In this study, the fate and removal of 15 pharmaceuticals (including stimulants, non-steroidal anti-inflammatory drugs, antibiotics, etc.) in unit processes of a sewage treatment plant (STP) were investigated. Mass loads of pharmaceuticals were 2,598 g/d in the influent, 2,745 g/d in the primary effluent, 143 g/d in the secondary effluent, and 134 g/d in the effluent. The mass loads were reduced by 95% in the biological treatment process, but total phosphorous treatment did not show a significant effect on the removal of most pharmaceuticals. Also, mass balance analysis was performed to evaluate removal characteristics of pharmaceuticals in the biological treatment process. Acetaminophen, caffeine, acetylsalicylic acid, cefradine, and naproxen were efficiently removed in the biological treatment process mainly due to biodegradation. Removal efficiencies of gemfibrozil, ofloxacin, and ciprofloxacin were not high, but their removal was related to sorption onto sludge. This study provides useful information on understanding removal characteristics of pharmaceuticals in unit processes in the STP.

The government announced that it would ask the contractors not only the supplier but also the contractors to take the same responsibilities if they did not observe industrial accident safety measures from 2019. The semiconductor manufacturing process belongs to the representative disaster industry group in which the facility is directly located inside a closed space called clean room. According to previous studies, the semiconductor industry group used checklists for safety management of their suppliers. This study has developed a model for assessing suppliers by constructing a quantitative checklist item through the risk assessment methodology, laws and regulations. The evaluation model of the supplier set up through this study becomes the safety management standard in the semiconductor industry .Furthermore, it is applied to the partner companies in the operation of ISO 14001, 45001, I would like to apply it as a measure of performance management for CSR (Corporate Social Responsibility).

This study explores how the shared reflections of two university instructors influenced their approaches and perspectives of English language teaching. The primary source of data was derived from the two teachers’ e-mail mediated, collaborative reflective journals and two dialogical interviews served as a secondary data source. A qualitative, narrative inquiry approach was employed to gather data in a direct and in-depth way. The data were selectively coded to investigate the teacher’s reported beliefs, behaviors, and interactions as well as how they relate to the process of professional development. The findings indicate that the process of sharing and reflecting upon their pedagogical philosophy and strategies supported their ongoing efforts to develop professionally. Moreover, this study addresses the notion that more attention should be paid towards improving reflective teaching among teachers as a means of enhancing professional development.

부산의 해운대 해수욕장은 양빈에도 불구하고 지속적인 침식이 일어나고 있으며, 지구온난화로 인한 파랑 에너지 증가와 간헐적인 태풍이 그 원인으로 알려져 있다. 2016년 10월 태풍 차바는 부산을 내습하였는데, 태풍이 해빈침식에 있어 어느 정도 영향을 미치는지 알아보기 위해 태풍 전과 후 VRS-GPS 시스템을 사용해 해빈 측량과 표층 시료를 채취하여 입도분석을 실시하였으며, 침식 후 복원이 어느 정도 되는지 주기적으로 해운대 해빈 지형을 측량하였다. 조사결과, 태풍 내습 직후 해운대 해빈은 평균 약 1.4m 침식되어 낮아졌고, 평균 고조위선은 약 12 m 후퇴했으며, 이에 따라 해빈 경사는 3.8o에서 1.7o로 완만해졌다. 퇴적물 평균입도는 평균 1.6Φ에서 2개월 후 1.2Φ로 조립해졌으며, 분급은 상대적으로 좋아졌다. 태풍 내습 2개월 만에 평균 고조위선은 약 85% 정도 회복되고 해빈 단면은 대부분 복원 되었다. 이러한 결과는 해운대 해빈 침식에 있어 태풍의 영향은 크지 않으며, 다른 해빈과 비교할 때 회복기간이 매우 짧다는 것을 시사한다.

There have long been debated whether Jeju king cherry in Korea and Punus x yedoensis (Yoshino cherry) in Japan are the same or not and its originality. Recent genomic approach among P. yedoensis and closed related varieties from Korea, Japan and USA confirms that P. yedoensis is F1 hybrid. The results also show that there are two types of Jeju king cherry in Mt. Halla, Jeju, Korea and one type is clearly different and the other type is the same grouping to Yoshino cherry in Japan and USA and the maternal texa of the two types in Jeju is the same of P. pendula. The search of paternal texa of the same type and further molecular genetic analysis and classification among newly found hundreds of Jeju King Trees in natural habitats of Mt. Halla including a 265 year-old tree along with previous findings would reveal the hypothesis that two independent F1 hybrid of P. yedoensis are evolved in Mt. Halla where is the only natural birth place of P. yedoensis in the world. Furthermore, policy agenda of king cherry tree eco-exploration among six countries including two divided Korea proposed. In terms of bio-diplomacy, it was amazing fact that Jeju King Cherry trees were sent USA under Japanese colony in 1912. In 1943, USA Congressman John Rankin of Mississippi confirms that they were Korean Cherry Trees. The first four of these trees were presented to the American University in 1943 by the Korean Women’s Relief Society of Honolulu according to notice of AU’s School authority. As Jeju NAtional University students and teachers confirmed the fact in April 2018, they suggest Jeju King Cherry Trees Eco- Exploration between the two universities at university level, hoping to extend a warming program of planting Jeju King Cherry trees at the Dalma tourism complex in Wonsan city of North Korea in April of 2020.

Water quality improvement processes for stagnant area consist mainly of technologies applying vegetation and artificial water circulation, and these existing technologies have some limits to handle pollution loads effectively. To improve the purification efficiency, eco-friendly technologies should be developed that can reinforce self-purification functions. In this study, a multi-functional floating island combined with physical · chemical · biological functions (① flotation and oxidization using microbubbles, ② vegetation purification and ③ bio-filtration with improved adsorption capacity) has been developed and basic experiments were performed to determine the optimal combination conditions for each unit process. It has been shown that it is desirable to operate the microbubble unit process under conditions greater than 3.5 kgf/cm2. In vegetation purification unit process, Yellow Iris (Iris pseudacorus) was suggested to be suitable considering water quality, landscape improvement and maintenance. When granular red-mud was applied to the bio-filtration unit process, it was found that T-P removal efficiency was good and its value was also stable for various linear velocity conditions. The appropriate thickness of filter media was suggested between 30 and 45 cm. In this study, the optimal design and operating parameters of the multi-functional floating island have been presented based on the results of the basic experiments of each unit process.

In this study, volatile organic compounds (VOCs) emitted from printing industries were analyzed, and an inorganic adsorbent, γ-alumina, was selected for the effective control of the VOC emissions. Printing processes commonly require inks, thinners, and cleaners, and they were mixed organic solvents containing aromatic compounds, ketones, and alcohols. Therefore, toluene, methyl ethyl ketone (MEK), and isopropyl alcohol (IPA) were selected as model compounds for this study. The adsorptive properties using γ-alumina were determined for the model compounds. Both batch isotherm and continuous flow column tests demonstrated that the adsorption capacity of MEK and IPA was 3~4 times higher than that of toluene. The column test performed at an inlet toluene concentration of 100 ppm showed that an 80% breakthrough for toluene was observed after 3 hours, but both MEK and IPA were continuously adsorbed during the same time period. A numerical model simulated that the γ-alumina could remove toluene at a loading rate of 0.4 mg/min only for a 4-hour period, which might be too short of a duration for real applications. Consequently, lifetime enhancement for γ-alumina must be implemented, and ozone oxidation and regeneration would be feasible options.

본 연구에서는 하수처리유출수의 유기물 성상을 제어하기 위해 서로 다른 흡착제를 적용하여 역삼투막의 막오염 경향성을 관찰하였다. 실험실 규모에서 역삼투막 운전결과, 다중벽탄소나노튜브 (5%), 팽창흑연 (21%), 하수처리유출수(25%), 활성탄 (26%) 순서로 초기대비 투과수량이 감소하였다. 형성된 막오염 물질의 FEEM 분석결과, 활성탄의 경우 팽창흑연, 다중벽탄소나노튜브, 하수처리 유출수에 상대적으로 높은 미생물유래물질에 의한 막오염이 존재하였다. 더 나아가, 분자량 분석 결과를 통해 고분자 미생물유래물질(>15K Da)의 영향이 큰 것을 확인하였다. 결과적으로, 하수재이용공정에서 고분자 미생물유래물질이 역삼투막 효율저하의 주요한 역할을 하며, 이를 저감시키기 위한 방안마련이 필요하다고 판단되었다.

This paper discusses ways to understand and cope with the issues of holism, generalizability, and representativity in qualitative research. More specifically, the article argues that critical sociolinguistic ethnography can serve as a useful methodological tool to uncover complicated processes and consequences of linguistic practice in social life in an increasingly globalized world. Drawing on Heller’s (2011) framework of critical sociolinguistic ethnography, the analysis underscores how critical sociolinguistics focuses on the analysis of the processes by which social actors access and mobilize valuable linguistic resources across time and space. The paper illustrates the situated research processes of doing critical sociolinguistic ethnography through two research projects on South Korean transnational English learners conducted by the authors. The article concludes with a discussion of how critical sociolinguistic ethnography may contribute to broadening research agenda in sociolinguistics in the era of globalization.

Digitalization has generated massive amounts of available data sources (Wedel and Kannan 2016). Consequently, firms aim to exploit this additional value – particularly in decision-making (Barton and Court 2012). However, potential misleading consequences of Big Data for companies have not been examined yet – neither in practice nor in research. Addressing this research gap, the current investigation first uncovers questionable managerial outcomes and behaviours generated by Big Data. The results of a first paper-and-pencil experiment show that executives tend to rely on Big Data even in a domain where this may be misleading (i.e., innovation) (Martin and Golsby-Smith 2017). Interestingly, this relationship is found to be particularly evident for top-managers. A second online study does not only replicate the findings in a correlational setting but beyond sheds light on its mechanism. We show that Big Data activates top-executives’ promotion focus leading them to become more risk seeking and egocentric. In study 3, we replicate these findings through experimentation and moderation underlining its robustness. Finally, we detect a lever to avoid that Big Data leads to less defensive decision behaviour (study 4).

Public transportation companies often classify customers into only two classes, i.e. first and second class. This segmentation largely ignores travelers’ needs and may leave heterogeneity within classes. Using a discrete choice experiment, this work investigates if the introduction of dedicated sections based on travelers’ characteristics can provide them additional value.

With the advent of globalization and the accompanying rapid changes in economic environments, firms have gradually transformed their mode of operations from one based on the traditional good-dominant logic to one based on service-dominant logic. The emergence of service-dominant logic has resulted in the development of value co-creation, which refers to the process through which firms, suppliers, and customers all become involved in the discovery and creation of product value and create added value through even and reasonable distribution. Drawing upon the SDT theory, the current study has the following three research objectives. First, the current study investigated the influence of transformational leadership on employee-based value co-creation and the impact of transformational leadership on employees’ intrinsic motivation to further enhance their value co-creation. Second, this study sought to understand the mediating mechanisms between transformational leadership and employee-based value co-creation; financial and non-financial variables were used as the mediators to explore whether the financial incentive affects employees’ intrinsic motivational process with regard to the transformational leadership that leads to employees’ intrinsic motivation. Third, positive psychological capital was used as a mediator to examine whether it mediates the relationship between the financial perspective and value co-creation. Fourth, self-concordance was also adopted to examine whether self-concordance mediates the relationship between the financial perspective and value co-creation. We collected 513 survey responses from 81 teams in firms from diverse industries in Taiwan. The present study makes the following contributions. First, previous research related to leadership behavior primarily focused on the influences of leadership behaviors on employee attitudes and behaviors. Only a few studies addressed the impact of leadership on value co-creation. Drawing on the self-determination theory to build our research framework, our study contributes to the field by investigating how transformational leadership stimulates employee-based value co-creation. Second, the present study investigated the psychological mechanisms involved in the motivational process in the context of the ways in which transformational leadership facilitates changes in employee behavior, particularly for employees’ intrinsic motivation. Third, the present study proved that financial and non-financial incentives respectively mediated the relationship between transformational leadership and positive psychological capital. Additionally, both financial and non-financial incentives mediated the relationship between transformational leadership and self-concordance. These results suggest that both financial and non-financial incentives could be effective ways for transformational leaders to intrinsically motivate their employees. These findings are valuable contributions to the leadership studies field. Fourth, the present study adopted hierarchical linear modeling (HLM) to conduct a multi-level analysis of the relationship between transformational leadership and value co-creation.

Recently, among the water treatment technologies, the forward osmosis (FO) system has been received much attention due to the advantages in energy consumption. However, the practical application of the FO system has been limited because of the remaining obstacles such as the absence of both adequate draw solute and efficient membrane. In this study, polymers having lower critical solution temperature (LCST) and upper critical solution temperature (UCST), one of the temperature-responsive characteristics, are used as the draw solutes. These materials could be recovered easily by heating them to above their LCST and to below their UCST, respectively. Finally, we believe that our results will provide insight into the synthesis of temperature-responsive draw solutes for water treatment applications.

Pressure-retarded osmosis (PRO) is one of the promising candidates to reduce the reliance on fossil fuels by harnessing energy from the salinity gradient between high-saline and low-saline water. Based on recent advances in the membrane technologies, PRO has re-emerged as a potentially viable energy option. However, several challenges still remain before PRO can reach the commercial stage. Within this context, the objective of this research was to assess the techno-economic feasibility of PRO and PRO-hybrid processes. In particular, model-based performance analysis were conducted for the PRO-hybrid systems. In addition, the influence of colloidal fouling on the performance of PRO process was further investigated. It is expected that this research would help comprehensively understand the PRO-hybrid processes thereby activate further development.