Results 1 to 10 of about 272,660 (146)

Relations between positivity, localization and degrees of freedom: The Weinberg–Witten theorem and the van Dam–Veltman–Zakharov discontinuity

open access: yesPhysics Letters B, 2017
The problem of accounting for the quantum degrees of freedom in passing from massive higher-spin potentials to massless ones, and the inverse problem of “fattening” massless tensor potentials of helicity ±h to their massive s=|h| counterparts, are solved
Jens Mund   +2 more
doaj   +4 more sources

A STUDY OF LEAKAGE-CORRECTED TWO-STEP METHOD BASED ON THE NODAL EQUIVALENCE THEORY FOR FAST REACTOR ANALYSIS [PDF]

open access: yesEPJ Web of Conferences, 2021
The conventional two-step method based on the generalized equivalence theory (GET) cannot be directly applied to the fast reactor analysis since the assumption of the space-energy separability is not very valid due to a relatively long neutron mean free ...
Jang Seongdong, Kim Yonghee
doaj   +1 more source

Size-dependent Vibration Analysis of Non-uniform Mass Sensor Nanobeams [PDF]

open access: yesMechanics of Advanced Composite Structures, 2021
In the present paper, the exact modeling and frequency analysis of the mass sensor nanobeam are investigated based on a higher-order elasticity theory with taking into account the longitudinal discontinuity. The energy equations of the beam are expressed
mostafa Nazemizadeh   +3 more
doaj   +1 more source

NUMERICAL STUDY OF THE FRACTURING MECHANISM AROUND A BLASTHOLE AND INVESTIGATING THE EFFECT OF DISCONTINUITIES ON THE FRACTURE PATTERN

open access: yesRudarsko-geološko-naftni Zbornik, 2020
The mechanism of rock fragmentation around blastholes is of prior importance in the evaluation of drilling and blasting performance in open pit and underground mines.
Ali Reza Hajibagherpour   +2 more
doaj   +1 more source

The effectiveness of influenza vaccine among elderly Chinese: A regression discontinuity design based on Yinzhou regional health information platform

open access: yesHuman Vaccines & Immunotherapeutics, 2022
In China, a free influenza vaccination policy is being implemented among individuals aged 70 years and over in Zhejiang province during the COVID-19 pandemic.
Guangxu Liu   +6 more
doaj   +1 more source

Griffith energies as small strain limit of nonlinear models for nonsimple brittle materials

open access: yesMathematics in Engineering, 2020
We consider a nonlinear, frame indifferent Griffith model for nonsimple brittle materials where the elastic energy also depends on the second gradient of the deformations.
Manuel Friedrich
doaj   +1 more source

Arbitrarily Oriented Dense Object Detection Based on Center Point Network in Remote Sensing Images

open access: yesRemote Sensing, 2022
Arbitrarily oriented object detection has recently attracted increasing attention for its wide applications in remote sensing. However, it is still a challenge for detection algorithms because of complex scenes, small size, rotation, densely parked.
Peng Wang   +4 more
doaj   +1 more source

Non-rigid Registration of Medical Image Data with Incomplete Information

open access: yesVìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Modelûvannâ, 2010
The problem of non-rigid registration of images, where certain parts are missing, is considered in the context of pre- and intraoperative or damaged data.
O. V. Museyko   +2 more
doaj   +1 more source

Discontinuities in the Electromagnetic Fields of Vortex Beams in the Complex Source/Sink Model [PDF]

open access: yes, 2017
An analytical discontinuity is reported in what was thought to be the discontinuity-free exact nonparaxial vortex beam phasor obtained within the complex source/sink model.
Pi, Liang-Wen   +2 more
core   +3 more sources

Application of a Premelting Model to the Lithosphere‐Asthenosphere Boundary

open access: yesGeochemistry, Geophysics, Geosystems, 2020
A seismic discontinuity known as the G‐discontinuity, which has been prevailingly detected in the oceanic mantle, is considered to provide evidence of a sharp lithosphere‐asthenosphere boundary (LAB). We investigate whether this sharp LAB is explained by
Hatsuki Yamauchi, Yasuko Takei
doaj   +1 more source

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