40,929 research outputs found

    \u3ci\u3eTrimerotropis Huroniana\u3c/i\u3e (Orthoptera: Acrididae), a New Record for Wisconsin

    Get PDF
    (excerpt) Trimerotropis huroniana Walker (Subfamily Oedipodinae), is a distinctive species first described by Walker (1902) from a small area of open dunes near Southampton, Ontario. Studies by Cantrall (1968), Hubbell (1929) and Otte (1984) have suggested that T. huroniana is endemic to the sand dune communities of the northern Great Lakes region

    First Report of \u3ci\u3eAllonemobius Griseus\u3c/i\u3e and \u3ci\u3ePsinidia Fenestralis\u3c/i\u3e in Ohio (Orthoptera: Gryllidae and Acrididae)

    Get PDF
    Occurrences of Allonemobius griseus and Psinidia fenestralis in Ohio are pub- lished for the first time. Apparent restriction of these species to the sand deposits of northwestern Ohio, their localized distribution in scattered, non-contiguous blow- outs, and habitat loss presently occurring from residential and commercial development nearby, are justifications provided for the formal state listing and conservation of these Orthoptera in Ohio

    Artificial intelligence applications in space and SDI: A survey

    Get PDF
    The purpose of this paper is to survey existing and planned Artificial Intelligence (AI) applications to show that they are sufficiently advanced for 32 percent of all space applications and SDI (Space Defense Initiative) software to be AI-based software. To best define the needs that AI can fill in space and SDI programs, this paper enumerates primary areas of research and lists generic application areas. Current and planned NASA and military space projects in AI will be reviewed. This review will be largely in the selected area of expert systems. Finally, direct applications of AI to SDI will be treated. The conclusion covers the importance of AI to space and SDI applications, and conversely, their importance to AI

    SDI satellite autonomy using AI and Ada

    Get PDF
    The use of Artificial Intelligence (AI) and the programming language Ada to help a satellite recover from selected failures that could lead to mission failure are described. An unmanned satellite will have a separate AI subsystem running in parallel with the normal satellite subsystems. A satellite monitoring subsystem (SMS), under the control of a blackboard system, will continuously monitor selected satellite subsystems to become alert to any actual or potential problems. In the case of loss of communications with the earth or the home base, the satellite will go into a survival mode to reestablish communications with the earth. The use of an AI subsystem in this manner would have avoided the tragic loss of the two recent Soviet probes that were sent to investigate the planet Mars and its moons. The blackboard system works in conjunction with an SMS and a reconfiguration control subsystem (RCS). It can be shown to be an effective way for one central control subsystem to monitor and coordinate the activities and loads of many interacting subsystems that may or may not contain redundant and/or fault-tolerant elements. The blackboard system will be coded in Ada using tools such as the ABLE development system and the Ada Production system

    Flexible drive allows blind machining and welding in hard-to-reach areas

    Get PDF
    Flexible power and control unit performs welding and machining operations in confined areas. A machine/weld head is connected to the unit by a flexible transmission shaft, and a locking- indexing collar is incorporated onto the head to allow it to be placed and held in position
    corecore