Multiplication and squaring are important operations in digital signal processing and multimedia applications. This paper presents designs for units that implement either multiplication, A × B, or sum-of-squares computations, A2 + B2, based on an input control signal. Compared to conventional parallel multipliers, these units have a modest increase in area and delay, but allow either multiplica...

This paper reports an investigation of the stability and dissociation dynamics of the low-lying singlet and triplet states of ozone (O3) using coincident photoelectron and photofragment translational spectroscopy. These experiments provide an upper limit of 0.5 μs for the lifetime of the low-lying excited states of O3. The A2 and B2 states dissociate with nearly all available energy appearing i...

The charge transfer effect of different meso-substituted linkages on porphyrin analogue 1 (A1, B1 and C1) was theoretically investigated using density functional theory (DFT) and time-dependent DFT (TDDFT) calculations. The calculated geometry parameters and natural bond orbital analysis reveal that the twisted conformation between porphyrin macrocycle and meso-substituted linkages leads to blo...

objective: the aim of this study was to evaluate the effect of concepsis (a chlorhexidine gluconate based cavity disinfectant) application on composite restorations micro leakage, using two adhesive systems: excite and adhese. materials and methods: in this interventional experimental study, class v cavities were prepared on buccal surfaces of seventy-two extracted bovine incisors. the specimen...

OBJECTIVE To evaluate whether thromboxane A2 participates in the ischemia-reperfusion injury associated with acute compartmental syndrome (ACS) and if by using a cyclooxygenase inhibitor this can be either reduced or abolished. DESIGN To assess the role of thromboxane A2 in ACS, a tourniquet was applied for 2 hours to the hind limb of 12 dogs. Group 1 (n = 6) served as controls while group 2 ...

Phase transformations and the resulting microstructural evolution of near-Ti2AlNb and Ti-12Al38Nb O 1 bcc orthorhombic alloys were investigated. For the near-Ti2AlNb alloys, the processing temperatures were below the bcc transus, while, for Ti-12Al-38Nb, the processing temperature was supertransus. Phase evolution studies showed that these alloys contain several constituent phases, namely, bcc,...

The impact of climate change on local discharge variability is investigated in the Suir River Catchment which is located in the south-east of Ireland. In this paper, the Rossby Centre Regional Atmospheric Model (RCA) is driven by different global climate data sets. For the past climate (1961–2000), the model is driven by ECMWF reanalysis (ERA-40) data as well as by the output of the general cir...

The aim of this note is to point out and correct some errors in the definition of the four arithmetic operations for triangle intuitionistic fuzzy numbers introduced by Shu et al. [Shu MH, Cheng CH, Chang JR. Using intuitionistic fuzzy sets for fault-tree analysis on printed circuit board assembly. Microelectron Reliab 2006;46:2139–48]. 2008 Elsevier Ltd. All rights reserved. Based on the conce...