• 제목/요약/키워드: Independence test

검색결과 370건 처리시간 0.038초

수문학적 가뭄 특성 분석을 위한 독립성 검정 기반의 적정 임계수준 결정 (Determining proper threshold levels for hydrological drought analysis based on independent tests)

  • 김태웅;박지연;신지예
    • 한국수자원학회논문집
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    • 제53권3호
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    • pp.193-200
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    • 2020
  • 수문학적 가뭄은 하천, 저수지, 지하수 등과 같은 가용 수자원의 부족과 직접적으로 연관되어 있어 가뭄에 대한 체감이 기상학적 가뭄에 비하여 크다. 특히, 우리나라의 경우 홍수기에 집중되는 강우 특성으로, 비홍수기에는 댐과 저수지의 저류량에 크게 의존하여 수자원 관리가 이루어지므로 효율적인 수자원 관리를 위해서는 수문학적 가뭄을 분석하는 것이 중요하다. 일반적으로 수문학적 가뭄은 정상보다 낮은 유량이 발생하는 것으로 정의된다. 대부분 수문학적 가뭄을 정량적으로 표현하기 위해 주로 임계수준방법(threshold level method)을 많이 사용한다. 그러나 임계수준방법은 작은 미소가뭄으로 인한 독립성 문제를 야기시킬 수 있다. 본 연구에서는 홍수통제소에서 제공하는 12개 지점의 유량자료를 활용하여 독립성 검정을 실시한 후, 우리나라의 수문학적 가뭄 특성 분석을 위한 적정 임계수준을 제시하였다. 일별 유황곡선을 작성하고 50 ~ 99 백분위수를 적용하여 가뭄사상을 추출하였다. 적정 임계수준 범위를 결정하기 위해 독립성 검정을 실시하였다. 포아송 분포의 독립성 검정결과, 여주시 지점과 평택시 지점을 제외하고 대부분 지점들은 87~99 백분위수 구간이 적정한 것을 나타났으며, 일반 파레토 분포의 독립성 검정결과, 80~90 백분위수 사이가 가장 적절하였으며, 평균 초과도표에서는 80 ~90 백분위수 구간이 가장 많이 나타났다. 본 연구에서는 각 권역별로 적정 임계수준을 제시하기 위하여 권역에 해당하는 지역들의 공통범위를 검토하였다. 그 결과, 한강권역에서는 70~76 백분위수, 낙동강권역은 87~91 백분위수, 금강권역에서는 86~98 백분위수, 영산 및 섬진강권역에서 85~87 백분위수 구간이 적정한 임계수준인 것으로 나타났다.

과학 학습을 위한 개별적인 CAI에서 학생들의 인지적.정의적 특성과 개념 이해도의 관계 (Relationships Between Student Cognitive . Affective Characteristics and Conceptual Understanding from Individual CAl for Science Learning)

  • 노태희;김경순
    • 한국과학교육학회지
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    • 제25권7호
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    • pp.728-735
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    • 2005
  • 이 연구는 학생들의 인지적 정의적 특성과 컴퓨터 보조 수업을 한 후의 개념 이해도와 관계를 조사하였다. 장의존-장독립성, 학습 전략, 자기 조절 능력, 시각적 학습 선호도, 성취 목적, 능력에 대한 자아 효능감, 개념 검사를 실시하였다. 학생들에게 컴퓨터 보조 수업을 실시한 후에 '분자의 운동'에 관한 개념 검사를 하였다. 학생들의 개념 이해도는 인지적 특성들 중에서 장의존-장독립성, 학습 전략, 자기 조절 능력, 정의적 특성 중에서는 시각적 학습 선호도, 성취 목적, 능력에 대한 자아 효능감과 CAl에 대한 태도와 유의미한 상관이 있었다. 개념 이해에 관한 인지적 특성들의 중다 회귀 분석 결과, 장의존-장독립성은 가장 유의미한 예언 변인이었다. 자기 조절 능력과 심층적 학습 전략도 유의미한 예언 변인 이었다. 정의적 특성들에 관한 분석 결과에서는 시각적 학습 선호도, 능력에 대한 자아 효능감이 학생들의 개념 이해에 유의미한 예언 변인이었다.

Integrated Effect of Non-Invasive Neuromodulation on Bladder Capacity in Traumatic Spinal Cord Injury Patient: Single Case Report

  • Priyanka Dangi;Narkeesh Arumugam;Dinesh Suman
    • Physical Therapy Rehabilitation Science
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    • 제13권1호
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    • pp.86-94
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    • 2024
  • Objective: To evaluate the changes in bladder capacity and storage through non-invasive neuromodulation by application of repetitive Trans magnetic stimulation (rTMS) and genital nerve stimulation (GNS) in traumatic spinal cord survivors. Design: A Single Case Study. Method: The Patient was registered in trail with the clinical trial registry of India (CTRI/2022/05/042431). The Patient was interposed with rTMS on lumbar area, from T11-L4 vertebrae with 1 Hz and the intensity was 20% below that elicited local paraspinal muscular contraction for 13 minutes. GNS was placed over dorsum of the penis with the cathode at the base and anode 2 cm distally at 20 Hz, 200 microseconds, Continuous and biphasic current was delivered and amplitude of stimulation necessary to elicit the genito-anal reflex. For assessment, Neurological examination was done for peri-anal sensation (PAS), voluntary anal contraction (VAC) and bulbocavernous reflex (BCR), deep anal pressure (DAP), and American Spinal Injury Association Impairment Scale (ASIA scale). Outcome assessment was done using Urodynamics, Spinal Cord Independence Measure Scale Version-III (SCIM-III), American Spinal Injury Association Impairment Score (ASIA Score), Beck's Depression Inventory Scale (BDI). The baseline evaluation was taken on Day 0 and on Day 30. Results: The pre-and post-data were collected through ASIA score, SCIM-III, BDI and Urodynamics test which showed significant improvement in bladder capacity and storage outcomes in the urodynamics study across the span of 4 weeks. Conclusion: rTMS along with GNS showed improvement in bladder capacity & storage, on sensory-motor score, in functional independence of individual after SCI.

영재와 평재의 인지양식 비교 연구 (A Comparative Study on the Field Independence Cognitive Styles of Gifted and Normal Children)

  • 나귀옥
    • 영재교육연구
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    • 제5권2호
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    • pp.121-138
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    • 1995
  • A group of 84 young children were administered the Preschool embedded Figures Test(PEFT). A three way analysis of variance was performed utilizing giftedness (gifted, normal), gender, and year(4 year-old class, 5 year-old class) as independent variables. The giftedness main effect was statistically significant. Gifted children were more effect not year main effect were statistically significant. The interaction effects between giftedness and gender, between giftedness and year, between gender and year were not significant either.

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SC-IQ의 간이 측정방법 개발 (Development of a Simplified Version of SC-IQ in Korea)

  • 김은미;배상수
    • 보건교육건강증진학회지
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    • 제29권1호
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    • pp.73-87
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    • 2012
  • Objectives: The purpose of this study was to examine the compositional fitness and independence of the original six dimensions and the newly-designed six dimensions of Integrated Questionnaire for the Measurement of Social Capital[SC-IQ], and to explore the more simplified version for convenient use in public health-related social capital studies. Methods: This study reanalyzed social capital items included in a 2004 community health survey of K-city conducted by Hallym Health Services Research Center. Data was collected from 1,000 adults using core questions of SC-IQ. Explanatory factor analyses to all questions were done, and the new six dimensions were established. Confirmatory factor analyses[CFA] were done on the original and new six dimensions. And then reliability and validity test were done. SPSS 15.0 and AMOS 7.0 were used. Results: The final CFA module to the new SC-IQ exhibited Root Mean Square Error of Approximation[RMSEA] 0.028 and only compositional fitness and independence, and was composed of four dimensions and eight questions, and covers all elements of social capital including structural, cognitive, operational, outcome, bonding and bridging elements. Conclusion: This study demonstrates the utility of a new, simplified version of SC-IQ as well as its convenience.

편마비 환자에서 건측 수부의 적극적 미세 운동 제공을 통한 기능적 독립성의 증가에 관한 연구 (The study for Functional Independence Measure score by fine motor exercise of unaffected hand in the hemiplegic patients)

  • 채정병
    • 대한물리치료과학회지
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    • 제6권4호
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    • pp.251-262
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    • 1999
  • This study is designed to evaluate the effects of aggressive fine motor exercise of unaffected hand in the hemiplegic patients. The 36 hemiplegic patients were classified into two groups: The experimental 18, who were treated by aggressive fine motor exercise in unaffected hand and the control, 18, who were treated by conventional exercise program. We evaluate the effects of aggressive fine motor exercise by Functional Independence Measure(FIM) and Jebsen Hand Function Test(JHFT) after 6 weeks program. After exercise program, the experimental group showed score change from $43.05{\pm}15.68$ to $58.05{\pm}17.12$ in FIM score and from $24.12{\pm}22.03$ to $55.44{\pm}21.50$ in Jebsen, and the control showed score change from $51.11{\pm}22.61$ to $57.50{\pm}23.66$ in FIM score and from $40.88{\pm}21.17$ to $52.77{\pm}19.42$ in Jebsen. The experimental group had significantly higher score in FIM and JHFT than that of the control group. The aggressive fine motor exercise is beneficial in unaffected hand in the hemiplegic patients.

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수리 문제,그림 및 문장으로 제시된 개념 문제의 생취도 및 인지변인들 사이의 관계 (The Relationships Among Achievements in Algorithmic Problems, Achievements in Figure-Formatted and Textual-Formatted Conceptual Problems, and Cognitive Variables)

  • 노태희;임희준
    • 한국과학교육학회지
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    • 제16권3호
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    • pp.278-285
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    • 1996
  • High school students' achievements in algorithmic problems, and figure-formatted and textual-formatted conceptual problems concerning stoichiometry, gaseous state, and solution, were measured by the Chemistry Problem Solving Ability Test. The relationships among the achievement scores in the three types of problems and cognitive variables such as logical thinking ability, mental capacity, and field dependence/field independence were examined. The portion of variance of explanation for each achievement score was also studied by a multiple regression analysis. The results showed that logical thinking ability was significantly correlated with the achievement score in the algorithmic problems, and accounted for the significant portion of the variance of the score. Mental capacity accounted for the significant portion of the variance of the score in the figure-formatted conceptual problems. Although field dependence/field independence was significantly correlated with all the achievement scores, it did not significantly account for any scores in multiple regression analyses. However, the magnitudes of correlation coefficients among the achievement scores were higher than those between the achievement scores and cognitive variables. The best predictor for each score was also found to be one of the other achievement scores. Educational implications are discussed.

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학령기 아동의 의복행동 측정도구 개발에 관한 연구 -4, 5, 6학년 아동을 중심으로- (A Study on the Measurement of Clothing Behavior of Elementary School Children)

  • 이명희
    • 한국의류학회지
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    • 제11권2호
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    • pp.1-11
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    • 1987
  • The purpose of this study was to develope a questionaire measuring clothing behavior of elementary school children. At first, after pretest, the clothing behavior questionaire consisted of 70 items which were devidad. into 7 subscales i.e. Clothing interest. Clothing satisfaction. Clothing management, Clothing sex-role. Clothing comfort. Clothing conformity. and Clothing independence. Each item was rated on a 3-point scale. Samples were 447 boys and girls (4 th, 5 th, 6 th grade) of three elementary schools in Seoul. Korea. The data were analyzed by item analysis and factor analysis. Factor analysis was useful in attempting to establish contruct validity. Item validity was examined based on the correlation coefficients and item discriminating power through the chi-square. Reliability was examined based on the Cronbach's Alpha Reliability Coefficient and test-retest method. With this analysis the subscales were reconstructed to following 6 factors. Clothing conformity items were not clustered by the factor analysis. 52 items of 6 factors selected by the analysis. The factors characteristics were as follows: 1. Clothing interest (10 items) 2. Clothing satisfaction (11 items) 3. Clothing management (8 items) 4. Clothing sex-role (12 items) 5. Clothing comfort (6 items) 6. Clothing independence (5 items)

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The Relationship between Work Values and Entrepreneurial Attitudes: Implications for the Distribution Industry

  • Wang, Haikun;Moon, Jaeseung
    • 유통과학연구
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    • 제17권3호
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    • pp.57-67
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    • 2019
  • Purpose - This study aims to examine the impact of work values on entrepreneurial attitudes, and test the moderating effect of entrepreneurial opportunity identification on the above mentioned relationship as well. Research design, data, and methodology - A questionnaire survey was conducted to 258 employees who comes from 8 different types of the enterprises in northwestern of China, and the corresponding research model was verified. Results - The results show that "comfort and security" (one dimension of work values) has a significant negative impact on entrepreneurial attitudes. Another two dimensions of work values, such as "competence and growth" and "status and independence" have a significant positive impact on entrepreneurial attitudes. In addition, entrepreneurial opportunity identification has a significant moderating effect on the relations between work values and entrepreneurial attitudes. Specifically, only the entrepreneurship opportunity identification positively moderates the relationship between status & independence and entrepreneurial attitudes. Conclusions - This research further enriches the relevant theories of organizational behavior and entrepreneurships. This study also has guiding significance and value for management practice, especially for this research results implies, that is, individual's ability to entrepreneurial opportunity identification (e.g., identify feasible distribution channel for potential new venture) is important in entrepreneurship.

The Impact of Internal Audit Quality on Financial Performance of Yemeni Commercial Banks: An Empirical Investigation

  • HAZAEA, Saddam A.;TABASH, Mosab I.;KHATIB, Saleh F.A.;ZHU, Jinyu;AL-KUHALI, Ahmed A.
    • The Journal of Asian Finance, Economics and Business
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    • 제7권11호
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    • pp.867-875
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    • 2020
  • Quality internal audit (IA) plays a crucial role in accountability, transparency and preserving public properties. This paper gives a brief background of the IA system in Yemen and examines its impact with regards to financial performance in Yemeni commercial banks based on five factors: (i) independence of IAs, (ii) adherence to IA standards, (iii) governance principles implementation, (iv) size of the IA, and (v) frequency of internal audits committees' meetings. The primary data for the study were collected through a questionnaire prepared for this purpose. Fifty questionnaires were distributed out of which forty-two were retrieved and valid in the analysis process. For the empirical analysis, descriptive analysis and T-test were used for verification of the research hypotheses. Results revealed that sticking to standards internal audit, internal auditors' independence and quality governance have significant impact on banks' financial performance, while the size of internal audits committees, as well as their meeting, frequently has insignificant positive impact on banks' performance. Moreover, the country results show that the use of automated internal audit in banks has an impact on improving financial performance. This article provides avenues for further studies, mainly in developing countries, including Yemen, in quality internal audit and financial performance.