1,528 research outputs found

    Domain general learning: Infants use social and non-social cues when learning object statistics.

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    Previous research has shown that infants can learn from social cues. But is a social cue more effective at directing learning than a non-social cue? This study investigated whether 9-month-old infants (N = 55) could learn a visual statistical regularity in the presence of a distracting visual sequence when attention was directed by either a social cue (a person) or a non-social cue (a rectangle). The results show that both social and non-social cues can guide infants' attention to a visual shape sequence (and away from a distracting sequence). The social cue more effectively directed attention than the non-social cue during the familiarization phase, but the social cue did not result in significantly stronger learning than the non-social cue. The findings suggest that domain general attention mechanisms allow for the comparable learning seen in both conditions

    X-29A aircraft structural loads flight testing

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    The X-29A research and technology demonstrator aircraft has completed a highly successful multiphase flight test program. The primary research objective was to safely explore, evaluate, and validate a number of aerodynamic, structural, and flight control technologies, all highly integrated into the vehicle design. Most of these advanced technologies, particularly the forward-swept-wing platform, had a major impact on the structural design. Throughout the flight test program, structural loads clearance was an ongoing activity to provide a safe maneuvering envelope sufficient to accomplish the research objectives. An overview is presented of the technologies, flight test approach, key results, and lessons learned from the structural flight loads perspective. The overall design methodology was considered validated, but a number of structural load characteristics were either not adequately predicted or totally unanticipated prior to flight test. While conventional flight testing techniques were adequate to insure flight safety, advanced analysis tools played a key role in understanding some of the structural load characteristics, and in maximizing flight test productivity

    Technical And Economic Feasibility Study Of Utility-Scale Solar Photovoltaic And Energy Storage Systems At Illinois State University

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    Solar energy has come a long way since the turn of the century and has been proven to be a useful source of renewable energy from both an environmental, economic and educational standpoint. The advancement of energy storage technology has opened more doors to the capabilities of production for these systems. This study shows expected outcomes of potential locations on Illinois State University’s (ISU) campus. While there have been several studies conducted on solar photovoltaic (PV) systems on campus none have analyzed the implementation of energy storage. We will use Google Earth Pro and Helioscope to conduct site analysis for a majority of the locations within campus for optimal placement of PV array systems. System Advisory Model will provide financial estimates and energy analysis that will cover the data collected through other tools. These methods give feedback and forecasts to the University. This study seeks to provide information as to how a combination of the two systems can lower demand during high demand hours ISU.https://ir.library.illinoisstate.edu/urs2021tec/1007/thumbnail.jp

    A First Look at the Microbial Community of Rabidosa rabida, a Wolf Spider in Searcy, Arkansas

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    Many diverse animal models have been used to explore the interactions between host organisms and their microbiota. Increased understanding of microbe-host interactions could lead to improved healthcare and drug development. Spiders have venom, digestive fluid, and body fluid components that have been suggested to possess antimicrobial properties that could lead to new and interesting host-microbe interactions. While studies have been published on interactions between bacteria affecting the immune function and behavior of spiders, the spider microbiome has not been established to date. Excreta and body swabs were collected from Rabidosa rabida, a wolf spider typically found on tall grass or low vegetation. Bacteria were cultured on tryptic soy agar, an all-purpose media known to grow most common bacterial strains, plates and 53 bacterial samples were Gram stained, catalase, and coagulase tested using aseptic technique. Staphylococcus aureus, Staphylococcus sp., and a Gram-positive bacillus were found on the excreta samples while Staphylococcus sp., Gram-negative bacilli, and Gram-negative cocci were found on the body swabs. Most of the excreta samples had little to no growth. The body swabs had multiple types of microorganisms that were limited to body location. A better understanding of this relatively simple host-microbe interaction can provide an understanding of the factors affecting these interactions allowing us to then understand more complex interactions such as those found in humans

    Multi-Axis Machining Project Development

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    Multi-axis milling is a manufacturing material removal process in which computer numerically controlled (CNC) tools cut away excess material through movement in four or more axes. Compared to traditional three-axis machining, multi-axis machining greatly increases the capability and accuracy of the CNC machining processes by reducing the amount of operations required to completely machine a part. Currently, the Industrial and Manufacturing Engineering Department at Cal Poly lacks an advanced CNC class that incorporates fourth and fifth axis CNC machining in the curriculum. This report describes the process behind creating a project for such a class. The class will demonstrate the increased capability of multi-axis machining through a multi-axis positioning machining project. To create the project for the class, a demo part was designed on SolidWorks to be machined on a multi-axis CNC mill. The part required initial operations to create a machining blank and workholding for the multi-axis mill, so these items were developed prior to the fabrication of the part. Each operation required a computer-aided design, computer-aided manufacturing, post-processing files, and engineering documentation. The project resulted in a multi-sided demonstration part that reflects the increased capabilities of fourth and fifth axis machining to be used in a class project in Cal Poly’s IME 336 Computer Aided Manufacturing II course

    Optimizing a Passive Tracking Solar Panel System

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    For a solar panel to function efficiently, it must turn to face the sun throughout the day. Usually, an electronic device rotates a solar panel. In this experiment, hourly rotation of the panel was achieved through contraction of a shape memory alloy (SMA) and a gear system. A Fresnel lens directed the sun\u27s rays onto the SMA causing it to contract. A delayed reset system was built to turn the panel from west to east at the end of the day. In addition, this project investigated different materials to properly heat and cool the SMA within the plexiglass housing apparatus. The overall goal for the project was to automatically power an appliance on campus with solar energy

    CMS Pixel Telescope Addition to T-980 Bent Crystal Collimation Experiment at the Tevatron

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    An enhancement to the T-980 bent crystal collimation experiment at the Tevatron has been completed. The enhancement was the installation of a pixel telescope inside the vacuum-sealed beam pipe of the Tevatron. The telescope is comprised of six CMS PSI46 pixel plaquettes, arranged as three stations of horizontal and vertical planes, with the CAPTAN system for data acquisition and control. The purpose of the pixel telescope is to measure beam profiles produced by bent crystals under various conditions. The telescope electronics inside the beam pipe initially were not adequately shielded from the image current of the passing beams. A new shielding approach was devised and installed, which resolved the problem. The noise issues encountered and the mitigating techniques are presented herein, as well as some preliminary results from the telescope.Comment: 9 pp. 2nd International Conference on Technology and Instrumentation in Particle Physics 2011: TIPP 2011. 9-14 Jun 2011. Chicago, Illinoi

    Attitude Control Systems

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    Attitude control systems play an integral role in many modern technologies. This project develops and inspects an autonomous attitude control system for an underwater vehicle. Throughout the project, an understanding of the fundamentals of attitude control and an appreciation for the complexity involved in a relatively simple, yet comprehensive, operational system were achieved. More specifically, the mathematic expressions, computer programs, and physical variables and components, along with the interactions between elements of the system, were extensively studied
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