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Interest in resorbable and biodegradable materials originates from their potential in food packaging, environmental science and ecology, but also in medicine and biotechnology. Till very recently, electronics has not been on such development paths. However, recent advancements in material science, thin processing and nanotechnology offer the prospective of high performance electronic devices which...
In this paper, we study data collection in mobile wireless sensor networks (WSNs) assisted by unmanned aerial vehicle (UAV). We focus on randomly deployed mobile sensors along a predefined path with different but constant velocities, and a flying UAV in different heights to collect data from the mobile sensors. As the network topology is changing under the mobility of the UAV and the sensor nodes,...
Guided Wave (GW) testing for Structural Health Monitoring (SHM) is complicated by dispersion in wave mode propagation. In particular, the dispersive behavior of GWs hinders an accurate estimation of the direction of arrival of the wave by monitoring the Difference in Time of Arrival (DToA) associated to different sensors, as normally happens in bulk wave applications. In this work, a novel procedure...
Despite the recent introduction of heavily-doped semiconductors for mid-infrared plasmonics, it still remains an open point whether such materials can compete with noble metals. We employ a whole set of figures of merit to thoroughly assess the use of heavily-doped Ge on Si as a mid-infrared plasmonic material and benchmark it against standard noble metals such as Au. In doing this, we design and...
In this paper the results of layout design and circuit-topological computer simulation of some elements of analytical microsytem-on-chip with the “silicon-on-insulator” (SOI)-structures are presented. These elements were: an input cascade, a basic element of operational amplifier and a ring oscillator based on standard bulk CMOS technology and CMOS technology with the SOI-structures. Also the polysilicon-on-insulator...
This work deals with the bulk damage to p-type silicon pad sensors, for which the knowledge of radiation-induced defects is limited at present. Therefore, three differently grown p-type bulk materials were irradiated with 23 MeV, 188 MeV and 23 GeV protons. In order to study the impact of the bulk damage to sensor properties, I-V and C-V-f measurements were performed during annealing studies. Additionally,...
Among several potential applications of Full- Duplex (FD) technology, FD Cognitive Radio (CR) communication is one important area where FD can provide several advantages and possibilities such as concurrent sensing and transmission, improved sensing efficiency and the secondary throughput. However, the main challenge is to mitigate the harmful effects of the residual Self-Interference (SI) which depends...
We consider a cognitive radio network of nodes with full duplex capability where Self-Interference Suppression (SIS) is not perfect. We have proposed a new scheme for sensing and transmission of Secondary Users (SUs) with two modes of operation; Cooperative Sensing (CS) mode and Full Duplex Transmit and Receive (FDTR) mode. Cooperative sensing is applied to reduce misdetection probability and to avoid...
Spectrum sensing and sharing are challenging task in asynchronous cognitive networks (CNs), where there is nc synchronization between primary and secondary users (PUs and SUs). In this paper, we propose combination of cooperative spectrum sensing and full-duplex communication for improving quality and throughput of both primary and secondary users in asynchronous CNs. More specifically, we have studied...
This work considers reconstructing a target signal in a context of distributed sparse sources. We propose an efficient reconstruction algorithm with the aid of other given sources as multiple side information (SI). The proposed algorithm takes advantage of compressive sensing (CS) with SI and adaptive weights by solving a proposed weighted 𝓃-ℓ1 minimization. The proposed algorithm computes the adaptive...
This work addresses on the fabrication of ion-sensitive field-effect transistors with the multiple Ω-shape nano-channels. The Ω-shaped channels with the width/space about 1∶1, 200/200 nm, were fabricated by the thermal nanoimprint lithography and the anisotropic/isotropic dry etching processes. The sensing properties of proposed ISFETs were studied and compared with the conventional single channel...
The Pd/SnO2/Al2O3/CuO/Ag/SnO2/Al2O3/CuO/p-Si/Al tandem p-i-n diodes with nanorod structure and addition of silver interconnecting metal layer were studied. The added interconnecting metal layer influences the material characteristics and leads the developed device to have a high relative sensitivity ratio of ∼2185% to 3000 ppm CO2 ambient gas. The response time of 20 sec is also fast. Thus, it has...
This work presents an orderly path for the description and simplification of finite state automata (FSA) representation of embedded systems. This approach takes into account some typical features of this kind of systems, i.e. in a given state of a FSA, usually only a few among a large set of system inputs are taken into account. In addition to this, the system presents identical reaction to many inputs...
This paper assesses the feasibility of an on-chip array of terahertz generators/detectors for near-field sensing of a biological cell. With the prototype design, signal generation around 0.55 THz was measured and near-field sensing across the surface of a flat silicon wafer was demonstrated.
Fully autonomous navigation of unmanned vehicles, without relying on pre-installed tags or markers, still remains a challenge especially for GPS-denied areas and complex indoor environments. Robust altitude control and safe landing zone detection are two important tasks for indoor unmanned aerial vehicle (UAV) applications. In this paper, a novel approach is proposed for indoor UAVs to control their...
Silicon has many favorable attributes from both the device physics and manufacturing standpoints, and is therefore the pre-eminent material for micro- and nanoelectronics. Furthermore, due to its transparency at infrared wavelengths, silicon-based integrated photonics play a key role in modern optical communications devices. Silicon-based nano-optical antennas have also attracted much interest recently,...
In this work, we present the design and fabrication of high-frequency SiC nanoresonators for highly sensitive nanoparticle sensing. A 280-nm single crystalline SiC film was grown on a Si wafer, and released from the substrate using an isotropic dry etching process. The SiC nanoresonators were then formed using the Focused Ion Beam technique. The simulation results show that the as-fabricated resonators...
Nano-textured surfaces on Si, Cu, and polystyrene (PS) substrates with feature sizes down to 10–20nm fabricated over large areas by simple maskless plasma and chemical etching (Si and Cu, respectively) or thermally induced PS shrinking are compared for the surface enhanced Raman scattering (SERS) action.
In inertial motion capture, a multitude of body segments are equipped with inertial sensors, consisting of 3D accelerometers and 3D gyroscopes. Using an optimization-based approach to solve the motion capture problem allows for natural inclusion of biomechanical constraints and for modeling the connection of the body segments at the joint locations. The computational complexity of solving this problem...
In this paper, we present a multi-agent reinforcement learning (MARL) framework that leverages the emergent behaviors from swarm intelligence (SI). The essential backbone of our framework is an flocking-regulated cooperative learning paradigm in which the cooperation among learning agents is realized via the self-organizing principles derived from natural interaction of flocking boids. In the proposed...
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