An equivalent circuit approach is adopted in this paper to analyze a novel varactor loaded phasing line, specifically designed to improve the frequency agility features of reconfigurable aperture-coupled reflectarray cell, through the use of a couple of microstrip radial stubs. The proposed analysis method is fruitfully implemented to perform a fast and preliminary investigation on the improvem...

A detailed wavelength-scanned surface-enhanced Raman excitation spectroscopy (WS SERES) study of benzenethiol adsorbed on Ag nanoparticle arrays, fabricated by nanosphere lithography (NSL), is presented. These NSL-derived Ag nanoparticle array surfaces are both structurally well-characterized and extremely uniform in size. The WS SERES spectra are correlated, both spatially and spectrally, with...

In an intriguing essay, G. A. Cohen has defended a conservative bias in favour of existing value. In this paper, we consider whether Cohen's conservatism raises a new challenge to the use of human enhancement technologies. We develop some of Cohen's suggestive remarks into a new line of argument against human enhancement that, we believe, is in several ways superior to existing objections. Howe...

We describe an automated edge enhancement procedure that operates in conjunction with clustereddot dithering, edge weighted unsharp masking, compound anisotropic diffusion etc. The goal is to make weak edges more noticeable and to give the strong edges in the half toned image a sharper and more natural appearance. Unsharp masking that is widely used for image enhancement amplifies image contras...

Hyperthermic enhancement of cis-diammine-1,1-cyclobutane dicarboxylate platinum(II) (carboplatin) cytotoxicity was studied in vitro in JM, a human acute lymphoblastic leukemia cell line. Corrected for direct heat toxicity, hyperthermia enhanced carboplatin killing at the clinically relevant temperatures of 40.5 degrees and 41.8 degrees C. The thermal enhancement ratios at these temperatures wer...

Optical cavities with multiple tunable resonances have the potential to provide unique electromagnetic environments at two or more distinct wavelengths--critical for control of optical processes such as nonlinear generation, entangled photon generation, or photoluminescence (PL) enhancement. Here, we show a plasmonic nanocavity based on a nanopatch antenna design that has two tunable resonant m...

Enhancement and detection of 3D vessel-like structures has long been an open problem as most existing image processing methods fail in many aspects, including a lack of uniform enhancement between vessels of different radii and a lack of enhancement at the junctions. Here, we propose a method based on mathematical morphology to enhance 3D vessellike structures in biomedical images. The proposed...

Detailed model calculations of auroral secondary and photoelectron distributions for varying conditions have been used to calculate the theoretical enhancement of incoherent scatter plasma lines. These calculations are compared with EISCAT UHF radar measurements of enhanced plasma lines from both the E and F regions, and published EISCAT VHF radar measurements. The agreement between the calcula...

We have measured uxes of ten narrow-ray lines in 19 X-class solar ares observed by the Solar Maximum Mission spectrometer from 1980 to 1989. These lines originate from interaction of energetic protons and-particles with ambient solar material. Flare-to-are variations in line uxes reveal that the abundances of elements in the are plasma are grouped with respect to their rst ionization potentials...

Fast collisionless magnetic reconnection implies fast energy conversion. The main form of conversion in concerns bulk ion acceleration with resulting jets. Based on theoretical analysis and MMS data, we examine the kinetic imprints context rates. analyze observations include beams toward X-line distorted velocity distributions lead to a bipolar reversal an off-diagonal element pressure tensor a...