A novel multibody rocking model is developed to investigate the dynamic response of two stacked rigid blocks placed on a linear base isolation device. The used realistic statue-pedestal system subject pulse-like ground motions. analysis shows that, in general, increases safety level system. However, for large period pulses or small size blocks, isolator can amplify motion, resulting lower minim...

Let $mathbf{c}_0$ be the real vector space of all real sequences which converge to zero. For every $x,yin mathbf{c}_0$, it is said that $y$ is block diagonal majorized by $x$ (written $yprec_b x$) if there exists a block diagonal row stochastic matrix $R$ such that $y=Rx$. In this paper we find the possible structure of linear functions $T:mathbf{c}_0rightarrow mathbf{c}_0$ preserving $prec_b$.

In this paper attacks on double block length hash functions using a block cipher are considered. We present attacks on all double block length hash functions of hash rate 1, that is, hash functions where in each round the block cipher is used twice, s.t. one encryption is needed per message block. In particular, our attacks break the Parallel-DM presented at Crypto'9333].

The blocking mechanism of the Na+ channel by penticainide, a disopyramide analogue, was studied in rabbit cardiac Purkinje fibers. Na+ channel activity was measured directly by recording the slowly inactivating Na+ current or indirectly by measuring Vmax. The two-microelectrode technique was used to measure currents under voltage-clamp conditions or to impose different degrees and durations of ...

Introduction Imaging sequences reliant upon non-selective refocusing (e.g., 3D TSE, 3D GraSE, and 3D SE-EPI) widely employ either block/sinc refocusing pulses susceptible to field inhomogeneities or adiabatic pulses that demand high SAR. The aim of this work was to evaluate a sample of short, low-SAR, non-selective refocusing pulses by comparing signals acquired with a 3D SE-EPI sequence at 7 T...

We theoretically propose a procedure for designing quasi-phase-matching (QPM) gratings for compressing ultrashort optical pulses during difference-frequency generation. The grating consists of blocks of crystal with the same block length and the direction of spontaneous polarization of each block is determined by an optimal algorithm through which the sign of the nonlinear coefficient of each b...

A new and effective direct method to determine the numerical solution of specific nonlinear Volterra-Fredholm integral and integro-differential equations is proposed. The method is based on vector forms of block-pulse functions (BPFs). By using BPFs and its operational matrix of integration, an integral or integro-differential equation can be transformed to a nonlinear system of algebraic equat...