Let G be an additive finite abelian group with exponent exp(G). Let S = g1 · . . . · gl be a sequence over G and k(S) = ord(g1)+· · ·+ord(gl) be its cross number. Let η(G) (resp. t(G)) be the smallest integer t such that every sequence of t elements (repetition allowed) from G contains a non-empty zero-sum subsequence T of length |T | ≤ exp(G) (resp. k(T ) ≤ 1). It is easy to see that t(G) ≥ η(...

Classification of blocks of subband samples according to their energy and variable bit allocation within the subsequent classes has demonstrated considerable gains in coding efficiency. The gains due to classification increase as smaller blocks are used; however, this increases the overheads for transmitting the classification information. In this paper, a quadtree based method is proposed. Thi...

The use of subband coding on image data is discussed. An overviev~ of siibbai~d coding is given. Advantages of subbanding for browsing and progressive resol~itiori ar-e presented. Implementations for lossless and lossy coding are discussed. Algorithn~ considerations and simple implementations of subband systems are given.

In order to prevent sucrose dust explosion, the suppression effect of four inert dusts (such as NH4H2PO4, Al (OH)3, NaCl and NaHCO3) on minimum ignition energy (MIE) was studied by 1.2L Hartmann apparatus. The experimental results shown that fire sensitivity can be reduced adding powders, MIE significantly could increased. higher mass fract...

Purpose : This study aimed to compare peripheral pulse oxygen saturation (SpO<sub>2</sub>) values, measured at different monitoring sites, and arterial (SaO<sub>2</sub>) of neurocritical patients.Methods The included 110 patients admitted the neurosurgical intensive care unit a university hospital. patients’ SpO<sub>2</sub> values were in their index fingers,...

PURPOSE To examine quadriceps muscle fatigue and central motor output during fatiguing single joint exercise at 40% and 80% maximal torque output in resistance trained men. METHOD Ten resistance trained men performed fatiguing isometric knee extensor exercise at 40% and 80% of maximal torque output. Maximal torque, rate of torque development, and measures of central motor output and periphera...

The high phase noise (PN) of CMOS millimeter-wave oscillators has encouraged the adoption wide loop bandwidth for an integer- $N$ phase-locked (PLL). This article proposes a quadrature sampling phase-frequency detector (QS-PFD) to dis...