Browsing by Author "Bilge, Ayşe Hümeyra"
Now showing items 120 of 44

2050 yılına kadar sıfır karbon emisyon hedefi: Türkiye'de %100 temiz elektriğin uygulanabilirliği
Yalçın, Yasemin Yağmur (Kadir Has Üniversitesi, 2021)The aim of this study is to make projections about how much resources Turkey needs to meet its electricity demand within the framework of zero carbon emissions by 2050, and to make evaluations about renewable energy capacity ... 
(3+3+2) warpedlike product manifolds with Spin(7) holonomy
Uğuz, Selman; Bilge, Ayşe Hümeyra (Elsevier Science Bv, 2011)We consider a generalization of eightdimensional multiply warped product manifolds as a special warped product by allowing the fiber metric to be nonblock diagonal. We define this special warped product as a (3 + 3 + 2) ... 
An analysis of price spikes and deviations in the deregulated Turkish power market
Gayretli, Gizem; Yücekaya, Ahmet; Bilge, Ayşe Hümeyra (Elsevier, 2019)The successful operation of a real time market is related to the planning in the day ahead market. We analyze the day ahead and real time market data for the Turkish power market for the period 20122015 to classify price ... 
Application of epidemic models to phase transitions
Bilge, Ayşe Hümeyra; Pekcan, Önder; Gürol, M. V. (Taylor & Francis Ltd, 2012)The SusceptibleInfectedRecovered (SIR) and SusceptibleExposedInfectedRecovered (SEIR) models describe the spread of epidemics in a society. In the typical case, the ratio of the susceptible individuals fall from a ... 
Assessment and simulation of water transfer for the megacity Istanbul
Burak, Selim; Bilge, Ayşe Hümeyra; Ülker, Duygu (Bellwether Publishing, Ltd., 2021)The population of Istanbul increased from three to fifteen million from 1970 to 2018. The city, which has no perennial fresh water resources within its metropolitan boundaries, has long imported water from other basins. ... 
Ayvansaray mahallesinin tarihsel cevre analizi
Kaplan, Furkan (Kadir Has Üniversitesi, 2018)Portfoy sigortasi yatirimcilari piyasa dususlerinden korumak ve piyasa yukselislerinde portfoyun degerini artirmak icin dunya capinda kullanilan bir stratejidir. Sabit oranli portfoy sigortasi da bu konu basligi altina ... 
Bankacılık hisse senetleri üzerine endekse dayalı bir alım satım stratejisi önerisi
Yeniay, Ozan (Kadir Has Üniversitesi, 2017)Batıda uzun zamandır uygulanan, Türkiye'de yeni yeni uygulanmaya başlayan ve her geçen yıl önemini artıran algoritmik alım satım yöntemi yatırımcılara büyük avantajlar sağlamaktadır. Algoritmik alım satım yöntemleri sayesinde ... 
Canonical forms for families of anticommuting diagonalizable linear operators
Kumbasar, Yalcin; Bilge, Ayşe Hümeyra (Elsevier Science Inc, 2012)It is well known that a commuting family of diagonalizable linear operators on a finite dimensional vector space is simultaneously diagonalizable. In this paper we consider a family A = {A(a)} A(a) : V > V a = 1... N of ... 
COMPUTATION OF MONTHLY RUNOFF COEFFICIENTS FOR ISTANBUL
Bilge, Ayşe Hümeyra; Ülker, Duygu; Burak, Selman (VINCA INST NUCLEAR SCI, 2021)Water demand for Istanbul is supplied both by impounded reservoirs located within its provincial boundaries and by water transfer from Western and Eastern regions in peripheral areas, located in SouthWest Black Sea region. ... 
The critical point of a sigmoidal curve
Bilge, Ayşe Hümeyra; Özdemir, Yunus (BabeșBolyai 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 ... 
Determination of epidemic parameters from early phase fatality data: A case study of the 2009 A(H1N1) pandemic in Europe
Bilge, Ayşe Hümeyra; Samanlıoğlu, Funda (World Scientific Publ Co Pte Ltd, 2018)This paper demonstrates that the susceptibleinfectedremoved (SIR) model applied to the early phase of an epidemic can be used to determine epidemic parameters reliably. As a case study the SIR model is applied to the ... 
Determining the critical point of a sigmoidal curve via its fourier transform
Bilge, Ayşe Hümeyra; Özdemir, Yunus (Institute of Physics Publishing, 2016)A sigmoidal curve y(t) is a monotone increasing curve such that all derivatives vanish at infinity. Let tn be the point where the nth derivative of y(t) reaches its global extremum. In the previous work on solgel transition ... 
Epidemic models for phase transitions: application to a physical gel
Bilge, Ayşe Hümeyra; Pekcan, Önder; Kara, Selim; Öğrenci, Arif Selçuk (Taylor & Francis Ltd, 2017)Carrageenan gels are characterized by reversible solgel and gelsol transitions under cooling and heating processes and these transitions are approximated by generalized logistic growth curves. We express the transitions ... 
An equivalence class decomposition of finite metric spaces via Gromov products
Bilge, Ayşe Hümeyra; Çelik, Derya; Koçak, Şahin (Elsevier Science Bv, 2017)Let (X, d) be a finite metric space with elements Pi, i = 1,..., n and with the distance functions d(ij) The Gromov Product of the "triangle" (Pi, Pj, Pk) with vertices Pt, Pj and Pk at the vertex Pi is defined by ... 
Finansal piyasalarda karanlık havuzlar ve optimal stratejiler
Genç Yılmaz, Merve (Kadir Has Üniversitesi, 2016)Karanlık havuzlar, 1980'li yılların son dönemlerinde ortaya çıkmış, öncelikle gelişmiş ülkelerde kullanılmış, finansal piyasalarda yaşanan küreselleşme ile hız kazanarak gelişmekte olan ülkelerde de yeni bir finansal yapı ... 
Forecasting electricity demand for Turkey: Modeling periodic variations and demand segregation
Yükseltan, Ergün; Yücekaya, Ahmet; Bilge, Ayşe Hümeyra (Elsevier, 2017)In deregulated electricity markets the independent system operator (ISO) oversees the power system and manages the supply and demand balancing process. In a typical day the ISO announces the electricity demand forecast for ... 
Forecasting Models For Daily Natural Gas Consumption Considering Periodic Variations And Demand Segregation
Yükseltan, Ergün; Yücekaya, Ahmet; Bilge, Ayşe Hümeyra; Ağca Aktunç, Esra (Elsevier Ltd, 2020)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 coal. To overcome these challenges, supplier ... 
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 “5point sigmoid” is a typical example for sigmoidal curves without symmetry and it is commonly used for nonlinear regression. The “critical point” of a sigmoidal curve is ... 
Futbol kulüpleri hisse senetleri üzerinden portföy oluşturulması ve finansal bir ürün olarak modellenmesi
Bayır, Ali (Kadir Has Üniversitesi, 2019)Bu çalışmada Borsa İstanbul'da işlem gören Beşiktaş, Fenerbahçe, Galatasaray ve Trabzonspor takımlarının hisse senetlerini de içeren modern portföy teorisine uygun bir portföy oluşturulması amaçlanmıştır. Bu çalışma ... 
Gromov product structures, quadrangle structures and split metric spaces
Bilge, Ayşe Hümeyra; Çelik, Derya; Koçak, Şahin; Rezaeinazhad, Arash Mohammadian (Elsevier B.V., 202106)Let (X,d) be a finite metric space with elements Pi, i=1,…,n and with distances dij≔d(Pi,Pj) for i,j=1,…,n. The “Gromov product” Δijk, is defined as [Formula presented]. (X,d) is called Δgeneric, if, for each fixed i, the ...