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On the classification of scalar evolution equations with non-constant separant 

Bilge, Ayşe Hümeyra; Mizrahi, Eti (IOP Publishing Ltd, 2017)
The ` separant' of the evolution equation u(t) = F where F is some differentiable function of the derivatives of u up to order m is the partial derivative partial derivative F/partial derivative u(m) where um u(m) = partial ...
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The critical point of a sigmoidal curve 

Bilge, Ayşe Hümeyra; Özdemir, Yunus (Babeș-Bolyai University, 2020)
Let y(t) be a monotone increasing curve with lim(t ->+/-infinity) y((n))(t) = 0 for all n and let t(n) be the location of the global extremum of the nth derivative y((n))(t). Under certain assumptions on the Fourier and ...
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An Overview of the 2009 A(H1N1) Pandemic in Europe: Efficiency of the Vaccination and Healthcare Strategies 

Samanlıoğlu, Funda; Bilge, Ayşe Hümeyra (Hindawi Ltd, 2016)
2009 A(H1N1) data for 13 European countries obtained from the weekly influenza surveillance overview (WISO) reports of European Centre for Disease Prevention and Control (ECDC) in the form of weekly cumulative fatalities ...
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Epidemic models for phase transitions: application to a physical gel 

Bilge, Ayşe Hümeyra; Pekcan, Önder; Kara, Selim; Öǧrenci, Arif Selçuk (Taylor & Francis Ltd, 2017)
Carrageenan gels are characterized by reversible sol-gel and gel-sol transitions under cooling and heating processes and these transitions are approximated by generalized logistic growth curves. We express the transitions ...
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Mathematical models for phase transitions in biogels 

Bilge, Ayşe Hümeyra; Öǧrenci, Arif Selçuk; Pekcan, Önder (World Scientific Publ Co Pte Ltd, 2019-03-30)
It has been shown that reversible and irreversible phase transitions of biogels can be represented by epidemic models. The irreversible chemical sol-gel transitions are modeled by the Susceptible-Exposed-Infected-Removed ...
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Self-duality in higher dimensions 

Bilge, Ayşe Hümeyra; Dereli, Tekin; Koçak, Şahin (IOP Publishing Ltd, 2017)
Let w be a 2-form on a 2n dimensional manifold. In previous work, we called w "strong self-dual, if the eigenvalues of its matrix with respect to an orthonormal frame are equal in absolute value. In a series of papers, we ...
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What Can We Estimate From Fatality and Infectious Case Data Using the Susceptible-Infected-Removed (SIR) Model? A Case Study of Covid-19 Pandemic 

Ahmetolan, Semra; Bilge, Ayşe Hümeyra; Demirci, Ali; Peker-Dobie, Ayşe; Ergönül, Önder (Frontıers Medıa Sa, 2020)
The rapidly spreading Covid-19 that affected almost all countries, was first reported at the end of 2019. As a consequence of its highly infectious nature, countries all over the world have imposed extremely strict measures ...
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Modeling of Wind Effects on Stratified Flows in Open Channels: A Model for the Istanbul Strait (Bosphorus) 

Bilge, Ayşe Hümeyra; Kirkil, Gökhan; Burak, Selmin; İncegül, Metehan (2016)
Stratified flows in open channels arise as a result of density or surface level differences. If the channel is connected to a basin at one or both ends, strong winds originating from the basin cause the "wind setup" effect ...
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On the uniqueness of the octonionic instanton solution on conformally flat 8-manifolds 

Bilge, Ayşe Hümeyra (IOP Publishing Ltd, 2016)
Let M be an 8-manifold and E be an SO(8) bundle on M. In a previous paper [F. Ozdemir and A.H. Bilge, "Self-duality in dimensions 2n > 4: equivalence of various definitions and the derivation of the octonionic instanton ...
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The Fourier Transform of the First Derivative of the Generalized Logistic Growth Curve 

Bilge, Ayşe Hümeyra; Özdemir, Yunus (International journal of advances in engineering and pure sciences (Online), 2020)
The “generalized logistic growth curve” or the “5-point sigmoid” is a typical example for sigmoidal curves without symmetry and it is commonly used for non-linear regression. The “critical point” of a sigmoidal curve is ...
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Bilge, Ayşe Hümeyra (22)
Koçak, Şahin (3)Yücekaya, Ahmet (3)Ahmetolan, Semra (2)Demirci, Ali (2)Dereli, Tekin (2)Ergönül, Önder (2)Mizrahi, Eti (2)Pekcan, Onder (2)Peker-Dobie, Ayşe (2)... View MoreSubjectCOVID-19 (2)Epidemic models (2)Fields (2)Fourier series (2)Gel point (2)Generalized logistic curve (2)runoff coefficient (2)SIR model (2)Time series analysis (2)Anti-commuting linear operators (1)... View MoreDate Issued2020 (5)2017 (4)2016 (3)2021 (3)2015 (2)2019 (2)2011 (1)2012 (1)2013 (1)Has File(s)
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