Topic
Shields
About: Shields is a research topic. Over the lifetime, 1456 publications have been published within this topic receiving 10896 citations.
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Patent•
28 Aug 2000
TL;DR: In this paper, the upper and lower vacuum tubes are made of materials with high electric resistance, and a vertical slit 41 is located at the connective tube 23 connecting the thermal shields 8 so as to prevent the eddy current from flowing.
Abstract: PROBLEM TO BE SOLVED: To reduce asymmetry of eddy current caused by a connecting section in a superconductive magnet device in which upper and lower vacuum tubes are connected by a connecting tube. SOLUTION: The upper and lower vacuum tubes 9 and the connecting tube 24 connecting the vacuum tubes are made of materials with high electric resistance. A magnetic flux generated by a gradient magnet field coil is allowed to reach a pair of upper and lower secondary thermal shields 8 and a connective tube 23 that connects the upper and lower secondary thermal shields 8. A vertical slit 41 is located at the connective tube 23 connecting the upper and lower secondary thermal shields 8 so as to prevent the eddy current from flowing. As a result, the asymmetry of the eddy current occurring at the section of the connective tube 23 is reduced.
2 citations
TL;DR: In this article , a personal protection equipment (PPE) was designed and 3D printed utilizing three types of polylactic acid (PLA) as a base material, and the morphology and surface elemental analyses of sectioned samples were analyzed by scanning electron microscopy (SEM) and energy dispersion x-ray spectroscopy (EDS).
2 citations
Patent•
02 Mar 1992
TL;DR: In this article, a stationary induction electrical apparatus is formed in a series of a plurality of magnetic shields 15 arranged in the width direction of a core yoke section 3 in a divided state.
Abstract: PURPOSE:To prevent the functional drop of a plurality of magnetic shields by arranging the shields in the width direction of a core yoke section in a divided state and ducts between each adjacent magnetic shields and providing horizontal ducts between the magnetic shields and a supporting fixture and between the magnetic shields and an insulating plate, and then, making the ducts to be communicated with coolant paths. CONSTITUTION:This stationary inductance electrical apparatus is formed in a series of a plurality of magnetic shields 15 arranged in the width direction of a core yoke section 3 in a divided state. Then coolant paths are formed around the magnetic shields by respectively providing horizontal ducts 16 and 17 between the shields 15 and a supporting fixture 4 and between the shields 15 and an insulating plate 10 and ducts 19 and 20 between each adjacent shields 15 and between the shields 15 and a preventive plate B. Therefore, a stationary induction electrical apparatus which is sharply increased in the degree of freedom in design, reduced in loss caused by leakage magnetic flux, and free from local heating can be obtained, because the coolant paths can be secured even when no special path holes are provided through the magnetic shields. In addition the cooling performance of the winding 6 of the apparatus is excellent and the performance drop of the magnetic shields 15 can be prevented.
2 citations
01 May 1994
2 citations
TL;DR: Transparent TSE eye shields are able to reduce the dose to the eyes while maintaining vision during treatment at a reasonable cost and were well tolerated by patients, and there were no reports of any incidents or adverse events.
Abstract: Abstract Purpose For total skin electron (TSE) beam radiation therapy, the anterior eye and conjunctiva can be protected with eye shields to prevent keratitis, xerophthalmia, and cataractogenesis. Conventional metal eye shields can reduce patient balance by obscuring vision and thus increasing the risk for falls. We report on the design, fabrication, and clinical use of transparent acrylic eye shields for TSE. Methods The primary design goals were a seven‐fold reduction in the dose to the anterior eye and conjunctiva to meet published dose‐recommendations, preservation of vision for the wearer, and biocompatibility for external use. Resembling thick swim goggles, the design features 23 mm thick acrylic lenses that are mounted in a 3‐D printed support structure that conforms to the eye socket and can be worn with a strap. Dose measurements were performed in a simulated Stanford‐technique treatment with an anthropomorphic phantom using Gafchromic EBT film Results The transparent eye shields were manufactured using a 3D‐printer and CNC‐machine. Based on measurements from the simulated treatments for each of the eye shields, the eye shields provided a 12‐fold reduction in dose to the lens. After use in more than 200 fractions, the shields were well tolerated by patients, and there were no reports of any incidents or adverse events. Conclusion Transparent TSE eye shields are able to reduce the dose to the eyes while maintaining vision during treatment at a reasonable cost.
2 citations