Results 11 to 20 of about 8,623,503 (244)

Design of Active PWM Control Driver Circuit for Torquer System Using CCII

open access: yesIEEE Access, 2021
This research examines a torquer system for satellite attitude control which requires low energy, or average power, to control its moment. The magnetic torquer consists of an LR component, source and switching pulse.
Vijay Kumar Verma, Rajeev Kumar Ranjan
doaj   +1 more source

A Note on Smooth Points in Orlicz Sequence Spaces

open access: yesJournal of Harbin University of Science and Technology, 2021
In this paper,when φ( u) /u→A( u→∞ ) the criterion of smooth points in Orlicz sequence space generated by general Orlicz functions and the equivalence conditions of smooth points with very smooth points and strong smooth points are given. On this basis,
WANG Jing, CUI Yun-an
doaj   +1 more source

The Optical Signature of a Bottom Boundary Layer Ventilation Event in the Northern Gulf of Mexico's Hypoxic Zone

open access: yesGeophysical Research Letters, 2018
Oceanographic observations in the northern Gulf of Mexico captured an unusual combination of atmospheric forcing and shelf frontal dynamics that brought about the surface ventilation of sediment‐laden bottom waters.
Jason K. Jolliff   +5 more
doaj   +1 more source

On 2 - normed space valued paranormed null sequence space

open access: yesBibechana, 2013
In this paper we introduce and study a new class c0 ( S, α‾ , u‾ , ||. , .|| ) of sequences with values in 2- normed space as a generalization of basic null sequence space c0. We investigate some conditions pertaining to the containment relations of the
Narayan Prasad Pahari
doaj   +3 more sources

Hilbert space structure and classical limit of the low energy sector of U(N) quantum Hall ferromagnets

open access: yesSciPost Physics Proceedings, 2023
Using the Lieb–Mattis ordering theorem of electronic energy levels, we identify and construct the Hilbert space of the low energy sector of U(N) quantum Hall/Heisenberg ferromagnets at filling factor M for L Landau/lattice sites.
Manuel Calixto, Alberto Mayorgas, Julio Guerrero
doaj   +1 more source

Iris: Deep Space Small Satellite Radio [PDF]

open access: yes, 2017
With nanosatellites being used for deep space missions, the need for a unique communications architecture to relay valuable mission data back to NASA’s Deep Space Network (DSN) is ...
Space Dynamics Laboratory
core   +1 more source

Weak completeness of the Bourbaki quasi-uniformity

open access: yesApplied General Topology, 2001
The concept of semicompleteness (weaker than half-completeness) is defined for the Bourbaki quasi-uniformity of the hyperspace of a quasi-uniform space.
M.A. Sánchez Granero
doaj   +1 more source

Evaluating U-Space for UAM in Dense Controlled Airspace

open access: yesDrones, 2023
The operation of unmanned aircraft systems in shared airspace can serve as an accelerator for the global economy and a sensitive addition to the existing mix of transportation modes.
Michal Černý   +4 more
doaj   +1 more source

Embedding into discretely absolutely star-Lindelöf spaces II

open access: yesApplied General Topology, 2009
A space X is discretely absolutely star-Lindelöf if for every open cover U of X and every dense subset D of X, there exists a countable subset F of D such that F is discrete closed in X and St(F, U) = X, where St(F, U) = S{U ∈ U : U ∩F 6= Ø}.
Yan-Kui Song
doaj   +1 more source

On the Properties of and Ionospheric Conditions Associated With a Mid‐Latitude Scintillation Event Observed Over Southern United States

open access: yesSpace Weather, 2021
While low and high‐latitude ionospheric scintillation have been extensively reported, significantly less information is available about the properties of and conditions leading to mid‐latitude scintillations.
F. S. Rodrigues   +4 more
doaj   +1 more source

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