• The Journal of Korean Association of Computer Education
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• v.23 no.2
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• pp.13-20
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• 2020

The interest in artificial intelligence is due to an increase in influence on companies, organizations, daily lives and society. The purpose of this study is to analyze the key elements in the teaching subjects of artificial intelligence-related subjects of Korean universities based on the intelligent system area of Computer Science 2013 in terms of human resources development. According to the analysis, there are five out of nine universities that run the required courses. Based on the 12 detailed knowledge domains of intelligent systems, the compulsory subjects of universities are distributed in the field of basic search theory, basic knowledge expression and reasoning, and inference based on uncertainty. The elective courses of each university covered topics in five to eight areas of the total knowledge area of the intelligent system, with 69.9 percent of universities with the highest average ratio of areas involving the subject of teaching subjects and 46.3 percent of universities with the lowest. This study has implications for the fact that prior to entering an artificial intelligence graduate school, we were able to grasp the level of knowledge about artificial intelligence at the undergraduate level.

• Journal of KIISE:Computer Systems and Theory
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• v.32 no.5
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• pp.232-242
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• 2005

This paper concerns automatic hardware synthesis from data flow graph (DFG) specification for fast HW/SW cosynthesis. A node in BFG represents a coarse grain block such as FIR and DCT and a port in a block may consume multiple data samples per invocation, which distinguishes our approach from behavioral synthesis and complicates the problem. In the presented design methodology, a dataflow graph with specified algorithm can be mapped to various hardware structures according to the resource allocation and schedule information. This simplifies the management of the area/performance tradeoff in hardware design and widens the design space of hardware implementation of a dataflow graph compared with the previous approaches. Through experiments with some examples, the usefulness of the proposed technique is demonstrated.

• Information Systems Review
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• v.21 no.4
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• pp.99-123
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• 2019

The software industry is a high value-added industry in the knowledge information age, and its importance is growing as it not only plays a key role in knowledge creation and utilization, but also secures global competitiveness. Among various SW available in today's business environment, Open Source Software(OSS) is rapidly expanding its activity area by not only leading software development, but also integrating with new information technology. Therefore, the purpose of this research is to empirically examine and analyze the effect of factors on the switching behavior to OSS. To accomplish the study's purpose, we suggest the research model based on "Push-Pull-Mooring" framework. This study empirically examines the two categories of antecedents for switching behavior toward OSS. The survey was conducted to employees at various firms that already switched OSS. A total of 268 responses were collected and analyzed by using the structural equational modeling. The results of this study are as follows; first, continuous maintenance cost, vender dependency, functional indifference, and SW resource inefficiency are significantly related to switch to OSS. Second, network-oriented support, testability and strategic flexibility are significantly related to switch to OSS. Finally, the results show that willingness to secures SW competitiveness has a moderating effect on the relationships between push factors and pull factor with exception of improved knowledge, and switch to OSS. The results of this study will contribute to fields related to OSS both theoretically and practically.

• Journal of Korea Society of Industrial Information Systems
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• v.22 no.4
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• pp.117-129
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• 2017

The Purpose of this Study is to Identify the Learning Modules of the National Competency Standard (NCS) Related to the Information Systems Development Curriculum of 4-year Colleges, to Explore the Possibility of Applying NCS to the Curriculum, and to Examine Implications. The Importance of 26 Competency Units in the Applied SW Engineering of NCS was Compared by Area Experts Composed of 14 Information Systems Developers and Professors of 7 Universities who Teach Software Engineering Subjects Through the Hierarchical Analysis Process (AHP). The Results of the Study as Follows. First, the Relative Importance of the Competency Elements was in order of 'Confirming the Requirements', 'Checking the UI Requirements', 'Designing the Physical Data Repository', 'Testing Developer Integration', and 'Fixing Developer Defects'. Second, while the Entry and Intermediate Level Developer Group Determined that the Competency Elements Related to the IS Development Implementation Stage is more Important, the Advanced IS Developer Groups Consider the Competency Elements Related to the Theory-oriented Design Stage as Important Competency. In Addition, the Group of College Professors was Found to Choose all the Practical and Theoretical Competency Elements that Two Developers Groups Considered Important. Implications of the Study Suggested that the Job Performance Competence and Quality of Education Related to IS Development can be Enhanced.

• Journal of Digital Convergence
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• v.10 no.5
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• pp.27-35
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• 2012

The importance of smart learning (SL) has been emphasized in schools. Additionally, the significance of smart work (SW) in improving business performance has gained much attention among industries. From theoretical, technological, and environmental perspectives, SL and SW are somewhat similar. Therefore, a case study was performed to find a way to link SL and SW, and a linking model was proposed for this purpose. Because laptops are considered a pivotal element in the technological aspect of SL, graduate students' use of personal laptops in classes (Bring Your Own Laptop, BYOL) was investigated. The results showed that the students reacted positively to the idea of using personal laptops in class and that they expected to learn IT skills more effectively this way. They listed being able to study even after class and the easy accessibility of relevant data as the strengths of BYOL. However, they cited the heaviness of the laptops and occasional loss of focus during classes as the weaknesses of BYOL. Thus, this study showed the possibility of that students who experience SL can perform better in an SW situation. Therefore, if a policy is enacted that allows students to efficiently use laptops, a greater number of educational achievements will be attained on smart campuses and, subsequently, a greater number of smart workers will be produced.

• Journal of The Korean Association of Information Education
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• v.21 no.4
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• pp.415-424
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• 2017

Due to the influence of the fourth industrial revolution in recent years, maker education is getting attention. Therefore, this study tried to propose the possibility of application (app) development education as maker education by empirically verifying the affective and cognitive effects of app development education using authoring tool. To do this, we implemented app development education in D high school in Seoul, Korea, and collected data from 41 participants. We analyzed the changes in attitudes toward SW education and creative problem-solving ability before and after the education by conducting the paired t-test, and the level of satisfaction and perceived achievement through descriptive statistics analysis. Also, the learner's responses collected through the open-ended questionnaire were analyzed qualitatively. The result showed that the attitude toward SW education and creative problem-solving ability showed statistically significant improvement after app development education using the authoring tool, and the learner's statement also supported this result. Also, satisfaction and perceived achievement after the education were relatively high. Through these results, we have empirically confirmed the effect of app development education using the authoring tool for high school students, and derived the theoretical and practical implications.

• Proceeding of EDISON Challenge
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• 2017.03a
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• pp.132-144
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• 2017

현재, 빛을 이용한 화학 연구가 활발히 진행되고 있고 이러한 연구는 양자역학을 기반으로 화학에서 상당히 중요한 부분을 차지하고 있다. 또한 컴퓨터의 발전에 따라 여러 계산 모델들이 개발되고 있다. 본 논문에서는 회전파 근사(Rotating Wave Approximation, RWA)를 통해 라비 진동을 이론적으로 확인하고, 가장 간단한 연속파 레이저와 두 에너지 준위에서 시작하여 레이저 펄스와 두 에너지 준위, 레이저 펄스와 이원자분자인 $Na_2$ 분자의 두 전자에너지 퍼텐셜 준위, 그리고 실제 시간 밀도 범함수 이론(Real-Time Time Dependent Density Functional Theory, RT-TDDFT)이란 제일원리계산을 통해 연속파 레이저와 $H_2$ 분자와 $C_2H_4$ 분자에서까지 관찰하였다. 이 연구를 통해 공명 전이의 경우 펄스의 면적이 ${\pi}$의 홀수 배일 때 완전한 입자수 전이가 일어나는 펄스 면적 정리를 확인할 수 있었고, 이원자분자인 $Na_2$의 경우엔 펄스의 지속시간도 입자수 전이에 영향을 미친다는 것을 확인하였다. 더 나아가 $H_2$ 분자와 $C_2H_4$ 분자에서는 RT-TDDFT 계산을 통해 라비 진동을 확인할 수 있었고, 두 종류의 기저함수간의 대조를 통해 기저함수 선택의 중요성을 알아보았고, 가장 중요하게는 레이저를 잘 조작하면 입자를 원하는 상태로 들뜨게 할 수 있다는 것이란 결론을 얻게 되었다.

• Proceeding of EDISON Challenge
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• 2016.03a
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• pp.32-36
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• 2016

단일금속 나노입자에 비해 나노합금입자는 발광이나 촉매력과 같은 여러 특징들이 더 뛰어나게 나타난다고 잘 알려져 있다. 이에 따라 실험적인 연구뿐 아니라 이론적으로도 나노합금입자의 특성과 구조를 밝히려는 노력이 이루어지고 있다. 그러나 대부분의 연구는 자유공간을 상정하여 진행되고 있어, 갇힌 공간 속의 입자에 대한 연구는 부족한 실정이다. 이러한 배경으로 본 연구에서는 Sutton-Chen (SC) 포텐셜을 주요 이론으로 하여, 복제교환분자동력학(replica exchange molecular dynamics, REMD) 모의실험을 통해 가두는 공간의 크기에 따라 금-팔라듐 나노합금입자(Au17Pd17)의 구조와 특성이 어떻게 달라지는지 EDISON에 등록된 metal_alloy 프로그램(molecular dynamics simulation of metal alloy nano-cluster)을 사용해 살펴보았다. 결과적으로 입자가 상전이 이전의 낮은 온도에서 존재하면, 둘러싼 공간의 크기와 무관하게 안정한 구조의 중심에 항상 팔라듐 원자가 위치한다는 것이 확인되었다. 또, 가두는 공간의 크기마다 상전이가 일어나는 온도 구간의 차이가 나타났으며, 작은 공간에 갇힌 입자일수록 입자의 최대 직경이 작아지면서 상대적으로 높은 에너지를 가지는 구조를 형성하였다. 이는 입자가 존재하는 공간이 좁을수록 에너지의 증가를 통하면서 최대한 공간을 활용할 수 있는 구조를 선택하는 것으로 보인다.

• Proceeding of EDISON Challenge
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• 2012.04a
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• pp.5-8
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• 2012

임계마하수란 에어포일의 표면에서 음속에 도달하는 부분이 생기기 시작하는 가장 낮은 Mach number라 한다. 임계마하수는 천음속에서 자유류가 임계마하수보다 조금 커지면 항력이 급격하게 증가하게 된다. 그렇기 때문에 임계마하수가 큰 에어포일이 천음속 항공기 설계에 있어서 매우 중요한 역할을 하게 된다. 이번 연구는 학부과정에서 배운 임계마하수에 대해 정의하고, EDISON_CFD를 이용하여 에어포일에 따라서 임계마하수가 달라지는 것을 확인해 보았다. 그 결과 에어포일이 두꺼워질수록 낮은 마하수에서 Shock이 발생하는 것을 확인할 수 있었다. 마지막으로 EDISON_CFD를 이용하여 계산된 임계마하수 값과 이론값을 비교한 결과, 높은 정확도를 확인할 수 있었다.

• Proceeding of EDISON Challenge
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• 2012.04a
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• pp.45-48
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• 2012

본 연구는 인력기를 개발함에 있어서 이에 적합한 프로펠러의 형상을 설계하기 위하여 진행되었다. 인력기는 인간을 유일한 동력원으로 사용하기 때문에 적은 동력, 낮은 RPM을 가지고 비행을 하게 된다. 이에 따라 기존의 항공기와는 다른 특성 및 형상을 가지는 프로펠러 개발의 필요성이 인지되었다. 본 연구에서는 설계하고자 하는 인력기의 제원에 맞는 프로펠러의 특성을 설정한 뒤, 프로펠러의 블레이드를 수 개의 airfoil section으로 나누고, 각 섹션에 대한 공력 특성을 프로펠러 이론 및 Edison CFD를 통하여 계산 및 유추하였다. 이 계산 결과를 토대로 구한 각 airfoil section의 정보를 통하여 프로펠러의 형상을 얻어 낼 수 있었으며, 최종적으로 이를 ANSYS Fluent, CFX와 같은 상용 프로그램을 이용하여 분석함으로써 설계 전에 목표로 하였던 프로펠러의 성능에 도달하였는가를 확인할 수 있었다.