| HQ Air National Guard Bureau Request for Hazardous Materials Waiver per AFMAN 24-204 for the MODS-75 |
28 Nov 2012 |
7 pages |
| Authors:
Peter Lurker; SCHOOL OF AEROSPACE MEDICINE WRIGHT PATTERSON AFB OH OCCUPATIONAL AND ENVIRONMENTAL HEALTH DEPT
|
 | Headquarters Air National Guard Bureau Command requested the U.S. Air Force School of Aerospace Medicine provide modeling data of the maximum oxygen concentration aboard mobility aircraft used by the Air National Guard (C-130, C-5, C-17, KC-10, and KC-135) when transporting a liquid oxygen unit, the Mass Oxygen Distribution System (MODS-75). The AIHA Press mathematical model for estimating occupational exposure to chemicals was used to estimate the maximum oxygen level in ... |
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| American Recovery and Reinvestment Act-Implementation of the Advanced Metering Infrastructure Requirements for Planning, Contractor's Performance, and 'Reporting Was Ineffective |
10 Sep 2012 |
59 pages |
| Authors:
DEPARTMENT OF DEFENSE ALEXANDRIA VA OFFICE OF THE INSPECTOR GENERAL
|
| We are providing this report for review and comment. Naval Facilities Engineering Command Southwest officials did not have effective controls over the planning, contractor's performance, and reporting of the Advanced Metering Infrastructure project, vallied at $24.8 million. As a result, Navy lacks reasonable assurance that $24.8 million of Recovery Act funds were appropriately justified and the installation of the meters was properly planned. We considered management comments on a draft ... |
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| Detection of Subpixel Submerged Mine-Like Targets in WorldView-2 Multispectral Imagery |
Sep 2012 |
111 pages |
| Authors:
Michelle R Sandersfeld; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The utility of satellite spectral imagery is analyzed for the detection of submerged mine like objects. The targets that were utilized were sub-meter in size and emplaced in the water off the coast of La Jolla, California for a barnacle study. There were three surface targets and three submerged targets that did not exceed three meters in depth. Two meter multispectral and half meter panchromatic WorldView-2 data were used for ... |
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| Analysis of the Computer, Meteorological Data - Profiler's (CMD-P) Capability to Assimilate Regional Radiosonde Data |
Sep 2012 |
33 pages |
| Authors:
P Haines; J Cogan; T Jameson; J Swanson; ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM
|
| The Product Manager (PM) for Meteorological and Target Identification Capabilities (MaTIC) developed a laptop-based version of the Meteorological Measuring Set-Profiler (MMS-P) that should replicate the capabilities of the latest currently fielded version, the MMS-P Block I ? Version 2 (B1v2). The laptop is a standard dual-processor VT Miltope CHS laptop. The B1v2 can generate all types of artillery meteorological (MET) messages. The PM funded the U.S. Army Research Laboratory (ARL) ... |
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| Tracking Subpixel Targets with Critically Sampled Optical Sensors |
Sep 2012 |
93 pages |
| Authors:
James T Lotspeich; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In many remote sensing applications, the area of a scene sensed by a single pixel can often be measured in square meters. This means that many objects of interest in a scene are smaller than a single pixel in the resulting image. Current tracking methods rely on robust object detection using multi-pixel features. A subpixel object does not provide enough information for these methods to work. This dissertation presents a ... |
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| Skill Tests of Three-Dimensional Tidal Currents in a Global Ocean Model: A Look at the North Atlantic |
09 Aug 2012 |
23 pages |
| Authors:
Patrick G Timko; Brian K Arbic; James G Richman; Robert B Scott; E J Metzger; Alan J Wallcraft; NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| We present and apply several skill tests to assess tidal currents generated within a global ocean model compared to an archive of current meter records spanning 40 years. Within the North Atlantic we have identified over 1800 velocity records available for comparison to model output. The skill tests identify those regions where tidal ellipse parameters (semi-major/minor axis, inclination and Greenwich phase) fall within 95% confidence intervals derived from observations. Additional ... |
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| Hypersonic Transition Experiments in 3D Cone Flow with New Measurement Techniques |
Aug 2012 |
40 pages |
| Authors:
Dirk Heitmann; Rolf E Radespiel; TECHNICAL UNIV BRAUNSCHWEIG (GERMANY) INST OF FLUID MECHANICS
|
| This is the final report deals with laminar-turbulent transition measurements on an inclined cone at hypersonic Mach number. Within the flow field of an inclined cone three different boundary layer instabilities appear: first and second mode instability waves and crossflow vortices. Two different measurement techniques were applied: (i) IR-thermography was used for measuring stationary crossflow vortices. This instability was quantitatively measured. The position where these vortices evolve, their amplification and ... |
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| Fine Scale Spatiotemporal Clustering of Dengue Virus Transmission in Children and Aedes aegypti in Rural Thai Villages |
Jul 2012 |
11 pages |
| Authors:
In-Kyu Yoon; Arthur Getis; Jared Aldstadt; Alan L Rothman; Darunee Tannitisupawong; Constantianus J Koenraadt; Thanyalak Fansiri; James W Jones; Amy C Morrison; Richard G Jarman; ARMED FORCES RESEARCH INST OF MEDICAL SCIENCES BANGKOK (THAILAND)
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| Based on spatiotemporal clustering of human dengue virus (DENV) infections, transmission is thought to occur at fine spatiotemporal scales by horizontal transfer of virus between humans and mosquito vectors. To define the dimensions of local transmission and quantify the factors that support it, we examined relationships between infected humans and Aedes aegypti in Thai villages. Methodology/Principal Findings: Geographic cluster investigations of 100-meter radius were conducted around DENVpositive and DENV-negative febrile ... |
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| Turbine Aerothermal Research |
May 2012 |
19 pages |
| Authors:
Rolf Sondergaard; Shichuan Ou; Richard Rivir; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIR/TURBINE ENGINE DIV/TURBINE BRANCH
|
| This in-house task was funded under AFOSR ILIR grants 92PR07COR and 02PR02COR. This task and its predecessors have been in continual operation since 1985 and have covered a broad range of topics relating to the aerodynamics and thermodynamics of the turbine module of gas turbine engines. The work initially focused on the effects of very high turbulence freestream flows on the development of the boundary layers of the turbine component, ... |
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| Position Estimation for Projectiles Using Low-cost Sensors and Flight Dynamics |
Apr 2012 |
38 pages |
| Authors:
Luisa D Fairfax; Frank E Fresconi; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Navigation of gun-launched precision munitions using affordable technologies is investigated. Estimation algorithms were developed to blend flight dynamic models with measurements from inertial sensors and, if available, global positioning system (GPS). The launch and flight characteristics of the unique, gun-launched environment were exploited both in the state estimator and for novel heuristic parameter identification. The algorithm included using low-cost inertial sensor arrays and general GPS availability. Experimental results from guided ... |
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| Development of a Radar-Frequency Metamaterial Measurement and Characterization Apparatus |
Mar 2012 |
215 pages |
| Authors:
Stephen I Faris; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The overall purpose of this research was to design, build, and test an apparatus for the measurement and characterization of radar-frequency metamaterial performance in the S-band through Ku-band (2-18 GHz). Measurement and characterization is vital to metamaterial taxonomy and ultimately vital to metamaterial definitions. Thus, the current lack of clarity in metamaterial definitions has served as the primary motivation for pursuing a method for taxonomy and thus, this apparatus. The ... |
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| THz Detection Of Small Molecule Vapors In The Atmospheric Transmission Windows |
Mar 2012 |
21 pages |
| Authors:
Joseph S Melinger; Yihong Yang; Mahboubeh Mandehgar; D Grischkowsky; NAVAL RESEARCH LAB WASHINGTON DC
|
| Using a low power beam of ultrashort THz pulses that propagate in the ambient laboratory environment we have measured the rotational signatures of small molecule vapors at frequencies within the atmospheric transmission windows. We investigate two types of apparatus. In the first type the THz beam propagates along a 6.7 meter round trip path that is external to the spectrometer, and which contains a long sample tube (5.4 meter round ... |
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| Automating Nearshore Bathymetry Extraction from Wave Motion in Satellite Optical Imagery |
Mar 2012 |
117 pages |
| Authors:
Steven Mancini; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Nearshore depths for Waimanalo Beach, HI, are extracted from optical imagery, taken by the WorldView-2 satellite on 31 March 2011, by means of automated wave kinematics bathymetry (WKB). Two sets of three sequential images taken at intervals of about 10 seconds are used for the analyses herein. Water depths are calculated using a computer program that registers the images, estimates the currents, and then uses the linear dispersion relationship for ... |
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| Single-cycle Optical Pulses and Isolated Attosecond Pulse Generation |
29 Feb 2012 |
41 pages |
| Authors:
Franz X Kaertner; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
| The MIT Single-Cycle Pulse and Isolated Attosecond Pulse Generation Program enabled to demonstrate, for the first time, a novel pulse synthesis technology based on ultrabroadband multi-color OPCPAs and explore the generation and control of isolated attosecond XUV pulses using the synthesized pulses. We developed several relevant ultrafast laser technologies and attosecond measurement systems, such as picosecond cryo-cooled Yb:YAG pump laser amplifiers, 2D and 4DSI pulse characterization techniques, optical balanced cross-correlator, ... |
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| Experimentally-Based Ocean Acoustic Propagation and Coherence Studies |
Jan 2012 |
15 pages |
| Authors:
Timothy F Duda; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF APPLIED OCEAN PHYSICS AND ENGINEERING
|
| The long-term goal is to better understand fluctuating sound propagation in two distinct ocean acoustic regimes: Stratified shallow water, where sound is highly bottom interacting, and the temperate deep-ocean sound channel. Acoustic field fluctuations have time scales varying from less than a minute to hours, and horizontal spatial scales from tens of meters to kilometers, comparable to processing time scales and system spatial scales, and thus impact exploitation of underwater ... |
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| The Impact of Typhoons on the Ocean in the Pacific (ITOP) Field and Data Management Support |
16 Dec 2011 |
3 pages |
| Authors:
James Moore; UNIVERSITY CORP FOR ATMOSPHERIC RESEARCH BOULDER CO
|
| The ITOP (The Impact of Typhoons on the Ocean in the Pacific) Field Campaign in 2010 studied the interaction between typhoons and the underlying ocean with specific regard to the 4-dimensional response of the ocean underneath and behind the storm. This project involved instrumented aircraft and ships from the United States and Taiwan as well as ship-deployed instruments including floats, gliders, drifters, and moorings. The complexity of the observational campaign ... |
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| Studying the Origin of the Kuroshio with an Array of ADCP-CTD Moorings |
30 Sep 2011 |
4 pages |
| Authors:
Ren-Chieh Lien; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| Our long-term scientific goals are to understand the dynamics and identify the mechanisms of small-scale processes (i.e., internal tides, inertial waves, nonlinear internal waves (NLIWs), and turbulence mixing) in the ocean, and their interaction with mesoscale processes such as western boundary currents. We aim to develop improved parameterizations of mixing for ocean models. In this study, our focus is on the origin of the Kuroshio; the interaction among internal tides, ... |
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| Early Student Support for the Origins of the Kuroshio and Mindanao Current |
30 Sep 2011 |
5 pages |
| Authors:
Daniel L Rudnick; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA
|
| Autonomous underwater gliders are proving to be valuable tools for ocean sampling, and are being adopted remarkably rapidly by the oceanographic community. Oceanography has been primarily an observational science in the sense that almost every known phenomenon in the ocean was observed before it was predicted theoretically. The primary long-term goal of this project is to demonstrate the use of gliders to address basic scientific problems. Gliders are fulfilling the ... |
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| A Profiling Float System in the Origins of the Kuroshio and Mindanao Current |
30 Sep 2011 |
3 pages |
| Authors:
Daniel L Rudnick; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA
|
| The long-term goal of this work is to improve and validate techniques for observing energetic western boundary currents. In this DURIP, we plan to acquire a profiling float system consisting of 20 newly developed SOLO-II floats. The deployment of these floats in the Origins of the Kuroshio and Mindanao Current (OKMC) DRI is in service of this goal. The overarching objective of OKMC is to quantify the processes leading to ... |
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| Experimental Evaluation of the Atmospheric Energy Input to Sea Surface Waves |
30 Sep 2011 |
10 pages |
| Authors:
Tihomir Hristov; JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF MECHANICAL ENGINEERING
|
| Understanding the spatio-temporal structure and the dynamic influence of the surface waves signature in the wind is critical for the transition from the current empirical and phenomenological (dating back to Charnock (1956)), to a mechanistic description of air-sea interaction. Over the last decades, however, a number of observational studies attempting to detect statistical and dynamic manifestations of wave signature in the airflow have produced negative results. Weiler and Burling (1967) ... |
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| An Independent Check of the Performance of Two M2208 Fatigue Meters |
Sep 2011 |
39 pages |
| Authors:
Ian Powlesland; Quang Nguyen; Steve Galea; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
|
| Aircraft Structural Integrity section of Directorate General Technical Airworthiness (ASI-DGTA) has concerns about the current accuracy of the ageing M2208 electro-mechanical fatigue meters fitted to RAAF P-3C and C-130H aircraft. An examination of relevant documentation was undertaken and tests performed on two meters, one deemed unserviceable and the other fresh from an overhaul. The results of this investigation are presented and implications discussed. The variable frequency closed box style testing ... |
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| Experimentally-Based Ocean Acoustic Propagation and Coherence Studies |
Sep 2011 |
11 pages |
| Authors:
Timothy F Duda; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEEP SUBMERGENCE LAB
|
| LONG TERM GOALS: The long term goal is to better understand fluctuating sound propagation conditions in two distinct ocean acoustic environment types. The first type is stratified shallow water where sound is highly bottom interacting. The second type is the mostly non bottom-interacting temperate deep-ocean sound channel. Reliable predictions of temporal and spatial variability of received underwater sound can improve processing and handling of signals of interest, including remediation of ... |
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| Ecological DYnamics Simulation Model - Light (EDYS-L): User's Guide Version 4.6.4 |
Aug 2011 |
94 pages |
| Authors:
Cade L Coldren; Terry McLendon; W M Childress; David L Price; Mark R Graves; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
|
| THIS REPORT DESCRIBES THE ECOLOGICAL DYNAMICS SIMULATION MODEL LIGHT MODEL (EDYS-L) IN TERMS OF ITS FUNCTION AND HOW TO USE THE MODEL SOFTWARE. EDYS-L IS DESIGNED TO MECHANISTICALLY SIMULATE COMPLEX ECOLOGICAL DYNAMICS ACROSS SPATIAL SCALES RANGING FROM SQUARE METERS TO LANDSCAPE AND WATERSHED LEVELS. MODULES INCLUDE CLIMATIC SIMULATORS, HYDROLOGY, SOIL PROFILE, NUTRIENT AND CONTAMINANT CYCLES, PLANT COMMUNITY DYNAMICS, HERBIVORY, ANIMAL DYNAMICS, MANAGEMENT ACTIVITIES, AND NATURAL/ANTHROPOGENIC DISTURBANCES. DESIGNATION OF SCENARIOS AND ... |
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| Measurer's Handbook: US Army and Marine Corps Anthropometric Surveys, 2010-2011 |
Aug 2011 |
263 pages |
| Authors:
Jennifer Hotzman; Claire C Gordon; Bruce Bradtmiller; Brian D Corner; Michael Mucher; Shirley Kristensen; Steven Paquette; Cynthia L Blackwell; ARMY NATICK SOLDIER RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA
|
| The purpose of this manual is to describe and explain the tools and procedures required for the precise and accurate measurement of U.S. Army and U.S. Marine Corps men and women. The handbook was prepared by Natick Soldier Research, Development and Engineering Center, with funding from both the Army and the Marine Corps. It contains instructions for the measurement of 94 traditional measures of the body, and for obtaining three-dimensional ... |
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| Distributed Atmospheric Neutral Density Explorer (DANDE) |
31 Aug 2010 |
2 pages |
| Authors:
Henry J Pernicka; MISSOURI UNIV-ROLLA DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| The DANDE program has progressed from engineering and test units to near-flight and flight hardware. Significant testing has occurred within the last year including a mass properties test, RF testing, communication system end-to-end testing, mechanism thermal vacuum testing, software performance testing and science instrument tests. For the accelerometer instrument, signal and noise tests have occurred which have successfully demonstrated their filtering and amplification capabilities. The wind and temperature spectrometer has ... |
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| Plankton Dynamics and Mesoscale Turbulence |
29 Jun 2010 |
20 pages |
| Authors:
A Provenzale; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| In aquatic ecosystems, primary production (the transformation of inorganic materials and light into living matter by photosynthesis) is operated mainly by small, unicellular algae that float freely in the upper layers of oceans and lakes and are collectively called phytoplank-ton, see for an illustration the phytoplankters depicted in figure 1. Since phytoplankton need light, they are confined to the water layer where solar radiation can penetrate. This region is called ... |
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| The Army Metering Data Management System (MDMS): Using MDMS To Meet the Army's Energy Goals |
Jun 2010 |
22 pages |
| Authors:
John Blount; Curt Murdock; Stan Lee; ARMY ENGINEERING AND SUPPORT CENTER HUNTSVILLE AL
|
| Meeting Army Energy Goals: The metering data management system (MDMS) captures and reports enterprise data from advanced meters. MDMS will help the Army to comply with: Energy Policy Act of 2005 (EPAct 2005), Energy Independence and Security Act of 2007 (EISA 2007) and Executive Orders. What is MDMS? An enterprise system to track the Army s energy consumption worldwide. Track meter data from advanced utility meters in a central database ... |
|
| Smart Grid: How it Creates Disruptive Change |
Apr 2010 |
20 pages |
| Authors:
Russ Mattern; Paul Flanagan; INFORMATION RESOURCES MANAGEMENT COLL WASHINGTON DC
|
| Topics discussed: background--mega trends and issues, smart/intelligent grids--characteristics, advanced metering infrastructure (AMI), a look inside the power companies, why IT and OT need to merge, and implications for DoD. Advanced Metering Infrastructure (AMI) refers to systems that measure, collect and analyse energy usage, and interact with advanced devices such as electricity meters, gas meters, heat meters and water meters, through various communication media either on request (on demand) or on ... |
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| Ionospheric Monitoring and Specification Utilizing Data from the Defense Meteorological Satellite Program |
18 MAR 2010 |
12 pages |
| Authors:
W.R. Coley; R.A. Power; P.C. Anderson; M.D. Perdue; TEXAS UNIV AT DALLAS RICHARDSON
|
| Activities this year have been largely devoted to the adaptation of the ground software to accommodate the very low levels of solar activity, to continued examination of the robustness of the procedures to recover for single event upsets, and to the analysis and post-mortem associated with a malfunction of the ion drift meter on the F17 spacecraft. The low levels of solar activity have led to a significantly contracted ionosphere ... |
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| Quality of Ambulant Measures of Distance, Speed, Load and Energy Consumption During Military Operations |
Oct 2009 |
17 pages |
| Authors:
T Visser; Bertil J Veenstra; Jos Prinzen; Menno Zuidema; ROYAL NETHERLANDS ARMY UTRECHT
|
| During training and operations, soldiers are exposed to a number of factors that influence their physical and cognitive performance. These factors are induced by the environment (e.g. heat, altitude, dust, wind, rain), physical job requirements (e.g. carrying loads, walking, sleep deprivation) and mental stress (e.g. decision making, exams, combat stress). The majority of these factors have a negative impact on the operational readiness of soldiers. In 2008 a 4-year research ... |
|
| Anthropometric Survey (ANSUR) II Pilot Study: Methods and Summary Statistics |
Apr-2009 |
96 pages |
| Authors:
Steve Paquette; Claire Gordon; Bruce Bradtmiller; ANTHROTECH YELLOW SPRINGS OH
|
| Virtually every Army materiel system in use was designed and/or sized using a database of anthropometric information that is 20 years old. It was based on the Army Anthropometric Survey (ANSUR), which was conducted in 1988 on only Active Duty Soldiers. However, more than one-half of today's fighting forces are National Guard and Reserve component troops. A pilot study (ANSUR II) was recently undertaken to (1) assess anthropometric change since ... |
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| A High-Stability Capacitance Sensor System and its Evaluation |
APR 2009 |
5 pages |
| Authors:
Svetlana Avramov-Zamurovic; Rae D. Lee; NAVAL ACADEMY ANNAPOLIS MD
|
| A new capacitance sensor system was developed with a microcontroller, commercial humidity and temperature sensors capacitance-to-digital-converter and a custom-built capacitance sensor. The performance of the system was evaluated by simulation and by testing of the prototype. Impact of variations of ambient conditions on the system performance was analyzed and a model for correcting the humidity and temperature influence was developed. Based on experimental results obtained in noncontrolled environment using a ... |
|
| Stiffness-Based Assessment of Pavement Foundation Materials Using Portable Tools |
2009 |
11 pages |
| Authors:
Sarah R. Jersey; Lulu Edwards; ARMY CORPS OF ENGINEERS VICKSBURG MS ENGINEER RESEARCH AND DEVELOPMENT CENTER
|
| Traditional pavement quality assurance has focused on soil density and moisture content. Implementation of new mechanistic design methods calls for measuring the resilient modulus of constructed layers to determine whether it matches the modulus used during the pavement design process. Several tools have been marketed for this purpose in recent years. Eleven soil test beds were constructed at the U.S. Army Engineer Research and Development Center to evaluate three of ... |
|
| Two-Way Satellite Time and Frequency Transfer (TWSTFT) Calibration Constancy From Closure Sums |
Dec-2008 |
19 pages |
| Authors:
Demetrios Matsakis; Andreas Bauch; Lee Breakiron; Dirk Piester; Zhiheng Jiang; NAVAL OBSERVATORY WASHINGTON DC
|
| Two-way Satellite Time and Frequency Transfer (TWSTFT) is considered to be the most accurate means of long-distance time transfer, on the basis of its reported 1 ns repeat calibration consistency. This paper uses the closure sum technique to show that variations of the link-based component of the transfer data, in the absence of configuration changes, are largely subnanosecond in the European links. Two explanations for small, but non-zero, biases observed ... |
|
| Exploratory Experiments in the Tribological Behavior of Engineering Surfaces with Nano-Coating Using a Tribo-Rheometer |
30 MAY 2008 |
13 pages |
| Authors:
H. P. Kavehpour; CALIFORNIA UNIV REGENTS LOS ANGELES
|
| Funding was provided by the Air Force Office of Scientific Research in order to support exploratory experiments for probing the tribological behavior of nano-coatings on real surfaces. Recent experiments have shown desirable tribological properties for these materials. However, most of these experiments are performed on coated surfaces which are not used in the real life application. We explored the tribological properties of these solid-liquid-solid systems by the triborheometry fixture that ... |
|
| An Evaluation and Implementation Guide for Current Groundwater Mass Flux Measurement Practices |
01-Mar-2008 |
122 pages |
| Authors:
Wheeldon; Jack G III; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Contaminant mass flux is an important parameter needed for decision making at sites with contaminated groundwater. New and potentially better methods for measuring mass flux are emerging. This study looks at the conventional transect method (TM), and the newer passive flux meter (PFM), modified integral pump test (MIPT), and tandem circulating well (TCW) methods. In order to facilitate transfer and application of these innovative technologies, it is essential that potential ... |
|
| Experimental Study of the Mini-Helicon Thruster |
Feb-2008 |
81 pages |
| Authors:
Jean-Luc Cambier; Oleg Batishchev; MASSACHUSETTS INST OF TECH CAMBRIDGE SPACE PROPULSION LAB
|
| An experimental program to develop and test a mini-helicon thruster is described. The helicon discharge was designed and built in several different configurations using low- and high-current electromagnets. The program was designed to address several objectives: (i) to achieve a high coupling of RF-power to plasma and efficient acceleration to 20km/sec; (ii) to evaluate the scaling relations between power density, flow rates and B-field strength; (iii) to demonstrate operation with ... |
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| CLIVAR Mode Water Dynamics Experiment (CLIMODE), Fall 2006 R/V Oceanus Voyage 434, November 16, 2006-December 3, 2006 |
DEC 2007 |
|
| Authors:
Sebastien Bigorre; Robert Weller; Jeff Lord; John Lund; Jaime Palter; George Tupper; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
 | CLIMODE (CLIVAR Mode Water Dynamics Experiment) is a research program designed to understand and quantify the processes responsible for the formation and dissipation of North Atlantic subtropical mode water also called Eighteen Degree Water (EDW). Among these processes, the amount of buoyancy loss at the ocean-atmosphere interface is still uncertain and needs to be accurately quantified. In November 2006, cruise 434 onboard R/V Oceanus traveled in the region of the ... |
|
| An Investigation of the Role of Nutrient Gradients in the Episodic Formation, Maintenance and Decay of Thin Plankton Layers in Coastal Waters |
30 Sep 2007 |
9 pages |
| Authors:
Alfred K Hanson; SUBCHEM SYSTEMS INC JAMESTOWN RI
|
| Thin plankton layers are patches of phytoplankton and/or zooplankton that range in thickness from a few centimeters to a few meters yet can extend horizontally for kilometers and persist for days. Recent work has shown that thin layers can be sufficiently intense and persistent to affect the performance of current and planned Navy optical and acoustical sensors. In Hanson and Donaghay (1998) we showed how thin plankton layers are often ... |
|
| Thrust Stand Micro-Mass Balance Diagnostic Techniques for the Direct Measurement of Specific Impulse (Preprint) |
04 JUN 2007 |
19 pages |
| Authors:
Riki Lee; Brian D'Souza; Andrew Ketsdever; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF AEROSPACE AND MECHANICAL ENGINEERING
|
| A technique has been developed to directly measure the specific impulse from pulsed thruster systems. The technique is especially useful for propulsion devices that utilize solid propellants where a direct measurement of the propellant mass flow is extremely difficult. A torsion balance is used with a horizontal axis of rotation. A thruster is placed on the balance such that the impulse of the thruster firing and the change in mass ... |
|
| A Wafer-Bonded, Floating Element Shear-Stress Sensor Using a Geometric Moire Optical Transduction Technique |
2007 |
7 pages |
| Authors:
Stephen Horowitz; Tai-An Chen; Venkataraman Chandrasekaran; Ken Tedjojuwono; Louis Cattafesta; Toshikazu Nishida; Mark Sheplak; FLORIDA UNIV GAINESVILLE MECHANICAL AND AEROSPACE ENGINEERING
|
| This paper presents a geometric Moire optical-based floating-element shear stress sensor for wind tunnel turbulence measurements. The sensor was fabricated using an aligned waferbond/thin-back process producing optical gratings on the backside of a floating element and on the top surface of the support wafer. Measured results indicate a static sensitivity of 0.26 microns/Pa, a resonant frequency of 1.7 kHz, and a noise floor of 6.2/square root Hz. |
|
| Field Demonstration and Validation of a New Device for Measuring Water and Solute Fluxes at CFB Borden |
NOV 2006 |
153 pages |
| Authors:
Kirk Hatfield; Michael D. Annable; P. S. Rao; FLORIDA UNIV GAINESVILLE DEPT OF CIVIL ENGINEERING
|
| The use of contaminant flux and contaminant mass discharge as robust metrics for assessment of risks at contaminated sites, and for evaluating the performance of site remediation efforts has gained increasing acceptance within the scientific, regulatory and user communities. Such gradual increase in acceptance and use of innovative technologies is slower in the environmental community, requiring a sound theoretical basis accepted widely in the technical circles and field- scale demonstration ... |
|
| Lightweight In-Plane Actuated Deformable Mirrors for Space Telescopes |
SEP 2006 |
239 pages |
| Authors:
Michael J. Shepherd; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research focused on lightweight, in-plane actuated, deformable mirrors, with the ultimate goal of developing a 20- meter light gathering aperture for space telescopes. The 0.127 meter diameter deformable mirror small scale testbed was modelled in ?nite elements using MSC.Nastran software and then used as a basis for a quasi-static controller. Experi- mental tracking of Zernike tip, tilt, and defocus modes was accomplished. The analytical solutions to plate-membrane and beam-string ... |
|
| Controlled Heat Flux Combustor (Preprint) |
10 AUG 2006 |
12 pages |
| Authors:
K. J. Wilson; S. L. Fitzpatrick; A. I. Atwood; E. B. Washburn; T. S. Laker; K. P. Ford; NAVAL AIR WARFARE CENTER WEAPONS DIV CHINA LAKE CA
|
| A propane-fueled combustor was built to support the development of an alternate to the external fire test currently required for final hazards classification (HC). The device has the capability to provide a controlled heat flux environment of 20-200 kilowatts/square meter. This results in a repeatable and quantifiable environment for the evaluation of the fast cook-off response of an ordnance item. |
|
| The Rosetta Project: Measuring National Differences |
27 JUN 2006 |
50 pages |
| Authors:
Helen A. Klein; Mei-Hua Lin; Mark Radford; Takahiko Masuda; InCheol Choi; WRIGHT STATE UNIV DAYTON OH
|
| Cross cultural difficulties with coordination, communication, planning, and decision making highlight the limitations of current research in psychology. What is labeled "psychology" is actually "Western psychology" rather than human psychology. Researchers, subjects, and paradigms are primarily from Western nations and outcomes often do not generalize to other samples. Practitioners in many applied domains lack the information and constructs they need take the perspectives of others during international interchanges. While the ... |
|
| Corporate Entrepreneurship Assessment Instrument (CEAI): Systematic Validation of a Measure |
MAR 2006 |
88 pages |
| Authors:
Tassika M. Davis; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| The implementation of corporate entrepreneurship is becoming an important activity for private- and public-sector organizations. Organizational factors have been linked to successful corporate entrepreneurship. The Corporate Entrepreneurship Assessment Instrument (CEAI) is an instrument that attempts to measure the effectiveness of the key internal organizational factors, or climate, that influence innovative activities and behaviors. This study attempted to assess the content validity and factor structure of the CEAI and thus add ... |
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| Strain-Based Displacement Estimation For Precision Spacecraft Structures |
DEC 2005 |
49 pages |
| Authors:
Craig S. Coleman; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL AND ASTRONAUTICAL ENGINEERING
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| For precision spacecraft structures used for antennas and reflectors of telescopes, determination of in-orbit structural displacement and its control is very important. While this kind of measurement is relatively easy to carry out in a laboratory setting, it can be problematic in a real world environment. A procedure for the real-time determination of displacements at any point of a vibrating body can be utilized by measuring strain that is present. ... |
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| Advanced FT-IR Gas Analysis |
DEC 2005 |
236 pages |
| Authors:
James Markham; Patrick Bush; Jr. Bonzani Peter; Jr Scire James; ADVANCED FUEL RESEARCH INC EAST HARTFORD CT
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| The Applied Technology Department at the Arnold Engineering Development Center (AEDC) of Arnold Air Force Base developed a "technology vision" for a rapid, continuous-sweep emissions measurement system that would provide cost-savings benefits and added-value benefits to large-nozzle military engines under development. The project described in this report resulted in a critical component of a system that was demonstrated to accomplish the multiple-species emissions survey of a full nozzle exit within ... |
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| Constellation-X Spectroscopy X-Ray Telescope Segmented Optic Alignment Using Piezoelectric Actuators |
18 NOV 2005 |
165 pages |
| Authors:
Thomas F. Meagher; GEORGE WASHINGTON UNIV WASHINGTON DC SCHOOL OF ENGINEERING AND APPLIED SCIENCE
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| The main instrument for the NASA Constellation-X x-ray observatory is the Spectroscopy X-Ray Telescope (SXT). The SXT is comprised of many thin foil closely nested segmented mirror segments. The mission design requires precise mirror alignment. The contribution of this research is towards the development of the alignment and assembly methods for the SXT optics. The method of alignment uses piezoelectric bending actuators at ten actuation points along the mirror to ... |
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| Improved Aerothermodynamic Measurements of the T63-A-700 Gas Turbine Engine |
SEP 2005 |
77 pages |
| Authors:
Kristine B. Garrott; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This thesis contains an analysis of the failure of the instrumentation ring for measuring the combustor exit temperature and total pressure in the T63-A-700 gas turbine engine. An improved ring design has been constructed and installed. Extensions to the exhaust stacks have been installed to keep the cell temperature reasonable. A water-cooled heat exchanger was installed in place of an air-cooled heat exchanger that was not adequately cooling the oil ... |
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