Article
Engineering, Industrial
Rafael Amaya-Gomez, Mauricio Sanchez-Silva, Felipe Munoz, Franck Schoefs, Emilio Bastidas-Arteaga
Summary: This study characterizes the main spatial distribution of corrosion defects using the Complete Spatial Randomness assumption under hypothesis testing. It finds that corrosion defects tend to be clustered and slightly repelled from those already detected.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2024)
Article
Mathematics, Applied
Youshan Tao, Michael Winkler
Summary: This study focuses on a parabolic-parabolic-elliptic system as a simplified model for the initial phase of tumor-related angiogenesis. The system features a cascade-like coupling of two chemotaxis processes and a repulsive cross-diffusive mechanism. It is shown that for n-dimensional bounded convex domains with n <= 3, a suitable assumption on the repulsion term parameter ensures global existence of a bounded classical solution.
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS
(2021)
Article
Chemistry, Physical
Guangsheng Zeng, Wei Chen, Sheng Liu, Guangyi Liu
Summary: In the xanthate flotation system, the aggregation of serpentine on sulfide minerals weakens their floatability. While electrostatic attraction was assumed to be the dominant driver for serpentine slimes coating, this study proposes that the hydrophobic interaction between the talc-like cleavage plane of serpentine and the xanthate-hydrophobized surface of sulfide minerals is the dominating factor. Through experiments using optical microscopy, micro-flotation, contact angle, zeta potential, and FT-IR, the aggregation behavior and mechanism of serpentine on pyrite surface were investigated, along with the disaggregation mechanism of HEDP. The findings reveal that the hydrophobic interaction promotes the aggregation between serpentine and pyrite, while the attendance of HEDP prevents their aggregation through electrostatic repulsion.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Huanyu Zhou, Giuseppe Mallia, Nicholas M. Harrison
Summary: The electronic and spintronic properties of monovacancies in freestanding and isotopically compressed graphene were investigated using a hybrid exchange density functional perturbation theory. The relationship between magnetic moment and local distortion was revealed, providing insights into controlling the electronic structure of graphene.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Mathematics, Applied
Johannes Lankeit
Summary: The paper demonstrates that the attraction-repulsion chemotaxis system can exhibit radially symmetric solutions in bounded domains, which may blow up in finite time when attraction dominates over repulsion.
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
(2021)
Article
Mathematics, Applied
Miaoqing Tian, Lili Han, Xiao He, Sining Zheng
Summary: This paper studies the attraction-repulsion chemotaxis system of two-species with two chemical substances. The behavior of solutions is determined by the interactions among diffusion, attraction, repulsion, logistic sources, and nonlinear productions in the system. The paper provides conditions for the global boundedness of solutions.
NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS
(2024)
Article
Physics, Multidisciplinary
F. Leroy, A. El Barraj, F. Cheynis, P. Mueller, S. Curiotto
Summary: Thermal gradients in nanomaterials can induce surface mass transport phenomena. By using low energy electron microscopy, the researchers have observed thermomigration of supercooled Si(111)-1 x 1 advacancy islands under a thermal gradient of 104 K/m. The islands move towards the cold region, indicating that atoms tend to migrate towards lower temperatures. The study also quantified the heat of transport of Si atoms and identified the combined effects of adatom creation and diffusion as contributing factors.
PHYSICAL REVIEW LETTERS
(2023)
Article
Spectroscopy
D. Matthew Sublett Jr, Eszter Sendula, Hector M. Lamadrid, Matthew Steele-MacInnis, Georg Spiekermann, Robert J. Bodnar
Summary: The Raman spectral behavior of N-2, CO2, and CH4 in ternary N-2-CO2-CH4 mixtures was studied, with N-2 showing lower wavenumbers in all mixtures, while CO2 and CH4 exhibited different peak shifts. The relationships between peak positions and mole fractions were found to be more complex for CH4 compared with N-2 and CO2. Additionally, the study extended the relationship between the peak position of N-2 and pressure in ternary N-2-bearing systems to assess similarities in Raman spectral behavior.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Mathematics
Li Xie, Yan Xu
Summary: In this study, we investigate the initial boundary value problems of chemotaxis-Navier-Stokes systems involving double chemosignals. The systems consist of one attractant consumed by the cells themselves and another attractant or repellent produced by the cells themselves. The research reveals that for any properly regular initial data, if the initial total cells mass is below a certain threshold, the corresponding attraction-attraction NavierStokes system possesses a unique global classical solution. This solution is globally bounded and converges exponentially to the spatial equilibrium in the large time limit, under additional smallness assumptions on the initial data. Moreover, the study achieves the global classical solvability and stabilization of the Keller-Segel NavierStokes system and establishes the uniform boundedness and large time behavior of the global classical solution of the associated attraction-repulsion Navier-Stokes system. (c) 2023 Elsevier Inc. All rights reserved.
JOURNAL OF DIFFERENTIAL EQUATIONS
(2023)
Article
Engineering, Environmental
Xinxin Jing, Yichao Wu, Dengjun Wang, Chenchen Qu, Jun Liu, Chunhui Gao, Abdelkader Mohamed, Qiaoyun Huang, Peng Cai, Noha Mohamed Ashry
Summary: This study used quartz crystal microbalance with dissipation monitoring (QCM-D) to investigate the dynamic attachment processes of Pseudomonas aeruginosa PAO1 onto graphene oxide (GO) surfaces under different ionic strengths. The results showed that the highest bacterial attachment occurred at moderate ionic strengths. The extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory and atomic force microscopy (AFM) analysis revealed that strong electrostatic and steric repulsion hindered the bacteria-GO interaction at low ionic strengths, while limited polymer bridging reduced cell attachment at a high ionic strength.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Mathematical & Computational Biology
Ruxi Cao, Zhongping Li
Summary: This paper discusses a quasilinear parabolic-elliptic-elliptic attraction-repulsion system. It proves that solutions with initial mass concentrating enough in a small ball centered at origin will blow up in finite time, under certain conditions. However, the system admits a global bounded classical solution for suitable smooth initial datum.
MATHEMATICAL BIOSCIENCES AND ENGINEERING
(2023)
Article
Biology
Zhihui He, Yingqing Lin, Runguo Wei, Cheng Liu, Dazhi Jiang
Summary: By combining machine learning with an evolutionary algorithm, a new hybrid algorithm is developed to predict cancer driver genes. This algorithm improves prediction accuracy by using the strategies of gravitational kernel and vital few. Experimental results show that the proposed method outperforms six other algorithms in predicting cancer driver genes.
COMPUTERS IN BIOLOGY AND MEDICINE
(2022)
Article
Chemistry, Multidisciplinary
Kuan-Rong Hao, Yang Song, Lizhi Zhang
Summary: Based on first-principles calculations, we identified a series of magnetic adatoms with high structural stability and large magnetic anisotropy energy. The p-type systems, especially Pb and Bi, exhibit giant MAEs up to 157 meV and 313 meV, respectively. The large MAEs are mainly attributed to the orbital hybridization of degenerated p(x/y) orbitals near the Fermi levels, induced by ligand field and significant spin-orbit coupling interaction. Moreover, the robust magnetic anisotropy of individual Pb/Bi adatoms on the graphane surface is confirmed by comparing different magnetic configurations.
Article
Nanoscience & Nanotechnology
Miriam Kosik, Marvin M. Mueller, Karolina Slowik, Garnett Bryant, Andres Ayuela, Carsten Rockstuhl, Marta Pelc
Summary: This study presents a framework for describing electron dynamics in hybrid systems of graphene nanoflakes coupled to adatoms, and investigates the impact of electron tunneling on quantum optical phenomena.
Article
Mathematics, Applied
Guoqiang Ren, Bin Liu
Summary: In this paper, we consider a fully parabolic attraction-repulsion chemotaxis system with logistic source in a three-dimensional bounded domain. We derive explicit formulas for the logistic damping rate and convergence rate, ensuring no blowups and expressing the convergence rate explicitly when certain conditions are met. Our results generalize and improve upon previously known results.
ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK
(2022)
