Results 41 to 50 of about 481,381 (297)

On the Maximum Modulus of Polynomials

open access: yesJournal of Mathematical Analysis and Applications, 1994
The following refinement involving the first coefficients of one result of \textit{T. J. Rivlin} [Am. Math. Month. 67, 251-253 (1960)] is proved: if \(p(z)= \sum^ n_ 0 c_ k z^ k\) is a polynomial of degree \(n\), having no zeros in \(| z|< 1\) and \(| c_ 1|\leq \rho n| c_ 0|\), then for \(0\leq r\leq \rho\leq 1\), \[ M(p,r)\geq \left({1+ r\over 1+ \rho}
Dewan, K.K., Kaur, J.
openaire   +1 more source

Understanding bio‐based polymers: A study of origins, properties, biodegradation and their impact on health and the environment

open access: yesFEBS Open Bio, EarlyView.
This review provides an overview of bio‐based polymer sources, their unique functional properties and their environmental impact, and addresses their role as sustainable alternatives. It discusses end‐of‐life options, including composting and anaerobic digestion for renewable energy.
Sabina Kolbl Repinc   +8 more
wiley   +1 more source

Atomistic modeling of heat treatment processes for tuning the mechanical properties of disordered solids [PDF]

open access: yes, 2019
We investigate the effect of a single heat treatment cycle on the potential energy states and mechanical properties of metallic glasses using molecular dynamics simulations.
Priezjev, Nikolai V.
core   +3 more sources

Assessment of Skin in Patients With Systemic Sclerosis Using High‐Frequency Ultrasound and Shear Wave Elastography: A Comparative Study With Histology, Molecular, and Clinical Parameters

open access: yesArthritis Care &Research, EarlyView.
Objective Ultrasound (US) has been proposed as a potential tool for assessing skin fibrosis in systemic sclerosis (SSc). However, a large‐scale comparison of US‐based assessment with histologic markers of skin fibrosis has not been reported. We evaluated US‐based skin assessments for their face validity (differentiation between involved SSc and healthy
Ruhani Desai   +12 more
wiley   +1 more source

Bayesian interpretation of periodograms

open access: yes, 2009
The usual nonparametric approach to spectral analysis is revisited within the regularization framework. Both usual and windowed periodograms are obtained as the squared modulus of the minimizer of regularized least squares criteria.
Giovannelli, J. -F., Idier, J.
core   +1 more source

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

open access: yesAdvanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian   +4 more
wiley   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar   +6 more
wiley   +1 more source

Mechanical behavior of pumpkin fruits subjected to compression during maturation

open access: yesPesquisa Agropecuária Tropical, 2013
During handling operations, many problems that reduce the quality of vegetables may occur. Mechanical injuries are the leading cause of postharvest losses for the pumpkin, and can take place at any point of the production chain.
Acácio Figueiredo Neto   +4 more
doaj   +1 more source

On the imaginary parts of chromatic root [PDF]

open access: yes, 1980
While much attention has been directed to the maximum modulus and maximum real part of chromatic roots of graphs of order $n$ (that is, with $n$ vertices), relatively little is known about the maximum imaginary part of such graphs.
Brown, Jason I., Wagner, David G.
core   +4 more sources

Extremal non-BPS black holes and entropy extremization

open access: yes, 2006
At the horizon, a static extremal black hole solution in N=2 supergravity in four dimensions is determined by a set of so-called attractor equations which, in the absence of higher-curvature interactions, can be derived as extremization conditions for ...
A. Giryavets   +17 more
core   +1 more source

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