http://www.ntis.gov/rss/RSSNTISCategoryList.aspxNational Technical Reports Libraryen(c) 2008, National Technical Information Service. All rights reserved.5http://www.ntis.gov/images/logoRSS.jpghttp://www.ntis.govThe state of the ground can change dramatically in response to changing meteorological influences and physical disturbances of the ground (e.g. tilling) that are important to many civilian and military activities. Permeability is the fundamental para ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505834In space-based infrared ballistic missile defense sensor systems, cluttered backgrounds are typically much more intense than the equivalent sensor noise or the targets being detected. Therefore, the development of efficient clutter removal and target ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505646The acoustic signature of a rotorcraft is often the primary means of detection and identification by enemy forces in the modern battlespace. Additionally, this detection is often accomplished without the need for the sophisticated sensing equipment r ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505765Musculoskeletal soft tissue injuries during combat are a source of debilitating pain, the treatment and evaluation of which pose a significant challenge to the orthopedic community. Extracellular matrix (ECM) scaffolds derived from various sources an ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505736The dependence of seismic source coupling of underground nuclear explosions on the characteristics of the Q explosion source medium is an important consideration in any assessment of nuclear test monitoring capability. In particular, while experience ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505385This is the report of the first behavioral response study to be carried out on beaked and pilot whales in which these animals were exposed to carefully measured doses of underwater sound while their responses were being measured. The study is seen as ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505860We study time delay estimation (TDE) on parallel channels with flat fading. Several models for the channel gains are considered, and for each case we present the maximum likelihood estimator (MLE), the Cramer-Rao bound (CRB), and the Ziv-Zakai bound ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505459Data on the responsiveness of free-ranging cetaceans to mid- frequency sonar signals are lacking, with only a few species having been studied in relation to a few types of sonar signals, mostly SURTASSLFA. This specific project was initially motivate ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505653Many Army applications, such as driver vision enhancement (DVE), rifle sights, seekers, physical security, target acquisition, and fire control, would benefit from affordable, passive uncooled infrared (IR) sensor options. The main considerations for ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505711This paper describes how monomeric bR can be overproduced in Escherichia coli and subsequently utilized as an integral component of a generic, nanoscale chemical sensing platform. The utility of this sensing platform is that it can be adapted for det ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505792We report the status of ongoing activities in development of a compact, low-power atomic time/frequency standard, the Chip-Scale Atomic Clock (CSAC). The status of efforts addressing the refinement of the CSAC for improved mechanical and environmenta ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505746L-3 Communications Cincinnati Electronics (CE), the Army Research Laboratory (ARL), and the Army Night Vision and Electronic Sensors Directorate (NVESD) have been developing the corrugated quantum well infrared photodetector (C-QWIP) technology for a ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505709Habitats characterized by high spatial variation in absolute light levels and spectral quality present a challenge to animals that rely on visual orientation and visual target discrimination. Insects, in particular, face several difficulties in visua ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505822Detecting mud hazards is a significant challenge to UGV autonomous off-road navigation. A military UGV stuck in a mud body during a mission may need to be sacrificed or rescued, both unattractive options. JPL is currently developing a daytime mud det ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505685Advances in sensor imaging technologies permit the Soldier to extend mission performance beyond daytime operations and into the night. Visual helmet- mounted displays (HMDs) have increasingly been used to provide supplemental information to the Soldi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505752Walking is generally viewed as an automatized skill, requiring little ongoing attentional control in neurologically intact adults. However, a growing body of research demonstrates that attention is required when moving over difficult terrain. This ha ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505850A priori knowledge of clutter environments is critical for understanding target detection performance from airborne sensors and optimally predicting future performance to aid in mission planning. Modern airborne lidar, also known as Airborne Laser Sw ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505747An important area of investigation in robotics perception and intelligent control concerns the ability to detect, track, and avoid humans operating in proximity to an unmanned ground vehicle (UGV). Under the Army Research Laboratory (ARL) Robotics Co ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505754The early body-wave coda of far-regional events (14' - 29' degrees) contains triplicated arrivals from upper-mantle discontinuities that, when properly identified, can improve seismic monitoring functions. However, far- regional seismograms are typic ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505354The Joint Advanced Distributed Simulation (JADS) Joint Test and Evaluation (JT&E) was chartered by the Deputy Director, Test, Systems Engineering and Evaluation (Test and Evaluation), Office of the Secretary of Defense (OSD) (Acquisition and Technolo ...http://www.ntis.gov/search/product.aspx?ABBR=ADM001224The primary goal of our project is to provide advanced undergraduates, graduate students, and postdoctoral investigators with a broad understanding of ocean acoustics as well as the techniques used to study the ecology of marine animals in situ. By b ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506143Availability of service in many wireless networks depends on the ability for network users to establish and maintain communication channels using control messages from base stations and other users. An adversary with knowledge of the underlying commu ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505651This work is intended to provide automated methodology for processing seismic and infrasound data from seismo-acoustic arrays and to apply the methodology to regional networks for validation with ground truth information. As reported last year, the p ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505417This issue of the Naval Law Review contains the following articles: 'Responding to Transnational Terrorism under the Jus Ad Bellum: A Normative Framework,' by Michael N. Schmitt; 'A Comfortable Sofa: The Need for an Equitable Foreign Criminal Jurisdi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505358In this report a new Illuminator of Opportunity / Passive Coherent Location research project being conducted in the Microwave Radar Branch of EWRD at DSTO is discussed. Details are provided about such aspects as transmitter selection and characterist ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506106A novel method for online tracking of the changes in the nonlinearity within complex-valued signals is introduced. This is achieved by a collaborative adaptive signal processing approach by means of a hybrid filter. By tracking the dynamics of the ad ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505362To understand the dynamics of airborne particulate intrusion into a space telescope, a mechanistic model based on mass balance was developed to predict the extent to which ambient particles penetrate through vent holes and enter the interiors after t ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505618The long-term goals of this project are to contribute towards the development of a science-based sonar use policy for the US Navy which reduces the risk of injury to beaked whales from mid-frequency sonar. This project will also increase our understa ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505862The resolution of a homodyne LADAR can be enhanced significantly by applying quantum optical techniques in the receiver. With a quantum image enhancer (QIE) inserted between the receive optics and the detector of a LADAR, an angular cell resolution i ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506209Accurately estimating the person's head position and orientation is an important task for a wide range of applications such as driver awareness and human-robot interaction. Over the past two decades, many approaches have been suggested to solve this ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505847The preceding article of this two part series (TRP, Winter 1996, p. 15) examined a very basic reactive control scheme that could be used to intelligently direct the motions of the prototype security robot ROBART I operating in very structured and rel ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506192Seismo-acoustic measurements provide an opportunity to quantify natural and man-made sources that are at or near the Earth's surface. We have operated three acoustic arrays collocated with seismometers from the University of Utah Seismograph Stations ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505352Nanoelectronic devices form the building blocks of the nanoscaled systems and require innovative technologies for their realization. Single Electron Transistors (SET) is a novel class of nano transistor which operates on the principle of Coulomb bloc ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505733Understanding turbulence effects on wave propagation and imaging systems has been an active research area for more than 50 years. Conventional atmospheric optics methods use statistical models to analyze image degradation effects that are caused by t ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506014We describe a text classification approach based on statistical language modeling. We show how this approach can be used for several natural language processing tasks in a virtual human system. Specifically, we show it can be applied to language unde ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505848Accurate corrections for distance, source size, and site effects are needed for reliable use of regional seismic phases for discrimination and magnitude estimation. Procedures that simultaneously invert for attenuation, geometrical spreading, site, a ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505383We present a data-driven approach for target detection and identification based on a linear mixture model. Our aim is to determine the existence of certain targets in a mixture without specific information on the targets or the background, and to ide ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505394A feeder program is utilized for collecting and reading in and maintaining a time synchronization for combat fire solutions which may include threat containment regions. The threat containment regions are defined in terms of a probability of at least ...http://www.ntis.gov/search/product.aspx?ABBR=ADD020411In this paper, we present the design of a reconfigurable antenna based on the dynamic tuning of a planar system that consists of a loop antenna, metamaterial spilt ring resonators (SRRs), and heterojunction photo transistors (HPTs). Simulation result ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505855An immersive technology being developed by the Army to provide enhanced situation awareness for military personnel involves the use of tactile stimulators arranged in a matrix pattern surrounding the torso. When activated sequentially the tactile dis ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505849A seismic/acoustic array was developed to detect activity in clandestine tunnels. The geologic setting of the area that encloses clandestine tunneling activity can preclude use of traditional tunnel-detection technologies such as ground-penetrating r ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505829