농업용수 공급량과의 비교를 통한 논벼 증발산량 산정 방법 평가

김상현,조건호,최경숙,Kim, Sanghyun,Cho, Gunho,Choi, Kyungsook 한국수자원학회 2020 한국수자원학회논문집 Vol.53 No.12

This study assessed evapotranspiration (ET) methods applying for estimation of paddy rice water demand based on agricultural water supply. The Modified Penman (MP) method and the Penman-Monteith (PM) method recently suggested by Rural Development Administration (RDA) were considered. The 6 Korea Rural Community Corporation (KRC) command areas located in Honam province were selected in this study. The climate characteristics were also analysed with the average annual and the growing season temperatures and rainfalls. As a result, the annual average and the growing season temperature showed the increased trend while the rainfall tended to decrease during 30 years. The paddy rice water demand found to be directly influenced by these climate trends as ET also affected by them. The higher values of paddy rice water demand were obtained from applying MP method compared to the one applying PM method. The lower differences were also obtained from MP method for the comparisons between the paddy rice water demand estimated by both methods with agricultural water supply. Therefore, these results suggest that the MP method is more desirable to use for estimating paddy rice water demand in order to achieve stability of irrigation designs and plans.

소셜커머스의 쇼핑 가치와 재구매의도에 영향을 미치는 개인 및 소셜커머스 특성과 지각된 보안의 조절효과에 대한 연구

김상현(Sanghyun Kim),박현선(HyunSun Park) 한국IT서비스학회 2013 한국IT서비스학회지 Vol.12 No.2

Web 2.0 has affected existing e-commerce and created a new business model of e-commerce, known as social commerce. Social commerce is a subset of e-commerce using social network services and is emerging as an impartant platform due to increased popularity of social networking services. This study focuses on analyzing the factors that influence the shopping value and intention to repurchase of social commerce users. Based on prior researches, we develop a research model, including individual characteristics of social commerce users (Collectivism. Price Sensitivity, Impulse Buying) and social commerce characteristics (Cost saving, Product Variety, Shopping Convenience). Furthermore, this study proposed the moderating effect of Perceived Security and the relationship between shopping value and intention to repurchase. To empirically validate, the data were collected from 220 social commerce users. The results indicated that individual characteristics (collectivism, price sensitivity, impulse buying) were positively related to hedonic shopping value. In addition, social commerce characteristics (cost saving, shopping convenience) were positively related to utilitarian value. The shopping value(hedonic and utilitarian) had a significant influence on intention to repurchase. The moderating effects of perceived security also was significant. Lastly, the implications for theory and practice are discussed.

RFID(Radio Frequency Identification)기술 수용의도에 미치는 요소와 의사결정권자의 영향에 대한 실증연구

김상현(SangHyun Kim) 한국산업경영학회 2008 경영연구 Vol.23 No.3

본 연구는 RFID기술 수용의도에 미치는 요소들에 대해 실증적으로 연구한다. RFID기술은 유비쿼터스 컴퓨팅의 한 기술로써 유비쿼터스 사회를 실현하기 위한 혁신적인 기술이다. 하지만 사용자 관점에서 RFID기술이 갖는 몇 가지 특성으로 인해 아직 현대사회 경영환경 및 실생활로의 적용과 RFID기술 수용의도에 대한 이론적인 연구는 아주 미비하다. 따라서 본 연구에서는 RFID기술 수용의도에 긍정적인 영향을 미치는 6가지 요소들을 제안하였다. 6개의 외부변수에는 시스템통합(SI), 표준화(S), 지각된 비용축소(PCS), 지각된 이익(PB), 재정적 능력(FC), 기술적 능력(TC) 등이며, 기술적 영향요소, 인지적 영향요소 그리고 기술 준비성 등의 세 개의 범주로 분류 하였다. 또한 기업의 의사결정권자를 RFID기술 사용태도와 수용의도에서 조절변수로 어떤 영향이 있는지에 대해서도 검증하였다. 본 연구는 총 215명의 설문을 통해 얻은 데이터를 구조방정식을 통해 연구모형을 검증하였으며, 본 연구에서 제시된 가설을 증명하였다. 제시된 결과의 내용은 미래의 유비쿼터스 환경에서 RFID기술 수용의도에 대한 사용자의 행동연구에 새로운 이론적인 프레임을 제시하고 있으며 RFID기술 개발자 및 판매자들이 고려해야 할 점을 제시하고 있다. This study investigate the key variables influencing organizational intention to use RFID(Radio Frequency Identification) technology. RFID technology is a key technology to accomplish ubiquitous environment in business and daily life. However, research on RFID technology has been scant due to unique characteristics of it. Therefore, this study suggests three influential factors that include six variables – System Integration(SI), Standardization(S), Perceived Cost Savings(PCS), Perceive Benefits(PB), Financial Capability(FC), and Technical Capability(TC) – impacting on organizational intention to use RFID technology via attitude toward using RFID technology. In addition, this study proposes the moderating effect of Presence of Champions(PC). The research model was tested using Structural Equation Modeling, via AMOS 7.0 analysis on a sample collected from 215 employees. Results provide evidence that support the tested hypotheses. The implications of the findings suggest a new theoretical framework for future ubiquitous research and offers suggestions that the developers of RFID technology should consider regarding the technology.

Social Business 참여에 영향을 주는 내ㆍ외재적 특성과 심리적 계약의 조절효과에 대한 실증연구

김상현(Sanghyun Kim),김근아(Geuna Kim) 한국IT서비스학회 2011 한국IT서비스학회지 Vol.10 No.4

Following the growth of e-Business, there has been a recent increase of interest in promoting Social Business (s-Business) based on Social Network Service(SNS). As the introduction of the Internet brought about the increasing number of its users followed by the growing market of e-Commerce, online games, and e-Learning, the increasing number of SNS users has opened the new markets combining the existing industrial fields with SNS, and it developed into a revenue model beyond the mere sharing of information. Despite such industrial and social environments, understanding of new social business technology from the aspect of business has been insufficient, and the empirical study on participation in the social business has been scant as well. Thus, the main purpose of this study is to investigate the s-Business in detail and to study the factors giving influence to the users’ participation in s-Business. This study proposes six variables(Self-Empowerment, Job Relevance, Formation of Social Capital, Relative Advantage, Shared Value, Relationship Specified Investment) and the moderating effects of Psychological Contract as influential factors closely related with s-Business. A total of 362 data from a survey were analyzed by using Structural Equation Modeling(SEM). Result showed that all factors with the exception of Job Relevance have meaningful influence on the intention to participate in s-Business. The implication of the findings suggests to compliment limitations of the existing researches, and to prepare the theoretical foundation for promoting s-Business participation in addition to further suggesting directionality from the view point of the users of the social business-relevant studies.

소셜 네트워크 서비스의 지속적 사용의도에 영향을 미치는 서비스 및 개인 특성에 대한 실증연구

김상현(Sanghyun Kim),박현선(Hyun-Sun Park) 한국IT서비스학회 2012 한국IT서비스학회지 Vol.11 No.3

Social network service(SNS), provided by social network sites such as Facebook, Twitter and Cyworld is rapidly growing in online business. Furthermore, many companies have growing interests in finding effective ways to use SNSs for their innovations, marketing and advertisement. In fact, firms have recognized the utility value of the SNS for their business. In this aspect, this study attempts to identify key factors influencing the intention to continuous use of SNSs. Based on the UTAUT(the Unified Theory of Acceptance and Usage of Technology)model, this study proposes the research model, including the effects of social network service characteristics(social relationship support, information sharing, image expression) and individual characteristics(self-disclosure, extroversion, familiarity) on performance expectancy as well as the moderating effect of perceived information security among UTAUT variables. The 412T sets of data collected in a survey were tested against the modeling using SEM using SmartPLS. Results indicated that social network service and individual characteristics had significant effect on performance expectancy with exception of self-disclosure. In addition, the moderating effect of perceived information security had significant effect. The results had important implications for firms providing SNSs hoping to develop a successful business model.

경사지 저층주거지 골목길 녹지배치에 따른 미세먼지(PM2.5) 저감 효과 CFD 시뮬레이션 연구

김상현(Sanghyun Kim),배웅규(Woongkyoo Bae) 서울연구원 2020 서울도시연구 Vol.21 No.3

광의(廣義)의 무선이동기술 수용의도에 미치는 기술적 영향요소와 직무 적절성의 영향

김상현(SangHyun Kim),김판수(Pansoo Kim) 한국산업경영학회 2007 경영연구 Vol.22 No.4

  본 연구는 광의(廣義)의 개념의 무선이동기술(Mobile Wireless Technology: MWT)에 대한 개인의 사용의도와 사용에 미치는 주요요소에 대해 실증적으로 연구를 하는데 그 목적이 있다. MWT는 최근에 대중적으로 많은 인기가 있는 혁신적인 기술이지만, 많은 관심에 비해 이 기술 자체의 독특한 특성이 개인행동에 미치는 실증적 연구는 미비하다. 기술수용모형(TAM)에 기초하여, 본 연구는 새로운 변수와 변수간의 관계인 지각된 편재성(PQ), 지각된 도달성(PR)을 소개하고 PQ와 행동의도(BI)의 관계 그리고 PR과 BI의 관계를 조절하는 변수로서, 직무 적절성(JR)을 소개한다. 본 연구는 총 네 회사로부터 210명의 종업원을 대상으로 하여 설문을 받았으며, AMOS 5.0을 이용하여 구조방정식을 통한 검증을 하였으며, 본 연구를 통해 앞으로 무선이동기술 연구를 위한 새로운 이론적인 프레임을 제시하고 있으며 MWT의 개발자가 기술에 대해 고려해야 할 점을 제시하고 있다.   This study examines the key factors that influence an individual"s intention and use of Mobile Wireless Technology (MWT). MWT is the latest innovation and is the most popular technology, however, in spite of its huge interest, there is surprisingly little research regarding its unique characteristics. Based on the Technology Acceptance Model(TAM), this study proposes new variables and casual relations Perceived Ubiquity(PQ), Perceived Reachability(PR), and Job Relevance(JR) as a moderator between PQ and Behavioral Intention(BI), and PR and BI. The research model was tested using Structural Equation Modeling(SEM), via AMOS 5.0 analysis on a sample collected from 210 employees of four companies. Results provide evidence that support the tested hypotheses. The implications of the findings suggest a new theoretical framework for future IS/IT research and offers suggestions that the developers of MWT should consider regarding the technology.

리튬이온배터리 전기화학모델 파라미터의 민감도 분석

김상현(Sanghyun Kim),김성윤(Seongyoon Kim),최정일(Jung-Il Choi) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

홈스쿨링의 정당성 논의: 부모의 자녀교육권을 중심으로

김상현 ( Sanghyun Kim ) 경북대학교 중등교육연구소 2021 중등교육연구 Vol.69 No.3

코로나19 사태는 우리 사회에 큰 변화를 가져왔다. 그 중 가장 눈에 띄는 변화는 사회의 여러 영역에 걸쳐 비대면 문화가 확산되었다는 것이다. 교육에서도 예외 없이 코로나19의 확산으로 인해 가정에서 비대면으로 수업이 이어져 오고 있으며, 학생들은 학교가 아닌 가정에서 교육이 이루어지는 홈스쿨링을 경험하고 있다. 이러한 시대적인 상황은 위기의 상황이기도 하지만, 그동안 교육현장에서 뿐만 아니라 시민단체, 학계, 정치계에서 지속적으로 거론되고 사회적 요청이 있었던 홈스쿨링의 합법화에 대하여 제고하게 하는 중요한 계기로 삼을 수 있을 것으로 보인다. 홈스쿨링은 교육받을 권리와 관련되어 있으며, 특히 학생의 교육받을 권리를 실현하기 위한 부모의 교육권과 깊은 관련이 있다고 여겨진다. 따라서 이 연구에서는 부모의 자녀교육권을 중심으로 홈스쿨링의 정당성, 의무교육제도하에서 우리나라의 홈스쿨링은 어떻게 전개되어 왔는지, 그리고 다른 어느 때 보다도 왜 지금 홈스쿨링이 합법화되어야 하는지 그 이유에 대해 논의함으로써 우리가 경험하고 있는 교육의 위기상황에서 홈스쿨링이 그 대안적 교육의 형태 중 하나가 될 수 있음을 제의하고자 한다. The coronavirus-19 situation has brought a big change to our society. The most noticeable change among them is the spread of non-face-to-face culture across many areas of society. Without exception in education, classes have continued at home non face-to-face due to the spread of coronavirus, and students are experiencing homeschooling where education is conducted at home, not at school. This is a crisis situation, but it is expected to serve as an important opportunity to reconsider the legalization of homeschooling, which has been continuously mentioned and requested by civic groups, academia, and political circles as well as the educational scene. Homeschooling is associated with the right to education, especially with parents' right to educate in order to realize a student's right to education. Thus, the study will discuss the legitimacy of homeschooling by focusing on parents’ rights to educate children and how our homeschooling has developed under the compulsory education system. And finally the study will discuss why homeschooling should be legalized more than it has been before. In doing so, I suggest that homeschooling can be one of the alternative forms of education in the current crisis of education.

COVID-19 후각 이상에 대한 한의학적 고찰

김상현 ( Kim Sanghyun ),김종현 ( Kim Jong-hyun ) 대한한의학원전학회 2022 대한한의학원전학회지 Vol.35 No.2

Objectives : To analyze symptoms of olfactory dysfunction caused by COVID-19 from a Korean Medical Perspective. Methods : Previous studies dealing with olfactory dysfunction accompanying COVID-19 were studied and analyzed for general characterization. Physiology and pathology of olfactory functions within the classical texts of Korean Medicine were collected and analyzed, through which symptoms of olfactory dysfunction in COVID-19 were examined. Results : Olfactory dysfunction manifested in high ratios in the early stages of confirmed COVID-19 cases, at times independent of other nasal symptoms such as blockage or discharge. There was a high chance of loss of taste being accompanied, while mental problems such as a tendency to have difficulty concentrating were present as well. In most cases, recovery took one to two weeks. From a Korean Medical perspective, physiology of olfactory function is closely linked to the Lungs, Ancetral Qi[宗氣], and the Heart, while its dysfunction could be explained by pathological factors such as Wind-Cold, Fire stagnation, Qi deficiency, Wind stroke, etc. Conclusions : In the context of external contraction disease[外感病], olfactory dysfunction could be caused by problems in the Lungs and Stomach that are responsible for breathing, or the Heart which is involved in recognizing and differentiating scent. General characteristics of COVID-19 imply it to be closely related to the Heart. In clinical application, overall symptoms need to be considered in diagnosis and treatment planning, after which further approaches could made to determine the problem to be of the Lung and Stomach, or of the Heart.