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Briefs Weapons Systems
High Critical Current in Metal Organic Derived YBCO Films
High-temperature superconducting (HTS) YBCO wire is a versatile technology for a number of military and commercial applications. However, anticipated military applications such as...
Briefs Materials
Fundamental Interaction Between Gold Nanoparticles and DNA
Quantum dots (QDs) and nanoparticles (NPs) are made of metal and/or semiconductor materials with diameters ranging from 5 to 100 nm. The properties of these nanomaterials, which depend on their size and the material they are made from, are usually completely different than the properties of...
Articles Robotics, Automation & Control
Designing Future Autonomous Underwater Vehicles
So far, defense companies have done a credible job fielding Unmanned Underwater Vehicles (UUVs), Autonomous Underwater Vehicles (AUVs), or other water-borne robots to address critical capability...
Briefs Mechanical & Fluid Systems
Parallel Hybrid Vehicles Using Fuzzy Logic Control
A fuzzy logic controller for hybrid vehicles with parallel configuration was proposed. Using the state-of-charge (SOC) of the energy storage, the driver command, and the motor/generator speed, a set of rules was developed. The fuzzy logic controller can determine the split between the electric...
Briefs Mechanical & Fluid Systems
Nozzles for Focusing Aerosol Particles
Several nozzles have been designed to aerodynamically focus aerosol particles into a small-diameter jet, so that individual particles can be illuminated by a laser beam and their light scattering and/or laser-induced fluorescence (LIF) spectra can be measured. An additional nozzle can aerodynamically puff...
Briefs Materials
Dynamic Response and Failure Mechanisms of Layered Ceramic-Elastomer-Polymer/Metal Composites
A thorough study through a combination of ballistic and impact experiments, microscopic failure characterization, and numerical simulations has been carried out in order to decipher the underlying mechanisms involved in the interaction between a blast...
Briefs Manufacturing & Prototyping
Functionalized Silk Materials
T he goal of this work was to exploit the novel structural, physical, and biological features of silk proteins towards functionalization of materials systems generated from this family of protein. A new generation of functional silk systems is sought to provide novel materials with precise control of material features....
Briefs Materials
Biodegradable MEMS Based on Cellulose Paper
Electro-Active Paper(EAPap) has been recognized as a new smart material that can be used for sensors, actuators, biomimetic robots, and smart wallpapers. EAPap is made with cellulose paper by coating...
Briefs Materials
Synthesis of Long-Chain-Branched (LCB) Polysulfones for Multifunctional Transport Membranes
Increasing numbers of technologies are based on the idea of harnessing charge transport for useful processes such as energy harvesting, actuation, and sensing. Although much progress exists based on perfluorosulfonated platforms, new and more complicated...
Briefs Materials
Temperature Effect on Drop-Weight Impact of Hybrid Woven Composites
The main idea of composite material is to combine different materials to produce a new material with performance unattainable by the individual constituents. It gives...
Briefs Manufacturing & Prototyping
Surface-Plasmon-Enhanced Organic Thin-Film Solar Cells
Fabrication of two-dimensional metal nanoparticle arrays was achieved both by thermal annealing and nanosphere lithography techniques, which are both very fast and economic. The surface plasmon resonance of the fabricated nanostructure was analyzed experimentally by optical absorption...
Briefs Manufacturing & Prototyping
Shape Memory Polymer Process Development
This work introduces a simple technique of separately fabricating electrospun short fibers. This technique employs a paper mesh, which is placed between the needle tip and counter electrode of the...
Briefs Mechanical & Fluid Systems
Nonlinear, High-Fidelity, Aeroelastic Analysis for Novel Configurations
Efforts to develop morphing air vehicles with multiple mission capabilities have recently been undertaken by several research teams, including NASA’s Aircraft Morphing program and the Defense Advanced Research Projects Agency’s (DARPA) Morphing Aircraft Structures program....
Briefs Mechanical & Fluid Systems
Membrane Pump for Synthetic Muscle Actuation
A synthetic muscle has been developed that uses inflatable balloons to produce a tensile force from a positive pressurization. Mechanical supply and ducting is used to provide the required pressurization. However, the mechanical supply and ducting that is currently used is limited in several respects. To...
Briefs Materials
Tomographic Electrical Resistance-Based Damage Sensing in Nano-Engineered Composite Structures
Advanced composite materials are increasingly replacing metals in the aerospace industry as they offer weight-saving improvements such as high...
Briefs Materials
Fire Resistance of Geopolymer Concretes
Geopolymer concrete has been proposed as an alternative to Portland cement concrete in applications requiring high degrees of fire resistance, because the intrinsic chemistry of the geopolymer binder does...
Briefs Materials
Outdoor Synthetic Aperture Acoustic Ground Target Measurements
A novel outdoor synthetic aperture acoustic (SAA) system consists of a microphone and loudspeaker traveling along a 6.3-meter rail system. This is an extension of a prior indoor...
Briefs Manufacturing & Prototyping
Micro-Propulsion Devices Made of Low-Temperature Co-Fired Ceramics
In the satellite industry, the trend is towards decreasing the size of satellites and clustering of small satellites. Technological advancements in microelectronics have made it more economical to launch a cluster of satellites with a single vehicle rather than the traditional one...
Briefs Manufacturing & Prototyping
Solution Deposition Methods for Carbon Nanotube Field-Effect Transistors
Extensive research has been done on carbon nanotube field-effect transistors (CNTFETs), which may revolutionize electronics. Single-walled carbon nano-tubes (SWNTs) act as...
Briefs Mechanical & Fluid Systems
Designing a Sensorless Torque Estimator for Direct Torque Control of an Induction Motor
Induction motors often are the preferred choice among industrial motors due to the modern power electronics that improve their speed control. Vitally...
Tech Transfer Reports Materials
Polymer Coating Material Limits Computer Damage Caused by Vibrations
Cornerstone Research Group (Dayton, OH) has developed an organic, polymer-based material that can be directly applied to any circuit board — as well as other metal- and...
Briefs Materials
Templated Synthesis of Aluminum Nanoparticles for Stable Energetic Materials
Reactive nanoparticles as energetic materials have received much recent attention for a variety of existing and/or potential applications. Among more extensively...
Briefs Materials
Real-Time Intelligent Chemical and Biological Nanosensors on a Flexible Platform
The objectives of this research are to examine the feasibility of real-time sensing of chemical and biological species by using the unique materials and electronic...
Briefs Mechanical & Fluid Systems
Eccentric Mounting and Adjustment System for Belt-Driven Devices
This design relates to an eccentric mounting and adjustment (EMA) system for belt driving, or for belt-driven devices, that is installed and operated within the restricted confines of an engine compartment, typically a motor vehicle. It satisfies two essential requirements for...
Briefs Mechanical & Fluid Systems
Lightcraft Propulsion for Launching a Small Satellite
A study of lightcraft propulsion systems in general has led to the conception and analysis of such a system for launching a small (having a mass no more than a few kilograms) satellite into...
Briefs Materials
Nanodomain Model of Polymer-Derived Ceramics
Areport discusses a model developed to explain the unusual properties of polymer- derived ceramics (PDCs), which are so named because they are made by controlled pyrolysis of cross-linked polymers. PDCs are metastable ceramics that have potential to be further developed into high-temperature materials...
Briefs Materials
Performance Evaluation of Commercial Carbon Monofluoride Materials in Lithium Batteries
The performance of six different commercially available carbon monofluoride (CFx) materials was evaluated at four different discharge rates. The physical...
Tech Transfer Reports Materials
Shape-Memory Material Could Improve Prosthetics
A shape-memory composite material developed for satellite antennas could prove useful in prosthetics and next-generation ski boots. The material, identified by the trade name TEMBO®, was...
Briefs Mechanical & Fluid Systems
Stability Analysis of Distributed Engine Control Systems
Full Authority Digital Engine Control (FADEC), based on a centralized architecture framework, is being widely used for gas turbine engine control. However, current FADEC is not able to...
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