본 연구는 졸업식, 입학식 시즌에 생화 꽃다발 상품에 관해 소비자 인식과 구입 특성을 알아보고자 10세 이상의 내국인 남, 여 242명을 대상으로 설문조사를 진행하였다. 졸업, 입학식 시즌의 꽃다발 상품 구입 이유에 관한 설문 결과, 특별한 날이기 때문에 가족, 친구들과 좋은 시간을 보내기 위한 능동적인 구입 형태가 가장 높은 것으로 나타났다. 소비자들은 유치원 및 대학교 졸업, 입학식에 비해 초, 중, 고 졸업, 입학식 에 꽃다발 구매 경험이 더 많았으며, 주로 행사 당일 1~2시간 전에 노점에서 상품을 구입하는 것을 선호하였다. 소비자들이 선호하는 꽃다발 가격과 크기는 1~5만원 사이의 중간 (21~50cm) 크기를 선호하였다. 소비자가 생각하는 꽃다발 가격 결정 요인으로는 꽃다발의 품질이 가장 중요한 요소로 생각하였고, 선호하는 절화의 특성은 전제적인 디자인이 가장 중요한 것으로 나타났다. 연령별 소비자가 선호하는 절화 특성으로는 10대는 30대 이상 연령에 비해 선명하고 화려한 색의 절화를 선호하며, 30대가 20대보다 화형이 큰 절화를 선호 하였다. 꽃다발 상품을 구입하지 않는 이유는 가격에 대한 신뢰와 절화수명에 대한 만족도가 떨어지기 때문인 것으로 나타났다. 꽃다발 대체상품으로 보존화, 건조화, 조화 등을 구입하는 비율은 낮았으며, 대체상품을 구입하는 일부 소비자들은 생화보다 오래 볼 수 있으며 관리가 쉽기 때문에 구매하는 경향이 있었다. 본 연구 결과, 변화하는 소비자들의 절화상품 인식 제고를 위해 절화 가격 및 구매 후 관리에 대한 교육과 홍보가 더욱 필요할 것으로 판단된다.

Osteoarthritis is a disorder characterized by a loss of cartilage as common aging-associated disease in humans and animals. However, unlike human clinical trials, investigational studies in pet animals are constrained by a lack of interest and funds. In addition, pet owners would often prefer the lowest cost method to treat arthritis of pet animals. Here, we report the outstanding and inexpensive way to prepare chondrocytes for cartilage repair using rabbit adipose derived mesenchymal stem cells (MSCs). This study focused on the development and enhancement of pre-chondrogenic condensation under external electric fields even without additional growth factors. We found that highly compact structures were formed within 3 days in micromass cultures of rabbit MSCs under electrical stimulation (ES), showing increased COL2A1 gene expression compared with their control 3D micromass cultures and 2D monolayer cultures. We further found that ES enhanced the production of proteoglycan, a highly produced extracellular matrix component in chondrocytes. Collectively, these results provide the commercial potential of electrical stimulation driving chondrogenesis of mesenchymal stem cells for repair of cartilage, which is a budget-friendly regimen.

PURPOSES : The objective of this study is to figure out the trend and characteristics of fine particulate matter (PM2.5) and nitrogen oxide (NOx) concentration in underpass sections. The effect of traffic and meteorological condition on PM2.5 / NOx concentration was analyzed using field monitoring data. METHODS : Based on the literature review, PM2.5 and NOx concentration data were monitored using DustTrak II aerosol monitoring system and Serinus 40 oxides of nitrogen analyzer, respectively. Meteorological and traffic information was collected using automatic weather system and traffic volume counter, respectively. RESULTS : PM2.5 has a positive and negative correlation with relative humidity and wind speed, respectively. Meanwhile, NOx was found to have no correlation with meteorological conditions. The NO/NO2 ratio tends to change with traffic volume, indicating higher correlation between NO and traffic volume; the observed NO2 is mostly a secondary material produced by NO oxidation. CONCLUSIONS : Our study provides clear characteristics of NOx and PM2.5 and correlations with meteorological and traffic information in the underpass sections. It is found from this study that the increase in wind speed causes reduction in the concentration of PM2.5 owing to the diffusion and dispersion phenomena. On the other hand, the meteorological conditions were found to barely have correlations with NOx concentrations in this study. The traffic volume could significantly affect the NOx concentration and NO / NO2 ratio, which is directly correlated to the emissions from vehicles.

This article investigates from a critical discourse studies perspective the news media representations of inbound international students in Korean higher education. In light of the ideological workings of discourse and the media's social impact on the public consciousness, the current study examines the structures and detailed meanings of the media portrayals of international students as regards the three dimensions of the textual feature, discursive practice, and social practice. The findings suggest that the media representations of international students are racialized according to stratified power relations in the context of Korean higher education, and that the racialization and stratification is undergirded by neoliberal capitalist ideology of internationalization, ambivalent diversity discourse of Others, and benevolent care discourse of the minoritized. A range of discursive othering strategies are deployed in the news texts to render more newsworthy the reported issues and incidents concerning international students. The article concludes and argues that more fluid approaches to diversity should be developed to account for the complexity and multiplicity of transnational subjectivities.

Short-chain fatty acids (SCFAs) such as acetate, propionate, and butyrate are secondary metabolites produced by anaerobic fermentation of dietary fibers in the intestine. Intestinal SCFAs exert various beneficial effects on intestinal homeostasis, including energy metabolism, autophagy, cell proliferation, immune reaction, and inflammation, whereas contradictory roles of SCFAs in the oral cavity have been reported. Herein, we found that low and high concentrations of SCFAs induce differential regulation of intracellular Ca2+ mobilization and expression of pro-inflammatory cytokines, such as interleukin (IL)-6 and IL-8, respectively, in gingival fibroblast cells. Additionally, cell viability was found to be differentially regulated in response to low and high concentrations of SCFAs. These findings demonstrate that the physiological functions of SCFAs in various cellular responses are more likely dependent on their local concentration.

Particulate matter (PM) has recently been considered one of the most harmful air pollutants to public health. Plants have been known to degrade and deposit particle pollutants with epicuticular wax (EW), and this capacity can be influenced by environmental conditions including relative humidity (RH). The present study examined the effects of RH on EW generation and PM deposition upon leaf surfaces within Asplenium nidus ‘Avis’. The plants were treated in growth chambers with two levels of RH (low: 30% - 40% and high: 80% - 90%) for a period of four weeks, and subsequently exposed to a 30 μg･m-3 concentration of TiO2 particles as a PM resource for 72 hours. The EW ultrastructure on the leaf surface was observed as the thin films type, which was not morphologically changed in the condition of low or high RH treatment. For four weeks of RH treatment, the fresh weight and leaf area per plant were not significant between low and high RH treatment, while dry weight was significantly higher in the high RH condition. We also found that greater amounts of EW per fresh weight, dry weight and leaf area were generated in high RH. However, the total amounts of PM deposition (surface PM + in-wax PM) of the plants were higher within the low RH treatment with a higher proportion of surface PM. In contrast the proportion of in-wax PM was 15% higher within the high RH. These results suggest that EW generation is affected by air humidity and that proportion of PM deposition in the EW layer were influenced by the amount of total wax load.

The University will contribute, through its high quality of education, training and research, to the containment, reduction and management of the problems confronting humanity in the transition to sustainable way of life utilizing the latest technologies of distance learning. Through international collaboration and leadership, it will generate, mobilize and share knowledge, experience and skills throughout the world so as to promote equitable and sustainable progress and to preserve and enhance the natural world on which humanity depends. As merit of the location of center in Northeastern Asia and North and South countries, Jeju Island has a remarkable natural beauty matching with unique environmental culture tradition, and a wide range of expertise, connections and capabilities in regard to global commerce, finance and transportation, and to the management of watersheds and biodiversity as a newly established international free city, all of which are relevant to world environment of sustainable development.

Cancer is the second leading cause of death worldwide and currently there are many approaches developing towards cancer treatment. Cancer treatments like chemotherapy and radiation therapy are often painful and have adverse effects. The mechanism of apoptosis is a complex process and it involves different pathways in its mechanism of action. Apoptosis can be caused by signals within the cell such as stress, or by extrinsic signals such as ligands binding to cell surface death receptors. The programmed cell death plays a important role in the several physiological and pathological processes. It plays important role in homeostasis. Flavonoids have gained importance as anticancer agents promoting cytotoxicity and apoptosis in cancer cells. Flavonoids are present in many medicinal plants which are a kind of ubiquitous natural products and essential active ingredients. They have strong biological activities with high efficiency and low toxicity, possessing good preventive and cure effects on different tumor forms. Flavonoids such as Scutellarein, Pectolinarigenin and Naringin have reported to possess significant anti-cancer effects on different cancer cell lines till date. In this review, we provide a summary about the anti-cancer effect of the three flavonoids and its mechanisms of action that can be used in future for understanding their potent anti-tumor properties.

Recently, a study of prognosis and health management (PHM) was conducted to diagnose failure and predict the life of air craft engine parts using sensor data. PHM is a framework that provides individualized solutions for managing system health. This study predicted the remaining useful life (RUL) of aeroengine using degradation data collected by sensors provided by the IEEE 2008 PHM Conference Challenge. There are 218 engine sensor data that has initial wear and production deviations. It was difficult to determine the characteristics of the engine parts since the system and domain-specific information was not provided. Each engine has a different cycle, making it difficult to use time series models. Therefore, this analysis was performed using machine learning algorithms rather than statistical time series models. The machine learning algorithms used were a random forest, gradient boost tree analysis and XG boost. A sliding window was applied to develop RUL predictions. We compared model performance before and after applying the sliding window, and proposed a data preprocessing method to develop RUL predictions. The model was evaluated by R-square scores and root mean squares error (RMSE). It was shown that the XG boost model of the random split method using the sliding window preprocessing approach has the best predictive performance.

The development of drugs from natural plant sources is at growing interest due to the limitations of chemical drugs in terms of side effects and cost-effective factors of natural medicines. Among the various components contained in natural plant materials, flavonoids are of increasing interest because of their extended biological benefits. Flavonoids are classified into various types according to their structure and possess different activities depending on the structure. In this study, the flavonoids contained in Artemisia, native to Korea were examined and reviewed. HPLC chromatograms of three Artemisia species (Artemisia annua L., Artemisia iwayomogi and Artemisia argyi H.) were examined from published sources and their component analysis by MS data were summarized. The various flavonoids of Artemisia were classified into 12 types according to the main structure, and 10 flavonoids based on various activities were examined. The 10 flavonoids were identified as quercetin, kaempferol, rhamnetin, diosmetin, luteolin, methoxyflavone, catechin, apigenin, malvidin and genkwanin with extensive reported studies till date. The ten flavonoids examined have been reported to be effective in preventing and treating various diseases and exhibit activities such as anti-cancer, anti-inflammatory, antioxidant, antiviral, anti-obesity, anti-diabetic and anti-Alzheimer. The collective results from the reported studies suggest that the three types of Korean native Artemisia, contains various flavonoids with beneficial activities and may have therapeutic effects against diseases.

본 논문은 최신 기술의 변화와 전시환경의 급변에 대응하기 위한 바람직한 게임전시회의 발전방향에 대해 전시 개최지 결정 주요 이론과 게이미피케이션 전략방안을 제시하였다. 게이미피케이션은 문제해결의 방편으로 게임요소와 게임씽킹을 도입하여 플레이어들을 적극 참여시키는 개념으로, 플레이어 경험(PX)을 제공할 수 있다. 게임전시장 공간연출에 게이미피케이션 응용하여 기획하는 것이 중요하며, 나아가 전시 부대시설과 주변 인프라 시설들까지도 면밀하게 고려해야 한다. 전시개최지에 대한 이론과 선행연구를 종합해보면, 공항으로부터의 접근성, 전시/회의장 시설, 호텔의 객실, 지역이미지, 지리적 위치, 기후, 지역의 유용성, 관광적 특성, 여가 활동성, 교통, 편의, 시설 등은 공통적으로 중요한 요인들임을 알 수 있었다. 각국의 주요 게임전시회의 특징과 인프라의 비교분석을 바탕으로 기존의 게임전시회의 한계를 극복할 차별화된 전시경험 제공과 재방문률을 높일 방안으로 게임전시회 발전을 위한 특성화 전략 전시운영플랫폼 게이미피케이션 전략 및 전시공간의 게이미피케이션 전략 등을 제시하였다.

HPT research studies and practices have been largely conducted in the corporate setting, leaving education as a neglected context despite its strong emphasis on performance in teaching, learning, and school management. In this study, we examine the application of the HPT standards and their effects on Korean teachers’ performance goal achievement for students. With HPT standards, we also investigate the interaction effect of teacher tenure on the relationship among HPT standards and goal achievement. The Hayes Process Model is adopted to examine the second-stage moderated mediation model. The findings support that the principle standards positively mediate the effect of the process standards on the teachers’ goal achievement, and teacher tenure moderates the HPT standards’ effects on goal achievement. The practical and theoretical implications of the results are discussed, as well as limitations and future research suggestions

본 연구에서는 산학 연구로 제작된 게임 에디터를 (Game Editor, MakersLab)을 활용하여 실제 게임을 제작하는 학습을 통해 소프트웨어 교육에서의 학습 플랫폼의 중요도와 이에 따른 학습자들의 프로그래밍, 게임의 플레이 및 제작에 대한 인식 변화를 연구하고자 한다. 게임 플레이에는 익숙하지만 프로그래밍과 게임제작에는 경험이 없는 학습자들을 대상으로 게임 에디터를 학습 플렛폼으로 활용하여 프로그래밍 교육 및 게임제작 관련 수업을 진행 후, 학습자들을 대상으로 인터뷰 및 설문조사를 실시하였다. 학습자들은 대부분 항목에서 '만족한다'는 의견이 지배적이었고, 게임이 제작되어지는 과정에 대해 체험한 것에 대해 흥미로웠다는 의견을 주었다. 하지만, 게임 제작을 처음 경험하는 학습자들에게 게임 에디터 플랫폼은 복잡한 인터페이스 및 기능으로 인해 조작의 어려움을 호소하기도 하였다. 게임 플레이 후, 직접 게임을 기획과 제작을 수행하고, 타 학습자와 서로의 게임에 대해 논의하는 과정 등은 어렵다고만 생각되는 소프트웨어 교육의 동기 부여와 흥미 유발을 위한 좋은 학습 재료로 활용될 수 있음을 본 연구에서는 확인 하였다.

This study examined the effects of freshwater discharge by artificial dikes from the Kanwol and Bunam lakes on the dynamics in the Chunsu Bay, Yellow Sea, Korea, during the summer season based on three-dimensional numerical modeling experiments. Model performances were evaluated in terms of skill scores for tidal elevation, velocity, temperature, and salinity and these scores mostly exceeded 90 %. The variability in residual currents before and after the freshwater discharge was examined. The large amount of lake water discharge through artificial dikes may result in a dramatically changed density field in the Chunsu Bay, leading to an estuarine circulation system. The density-driven current formed as a result of the freshwater inflow through the artificial dikes (Kanwol/Bunam) caused a partial change in the tidal circulation and a change in the scale and location of paired residual eddies. The stratification formed by strengthened static stability following the freshwater discharge led to a dramatic increase in the Richardson number and lasted for a few weeks. The strong stratification suppressed the vertical flux and inhibited surface aerated water mixing with bottom water. This phenomenon would have direct and indirect impacts on the marine environment such as hypoxia/anoxia formation at the bottom.

The design and fabrication of catalysts with low-cost and high electrocatalytic activity for the oxygen evolution reaction (OER) have remained challenging because of the sluggish kinetics of this reaction. The key to the pursuit of efficient electrocatalysts is to design them with high surface area and more active sites. In this work, we have successfully synthesized a highly stable and active NiCo2S4 nanowire array on a Ni-foam substrate (NiCo2S4 NW/NF) via a two-step hydrothermal synthesis approach. This NiCo2S4 NW/NF exhibits overpotential as low as 275 mV, delivering a current density of 20 mA cm-2 (versus reversible hydrogen electrode) with a low Tafel slope of 89 mV dec-1 and superior long-term stability for 20 h in 1M KOH electrolyte. The outstanding performance is ascribed to the inherent activity of the binder-free deposited, vertically aligned nanowire structure, which provides a large number of electrochemically active surface sites, accelerating electron transfer, and simultaneously enhancing the diffusion of electrolyte.

The purpose of this study is to evaluate the application of a web-based cost management competency enhancement program (Web-CMCEP) on nursing students. Medical services are limited and essential for maintenance of human basic life. In order to improve the quality of human life, cost management competency that enable efficient allocation of medical resources are essential. This study adopts a randomized controlled pre/post repeated measure design. The sample comprised 39 nursing students in the web-group and 35 in the textbook-group. Experimental group and control group learned respectively with Web- CMCEP and textbook for 4 weeks. The research variables were measured at 4 times: pre, post, after 4 weeks of intervention, and after 8 weeks of intervention. Data were analyzed using χ2 -test, t-test, paired t-test, repeated measures ANOVA, Friedman test, and Wilcoxon signed rank test. Significant differences were found in cost management knowledge. The web-group showed higher cost management knowledge than the text-group. At different measuring points, the Web-CMCEP led to significant increases in the following: cost management knowledge, cost management attitude, cost management behavior, cost management self-efficacy, and entrepreneurship. Based on the findings, we suggested utilizing the Web-CMCEP as a prototype in developing education programs to improve nursing students’ cost management competency and to support nursing start-ups.

This study was conducted for the purpose of discovering deficiencies within education- related assistance projects of private organizations that provide educational programs for developing countries. Based on the dynamic graph and educational performance of the educational ODA of 11 private institution, the adequacy of the educational projects was analyzed in terms of the following four factors: ‘Improvement of educational environment and expansion of educational opportunities’, ‘Educational system competency’, ‘Competency of education recipients’ and ‘Community formation and social reform’. The analysis found that two institutions were conducting programs corresponding to 3 out of the 4 factors while the remaining nine were conducting programs to achieve two factors. That is, the 11 institutions were appropriately carrying out educational ODA projects. To further invigorate ODA, however, it was found that it will be necessary to reinforce ‘social reform’ through ‘educational system competency’ or ‘community formation.’ This study is meaningful in that as it used a methodology that had never been used before, and analyzed the educational ODA of private institutions.