Results 111 to 120 of about 2,845,707 (370)
Contemporary Accounting Research, EarlyView.ABSTRACT During the COVID‐19 pandemic, states imposed restrictions intended to slow the spread of the virus. We investigate whether states' reliance on consumption tax revenue, relative to other tax revenue sources, is associated with the duration of COVID‐19 mobility restrictions.
Nathan C. Goldman +2 more
wiley +1 more source
Polarization of nuclear spins by a cold nanoscale resonator [PDF]
, 2011 A cold nanoscale resonator coupled to a system of nuclear spins can induce spin relaxation. In the low-temperature limit where spin-lattice interactions are “frozen out,” spontaneous emission by nuclear spins into a resonant mechanical mode can become ...
Butler, Mark C., Weitekamp, Daniel P.
core +1 more source
Magnetic flows on Sol-manifolds: dynamical and symplectic aspects
, 2008 We consider magnetic flows on compact quotients of the 3-dimensional solvable geometry Sol determined by the usual left-invariant metric and the distinguished monopole.
A. Hattori +14 more
core +1 more source
Trait coevolution and causal inference using generalized dynamic phylogenetic models
Methods in Ecology and Evolution, EarlyView.Abstract Phylogenetic comparative methods are widely used to study trait coevolution across biological and cultural domains. The most common methods are phylogenetic generalized linear (mixed) models, phylogenetic path analysis, Pagel's ‘discrete’ method and Ornstein–Uhlenbeck models. While some frameworks like generalized linear mixed models are quite
Erik J. Ringen +3 more
wiley +1 more source
A Novel Tri-Beam Antenna System Based on U-Shaped Dipole [PDF]
Radioengineering, 2019 Consisting of 6 radiating elements and a 3×3 Butler matrix, a novel tri-beam antenna system is proposed in this paper. The radiating element consists of two U-shaped arms and coupled strips, which shows a wide impedance characteristic.
X. W. Dai +4 more
doaj
Animal Conservation, EarlyView.Deforestation in the tropics is a major threat to forest‐specialist animals, many of which are already threatened with extinction. We assessed how forest fragmentation and its associated edge‐effects impact animal biodiversity in Northwest Madagascar using soundscape analysis and acoustic indices.
Daniel Hending +6 more
wiley +1 more source
Insertion Loss and Phase Compensation Using a Circular Slot Via-Hole in a Compact 5G Millimeter Wave (mmWave) Butler Matrix at 28 GHz. [PDF]
Sensors (Basel), 2022 Md Jizat N +4 more
europepmc +1 more source
DESIGN OF 4×4 BUTLER MATRIX AND ITS PROCESS MODELING USING PETRI NETS FOR PHASE ARRAY SYSTEMS [PDF]
, 2020 Ved Prakash +3 more
openalex +1 more source
Compact, Ultra-Wideband Butler Matrix Beamformers for the Advanced 5G Band FR3—Part I
ElectronicsButler Matrix networks are well established as beamforming networks for phased antenna arrays. The challenge we address in this work is to cover the entire (advanced 5G or 6G) FR3 band (7–24 GHz) with a single network, while retaining low losses and ...
Tzichat M. Empliouk +9 more
semanticscholar +1 more source
Saddlepoint approximation for moment generating functions of truncated random variables
, 2005 We consider the problem of approximating the moment generating function (MGF) of a truncated random variable in terms of the MGF of the underlying (i.e., untruncated) random variable.
Butler, Ronald W., Wood, Andrew T. A.
core +1 more source