One-dimensional (1D) piezoelectric nanostructures are attractive candidates for energy generation because of their excellent piezoelectric properties attributed to their high aspect ratios and large surface areas. Vertically grown BaTiO3 nanotube (NT) arrays on conducting substrates are intensively studied because they can be easily synthesized with excellent uniformity and anisotropic orientation. In this study, we demonstrate the synthesis of 1D BaTiO3 NT arrays on a conductive Ti substrate by electrochemical anodization and sequential hydrothermal reactions. Subsequently, we explore the effect of hydrothermal reaction conditions on the piezoelectric energy conversion efficiency of the BaTiO3 NT arrays. Vertically aligned TiO2 NT arrays, which act as the initial template, are converted into BaTiO3 NT arrays using hydrothermal reaction with various concentrations of the Ba source and reaction times. To validate the electrical output performance of the BaTiO3 NT arrays, we measure the electricity generated from each NT array packaged with a conductive metal foil and epoxy under mechanical pushings. The generated output voltage signals from the BaTiO3 NT arrays increase with increasing concentration of the Ba source and reaction time. These results provide a new strategy for fabricating advanced 1D piezoelectric nanostructures by demonstrating the correlation between hydrothermal reaction conditions and piezoelectric output performance.

The increasing competition in recent years made more and more firms regard strategic alliance as an important alternative and solution to respond to fierce competition. As a kind of system arrangement among firms, the concept of strategic alliance was first proposed by Hopland and Nigel in the early 1980s, who defined strategic alliance as the collaboration mode in which two or more firms, aiming at joint-owned both market and resources, formed the kind of cooperation to enhance advantages, share risk or cost, and also mutual flow of production factors via different kinds of contracts or agreement. However, even before this definition, many firms have already begun their alliance strategies practices. As a cooperative form, strategic alliance, no matter its specific types, becomes one key choice for firms to acquire, maintain and enhance their market shares and positions. Shrader (2001) found that collaboration to foreign firms become key methods for newly-founded firms and small firms to enter foreign markets, which can bring these firms with suitable knowledge and market information, making these firms expand even faster with lower costs and market risks. The enhancing pace of globalization and internationalization triggered firms’ attentions to external markets, Archibugi and Iammarino (2002) found that fierce changes in internal market forced firms to expand their market and product scopes, making more and more firms realize product and R&D internationalization by searching, choosing and collaborating with foreign firms. Dong and Glaister (2006) found Chinese firms cared more about market positions, international expansion and technology exchanges, while foreign firms tended to enter to Chinese market and learn how to operate in China via strategic alliances. Although, many scholars brought out managerial practices of firms’ strategic alliances, and had already formed theoretical foundations, researches related to market orientation, especially how alliance firms establish and realize their strategic goals and performance goals under market motivation is still lack of studies. In reality, the mechanism how firms’ alliance intention transformed into their strategic or performance goals is still in the black box. Taken alliance firms as research objectives, this paper tends to explore how firms constructed strategic alliance due to market-orientation realize their strategic or performance goals via choice of patent strategies. We introduced patent strategies to establish the matching model, to analyze how firms market orientation influence choices of patent strategies, and their mutual effects on firms innovative performance, in hope to provide to the future studies and managerial practice how firms can choose the reasonable and effective alliance partners according to their own strategic and performance goals. Based on differentiation of market access and market extension motivation, we pointed out that, in order to realize the transformation from alliance motivation to innovation performance, alliance firms had to choose and determine among a set of practical and operational plans. Patent strategies, as a kind of operational plan, were conducive to transformation from alliance motivation to innovation performance. With the framework of market motivation, patent strategy and firms innovative performance, we put forward the hypotheses on how market motivation affect firms’ choices of patent strategies, and also the joint effects of market motivation and patent strategies on firm innovative performance. We selected alliance firms in IT industry as samples, with data from Cooperative Agreements and Technology Indicators Database, USPTO and R&D Scoreboard released by Department for Business, Innovation & Skills of UK, we empirically tested effects of market motivation on choices of patent strategies, and also effects of market motivation and patent strategies on firms innovative performance. Results showed that: different market positions led to differentiated motivations and patent strategies in their strategic alliances, firms with relatively weak market positions tend to pursue strategic profile of patent defensive and leveraging strategies under market access motivation, while firms with strong positions would like to implement patent proprietary and leveraging strategies in market extension motivation. The implementation of patent defensive and leveraging strategies under market access motivation enhanced innovation efficiency of the firms with weak market positions. Since these firms focused more on market positions and opportunities, their market capitalization tended to improve, but the motivation and utilization of patent strategies had no effect on patent output. Similar to these firms, the ones with stronger market position were inclined to strengthen their market opportunities and improve their market capitalization. Results indicated that because of their stronger market positions, these firms showed lower awareness of innovation efficiency and their emphasis on patent output was not high either, which then led to the fact that both market extension motivation and patent strategies used had no effects on firms innovative performance measured by innovation efficiency or patent output.

This paper is to estimate the economic effect of benefits of the R&D and recreational fishing as well as input-output analysis in the Tae-an Trial Sea Farm Project(TTSFP). We use B/C model to indicate the effects of economic valuation. B/C analyses model consists of Benefit Cost Ratio(BCR), Net Present Value(NPV) and Internal Ration of Return(IRR). Using 5.5% discounting rates and the survey data, the sub-models show economically feasible in the all of analysis and analyzed the results as follows. NPV is 42,147 million won, BCR is 3.29 and IRR is 34.30%. This study attempts to apply input-output(I-O) analysis in connecting the economic effect of TTSFP. I-O model was constructed, focusing on three effects; the production-inducing effect, the value-added-inducing effect and employment-inducing effect. There are positive effects on economic value and job creation in Tae-an and Nation.

본 연구는 기업의 제품혁신 과정에서 기술협력 활동과 전유성의 확보가 제품혁신성과에 어떠한 영향을 미치는지 살펴보았다. 추가적으로 협력활동과 전유성의 상호작용 효과 (전유성의 조절효과)에 대하여 분석하였다. 과학기술연구원에서 조사한 2010년 한국 제조업의 기술혁신조사 자료를 이용한 실증분석 결과 고객과의 협력활동과 계열사와의 협력활동이 제품혁신에 긍정적인 영향을 미치는 것으로 나타났다. 또한, 전유성의 그 자체로 제품혁신에 긍정적인 영향을 줄 뿐만 아니라 고객과의 협력활동이 제품혁신에 주는 긍정적인 영향을 배가시키는, 다시 말해 제품혁신에서 전유성의 중요성이 확인되었다. 이러한 연구 결과를 바탕으로 제품혁신 성과를 높이기 위한 전략적 시사점을 도출하였다. 제품혁신에서는 기술협력활동뿐만 아니라 전유성의 확보가 혁신성과를 결정하는 중요한 요인이기에 기업에서는 기술협력활동의 활성화 및 기술의 전유성 확보에 힘써야 할 것이며 이러한 전유성의 확보를 위한 기술보호 수단의 전략적 활용에 대한 통찰이 필요하다.

풍력발전기의 출력곡선은 풍속과 출력의 관계를 나타내는 것이다. 풍력발전기의 출력은 밀도에 비례하고 풍속의 삼승에 비례하므로 신뢰성 있는 출력곡선을 얻으려면 풍황중 특히 풍속도을 정확히 측정하고 분석하여야 한다. 풍속도는 크기인 풍속과 풍향으로 표현되는 매우 불규칙한 난류 벡터량이다. 풍속도 난류는 출력에 지대한 영향을 미치므로 이에 대한 특성분석이 매우 중요하다. 본 연구에서는 풍속도의 난류를 먼저 난류강도로 나타내어 출력에 대한 영향을 풍속의 함수로 분석하였다. 이어서 풍속도의 난류를 풍속난류와 풍향난류로 나누어 출력에 미치는 영향을 난류강도와 풍속의 함수로 분석하였다. 그 결과 시동풍속 부근의 저속영역에서는 난류강도가 큰 경우가 보다 큰 출력을 생산함을 알게 되었다. 연간발전량 역시 연평균풍속이 시동풍속 부근인 경우에는 난류강도가 큰 경우가 많았으나 풍력발전이 경제성을 갖는 풍속에서는 예상대로 난류강도가 작을수록 증가하였다. 또한 시동풍속 부근의 저풍속 영역에서는 풍속난류가 출력에 큰 영향을 주며, 고풍속 영역에서는 풍향난류가 출력에 큰 영향을 미치는 것을 알 수 있었다.

The effect of research and development (R&D) expenditure on firm output is an interesting topic, but hardly explored in developing countries due to the unavailability of data. This study investigates this topic in the context of Vietnam by utilizing a novel dataset of 343 firms listed on the Vietnam Stock Exchange in the 2010-2018 period. The effect of R&D expenditure is examined under the production function framework. In order to obtain the robustness of the quantitative results, we estimate the production function with two coherent techniques including the OLS and 2-SLS. An instrumental variable regression technique is adopted to avoid the endogeneity problem between R&D expenditure and other variables. In our empirical analysis, we find that R&D expenditure has a positive and significant impact on output growth. The finding is robust in both OLS and 2-SLS frameworks. Besides, the output elasticity to R&D expenditure of our result is much higher than the estimated elasticity of other countries. The results imply that a 1% increase in R&D expenditure in Vietnam will help to expand the output more than a 1% increase in R&D investment in other countries. The findings from our paper provide important implications for firm managers, investors, and policymakers in Vietnam.

The application of software engineering is not common in the development of astronomical observation system. While there were component-wise developments in the past, large-scale comprehensive system developments are more common in these days. In this study, current methodologies of development are reviewed to select a proper one for the development of astronomical observation system and the result of the application is presented. As the subject of this study, a project of operation software development for an astronomical observation system which runs on the ground is selected. And the output management technique based on Component Based Development which is one of the relatively recent methodologies has been applied. Since the nature of the system requires lots of arithmetic algorithms and it has great impact on the overall performance of the entire system, a prototype model is developed to verify major functions and performance. Consequently, it was possible to verify the compliance with the product requirements through the requirement tracing table and also it was possible to keep to the schedule. Besides, it was suggested that a few improvements could be possible based on the experience of the application of conventional output management technique. This study is the first application of the software development methodology in the domestic astronomical observation system area. The process and results of this study would contribute to the investigation for a more appropriate methodology in the area of similar system development.