• Title/Summary/Keyword: The values

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THE EFFECT OF INTERNAL IMPLANT-ABUTMENT CONNECTION AND DIAMETER ON SCREW LOOSENING

  • Ha, Chun-Yeo;Kim, Chang-Whe;Lim, Young-Jun;Jang, Kyung-Soo
    • The Journal of Korean Academy of Prosthodontics
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    • v.43 no.3
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    • pp.379-392
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    • 2005
  • Statement of problem. One of the common problems of dental implant prosthesis is the loosening of the screw that connects each component, and this problem is more common in single implant-supported prostheses with external connection, and in molars. Purpose. The purposes of this study were: (1) to compare the initial abutment screw detorque values of the six different implant-abutment interface designs, (2) to compare the detorque values of the six different implant-abutment interface designs after cyclic loading, (3) to compare the detorque values of regular and wide diameter implants and (4) to compare the initial detorque values with the detorque values after cyclic loading. Material and methods. Six different implant-abutment connection systems were used. The cement retained abutment and titanium screw of each system were assembled and tightened to 32Ncm with digital torque gauge. After 10 minutes, initial detorque values were measured. The custom titanium crown were cemented temporarily and a cyclic sine curve load(20 to 320N, 14Hz) was applied. The detorque values were measured after cyclic loading of one million times by loading machine. One-way ANOVA test, scheffe’s test and Mann-Whitney U test were used. Results. The results were as follows : 1. The initial detorque values of six different implant-abutment connections were not significantly different(p>0.05). 2. The detorque values after one million dynamic cyclic loading were significantly different (p<0.05). 3. The SS-II regular and wide implant both recorded the higher detorque values than other groups after cyclic loading(p<0.05). 4. Of the wide implants, the initial detorque values of Avana Self Tapping Implant, MIS and Tapered Screw Vent, and the detorque values of MIS implant after cyclic loading were higher than their regular counterparts(p<0.05). 5. After cyclic loading, SS-II regular and wide implants showed higher detorque values than before(p<0.05).

Hofstede Cultural Dimension Measuring through World Values Surveys (World Value Surveys를 활용한 Hofstede 문화차원 측정과 활용에 관한 연구)

  • Kang, Mi-Young;Kwon, Jong-Wook
    • Asia-Pacific Journal of Business
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    • v.9 no.2
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    • pp.137-152
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    • 2018
  • Hofstede cultural value model is one of the most influential model for cross-cultural studies to measure national difference. In this study, we examine that Hofstede Cultural Dimensions can be measured by World Value Surveys. Selected WVS questions for 31 measurable countries after Exploratory Factor Analysis(EFA) and Confirmatory Factor Analysis(CFA), approved valid through empirical analysis. It is applicable that Individualism values(IND) has related to 2 questionnaires including life satisfaction, Power Distance values(PDI) to 2 questionnaires about political action(Signing a petition and Joining in boycotts), Masculinity values(MAS) to 2 sexual-role questionnaires like "University is more important for a boy than for a girl", Uncertainty Avoidance values (UAI) to 3 questionnaires about confidence(Parliament, The Political parties and Justice System), Long-Term Oriented values(LTO) to 4 questionnaires including "How proud of nationality" and Indulgence versus Restraints values (IVR)to 2 questionnaires including Feeling of Happiness.

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Development of Method for Deciding Automatically Parameters of Water Quality Simulation Models (수질모형의 매개변수 자동보정 프로그램 개발에 관한 연구)

  • Song, Kwang-Duck;Paik, Do Hyeon;Lee, Yong Woon
    • Journal of Environmental Impact Assessment
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    • v.15 no.2
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    • pp.101-109
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    • 2006
  • Water quality simulation models include the difference between the measured and estimated values as an inevitable consequence because they represent the complicated natural phenomena as simplified mathematical equations. The major reason of the difference occurrence is due to the use of the imprecise values of the model parameters, but the parameter values are currently determined by the try and error method directly performed by humans. However, the use of this method requires many time and endeavor of humans, and generally does not obtain the most suitable parameter values. A method for deciding model parameter values is, therefore, developed in this study. The method minimizes the difference between the measured and estimated values and also distributes uniformly the measured values on the upper and lower sides of the line representing the estimated values. A user interface based on this method is also developed by using the Visual Basic 6.0 of Microsoft, and it can be operated in the environment of Windows 98/2000. In this study, the method for deciding model parameter values is applied for estimating the water quality of the stream Ko-heung. The results of the application show that the method, including its computer program, can effectively obtain the most suitable parameter values and also save many working time in comparison with the existing method directly performed by humans.

A study of the relationship among the social work educations, values and advocacy (사회복지 교육과 사회복지 가치 및 옹호의 관계에 관한 연구)

  • Jeon, Sun-Young
    • 한국사회복지학회:학술대회논문집
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    • 2005.04a
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    • pp.677-702
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    • 2005
  • The purpose of this study is to examine the Korean social workers' level of social work values, advocacy attitude and advocacy intervention, and to verify the relations among social work education, social work advocacy and social work values by examining whether social work education influences social work advocacy and social work values, and whether social work values affect social work advocacy. Further, this study wishes to confirm not only the direct effect that social work education has on social work advocacy, but also how social work education indirectly influences social work advocacy through social work values on the social level as a mediator. The research of this study was conducted on 461 social work practitioners who have obtained either social worker licenses or mental health social worker licenses and are currently working in the field. As survey tools, this study utilized social work advocacy attitude, social work advocacy intervention, outcomes of social work education, social work values, self-esteem and locus of control. Collected data were analyzed by using SPSS/PC+ 11.5 for one-way ANOVA and t-test, Pearson's correlation, reliability analysis, exploratory factor analysis and multiple regression. To sum up the results of the study in terms of the research hypothesis, the research hypothesis was established according to the analysis method of the testing mediation of Baron & Kenny (1986) in order to examine whether social work values on the social level intervene between social work education and social work advocacy. The results of the hypothesis test confirm that social work values on the social level serve as a mediator variable.

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A Study on The Family Values and Marital Satisfaction of Housewives -focused on the Seoul and Andong Area- (가족관계에 대한 가치의식 및 결혼만족도에 관한 연구-서울과 안동지역의 주부를 중 심으로-)

  • Seo, Byung-Sook;Kim, Youn
    • Journal of Families and Better Life
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    • v.1 no.2
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    • pp.127-138
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    • 1983
  • The purpose of this study is to investigate the family values and the factors of satisfying family life. Throughout the study the changes of family values and marital satisfaction were examined. The results of the study are as follows; 1) Whereas the family values of people living in urban community were modernized to a great extent- in position of wife, role of husband and wife, preference between son and daughter, view on filial piety- the family values of people living in rural community were remained its traditional form. Form both areas modernization of family values was found in support of old parent. 2) Both Seoul and Andong showed the significant difference on family values according to subjects' education and age. In Seoul, the socio-economic level was influential factor in determining subjects' family values. 3) Marital satisfaction was found higher among people living in rural community than in people living in urban community. Since its very important not only to the individual but also to the society for a human being to be content in his surrounding , the reestablishment of the housewives family values should be followed so that other family members may approach the modernized family values.

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A Study on the Value Changes for the Korean Women in 1977~1998 -A Content Analysis of Print Ads- (한국여성의 가치관 변화에 관한 연구 -화장품과 의류상품 광고를 중심으로-)

  • 전양진
    • Journal of the Korean Society of Clothing and Textiles
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    • v.25 no.4
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    • pp.773-782
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    • 2001
  • This study was to investigate the value changes in Korean women by analyzing the ads of womens magazines. The contents of ads were classified into two types of values: general and consumption values. The general values, composed of inner-directedness and outer-directrdness, might predict consumer behavior in general. The consumption values, utilitarians and hedonic, were expected to affect the consumer purchasing attitude to a specific product. Factors affecting the cultural values were per capita income and womens social status. Total 2969 illustrated ads with verbal theme from 32 Korean womens magazines were used. The content analysis, chi-square test, logistic regression were done for the analysis. The results showed that inner-directedness was dominant general value in Korean womens culture and increased over time. Younger consumers were more inner-directed than older ones were, and inner-directed values increased with income growth. For the consumption values, utilitarian values were higher than hedonic ones and went up over time. For the product types, utilitarian ads were frequent in cosmetics while hedonic ads were high for apparels. Those results implied that Korean womens culture became more inner-directed with increased income. Also consumption values were likely to differ between product groups. Per capita income was shown to increase inner-directedness while womens social status was to increase outer-directedness.

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Applicability of the HPLC Method for the Estimation of Octanol/water Partition Coefficient to Pesticides of Domestic Use (국내 사용 농약을 대상으로 한 HPLC 방법에 의한 옥탄올/물 분배계수 추정법의 적용성 검토)

  • Kim, Kyun;Kwon, Jin-Wook;Kim, Yong-Hwa
    • Environmental Analysis Health and Toxicology
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    • v.16 no.4
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    • pp.189-196
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    • 2001
  • Octanol/water partition coefficients of 52 chemicals were calculated using RP-HPLC estimation method and predicted by computer program, PCHEM. The result showed relationship between literature values and RP-HPLC observed values (relative coefficient r$^2$=0.916), but the relationship of PCHEM values with literature values was lower than RP-HPLC value (relative coefficient r$^2$=0.795). The average difference in partition coefficient between the RP-HPLC method and flask-shaking method was log Kow=0.54, while the average difference between the values predicted form the computer program and flask- shaking method was log Kow = 0.36 Compared to octanol/water partition coefficients by 3 methods (Flask-shaking, RP-HPLC, computer prediction), the octanol/water partition coefficient values based on the flask-shaking method were very similar to the literature values, while the octanol/water partition coefficient values by RP-HPLC method without to consider the dead time, and computer prediction values did not significantly differ with the literature values.

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A Study on Bayesian p-values

  • Hwnag, Hyungtae;Oh, Heejung
    • Communications for Statistical Applications and Methods
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    • v.9 no.3
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    • pp.725-732
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    • 2002
  • P-values are often perceived as measurements of degree of compatibility between the current data and the hypothesized model. In this paper, a new concept of Bayesian p-values is proposed and studied under the non-informative prior distributions, which can be thought as the Bayesian counterparts of the classical p-values in the sense of using the concept of significance level. The performances of the proposed Bayesian p-values are compared with those of the classical p-values through several examples.

A Study on the Lower Heating Values Forecast of Municipal Solid Wastes with the Heating Values of Physical Components (물리적 조성별 발열량을 이용한 도시고형폐기물 저위발열량 추정에 관한 연구)

  • 여운호
    • Journal of Environmental Health Sciences
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    • v.20 no.3
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    • pp.13-18
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    • 1994
  • Information on the heating values of municipal solid wastes is very important in evaluating the feasibility of incineration and RDF (Refuse Derived Fuel) manufacture. This paper describes the forecasting methods about the lower heating values of municipal solid wastes. The lower heating values are forecast by the heating values of physical components. The municipal solid wastes consist of paper, food wastes, textiles, plastics, wood and rubber (contained leather). These are the physical components of municipal solid wastes.

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Accuracy of linear approximation for fitted values in nonlinear regression

  • Kahng, Myung-Wook
    • Journal of the Korean Data and Information Science Society
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    • v.24 no.1
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    • pp.179-187
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    • 2013
  • Bates and Watts (1981) have discussed the problems of reparameterizing nonlinear models in obtaining accurate linear approximation confidence regions for the parameters. A similar problem exists with computing confidence curves for fitted values or predictions. The statistical behavior of fitted values does not depend on the parameterization. Thus, as long as the intrinsic curvature is small, standard Wald intervals for fitted values are likely to be sufficient. Accuracy of linear approximation for fitted values is investigated using confidence curves.