cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Friedkin-Johnsen Model with Diminishing Competition
Creators: name: Ballotta, Luca
name: Vékássy, Áron
name: Gil, Stephanie
name: Yemini, Michal
Publisher: name: arXiv
Year: 2024
Subjects: subject: Systems and Control (eess.SY)
subject: Multiagent Systems (cs.MA)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This letter studies the Friedkin-Johnsen (FJ) model with diminishing competition, or stubbornness. The original FJ model assumes that each agent assigns a constant competition weight to its initial opinion. In contrast, we investigate the effect of diminishing competition on the convergence point and speed of the FJ dynamics. We prove that, if the competition is uniform across agents and vanishes asymptotically, the convergence point coincides with the nominal consensus reached with no competition. However, the diminishing competition slows down convergence according to its own rate of decay. We study this phenomenon analytically and provide upper and lower bounds on the convergence rate. Further, if competition is not uniform across agents, we show that the convergence point may not coincide with the nominal consensus point. Finally, we evaluate our analytical insights numerically.
description: Copyright (c) 2024 IEEE. Personal use of this material is permitted. However, permission to use this material for any other purposes must be obtained from the IEEE by sending a request to pubs-permissions@ieee.org. Fixed assumption on consensus matrix
A New Non-Inheriting Homogeneous Solution of the Einstein-Maxwell Equations with Cosmological Term
Creators: name: Anderson, I. M.
name: Torre, C. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We find a new homogeneous solution to the Einstein-Maxwell equations with a cosmological term. The spacetime manifold is $R \times S^3$. The spacetime metric admits a simply transitive isometry group $G = R \times SU(2)$ of isometries and is of Petrov type I. The spacetime is geodesically complete and globally hyperbolic. The electromagnetic field is non-null and non-inheriting: it is only invariant with respect to the $SU(2)$ subgroup and is time-dependent in a stationary reference frame.
description: 14 pages
PREDICTIVE MAINTENANCE SCHEME FOR PHASED MISSION SYSTEMS
Creators: name: Srivastava, Preeti Wanti
name: Rani, Satya
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: phased mission system
reliability
Gumbel-Haugaard copula
predictive maintenance
periodic maintenance
mean residual life
cost optimization
cumulative exposure model

description: In both industrial and military fields, many systems are phase mission systems (PMSs) which execute mission composed of different phases in sequence. The structure, failure behaviour, and working condition of such a system may change from phase to phase. Maintenance actions comprising corrective and preventive maintenance schemes studied in the literature are aimed at retaining the maintained system in a proper condition and improving its availability and extending its life. The present paper deals with finding optimal periodic inspection time using multi-objective criteria comprising objectives of minimizing expected maintenance cost incurred due to predictive, breakdown and periodic maintenance of a PMS , and maximizing its expected residual lifetime. The predictive maintenance is condition-based preventive maintenance that anticipates system failures in order to plan timely interventions on the system and hence improve its performance. The dependency is modelled using Gumbel-Haugaard copula. An aircraft flight PMS comprising Taxiing phase, Take-Off phase, Cruising phase and Landing phase has been used to illustrate the method developed.
Dual camera snapshot hyperspectral imaging system via physics informed learning
Creators: name: Xie, Hui
name: Zhao, Zhuang
name: Han, Jing
name: Zhang, Yi
name: Bai, Lianfa
name: Lu, Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Optics (physics.optics)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We consider using the system's optical imaging process with convolutional neural networks (CNNs) to solve the snapshot hyperspectral imaging reconstruction problem, which uses a dual-camera system to capture the three-dimensional hyperspectral images (HSIs) in a compressed way. Various methods using CNNs have been developed in recent years to reconstruct HSIs, but most of the supervised deep learning methods aimed to fit a brute-force mapping relationship between the captured compressed image and standard HSIs. Thus, the learned mapping would be invalid when the observation data deviate from the training data. Especially, we usually don't have ground truth in real-life scenarios. In this paper, we present a self-supervised dual-camera equipment with an untrained physics-informed CNNs framework. Extensive simulation and experimental results show that our method without training can be adapted to a wide imaging environment with good performance. Furthermore, compared with the training-based methods, our system can be constantly fine-tuned and self-improved in real-life scenarios.
Degenerate squeezing in a dual-pumped integrated microresonator: parasitic processes and their suppression
Creators: name: Seifoory, Hossein
name: Vernon, Zachary
name: Mahler, Dylan
name: Menotti, Matteo
name: Zhang, Young
name: Sipe, John E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Using a general Hamiltonian treatment, we theoretically study the generation of degenerate quadrature squeezing in a dual-pumped integrated microring resonator coupled to a waveguide. Considering a dual-pump four-wave mixing configuration in an integrated $\text{Si}_3\text{N}_4$ platform, and following the coupled-mode theory approach, we investigate the effects of parasitic quantum nonlinear optical processes on the generation of squeezed light. Considering five resonance modes in this approach allows us to include the most important four-wave mixing processes involved in such a configuration. We theoretically explore the effects of the pump detunings on different nonlinear processes and show that the effects of some of the parasitic processes are effectively neutralized by symmetrically detuning the two pumps. This yields a significant enhancement in the output squeezing quality without physically changing the structure, but suffers from the trade-off of requiring substantially higher pump power for a fixed target level of squeezing.
ON φ-CONHARMONICALLY FLAT LORENTZIAN PARA-KENMOTSU MANIFOLDS
Creators: name: I.V. Venkateswara Rao
name: S. Sunitha Devi
name: K.L. Sai Prasad
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Lorentzian para-Kenmotsu manifold
Weyl-projective curvature tensor
conformal curvature tensor
Einstein manifold

description: The present paper deals with a class of Lorentzian almost paracontact metric manifolds namely Lorentzian para-Kenmotsu (briefly LP-Kenmotsu) manifolds. We study and have shown that a quasiconformally flat Lorentzian para-Kenmotsu manifold is locally isomorphic with a unit sphere Sn(1). Further it is shown that an LP-Kenmotsu manifold which is φ-conharmonically flat is an η-Einstein manifold with the zero scalar curvature. At the end, we have shown that a φ-projectively flat LPKenmotsu manifold is an Einstein manifold with the scalar curvature r = n(n − 1).
Additional file 1 of Accumulation and regulation of anthocyanins in white and purple Tibetan Hulless Barley (Hordeum vulgare L. var. nudum Hook. f.) revealed by combined de novo transcriptomics and metabolomics
Creators: name: Yao, Xiaohua
name: Yao, Youhua
name: An, Likun
name: Li, Xin
name: Bai, Yixiong
name: Cui, Yongmei
name: Wu, Kunlun
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Figure S1. Expression heatmap of 40 DEGs related to anthocyanin synthesis. Heatmap shows the patterns of differential expression across the 40 DEGs at each stage. Cell colors correspond to the log10 magnitude of the difference in expression level [log10(fold change values + 1)]: redder cells indicate upregulation, and bluer cells indicate downregulation. Figure S2. Gene cluster dendrograms and modules. (A) Gene cluster dendrograms based on TOM-based dissimilarity. (B) Module divisions after dynamic tree cutting. (C) Module divisions after merging similar modules. Different colors indicate different modules.
Measurement and Memory in the Periodically Driven Complex Ginzburg-Landau equation
Creators: name: Mithun, T.
name: Kevrekidis, P. G.
name: Saxena, A.
name: Bishop, A. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In the present work we illustrate that classical but nonlinear systems may possess features reminiscent of quantum ones, such as memory, upon suitable external perturbation. As our prototypical example, we use the two-dimensional complex Ginzburg-Landau equation in its vortex glass regime. We impose an external drive as a perturbation mimicking a quantum measurement protocol, with a given "measurement rate" (the rate of repetition of the drive) and "mixing rate" (characterized by the intensity of the drive). Using a variety of measures, we find that the system may or may not retain its coherence, statistically retrieving its original glass state, depending on the strength and periodicity of the perturbing field. The corresponding parametric regimes and the associated energy cascade mechanisms involving the dynamics of vortex waveforms and domain boundaries are discussed.
Cytocompatible polyion complex gel of poly(Pro-Hyp-Gly) for simultaneous rat bone marrow stromal cell encapsulation
Creators: name: Nurlidar, Farah
name: Mime Kobayashi
name: Terada, Kayo
name: Ando, Tsuyoshi
name: Tanihara, Masao
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: Inorganic Chemistry
subject: Hematology
subject: 60506 Virology

description: Polyion complex (PIC) gel of poly(Pro-Hyp-Gly) was successfully fabricated by simply mixing polyanion and polycation derivatives of poly(Pro-Hyp-Gly), a collagen-like polypeptide. The polyanion, succinylated poly(Pro-Hyp-Gly), and the polycation, arginylated poly(Pro-Hyp-Gly), contain carboxy (pKa = 5.2) and guanidinium (pKa = 12.4) groups, respectively. Mixing the polyanion and the polycation at physiological pH (pH = 7.4) resulted in PIC gel. The hydrogel formation was optimum at an equimolar ratio of carboxy to guanidinium groups, suggesting that ionic interaction is the main determinant for the hydrogel formation. The hydrogel was successfully used for simultaneous rat bone marrow stromal cell encapsulation. The encapsulated cells survived and proliferated within the hydrogel. In addition, the cells exhibited different morphology in the hydrogel compared with cells cultured on a tissue culture dish as a two-dimensional (2D) control. At day one, a round morphology and homogeneous single cell distribution were observed in the hydrogel. In contrast, the cells spread and formed a fibroblast-like morphology on the 2D control. After three days, the cells in the hydrogel maintained their morphology and some of them formed multicellular aggregates, which is similar to cell morphology in an in vivo microenvironment. These results suggest that the PIC gel of poly(Pro-Hyp-Gly) can serve as a cytocompatible three-dimensional scaffold for stem cell encapsulation, supporting their viability, proliferation, and in vivo-like behavior.
Non-uniform random graphs on the plane: A scaling study
Creators: name: Martinez-Martinez, C. T.
name: Mendez-Bermudez, J. A.
name: Rodrigues, Francisco A.
name: Estrada, Ernesto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We consider random geometric graphs on the plane characterized by a non-uniform density of vertices. In particular, we introduce a graph model where $n$ vertices are independently distributed in the unit disc with positions, in polar coordinates $(l,θ)$, obeying the probability density functions $ρ(l)$ and $ρ(θ)$. Here we choose $ρ(l)$ as a normal distribution with zero mean and variance $σ\in(0,\infty)$ and $ρ(θ)$ as an uniform distribution in the interval $θ\in [0,2π)$. Then, two vertices are connected by an edge if their Euclidian distance is less or equal than the connection radius $\ell$. We characterize the topological properties of this random graph model, which depends on the parameter set $(n,σ,\ell)$, by the use of the average degree $\left\langle k \right\rangle$ and the number of non-isolated vertices $V_\times$; while we approach their spectral properties with two measures on the graph adjacency matrix: the ratio of consecutive eigenvalue spacings $r$ and the Shannon entropy $S$ of eigenvectors. First we propose a heuristic expression for $\left\langle k(n,σ,\ell) \right\rangle$. Then, we look for the scaling properties of the normalized average measure $\left\langle \overline{X} \right\rangle$ (where $X$ stands for $V_\times$, $r$ and $S$) over graph ensembles. We demonstrate that the scaling parameter of $\left\langle \overline{V_\times} \right\rangle=\left\langle V_\times \right\rangle/n$ is indeed $\left\langle k \right\rangle$; with $\left\langle \overline{V_\times} \right\rangle \approx 1-\exp(-\left\langle k \right\rangle)$. Meanwhile, the scaling parameter of both $\left\langle \overline{r} \right\rangle$ and $\left\langle \overline{S} \right\rangle$ is proportional to $n^{-γ} \left\langle k \right\rangle$ with $γ\approx 0.16$.
description: 15 pages, 14 figures
Near-horizon microstructure and superradiant instability of black holes
Creators: name: Guo, Rong-Zhen
name: Yuan, Chen
name: Huang, Qing-Guo
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Ultralight bosons, as important candidates of dark matter, can condense around spinning black holes (BHs) to form long-lived ``boson clouds'' due to superradiance instability. The boson-BH system can be observed through gravitational wave detection and may become a new window to find traces of ultralight bosons. In this letter we explore the effects on the superradiant instability of BHs from the near-horizon microstructure. By introducing the reflection parameter near a BH horizon, we derived analytical results on the corrections to both energy levels of bosonic cloud and its characteristic frequencies of superradiance instability. Our results imply that the evolution of a boson-BH system and gravitational waves it emits would be influenced by the near-horizon physics of a BH.
description: 5 pages
Machine learning modeling of family wide enzyme-substrate specificity screens
Creators: name: Goldman, Samuel
name: Das, Ria
name: Yang, Kevin K.
name: Coley, Connor W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biomolecules (q-bio.BM)
subject: Machine Learning (cs.LG)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Biocatalysis is a promising approach to sustainably synthesize pharmaceuticals, complex natural products, and commodity chemicals at scale. However, the adoption of biocatalysis is limited by our ability to select enzymes that will catalyze their natural chemical transformation on non-natural substrates. While machine learning and in silico directed evolution are well-posed for this predictive modeling challenge, efforts to date have primarily aimed to increase activity against a single known substrate, rather than to identify enzymes capable of acting on new substrates of interest. To address this need, we curate 6 different high-quality enzyme family screens from the literature that each measure multiple enzymes against multiple substrates. We compare machine learning-based compound-protein interaction (CPI) modeling approaches from the literature used for predicting drug-target interactions. Surprisingly, comparing these interaction-based models against collections of independent (single task) enzyme-only or substrate-only models reveals that current CPI approaches are incapable of learning interactions between compounds and proteins in the current family level data regime. We further validate this observation by demonstrating that our no-interaction baseline can outperform CPI-based models from the literature used to guide the discovery of kinase inhibitors. Given the high performance of non-interaction based models, we introduce a new structure-based strategy for pooling residue representations across a protein sequence. Altogether, this work motivates a principled path forward in order to build and evaluate meaningful predictive models for biocatalysis and other drug discovery applications.
VILFRD_algorithm_files
Creators: name: Murphy, Kelley
Publisher: name: Zenodo
Year: 2023

description: This folder coincides with the manuscript in the American Meteorological Society (AMS) Journal of Applied Meteorology and Climatology (JAMC) titled: "Automated and Objective Thunderstorm Identification and Tracking Using Geostationary Lightning Mapper (GLM) Data" by Murphy et al. 2023. It provides the two VILFRD algorithms to be run with WDSSII for identifying storms. The "w2vilfrd" algorithm is used for all VILFRD identification methods, EXCEPT for lightning only, which is where "w2vilfrd_noVIL" is used.
PROCESS CAPABILITY ANALYSIS FOR NON NORMAL DATA BASED ON BOX-COX TRANSFORMATION THROUGH TESTS OF GOODNESS OF FIT
Creators: name: J. Krishnan
name: R. Vijayaraghavan
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Goodness of fit tests
Box-Cox Transformation
Asymmetric
MLE
Weibull distribution
Six sigma

description: Process capability analysis is an effective and efficient tool for quality assurance. When the distribution of the underlying quality characteristics is not normal, modifications of the basic process capability indices are required. Literature in process control provides avenues to resolve the issue of non-normality and data transformation is one of the approaches frequently applied in practice. Primarily the Box – Cox transformation (BCT) is employed to transform the non normal data into normal data which originally utilizes the method of maximum likelihood estimation (MLE) to find the single transformation parameter λ. There are alternative methods to estimate the optimal parametric value λ using goodness of fit tests rather using MLE method. In order to bring improved estimates, this paper makes a fresh attempt to estimate process capability analysis (PCA) using transformed data through different goodness of fit tests. The simulation study uses variety of asymmetric behaviors from a Weibull distribution generating a random sample of 100 data points to find the best goodness of fit test for better process capability estimates that are compared to the standard of six sigma results for non-normal data. Final result shows that Shapiro-Wilk's (SW) and Artificial Covariate (AC) methods are performing well when compared to the method of MLE. Minitab software and R programming language were utilized for data simulation and analysis.
Entropy of induced maps of regular curves homeomorphisms
Creators: name: Daghar, Aymen
name: Naghmouchi, Issam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Let $f:X\to X$ be a self homeomorphism of a continuum $X$, we show that the topological entropy of the induced system $(2^X,2^f)$ is infinite provided that $X\setminus Ω(f)$ is not empty. If furthermore $X$ is a regular curve then it is shown that $(2^X,2^f)$ has infinite topological entropy if and only if $X\setminus Ω(f)$ is not empty. Moreover we prove for the induced system $(C(X),C(f))$ the equivalence between the following properties: (i) zero topological entropy; (ii) there is no Li-Yorke pair and (iii) for any periodic subcontinnum $A$ of $X$ and any connected component $C$ of $X\setminus Ω(f)$, $C\subset A$ if $A\cap C\neq \emptyset$. In particular, the topological entropy of either $(2^X,2^f)$ or $(C(X),C(f))$ has only two possible values $0$ or $\infty$. At the end, we give an example of a pointwise periodic rational curve homeomorphism $F:Y\to Y$ with infinite topological entropy induced map $C(F)$.
The $u$-plane integral, mock modularity and enumerative geometry
Creators: name: Aspman, Johannes
name: Furrer, Elias
name: Korpas, Georgios
name: Ong, Zhi-Cong
name: Tan, Meng-Chwan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We revisit the low-energy effective $U(1)$ action of topologically twisted $\mathcal N=2$ SYM theory with gauge group of rank one on a generic oriented smooth 4-manifold $X$ with nontrivial fundamental group. After including a specific new set of $\mathcal Q$-exact operators to the known action, we express the integrand of the path integral of the low-energy $U(1)$ theory as an anti-holomorphic derivative. This allows us to use the theory of mock modular forms and indefinite theta functions for the explicit evaluation of correlation functions of the theory, including but not restricted to those that physically reproduce Donaldson invariants, thus facilitating the computations compared to previously used methods. As an explicit check of our results, we compute the path integral for the product ruled surfaces $X=Σ_g \times \mathbb{CP}^1$ for the reduction on either factor and compare the results with existing literature. In the case of reduction on the Riemann surface $Σ_g$, via an equivalent topological A-model on $\mathbb{CP}^1$, we will be able to express the generating function of genus zero Gromov-Witten invariants of the moduli space of flat rank one connections over $Σ_g$ in terms of an indefinite theta function, whence we would be able to make concrete numerical predictions of these enumerative invariants in terms of modular data, thereby allowing us to derive results in enumerative geometry from number theory.
description: 31 pages + appendices. Minor changes to title, abstract, introduction and section 5 after reviewer comments. To appear in Lett.Math.Phys
PROFIT ANALYSIS OF REPAIRABLE JUICE PLANT
Creators: name: , Rahul
name: Mohit Yadav
name: Kumar, Hemant
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Reliability measures
juice plant
evaporation and pasteurization

description: Juice is a non-fermented beverage that is obtained by squeezing fruits to increase immunity. Generally, juice contains calcium, vitamin, iron, etc. to give the refresh tests. There are multiple steps to store the juice at large levels such as storing, grinding pasteurization, etc. In this paper, the performance and reliability measures of a juice plant are discussed. The juice plant has three distinct units. Unit A has washing and storage tank, unit B has grinding, blending, evaporation and pasteurization, and unit C has bottling, labeling and packing units. If any unit partially fails then the system works to a limited extent. A technician is always available to repair the failed unit. The system fails when one unit completely fails. In this paper, the failure time and repair time follow general distributions. The regenerative point graphical technique is used to explore the reliability measures.
Quantum Entanglement and Axion Physics
Creators: name: Nicolaidis, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The axion particle is the outcome of the proposed Peccei-Quinn mechanism for solving the strong CP problem. Axion is also a popular dark matter candidate. Thus there is an increased interest in establishing its existence. Axions couple to two photons and most experiments search for the transition of an axion into a photon, in the presence of a magnetic field. In our study we examine the coupling of the axion into a pair of entangled photons. The presence of a magnetic field changes the polarization correlations of the entagled photons, thus offering an unambiguous signature for axion existence
description: 4 pages
One-dimensional force-free numerical simulations of Alfven waves around a spinning black string
Creators: name: Koide, Shinji
name: Noda, Sousuke
name: Takahashi, Masaaki
name: Nambu, Yasusada
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We performed one-dimensional force-free magnetodynamic numerical simulations of the propagation of Alfven waves along magnetic field lines around a spinning black-hole-like object, the Banados--Teitelboim--Zanelli black string, to investigate the dynamic process of wave propagation and energy transport with Alfven waves. We considered axisymmetric and stationary magnetosphere and perturbed the background magnetosphere to obtain the linear wave equation for the Alfven wave mode. The numerical results show that the energy of Alfven waves monotonically increases as the waves propagate outwardly along the rotating curved magnetic field line around the ergosphere, where energy seems not to be conserved, in the case of energy extraction from the black string by the Blandford--Znajek mechanism. The apparent breakdown of energy conservation suggests the existence of an additional wave induced by the Alfven wave. Considering the additional fast magnetosonic wave induced by the Alfven wave, the energy conservation is recovered. Similar relativistic phenomena, such as the amplification of Alfven waves and induction of fast magnetosonic waves, are expected around a spinning black hole.
description: 27 pages, 10 figures
A ruthenium(II)-trithiacyclononane curcuminate complex: Synthesis, characterization, DNA-interaction, and cytotoxic activity
Creators: name: Henriques, Magda Carvalho
name: Faustino, Maria Amparo F.
name: Silva, Artur M. S.
name: Felgueiras, Juliana
name: Fardilha, Margarida
name: Braga, Susana Santos
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: The coordination of ruthenium(II) complexes to anionic oxygen-based donors are very rare. This study describes a simple, one-pot method for obtaining [ruthenium(II)(trithiacyclononane)(curcumin)(S-DMSO)]Cl (1) in 37% yield. The structural characterization of complex 1 by elemental analysis, FT-IR, 1-D and 2-D NMR, ESI+-MS as well as UV–vis and fluorescence spectroscopies are presented. The DNA-melting temperature (Tm) assay shows that salmon sperm DNA (smDNA) in the presence of complex 1 has a higher melting temperature, with ΔTm = 7.4 °C, while in the presence of curcumin the melting temperature remains unaltered. The in vitro cytotoxic activities of curcumin and complex 1 were investigated using the tumor human prostate cell line, PC-3, and the healthy cell line, PNT-2. Complex 1 is innocuous toward normal prostate epithelial cells and, whereas curcumin is toxic, with inhibition rates of ca. 35 and 65% at 50 and 80 μM, respectively. On the tumor cell line PC-3, complex 1 did not cause viability changes, whereas curcumin exhibited dose-dependent inhibition, with ca. 73% inhibition at the highest concentration tested, i.e. 80 μM. This study suggests that coordination with the trithiacyclononane ruthenium(II) scaffold stabilizes the photochemical properties of curcumin and strongly changes its biologic activity.
Classical Density Functional Theory in the Canonical Ensemble
Creators: name: Lutsko, James F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Classical density functional theory for finite temperatures is usually formulated in the grand-canonical ensemble where arbitrary variations of the local density are possible. However, in many cases the systems of interest are closed with respect to mass, e.g. canonical systems with fixed temperature and particle number. Although the tools of standard, grand-canonical density functional theory are often used in an ad hoc manner to study closed systems, their formulation directly in the canonical ensemble has so far not been known. In this work, the fundamental theorems underlying classical DFT are revisited and carefully compared in the two ensembles showing that there are only trivial formal differences. The practicality of DFT in the canonical ensemble is then illustrated by deriving the exact Helmholtz functional for several systems: the ideal gas, certain restricted geometries in arbitrary numbers of dimensions and finally a system of two hard-spheres in one dimension (hard rods) in a small cavity. Some remarkable similarities between the ensembles are apparent even for small systems with the latter showing strong echoes of the famous exact of result of Percus in the grand-canonical ensemble.
description: Added references to some prior work
REGULARITY OF ALTERNATE QUADRA SUBMERGING POLAR FUZZY GRAPH AND ITS APPLICATION
Creators: name: Anthoni Amali A.
name: J. Jesintha Rosline
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Regular AQSP fuzzy soft graph
Totally regular
Perfectly regular AQSP fuzzy soft graph
Alternate Quadra Submerging level of confidence

description: Fuzzy soft sets and graphs are invented to solve uncertain problems in the field of Applied mathematics. It is a general mathematical tool introduced with many parameters to model the vagueness of the changing world. The insight learning of the AQSP fuzzy soft graphs paved the way to discover the extension of the AQSP fuzzy soft graph. In this research article we introduce the Regularity of AQSP fuzzy soft graph with definitions, theorems, properties, and real-life applications. The aim of this invention is mainly to obtain the parametric values in submerging level of confidence [-0.5, 0.5] ⊂ [-1,1]. The scope of this new AQSP fuzzy soft graph is to solve the imprecise problems in the field of Mathematical Engineering, Bio Mathematics, Economics, Medical Science, Artificial Intelligence and Machine learning. The regularity of AQSP fuzzy soft graph is combined with the concepts of regular, totally regular, and perfectly regular. The application of this new graph is developed for governing of the women safety vehicle network in different spots with membership submerging values. The future extension can be applied in Approximate reasoning, Mathematical psychology, Decision making for medical diagnosis.
Benign synthesis of quinolinecarboxamide ligands, H2bqbenzo and H2bqb and their Pd(II) complexes: X-ray crystal structure, electrochemical and antibacterial studies
Creators: name: Soraia Meghdadi
name: Amirnasr, Mehdi
name: Kiani, Mahsa
name: Tirani, Farzaneh Fadaei
name: Bagheri, Maryam
name: Schenk, Kurt Job
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences

description: Two carboxamide ligands, H2bqbenzo {3,4-bis(2-quinolinecarboxamido)benzophenone} and H2bqb {N,N′-bis[(2-quinolinecarboxamide)-1,2-benzene]}, have been prepared using tetrabutylammonium bromide as an environmentally benign reaction medium. Two new Pd(II) complexes, [PdII(bqbenzo)] (1) and [PdII(bqb)] (2), have been synthesized, characterized, and their structures determined by single crystal X-ray diffraction. The di-anionic ligands, bqbenzo2− and bqb2−, are coordinated via two Namide atoms and the nitrogens of the two quinoline rings, with Pd−Namide quinoline bond lengths. The geometry around palladium(II) in both complexes is distorted square planar. The electrochemical behaviors of the ligands and their Pd(II) complexes have been investigated by cyclic voltammetry in DMF. An irreversible PdII/I reduction is observed at −1.06 V for 1 and at −1.177 V for 2, indicating the influence of the R substituent on the central phenyl ring of carboxamide ligands on the PdII/I reduction potential. The ligands and palladium complexes were also screened for in vitro antibacterial activity. The Pd(II) complexes show strong biological activity against S.typhi and E.coli as Gram −ve and B.cereus and S.aureus as Gram +ve bacteria comparable to the antibiotic penicillin. The antibacterial results also reveal that coordination of Pd(II) significantly improves the activity.
The Stellar "Snake" I: Whole Structure and Properties
Creators: name: Wang, Fan
name: Tian, Hai-Jun
name: Qiu, Dan
name: Xu, Qi
name: Fang, Min
name: Tian, Hao
name: Li, Di
name: Bird, Sarah
name: Shi, Jian-Rong
name: Fu, Xiao-Ting
name: Liu, Gao-Chao
name: Cui, Sheng
name: Zhang, Yong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: To complement our previous discovery of the young snake-like structure in the solar neighborhood and reveal the structure's full extent, we build two samples of stars within the Snake and its surrounding territory from {\tt Gaia EDR3}. With the friends-of-friends algorithm, we identify 2694 and 9615 Snake member candidates from the two samples. Thirteen open clusters are embedded in these member candidates. By combining the spectroscopic data from multiple surveys, we investigate the comprehensive properties of the candidates and find that they \thj{are very likely to} belong to one sizable structure, since most of the components are well bridged in their spatial distributions, and follow a single stellar population with an age of $30-40$\,Myr and solar metallicity. This sizable structure is best explained as hierarchically primordial, and probably formed from a filamentary giant molecular cloud with unique formation history in localized regions. To analyze the dynamics of the Snake, we divide the structure into five groups according to their tangential velocities; we find that the groups are expanding at a coherent rate ($κ_X\sim3.0\,\times10^{-2}\,\rm km\,s^{-1}\,pc^{-1}$) along the length of the structure ($X$-direction). \thj{The corresponding expansion age ($τ\sim33$\,Myr) is highly consistent with the age of the Snake}. With over ten thousand member stars, the Snake is an ideal laboratory to study nearby coeval stellar formation, stellar physics, and environmental evolution over a large spatial extent.
description: 18 pages, 13 figures, 1 table, submitted to MNRAS (revised according to the referee's comments)
RECENT DEVELOPMENTS IN THE COMPUTATION OF THE ROCOF OF MULTI-STATE SYSTEMS AND ITS APPLICATIONS
Creators: name: D’Amico, Guglielmo
name: Gismondi, Fulvio
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Markov processes
semi-Markov processes
reliability
applications

description: This paper reviews several theoretical works on the computation of the Rate of Occurrence of Failure (ROCOF) for general multi-state random systems, focusing on recent generalizations. The discussion begins by defining the ROCOF for a Markov process and discussing the main results achieved in the literature, then moves towards the richer framework represented by semi-Markov systems. The paper discusses complications that arise when extending the ROCOF to higher orders so that a measure of the association of failures in time can be obtained. The work then analyzes possible modifications in terms of a conditional version of the ROCOF, which is of special interest in applications. The findings are illustrated by a numerical example from reliability, and the broad applicability is demonstrated by a discussion of different applications in other domains.
The role of neutral hydrogen in setting the abundances of molecular species in the Milky Way's diffuse interstellar medium. I. Observational constraints from ALMA and NOEMA
Creators: name: Rybarczyk, Daniel R.
name: Stanimirovic, Snezana
name: Gong, Munan
name: Babler, Brian
name: Murray, Claire E.
name: Gerin, Maryvonne
name: Winters, Jan Martin
name: Luo, Gan
name: Dame, T. M.
name: Steffes, Lucille
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have complemented existing observations of HI absorption with new observations of HCO$^+$, C$_2$H, HCN, and HNC absorption from the Atacama Large Millimeter/submillimeter Array (ALMA) and the Northern Extended Millimeter Array (NOEMA) in the direction of 20 background radio continuum sources with $4^\circ \leq |b| \leq 81^\circ$ to constrain the atomic gas conditions that are suitable for the formation of diffuse molecular gas. We find that these molecular species form along sightlines where $A_V \gtrsim 0.25$, consistent with the threshold for the HI-to-H$_2$ transition at solar metallicity. Moreover, we find that molecular gas is associated only with structures that have an HI optical depth $> 0.1$, a spin temperature $< 80$ K, and a turbulent Mach number $\gtrsim 2$. We also identify a broad, faint component to the HCO$^+$ absorption in a majority of sightlines. Compared to the velocities where strong, narrow HCO$^+$ absorption is observed, the HI at these velocities has a lower cold neutral medium (CNM) fraction and negligible CO emission. The relative column densities and linewidths of the different molecular species observed here are similar to those observed in previous experiments over a range of Galactic latitudes, suggesting that gas in the solar neighborhood and gas in the Galactic plane are chemically similar. For a select sample of previously-observed sightlines, we show that the absorption line profiles of HCO$^+$, HCN, HNC, and C$_2$H are stable over periods of $\sim 3$ years and $\sim 25$ years, likely indicating that molecular gas structures in these directions are at least $\gtrsim 100$ AU in size
description: 31 pages, 12 figures, 8 tables. Accepted to ApJ
Etude de la variation du module complexe des enrobés bitumineux sous chargement cyclique
Creators: name: Riahi, Ebrahim
name: Allou, Fatima
name: Botella, Ramon
name: Ulmet, Laurent
name: Tehrani, Fateh
name: Absi, Joseph
name: Dubois, Frédéric
name: Petit, Christophe
name: Perez-Jimenez, Félix E.
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Ce travail s’intéresse à l’étude des phénomènes secondaires tels que l’auto-échauffement et la thixotropie lors de l’essai de fatigue en traction-compression sur les matériaux bitumineux. Une modélisation thermomécanique hétérogène est utilisée pour quantifier la variation du module complexe du béton bitumineux due à l’auto-échauffement. Les résultats de la modélisation aux différentes températures montrent que l’auto-échauffement peut expliquer une partie de la variation réversible du module complexe lors de la première phase de l’essai de fatigue. L’existence d’autres phénomènes réversibles tels que la thixotropie ou l’autoréparation peuvent être à l’origine de cet écart. Étant donné que le comportement du bitume est à l’origine de ces phénomènes, la même étude a été réalisée sur le bitume pur. Les résultats obtenus montrent que, contrairement au béton bitumineux, l’échauffement peut expliquer la variation du module complexe avec une bonne précision. Il semble que les variations du module complexe du béton bitumineux sont plus liées à l’hétérogénéité du matériau.
description: Academic Journal of Civil Engineering, Vol 34 No 1 (2016): Special Issue - RUGC 2016 Liège
Additional file 2 of Accumulation and regulation of anthocyanins in white and purple Tibetan Hulless Barley (Hordeum vulgare L. var. nudum Hook. f.) revealed by combined de novo transcriptomics and metabolomics
Creators: name: Yao, Xiaohua
name: Yao, Youhua
name: An, Likun
name: Li, Xin
name: Bai, Yixiong
name: Cui, Yongmei
name: Wu, Kunlun
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2: Table S1. Abundance of Anthocyanin Compounds in the Two Hulless Barley Varieties, Nierumuzha (PC1–PC3) and Kunlun10 (WC1–WC3), at Three Stages of Seed Development.
An Energy Conserving Vlasov Solver That Tolerates Coarse Velocity Space Resolutions: Simulation of MMS Reconnection Events
Creators: name: Allmann-Rahn, Florian
name: Lautenbach, Simon
name: Grauer, Rainer
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Computational Physics (physics.comp-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Vlasov solvers that operate on a phase-space grid are highly accurate but also numerically demanding. Coarse velocity space resolutions, which are unproblematic in particle-in-cell (PIC) simulations, can lead to numerical heating or oscillations in standard continuum Vlasov methods. We present a new dual Vlasov solver which is based on an established positivity preserving advection scheme for the update of the distribution function and an energy conserving partial differential equation solver for the kinetic update of mean velocity and temperature. The solvers work together via moment fitting during which the maximum entropy part of the distribution function is replaced by the solution from the partial differential equation solver. This numerical scheme makes continuum Vlasov methods competitive with PIC methods concerning computational cost and enables us to model large scale reconnection in Earth's magnetosphere with a fully kinetic continuum method. The simulation results agree well with measurements by the MMS spacecraft.
description: 17 pages, 6 figures
Extreme Weather Variability on Hot Rocky Exoplanet 55 Cancri e Explained by Magma Temperature-Cloud Feedback
Creators: name: Loftus, Kaitlyn
name: Luo, Yangcheng
name: Fan, Bowen
name: Kite, Edwin S.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Observations of the ultra-short period rocky exoplanet 55 Cancri e (55 Cnc e) indicate that the planet's dayside infrared radiation fluctuates by a factor of at least six on sub-weekly timescales, for unknown reasons. We propose a feedback mechanism where increased reflective clouds cool surface magma, subsequently reducing cloud formation, which may offer a potential explanation for these phenomena. In this mechanism, under less cloudy conditions, stellar radiation heats the surface magma, causing it to release more silicate vapor, which then condenses to form reflective clouds. Once formed, these clouds reduce stellar insolation at the surface, leading to surface cooling, which in turn reduces vapor supply, decreasing cloudiness. A time lag between the temperature increase of surface magma and the subsequent increase in cloudiness (likely due to lagged atmospheric transport of cloud-forming vapor) enables self-sustained oscillations in surface temperature and cloud reflectivity. These oscillations manifest as variations in both the emitted thermal radiation and the reflected stellar radiation, causing variability in secondary eclipse depths across different wavelengths without significantly affecting the transit depth. Using a simple model, we find that diverse planetary parameters can reproduce the observations. Additionally, we demonstrate that secondary eclipse depths at different wavelengths can oscillate out of phase, consistent with recent observations by the James Webb Space Telescope. Finally, we discuss observational strategies to test this proposed mechanism on 55 Cancri e. If confirmed, observable ocean-atmosphere dynamics on exoplanets would open a new window into the composition, evolution, and fate of rocky planet volatiles.
description: Authors Luo and Loftus contributed equally. 17 pages, 3 figures, 2 tables. Associated code at https://github.com/kaitlyn-loftus/lava-limits
A ruthenium(II)-trithiacyclononane curcuminate complex: Synthesis, characterization, DNA-interaction and cytotoxic activity
Creators: name: Henriques, Magda Carvalho
name: Faustino, Maria Amparo F.
name: Silva, Artur M. S.
name: Felgueiras, Juliana
name: Fardilha, Margarida
name: Braga, Susana Santos
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: The coordination of ruthenium(II) complexes to anionic oxygen-based donors is very rare. This study describes a simple, one-pot method for obtaining [ruthenium(II)(trithiacyclononane)(curcumin)(S-DMSO)]Cl (1) in 37% yield. The structural characterization of complex 1 by elemental analysis, FT-IR, 1-D and 2-D NMR, ESI+-MS as well as UV-vis and fluorescence spectroscopies is presented. The DNA-melting temperature (Tm) assay shows that salmon sperm DNA (smDNA) in the presence of complex 1 has a higher melting temperature, with ΔTm = 7.4 °C, while in the presence of curcumin the melting temperature remains unaltered. The in vitro cytotoxic activities of curcumin and complex 1 were investigated using the tumor human prostate cell line, PC-3, and the healthy cell line, PNT-2. Complex 1 is innocuous towards normal prostate epithelial cells and, whereas curcumin is toxic, with inhibition rates of ca. 35% and 65% at 50 and 80 μM, respectively. On the tumor cell line PC-3, complex 1 did not cause viability changes whereas curcumin exhibited dose-dependent inhibition, with ca. 73% inhibition at the highest concentration tested, i.e. 80 μM. This study suggests that coordination with the trithiacyclononane ruthenium(II) scaffold stabilizes the photochemical properties of curcumin and strongly changes its biologic activity.