• 제목/요약/키워드: term age

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농가 유형에 따른 농가부채 분석 (Analysis of Farm Household Debt by Farm Type)

  • 강마야
    • 농촌지도와개발
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    • 제24권1호
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    • pp.63-81
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    • 2017
  • The purpose of this study is to analyze the changes of time series, the use by farm type and the causes of farm household debt. First, the mid and long term changes in farm household debt over the past 50 years have increased. Since 2010, the share of non-agricultural debt has exceeded the share of agricultural debt. Second, as a result of the analysis of the farm household debt use by farm type - full time&part time, farming type, land size, age, family members - there was a difference between the agricultural and the non-agricultural debt according to the type of farm household in a significant level of 1%. Finally, as a result of the cause analysis of the farm household debt, the related non-agricultural expenditure variables and the dummy variable of the manager's age, family member and land size has a common influence on the farm household debt increase.

부모의 성역할 유형 부부간 권력유형과 아버지의 유아기 자녀양육 참여도 (Degree of Fathers Participation of Child-rearing in Relation to Demograpic Variables Parents' sex-role Streotypes and Conjugal Power Structure)

  • 이인숙
    • 가정과삶의질연구
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    • 제11권1호
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    • pp.191-202
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    • 1993
  • The purpose of this study was to investigate the degree of father's participation on child-rearing in relation to parents' sex-role streotypes and conjugal power structure and backg-round factors(children's sex paternal aged and educational level. maternal employment status and family's socio-economic status) The subjects of the study 368 couples who have preschoolers. The main study was conducted from sep. 17 to Oct. 2. 1992 using a set of questionaires which has been revised after a pilot study of 38 couples Statistical method for data analysis were frequencies percentiles means ANOVA Duncan's multiple range test F-Test and Cronbach's a. The results indicated 1) That There were significant differences in the degree of father's participation on child-rearing in term of children's sex parternal age the parents' sex-role streotypes the type of conjugal power structure. 2) that the variables which have significant effects on the degree of father's participation of child-rearing were conjugal power structure mother's sex-role types and father's age.

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플라이애시를 대량 사용한 콘크리트의 특성에 관한 실험적 연구 (An Experimental Study on the Properties of High Volume Fly Ash Concrete)

  • 최세진;장종호;최성우;최희용;박선규;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2000년도 가을 학술발표회논문집(I)
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    • pp.549-554
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    • 2000
  • Generally, it is indicated that concrete using fly ash as a part of cement content has lower early strength, and faster carbonation velocity. To improve these problems and provide useful information for high volume fly ash concrete, the properties of concrete - those include slump, bleeding, setting time, compressive strength and carbonation depth etc. - which contained large amount of fly ash as a part of fine aggregate were investigated experimentally. According to test results, it was found that the compressive strength of the concrete increased in early age as well as in long term age with the increase of the fly ash content. And the carbonation depth of concrete using fly ash as a part of fine aggregate was lower than that of plain concrete(FA 0kg/ $\textrm{m}^3$).

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광물질 혼화재를 혼입한 포장콘크리트의 기초물성 (Fundamental Properties of Pavement Concrete Containing Mineral Admixtures)

  • 이다현;이승태;박광필;정호섭;김성수
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2008년도 추계 학술발표회 제20권2호
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    • pp.621-624
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    • 2008
  • This study deal with the effects of ground granulated blast furnace slag (SG) and silica fume (SF) on the mechanical characteristics of pavement concrete made with ordinary portland cement and regulated set cement. Compressive and flexural strengths as well as unit weight of concretes were monitored. From a result of the study, it was found that the SG was effective for development of flexural strength of concretes, but not for development of compressive strength. However, it must be noted that the present study is limited only to the data by the age of 28 days. More data at long-term age should be accumulated for reliability.

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The Long-Term Effects of Parental Divorce or Separation on Childhood, Adolescent and Adult Psychosocial Health in UK

  • Sohn Byoungduk
    • International Journal of Human Ecology
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    • 제5권2호
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    • pp.51-59
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    • 2004
  • Parents' marital conflicts are often linked to various emotional and behavioural difficulties of their children but rarely known about later adolescent and adult lives. This study was undertaken to examine if serious parental conflict such as divorce and/or separation in childhood was associated with emotional and social performance during later adolescent and adult lives. The research literature on divorce was briefly reviewed. The data was derived from the National Child Development Study (NCDSS 1974/age 16 - 1991/age 33) which followed the lives of 17,500 individuals born on March 3-9, 1958 in England, Scotland and Wales. Regression analyses indicate strong evidence that the experience of parental divorce or separation in childhood negatively affects the child's emotional and social performance in their subsequent life. The higher likelihood of having emotional problems, being less competent at their job, experiencing health/disability problems, being a lone-parent, unemployed, and homeless were strongly associated with parental divorce or separation experienced in childhood. Intervention is desirable to address the concerns influencing socio-psychological performance amongst children who have experienced parental divorce or separation.

크리프가 초기재령 콘크리트의 순간 변형에 미치는 영향 (Effect of Creep on Quasi-Instanteneous Deformation of Early-Age Concrete)

  • 오병환;최성철;박호;신용석
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2003년도 가을 학술발표회 논문집
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    • pp.309-312
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    • 2003
  • Quasi-instanteneously performed creep loading is probably one way to seperate the viscous and the plastic creep from the elastic deformation. For mature concrete no differences seem to exist depending on whether the loading is rapidly applied or not. At early age the plastic deformations probably dominate the deformation. A series of test have been done to measure the quasi-instanteneous deformation in concrete specimens according to loading durations and concrete ages. The present study indicates that even very short-term loading contains creep deformation. As concrete is younger and load duration is longer, the proportion of creep deformation in quasi-instanteneous deformation is increased.

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고로슬래그를 굵은골재로 이용한 콘크리트의 강도특성 (Strength Characteristics of Concrete Containing Blast-Funrnace Slag as Coarse Aggregate)

  • 한상호
    • 콘크리트학회논문집
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    • 제12권5호
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    • pp.59-68
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    • 2000
  • A series of experiments were performed to investigate the strength characteristics of concrete which contain air cooled blast-furnace slag as coarse aggregate. The slag is a by product of GISC. The experimental conditions are varied with three different W/C(45%, 50%, 55%) and the weight of water and S/a are constant. The strength properties of the concrete at 7days, 28days, 90days are examined. Also the same strength properties are examined for the normal concrete which contain river gravel and crushed stone respectively as coarse aggregate. As the comparison results of the strength properties, it was found that the compressive strength development of concrete containing blast-furnace slag is better than that of concrete using river gravel at early age, however this is adversely at long-term age, and the tensile and flexural strength of the concrete were not nearly affected by water-cement ratio.

사춘기 조숙증의 원인 및 치료의 최신지견 (Update in the etiology and treatment of sexual precocity)

  • 박미정
    • Clinical and Experimental Pediatrics
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    • 제49권7호
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    • pp.718-725
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    • 2006
  • The pubertal activation of gonadotrophin releasing hormone(GnRH) requires coordinated changes in excitatory or inhibitory amino acids, growth factors, and a group of transcriptional regulators. The age of onset of puberty is progressing to younger age. Factors affecting early puberty include genetic traits, nutrition(body fat) and exposure to endocrine disrupting chemicals. In rapidly progressing central precocious puberty, gonadotrophin releasing hormone(GnRH) agonists(GnRHa) appear to increase final height if treated early stage. Further large scaled long-term follow-up study of the effects of GnRHa on final height is needed.

Review of Food Science Research in Korea with a Special Emphasis on Funding by Korea Science & Engineering Foundation (KOSEF)

  • Min, Tae-Sun;Park, Kun-Young;Lee, Chan
    • Preventive Nutrition and Food Science
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    • 제10권4호
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    • pp.382-390
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    • 2005
  • This study evaluated trends in research funding and the present status of food science in Korea with a special emphasis on funding by Korea Science and Engineering Foundation (KOSEF). The proportion of research funds allocated to food science has increased every year in agricultural science. The numbers of group-based programs of KOSEF have been increasing since 1980' and the ratio of individual-based programs decreased in . this-field. Researchers in the food science field ranges. from 46 to 50 years of age, with a mean age of 47. Mid- to long-term research master plans will be required to encourage food science research in Korea.

Children's Acquisition of Demonstrative Pronouns in Mandarin Chinese

  • Zhao, Yi-jing
    • 한국언어정보학회:학술대회논문집
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    • 한국언어정보학회 2007년도 정기학술대회
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    • pp.532-541
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    • 2007
  • This paper investigates children's comprehension and production of demonstrative pronouns (DPs), 'zhege' (this) and 'nage' (that), in Mandarin Chinese. Subjects are children of ages three, four, five and six. Based on the results of the present experiment, children's developmental stages and the corresponding age grading are provided. Also, the present study incorporates a physical clue into the experiment. The result suggests that in the acquisition of deixis children rely highly on physical context to work out the meaning distinction. In addition, Piaget's egocentrism hypothesis and H. Clark's marking hypothesis are examined in the study. The result seems to support the egocentrism hypothesis. Subjects under the age of six do fail to shift the deictic center when they and the experimenter have a different perspective. As for the marking hypothesis, the study seems to challenge the hypothesis. The result shows that children actually performed better on the marked term 'zhege' than the unmarked member 'nage'.

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