• Journal of the Korean Society of Food Science and Nutrition
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• v.38 no.12
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• pp.1656-1663
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• 2009

The antioxidant activities of water extracts from wild vegetables such as Ligularia fischeri (GC), Capsicum annuum L. (GCY), Aster scaber (CNM), Petasites japonicus S. et Z. Max (MYD), Ipomoea batatas L. (Lam) (GGM) were evaluated and compared with water extracts from freeze dried block. The antioxidant properties of water extracts from wild vegetables and their freeze dried block were evaluated using different antioxidant tests; 2.2-diphenyl-1-picryl-hydrazyl (DPPH) radical scavenging, hydroxyl radical scavenging and nitrite scavenging activities. The water extracts from wild vegetables were found to have a higher total phenolic content than water extracts from freeze dried block. Total phenolic contents of water extracts from GC, GCY, CNM, MYD, and GGM were $471.66{\pm}3.52\;{\mu}g/mg,\;141.33{\pm}2.51\;{\mu}g/mg,\;177.33{\pm}2.88\;{\mu}g/mg,\;238.66{\pm}9.50\;{\mu}g/mg\;and\;122.67{\pm}3.51\;{\mu}g/mg$, respectively. At the concentrations of 1000 ppm, water extracts from GC, GCY, CNM, and GGM showed higher activities than water extracts from their freeze dried block on DPPH radical scavenger activity. The activity of water extracts from CNM, GC, GCY, MYD, and GGM were 90.9%, 89.9%, 76.6%, 71.1%, and 57.4%, respectively. When 10000 ppm of GC, GCY, CNM, MYD, and GGM water extracts tested for hydroxyl radical scavenging activity, activities were increased by 38.8%, 33.4%, 35.9%, 34.3%, and 33.8%, respectively and a similar effect was found with water extracts from GCY, CNM, and GGM freeze dried block at 10000 ppm concentration. However, the water extracts from GC and MYD was slightly more effective than freeze dried block extracts. The water extracts from wild vegetables and their freeze dried block had effective DPPH radical scavenger activity and hydroxyl radical scavenging activity at all tested concentrations. Nitrite scavenging activity of GC water extract significantly increased in a dose-dependent manner and the extract had higher nitrite scavenging activity than extracts freeze dried block extracts. We found that freeze dried block maintained antioxidant activities of the wild vegetables.

• Journal of Technology Innovation
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• v.23 no.4
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• pp.245-287
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• 2015

Architectural innovation is being regarded as one having major influence on the rate of performance improvement, even if this type of innovation does not show the highest level of technological discontinuity. Radical innovation firms who made a breakthrough product new to an industry, approach a certain point of time in which the speed of performance improvement very slows down, if architectural efficiency is not improved. At this time, this firm's prior experience in developing inferior, but very creative radical product architecture might work as paradoxical impediments to architectural innovation, the following important event. This study intends to understand the relationship between shifts in market needs and technological problem solving strategy, which exist before. after, and during architectural innovation, based on conceptual framework in which both stage and problem solving perspectives are combined. Korean SME, JAHWA Electronics could succeed in diffusion of vibration motor, by overcoming technological mental model locked in seemingly successful first generation architecture of coin type vibration motor. In-depth single case study including interviews and active participative observations was carried out for building longitudinal understanding of this innovation concept.

• 한국벤처창업학회:학술대회논문집
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• 2022.04a
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• pp.25-30
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• 2022

Despite the importance of partnership for commercialization of innovations in startups, it is not easy for startups to persuade an established firm to collaborate on a completely novel idea. If information transfer about the innovations is too costly, startups may avoid pursuing radically new projects. Our paper examines the impact of policy signals on the novelty of the innovations pursued by startups. In the context of the Orphan Drug Act(ODA), we find that startups develop more radical therapies when policy signals help them to convince potential partners of the value of prospective therapies. While the likelihood of partnership increases, the timing of partnership is delayed in ODA-affected fields.

• Journal of Service Research and Studies
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• v.3 no.2
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• pp.75-89
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• 2013

In the services industry and firms, the successful new service development is very important issue today, But the innovation process for service firms is comprehensively little treated until now. This study was performed to suggest the new service development process model for the firms level in the perspective of the radical service innovation. So, in this paper the new process development model can be made by reviewing the concepts about the radical service innovation and by analyzing the some existing new service development process models. In the suggested service development process model, the three key process such as technology forecast, market analysis, and strategy development were included for front phase activity as the new service development process. Also the four key process for searching phase, and the other three key process for implementation phase were included. And for the application for the service firms' service innovation, the innovation's outcome estimation reference model is included. I hope to be executed the various case research and the improvement and optimization for this suggested process model in the future.

• Journal of Korea Technology Innovation Society
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• v.10 no.3
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• pp.458-485
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• 2007

This study aims to examine the effects of consumption values on digital convergence products buying behavior. Especially, this study examines the nature of consumption values that differentiate incremental innovation products from radical innovation product. We first categorize the convergence products into incremental innovation products and radical innovation products based on the degree of innovation, and then study the differences of consumption values of each product group. The empirical research is conducted on the premise that the consumer's value can play an important role in the process of selecting convergence product types. Although some factors related to function value has been accounted much of, various consumer values have not been studied in the context of convergence product consumption behavior. This research assumes that consumer choice behavior is a function of multiple consumption values such as functional value, social value, emotional value, and epistemic value. The result shows that consumption values of digital convergence products are made up of 4 consumption values-emotional, epistemic, social and functional values. Also, these consumption values affect the purchase intention of consumers. Purchase intention of radical innovation convergence products is affected by emotional value, epistemic value, and functional values. Purchase intention of incremental innovation convergence products is affected only by functional value. Demographic variables such as sex, age and income don't have influence on purchase intention. Our findings suggest that choice behavior of digital convergence product is influenced by several consumption values. Managerially, our result emphasize that convergence products must satisfy the consumption values that consumers are seeking in order to be successful in the market. the theoretical and practical implications of these findings are discussed as well.

• Microbiology and Biotechnology Letters
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• v.41 no.3
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• pp.341-349
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• 2013

In this study, the anti-oxidative and anti-obesity activities of two medicinal herb extracts, Tetrapanax papyriferus (TP) and Siegesbeckia pubescens (SP), were evaluated using DPPH radical scavenging activity assay, lipase enzyme inhibition assay, and the cell culture model system. Both methanol extracts of TP and SP showed DPPH radical scavenging activities dose-dependently, and the $IC_{50}$ of DPPH radical scavenging activities of the two medicinal herbs were 65.23 and 47.79 ${\mu}g/ml$, respectively. Furthermore, both extracts suppressed effectively lipase enzyme activity dose-dependently. Moreover, TP and SP extracts significantly suppressed adipocyte differentiation, lipid accumulation, triglyceride (TG) contents on 3T3-L1 preadipocytes in a dose-dependent manner without cytotoxicity. Their anti-obesity effect was modulated by cytidine-cytidine-adenosine-adenosine-thymidine (CCAAT)/enhancer binding proteins ${\alpha}$ ($C/EBP{\alpha}$), $C/EBP{\beta}$ and peroxisome proliferator-activated receptor ${\gamma}$ ($PPAR{\gamma}$) gene and protein expressions. Furthermore, TP and SP possessed a synergistic effect on anti-obesity activity. The identification of the active compounds that confer the anti-obesity activity of TP and SP might be needed.

• Proceedings of the Technology Innovation Conference
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• 1993.11a
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• pp.119-147
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• 1993

This paper explores the relationships between technological acquisition strategies of small firms and innovation in the Korean Electronics industry. Its thesis is that small firms' technology strategies and their effects on the rate of innovation differ according to the new and traditional technology settings. A primary finding of this study is that in-house R & D and technical linkages with buyers and suppliers have stronger effects on the radical innovation in the new technology setting rather than in the traditional technology setting. The findings of the study provides insight for interpreting inconsistent results of recent research for the importance of external linkages to innovation. They also suggest some implications of small firms' strategies and public policies for accelerating technological innovation.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.19 no.38
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• pp.29-41
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• 1996

This paper asserts that business innovation methodology will enables companies to fit into the change of business environment and improve the productivity and effectiveness. Business innovation can be implemented using total quality management(TQM), benchmarking, business reengineering, CALS et al. Information technology will be useful tools that enables companies to fit into the radical change of environment and offer the added values to customers.

• The Journal of Information Systems
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• v.30 no.4
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• pp.247-275
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• 2021

Purpose This study attempted to predict corporate innovation and business performance using ensemble learning. Design/methodology/approach The ensemble techniques uses weak learning to create robust learning, which combines several weak models to derive improved performance. In this study, XGboost, LightGBM, and Catboost were used among ensemble techniques. It was compared and evaluated with traditional machine learning methods. Findings The summary of the research results is as follows. First, the type of innovation is expanding from technical innovation to non-technical areas. Second, it was confirmed that LightGBM performed best for radical innovation prediction, and XGboost performed best for incremental innovation prediction. Third, Catboost performed best for firm performance prediction. Although there was no significant difference in predictive power between ensemble techniques, we found that comparative analysis was necessary to confirm better prediction performance.

• Knowledge Management Research
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• v.16 no.4
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• pp.1-16
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• 2015

This paper aims to explore the small and medium sized enterprises'(SMEs') technological innovation through an open innovative strategy. Researchers have identified open innovation as external search 'breadth' and 'depth'. Although an open innovation strategy is well known as an effective way for SMEs' innovation, this stream of research examines differences between pursuing breadth of external knowledge and depth of external knowledge for SEMs' innovation. The sample comprises a total of 1106 SMEs included in the Korean Innovation Survey, and logistic regression analysis and odds ratio comparison were used to evaluate the relationship between external knowledge search and innovation outcomes. The results show that both 'breadth' and 'depth' positively affect the SMEs' innovation. When SMEs are simultaneously pursuing external searching for breadth and depth, however, a negative result on innovation outcome followed because of the lack of their internal resources and capacities. Despite these contributions, we have certain limitations that can be regarded as means of future research. Even though breadth and depth are adopted to measure the way of how a firm sources the external knowledge, companies may place the different weight on each source of knowledge. And also, it is difficult to understand how the knowledge gained through external search contributes to a firm's incremental and radical innovation, respectively.