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Compact Dual-Band Bandpass Filter Based On Fractal Stub-Loaded Resonator, Hadi T. Ziboon, Jawad K. Ali 2017 Department of Electrical Engineering, University of Technology, Iraq

Compact Dual-Band Bandpass Filter Based On Fractal Stub-Loaded Resonator, Hadi T. Ziboon, Jawad K. Ali

Professor Jawad K. Ali

Fractal geometries have shown to be a suitable choice for the antenna and microwave circuit designers to produce compact size microwave devices and components. Moreover, the multimode resonators are found advantageous in the design of reduced size multiband bandpass filters. In this paper, a stub loaded resonator (SLR) based on modified Minkowski fractal geometry, is suggested to produce a compact microstrip bandpass filter with dual-band response for wireless communication applications. Based on the second iteration Minkowski fractal geometry, dual-band compact microstrip BPF has been presented. The proposed filter structure is composed of two fractal based symmetrical SLRs. The filter structure ...


Compact Dual-Mode Microstrip Band Reject Filter Based On Koch Fractal Geometry, Hayder S. Ahmed, Ali J. Salim, Jawad K. Ali 2017 Department of Electrical, University of Technology, Iraq

Compact Dual-Mode Microstrip Band Reject Filter Based On Koch Fractal Geometry, Hayder S. Ahmed, Ali J. Salim, Jawad K. Ali

Professor Jawad K. Ali

In this paper, a new fractal-based microstrip dual-mode band stop filter (BSF) has been
presented. The proposed filter structure is mainly based on that of the triangular patch resonators
with an embedded slit structure. The Koch fractal geometry has been applied to the uncoupled side
lengths of the triangular patch resonator. The filter structure has been modeled, and its performance
is evaluated using the commercially available EM simulator, Sonnet. Results reveal that the
resulting dual-mode response depends heavily on the uncoupled side lengths of the triangular patch
resonator. A parametric study has been conducted to explore the effect of the ...


A Compact Dual-Band Slot Antenna Based On Koch Fractal Snowflake Annular Ring, Mahmood T. Yassen, Mohammed R. Hussan, Hussain A. Hammas, Hussam Al-Saedi, Jawad K. Ali 2017 Department of Electrical Engineering, University of Technology, Iraq

A Compact Dual-Band Slot Antenna Based On Koch Fractal Snowflake Annular Ring, Mahmood T. Yassen, Mohammed R. Hussan, Hussain A. Hammas, Hussam Al-Saedi, Jawad K. Ali

Professor Jawad K. Ali

This paper presents the design of a compact dual-band slot antenna for use in the
recently available wireless communication applications. The slot structure of the proposed antenna
is based on an annular slot-ring with Koch snowflake fractal geometry of the third iteration. The
antenna slot structure has been etched on the ground plane of a substrate with relative permittivity
of 4.5 and 1.524 mm thickness. On the other side of the substrate, a 50-Ohm microstrip line has
been etched as the antenna feed structure. The proposed antenna has a compact size of (40 × 40 ×
1.524) mm3. Simulation ...


Unmanned Aerial Vehicle Tracking System With Out-Of-Sequence Measurement In A Discrete Time-Delayed Extended Kalman Filter, Roque Lora 2017 Utah State University

Unmanned Aerial Vehicle Tracking System With Out-Of-Sequence Measurement In A Discrete Time-Delayed Extended Kalman Filter, Roque Lora

All Graduate Theses and Dissertations

The goal of this thesis is to extend the delayed Kalman filter so it can be used with non-linear systems and that it can handle randomized delays on the measurements. In the particular case of this study, the filter is used to estimates the states of an unmanned aerial system. The outputs of the filter are used to point an antenna and a camera towards a UAS. Different scenarios are simulated for the purpose of comparing the efficiency of this technique in various situations.


Recursive Robust Pca Or Recursive Sparse Recovery In Large But Structured Noise, Chenlu Qiu, Namrata Vaswani, Brian Lois, Leslie Hogben 2017 Iowa State University

Recursive Robust Pca Or Recursive Sparse Recovery In Large But Structured Noise, Chenlu Qiu, Namrata Vaswani, Brian Lois, Leslie Hogben

Leslie Hogben

This paper studies the recursive robust principal components analysis problem. If the outlier is the signal-of-interest, this problem can be interpreted as one of recursively recovering a time sequence of sparse vectors, St, in the presence of large but structured noise, Lt. The structure that we assume on Lt is that Lt is dense and lies in a low-dimensional subspace that is either fixed or changes slowly enough. A key application where this problem occurs is in video surveillance where the goal is to separate a slowly changing background (Lt) from moving foreground objects (St) on-the-fly. To solve the above ...


On The Distance Spectra Of Graphs, Ghodratollah Aalipour, Aida Abiad, Zhanar Berikkyzy, Jay Cummings, Jessica De Silva, Wei Gao, Kristin Heysse, Leslie Hogben, Franklin H.J. Kenter, Jephian C.H. Lin, Michael Tait 2017 Kharazmi University

On The Distance Spectra Of Graphs, Ghodratollah Aalipour, Aida Abiad, Zhanar Berikkyzy, Jay Cummings, Jessica De Silva, Wei Gao, Kristin Heysse, Leslie Hogben, Franklin H.J. Kenter, Jephian C.H. Lin, Michael Tait

Leslie Hogben

The distance matrix of a graph G is the matrix containing the pairwise distances between vertices. The distance eigenvalues of G are the eigenvalues of its distance matrix and they form the distance spectrum of G. We determine the distance spectra of double odd graphs and Doob graphs, completing the determination of distance spectra of distance regular graphs having exactly one positive distance eigenvalue. We characterize strongly regular graphs having more positive than negative distance eigenvalues. We give examples of graphs with few distinct distance eigenvalues but lacking regularity properties. We also determine the determinant and inertia of the distance ...


Recursive Robust Pca Or Recursive Sparse Recovery In Large But Structured Noise, Chenlu Qiu, Namrata Vaswani, Brian Lois, Leslie Hogben 2017 Iowa State University

Recursive Robust Pca Or Recursive Sparse Recovery In Large But Structured Noise, Chenlu Qiu, Namrata Vaswani, Brian Lois, Leslie Hogben

Leslie Hogben

This paper studies the recursive robust principal components analysis problem. If the outlier is the signal-of-interest, this problem can be interpreted as one of recursively recovering a time sequence of sparse vectors, St, in the presence of large but structured noise, Lt. The structure that we assume on Lt is that Lt is dense and lies in a low-dimensional subspace that is either fixed or changes slowly enough. A key application where this problem occurs is in video surveillance where the goal is to separate a slowly changing background (Lt) from moving foreground objects (St) on-the-fly. To solve the above ...


Using Gaussian Mixture Model And Partial Least Squares Regression Classifiers For Robust Speaker Verification With Various Enhancement Methods, Joshua Scott Edwards 2017 Rowan University

Using Gaussian Mixture Model And Partial Least Squares Regression Classifiers For Robust Speaker Verification With Various Enhancement Methods, Joshua Scott Edwards

Theses and Dissertations

In the presence of environmental noise, speaker verification systems inevitably see a decrease in performance. This thesis proposes the use of two parallel classifiers with several enhancement methods in order to improve the performance of the speaker verification system when noisy speech signals are used for authentication. Both classifiers are shown to receive statistically significant performance gains when signal-to-noise ratio estimation, affine transforms, and score-level fusion of features are all applied. These enhancement methods are validated in a large range of test conditions, from perfectly clean speech all the way down to speech where the noise is equally as loud ...


P26. Global Exponential Stabilization On So(3), Soulaimane Berkane 2017 sberkane@uwo.ca

P26. Global Exponential Stabilization On So(3), Soulaimane Berkane

Western Research Forum

Global Exponential Stabilization on SO(3)


Quantifying Static And Dynamic Stability Using Mobile Sensors, Mason Schleu 2017 mschleu

Quantifying Static And Dynamic Stability Using Mobile Sensors, Mason Schleu

Student Research and Creative Activity Fair

Balance disorders impact millions of people causing substantial impact on quality of life due to psychological and physical hardships associated with poor balance. However, a clinically relevant, low cost, self-service system in detecting such disorders does not exist. Previous research has shown the built in accelerometer and gyroscope sensors of a smart phone to be valid tools in detecting standing balance performance using traditional linear analysis, however, such a system has yet to be proven useful in detecting dynamic postural variability. Indeed, more quantitative methods than are typically used in clinical settings are necessary for early detection of poor postural ...


Pulse Shape And Timing Dependence On The Spike-Timing Dependent Plasticity Response Of Ion-Conducting Memristors As Synapses, Kris A. Campbell, Kolton T. Drake, Elisa H. Barney Smith 2017 Boise State University

Pulse Shape And Timing Dependence On The Spike-Timing Dependent Plasticity Response Of Ion-Conducting Memristors As Synapses, Kris A. Campbell, Kolton T. Drake, Elisa H. Barney Smith

Elisa H. Barney Smith

Ion-conducting memristors comprised of the layered materials Ge2Se3/SnSe/Ag are promising candidates for neuromorphic computing applications. Here, the spike-timing dependent plasticity (STDP) application is demonstrated for the first time with a single memristor type operating as a synapse over a timescale of 10 orders of magnitude, from nanoseconds through seconds. This large dynamic range allows the memristors to be useful in applications that require slow biological times, as well as fast times such as needed in neuromorphic computing, thus allowing multiple functions in one design for one memristor type—a “one size fits all” approach. This ...


Next Generation Wireless Communications: Cognitive Radio, ADNAN QUADRI, Naima Kaabouch 2017 University of North Dakota

Next Generation Wireless Communications: Cognitive Radio, Adnan Quadri, Naima Kaabouch

ADNAN QUADRI

Wireless networks and information traffic have grown exponentially over the last decade. Consequently, an increase in demand of radio frequency bandwidth has resulted. Recent studies have shown that with the current fixed spectrum allocation, there are spectrum holes that are not utilized all the time by the licensed users while other frequency channels, such as Wi-Fi, are heavily used. To efficiently utilize the radio spectrum, cognitive radio stands to be a promising solution as it will be reconfigurable, self-aware and efficient. This research aims to develop techniques that will allow a cognitive radio system to enhance the radio’s decision-making ...


Technical Report: Control Using The Smooth Robustness Of Temporal Logic, Yash Vardhan Pant, Houssam Abbas, Rahul Mangharam 2017 University of Pennsylvania

Technical Report: Control Using The Smooth Robustness Of Temporal Logic, Yash Vardhan Pant, Houssam Abbas, Rahul Mangharam

Real-Time and Embedded Systems Lab (mLAB)

Cyber-Physical Systems must withstand a wide range of errors, from bugs in their software to attacks on their physical sensors. Given a formal specification of their desired behavior in Metric Temporal Logic (MTL), the robust semantics of the specification provides a notion of system robustness that can be calculated directly on the output behavior of the system, without explicit reference to the various sources or models of the errors. The robustness of the MTL specification has been used both to verify the system offline (via robustness minimization) and to control the system online (to maximize its robustness over some horizon ...


Zone Based Hybrid Approach For Clustering And Data Collection In Wireless Sensor Networks, Karanam R. Dayananda, Jeremy Straub 2017 North Dakota State University--Fargo

Zone Based Hybrid Approach For Clustering And Data Collection In Wireless Sensor Networks, Karanam R. Dayananda, Jeremy Straub

Jeremy Straub

A wireless sensor network (WSN) is a collection of
spatially distributed autonomous sensor nodes that can be used to
monitor, among other things, environmental conditions. WSN
sensor nodes are constrained by their limited energy supply,
communication range and local computational capabilities. Data
routing is an area that can be optimized to allow nodes to conserve
energy, improving the network’s overall lifetime. Though many
routing protocols can be used, using a clustering protocol can play
an important role in conserving WSN energy. Under this
approach, the network is divided into multiple clusters. The
leader of each cluster supervises data transmission ...


Chiral Light Intrinsically Couples To Extrinsic/Pseudo-Chiral Metasurfaces Made Of Tilted Gold Nanowires, Alessandro Belardini, Marco Centini, Grigore Leahu, David C. Hooper, Roberto Li Voti, Eugenio Fazio, Joseph W. Haus, Andrew Sarangan, Ventsislav K. Valev, Concita Sibilia 2017 Sapienza Università di Roma

Chiral Light Intrinsically Couples To Extrinsic/Pseudo-Chiral Metasurfaces Made Of Tilted Gold Nanowires, Alessandro Belardini, Marco Centini, Grigore Leahu, David C. Hooper, Roberto Li Voti, Eugenio Fazio, Joseph W. Haus, Andrew Sarangan, Ventsislav K. Valev, Concita Sibilia

Andrew Sarangan

Extrinsic or pseudo-chiral (meta)surfaces have an achiral structure, yet they can give rise to circular dichroism when the experiment itself becomes chiral. Although these surfaces are known to yield differences in reflected and transmitted circularly polarized light, the exact mechanism of the interaction has never been directly demonstrated. Here we present a comprehensive linear and nonlinear optical investigation of a metasurface composed of tilted gold nanowires. In the linear regime, we directly demonstrate the selective absorption of circularly polarised light depending on the orientation of the metasurface. In the nonlinear regime, we demonstrate for the first time how second ...


Chiral Light Intrinsically Couples To Extrinsic/Pseudo-Chiral Metasurfaces Made Of Tilted Gold Nanowires, Alessandro Belardini, Marco Centini, Grigore Leahu, David C. Hooper, Roberto Li Voti, Eugenio Fazio, Joseph W. Haus, Andrew Sarangan, Ventsislav K. Valev, Concita Sibilia 2017 Sapienza Università di Roma

Chiral Light Intrinsically Couples To Extrinsic/Pseudo-Chiral Metasurfaces Made Of Tilted Gold Nanowires, Alessandro Belardini, Marco Centini, Grigore Leahu, David C. Hooper, Roberto Li Voti, Eugenio Fazio, Joseph W. Haus, Andrew Sarangan, Ventsislav K. Valev, Concita Sibilia

Joseph W Haus

Extrinsic or pseudo-chiral (meta)surfaces have an achiral structure, yet they can give rise to circular dichroism when the experiment itself becomes chiral. Although these surfaces are known to yield differences in reflected and transmitted circularly polarized light, the exact mechanism of the interaction has never been directly demonstrated. Here we present a comprehensive linear and nonlinear optical investigation of a metasurface composed of tilted gold nanowires. In the linear regime, we directly demonstrate the selective absorption of circularly polarised light depending on the orientation of the metasurface. In the nonlinear regime, we demonstrate for the first time how second ...


Role Of Antenna Modes And Field Enhancement In Second Harmonic Generation From Dipole Nanoantennas, Domenico de Ceglia, Maria Antonietta Vincenti, Costantino De Angelis, Andrea Locatelli, Joseph W. Haus, Michael Scalora 2017 Charles M. Bowden Research Center

Role Of Antenna Modes And Field Enhancement In Second Harmonic Generation From Dipole Nanoantennas, Domenico De Ceglia, Maria Antonietta Vincenti, Costantino De Angelis, Andrea Locatelli, Joseph W. Haus, Michael Scalora

Joseph W Haus

We study optical second harmonic generation from metallic dipole antennas with narrow gaps. Enhancement of the fundamental-frequency field in the gap region plays a marginal role on conversion efficiency. In the symmetric configuration, i.e., with the gap located at the center of the antenna axis, reducing gap size induces a significant red-shift of the maximum conversion efficiency peak. Either enhancement or inhibition of second-harmonic emission may be observed as gap size is decreased, depending on the antenna mode excited at the harmonic frequency. The second-harmonic signal is extremely sensitive to the asymmetry introduced by gap’s displacements with respect ...


A Dual-Band Koch Fractal Based Printed Monopole Antenna: Parametric Investigation And Simulation Results, Mahmood T. Yassen, Mohammed R. Hussan, Hussain A. Hammas, Ali J. Salim, Jawad K. Ali 2017 Department of Electrical Engineering, University of Technology, Iraq

A Dual-Band Koch Fractal Based Printed Monopole Antenna: Parametric Investigation And Simulation Results, Mahmood T. Yassen, Mohammed R. Hussan, Hussain A. Hammas, Ali J. Salim, Jawad K. Ali

Professor Jawad K. Ali

Fractal geometries are successfully applied to produce antennas with compact sizes and multi-resonant behavior. In this report, a microstrip line fed printed monopole antenna has been introduced as a candidate for use in the dual-band WLAN applications. The radiating element of the proposed antenna is a printed square patch with its sides modified in the form of the 3rd iteration Koch fractal curve. A reduced ground plane is to be etched on the reverse side of the substrate. The presented antennas have shown to offer a dual-band resonant behavior with frequency ratio of about 2.41; resulting in bandwidths, for ...


Design Of Compact Dual-Mode Multiband Bpfs Based On Fractal Stepped-Impedance Ring Resonator, Hadi T. Ziboon, Jawad K. Ali 2017 Department of Electrical Engineering, University of Technology, Iraq

Design Of Compact Dual-Mode Multiband Bpfs Based On Fractal Stepped-Impedance Ring Resonator, Hadi T. Ziboon, Jawad K. Ali

Professor Jawad K. Ali

This report presents the design of new miniaturized multiband microstrip bandpass filters (BPFs) for wireless communication applications. The presented filter structures are the results of the application of the fractal-based topology together with the stepped impedance resonator (SIR) technique on the conventional square loop resonator. Three microstrip BPFs have been investigated corresponding to the first three Minkowski fractal iterations as applied to the SIR ring resonator. The first bandpass filter, which corresponds to the zero fractal iteration, has been designed at 5.8 GHz for wireless local area network (WLAN) applications. The proposed filter has been etched using a substrate ...


Statistical Image Differences, Degradation Features, And Character Distance Metrics, Elisa Barney Smith, Xiaohui Qiu 2017 Boise State University

Statistical Image Differences, Degradation Features, And Character Distance Metrics, Elisa Barney Smith, Xiaohui Qiu

Elisa H. Barney Smith

Document image quality is degraded through processes such as scanning, printing, and photocopying. The resulting bilevel image degradations can be categorized based either on observable degradation features or on degradation model parameters. The image degradation features can be related mathematically to model parameters. In this paper we statistically compare pairs of populations of degraded character images created with different model parameters. The probability that the character populations were degraded by the same model parameters correlates with the relationship between observable degradation features and the model parameters. Two metrics of character difference are used: Hamming distance and moment feature distance. Knowledge ...


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