8,619 research outputs found
Wind loads analysis at the anchorages of the Talavera de la Reina cable stayed bridge
No full textThis paper describes wind tunnel tests performed on wind tunnel models of the Talavera de la Reina cable stayed bridge. The work describes the aeroelastic model construction and it is focused on the evaluation and analysis of the mean and peak wind loads at the tower foundation and the cable anchorages since these data can be very useful by the bridge manufacturer as a support for the bridge design. The work is part of a complete wind tunnel study carried out to analyze the aeroelastic stability of the bridge
Concepción de Miramón redacta carta para la Reina
No full textConcepción de Miramón no había tenido oportunidad de redactar la carta para la Reina ni la Duquesa, por la mala salud de su hijo Miguel, que se encuentra en México.
Le informa que el profesor Venanzi le conseguirá el permiso para hacer las fotografías.
Le advierte que la carta para la Reina se la tiene que dar sellada.</p
Reina Courts
No full textReina Courts -- two men standing in fronthttps://digitalcommons.acu.edu/coc_missions_photos/1291/thumbnail.jp
Reina, Casiodoro de
No full textVoce biografica di Casiodoro de Reina teologo e riformatore spagnolo (1520-1594ca)
Sommerfeld's way to the Thomas precession
No full textSommerfeld's 1931 presentation of his derivation of the Thomas precession is set in its historical context. Some aspects of his particular geometrical approach are also discussed
Quantum spin coverings and statistics
No full textSL_q(2) at odd roots of unity q^l =1 is studied as a quantum cover of the complex rotation group SO(3,C), in terms of the associated Hopf algebras of (quantum) polynomial functions. We work out the irreducible corepresentations, the decomposition of their tensor products and a coquasitriangular structure, with the associated braiding (or statistics). As an example, the case l=3 is discussed in detail
The FLEXnav Precision Dead-reckoning Systems
No full textResearch at the University of Michigan’s Mobile Robotics Lab aims at the devel¬opment of an accurate proprioceptive (i.e., without external references) position estimation (PPE) system for planetary rovers. Much like other PPE systems, ours uses an inertial measurement unit (IMU) comprising three fiber-optic gyroscopes and a two-axes accelerometer, as well as odometry based on wheel encoders.
Our PPE system, however, is unique in that it does not use the conventional Kalman Filter ap-proach for fusing data from the different sensor modalities. Rather, our system combines data based on expert rules that implement our in-depth understanding of each sensor modality’s be-havior under different driving and environmental conditions. Since our system also uses Fuzzy Logic operations in conjunction with the Expert Rules for finer gradation, we call it Fuzzy Logic Expert navigation (FLEXnav) PPE system.
The paper presents detailed experimental results obtained with our FLEXnav system integrated with our planetary rover clone “Fluffy” and operating in a Mars-like environment. In addition, we compare the results of our FLEXnav system with results obtained from a conventional Kalman Filter. The paper also introduces new methods for wheel slippage detection and correc-tion, along with comprehensive experimental results
Current-based Slippage Detection and Correction for Mobile Robots and Planetary Rovers
No full textThis paper introduces a novel method for wheel slippage detection and correction based on motor current measurements. Our proposed method estimates wheel slippage from motor current measurements and adjusts encoder readings affected by wheel slippage accordingly. The correction of wheel slippage based on motor currents works only in the direction of motion, but not laterally, and it requires some knowledge of the terrain. However, this knowledge does not have to be provided ahead of time by human operators. Rather we propose three tuning techniques for determining relevant terrain parameters automatically, in real time, and during motion over unknown terrain. Two of the tuning techniques require position ground truth (i.e., GPS) to be available either continuously or sporadi-cally. The third technique does not require any position ground truth, but is less accurate than the two other methods. A comprehensive set of experimental results have been included to validate this approac
Maguindanao province (Philippines), Reina Regente Hills south of Pulangi river
No full textAugust 31, 1933. Dulauan [Datu Piang]-Ft. Pikit, Cotabato Prov [Maguindanao province]. Reina Regente Hill [Reina Regente Hills] south of river, 1 hour above Dulauan [Datu Piang]. F.4 1/300.Autonomous Region in Muslim Mindanao.GrayscalePendleton nitrate negative, Box 66 of 38
Otras mitologías (Other Mythologies) and Catch and Release , Book Presentation by Author Reina María Rodríguez
No full textThis flyer promotes the event Otras mitologías (Other Mythologies) and Catch and Release : Book Presentation by Author Reina María Rodríguez cosponsored by the School of International and Public Affairs and the Department of Modern Languages and Florida International University. The event was held and Books & Books in Coral Gables.https://digitalcommons.fiu.edu/cri_events/1019/thumbnail.jp
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