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Recently there have been numerous studies exploring the benefits of the coalition formation in a cognitive radio network and it has been shown that coalition formation tends to improve the performance of cognitive radio networks. In this paper, we use the concepts from matching theory to form coalitions of varying size among cognitive radio users for cooperative spectrum sensing under target detection...
The Cognitive Radio (CR) is a fully-reconfigurable wireless device that can intelligently sense, manage, and exploit temporarily-vacant licensed spectrum bands during the absence of incumbent users. Broadly, the IEEE 802.22 is the first complete Wireless Regional Area Network (WRAN) standard that utilizes CR technology in the opportunistic access of white spaces in the television (TV) bands. Intrinsically,...
Graphene is a wonderful material with outstanding properties which is ideal for micro-electro-mechanical systems (MEMS) and also nano-electro-mechanical systems (NEMS) like sensors and switches including strain gauges, mass and force sensors. Graphene is single atom thick layer of graphite which consists of carbon atoms that are bonded together in a hexagonal honeycomb lattice. A way of fabricating...
This paper investigates how to improve the performance of Human-Machine Interface systems using surface electromyogram (sEMG) signals to detect human intention in the forearm muscles. Our goal is to make a robust bionic interface that can interact with computers or robots with human motion. Since recognition performance is highly sensitive to the number and the types of target motions to classify,...
This paper develops a simplified dependency model for sources on social networks that is shown to improve the quality of fact-finding -- assessing veracity of observations shared on social media. Recent literature developed a mathematical approach for exploiting social networks, such as Twitter, as noisy sensor networks that report observations on the state of the physical world. It was shown that...
Bio-inspired Address Event Representation change detection image sensors, also known as silicon retinae, have matured to the point where they can be purchased commercially, and are easily operated by laymen. Noise is present in the output of these sensors, and improved noise filtering will enhance performance in many applications. A novel approach is proposed for quantifying the quality of data received...
In this paper, we propose a method for distributed compressed video sensing (DCVS) based on dictionary learning. The proposed method divides the video sequences into group of pictures (GOP). Each GOP includes a key-frame following by a CS-frame. Compressed sensing (CS) is used to exploit spatial redundancy of frames. At the encoder side Key-frames are sampled using random projection methods. To acquire...
This paper presents a spatially configurable input stage for differential-to-single ended conversion enabling signal propagation through single ended field programmable interconnection networks. The input stage uses current mode sensing for differential-to-single ended conversion. Compared to voltage mode sensing, it can support higher common-mode input voltage. Post-layout Monte-Carlo simulations...
We propose novel platform for wide range of applications using doped silicon in the Mid infrared. In this range a highly doped silicon acts like a plasmonic waveguide with various interesting application. These application include biomedical sensing, gas sensing, and thermal energy harvesting.
This paper develops a new principled frameworkto solve a hardness-aware truth discovery problem in socialsensing applications. Social sensing has emerged as a new applicationparadigm where a large crowd of social sensors (humansor devices on their behalf) are recruited to or voluntarily reportobservations about the physical environment at scale. Theseobservations may be either true or false, and hence...
First anti-symmetric (Ai) mode Lamb wave propagating in a LiTaO3 thin plate at an Euler angle around (0°, 45°, 0°) has a high velocity. Both phase velocity and electromechanical coupling factor have been evaluated at different propagation angles (0°, 45°, ψ°). A1 mode Lamb wave at (0°, 45°, 0°) offers the highest velocity and largest electromechanical coupling factor, thus proving suitable for high...
In this paper, we present a novel bio-inspired CMOS-based hexagonal ISFET sensor which, compared to traditional devices, exhibit a more compact arrangement as part of large arrays and provides benefits in terms of capacitive attenuation. We classify these novel sensors as Enclosed Gate Transistors (EGTs) and provide a layout in standard AMS 0.35 μm technology. Electrical characteristics are derived...
We review the challenges and suggest future directions of carbon nanostructure CMOS integration for lab-on-a-chip systems. Power and area requirements of standard benchtop sensor instrumentation limits their use in portable applications. We have been developing carbon based nanostructures and low power analog readouts to enable sensitive and highly efficient sensor measurement in a single measurement...
We propose a highly efficient compact sensor that is based on Bragg gratings. The high efficiency represent the coupling power to the grating waveguide. We achieved high coupling efficiency approaching 50% with relatively small dimensions. The design is characterized by its easy fabrication techniques due to the reliable dimensions, this in turn can help in having it being integrated with other electronic...
Social sensing is a new application paradigm of cyber-physical-social systems (CPSS), where a group of individualsvolunteer to report their claims about the physicalenvironment using cyber devices. A fundamental problem insocial sensing application is to ascertain source reliability andthe claim correctness without knowing either of them a priori, which is referred to as truth finding. Several key...
We propose a unique Dynamic Sensing Scheduling (DSS) scheme to prolong the lifetime of a sensor network. Different from most existing works, we study the sensor network lifetime under two practical requirements: sensing coverage and network connectivity. A sensor node is considered critical if its depletion of energy would cause either a violation of the sensing coverage requirement (specified by...
As a promising material in MEMS field, SiC is widely used to fabricate sensors in many applications. Considering its fabrication potential and optical properties, SiC was chosen as the core material of evanescent waveguide sensor in this paper. LPCVD and PECVD deposition were combined in fabricating the waveguide. To reduce the coupling loss and misalignment effect, 3D tapered couplers were designed...
Direct-conversion radio transceivers can offer reprogrammable and low-cost hardware solutions for full-duplex (FD) cognitive radio (CR) devices. However, they are susceptible to radio frequency (RF) impairments, such as in-phase (I) and quadrature (Q) imbalance (IQI), which can significantly constrain the spectrum sensing capabilities. This paper is devoted to quantify and evaluate the effects of...
Direct-conversion radio transceivers can offer reprogrammable and low-cost hardware solutions for full-duplex (FD) cognitive radio (CR) devices. However, they are susceptible to radio frequency (RF) impairments, such as in-phase (I) and quadrature (Q) imbalance (IQI), which can significantly constrain the spectrum sensing capabilities. This paper is devoted to quantify and evaluate the effects of...
Up to now, the semiconductor industry has been developed under the promotion of the fine processing technology. The power relationships of the semiconductor industry have been changed drastically at the each advent of products used advanced fine process. In the past, this phenomenon is observed on the DRAM business frequently. Therefore, it is often said that semiconductor industry has the gambling...
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