Interacting Bose and Fermi gases in low dimensions and the Riemann hypothesis

We apply the S-matrix based finite temperature formalism to non-relativistic Bose and Fermi gases in 1+1 and 2+1 dimensions. In the 2+1 dimensional case, the free energy is given in terms of Roger's dilogarithm in a way analagous to the relativistic 1+1 dimensional case. The 1d fermionic case with a quasi-periodic 2-body potential provides a physical framework for understanding the Riemann hypothesis.Comment: version 3: additional appendix explains how the $\nu$ to $1-\nu$ duality of Riemann's $\zeta (\nu)$ follows from a special modular transformation in a massless relativistic theor

DNA in the Courtroom: The 21st Century Begins

DNA is one of the most significant discoveries in the field of forensic evidence yet it remains underutilized in the courtroom setting. This article provides an introduction to the scientific principles, structure and composition of DNA in an effort to make DNA more accessible to the judicial process

DNAV: A WebGL Based Tool for Visualizing the Twists and Turns in the Human Genome

The human genome is tightly folded to fit within the restricted space of the nucleus. One of the key goals in understanding the folding principles of DNA is to unravel the mysteries of how functional elements that are separated from each other are brought together. Long-range interactions between folded segments of chromosomes form complex three-dimensional networks and are fundamental in controlling gene expression. These long-range interactions have been observed using chromosome conformation capture (3C). This Hi-C data contains a wealth of information on the nearest-neighbor influence on the deviation of the DNA axis that can be modeled theoretically. We have developed a tool using WebGL to visualize the modeled structures

Status of the High-Temperature Gas-Cooled Reactor

The history of gas-cooled reactor developmert is reviewed. The 40-Mw HTGR r the Peach Bottom Power Plart is described. Other projects to follow this prototype are outlined. Fuel development and progress in graphite core technology are discussed. The program sponsored by the Empire State Atomic Development Associates for a high-temperature gas-cooled reactor with an output of 300 to 500 Mw(e) is described. (M.C.G.

Ransomware against Police: Diagnosis of Risk Factors via Application of Cyber-Routine Activities Theory

Technologically advanced hackers are able to commit a crime and leave undiscovered by the authorities. Recent increases in cyber-attacks utilizing technology known as ransomware are leaving police departments and other institutions in the serious situation of having to pay ransom to cybercriminals. The present study employs a Cyber-Routine Theoretical approach in explaining why ransomware victimization has become a viral phenomenon. Data were derived from the recent reported cases of ransomware attacks towards police departments in the U.S. and analyzed in order to build a victim profile. This study shows that online lifestyle and cybersecurity are the salient factors that contribute to the ransomware victimization. Future potential preventive measures and policies will be discussed

Finite temperature spectral function of Mott insulators and CDW States

We calculate the low temperature spectral function of one-dimensional incommensurate charge density wave (CDW) states and half-filled Mott insulators (MI). At $T=0$ there are two dispersing features associated with the spin and charge degrees of freedom respectively. We show that already at very low temperatures (compared to the gap) one of these features gets severely damped. We comment on implications of this result for photoemission experiments.Comment: 4 pages, 2 figures, published versio

Large magnetoresistance using hybrid spin filter devices

A magnetic "spin filter" tunnel barrier, sandwiched between a non-magnetic metal and a magnetic metal, is used to create a new magnetoresistive tunnel device, somewhat analogous to an optical polarizer-analyzer configuration. The resistance of these trilayer structures depends on the relative magnetization orientation of the spin filter and the ferromagnetic electrode. The spin filtering in this configuration yields a previously unobserved magnetoresistance effect, exceeding 100%.Comment: 3.5 pages, 3 figures, submitted to Appl. Phys. Let

On open-closed extension of boundary string field theory

We investigate a classical open-closed string field theory whose open string sector is given by boundary string field theory. The open-closed interaction is introduced by the overlap of a boundary state with a closed string field. With the help of the Batalin-Vilkovisky formalism, the closed string sector is determined to be the HIKKO closed string field theory. We also discuss the gauge invariance of this theory in both open and closed string sides.Comment: 25 pages, 2 figures, comments and a reference added, typos correcte

Observation of band structure and density of states effects in Co-based magnetic tunnel junctions

Utilizing Co/Al$_2$O$_3$/Co magnetic tunnel junctions (MTJs) with Co electrodes of different crystalline phases, a clear relationship between electrode structure and junction transport properties is presented. For junctions with one fcc(111) textured and one polycrystalline (poly-phase and poly-directional) Co electrode, a strong asymmetry is observed in the magnetotransport properties, while when both electrodes are polycrystalline the magnetotransport is essentially symmetric. These observations are successfully explained within a model based on ballistic tunneling between the calculated band structures (DOS) of fcc-Co and hcp-Co.Comment: 4 pages, 3 figures, submitted to Phys. Rev. Let

Excited state g-functions from the Truncated Conformal Space

In this paper we consider excited state g-functions, that is, overlaps between boundary states and excited states in boundary conformal field theory. We find a new method to calculate these overlaps numerically using a variation of the truncated conformal space approach. We apply this method to the Lee-Yang model for which the unique boundary perturbation is integrable and for which the TBA system describing the boundary overlaps is known. Using the truncated conformal space approach we obtain numerical results for the ground state and the first three excited states which are in excellent agreement with the TBA results. As a special case we can calculate the standard g-function which is the overlap with the ground state and find that our new method is considerably more accurate than the original method employed by Dorey et al.Comment: 21 pages, 6 figure