• Smart Structures and Systems
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• 제15권3호
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• pp.593-608
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• 2015

In many of the industrialized countries an increasing amount of infrastructure is ageing. This has become specifically critical to bridges which are a major asset with respect to keeping an economy alive. Life of this infrastructure is scattering but often little quantifiable information is known with respect to its damage condition. This article describes how a damage tolerance approach used in aviation today may even be applied to civil infrastructure in the sense that operational life can be applied in the context of modern life cycle management. This can be applied for steel structures as a complete process where much of the damage accumulation behavior is known and may even be adopted to concrete structures in principle, where much of the missing knowledge in damage accumulation has to be substituted by enhanced inspection. This enhanced and continuous inspection can be achieved through robotic systems in a first approach as well as built in sensors in the sense of structural health monitoring (SHM).

• Smart Structures and Systems
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• 제21권2호
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• pp.171-185
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• 2018

Maintenance of deteriorated bridge structures has always been one of the challenging issues in developing countries as it is directly related to daily life of people including trade and economy. An effective maintenance strategy is highly dependent on timely inspections on the bridge health condition. This study is intended to investigate an approach for detecting bridge damage for the long-term health monitoring by use of copula theory. Long-term measured data for the seven-span plate-Gerber bridge is investigated. Autoregressive time series models constructed for the observed accelerations taken from the bridge are utilized for the computation of damage indicator for the bridge. The copula model is used to analyze the statistical changes associated with the modal parameters. The changes in the modal parameters with the time are identified by the copula statistical properties. Applicability of the proposed method is also discussed based on a comparison study among other approaches.

• International Journal of Internet, Broadcasting and Communication
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• 제7권1호
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• pp.10-14
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• 2015

Video Content owners seek to squeeze the maximum amount of revenue from their assets via distribution into more territories. Digital Cinema Package(DCP), trusted solution to distribute protected content to theaters, caters to relatively small user base, which limits revenue. With the growth of the Internet & other digital media, the economics of media content has changed dramatically. Security remains main concern to deliver content to millions of consumers using intelligent digital display devices like Tablets, Smartphones, Smart TVs, Desktop & Laptop. By making the video content available to this segment securely, content owners will benefit from increased revenue. Through this paper we propose Open Source HomeDCP model to distribute the content to home users for offline viewing. We propose to include other open source CODEC than JPEG2000/MPEG2, which are specifically designed for theatrical performance. Final image size will be further reduced considering the display device resolution where video will be finally played. Key Delivery Message(KDM) system to be altered to suit new devices. This will be a big boost to Content Economy as content owners would be able to distribute the content securely to the wider audience & ensure more revenue.

• Journal of Electrical Engineering and Technology
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• 제9권3호
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• pp.1089-1095
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• 2014

Innumerable microgrids would be operated independently by individual operators in a future smart grid. This kind of decentralized power system requires entirely different operation scheme in the actual power system and electricity market operation. Especially, frequency regulation is very important for successive energy trade in this multi-microgrid circumstance. This paper presents an optimal energy and reserve market participation strategy and operation strategy of energy storage system (ESS) by a microgrid operator (MGO). For definite evaluation of the proposed strategy, we postulate that the MGO should participate in the Power Exchange for Frequency Control (PXFC) market, which was devised by Maria Ilic and her coworkers and is suitable to the decentralized operation circumstances. In particular, optimal reserve capacity of the frequency control market and optimal market participation ratio of ESS between frequency control market and energy market are derived theoretically and evaluated by simulations utilizing Nordic Pool Elspot price data.

• 전기학회논문지
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• 제65권2호
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• pp.264-268
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• 2016

Recently, various energy efficiency optimization activities are ongoing globally by integrating conventional grids with ICT (Information and Communication Technology). In this sense, various smart grid projects, which power suppliers and consumers exchange useful informations bilaterally in real time, have been being carried out. The electric vehicle diffusion program is one of the projects and it has been spotlighted because it could resolve green gas problem, fuel economy and tightening environmental regulations. In this paper, the economics of V2G system which consists of electric vehicles and the charging infrastructure is evaluated comparing electric vehicles for V2G with common electric vehicles. Additional benefits of V2G are analyzed in the viewpoint of load leveling, frequency regulation and operation reserve. To find this benefit, electricity sales is modeled mathematically considering depth of discharge, maximum capacity reduction, etc. Benefit and cost analysis methods with the modeling are proposed to decide whether the introduction of V2G systems. Additionally, the methods will contribute to derive the future production and the unit cost of electric vehicle and battery and to get the technical and economic analysis.

• The Journal of Asian Finance, Economics and Business
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• 제8권5호
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• pp.817-828
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• 2021

This article aims to examine the intention to use Islamic microfinance by women entrepreneurs in Malaysia. Microfinance plays a significant role in developing the modern economy in the world by alleviating poverty, creating employment, and empowering women in society. The framework was built on Innovation and Diffusion Theory and Planned Behaviour Theory. The present study has adopted a quantitative research method, which focused on cross-sectional research design to address this problem. Primary data was collected and processed by using a 5-point Likert scale. For this research, a total of 178 questionnaires were distributed among women owners of micro-enterprises in Malaysia by using area collection sampling. To analyze the data, the SmartPLS 3 software package was used. This study developed seven hypotheses, all which have been supported both directly, indirectly, and mediated. This result will be beneficial in assisting policymakers, academics and future researchers who must consider the supported variables. Thus, the study contributes to developing a unique framework to assist women-owned micro-enterprise to success. It will be beneficial for practitioners to enhance women micro-enterprise success rate as well. Indeed, all of the grounded methods have implications both in theory and their main application for the business in SMEs.

• 한국전자거래학회지
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• 제23권3호
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• pp.173-187
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• 2018

2008년 사토시 나카모토(Satoshi Nakamoto)가 중앙 금융기관 없이 개인과 개인 간의 온라인 지불을 가능하게 하기 위하여 P2P(peer to peer) 네트워크를 이용한 이중지불 문제의 해결을 포함한 '비트코인(Bitcoin)'이라는 개인 간 전자화폐 시스템을 제안한 이후 블록체인은 4차 산업혁명에서 산업혁명 사이클 전주기에 영향을 미치는 범용기술로서 자리를 잡아가고 있다. 본 연구에서는 블록체인이 이러한 범용기술로서의 급격한 확산과 활용이 혁신이론 관점에서 어떠한 혁신성을 가지고 있는지를 분석하였다. 분석결과 블록체인은 '물리적 기술'의 특성뿐만 아니라 인간의 사회적 상호작용을 위한 '사회적 기술'로서의 특성을 가지고 있어 기술혁신과 사회혁신을 동시에 수반하는 혁신성을 가지고 있었다. 블록체인의 다양한 혁신성에 대한 본 연구의 접근은 블록체인의 이해를 높이고 향후 정책적 의사결정에 유용성을 제공할 것으로 기대된다.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.943-952
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• 2021

The Covid-19 pandemic situation has changed all medical priorities. This has put pressure on the World's health sector, which also affects the economy of the whole world. This study aims to study how Islamic work ethics affects the relationship between spiritual leadership and organizational inclusion practices in the health care sector of Pakistan in the COVID-19 situation. This is a mix-method study. Data collected of 158 practicing doctors through survey-based questionnaire and interview was conducted from 30 doctors dealing with direct coronavirus. The organizational inclusion practices variable is used for the first time in a quantitative approach in this study. The reliability and validity of organizational inclusion practices are checked by Adanco, SPSS, and SmartPLS software. For this purpose, data on inclusion practices was also collected from the banking and education sector. Results show that spiritual leadership significantly relates to Islamic work ethics also has a positive connection between spiritual leadership and organizational inclusion practices. Still, Islamic work ethics as a moderator has an insignificant impact on the relationship between spiritual and organizational inclusion practices. Also, from the result, it is verified that the organizational inclusion practices variable is valid and reliable for further studies.

• 대한원격탐사학회지
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• 제37권1호
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• pp.13-22
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• 2021

The ML 5.8 earthquake shocked Gyeongju, Korea, at 11:32:55 UTC on September 12, 2016. One year later, on the afternoon of November 15, 2017, the ML 5.4 earthquake occurred in Pohang, South Korea. The earthquakes injured many residents, damaged buildings, and affected the economy of Gyeongju and Pohang. The damage proxy maps (DPMs) were generated from Sentinel-1 synthetic aperture radar (SAR) imagery by comparing pre- and co-events interferometric coherences to identify anomalous changes that indicate damaged by the earthquakes. DPMs manage to detect coherence loss in residential and commercial areas in both Gyeongju and Pohang earthquakes. We found that our results show a good correlation with the Korea Meteorological Administration (KMA) report with Modified Mercalli Intensity (MMI) scale values of more than VII (seven). The color scale of Sentinel-1 DPMs indicates an increasingly significant change in the area covered by the pixel, delineating collapsed walls and roofs from the official report. The resulting maps can be used to assess the distribution of seismic damage after the Gyeongju and Pohang earthquakes and can also be used as inventory data of damaged buildings to map seismic vulnerability using machine learning in Gyeongju or Pohang.

• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.927-938
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• 2021

Small and Medium Enterprises (SMEs) is one of several activators that drives the economy of Indonesia because SMEs provide jobs, increase Gross Domestic Product (GDP), and assure the delivery of products and services. However, Indonesian SMEs are not very competitive in the industrial world, and one of the causes is the low quality of products that undermine customer satisfaction. There are several factors presumed as influencing customer satisfaction, which among others include product knowledge, service quality, and competitive advantage. The objective of this research is to reveal the contribution of product knowledge and service quality to customer satisfaction with competitive advantage as the mediation variable. This research used a quantitative approach. The causal relationship across variables was examined with Structural Equation Modeling-Partial Least Squares (SEM-PLS). The sample of this research involved 140 respondents. Data was collected through a questionnaire and the items in the questionnaire were processed with a software called SmartPLS version 3.3.2. Results of this research indicate (1) product knowledge and service quality can increase competitive advantage and customer satisfaction in East Java SMEs; (2) competitive advantage can act as a mediator in the effect of service quality on customer satisfaction (3) product knowledge can increase customer satisfaction but the increase is not significant statistically.