• 제목/요약/키워드: multiple regression technique

검색결과 278건 처리시간 0.027초

임해매립지 조경수목의 생리적 특성과 식재수목의 고사율 (Physiological Characteristics and Death Rate of Planted Trees in Reclaimed Seaside Areas)

  • 박현수;이상석;이상철
    • 한국조경학회지
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    • 제31권2호
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    • pp.94-101
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    • 2003
  • The purpose of this paper is to analyze the correlation between Death Rate of Trees (DRT) and the Physiological Characteristics of Trees(PCT) in POSCO Gwangyang works, which is a reclaimed area. To analyze the DRT, 15 species of deciduous trees were selected, for example Ulmus davidiana var., Zelkova serrata, Melia azedarach var. etc. Though there were numerous factors to affect the growing of trees, 5 PCT were considered to be main factors, soil salt tolerance, wind salt tolerance, water needs, transplanting difficulty, and nutrient needs. According to two kinds of soil-base: mound and pot area, we tested the relationship between 5 PCT and DRT by use of t-test and multiple regression analysis. The results are as follows. 1. The DRT of Acer palmatum, Cornus kousa, Magnolia kobus, Liriodendron tulipifera, and Albizzia julibrissin were high by more than 20%. On the other hand, Chionanthus retusa, Ulmus davidiana var. japonica Celtis sinensis, and Lagerstroemia indica were low by less than 10% in the DRT and are considered to be species suitable for planting in reclaimed areas. 2. The DRT of trees in pot areas was meaningfully higher than in mound areas; for this reason the mound technique is desirable as a soil-base for planting in reclaimed areas. 3. In the pot area, the independent variables, in the order of soil salt tolerance, wind salt tolerance, transplanting difficulty, had an effect on the DRT more significantly than in mount area. On the other hand, wind salt tolerance and soil salt tolerance affected the DRT in mount areas. This means that soil salt tolerance, wind salt tolerance, and transplanting difficulty have to be considered as significant factors to the DRT. Although the researchers tried to interpret how the PCT affected the DRT in order to analyze the relationship between the two in reclaimed areas, it was neglected at an experimental level. Therefore, future research should work on this aspect in detail.

마을단위 보건요원의 활동이 사업 성과에 미치는 영향 -강화지역사회 보건시범사업지역에서- (The Influence of Family Health Workers' Activities on Health Program Performance -Evaluative Research in the The Kang Wha Community Health Demonstration Project-)

  • 서경
    • Journal of Preventive Medicine and Public Health
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    • 제11권1호
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    • pp.24-30
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    • 1978
  • This study was designed to analyse effects of Family Health Workers' activities on the performance of a child immunization program as part of the evaluative research in the community health demonstration project in Kang Wha. Frequent shortcomings of evaluative research are problems in setting evaluative indices, difficulties in interpreting influences of socioeconomic changes due to lack of control and failure of demonstrating association between activity input and program performance. Specific objectives of this study was to improve the frequent shortcoming of evaluative research by isolating the effects of Family Health Workers' activities on the performance of the program through controlling other variables which also influenced the program performance. The target population consisted of 1240 children who were born between Jan. 1971 and Dec. 1975 in Sunwon Myun, and Naega Myun in Kwang Wha Gun, Kyonggi Province. The data were collected in part through 20 Family Health Workers who interviewed the mothers of these children in their villages during Nov. 1977. Part of the data were obtained by summarizing Family Health Workers daily activity records. All data were grouped for each birth cohort according to the 20 villages. Dependent variable of the model is the measle immuinization rate of each village and the independent variables are characteristics of baby, mother, household, travel time to the health subcenter, to Kang Wha Town, and the mean member of visits to the household by Family Health Workers as well as their other related activities and the year of birth of children according to village. The model was analysed by stepwise multiple regression technique. The summarized results show that overall $R^2$ were 39.3% and mean number of Family Health Worker household visits, mean age of mother and mean economic status were significant variables in explaining the immunization rate. Therefore Family Health Workers' activities are one of the significant variables in influencing the increased immunization rate of children in villages of the project area.

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일부 지역 노인의 건강증진 생활양식에 관한 연구 (The Study on Health Promoting Lifestyle of the Elderly)

  • 최연희;김연화
    • 보건교육건강증진학회지
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    • 제18권3호
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    • pp.103-115
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    • 2001
  • This study was done describe health promoting lifestyle and to determine affecting factors in elderly based on the health promoting behaviors. The specific purpose of this study was to examine the relationships of life satisfaction, self-esteem and the demographic characteristics to health promoting lifestyle and to determine causal factors affecting the elderly. The subjects were a volunteer sample of 200 elderly in Kyungsan city. The instruments for this study were Health Promoting Lifestyle Profile(47 items), Life Satisfaction Scale(20 items) and Self-Esteem Scale(10 items). Frequency, percentage, t-test, ANOV A, Pearson's correlation coefficient and stepwise multiple regression technique with SAS program were used to analyze the data. The results of the study are as follows; 1) The average item score for the health promoting lifestyle was 3.3; the highest score on the sub scale was self-actualization(M=3.5) with the lowest being exercise(M=2.9) 2) Health promoting lifestyle was significantly different according to marital status and religion. 3) All of the subscales on health promoting lifestyle were positively related to life satisfaction(r=0.534, p〈0.001 and self-esteem(r=0.608, p〈0.001). The life satisfaction was positively related to self-esteem(r=0.593, p〈0.001). 4) Life satisfaction, self-esteem and marital status explained 28.04% of the variance for the total health promoting lifestyle. The results of this study show that life satisfaction, self-esteem and marital status predicted the health promoting lifestyle of the elderly. So health promoting programs that increase life satisfaction and self-esteem should be developed to promote a healthy lifestyle of the elderly.

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건강증진모델의 검증을 위한 일연구 (Test of the Health Promotion Model)

  • 임난영
    • 한국보건간호학회지
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    • 제4권2호
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    • pp.25-34
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    • 1990
  • The Purpose of this study were 1) to find out the characteristics of health promoting Ii festyles of the study samples, 2) to determine the relationships of physical health and mental health, 3) to determine the relationships of health promoting lifestyles and health status. The health promotion model was tested with a volunteer sample of 141 female students in a university in Seoul. The health promoting lifestyle was measured by the scales developed by Walker and Pender(1987). Health status was measured by Cornell medical Index. Pearson's product moment correlations and stepwise multiple regression technique were used to analyze the data. The results are summarized as follows; 1. The items with the highest frequency of the subscales of health promoting lifestyle were 'look forward to the future' $(133,\;95.0\%)$ in self actualization, 'Enjoy being touched and touching people close to me' $(122,\; 87.14\%)$ in relationships with others. The strongest correlation was between general competence In self care and nutritional practice(r=5388, P<. 0001). 2. Fatigability, frequency of illness, miscellaneous diseases, habit, mood and feeling patterns were predictive of mental health. 3. Total health promoting lifestyles explained $14\%$ of the variance for health status. Relationships with others explained $20.9\%$ of the variance for health status. In conclusion, because the most variance explained was $420.9\%$, there must be other variables not accounted for by the model. that influence health promoting behaviors. Psychological factors accounted for more variance than other factors. Intervention studies focused on psychological factors as a means of altering behaviors have great potential for the design of interventions to increase health promoting behaviors. Further testing of the model with this population should be done.

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대학생들의 전공선택동기가 진로의사결정에 미치는 영향 -진로자기효능감을 매개효과로 (The Impact of the Motives of College Students for Choosing Majors on Career Decision-Making -Using Self-efficacy as a Mediation Effect)

  • 김숙자
    • 한국정보전자통신기술학회논문지
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    • 제11권3호
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    • pp.221-228
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    • 2018
  • 본 연구는 대학생들의 전공선택동기가 진로의사결정에 미치는 영향에 대하여 진로자기효능감을 매개효과로 분석하여 대학생의 진로지도 관련 자료로 활용하고자 한다. 연구대상은 G도에 소재한 4년제 일반대학 5개교 대학생 2, 3, 4학년 1,300명을 비무선적으로 편의표집 하여, 2017년 11월 1일부터 11월 30일까지 설문조사를 실시하였다. 분석방법은 빈도분석, 다중회귀분석, 3단계 매개효과 분석을 하였다. 연구결과 첫째, 전공선택동기는 진로의사결정에 영향을 미치는 것으로 나타났다. 둘째, 전공선택동기가 진로의사결정에 미치는 영향에 대한 진로자기효능감은 부분매개효과를 보이는 것으로 나타났다. 본 연구는 대학생들의 진로지도를 위한 교육의 기초자료가 될 것이다.

영아기 자녀를 둔 어머니의 양육방식 및 양육스트레스가 기본생활습관에 미치는 영향 (The Effects of Mother's Parenting Style and Parenting Stress on Infant's Basic Daily Life Habits)

  • 한영숙
    • 한국콘텐츠학회논문지
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    • 제20권5호
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    • pp.398-409
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    • 2020
  • 본 연구는 어머니의 양육방식 및 양육스트레스가 영아의 기본생활습관에 미치는 영향력을 분석하는 데 그 목적이 있다. 연구대상은 영아와 그들의 부모 155명이다. 기술통계, 상관관계분석, 중다회귀분석으로 자료를 분석하였다. 그 결과 어머니의 온정·격려, 한계설정 양육방식은 기본생활습관에 긍정적인 영향을 미치고 있지만 과보호·허용, 거부·방임 양육방식은 기본생활습관 형성에 부정적인 영향을 미치는 것으로 나타났다. 또한 어머니의 양육스트레스는 수면습관과 식습관에 부정적인 영향을 미치는 것으로 나타났다. 이에 본 연구는 어머니의 양육변인인 양육방식과 양육스트레스가 영아기 기본생활습관에 미치는 영향을 분석하여 영아기 사회화 및 사회적 발달과 관련된 기초자료를 제시하는데 의의를 갖는다.

Phenylvinylsulfone 유도체의 제초활성 (Herbicidal Activities of Phenylvinylsulfone Derivatives)

  • 유성재;전동주;김대황;성낙도
    • Applied Biological Chemistry
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    • 제38권1호
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    • pp.90-94
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    • 1995
  • 벼(Oryza sativa L.)를 위시하여 논잡초인 피(Echinochloa crus-galli)와 물달개비(Monochoria vaginalis Presl)에 대한 phenylvinylsulfone유도체(S)들의 제초활성을 측정 한 바, 발아 전후에 벼(Oryza sativa L.)이외의 잡초에 대하여 현저하게 속효성이고 선택적인 제초활성을 나타내었다. (S)의 phenyl기에 X-치환기가 변화함에 따른, 구조와 제초활성과의 관계(SAR)를 양자 약리학적 방법으로 분석한 바, 피의 경우에는 ${\pi}$상수가 클수록(${\pi}$<0) 그리고 LUMO가 음의 값으로 증가할수록 제초활성이 증가 하였다. 한편, 물달개비의 경우에는 ${\pi}$상수의 적정값(optimal value)이 1.10이었으므로 이 값에 가까울수록 제초활성이 클 것이며 HOMO에 의존적임을 알 수 있었다. 따라서 X-치환기로 전자끌게가 치환됨으로써 ${\pi}$상수가 크고(${\pi}$<01.10) 음의 값으로 HOMO와 LUMO가 클수록 고활성을 나타낼 수 있는 화합물의 조건들에 대하여 검토되었으며 실험사실을 합리적으로 설명할 수 있는 제초활성 작용기작(mode of action)을 가정 하였다.

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Risk factors for Opisthorchis viverrini Infection in Nong Khai Province, Thailand

  • Chudthaisong, Nittaya;Promthet, Supannee;Bradshaw, Peter
    • Asian Pacific Journal of Cancer Prevention
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    • 제16권11호
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    • pp.4593-4596
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    • 2015
  • Background: Opisthorchis viverrini (OV) infection is the main risk factor for cholangiocarcinoma and is often found in Northeastern Thailand. The prevalence of OV infection and the incidence of cholangiocarcinoma are major public health problems in this region. Objectives: The objectives of this study were to identify factors associated with OV infection among people in Nong Khai Province in order to develop a prevention programme in the community. Materials and Methods: The data were collected in July 2013. Stool specimens were examined for intestinal parasites within hours after collection using a normal saline wet preparation and the modified Kato-Katz technique. A case-control study was conducted to collect information about demographic data, the habit of eating unsafely prepared fish, the safe disposal of waste food, and the practice of defaecating in fields. Structured questionnaires were used to interview 351 participants (117 cases and 234 controls) in a random selection of 30 villages across Nong Khai Province. Multiple logistic regression was used to identify risk factors for OV infection. Results: In the multivariate analysis, the results showed that the factors which had a statistically significant association with OV infection were the habit of consuming unsafely prepared fish ($OR_{adj}=5.17$, 95%CI=2.49-10.74), the similar habit of family members ($OR_{adj}=3.25$, 95%CI=1.63-6.49), a history of O. viverrini infection ($OR_{adj}=5.64$, 95%CI=2.10-15.18), a history of taking praziquantel ($OR_{adj}=5.66$, 95%CI=3.11-10.29), and the unsafe disposal of waste food ($OR_{adj}=2.1$, 95%CI=1.10-3.80). Conclusions: The findings of this study highlight the features on which a community programme should focus in order to reduce the prevalence of opisthorchiasis and incidence of bile duct cancer.

일 지역 갱년기 여성의 건강증진생활양식에 관한 연구 (A Study on Health Promoting Lifestyle among Climacteric Women)

  • 송애리
    • 한국간호교육학회지
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    • 제5권2호
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    • pp.315-331
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    • 1999
  • This study was done to describe health promoting lifestyle and to identify the factors affecting the performance in health promoting lifestyle among the climacteric women. The subjects of this study were 240 women(40 to 60 years old) The sample data were collected using a purposive sampling method, and collected from August 23 to September 6, 1999. The instruments for his study were a health promoting lifestyle scale, a health locus of control scale, a self-esteem scale and a perceived health status questionnaire. Frequency, percentage, t-test, ANOVA, Pearson's correlation and stepwise multiple regression technique with SPSS program were used to analyze the data. The results of the study were as follows ; 1) The average score of performance in the health-promoting lifestyle variables was 166.40. The variable with the highest degree of performance was the sanitary environment , whereas the one with the lowest degree was the professional health maintenance. 2) Performance in the health-promoting lifestyle was positively related to self-esteem, internal health locus of control and negatively related to accidental health locus of control and perceived health status. 3) A significant difference between educational level and health-promoting lifestyle were found. 4) Self-esteem and perceived health status explained 21.0% of the variance for the total health promoting lifestyle. The results of this study show that self-esteem, perceived health status predicted the health promoting lifestyle of the climacteric women. Therefore, health promoting programs that increase self-esteem and perceived health status should be developed to promote a healthy lifestyle of the climacteric women, especially those who have a low level of education.

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주부의 여가활동과 여가제약요인에 관한 연구 (A Study on the Leisure Activities and Their Constraints of Housewives)

  • 홍성희
    • 대한가정학회지
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    • 제29권3호
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    • pp.153-174
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    • 1991
  • The purpose of this study is to examine the leisure activities of housewives, to identify the factors that influence leisure activities, and to explore the factors contribute to their life satisfaction. So, this study analyses the effects of econo-demographic and socio-cultural variables and of leisure constraint factors on the leisure activities of housewives. And it deals with how these variables and the leisure activities influence life satisfaction of housewives. For these puoposes, 508 housewives residing in Seoul & Daegu were selected for interviews. For data analysis such statistical methods as ANOVA, t-test, Pearson's correlation, adn Multiple Regression Analysis can be summarised. The main findings of the research are as follows: 1. Leisure acivities are classified in Self-developmental, Home-oriented, Time-consuming, Social and Children-concerned types by the technique of factor analysis. The average particiation level was high in Time-consuming type, but low in Self-developmental type. 2. The participation level of leisure activities shows significant differences by selected variables: The Self-developmental type shows significant differences by housewife's education level, income, husband's occupation, role orientation, home management type and leisure constraints. And Children-concerned type was differed to number of family nember, number of children, age of housewife and age of housewife and age of the youngst child. 3. The preference level of leisure activities differ by housewife's education level, income, husband's occupation, home management type and leisure constraints in the Self-developmental and the Social type. And the preference level of Home-oriented leisure activities was high in the middle class of income and husband's occupation. 4. The preference and participation level of leisure activities show differences. And the variables affecting the differences were housewife's age, education level, home management type, role orientation, leisure constraint factors in the Self-developmental type, and were demographic variables such as number of family member, housewife's age in the Home-oriented type. 5. The variables which affected the level of life satisfaction independently were leisure space, income, the participation level of the Self-developmental and the Social type and the preference level of the Self-developmental type.

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