We determine the threshold power for self-focusing collapse both in a bulk medium and in a hollow-core waveguide for various spatial profiles. We find that the threshold power for collapse in the waveguide is always equal to the lower-bound prediction for a bulk medium.

Limited energy consumption in multimedia requires very low power circuits. In this paper we focused on leakage current minimization in single static random access memory (SRAM) cell in 90nm complementary metal oxide semiconductor (CMOS) technology. The leakage current mainly consists of sub threshold leakage current and gate leakage current in 90nm CMOS technology. So minimizing the sub thresho...

Novel A–p–D–p–A V-shaped 3,6-bis(phenylethynyl)carbazole based chromophores were designed and synthesized as two-photon polymerization (TPP) initiators combining a large twophoton absorption cross-section with facilitated radical formation. 9-Benzyl-3,6-bis(4nitrophenylethynyl)carbazole (4d) shows a strong two-photon absorption around 800 nm and exhibits very high two-photon polymerization init...

In this paper, two novel low-power and high-speed carbon nanotube full-adder cells in dynamic logic style are presented. Carbon nanotube field-effect transistors (CNFETs) are efficient in designing a high performance circuit. To design our full-adder cells, CNFETs with three different threshold voltages (low threshold, normal threshold, and high threshold) are used. First design generates SUM a...

Since the seismic behavior of the earth’s energy (which follows from the power law distribution) can be similarly seen in the energy realized by the stock markets, in this paper we consider a statistical study for comparing the financial crises and the earthquakes. For this end, the TP statistic, proposed by Pisarenko and et al. (2004), is employed for estimating the critical point or the lower...

The transmit power and the carrier sense threshold are two major MAC/PHY parameters in CSMA/CA wireless networks. The problem of transmit power control has been extensively studied in the context of graph-theoretic topology control and maintenance. What has not been studied in depth is the effect of signal to interference plus noise ratio (SINR) on the topology and the network capacity sustaine...

Main source of power dissipation for dynamic CMOS circuits is due to charging and discharging of intrinsic capacitances, commonly referred to as switching power. As switching power dissipation is proportional to the square of supply voltage, lowering the supply voltage is the most effective way to reduce switching power dissipation. However, the reduction of switching power by lowering the supp...