Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 30 of 68
Full-Text Articles in Entire DC Network
Excitation Band-Gap Tuning Of Dopant Based Quantum Dots With Core-Inner Shell-Outer Shell Div, Swadeshmukul Santra, Soumitra Kar
Excitation Band-Gap Tuning Of Dopant Based Quantum Dots With Core-Inner Shell-Outer Shell Div, Swadeshmukul Santra, Soumitra Kar
UCF Patents
A composition and method for fabricating and tuning a dopant based core-shell semiconductor having a quantum dot core with an excitation band-gap are provided. A quantum dot core composed of an alloy of cadmium sulfide (CdS) and zinc sulfide (ZnS) as semi-conductor materials include a dopant of manganese (Mn) added to the core and an outer shell of zine sulfide (ZnS). The dopant based core/shell quantum dot semiconductor of the present invention allows the fine tuning of an excitation band-gap, covering a wide range (from 2.4 eV to ~4 eV). When doped with Mn, these alloy Qdots emit bright yellow/orange …
Systems And Methods For Adaptive Interference Cancellation, Guifang Li
Systems And Methods For Adaptive Interference Cancellation, Guifang Li
UCF Patents
In one embodiment a communications system includes an RF receiver that receives a desired signal and the interference signal, a first phase modulator that receives the desired signal and the interference signal from the RF receiver and generates a resulting optical signal, a second phase modulator that generates a modulated optical signal relative to an inverse interference signal and transmits the modulated optical signal to the first phase modulator, and a detector that receives the resulting optical signal from the first phase modulator and detects the desired signal, wherein the resulting optical signal comprises a modulated optical signal generated by …
Transflective Liquid Crystal Display Using Separate Transmissive And Reflective Liquid Crystal Cells And Materials With Single Cell Gap, Shin-Tson Wu, Qi Hong, Yung-Hsun Wu
Transflective Liquid Crystal Display Using Separate Transmissive And Reflective Liquid Crystal Cells And Materials With Single Cell Gap, Shin-Tson Wu, Qi Hong, Yung-Hsun Wu
UCF Patents
A transflective liquid crystal display (TLCD) using separate transmissive (T) and reflective (R) cells in which two liquid crystal materials with different birefringence changes are used. The birefringence change of the R region is half of the birefringence change of the T region. In this case, a single cell gap is possible and identical transmittance and reflectance for R and T is obtained. It is applicable to various reflective LC modes, and the fabrication methods are simple.
High Efficiency Solar Powered Fans, Danny Parker, Bart Hibbs
High Efficiency Solar Powered Fans, Danny Parker, Bart Hibbs
UCF Patents
Highly efficient solar fans used in portable and built in configurations. A ventilation fan can be used for exhausting air out from underneath roofs, and/or for being portable in use and application. The fan can include optimized airflow blades having a twisted configuration that can move at a rotational speed operation of up to approximately 500 rpm. The approximately 15 inch diameter twisted blades can be pre-milded on a hub that together form a single molded unit of plastic. They can also be fabricated using metal. The unit can be mounted in an exhaust outlet having a conical diffuser on …
Image Reconstruction For A General Circle-Plus Trajectory, Alexander Katsevich
Image Reconstruction For A General Circle-Plus Trajectory, Alexander Katsevich
UCF Patents
Methods, apparatus and systems for an exact filtered back projection process for circle-plus trajectories, which consist of two components: C and L. The first component C, is analogous to a circle in the traditional circle-plus trajectories, is any closed (not necessarily planar) continuous curve. The second component L is almost any continuous curve. The only condition is that L starts below C and ends above C. The process does not depend on the global properties of L. When the source is located on L, one needs to know only how C projects onto the corresponding detector and the properties of …
Lightweight Portable Training Device To Simulate Kayaking, Ronald Eaglin
Lightweight Portable Training Device To Simulate Kayaking, Ronald Eaglin
UCF Patents
Methods and devices for kayak training and/or exercising. One embodiment can use two PVC type pipes (one shorter than the other) in a parallel configuration. A flexible bungee type stretchable cord can be passed through the small pipe and have ends that are each attempted to opposite ends of the larger pipe. Ends of another stretchable cord are each fixable attached to ends of the small pipe with a mid portion of the second bungee cord attached to a fixably nonmoveable member such as a door knob and the like. A user sitting down can grip the larger pipe with …
Method And System To Attach Carbon Nanotube Probe To Scanning Probe Microscopy Tips, Lee Chow, Guang Chai
Method And System To Attach Carbon Nanotube Probe To Scanning Probe Microscopy Tips, Lee Chow, Guang Chai
UCF Patents
An easy and controllable method and system to attach a carbon nanotube to a scanning probe tip such as a scanning probe microscopy (SPM) tip using a focus ion beam (FIB) technique. The method and system includes selecting a carbon fiber by a Focus Ion Beam micromanipulator, picking up the carbon fiber with the nanotube tip, forming a slot on an SPM tip, and inserting the carbon fiber with the nanotube tip into the slot.
Mode-Locked Optical Amplifier As A Source For A Wdm-Wdm Hierarchy Architecture, Peter Delfyett, Thomas Banwell, Shahab Etemad, Stefano Galli, Janet Lehr Jackel, Ronald Menedez, Paul Toliver
Mode-Locked Optical Amplifier As A Source For A Wdm-Wdm Hierarchy Architecture, Peter Delfyett, Thomas Banwell, Shahab Etemad, Stefano Galli, Janet Lehr Jackel, Ronald Menedez, Paul Toliver
UCF Patents
No abstract provided.
Silicon-Controlled Rectifier (Scr) Device For High-Voltage Electrostatic Discharge (Esd) Applications, Juin Liou, Zhiwei Liu, James Vinson
Silicon-Controlled Rectifier (Scr) Device For High-Voltage Electrostatic Discharge (Esd) Applications, Juin Liou, Zhiwei Liu, James Vinson
UCF Patents
A silicon controlled rectifier (SCR) device having a high holding voltage includes a PNP transistor and an NPN transistor, each transistor having both p-type and n-type dopant regions in their respective emitter areas. The device is particularly suited to high voltage applications, as the high holding voltage provides a device which is more resistant to latchup subsequent to an electrostatic discharge event compared to devices having a low holding voltage.
Systems And Methods For Providing Compact Illumination In Head Mounted Displays, Jannick Rolland, Yonggang Ha, Vesselin Shaoulov
Systems And Methods For Providing Compact Illumination In Head Mounted Displays, Jannick Rolland, Yonggang Ha, Vesselin Shaoulov
UCF Patents
Disclosed are systems and methods for providing illumination in a head mounted display. In one embodiment a method includes emitting light from a plurality of sources at a plurality of wavelengths and transmitting the light from the plurality of sources to a first device. The method further includes combining the light, utilizing the first device, from the plurality of sources into a combined light signal and creating telecentricity in the combined light signal. The method also includes receiving a telecentric light signal on a display surface. In one embodiment the system includes a light source, a hybrid reflective structure configured …
Delayed Offset Multi-Track Ofc Sensors And Tags, Donald Malocha, Derek Puccio
Delayed Offset Multi-Track Ofc Sensors And Tags, Donald Malocha, Derek Puccio
UCF Patents
Apparatus, systems, devices and methods for providing an orthognal frequency coding technique for surfaced acoustic wave sensors incorporating the use of multiple parallel acoustic tracks to provide increased coding by phase shifting and delaying a code sequence. The surface acoustic wave sensor includes parallel tracks with multiple reflectors with differing delay offsets to form a complex code sequence. The reflectors may be uniform, but alternatively could include fingers withdrawen, have reflector position modulation, differing frequencies or be spatially weighted.
Passive Nutrient Removal Material Mixes Div A, Martin Wanielista, Ni-Bin Chang
Passive Nutrient Removal Material Mixes Div A, Martin Wanielista, Ni-Bin Chang
UCF Patents
Method or process for rating, selecting, testing and verifying a sorption media for wet and dry ponds and green roof applications. In addition the compositions of the sorption media mixture for growing plants, filtration, etc.
Optical Coagulation Monitor And Method Of Use, Aristide Dogariu
Optical Coagulation Monitor And Method Of Use, Aristide Dogariu
UCF Patents
An optical coagulation monitor and the method of monitoring blood coagulation status are disclosed. The method includes positioning a sample probe containing an optical fiber within a circulating blood; transmitting a low-coherence light through the optical fiber into the blood; detecting dynamic light scatter signals generated by the blood within a coherence volume and received through the optical fiber; analyzing the dynamic light scatter signals in comparison to a predetermined coagulation criterion; and reporting the coagulation status of the blood. The method can be used for monitoring blood coagulation status in vivo or in vitro in real time. Further disclosed …
Apparatus And Method For Increasing Thermal Conductivity Of A Substrate., Aravinda Kar, Nathaniel Quick
Apparatus And Method For Increasing Thermal Conductivity Of A Substrate., Aravinda Kar, Nathaniel Quick
UCF Patents
An apparatus and method is disclosed for increasing the thermal conductivity in a substrate of a non-wide bandgap material comprising the steps of directing a thermal energy beam onto the substrate in the presence of a first doping gas for converting a region of the substrate into a wide bandgap material to enhance the thermal conductivity of the substrate for cooling the non-wide bandgap material. In one example, the invention is incorporated into a carbon rich layer formed within the wide bandgap material. In another example, the invention is incorporated into a carbon rich layer formed within the wide bandgap …
Partially Passivated Quantum Dots, Process For Making, And Sensors Therefrom., Swadeshmukul Santra, Yang Heesun, Paul Halloway, Subir Sabui
Partially Passivated Quantum Dots, Process For Making, And Sensors Therefrom., Swadeshmukul Santra, Yang Heesun, Paul Halloway, Subir Sabui
UCF Patents
A partially passivating core shell particle includes a luminescent nanocrystal core, and a partially passivating semiconducting core shell on a surface of the nanocrystal. The shell allows selected analytes to alter a luminescent response of the core shell particle. a quantum dot-based sensing system includes at least one partially passivating core shell particle, a light source for irradiating the partially passivating core shell particle, and a light detector for receiving emissions from the particle, wherein emissions from the core shell particle chance in response to the presence of at least one analyte.
Composite Cavity For Enhanced Efficiency Of Up Conversion., Michael Bass, Dennis Deppe
Composite Cavity For Enhanced Efficiency Of Up Conversion., Michael Bass, Dennis Deppe
UCF Patents
Methods, apparatus and systems for an up-converter resonant cavity light emitting diode device includes a semiconductor light source, an up-converter to form the light emitter with up-converting materials and an electrical source coupled with the semiconductor light source for providing electrical energy to the semiconductor light source to provide a desired wavelength emitted light. The semiconductor light source is a resonant cavity light emitting diode or laser that emits an approximately 975 nm wavelength to provide electrical and optical confinement to the semiconductor light source to fonn a resonant cavity up-converting light emitting diode (UCIRCLED). Rows and columns of electrodes …
Method And Apparatus For Hydrogen Production From Water, Nazim Muradov
Method And Apparatus For Hydrogen Production From Water, Nazim Muradov
UCF Patents
A method, apparatuses and chemical compositions are provided for producing high purity hydrogen from water. Metals or alloys capable of reacting with water and producing hydrogen in aqueous solutions at ambient conditions are reacted with one or more inorganic hydrides capable of releasing hydrogen in aqueous solutions at ambient conditions, one or more transition metal compounds are used to catalyze the reaction and, optionally, one or more alkali metal-based compounds. The metal or alloy is preferably aluminum. The inorganic hydride is from a family of complex inorganic hydrides; most preferably, NaBH4. The transition metal catalyst is fiom the groups VIII …
Vertical Alignment Liquid Crystal Displays With High Transmittance And Wide View Angle, Shin-Tson Wu, Qi Hong, Ruibo Lu, Xinzhang Wu
Vertical Alignment Liquid Crystal Displays With High Transmittance And Wide View Angle, Shin-Tson Wu, Qi Hong, Ruibo Lu, Xinzhang Wu
UCF Patents
Structures, devices, systems and methods of using multi-domain vertical alignment liquid crystal displays with high transmittance, high contrast ratio and wide view angle in which at least one of the electrode substrates has circular or ring-shaped openings, such as holes or slits. Circular or ring-shaped patterns for openings and electrodes have not been used in the construction of a liquid crystal display. The new multi-domain vertical alignment (MDVA) liquid crystal display is particularly suitable for liquid crystal display television and computer monitor applications.
Universal Chloroplast Integration And Expression Vectors, Transformed Plants And Products Thereof (Con), Henry Daniell
Universal Chloroplast Integration And Expression Vectors, Transformed Plants And Products Thereof (Con), Henry Daniell
UCF Patents
The invention provides universal chloroplast integration and expression vectors which are competent to stably transform and integrate genes of interest into chloroplast genome of multiple species of plants. Transformed plants and their progeny are provided. Monocotyledonous and dicotyledonous plants are transformed which have never been transformed heretofore. Plants transformed with a synthetic gene express valuable biodegradable protein-based polymers (PBPs). Transformed plants produce high value molecules. Resistance is provided to agricultural crops against the major classes of chemical herbicides. Herbicide resistance is used as a lethal selectable marker for chloroplast transformation. The transformed plants are capable of expressing in addition to …
High Precision Measurement Of The Free Spectral Range Of An Etalon, Peter Delfyett, Sangyoun Gee, Sarper Ozharar, Franklyn Quinlan
High Precision Measurement Of The Free Spectral Range Of An Etalon, Peter Delfyett, Sangyoun Gee, Sarper Ozharar, Franklyn Quinlan
UCF Patents
Methods, systems, apparatus and devices for using a modified PDH technique to measure the FSR of an etalon with one part per l0^4 precision. This method is especially useful for etalons with small FSR (less than 10 GHz) because this method does not require a high resolution OSA or tuneable laser. As the ITU grid for DWDM becomes denser, this method will have a larger impact on the FSR measurement of etalons.
Marker Free Transgenic Plants: Engineering The Chloroplast Genome Without The Use Of Antibiotic Selection, Henry Daniell
Marker Free Transgenic Plants: Engineering The Chloroplast Genome Without The Use Of Antibiotic Selection, Henry Daniell
UCF Patents
The present invention provides for a method to circumvent the problem of using antibiotic resistant selectable markers. In particular, target plants are transformed using a plastid vector which contains heterologous DNA sequences coding for a phytotoxin detoxifying enzyme or protein. The selection process involves converting a antibiotic-free phytotoxic agent by the expressed phytotoxin detoxifying enzyme or protein to yield a nontoxic compound. The invention provides for various methods to use antibiotic-free selection in chloroplast transformation.
Room Temperature Hydrogen Sensor, Hyoung Cho, Lawrence Ludwig, Sudipta Seal, Satyajit Shukla
Room Temperature Hydrogen Sensor, Hyoung Cho, Lawrence Ludwig, Sudipta Seal, Satyajit Shukla
UCF Patents
A sensor for selectively determining the presence and measuring the amount of hydrogen in the vicinity of the sensor. The sensor comprises a MEMS device coated with a nanostructured thin film of indium oxide doped tin oxide with an over layer of nanostructured barium cerate with platinum catalyst nanoparticles. Initial exposure to a UV light source, at room temperature, causes burning of organic residues present on the sensor surface and provides a clean surface for sensing hydrogen at room temperature. A giant room temperature hydrogen sensitivity is observed after making the UV source off. The hydrogen sensor of the invention …
Excitation Band-Gap Tuning Of Dopant Based Quantum Dots With Core-Inner Shell-Outer Shell Div, Swadeshmukul Santra, Soumitra Kar
Excitation Band-Gap Tuning Of Dopant Based Quantum Dots With Core-Inner Shell-Outer Shell Div, Swadeshmukul Santra, Soumitra Kar
UCF Patents
A composition and method for fabricating and tuning a dopant based core-shell semiconductor having a quantum dot core composed of an alloy of cadmium sulfide (CdS) and zinc sulfide (ZnS) as semi-conductor materials include a dopant of maganese (Mn) added to the core and outer shell of zinc sulfide (ZnS). The dopant based core/shell quantum dot semiconductor of the present invention allows the fine tuning of an excitation band-gap, covering a wide range (from 2.4 eV to approximately 4 eV). When doped with Mn, these alloy Qdots emit bright yellow/orange light. Tuning of the exicitation band is accomplished by changing …
Extreme Optical Pulse Stretching Amplification And Compression With Active Dispersion Tuning, Peter Delfyett, Scott Rozzo
Extreme Optical Pulse Stretching Amplification And Compression With Active Dispersion Tuning, Peter Delfyett, Scott Rozzo
UCF Patents
Methods and systems for optical chirped pulse amplification and phase dispersion, the system including an active dispersion controller for receiving an input optical pulse from a modelocked laser and controlling a third and fourth order dispersion property of the input optical pulse to produce an optical output pulses, a stretching re-circulating loop for stretching the optical output pulses in time, an optical amplifier for amplifying the stretched optical output pulses, a compressing re-circulating loop for compressing the amplified stretched optical output pulse to produce a compressed optical output pulse, and a feedback loop for feeding a feedback optical signal to …
Weighted Saw Reflector Gratings For Orthogonal Frequency Coded Saw Id Tags And Sensors, Donald Malocha, Derek Puccio
Weighted Saw Reflector Gratings For Orthogonal Frequency Coded Saw Id Tags And Sensors, Donald Malocha, Derek Puccio
UCF Patents
Weighted surface acoustic wave reflector gratings for coding identification tags and sensors to enable unique sensor operation and identification for a multi-sensor environment. In an embodiment, the weighted reflectors are variable while in another embodiment the reflector gratings are apodized. The weighting technique allows the designer to decrease reflectivity and allows for more chips to be implemented in a device and, consequently, more coding diversity. As a result, more tags and sensors can be implemented using a given bandwidth when compared with uniform reflectors. Use of weighted reflector gratings with OFC makes various phase shifting schemes possible, such as in-phase …
Plastid Genetic Engineering Via Somatic Embryogenisis, Henry Daniell, Shashi Kumar, Shashi Kumar
Plastid Genetic Engineering Via Somatic Embryogenisis, Henry Daniell, Shashi Kumar, Shashi Kumar
UCF Patents
A method of transforming plant plastids and regenerating fertile transplastomic plants by somatic embryogenesis is disclosed. The method involves transforming a plant plastid in a plant cell capable of being regenerated through somatic embryogenesis with a plastid expression cassette comprising one or more selectable marker genes that express in both green and non-green tissue and in light and dark conditions wherein the selectable marker plant cell is cultured in the presence of the plant cell to a selection agent. The transplastomic plant cell is cultured in the presence of the selection agent under conditions to cause the formation of a …
Crystalline Zirconia And Method Of Synthesis, Sudipta Seal, Satyajit Shukla
Crystalline Zirconia And Method Of Synthesis, Sudipta Seal, Satyajit Shukla
UCF Patents
Novel, monodispersed, spherical ZrO.sub.2 particles in the size range of approximately 10 to approximately 600 nm exhibiting metastable tetragonal crystal structure at room temperature and novel methods of preparation. The ZrO.sub.2 particles are approximately 100% in the tetragonal phase at room temperature and can be pure and free of foreign oxides. The novel method can include mixing zirconium-alkoxide and an alcohol, forming preparation one, followed by separately dissolving completely de-ionized water and a polymeric steric stabilizer in an alcohol forming preparation two. Next the preparations can be mixed with vigorous stirring while subjecting the materials to hydrolysis and condensation reactions …
Shape Memory Thermal Conduction Switch, Rajan Vaidyanathan, Vinu Krishnan, William Notardonato
Shape Memory Thermal Conduction Switch, Rajan Vaidyanathan, Vinu Krishnan, William Notardonato
UCF Patents
A thermal conduction switch includes a thermally-conductive first member having a first thermal contacting structure for securing the first member as a stationary member to a thermally regulated body or a body requiring thermal regulation. A moveable thermally-conductive second member has a second thermal contacting surface. A thermally conductive coupler is interposed between the first member and the second member. At least one control spring is coupled between the first member and the second member. The control spring includes a NiTiFe comprising shape memory (SM) material that provides a phase change temperature <273 >K, a transformation range <40 >K, and a hysteresis …
Matched Optical Waveforms For Detection And Identification Of Biological Pathogens., Peter Delfyett, Geoffrey Burdge, John Desalvo, Bruce Fitzgerald, Andreas Leven
Matched Optical Waveforms For Detection And Identification Of Biological Pathogens., Peter Delfyett, Geoffrey Burdge, John Desalvo, Bruce Fitzgerald, Andreas Leven
UCF Patents
A method is provided for identifying a contaminant in a gaseous space. The method includes: generating a broadband optical waveform; shaping the optical waveform to match an expected waveform for a known contaminant; and transmitting the shaped optical waveform towards an unknown contaminant. Upon receiving a reflected optical waveform from the unknown contaminant, determining whether the unknown contaminant correlates to the known contaminant based on the reflected waveform.
Carbon Nanotube Collimators: Fabrications And Applications, Lee Chow, Guang Chai, Thomas Schenkel
Carbon Nanotube Collimators: Fabrications And Applications, Lee Chow, Guang Chai, Thomas Schenkel
UCF Patents
Apparatus, methods, systems and devices for fabricating individual CNT collimators. Micron size fiber coated CNT samples are synthesized with chemical vapor deposition method and then the individual CNT collimators are fabricated with focused ion beam technique. Unfocused electron beams are successfully propagated through the CNT collimators. The CNT nano-collimators are used for applications including single ion implantation and in high-energy physics, and allow rapid, reliable testing of the transmission of CNT arrays for transport of molecules.