Results 71 to 80 of about 5,021,065 (259)

On local semirings induced by topologies: An algebraic approach to the Collatz conjecture

open access: yesApplied General Topology
We present an algebraic approach to the Collatz conjecture by studying the topology τf  on ℕ induced by the Collatz function f, where the open sets θ ⊂ ℕ satisfy f-1 ( θ ) ⊂ θ .
Angel Guale, Jorge Vielma
doaj   +1 more source

Reconstruction of a Massive Femoral Bone Defect Using a Double-barreled Free Vascularized Fibular Bone Graft After Wide Resection of Femoral Chondrosarcoma

open access: yesKaohsiung Journal of Medical Sciences, 2009
Salvaging the limb after malignant bone tumor ablation is a tough challenge for a reconstructive surgeon confronting such extensive bone defects. A 40-year-old male without any underlying disease was incidentally diagnosed with a chondrosarcoma over his ...
Chun-Hui Chu, I-Ming Jou, Shyh-Jou Shieh
doaj   +1 more source

Interpolating sets in the maximal ideal space of $H^\infty$. [PDF]

open access: yesMichigan Mathematical Journal, 1992
Let \(M(H^ \infty)\) be the maximal ideal space (= spectrum) of the Banach algebra of bounded analytic functions on the open unit disk \(\mathbb{D}\). As usual, functions in \(H^ \infty\) are identified with their Gelfand transform. For \(f\in H^ \infty\) let \(Z(f)=\{m\in M(H^ \infty)\): \(f(m)=0\}\) denote its zero set.
openaire   +2 more sources

dynoGP: Deep Gaussian Processes for Dynamic System Identification

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This work introduces a novel class of deep models for system identification, dynamical deep Gaussian processes, which combine the strengths of data‐driven methods, such as those based on neural network architectures, with the ability to output a probability distribution for uncertainty representation.
Alessio Benavoli   +3 more
wiley   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur   +5 more
wiley   +1 more source

Extreme Maximal Ideals of a Partially Ordered Vector Space [PDF]

open access: yesProceedings of the American Mathematical Society, 1956
1. Let V be a partially ordered vector space with an order unit e. It is well known that the class 9W of maximal ideals of V is in one-one correspondence with the class K of normalized positive linear functionals, in the sense that to each MC9Y corresponds a positive linear functional Om with M as its null-space and with OkM(e) = 1.
openaire   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez   +5 more
wiley   +1 more source

Blaschke inductive limits of uniform algebras

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
We consider and study Blaschke inductive limit algebrasA(b), defined as inductive limits of disc algebras A(D) linked by a sequence b={Bk}k=1∞ of finite Blaschke products.
S. A. Grigoryan, T. V. Tonev
doaj   +1 more source

Low‐Temperature Imidization of Polyimides (PI) for Scalable Manufacturing of Flexible Wearable Electronics

open access: yesAdvanced Engineering Materials, EarlyView.
Low‐temperature imidization of PEG‐modified polyimide enables fully screen‐printed, roll‐to‐roll fabrication of flexible electrodes on PET substrates, delivering robust mechanical durability and reliable ECG/EMG signal performance for wearable electronics.
Akib Abdullah Khan, Jong‐Hoon Kim
wiley   +1 more source

Concatenation of Space-Time Block Codes and Turbo Trellis Coded Modulation (ST-TTCM) Over Rician Fading Channels With Imperfect Phase Reference

open access: yesElectrica, 2019
In this paper, the performance of Space-Time - Turbo Trellis Coded Modulation (ST-TTCM) is evaluated over Rician fading channels with imperfect phase reference.
Osman N. UCAN
doaj   +2 more sources

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