• 제목/요약/키워드: Half Life

검색결과 1,829건 처리시간 0.029초

유아안전을 위한 부모교육의 경험 및 부모의 인식도 (The status of parents' education and their perception for young children's safety)

  • 홍명희;정영숙;장혜자
    • 한국생활과학회지
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    • 제13권5호
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    • pp.741-749
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    • 2004
  • The purpose of this study was parents' perception on young children's safety life, safety accident, and safety education and provided basic data of administrating parent education for young children's safety. Subjects of this study were 620 parents (310 fathers and 310 mothers) of young children attending at four public kindergartens and two day care centers located in C city and D county. The results of the study were as follows: First, regarding parents' perception on young children's safety life, parents thought that their perception and attitude would mostly affect young children' safety life. Second, with regard to parents' perception on safety accident, half of parents experienced such safety accident as accident during play, traffic accident, accident in dangerous places, accident from dangerous matters, accident in sport activities, fire, and electric shock. Third, most parents looked upon safety education as very important one, and fathers were more satisfied with the safety education administered by kindergartens. Fourth, with regard to parents' perception on parent education for young children's safety, most parents thought that parent education for safety would be necessary. They ranked traffic and play accidents as the most important contents of safety education.

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자아실현성과 공동의사결정에 관한 연구 - 남편과 부인을 중심으로 (A Study on the Relation between Husband and Wife's Self-Actualization and Joint Decision-Making)

  • 김성희;문숙재
    • 가정과삶의질연구
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    • 제7권2호
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    • pp.163-178
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    • 1989
  • This study was mainly concerned providing a basic of data for the more reasonable home management. The purpose study was to investigate the relationship of husbands and wives self-actualization and degree of joint decision-making. For the purpose of this study 500 questionaire were distributed to the marital in seoul. The 412 data were analized by Frequency, Percentage, T-test, ANOVA, Scheffe-test. The major findings of this study were as follows: 1) Over one and half of husbands and wives are try to be self-actualized. 2) The tendency of the husbands and wives decision-making was joint decision-making. 3) The important influential variables on the husbands and wives self-actualization husbands were age, life-cycle, job employment motivation. And wives were life-cycle, education, income, job, employment motivation. 4) The important influential variables on the joint decision-making were age, number of child, life-cycle. 5) A marital joint decision-making level differs significantly, according to the degree of husbands and wives self-actualization. The higher level of husbands and wives self-actualization, the higher degree of marital joint decision-making. The result of this study implies that a marital joint-making necessary in order to carry on happy home management and the reasonable home administration.

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STORAGE OF BROCCOLI BY MAKING THE WATER STRUCTURED -Suppression of metabolism-

  • Oshita, S.;Seo, Y.;Kawagoe, Y.;Rahman, M.A.
    • 한국농업기계학회:학술대회논문집
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    • 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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    • pp.918-925
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    • 1996
  • The effect of structured water by dissolution of xenon was examined from the view point of the suppression of both browning and respiratory metabolism of broccoli. The structured water is formed duet to hydrophobic interaction when xenon gas dissolves into water. NMR measurements were carried out to determine proton spin-spin relaxation time, T2, for water. There was a difference in proton T2 between distilled water and structured water. This can be interpreted as the change of water structure. Fro the broccoli cut in half stored for 16 days at 279K, the section color did not change appreciably for the sample whose water was structured by dissolution of xenon whose initial partial pressure was 0.39MPa. In contrast to this, the browning of section surface was observed for the sample stored under the condition of nitrogen gas at the same partial pressure as xenon and for the sample stored under atmospheric condition . These results led to the conclusion that the suppression of b owning by oxidation was due to structured water but not to applied pressure. Adding to this, the water structured by xenon has resulted in suppression of respiratory metabolism of broccoli.

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과학기술분야 자료의 폐기기준에 관한 연구 - 원자력분야 자료를 중심으로- (A Study on Weeding of the Literature in the Field of Science and Technology)

  • 천영춘;이성호
    • 정보관리연구
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    • 제28권1호
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    • pp.62-89
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    • 1997
  • 본 연구의 목적은, (1) 과학기술문헌정보 중 원자력분야 문헌정보의 인용분석을 통하여 정보자료의 수명 측정과, (2) 한국원자력연구소의 실제 폐기데이터의 평균수명을 측정하고, (3) 인용문헌의 실제이용율에 대한 예측과 문제를 보완하기 위하여 동연구소에서 1992년 1994년 까지의 이용(대출)통계 분석을 통한 정보자료이용의 수명을 측정하였다. 그리하여 이들 결과에 입각한 장서폐기 모형을 설계함으로써 점차 문제로 대두되고 있는 과학기술분야 정보자료의 폐기에 대한 효과적이고 합리적인 폐기기준을 모색하였다.

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Metagenomic Analysis of the Fecal Microbiomes of Wild Asian Elephants Reveals Microflora and Enzymes that Mainly Digest Hemicellulose

  • Zhang, Chengbo;Xu, Bo;Lu, Tao;Huang, Zunxi
    • Journal of Microbiology and Biotechnology
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    • 제29권8호
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    • pp.1255-1265
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    • 2019
  • To investigate the diversity of gastrointestinal microflora and lignocellulose-degrading enzymes in wild Asian elephants, three of these animals living in the same group were selected for study from the Wild Elephant Valley in the Xishuangbanna Nature Reserve of Yunnan Province, China. Fresh fecal samples from the three wild Asian elephants were analyzed by metagenomic sequencing to study the diversity of their gastrointestinal microbes and cellulolytic enzymes. There were a high abundance of Firmicutes and a higher abundance of hemicellulose-degrading hydrolases than cellulose-degrading hydrolases in the wild Asian elephants. Furthermore, there were a high abundance and a rich diversity of carbohydrate active enzymes (CAZymes) obtained from the gene set annotation of the three samples, with the majority of them showing low identity with the CAZy database entry. About half of the CAZymes had no species source at the phylum or genus level. These indicated that the wild Asian elephants might possess greater ability to digest hemicellulose than cellulose to provide energy, and moreover, the gastrointestinal tracts of these pachyderms might be a potential source of novel efficient lignocellulose-degrading enzymes. Therefore, the exploitation and utilization of these enzyme resources could help us to alleviate the current energy crisis and ensure food security.

Juniperus chinensis extract induces apoptosis via reaction oxygen species (ROS) generation in human pancreatic cancer cell lines

  • Go, Boram;Han, Song-I;Lee, Jungwhoi;Kim, Da-Hye;Kim, Chang-Sook;Kim, Jae Hoon
    • Journal of Applied Biological Chemistry
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    • 제63권4호
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    • pp.457-462
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    • 2020
  • Pancreatic cancer is among the most difficult-to-treat tumors. More than half of patients with this cancer have very few symptoms at the early stages, allowing the development of distant metastases and resistance to cancer treatment. In this study, we found that Juniperus chinensis extract (JCX) decreased the cell viability and migration activity of PANC-1 and SNU-213 pancreatic cancer cells in a dose-dependent manner. JCX increased caspase-3 activation and generation of reactive oxygen species (ROS). N-acetylcysteine treatment blocked JCX-induced ROS generation and the negative effects on pancreatic cancer cell viability. In addition, JCX down-regulated the levels of phospho-focal adhesion kinase (p-FAK) and phospho-extracellular signal-regulated kinase (p-ERK). Together, these results indicate that JCX induces apoptosis in human pancreatic cancer cell lines through ROS production, downregulating FAK/ERK signaling and activating caspase-3. We propose that JCX-derived compounds represent candidates for the development of alternative medicines for the treatment of pancreatic cancer.

우리나라 식생활 개선 정책의 시대적 변화에 대한 고찰 (Evaluation on Food Policy classified by period on Korean)

  • 계승희
    • 대한가정학회지
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    • 제32권1호
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    • pp.165-180
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    • 1994
  • The change in the police concerning food and dietary life were analyzed in order to provide bases of establishing policy of food and dietary life properly. The last half one century was divided into six periods as follows ; The period since liberlation from Japanese rule(1945-1949) the 1950's (1950-1959) 1960's (1960-1969) 1970's (1970-1979) 1980's (1980-1989) 1990's (1990-1992). Dietary life by 1960's were a life of distress and policies coducted by government took on an relief supply of food at this period. Movement about 'intake of mixed rice with barley and foods from flour' to supress rice consumption were encouraged by government. And Korean recommended dietary allowance was made and the national nutritional survey was practived in the first place by the Ministry of Health and Social Affairs. Dietary life of the country begin to improve sharply along with rice self-sufficiency since 1975 With the growth of food and eating out industry intake of instant food processed food and fast food has increased at the 1980's To ministry of Health and Social Affairs drove campaign of 'Joo-Moon Sik Dahn Je' for dietary life improvement at 1981 The Ministry of Education made and announced a 'School Feeding Law' at 1981 The government that is the Office of Permier and the Ministry of Health and Social Affairs developed compaign for improvement of dietary life and drove 'Jo Eun Sik Dahan Je' with Association of restaurant jointly. Policy on food and dietary life conducted by government up to data were planned mainly dependent on food production supply and demand of food. Infectious diseases continue to decrease with increasing of degenerative diseases which will be required proper management of dietary life. In the future more aggressive intergrated food policy are needed to maintain the public health. Aoso dietary improvement movement should be drived actively.

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심혈관질환자 삶의 질에 대한 국내 연구논문 분석 (Analyses of the Studies on Cardiovascular Disease-Specific Quality of Life Reported in Korea)

  • 이은현;탁승제;송영숙
    • 성인간호학회지
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    • 제17권3호
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    • pp.452-463
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    • 2005
  • Purpose: The purpose of the present study was to analyze and evaluate prior studies published in Korea on the cardiovascular disease-related quality of life, in order to make recommendations for further research. Methods: A total of 15 studies were selected from four databases(Digital library of Research Information Center for Health, Korea Medical Database, MedRic, and National Assembly Library). The selected studies were analyzed according to criteria, such as diagnosis/operation, used instrument, generic/specific instrument, dimension of quality of life, translation/ back-translation, sample size, reliability, validity, responsiveness, number of items, type of scale, time required, and independent variables. Results: Of the 15 cardiovascular disease-related quality of life studies, approximately half of them were conducted with hypertension or ischemic heart disease patients. All studies asserted that the concept of quality of life had multidimensional attributes. With respect to the questionnaire used for measuring the quality of life, only one study used a cardiovascular disease specific-instrument and most studies did not consider whether or not the validity of their instrument had been established. In addition, when using questionnaires developed in other languages, only one study employed a translation/back-translation technique. The types of variables tested for their influence on quality of life were quite limited. Conclusion: It is recommended to develop a reliability and validity established cardiovascular disease specific-quality of life for Korean patients and to identify associated new variables.

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Prediction of the remaining service life of existing concrete bridges in infrastructural networks based on carbonation and chloride ingress

  • Zambon, Ivan;Vidovic, Anja;Strauss, Alfred;Matos, Jose;Friedl, Norbert
    • Smart Structures and Systems
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    • 제21권3호
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    • pp.305-320
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    • 2018
  • The second half of the 20th century was marked with a significant raise in amount of railway bridges in Austria made of reinforced concrete. Today, many of these bridges are slowly approaching the end of their envisaged service life. Current methodology of assessment and evaluation of structural condition is based on visual inspections, which, due to its subjectivity, can lead to delayed interventions, irreparable damages and additional costs. Thus, to support engineers in the process of structural evaluation and prediction of the remaining service life, the Austrian Federal Railways (${\ddot{O}}$ BB) commissioned the formation of a concept for an anticipatory life cycle management of engineering structures. The part concerning concrete bridges consisted of forming a bridge management system (BMS) in a form of a web-based analysis tool, known as the LeCIE_tool. Contrary to most BMSs, where prediction of a condition is based on Markovian models, in the LeCIE_tool, the time-dependent deterioration mechanisms of chloride- and carbonation-induced corrosion are used as the most common deterioration processes in transportation infrastructure. Hence, the main aim of this article is to describe the background of the introduced tool, with a discussion on exposure classes and crucial parameters of chloride ingress and carbonation models. Moreover, the article presents a verification of the generated analysis tool through service life prediction on a dozen of bridges of the Austrian railway network, as well as a case study with a more detailed description and implementation of the concept applied.

교원 은퇴자의 삶의 여정에 관한 생애사 연구 (The Life History Study on the Life Journey of Retired Teachers)

  • 박종환;윤선숙
    • 한국콘텐츠학회논문지
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    • 제21권1호
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    • pp.626-638
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    • 2021
  • 본 연구는 생애사 연구로서 교직에서 은퇴한 유·초·중등의 남·여 교원의 삶을 통하여 은퇴의 의미와 적응과정을 탐색하여 교원 은퇴자들에게 개인적·사회적 필요가 무엇일지 알아보고자 하였다. 연구 결과, 어린 시절의 성장 경험과 학창 시절의 경험은 학생에게 선한 영향을 주거나 하지 말아야 할 행위의 한계를 설정하는데 기여하는 등, 오롯이 본인의 직업 수행에 영향을 준 것을 알 수 있었다. 상호의존의 시기에 단순 직업인을 넘어서 사회와 국가에 봉사하는 데에 기여하였고, 교직 후반기에는 아픈 경험이 자원이었고 '생각을 바꾸니 세상이 바뀌었다'는 표현으로 깨달음을 얻었다고 하였다. 교원이 미치는 행위의 영향이 다른 직업과 달리 다수의 대상에게 미친다는 점에서 교원 은퇴자들에게는 은퇴 전의 직업에 대한 보람이나 만족감이 다른 직종과 대비될 정도로 컸다. 그러나 은퇴 후에 교원 은퇴자들은 무한 자유에 행복을 느끼면서도 소속감과 성취감 없는 삶에 심리적인 공허함을 느꼈다. 그리고 새로운 공부에 도전하며 삶의 이모작을 위한 끊임없는 전진을 하고 있었다.