Results 41 to 50 of about 1,915,001 (190)

Inequivalent Quantizations of Gauge Theories

open access: yes, 1999
It is known that the quantization of a system defined on a topologically non-trivial configuration space is ambiguous in that many inequivalent quantum systems are possible.
Arms J. M.   +2 more
core   +1 more source

Structural Antennas for 3cm Radar Onboard Multi-Rotor UAV [PDF]

open access: yes, 2017
A series of 3cm amateur band radar antennas suitable for installation on a cinematic grade multi-rotor UAV were considered. A wideband open waveguide mouth antenna was developed that can be made from the existing arms of a multi-rotor UAV without any ...
Gray, D., Le Kernec, J.
core   +1 more source

Unveiling the anticorrosion potential of MXenes heterostructures via chloride-ion barrier effect: A first-principles study

open access: yesMaterials & Design
Electrochemcial/Chemical corrosion to metallic materials can significantly accelerate structural failure, shorten service life, and reduce durability of equipment, thus causing enormous economic losses and significant safety risks to marine economy and ...
Xiang Xiao   +5 more
doaj   +1 more source

Improved Correlation Filter Tracking with Enhanced Features and Adaptive Kalman Filter

open access: yesSensors, 2019
In the field of visual tracking, discriminative correlation filter (DCF)-based trackers have made remarkable achievements with their high computational efficiency.
Hao Yang, Yingqing Huang, Zhihong Xie
doaj   +1 more source

Arm reconstruction

open access: yesAnnales de Chirurgie Plastique Esthétique, 2020
The arm is less often concerned by reconstructive surgeries than more distal parts of the upper extremity. However, when affected, the arm is frequently part of complex mutilating injuries involving composite defects. For a given traumatic or oncologic defect, there are several reconstructive options and choosing the right sequence may pose a challenge
M. Witters   +8 more
openaire   +3 more sources

The relationships between explosive power for arms and legs and some biokinematic variables for team handball players [PDF]

open access: yesمجلة الرافدين للعلوم الرياضية, 2007
Explosive power one of the most important physical element fitness in team handball, there are two basic important factors which are very effective in shooting these factor are explosive power for arms and legs and throwing velocity.
Mohammed .Khleel
doaj   +1 more source

Gas Dynamics in the Milky Way: Second Pattern Speed and Large-Scale Morphology [PDF]

open access: yes, 2002
We present new gas flow models for the Milky Way inside the solar circle. To this end we use SPH simulations in gravitational potentials determined from the NIR luminosity distribution (including spiral arms) which are based on the COBE/DIRBE maps.
Bissantz, Nicolai   +2 more
core   +3 more sources

THE PERSONALITY OF THE GENERAL A.N. KUROPATKIN IN THE BRITISH PRESS DURING THE RUSSO-JAPANESE WAR (1904-1905)

open access: yesВестник Брянского государственного университета, 2023
The article analyzes the process of formation of the image of the commander-in-chief of the Russian army in Manchuria General A.N. Kuropatkin in the British public during the Russo-Japanese War of 1904 - 1905 on the example of periodicals of Great ...
Arbekov A.B.
doaj   +1 more source

Constant lift rotor for a heavier than air craft [PDF]

open access: yes, 1979
A rotor blade extended radially from a hub, characterized by an elongated spar and a plurality of axially aligned shells pivotally mounted on the spar is presented.
Stroub, R. H.
core   +1 more source

Study on the damage prediction model of PTFE/AL projectiles on the basis of regression analysis

open access: yesAIP Advances
Polytetrafluoroethylene/aluminum (PTFE/AL) projectiles can effectively enhance the damage efficiency of traditional projectiles. Numerical simulation via ANSYS AUTODYN and data analysis via Origin are effective means to help predict the damage efficiency
Huan Tong   +4 more
doaj   +1 more source

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