• Smart Structures and Systems
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• 제12권5호
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• pp.547-577
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• 2013

To suppress vibration and noise of mechanical structures piezoelectric ceramics play an increasing role as effective, simple and light-weighted damping devices as they are suitable for sensing and actuating. Out of the various piezoelectric damping methods this paper compares mode based active control strategies to passive shunt damping for thin plates. Therefore, a new approach for the optimal placement of the piezoelectric sensors/actuators, or more general transducers, is proposed after intense theoretical investigations based on the Kirchhoff kinematical hypotheses of plates; in particular, modal and nilpotent transducers are discussed in detail. Based on the proposed distribution a discrete design for modal transducers is implemented, tested and verified on an experimental setup. For active control the modal sensors clearly identify the eigenmodes, whereas the modal actuators impose distributed eigenstrains in order to reduce the transverse plate vibrations. In contrast to the modal control, passive shunt damping works without requiring additional actuators or auxiliary power and can therefore act as an autonomous system, but it is less effective compensating the flexible vibrations. Exemplarily, an acryl glass plate disturbed by an arbitrary force initialized by a loudspeaker is investigated. Comparing the different methods their specific advantages are highlighted and a significant broadband reduction of the vibrations of up to -20dB is obtained.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2016년도 학술발표회
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• pp.187-187
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• 2016

High intensity of population distribution in deltaic setting especially in Asia tends to have increased and causes coastal flood risk due to lower elevations and significant subsidence. Maximum or peak discharge of flood always causes numerous deaths and huge economic losses. New technology of spatial satellite image has been applied to analyze flood damage. In this research, the relationship of nightlight intensity associated with flood damages has been determined during 1992-2013 with spatial resolution of 30 arc sec ($0.0083^{\circ}$) which is nearly one kilometer at the equator in whole six countries along the Mekong River (i.e., China, Myanmar, Lao PDR, Thailand, Cambodia and Vietnam). ArcGIS Hydrological Flow Length Tool has been used to determine the distance of each pixel areas from the rivers and streams. Statistical analysis results highlight the significant correlation R = 0.47 between nightlight digital number and economic damages per unit area (US$/km2) and R = 0.62 for number of affected people for unit area ($people/km^2$). The areas near by the Mekong River and its tributaries correspond to high flood damage. This spatial analysis result is going to be prestigious key information to the regions and all related stakeholders for decisions and mitigation strategies.

• 한국컴퓨터정보학회논문지
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• 제13권5호
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• pp.273-278
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• 2008

도시범죄 관리에 대한 새로운 전략으로써 사전예방적 범죄 통제전략 중의 하나로 추진하고 있는 것이 환경설계를 통한 범죄예방이다. 이에 본 연구에서는 도시범죄와 관련하여 현실적으로 범죄문제에 대응할 수 있는 범죄예방 전략을 모색하고자 하는데 연구의 목적을 두었다. 이를 위해 광주광역시에서 2004년도에 발생한 도시범죄 중 동구의 주거지역에서 발생한 범죄를 대상으로 범죄분포가 어떻게 이루어지고 있는지를 현지조사를 통하여 분석함으로써 CPTED의 입장에서 범죄예방전략을 모색하고자 하였다.

• 산업융합연구
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• 제1권1호
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• pp.159-169
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• 2003

In the 21st century, a time for smaller companies is fast approaching. A lot of people believe that the small and mid-sized companies will be a main force for industry. However, this concept could only be possible after we find some solutions for the general, labor shortage problem. Specifically, the majority of these challenges stem from improper distribution of labor within each company's divisions. These labor shortages have been influenced by a variety of exogenous (human) variables. The sources of the most serious problems come from the lack of appropriate labor and their fair wages. The work environment is also a contributing factor. These items are considered to be serious challenges to the development of smaller enterprises. The purpose of this study is to explore these difficulties. For solving the labor shortage, enterprises and government should offer employees supportive benefits. Enterprise companies should make an effort to improve their work environments. Companies should also use innovative strategies to raise labor compensation. With this in mind, smaller firms should struggle to retain their employees for an extended period of time and commit to an organizational business strategy. Governments should try to develop a higher recognition of smaller enterprises. They should create human power recruitment, development, and recourse policies as needed. Furthermore, they should manipulate existing policies to support human resource development that aids these companies to be more competitive with larger ones. Additionally, it is necessary to develop new, creative programs to help with the social recognition of smaller enterprises.

• Tuberculosis and Respiratory Diseases
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• 제82권2호
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• pp.94-101
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• 2019

Nontuberculous mycobacteria (NTM) are ubiquitous organisms that are generally found not only in the natural environment but also in the human engineered environment, including water, soil, and dust. These organisms can form biofilms and can be readily aerosolized because they are hydrophobic owing to the presence of the lipid-rich outer membrane. Aerosolization and subsequent inhalation were the major route of NTM lung disease. Water distribution systems and household plumbing are ideal habit for NTM and the main transmission route from natural water to household. NTM have been isolated from drinking water, faucets, pipelines, and water tanks. Studies that used genotyping have shown that NTM isolates from patients are identical to those in the environment, that is, from shower water, showerheads, tap water, and gardening soil. Humans are likely to be exposed to NTM in their homes through simple and daily activities, such as drinking, showering, or gardening. In addition to environmental factors, host factors play an important role in the development of NTM lung disease. The incidence and prevalence of NTM lung disease are increasing worldwide, and this disease is rapidly becoming a major public health problem. NTM lung disease is associated with substantially impaired quality of life, increased morbidity and mortality, and high medical costs. A more comprehensive understanding of the infection source and epidemiology of NTM is essential for the development of new strategies that can prevent and control NTM infection.

• The Journal of Asian Finance, Economics and Business
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• 제8권4호
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• pp.819-826
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• 2021

This study aims to determine the impact of product consumption strategy and financial autonomy on the competitiveness of technology firms in Vietnam. This study employs panel data of 27 technology firms collected from listed financial statements of the business for the period (2010-2019). The study also uses some indicators reflecting the macroeconomic situation of the economy collected from the World Bank. Instead of Exploratory Factor Analysis which has been used before, the study uses the feasible generalized least squares (FGLS) estimation as the main method. The FGLS corrects the variance changes and autocorrelation on the dataset of these Vietnamese technology firms. The results reveal that the strategy of product consumption and financial autonomy positively affect the competitiveness of technology firms. These are also two core factors of the technology industry, which have a strong impact on the increase in the competitiveness of firms. The findings of this study suggest that technology firms do not need to invest in many long-term assets, but mainly in short-term assets in order to quickly respond to the strategies for consuming new technology products of the business. In addition, the increase in Gross Domestic Product per capita also positively affects the increase in the competitiveness of technology firms.

• The Journal of Asian Finance, Economics and Business
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• 제9권2호
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• pp.15-27
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• 2022

The paper addresses the importance of redesigning strategies for resilient and sustainable regional economic development - by applying strategic approaches to free economic zones for the digital economy. The purpose of the paper is to provide a broad comparative perspective on developed versus developing country efforts to use free economic zone programs to enhance various economic and social objectives. First, the paper introduces the chronicle experiences of free economic zone programs in South Korea and mainland China - developed versus developing economies. The main results of the analysis indicate that (1) achieving the goals and objectives of free economic zones is challenging over time; (2) trying to upgrade the technical component, develop knowledge-based and eco-friendly new industries, or value-added to the economy through free economic zone policies is even challenging; and (3) incentives and other program-specific variables are highly context-specific and not structurally correlated with free economic zone performance. In addition, the paper shows that the initial conception of the role of free economic zones has undergone significant change as individual countries have tried to enhance the contributions and avoid damages from incorporating free economic zones into their development strategy respectively, over time.

• The Journal of Asian Finance, Economics and Business
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• 제9권4호
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• pp.163-172
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• 2022

The purpose of the study is to determine the impact of several factors on employees' job commitment in ten FDI manufacturing businesses in Vietnam's Nghi Son Economic Zone during the COVID-19 Pandemic. The researchers used reliability tests, exploratory factor analysis, confirmatory factor analysis, and structural equation modeling to confirm the relationships between factors when analyzing the effect of variables on job commitment in FDI enterprises. Based on a poll of 481 respondents, the test findings showed that 07 parameters have positive effects on job satisfaction. Professional assurance, compensation, fringe benefits, supervisor, promotion, coworkers, and working conditions all have varying levels of impact. Job satisfaction, in particular, has a significant and positive impact on employees' commitment to their jobs. According to research findings, the COVID-19 pandemic has been and continues to be a unique burden for Vietnamese firms in general and FDI manufacturing enterprises in Nghi Son EZ in particular. As a result, businesses must have appropriate HRM strategies to incentivize employees to recover, stabilize, and develop in the new normal, ensuring employee loyalty to the company.

• The Journal of Asian Finance, Economics and Business
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• 제10권2호
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• pp.61-71
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• 2023

The purpose of this study is to examine the relationship between POS, JR, and Innovation, and to explore the role of job psychological empowerment as a mediator in this relationship. A structured questionnaire was distributed to 25 companies in the petrochemical industry. PLS-SEM 4 was used to analyze the data of 100 valid responses. These findings suggest that employee empowerment (EMPOW) fully mediates the relationship between job resourcefulness (JR) and Innovation (INNOV). The total effect of JR on INNOV is also significant, with a beta coefficient of 0.234 and a t-value of 3.375. However, when the mediating influence of EMPOW is taken into account, the effect of JR on INNOV is no longer significant, with a beta coefficient of 0.100 and a t-value of 1.610. This suggests that EMPOW plays a key role in the relationship between JR and INNOV and that JR may not have a direct impact on Innovation. The study informs the development of interventions or strategies for promoting Innovation in organizations by identifying key factors that facilitate or inhibit the innovation process. The study further contributes to the development of new theories or models on the relationship between perceived organizational support, job resourcefulness, psychological empowerment, and Innovation.

• 산업경영시스템학회지
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• 제45권3호
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• pp.163-172
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• 2022

The development of ICT technology has created new channels for product sales and promotion, which not only make information accessible to customers as easy as possible, but also provide consumers with much more absolute and comparative information. Modern consumers are exposed so many shopping channels currently, especially mobile-based channels have grown significantly and have become the center of the market. It is true that mobile shopping has led the growth of overall online shopping with the recent development of mobile devices such as smartphones and related software. The importance of strengthening corporate competitiveness and mobile-based management strategies through on line channels continues to increase. At this point, this study attempted to investigate the influencing factors by focusing on the entire distribution channel and mobile shopping channels. As most of previous studies were focused on Internet shopping malls or specific channels, So the research on mobile channels can be judged to be timely and appropriate. Furthermore, it can be said that mobile shopping channels are now presenting empirical implications. In conclusion, it provides practical implications to examine the management strategy of mobile shopping channels from the perspective of consumer value.