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The examination of the relationship between exercise addiction and performance enhancement in elite athletes
Çetin, Ebru; Bulgay, Celal; Demir, Gönül Tekkurşun; Cicioğlu, Halil İbrahim; Bayraktar, Işık; Orhan, Özlem (Springer, 2020)This study aimed to investigate the relationship between exercise addiction level and performance enhancement in elite athletes. Seventy-four athletes participated in the study. The participants were asked to present their ... -
Examining students’ mathematical understanding of patterns by pirie-kieren model
Güner, Pınar; Uygun, Tuğba (2020)The purpose of this study is to investigate students’ mathematical understanding of patterns. Three 7th grade students who enrolled in a public school solved the questions regarding the patterns. Semi-structured interviews ... -
Examining the relationship between organizational commitment and turnover intention via a meta-analysis
Güzeller, Cem Oktay; Çeliker, Nuri (Emerald Group Publishing Ltd, 2019)Purpose The purpose of this study is expected to reveal the relationship between organizational commitment and turnover intention in the tourism and hospitality literature with more generalizable results, and thus, provide ... -
Experimental and numerical investigation of the effects of vortex finder geometry on cyclone performance
Karadeniz, Aykut; Ayvaz, Coşkun; Demir, Selami; Aksel, Murat; Saral, Arslan (Yildiz Technical Univ, 2020)In this study, nine different vortex finders (VFs) were used for investigations on cyclone pressure drop and particle collection efficiency. The collection efficiencies dropped for larger and smaller vortex finder dimension ... -
Experimental and statistical analysis of carbon fiber/epoxy composites interleaved with nylon 6,6 nonwoven fabric interlayers
Beylergil, Bertan; Tanoğlu, Metin; Aktaş, Engin (Sage Publications Ltd, 2020)Thermoplastic interleaving is a promising technique to improve delamination resistance of laminated composites. In this study, plain-weave carbon fiber/epoxy composites were interleaved with nylon 6,6 nonwoven fabrics with ... -
Experimental failure analysis and mechanical performance evaluation of fiber-metal sandwich laminates interleaved with polyamide-6,6 interlayers through the combined usage of acoustic emission, thermography and microscopy techniques
Beylergil, Bertan; Tabrizi, İsa E.; Zanjani, Jamal S. M.; Saeidiharzand, Shaghayegh; Poudeh, Leila H.; Yıldız, Mehmet (Sage Publications Ltd, 2020)Fiber-metal laminates are hybrid sandwich composite structures made of thin metallic sheets and layers of fiber-reinforced plastics. In this study, for the first time, the effects of polyamide 66 nonwoven interlayers on ... -
Experimental investigation on mechanical properties of Multi Wall Carbon Nanotubes (MWCNT) reinforced aluminium metal matrix composites
Topçu, İsmail; Ceylan, Muhammet; Yılmaz, Elif Burcu (Korean Assoc Crystal Growth, Inc, 2020)The aim of this research is to obtain better micrographs and to perform the mechanical characterization of Multi Wall Carbon Nanotubes (MWCNT) consolidated aluminum matrix composite (AMC). This research is focused on the ... -
Factors affecting the quality performance of companies
Bolatan, Gülin İdil Sönmeztürk; Beşkese, Ahmet; Gözlü, Sıtkı (Istanbul Univ, 2017)Due to intense competition of contemporary business life, companies need to achieve significant quality performance for survival. Considering this fact, this study aims to define the factors affecting the quality performance ... -
Failure analysis of a welded steel pipe at Kullar fault crossing
Kaya, Ercan Şerif; Uçkan, Eren; O'Rourke, Michael J.; Karamanos, Spyros A.; Akbaş, Bülent; Çakır, Ferit; Cheng, Yin (Pergamon-Elsevier Science Ltd, 2017)The seismic response of a 2200-mm-diameter welded steel pipe at strike slip Kullar fault crossing in Izmit, Kocaeli during 1999 Kocaeli earthquake is investigated. The pipe was crossing the fault-line with an angle of 55 ... -
Falling dynamics of SARS-CoV-2 as a function of respiratory droplet size and human height
Aydın, Mehmet; Evrendilek, Fatih; Savaş, Seçkin Aydın; Aydın, İsmail Erkan; Evrendilek, Deniz Eren (Springer Heidelberg, 2020)Purpose The purpose of this study is to quantify the motion dynamics of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Methods Three physical models of Newton's and Stokes's laws with(out) air resistance ... -
FDG-PET scanning shows distributed changes in cortical activity associated with visual hallucinations in eye disease
Hanoğlu, Lütfü; Yıldız, Sultan; Çakır, Tansel; Hanoğlu, Taha; Yuluğ, Burak (Bentham Science Publ Ltd, 2019)Background and Objective: Charles Bonnet Syndrome (CBS) has been defined as complex visual hallucinations (CVH) due to visual loss. The underlying mechanism of CBS is not clear and the underlying pathophysiology of the ... -
Financial development and economic growth: A panel causality analysis for OECD countries
Ağazade, Seymur; Karakaya, Aykut (Mehmet Akif Ersoy Univ, 2019)The relationship between financial development and economic growth is expressed by different hypotheses. Demand pressure which is caused by increased income as a conclusion of growth may lead to the financial development. ... -
Finite difference approximations of multidimensional convection-diffusion-reaction problems with small diffusion on a special grid
Kaya, Adem; Şendur, Ali (Academic Press Inc Elsevier Science, 2015)A numerical scheme for the convection-diffusion-reaction (CDR) problems is studied herein. We propose a finite difference method on a special grid for solving CDR problems particularly designed to treat the most interesting ... -
Food additives and microbiota
The use of food additives in food production is inevitable in this modern world. Although only a safe amount of food additives is approved, their safety has always been questioned. To our knowledge, the effects of food ... -
Foveal avascular zone and vessel density in children with attention deficit hyperactivity disorder
Tarakçıoğlu, Hatice Nur; Yılmaz, Semra; Kara, Tayfun; Yıldız, Ayşegül Mavi; Yiğit, Ulviye; Özkaya, Abdullah (Springer, 2020)Purpose To compare the retinal and choroidal microvasculature quantitatively via optical coherence angiography (OCTA) in children with attention deficit hyperactivity disorder (ADHD) who were under methylphenidate (MFD) ... -
Fracture toughness enhancement of yttria-stabilized tetragonal zirconia polycrystalline ceramics through magnesia-partially stabilized zirconia addition
Söylemez, Bilal; Şener, Ercan; Yurdakul, Arife; Yurdakul, Hilmi (Vietnam Natl Univ, 2020)In this work, for the first time, we report a novel method on the fracture toughness enhancement of 3 mol % yttria-stabilized tetragonal zirconia polycrystalline (3Y-TZP) ceramics through the incorporation of 8 mol % ... -
Fuel cell electrochemistry
Ünal, Fatma Aydın; Burhan, Hakan; Karaman, Neslihan; Arıkan, Kubilay; Şimşek, Bahar; Akyıldız, Burcu; Şen, Fatih (Materials Research Forum Llc, 2019)Fuel cells can be defined as devices which convert chemical energy into electrical energy. They have a potential capability for promising energy systems. Especially, as a clean and renewable energy source, fuel cells have ... -
Fuzzy correlation and fuzzy non-linear regression analysis
Başaran, Murat Alper; Simonetti, Biagio; D'Ambra, Luigi (Springer Int Publishing Ag, 2016)In this chapter, we will deal with fuzzy correlation and fuzzy non-linear regression analyses. Both correlation and regression analyses that are useful and widely employed statistical tools have been redefined in the ... -
General belongingness and basic psychological needs as predictors of self-esteem in adolescents
Demirtaş, Ayşe Sibel; Yıldız, Mehmet Ali; Baytemir, Kemal (Petroleum-Gas Univ Ploiesti, 2017)The aim of this study is to investigate the effects of general belongingness and basic psychological needs on self-esteem in adolescents. The study group was composed of 161 female and 102 male students - 263 in total - ... -
Generalization of Mellin derivative and its applications
Kargın, Levent; Corcino, Roberto B. (Taylor & Francis Ltd, 2016)In this paper we define generalized exponential polynomials by means of the generalization of the Mellin derivative (xD). We give different proofs for some known results and obtain a new recurrence relation and a new ...