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Electrical and Computer Engineering
Electrical Engineering and Computer Science Faculty Publications
- Keyword
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- Wavelet transform (15)
- Denoising (11)
- Wavelet transforms (10)
- Image processing (9)
- Algorithms (8)
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- Image fusion (8)
- Higher-order statistics (6)
- Pattern recognition (6)
- Statistical methods (6)
- Artificial neural networks (5)
- Helical Propagation (5)
- Neural networks (5)
- Wavelet (5)
- Wireless sensor networks (5)
- Clustering (4)
- Color night vision (4)
- Correlation (4)
- Feature extraction (4)
- Gaussian noise (4)
- Genetic algorithms (4)
- Helical propagation (4)
- Image database (4)
- Image reconstruction (4)
- Image transform (4)
- Multiple description coding (4)
- Multiplexing (4)
- Multiresolution (4)
- Neural network (4)
- Optical correlation (4)
- Probability (4)
Articles 1 - 30 of 261
Full-Text Articles in Engineering
A Subwavelength Perfect Absorbing Metamaterial Patch Array Coupled With A Molecular Resonance, Michael F. Finch, Brian A. Lail
A Subwavelength Perfect Absorbing Metamaterial Patch Array Coupled With A Molecular Resonance, Michael F. Finch, Brian A. Lail
Electrical Engineering and Computer Science Faculty Publications
A perfectly absorbing metamaterial (PAMM) coupled with vibrational modes has varied applications ranging from surface-enhanced vibrational spectroscopy to biological sensing. This endeavor considers a subwavelength PAMM sensor design and analysis using a commercially available finite element method (FEM) solver and analytically with temporal coupled mode theory (TCMT). A carbon double oxygen bond (C=O) at 52 THz or 1733 cm⁻¹ that resides in poly(methyl methacrylate), PMMA, will be used as a stand-in analyte. Normal mode splitting that results from the resonant coupling between the PAMM and analyte’s molecular resonance is investigated and analyzed.
Optimal Transfer Point Locations In Two-Stage Distribution Systems, Jeffrey A. Mcdougall, Luis Daniel Otero
Optimal Transfer Point Locations In Two-Stage Distribution Systems, Jeffrey A. Mcdougall, Luis Daniel Otero
Electrical Engineering and Computer Science Faculty Publications
Limited range of emerging delivery vehicles, speci cally unmanned aerial systems, creates gaps in last mile retail distribution networks and excludes signi cant numbers of potential customers. Implementing a two-stage distribution process is one approach that eliminates this de cit. However, dispatchers must load the vehicles hauling orders in the initial stage of the process and assign orders for delivery to transfer points in a way that ensures timely arrival while utilizing only the minimum required resources. This paper investigates the capacitated transfer point covering problem which has, until now, been unstudied. The research proposes a mathematical programming model to …
A Compact Energy-Independent Czt-Based Gamma Camera, Youngho Seo, Yonggang Cui, Paul O'Connor, Qiu Huang, Ralph B. James, Debasis Mitra, Hui Pan
A Compact Energy-Independent Czt-Based Gamma Camera, Youngho Seo, Yonggang Cui, Paul O'Connor, Qiu Huang, Ralph B. James, Debasis Mitra, Hui Pan
Electrical Engineering and Computer Science Faculty Publications
Conventional gamma cameras are heavy and occupy large volume for all required hardware components. Direct-conversion solid-state detectors like cadmium zinc telluride (CZT) enable a compact design of gamma cameras. In addition, conventional gamma cameras require different collimators for different gamma-ray photon energies, and the change of collimators between studies sometimes disrupts the workflow. To ease this inconvenience (i.e., bulkiness and collimator change), we have recently developed a compact, CZT-based, energy-independent gamma camera that requires only one collimator to cover a broad range of photon energies. In this paper, we show our design parameters and system specifications as well as simulation …
Virtual Inertia: Current Trends And Future Directions, Ujjwol Tamraker, Dipesh Shrestha, Manisha Maharjan, Bishnu P. Bhattarai, Timothy M. Hansen, Reinaldo Tonkoski
Virtual Inertia: Current Trends And Future Directions, Ujjwol Tamraker, Dipesh Shrestha, Manisha Maharjan, Bishnu P. Bhattarai, Timothy M. Hansen, Reinaldo Tonkoski
Electrical Engineering and Computer Science Faculty Publications
The modern power system is progressing from a synchronous machine-based system towards an inverter-dominated system, with large-scale penetration of renewable energy sources (RESs) like wind and photovoltaics. RES units today represent a major share of the generation, and the traditional approach of integrating them as grid following units can lead to frequency instability. Many researchers have pointed towards using inverters with virtual inertia control algorithms so that they appear as synchronous generators to the grid, maintaining and enhancing system stability. This paper presents a literature review of the current state-of-the-art of virtual inertia implementation techniques, and explores potential research directions …
A Hybrid Phononic Waveguide Using Multilayer Structure At Mid-Infrared, Al-Amri Asma, Michael F. Finch, Claudio Augusto Barreto Saunders Filho, Brian A. Lail
A Hybrid Phononic Waveguide Using Multilayer Structure At Mid-Infrared, Al-Amri Asma, Michael F. Finch, Claudio Augusto Barreto Saunders Filho, Brian A. Lail
Electrical Engineering and Computer Science Faculty Publications
Surface phonon polaritons, SPhPs, result from the coupling or interaction of light with a phonon resonance. There has been extensive research into utilizing surface plasmon polaritons, SPPs, for subwavelength confinement of propagating waveguide modes for photonic integrated circuits. This work investigates the use of a multilayer system or insulatormetal-insulator (IMI) heterostructure as a SPhP-enhanced infrared waveguide where the metal response is due to phonons in a polar dielectric's Reststrahlen band. In addition, an IMI heterostructure supports types of modes: An even mode and odd mode that have their own unique trade-offs. For the odd mode as the metal film thickness …
Environmental Protection Through Nuclear Energy, Florio Ion T. Petrescu, Antonio Apicella, Relly Victoria V. Petrescu, Samuel Peter Kozaitis, Ronald B. Bucinell, Raffaella Aversa, Taher M. Abu-Lebdeh
Environmental Protection Through Nuclear Energy, Florio Ion T. Petrescu, Antonio Apicella, Relly Victoria V. Petrescu, Samuel Peter Kozaitis, Ronald B. Bucinell, Raffaella Aversa, Taher M. Abu-Lebdeh
Electrical Engineering and Computer Science Faculty Publications
Environmental protection through implementation of green energies is progressively becoming a daily reality. Numerous sources of green energy were introduced in recent years. Although this process initially started with difficulties, it finally resulted in an acceleration and implementation of new green energy technologies. Nonetheless, new major obstacles are emerging. The most worldwide difficult obstacle encountered, especially for wind and photovoltaic electric power plants, is the not regular and predictable green energy production. This study proposes solutions designed to solve this unpleasant aspect of irregular production of green energy. The basic idea refers to the construction of specially designed nuclear power …
Optical Directional Coupler And Mach-Zehnder Interferometer Enhanced Via 4h-Sic Phonons, Michael F. Finch, Claudio A.B. Saunders Filho, Brian A. Lail
Optical Directional Coupler And Mach-Zehnder Interferometer Enhanced Via 4h-Sic Phonons, Michael F. Finch, Claudio A.B. Saunders Filho, Brian A. Lail
Electrical Engineering and Computer Science Faculty Publications
Surface phonon polaritons (SPhPs), similar to it cousin phenomenon surface plasmon polaitons (SPPs), are quasi-neutral particles resulting from light-matter coupling that can provide high modal confinement and long propagation in the mid to long infrared (IR). Mach-Zehnder interferometer (MZI) is a combination of two connected optical directional couplers (ODC). With the use of SPhPs, sub-wavelength feature sizes and modal areas can be achieved and to this end a hybrid SPhP waveguide, where propagation length and modal area can be trade-off, will be employed in the design of an ODC and MZI. This endeavor analyzes and characteristics both an ODC and …
Wavelength Independency Of Spatially Multiplexed Communication Channels In Standard Multimode Optical Fibers, Syed H. Murshid, Gregory L. Lovell, Arnob Hridoy, Gurinder Parhar, Abhijit Chakravarty, Saud F. Alanzi, Bilas Chowdhury
Wavelength Independency Of Spatially Multiplexed Communication Channels In Standard Multimode Optical Fibers, Syed H. Murshid, Gregory L. Lovell, Arnob Hridoy, Gurinder Parhar, Abhijit Chakravarty, Saud F. Alanzi, Bilas Chowdhury
Electrical Engineering and Computer Science Faculty Publications
Spatial domain multiplexing (SDM), also known as space division multiplexing, adds a new degree of photon freedom to existing optical fiber multiplexing techniques by allocating separate radial locations to different channels of the same wavelength as a function of the input launch angle. These independent MIMO channels remain confined to their designated locations while traversing the length of the carrier fiber owing to helical propagation of light inside the fiber core. As a result, multiple channels of the same wavelength can be supported inside a single optical fiber core, thereby allowing spatial reuse of optical frequencies and multiplication of fiber …
Combining Spatial Domain Multiplexing And Orbital Angular Momentum Of Photon-Based Multiplexing To Increase The Bandwidth Of Optical Fiber Communication Systems, Syed H. Murshid, Saud F. Alanzi, Arnob Hridoy, Gregory L. Lovell, Gurinder Parhar, Abhijit Chakravarty, Bilas Chowdhury
Combining Spatial Domain Multiplexing And Orbital Angular Momentum Of Photon-Based Multiplexing To Increase The Bandwidth Of Optical Fiber Communication Systems, Syed H. Murshid, Saud F. Alanzi, Arnob Hridoy, Gregory L. Lovell, Gurinder Parhar, Abhijit Chakravarty, Bilas Chowdhury
Electrical Engineering and Computer Science Faculty Publications
Spatial domain multiplexing/space division multiplexing (SDM) can increase the bandwidth of existing and futuristic optical fibers by an order of magnitude or more. In the SDM technique, we launch multiple singlemode pigtail laser sources of the same wavelength into a carrier multimode fiber at different angles. The launching angles decide the output of the carrier fiber by allocating separate spatial locations for each channel. Each channel follows a helical trajectory while traversing the length of the carrier fiber, thereby allowing spatial reuse of optical frequencies. We launch light from five different single-mode pigtail laser sources (of same wavelength) at different …
Recent Advances In Brain Signal Analysis: Methods And Applications, Victor Hugo C. De Albuquerque, Placido R. Pinheiro, João Paulo Papa, Jorge Manuel R.S. Tavares, Ronaldo Parente De Menezes, Carlos A.S. Oliveira
Recent Advances In Brain Signal Analysis: Methods And Applications, Victor Hugo C. De Albuquerque, Placido R. Pinheiro, João Paulo Papa, Jorge Manuel R.S. Tavares, Ronaldo Parente De Menezes, Carlos A.S. Oliveira
Electrical Engineering and Computer Science Faculty Publications
No abstract provided.
Analysis Of The Fm Radio Spectrum For Secondary Licensing Of Low-Power Short-Range Cognitive Internet Of Things Devices, Derek T. Otermat, Ivica Kostanic, Carlos E. Otero
Analysis Of The Fm Radio Spectrum For Secondary Licensing Of Low-Power Short-Range Cognitive Internet Of Things Devices, Derek T. Otermat, Ivica Kostanic, Carlos E. Otero
Electrical Engineering and Computer Science Faculty Publications
The analysis presented in this paper indicates that the FM radio spectrum is underutilized in the areas of the continental United States that have a population of 100000 or less. These locations have vacant FM radio spectrum of at least 13 MHz with sufficient spectrum spacing between adjacent FM radio channels. The spectrum spacing provides the required bandwidth for data transmission and provides enough bandwidth to minimize interference introduced by neighboring predicted and unpredicted FM radio stations and other low-power short-range Internet of Thing (IoT) devices. To ensure that low-power short-range IoT devices maintain reliable communications vacant radio spectrum, such …
Impedance-Matching Analysis In Ir Leaky-Wave Antennas, Navaneeth Premkumar, Yuancheng Xu, Brian A. Lail
Impedance-Matching Analysis In Ir Leaky-Wave Antennas, Navaneeth Premkumar, Yuancheng Xu, Brian A. Lail
Electrical Engineering and Computer Science Faculty Publications
Planar leaky-wave antennas (LWA) that are capable of full-space scanning have long since been the pursuit for applications including, but not limited to, integration onto vehicles and into cameras for wide-angle of view beam-steering. Such a leaky-wave surface (LWS) was designed for long-wave infrared frequencies with frequency scanning capability. The LWS is based on a microstrip patch array design of a leaky-wave impedance surface and is made up of gold microstrip patches on a grounded zinc sulphide substrate. A 1D composite right/left-handed (CRLH) metamaterial made by periodically stacking a unit cell of the LWS in the longitudinal direction to form …
Infrared Surface Phonon Polariton Waveguides On Sic Substrate, Yuchen Yang, Franklin Muriuki Manene, Brian A. Lail
Infrared Surface Phonon Polariton Waveguides On Sic Substrate, Yuchen Yang, Franklin Muriuki Manene, Brian A. Lail
Electrical Engineering and Computer Science Faculty Publications
Surface plasmon polariton (SPP) waveguides harbor many potential applications at visible and near-infrared (NIR) wavelengths. However, dispersive properties of the metal in the waveguide yields weakly coupled and lossy plasmonic modes in the mid and long wave infrared range. This is one of the major reasons for the rise in popularity of surface phonon polariton (SPhP) waveguides in recent research and micro-fabrication pursuit. Silicon carbide (SiC) is a good candidate in SPhP waveguides since it has negative dielectric permittivity in the long-wave infrared (LWIR) spectral region, indicative that coupling to surface phonon polaritons is realizable. Introducing surface phonon polaritons for …
Multi-Coupled Resonant Splitting With A Nano-Slot Metasurface And Pmma Phonons, Michael F. Finch, Brian A. Lail
Multi-Coupled Resonant Splitting With A Nano-Slot Metasurface And Pmma Phonons, Michael F. Finch, Brian A. Lail
Electrical Engineering and Computer Science Faculty Publications
Coupled-resonances can be used in applications that include, but are not limited to, surface-enhanced infrared spectroscopy (SEIRS), surface-enhanced Raman spectroscopy (SERS), biosensing, and index sensing. Fano resonance in analogue plasmonic systems has been described as the coupling of a bright (superradiant) mode and a dark (subradiant) mode via the near field.Dark and bright mode interactionsareinvestigated with the use of a Fano resonant metamaterial (FRMM) where the metamaterial is a dual nano-slot metasurface on a silicon cavity. The FRMM is numerically simulated using Ansys High Frequency Structure Simulator (HFSS). The FRMM is coupled to the carbon double bond in polymethyl methacrylate …
Collection Efficiency For Millimeter And Submillimeter Wave Antenna-Coupled Detection, Yuancheng Xu, Brian A. Lail
Collection Efficiency For Millimeter And Submillimeter Wave Antenna-Coupled Detection, Yuancheng Xu, Brian A. Lail
Electrical Engineering and Computer Science Faculty Publications
The goal in the design of an efficient and low-noise antenna coupled receiver is to achieve a maximal capture cross section for the incident electromagnetic radiation compared to the dimensions of the sub-wavelength sized sensor loading the antenna. Collection efficiency captures this concept of power output/input and is made up of several subefficiencies. In the ideal case all of the available, incident power is collected and transferred to the load. However, many of the fundamental limits of antennas are based on theory describing the transmitting mode, whereas certain questions remain open for receiving antennas. Textbook antenna theory predicts that only …
Near Real-Time Operation Of Public Image Database For Ground Vehicle Navigation, Ehsan A. Ali, Samuel Peter Kozaitis
Near Real-Time Operation Of Public Image Database For Ground Vehicle Navigation, Ehsan A. Ali, Samuel Peter Kozaitis
Electrical Engineering and Computer Science Faculty Publications
An effective color night vision system for ground vehicle navigation should operate in near real-time to be practical. We described a system that uses a public database as a source of color information to colorize night vision imagery. Such an approach presents several problems due to differences between acquired and reference imagery. Our system performed registration, colorizing, and reference updating in near real-time in an effort to help drivers of ground vehicles during night to see a colored view of a scene.
Improved Colorization For Night Vision System Based On Image Splitting, Ehsan A. Ali, Samuel Peter Kozaitis
Improved Colorization For Night Vision System Based On Image Splitting, Ehsan A. Ali, Samuel Peter Kozaitis
Electrical Engineering and Computer Science Faculty Publications
The success of a color night navigation system often depends on the accuracy of the colors in the resulting image. Often, small regions can incorrectly adopt the color of large regions simply due to size of the regions. We presented a method to improve the color accuracy of a night navigation system by initially splitting a fused image into two distinct sections before colorization. We split a fused image into two sections, generally road and sky regions, before colorization and processed them separately to obtain improved color accuracy of each region. Using this approach, small regions were colored correctly when …
A Combined Method For Segmentation And Registration For An Advanced And Progressive Evaluation Of Thermal Images, Emilio Z. Barcelos, Walmir Matos Caminhas, Eraldo Ribeiro, Eduardo Mendonça Pimenta, Reinaldo Martinez Palhares
A Combined Method For Segmentation And Registration For An Advanced And Progressive Evaluation Of Thermal Images, Emilio Z. Barcelos, Walmir Matos Caminhas, Eraldo Ribeiro, Eduardo Mendonça Pimenta, Reinaldo Martinez Palhares
Electrical Engineering and Computer Science Faculty Publications
In this paper, a method that combines image analysis techniques, such as segmentation and registration, is proposed for an advanced and progressive evaluation of thermograms. The method is applied for the prevention of muscle injury in high-performance athletes, in collaboration with a Brazilian professional soccer club. The goal is to produce information on spatio-temporal variations of thermograms favoring the investigation of the athletes’ conditions along the competition. The proposed method improves on current practice by providing a means for automatically detecting adaptive body-shaped regions of interest, instead of the manual selection of simple shapes. Specifically, our approach combines the optimization …
Mode Splitting And Resonant Coupling Between A Slot Metasurface And Pmma, Michael F. Finch, Brian A. Lail
Mode Splitting And Resonant Coupling Between A Slot Metasurface And Pmma, Michael F. Finch, Brian A. Lail
Electrical Engineering and Computer Science Faculty Publications
A slot metasurface (metascreen) designed to have resonance that couples with the 1733 cmˉ¹ absorption peak of the C=O molecular bond of PMMA (polymethyl methacrylate) is presented. The metasurface is made of a gold layer perforated with periodically-placed slots and stood off above a reflective ground plane with silicon substrate. The metasurface is modeled using ANSYS HFSS and including measured optical properties for gold, silicon and PMMA in the infrared spectrum. PMMA forms a thin overcoat and exhibits a strong absorption resonance at wavenumber 1733 cmˉ¹. Coupling between the metasurface and PMMA is observed via normal mode splitting. Mode splitting …
Concentric Circles Based Simple Optical Landing Aid For Vertical Takeoff And Landing Aircrafts, Syed H. Murshid, Rayan Enaya
Concentric Circles Based Simple Optical Landing Aid For Vertical Takeoff And Landing Aircrafts, Syed H. Murshid, Rayan Enaya
Electrical Engineering and Computer Science Faculty Publications
Vertical takeoff and landing (VTOL) aircrafts such as helicopters and drones, add a flexible degree of operation to airborne vehicles. In order to operate these devices in low light situations, where it is difficult to determine slope of the landing surface, a lightweight and standalone device is proposed here. This small optical device can be easily integrated into current VTOL systems. An optical projector consisting of low power, light weight, solid state laser along with minimal optics is utilized to illuminate the landing surface with donut shaped circles and coaxial centralized dot. This device can placed anywhere on the aircraft …
Circular Polarized Leaky Wave Surface, Franklin Muriuki Manene, Brian A. Lail, Edward C. Kinzel
Circular Polarized Leaky Wave Surface, Franklin Muriuki Manene, Brian A. Lail, Edward C. Kinzel
Electrical Engineering and Computer Science Faculty Publications
A circular polarized (CP) infrared (IR) leaky wave surface design is presented. The metasurface consists of an array of rectangular patches connected by microstrip and operating over the long-wave infrared (LWIR) spectrum with directional wave emission and absorption. The surface is composed of periodically aligned arrays of sub-wavelength metal patches separated from a ground plane by a dielectric slab. The design combines the features of the conventional patch and leaky wave antenna leading to a metasurface that preferentially emits CP IR radiation by use of axial asymmetrical unit cells. This is a deviation from reported structures that mainly employ a …
Analysis Of Spatial Domain Multiplexing/Space Division Multiplexing (Sdm) Based Hybrid Architectures Operating In Tandem With Wavelength Division Multiplexing, Syed H. Murshid, Gregory L. Lovell, Bilas Chowdhury, Arnob Hridoy, Gurinder Parhar, Abhijit Chakravarty, Saud F. Alanzi
Analysis Of Spatial Domain Multiplexing/Space Division Multiplexing (Sdm) Based Hybrid Architectures Operating In Tandem With Wavelength Division Multiplexing, Syed H. Murshid, Gregory L. Lovell, Bilas Chowdhury, Arnob Hridoy, Gurinder Parhar, Abhijit Chakravarty, Saud F. Alanzi
Electrical Engineering and Computer Science Faculty Publications
Spatial domain multiplexing (SDM) also known as space division multiplexing adds a new degree of photon freedom to existing optical fiber multiplexing techniques by allocating separate radial locations to different MIMO channels as a function of the input launch angle. These independent MIMO channels remain confined to the designated location while traversing the length of the carrier fiber, due to helical propagation of light inside the fiber core. The SDM technique can be used in tandem with other multiplexing techniques, such as time division multiplexing (TDM), and wavelength division multiplexing in hybrid optical communication schemes, to achieve higher optical fiber …
Analysis Of An All Optical De-Multiplexer Architecture Utilizing Bevel Design For Spatially Multiplexed Optical Fiber Communication Systems, Syed H. Murshid, Michael F. Finch, Gregory L. Lovell
Analysis Of An All Optical De-Multiplexer Architecture Utilizing Bevel Design For Spatially Multiplexed Optical Fiber Communication Systems, Syed H. Murshid, Michael F. Finch, Gregory L. Lovell
Electrical Engineering and Computer Science Faculty Publications
Spatial domain multiplexing (SDM) is a system that allows multiple channels of light to traverse a single fiber, utilizing separate spatial regions inside the carrier fiber, thereby applying a new degree of photon freedom for optical fiber communications. These channels follow a helical pattern, the screen projection of which is viewable as concentric rings at the output end of the system. The MIMO nature of the SDM system implies that a typical pin-diode or APD will be unable to distinguish between these channels, as the diode will interpret the combination of the SDM signals from all channels as a single …
Analysis And Comparison Of Experimental And Simulated Results For An Omnidirectional Free Space Optical Receiver Architecture, Syed H. Murshid, Gregory L. Lovell, Michael F. Finch
Analysis And Comparison Of Experimental And Simulated Results For An Omnidirectional Free Space Optical Receiver Architecture, Syed H. Murshid, Gregory L. Lovell, Michael F. Finch
Electrical Engineering and Computer Science Faculty Publications
Lasercomm or Free Space Optical (FSO) communication has the potential to provide fiber optic data rates without the need for wired physical connectivity. This paper investigates the feasibility of an Omnidirectional FSO (O-FSO) communications link that utilizes fiber bundles for improved omni-directionality and compares experimental data with modeled results. Current state of the art O-FSO link ranges are limited to 100 meters or so, with data rates of only a few 100 kbits/sec. The proposed architecture is formed from commercially available fiber bundle that collects omnidirectional light due to the hemispheric nature of the fiber bundle by exploiting the acceptance …
Universal Liquid Level Sensor Employing Fresnel Coefficient Based Discrete Fiber Optic Measurement Technique, Syed H. Murshid
Universal Liquid Level Sensor Employing Fresnel Coefficient Based Discrete Fiber Optic Measurement Technique, Syed H. Murshid
Electrical Engineering and Computer Science Faculty Publications
A compact and light weight liquid-level-measuring system based on fiber-optics sensor technology is presented as alternative to systems based on float gauges and other conventional level sensors for liquids that pose fire, corrosion and explosion hazards. These Fresnel reflection based fiber-optic sensors are inherently safer because they do not include electrical connections inside fuel/chemical tanks, and they exploit changes in internal reflection of guided electromagnetic modes as a result of contact between the outer surface of optical fiber and a liquid. Discrete changes in light transmission/reflection are used to indicate that liquid has come into contact with a suitably designed …
An Order Of Magnitude Improvement In Optical Fiber Bandwidth Using Spatial Domain Multiplexing/Space Division Multiplexing (Sdm) In Conjunction With Orbital Angular Momentum (Oam), Syed H. Murshid, Saud F. Alanzi, Arnob Hridoy, Gregory L. Lovell, Gurinder Parhar, Abhijit Chakravarty, Bilas Chowdhury
An Order Of Magnitude Improvement In Optical Fiber Bandwidth Using Spatial Domain Multiplexing/Space Division Multiplexing (Sdm) In Conjunction With Orbital Angular Momentum (Oam), Syed H. Murshid, Saud F. Alanzi, Arnob Hridoy, Gregory L. Lovell, Gurinder Parhar, Abhijit Chakravarty, Bilas Chowdhury
Electrical Engineering and Computer Science Faculty Publications
Spatial Domain Multiplexing/Space Division Multiplexing (SDM) can increase the bandwidth of existing and futuristic optical fibers by an order of magnitude or more. In the SDM technique, we launch multiple single mode pigtail laser sources of same wavelength into a carrier fiber at different angles. The launching angles decide the output of the carrier fiber by allocating separate spatial locations for each channel. Each channel follows a helical trajectory while traversing the length of the carrier fiber, thereby allowing spatial reuse of optical frequencies. In this endeavor we launch light from five different single mode pigtail laser sources at different …
Enhancing Thermal Video Using A Public Database Of Images, Hemin Qadir, Samuel Peter Kozaitis, Ehsan A. Ali
Enhancing Thermal Video Using A Public Database Of Images, Hemin Qadir, Samuel Peter Kozaitis, Ehsan A. Ali
Electrical Engineering and Computer Science Faculty Publications
We presented a system to display nightime imagery with natural colors using a public database of images. We initially combined two spectral bands of images, thermal and visible, to enhance night vision imagery, however the fused image gave an unnatural color appearance. Therefore, a color transfer based on look-up table (LUT) was used to replace the false color appearance with a colormap derived from a daytime reference image obtained from a public database using the GPS coordinates of the vehicle. Because of the computational demand in deriving the colormap from the reference image, we created an additional local database of …
Path Optimization For Oil Probe, O'Neal Smith, Mark Rahmes, Mark Blue, Adrian M. Peter
Path Optimization For Oil Probe, O'Neal Smith, Mark Rahmes, Mark Blue, Adrian M. Peter
Electrical Engineering and Computer Science Faculty Publications
We discuss a robust method for optimal oil probe path planning inspired by medical imaging. Horizontal wells require three-dimensional steering made possible by the rotary steerable capabilities of the system, which allows the hole to intersect multiple target shale gas zones. Horizontal "legs" can be over a mile long; the longer the exposure length, the more oil and natural gas is drained and the faster it can flow. More oil and natural gas can be produced with fewer wells and less surface disturbance. Horizontal drilling can help producers tap oil and natural gas deposits under surface areas where a vertical …
Color Night Vision System For Ground Vehicle Navigation, Ehsan A. Ali, Hemin Qadir, Samuel Peter Kozaitis
Color Night Vision System For Ground Vehicle Navigation, Ehsan A. Ali, Hemin Qadir, Samuel Peter Kozaitis
Electrical Engineering and Computer Science Faculty Publications
Operating in a degraded visual environment due to darkness can pose a threat to navigation safety. Systems have been developed to navigate in darkness that depend upon differences between objects such as temperature or reflectivity at various wavelengths. However, adding sensors for these systems increases the complexity by adding multiple components that may create problems with alignment and calibration. An approach is needed that is passive and simple for widespread acceptance. Our approach uses a type of augmented display to show fused images from visible and thermal sensors that are continuously updated. Because the raw fused image gave an unnatural …
Colormap Development For Night Vision From Synthetic Imagery, H. A. Qadir, Samuel Peter Kozaitis
Colormap Development For Night Vision From Synthetic Imagery, H. A. Qadir, Samuel Peter Kozaitis
Electrical Engineering and Computer Science Faculty Publications
We presented a method for colorizing fused imagery using a synthetic image as the color source. Imagery acquired at night from two sensors with different spectral bands were fused into a single image. We used a color transfer method based on a look-up table approach to change the false color appearance of the fused image to a natural appearance. Because the resulting multiband fused image is highly dependent on the colors is a reference image, we generated a synthetic reference image. We showed that this approach could lead to more realistic color representation for images acquired in dark environments.