Adaptive Zoom Riflescope Prototype Has Push-Button Magnification

When an Army Special Forces officer‑turned engineer puts his mind to designing a military riflescope, he doesn’t forget the importance of creating something for the soldiers who will carry it that is easy to use, extremely accurate, light‑weight and has long‑lasting battery power. The result is the Rapid Adaptive Zoom for Assault Rifles (RAZAR) prototype, developed by Sandia National Laboratories optical engineer Brett Bagwell. At the push of a button, RAZAR can toggle between high and low magnifications, enabling soldiers to zoom in without having to remove their eyes from their targets or their hands from their rifles.

Posted in: News, Defense, Optics, Photonics


Killer Robots - Army Studies Challenges of Remote Lethality

The military has used and experimented with robots that perform functions such as scouting and surveillance, carrying supplies and detecting and disposing of improvised homemade bombs. However, when it comes to integrating lethality, such as a weapon capable of firing 10 rounds per second onto an unmanned ground vehicle, issues arise such as safety, effectiveness and reliability, as well as military doctrine on how much human involvement is required.

Posted in: News, Communications, Defense, Machinery & Automation, Robotics


Technique Generates Electricity from Mechanical Vibrations

Research scientists at VTT Technical Research Centre of Finland have demonstrated a new technique for generating electrical energy. The method can be used in harvesting energy from mechanical vibrations of the environment and converting it into electricity. Energy harvesters are needed in wireless self-powered sensors and medical implants, where they could ultimately replace batteries. The technology could be introduced on an industrial scale within three to six years.

Posted in: News, Electronics & Computers, Power Management, Energy, Energy Harvesting, Semiconductors & ICs


Car Could be Powered by Its Own Body Panels

A car powered by its own body panels could soon be driving on our roads after a breakthrough in nanotechnology research by a Queensland University of Technology (Australia) team. They developed lightweight supercapacitors that can be combined with regular batteries to dramatically boost the power of an electric car. The supercapacitors were made into a thin and extremely strong film with a high power density.

Posted in: News, Automotive


Singapore Launches First Driverless Vehicles for Public

Researchers and engineers from the Singapore — MIT Alliance for Research and Technology (SMART) and the National University of Singapore (NUS) are deploying two driverless vehicles, free‑of‑charge, for public use. They will feature vehicle‑to‑vehicle communications that will allow each vehicle to know where the other vehicle is.

Posted in: News, Automotive


Researchers Measure Stress in 3D-Printed Metal Parts

Lawrence Livermore National Laboratory researchers have developed an efficient method to measure residual stress in metal parts produced by powder-bed fusion additive manufacturing (AM).The 3D-printing process produces metal parts layer by layer using a high-energy laser beam to fuse metal powder particles. When each layer is complete, the build platform moves downward by the thickness of one layer, and a new powder layer is spread on the previous layer.While the method produces quality parts and components, residual stress is a major problem during the fabrication process. Large temperature changes near the last melt spot, and the repetition of this process, result in localized expansion and contraction.An LLNL research team, led by engineer Amanda Wu, has developed an accurate residual stress measurement method that combines traditional stress-relieving methods (destructive analysis) with modern technology: digital image correlation (DIC). The process provides fast and accurate measurements of surface-level residual stresses in AM parts.The team used DIC to produce a set of quantified residual stress data for AM, exploring laser parameters. DIC is a cost-effective, image analysis method in which a dual camera setup is used to photograph an AM part once before it’s removed from the build plate for analysis and once after. The part is imaged, removed, and then re-imaged to measure the external residual stress.SourceAlso: Learn about Design and Analysis of Metal-to-Composite Nozzle Extension Joints.

Posted in: News, Cameras, Imaging, Manufacturing & Prototyping, Rapid Prototyping & Tooling, Materials, Metals, Lasers & Laser Systems, Photonics, Measuring Instruments, Test & Measurement


NASA Computer Model Reveals Carbon Dioxide Levels

An ultra-high-resolution NASA computer model has given scientists a stunning new look at how carbon dioxide in the atmosphere travels around the globe.Plumes of carbon dioxide in the simulation swirl and shift as winds disperse the greenhouse gas away from its sources. The simulation also illustrates differences in carbon dioxide levels in the northern and southern hemispheres, and distinct swings in global carbon dioxide concentrations as the growth cycle of plants and trees changes with the seasons.Scientists have made ground-based measurements of carbon dioxide for decades and in July NASA launched the Orbiting Carbon Observatory-2 (OCO-2) satellite to make global, space-based carbon observations. But the simulation — the product of a new computer model that is among the highest-resolution ever created — is the first to show in such fine detail how carbon dioxide actually moves through the atmosphere.In addition to providing a striking visual description of the movements of an invisible gas like carbon dioxide, as it is blown by the winds, this kind of high-resolution simulation will help scientists better project future climate. Engineers can also use this model to test new satellite instrument concepts to gauge their usefulness. The model allows engineers to build and operate a “virtual” instrument inside a computer.SourceAlso: Learn about the NASA Data Acquisition System (NDAS).

Posted in: News, Aerospace, Electronics & Computers, Environmental Monitoring, Green Design & Manufacturing, Greenhouse Gases, Software, Measuring Instruments, Test & Measurement


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