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Aerospace & Defense Technology: December 2019

  • Magazine Issue
  • 19AERP12
Published 2019-11-28 by SAE International in United States
Engineered Solutions for Enclosure Sealing and InsulationTips for Reducing Error When Using Eddy Current Measuring TechniquesReducing the High Cost of TitaniumStreamlining Post-Processing in Additive ManufacturingSoftware-Defined Analog Filters: A Paradigm Shift in Radio Filter Performance and CapabilitySDR Interface for the NeXtRAD Multistatic Radar SystemElectrodeposition of Metal Matrix Composites and Materials Characterization for Thin-Film Solar Cells Metal matrix composites, which consist of silver-multiwalled carbon nanotube-silver, layer-by-layer stacks, can electrically bridge the cracks (>40 μm) that appear in semiconductor substrates and the composite grid lines.Sensing Applied Load and Damage Effects in Composites with Nondestructive Techniques Comparing and correlating piezoelectrically induced guided waves, acoustic emission, thermography, and X-ray imaging to determine the effects of applied load on a composite structure.Technology Impact Forecasting for Multi-Functional Composites Multi-functional composites offer a possible solution to the conflicting design goals of making new aircraft lighter, stronger, faster, and more environmentally sustainable.Molecular Engineering for Mechanically Resilient and Stretchable Electronic Polymers and Composites Establishing the design criteria for elasticity and ductility in conjugated polymers and composites by analysis of the structural determinants of the mechanical…
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Development of a Graphical User Interface (GUI) Based Tool for Vehicle Dynamics Evaluation

Mahindra & Mahindra, Ltd.-Divyanshu Joshi, Saravanan Muthiah
Mahindra Research Valley-Shubham Kedia
  • Technical Paper
  • 2019-28-2397
Published 2019-11-21 by SAE International in United States
Objective metrics for performance evaluation of ride, handling and steering are required to compare, validate and optimize dynamic behavior of vehicles. Some of these objective metrics are recommended and defined by International Organization for Standardization (ISO) and Society of Automotive Engineers (SAE), which involve data processing, statistical analysis and complex mathematical operations on acquired data through simulation or experimental testing. Due to the complexity of operations and volume of data, evaluation is often time consuming and tedious. Process automation using existing tools such as MS Excel, nCode, Siemens LMS, etc. includes several limitations and challenges, which make it cumbersome to implement. This work is about development of a centralized platform for quantification, visualization and comparison of ride, handling and steering performance metrics obtained from testing and simulation data as per relevant ISO standards. In this work ISO standards related to ride (ISO 2631-1, 2631-5, 10326), handling (ISO 4138, 7401) and steering (ISO 13674-1) are implemented and automated using built-in functions and toolboxes in MATLAB. Further, several mathematical tools and operations such as plot comparisons in…
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Development of a Measuring System for the Visualization of the Oil Film between the Piston and Cylinder Liner of a Gasoline Engine

SAE International Journal of Engines

Technical University of Munich, Germany-Julian Schäffer, Claus Kirner, Martin Härtl, Georg Wachtmeister
  • Journal Article
  • 03-13-02-0013
Published 2019-11-14 by SAE International in United States
The design of cylinder liners, pistons, and piston rings is subject to different conflicting goals. In addition to a loss-free seal of the combustion chamber, sufficient oil must be present between the friction partners. Both the reduction of piston assembly friction and the minimization of oil consumption are crucial to achieve the strictly defined CO2 and emission standards. To master this challenge and find the best compromise requires a lot of system-specific know-how. The automobile and engine manufacturers focus mainly on friction-reducing measures, which are analyzed with different measuring methods such as the floating-liner method, the strip-down method, or the instantaneous indicated mean effective pressure (IMEP) method. However, the interpretation of the results and the development of realistic simulation models lacks information about the oil film behavior and the film thickness. In order to gain this missing knowledge, instruments for oil film visualization and oil film thickness measurement have to be developed. In this study, the two-dimensional laser-induced fluorescence method (2D-LIF) is used to visualize the lubricating oil film between the piston and the cylinder…
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Camera Enables Surgeons to More Easily Identify Cancerous Tissue

  • Magazine Article
  • TBMG-35429
Published 2019-11-01 by Tech Briefs Media Group in United States

Many surgeons rely on sight and touch to find cancerous tissue during surgery. Large hospitals or cancer treatment centers may also use experimental near-infrared fluorescent agents that bind to tumors so surgeons can see them on specialized displays. These machines are costly, making them difficult for smaller hospitals to procure. They also are very large, making them difficult to fit into an operating suite and integrate smoothly into surgery, and they require the lights to be dimmed so the instruments can pick up the weak fluorescent signal, making it difficult for the surgeons to see.

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A mirrorless future? NHTSA seeks input on camera vision systems

Automotive Engineering: November/December 2019

Lindsay Brooke
  • Magazine Article
  • 19AUTP11_13
Published 2019-11-01 by SAE International in United States

The U.S. National Highway Traffic Safety Administration (NHTSA) in early October distributed a notice soliciting industry and public input on whether to allow “camera monitoring systems” to replace rear- and sideview exterior mirrors mandated since 1968 in U.S. auto safety standards. The agency said in a notice in the online Federal Register that it is seeking outside research and data about the potential safety impacts of replacing conventional fixed mirrors with camera-based vision systems. The action is one step in the process to inform a potential proposal to alter the mirror requirement for future production vehicles sold in the U.S.

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Tiny Lensless Endoscope Captures 3D Images of Objects Smaller Than a Cell

  • Magazine Article
  • TBMG-35476
Published 2019-11-01 by Tech Briefs Media Group in United States

Researchers have developed a new self-calibrating endoscope that produces 3D images of objects smaller than a single cell without a lens or any optical, electrical, or mechanical components. The tip of the endoscope measures just 200 microns across — about the width of a few human hairs twisted together. As a minimally invasive tool for imaging features inside living tissues, the extremely thin endoscope could enable a variety of research and medical applications.

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Recovering Color Images from Scattered Light

  • Magazine Article
  • TBMG-35478
Published 2019-11-01 by Tech Briefs Media Group in United States

Engineers at Duke University have developed a method for extracting a color image from a single exposure of light scattered through a mostly opaque material. The technique has applications in a wide range of fields from healthcare to astronomy.

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Diamond Technology Enables Low-Cost Medical Imaging

  • Magazine Article
  • TBMG-35435
Published 2019-11-01 by Tech Briefs Media Group in United States

Magnetic resonance imaging (MRI) machines are employed to locate cancerous tumors and aid in the development of treatment plans, while nuclear magnetic resonance (NMR) machines are used to examine the atomic-scale structure and chemistry of drug compounds and other molecules. Diamonds are the key to a technique that could provide a very-low-cost alternative to these expensive medical imaging and drug discovery devices.

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Facial Recognition Technology Works in the Dark

  • Magazine Article
  • TBMG-35441
Published 2019-11-01 by Tech Briefs Media Group in United States

Thermal cameras like forward looking infrared (FLIR) sensors are actively deployed on aerial and ground vehicles, in watch towers, and at check points for surveillance purposes. More recently, thermal cameras have become available for use as body-worn cameras. The ability to perform automatic face recognition at night using such thermal cameras is beneficial for informing a soldier that an individual is someone of interest, like someone who may be on a watch list.

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Optical Neural Network Could Lead to Intelligent Cameras

  • Magazine Article
  • TBMG-35479
Published 2019-11-01 by Tech Briefs Media Group in United States

UCLA engineers have made major improvements on their design of an optical neural network — a device inspired by how the human brain works — that can identify objects or process information at the speed of light. The development could lead to intelligent camera systems that figure out what they are seeing simply by the patterns of light that run through a 3D engineered material structure. The new design takes advantage of the parallelization and scalability of optical-based computational systems.