Results 251 to 260 of about 246,593 (310)
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Flight-induced compass representation in the monarch butterfly heading network.

Current Biology, 2021
For navigation, animals use a robust internal compass. Compass navigation is crucial for long-distance migrating animals like monarch butterflies, which use the sun to navigate over 4,000 km to their overwintering sites every fall. Sun-compass neurons of
M. Beetz   +8 more
semanticscholar   +1 more source

Redefined Output Model-Free Adaptive Control Method and Unmanned Surface Vehicle Heading Control

IEEE Journal of Oceanic Engineering, 2020
Based on the model-free adaptive control (MFAC) theory, the heading control problem of an unmanned surface vehicle (USV) with uncertainties is researched.
Yu-lei Liao   +3 more
semanticscholar   +1 more source

Regression analysis of experimental data for added resistance in waves of arbitrary heading and development of a semi-empirical formula

Ocean Engineering, 2020
In this paper, we first conduct an extensive review of published experimental studies on the added resistance of a ship in waves to establish a common database. The data was enhanced by unpublished data from joint industry projects.
Shukui Liu, A. Papanikolaou
semanticscholar   +1 more source

Method and Implementation of a Bioinspired Polarization-Based Attitude and Heading Reference System by Integration of Polarization Compass and Inertial Sensors

IEEE transactions on industrial electronics (1982. Print), 2020
How to self-determine the attitude and heading of users is a challenging issue in unknown, global navigation satellite system (GNSS) denied, or magnetic disturbance environments.
Jian Yang   +4 more
semanticscholar   +1 more source

Head to head polymers. XXV: Properties of head to head polyisobutylene

Polymer Engineering & Science, 1983
AbstractHead‐to‐head polyisobutylene, prepared by the Grignard coupling reaction of 2,2,3,3‐tetramethyl‐1,4‐dibromobutane had molecular weight of 3,000 to 10,000 and was characterized by wide angle x‐ray diffraction, optical microscopy and thermal behavior.
Michael Malanga, Otto Vogl
openaire   +1 more source

Heading and Head Injuries in Soccer

Sports Medicine, 2001
In the world of sports, soccer is unique because of the purposeful use of the unprotected head for controlling and advancing the ball. This skill obviously places the player at risk of head injury and the game does carry some risk. Head injury can be a result of contact of the head with another head (or other body parts), ground, goal post, other ...
D T, Kirkendall   +2 more
openaire   +2 more sources

A Multi-regional Network Encoding Heading and Steering Maneuvers in Drosophila.

Neuron, 2020
An internal sense of heading direction is computed from various cues, including steering maneuvers of the animal. Although neurons encoding heading and steering have been found in multiple brain regions, it is unclear whether and how they are organized ...
Hiroshi M. Shiozaki   +2 more
semanticscholar   +1 more source

Respirable dust pollution characteristics within an underground heading face driven with continuous miner – A CFD modelling approach

Journal of Cleaner Production, 2019
Respirable dust pollution at an underground heading face driven with continuous miner was detected during a ventilation survey. In order to obtain fundamental understandings of the airflow patterns and the respirable dust dispersion characteristics ...
Zhongwei Wang   +5 more
semanticscholar   +1 more source

Head‐to‐head polymers 27: Thermal degradation of head‐to‐head polyisobutylene

Polymer Engineering & Science, 1983
AbstractHead‐to‐head polyisobutylene degrades at a maximum rate at 320°C, a temperature about 65°C lower than head‐to‐tail polyisobutylene. Under our conditions, head‐to‐tail (the regular polyisobutylene) degrades (as do many other disubstituted vinyl monomers) to a high yield of the monomer isobutylene.
M. Malanga, F. Xi, O. Vogl
openaire   +1 more source

Global analysis of CCT family knockout mutants identifies four genes involved in regulating heading date in rice.

Journal of Integrative Plant Biology, 2020
Many genes encoding CCT domain-containing proteins regulate flowering time. In rice (Oryza sativa), 41 such genes have been identified, but only a few have been shown to regulate heading date.
Jia Zhang   +6 more
semanticscholar   +1 more source

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