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We investigate the dynamics of a nonlinear system modeling tumor growth with drug application. The tumor is viewed as a mixture consisting of proliferating, quiescent and dead cells as well as a nutrient in the presence of a drug. The…

偏微分方程分析 · 数学 2015-06-22 Donatella Donatelli , Konstantina Trivisa

We study real-time nucleation in perturbative high-temperature quantum field theories. Specifically, we incorporate the evolution of thermally fluctuating plasma driven out of equilibrium by nucleation. This plasma forms the thermal bath…

高能物理 - 唯象学 · 物理学 2025-06-27 Joonas Hirvonen

Achieving effective synergy between radiotherapy and immunotherapy is critical for optimizing tumor control and treatment outcomes. To explore the underlying mechanisms of this synergy, we have investigated a novel treatment approach known…

定量方法 · 定量生物学 2025-04-23 Yixun Xing , Casey Moore , Debabrata Saha , Dan Nguyen , MaryLena Bleile , Xun Jia , Robert Timmerman , Hao Peng , Steve Jiang

Nuclear reaction rates determine the abundances of isotopes in stellar burning processes. A multitude of reactions determine the reaction flow pattern which is described in terms of reaction network simulations. The reaction rates are…

天体物理仪器与方法 · 物理学 2010-11-03 M. Wiescher , T. Rauscher

We derive a Cahn-Hilliard-Darcy model to describe multiphase tumour growth taking interactions with multiple chemical species into account as well as the simultaneous occurrence of proliferating, quiescent and necrotic regions. Via a…

偏微分方程分析 · 数学 2019-11-01 Harald Garcke , Kei Fong Lam , Robert Nürnberg , Emanuel Sitka

This paper studies a system of Ordinary Differential Equations modeling a chemical reaction network and derives from it a simulation tool mimicking Loss of Function and Gain of Function mutations found in cancer cells. More specifically,…

分子网络 · 定量生物学 2020-04-07 Sara Sommariva , Giacomo Caviglia , Michele Piana

The new statistical approach for calculation of radiation processes with heavy multielectron ions in plasma is developed. The method consists in consideration of atomic structure as a condensed medium, characterized by the spectrum of…

等离子体物理 · 物理学 2015-06-18 Alexander V. Demura , Mikhail B. Kadomtsev , Valery S. Lisitsa , Vladimir A. Shurygin

We present a mechanistic biomathematical model of molecular radiotherapy of thyroid disease. The general model consists of a set of differential equations describing the dynamics of different populations of thyroid cells with varying…

医学物理 · 物理学 2021-10-15 Araceli Gago-Arias , Sara Neira , Filippo Terragni , Juan Pardo-Montero

We consider two minimal mathematical models for cancer dynamics and self-adaptation. We aim to capture the interplay between the rapid progression of cancer growth and the possibility to leverage and enhance self-adaptive defense mechanisms…

适应与自组织系统 · 物理学 2025-03-27 Christian Kuehn

According to the standard model of cosmology, the early universe has been dominated by radiation or non-relativistic matter in several eras of its history. However, many cosmological calculations involving particle processes are commonly…

广义相对论与量子宇宙学 · 物理学 2018-03-12 Juho Lankinen , Iiro Vilja

We develop a multiphysics-based model to predict the response of localized tumors to combined-hyperthermia-radiotherapy (CHR) treatment. This procedure combines hyperthermia (tumor heating) with standard radiotherapy to improve efficacy of…

组织与器官 · 定量生物学 2019-07-05 Japan K. Patel , Richard Vasques , Barry D. Ganapol

We investigate accelerated Unruh-deWitt detectors as a model for particle decay. We find non-trivial decay rates, including a pattern of peaks in decay rate that extends to lower accelerations. Applying our model to the alpha decay of…

广义相对论与量子宇宙学 · 物理学 2023-10-11 Wim Beenakker , David Venhoek

Recent evidence suggests that nongenetic (epigenetic) mechanisms play an important role at all stages of cancer evolution. In many cancers, these mechanisms have been observed to induce dynamic switching between two or more cell states,…

定量方法 · 定量生物学 2023-06-16 Einar Bjarki Gunnarsson , Jasmine Foo , Kevin Leder

For the model of periodic chronic myelogenous leukemia considered by Pujo-Menjouet, Mackey et al., model consisting of two delay differential equations, the equation for the density of so-called "resting cells" was studied from numerical…

动力系统 · 数学 2014-04-11 Anca Veronica Ion

The evolution of an electron beam colliding head-on with a strong plane-wave field is investigated in the framework of strong-field QED including radiation-reaction effects due to photon emission. Employing a kinetic approach to describe…

高能物理 - 唯象学 · 物理学 2014-08-07 Norman Neitz , Antonino Di Piazza

The uncontrolled proliferation of cancer cells and their interaction with healthy tissue poses a major challenge in oncology. This manuscript develops and analyzes mathematical models that describe tumor response to radiotherapy by…

The density matrix in the Lindblad form is used to describe the behavior of the Free-Electron Laser (FEL) operating in a quantum regime. The detrimental effects of the spontaneous emission on coherent FEL operation are taken into account.…

加速器物理 · 物理学 2018-12-26 H. Fares , G. R. M. Robb , N. Piovella

The radiative correction to the equation of motion for a moving charged particle is one of the oldest open problems in physics. The problem originates in the emission of radiation by an accelerated charge, which must result in a loss of…

经典物理 · 物理学 2023-12-20 Yarden Sheffer , Yaron Hadad , Morgan H. Lynch , Liang Jie Wong , Ido Kaminer

We investigate a partial differential equation model of a cancer cell population, which is structured with respect to age and telomere length of cells. We assume a continuous telomere length structure, which is applicable to the clonal…

偏微分方程分析 · 数学 2019-03-06 József Z. Farkas , Glenn F. Webb

Prediction models developed before the introduction of a new treatment may be used to estimate treatment effects of newly introduced treatments. One approach, known as model-based clinical evaluation in radiotherapy, does this by comparing…