• 한국철도학회논문집
• /
• 제12권6호
• /
• pp.1059-1066
• /
• 2009

근래에 와서 강화 플라스틱 복합재료의 생산과 함께 열경화성 수지 폐기물들의 양이 급격하게 증가하여 심각한 환경문제를 야기하고 있다. 우수한 기계적 물성을 지닌 유용한 열경화성 수지의 하나인 에폭시 수지는 열가소성 수지처럼 용융되거나 재 성형되지 않는다. 본 연구에서는 철도 차량용 탄소섬유 강화 에폭시 수지 복합재로부터 에폭시 수지를 분해하여 탄소섬유를 회수하는 일련의 실험을 수행하였다. 여러 분해공정들을 실험적으로 조사하여, 분해 효율과 회수되는 탄소섬유의 기계적 물성을 비교 검토하였다. 회수되는 탄소섬유가 서로 엉키는 것을 방지하기 위해서 각 복합재료 시편은 테플론 지지대로 고정시키고, 기계적인 교반을 가하지 않았다. 분해 생성물은 전자현미경(SEM), 기체 크로마토그라피 질량분석기(GC-MS) 및 만능재료시험기를 사용하여 분석하였다. 질산 수용액을 사용하는 분해 공정과 액상 및 기상 열분해 공정에서는 탄소섬유가 완전하게 회수되었다. 회수된 탄소섬유의 인장강도 감소율은 4% 미만으로 미미하였다.

• 한국토양비료학회지
• /
• 제42권Spc호
• /
• pp.51-56
• /
• 2009

토양학과 비료를 가르치기 위하여 다양한 방법이 동원되고 있다. 카툰은 강의자와 학생 모두에게 도움이 되는 가장 효과적인 방법의 하나다. 강의자는 강의하고자 하는 장에 근거한 이야기를 전개하는 축이 된다.? 그리고 카툰은 표현하고자 하는 내용을 정확하고 간결하게 표현하기 위한 정상적인 문장을 선택하고난 다음 적정한 삽화를 삽입하여야 한다. 카툰이 다루어야 할 주요 내용은 용어풀이, 영양흡수, 산도, 염류 축척, 수분, 오염, 화학비료, 퇴비, 그리고 일반 토양과 관련한 분야가 포함된다.

• 건축역사연구
• /
• 제23권3호
• /
• pp.7-19
• /
• 2014

The temple Hoeamsa(檜巖寺) was repaired by Naong(懶翁), and with this the power of the temple became far greater to be the greatest Buddhist temple during late Goryeo and early Joseon. Naong's reconstruction of Hoeamsa was originated from Jigong(指空)'s teaching 'Samsan Yangsu(三山兩水).' But it is not clear whether Samsan Yangsu really meant Hoeamsa. By the way, after 14 years, Naong suddenly remembered this word and began to repair Hoeamsa in a large scale. From this, we can guess that Naong tried to give the contemporary Buddhism some change through the repair of Hoeamsa. But, as King Gongmin(恭愍王) the greatest supporter of Naong was suddenly assassinated, the political situation changed a lot and Naong also died unexpectedly. Naong's death brought out the critical sense to Hoeamsa and, in the process to resolve the crisis, the repair of Hoeamsa began to be justified through diverse religious factors. As these were expanded and developed on and one, Hoeamsa came to be honored as the most divine temple in Korea during the early Joseon dynasty. Furthermore, into the cause structure for the Naong's repair of Hoeamsa, the influence of Jajang was added through Odaesan Buddhism. As we can well understand, late Silla situation of Jajang and the late Goryeo of Naong were very similar and the both Buddhist leaders should have derived out some religious solution for them. In other words, both of them had a similar recognition in finding the religious solution for the contemporary crises. It becomes a way to understand the Hoeamsa repairing structure taken by Naong and his disciples. Therefore, by comparing the similar religious solution structures given by Jajang and Naong and by clearer understanding on Samsan Yangsu spirit, we can see the repair of Hoeamsa and the related aspects more accurately.

• 디지털융복합연구
• /
• 제15권10호
• /
• pp.493-500
• /
• 2017

본 연구는 초산부의 신체상, 자기효능감, 양육스트레스의 관계를 확인하고 초산부의 양육스트레스에 미치는 요인을 파악하기 위한 연구이다. 자료 수집은 U시 소재의 2개 산부인과 전문병원에서 분만 한 초산부 134대상으로 설문지를 이용하여 2017년 1월 1일부터 3월 31일까지 실시하였다. 수집한 자료는 SPSS/WIN 22.0 program을 이용하여 기술통계, 상관관계, 다중회귀분석을 하였다. 연구 결과 신체상, 자기효능감, 양육스트레스는 유의한 상관관계가 있었으며, 초산부의 양육스트레스에 영향을 미치는 유의한 변수는 퇴원 후 지지자, 신체상, 가족의지지로 전체 설명력은 29.5%이었다. 따라서 초산부의 양육스트레스에 미치는 요인을 바탕으로 양육스트레스를 감소시키며, 양육스트레스에 대처할 수 있는 능력을 향상시킬 수 있는 프로그램의 개발이 필요하다. 또한 더 나아가 초산부가 지각하는 폭넓은 범위의 양육스트레스 원인 탐색 후 초산부를 위한 중재프로그램 개발이 필요하다.

• 한국수소및신에너지학회논문집
• /
• 제22권2호
• /
• pp.232-239
• /
• 2011

DME has received much attention because of its possible use as a fuel and a chemical feedstock. Chemical conversion of DME to olefin (DTO) over various SAPO-34 catalysts was carried out using a fixed bed reactor. Main products of the reaction were light olefins such as ethylene, propylene and butenes. The best reaction conditions for high life time of the catalyst and high selectivity of light olefins were a reaction temperature of $400^{\circ}C$ and a WHSV of $3.54h^{-1}$. In addition, it was found that the deactivation of a SAPO-34 catalyst can be significantly suppressed by the addition of $ZrO_2$ as a supporter.

• 한국간호교육학회지
• /
• 제9권2호
• /
• pp.329-339
• /
• 2003

The purpose of this study is to consider of meaning in life based on Frankl's theory and to propose of hospice nursing according to conceptual framework of meaning in life. The conceptual framework of meaning in life is composed of 4 phases. According to the first phase, acceptance & awareness of self and life, hospice nurse should helps dying patient to accept limitedness of human existence and death. and according to the second phase, actualization of creative value, hospice nurse can helps dying patient to discover meaning in life through doing a deed for last time before his death. According to the third phase, actualization of experiential value, hospice nurse can helps them to discovery of meaning by experiencing of love through meetings with other people, nature, and god. According to the forth phase, actualization of attitudinal value, hospice nurse can helps them to discovery of meaning by realizing meaning in suffering and death through exercising of the inner freedom to choose bravery and acceptance in the face of death and misfortune. As mentioned above, the Frankl's theory accords with the core of hospice nursing that helps people to accomplish human essence in suffering and death. therefore we accepted Frankl's point of view, asserted that one of the most important roles of a hospice nurse as a supporter and sustainer for dying patients is to help patients to find meaning in life even in the course of death. To achieve the goal, hospice nurses should try to have a firm faith through philosophical introspection about life, death, human existence and meaning in life what the most important goal of life is to discover meaning in life and human have the duty and responsibility of recognizing and pursuing meaning up to the last moment of life.

• Journal of Acupuncture Research
• /
• 제23권1호
• /
• pp.95-103
• /
• 2006

Objectives : This study was to evaluate the clinical effectiveness of Bee Venom acupuncture therapy for acute ankle sprain. Methods : From September 1st, 2005 to December 31st, 2005, the 60 patients who had visited Conmaul oriental medical hospital with acute ankle sprain were sample into 2 groups for this study; one group for the bee-venom acupuncture therapy combined with needle acupuncture therapy and the other group for needle acupuncture therapy only at least 3 times respectively. Both group had been treated with same additional infrared lamp, physical therapy and ankle supporter during the whole treatment period. Among 60 patients, 20 participants satisfied the whole inclusion criteria. To estimate the efficacy of treatments, Numerical Rating System(NRS) and Ankle-Hindfoot Scale(AHS) were applied before 1st and 4th treatment. Each score results were analysed and compared by Mann-Whitney test and Wilcoxon signed rank test with the level of 5% significance. Result : The NRS score in bee-venom acupuncture therapy group was increased significantly and the AHS score in bee-venom therapy group was decreased significantly compared to each of single acupuncture therapy group(P<0.01). The score change comparisons between the two groups had no significance before and after the treatment. Conclusion : Both bee-venom acupuncture therapy and single acupuncture therapy were effective to treat the acute ankle sprain. but there were no significant data to prove that bee-venom acupuncture therapy is more effective than single acupuncture therapy.

• 간호행정학회지
• /
• 제14권3호
• /
• pp.311-320
• /
• 2008

Purpose: This study was conducted to use as a preliminary data to improve the quality of clinical nursing education by comparing the perception of teaching effectiveness in nurses and nursing students. Method: The participants were 165 nurses and 289 nursing students. Data was collected from June 2 to 16, 2008. The research instruments used an effective clinical instructors which was developed by Reeve(1994). Result: The perception of teaching effectiveness in nurses and nursing students were 3.45 and 3.19 respectively and it showed that nurses' perception of teaching effectiveness are higher than that of nursing students. Nurses had strong points in the factors of "interpersonal relationship/ communication", "availability as a supporter", "teaching method and evaluation".In additions, the teaching effectiveness had significant differences to age, years of work, position, educational background and job satisfaction in nurses, otherwise, sex, differences of educational level, satisfaction of clinical practicum and major in students. Conclusion: It is needed a further study as below: to develop an education system which is to improve an interpersonal relationship and to upgrade the quality of educator; to develop a teaching method program of clinical nursing education to improve teaching effectiveness.

• 공학논문집
• /
• 제3권1호
• /
• pp.215-222
• /
• 1998

촉매 연소용 촉매 담체인 $\gamma-Al_2O_3$ 분말의 열안정화에 미치는 La과 Si의 첨가 효과에 대하여 연구하였다. 첨가제의 첨가는 습식 impregnation방법으로 행하였고, 출발 물질은 $La(NO_3)_3{\cdot}6H_2O$와 $Si(OC_2H_5)_4$를 사용하였다. 열안정화 효과는 혼합분말을 고온에서 열처리 한 후 비표면적을 측정하여 고찰하였다. 첨가제로 첨가한 La과Si는 모두 순수한 $\gamma-Al_2O_3$분말에 비하여 소결을 억제함으로써 열 안정화 효과가 있음이 확인되었으며, 특히 Si 첨가한 경우에는 $\alpha-Al_2O_3$의 생성을 현저히 억제한다는 것을 확인하였다. 이들 첨가제에 의한 열안정화 효과는 첨가제에 의한 새로운 상의 생성과 표면 확산의 억제등이 주된 요인으로 판단되었다.

• 천문학회보
• /
• 제35권2호
• /
• pp.56.1-56.1
• /
• 2010

MIRIS(Multipurpose InfraRed Imaging System)는 과학기술위성 3호의 주 탑재체로서 2011년 발사예정인 다목적 적외선 카메라 시스템이다. MIRIS는 우주관측 카메라와 지구관측 카메라로 구성되어 있으며, 우주관측 카메라는 $0.9-2.0{\mu}m$ 영역에서 3.67 deg. x 3.67 deg. FOV로 우리 은하평면 survey 관측과 우주배경복사(CIB) 관측을 수행할 것이다. 현재 MIRIS는 비행모델 개발 마무리 단계에 있으며, 검교정 시험, 열-진공 시험, 진동 시험 등을 수행하고 나면 2010년 말 위성 본체와의 조립을 진행할 것이다. 우주관측 카메라는 궤도상에서 태양, 지구의 적외선 복사와 망원경과 검출기 주변에서 발생하는 열잡음을 줄이기 위해 냉각이 필요하며, 제한된 위성의 무게와 부피, 전력등의 요구조건들 때문에 망원경 및 구조체의 복사냉각(Passive Cooling) 방법을 선택하였다. Passive cooling으로 우주관측 카메라의 망원경이 200K 이하로 냉각되면, dewar에 설치된 소형 냉각기를 가동하여 적외선 센서를 80K로 냉각한다. 위성체 내벽과 우주관측카메라의 각 구조체들 사이의 복사를 차단하기위해 30층의 MLI를 적용 하였고, 각 구조체들간의 열전도를 최소화하기위해 GFRP supporter를 적용하였다. 이 실험은 천문(연)에서 자체 제작한 열-진공 챔버를 활용하여 진행하였으며, 이미 인증모델에 대한 passive cooling 실험을 두 차례 실시하였고, 그 실험 결과를 반영하여 최종 비행모델에 대한 실험을 수행하였으며, 그 실험 결과에 대해 논의 하고자 한다.