Photocatalytically splitting water into hydrogen upon semiconductors has tremendous potential for alleviating environmental and energy crisis issues. There is increasing attention on improving solar light utilization and engineering photogenerated charge transfer of TiO2 photocatalyst because it has advantages of low cost, non-toxicity, and high chemical stability. Herein, oxygen vacancies and cocatalysts (Cu and MoS2) were simultaneously introduced into TiO2 nanoparticles from protonic titanate by a one-pot solvothermal method. The composition and structure characterization confirmed that the pristine TiO2 nanoparticle was rich in oxygen vacancies. The photocatalytic performances of the composites were evaluated by solar-tohydrogen evolution test. The results revealed that both Cu-TiO2 and MoS2- TiO2 could improve the photocatalytic hydrogen evolution ability. Among them, 0.8% Cu-TiO2 showed the best hydrogen evolution rate of 7245.01 μmol·g−1·h−1, which was 3.57 and 1.34 times of 1.25% MoS2- TiO2 (2726.22 μmol·g−1·h−1) and pristine TiO2 material (2028.46 μmol·g−1·h−1), respectively. These two kinds of composites also had good stability for hydrogen evolution. Combined with the results of photocurrent density and electrochemical impedance spectra, the incorporation of oxygen vacancies and cocatalysts (Cu and MoS2) could not only enhance the light-harvesting of TiO2 but also improve the separation and transfer capabilities of light-induced charge carriers, thus promoting water splitting to hydrogen.

This study was conducted to investigate the growth characteristics of cucumber (Cucumis sativus L. ‘Joeunbaekdadagi’) and tomato (Solanum lycopersicum L. ‘Dotaerang Dia’) seedlings by light intensities and CO2 concentrations in a closed-type plant production system (CPPS). Cucumber and tomato seeds were sown in 50-cell trays and germinated in CPPS at air temperature 25 ± 1°C and relative humidity 50 ± 10% for 4 days. After germination, the CO2 concentrations and light intensity treatment were treated at 500 (ambient), 1,000, and 1,500 μmol·mol-1 and 100, 200, and 300 μmol·m-2·s-1 photosynthetic photon flux density (PPFD), respectively. The leaf area of cucumber showed the highest value in CO2 1,500 μmol·mol-1. However, the leaf area of the tomato had no significant difference in CO2 concentrations and light intensities treatments. In cucumber and tomato both seedlings, the growth and quality such as compactness and leaf area rate were increased with the increase of light intensity, and there were highest in 300 μmol·m-2·s-1. The root surface and number of root tips of cucumber and tomato seedlings were significantly increased with the increase in light intensity. In conclusion, the regulation of the CO2 concentrations and light intensity can control the growth and quality of cucumber and tomato seedlings in CPPS, especially, increasing the light intensity can improve more significantly the growth and quality of seedlings.

Previous research on green product innovation (GPI) has primarily focused on the performance of new product development, neglecting the critical, early fuzzy front-end (FFE) phase. Drawing upon the firm's resource-based view (RBV) and dynamic capabilities perspective, this study explores how co-production affects FFE outcomes (creative idea and product definition proficiency) of GPI and whether joint learning ambidexterity is a mediating mechanism in international buyer-supplier relationships. Additionally, we provide a contingency perspective by considering the moderating role of the innovation ecosystem on the relationship between co-production and joint learning ambidexterity. Finally, this study contributes to a theoretical understanding, analyzing co-production as a predictor, joint learning ambidexterity as a mediator, and innovation ecosystem as a moderator.

기후변화로 인해 대기 중 이산화탄소 농도 (CO2)증가가 톱다리개미 허리노린재(Riptortus calvatus)의 화학통신에 미치는 영향을 알아보기 위해 실내 이산화탄소 농도를 600, 1000, 2000 ppm 수준 처리하여 조사하였다. 두 집합페로몬 성분인 (E)-2-hexenyl (Z)-3-hexanoate와 (E)-2-hexenyl (E)-3-hexanoate의 생산량은 우화 후 10일 된 수컷의 경우 대기 중 CO2가 높아질수록 증가하는 경향을 보인 반면, 우화 후 20일 된 수컷에서는 감소하는 경향이 나타났다. 교미율은 CO2 농도에 따라 큰 차이가 없었으나, 총 산란수는 1,000 ppm 이상 CO2 농도에서 높게 나타났다.

ABSTRACT The growth of the social platform has led to a rapid increase in sustainable value cocreation activities with customers in order to know what a customer wants. In this study, we have studied about co-creation experience in social platform service. Previous prior studies have systematically classify co-creation between customer and enterprise as co-product and value-in-use, Conceptual factors. The co-creation and value-in-use factors theoretically derived from previous researches attempt to investigate the relationship between value co-creation experience and online service quality. We also tried to investigate the relationship between value co-creation experience and online service quality, customer equity, and online word of mouth. To do this, social platform services are divided into open sns and closed sns. Open SNS was targeted to Facebook, Twitter, and Pintrest users. Closed sns were targeted to Instagram, Cyworld, Band, and KakaoTalk users. In this study, it was confirmed that the relationship between online service quality, customer equity, and online word of mouth is significant through value co - creation experience. In the future, companies that design social platforms will be asked to do what they should do to co-create with customers, and provide suggestions for how to operate the platform in order to continuously activate value co-creative experiences.

According to the environmental management literature, firms can realize significant cost advantage relative to competitors and improve their competitive position by implementing certain "Environmental Management Practices"(EMPs) (Hart, 1995; Shrivastava, 1995b; Christmann, 2000). Although EMPs is importance and prevailing presence, little attention has been paid to understand the drivers and outcomes of EMPs in the context of international buyer-supplier relationships. This study attempts to increase the understanding of how isomorphism pressures and organizational cultures influence the EMPs, which in turn enhance supplier’s competitive advantage in the context of international buyer-supplier relationships.

산소 분리를 위한 세라믹 중공사막을 상전이 방적기술을 통해 제조하였다. 초기 BSCF 선구물질은 고상반응법을 이용하여 합성한 상용 분말이며, 고분자 용액에 분산시킨 후 이중관형 노즐을 통해 사출하였다. 사출된 분리막은 상전이 과정을 거친 후 건조시켰으며 중공사막의 한쪽 끝을 밀봉하였다. 한쪽 끝이 막힌 중공사막의 표면에 dip coating 방법으로 LSCF를 코팅하였으며 1100 ℃에서 소결하여 치밀성을 갖는 한쪽 끝이 막힌 LSCF coated BSCF 중공사막을 제조하였다. 분리막의 공급측은 대기 중 공기를 사용하였으며 투과측은 진공상태를 유지하였다. 투과된 기체의 유량 및 산소의 농도를 측정하였으며 장기투과 실험과 EDS 분석을 통해 분리막의 안정성 평가를 진행하였다.

The purpose of this study is to develop transgenic cell line expressing targeted human granulocyte colony stimulating factor (hGCSF) and green fluorescence protein (GFP) genes as well as production of Somatic Cell Nuclear Transfer (SCNT) embryos derived from co-expressed transgenic donor cells. Constructed pPiggy-mWAP-hGCSF-EF1-GFP vector was chemically transfected into bovine fetus cells and then, only GFP expressed cells were selected as donor cells for SCNT. Cleavage and blastocyst rates of parthenogenetic, SCNT embryos using non-TG cell and hGCSF-GFP dual expressed SCNT embryos were examined (cleavage rate: 78.0±2.8 vs. 73.1±3.2 vs. 70.4±4.3%, developmental rate: 27.2 ±3.2 vs. 21.9±3.1 vs. 17.0±2.9%). Result indicated that cleavage and blastocyst rates of TG embryos were significantly lower (P<0.05) than those of parthenogenetic and non-TG embryos, respectively. In this study, we successfully produced hGCSF-GFP dual expressed SCNT embryos and cryopreserved to produce transgenic cattle for bioreactor system purpose. Further process of our research will transfer of transgenic embryos to recipients and production of hGCSF secreting cattle.

Dongdaemun Fashion Town, a representative clothing wholesale and retail market in South Korea, is a traditional market that was formed in the 19th century in the late Chosun Dynasty. Since then, the market system has strengthened and, as of now, Dongdaemun Fashion Town can produce various products in batch production and is characterized by a quick market response (Jung, Choo, & Chung, 2007). Furthermore, all fashion-related functions are available, making Dongdaemun Fashion Town an industrial cluster where all related businesses and services are locally concentrated (Ko, Choo, Lee, Song, & Whang, 2013). These characteristics of Dongdaemun Fashion Town relieve market trade cost and build a unique production system. It is positioned as a central clothing wholesale and retail district with the function of a national wholesale market. This Dongdaemun Fashion Town system creates services that customers demand through cooperation, partnership, or outsourcing between various suppliers and various resources (Nam, Kim, Yim, Lee, & Jo, 2009). Thus, Dongdaemun Fashion Town is a system space composed of subordinate markets with unique taste functions; here, a systematic network between the suppliers is significant. It produces value co-creation through collaboration with suppliers. However, few previous studies have investigated co-value created through co-production or co-innovation from Dongdaemun Fashion Town. Also, the shift from product-centered thinking to the customer-centered thinking implies the need for an accompanying shift to the customer-based strategy. It also refers the necessity of strategy to improve customer equity (Rust, Lemon, & Zeithaml, 2004). Therefore, further study is needed on co-creation research to make cyclical growth of traditional market and customer equity. The structure of this study is as follows. First, the characteristics of the Dongdaemun Fashion Town’s co-production, co-innovation, and value co-creation are investigated and each of the subordinate aspects is investigated. Second, the influence of co-production, co-innovation, and value co-creation on customer equity driver is analyzed. Third, the moderating effects on the types of suppliers’ (wholesale/retail) influence relationship are analyzed. In total, 300 samples by wholesalers and retailers were collected for the final analysis. Data analysis was performed used SPSS 21.0 for exploratory factor analyses, reliability analysis, and descriptive statistics. Based on the results, AMOS 18.0 was used for confirmatory factor analysis and multiple group analysis. The results of this study provide an insight into the influence of Dongdaemun Fashion Town’s co-production, co-innovation, and value co-creation on customer equity by wholesalers and retailers. The study concludes with outlining future directions of research that can be used in the development of marketing strategies.

Co-production is defined as customer participation in production activities that generate a result to be consumed (Etgar, 2008). Previous research has shown the positive effects of co-production, such as satisfaction, perceived control, and perceived quality (Chan, Yim, & Lam, 2010; Golder, Mitra, & Moorman, 2012; Hunt, Oneto, & Varca, 2012). However, knowledge about the potential negative consequences from co-production is scarce. Despite the importance of the role of causal locus in the generation of unsatisfactory results, to date, this subject has not been properly studied. Considering that co-production is increasingly common in contemporary consumption contexts, this paper aims to broaden knowledge about unsatisfactory results from co-production. Based on two experimental studies, we analyze the role of the causal locus of failures on customer regret and disappointment, taking into consideration the self-serving bias. The results show that a consumption situation with an unsatisfactory regret tends to be higher when the consumer takes the blame than when the causal locus is attributed to the company. When the causal locus is uncertain, regret is higher than disappointment and higher than the regret experienced when the company or the service employee is blamed. Because regret is associated with internal causal attribution, these results contradict the self-serving bias literature, which affirms that people are more likely to make external than internal attributions for failures (Mezulis, Abramson, Hyde, & Hankin, 2004; Weiner, 2010). The internal failure attribution converges with the idea that consumer participation in production implies more responsibility over the result (Bitner, Faranda, Hubbert, & Zeithaml, 1997; Prahalad & Ramaswamy, 2004).When the causal locus is attributed to the company or to the service employee, disappointment towards the company tends to be higher than in the other conditions and higher than regret. Study 2 tested whether consumers who co-produce would take responsibility for a failure and blame themselves in situations where the causal locus was undetermined. The results once again contradicted the self-serving bias literature in a scenario with co-production. Consumers who co-produced experienced more regret and less disappointment towards the company, and they blamed themselves more intensely than the consumers who did not co-produce. Therefore, the consumers who co-produce take more responsibility for dissatisfying results and, consequently, regret their actions to a higher degree than those consumers who do not co-produce. These results show that even when co-production fails to generate a satisfying result for the consumer, it may be positive for the company because it provides a context in which both the consumer and the company may be responsible for the failure. When the company is blamed, consumers experience less regret and more disappointment towards the company than when the consumer is the one to blame. But when the consumer is blamed or the causal locus is uncertain, situations that are both possible in a co-production context, then consumers experience more regret and less disappointment towards the company.

Food waste leachate (FWL) is a serious pollutant waste coming from the food waste recycling facilities in Korea. FWL has a high organic matter content and high COD to nitrogen (COD/N) ratio, which can disturb efficient methane production in the anaerobic digestion of FWL. In the present study a microalga, Clorella vulgaris (C.V), was used as co-substrate for the FWL anaerobic digestion in order to supply nutrients, decrease the COD/N ratio and increase its methane yield. Different co-digestion mixtures (COD/N ratios) were studied by using biochemical methane potential test and modified Gompertz equation for kinetic study. Mixed substrate of FWL and C. vulgaris in the co-digestion clearly showed more the biomethane yield than the sole substrates. The maximum methane production, 827.7 mL-CH4/g-VS added, was obtained for COD/N ratio of 24/1, whereas the highest improvement of methane yield was found for COD/N ratio of 15/1.