Yazar "Yazıcı, Berna" için listeleme
-
Analysis of international debt problem using artificial neural networks and statistical methods
Yazıcı, Berna; Memmedli, Memmedaga; Aslanargun, Atilla; Asma, Senay (Springer, 2010)It is known from the scientific researches that artificial neural networks are alternatives of statistical methods such as regression analysis and classification in recent years. Since multi-layer backpropagation neural ... -
The Approach of the Civil Engineering Students to the Advance Technology and Web-Based Course (Part II)
Arslan, Gökhan; Yazıcı, Berna (2003)Great advances in science and technology have rapidly changed the structure of the society as well as the method of business and education in the last decade. Especially Internet has given more power in this variation. ... -
Assessment of Fuel Consumption Using Factorial Experiments, Regression Trees and MARS
Kan Kılınç, Betül; Yazıcı, Berna (World Scientific And Engineering Acad And Soc, 2009)The purpose of this paper is to determine the effects that are significant on the fuel consumption of F-4 aircrafts by using three different statistical methods and compare the results of those different methods. The ... -
Assessment of the Levels of Heavy Metal Pollution in Roadside Soils of Eskisehir, Turkey
Malkoç, Semra; Yazıcı, Berna; Koparal, Ali Savaş (Wiley-Blackwell, 2010)A detailed study was conducted to determine the current status of the heavy metals Cd Cu Cr Fe Hg Mn Ni Pb and Zn in Eskisehir Turkey The 15 different locations (n = 270) studied were specifically selected to identify the ... -
Asymmetric control limits for small samples
Yazıcı, Berna; Kan Kılınç, Betül (Springer, 2009)When designing control charts, it is usually assumed that the measurement in the subgroups are normally distributed. The assumption of normality implies that the control limits for a chart for sample averages will be ... -
Comparison of ARIMA, neural networks and hybrid models in time series: tourist arrival forecasting
Aslanargun, Atilla; Mammadov, Mammadagha; Yazıcı, Berna; Yolacan, Senay (Taylor & Francis LTD, 2007)For time series forecasting, different artificial neural network (ANN) and hybrid models are recommended as alternatives to commonly used autoregressive integrated moving average (ARIMA) models. Recently, combined models ... -
Comparison of confidence intervals for the Behrens-Fisher problem
Sezer, Ahmet; Özkip, Evren; Yazıcı, Berna (Taylor & Francis Inc, 2017)The Behrens-Fisher problem concerns the inferences for the difference between means of two independent normal populations without the assumption of equality of variances. In this article, we compare three approximate ... -
Comparison of goodness-of-fit measures in probit regression model
Yazıcı, Berna; Alpu, özlem; Yang, Yaning (Taylor & Francis Inc, 2007)This article examines several goodness-of-fit measures in the binary probit regression model. Existing pseudo-R-2 measures are reviewed, two modified and one new pseudo-R-2 measure are proposed. For the probit regression ... -
Comparison of regression models in case of non-normality and Heteroscedasticity
Kahvecioğlu, Seray; Yazıcı, Berna (Inst Advanced Science Extension, 2016)In regression analysis, in case of comparing two regression models and coefficients where the distribution of variables in question is not known, generalized p values may be used. The generalized p value is an extended ... -
Comparison of the results of factorial experiments, fractional factorial experiments, regression trees and MARS for fuel consumption data
Kan Kılınç, Betül; Yazıcı, Berna (2010)In this study effects that are significant on the fuel consumption of F-4 aircrafts are analyzed by using different statistical methods and the results of those different methods are compared. The response variable of every ... -
A comparison of various tests of normality
Yazıcı, Berna; Yolacan, Senay (Taylor & Francis LTD, 2007)This article studies twelve different normality tests that are used for assessing the assumption that a sample was drawn from a normally distributed population and compares their powers. The tests in question are chi-square, ... -
Determining the problems of disabled employees: a survey study conducted in Eskisehir, Turkey
Yazıcı, Berna; Şişman, Yener; Kocabaş, Fatma (Routledge Journals, Taylor & Francis LTD, 2011)In this study, disabled people, employed using a policy based quota method, were asked about their working lives by means of a survey. In order to do this, the population was defined as disabled people working for companies ... -
Estimation of clearness index model via CRS, TPRS and mars
Alpu, Özlem; Kan Kılınç, Betül; Yazıcı, Berna (2011)Nonparametric approach is more flexible than parametric approach in assuming that f belongs to a smooth family of functions. Hence, a nonparametric approach does not require an assumption of linearity. Based on our motivating ... -
Estimation of Clearness Index Model Via Crs, Tprs and Mars
Alpu, Özlem; Kan Kılınç, Betül; Yazıcı, Berna (Isoss Publ, 2011)Nonparametric approach is more flexible than parametric approach in assuming that f belongs to a smooth family of functions. Hence, a nonparametric approach does not require an assumption of linearity. Based on our motivating ... -
Examining cronbach alpha, theta, omega reliability coefficients according to the sample size
Ercan, İlker; Yazıcı, Berna; Sigirli, D.; Ediz, B.; Kan, I. (Wayne State University, 2007)Differentiations according to the sample size of different reliability coefficients are examined. It is concluded that the estimates obtained by Cronbach alpha and teta coefficients are not related with the sample size, ... -
Goodness of Fit Measures in Binary Probit Regression Models
Özarıcı, Özlem; Yazıcı, Berna (Anadolu Üniversitesi, 2003)In this study the goodness of fit measures in Probit models for binary outcomes, have been examined. Pseudo-R2 measures and other measures are introduced and a comparison of those different measures is held. The application ... -
The individuals control chart in case of non-normality
Kan Kılınç, Betül; Yazıcı, Berna (2006)This article examines the effects of non-normality as measured by skewness and provides an alternative method of designing individuals control chart with non-normal distributions. A skewness correction method for constructing ... -
The individuals control charts for burr distributed and Weibull distributed data
Kan Kılınç, Betül; Yazıcı, Berna (2006)Constructing the control limits supposes the assumption of the normality. However, there are numerous studies on the control charts when the underlying distribution is non-normal. Several authors have investigated the ... -
Mapping of Heavy Metal Contamination Characteristics Using Ciaprg Methodology
Altan, Metin; Ayyıldız, O.; Malkoc, S.; Yazıcı, Berna; Koparal, Ali Savaş (Corvinus University Budapest, 2016)The aim of this study is to produce a digital contamination map which is interactively rectified with a database, projected and scaled. For this reason, a detailed investigation was conducted for an understanding of ... -
Measurement of internal user satisfaction and acceptance of the e-justice system in Turkey
Oktal, Özlem; Alpu, Özlem; Yazıcı, Berna (Emerald Group Publishing LTD, 2016)Purpose - The purpose of this paper is to develop an evaluation model for National Judiciary Informatics System (NJIS), which is an e-justice system forming part of e-government, based on the models and the theories of ...
