This article presents a secure framework for remote healthcare monitoring in the context of home isolation, thereby addressing the concerns related to untrustworthy client connections to a hospital information system (HIS) within a secure network. Our proposed solution leverages a public blockchain network as a secure distributed database to buffer and transmit patient vital signs. The framework integrates an algorithm for the secure gathering and transmission of vital signs to the Ethereum network. Additionally, we introduce a publish/subscribe paradigm, thus enhancing security using the TLS channel to connect to the blockchain network. An analysis of the maintenance cost of the distributed database underscores the cost-effectiveness of our approach. In conclusion, our framework provides a highly secure and economical solution for remote healthcare monitoring in home isolation scenarios.

Recent measurements from the Atacama Cosmology Telescope (ACT), combined with Planck and DESI data, suggest a scalar spectral index nₛ higher than the Planck 2018 baseline, thereby placing conventional attractor-type inflationary models such as Starobinsky R² and Higgs inflation under increasing tension at the ≳ 2σ level. In this work, we examine quantum-corrected ϕ⁴ inflation with a non-minimal coupling to gravity. Introducing an anomalous scaling parameter γ to capture quantum corrections to the effective potential, we derive analytic expressions for the inflationary observables nₛ and r. Confronting these predictions with ACT, Planck, and BAO+lensing constraints, we demonstrate that modest values of γ can raise nₛ into the ACT-preferred range while maintaining a strongly suppressed tensor-to-scalar ratio. For instance, with N = 60 and γ ≃ 0.006, the model predicts nₛ ≃ 0.974 and r ≃ 0.007, in excellent agreement with current bounds. We further investigate preheating dynamics, focusing on particle production via parametric resonance in quantum-corrected ϕ⁴ inflation with a non-minimal coupling to gravity. In this scenario, the inflaton ϕ couples to an additional scalar χ through an interaction g²ϕ²χ². In Minkowski spacetime, the resonance dynamics reduce to the Mathieu equation, and we find that broad resonance can be readily achieved, leading to efficient particle production.

We investigate the particle production due to parametric resonances in a model of inflation where the lightest composite state stemming from the minimal walking technicolor theory plays the role of the inflaton. For this model of inflation, the effective theory couples nonminimally to gravity. Regarding the preheating, we study in detail a model of a composite inflaton field $\varphi$ coupled to another scalar field $\chi$ with the interaction term $g^2{\varphi }^2{\chi }^2$. Particularly, in Minkowski space, the stage of parametric resonances can be described by the Mathieu equation. Interestingly, we discover that broad resonances can be typically achieved and are potentially efficient in our model causing the particle number density in this process to exponentially increase.

In this work, we investigate the non-minimally coupled scenario in the context of warm inflation with quantum-corrected self-interacting potential. We transform the potential in the Jordan frame to the Einstein frame and consider a dissipation parameter of the form $$\Gamma = C_{T}T$$Γ = C T T with $$C_T$$C T being a coupling parameter. We focus on the strong regime of which the interaction between inflaton and radiation fluid has been taken into account. We compute inflationary observables and constrain the parameters of our model using current Planck 2018 data. With the sizeable number of e-folds and proper choices of parameters, we discover that allowed values of $$C_T$$C T lie in the range $$0.014\lesssim C_{T}\lesssim 0.020$$0.014 ≲ C T ≲ 0.020 in which the predictions are in good agreement with the latest Planck 2018 results at the $$2\,\sigma $$2 σ confident level.