• Journal of Korea Trade
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• v.25 no.3
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• pp.1-20
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• 2021

Purpose - The purpose of this paper is to examine the welfare effects of standards harmonization between technologically asymmetric countries, and to determine optimal harmonization strategies for a country with mid-level technological advancement. Design/methodology - Following Salop's circular city model (Salop, 1979), this study constructs a simple, horizontally-differentiated oligopoly model in which three firms and three countries exist. Each country adopts different compatibility standards and each firm incurs conversion costs for foreign market access due to differences in standards. The conversion costs are related to technology; standards harmonization removes these costs between participating countries. The paper considers three cases: i) no harmonization; ii) harmonization with the more technologically-advanced country and iii) harmonization with the less technologically-advanced country. Findings - The paper first considers a scenario in which all three firms occupy some share of the market in each country. It shows that standards harmonization with both the technologically moreor less-advanced country always increases consumer surplus and social welfare. In addition, the producer surplus will increase if the harmonization partner has a higher technology level, whereas it may decrease if the partner has a lower technology level. It also shows that if most domestic export goods are in sectors with conversion costs above a certain level, harmonizing standards with a technologically more-advanced country should be prioritized. Such strategies, moreover, should be emphasized when there exists a large technology gap among countries. Lastly, the paper considers another scenario, in which harmonization leads to the foreclosure of the non-member firm from the member countries' markets. It shows that harmonization improves the social welfare of a mid-level technology country regardless of its partner's technology. It also shows that the country should prioritize harmonization with the technologically less-advanced country. Originality/value - Though some of the existing studies consider the welfare effects of harmonization, their main assumption is that firms have the same conversion technology. Since complying with standards often requires substantial technological advancement and technical expertise, harmonization of compatibility standards between countries with gaps in technological ability carries different implications. This paper investigates the welfare effects of this harmonization and determines an optimal harmonization strategy while considering technological asymmetry among countries in standards compliance.

• Asian-Australasian Journal of Animal Sciences
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• v.33 no.9
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• pp.1444-1454
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• 2020

Objective: Cold stress induces oxidative damage and impairs energy status of broilers. N-acetylcysteine (NAC) exhibits antioxidant properties and modulates energy metabolism of animals. This study was conducted to investigate the effects of NAC on energy status and antioxidant capacity of heart and liver in the cold-stressed broilers. Methods: The experiment consisted of 4 treatments in a 2×2 factorial arrangement with two diets (basal diet or plus 0.1% NAC) and two ambient temperatures (thermoneutral [conventional ambient temperature] or cold stress [10℃±1℃ during days 15 to 42]). Results: No ascites were seen in cold-stressed broilers. NAC did not attenuate the impaired growth performance of stressed birds. However, NAC decreased plasma asparagine but increased aspartate levels in cold-stressed birds (p<0.05). NAC reduced hepatic adenosine triphosphate (ATP) but elevated adenosine diphosphate contents in unstressed birds (p<0.05). The hepatic ratio of adenosine monophosphate (AMP) to ATP was increased in birds fed NAC (p<0.05). NAC decreased plasma malondialdehyde (MDA) level and cardiac total superoxide dismutase (T-SOD) activity in unstressed birds, but increased hepatic activities of T-SOD, catalase and glutathione peroxidase in stressed birds (p<0.05). NAC down-regulated hepatic AMP-activated protein kinase but up-regulated cardiac heme-oxigenase mRNA expression in stressed birds, and decreased expression of hepatic peroxisome proliferator-activated receptor coactivator-1α as well as hypoxia-inducible factor-1α in liver and heart of birds. Conclusion: Dietary NAC did not affect energy status but enhanced the hepatic antioxidant capacity by increasing the activities of antioxidant enzymes in cold-stressed broilers.

• Journal of Korea Technology Innovation Society
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• v.21 no.1
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• pp.331-353
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• 2018

Using data from 2008 and 2010 Korean Innovation Survey, this study estimates the impacts of non-technological innovation activities on the performance of technological innovation. The study estimates the effects of the two types of innovation, organizational innovation and marketing innovation. The estimation results suggest that both organizational and marketing innovations are closely related to the success of innovative products. In particular, non-technological innovation has significant positive impacts on the share of sales with market novelties. Among individual practices in organizational innovation, only the introduction of new business practices contributes positively to the sales of innovative products. In case of marketing innovation, new marketing methods in product design, product promotion and pricing increase the share of sales from new products.

• Korea Trade Review
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• v.45 no.5
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• pp.261-277
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• 2020

The purpose of this study is to analyze whether SMEs' technological capabilities and international marketing capabilities affect the export performance of the SMEs and to empirically test the moderating effect of the CEO's risk propensity on such a relationship. We obtained data from 190 SMEs located in Gwangju and Jeonnam Province in Korea through survey and performed a regression analysis for hypothesis testing based on these data. As a result of the analysis, it was found that SMEs' technological capabilities and international marketing capabilities had a significantly positive (+) effect on export performance, respectively. Also, the CEO's risk propensity was found to reinforce the relationship between technical competence and export performance, and the relationship between marketing capabilities and export performance was also found to be strengthened in the positive (+) direction. These results suggest that it is necessary for SMEs to continuously develop technological capabilities and international marketing capabilities to achieve successful export performance in overseas markets. Also, the CEO's propensity to promote these relationships may be important.

• Advances in aircraft and spacecraft science
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• v.10 no.3
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• pp.281-302
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• 2023

In this paper, bending analysis of exponentially varying functionally graded (FG) plate is presented using trigonometric shear deformation theory (TSDT) considering both transverse shear and normal deformation effects. The in-plane displacement field consists of sinusoidal functions in thickness direction to include transverse shear strains and transverse displacement include the effect of transverse normal strain using the cosine function in thickness coordinate. The governing equations and boundary conditions of the theory are derived using the virtual work principle. System of governing equations, for simply supported conditions, Navier's solution technique is used to obtain results. Plate material properties vary across thickness direction according to exponential distribution law. In the current theory, transverse shear stresses are distributed accurately through the plate thickness, hence obviates the need for a shear correction factor. TSDT results are compared with those from other theories to ensure the accuracy and effectiveness of the present theory. The current theory is in excellent agreement with the semi-analytical theory.

• Journal of the Korean Society of Propulsion Engineers
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• v.4 no.3
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• pp.45-54
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• 2000

Ignition transient is a. very rapid process lasting only in the order of 100 milliseconds and therefore it is difficult to measure all relevant ballistic properties. Numerical simulation is thus useful to quantify some of these hard to measure flow and ballistic properties. One-dimensional model was employed to study the effects of aging using simplified aging scenarios for both N-H sustainer and booster motors. Also the effects of newly designed igniter on the ignition of N-H sustainer was simulated. Radiation effects could be significant in terms of energy flux increase to the propellant surface and the energy exchange between the combustion gas itself. One dimension implementation of radiation showed significant effects for rear-mounted igniter. Implementation of radiation effects into 2-D axi-symmetric numerical model was completed and its effects on the N-H sustainer were examined. To have a reliable prediction of computer model on ignition transient, accurate chemical property data on the propellant and igniter gas are required. It was found that such property data on aged N-H motors are not available. Chemical aging model can be used to predict to some degree of accuracy effects of aging on chemical and mechanical properties. Such a model was developed, albeit 2-dimensional, to study migration of moisture through a representative solid rocket motor configuration.

• Asia-Pacific Journal of Business
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• v.11 no.4
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• pp.177-188
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• 2020

Purpose - The purpose of this study was to examine the effect of government R&D programs on firm innovation activities. Design/methodology/approach - This study analyzed survey data on innovation survey in Korea. To investigate our research hypothesis we used ordered logit regression analysis. Findings - This study unveils different effects of diverse government R&D programs on firm innovation activities. Most of government programs-R&D tax incentives, information/training, and marketing supports-have positive effects on management innovation activities and negative effects of the usage of procurement programs on management innovation efforts. Some government programs-R&D tax incentives, R&D grants, information/training-have positive effects on technological innovation activities. Research implications or Originality - This paper investigates the effects of diverse government R&D programs on technological and management innovation activities. We examine simultaneous effects of multiple government R&D programs rather than effects of independent R&D programs. This result can contribute to develop more effective government R&D programs to support firm innovation activities.

• Journal of Korea Technology Innovation Society
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• v.17 no.4
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• pp.629-650
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• 2014

This paper aims at exploring the comparative impact of social networks and firm's absorptive capacity on the process of technological alliance such as technological alliance partner selection, governance structure and performance. Firms not only need to develop internal absorptive capacity but also need to cooperate with outside innovating entities. Increasing networks with other firms and enhancing firm's internal absorptive capacity become more and more important to enter into new market, increase network effects and develop firm's core capacities. In the view of firm's motivation for technological alliance such as expanding social networks and enhancing absorptive capacity, we develop hypotheses and tested comparative impact of those two constructs using 215 survey data of Korean venture companies. The results showed that absorptive capacity showed more impacts on the technological partner selection criteria than social networks. No impact was found between social network and alliance performance. Only absorptive capacity showed positive impact on the technological alliance success. Both constructs showed no impact on the choice of governance structure. In the conclusion section, we discussed the findings and implications of this study and directions for future studies.

• Journal of Digital Convergence
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• v.9 no.5
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• pp.175-191
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• 2011

To improve cooperative performance, organizations are increasingly developing its technology capabilities to maintain performance and satisfaction with its collative partners. The data for 143 collaboration experiences from domestic manufacturing firms were used to test hierarchical regression model with trust moderating between technology capabilities and collaborative performance and satisfaction. The result suggests that technological human resources, technological organization, technological leadership are the most important factors to affect positively collaborative performance and satisfaction, and there are interaction effects of trust on technological assets and technological organization with collaborative performance and satisfaction.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.8 no.3
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• pp.1-16
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• 2013

The purpose of study is to promote the development of medium size enterprises(MSE) by analyzing the causal relationship between technology acquisition strategy and firms' performance. In this study, we use the number of intellectual property, sales growth rates, and return on sales as proxy variables of technological and financial performances. This study includes internal R&D investment, cooperative R&D with academy, foreign technologies transferred, and their interaction effects as the independent variables. The results of study are as follows. Frist, R&D Investment, Foreign Technologies Transferred and their interaction effects are positively influence on technological performance. Second, Cooperative R&D with academy and the interaction effects of R&D Investment and Cooperative R&D with academy are negative influence on technological performance. On the other hand, all of the main independent variables and the interaction effects have non-significant relationships with financial performances. These results imply that technological innovation efforts of MSEs do not effectively increase their financial performances. Furthermore, technological supports of government and academy on MSEs' innovation do not effectively increase their innovation outputs. Finally, this study discussed its theoretical and practical implications and the limitations of the study.