| Long-Range Acoustic Doppler Current Profilers for Internal Waves in Straits Experiment (IWISE) |
11 Dec 2012 |
15 pages |
| Authors:
Luc Rainville; Matthew H Alford; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
 | We are interested in the general problems of internal waves and ocean mixing. Knowledge of these is important for advancing the performance of operational and climate models, as well as for understanding local problems such as pollutant dispersal and biological productivity. In the specific case of NLIWs, the currents and displacements of the waves are strong enough to impact undersea operations. We use a combination of several existing instruments, several ... |
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| Space-Time Crystals of Trapped Ions |
15 Oct 2012 |
6 pages |
| Authors:
Tongcang Li; Zhe-Xuan Gong; Zhang-Qi Yin; H T Quan; Xiaobo Yin; Peng Zhang; L Duan; Xiang Zhang; CALIFORNIA UNIV BERKELEY NANOSCALE SCIENCE AND ENGINEERING CENTER
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| Spontaneous symmetry breaking can lead to the formation of time crystals, as well as spatial crystals. Here we propose a space-time crystal of trapped ions and a method to realize it experimentally by confining ions in a ring-shaped trapping potential with a static magnetic field. The ions spontaneously form a spatial ring crystal due to Coulomb repulsion. This ion crystal can rotate persistently at the lowest quantum energy state in ... |
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| Mechanism-Based Modeling of Hydrogen Environment Assisted Cracking (HEAC) in High Strength Alloys for Marine Applications: Prediction of Monel K-500 HEAC for Select Environmental and Mechanical Conditions |
15 Oct 2012 |
142 pages |
| Authors:
John R Scully; Richard P Gangloff; Francisco P Moreno; VIRGINIA UNIV CHARLOTTESVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING
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| The objective of this interdisciplinary research program was to implement quantitative predictive models of hydrogen environment assisted cracking (HEAC) of Monel K-500 in a pseudo-application specific situation. Here the crack growth behavior and component lifetime will be predicted as a function of applied stress, surface condition component geometry (summed into stress intensity variation), as well as metallurgical and environmental conditions (applied cathodic potential in seawater with local pH and potential ... |
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| Infrasound Observations from the Source Physics Experiment (Tests 1 and 2) at the Nevada National Security Site |
Sep 2012 |
12 pages |
| Authors:
Kyle R Jones; Rod W Whitaker; Stephen J Arrowsmith; SANDIA NATIONAL LABS ALBUQUERQUE NM
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| The overall mission of the National Center for Nuclear Security (NCNS) Source Physics Experiment (SPE-N) at the Nevada National Security Site (NNSS) near Las Vegas, Nevada is to improve upon and develop new physics based models for underground nuclear explosions using scaled, underground chemical explosions as proxies. Infrasound has been used for many years to study explosive sources both above and below ground. For most of these studies the explosions ... |
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| Computational Research for Engineering and Science Ground Vehicle (CRES-GV) |
29 Aug 2012 |
17 pages |
| Authors:
Robert Smith; Dam Ledzoprel; ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
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| PhysicsFun4K24 |
31 Jul 2012 |
26 pages |
| Authors:
Lewis L Hart; ADAPTIVE METHODS CENTREVILLE VA
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| The PhysicsFun4k24, or simply PhysicsFun, project has defined the following objectives: 1) Formulate a gaming environment for learning a basic set of physics principles where students are fully immersed in lessons, enabled to discovery principles and allowed to identify limits and extension of principles through experimentation; 2) Create a prototype of that environment for students to experientially explore and understand a basic set of physics principles, where students interact with ... |
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| Development of RF Sensor Based on Two-cell SQUID |
Jul 2012 |
21 pages |
| Authors:
Alexey Ustinov; Fengbin Song; Ming He; KARLSRUHE INST OF TECHNOLOGY (GERMANY)
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| The RF directional sensor based on phase-sensitive detection using two sorts of Josephson parametric amplifiers has been analyzed and investigated experimentally. To construct the Josephson parametric amplifier, we use a SQUID (either single-cell SQUID or two-cell SQUID) embedded in a superconducting coplanar waveguide. We operated the circuit at a frequency of several GHz and measured the amplitude response of the SQUID-based Josephson parametric amplifier. Nonlinearity and flux tunability in the ... |
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| Alternate Reality Teaching: OurSpace |
08 Jun 2012 |
29 pages |
| Authors:
Amy Kruse; Michael Becker; Michael Richard; INTIFIC INC HAMPTON VA
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| Phase 1 Final Report for Alternate Reality Teaching: OurSpace in support of DARPA-BAA-12-38 ENGAGE. The purpose of this document is to present the results of the PHASE 1 Program. Computer games offer the ability to attract and hold children's attention for extended periods of time, often exceeding that of the classroom environment. OurSpace offers an innovative game tailored to pique the interest of first grade students in Science concepts. The ... |
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| Quantum Electronic Solids |
07 Mar 2012 |
29 pages |
| Authors:
Harold Weinstock; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
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| Atomic and Molecular Physics Program |
07 Mar 2012 |
40 pages |
| Authors:
Tatjana Curcic; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
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| Physics and Electronics |
05 Mar 2012 |
8 pages |
| Authors:
Patrick Carrick; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
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| Experiments on Transition Physics in Hypersonic Boundary Layers: Validation Data for Modeling and Computations |
26 Jan 2012 |
14 pages |
| Authors:
William S Saric; TEXAS A AND M UNIV COLLEGE STATION
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| The Mach 6 Quiet Tunnel (M6QT), the hypersonic low-disturbance facility formerly at NASA Langley, has been permanently installed as part of the Texas A&M National Aerothermochemistry Laboratory (TAMU-NAL) in College Station, Texas. The tunnel now operates interchangeably with the Adaptively Controlled Expansion Mach 5-8 tunnel (ACE) in a blowdown configuration with a maximum runtime of approximately 50 seconds. An initial series of tests to determine the quiet-flow capabilities of the ... |
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| Conceptual and Laboratory Exercise to Apply Newton's Second Law to a System of Many Forces |
Jan 2012 |
15 pages |
| Authors:
Carl E Mungan; NAVAL ACADEMY ANNAPOLIS MD DEPT OF PHYSICS
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| A pair of objects on an inclined plane are connected together by a string. The upper object is then connected to a fixed post via a spring. The situation is first analysed as a classroom exercise in using free-body diagrams to solve Newton's second law for a system of objects upon which many different kinds of force are acting (string tension, spring force, gravity, normal force and friction). Next, the ... |
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| Cylindrical Vector Beams for Rapid Polarization-Dependent Measurements in Atomic Systems |
05 Dec 2011 |
9 pages |
| Authors:
F K Fatemi; NAVAL RESEARCH LAB WASHINGTON DC OPTICAL SCIENCES DIV
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| We demonstrate the use of cylindrical vector beams - beams with spatially varying polarization - for detecting and preparing the spin of a warm rubidium vapor in a spatially dependent manner. We show that a modified probe vector beam can serve as an atomic spin analyzer for an optically pumped medium, which spatially modulates absorption of the beam. We also demonstrate space-variant atomic spin by optical pumping with the vector ... |
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| Basic Detonation Physics Algorithms |
Dec 2011 |
102 pages |
| Authors:
Douglas V Nance; AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE
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| This report presents the theory behind a series of detonation physics algorithms used to simulate the detonation of a condensed explosive. The numerical scheme implemented in this case is the Roe flux difference splitting scheme due to Glaister. This report contains a detailed discussion of the mathematical derivation along with a printing of the source code. We also include a discussion of methods for implementing Lagrangian tracking algorithms for solid ... |
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| Verification and Validation of the Coastal Modeling System. Report 2: CMS-Wave |
Dec 2011 |
112 pages |
| Authors:
Lihwa Lin; Zeki Demirbilek; Rob Thomas; III Rosati James; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
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| There are four reports documenting the Verification and Validation (V&V) of the Coastal Modeling System (CMS): an executive summary, waves, circulation, and sediment transport/morphodynamics, respectively. This is the second technical report (Report 2) that describes the wave modeling component of the V&V study. The goal of the report was to critically assess both general and special predictive skills of CMS-Wave, a spectral wave model in the CMS developed to address ... |
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| The Community-based Whole Magnetosphere Model |
15 Nov 2011 |
26 pages |
| Authors:
Aaron J Ridley; MICHIGAN UNIV ANN ARBOR
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| The main goals of the Community-based Whole Magnetosphere Model (CWMM) project were to: 1. Add more models to the Space Weather Modeling Framework (SWMF), including a plasmasphere model, a polar wind model, a radiation belt model, and a new ring current model. 2. Improve the physics within the existing models and improve the physics in the coupling between the different models. 3. Quantify the improvements within the CWMM as the ... |
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| Coaxial Jets Subjected to External Acoustics |
20 Oct 2011 |
28 pages |
| Authors:
Ivett Leyva; Sophonias Teshome; Juan Rodriguez; Jeff Graham; Doug Talley; Ann Karagozian; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
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| Modern rockets operate at supercritical pressures with respect to propellants. There is a need to understand mixing and combustion beyond liquid and gas states. Shear coaxial injectors are a common choice for cryogenic liquid rocket engines. Interactions of transverse acoustics with an injector's own modes and mixing need to be understood in terms of combustion instability. There is a need to understand the differences in response to pressure and velocity ... |
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| Analysis and Simulation of Far-Field Seismic Data from the Source Physics Experiment Explosions |
Sep 2011 |
12 pages |
| Authors:
Robert J Mellors; Arthur J Rodgers; Phillip E Harben; William R Walter; Sean Ford; Jeffery L Wagoner; N A Petersson; Bjorn A Sjogreen; Teresa F Hauk; Stan D Ruppert; LAWRENCE LIVERMORE NATIONAL LAB CA
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| The Source Physics Experiment (SPE-N) at the Nevada National Security Site (NNSS) is planned as a series of chemical explosions under a variety of emplacement conditions. The SPE-N goal is to improve our physical understanding and ability to model how explosion generate seismic waves, particularly S-waves. The first SPE-N explosion (SPE1) occurred in May 2011 and consisted of a 220 lb (100 kg) chemical explosion at a depth of 180 ... |
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| ONR Graduate Traineeship Award Update |
Sep 2011 |
7 pages |
| Authors:
Stephanie Fried; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB
|
| LONG-TERM GOALS: This project s goal is to explore ways of using ambient noise in the ocean to extract the physical characteristics of the ocean environment. In addition, this research is the the PI s Ph.D. research, leading to her completed Ph.D. this term. OBJECTIVES: Noise correlation processing extracts coherent signals from seemingly random noise data. Although this technique has been successfully used in processing ocean ambient noise data it ... |
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| A Computational Examination of Detonation Physics and Blast Chemistry |
Aug 2011 |
|
| Authors:
Christopher C Buchanan; AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE
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| This report makes preliminary steps in considering the detonation process for condensed explosives and the chemistry in the field of detonation products as linked physical entities. The desired end state of this research is improved control over explosive energy release. The report begins with a review of detonation physics with attendant algorithms for predicting detonation pressures. The second part of the report includes calculations of turbulent blast chemistry based upon ... |
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| Broadband Epsilon-Near-Zero (ENZ) and Mu-Near-Zero (MNZ) Active Metamaterial |
Aug 2011 |
121 pages |
| Authors:
Silvio Hraba; Igor Krois; Ivan Bonic; Aleksandar Kiricenko; Eduardo U Munoz; ZAGREB UNIV (CROATIA) FACULTY OF ELECTRICAL ENGINEERING AND COMPUTING
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| This study reports 12-month research effort undertaken to understand, and eventually overcome, one of the most serious drawbacks of all passive metamaterials: the inherent narrowband operation. We found that this narrowband operation is limited by basic physics (by the energy-dispersion constraints) and not by imperfections of available technology. However, we also found possible to go around this drawback by the incorporation of active non-Foster elements in the metamaterial structure. It ... |
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| A Computational Examination of Detonation Physics and Blast Chemistry |
Aug 2011 |
27 pages |
| Authors:
Christopher C Buchanan; AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE
|
| This report makes preliminary steps in considering the detonation process for condensed explosives and the chemistry in the field of detonation products as linked physical entities. The desired end state of this research is improved control over explosive energy release. The report begins with a review of detonation physics with attendant algorithms for predicting detonation pressures. The second part of the report includes calculations of turbulent blast chemistry based upon ... |
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| Graphical User Interface for Flow Noise Modeling, Analysis, and Array Design |
25 Jul 2011 |
41 pages |
| Authors:
Alia W Foley; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
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| A system is provided that employs a programmable computer on which a graphical user interface provides parametric design and analysis of pressure sensor arrays used in aero- or hydroacoustic investigations. Use of the system allows for scientific and parametric investigations of turbulent boundary layer physics, as well as iterative array design optimization. Additionally, the system including the graphical user interface facilitates comparison of the results of current models for wall ... |
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| Rolling the Black Pearl Over: Analyzing the Physics of a Movie Clip |
May 2011 |
7 pages |
| Authors:
Carl E Mungan; John D Emery; NAVAL ACADEMY ANNAPOLIS MD
|
| In the third movie ( At World's End ) in the Pirates of the Caribbean series, Jack Sparrow and his crew need to roll their ship (the Black Pearl) over in order to bring it back to the living world during a green flash at sunset. They do so by running back and forth from one side railing to the other on the top deck. In addition, Captain Barbossa orders ... |
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| Electrostatic Repulsion of Charged Pith Balls Hanging from Strings |
Jan 2011 |
7 pages |
| Authors:
Carl E Mungan; NAVAL ACADEMY ANNAPOLIS MD DEPT OF PHYSICS
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| Two positively charged pith balls hang from a nail at the end of equal-length strings in Earth's surface gravitational field. The problem consists in finding each of the hanging angles when the balls do not necessarily have the samemass or charge. The solution is an excellent exercise in developing two skills: wisely choosing the coordinate axes in a free-body diagram, and correctly interpreting the roots and limits of a numerical ... |
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| Nesting a Nonhydrostatic Model in a Hydrostatic Model: The Boundary Interface |
Jan 2011 |
11 pages |
| Authors:
P C Gallacher; D A Hebert; M R Schaferkotter; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEAN SCIENCES BRANCH
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| A method is developed for adjusting the values of the prognostic variables near the interface between a nonhydrostatic, high resolution model embedded in a hydrostatic, coarser resolution model. It incorporates a method of conditioning the outer domain lateral boundary values to enforce conservation of volume when the variables are interpolated onto the inner domain grid. This is accomplished by adjusting the baroclinic normal velocities at the open boundaries after interpolation. ... |
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| Educating Future Leaders about Space at West Point |
Jan 2011 |
5 pages |
| Authors:
Diana Loucks; Ken Chadwick; Jessica Mikhaylov; Andrew Pfluger; Thomas Pugsley; William Wright; MILITARY ACADEMY WEST POINT NY
|
| The United States Military Academy, commonly known as West Point, has produced junior Army leaders since its inception in the early 1800s. While the purpose of West Point has evolved over the last two centuries, its fundamental mission has remained relatively stable: To educate, train, and inspire the Corps of Cadets so that each graduate is a commissioned leader of character committed to the values of Duty, Honor, Country; and ... |
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| Effect of Defect-Rich Epitaxy on Crystalline Silicon / Amorphous Silicon Heterojunction Solar Cells and the Use of Low-Mobility Layers to Improve Performance |
Jan 2011 |
5 pages |
| Authors:
Michael G Deceglie; Harry A Atwater; CALIFORNIA INST OF TECH PASADENA T J WATSON LABS OF APPLIED PHYSICS
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| We present two-dimensional device physics simulations of amorphous silicon / crystalline silicon heterojunction solar cells to explain the effects of full and localized epitaxial layers, sometimes observed in the early stages of amorphous Si deposition, on cell performance. Minimizing the defect density, thickness, and wafer area fraction covered by the epitaxial region are shown to be important factors for maximizing cell open circuit voltage. We find that localized defect-rich epitaxial ... |
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| Edgewood Chemical Biological Center In-House Laboratory Independent Research Program Annual Report FY11 |
Jan 2011 |
134 pages |
| Authors:
ARMY EDGEWOOD CHEMICAL BIOLOGICAL CENTER APG MD
|
| The In-House Laboratory Independent Research (ILIR) program is specifically designed to foster increased innovation within the ECBC Basic Research portfolio. The purpose of the ILIR program is to fund innovative basic research projects that are high risk and have high potential payoff for fulfilling Army needs. The Department of Defense (DoD) defines basic research as the systematic study directed toward greater knowledge or understanding of the fundamental aspects of phenomena ... |
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| A Radiative Transfer Model for Acoustic Propagation in Ocean Sediment Layers |
30 SEP 2010 |
11 pages |
| Authors:
Lisa M. Zurk; PORTLAND STATE UNIV OR
|
| The propagation of mid-frequency (1-10 kHz) acoustic waves in shallow water regions (depths of 100- 200 m) is strongly influenced by the characteristics of the ocean bottom. While there has been much progress in developing and validating bottom scattering models, much of the focus has been in the high frequency regime with comparatively less focus in the mid-frequency. This is an important topic, since in the mid-frequency regime the acoustic ... |
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| Parametric Phase-Sensitive Detector Using Two-cell SQUID |
AUG 2010 |
18 pages |
| Authors:
Alexey Ustinov; KARLSRUHE INST OF TECHNOLOGY (GERMANY)
|
| During this first reporting period evaluated the performance of two different microwave directional sensors based on two-cell SQUIDs. Two SQUID circuits with different values of McCumber parameter Beta c have been tested. Observed that best results can be obtained when the McCumber parameter Beta c aprox. to 1. Found that the dc voltage of the proposed two-cell SQUID circuit can vary by 1.4 microV when the incoming angle theta varies ... |
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| Fundamental Physics and Practical Applications of Electromagnetic Flow Control in High Speed Flows |
05 APR 2010 |
17 pages |
| Authors:
Graham V. Candler; MINNESOTA UNIV MINNEAPOLIS
|
| There are two overall objectives of the proposed research program. The first objective is to perform fundamental studies of microwave and combined microwave/laser energy deposition. The studies include characterization of the new microwave coaxial resonator at the University of Illinois, and development of kinetic-gasdynamic models for microwave and combined microwave/laser energy deposition in air. The second objective is to investigate practical applications of microwave and combined microwave/laser energy deposition for ... |
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| Acoustic Propagation in Continental Shelf Break and Slope Environments |
2010 |
8 pages |
| Authors:
David P. Knobles; TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS
|
| The long-term goal of the research is to increase the physical understanding of acoustic propagation in continental shelf and slope environments in the 25-5000 Hz band. This includes both the physics of the seabed and the coupling to physical mechanisms in the water column in complex range- and azimuth-dependent littoral waveguides. There were two main objectives of the current research. The first objective was to complete a final numerical implementation ... |
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| High-Velocity Impact of Low-Density Projectiles on Structural Aluminum Armor |
Sep-2009 |
14 pages |
| Authors:
B R Sorensen; K D Kimsey; B M Love; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| The US Army Research Laboratory has been studying the impact physics of low-density projectiles on urban and light-armor structures for use in electro-magnetic cannons. In this report, results of low-aspect ratio projectiles of nylon, aluminum and steel impacting aluminum armor at velocities above 2000 m/s will be presented. Both computational solid mechanics and analytic modeling techniques were used to supplement experiments to derive a toolkit for assessing target response and ... |
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| Three Important Taylor Series for Introductory Physics |
SEP 2009 |
5 pages |
| Authors:
Carl E. Mungan; NAVAL ACADEMY ANNAPOLIS MD DEPT OF PHYSICS
|
| Taylor expansions of the exponential exp(x), natural logarithm ln(1+x), and binomial series (1+x)n are derived to low order without using calculus. It is particularly simple to develop and graph the expansions to linear power in x. An example is presented of the application of the first-order binomial expansion to finding the electrostatic potential at large distances from an electric dipole. With a little extra work, the second-order expansions can be ... |
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| Non-Equilibrium Gas Dynamics - From Physical Models to Hypersonic Flights (Dynamique des gaz non- equilibres - Des modeles physiques jusqu'au vol hypersonique) |
Sep 2009 |
|
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
|
 | In-depth knowledge of gas dynamics at hypersonic speeds is required to define the environment and requirements for the design and safe operation of space vehicles, planetary probes, and rockets. Development of physical models and numerical methods has enabled major advancements in our approach to the design of vehicles, and has minimized the needs for extensive flight tests. However, there remain many challenges in our ability to model the hypersonic regime. ... |
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| Multiscale Computations of Microcracking Solids |
08-Jul-2009 |
9 pages |
| Authors:
Ted Belytschko; NORTHWESTERN UNIV EVANSTON IL
|
| New multiscale methods have been developed for the study of microcracking and dislocations. The multiscale method for microcracking aggregates the effect of an arbitrary number of cracks at the micro level into a single equivalent crack at the macrolevel. The methodology is based on the concept of a perforated unit cell, which excludes all subdomains of the unit cell where the material loses stability in the averaging operations. We have ... |
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| Approximation for the Rayleigh Resolution of a Circular Aperture |
MAY 2009 |
3 pages |
| Authors:
Carl E. Mungan; NAVAL ACADEMY ANNAPOLIS MD DEPT OF PHYSICS
|
| Rayleigh's criterion states that a pair of point sources are barely resolved by an optical instrument when the central maximum of the diffraction pattern due to one source coincides with the first minimum of the pattern of the other source. As derived in standard introductory physics textbooks,1 the first minimum for a rectangular slit of width a is located at angular position theta = sin(inverse) (lambda /a) for light of ... |
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| Crystallization Augmentation of Engineering Thermoplastics through Dispersion of Silicon-Containing Nanoparticles |
26-Apr-2009 |
3 pages |
| Authors:
Joseph M Mabry; Gregory R Yandek; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
|
| The mechanical properties and environmental durability of engineering thermoplastics are generally dependent on their degree of molecular ordering. Processing conditions affect observed microstructures in this class of materials and costly annealing procedures can be required to generate adequate levels of crystallinity. It is therefore beneficial to not only develop an understanding of the fundamental physics governing ordering transitions, but to be able to use such knowledge to assert control over ... |
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| An Investigation of Shock Wave Physics via Hybrid CFD-BGK Solution Methods for Nonequilibrium Flows |
Mar-2009 |
92 pages |
| Authors:
Brook I Bentley; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The Unified Flow Solver, a hybrid continuum-rarefied code, is used to investigate the internal structure of a normal shock wave for a Mach range of 1.55 to 9.0 for Argon, and 1.53 to 3.8 for diatomic Nitrogen. Reciprocal shock thickness, density, temperature, heat flux, and the velocity distribution function are calculated for a one-dimensional shock wave and compared with experimental data from Alsmeyer and DSMC results from Bird. Using the ... |
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| Chemistry and Physics of Analyte Identification in Integrated Nanosensors |
05-Feb-2009 |
21 pages |
| Authors:
Ivan K Schuller; William Trogler; CALIFORNIA UNIV SAN DIEGO LA JOLLA OFFICE OF CONTRACT AND GRANT ADMINISTRATION
|
| This supplement was dedicated to the development and modeling of phthalocyanine based chemical sensors. We used Organic Molecular Beam Epitaxy (OMBE) to prepare phthalocyanine based sensors. We lithographically patterned special electrode configurations and mounted them on a universal commercial carrier chip thus facilitating manufacturability in actual field testable devices closer to reality. Two types of metallo-phthalocyanine (M-Pc) based sensors were prepared; Co-MPc films 12 monolayer thick and 3 different kinds ... |
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| Propulsion and Power Rapid Response Research and Development Support: Fundamental Science Investigations for Propulsion and Power Systems |
Jan-2009 |
236 pages |
| Authors:
Donald B Hanson; UNIVERSAL TECHNOLOGY CORP DAYTON OH
|
| Research was conducted for the Propulsion Directorate's research and development efforts in core technology areas for turbine engines, hypersonics, and aerospace power. Experimental and theoretical research was conducted in the technical disciplines of fuels and combustion; mechanical subsystems and life management; aerodynamics; aerospace power systems including applied and high temperature superconductivity, physics of electrical discharges, applied atomic and molecular spectroscopy, thermophysics and high temperature dielectric materials, thermal nanofluids for heat ... |
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| Physics Based Modeling of Helicopter Brownout for Piloted Simulation Applications |
Dec-2008 |
11 pages |
| Authors:
Daniel A Wachspress; Glen R Whitehouse; Jeffrey D Keller; Kevin McClure; Phillip Gilmore; Michael Dorsett; CONTINUUM DYNAMICS INC EWING NJ
|
| The entrainment and circulation of ground dust and debris during rotorcraft take-off and landing over unprepared fields, often referred to as brownout, represents a serious operational problem for rotorcraft aviation. Recent experience in Afghanistan and Iraq has heightened the awareness of the impact of reduced visibility on safe rotorcraft operations in brownout conditions. Brownout related accidents have led to the loss of more than 20 helicopters and 50 lives since ... |
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| QCCM Center for Quantum Algorithms |
17-Oct-2008 |
18 pages |
| Authors:
Richard Cleve; SIMON FRASER UNIV BURNABY (BRITISH COLUMBIA)
|
| The goals of this project are as follows: discover new quantum algorithms, develop novel paradigms for constructing quantum algorithms, develop complexity-theoretic results that relate to quantum algorithms, and develop theoretical approaches for the implementation of quantum algorithms. Building on the pioneering work of Shor and Grover, the field of quantum algorithms has developed substantially, providing numerous insights about the mechanisms underlying quantum algorithms, as well as the limitations of these ... |
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| Foundations of Isomer Physics for Energy Applications |
16-Oct-2008 |
102 pages |
| Authors:
James J Carroll; YOUNGSTOWN STATE UNIV OH
|
| Metastable excited nuclear states, isomers, have been of strong interest for decades, with studies motivated by their physical properties and the promise of high-energy-density applications. Much research has concentrated on induced depletion processes as a potential means of controlling the release of energy stored in these isomers. This research comprises a very specialized sub-field of nuclear physics and, as such, has often suffered from a lack of connection with the ... |
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| Measurements of Two-Cell Flux Qubits at Millikelvin Temperatures |
SEP 2008 |
25 pages |
| Authors:
A. K. Feofanov; J. Lisenfeld; A. V. Ustinov; ERLANGEN-NUERNBERG UNIV (GERMANY) PHYSIKALISCHES INSTITUT III
|
| We report on the study of Josephson junction two-cell flux qubits and phase qubits. We have made progress with fabrication of two-cell flux qubits based on small Al-AlOx-Al Josephson tunnel junctions. We succeeded in preparing junctions as small as 0.09 x 0.24 sq micrometres. We describe newly developed sample design which implements a "silent" two-cell qubit containing a fluxon trapping loop as a phase shifter. This design was submitted for ... |
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| Real-Time Terahertz Imaging Using a Quantum Cascade Laser and Uncooled Microbolometer Focal Plane Array |
01-Jun-2008 |
101 pages |
| Authors:
Barry N Behnken; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Real-time imaging in the terahertz (THz) spectral range was achieved using an uncooled, 160 120 pixel infrared microbolometer camera and a milliwatt-scale quantum cascade laser (QCL). By replacing the camera's original focusing optics with a Tsurupica-based lens and minimizing diffraction effects incurred by the QCL output beam, an imaging scheme was developed in which the camera's focal plane array successfully detected wavelengths that are more than an order of magnitude ... |
|
| Intelligent Information Systems Institute |
01-Jun-2008 |
20 pages |
| Authors:
Carla P Gomes; CORNELL UNIV ITHACA NY
|
| The Intelligent Information Systems Institute began operation in December of 2000. Its mandate is threefold: To perform and stimulate research in computer and data-intensive methods for intelligent decision making systems; to foster collaborations between Cornell researchers, AFRL, in particular IF, and the scientific community; and to play a leadership role in the research and dissemination of the core areas of the institute. IISI supports basic research within the Faculty of ... |
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| Multidisciplinary University Research Initiative on Ultracold Atom Optics |
09-Apr-2008 |
12 pages |
| Authors:
Dana Z Anderson; COLORADO UNIV AT BOULDER
|
| Work under the MURI in Ultracold Atom Optics Science and Technology has contributed substantially to the development of new technology and knowledge toward practical implementations of both ultracold matter and slow light systems. Work on cold matter focused on simplifying systems for producing Bose-Einstein condensation (BEC) and studied both optical and atom chip based approaches. The chip-based approaches in particular have proved to enable substantial reduction in the size, weight ... |
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Reports by Keyword(s)
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