Bi̇r Boyutlu Taşinim Süreçleri̇nde Ölçekleme Anali̇zi̇ Ve Kendi̇ne Benzeşi̇m

Abstract

Convection-diffusion equation has been widely used to model a variety of flow and transport processes in earth sciences, including spread of pollutants in rivers, dispersion of dissolved material in estuaries and coastal waters, flow and transport in porous media, and transport of pollutants in the atmosphere. In this study, the conditions under which one-dimensional convection-diffusion equation becomes self-similar are investigated by utilizing one-parameter Lie group of point scaling transformations. By the numerical simulations, it is shown that the one-dimensional point source transport process in an original domain can be self-similar with that of a scaled domain. In fact, by changing the scaling parameter or the scaling exponents of the length dimension, one can obtain several different down-scaled or up-scaled self-similar domains. The derived scaling relations obtained by the Lie group scaling approach may provide additional understanding of transport phenomena at different space and time scales and may provide additional flexibility in setting up physical models in which one dimensional transport is significant.

The Adaptation of The Successful Aging Inventory: Turkish Validity and Reliability Study

“…For the test-retest analysis, it is recommended that there should be at least two weeks and at most four weeks between the first and second measurements (18,19,27). The test should be performed with at least 30 individuals (17).…”

Psychometric Properties of the Turkish Version of the JHand for the Patient-Oriented Outcome Measure for Patients with Hand and Elbow Disorders

“…The ICC was calculated using the two measurements, conducted with a 1-week interval for test-retest reliability. If the Cronbach α coefficient is higher than 0.70, the internal consistency of the scale is interpreted as sufficient (Ercan & Kan, 2004). In terms of the ICC coefficient, a result greater than or equal to 0.80 is interpreted as excellent reliability, a result between 0.60 and 0.79 indicates moderate reliability, and a result less than 0.60 is interpreted as low reliability (Richman et al, 1980).…”

“…For the confirmatory factor analysis, the multiple fit indices were accepted as reference: chi-square likelihood ratio/degree of freedom (X 2 /df-CMIN/DF; 0 ≤ X 2 /df ≤ 2: good fit, 2 ≤ X 2 /df ≤ 3: acceptable fit), root mean square error of approximation (RMSEA; 0 ≤ RMSEA ≤ 0.05: good fit, 0.05 ≤ RMSEA ≤ 0: acceptable fit), normed fit index (NFI; 0.95 ≤ NFI ≤1.00: good fit, 0.90 ≤ NFI ≤ 0.95: acceptable fit), comparative fit index (CFI; 0.97 ≤ CFI ≤ 1.00: good fit, 0.95 ≤ CFI ≤ 0.97: acceptable fit), goodness of fit index (GFI; 0.95 ≤ GFI ≤ 1.00: good fit, 0.90 ≤ GFI ≤ 0.95: acceptable fit), adjusted goodness of fit index (AGFI; 0.90 ≤ AGFI ≤ 1.00: good fit, 0.85 ≤ AGFI ≤ 0.90: acceptable fit) fit index values (Erkorkmaz et al, 2013). After calculating the total scores obtained from all the scales applied for the criterion validity of the JHand, a comparison method with a previously validated scale was used with Spearman's correlation analysis (Ercan & Kan, 2004). The degree of correlation was interpreted to be a very weak correlation between 0.00-0.19, weak correlation between 0.20-0.39, moderate correlation between 0.40-0.59, strong correlation between 0.60-0.79, and a very strong correlation greater than 0.80 according to the Spearman's correlation coefficient (Evans, 1996).…”

Adaptation of the Toileting Behaviour-Women's Elimination Behaviours Scale into Turkish

“…Eğer bir madde toplam puan ile düşük ilişki gösteriyorsa, güvenilir olmadığı düşünülerek ölçekten çıkarılması önerilir. 26,27 Wang ve Palmer'ın TD-KBD Ölçeği'nin İngilizce versiyonunun geçerlilik ve güvenirliliğini inceledikleri araştırmada, ölçeğin tüm alt gruplarında madde toplam korelasyon katsayısının 0,30'un üzerinde olduğu ve tüm alt gruplarda Cronbach alfa değerinin 0,70-0,88 arasında değiştiği belirtilmiştir. 24 A Ar ra aş şt tı ır rm ma an nı ın n s sı ın nı ır rl lı ıl lı ık kl la ar rı ı: : TD-KBD Ölçeği'ne benzer, tuvalet davranışlarını değerlendirilen diğer ölçekler ile karşılaştırma yapılamamıştır.…”