Let R(Ka,b, Kc,d) be the minimum number n so that any n-vertex simple undirected graph G contains a Ka,b or its complement G′ contains a Kc,d. We demonstrate constructions showing that R(K2,b, K2,d) > b + d + 1 for d ≥ b ≥ 2. We establish lower bounds for R(Ka,b, Ka,b) and R(Ka,b, Kc,d) using probabilistic methods. We define R′(a, b, c) to be the minimum number n such that any n-vertex 3-unifor...

Sea ice monitoring and classification is one of the main applications of Synthetic Aperture Radar (SAR) remote sensing. C-band SAR imagery is regarded as an optimal choice for sea ice applications; however, other SAR frequencies has not been extensively assessed. In this study, we evaluate the potential of fully polarimetric L-band SAR imagery for monitoring and classifying sea ice during dry w...

In this study, a fractal, Y-shaped dual-mode resonator bandpass filter (BPF) with input-output cross-coupling is introduced. A parallel-coupling feed structure with a cross coupling has been used to generate two transmission zeroes (TZs) near the lower and upper cutoff frequency that can effectively improve the passband edge selectivity. Also, a fractal shaped based on conventional diamond and ...

We propose a photonic method to generate and transmit dual-band dual-chirp microwave waveforms based on dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM). The key novelty of this work is the generation with flexible central frequency relationship meet requirement radar system, transmission generated elimination power fading. In proposed method, are by applying two different RF s...

Multi-band WDM transmission beyond the C+L-band is a promising technology for achieving larger capacity by limited number of installed fibers. In addition to C- and L-band, we can expect use S-band as next band. Although development optical components new bands, particularly transceivers, entails resource dispersion, which one barriers realization multi-band systems, wavelength conversion trans...

m a y / j u n e 2 0 0 9 InsideGNSS 47 W ithin the European Space Agency (ESA) GNSS Evolution program, EADS Astrium has led a team analyzing the potential benefits, performance, and technical requirements for adding a Cband navigation capability to existing L-band services on a second-generation Galileo. The C-band issue is not new. Between 1998 and 2004, U.S. and European researchers undertook ...

Objective- To determine the effects of the Hydrocortisone on in vitro growth of fibrobla sts isolatedfrom the distal  aspects of the horses limbs.Design- Experimental in vitro study.Animals- A total of 4 Caspian miniature and 4 mixed thoroughbred horses. Procedures- Under generalanesthesia and aseptic condition, a full thickness of skin incision was created on the lateral aspects of themetacarp...

in this paper, a photonic crystal waveguide with point defects and lattice constant perturbations of +5%, -5% are being investigated. firstly waveguide structures with constant and specific parameters are being studied and photonic band gap diagrams for te/tm modes are depicted; then pulse propagation in the frequencies available in the band gap are shown. after that, effects of parameters like...

Only a single linearly dispersing π-band cone, characteristic of monolayer graphene, has so far been observed in Angle Resolved Photoemission (ARPES) experiments on multilayer graphene grown on C-face SiC. A rotational disorder that effectively decouples adjacent layers has been suggested to explain this. However, the coexistence of μm-sized grains of single and multilayer graphene with differe...