In the proposed work, if one service provider is found to be overloaded, it utilizes the spectrum of the other service provider which is found to be underutilized. Thus, CR nodes senses the best available channel for sharing and it provides the list of available channels to the overloaded service provider to utilize the under utilized spectrum efficiently. Spectrum sharing among service provide...

This paper describes the development of a unique fluorescence based DNA diagnostic assay that does not require labeling of the target sequence prior to analysis. The assay uses polyacrylamide hydrogel plugs immobilized in microfluidic channels, and is based on the displacement of a short sacrificial fluorescent-tagged indicator oligomer by a longer untagged target sequence as it is electrophore...

Anthracene-based adenines 1 and 2 have been designed and synthesized, and their metal ion recognition properties have been established fluorometrically. Both molecules exhibit Cu²⁺ induced ON-OFF type signaling patterns over the other representative metal ions studied. Compound 1 exhibits 97% quenching of emission in the presence of Cu²⁺ whilst derivative 2 shows 81% quenching under similar exp...

Ultrathin plasmonic metasurfaces have proven their ability to control and manipulate light at unprecedented levels, leading to exciting optical functionalities and applications. Although to date metasurfaces have mainly been investigated from an electromagnetic perspective, their ultrathin nature may also provide novel and useful mechanical properties. Here we propose a thin piezoelectric plasm...

Polysaccharide-induced protein fluorescence 'turn-on' responses have been studied in the presence of similarly charged micelle at pH ∼3. Quenched protein fluorescence is selectively recovered ('on' state) for bovine serum albumin (BSA) with sodium carboxy methyl cellulose (SCMC) and for pepsin (PS) with chitosan (CS) with starting ultra low concentrations of 0.04 μM and 0.008 μM respectively.

Metalloporphyrins [Mn(III) and In(III)] are investigated as active polymer fihn components in the design of reversible anion-selective optical sensors. The optical measurements are made by casting thin plasticiied polymer films (PVC, polyurethane, etc.) containing the given metalloporphyrhts on glass plates. When bathed in aqueous test solutions, the optical response of such fihns is based upon...

Corner cube retroreflectors (CCRs) have applications in sensors, image processing, free space communication and wireless networks. The ability to construct low-loss wavelength filters embedded in CCRs can enable the development of wavelength multiplexing, tunable lasers and photonic integrated circuits. Here we created an ~10-μm-thick holographic corner cube retroreflector (HCCR) array that act...

Facial behaviors represent activities of face or facial feature in spatial or temporal space, such as facial expressions, face pose, gaze, and furrow happenings. An automated system for facial behavior recognition is always desirable. However, it is a challenging task due to the richness and ambiguity in daily facial behaviors. This paper presents an efficient approach to real-world facial beha...

Here we report the selective sensing of BSA (bovine serum albumin) by 8-(alkoxy)quinoline-based fluorescent probes, via non-covalent interactions. The weak fluorescence of these probes in aqueous solution showed a dramatic increase in quantum yield and lifetime upon binding with BSA, while the responses to various other proteins/enzymes used were negligible under similar experimental conditions...

New ionophores are essential for advancing the art of selective ion sensing. Metal-organic supercontainers (MOSCs), a new family of biomimetic coordination capsules designed using sulfonylcalix[4]arenes as container precursors, are known for their tunable molecular recognition capabilities towards an array of guests. Herein, we demonstrate the use of MOSCs as a new class of size-selective ionop...