Braille system has been used by the visually impaired people for reading.The shortage of Braille books has caused a need for conversion of Braille to text. This paper addresses the geometric correction of a Braille document images. Due to the standard measurement of the Braille cells, identification of Braille characters could be achieved by simple cell overlapping procedure. The standard measu...

We calculated the complete next-to-leading order(NLO) QCD corrections to the tt̄bb̄ production process at a γγ collider in the standard model(SM). The calculation of the one-loop QCD correction includes the evaluations of the hexagon and pentagon amplitudes. We studied the NLO QCD corrected total cross section, the distributions of transverse momenta of final topand bottom-quark states, and the d...

We present an algebraic multilevel method that is based on sparse approximate inverse matrices. The approach is based on the observation that sparse approximate inverses based on norm minimization [4,3,2] can easily be adapted such that they approximate the operator quite well on a large subspace. A natural consequence is to augment the sparse approximate inverse with a correction term of small...

We prove an adiabatic theorem for the ground state of the Dicke model in a slowly rotating magnetic field and show that for weak electron-photon coupling , the adiabatic time scale is close to the time scale of the corresponding two level system–without the quantized radiation field. There is a correction to this time scale which is the Lamb shift of the model. The photon field affects the rate...

We prove an adiabatic theorem for the ground state of the Dicke model in a slowly rotating magnetic field and show that for weak electron-photon coupling , the adiabatic time scale is close to the time scale of the corresponding two level system–without the quantized radiation field. There is a correction to this time scale which is the Lamb shift of the model. The photon field affect the rate ...

BACKGROUND Dermal augmentation continues to grow as an aesthetic facial procedure. Many exogenous filler materials rely on an autologous fibrotic response for volume augmentation. AIMS To evaluate the efficacy of a single injection of autologous platelet-rich fibrin matrix (PRFM) for the correction of deep nasolabial folds (NLFs). PATIENTS/METHODS Whole blood was obtained from 15 adults, an...

A small-scale laboratory adaptive optics system using a Shack-Hartmann wave-front sensor (WFS) and a membrane deformable mirror (DM) has been built for robust image acquisition. In this study, an adaptive limited control technique is devised to maintain the long-term correction stability of the adaptive optics system. To prevent the waste of dynamic correction range for small residual wave-fron...

We examine the scale dependence in the resonance region of inclusive ep scattering. In particular we discuss the invariants other than Q, which have been proposed as a scale for pQCD evolution in a kinematical regime where both infrared singularities and power corrections are expected to be largest. We show that the region where most of the present data are available, can be described using NLO...

We prove that the scaling limits of spin fluctuations in four-dimensional Ising-type models with nearest-neighbor ferromagnetic interaction at or near critical point are Gaussian. A similar statement is proven for $\lambda \phi^4$ fields over $\mathbb{R}^4$ a lattice ultraviolet cutoff, limit infinite volume and vanishing spacing. The proofs enabled by models' random current representation, whi...