Keyword: Mathematical models

Briefs: Physical Sciences

Given the current emphasis on sustainability, there is a growing interest in monitoring various facets of building resource consumption. Building monitoring and automation...

Articles: Aerospace

For C programmers working on safety-critical applications, following restrictions and guidelines to ensure safe-coding practices can be painful. Features of the language designed to make your work easier, more efficient, or...

Briefs: Physical Sciences

Given remote and direct physical measurements of a realistic ocean wavefield, the goal of this work was to obtain a high-resolution description of the...

Articles: Aerospace

Unmanned aerial vehicles (UAVs) are critical to today’s intelligence, surveillance, and reconnaissance (ISR) missions, supplying valuable aerial imagery to ground forces. Small UAV systems are a highly flexible ISR solution...

Articles: Test & Measurement

The rapid evolution of commercial technologies such as Long Term Evolution (LTE) is becoming more attractive for Software-Defined Radio (SDR) and public safety...

Application Briefs: Defense

Advanced Optical Technologies, Inc. (AOT) has been awarded a Phase 2 SBIR contract to develop a next-generation laser polarimeter for the US Army RDECOM CERDEC Night Vision and Electronic Sensors...

Briefs: RF & Microwave Electronics

With its international headquarters in Germany, IAV Automotive Engineering is one of the leading engineering and design providers for the automotive industry, working for...

Articles: Electronics & Computers

From the first computers of the 1940s through the machines of the 1990s, all computer systems were CPUbound. In other words, the I/O interfaces...

Briefs: Information Technology

For nighttime surveillance, acquisition of visible light imagery is impractical due to the lack of illumination. Thermal imaging, which acquires mid-wave infrared or long-wave infrared radiation naturally...

Articles: Photonics/Optics

While most ordnance is now laserguided, there is still much work to be done on the defensive detection of laser designators. Hence the growing need for advanced laser-warning systems (LWS). While multiple...

Briefs: Electronics & Computers

The scientific community is interested in using field-programmable gate arrays (FPGAs) for scientific computations because they can be targeted for specific...

Briefs: Information Technology

When working sequences of images, registration of the frames to a common point of reference is an essential prerequisite for many types of image analysis. The phase...

Briefs: Electronics & Computers

A breadboard system has been developed for demonstrating nonmechanical zoom using flexible thin films. The project consists of three major task areas: material characterization,...

Briefs: Information Technology

When required to reverse-engineer a product, engineers often do not have design specifications for the system, and the machine may not be disassembled or invasively examined. The...

Articles: Robotics, Automation & Control

The US Army has announced plans to increase the autonomy of its Unmanned Ground Vehicles (UGVs). “We are moving along that spectrum from tele-operating to semi-autonomy where you...

Briefs: Information Technology
Data Fusion of Geographically Dispersed Information for Test and Evaluation

Test and evaluation relies on computer collection and manipulation of data from a myriad of sensors and sources. More computing power allows for increases in the breadth and depth of the information collected. The same computing power must assist in identifying,...

Briefs: Electronics & Computers

Analyzing microelectromechanical system (MEMS) switch behavior is a new field of study that guides the production of MEMS switches. One issue of primary importance is the degradation of...

Briefs: Electronics & Computers
Test and Evaluation Uses of Heterogeneous Computing

T est and evaluation of current systems is a time-consuming process that reflects both the intricacies of the object of the test and the range of equipment, personnel, and environments required. Many argue that this process consumes far too much of the time that it takes to put new systems into...

Briefs: Physical Sciences
Ultrasonic Guided Wave Analysis for Detecting and Classifying Damage in a Thin Metallic Plate

A ircraft and rotorcraft structures are being redesigned with new lower weight materials; however, older metallic structures continue to be used. These older structures need monitoring and characterization of damage for con-

tinued operation. The...

Briefs: Electronics & Computers

A need exists for small, autonomic systems in the battlefield. Autonomy allows the creation of unmanned systems to perform complex, high-risk, and/or covert operations in the battlefield without the need...

Articles: RF & Microwave Electronics

Over the past 20 years, software defined radio techniques have not only revolutionized radar and communications systems, but they have also boosted system performance levels. One of the...

Briefs: Physical Sciences
Compressive Oversampling for Robust Data Transmission in Sensor Networks

A paper discusses recent developments in the area of Compressive Sensing (CS) for data loss in wireless sensing applications. Since many physical signals of interest are known to be sparse or compressible, employing CS not only compresses the data and reduces the effective...

Articles: Aerospace

The James Webb Space Telescope (JWST), the next big telescope at NASA, will be placed at a stable Lagrange point approximately 1 million miles from the Earth. This telescope is the next stepping...

Briefs: Information Technology
Flexible Computing Architecture for Real-Time Skin Detection

In both the Air Force and search and rescue (SAR) communities, there is a need to detect and characterize persons. Existing methods use red-green-blue (RGB) imagery, but produce high false alarm rates. New technology in multispectral skin detection is better than the existing RGB...

Briefs: Photonics/Optics

This work explored the concept of creating a partially coherent laser beam consisting of an array of spatially overlapping or separated Gaussian beams with possible individual...

Briefs: Mechanical & Fluid Systems

Induction motors often are the preferred choice among industrial motors due to the modern power electronics that improve their speed control. Vitally...

Briefs: Electronics & Computers

Forensic characterization of a wireless device is useful in many applications. An example of this is in the testing of Federal Communications Commission (FCC) Part 15 devices that must adhere to strict guidelines...

Briefs: Test & Measurement
Analysis of Clustering Tools for Moving Target Indication

Current and future forces operating in urban environments need the capability to detect slow-moving personnel inside buildings. To accomplish this, a time-domain approach was developed that uses a low-frequency, ultra-wideband (UWB) radar with a transmit pulse capable of penetrating...

Briefs: Electronics & Computers
Field-Programmable Gate Array-Based Software-Defined Radio

There are existing wideband communications systems that were built using field-programmable gate array (FPGA)-based software-defined radio (SDR) designs. Despite the inherent advantages of these systems, some are functionally restricted by limited output bandwidth.