cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Innate Dynamics and Identity Crisis of a Metal Surface Unveiled by Machine Learning of Atomic Environments
Creators: name: Cioni, Matteo
name: Polino, Daniela
name: Rapetti, Daniele
name: Pesce, Luca
name: Piane, Massimo Delle
name: Pavan, Giovanni M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Metals are traditionally considered hard matter. However, it is well known that their atomic lattices may become dynamic and undergo reconfigurations even well-below the melting temperature. The innate atomic dynamics of metals is directly related to their bulk and surface properties. Understanding their complex structural dynamics is thus important for many applications but is not easy. Here we report deep-potential molecular dynamics simulations allowing to resolve at atomic-resolution the complex dynamics of various types of copper (Cu) surfaces, used as an example, near the Hüttig ($\sim1/3$ of melting) temperature. The development of a deep neural network potential trained on DFT calculations provides a dynamically-accurate force field that we use to simulate large atomistic models of different Cu surface types. A combination of high-dimensional structural descriptors and unsupervised machine learning allows identifying and tracking all the atomic environments (AEs) emerging in the surfaces at finite temperatures. We can directly observe how AEs that are non-native in a specific (ideal) surface, but that are instead typical of other surface types, continuously emerge/disappear in that surface in relevant regimes in dynamic equilibrium with the native ones. Our analyses allow estimating the lifetime of all the AEs populating these Cu surfaces and to reconstruct their dynamic interconversions networks. This reveals the elusive identity of these metal surfaces, which preserve their identity only in part and in part transform into something else in relevant conditions. This also proposes a concept of "statistical identity" for metal surfaces, which is key for understanding their behaviors and properties.
Cognitive Forwarding Control in Wireless Ad-Hoc Networks with Slow Fading Channels
Creators: name: Hakami, Vesal
name: Dehghan, Mehdi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We propose a decentralized stochastic control solution for the broadcast message dissemination problem in wireless ad hoc networks with slow fading channels. We formulate the control problem as a dynamic robust game which is well justified by two key observations; first, the shared nature of the wireless medium which inevitably cross-couples the nodes' forwarding decisions, thus binding them together as strategic players; second, the stochastic dynamics associated with the link qualities which renders the transmission costs noisy, thus motivating a robust formulation. Given the non stationarity induced by the fading process, an online solution for the formulated game would then require an adaptive procedure capable of both convergence to and tracking strategic equilibria as the environment changes. To this end, we deploy the strategic and non stationary learning algorithm of regret tracking, the temporally adaptive variant of the celebrated regret matching algorithm, to guarantee the emergence and active tracking of the correlated equilibria in the dynamic robust forwarding game. We also make provision for exploiting the channel state information, when available, to enhance the convergence speed of the learning algorithm by conducting an accurate transmission cost estimation. This cost estimate can basically serve as a model which spares the algorithm from extra action exploration, thus rendering the learning process more sample efficient. Simulation results reveal that our proposed solution excels in terms of both the number of transmissions and load distribution while also maintaining near perfect delivery ratio, especially in dense crowded environments.
description: 29 pages, 9 figures, 2 tables. Wireless Networks (Springer), Vol. XX, No. XX, 2015
The impact of biological products on certain biochemical characteristics of tomato fruits
Creators: name: Zamana, Svetlana P.
name: Shapovalov, Dmitry A.
name: T. D. Kondratyeva
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: organic agriculture
biological products
tomatoes
beta-carotene
lycopene
sugar

description: This article shows the results of measuring the beta-carotene, lycopene, ascorbic acid and sugar levels, acidity and other indicators in tomato fruits grown using Organic and Double Roots, biological products manufactured by Bioelements Ltd (York, UK) and containing spore-forming soil bacilli, nitrogen-fixing bacteria and mycorrhizal fungi. The products are certified for use in organic agriculture by the Soil Association (UK). The research results demonstrate that the use of these biological products contributes to an increase in the content of powerful antioxidants (lycopene and beta-carotene) and sugar in tomato fruits; such indicators as taste index, dry matter content, and mineral content have also increased.
Asset Ownership and Contractibility of Interaction
Creators: name: Roider, Andreas
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 330 Wirtschaft

description: In a property-rights framework, I study how organizational form and quantity contracts interact in generating investment incentives. The model nests standard property-rights and hold-up models as special cases. I admit general message-dependent contracts but provide conditions under which noncontingent contracts are optimal. First, the article contributes to the foundation of the property-rights theory: I characterize under which circumstances its predictions are correct when trade is contractible. Second, I study how the optimal use of the incentive instruments depends on the environment. Finally, the model offers a new perspective on the classic Fisher Body case and produces implications that are empirically testable.
Supplementary Information from Phenotypic plasticity determines differences between the skulls of tigers from mainland Asia
Creators: name: Cooper, David M.
name: Yamaguchi, Nobuyuki
name: Macdonald, David W.
name: Nanova, Olga G.
name: Yudin, Viktor G.
name: Dugmore, Andrew J.
name: Kitchener, Andrew C.
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: 60301 Animal Systematics and Taxonomy
subject: 60310 Plant Systematics and Taxonomy

description: Measurement and analysis procedures, and extended acknowledgements
First experimental constraints on the disformally coupled Galileon model
Creators: name: Neveu, J.
name: Ruhlmann-Kleider, V.
name: Astier, P.
name: Besançon, M.
name: Conley, A.
name: Guy, J.
name: Möller, A.
name: Palanque-Delabrouille, N.
name: Babichev, E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Galileon model is a modified gravity model that can explain the late-time accelerated expansion of the Universe. In a previous work, we derived experimental constraints on the Galileon model with no explicit coupling to matter and showed that this model agrees with the most recent cosmological data. In the context of braneworld constructions or massive gravity, the Galileon model exhibits a disformal coupling to matter, which we study in this paper. After comparing our constraints on the uncoupled model with recent studies, we extend the analysis framework to the disformally coupled Galileon model and derive the first experimental constraints on that coupling, using precise measurements of cosmological distances and the growth rate of cosmic structures. In the uncoupled case, with updated data, we still observe a low tension between the constraints set by growth data and those from distances. In the disformally coupled Galileon model, we obtain better agreement with data and favour a non-zero disformal coupling to matter at the $2.5σ$ level. This gives an interesting hint of the possible braneworld origin of Galileon theory.
description: 9 pages, 6 figures, updated version
Degradation of natural complexes under exposure to erosion
Creators: name: Dontsov Alexander Vladimirovich
name: Vershinin Valentin Valentinovich
name: Gostischev, Dmitry Petrovich
name: Lepekhin, Pavel Pavlovich
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: Natural-territorial complex
agricultural landscape
erosion
geosystem
landscape
degradation
ecosystem

description: Analyzing the theoretical and practical aspects of studying changes in natural territorial complexes, the authors conclude that the anthropocentric paradigm has a negative impact on the use of agricultural landscapes. It is proposed to consider the interpretation of the term "erosion" not only as a process of destruction, but also as a process of accumulation and transformation of energy in ecosystems. In this regard, recommendations are proposed to change the methodological approaches to the study of the erosion process and its consequences.
Stacking domain morphology in epitaxial graphene on silicon carbide
Creators: name: de Jong, Tobias A.
name: Visser, Luuk
name: Jobst, Johannes
name: Tromp, Ruud M.
name: van der Molen, Sense Jan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Terrace-sized, single-orientation graphene can be grown on top of a carbon buffer layer on silicon carbide by thermal decomposition. Despite its homogeneous appearance, a surprisingly large variation in electron transport properties is observed. Here, we employ Aberration-Corrected Low-Energy Electron Microscopy (AC-LEEM) to study a possible cause of this variability. We characterize the morphology of stacking domains between the graphene and the buffer layer of high-quality samples. Similar to the case of twisted bilayer graphene, the lattice mismatch between the graphene layer and the buffer layer at the growth temperature causes a moiré pattern with domain boundaries between AB and BA stackings. We analyze this moiré pattern to characterize the relative strain and to count the number of edge dislocations. Furthermore, we show that epitaxial graphene on silicon carbide is close to a phase transition, causing intrinsic disorder in the form of co-existence of anisotropic stripe domains and isotropic trigonal domains. Using adaptive geometric phase analysis, we determine the precise relative strain variation caused by these domains. We observe that the step edges of the SiC substrate influence the orientation of the domains and we discuss which aspects of the growth process influence these effects by comparing samples from different sources.
Features of landscapes geojekosistema klinsko-dmitrovskaya ridge within Moscow region
Creators: name: Lukianova Tatyana, S.
name: Shirokova Vera, A.
name: Khutorova Alla, O.
name: Vershinin Valentin, V.
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: history of landscapes
Klinsko-Dmitrovskaya Ridge
transformation of natural vegetation
the influence of human

description: The article is devoted to the history of landscapes Klinsko-Dmitrovskaya Ridge and transform it into the present. Considered a brief change of topography and the transformation of natural vegetation on it. Provides an overall picture of the landscape changes under the influence of human.
Mitigation of the onset of hosing in the linear regime through plasma frequency detuning
Creators: name: Moreira, Mariana
name: Muggli, Patric
name: Vieira, Jorge
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The hosing instability poses a feasibility risk for plasma-based accelerator concepts. We show that the growth rate for beam hosing in the linear regime (which is relevant for concepts that use a long driver) is a function of the centroid perturbation wavelength. We demonstrate how this property can be used to damp centroid oscillations by detuning the plasma response sufficiently early in the development of the instability. We also develop a new theoretical model for the early evolution of hosing. These findings have implications for the general control of an instability's growth rate.
description: 5 pages (+ 4 pages of supplemental material), 4 figures (+ 2 figures in supplemental material)
Constraining the origin of giant exoplanets via elemental abundance measurements
Creators: name: Knierim, Henrik
name: Shibata, Sho
name: Helled, Ravit
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The origin of close-in giant planets is a key open question in planet formation theory. The two leading models are (i) formation at the outer disk followed by migration and (ii) in situ formation. In this work we determine the atmospheric composition of warm Jupiters for both formation scenarios. We perform N-body simulations of planetesimal accretion interior and exterior to the water ice-line for various planetary formation locations, planetary masses, and planetesimal sizes to estimate the accreted heavy-element mass and final planetary composition. We find that the two models differ significantly: migrating giant planets have 2-14 times higher metallicities than planets that form in situ. The ratio between refractories and volatiles is found to be above one for migrating planets but below 0.4 for planets that form in situ. We also identify very different trends between heavy-element enrichment and planetary mass for these two formation mechanisms. While the metallicity of migrating planets is found to increase with decreasing planetary mass, it is about constant for in situ formation. Our study highlights the importance of measuring the atmospheric composition of warm Jupiters and its connection to their formation and evolutionary paths.
description: published in A&A, 5 pages, including 4 figures, plus 2 pages appendix; v2 follows the A&A language guidelines
Quasi-local stress-tensor formalism and the Casimir effect
Creators: name: Nazari, Borzoo
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We apply the quasi-local stress-energy tensor formalism to the Casimir effect of a scalar field confined between conducting planes located in a static spacetime. We show that the surface energy vanishes for both Neumann and Dirichlet boundary conditions and consequently the volume Casimir energy reduces to the famous zero point energy of the quantum field, i.e. $E^{vol.}=\sum\frac{\hbar ω}{2}$. This enables us to reinforce previous results in the literature and extend the calculations to the case of massive and arbitrarily coupled scalar field. We found that there exists a first order perturbation correction to the Casimir energy contrary to previous claims which state that it vanishes. This shows many orders of magnitude greater than previous estimations for the energy corrections and makes it detectable by near future experiments.
Transfer into use of unused agricultural lands: significance, challenges, solutions
Creators: name: Volkov, Sergey Nikolayevich
name: Cherkashina, Elena Vyacheslavovna
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: unused agricultural lands
transfer into active economic turnover
reasons for non-use
land use planning measures.

description: The article considers the urgent challenge of modern land relations – transfer into use of unused agricultural lands, area of which makes over 50 million ha, including 31.8 billion ha of agricultural lands, 19.4 million ha of arable lands as estimated by now according to the data of the Ministry of Agriculture of Russia. The research of the problem as for non-use of lands revealed three groups of reasons: economical, natural (ecological), and social. The economic reasons include generally unsatisfactory financial and economical conditions of the agricultural producers, natural reasons imply low productivity of lands due to unfavorable water regime, negative influences, natural and anthropogenic degradation processes; social reasons cover migration of population from villages, improper land use, including allocated land shares, absence of accurately defined boundaries, location of lands of this category. In order to solve the problem of transfer of unused agricultural lands into active economic turnover the need appears not only for more then 660 million roubles, but first of all, for the comprehensive land use planning measures on planning, rational use and conservation of the transferred lands. For this purpose the land use planning schemes should be drawn up for the areas of the Russian Federation subjects and their municipal units, as well as the projects of the intraeconomic land management and working projects.
Complex Classical Mechanics of a QES Potential
Creators: name: Mandal, Bhabani Prasad
name: Mahajan, Sushant S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a Parity-time (PT) invariant non-Hermitian quasi-exactly solvable (QES) potential which exhibits PT phase transition. We numerically study this potential in a complex plane classically to demonstrate different quantum effects. The particle with real energy makes closed orbits around one of the periodic wells of the complex potential depending on the initial condition. However interestingly the particle can have open orbits even with real energy if it is initially placed in certain region between the two wells on the same side of the imaginary axis. On the other hand when the particle energy is complex the trajectory is open and the particle tunnels back and forth between two wells which are separated by a classically forbidden path. The tunneling time is calculated for different pair of wells and is shown to vary inversely with the imaginary component of energy. At the classical level unlike the analogous quantum situation we do not see any qualitative differences in the features of the particle dynamics for PT symmetry broken and unbroken phases.
description: Minor modifications, Refs added
Modular Federated Learning
Creators: name: Liang, Kuo-Yun
name: Srinivasan, Abhishek
name: Andresen, Juan Carlos
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Federated learning is an approach to train machine learning models on the edge of the networks, as close as possible where the data is produced, motivated by the emerging problem of the inability to stream and centrally store the large amount of data produced by edge devices as well as by data privacy concerns. This learning paradigm is in need of robust algorithms to device heterogeneity and data heterogeneity. This paper proposes ModFL as a federated learning framework that splits the models into a configuration module and an operation module enabling federated learning of the individual modules. This modular approach makes it possible to extract knowlege from a group of heterogeneous devices as well as from non-IID data produced from its users. This approach can be viewed as an extension of the federated learning with personalisation layers FedPer framework that addresses data heterogeneity. We show that ModFL outperforms FedPer for non-IID data partitions of CIFAR-10 and STL-10 using CNNs. Our results on time-series data with HAPT, RWHAR, and WISDM datasets using RNNs remain inconclusive, we argue that the chosen datasets do not highlight the advantages of ModFL, but in the worst case scenario it performs as well as FedPer.
description: To be published in IEEE IJCNN 2022 proceedings
Rates and Asymmetries of B --> pi l+ l- Decays
Creators: name: Hou, Wei-Shu
name: Kohda, Masaya
name: Xu, Fanrong
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The LHCb experiment observed B+ --> pi+ mu+ mu- decay with 1.0 fb^-1 data, which is the first measurement of a flavor changing neutral current b --> d l+ l- decay (l = e, mu). Based on QCD factorization, we give Standard Model predictions for the branching ratios, direct CP asymmetries, and isospin asymmetry for B --> pi l+ l- decays, in the kinematic region where the dilepton invariant mass is small. We find that the contribution from weak annihilation enhances the direct CP asymmetry for low l+ l- pair mass. Anticipating improved measurements, we assess the utility of B+ --> pi+ l+ l- observables, when combined with B0 --> pi- l+ nu and B+ --> K+ l+ l-, for determining CKM parameters in the future.
description: 13 pages, 9 figures; version accepted for publication in PRD; references added
The management staff is a professional group of agricultural enterprises of Penza region
Creators: name: Khalidia Ksenofontova
name: Tuskov, Andrey
name: Kuznetsova, Tatiana
name: Tolmacheva, Valeria
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: professional group
management staff
managerial competences

description: The agricultural enterprises of Penza region are aimed at strategic planning and forecasting, developing along perspective lines of the region. The tightness of the labour market in the agricultural management does not favour forming management staff as a professional group. In its turn the difficulty of launching innovational business in modern Russia does not favour forming this labour market. This aspect influences the group’s performance and growth. The management staff can be referred to as a unique professional group, which appears when management competences are developed.
Majorana transport in superconducting nanowire with Rashba and Dresselhaus spin-orbit couplings
Creators: name: You, Jia-Bin
name: Shao, Xiao-Qiang
name: Tong, Qing-Jun
name: Chan, A. H.
name: Oh, C. H.
name: Vedral, Vlatko
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Tunneling experiment is a key technique for detecting Majorana fermion in solid state systems. We use Keldysh non-equilibrium Green function method to study multi-lead tunneling in superconducting nanowire with Rashba and Dresselhaus spin-orbit couplings. A zero-bias \textit{dc} conductance peak appears in our setup which signifies the existence of Majorana fermion and is in accordance with previous experimental results on InSb nanowire. Interestingly, due to the exotic property of Majorana fermion, there exists a hole transmission channel which makes the currents asymmetric at the left and right leads. The \textit{ac} current response mediated by Majorana fermion is also studied here. To discuss the impacts of Coulomb interaction and disorder on the transport property of Majorana nanowire, we use the renormalization group method to study the phase diagram of the wire. It is found that there is a topological phase transition under the interplay of superconductivity and disorder. We find that the Majorana transport is preserved in the superconducting-dominated topological phase and destroyed in the disorder-dominated non-topological insulator phase.
The Multidimensional Mentalizing Questionnaire (MMQ)
Creators: name: Gori, Alessio
name: Topino, Eleonora
Publisher: name: figshare
Year: 2022
Subjects: Clinical psychology
Counselling psychology
Health psychology
Social psychology
Educational psychology
Community psychology

description: The original (Italian) and translated versions of the Multidimensional Mentalizing Questionnaire (MMQ) are available here.
Territorial differentiation of areas Amur region at self-security level food
Creators: name: S. Rodomanskaya
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: region
food security
food security doctrine
self-sufficiency index
actual consumption
normative consumption
self-sufficiency level
population
food
own production
territorial differentiation

description: The relevance of this work is due to the territorial differentiation of the possibilities and scale of agricultural production in various regions of the country, which also affects the uneven food security of the population. The article examines the significant imbalances in the food supply of the population of the Amur Region. As a method of assessing the level of food security in the region, the methodology of the rating assessment of the level of self-sufficiency for basic foodstuffs was used. Practical significance of the methodology allowed to determine the place and level of the districts in solving the issue of self-sufficiency in the region's food. Within the region, districts and cities are grouped into three groups with a high, permissible and unacceptable level of food self-sufficiency. The changes in indicators of lagging agro-food directions that require increased attention to increase their own production capacities for the development of domestic production as the main direction for maintaining sustainable self-sufficiency of the region's population with food have been established. The main directions of the development of food production are determined and the necessity of optimizing the territorial food sector of the region is grounded.
Can static regular black holes form from gravitational collapse?
Creators: name: Zhang, Yiyang
name: Zhu, Yiwei
name: Modesto, Leonardo
name: Bambi, Cosimo
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Starting from the Oppenheimer-Snyder model, we know how in classical general relativity the gravitational collapse of matter form a black hole with a central spacetime singularity. It is widely believed that the singularity must be removed by quantum gravity effects. Some static quantum-inspired singularity-free black hole solutions have been proposed in the literature, but when one considers simple examples of gravitational collapse the classical singularity is replaced by a bounce, after which the collapsing matter expands for ever. We may expect 3 possible explanations: $i)$ the static regular black hole solutions are not physical, in the sense that they cannot be realized in Nature, $ii)$ the final product of the collapse is not unique, but it depends on the initial conditions, or $iii)$ boundary effects play an important role and our simple models miss important physics. In the latter case, after proper adjustment, the bouncing solution would approach the static one. We argue that the "correct answer" may be related to the appearance of a ghost state in de Sitter spacetimes with super Planckian mass. Our black holes have indeed a de Sitter core and the ghost would make these configurations unstable. Therefore we believe that these black hole static solutions represent the transient phase of a gravitational collapse, but never survive as asymptotic states.
description: 14 pages, 9 figures. v2: refereed version
Monkeypox virus detection using pre-trained deep learning-based approaches
Creators: name: Sitaula, Chiranjibi
name: Shahi, Tej Bahadur
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Monkeypox virus is emerging slowly with the decline of COVID-19 virus infections around the world. People are afraid of it, thinking that it would appear as a pandemic like COVID-19. As such, it is crucial to detect them earlier before widespread community transmission. AI-based detection could help identify them at the early stage. In this paper, we aim to compare 13 different pre-trained deep learning (DL) models for the Monkeypox virus detection. For this, we initially fine-tune them with the addition of universal custom layers for all of them and analyse the results using four well-established measures: Precision, Recall, F1-score, and Accuracy. After the identification of the best-performing DL models, we ensemble them to improve the overall performance using a majority voting over the probabilistic outputs obtained from them. We perform our experiments on a publicly available dataset, which results in average Precision, Recall, F1-score, and Accuracy of 85.44\%, 85.47\%, 85.40\%, and 87.13\%, respectively with the help of our proposed ensemble approach. These encouraging results, which outperform the state-of-the-art methods, suggest that the proposed approach is applicable to health practitioners for mass screening.
description: Under consideration in Journal of Medical Systems
The digital step-up of healthcare: from reactive care to predictive & personalized medicine
Creators: name: Manca, Marco
Publisher: name: Zenodo
Year: 2023
Subjects: impact
sense making
digital medicine
value chain maturity mapping
ergodicity
epistemology

description: Offered to the 2023 Multiplier Event of the "BeEmTel - Beyond the Emergency. Telecare for Non-Communicable Diseases through Simulation" project https://beemtel.eu/

 The scientific program is available here https://mediacentre.uniupo.it/media/7530/download
On a symbolic representation of non-central Wishart random matrices with applications
Creators: name: Di Nardo, Elvira
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: By using a symbolic method, known in the literature as the classical umbral calculus, the trace of a non-central Wishart random matrix is represented as the convolution of the trace of its central component and of a formal variable involving traces of its non-centrality matrix. Thanks to this representation, the moments of this random matrix are proved to be a Sheffer polynomial sequence, allowing us to recover several properties. The multivariate symbolic method generalizes the employment of Sheffer representation and a closed form formula for computing joint moments and cumulants (also normalized) is given. By using this closed form formula and a combinatorial device, known in the literature as necklace, an efficient algorithm for their computations is set up. Applications are given to the computation of permanents as well as to the characterization of inherited estimators of cumulants, which turn useful in dealing with minors of non-central Wishart random matrices. An asymptotic approximation of generalized moments involving free probability is proposed.
description: Journal of Multivariate Analysis (2014)
Analysis of the risk of bankruptcy LLC "Group of Companies" Rusagro" based on softw are package
Creators: name: A. A. Akimov
name: E. M. Safin
name: Yu. S. Ermilova
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: bankruptcy
risk degree
analysis
model

description: The paper presents the results of the development of a software package for assessing the risk of bankruptcy of an enterprise based on various methods of domestic and foreign authors. The article describes the capabilities of the developed program and its brief description. The testing of the developed program is shown on the example of the “Rusagro Group of Companies” company. All necessary coefficients for each method were calculated and the effect of these factors on bankruptcy analysis. Conclusions are made for each method used.
Multiparticle localization for disordered systems on continuous space via the fractional moment method
Creators: name: Fauser, Michael
name: Warzel, Simone
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate spectral and dynamical localization of a quantum system of $ n $ particles on $ \mathbb{R}^d $ which are subject to a random potential and interact through a pair potential which may have infinite range. We establish two conditions which ensure spectral and dynamical localization near the bottom of the spectrum of the $ n $-particle system: i)localization is established in the regime of weak interactions supposing one-particle localization, and ii)localization is also established under a Lifshitz-tail type condition on the sparsity of the spectrum. In case of polynomially decaying interactions, we provide an upper bound on the number of particles up to which these conditions apply.
Comparative study of the different types of organic fertilizers influence on the content of humus in technologically disturbed light gray forest light loamy soil
Creators: name: Titova Vera Ivanovna
name: Vetchinnikov Aleksandr Aleksandrovich
name: Krasovsky Aleksandr Andreevich
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: mechanical disturbance of soils
light gray forest light loamy soil
organic fertilizers
humus.

description: Mechanical mixing of the arable and subsurface layers of light gray forest light loamy soil in a 1:3 ratio leads to the fact that it significantly reduces fertility by the content of organic matter by 64.7% compared to the corresponding characteristics of the arable layer of the background soil. To restore the fertility of the disturbed soil with its content under the cultural cenosis with a very high projective cover (about 80-95%) and with two years of green manure application, but without fertilizer and agricultural amelioration (control version) for 6 years of observations failed. The application of cattle manure at a dose of about 100 t/ha leads to an improvement in the basic agrochemical indicators of the soil to the “insignificant decrease in fertility” characteristic of the humus content after 5 years. By the effectiveness of the impact on the content of humus in the soil, the studied organic fertilizers can be arranged in the following order in descending order: cattle manure half-subdued
Machine learning optimization of Majorana hybrid nanowires
Creators: name: Thamm, Matthias
name: Rosenow, Bernd
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: As the complexity of quantum systems such as quantum bit arrays increases, efforts to automate expensive tuning are increasingly worthwhile. We investigate machine learning based tuning of gate arrays using the CMA-ES algorithm for the case study of Majorana wires with strong disorder. We find that the algorithm is able to efficiently improve the topological signatures, learn intrinsic disorder profiles, and completely eliminate disorder effects. For example, with only 20 gates, it is possible to fully recover Majorana zero modes destroyed by disorder by optimizing gate voltages.
description: 13 pages, 13 figures; added references
Density profile of noninteracting fermions in a rotating $2d$ trap at finite temperature
Creators: name: Kulkarni, Manas
name: Doussal, Pierre Le
name: Majumdar, Satya N.
name: Schehr, Gregory
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the average density of $N$ spinless noninteracting fermions in a $2d$ harmonic trap rotating with a constant frequency $Ω$ and in the presence of an additional repulsive central potential $γ/r^2$. The average density at zero temperature was recently studied in Phys. Rev. A $\textbf{103}$, 033321 (2021) and an interesting multi-layered "wedding cake" structure with a "hole" at the center was found for the density in the large $N$ limit. In this paper, we study the average density at finite temperature. We demonstrate how this "wedding-cake" structure is modified at finite temperature. These large $N$ results warrant going much beyond the standard Local Density Approximation. We also generalize our results to a wide variety of trapping potentials and demonstrate the universality of the associated scaling functions both in the bulk and at the edges of the "wedding-cake".
description: 18 pages, 7 figures, 1 table
Information support of optimization of interaction of natural and technogenic subsystems of the river coastal territory
Creators: name: Murasheva, Alla Andreevna
name: Fomin Alexander Anatolyevich
name: Vdovenko Alla Vladimirovna
name: Lepekhin Pavel Pavlovich
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: information support
natural
natural and man-made environment
monitoring
databases
collection
processing

description: The article discusses ways to obtain relevant information on the state of the natural and naturalman-made situation, which is necessary to reduce the risks of natural and man-made emergencies in coastal river areas, to promptly inform the population of an integrated system that includes federal, regional and local information centers. It was noted that to create a systematized database, the factors determining the operating conditions of technogenic systems are considered, which include, first of all, such factors as hydrological, topographical (relief), geological (soil), as well as those changes of these factors, which are determined by human intervention into nature for agricultural land development in coastal areas and other activities. Information is of great importance for the optimal management of river coastal and, above all, border areas. It is a limited and expensive resource of the executive authorities, the management bodies of various production structures, individuals and legal entities that are somehow connected by their activities to the territories located in the coastal, transboundary and border areas. Persons interested in information on the state of the coastal territories with the aim of ensuring efficient and safe activities do not have the same information, therefore its mutual exchange is necessary. In the era of globalization, the main information source is global networks like the Internet, as a single global information space. These trends radically change the approach to the information support of the activities of all governing bodies. The proposal to create an information platform for interaction of owners of data on the natural and natural-technogenic condition in a river coastal area depends on many factors and, above all, the need to process large amounts of data using big data technologies that are used to process large amounts of data in order to obtain new information and which is difficult to handle in the usual ways.
SU(5)xSU(5)' unification and D2 parity: Model for composite leptons
Creators: name: Tavartkiladze, Zurab
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a grand unified SU(5)xSU(5)' model supplemented by D2 parity. The D2 greatly reduces the number of parameters and is important for phenomenology. The model, we present, has various novel and interesting properties. Because of the specific pattern of grand unification symmetry breaking and emerged strong dynamics at low energies, the Standard Model leptons, along with right-handed/sterile neutrinos, come out as composite states. The generation of the charged fermion and neutrino masses are studied within the considered scenario. Moreover, the issues of gauge coupling unification and nucleon stability are investigated in details. Various phenomenological implications are also discussed.
description: Matched to Phys. Rev. D version; added references. LaTex, 3 figures, 1 table
Galilei covariance and Einstein's equivalence principle in quantum reference frames
Creators: name: Pereira, S. T.
name: Angelo, R. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The covariance of the Schrödinger equation under Galilei boosts and the compatibility of nonrelativistic quantum mechanics with Einstein's equivalence principle have been constrained for so long to the existence of a superselection rule which would prevent a quantum particle from being found in superposition states of different masses. In an effort to avoid this expedient, and thus allow nonrelativistic quantum mechanics to account for unstable particles, recent works have suggested that the usual Galilean transformations are inconsistent with the nonrelativistic limit implied by the Lorentz transformation. Here we approach the issue in a fundamentally different way. Using a formalism of unitary transformations and employing quantum reference frames rather than immaterial coordinate systems, we show that the Schrödinger equation, although form variant, is fully compatible with the aforementioned principles of relativity.
description: 7 pages, thoroughly revised, published version
A Note on the Existence of Gibbs Marked Point Processes with Applications in Stochastic Geometry
Creators: name: Petráková, Martina
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60D05, 60G55

description: This paper generalizes a recent existence result for infinite-volume marked Gibbs point processes. We try to use the existence theorem for two models from stochastic geometry. First, we show the existence of Gibbs facet processes in $\mathbb{R}^d$ with repulsive interactions. We also prove that the finite-volume Gibbs facet processes with attractive interactions need not exist. Afterwards, we study Gibbs-Laguerre tessellations of $\mathbb{R}^2$. The mentioned existence result cannot be used, since one of its assumptions is not satisfied for tessellations, but we are able to show the existence of an infinite-volume Gibbs-Laguerre process with a particular energy function, under the assumption that we almost surely see a point.
description: 28 pages, published version, minor changes, one subsection moved to appendix
Slowly-Rotating Black Holes in Einstein-Dilaton-Gauss-Bonnet Gravity: Quadratic Order in Spin Solutions
Creators: name: Ayzenberg, Dimitry
name: Yunes, Nicolas
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive a stationary and axisymmetric black hole solution in Einstein-Dilaton-Gauss-Bonnet gravity to quadratic order in the ratio of the spin angular momentum to the black hole mass squared. This solution introduces new corrections to previously found nonspinning and linear-in-spin solutions. The location of the event horizon and the ergosphere are modified, as well as the quadrupole moment. The new solution is of Petrov type I, although lower order in spin solutions are of Petrov type D. There are no closed timelike curves or spacetime regions that violate causality outside of the event horizon in the new solution. We calculate the modifications to the binding energy, Kepler's third law, and properties of the innermost stable circular orbit. These modifications are important for determining how the electromagnetic properties of accretion disks around supermassive black holes are changed from those expected in general relativity.
description: 13 pages, 1 figure. Updated to published version. Typos fixed
Observation of a Dissipation-Induced Classical to Quantum Transition
Creators: name: Raftery, James
name: Sadri, Darius
name: Schmidt, Sebastian
name: Türeci, Hakan E.
name: Houck, Andrew A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report here the experimental observation of a dynamical quantum phase transition in a strongly interacting open photonic system. The system studied, comprising a Jaynes-Cummings dimer realized on a superconducting circuit platform, exhibits a dissipation driven localization transition. Signatures of the transition in the homodyne signal and photon number reveal this transition to be from a regime of classical oscillations into a macroscopically self-trapped state manifesting revivals, a fundamentally quantum phenomenon. This experiment also demonstrates a small-scale realization of a new class of quantum simulator, whose well controlled coherent and dissipative dynamics is suited to the study of quantum many-body phenomena out of equilibrium.
description: 34 pages, 13 figures, includes supplementary material; significant additions to theory sections
R script for the data analysis: Resting GABA and glutamate concentrations in primary visual cortex and right anterior insula predict subjective visual sensitivity
Creators: name: Páleník, Jan
Publisher: name: Zenodo
Year: 2023
Subjects: subjective visual sensitivity; Pattern Glare Test; 1H-MRS; GABA; glutamate; visual processing

description: The R script to analyze the data for scientific article named "Resting GABA and glutamate concentrations in primary visual cortex and right anterior insula predict subjective visual sensitivity".
Geometric Discord Of the Jaynes-Cummings Model: Pure Dephasing Regime
Creators: name: Raja, Sina Hamedani
name: Mohammadi, Hamidreza
name: Akhtarshenas, S. Javad
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, the dynamical behaviour of the geometric discord of a system consisting of a two-level atom interacting with a quantised radiation field described by the Jaynes-Cummings model has been studied. The evolution of the system has been considered in the pure dephasing regime when the field is initially in a general pure state and the atom is initially in a mixed state. Dynamics of the geometric discord, as a measure of non-classical correlation, has been compared with the dynamics of negativity, as a measure of quantum entanglement. In particular, the influence of different parameters of system such as detuning and mixedness of the initial atomic state on the dynamics of geometric discord has been evaluated for when the field is initially in coherent and number states. It is shown that for asymptotically large times, the steady state geometric discord of the system presents a non-zero optimum value at some intermediate value of detuning.
description: 21 pages, 7 figures. appears in Eur. Phys. J. D 2014