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22 papers · 1 filter
Higher Correlations of Divisor Sums Related to Primes II: Variations of the error term in the prime number theorem
D. A. Goldston, C. Y. Yildirim
We calculate the triple correlations for the truncated divisor sum . The 's behave over certain averages just as the prime counting von Mangoldt function …
String Theory in the Penrose Limit of AdS_2 x S^2
Cemsinan Deliduman, Burak T. Kaynak
The string theory in the Penrose limit of AdS_2 x S^2 is investigated. The specific Penrose limit is the background known as the Nappi-Witten spacetime, which is a plane-wave backg…
Kasner generalization of Levi-Civita spacetime
Ozgur Delice
We investigate some cylindrically symmetric nonstationary and nonstatic solutions of Einstein field equations. We first study some physical properties of a solution which can be co…
String Matching and 1d Lattice Gases
Muhittin Mungan
We calculate the probability distributions for the number of occurrences of a given letter word in a random string of letters. Analytical expressions for the distributi…
On the Rotational Dynamics of Magnetically Threaded Disks around Neutron Stars
M. Hakan Erkut, M. Ali Alpar
We investigate the rotational dynamics of disk accretion around a strongly magnetized neutron star with an aligned dipole field. The magnetospheric field is assumed to thread the d…
Supersymmetric Strings and Waves in D=3, N=2 Matter Coupled Gauged Supergravities
N. S. Deger, O. Sarioglu
We construct new 1/2 supersymmetric solutions in D=3, N=2, matter coupled, U(1) gauged supergravities and study some of their properties. In the most general case they represent a…
D-brane Gases and Stabilization of Extra Dimensions in Dilaton Gravity
S. Arapoglu, A. Kaya
We consider a toy cosmological model with a gas of wrapped Dp-branes in 10-dimensional dilaton gravity compactified on a p-dimensional Ricci flat internal manifold. A consistent ge…
Monte Carlo Simulation and Statistical Analysis of Genetic Information Coding
E. Gultepe, M. L. Kurnaz
The rules that specify how the information contained in DNA codes amino acids, is called "the genetic code". Using a simplified version of the Penna nodel, we are using computer si…
El Farol Revisited
Hilmi Lus, Cevat Onur Aydin, Sinan Keten +2
This article is concerned with the global behavior of agents in the El Farol bar problem. In particular, we discuss the global attendance in terms of its mean and variance, and sho…
Early phases of different types of isolated neutron star
A. Ankay, E. Yazgan, S. Sahin +1
Two Galactic isolated strong X-ray pulsars seem to be in the densest environments compared to other types of Galactic pulsar. X-ray pulsar J1846-0258 can be in an early phase of an…
On Bode's law
R. Bass, A. Del Popolo
In a planetary or satellite system, idealized as n small bodies in initially coplanar, concentric orbits around a large central body, obeying Newtonian point-particle mechanics, re…
Analytical Solution of a Stochastic Content Based Network Model
Muhittin Mungan, Alkan Kabakcioglu, Duygu Balcan +1
We define and completely solve a content-based directed network whose nodes consist of random words and an adjacency rule involving perfect or approximate matches, for an alphabet…
First observation of a narrow charm-strange meson DsJ(2632) -> Ds eta and D0 K+
The SELEX Collaboration, A. V. Evdokimov
We report the first observation of a charm-strange meson DsJ(2632) at a mass of 2632.6+/-1.6 MeV/c^2 in data from SELEX, the charm hadro-production experiment E781 at Fermilab. Thi…
Random Walk with Shrinking Steps: First Passage Characteristics
Tonguç Rador, Sencer Taneri
We study the mean first passage time of a one-dimensional random walker with step sizes decaying exponentially in discrete time. That is step sizes go like with .…
Static Cylindrical Matter Shells
Metin Arik, Ozgur Delice
Static cylindrical shells composed of massive particles arising from matching of two different Levi-Civita space-times are studied for the shell satisfying either isotropic or anis…
Constraints to cosmological parameters through clusters evolution
A. Del Popolo, N. Ercan
In this paper, I revisit the constraints obtained by several authors (Reichart et al. 1999; Eke et al. 1998; Henry 2000) on the estimated values of Omegam, n and sigma_8 in the lig…
Upper limit on the decay Sigma(1385)- --> Sigma- gamma, and cross section for gamma Sigma- --> Lambda pi-
SELEX Collaboration, V. V. Molchanov
Coherent Lambda pi- production on Pb of 600 GeV Sigma- hyperons has been studied with the SELEX facility at Fermilab. Using the Primakoff formalism, we set a 90% CL upper limit on…
Detrended fluctuation analysis as a statistical tool to monitor the climate
M. L. Kurnaz
Detrended fluctuation analysis is used to investigate power law relationship between the monthly averages of the maximum daily temperatures for different locations in the western U…
Application of detrended fluctuation analysis to monthly average of the maximum daily temperatures to resolve different climates
M. L. Kurnaz
Detrended fluctuation analysis is used to investigate correlations between the monthly average of the maximum daily temperatures for different locations in the continental US and t…
Partner symmetries and non-invariant solutions of four-dimensional heavenly equations
A A Malykh, Y Nutku, M B Sheftel
We extend our method of partner symmetries to the hyperbolic complex Monge-Ampère equation and the second heavenly equation of Plebañski. We show the existence of partner symmetrie…
An Algebraic Approach to Rectangle Packing Problems
Baris Altunkaynak
A method for converting the geometrical problem of rectangle packing to an algebraic problem of solving a system of polynomial equations is described.
Primordial and asymptotic inflation in Brans-Dicke cosmology
M. Arik, M. C. Calik
The basic motivation of this work is to attempt to explain the rapid primordial inflation and the observed slow late-time inflation by using the Brans-Dicke theory of gravity. We s…