• 한국재료학회지
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• 제26권12호
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• pp.709-713
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• 2016

Grain morphology, phase stability and mechanical properties in binary Ti-Al alloys containing 43-52 mo1% Al have been investigated. Isothermal forging was used to control the grain sizes of these alloys in the range of 5 to $350{\mu}m$. Grain morphology and volume fraction of ${\alpha}_2$ phase were observed by optical metallography and scanning electron microscopy. Compressive properties were evaluated at room temperature, 1070 K, and 1270 K in an argon atmosphere. Work hardening is significant at room temperature, but it hardly took place at 1070 K and 1270 K because of dynamical recrystallization. The grain morphologies were determined as functions of aluminum content and processing conditions. The transus curve of ${\alpha}$ and ${\alpha}+{\gamma}$ shifted more to the aluminum-rich side than was the case in McCullough's phase diagram. Flow stress at room temperature depends strongly on the volume fraction of the ${\alpha}_2$ phase and the grain size, whereas flow stress at 1070 K is insensitive to the alloy composition or the grain size, and flow stress at 1270 K depends mainly on the grain size. The ${\alpha}_2$ phase in the alloys does not increase the proof stress at high temperatures. These observations indicate that improvement of both the proof stress at high temperature and the room temperature ductility should be achieved to obtain slightly Ti-rich TiAl base alloys.

• 한국지역지리학회지
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• 제7권2호
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• pp.97-119
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• 2001

본 연구는 지리 교육에서 급변하는 지식 정보화 사회의 변화에 적응하고 앞으로 적용될 제7차 교육과정 특히 수준별 수업의 원활한 실현을 위한 방안을 모색한 것이다. 이를 위해 우선 지리 영역의 지형단원을 중심으로 지리과 심화 보충형 수준별 수업을 위한 교과서의 재구성하여 홈페이지를 구축하였다. 과제해결학습을 통한 수준별 교수 학습과정의 모형을 통해 수업설계를 탐색하였다. 이 모형을 구성주의 학습 원리에 적합한 웹 기반 수업(WBI)에 접목하여 웹 활용 수준별 수업을 설계 제시하였다. 이를 통해 지리교과의 현장 적용과 교수 학습 방법을 개선하고자 하며 동시에 이를 통한 지리교육의 활성화 방안을 모색하고자 한다.

• Journal of the Korean Data Analysis Society
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• 제20권6호
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• pp.3101-3116
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• 2018

본 연구에서는 기업 경쟁력의 제고를 통하여 최적화된 경영환경을 조성하고, 기업의 효율성을 높이는데 필요한 혁신 수단인 공급사슬관리를 위한 동적역량의 활용 방향성과 전략을 찾을 수 있는 방안들에 대해 알아보고자 한다. 시장과 기술은 전략적 방향과 문화로 기업이 보유한 정형화된 동적역량에 맞추고, 프로세스에는 공급사슬관리를 위한 동적역량과 관련된 기술을 반영하여 활용할 때에 보다 높은 기업성과를 창출할 수 있을 것이다. 본 연구에서는 시장지향성과 기술지향성이 기업성과에 미치는 영향과 동적역량이 기업성과에 어떠한 영향을 미치는지를 실증적으로 분석하는데 그 목적이 있다. 연구 결과는 시장지향성과 기술지향성은 동적역량에 긍정적 영향을 미치고, 동적역량은 기업성과에 긍정적 영향을 미치는 것으로 나타났다. 즉 동적역량은 시장지향성, 기술지향성과 기업성과 간의 관계를 매개하는 것으로 검증되었으며, 동적역량의 매개효과로 기업의 시장지향성과 기술지향성이 기업성과에 중요한 영향을 미치는 것으로 실증 분석되었다.

• 한국정보통신학회논문지
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• 제25권5호
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• pp.691-700
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• 2021

IP 카메라는 원격지에서도 감시할 수 있을 뿐만 아니라, UTP를 통해 전원 공급도 가능한 장점을 가지고 있으므로 아날로그 CCTV를 급속하게 대체하고 있다. 본 논문에서는 IP 카메라에 널리 적용되고 있는 ONVIF 표준의 프로토콜 구조와 그 외에도 이를 지원하기 위한 인터넷 프로토콜들을 소개하고, 상용보드 상에서 ONVIF 디바이스를 구현한다. 이러한 기능들은 클라이언트 (PC)의 관리 프로그램에서 제어 가능하지만, 사생활 보호 마스크나 열화상 카메라의 온도표시, 관심 영역과 같은 기능은 디바이스 상에서 웹 뷰어를 통해 구현한다. 실험을 통해 IP 카메라와 클라이언트 프로그램이 주고받는 SOAP 메시지와 스트리밍되는 영상을 통해 ONVIF Profile S와 웹 뷰어 기능을 확인한다.

• Journal of Information Technology Applications and Management
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• 제28권3호
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• pp.49-58
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• 2021

Due to the increasing interest in wellness aroused by the aging population and the pursuing feature of active old age, Korean elderly set importance on long life with their healthy condition. Following the change in the paradigm of the medical delivery system from hospital-oriented, treatment-oriented to personal-centered and self-care, Service design application of Smart Healthcare for the elderly became valuable. Smart Healthcare is a healthcare service provided through the fusion of ICT technologies including mobile/wearable devices, IoT, big data, and information technology, and it is utilized to prevent diseases managing abundant health information and living habits. As a methodology for delivering such Smart Healthcare to the elderly, Service design can be adopted. Therefore, this study would like to present the perquisites of Smart Healthcare design for the elderly through analyzing the results from in-depth interview methods between the elderly and medical staff. As a result of this study, guidelines for Service design application of health vulnerability management for the elderly utilizing smart phones were presented. Therefore, this study presented four prerequisites composed of 'high level of supplementation and ethical decision making', 'improvement of inequality in accessibility and experience', 'resolving problems in policy implementation' and 'user-friendliness' for the Smart Healthcare service design for the elderly. Overall, Service design is expected to play an innovative role in improving the quality of life for the elderly through the process of collecting and delivering information on Smart Healthcare centered on the experience of the elderly.

• International Journal of Advanced Culture Technology
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• 제9권1호
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• pp.152-161
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• 2021

We study is to confirm the influence of the manager's learning support leadership perceived by the organizational members of small and medium-sized ICT companies on the learning agility and job satisfaction of the organizational members. In addition, this study was to confirm the relationship between learning agility and job satisfaction and the mediating effect of learning agility. To this end, the statistical package program SPSS 24.0 and SPSS PROCESS Macro Model were used for 352 copies. In other words, the results of analysis through frequency analysis, reliability analysis, factor analysis, regression analysis, and bootstrapping method to verify the established research hypothesis are as follows. First, the leadership of the manager's learning support showed a positive effect on job satisfaction. Second, the leadership of the manager's learning support showed a positive effect on learning agility. Third, learning agility was statistically significant in job satisfaction. Fourth, learning agility showed a mediating effect between learning support leadership and job satisfaction. As shown in the results of this study, it was shown that in order to improve the job satisfaction of organizational members, the learning support leadership of the manager and the learning agility of the members can be systematically improved. In other words, in terms of strategic human resource management and strategic human resource development, the organization was required to establish systematic systems and continue to implement them. In particular, there was a need for the development and operation of programs that could develop and improve competency for learning support leadership and learning agility.

• Journal of Information Science Theory and Practice
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• 제10권3호
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• pp.40-56
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• 2022

This paper aims to implement a topic modeling technique for extracting the topics of online discussions among library professionals in India. Topic modeling is the established text mining technique popularly used for modeling text data from Twitter, Facebook, Yelp, and other social media platforms. The present study modeled the online discussions of Library and Information Science (LIS) professionals posted on Lis Links. The text data of these posts was extracted using a program written in R using the package "rvest." The data was pre-processed to remove blank posts, posts having text in non-English fonts, punctuation, URLs, emails, etc. Topic modeling with the Latent Dirichlet Allocation algorithm was applied to the pre-processed corpus to identify each topic associated with the posts. The frequency analysis of the occurrence of words in the text corpus was calculated. The results found that the most frequent words included: library, information, university, librarian, book, professional, science, research, paper, question, answer, and management. This shows that the LIS professionals actively discussed exams, research, and library operations on the forum of Lis Links. The study categorized the online discussions on Lis Links into ten topics, i.e. "LIS Recruitment," "LIS Issues," "Other Discussion," "LIS Education," "LIS Research," "LIS Exams," "General Information related to Library," "LIS Admission," "Library and Professional Activities," and "Information Communication Technology (ICT)." It was found that the majority of the posts belonged to "LIS Exam," followed by "Other Discussions" and "General Information related to the Library."

• 트랜스-
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• 제13권
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• pp.35-58
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• 2022

본 연구는 인공지능 기술의 발전이 음악 콘텐츠 제작에 가져올 패러다임의 변화를 예측하고, 인공지능과 인간의 협업을 통해 창작된 작품이 완성품으로써 예술적 가치를 지닐 수 있음을 제기한다. 인공지능 작곡 프로그램을 활용하여 누구나 손쉽게 음악 콘텐츠 제작을 할 수 있으며, 예술가에게는 다양한 시도와 창의적인 발상에 영감을 줄 수 있는 계기가 됐다. 인공지능 기술이 인간의 삶에 편리성을 제공하고, 일의 효율적인 측면에 많은 혜택을 주고 있지만, 현재까지 예술 영역에서 데이터 기반의 패턴 음악이라는 인식에서 벗어나기 어려운 점이 있다. 이러한 정량적인 요소가 많은 패턴 음악은 예술이 추구하는 추상적인 상징성이나 의미가 부재되어 완전한 창작품으로써 인정받지 못하고 있는 실정이다. 그러나 인간의 협업을 통해 감정이나 창의성과 같은 정성적인 요소를 인공지능 음악에 부여하면 완전한 예술 작품으로써 가치를 인정받을 수 있음을 예측한다. 인공지능 기술의 발전은 대중들에게 문화·예술에 대한 접근성을 높여주고, 심미적인 체험과 더불어 누구나 즐길 수 있는 유희적인 측면까지 기대할 수 있다. 또한, 개인의 디지털 리터러시의 향상을 통해 다양한 콘텐츠를 제작할 수 있으며, 자신의 작품을 타인에게 공유하며 소통할 수 있는 계기가 된다. 이처럼 인공지능 기술은 대중과 문화·예술을 잇는 매개체 역할을 하고 있으며, 예술 활동을 통해 인간과 기술을 간극을 좁히고 있다. 이러한 문화적인 현상과 함께 예술적 가치를 지닌 인공지능 음악 콘텐츠 제작 연구와 향후 인공지능 기술을 활용한 다양한 융·복합 예술 콘텐츠의 발전 가능성을 전망해 본다.

• 마케팅과학연구
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• 제19권2호
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• pp.17-26
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• 2009

As the lifestyle of consumers changes and the need for various products increases, new products are being developed in the market. Each household owns various home appliances which are purchased through the choice of a decision maker. These appliances include not only large-sized products such as TV, refrigerator, and washing machine, but also small-sized products such as microwave oven and air cleaner. There exists latent correlation among possession of home appliances, even though they are purchased independently. The purpose of this research is to analyze the effect of demographic factors on the purchase and possession of each home appliances, and to derive some relationships among various appliances. To achieve this purpose, the present status on the possession of each home appliances are investigated through consumer survey data on the electric and energy product. And a multivariate probit(MVP) model is applied for the empirical analysis. From the estimation results, some appliances show a substitutive or complementary pattern as expected, while others which look apparently unrelated have correlation by co-incidence. This research has several advantages compared to previous literatures on home appliances. First, this research focuses on the various products which are purchased by each household, while previous researches such as Matsukawa and Ito(1998) and Yoon(2007) focus just on a particular product. Second, the methodology of this research can consider a choice process of each product and correlation among products simultaneously. Lastly, this research can analyze not only a substitutive or complementary relationship in the same category, but also the correlation among products in the different categories. As the data on the possession of home appliances in each household has a characteristic of multiple choice, not a single choice, a MVP model are used for the empirical analysis. A MVP model is derived from a random utility model, and has an advantage compared to a multinomial logit model in that correlation among error terms can be derive(Manchanda et al., 1999; Edwards and Allenby, 2003). It is assumed that the error term has a normal distribution with zero mean and variance-covariance matrix ${\Omega}$. Hence, the sign and value of correlation coefficients means the relationship between two alternatives(Manchanda et al., 1999). This research uses the data of 'TEMEP Household ICT/Energy Survey (THIES) 2008' which is conducted by Technology Management, Economics and Policy Program in Seoul National University. The empirical analysis of this research is accomplished in two steps. First, a MVP model with demographic variables is estimated to analyze the effect of the characteristics of household on the purchase of each home appliances. In this research, some variables such as education level, region, size of family, average income, type of house are considered. Second, a MVP model excluding demographic variables is estimated to analyze the correlation among each home appliances. According to the estimation results of variance-covariance matrix, each households tend to own some appliances such as washing machine-refrigerator-cleaner-microwave oven, and air conditioner-dish washer-washing machine and so on. On the other hand, several products such as analog braun tube TV-digital braun tube TV and desktop PC-portable PC show a substitutive pattern. Lastly, the correlation map of home appliances are derived using multi-dimensional scaling(MDS) method based on the result of variance-covariance matrix. This research can provide significant implications for the firm's marketing strategies such as bundling, pricing, display and so on. In addition, this research can provide significant information for the development of convergence products and related technologies. A convergence product can decrease its market uncertainty, if two products which consumers tend to purchase together are integrated into it. The results of this research are more meaningful because it is based on the possession status of each household through the survey data.

• 벤처창업연구
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• 제15권5호
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• pp.221-233
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• 2020

본 연구는 전통시장 청년몰 청년상인의 창업성과에 영향을 미치는 요인에 관해 선행연구를 기반으로 도출된 주요 변수들의 관계를 증명하고, 결과를 바탕으로 주요 요인들 간의 관계를 실증적으로 분석하는 데 목적이 있다. 전통시장 청년몰 창업성과에 미치는 요인을 정부지원 프로그램, 기업가정신으로 구분하고 정부지원 프로그램과 창업성과 및 기업가정신과 창업성과 간의 영향력을 매개하는 변수로 창업준비성과 상인과의 협력을 설정하였다. 분석결과 기업가정신은 창업준비성에 통계적으로 유의한 정(+)의 영향을 미치는 것으로 나타났으며, 정부지원 프로그램, 기업가정신, 창업준비성은 창업성과에 유의한 정(+)의 영향을 미치는 것으로 나타났다. 또한, 연구모형의 매개효과를 검증한 결과, 기업가정신이 창업준비성을 매개하여 창업성과에 미치는 간접효과가 유의한 것으로 검증되었다. 본 연구를 통하여 정부지원 프로그램이 현재의 일관적인 지원이 아닌 청년상인의 특성을 고려하여 지원해야 함을 시사하며, 청년상인 모집과 선발, 육성단계에서 철저한 검증 및 기업가정신 및 창업준비성이 높은 청년상인을 선발해야 함을 의미한다.