Publications and Projects

- Feb 2023
Role of cholesterol in pulmonary surfactant at ambient and physiological temperatures
Fazle R Dayeen, Bret A Brandner, Stephen B Hall, David Gidalevitz. Biophysical Journal, Feb 2023, Volume 122, Issue 3, Pages 84a, Publisher: Elsevier. https://doi.org/10.1016/j.bpj.2022.11.657.
We have used grazing incidence X-ray off-specular scattering (GIXOS) and grazing incidence X-ray diffraction (GIXD) to obtain the detailed structural data of the interfacial films. The result indicates a radical loss of the long range order among the hydrocarbon chains and the extensive conversion of ordered to disordered structures.

- Sep 2022
Effects of cholesterol on the structure and collapse of DPPC monolayers
Fazle R Dayeen, Bret A Brandner, Michael W Martynowycz, Kamil Kucuk, Michael J Foody, Wei Bu, Stephen B Hall, David Gidalevitz. Biophysical Journal, Sep 2022, Volume 121, Issue 18, Pages 3533-3541, Publisher: Elsevier. https://doi.org/10.1016/j.bpj.2022.07.007.
The studies here determined the structural changes by which cholesterol causes faster collapse by films of dipalmitoyl phosphatidylcholine, and the results suggest that cholesterol promotes adsorption not by altering the unit cell of the ordered phase but by decreasing both its total area and the size of individual crystallites.

- Feb 2022
The interfacial structure of pulmonary surfactant at physiological temperatures
Fazle Dayeen, Bret Brandner, Stephen B Hall, David Gidalevitz. Biophysical Journal, Feb 2022, Volume 121, Issue 3, Pages 489a, Publisher: Elsevier. https://doi.org/10.1016/j.bpj.2021.11.351.
We used grazing incidence X-ray diffraction to investigate monolayers of the calf lung surfactant extract (CLSE) at the physiological temperatures. The result shows the significant broadening of the GIXD peak and the dramatic decrease in scattered intensity, indicating a radical loss of the long range order among the hydrocarbon chains and the extensive conversion of ordered to disordered structures.

- Apr 2020
A text mining analysis of the climate change literature in industrial ecology
Fazle Rabbi Dayeen, Abhinav S. Sharma, Sybil Derrible. Journal of Industrial Ecology, Volume 24, Issue 2, April 2020, Pages 276-284. https://doi.org/10.1111/jiec.12998.
We used latent Dirichlet allocation (LDA)—a probabilistic approach to retrieve topics from the abstract of over 35,000 publications on industrial ecology to uncover the main topics (consisting of new terms) that naturally emerge from them. The evolution in time of the importance of some emerging topics is then analyzed on the basis of their relative frequency. Overall, a rapid growth in climate change publications is observed.

- Oct 2016
Multi-multifractality, dynamic scaling and neighbourhood statistics in weighted planar stochastic lattice
F.R. Dayeen, M.K. Hassan, Chaos, Solitons & Fractals, Volume 91, October 2016, Pages 228-234, ISSN 0960-0779. http://dx.doi.org/10.1016/j.chaos.2016.06.006.
We show that the block size distribution function in the weighted planar stochastic lattice (WPSL), which is a multifractal and whose dual is a scale-free network, exhibits dynamic scaling. We verify it numerically using the idea of data-collapse. As the WPSL is a space-filling cellular structure, we thought it was worth checking if the Lewis and the Aboav-Weaire laws are obeyed in the WPSL.

- Sept 2014
Self-similarity, Aboav-Weaire’s and Lewis’ laws in weighted planar stochastic lattice
F.R. Dayeen, M.K. Hassan. arXiv:1409.7928v1.
In this article, we checked if the WPSL obeys the Lewis and the Aboav-Weaire laws by running simulation written in C++ programming language. And we find that the mean area $\langle A \rangle_k$ of blocks with $k$ neighbours grow linearly up to $k=8$, and hence the Lewis law is obeyed. However, beyond $k>8$ we find that $\langle A \rangle_k$ grows exponentially to a constant value violating the Lewis law.

- 2020-Present
Analyzing the property of insoluble monolayers at physiological temperature using GIXD (Grazing incident X-ray diffraction).
The primary goals of this research will be elucidating the role of individual molecules in pulmonary surfactant, their cooperation at the molecular scale required for proper lung function, and the design of synthetic surfactant mimics.

- 2019
Building a computational model to identify the emerging topics from scientific literature.
We used latent Dirichlet allocation (LDA)—a probabilistic approach to retrieve topics from the abstract of over 35,000 publications on industrial ecology to uncover the main topics (consisting of new terms) that naturally emerge from them. The evolution in time of the importance of some emerging topics is then analyzed on the basis of their relative frequency. Overall, a rapid growth in climate change publications is observed.

- 2018
DFT+U Simulation of LaNiO3 using python and the Vienna Ab initio Simulation Package (VASP).
We computed the structural property, the correlated electronic structure, and the vacancy energetics of LaNiO3 thin films using computer simulation. In this project Vienna Ab-initio simulation package (VASP) was used to perform the Density Funtional Theory (DFT) plus U calculations on the thin films of LaNiO3.

- 2016
Cause-Effect Pair Detection: A classification based approach.
We attempted to build a classification based approach to solve the cause-effect pair detection problem and thus addresses the importance of attributing causes to effects which is pervasive in almost every aspects of our daily life involving human reasoning and decision making.

- 2014
Application of Aboav-Weaire's and Lewis' laws and calculation of Self-similarity in weighted planar stochastic lattice.
In this study, we show that the block size distribution function in the weighted planar stochastic lattice (WPSL) exhibits dynamic scaling. We also checked if the WPSL obeys the Lewis and the Aboav-Weaire laws by running simulation written in C++ programming language.

- 2012
Analysis of constraint structure of coupling of vector gauge field to a massive tensor field in presence of pseudoscalar and a scalar mass term
A thesis submitted on toward the degree of Master of Science in Theoretical Physics by Fazle Rabbi Dayeen
We consider a model in which vector gauge field is coupled directly to an antisymmetric tensor field in presence of a pseudoscalar and a pure scalar mass term and hence calculate the degrees of freedom.

- 2009
Generating and visualizing the fractal property of Julia-Mandelbrot set using C++ and Gnuplot.
The Julia-Mandelbrot set is the one of the famous object in computational physics and modern mathematics. We developed a C++ code that generates and plot the set by iterating a simple function on the points of the complex plane.

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