• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제1권1호
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• pp.83-104
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• 1997

This paper studies parameter estimation for a first-order hyperbolic integro-differential equation modelling one-sex population dynamics. A second-order finite difference scheme is used to estimate parameters such as the age-specific death-rate and the age-specific fertility from fully discrete observations on the population. The function space parameter estimation convergence of this scheme is proved. Also, numerical simulations are performed.

• The Journal of Asian Finance, Economics and Business
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• 제8권7호
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• pp.657-669
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• 2021

This study seeks to empirically investigate the impact of transformational leadership on employees' innovation with the mediating effect of technological diversity. Employees have evolved into leaders in organizing work within institutions over the last few decades. This shift presents new demands for leaders, who are forced to reinvent individual workers while also improving workplace innovation. This research proposes a conceptual model for considering transformational leadership and the impact of technological diversity on innovation. Structured questionnaire is used in the study and the analysis of the data from 633 employees of universities in the United Arab Emirates uses stratified sampling technique and hypotheses verified through Structural Equations Modelling (AMOS-21). According to the results, transformational leadership has a big effect on employees' innovation. Furthermore, in the relationship between transformational leadership and workforce innovation, technological diversity has a partial mediation impact. This research adds to the growing body of knowledge about how transformational leadership influences employees' innovation and how it affects employees' success, especially in the context of UAE-based universities. Overall, this research contributes to the previous studies wherein transformational leadership plays a critical role in influencing the innovative performance of employees and that, in turn, will promote diversification of technology in the organization.

• Journal of Information Science Theory and Practice
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• 제11권3호
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• pp.1-15
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• 2023

The present study examines the impact of value co-creation on satisfaction and intention to adopt of e-resources among users. Four components of the DART model have been adopted to describe value co-creation. These components are dialogue, access, risk-assessment, and transparency. Ph.D. scholars and faculty members from National Capital Region, India, were requested to respond on a five-point Likert scale. A total of 220 responses were collected with the help of a structured questionnaire from respondents of the top 50 business schools according to National Institute Ranking Framework. These responses have been analysed by means of structured equation modelling on Adanco 2.2 software. Findings of the study reported the insignificant impact of access and risk-assessment, and positive impact of dialogue and transparency on satisfaction. Further, satisfaction has been identified, creating significant impact on adoption of e-resources. Such findings reflect the real picture of customer experience with respect to their role in co-creation of e-resources. Respondents have conveyed their dissatisfaction with the co-creation process of e-resources, as companies do not provide all the information and access to their customers beforehand. Consequently, customers fail to make informed decisions and also find themselves unable to show trust in the service providers of e-resources.

• 한국IT서비스학회지
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• 제8권2호
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• pp.229-245
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• 2009

The Korean mobile telecommunication service market is faced with a tremendous competitive period, in which the market is entering into the maturity stage with launching of the 3rd generation service and with introduction of mobile number portability. In general, it is more important to sustain the old customers than to attracting new customers, as the life cycle of an industry is entering the maturity stage in which the growth rate of new customers is decreasing gradually or becoming stagnant. Thus, mobile telecommunication business has to seek a way to maintain the existing customers instead of promoting new customers. So this study investigates whether the service quality of mobile telecommunication could have effects on the switching barrier of the industry. In order to test the hypothesis on the effects of service quality of mobile telecommunication in Korea on switching barrier, this study collected the questionnaire response data of students including middle and high school students and undergraduates, who are regarded as the major customers in that mobile telecommunication industry.

• Water Engineering Research
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• 제6권1호
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• pp.17-30
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• 2005

The bed evolution of the stretch of the River Rhine between km-812.5 and km-821.5 is characterised by general bed degradation as a result of the river training works and dredging activities of the last two centuries. The degradation of the river bed affects the water levels, and so the navigation conditions. To combat the erosion of the river bed with the aim to keep up the shipping traffic and to avoid the ecological system damages due to water level reductions, sand-gravel-mixtures were added to the river (so called artificial grain feeding activities). This paper presents the results of an application of a graded sediment transport model in order to study morpholodynamical characteristics due to artificial grain feeding activities in the river stretch. The finite element code TELEMAC2D was used for flow calculation by solving the 2D shallow water equation on non-structured grids. The sediment transport module SISYPHE has been developed for graded sediment transport using a multiple layer model. The needs to apply such graded sediment transport approaches to study morphological processes in the domain are discussed. The calculations have been carried out for the case of middle water flow and different size-fraction distributions. The results show that the grain feeding process could be well simulated by the model.

• 산경연구논집
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• 제12권2호
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• pp.19-27
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• 2021

Purpose: This study investigated the impact of key factors such as service quality, perceived benefit and brand familiarity on a consumer's intention to order online food delivery (OFD). In addition, mediating effect of electronic word of mouth (e-WOM) between relationships among selected key variables and OFD purchase intention is also assessed. Research design, data and methodology: This explanatory, quantitative study employed convenience sampling and collected data through online structured questionnaire from 304 respondents who are users of OFD apps based in greater Klang valley region of Malaysia. The data was then subjected to normality and reliability assessment followed by confirmatory factor analysis, validity assessment and structural equation modelling using IBM SPSS AMOS 24.0. Results: Findings revealed that service quality, perceived benefits and brand familiarity affects purchase intention positively and significantly. Perceived benefits demonstrated highest impact on purchase intention followed by brand familiarity and service quality. Findings also suggest that e-WOM fully mediates relationship between brand familiarity and purchase intention, however, the same was not observed for remaining two variables. Conclusions: The study has enriched OFD literature by investigating impact of selected key factors on purchase intention in the context of OFD. Implications, limitations and future research avenues are then discussed.

• The Journal of Asian Finance, Economics and Business
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• 제8권4호
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• pp.959-969
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• 2021

This study aims to develop new constructs and indicators for sharia destination image, and then examine its effects on perceived value, tourist satisfaction, and post-visit behaviour. Furthermore, it analyses the mediating role of perceived value and tourist satisfaction on relationship between sharia destination image and post-visit behaviour. The population were domestic and Malaysian Muslim tourists who visited Aceh during the study period. The sampling was carried out in two stages. The first stage involved selecting most visited districts. The second stage involved randomly selecting tourists who visit during the study period in the districts. Data was collected using a structured questionnaire with a Likert scale. Also, a total of 270 questionnaires were distributed to domestic and Malaysian tourists in Aceh. Cluster sampling was used to determine the sample area, and purposive sampling technique was used to determine the study sample. Furthermore, the data analysis technique is Structural Equation Modelling. The results showed that the sharia destination image has a significant effect on perceived value. Meanwhile, the perceived value significantly influenced tourist satisfaction and post-visit behaviour. In addition, the perceived value and tourist satisfaction can mediate the effects of sharia destination image, which has no direct effect on post-visit behaviour.

• 벤처혁신연구
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• 제1권1호
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• pp.113-127
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• 2018

본 연구의 목적은 공조직을 대상으로 조직신뢰의 결정요인 및 조직유효성에 미치는 영향을 탐구하는데 있었다. 연구를 위해서 조직신뢰의 결정요인으로는 조직의 배려, 공정성, 도덕성, 조직의 역량 및 사회적 책임의 5가지 요인을 검토하였으며, 조직유효성 지표로는 직무만족, 조직몰입 및 이직의도 3 변수를 사용하였다. 연구를 위해서 경기도 지자체에 근무하는 323명의 공무원으로부터 구조화된 질문지를 이용하여 자료를 수집하였으며, 수집된 자료는 구조방정식모형을 사용하여 분석하였다. 분석결과 조직의 배려, 공정성, 도덕성, 조직의 역량 및 사회적 책임 다섯 요인이 모두 조직신뢰의 형성에 긍정적인 영향을 미치며, 또한 조직신뢰는 조직유효성 지표인 직무만족 및 조직몰입에 긍정적 영향을, 그리고 이직의도에는 부적인 영향을 미치는 것으로 나타났다.

• 한국콘텐츠학회논문지
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• 제13권6호
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• pp.246-259
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• 2013

본 연구는 60세 이상 노인들을 대상으로 노인들의 생활만족도에 미치는 결정요인들의 차별적 영향을 탐구하는데 그 목적이 있으며, 이를 위해서 노인 생활만족도 결정요인으로 다양한 건강, 경제, 여가활동, 사회적 지지 및 심리 요인 관련 변수들을 포괄적으로 검토하였다. 본 연구를 위해 서울 소재 10개 노인종합복지관, 노인대학 및 노인문화센터의 여가활동 프로그램에 참여하고 있는 60세 이상 노인 347명을 대상으로 자료를 수집하였다. 자료수집방법으로는 구조화된 설문지를 사용하였으며, 가설검증을 위한 주된 자료분석방법으로는 구조방정식모형분석기법을 사용하였다. 연구결과 건강요인인 주관적 건강상태, 경제적 요인인 주관적 경제수준, 여가활동요인인 생산적 여가활동과 소비적 여가활동, 사회적지지 요인인 배우자 지지와 자녀지지 그리고 심리적 요인인 자아존중감과 외향성이 노인의 생활만족도에 유의미한 영향을 미치는 것으로 나타났다. 본 연구결과가 갖는 이론적 실천적 함의를 논의하고 향후 연구방향을 제시하였다.

• 벤처창업연구
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• 제10권6호
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• pp.89-98
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• 2015

본 연구에서는 정부의 창업지원정책이 창업가정신과 창업의지에 미치는 영향을 탐구하였다. 본 연구의 목적을 위해서 창업지원정책 변수로는 교육지원, 자금지원 및 마케팅지원의 세 변수를 검토하였으며, 창업가정신 변수로는 혁신성, 진취성 및 위험감수성의 세 변수를 검토하였다. 본 연구를 위한 자료는 정부의 창업지원정책에 참여한 경험이 있는 331명의 기창업자 및 예비창업자들로부터 수집하였다. 자료수집도구로는 구조화된 자기기입식 질문지를 사용하였으며, 수집된 자료는 구조방정식모델기법을 이용하여 분석하였다. 분석결과 창업가정신(혁신성, 진취성 및 위험감수성)은 창업의지에 직접적인 정의 영향을 미치는 것으로 나타났으며, 세 종류의 창업지원정책(교육지원, 자금지원 및 마케팅지원)은 창업가정신에는 직접적인 정의 영향을 미치는 반면에 창업의지에 대해서는 창업가정신을 통해서 간접적으로만 정의 영향을 미치는 것으로 나타났다. 이러한 본 연구의 발견결과가 갖는 이론적 및 정책적 함의를 논의하였으며, 향후 연구를 위한 제언을 제시하였다.