Results 41 to 50 of about 979 (82)

Ionization Potential Depression and Fermi Barrier in Warm Dense Matter: A First‐Principles Approach

Contributions to Plasma Physics, Volume 65, Issue 8-9, October 2025.
ABSTRACT Ionization potential depression (IPD) is of crucial importance to understand and accurately predict the properties of dense, partially ionized plasmas. Many models of IPD have been developed that, however, exhibit largely varying results. Recently, a novel approach was proposed that is based on first‐principles quantum Monte Carlo simulations ...
Michael Bonitz, Linda Kordts
wiley   +1 more source

Partition Functions and Mass Action Constants of Plasmas of Light Elements at Higher Temperatures

Contributions to Plasma Physics, Volume 65, Issue 7, August 2025.
ABSTRACT We first analyze the relations between the work of Planck and Klimontovich and show that Klimontovich's kinetic theory of non‐ideal plasmas confirms Planck's partition function for the hydrogen plasma. We discuss and check the Planck‐Brillouin‐Larkin (PBL) expressions for Hydrogen with PIMC calculations and derive new partition functions and ...
Werner Ebeling, Gerd Röpke
wiley   +1 more source

Levinson's theorem for the Schr\"{o}dinger equation in two dimensions

, 1998
Levinson's theorem for the Schr\"{o}dinger equation with a cylindrically symmetric potential in two dimensions is re-established by the Sturm-Liouville theorem.
A. Martin, C. N. Yang, D. Bollé, G. J. Ni, J. M. Jauch, L. Rosenberg, L. Rosenberg, M. E. Portnoi, N. Levinson, N. Poliatzky, Q. G. Lin, R. G. Newton, R. G. Newton, R. G. Newton, R. G. Newton, R. G. Newton, Shi-Hai Dong, Xi-Wen Hou, Z. Q. Ma, Z. Q. Ma, Z. Q. Ma, Z. Q. Ma, Z. Q. Ma, Z. R. Iwinski, Zhong-Qi Ma   +24 more
core   +1 more source

Soft‐Clipping Autoregressive Models for Ordinal Time Series

Applied Stochastic Models in Business and Industry, Volume 41, Issue 3, May/June 2025.
ABSTRACT The linear autoregressive models are among the most popular models in the practice of time series analysis, which constitutes an incentive to adapt them to ordinal time series as well. Our starting point for modeling ordinal time series data is the latent variable approach to define a generalized linear model.
Christian H. Weiß, Osama Swidan
wiley   +1 more source

Problems of quantum‐statistical thermodynamics of plasmas: High‐ and low‐temperature limits and analyticity

Contributions to Plasma Physics, Volume 65, Issue 1, January 2025.
Abstract The OCP plasma model which has been the favourite plasma model of Gabor Kalman is simple but on the other side connected with some principal difficulties, and gave rise to some controversies. We discuss here the three main problems of Coulomb systems, the limit cases of the parameter ξ∼e2/ℏT$$ \xi \sim \left({e}^2/\mathrm{\hslash}\sqrt{T ...
Werner Ebeling
wiley   +1 more source

Mathematical Modelling of Tumour Treatment With Chemotherapy

Journal of Applied Mathematics, Volume 2025, Issue 1, 2025.
In this study, a cancer disease model incorporating dynamics between immune cells and tumour cells, as well as competition between tumour cells and normal cells, was formulated in an attempt to understand the interaction dynamics that govern the complex interplay within the tumour microenvironment.
F. S. Nyaweni, W. Mbava, Yeou Jiann Lim
wiley   +1 more source

A discrete mean value of the Riemann zeta function

Mathematika, Volume 70, Issue 4, October 2024.
Abstract In this work, we estimate the sum ∑0<ℑ(ρ)⩽Tζ(ρ+α)X(ρ)Y(1−ρ)$$\begin{align*} \sum _{0 < \Im (\rho) \leqslant T} \zeta (\rho +\alpha)X(\rho) Y(1\!-\! \rho) \end{align*}$$over the nontrivial zeros ρ$\rho$ of the Riemann zeta function where α$\alpha$ is a complex number with α≪1/logT$\alpha \ll 1/\log T$ and X(·)$X(\cdot)$ and Y(·)$Y(\cdot)$ are ...
Kübra Benli, Ertan Elma, Nathan Ng
wiley   +1 more source

Inverse spectral results for Schr\"odinger operators on the unit interval with potentials in L^P spaces

, 2007
We consider the Schr\"odinger operator on $[0,1]$ with potential in $L^1$. We prove that two potentials already known on $[a,1]$ ($a\in(0,{1/2}]$) and having their difference in $L^p$ are equal if the number of their common eigenvalues is sufficiently ...
L Amour, Levin B J, T Raoux
core   +2 more sources

Impact of surgical aortic valve replacement and transcatheter aortic valve implantation on cardiovascular and cerebrovascular controls: A pilot study

Physiological Reports, Volume 12, Issue 17, September 2024.
Abstract Surgical aortic valve replacement (SAVR) and transcatheter aortic valve implantation (TAVI) are options in severe aortic valve stenosis (AVS). Cardiovascular (CV) and cerebrovascular (CBV) control markers, derived from variability of heart period, systolic arterial pressure, mean cerebral blood velocity and mean arterial pressure, were ...
Vlasta Bari, Francesca Gelpi, Beatrice Cairo, Martina Anguissola, Elena Acerbi, Mattia Squillace, Beatrice De Maria, Enrico Giuseppe Bertoldo, Valentina Fiolo, Edward Callus, Carlo De Vincentiis, Francesco Bedogni, Marco Ranucci, Alberto Porta   +13 more
wiley   +1 more source

Autoregressive modelling for Sub‐THz spatio‐temporal wideband scattered reflection coefficient measurement of complex structures

IET Microwaves, Antennas &Propagation, Volume 18, Issue 7, Page 494-504, July 2024.
The authors present spatio‐temporally resolved wideband measurements of Sub‐Terahertz (Sub‐THz) reflection coefficients in the frequency range of 92–110 GHz. A stochastic model for single reflection fixed links that is capable of modelling random scattering from small‐scale discontinuities such as those encountered in complex structures in walls and ...
Demos Serghiou, Mohsen Khalily, Ali Ali, Tim Brown, Rahim Tafazolli   +4 more
wiley   +1 more source