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Abstract Conventional impact sensitiveness machines (e.g. Rotter and BAM) do not provide detailed information about hot‐spot ignition mechanisms in energetic materials. To gain further insight, a glass anvil technique was developed at Cambridge in the early 1950s, which allowed high‐speed photographic studies to be performed during impact on energetic liquids, explosive powders and crystals. Herein we review such investigations which continue up to the present day.

Equine Veterinary JournalVolume 45, Issue 3 p. 267-268 EDITORIAL Professionalism, public opinion and placebos D. Mills, D. Mills School of Life Sciences, University of Lincoln, UK Dstl, Fort Halstead, UKSearch for more papers by this authorN. Cracknell, N. Cracknell School of Life Sciences, University of Lincoln, UK Dstl, Fort Halstead, UKSearch for more papers by this author D. Mills, D. Mills School of Life Sciences, University of Lincoln, UK Dstl, Fort Halstead, UKSearch for more papers by this authorN. Cracknell, N. Cracknell School of Life Sciences, University of Lincoln, UK Dstl, Fort Halstead, UKSearch for more papers by this author First published: 09 April 2013 https://doi.org/10.1111/evj.12076Citations: 1Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL No abstract is available for this article.Citing Literature Volume45, Issue3May 2013Pages 267-268 RelatedInformation

ACCESSORIOULNAR (AU) arthrodesis (AU-AD) has been reported in dogs only once in the literature, to address accessory carpal bone (ACB) subluxation (Lenehan and Tarvin 1989). It is an infrequently performed procedure in British veterinary clinics. A request for such cases was made directly to 121 British veterinary surgeons accepting orthopaedic referrals and also published in Veterinary Record (Bush 2010); this generated five cases, although only three had sufficient clinical notes and radiographs to allow inclusion in the present report. A detailed knowledge of carpal anatomy (Mikic and others 1992, Guilliard 2001) is crucial for the evaluation of carpal injuries and for surgical reconstruction. Due to the lack of published reports detailing feline carpal ligamentous anatomy, an assumption is made that the ligamentous structures of the ACB in cats are analogous to those of the dog (Voss and others 2003, Calvo and others 2009) (Fig 1). Fig 1 Schematic diagram of the lateral aspect of the carpus in the dog, showing the principal ligaments of the accessory carpal bone. The accessorioradial ligament originates from the radius and inserts on the medial proximobasilar aspect of the accessory carpal bone (ACB). The accessorioulnar ligament originates from the ulna and inserts on the lateral proximobasilar aspect of the ACB. The accessorioulnar carpal ligament (AU-CL) originates from the lateral distobasilar aspect of the ACB and inserts on the lateral aspect of the ulnar carpal bone (UCB). The accessorioquartile ligament lies medial to this with a small insertion on the UCB but its main insertion on the fourth numbered carpal bone. On the apical (palmar) aspect of the ACB, the flexor carpi ulnaris inserts proximally. The accessoriometacarpal ligaments IV and V (AMCL IV/V) originate from the distoapical border of the ACB and insert at the heads of metacarpals IV and V, respectively. The palmar retinaculum …

An autonomous, compact and repetitive pulsed power generator has recently been developed at Loughborough University for use in low-energy, general-purpose experimentation, in either indoor or inclement outdoor environments. Flexibility, reliability and safety were the most important design requirements, which were achieved through the use of interchangeable components, off the shelf units and the development of a fibre-optic controlled charging and triggering system that allows the complete system to run from a single battery source. The present arrangement is based on a General Atomics 1 µF capacitor although many GAEP S/SS and SE/SSE series capacitors are compatible. A Trigatron discharges the capacitor into a transmission line with series connected mounting bays designed to accommodate a range of resistors or inductors if required. A high-voltage coaxial cable connects the generator to an external load or a further pulsed power system. Current and voltage are internally monitored using a Pearson current transformer and a Tektronix high-voltage probe. The completed system is housed in a weatherproof metallic container and mounted on rubber wheels. To date it has been operated successfully on more than 100 occasions, both in the laboratory and in various outdoor conditions.

A modern approach to an established technique is investigated for the electronic control of polarisation of microstrip patch antennas. The control is achieved by placing micro-electromechanical switches (MEMS) at appropriate locations in a patch antenna. The microwave MEMS are used to switch between open and short circuit conditions that allow reconfiguration of the modal fields. Changing the number and location of short circuit field regions changes the radiated field polarisation from linear horizontal to vertical, right hand circular or left hand polarisation. All of the polarisation states are obtained without changing the frequency of operation, input impedance or radiation pattern of the patch antenna. The antenna is fed with a single external feed network.

High-efficiency simple, compact and robust opening switches capable of generating hundreds of kV are key elements in the development of autonomous explosivelydriven pulsed power sources. The paper presents results of the first phase of development of such an opening switch, based on exploding wire technology. By implementing a matched inductor in the circuit and optimising the wire parameters, a very compact and robust device is capable of generating reproducibly 240 kV. Full details of the system are given together with experimental data and theoretical predictions.