Removal of Heavy Metal Ions from Wastewater by Polyacrylonitrile based Fibers: A Review

오현영,이재훈,라즈쿠마파텔 한국막학회 2019 멤브레인 Vol.29 No.3

Environmental pollution caused by the presence of heavy metal ion from growing industrialization or from leaching is increasing area of concern. There are several area of water purifications but among them adsorption on the functionalized polymer fibers is efficient and cost-effective method. Polyacrylonitrile (PAN) is exciting polymer due to the presence of excessive functional group which can be easily transformed for metal ion adsorption. PAN can be easily electrospun to prepare nanofiber that have higher surface area leading to better metal ion removal. Composite PAN fiber is yet another type of polymer covered in this review for waste water treatment.

신재생 집단에너지 활용 해외보급 현황 및 사례

오현영 한국에너지학회 2017 한국에너지공학회 학술발표회 Vol.2017 No.9

한국인 영어 학습자의 통사적 섬에 대한 수용성 연구

오현영 한국언어과학회 2016 언어과학 Vol.23 No.3

온라인 수업 평가에 미치는 중요 요인 분석 -일본어 교과 수업을 중심으로 -

오현영 한국일본어교육학회 2023 日本語敎育 Vol.- No.103

본 연구는 일본어 회화와 작문 수업을 중심으로 온라인 수업 평가에 미치는 중요 요인과 교과별로 중요시되는 요인을 비교 분석하였다. 그 결과 평가에 미치는 중요 요인으로는 요인1 상호작용, 요인2 기기조작, 요인3 학습효율, 요인4 수업편이성 요인이 도출되었다. 다음으로 교과별로 각 요인에 대한 평균치와 차이를 보기위해 t검정을 실시하였다. 그 결과 유의차가 보인 요인1 상호작용은 회화수업에서 더 중요시되는 것을 알 수 있고, 요인4 수업의 편이성 요인은 작문 수업에서 더 중요시되는 결과였다. 이상의 결과로부터 교과에 상관없이 온라인 수업 평가에 상호작용, 기기조작, 학습효율, 수업편이성이 평가에 미치는 큰 요인으로 생각되며 온라인 수업 개선을 위해서는 위의 4가지 항목에 대해 좀 더 다양한 질문지를 작성해야 할 것이다. 또한 교과별로 평가에 미치는 요인이 다르다는 점에서 수업 평가에도 교과에 따라 상이한 질문지를 제시하거나 질문지 항목의 내용을 교과에 맞게 작성하는 것이 온라인 수업의 개선으로 이어질 것이다.

탄소중립을 위한 新석유대체연료의 개발·보급 현황과 정책 시사점: 지속가능한 항공연료(SAF)를 중심으로

오현영 에너지경제연구원 2021 에너지경제연구원 수시연구보고서 Vol.- No.-

「んです」の使用実態と特徴-日本語母語話者と韓国人日本語学習者の会話を中心に-

오현영 동북아시아문화학회 2023 동북아 문화연구 Vol.1 No.74

In this study, analyzed the tendency and characteristics of the use of ‘ndesu’ for the first face-to-face conversation between Japanese native speakers and Korean Japanese learners. The results of the analysis of the utterance of “ndesu” were divided into KF and JF, and the analysis of KM and JM was divided into male and female. The characteristics of the actual conversation were also described. The main results are summarized as follows. First, looking at the tendency of native Japanese speakers, both female native Japanese speakers and male native Japanese speakers showed a tendency to use “description”, “true questionnaire”, and “questionnaire”. Next, women and men, who were Korean learners of Japanese, used the most frequently after “explanation,” “true questioning,” followed by “conviction” and “teaching.” Both native Japanese speakers and Korean learners of Japanese had something in common with each other in terms of “explanation” and “truth and authenticity questions.” However, most Korean learners of Japanese were followed by “pushing” and “teaching” followed by “surprise” and “confirmation” among native speakers of Japanese. Next, looking at the difference between men and women, it was found that both native Japanese speakers and Korean learners had similar usage trends, but women used them more frequently. Finally, describe the characteristics that are not found in previous studies from actual conversation examples.As a characteristic of this, there were several expressions that strongly expressed disapproval in the “noda” of “pressing carefully.” If you continue to use the word “ndesu” in “ndesu” when you disagree with the other person, you may make an unpleasant impression on the other person may have an unpleasant impression. In addition, “teaching,” which was often used by Korean learners of Japanese and native speakers of Japanese, seemed to teach the other person's questions in detail. In particular, the words of “teaching” seemed to teach each other about each other's culture and things they didn't know.

Radio-protective effect of sulfated polysaccharide purified from Ecklonia cava against small intestinal stem cells of γ-ray irradiated mice

오현영,빙소진,김아름,조진희,지영흔 충북대학교 동물의학연구소 2013 Journal of Biomedical and Translational Research Vol.14 No.4

Our previous research on sulfated polysaccharide purified from Ecklonia cava, a brown alga found in Jeju island, Korea, showed that sulfated polysaccharides modulate the apoptotic threshold of intestinal cells, thereby preventing intestinal damage caused by ionizing radiation. In this study, we investigated the ability of sulfated polysaccharide to augment restoration of small intestinal stem cells from γ-ray-induced damage. In our results, sulfated polysaccharide treatment increased the numbers of Ki-67-positive cells as well as inducible nitric oxide synthase (iNOS)-expressing cells in the small intestine compared with those of irradiated only mice. Meanwhile, exposure to irradiation increased the number of paneth cells, which are frequently associated with intestinal inflammation, whereas sulfated polysaccharide treatment reduced the number of paneth cells in the small intestinal crypt. Conclusively, our data suggest that reduction of iNOS-expressing cells and paneth cells in sulfated polysaccharide-treated mice contributes to the inhibition of radiation-induced intestinal inflammation.

정신치료와 신경생물학적 연구결과의 관계

오현영,박용천,Oh, Hyun-Young,Park, Yong-Chon 대한생물정신의학회 2012 생물정신의학 Vol.19 No.1

The mechanism of psychotherapy is explained by the recent developments in neuroscience and neuroimaging. The purpose of this study is to understand the nature of psychotherapy and to discuss the future of psychotherapy improvement with the help of advances of the neurobiological findings in psychotherapy. For this study, we investigated a wide range of materials. We searched for various researches on psychotherapy, brain, and neurobiology. In addition to the conventional psychodynamic psychotherapy, we investigated research findings on cognitive behavioral therapy, interpersonal psychotherapy and eye movement desensitization and reprocessing (EMDR). Moreover, based on the actual experiences of treating patients, we speculated the neurobiological mechanisms of the process and results of psychotherapy. With the development of neuroscience, we are now able to understand the personal consciousness, unconsciousness and developmental process. Also subdividing the disease is made possible. Personalized treatment has become available, and we are able to predict the prognosis of patients. Our memories are composed by implicit memory and explicit memory. By psychotherapy, we can consciously remember explicit memory, and it becomes easier to explore implicit memory through free association. Through psychotherapy, we will also be able to learn the effect of acquired environment and experience. Psychotherapy is able to correct human behaviors by modifying the memories. Through the regulation of emotions, it becomes possible to modify the memories and correct the behaviors. In this process, doctor-patient relationship is the main factor which cause positive treatment effects. Furthermore imagination therapy or unconscious, non-verbal stimuli could bring about positive treatment effects. Now psychotherapy could be explained and studied by neuroscientific researches. In this sense, we could provide the direction of future advances in neuroscience by the neurobiological understanding of psychotherapy.

EU 냉난방전략의 집단에너지 활용 방안

오현영 한국에너지학회 2017 한국에너지공학회 학술발표회 Vol.2017 No.4

금속 산화물을 기반으로 한 이산화탄소 포집과 저장에 대한 최근 기술

오현영,라즈쿠마 파텔 한국막학회 2020 멤브레인 Vol.30 No.2

이산화탄소 포집 및 저장기술(CCS)은 인류발생적 요인에 의한 이산화탄소 배출 증가와 그로 인한 기후변화를 완화시킬 수 있는 기술 중 하나이다. 그 중, 매체 순환식 연소(chemical looping combustion, CLC)와 칼슘루핑(calcium looping) 기술은 현재 아민 스크러빙(amine scrubbing)을 대체할 수 있는 유망한 기술로 주목받고 있다. 두 방법 모두 금속 산화물을 이용한 연속적인 순환 사이클 반응에 의한 것이다. 전체적인 이산화탄소 포집 및 저장 성능의 향상을 위해서는 사이클을 거듭 하며 발생하는 소결(sintering)로 인한 안정성 저하 문제를 해결하고 금속 산화물의 구조 또한 최적화해야 한다. 금속 산화물 표면에 얇은 박막을 형성하는 것은 소결로 인한 손상을 막을 수 있는 방법이다. 이러한 박막 제조 기술로 잘 알려진 기술에는 화학기상증착법(chemical vapor deposition)과 원자층증착기술(atomic layer deposition)이 있다. 본 총설에서는 CVD, ALD 기술을 비롯하여 효과적인 반응 안정성 향상을 위한 안정제 첨가 방법, 금속 산화물 구조 개선에 대한 다양한 최근 기술들을 다루었다. CO2 capture and storage (CCS) is one of the promising technologies that can mitigate ever-growing emission of anthropogenic carbon dioxide and resultant climate change. Among them, chemical looping combustion (CLC) and calcium looping (CaL) are getting increasing attention recently as the prospective alternatives to the existing amine scrubbing. Both methods use metal oxides in the process and consist of cyclic reactions. Yet, due to their cyclic nature, they both need to resolve sintering-induced cyclic stability deterioration. Moreover, the structure of the metal oxides needs to be optimized to enhance the overall performance of CO2 capture and storage. Deposition of thin film coating on the metal oxide is another way to get rid of wear and tear during the sintering process. Chemical vapor deposition or atomic layer deposition are the well-known, established methods to form thin film membranes, which will be discussed in this review. Various effective recent developments on structural modification of metal oxide and incorporation of stabilizers for cyclic stability are also discussed.