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Custom Optical Mounts

Optical Surfaces Ltd. (Kenley, UK) specializes in providing custom modified versions of its high-precision optical mounts for challenging applications. Typical custom modifications include mounts for non-circular optical components and for supporting larger diameter optics (<600mm). Various motorized mount options are also available to suit applications in hostile environments (under vacuum, elevated temperature, high pressure) or where limited space makes manual adjustment difficult. As an option to the standard 2-axis gimbal micrometer-driven action, Optical Surfaces mounts can be fitted with x-y-z linear stages if required. Constructed in black anodized aluminum — OS mounts provide a secure and stable platform for optical components with diameters from 100mm to 550mm. www.optisurf.com/index.php/products/product-6/custom-mounts

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Magnetics Design: Specification, Performance & Economics

An informative white paper from Datatronics Romoland, Inc., provides a discussion of the design, development and delivery of affordable magnetic components. The design development process begins once performance requirements are specified. Upon design approval, the procurement of materials for a prototype build is initiated. During this stage, specifications are not final and options remain open for cost-effective production. Specifications must be reviewed and design trade-offs evaluated to ensure that the technical requirements are economically attainable with consideration given to performance and tolerance in relation to affordable cost.

Posted in: Electronics & Computers, White Papers

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Alleviating Memory and Cache Contention in Safety-Critical Applications

In safety-critical systems, the ability to guarantee that safety-critical tasks have sufficient time to execute is key for system integrity and safe operation. A big challenge facing developers of safety-critical software applications is managing the shared resources of memory and cache to minimize worst case execution times (WCET). On-chip cache allows the processor to run at on-chip memory bus speeds and increases overall compute power when executing from the cache. However, task switching and competition among multiple cores can degrade cache performance and have dramatic impacts on WCET. Benchmarks demonstrate that WCET can be 3 times higher than average-case execution time (ACET) on single-core processors, up to an order of magnitude higher or more on multicore processors.

Posted in: Aerospace, Aviation, Defense, Articles, DTB

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Next-Generation Mobile Tactical Communications

After many years of development and well-publicized budget overruns, the DoD’s Joint Tactical Radio System program (since reorganized and renamed) has recently given birth to a set of handheld voice and data radios — so-called Rifleman radios — built by a number of traditional military radio firms, including Exelis, GD, Harris, and Thales.

Posted in: Communications, Aerospace, Defense, Articles, DTB

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Commercial Programs Are Flying High

With economic regeneration underway this year, the rate of ordering new aircraft has been at an all-time high, with the result that backlogs for undelivered new production stretch well into the next decade for some popular models. by Richard Gardner Boeing and Airbus can hardly keep up with demand for 150-seat jets, and both have increased their own monthly production rates to well over 40 aircraft, stretching the capacity of the supply chain to the limit.

Posted in: Aerospace, Aviation, Defense, Articles, DTB

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3-D Manufacturing of Titanium Components Takes Off

MRO providers are discovering ways to innovate their procedures while remaining viable and profitable through the current downturn in government spending. With such challenges as base closings, shrinking defense budgets, and sequestration, the worldwide maintenance, repair, and overhaul (MRO) sector is projected to experience a significant decline over the next few years.

Posted in: Aerospace, Defense, Articles, DTB

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New Technique Could Make Sub-Wavelength Images at Radio Frequencies

Imaging and mapping of electric fields at radio frequencies (RF) currently requires the use of metallic structures such as dipoles, probes, and reference antennas. To make such measurements efficiently, the size of these structures needs to be on the order of the wavelength of the RF fields to be mapped. This poses practical limitations on the smallest features that can be measured.

Posted in: Aerospace, RF & Microwave Electronics, Defense, Articles, DTB

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