15 citations · 83 across the 35 of their papers we have counts for
35 papers
A coordinate-free approach to obtaining exact solutions in general relativity: The Newman-Unti-Tamburino solution revisited
Emir Baysazan, Ayse Humeyra Bilge, Tolga Birkandan +1
The Newman-Unti-Tamburino (NUT) solution is characterized as the unique Petrov Type vacuum metric such that the two double principal null directions form an integrable distribu…
A New Susceptible-Infectious (SI) Model With Endemic Equilibrium
Ayse Peker-Dobie, Semra Ahmetolan, Ayse Humeyra Bilge +1
The focus of this article is on the dynamics of a new susceptible-infected model which consists of a susceptible group () and two different infectious groups ( and ).…
What Can We Estimate from Fatality and Infectious Case Data using the Susceptible-Infected-Removed (SIR) model? A case Study of Covid-19 Pandemic
Semra Ahmetolan, Ayse Humeyra Bilge, Ali Demirci +2
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 w…
Matrix Invariants of Finite Metric Spaces
Ayse Humeyra Bilge, Metehan Incegul
Finite metric spaces are characterized by a polyhedral cone defined in terms of the positivity of the distance functions and the triangle inequalities. Their classification is base…
Forecasting Models for Daily Natural Gas Consumption Considering Periodic Variations and Demand Segregation
Ergun Yukseltan, Ahmet Yucekaya, Ayse Humeyra Bilge +1
Due to expensive infrastructure and the difficulties in storage, supply conditions of natural gas are different from those of other traditional energy sources like petroleum or coa…
Unexpected parameter ranges of the 2009 A(H1N1) epidemic for Istanbul and the Netherlands
Ali Demirci, Ayse Peker Dobie, Ayse Humeyra Bilge +1
The data of the 2009 A(H1N1) epidemic in Istanbul, Turkey is unique in terms of the collected data, which include not only the hospitalization but also the fatality information rec…