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This PDF file contains the front matter associated with SPIE Proceedings Volume 8382, including the Title Page, Copyright information, Table of Contents, and the Conference Committee listing.
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A composite signature is a group of signatures that are related in such a way to more completely or further define a target
or operational endeavor at a higher fidelity. This paper builds on previous work developing innovative composite
signatures associated with civil disasters, including physical, chemical and pattern/behavioral. For the composite
signature approach to be successful it requires effective data fusion and visualization. This plays a key role in both
preparedness and the response and recovery which are critical to saving lives. Visualization tools enhance the overall
understanding of the crisis by pulling together and analyzing the data, and providing a clear and complete analysis of the
information to the organizations/agencies dependant on it for a successful operation. An example of this, Freedom Web,
is an easy-to-use data visualization and collaboration solution for use in homeland security, emergency preparedness,
situational awareness, and event management. The solution provides a nationwide common operating picture for all
levels of government through a web based, map interface. The tool was designed to be utilized by non-geospatial
experts and is easily tailored to the specific needs of the users. Consisting of standard COTS and open source databases
and a web server, users can view, edit, share, and highlight information easily and quickly through a standard internet
browser.
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The U.S. Army Research Laboratory (ARL) archives vast amounts of data requiring a secure, portable file format, along
with a versatile software library for storing and accessing its data. Hierarchical Data Format 5 (HDF5) is a popular,
general-purpose library and open-source file format designed for archiving data, and providing extreme interoperability
and data encryption for secure accessibility. This paper will provide an overview of the current state of effectively
integrating encryption algorithms into HDF5 datasets, along with possible applications, expectations, and limitations,
including a discussion on creating a framework for dissemination of sensitive data over the Web.
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The U.S. Army Research Laboratory's Power-Line unmanned aerial vehicle (UAV) Modeling and Simulation
(ARL-PLUMS) is a tool for estimating and analyzing quasi-static electric and magnetic fields due to power lines. This tool consists of an interactive 2-D graphical user interface (GUI) and a compute engine that can be used to calculate and
visualize the E-Field and H-Field due to as many as seven conductors (two 3-phase circuits and a ground wire). ARL-PLUMS allows the user to set the geometry of the lines and the load conditions on those lines, and then calculate Ey, Ez,
Hy, or Hz along a linear path or cutting plane, or in the form of a movie. The path can be along the ground or in the air to
simulate the fields that might be observed, for example, by a robotic vehicle or a UAV. ARL-PLUMS makes several simplifying assumptions in order to allow simulations to be completed on a laptop PC interactively. In most cases, the
results are excellent, providing a "90% solution" in just a few minutes of total modeling and simulation time. This paper describes the physics used by ARL-PLUMS, including the simplifying assumptions and the 2-D Method of Moments
solver. Examples of electric and magnetic fields for different wire configurations, including typical 3-phase distribution and transmissions lines, are provided. Comparisons to similar results using a full 3-D model are also shown, and a discussion of errors that may be expected from the 2-D simulations is provided.
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Nuclear quadrupole resonance (NQR) is a radio frequency (RF) magnetic spectroscopic
technique that has been shown to detect and identify a wide range of explosive materials
containing quadrupolar nuclei. The NQR response signal provides a unique signature of the
material of interest. The signal is, however, very weak and can be masked by non-stationary RF
interference (RFI) and thermal noise, limiting detection distance. In this paper, we investigate the
bounds on the NQR detection range for ammonium nitrate. We leverage a low-cost RFI data
acquisition system composed of inexpensive B-field sensing and commercial-off-the-shelf
(COTS) software-defined radios (SDR). Using collected data as RFI reference signals, we apply
adaptive filtering algorithms to mitigate RFI and enable NQR detection techniques to approach
theoretical range bounds in tactical environments.
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It is well known that Raman spectroscopy suers from low signal-to-noise ratio (SNR). In this paper we oer
a general framework based on quantum illumination that describes Rayleigh and Raman spectroscopy using
an arbitrarily large number of entangled and non-entangled photons. Our objective is to analyze Rayleigh
and Raman spectroscopy as a quantum information channel and study its asymptotic limits. In particular,
if we consider quantum entanglement as an information resource, then the use of entangled photons oers an
exponentially large improvement on the SNR of the Raman spectrometer. That is, the correlations embedded
in quantum entanglement can be exploited to enhance the Raman signature of tested samples.
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Passive radiation detection systems have been developed to screen passengers, vehicles, and cargo for illicit radioactive
sources by measuring gamma and neutron signatures with separate, specialized sensors. The paper introduces a novel
concept combining neutron and gamma sensing in a single detector, thus reducing the overall expense. Low-cost
converter media capture thermal neutrons and commute neutron flux in energetic gammas, which are then detected by a
common gamma detector. Energy signals above 3 MeV indicate the neutron captures. Two prototype systems are
presented: (1) The NCD-BGO, a segmented 655 ml BGO scintillator with embedded Cd absorber, demonstrated an
intrinsic thermal-neutron detection efficiency of about 50%. (2) The PVTNG, comprising 75 l of PVT scintillator
complemented with PVC panels, exhibited a neutron sensitivity of 1.9 cps/ng of 252Cf, thus almost meeting the
corresponding requirement for Radiation Portal Monitors. Moreover, an unconventional construction of scintillator and
light readout, combined with innovative electronics and proper detector stabilization, improved the gamma detector
performance noticeably and enabled nuclide identification.
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Linear-accelerator (LINAC) driven active interrogation systems are under increasing investigation for the detection and
characterization of nuclear materials, such as uranium-235.
Prompt-neutron emission during active interrogation is not
unique to fissionable material; photoneutron reactions occur in common materials such as lead. Consequently, accurate
simulation of the yield, multiplicity, and energy spectra of photoneutrons, as well as the detector response, is paramount
in designing an effective interrogation system. Advanced Monte Carlo codes such as MCNPX-PoliMi are ideal for
simulating these quantities. In this paper, we present new results of simulations performed with MCNPX-PoliMi using
LINAC-based interrogating sources on HEU, depleted uranium, and lead.
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The SDA (Spectral Dynamics Analysis) method was applied for the detection and identification of two mixtures of
explosive (Hexogen-Trinitrotoluene-Penthryte and
Hexogen-Trinitrotoluene-Octogen) hidden under various
coverings - the thin, rough, thick layers of Polyethylene foils and a layer of cotton. The main difficulty for identification consists in
fact that the mixtures have practically identical spectral properties both in the Stand-Off (reflection nearly at 90°) and
Specular (reflection at 45°) mode. The presence of covering makes additional difficulties for identification because it
distorts the spectral properties of the reflected THz signal. Nevertheless, it is possible to find the identifiers
characterizing the presence of the individual explosive in the mixtures under the covering analyzing the spectrograms
and dynamics of spectral lines of the main pulses and the sub-pulses following the main pulse.
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Calculations are presented of ground state resonance structure associated with water complexes of -HMX using
density functional theory (DFT), which is for subsequent construction of permittivity functions to be used for
simulations of explosives detection within a humid environment. The DFT software GAUSSIAN was used for
the calculations of ground state resonance structure presented.
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The National Institute of Standards and Technology conducts an ongoing series of Speaker
Recognition Evaluations (SRE). Speaker detection performance is measured using a detection cost
function defined as a weighted sum of the probabilities of type I and type II errors. The sampling
variability can result in measurement uncertainties. In our prior study, the data independency was
assumed in using the nonparametric two-sample bootstrap method to compute the standard errors
(SE) of the detection cost function based on our extensive bootstrap variability studies in ROC
analysis on large datasets. In this article, the data dependency caused by multiple uses of the same
subjects is taken into account. The data are grouped into target sets and non-target sets, and each set
contains multiple scores. One-layer and two-layer bootstrap methods are proposed based on whether
the two-sample bootstrap resampling takes place only on target sets and non-target sets, or
subsequently on target scores and non-target scores within the sets, respectively. The SEs of the
detection cost function using these two methods along with those with the assumption of data
independency are compared. It is found that the data dependency increases both estimated SEs and
the variations of SEs. Some suggestions regarding the test design are provided.
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Speckle is a well-investigated interference phenomenon that is produced by coherent light scattering off a rough surface.
While speckle is often considered a noise source, it can be used to obtain information about the object. We investigate a
non-imaging technique using speckle statistics to estimate object articulation. It is known that the speckle intensity in
the far field depends on two factors: the illumination distribution at the object and the field correlation properties of the
materials composing the object. It is anticipated that as an object articulates, perhaps periodically as in a person
walking, the object illumination distribution, and therefore average speckle size in the far field, will vary in time. An
estimate of the time variation of the average speckle size can then be used to estimate the motion of the object. In this
paper we investigate, through simulation and lab experiments, the effect of object articulation on speckle statistics. We
find that the motion of a person walking will produce a measurable variation in speckle statistics (intensity correlation
function) and that the correlation function can be estimated from a single speckle realization.
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The carotid artery has been used extensively by researchers to demonstrate that Laser Doppler Vibrometry (LDV)
is capable of exploiting vital sign signatures from cooperative human subjects at stando. Research indicates
that, the carotid, although good for cooperative and non-traumatic scenarios, is one of the first vital signs to
become absent or irregular when a casualty is hemorrhaging and in progress to circulatory (hypovolemic) shock.
In an effort to determine the optimal site and wavelength to measure vital signs off human skin, a human subject
data collection was executed whereby 14 subjects had their spectral skin reflectivity and vital signs measured at
five collection sites (carotid artery, chest, back, right wrist and left wrist). In this paper, we present our findings
on using LDV and re
ectivity data to determine the optimal collection site and wavelength that should be used
to sense pulse signals from quiet and relatively motionless human subjects at stando. In particular, we correlate
maximum levels of re
ectivity across the ensemble of 14 subjects with vital sign measurements made with an
LDV at two ranges, for two scenarios.
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Modern infrared camouflage and countermeasure technologies used in the context of military operations have evolved
rapidly over the last decade. Indeed, some infrared seekers and decoy/flares tend to have spectral sensitivity tailored to
closely match the emission signatures of military vehicles (such as aircrafts, tanks) and reject other sources. Similarly,
some candles (or smoke bombs) are developed to generate large area screens with very high absorption in the infrared.
The Military University of Technology has conducted an intensive field campaign where various types of flares and
smoke candles were deployed in different conditions and measured. The high spectral, spatial and temporal resolution
acquisition of these thermodynamic events was recorded with the Telops Hyper-Cam.
The Hyper-Cam enables simultaneous acquisition of spatial and spectral information at high resolutions in both domains.
The ability to study combustion systems with high resolution, co-registered imagery and spectral data is made possible.
This paper presents the test campaign concept and definition and the analysis of the recorded measurements.
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In today's electro-optic warfare era, it is more than vital for one nation's defense to possess the most advanced
measurement and signature intelligence (MASINT) capabilities. This is critical to gain a strategic advantage in the
planning of the military operations and deployments. The thermal infrared region of the electromagnetic spectrum is a
key region that is exploited for infrared reconnaissance and surveillance missions. The Military University of
Technology has conducted an intensive measurement campaign of various soldier's camouflage devices in the scope of
building a database of infrared signatures. One of today's key technologies required to perform signature measurements
has become infrared hyperspectral and broadband/multispectral imaging sensors. The Telops Hyper-Cam LW product
represents a unique commercial offering with outstanding performances and versatility for the collection of hyperspectral
infrared images. The Hyper-Cam allows for the infrared imagery of a target (320 × 256 pixels) at a very high spectral
resolution (down to 0.25 cm-1). Moreover, the Military University of Technology has made use of a suite of scientific
grade commercial infrared cameras to further measure and assess the targets from a broadband/multispectral perspective.
The experiment concept and measurement results are presented in this paper.
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Seismic footstep detection based systems for homeland security applications are important to perimeter protection
and other security systems. This paper reports seismic footstep signal separation for a walking horse and a
walking human. The well-known Independent Component Analysis (ICA) approach is employed to accomplish
this task. ICA techniques have become widely used in audio analysis and source separation. The concept of
lCA may actually be seen as an extension of the principal component analysis (PCA), which can only impose
independence up to the second order and, consequently, defines directions that are orthogonal. They can also be
used in conjunction with a classification method to achieve a high percentage of correct classification and reduce
false alarms. In this paper, an ICA based algorithm is developed and implemented on seismic data of human
and horse footsteps. The performance of this method is very promising and is demonstrated by the experimental
results.
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Triboelectric (frictional) and combustion processes impart electrostatic charge on projectiles as they are fired. Additional
charging and discharging processes alter the magnitude of charge
in-flight and are complex functions of a plethora of
environmental conditions. There is an interest in using electric-field sensors to help detect and track projectiles in
counter-sniper and projectile ranging systems. These applications require knowledge of the quantity of charge, as well as
the sensitivity of electric-field sensors.
The U.S. Army Research Laboratory (ARL) took part in multiple experiments at Aberdeen Proving Grounds (APG) to
simulate a battlefield-like environment. Sensors were placed in strategic locations along the bullets' paths and recorded
the electric-field signatures of charged small-arms bullets. The focus of this effort was to analyze the electric-field
signatures collected during the APG experiment in order to estimate electrostatic charge on the bullets. Algorithms were
written to extract electric-field bullet signatures from raw data; these signatures were further processed to estimate the
miss distance, velocity and charge. The estimates of range and velocity were compared to similar estimates from
acoustic signatures for verification. Ground-truth Global Positioning System (GPS) data were used to independently
calculate ranges, azimuths, and miss distances. Signatures were filtered to remove clutter signals from power lines and
other unwanted field sources. Closed-form equations were then fitted to the collected signatures to retrieve estimates for
the magnitude of charge on the bullets.
Test data, collected with sensors placed on a wall, showed enhanced E-field intensity. A Method of Moments (MoM)
model of the wall was created to improve signature simulation. Detectable charges on bullets were found to exist in the 1
pC to 1 nC (10-12 - 10-9 C) range. Relationships between estimated charge, gun type, bullet caliber, noise thresholds and
number of shots in sequence are presented and statistically analyzed.
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We address the problem of searching large amounts of 3D point set data for specific objects of interest, as characterized
by their surface shape. Motivating applications include the detection of ambush weapons from a convoy and the search
for objects of interest on the ground from an aircraft. Such data can occur in the form of relatively unstructured point
sets or range images, and can be derived from a variety of sensors. We study here the performance of Tripod Operators
(TOs) on synthetic range image data containing the shape of an oil drum; a cylinder with planar top. Tripod Operators
are an efficient method of extracting coordinate invariant shape information from surface shape representations using
discrete samples extracted in a specially constrained manner. They can be used in a variety of ways as components of a
system which performs detection, recognition and localization of objects based on their surface shape. We present
experimental results which characterize the approximate accuracy of detection of the test shape as a function of the
accuracy of the surface shape data. This is motivated by the need for an estimate of the required accuracy of 3D
surveillance data to enable detection of specific shapes.
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The U.S. Army is interested in developing low-cost, low-power, non-line-of-sight sensors for monitoring human
activity. One modality that is often overlooked is active acoustics using sources of opportunity such as speech or
music. Active acoustics can be used to detect human activity by generating acoustic images of an area at different
times, then testing for changes among the imagery.
A change detection algorithm was developed to detect physical changes in a building, such as a door changing
positions or a large box being moved using acoustics sources of opportunity. The algorithm is based on cross
correlating the acoustic signal measured from two microphones. The performance of the algorithm was shown
using data generated with a hand-held FM radio as a sound source and two microphones. The algorithm could
detect a door being opened in a hallway.
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Characterizing atmospheric turbulence through modeling dates back to the 1960's. For decades scientists have
studied how to mitigate the effects of the atmospheric turbulence on communications and imaging systems, but learning
how to use those properties of the atmosphere instead of mitigate them raise new challenges. Due to the fact that
atmospheric turbulence is inherently a random process, it can be an ideal "key generator" for strongly secure information
transfer. The purpose of this effort is to investigate to what extent the atmospheric turbulence can be exploited as a
robust random number generator. In this paper we report the progress in characterizing the atmosphere and a random bitstream
generator.
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With the successful completion of a field demonstration of uplink arraying at 8 GHz (X-band) using real-time
atmospheric compensation enabled by phase transfer rather than time transfer techniques- completion in mid-Aug 2010, NASA is interested in demonstrating a similar capability at 30-31 GHz (Ka band). Such a
demonstration would enable NASA to establish [a] a high power, high resolution, 24 / 7 availability radar system
for characterizing observations of Near Earth Objects, determining the statistics of small [≤10cm] orbital debris,
[ b ] to incorporate the capability into its space communication and navigation tracking stations for emergency
spacecraft commanding in the Ka band era which NASA is entering and [c] to field capabilities of interest to
other US government agencies. We describe a a project of Evolutionary Steps Leading to Revolutionary
Increases in Capability and Capacity
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