Results 41 to 50 of about 789,450 (313)

Probing coherent charmonium photoproduction off light nuclei at medium energies

open access: yes, 2003
We demonstrate how the elementary amplitudes $\gamma N\to \Psi N$, the amplitude of the nondiagonal $J/\psi N\Leftrightarrow \psi' N$ transition, and the total $J/\psi N$ and $\psi' N$ cross sections can be determined from measurements of the coherent $J/
D. E. Groom   +20 more
core   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

open access: yesInternational Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam   +2 more
wiley   +1 more source

Anomalous Cognition: An Umbrella Review of the Meta-Analytic Evidence

open access: yesJournal of Anomalous Experience and Cognition, 2021
Objective: The aim of this study was to assess the results of all meta-analyses on anomalous cognition conducted between 1989 and 2021 in order to find moderators associated with greater effect sizes.
Patrizio Tressoldi, Lance Storm
doaj   +1 more source

J/Psi and Psi' Suppression in Hadronic Matter

open access: yes, 1995
We present a microscopic calculation of the breakup cross sections of $J/\psi$ and $\psi'$ on pions and nucleons as a function of the kinetic energy.
Alde   +7 more
core   +2 more sources

QCD anomaly mediation of psi'. -->. psi. pi. /sup 0/ and psi'. -->. psi eta [PDF]

open access: yes, 1981
Various decay processes mediated dominantly by pseudoscalar couplings to the QCD axial-vector anomaly are discussed. Coupling strengths of earlier calculations are used to compute psi' ..-->.. ..pi../sup 0/ psi/psi' ..-->.. eta psi, obtaining good agreement with experiment. (GHT)
Milton, K. A.   +2 more
openaire   +2 more sources

A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg   +5 more
wiley   +1 more source

I rapporti tra PSI e SFIO nel periodo della neutralità italiana (1914-1915)

open access: yesStoricamente, 2019
The Second International, which the PSI and the SFIO were part of, had undertaken over the years the fight against the war. His attitude changed, however, with the outbreak of the First World War.
Elisa Marcobelli
doaj   +1 more source

بررسی اثر عنصر بارش بر منابع آب زیرزمینی با استفاده از تحلیل سری‌های زمانی- مکانی خشکسالی (مطالعه موردی: دشت مشهد در حوزه آبخیز کشف رود) [PDF]

open access: yesجغرافیا و مخاطرات محیطی, 2017
عوامل مختلف طبیعی و انسانی در چند دهه اخیر باعث ایجاد شرایط بحرانی و افت سطح آب‌های زیرزمینی در بیشتر حوزه‌های آبخیز کشور از جمله استان خراسان رضوی شده است.
سمیرا نورمحمدی   +2 more
doaj   +1 more source

Hadron Spectroscopy from BES and CLEOc

open access: yes, 2005
Recent results from BES and CLEOc experiments on hadron spectroscopy and charmonium decays using J/psi, psi' and psi'' data samples collected in e+e- annihilation are reviewed, including the observation of X(1835) in J/psi --> gamma pi+ pi- eta', study ...
Yuan, Chang-Zheng
core   +1 more source

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

open access: yesAdvanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira   +4 more
wiley   +1 more source

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