80 research outputs found
On sharp asymptotic formulas for the Sturm-Liouville operator with a matrix potential
No full textŞeref, Fulya (Dogus Author) -- Veliev, Oktay A. (Dogus Author)In this article we obtain the sharp asymptotic formulas for the eigenvalues and eigenfunctions of the non-self-adjoint operators generated by a system of the Sturm-Liouville equations with Dirichlet and Neumann boundary conditions. Using these asymptotic formulas, we find a condition on the potential for which the root functions of these operators form a Riesz basis
Examining the chaotic structure of electricity consumption
No full textÖzaksoy Sonüstün, Fulya (Dogus Author) -- Conference full title: 34th International Physics Congress on Turkish Physical Society, TPS 2018; Bodrum Municipality - Herodot Culture CenterKonacik-Bodrum; Turkey; 5 September 2018 through 9 September 2018.In this paper we aimed to determine chaotic behavior of electricity consumption in the USA for the period from 1973:1 to 2018:3. For this purpose, nonlinear structure of the model was determined by BDS test. And then, Lyapunov Exponents was employed to specify chaotic behavior of electricity consumption in the USA
Bibliometric Analysis Of Studies Focusing On Critical Thinking İn Early Childhood
No full textResearch on Education and PsychologyThis study aimed to examine studies on critical thinking in early childhood through bibliometric analysis. In the research, 251 studies on the concept of critical thinking were selected according to the inclusion criteria and analyzed with the VOS-viewer program. In the study, co-author, co-reference, co-citation and co-word analysis of the studies on the concept of critical thinking was carried out according to the distribution of the ten most cited authors and publications, years, published sources and countries. According to the results of bibliometric analysis on critical thinking, it was concluded that the birthplace of the subject and the most productive country is the USA. According to the co-author analysis, it was concluded that Daniel and Gagnon were the authors who contributed the most to the subject, Lipman and Kuhn according to the result of co-citation analysis, and Dovigo and Karadağ according to the result of co-citation analysis. In addition, according to co-word analysis, the most recurring keywords in the studies were critical thinking, early childhood education, creativity, early childhood, cognitive development, teacher training, preschool. As a result of the research, it was concluded that the number of studies on critical thinking in early childhood is low and there should be an increase in studies with children as the sample
Non-linear analysis of Post Keynesian Phillips curve in Canada labor market
No full textÖzaksoy, Fulya (Dogus Author)This paper aims to analyze Post-Keynesian Phillips Curve by using non-linear ARDL approach and non-linear Granger causality method for the period from 1957 to 2015 in Canada. This study is differed from other empirical paper by using non-linear ARDL method which determined there is long-run asymmetric relationship between the selected macroeconomic variables for Canada. Canada exhibits bi-directional causality relationship between inflation-unemployment, unemployment-economic growth and inflation-economic growth which refers that the country has flexible labor market
Chaotic effect of coal consumption on economic growth in the USA
No full textÖzaksoy Sonüstün, Fulya (Dogus Author) -- Conference full text: 34th International Physics Congress on Turkish Physical Society, TPS 2018; Bodrum Municipality - Herodot Culture CenterKonacik-Bodrum; Turkey; 5 September 2018 through 9 September 2018.In this study, we attempt to test chaotic behavior of selected the variables and to determine chaotic relation between economic growth and coal consumption for the period from January, 1973 to March, 2018 in the USA by using Largest Lyapunov Exponents, Chaotic Causality perspectives. In this regard, firstly, it is aimed to identify nonlinear pattern of economic growth and coal consumption by BDS test. And secondly, it is purposed to determine chaotic behaviour of the analyzed series by Lyapunov Exponent. Further, chaotic causality is analyzed for this period. The analysis results demonstrate that coal consumption fluctuations have crucial effects on the USA's economic growth in the long term
Türkiye’de Yaşlı Bakım Kurumlarına Dair Bir Değerlendirme
No full textYalılı, Ayşe (Arel Author), Dönmez, Çiğdem Fulya (Arel Author), Kaptan, Gülten (Arel Author)Yaşlanma kavramsal olarak düşünülmedikçe anlaşılması güç bir kavram olup, intrauterin hayatla başlayıp ve ölümle sona ermektedir. Gün geçtikçe artmakta olan yaşlı nüfusta, yaşla birlikte bireyin psikolojik ve fizyolojik yetilerinin azalması, kronik rahatsızlıkların artması gibi birçok sorunda yaşanmaktadır. Bakım gereksinimi olan 65 yaş üstü bireyler kurumlarda ya da evlerde yaşamlarını sürdürmektedirler. Sürdürülen bu yaşamın aktif yaşlanmayı destekleyen yapıda olması önemlidir. Artan yaşlı nüfus ve bu nüfusun bakım gereksinimlerine karşın Türkiye de bu gereksinimi karşılayacak, yaşlıya hizmet kurumları ile yaşlı sağlığı, bakımı, tedavisi ve rehabilitasyonu alanlarında yetişmiş profesyonellerin sayısı çok yetersizdir. Bu derleme yaşlı bakım kurumlarının günümüzdeki durumu hakkında bir değerlendirme ortaya koymak amacıyla yapılmıştır
Chaotic structure of oil prices
No full textÖzaksoy Sonüstün, Fulya (Dogus Author) -- Conference full title: 6th International Eurasian Conference on Mathematical Sciences and Applications, IECMSA 2017; Budapest; Hungary; 15 August 2017 through 18 August 2017.The fluctuations in oil prices are very complicated and therefore, it is unable to predict its effects on economies. For modelling complex system of oil prices, linear economic models are not sufficient and efficient tools. Thus, in recent years, economists attached great attention to non-linear structure of oil prices. For analyzing this relationship, GARCH types of models were used in some papers. Distinctively from the other papers, in this study, we aimed to analyze chaotic pattern of oil prices. Thus, it was used the Lyapunov Exponents and Hennon Map to determine chaotic behavior of oil prices for the selected time period
Backward bending structure of Phillips Curve in Japan, France, Turkey and the U.S.A
No full textSonüstün Özaksoy, Fulya (Dogus Author)This work aims to analyse the cointegration and the causality relationship between inflation and unemployment by using nonlinear A.R.D.L. and two popular nonlinear causality tests for the period from 1960 to 2016 in Japan, Turkey, the U.S.A. and from 1970 to 2016 in France. This study complements the previous empirical papers. However, it differs from the existing literature with simultaneous use of nonlinear A.R.D.L. and causality methods. Nonlinear A.R.D.L. determined that there is a long run relationship between inflation and unemployment; between economic growth and unemployment for Japan, France, the U.S.A. and Turkey
Chaotic structure of oil prices, inflation and unemployment
No full textÖzaksoy Sonüstün, Fulya (Dogus Author)This article investigates the chaotic relationship among inflation rate, unemployment rate and oil prices over the period January, 1974-October, 2018 in the USA. This study complements the previous studies on this subject. However, it differs from the existing literature in examination of inflation-unemployment trade-off by a neural network model in which oil prices are considered as an exogenous variable, and in analyzing the chaotic causality relation among the variables by Hristu-Varsakelis and Kyrtsou and Bai nonlinear causality tests. The results first suggested by a class of neural network model, which was the multi-layer perceptron (MLP), pointed out an important relation among the analyzed variables. Accordingly, oil price changes have substantial effect on unemployment and inflation. Following, the empirical findings of Hristu-Varsakelis and Kyrtsou and Bai nonlinear causality tests show that there is a unidirectional chaotic relation from oil price to inflation, from oil price to unemployment and from inflation to unemployment
The Role Of Gut Microbiota In Autism Spectrum Disorder
No full textHuman microbiota are colonies of microorganisms located in different parts of the human body with diverse functions. Healthy gut microbiota comprises differing ratios of microoganisms wholly contributing to metabolic and other molecular reactions in a healthy, functioning body. After the demonstration of the bidirectional interaction between the central nervous system and gut microbiota through neuroendocrine, neuroimmune, and autonomic nervous mechanisms, investigations have been started on the microbiota-gut-brain axis in psychiatric disorders. Autism spectrum disorder (ASD), which is a neurodevelopmental disorder of early childhood, is one of these disorders. Most of such studies were cross-sectional and mainly investigated the bacterial species. Changes in gut microbiota composition and the leaky gut syndrome are some of the hypotheses proposed to explain the core symptoms and gastrointestinal (GI) symptoms of ASD. Probiotics, prebiotics, fecal microbiota transplantation, diet have been proposed as treatment options. However, the role of microbiota in diagnosis, followup, and treatment is not yet clear. The bidirectional interaction between central nervous system and intestinal microbiota makes it difficult to establish the cause-effect relationship. The current data on microbiota may be useful to plan patient-specific treatment in autistic children with GI symptoms. This article aims to review the results of the studies on microbiota in animal models and children and discuss the emerging clinical relationship of ASD and gut microbiota.WoSScopu
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