Search

Your search keyword '"Carpio-Bernido, M. Victoria"' showing total 87 results
Start Over Author "Carpio-Bernido, M. Victoria"
87 results on '"Carpio-Bernido, M. Victoria"'

1. Resonant Tunneling in Natural Photosynthetic Systems

Author

Gerodias, Kit M., Carpio-Bernido, M. Victoria, and Bernido, Christopher C.

Subjects
Physics - Biological Physics, Quantum Physics
Abstract

The high internal quantum efficiency observed in higher plants remains an outstanding problem in understanding photosynthesis. Several approaches such as quantum entanglement and quantum coherence have been explored. However, none has yet drawn an analogy between superlattices and the geometrical structure of granal thylakoids in leaves. In this paper, we calculate the transmission coefficients and perform numerical simulations using the parameters relevant to a stack of thylakoid discs. We then show that quantum resonant tunneling can occur at low effective mass of particles for 680 nm and 700 nm incident wavelengths corresponding to energies at which photosynthesis occurs., Comment: 12 pages, 5 Figures

Published
2021
Full Text
View/download PDF

9. Great Barrier Reef degradation, sea surface temperatures, and atmospheric CO2 levels collectively exhibit a stochastic process with memory.

Author

Elnar, Allan R. B., Cena, Christianlly B., Bernido, Christopher C., and Carpio-Bernido, M. Victoria

Subjects
OCEAN temperature, STOCHASTIC processes, PROBABILITY density function, CORAL declines, REEFS, DIFFUSION coefficients, DIFFUSION
Abstract

Quantifying ecological memory could be done at several levels from the rate of physiological changes in an ecosystem all the way down to responses at the genetic level. One way of unlocking the information encoded in a collective environmental memory is to examine the recorded time-series data generated by different components of an ecosystem. In this paper, we probe into the case of the Great Barrier Reef (GBR) which is threatened by elevated sea surface temperatures (SST) and ocean acidification attributed to rising atmospheric CO2 levels. Specifically, we investigate the interrelated dynamics between the degradation of the GBR, SST, and rising atmospheric CO2 levels, by considering three datasets: (a) the mean percentage hard coral cover of the GBR from the archives of the Australian Institute of Marine Science; (b) SST close to the GBR from the National Oceanic and Atmospheric Administration; and (c) the Keeling curve for atmospheric CO2 levels measured by the Mauna Loa Observatory. We show that fluctuating observables in these datasets have the same memory behavior described by a non-Markovian stochastic process. All three datasets show a good match between empirical and analytical mean square deviation. An explicit analytical form for the corresponding probability density function is obtained which obeys a modified diffusion equation with a time dependent diffusion coefficient. This study provides a new perspective on the similarities of and interaction between the GBR's declining hard coral cover, SST, and rising atmospheric CO2 levels by putting all three systems into one unified framework indexed by a memory parameter μ and a characteristic frequency ν . The short-time dynamics of CO2 levels and SST fall in the superdiffusive regime, while the GBR exhibits hyperballistic fluctuation in percent coral cover with the highest values for μ and ν . [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

13. Numerical simulation of agent-based modeling of spatially inhomogeneous disease dynamics

Author

Bock, W., Fattler, T., Rodiah, I., Tse, O., Bornales, Jinky B., Villagonzalo, Cristine D., Esguerra, Jose Perico H., Soriano, Maricor N., Bernido, Christopher C., Carpio-Bernido, M. Victoria, Center for Analysis, Scientific Computing & Appl., and Applied Analysis

Subjects
Computer simulation, Computer science, Dynamics (mechanics), Statistical physics
Published
2017

20. Damped White Noise Diffusion with Memory for Diffusing Microprobes in Ageing Fibrin Gels

Author

Aure, Rev R.L., Bernido, Christopher C., Carpio-Bernido, M. Victoria, and Bacabac, Rommel G.

Abstract

From observations of colloidal tracer particles in fibrin undergoing gelation, we introduce an analytical framework that allows the determination of the probability density function for a stochastic process beyond fractional Brownian motion. Using passive microrheology via videomicroscopy, mean square displacements of tracer particles suspended in fibrin at different ageing times are obtained. The anomalous diffusion is then described by a damped white noise process with memory, with analytical results closely matching experimental plots of mean square displacements and probability density function. We further show that the white noise functional stochastic approach applied to passive microrheology reveals the existence of a gelation parameter μwhich elucidates the dynamics of constrained tracer particles embedded in a time-dependent soft material. In addition, we found that microstructural heterogeneity of particle environments decreases as the ageing time increases. This study offers experimental insights on the ageing of fibrin gels while presenting a white noise functional stochastic approach that could be applied to other systems exhibiting non-Markovian diffusive behavior.

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results