Abstract: Systems and methods for use in training observers and search and rescue personnel in detecting and identifying visual cues related to potential threats to aircraft and to ground based search and rescue circumstances. A visual display displays a scene generated by a visual scene generator apparatus. A vision limiting device is placed between the trainee and the visual display and the trainee can only see a limited amount of the visual display through a window on the vision limiting device. The limited view of the scene afforded the trainee will force the trainee to move around at various angles to see more of the scene as he normally would in real life.

Abstract: Methods and devices for use in gathering and analyzing data from a corpus of documents. A corpus of documents is initially scanned for words that qualify as entities according to user defined criteria. Multiple counters track the number of documents which mention specific entities. A database of entities mentioned in the documents is maintained and an entry for each entity in the corpus is placed in the entity database. The results are then presented to a user in a spiral form with the most important entity at the center of the spiral. The importance of an entity may be determined by either how many entities it is connected to or how many documents mention that entity. A connection exists between two entities if they are both mentioned in at least one document and the more documents mention two specific entities at the same time, the stronger the connection between those two specific entities.

Abstract: Polymerization of &agr;-bromomethyl-&agr;-methyl-&bgr;-propiolactone (BMMPL) or &agr;-chloromethyl-&agr;-methyl-&bgr;-propiolactone (CMMPL) yielded thermoplastic homopolymers that upon azidation led to a novel energetic thermoplastic polyester: poly(&agr;-azidomethyl-&agr;-methyl-&bgr;-propiolactone) (PAMMPL). An energetic copolyether-ester thermoplastic elastomer was prepared by using glycidyl azide polymer, a dihydroxyl terminated energetic polymer, as a macroinitiator for the polymerization of BMMPL or CMMPL. The azidation of the resulting copolyether-ester yielded an energetic thermoplastic elastomer that melted at between 80° C. and 85° C. Polymerization of &agr;-dibromomethyl-&bgr;-propiolactone (DBMPL) resulted in a polymer which upon azidation yielded a new energetic polymer that can be used as a binder or into an energetic thermoplastic elastomer synthesis.

Abstract: A broadband non-resonant microwave frequency halver which simultaneously decouples the input frequency from the output port through phase cancellation and couples the subharmonic frequency to the output port through phase addition providing good isolation between input and output over a very broad frequency range. The implementation of this circuit specifically excludes resonant, or frequency dependent elements and therefore has a much broader band of operation than previous circuits which relied on resonant phenomena.

Abstract: This invention relates to organic dye compositions of improved mechanical properties and to a method of coating the dye with an inert coating material which enables the production of pour-castable colored smoke-producing compositions of high solids loading, particularly when a red dye e.g. Disperse Red 9, is employed.