Results 81 to 90 of about 9,462,622 (260)

The development of multiplicative thinking and proportional reasoning: Models of conceptual learning and transfer [PDF]

open access: yes, 2012
This thesis considers the development of multiplicative thinking and proportional reasoning from two perspectives. Firstly, it examines the research literature on progressions in conceptual understanding to create a Hypothetical Learning Trajectory (HLT).
Wright, Vincent John
core  

Hidden Periodicity and Chaos in the Sequence of Prime Numbers

open access: yesAdvances in Mathematical Physics, 2011
Logarithmic gaps have been used in order to find a periodic component of the sequence of prime numbers, hidden by a random noise (stochastic or chaotic).
A. Bershadskii
doaj   +1 more source

On trees and the multiplicative sum Zagreb index

open access: yesCommunications in Combinatorics and Optimization, 2016
For a graph $G$ with edge set $E(G)$‎, ‎the multiplicative sum Zagreb index of $G$ is defined as‎ ‎$\Pi^*(G)=\Pi_{uv\in E(G)}[d_G(u)+d_G(v)]$‎, ‎where $d_G(v)$ is the degree of vertex $v$ in $G$‎.
M‎. ‎Eliasi, A‎. ‎Ghalavand
doaj   +1 more source

Unified Pressure and Field Response Across Distinct Charge‐Order Regimes in Ti‐Doped CsV3Sb5

open access: yesAdvanced Functional Materials, EarlyView.
We microscopically investigate the interplay between charge order and superconductivity in a kagome superconductor across regimes of long‐ and short‐range charge order. Hydrostatic‐pressure and magnetic‐field μSR$\mu{\rm SR}$ measurements reveal remarkably similar superconducting and normal‐state time‐reversal‐symmetry‐breaking responses in both ...
P. Kral   +12 more
wiley   +1 more source

Multiplicative uncertainty, central bank transparency and optimal degree of conservativeness [PDF]

open access: yes
This paper extends the results of Kobayashi (2003) and Ciccarone and Marchetti (2009) by considering the optimal choice of central bank conservativeness. It is shown that the government can choose a sufficiently populist but opaque central banker so that
Meixing Dai
core  

Mechanistic Origins of Chemo‐Mechanical Instability and Failure in Solid‐State Lithium‐Sulfur Electrodes

open access: yesAdvanced Functional Materials, EarlyView.
Conversion‐induced sulfur expansion generates strong mechanical constraints and localized stresses within solid‐state Li‐S cathodes. Heterogeneous solid‐electrolyte confinement creates tensile strain‐energy hotspots that govern particle cracking. Larger sulfur particles accelerate fracture, while higher porosity relaxes constraint and delays damage ...
Arpan K. Sharma   +3 more
wiley   +1 more source

A new mixed multiplicative-additive model for seasonal adjusment [PDF]

open access: yes
Usually, seasonal adjustment is based on time series models which decompose an unadjusted series into the sum or the product of four unobservable components (trendcycle, seasonal, working-day and irregular components).
Arz, Stephanus
core  

GeS as an Emerging OTS Material: Atomic Structure and Modeling of ON/OFF Switching

open access: yesAdvanced Functional Materials, EarlyView.
The structural puzzle of glassy GeS, an advanced memory‐selector material, has finally been disentangled, revealing a patchwork of mixed tetrahedral and trigonal species. Under a high electric field, over‐ and under‐coordinated Ge and S defects, together with three‐membered rings, form an interconnected network associated with localized and extended ...
Andrey Tverjanovich   +13 more
wiley   +1 more source

Multiplicative order of Gauss periods

open access: yes, 2007
We obtain a lower bound on the multiplicative order of Gauss periods which generate normal bases over finite fields. This bound improves the previous bound of J. von zur Gathen and I.
Igor E. Shparlinski   +2 more
core  

Configuration‐Encoded Cell Alignment by Light‐Gated Silicon Photovoltaic Microcell Arrays

open access: yesAdvanced Functional Materials, EarlyView.
Light‐gated silicon photovoltaic microcells convert pulsed illumination into localized electrical cues. Arranging otherwise similar microcells into four‐lobed, six‐lobed, or circular patterns directs fibroblasts into corresponding local arrangements without wired stimulation.
Yifan Tao   +7 more
wiley   +1 more source

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