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Effect of Acceleration Frequency on Spatial Orientation Mechanisms

Extreme motion environments can induce loss of visual acuity, motion sickness, and spatial disorientation. Understanding how human sensory integration of acceleration stimuli affects spatial awareness will improve models of spatial disorientation and mishap analysis. While there are numerous studies describing vestibular semicircular canal responses to angular acceleration, less is known about vestibular otolith responses to linear acceleration. This gap in knowledge is important to resolve, since seasickness and airsickness are highly dependent on the predominant frequency of a linear acceleration stimulus.

Posted in: Briefs, Medical, Body regions, Human factors, Nervous system, Vehicle acceleration, Vehicle dynamics
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Localization of Head-Mounted Vibrotactile Transducers

T he human sensory systems most frequently used in military displays (vision and audition) are sometimes overloaded. When soldiers rely on visual or auditory displays, their situation awareness can be degraded due to the need to attend to the display. A proposed alternative sensory channel for soldier displays is the tactile channel. In military applications, VT displays are primarily being used to aid in orientation, navigation, and communication. Tactile displays can also be used to impart more abstract information such as in command-and-control applications.

Posted in: Briefs, Physical Sciences, Displays, Vibration, Helmets, Military vehicles and equipment
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Using Polyimide In 3D Thin Film Multilayer Circuitry

Today, the cost and complexity of all platforms and systems in military and defense technologies are being challenged by the need for high functionality in smaller but less expensive architecture, especially in light of current national budget challenges. In the area of RF and microwave electronics it is becoming evident that a move from two dimensional (2D) planar circuitry architecture to three dimensional (3D) thin film multilayer technology can result in dramatic reduction of chip size, increase of operation speed, and lower total module costs.

Posted in: Articles, Aerospace, Architecture, Integrated circuits, Polymers, Military vehicles and equipment
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Field Configurable MIL-DTL-55181 Power Distribution

The proliferation of scalable tactical equipment has driven the need for field configurable power-distribution systems. A stacking-interconnect technology has been developed that utilizes the same mating interfaces and locking mechanisms as standard MILDTL- 55181 connectors without the logistics planning and storage space requirements of Y-cables and power distribution panels.

Posted in: Articles, Defense, Architecture, Connectors and terminals, Integrated circuits, Electric power, Military vehicles and equipment
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Designing Thermal Management Systems for Smaller, Lighter Avionics

The avionics systems of military aircraft support maneuverability and situation awareness for the pilot, process essential images, operate sensors, record data, and provide for broadcast and communication between home base and wingman. The newest generation of military aircraft cannot be flown without avionics, and modern combat is making the leap to electronic warfare.

Posted in: Articles, Aerospace, Avionics, Thermal management, Military aircraft
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Optical Muzzle Flash Detection Sensors

An optical detector technology from Cal Sensors detects muzzle flash from over 100 meters away. Operating at the speed of light, optical flash detection systems provide an almost instantaneous response to a gunfire event. The realtime detection capabilities give the targets the critical seconds needed to duck and apply counter-measures.

Posted in: Application Briefs, Optics, Sensors and actuators, Surveillance, Military vehicles and equipment
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Line-of-Sight Radio

The U.S. Air Force has selected Cambium Networks’ pointto- point (PTP) 45600 High Capacity Line-of-Sight (HCLOS) radio for its Theater Deployable Communications program of record (TDC PMO). Supported by General Dynamics, TDC PMO will replace its legacy Radio Frequency Module (RFM) backhaul radio with Cambium’s PTP 45600 HCLOS technology, providing secure voice, video, and data functions for both deployable warfighters and first response missions.

Posted in: Application Briefs, Radio equipment, Telecommunications systems, Military vehicles and equipment, Rescue and emergency vehicles and equipment
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Thermal System Reduces Munitions Stockpiles

Harper International has been selected by U.S. Demil, LLC (USD) for the design of a continuous, indirect Rotary Thermal Treatment Unit (TTU). The equipment will support US Department of Defense efforts directed at reducing and recycling large stockpiles of excess, obsolete, and unserviceable munitions for safety and environmental purposes.

Posted in: Application Briefs, Defense, Recycling, Waste management, Product development, Suppliers, Industrial vehicles and equipment, Military vehicles and equipment
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Using RF Technology to Form a Wireless Network Under Water

Consumers have shown that they are eager to be rid of cabling and wires connecting them to devices situated or worn near or on the body. From athletic monitoring devices to headphones, and computer mice to cellphone hands-free kits, manufacturers have met a demand for connectivity without wires through the application of short-range RF technology.

Posted in: Articles, RFM Catchall, Aerospace, Radio equipment, Wireless communication systems, Water, Marine vehicles and equipment
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Oil Pipeline Fault Detection System Determines Material Permittivity at Microwave Frequencies

Researching fault location techniques for the oil industry requires data on the complex permittivity of the polyamide Rilsan at microwave frequencies. Rilsan is a vital material used in oil pipe construction. Currently there is no published data for the complex permittivity of Rilsan. The task for this project was to develop an accurate method to measure the complex permittivity of Rilsan to gain an understanding of the dielectric relaxations that occur within it. A fast, accurate method was developed using a vector network analyzer (VNA) and rectangular waveguide.

Posted in: Articles, Detectors, Waveguides, Research and development, Materials properties, Test equipment and instrumentation, Test procedures, Mining vehicles and equipment
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