RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      선택해제
      • 좁혀본 항목 보기순서

        • 원문유무
        • 원문제공처
          펼치기
        • 등재정보
          펼치기
        • 학술지명
          펼치기
        • 주제분류
          펼치기
        • 발행연도
          펼치기
        • 작성언어
        • 저자
          펼치기

      오늘 본 자료

      • 오늘 본 자료가 없습니다.
      더보기
      • 무료
      • 기관 내 무료
      • 유료
      • KCI등재

        국내 직업진로체험기관의 이용경험자 만족도 조사 연구

        김정원 ( Kim¸ Jungwon ),강현주 ( Kang¸ Hyounju ),이효섭 ( Lee¸ Hyoseop ),조대연 ( Cho¸ Dae-yeon ) 인하대학교 교육연구소 2020 교육문화연구 Vol.26 No.6

        본 연구의 목적은 직업진로체험기관과 프로그램 운영 만족도 조사를 통해 직업진로체험기관 운영의 발전적 방향성을 모색하는 데 있다. 본 연구 수행을 위해 문헌분석 및 전문가 자문을 거쳐 최종 17개의 문항을 도출하였고, 수도권지역 학생, 학부모, 교사 총 1,312명을 대상으로 설문을 실시하였다. 조사 결과, 학생들은 전반적으로 시설 안전성, 정보 접근성, 평가관리 등 시설 및 프로그램 운영에서 만족도가 높았으나, 진로탐색 지원이나 직업진로상담 제공등과 같은 프로그램 자체에 대한 만족도는 낮았다. 교사 대상 분석 결과, 체험기관 운영 및 프로그램에 관한 전반적인 만족도가 높게 나타났다. 시설 안전성, 체험기관 소개, 프로그램 안내 및 예약관련 정보 접근성, 다양한 직종 제공에서 가장 높은 만족도를 보였다. 학부모의 시설 및 프로그램 운영에 대한 전체적인 만족도는 이용경험자 집단 중 가장 낮은 것으로 나타났다. 학부모들이 가장 높은 만족도를 나타낸 항목들은 다양한 직종의 체험 프로그램 제공, 수준별 내용구성, 정보 접근성 등의 순이었다. 이러한 연구결과에 근거하여 직업진로체험기관 및 프로그램 운영의 발전을 위해 프로그램 다양화, 강사 관리 중요성, 유기적인 네트워크 구축 등 실천적 시사점을 제공하였다. 마지막으로 본 연구는 향후 직업진로체험기관과 프로그램 운영을 위한 기초 자료를 제공한다는 점에서 의미를 가진다. The purpose of this study is to explore the direction for the development of vocational career experience institutions and experience programs through surveys on the satisfaction level of vocational career experience facilities and program operation. For the satisfaction survey, the final 17 questions were derived through literature analysis and expert advice. Based on this, the survey was conducted for a total of 1,312 students, parents, and teachers. As a result of the survey, first, students were generally highly satisfied with the operation of institutions and programs such as facility safety, information accessibility, and evaluation management. Second, as a result of the analysis for teachers, it was found that the overall satisfaction with the operation of the career experience institution and the program was higher than the other groups. According to the results on teacher’s group, the highest satisfaction was shown in facility safety, introduction of experience facilities, access to information related to program information and reservations, and provision of various occupations. Third, parents' overall satisfaction with the operation of institutions and programs was the lowest among the other groups. The items that parents showed higher satisfaction were in the order of providing experience programs for various occupations, content composition by level, access to information, and safety of facilities. Based on these findings, practical suggestions and limitations for the development of vocational career experience institutions and programs were discussed.

      • SCISCIESCOPUS
      • SCIESCOPUS

        Titanium dioxide surface modified with both palladium and fluoride as an efficient photocatalyst for the degradation of urea

        Kim, Hyoung-il,Kim, Kitae,Park, Soona,Kim, Wooyul,Kim, Seungdo,Kim, Jungwon Elsevier 2019 Separation and purification technology Vol.209 No.-

        <P><B>Abstract</B></P> <P>TiO<SUB>2</SUB> surface modified with both Pd nanoparticles and fluorides (F-TiO<SUB>2</SUB>/Pd) was prepared and applied as a photocatalyst in the degradation of urea. Various surface analysis techniques, including X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy, and energy-dispersive X-ray spectroscopy, were used to verify the coexistence of Pd nanoparticles and fluorides on the surface of TiO<SUB>2</SUB> in F-TiO<SUB>2</SUB>/Pd. F-TiO<SUB>2</SUB>/Pd showed a higher photocatalytic activity than those of bare TiO<SUB>2</SUB> and single-component-modified TiO<SUB>2</SUB> photocatalysts such as fluorinated TiO<SUB>2</SUB> (F-TiO<SUB>2</SUB>) and Pd-loaded TiO<SUB>2</SUB> (Pd/TiO<SUB>2</SUB>). The higher urea degradation efficiency of F-TiO<SUB>2</SUB>/Pd is ascribed to the enhanced production of hydroxyl radicals (<SUP> </SUP>OH) by the synergistic action of the surface Pd and fluoride. Pd nanoparticles and fluorides facilitate the transfer of valence band holes (h<SUB>vb</SUB> <SUP>+</SUP>) and their reaction with water molecules, respectively, synergistically enhancing the production of <SUP> </SUP>OH. The photocatalytic activity of F-TiO<SUB>2</SUB>/Pd for the degradation of urea increased upon increasing the fraction of the fluorinated TiO<SUB>2</SUB> surface, which is higher at higher fluoride concentrations and lower pH. Although Pt/TiO<SUB>2</SUB> showed higher photocatalytic activity for the degradation of urea than those of Pd/TiO<SUB>2</SUB> and Au/TiO<SUB>2</SUB>, the strong positive effect of fluoride complexation was only exhibited by Pd/TiO<SUB>2</SUB> (a slight positive effect and a negative effect were observed for Au/TiO<SUB>2</SUB> and Pt/TiO<SUB>2</SUB>, respectively). As a result, the degradation of urea proceeded more rapidly in a UV-irradiated suspension of F-TiO<SUB>2</SUB>/Pd than when any of other photocatalysts (i.e., bare TiO<SUB>2</SUB>, Pd/TiO<SUB>2</SUB>, F-TiO<SUB>2</SUB>, Au/TiO<SUB>2</SUB>, F-TiO<SUB>2</SUB>/Au, Pt/TiO<SUB>2</SUB>, and F-TiO<SUB>2</SUB>/Pt) were used under the same conditions. The first-order degradation rate constants (<I>k</I>) of urea depending on the type of TiO<SUB>2</SUB> were as follows: 0.097 h<SUP>−1</SUP> for bare TiO<SUB>2</SUB>, 0.158 h<SUP>−1</SUP> for Pd/TiO<SUB>2</SUB>, 0.151 h<SUP>−1</SUP> for F-TiO<SUB>2</SUB>, 0.351 h<SUP>−1</SUP> for F-TiO<SUB>2</SUB>/Pd, 0.173 h<SUP>−1</SUP> for Au/TiO<SUB>2</SUB>, 0.223 h<SUP>−1</SUP> for F-TiO<SUB>2</SUB>/Au, 0.240 h<SUP>−1</SUP> for Pt/TiO<SUB>2</SUB>, and 0.165 h<SUP>−1</SUP> for F-TiO<SUB>2</SUB>/Pt, respectively. In addition, F-TiO<SUB>2</SUB>/Pd proved to be stable in repeated urea degradation cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> TiO<SUB>2</SUB> surface modified with both Pd nanoparticles and fluorides is prepared. </LI> <LI> F-TiO<SUB>2</SUB>/Pd shows superior photocatalytic activity for the degradation of urea. </LI> <LI> Synergistic action of surface Pd and fluoride markedly enhances the production of <SUP> </SUP>OH. </LI> <LI> Fluoride complexation on Pd/TiO<SUB>2</SUB> is more efficient than that on Au/TiO<SUB>2</SUB> and Pt/TiO<SUB>2</SUB>. </LI> <LI> F-TiO<SUB>2</SUB>/Pd is stable in repeated urea degradation cycles. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

      • SCISCIESCOPUS
      • SCISCIESCOPUS
      • KCI등재후보

        Review of carcinogenicity of hexavalent chrome and proposal of revising approval standards for an occupational cancers in Korea

        Jungwon Kim,Sangyun Seo,Yangho Kim,Dae Hwan Kim 대한직업환경의학회 2018 대한직업환경의학회지 Vol.30 No.-

        Background: The objective of this study is to suggest revised recognition standards for occupational disease due to chromium (VI) by reflecting recent domestic and international research works and considering domestic exposure status with respect to target organs, exposure period, and cumulative exposure dose in relation to the chromium (VI)-induced occupational disease compensation. Methods: In this study, the reports published by major international institutions such as World Health Organization (WHO) International Agency for Research on Cancer (IARC) (2012), Occupational Safety and Health Administration (OSHA) (2006), National Institute for Occupational Safety and Health (NIOSH) (2013), American Conference of Governmental Industrial Hygienists (ACGIH) (2004), National Toxicology Program (NTP) (2014), and Agency for Toxic Substances and Disease Registry (ASTDR) (2012) were reviewed and the recent research works searched by PubMed were summarized. Results: Considering the recent research works and the domestic situation, only lung cancer is conserved in the legislative bill in relation to chromium (VI), and the exposure period is not included in the bill. Nasal and paranasal sinus cancer was excluded from the list of cancers that are compensated as the chromium (VI)- induced occupational disease, while lung cancer remains in the list. In the view of legislative unity, considering the fact that only the cancers having sufficient evidence are included in the conventional list of cancers compensated as occupational disease, nasal and paranasal sinus cancer having limited evidence were excluded from the list. The exposure period was also removed from the legislative bill due to the insufficient evidence. Recent advices in connection with cumulative exposure dose were proposed, and other considerable points were provided with respect to individual occupational relevance. Conclusions: It is suggested that the current recognition standard which is “Lung cancer or nasal and paranasal sinus cancer caused by exposure to chromium (VI) or compounds thereof (exposure for two years or longer), or nickel compounds” should be changed to “Lung cancer caused by exposure to chromium (VI) or compounds thereof, and lung cancer or nasal and paranasal sinus cancer caused by exposure to nickel compounds”.

      • Osmotically enhanced dewatering-reverse osmosis (OED-RO) hybrid system: Implications for shale gas produced water treatment

        Kim, Jungwon,Kim, Jungbin,Kim, Junghyun,Hong, Seungkwan Elsevier 2018 Journal of membrane science Vol.554 No.-

        <P><B>Abstract</B></P> <P>Managing shale gas produced water (SGPW) is one of the greatest challenges for shale gas industry due to its high salinity and water volume. Osmotically enhanced dewatering (OED) has great potential for treating SGPW because of its higher water recovery and lower energy consumption. This study systematically investigated the effects of operating conditions on OED performance through numerical simulation of membrane modules. The simulation results first showed that OED achieved higher water recovery over forward osmosis (FO) due to less internal concentration polarization (ICP). Water recovery could be higher with decreasing feed flow fraction, increasing normalized membrane area, and increasing hydraulic driving force fraction. It was also demonstrated that OED-RO hybrid process was able to yield more water with similar energy efficiency as one-stage RO, for SGPW of 28.5 g/L total dissolved solids (TDS) under realistic conditions considering inefficiency associated with pump and energy recovery device (ERD). Lastly, to validate our findings, OED experiments were performed with pre-treated real SGPW as a feed solution, and exhibited good agreement with the simulation results. Specifically, water recovery was achieved up to 67% with a high rejection rate of over 97% for most ions at a hydraulic pressure of 30 bar. Our modeled and experimental observations suggest that the OED-RO process can be an energy-efficient process in concentrating high salinity wastewater.</P> <P><B>Highlights</B></P> <P> <UL> <LI> OED process at module-scale was simulated for treating SGPW with high salinity. </LI> <LI> OED exhibited higher water recovery over FO due to less ICP. </LI> <LI> OED-RO yielded more water with the similar energy efficiency as one-stage RO. </LI> <LI> OED was able to extract water up to 67% from real SGPW with a pressure of 30 bar. </LI> <LI> SGPW treatment by OED-RO agreed well with the simulation results. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

      연관 검색어 추천

      이 검색어로 많이 본 자료

      활용도 높은 자료

      해외이동버튼