A Study of the Innovation Resistance of Users and Intention to Use toward Smart Learning for Education Business Ventures

Sanghoon Cho,Hongsuk Yang 한국벤처창업학회 2015 벤처창업연구 Vol.10 No.1

본 연구는 최근 교육시장의 벤처기업이나 사내 벤처를 위한 혁신기술로 부상하고 있는 스마트러닝(Smart Learning)의 혁신저항에 대하여 연구하였다. 스마트러닝 학습 방법에 대한 지각된 혁신 특성의 상대적 이점, 복잡성 및 적합성이 혁신저항에 유의한 영향을 미치는지 알아보았다. 이어서 기존 학습법에 대한 태도와 지각된 자기효능이 혁신저항에 유의한 영향을 미치는지 알아보았다. 그리고 이용자의 이러한 혁신저항이 향후 이용에 영향을 미치는지 알아보았고, 인구통계에 따라 조절효과가 나타나는지 살펴보았다. 구조방정식 모형을 사용하여 분석한 결과, 상대적이점만을 제외한 모든 요인이 혁신저항에 영향을 주는 것으로 나타났다. 이를 통해 혁신저항 역시 향후 이용의도에 유의한 영향을 미친다는 결과를 얻을 수 있었다. This study examines innovation resistance to smart learning, an emerging innovative technology for startups and corporate ventures in the education market. The study explores whether the relative advantage, compatibility and complexity of an innovation, attitudes toward existing learning method(s), and perceived self-efficacy significantly affect innovation resistance. Additionally, the effects of such innovation resistance on future use and the moderating effect according to demographic characteristics are examined. The results of the analysis using a structural equation model showed that all the factors considered (except relative advantage) affects innovation resistance, innovation resistance significantly affects intention to use.

The Effect of Unobservable Efforts on Contractual Efficiency

Sungwook Kang,Hongsuk Yang 한국경영과학회 2013 Management Science and Financial Engineering Vol.19 No.2

An interesting puzzle in business practices is that although many researchers emphasize the benefits of a revenue-sharing contract, a wholesale contract has remained to be the most common contractual form. By introducing the concept of unobservable efforts, we examine the contractual efficiency of a wholesale contract and a revenue-sharing contract. The multi-task agency model and experimental design approach are used to analyze the relationship between the contractual efficiency and parameters. A major finding of our study is that a wholesale contract coordinates unobservable efforts, while it fails to coordinate the order quantity decision. Because unobservable efforts have mixed effects on the contractual efficiency, the superiority of contract type depends on parameters. This finding implies that a wholesale contract can be a competitive contract, especially when unobservable efforts are heavily involved. Our conclusion is that the current popularity of a wholesale contract is manager’s rational response to complex supply chain environments rather than irrational behaviors.

해외 직구 및 역직구 수요 증가에 따른 물류 및 유통 기업 대응 방안 수립을 위한 효율성 분석 연구

김창희(Changhee Kim),양홍석(Hongsuk Yang),정재훈(Jaehoon Jung) 한국경영과학회 2017 한국경영과학회지 Vol.42 No.4

Today, E-Commerce is expanding rapidly and is becoming increasingly global. In this research, we analyzed fundamentals and the performance of E-Commerce companies to find ways to optimize operational efficiency for distribution corporations in Korea. The analysis focuses on international markets, including Amazon, Ebay, Williams-Sonomia Inc., Liberty Interactive Corp., Zalando, Home Retail Group, Groupe Casino, Alibaba, JD.com, Vipshop Holdings Ltd., Rakuten, Kakaku.com, and Yahoo-Japan. The research applied bootstrap-DEA analysis, non-parametric test, and Tobit regression on data extracted from 13 E-Commerce companies from 2012 to 2014. This research examines the management and export efficiencies of various companies, thus providing positioning details for Korean companies that specialize in distribution.

A Study of the Innovation Resistance of Users and Intention to Use toward Smart Learning for Education Business Ventures

조상훈,양홍석,Cho, Sanghoon,Yang, Hongsuk The Korean Society of Business Venturing 2015 벤처창업연구 Vol.10 No.1

본 연구는 최근 교육시장의 벤처기업이나 사내 벤처를 위한 혁신기술로 부상하고 있는 스마트러닝(Smart Learning)의 혁신저항에 대하여 연구하였다. 스마트러닝 학습 방법에 대한 지각된 혁신 특성의 상대적 이점, 복잡성 및 적합성이 혁신저항에 유의한 영향을 미치는지 알아보았다. 이어서 기존 학습법에 대한 태도와 지각된 자기효능이 혁신저항에 유의한 영향을 미치는지 알아보았다. 그리고 이용자의 이러한 혁신저항이 향후 이용에 영향을 미치는지 알아보았고, 인구통계에 따라 조절효과가 나타나는지 살펴보았다. 구조방정식 모형을 사용하여 분석한 결과, 상대적 이점만을 제외한 모든 요인이 혁신저항에 영향을 주는 것으로 나타났다. 이를 통해 혁신저항 역시 향후 이용의도에 유의한 영향을 미친다는 결과를 얻을 수 있었다. This study examines innovation resistance to smart learning, an emerging innovative technology for startups and corporate ventures in the education market. The study explores whether the relative advantage, compatibility and complexity of an innovation, attitudes toward existing learning method(s), and perceived self-efficacy significantly affect innovation resistance. Additionally, the effects of such innovation resistance on future use and the moderating effect according to demographic characteristics are examined. The results of the analysis using a structural equation model showed that all the factors considered (except relative advantage) affects innovation resistance, innovation resistance significantly affects intention to use.

선형계획법을 이용한 한국 성인의 최적 식품섭취패턴 설계 (Ⅱ) : 단계적 나트륨 목표섭취량 설정에 따른 최적 식품섭취패턴 조정

아사노가나(Kana Asano),양홍석(Hongsuk Yang),이영미(Youngmi Lee),김미영(Meeyoung Kim),윤지현(Jihyun Yoon) 한국영양학회 2019 Journal of Nutrition and Health Vol.52 No.4

본 연구는 선형계획법을 이용하여 나트륨의 제약조건 변화에 따른 최적 식품섭취패턴 변화를 살펴보고 보다 실현성이 높은 나트륨의 목표섭취량을 구하고, 이를 나트륨의 제약조건으로 최적 식품섭취패턴을 설계하는 것을 목적으로 수행되었다. 주요 결과는 다음과 같다. 나트륨의 제약조건 (2,000 mg)을 100 mg 단위로 증가시키면서 선형계획법을 이용하여 조미료의 최적섭취량을 성 및 연령별 여덟 집단에 대해 산출하였다. 조미료의 최적섭취량이 조미료의 실제섭취량의 25<SUP>th</SUP> 백분위수에 가장 가까운 경우의 나트륨 양은 남성 19 ~ 29세, 30 ~ 49세, 50 ~ 64세, 65세 이상에서 각각 3,600 mg, 4,500 mg, 4,200 mg, 3,400 mg, 여성 19 ~ 29세, 30 ~ 49세, 50 ~ 64세, 65세 이상에서 각각 2,800 mg, 3,100 mg, 3,100 mg, 2,500 mg으로 산출되었다. 이를 나트륨의 제약조건으로 하였을 때 성 및 연령별 여덟 집단의 최적 식품섭취패턴이 선형계획법을 이용하여 수학적으로 설계되었다. 결론적으로 나트륨의 제약조건을 2,000 mg으로부터 500 ~ 2,500 mg 정도 성 및 연령별로 상향 조정하였을 때 실현성이 높은 최적 식품섭취패턴이 설계되었다. 이 최적 식품섭취패턴에서는 여덟 집단 모두 공통적으로 채소류, 여성에서 우유 · 유제품류, 50 ~ 64세를 제외한 여성에서 과일류의 섭취량을 현재보다 더 늘릴 필요가 있는 것으로 나타났다. Purpose: The Dietary Reference Intakes for Koreans (KDRIs) suggest that the goal for the intake of sodium should be less than 2,000 mg, which is thought to be infeasible to achieve when eating the typical Korean diet. This study aimed to obtain the new intake goals for sodium with improved feasibility to achieve, and also to design optimized food intake patterns for Korean adults by performing linear programming. Methods: The data from a one day 24-hour dietary recall of the 2010 ~ 2014 Korea National Health and Nutrition Survey were used to quantify food items that Korean adults usually consumed. These food items were categorized into seven groups and 24 subgroups. The mean intakes and intake distributions of the food groups and the food subgroups were calculated for eight age (19 ~ 29, 30 ~ 49, 50 ~ 64, and over 65 years old) and gender (male and female) groups. A linear programming model was constructed to minimize the difference between the optimized intakes and the mean intakes of the food subgroups while meeting KDRIs for energy and 13 nutrients, and not exceeding the typical quantities of each of the food subgroups consumed by the respective age and gender groups. As an initial solution of the linear programming, the optimized intake of seasonings, including salt, was calculated as 0 g for all the age and gender groups when the sodium constraint was inserted not to exceed 2,000 mg. Therefore, the sodium constraint was progressively increased by 100 mg until the optimized intake of seasoning was obtained as the values closest to the 25<SUP>th</SUP> percentile of the intake distribution of seasonings for the respective age and gender groups. Results: The optimized food intake patterns were mathematically obtained by performing linear programming when the sodium constraint values were 3,600 mg, 4,500 mg, 4,200 mg, 3,400 mg, 2,800 mg, 3,100 mg, 3,100 mg, and 2,500 mg for the eight age and gender groups. Conclusion: The optimized food intake patterns for Korean adults were designed by performing linear programming after increasing the sodium constraint values from 2,000 mg to 2500 ~ 4,500 mg according to the age and gender groups. The resulting patterns suggest that current diets should be modified to increase the intake of vegetables for all the groups, milk/dairy products for the female groups, and fruits for the female groups except for the females aged 50 ~ 64 years.

선형계획법을 이용한 한국 성인의 최적 식품섭취패턴 설계 (Ⅰ)

아사노가나(Asano, Kana),양홍석(Yang, Hongsuk),이영미(Lee, Youngmi),윤지현(Yoon, Jihyun) 한국영양학회 2018 Journal of Nutrition and Health Vol.51 No.1

본 연구는 선형계획법을 이용하여 현재의 식품섭취패턴에서 크게 벗어나지 않으면서 영양섭취기준을 충족하는 한국 성인의 최적 식품섭취패턴을 설계하였고, 주요 결과는 다음과 같다. 식품품목별 실제섭취량과 최적섭취량을 비교하였을 때 실제섭취량보다 최적섭취량이 높게 나타나 영양섭취기준을 충족하기 위해서 현재보다 섭취량을 더 늘릴 필요가 있는 식품품목으로 모든 집단에서 공통적으로 채소류, 50 ~ 64세 남성을 제외한 집단에서 우유 · 유제품류인 것으로 나타났다. 50 ~ 64세를 제외한 여성에서는 채소류, 우유 · 유제품류 이외에도 과일류도 섭취량을 더 높여야 하는 식품품목으로 나타났다. 모든 남성 집단과 19 ~ 29세를 제외한 여성 집단에서 김치의 최적섭취량이 실제 섭취량보다 낮게 나타나 김치는 덜 섭취해야 하는 식품품목인 것으로 파악되었다. 또한 조미료에 대해서는 모든 집단에서 공통적으로 최적섭취량이 0 g으로 산출되었다. 이에 선형계획법을 이용해서 설계한 최적 식품섭취패턴에서 조미료의 최적섭취량이 실생활에서 실현 불가능한 0 g으로 산출되었기 때문에 설계한 최적 식품섭취패턴의 실현성을 높이기 위해서는 나트륨의 목표섭취량을 실제섭취량이 고려된 보다 현실적인 기준으로 재설정할 필요가 있다. Purpose: The aim of this study was to design optimized food intake patterns that meet the nutritional recommendations with minimal changes from the current food intake patterns among Korean adults using linear programming. Methods: Data of a one day 24-hour dietary recall from the 2010 ~ 2014 Korea National Health and Nutrition Survey were used to quantify the food items that Korean adults usually consumed. These food items were categorized into seven groups and 24 subgroups. The mean intakes and intake distributions of the food groups and the food subgroups were calculated for eight age (19 ~ 29, 30 ~ 49, 50 ~ 64, and over 65 years old) and gender (male and female) groups. A linear programming model was constructed to minimize the difference between the optimized and mean intakes of the food subgroups while meeting the Dietary Reference Intakes for Koreans (KDRIs) for energy and 13 nutrients, and not exceeding the typical quantities of each food subgroup consumed by the respective age and gender groups. Results: The optimized food intake patterns, which were a set of quantities of 24 food subgroups, were obtained mathematically for eight age and gender groups. Overall, major modifications of current diet were required to increase the intake of vegetables and milk/dairy products and decrease the Kimchi intake. The optimized intake of seasonings, including salt, was calculated to be 0 g for all the age and gender groups. Conclusion: The optimized food intake patterns designed using linear programming in this study lack feasibility because they suggest a seasoning consumption of 0 g. Modification of intake goal for sodium is needed to obtain optimized food intake patterns with improved feasibility.

서비스업의 혁신 목적으로서 지속가능 혁신이 혁신 성과에 미치는 영향에 관한 연구

신재호(Jaeho Shin),양홍석(Hongsuk Yang),김창희(Changhee Kim) 한국SCM학회 2018 한국SCM학회지 Vol.18 No.2

Though sustainability is a concept encompasses not only environmental issues but also others such as social issues, most studies on sustainable innovation has focused on environmental facets. While sustainability-related objectives exist as motivations for firms to perform innovation, moreover, the effect of them on innovation performance is still not fully answered. In this paper, we focused on sustainability as innovation objectives other than environmental issues, and figured out the effect of them on innovation performance. We set the limit to service industry only and performed regression analysis. The result showed that the safety improvement has positive effect on both radical and incremental product innovation, while material and energy reduction turned out to be negatively related to incremental product innovation. We also found that high level of safety improvement tend to increase the probability of firms adopt process innovation, while material and energy reduction tend to lower the probability.

혁신 제약과 정부지원제도가 물류업의 혁신 성과에 미치는 영향에 관한 연구

신재호(Jaeho Shin),양홍석(Hongsuk Yang) 한국생산관리학회 2021 韓國生産管理學會誌 Vol.32 No.4

제 4차 산업혁명 시대의 새로운 기술은 물류산업에 기술적 혁신과 새로운 서비스의 도입을 이끌 것으로 예측되어, 국내 물류업의 혁신을 이루기 위한 국가적 차원의 대응이 논의되고 있다. 그러나 물류산업의 혁신 제약이 혁신 성과에 미치는 영향에 대한 논의가 이루어지지 않아, 물류업의 혁신을 촉진하기 위한 방안 마련에 대한 근거가 부족한 실정이다. 이에 본 연구에서는 물류산업의 혁신 제약이 혁신 성과에 미치는 영향을 파악하고, 더불어 혁신 제약과 혁신 성과의 관계에 있어 정부지원제도가 미치는 영향을 분석하였다. 2016년 한국기업혁신조사 데이터를 활용하였으며, 요인분석을 바탕으로 혁신 제약을 자본적 제약과 역량적 제약으로 구분하였다. 정부지원제도로는 조세지원, 자금지원, 금융지원, 인력지원, 기술지원, 인증지원, 구매지원의 총 7가지를 고려하였다. 연구결과 물류기업이 자본적 제약에 직면할수록 높은 혁신 성과를 달성하는 경향이 있음이 검증되었으나, 역량적 제약의 직접적인 영향은 검증되지 않았다. 또한 조세지원, 자금지원, 금융지원, 인력지원, 구매지원과 같은 정부지원제도는 역량적 제약이 혁신 성과에 미치는 영향을 긍정적으로 조절함을 밝혔으나, 기술지원과 인증지원의 조절효과는 검증되지 않았다. 기업의 역량적 제약의 수준에 따른 정부지원제도가 갖는 직접적 영향과 조절적 영향을 바탕으로 혁신 성과와의 관계를 논의하였다. 연구 결과를 바탕으로 물류산업의 혁신을 촉진하기 위한 정부지원제도의 수립 및 활용과 더불어 물류 기업의 혁신 전략에 대해 제언하였다. During the Fourth Industrial Revolution, new technologies will lead to technological innovation. There are studies on how the domestic logistics industry will see the introduction of new services and receive national attention on achieving innovation. However, given the lack of discussion on the impact of innovation constraints on innovation performance in the logistics industry, there is insufficient evidence on the methods for promoting innovation in the industry. This study identified the impact of innovation constraints on innovation performance in the logistics industry and analyzed the impact of government support systems on the relationship between innovation constraints and performance. The results showed that logistics companies tend to achieve higher innovation performance when facing funding-related constraints, while the direct impact of capability-related constraints was not established. The government support systems – tax, fund, finance, manpower, and purchasing support – positively moderate the impact of capability-related constraints on innovation performance; however, the moderating effect of technical and certification support was not established. Based on the results, we suggest ways to establish and utilize government support systems and propose innovation strategies that can help logistics firms promote innovation.

An Optimal Composition of Market Samples for New Product Test Marketing

Inseong Song(송인성),Hongsuk Yang(양홍석) 한국경영학회 2019 經營學硏究 Vol.48 No.6

The development of new products is crucial for a business to maintain its competitive advantages, but the introduction of new products is risky. To avoid huge losses from launching unsuccessful products, marketers try to test the market potential of a new product in the early stages of the development process. It is not uncommon for a multi-store retail chain to test the potential profitability of a new product in a few selected stores before it introduces the product to the entire chain. Since test marketing would involve huge costs, marketers need to find a better way to select markets for accurate testing while keeping the number of test markets as low as possible. This study proposes a model to develop an optimal sampling network with which one can identify the optimal combination of markets for test marketing. Based on a simple demand model, an approach to find an optimal sampling network that would lead to an efficient estimate of the market size of a new product is developed. It is also demonstrated that the samples based on the proposed procedure produces a much more accurate estimate of the market size for a new product than randomly chosen samples do.

An Indirect Decoupled Adaptive Fuzzy Sliding-Mode Control through width adaptation

Dowoo Kim,Haiwon Yang,Hongsuk Han 제어로봇시스템학회 2002 제어로봇시스템학회 국제학술대회 논문집 Vol.2002 No.10