension usage. Futhermore, the perceived usefulness had a positive effect on the intention of ERP extension usage. In addition, there was a full mediating effect of the absorptive capacity on between the organizational citizenship behaviors and the performance of using ERP. The perceived usefulness had a partial mediating effect on between the perceived ease of use and the intention of ERP extension usage.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2005년도 한국컴퓨터종합학술대회 논문집 Vol.32 No.1 (A)
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• pp.799-801
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• 2005

There have been many streaming servers that provide a large number of contents for a user's preference. General purpose streaming sewer makes use of a RTSP protocol for streaming controls such as message passing with client players. To date, there has been minimal research regarding streaming server's performance test tools. For measuring streaming server's performance, performance evaluation technique is needed and also achieved by RTSP based controls, a server's performance result and its miscellaneous test tools such the PseudoPlayer for pumping data to a specified port and the PseudoMonitor for gathering information. In this paper, We implement a test toolkit for evaluating a streaming server's performance and show the case of its application

• 한국정보시스템학회지:정보시스템연구
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• 제17권1호
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• pp.83-111
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• 2008

The purpose of this study is to identify which factors are important for learning performance and the moderating effects of self-regulated factors such as elaboration and organization between users characteristic(perceived usefulness, preparatory education, internet experience) and learning performance. To Accomplish these research purpose, this study performed a survey and 173 response were used for statistical analysis. The results of this study are as follows: First, 7 factors(ease of use, interactivity, accuracy, media richness, perceived usefulness, preparatory education, internet experience) had significant impacts on learning performance whereas reliability did not. Second, the moderating effects of self-regulated factors showed that Elaboration of self-regulated factors can be considered as a significant moderating variable between 2 factors(perceived usefulness, internet experience) and teaming performance.

• 인터넷정보학회논문지
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• 제21권5호
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• pp.57-65
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• 2020

At present, the existing virus recognition systems usually use signature approach to detect malicious executable files, but these methods often fail to detect new and invisible malware. At the same time, some methods try to use more general features to detect malware, and achieve some success. Moreover, machine learning-based approaches are applied to detect malware, which depend on features extracted from malicious codes. However, the different distribution of features oftraining and testing datasets also impacts the effectiveness of the detection models. And the generation oflabeled datasets need to spend a significant amount time, which degrades the performance of the learning method. In this paper, we use transfer learning to detect new and previously unseen malware. We first extract the features of Portable Executable (PE) files, then combine transfer learning training model with KNN approachto detect the new and unseen malware. We also evaluate the detection performance of a classifier in terms of precision, recall, F1, and so on. The experimental results demonstrate that proposed method with high detection rates andcan be anticipated to carry out as well in the real-world environment.

• 산업융합연구
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• 제21권9호
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• pp.133-142
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• 2023

농촌인구 감소, 고령화 심화, 기후변화 등으로 지속적으로 악화되고 있는 한국농업의 생산여건 변화에 효과적으로 대응하기 위해 디지털 정보기술 활용이 중요해졌다. 이에 본 연구는 성향점수매칭법을 이용하여 농가의 정보화 기기 활용 선택에 미치는 요인과 정보화 기기 활용이 농산물 판매에 미치는 효과를 분석하였다. 분석 결과, 연령이 낮은 농가, 교육수준이 높은 농가, 선도농가들이 정보화 기기 활용 채택 가능성이 높은 것으로 나타났다. 연령, 경영규모, 영농형태 등 유사한 특성을 가진 농가라면 농업경영에 정보화 기기를 활용하는 농가가 더 높은 농산물 판매 수입을 올리는 것이 확인되었다. 따라서 농가의 정보화 기기의 활용능력을 높이는 것은 농가소득을 향상시킬 수 있다는 시사점을 제공한다. 정보화 기기 보급 및 농업정보를 활용할 수 있는 능력을 농가들이 가질 수 있도록 정부의 농업·농촌 분야 정보화 지원 사업이 중요하다 할 수 있으며, 정보 기술에 근거한 과학적 영농 및 마케팅 활동이 이루어질 수 있는 정보 인프라 구축에도 적극적인 투자가 이루어져야 할 것이다.

• 대한안전경영과학회지
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• 제20권2호
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• pp.55-63
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• 2018

This study empirically verified the effect of enterprise SNS usage on communication and work performance and the effect of communication on work performance for corporate employees. To accomplish the purpose of this study, we proposed a research model, set up research hypotheses, and verified the hypotheses based on previous studies. For this study, we surveyed the employees of manufacturing companies located at Ulsan city. The results of this study are summarized as follows. First, the use of enterprise SNS has a significant effect on communication. Second, communication has a significant effect on work performance. Third, the use of enterprise SNS has a significant effect on work performance. Through the results of this study, it can be confirmed that the introduction and utilization of enterprise SNS suitable for enterprises leads to the satisfaction of employees' communication and improvement of the work performance.