• 한국IT서비스학회지
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• 제18권1호
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• pp.153-171
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• 2019

Competition among cities has become fierce with decentralization and globalization, and each city tries to establish a brand image of the city to build its competitiveness and implement its policies based on it. At this time, surveys, expert interviews, etc. are commonly used to establish city brands. These methods are difficult to establish as sampling methods an empirical component, the biggest component of a city brand. In this paper, therefore, based on the precedent research's urban brand measurement and components, the words representing each city image property were extracted and relocated to five indicators to form the evaluation index. The constructed indicators have been validated through the review of three experts. Through the index, we analyzed the brands of four cities, Ulsan, Incheon, Yeosu, and Gyeongju, and identified the factors by using Topic Modeling and Word Cloud. This methodology is expected to reduce costs and monitor timely in identifying and analyzing urban brand images in the future.

• Asian Journal of Innovation and Policy
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• 제10권1호
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• pp.1-38
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• 2021

The paper examines the role of the informal sector on innovation activities of urban formal manufacturing enterprises in India. It provides empirical evidence on firm-level linkages between formal and informal sectors by using the World Bank Enterprise Survey, 2013-14 and the Innovation Follow-up survey, 2014. Primarily, the paper aims to examine the effect of informal sector competition on innovation in urban formal manufacturing enterprises in India. Secondly, the paper analyses the mediation effect of informal sector competition on innovations in the urban manufacturing enterprises. It determines the direct and indirect influence of business regulations and constraints on innovation outcomes through the mediation effect of informal sector competition by using the SEM "Structural Equation Modeling" guidelines. The econometric results show that informal sector competition has a negative effect on the introduction of product innovations while industry-level informal sector competition has a positive effect on product innovation through the local knowledge spillovers from the informal to the formal sector. However, the informal sector competition was found to have no significant effect on the probability of introducing process innovations. Further, the results show the inhibitive role of informal sector competition on innovation in urban formal manufacturing enterprises is more severe for firms with heavy regulatory burdens and is relatively weakened in firms with resource constraints. This suggests that the informal sector plays an important role in the NIS (National Innovation System) in India.

• The Journal of Asian Finance, Economics and Business
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• 제8권4호
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• pp.929-937
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• 2021

This present research seeks to explore the empirical evidence about the relation between quality of destination and Islamic attribute of destination on tourist satisfaction. This research was conducted at the tourism sector in West Java, Indonesia. The participants were Muslim foreign tourists who were traveling to West Java, Indonesia. The total number of participants in the research was 200. Data collection was carried out using a questionnaire. Hypotheses were tested using structural equation modeling methods with AMOS version 23. The exogenous variables in this research consisted of the quality of the destination and Islamic attribute of destination. Tourist satisfaction was an endogenous variable in this research. We used a quantitative approach and structural equation modeling to examine the research hypotheses. The results showed that there was a positive and significant effect of the quality of destination on the tourist satisfaction, and the quality of destination positively affected Islamic attribute of destination, but Islamic attribute of destination had no significant effect on tourist satisfaction. We also found that Islamic attribute of destination did not mediate the relation between quality of destination and tourist satisfaction. We provided recommendations to strengthen or improve the quality of destination in order to increase tourist satisfaction.

• 유통과학연구
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• 제21권2호
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• pp.7-20
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• 2023

Purpose: With the unique feature of O2O, consumers are now able to check the profile of the services and products online and then consume them in offline venues or vice versa. This study provides motivation and practical implications about online-to-offline (O2O) distribution channels and investigates the relationship between economic values, service consistency and brand identity attractiveness in the O2O distribution channel. Then identify the impact of brand identity attractiveness on the performance (reputation and reuse intention). Research design, data, and methodology: Structural equation modeling (SEM) has been used to investigate the relationship between economic value and brand identity attractiveness, which affects the reputation and reuse intention of services in O2O. Results: Empirical results show the positive and significant impact of economic value and service consistency on brand identity attractiveness which results the positive and significant impact on performance (reputation and reuse intention) in O2O. Conclusion: In the O2O distribution channel, economic value is an important aspect for the attractive image and brand identity. On the other side, brand identity attractiveness is important for the bright future of O2O services, continuous growth, achieving the distinct goal, keeping good promises with customers, and a better reputation of O2O services in distribution channels.

• The Journal of Asian Finance, Economics and Business
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• 제9권1호
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• pp.43-51
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• 2022

Platform lending or online lending, sometimes called peer-to-peer (P2P) lending, arose due to the digital revolution to meet people's requirements for simple fund borrowing. It quickly became an alternative to other traditional lending techniques, for example, loans banks. Along with the growth of P2P lending, several academics have investigated how information technology is used in financial services, emphasizing extended application methods. This study proposes an enhanced technology acceptance model (TAM) that investigates how consumers embrace P2P lending platforms by using quality of service and perceived risk as drivers of trust, relative advantage and compatibility as drivers of perceived usefulness. For the purpose of this study, we created a questionnaire, distributed it to clients of P2P lending platforms and fintech services in general in cities in Java, Indonesia. We received 290 replies to our questionnaire. The data was analyzed to test the hypotheses using structural equation modeling (SEM). The findings show that consumers' trust, relative advantage, perceived usefulness, and perceived ease of use in P2P lending platforms substantially affect their views toward adoption. The research's findings are useful for fine-tuning platform marketing strategies and putting strategic goals into action.

• Nuclear Engineering and Technology
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• 제56권5호
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• pp.1902-1912
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• 2024

This paper presents results from system-level modeling of a water-based reactor cavity cooling system using RELAP5-3D. The computational model is benchmarked with experimental data from a half-scale RCCS test facility at Argonne National Laboratory. The model prediction is first compared with a two-phase oscillatory baseline experimental case where mixed accuracy is obtained. The model shows reasonable prediction of mass flow rate, pressure, and temperature but significant overprediction of void fraction. The model prediction is then compared with a fault case where the inlet of the risers is gradually reduced using a throttling valve. As the valve is closed, the model is able to predict some major flow phenomena observed in the experiment such as the dampening of oscillations, the reintroduction of oscillations, as well as boiling, flashing, and geysering in the risers. However, the timeline of these events are not well captured by the model. The model is also used to investigate the evolution of flow regime in the chimney. This work highlights that the semi-empirical constitutive relations used in RELAP-3D could have a strong influence on the accuracy of the model in two-phase oscillatory flows.

• Geomechanics and Engineering
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• 제39권1호
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• pp.105-113
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• 2024

Recently, electrical resistivity surveys have been used to obtain information related to underground structures including burial structure type and depth. However, various field conditions hinder understanding measured electrical resistance, and thus there is a need to understand how various geometries affect electrical resistance. This study explores the effect of geometric parameters of a structure and electrodes on electrical resistance in the framework of the finite element method. First, an electrical resistance module is developed using the generalized mesh modeling technique, and the accuracy of the module is verified by comparing the results with the analytical solution for a cylindrical electrode with conical tip. Then, 387 cases of numerical analysis including geometric parameters of a buried structure and electrodes are conducted to quantitatively estimate the detection depth under a steady-state current condition. The results show that electrical resistance is increased as (1) shallower burial depth of structure, (2) closer distance between ground electrode and structure, (3) longer horizontal electrode distance. In addition, the maximum detection depth corresponding to converged electrical resistance is deeper as (4) closer distance between ground electrode and structure, (5) shorter horizontal electrode distance. The distribution of the electric potential around the electrodes and underground structure is analyzed to provide a better understanding of the measured electrical resistance. As engineering purpose, the empirical equation is proposed to calculate maximum detection depth as first approximation.

• Asia Marketing Journal
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• 제8권1호
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• pp.1-17
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• 2006

다양한 선행연구에서 준거가격효과는 실증적 지지를 받아온 것이 사실이다. 그러나 대부분의 선행연구에서 간과된 부분은 설명되지 않은 소비자 반응의 이질성이 준거가격에 반영되어 실재하지 않는 효과가 마치 유의한 것으로 나타날 수도 있다는 것이다(Chang, Siddarth, and Weinberg 1999; Bell and Lattin 2000). 또 다른 차원의 이질성으로서, 고려상표군의 이질성이 반영되지 않을 경우 모델에 포함된 변수의 모수추정치에 왜곡현상이 나타날 수 있음을 Meyer and Kahn(1991)이 지적한 바 있다. 이러한 선행연구의 문제점을 고려하여 이 연구에서는 반응의 이질성과 고려상표군의 이질성을 모두 반영한 모델을 적용함으로써 보다 정확한 준거가격효과의 추정을 시도하였다. 또한 소비자별 고려상표군의 이질성을 반영한 준거가격 측정치를 새롭게 제안하여 검증하고자 하였다. 실증분석결과, 제안된 준거가격 측정치가 선행연구에서 사용한 측정치에 비해 모델적합도와 예측타당성을 향상시키는 것으로 나타났다. 이 결과는 준거가격 형성과정에도 고려상표군의 이질성이 반영됨을 실증하는 것이다. 고려상표군의 이질성이 반영될 경우, 선행연구의 준거가격 측정치에 비해서, 제안된 준거가격 측정치의 평균이 높게 나타났으며, 표준편차는 감소한 것으로 나타났다. 이 연구에서 제안된 측정치의 실제적인 적용 측면을 본다면, Greenleaf(1995)의 연구에서처럼, 최적의 가격정책이 손실회피(loss aversion)의 크기, 즉, 준거의존(reference-dependent) 모델상의 준거가격에 의존한다면 제안된 측정치가 유용하게 사용될 수 있을 것으로 판단된다. 최대화해야 할 이익함수에 포함된 준거가격 측정치의 정확성이 최적가격결정을 좌우하기 때문이다. 따라서, 준거가격모델에 근거하여 최적가격을 추정할 경우, 모델자체에 고려상표군과 반응의 이질성을 반영할 뿐만 아니라, 준거가격 측정치 또한 고려상표군의 이질성을 반영하는 것이 바람직할 것으로 판단된다.

• 대한전자공학회논문지SD
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• 제47권10호
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• pp.1-6
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• 2010

본 연구에서는 S-파라미터 측정 데이터를 사용하는 RF측정방법으로 short-channel MOSFET의 RF 캐패시턴스 전압(C-V) 곡선을 상온에서 $225^{\circ}C$까지 추출하였으며, 추출된 고온 종속 특성을 엠피리컬하게 모델링하였다. RF C-V 특성곡선의 weak inversion영역에서 온도 변화에 따른 voltage shift가 threshold voltage shift보다 적은 현상이 관찰되었지만, 기존 long-channel C-V 이론 방정식으로 설명할 수 없는 현상임이 입증되었다. 이러한 short-channel C-V 곡선의 고온 종속 모델링을 위해서 새로운 엠피리컬 방정식이 개발되었다. 이 방정식의 정확도는 모델된 C-V곡선과 측정 데이터가 넓은 온도범위에서 잘 일치하는 결과를 관찰함으로써 입증되었다. 또한, 높은 게이트 전압에서는 온도가 증가함에 따라 채널 캐패시턴스 값이 감소하는 것을 확인할 수 있다.

• 설비공학논문집
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• 제19권8호
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• pp.563-568
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• 2007

The air-side particulate fouling in the heat exchangers of HVAC applications degrades the performances of cooling capacity, pressure drop across a heat exchanger, and indoor air quality. Indoor and outdoor air contaminants foul heat exchangers. An empirical modeling equation has been derived from the experimental results using accelerated tests and it showed good predictions of the fouling characteristics of the slitted finned tube heat exchangers. However the modeling equation predicts only the fouling characteristics of new heat exchangers and it can not predicts fouling characteristics obtained from actual field data which contains the effect of hydrophilicity deterioration. Therefore an modified modeling equation is proposed and it shows good predictions of the actual fouling characteristics of finned-tube heat exchangers.