• 제목/요약/키워드: the 1970s

검색결과 2,234건 처리시간 0.028초

Development of Water Quality Modeling in the United States

  • Ambrose, Robert B;Wool, Tim A;Barnwell, Thomas O.
    • Environmental Engineering Research
    • /
    • 제14권4호
    • /
    • pp.200-210
    • /
    • 2009
  • The modern era of water quality modeling in the United States began in the 1960s. Pushed by advances in computer technology as well as environmental sciences, water quality modeling evolved through five broad periods: (1) initial model development with mainframe computers (1960s - mid 1970s), (2) model refinement and generalization with minicomputers (mid 1970s - mid 1980s), (3) model standardization and support with microcomputers (mid 1980s - mid 1990s), (4) better model access and performance with faster desktop computers running Windows and local area networks linked to the Internet (mid 1990s - early 2000s), and (5) model integration and widespread use of the Internet (early 2000s - present). Improved computer technology continues to drive improvements in water quality models, including more detailed environmental analysis (spatially and temporally), better user interfaces and GIS software, more accessibility to environmental data from on-line repositories, and more robust modeling frameworks linking hydrodynamics, water quality, watershed and atmospheric models. Driven by regulatory needs and advancing technology, water quality modeling will continue to improve to better address more complicated water bodies and pollutant types, and more complicated management questions. This manuscript describes historical trends in water quality model development in the United States, reviews current efforts, and projects promising future directions.

한국 미취학 아동의 영양성 빈혈에 관한 연구 (A Study on Nutritional Anemia of Pre-school Children in Korea)

  • 채범석;주덕숙
    • Journal of Nutrition and Health
    • /
    • 제4권1호
    • /
    • pp.1-19
    • /
    • 1971
  • Nutritional anemia is an important nutritional problem affecting large population groups in most developing countries. Nutritional anemia is caused by the absence of any dietary essential involed in hemoglobin formation or by poor absorption of these dietary components. The most likely causes are lack of dietary iron, and folate, vitamin $B_{12}$ and high qualify protein. Anemia is considered to be a late mainfeastation of nutritional deficiencies, and even mild anemia is not the earilest sign of such a deficiency. Therefore, the object of therapy is to correct underlying deficiency rather than merely its manifestation. Iron deficiency anemia is generally much the most common form of anemia. And it is very prevalent particularly in pregnant women and young children, especially under five year of life. According to the rapid growth rate of infants, dietary iron should he provided for infants over three months of age in adequate amounts for the synthesis of hemoglobin required by the increasing blood volume and for the demands of newly formed cells. The principal causes of iron deficiency anemia are an inadequate dietary iron content, interference with absorption of iron from the intestine, excessive losses of iron from the body, disturbance of iron metabolism by infection, and social and cultural environments. The present study is planned to obtain informations concerning nutritional anemia through anthropometric and biochemical determinations for the assessment of nutriture in pre-school children. Determination was taken in 226 pre-school children in ruraI arae in 1968, 122 pre-school children in 1970, and 1526 hospitalized pre-school children in 1970. The results of this study are as follows; (1) According to Iowa Malnutrition Borderline (85 percentile) for weight, the proportions of underweighed pre-school boys and girls in rural area were 47.2% and 46.2% in1968, and were 36.1% and 51.8% in 1970. According to Iowa Malnutrition Borderline for height, the proportions of underheight boys and girls in rural area were 30.5% and 33.7%, and were 26.2% and 21.8% in 1970. Malnutrition scores of underweight for height values of boys and girls in rural area were 19.3 and 17.3 in 1968, and the scores of boys and girls were 15.6 and 15.5 in 1970. (2) The mean hemoglobin values of boys and girls in rural area were $11.2{\pm}1.8g/100ml\;and\;11.4{\pm}1.6g/100ml$ in 1968. In 1970, the mean values of boys and girls in rural area were $11.3{\pm}1.3g/100ml\;and\;11.7{\pm}2.4g/100ml$. The mean hemoglobin values of hospitalized boys and girls were $11.9{\pm}2.2g/100ml\;and\;11.7{\pm}2.4g/100ml$ in 1970. It is found that 92 of 215 children (42.7%) in rural area had concentrations of hemoglobin less than 11.0g/100ml in 1968. In 1970, 55 of 121 children (45.4%) in rural area and 559 of 1526 hospitalized children (36.6%) had concentrations of hemoglobin less than 11.0g/100ml. (3) The mean hematocrit levels of hospitalized boys and girls were $35{\pm}26.8%\;and\;35.4{\pm}6.4%$ in 1970. And 443 of 1334 hospitalized children (33.2%) had hematocrit values below 33%. (4) The average mean corpuscular hemoglobin concentration levels of hospitalized boys and girls were $32.4{\pm}2.2\;and\;32.3{\pm}2.2$ in 1970. And 1016 of 1352 hospitalized children (75.1%) had the mean corpuscular hemoglobin values below 34. (5) The mean iron values of young children in rural area and hospitalized children were $62.0{\pm}6.3{\mu}g/100ml\;and\;60.7{\pm}22.8{\mu}g/100ml$. The proportions of anemia cases below $50{\mu}g/100ml$ in rural area was 37.9%, and 34.3% in hospitalized children. (6) The mean total iron binding capacity of young children in rural area was $376{\pm}57.88{\mu}g/100ml,\;and\;342.2{\pm}6.15{\mu}g/100ml$ in hospitalized children. (7) The average transferrin saturation percentage of young children in rural area was $16.9{\pm}4.7%,\;and\;18.0{\pm}8.4%$ in hospitalized children. The proportions of anemia cases below 15% of young chi1dren in rural area and hospitalized children were 48.3% and 41.2%. Therefore, authors wish to recommend that the following further studies should be undertaken: (1) Standardization of simplied laboratory examination of nutritional anemia. (2) The prevalence of nutritional anemia and the requirements of iron, folate, and vitamin $B_{12}$ of pre-school children. (3) The content and absorption of iron in Korean food. (4) The pathogenesis of nutritional anemia and prevention of parasitic disease. (5) Maternal health and nutrition education.

  • PDF

나전칠 공예품 제작과 수급(需給)에 관한 연구 - 나전칠기장 민종태 제작 활동를 중심으로 - (A Study on the Production, Supply and Demand of Najeonchil Craft Works with a Focus on the Artisan, Min Jong-tae)

  • 채영
    • 헤리티지:역사와 과학
    • /
    • 제56권3호
    • /
    • pp.100-115
    • /
    • 2023
  • 나전칠공예는 구한말 근대화를 시작으로 6.25전쟁 이후 산업 발전에 힘입어 본격적인 현대화의 길을 걷는다. 1900년대 전반에 걸쳐 펼쳐지는 나전칠공예의 흥망성쇠는 여타 공예 종목과 비교하였을 때 매우 다채롭다. 본 연구는 1929년 나전칠기계에 입문하여, 칠십 평생을 나전칠 공예품과 가구 제작에 매진한 민종태의 제작과 수급 활동을 주제로 한다. 민종태는 근대 나전칠기계의 중시조 격인 전성규의 제자로 살아생전 김봉룡, 송주안, 심부길, 김태희 등과 어깨를 나란히 했던 나전칠기 장인이자 사업가이다. 특히 그는 한국 현대 나전칠공예의 호황기인 1970~80년대 주요 수급지였던 서울에서 가장 활발히 활동했다. 그럼에도 불구하고 그에 대한 연구는 거의 전무한 실정이다. 본 연구에서는 민종태 나전칠공예의 입문과 광복 전후의 초기 활동을 기술하고, 본격적인 나전칠 공예품 제작과 수급 체계를 갖추어나가는 1950-60년대를 다루었다. 또한 1970~80년대 이른바 '장롱문화' 시대를 맞이하여 큰 규모의 가구를 제작하였을 뿐 아니라 일본에 향합과 차통 등을 수출했던 그의 수급 활동을 관련 자료들과 함께 살펴 보았다. 이러한 과정을 통해 서울시 무형문화재 제14호 나전칠기장 보유자였던 민종태 제작 활동의 공예사적 의의를 찾고자 하였다.

여성과 문헌정보학 (Women and library & information science)

  • 김갑선
    • 정보관리학회지
    • /
    • 제14권2호
    • /
    • pp.191-212
    • /
    • 1997
  • 본 연구의 목적은 문헌정보학에서의 여성관련연구를 검토하고, 여성주의 문헌정보학을 전개하고자 하는데 있다. 이에 따라 정보생산자, 정보이용자, 정보관리자로 여성관련연구를 범주화한 여성의 재현양식을 제시하고, 지난 27년간 (1970-1996)의 국내외 21종의 주요 문헌정보학 학술지의 여성관련연구 83편을 분석하였다. 여성주의 문헌정보학은 여성주의 이론을 인식론적 기반으로 하여, 문헌정보학 연구에 있어 성별을 유용한 분석범주로 채택하는 것이다 .

  • PDF

수학적 모델링과 수학화 및 문제해결 비교 분석 (Comparison and Analysis among Mathematical Modeling, Mathematization, and Problem Solving)

  • 김인경
    • 한국수학사학회지
    • /
    • 제25권2호
    • /
    • pp.71-95
    • /
    • 2012
  • 현재 수학교육에서 큰 흐름을 이루고 있는 수학적 모델링, 수학화, 문제해결을 살펴보았다. 먼저, 1990년대 이후 수학교육에서 활발히 연구되기 시작한 수학적 모델과 수학적 모델링을 살펴보았다. 그리고 1970년대 Freudenthal가 주장한 수학화를 분석하여 수학적 모델링과 비교분석하였다. 또한, 1980년대 이후 수학교육의 중심이 된 문제해결도 살펴보고, 이를 수학적 모델링과 비교분석하였다.

스트리트 패션을 근원으로 한 영 패션의 형성에 대한 연구 (A study on the formation of Youth's Fashion based on Street Fashion)

  • 신혜영
    • 복식
    • /
    • 제27권
    • /
    • pp.5-16
    • /
    • 1996
  • In today's fashion Street is a birthplace of new generation fashion and Street Fashion have frequently influenced on high fashion. From this view point this study is a meaningful approach to forecast future fashion trend by examining the street style of youth who are regarded as Street Fashion leaders. The purpose of this study is to examine the Youth Fashion style in early 1990s and to pro-vide a reference to fashion designer and mer-chandiser in trend forecasting and product plan-ning. This study is focused on 1990s Youth Fashion style through the historical Street Fashion : 1950s Teddy boys & Mods 1960s Hippies & Skinhead and 1970s Punk. There were mainly two popular Street Fashion phenomena in early 1990s. There were mainly two popular Street Fashion phenomena in early 1990s. One is grunge fashion created by new gener-ation in opposition to existing generation society and impacting on hish fashion leaders. The other is Remix style that is mixed : sub culture fashion originated by young group in 1950-1970s with 1990s sensitivity. Both fashion styles origionated and led by youth of street have influenced on famous high fashion designeres as well as the general public. Street Fashion will continue to play an import-ant role in future fashion and more study and interest on Street Fashion should be taken by fashion forecaster and related.

  • PDF

베르너 팬톤의 의자디자인에 나타난 표현특성에 관한 연구 - 1955년부터 1970년까지 디자인된 의자를 중심으로 - (A Study on the Expressive Characteristics in Verner Panton's Chair Design - Focused on chairs designed from 1955 to 1970 -)

  • 김진우
    • 한국실내디자인학회논문집
    • /
    • 제14권2호
    • /
    • pp.178-187
    • /
    • 2005
  • The Danish furniture designer, Verner Panton's work is comprised of the appreciation and application of the traditional for the application of a wide range of high-tech material accompanied by the bold and primary color used his work, the purpose of this study is to draw the expressive characteristics apparent in his work by analyzing the origin, background and case study of his design. The origin including the background of Verner Panton's design is based on the identity of the Danish Modernism and International design trend, which is revolved around the pop culture and is under the direct influence of Martin Johansen and Poul Henningsen. In order to understand the expressive characteristics found in the Verner Panton's chair design, a case study was conducted from 1955 where his debut piece of work, Cone chair was premiered at the Fredericia furniture Fair up through 1970 where Visiona 2 project was presented at the Koln International furniture fair. As a result, the total of 41 chair designs was analyzed by the following four criteria: form, finishing, functionality, and structure. According to the result of the analysis, the design by Verner Panton was based on the experiment of the organic form, his tendency to the pop culture, the concept of space, mobility, simplicity, and sensible creativity of space. Once criticized for being extemporary and consumptive, nevertheless, the outcome of Verner Panton's chairs not only introduced the fresh new and positive ideas that have been mass-producing for over 40 yews but also they keep on getting upgraded in accordance with the development of material.

명상관련 논문의 연구동향 분석 (An Analysis of Research Trends on Meditation)

  • 김문영
    • 대한간호학회지
    • /
    • 제27권4호
    • /
    • pp.923-932
    • /
    • 1997
  • This study was done to analyze research trends and to suggest future perspectives for nursing research on meditation. The author reviewed 41 foreign research papers which had been published in the Journal of Consulting & Clinical Psychology(JCC) between 1966 and 1986, The Journal of Transpersonal Psychology(JTP) between 1967 and 1987, and The Journal of Counseling Psychology (JCP) between 1965 and 1994. The analysis of the studies focused on the concept of meditation, the type of study design, type of research subjects, type of meditation, the results of study, and the applied type of counseling and psychotherapy. The results of the study are summarized as follows : (1) When the study designs were analyzed six categories were identified (Literature reviews, Experiments, Surveys, Comparative study, Qualitative study, Others), and the majority of the studies were found to be Literature reviews (36.6%), or Experimental studies(39%), The number of studies on meditation has increased since the 1970's. (2) Most studies approached meditation with Zen and Yoga(72.5%) which were called concepts of Indian meditation from 1970's to the later of 1980's. TM(Transcendental Meditation) was used in the 1970's. (3) On the type of meditation, most studies used Zen meditation which was called a method of Buddhistic meditation(43.9%). (4) On the studies of meditation effect, most were about psychological changes(48.5%), and psychological changes and physiological changes(37.1%). (5) On the types of the study subjects it was found that 15 studies dealt with literature, nine studies investigated college students, and eight studies investigated the meditator. (6) Most of study showed the results of the meditation effect to be positive (80%). On the basis of the above findings the following recommendations are made : (1) It's necessary to do a reliable and variable analysis of research trends on meditation. (2) There is a need to study the effects of meditation in order to clarify meditation application in counseling.

  • PDF