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Yong-Shou Chen

Publications and source records attributed to Yong-Shou Chen.

3 recordsLinked to original sources

V-Reactor Dynamics: Dual Chaotic Systems and Synchronizing Human Defenses with Viral Evolution

The COVID-19 pandemic exposed critical gaps in our ability to predict viral emergence and trajectory. Moving beyond sequence-dependent surveillance, we introduce V-Reactor Dynamics, a physics-based framework that models host-virus interaction as a synchronized dual chaotic system. At its core is the reactivity parameter ($ρ$), a measurable quantity derived from viral replication, immune neutralization, and drug interaction cross sections. We show that $ρ$ dictates both intra-host viral load phases, peak ($ρ>0$), plateau ($ρ\approx0$), and clearance ($ρ<0$), and, through a scaling law, the Lyapunov Exponent governing population-level transmission dynamics. Retrospectively, the model correctly differentiates SARS-CoV-2's higher transmissibility from SARS-CoV's lethality, accurately forecasts Omicron waves, and quantifies trade-offs between lockdown intensity and socioeconomic cost. Crucially, V-Dynamics enables pre-outbreak prediction via in vitro measurement of viral reaction cross sections, offering a pathway to proactive pandemic defense. By integrating quantum-mechanical interaction models with chaos theory across scales, this framework provides a quantitative roadmap for anticipating, controlling, and ultimately preempting future viral threats.

physics.bio-ph

Finding the best basis states for the variation after projection nuclear wave functions

The variation after projection (VAP) method is expected to be an efficient way of getting the optimized nuclear wave functions, so that they can be as close as possible to the exact shell model ones. However, we found there are two additional problems that may seriously affect the convergence of the VAP iteration. The first problem is, if a randomly selected projected basis state does not mix with a VAP wave function in the VAP calculation, then it is likely that this basis state will never mix with the VAP wave function even after the VAP iteration converges, which means such selected projected basis state is useless. The other problem is the poor orthonormality among the projected basis states that seriously affect the accuracy of the calculated VAP wave function. In the present work, solutions for these two problems are proposed and some examples are presented to test the validity. It turns out that, with the present solutions, the most important projected basis states can be reliably obtained and the fully optimized VAP wave functions can be accurately and efficiently calculated.

nucl-th

The nature of the Li enrichment in the most Li-rich giant star

About one percent of giants\upcite{Brown1989} are detected to have anomalously high lithium (Li) abundances in their atmospheres, conflicting directly with the prediction of the standard stellar evolution models\upcite{Iben1967}, and making the production and evolution of Li more intriguing, not only in the sense of the Big Bang nucleosynthesis\upcite{Cyburt2016,Spite1982} or the Galactic medium\upcite{Tajitsu2015}, but also the evolution of stars. Decades of efforts have been put into explaining why such outliers exist\upcite{Sackmann1999, Denissenkov2004, Charbonnel2010}, yet the origins of Li-rich giants are still being debated. Here we report the discovery of the most Li-rich giant known to date, with a super-high Li abundance of 4.51. This rare phenomenon was snapshotted together with another short-term event that the star is experiencing its luminosity bump on the red giant branch. Such high Li abundance indicates that the star might be at the very beginning of its Li-rich phase, which provides a great opportunity to investigate the origin and evolution of Li in the Galaxy. A detailed nuclear simulation is presented with up-to-date reaction rates to recreate the Li enriching process in this star. Our results provide tight constraints on both observational and theoretical points of view, suggesting that low-mass giants can produce Li inside themselves to a super high level via $^{7}$Be transportation during the red giant phase.

astro-ph.SR