cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Slowly-rotating compact objects: the nonintegrability of Hartle-Thorne particle geodesics
Creators: name: Destounis, Kyriakos
name: Kokkotas, Kostas D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: X-ray astronomy provides information regarding the electromagnetic emission of active galactic nuclei and X-ray binaries. These events provide details regarding the astrophysical environment of black holes and stars, and help us understand gamma-ray bursts. They produce estimates for the maximum mass of neutron stars and eventually will contribute to the discovery of their equation of state. Thus, it is crucial to study them in order to enhance the yield of X-ray astronomy when combined with multimessenger astrophysics. An exact solution of the field equations does not exist for rotating neutron stars. There exist a variety of approximate solutions for compact objects that may characterize relativistic stars. The most studied approximation is the Hartle-Thorne metric that represents slowly-rotating compact objects, like massive stars, white dwarfs and neutron stars. Recent investigations of photon orbits and shadows of such metric revealed that it exhibits chaos close to resonances. Here, we thoroughly investigate particle orbits around the Hartle-Thorne spacetime up to second order in rotation. We perform an exhaustive analysis of bound motion, by varying all parameters involved in the system. We demonstrate that chaotic regions, known as Birkhoff islands, form around resonances, where the ratio of the radial and polar frequency of geodesics, known as the rotation number, is shared throughout the island. This leads to the formation of plateaus in rotation curves during the most prominent $2/3$ resonance, which confirms that generic geodesics are nonintegrable. We measure their width and show how each parameter affects it. The nonintegrability of Hartle-Thorne metric may affect quasiperiodic oscillations of low-mass X-ray binaries, when chaos is taken into account, and might potentially improve estimates of mass, angular momentum and multipole moments of astrophysical compact objects.
description: 15 pages, 5 figures, minor revision, abstract abridged due to arxiv limitations, accepted for publication in General Relativity and Gravitation
Bifurcations in dissipative fermionic dynamics
Creators: name: Napolitani, P.
name: Colonna, M.
name: Di Prima, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Boltzmann-Langevin One-Body model (BLOB), is a novel one-body transport approach, based on the solution of the Boltzmann-Langevin equation in three dimensions; it is used to handle large-amplitude phase-space fluctuations and has a broad applicability for dissipative fermionic dynamics. We study the occurrence of bifurcations in the dynamical trajectories describing heavy-ion collisions at Fermi energies. The model, applied to dilute systems formed in such collisions, reveals to be closer to the observation than previous attempts to include a Langevin term in Boltzmann theories. The onset of bifurcations and bimodal behaviour in dynamical trajectories, determines the fragment-formation mechanism. In particular, in the proximity of a threshold, fluctuations between two energetically favourable mechanisms stand out, so that when evolving from the same entrance channel, a variety of exit channels is accessible. This description gives quantitative indications about two threshold situations which characterise heavy-ion collisions at Fermi energies. First, the fusion-to-multifragmentation threshold in central collisions, where the system either reverts to a compact shape, or splits into several pieces of similar sizes. Second, the transition from binary mechanisms to neck fragmentation (in general, ternary channels), in peripheral collisions.
description: Conf. proc. ECHIC November 6-8, 2013 Messina (Italy)
title: The problem of phasification of the parameters of the storage process of a sportshead oil raw material when building a fuzzy regulator
Creators: name: Kabulov, N.A.
Publisher: name: Tashkent State Technical University Named after Islam Karimov
Year: 2018

description: The article proposes an automated intelligent process control system for the storage of perishable oilseed raw materials based on phase-control. To solve the problem of phasing the process parameters, the modified Saaty method is used. In order to optimize the description, the obtained membership functions were approximated in the Maple symbolic mathematics package.
Asymptotic Analysis of Inpainting via Universal Shearlet Systems
Creators: name: Genzel, Martin
name: Kutyniok, Gitta
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42C40, 42C15, 65J22, 65T60, 68U10

description: Recently introduced inpainting algorithms using a combination of applied harmonic analysis and compressed sensing have turned out to be very successful. One key ingredient is a carefully chosen representation system which provides (optimally) sparse approximations of the original image. Due to the common assumption that images are typically governed by anisotropic features, directional representation systems have often been utilized. One prominent example of this class are shearlets, which have the additional benefitallowing faithful implementations. Numerical results show that shearlets significantly outperform wavelets in inpainting tasks. One of those software packages, www.shearlab.org, even offers the flexibility of usingdifferent parameter for each scale, which is not yet covered by shearlet theory. In this paper, we first introduce universal shearlet systems which are associated with an arbitrary scaling sequence, thereby modeling the previously mentioned flexibility. In addition, this novel construction allows for a smooth transition between wavelets and shearlets and therefore enables us to analyze them in a uniform fashion. For a large class of such scaling sequences, we first prove that the associated universal shearlet systems form band-limited Parseval frames for $L^2(\mathbb{R}^2)$ consisting of Schwartz functions. Secondly, we analyze the performance for inpainting of this class of universal shearlet systems within a distributional model situation using an $\ell^1$-analysis minimization algorithm for reconstruction. Our main result in this part states that, provided the scaling sequence is comparable to the size of the (scale-dependent) gap, nearly-perfect inpainting is achieved at sufficiently fine scales.
title: Equations and transfer functions of main elements of a multi-motorized automated electric drive of pumping unit
Creators: name: Khamudkhanov, M.M.
name: Umarov, Sh.B.
Publisher: name: Tashkent State Technical University Named after Islam Karimov
Year: 2018

description: In this very article the principle of building an energy-sufficient multi-engine automated drive of waterlifting pumping unit is suggested, its main electromechanical ratios are given and equations are obtained that define the dynamics of the system and main elements were put into transfer functions.
515 nm wavelength laser for laser melt injection of high-quality MMC in Cu-ETP
Creators: name: Langebeck, Anika
name: Bohlen, Annika
Publisher: name: BIAS Verlag
Year: 2022
Subjects: subject: laser melt injection
subject: metal matrix composite
subject: tungsten carbide
subject: Cu-ETP
subject: visible wavelength laser
subject: 620

description: Laser melt injection (LMI) is used to improve abrasive wear resistance by building a metal matrix composite (MMC) layer in highly loaded tool surfaces. But LMI for highly conductive and highly reflective materials like copper can be very challenging. Nowadays high-power laser beam sources with visible wavelengths are available enabling LMI in these materials. This paper shows a suitable process window for LMI with 515 nm wavelength laser in pure copper with spherical fused tungsten carbide as reinforcing phase. High-quality MMC can be manufactured by using laser power intensities in the range of 104 W/cm² and conduction heating of the matrix mate-rial between 300 °C and 400 °C. The microstructure exhibits only a few imperfections and has a high particle content of 44 %.
The phase of the scattering operator from the geometry of certain infinite-dimensional groups
Creators: name: Mickelsson, Jouko
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81T16, 22E66

description: We revisit the computation of the phase of the Dirac fermion scattering operator in external gauge fields. The computation is through a parallel transport along the path of time evolution operators. The novelty of the present paper compared with the earlier geometric approach by Langmann and Mickelsson, [LM], is that we can avoid the somewhat arbitrary choice in the regularization of the time evolution for intermediate times using a natural choice of the connection form on the space of appropriate unitary operators.
description: 9 pages, no figures
FakeSwarm: Improving Fake News Detection with Swarming Characteristics
Creators: name: Wu, Jun
name: Ye, Xuesong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The proliferation of fake news poses a serious threat to society, as it can misinform and manipulate the public, erode trust in institutions, and undermine democratic processes. To address this issue, we present FakeSwarm, a fake news identification system that leverages the swarming characteristics of fake news. To extract the swarm behavior, we propose a novel concept of fake news swarming characteristics and design three types of swarm features, including principal component analysis, metric representation, and position encoding. We evaluate our system on a public dataset and demonstrate the effectiveness of incorporating swarm features in fake news identification, achieving an f1-score and accuracy of over 97% by combining all three types of swarm features. Furthermore, we design an online learning pipeline based on the hypothesis of the temporal distribution pattern of fake news emergence, validated on a topic with early emerging fake news and a shortage of text samples, showing that swarm features can significantly improve recall rates in such cases. Our work provides a new perspective and approach to fake news detection and highlights the importance of considering swarming characteristics in detecting fake news.
description: 9th International Conference on Data Mining and Applications (DMA 2023). Keywords: Fake News Detection, Metric Learning, Clustering, Dimensionality Reduction
title: Information-algorithmic support of decision-making in problems of primary processing of cotton-raw processes
Creators: name: Khalmatov, D.A.
name: Alimova, G.R.
name: Mirzaakhmedova, Kh.B.
name: Khujanazarov, U.O.
Publisher: name: Tashkent State Technical University Named after Islam Karimov
Year: 2018

description: On the basis of the system-structural approach the formalized multilevel structure of information interaction technological to operation at the clap-raw processing, allowing to present in the uniform form set diverse the information and providing uniform information base for technological monitoring at decision-making support. Situational models of process of functioning of the technological units, considering multi-variant approach of modes of functioning of the units corresponding to various industrial situations are developed.
Influence of electrolyte concentration on laser chemical machining
Creators: name: Simons, Marcel
name: Radel, Tim
Publisher: name: BIAS Verlag
Year: 2022
Subjects: subject: micromachining
subject: shielding effect
subject: boiling
subject: 620

description: To meet the increasing trend of miniaturization, new (non-conventional) manufacturing processes are constantly being developed. The laser chemical process describes one of these non-conventional removal process in the microscale, based on the thermochemical dissolution of metals. To determine the influence of electrolyte concentrations, linear cavities were created in Titanium Grade 1 using phosphoric acid and sulfuric acid with different concentrations. The experimental results show that as the electrolyte concentration increases, the process window is reduced. One possibility for this is, as the electrolyte concentration increases, the viscosity increases, as well. With increasing viscosity, the electrolyte boiling process, which causes the shielding effect of the gas bubbles becomes more significant. Due to the increasing conductivity of the electrolyte at higher concentrations, the laser chemical removal rate increases within the process window at constant laser power. The maximum removal rate is observed at the maximum conductivity of the electrolyte.
Coherence Properties of the Repulsive Anyon-Hubbard Dimer
Creators: name: Bonkhoff, Martin
name: Jäger, Simon B.
name: Schneider, Imke
name: Pelster, Axel
name: Eggert, Sebastian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: One-dimensional anyonic models of the Hubbard type show intriguing ground-state properties, effectively transmuting between Bose-Einstein and Fermi-Dirac statistics. The simplest model that one can investigate is an anyonic version of the bosonic Josephson junction, the repulsive anyon-Hubbard dimer. In the following we find an exact duality relation to the Bethe-solvable Bose-Hubbard dimer, which is well known from quantum optics and information theory and has interesting connections to spin squeezing and entangled coherent states. Conversely, we show that the anyonic Hubbard dimer has nontrivial coherence properties that emerge from the anyonic statistics. In particular, we find that coherences can be suppressed and amplified and show that these features are remarkably robust against additional repulsive on-site interactions highlighting the distinct nature of anyons.
description: 8 pages, 3 figures, for more information and latest version see https://www.physik.uni-kl.de/eggert/papers/
title: Bayesian Implementation and Rent Extraction in a Multi-Dimensional Procurement Problem
Creators: name: Herweg, Fabian
name: Schmidt, Klaus
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018
Subjects: subject: 330

description: We consider a multi-dimensional procurement problem in which sellers have private information about their costs and about a possible design flaw. The information about the design flaw is necessarily correlated. We solve for the optimal Bayesian procurement mechanism that implements the efficient allocation under the constraint that sellers are protected by limited liability. We show that the rents obtained from reporting costs truthfully can be used to reduce the rents sellers must get for reporting the flaw. We compare the optimal Bayesian mechanism to the optimal ex post incentive compatible mechanism that is informationally less demanding.
Tensile strength of Nitinol flanges fabricated by laser rod end melting and immediate flange processing
Creators: name: Lu, Yang
name: Radel, Tim
Publisher: name: BIAS Verlag
Year: 2022
Subjects: subject: Shape memory alloy
subject: Laser rod end melting
subject: Flange processing
subject: Tensile strength
subject: 620

description: Nitinol is a shape memory alloy used for actuator applications. However, the connection between Nitinol wire and mechanical system via adhesive bonding or crimping could be weakened due to the exposure of joint in aggressive environments and temperature changes. Therefore, a process chain called laser rod end melting with immediate flange processing has been put forward and proven to fabricate all-in-one Nitinol flanges. According to previous work, there is a partially solidified preform connecting to the wire as the shaft, where the connection factures under tensile tests. In the present study, the effect of size of partially solidified preform on the tensile behavior was investigated on the cylindrical flanges with different flange heights. The results show that the partial preform volume increases with the flange heights, while the tensile strength becomes smaller when the flange height is too small. This suggests that it is important to maintain the mechanical strength of Nitinol flange by choosing the appropriate flange height.
Perspectives of current-layer diagnostics in solar flares
Creators: name: Oreshina, A. V.
name: Oreshina, I. V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A reconnecting current layer is a `heart' of a solar flare, because it is a place of magnetic-field energy release. However there are no direct observations of these layers. The aim of our work is to understand why we actually do not directly observe current layers and what we need to do it in the future. The method is based on a simple mathematical model of a super-hot (T ~ 1E8 K) turbulent-current layer (SHTCL) and a model of plasma heating by the layer. The models allow us to study a correspondence between the main characteristics of the layer, such as temperature and dimensions, and the observational features, such as differential and integral emission measure of heated plasma, intensity of spectral lines Fe XXVI (1.78 and 1.51A) and Ni XXVII (1.59 A). This method provides a theoretical basis for determining parameters of the current layer from observations. Observations of SHTCLs are difficult, because the spectral line intensities are faint, but it is theoretically possible in the future. Observations in X-ray range 1.5--1.8 A with high spectral resolution (better than 0.01 A) and high temporal resolution (seconds) are needed. It is also very important to interpret the observations using a multi-temperature approach instead of the usual single or double temperature method.
Lattice models of random advection and diffusion and their statistics
Creators: name: Lepri, Stefano
name: Politi, Paolo
name: Pikovsky, Arkady
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study in detail a one-dimensional lattice model of a continuum, conserved field (mass) that is transferred deterministically between neighbouring random sites. The model falls in a wider class of lattice models capturing the joint effect of random advection and diffusion and encompassing as specific cases, some models studied in the literature, like the Kang-Redner, Kipnis-Marchioro-Presutti, Takayasu-Taguchi, etc. The motivation for our setup comes from a straightforward interpretation as advection of particles in one-dimensional turbulence, but it is also related to a problem of synchronization of dynamical systems driven by common noise. For finite lattices, we study both the coalescence of an initially spread field (interpreted as roughening), and the statistical steady-state properties. We distinguish two main size-dependent regimes, depending on the strength of the diffusion term and on the lattice size. Using numerical simulations and mean-field approach, we study the statistics of the field. For weak diffusion, we unveil a characteristic hierarchical structure of the field. We also connect the model and the iterated function systems concept.
description: Revised version, to be published in Physical Review E
title: Phytophthora σε Alnus spp. (σκλήθρο)
Creators: name: Marçais, Benoit
name: Husson, Claude
Publisher: name: Julius Kühn-Institut, Federal Research Centre for Cultivated Plants
Year: 2013

description: JKI Data Sheets Plant Pests and Diagnosis; 2013/65
description: Το γένος Alnus (Betulaceae) απαντάται στο βόρειο ημισφαίριο και περιλαμβάνει τριάντα πέντε είδη (http://www.discoverlife.org). Υπάρχουν τέσσερα αυτόχθονα είδη στην ευρωπαϊκή ήπειρο, τα: A. incana (γκρι σκλήθρο), το A. cordata (σκλήθρο της Ιταλίας ή της Κορσικής), το A. glutinosa (κοινό ή μαύρο σκλήθρο) και το A. viridis (πράσινο σκλήθρο). Επιπλέον, το είδος A. rubra που είναι αυτόχθονο δένδρο της Βόρειας Αμερικής καλλιεργείται εκτεταμένα σε κάποιες ευρωπαϊκές χώρες (Claessens, 2003). Το γένος Alnus έχει μεγάλη οικολογική σημασία, καθώς είναι ανθεκτικό σε εδάφη που περιοδικά κατακλύζονται από νερό. Το είδος A. glutinosa είναι το πιο κοινό είδος και απαντάται σε όλη την Ευρώπη και σε υψόμετρα μέχρι 1800 m.  Είναι είδος προσαρμοσμένο σε υγρές συνθήκες και παίζει σημαντικό ρόλο σε παραποτάμια οικοσυστήματα καθώς με το ριζικό του σύστημα σταθεροποιεί τις όχθες των ποταμών και παρεμποδίζει τη διάβρωση (Webber et al., 2004). Το μαύρο σκλήθρο έχει θετική επίδραση στο έδαφος (πορώδες, συμβίωση με είδη του γένους Frankia), στην ποιότητα του νερού (φιλτράρισμα, καθαρισμός νερού) καθώς και στην πανίδα. Συμβάλλει στην αύξηση της βιοποικιλότητας πτηνών και εντόμων, ενώ το ριζικό του σύστημα παρέχει καταφύγιο σε ψάρια. Το Alnus incana απαντάται ευρέως στην κεντρική και ανατολική Ευρώπη, ενώ στο νότιο τμήμα της ηπείρου αναπτύσσεται κυρίως σε ορεινές περιοχές. Το είδος A. incana σταθεροποιεί τις όχθες των ποταμών καθώς αναπτύσσει παραφυάδες αλλά και επειδή είναι ανθεκτικό τόσο σε ξηροθερμικές συνθήκες όσο και σε εδάφη που κατακλύζονται από νερό (Jung & Blaschke, 2004). Τα είδη A. cordata και A. viridis απαντώνται λιγότερο συχνά και είναι ιθαγενή είδη της Κορσικής και των βουνών της κεντρικής Ευρώπης (Claessens, 2003).
Laser micro structuring of multi-layer coatings on aircraft splines for optimization of the surface properties
Creators: name: Stephen, Andreas
name: Lenz, Bastian
name: Hellenbrand, Gerrit
Publisher: name: BIAS Verlag
Year: 2022
Subjects: subject: Laser micro structuring
subject: PVD-coatings
subject: Wear behavior
subject: 620

description: In the aircraft industry spline-joints are used for the connection of subassemblies in geared turbofans. Besides the power transmission, spline-joints are used to compensate deviations in the shaft system, such as angular or axial misalignments. By decoupling the subassemblies, constraining forces are reduced, which affects the dimensioning of the surrounding components. Increasing the load capacity of spline-joints enables a lean and efficient design of the components. The wear behavior of such heavily loaded splines can be improved by multi-layered coatings deposited e. g. by physical vapor deposi-tion (PVD). Further improvements can be realized by an additional laser structured surface topology, which includes an arrangement of semi-spheres in the coating system with diameters in the micrometer range. These semi-spheres can either serve as a micro pocket for lubrications or are applied before the final coating step to be replenished with a hard lubricant layer. This paper addresses this subject by presenting the manufacturing process of splines with focus on the laser texturing process.
Temperature-dependent structural property and power factor of n type thermoelectric Bi0.90Sb0.10 and Bi0.86Sb0.14 alloys
Creators: name: Malik, K.
name: Das, Diptasikha
name: Bandyopadhyay, S.
name: Mandal, P.
name: Deb, A. K.
name: Srihari, Velaga
name: Banerjee, Aritra
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermal variation of structural property, linear thermal expansion coefficient, resistivity, thermopower and power factor of polycrystalline Bi1-xSbx (x=0.10, 0.14) samples are reported. Temperature-dependent powder diffraction experiments indicate that samples do not undergo any structural phase transition. Rietveld refinement technique has been used to perform detailed structural analysis. Temperature dependence of thermal expansion coefficient is found to be stronger for Bi0.90Sb0.10. Also, power factor for direct band gap Bi0.90Sb0.10 is higher as compared to that for indirect band gap Bi0.86Sb0.14. Role of electron-electron and electron-phonon scattering on resistivity, thermopower and power factor have been discussed.
Sampling U(1) gauge theory using a re-trainable conditional flow-based model
Creators: name: Singha, Ankur
name: Chakrabarti, Dipankar
name: Arora, Vipul
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Sampling topological quantities in the Monte Carlo simulation of Lattice Gauge Theory becomes challenging as we approach the continuum limit of the theory. In this work, we introduce a Conditional Normalizing Flow (C-NF) model to sample U(1) gauge theory in two dimensions, aiming to mitigate the impact of topological freezing when dealing with smaller values of the U(1) bare coupling. To train the conditional flow model, we utilize samples generated by Hybrid Monte Carlo (HMC) method, ensuring that the autocorrelation in topological quantities remains low. Subsequently, we employ the trained model to interpolate the coupling parameter to values where training was not performed. We thoroughly examine the quality of the model in this region and generate uncorrelated samples, significantly reducing the occurrence of topological freezing. Furthermore, we propose a re-trainable approach that utilizes the model's own samples to enhance the generalization capability of the conditional model. This method enables sampling for coupling values that are far beyond the initial training region, expanding the applicability of the model.
description: 1. Comments: page 4, added a section on Mode collapse in U(1) Gauge Theory. 2. Comments: page 11, added a section in appendix
Effects of Stream Channel Improvements on Downstream Floods
Creators: name: Huang, Yang H.
name: Gaynor, Ronald K.
Publisher: name: Kentucky Water Resources Research Institute, University of Kentucky
Year: 1977

description: Abstract:
This report presents a self-calibrating watershed model for predicting the effect of channel improvements on downstream floods. The model is called MOPSET because it is a modified version of OPSET developed several years ago at the University of Kentucky. OPSET is a computerized procedure for determining an optimum set of parameter values by matching synthesized flows with recorded flows. Major modifications include the replacement of the modified Muskingum method of channel routing by a kinematic finite difference method, the division of the watershed into a number of segments, and the inclusion of a storage routing procedure to take care of any reservoirs or flood control structures located in the watershed. The computer program is well documented and can be used not only as a flood predicting model but also as a general model for hydrologic simulations.
The model was applied to three different watersheds in Kentucky. It was found that the optimum set of parameter values obtained automatically by the model was not unique and might not yield the most desirable solution. For this reason, new features were added so that the user can exercise his judgment in selecting the most desirable parameter values.
The synthesized flows obtained from these watersheds are presented and compared with the recorded flows. The effects of channel improvements, flood control structures, and routing procedures on the synthesized flows are discussed.
Funding information: The work on which this report is based was supported in part by funds provided by the Office of Water Research and Technology, United States Department of the Interior, as authorized under the Water Resources Act of 1964.
Hybrid additive manufacturing with titanium powder and aluminum substrates via laser powder bed fusion
Creators: name: Müller, Sven
name: Mattulat, Thorsten
name: Woizeschke, Peer
Publisher: name: BIAS Verlag
Year: 2022
Subjects: subject: Laser powder bed fusion
subject: additive manufacturing
subject: multi-material
subject: 620

description: For the thermal joining of aluminum and titanium, the approach of solely melting the aluminum joining partner, while the titanium partner stays in the solid form, has been commonplace since 1996. This is done to limit the formation of a brittle intermetallic compound layer in the interface. In case of additive manufacturing with titanium powder and aluminum substrates, this approach is not transferrable because the titanium powder has to be melted to create the part. In this study, titanium samples were additively manufactured onto aluminum substrates using a commercial laser powder bed fusion (LPBF) machine. The influences of the energy density during the process on the sample porosity, the characteristics of the interface between sample and substrate, as well as the interfacial tensile strength are analyzed. Despite the melting of both materials, a great potential for high interfacial tensile strength has been found.
Topological Mid-gap States of px+ipy Topological Superconductor with Vortex superlattice
Creators: name: Zhou, Jiang
name: Wang, Shi-Zhu
name: Wu, Ya-Jie
name: Li, Rong-Wu
name: Kou, Su-Peng
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this paper, the px+ipy topological superconductor with vortex superlattice is studied. We found that there exist mid-gap energy bands induced by the vortex superlattice and the mid-gap energy bands have nontrivial topological properties including the gapless edge states and non-zero winding number. An topological anisotropic tight-binding Majorana lattice model is proposed to describe the mid-gap states.
description: 15 pages, 6 figures
title: Virtual analyser of quality of liquid products
Creators: name: Ruziev, U.A.
name: Shodiev, M.K.
Publisher: name: Tashkent State Technical University Named after Islam Karimov
Year: 2018

description: The conceptual foundations of the construction of virtual analysers and their application in systems for monitoring the state of continuous technological processes are considered. A parametric model of process control is proposed, allowing to structure a multitude of virtual analysers and determine the types of their functionality. An approach to the problem of building a unified virtual monitoring system based on a matrix of typical virtual analysers has been studied.
Discharge characteristics of a low-pressure geometrically asymmetric cylindrical capacitively coupled plasma with an axisymmetric magnetic field
Creators: name: Dahiya, Swati
name: Singh, Pawandeep
name: Patil, Yashashri
name: Sharma, Sarveshwar
name: Sirse, Nishant
name: Karkari, Shantanu Kumar
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We investigate the discharge characteristics of a low-pressure geometrically asymmetric cylindrical capacitively coupled plasma discharge with an axisymmetric magnetic field generating an EXB drift in the azimuthal direction. Vital discharge parameters, including electron density, electron temperature, DC self-bias, and Electron Energy distribution function (EEDF), are studied experimentally for varying magnetic field strength (B). A transition in the discharge asymmetry is observed along with a range of magnetic fields where the discharge is highly efficient with lower electron temperature. Outside this range of magnetic field, the plasma density drops, followed by an increase in the electron temperature. The observed behavior is attributed to the transition from geometrical asymmetry to magnetic field-associated symmetry due to reduced radial losses and plasma confinement in the peripheral region. In this region, the DC self-bias increases almost linearly from a large negative value to nearly zero, i.e., the discharge becomes symmetric. The EEDF undergoes a transition from bi-Maxwellian for unmagnetized to Maxwellian at intermediate B and finally becomes a weakly bi-Maxwellian at higher values of B. The above transitions present a novel way to independently control the ion energy and ion flux in a cylindrical CCP system using an axisymmetric magnetic field with an enhanced plasma density and lower electron temperature operation that is beneficial for plasma processing applications.
title: System of adaptive control of technological parameters of production of soda
Creators: name: Uteuliev, N.U.
name: Yakubova, N.S.
name: Usmanova, K.I.
name: Yadgarva, D.B.
Publisher: name: Tashkent State Technical University Named after Islam Karimov
Year: 2018

description: A systematic analysis of the existing system of analytical control of technological parameters for the production of soda ash is made. It is investigated as an adaptive control object, which operatively changes its parameters depending on the real state of the controlled technological process. A technique is proposed for determining the frequency of the removal of technological parameters, based on methods of mathematical statistics and based on the analysis of experimental data of a particular process.
Vom Studium in die Kita – wie gelingt der Übergang in den neuen Beruf?
Creators: name: Leineweber, Sabine
Publisher: name: Universität Bremen
Year: 2012
Subjects: subject: Kindertageseinrichtung
subject: Berufseinstieg
subject: 370

description: Es wurde hier an verschiedenen Themen gezeigt, welche Herausforderungen sich am Übergang vom Studium in die praktische Tätigkeit als ElementarpädagogIn in einer Kindertageseinrichtung stellen und was zu deren Bewältigung hilfreich ist. Die hier diskutierten Herausforderungen bilden nur eine exemplarische Auswahl aus der Vielzahl weiterer Anforderungen, die ebenfalls bearbeitet werden müssen, so etwa die Elternarbeit. Zur Unterstützung künftiger BerufseinsteigerInnen wurden deshalb als Handreichung Bausteine zu den wichtigsten Herausforderungen in der Berufseinstiegsphase entwickelt.
ПСИХОЛОГИЧЕСКАЯ КУЛЬТУРА ЛИЧНОСТИ КАК ФАКТОР САМООПРЕДЕЛЕНИЯ В РАННЕМ ЮНОШЕСКОМ ВОЗРАСТЕ
Creators: name: Дубровина Ирина Владимировна
Publisher: name: Гуманизация образования
Year: 2020
Subjects: самоопределение
ранняя юность
психологическая готовность к самоопределению
психологическая культура личности

description: В статье рассматривается актуальная проблема самоопределения школьников, анализируются содержание феномена «самоопределение» и его особенности в раннем юношеском возрасте. Анализируется последовательная и внутренне согласованная взаимозависимость всех аспектов самоопределения. В контексте формирующейся психологической культуры личности обращается внимание на ведущую роль личностного аспекта самоопределения .
Optomechanical-like coupling between superconducting resonators
Creators: name: Johansson, J. R.
name: Johansson, G.
name: Nori, Franco
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose and analyze a circuit that implements a nonlinear coupling between two superconducting microwave resonators. The resonators are coupled through a superconducting quantum interference device (SQUID) that terminates one of the resonators. This produces a nonlinear interaction on the standard optomechanical form, where the quadrature of one resonator couples to the photon number of the other resonator. The circuit therefore allows for all-electrical realizations of analogs to optomechanical systems, with coupling that can be both strong and tunable. We estimate the coupling strengths that should be attainable with the proposed device, and we find that the device is a promising candidate for realizing the single-photon strong-coupling regime. As a potential application, we discuss implementations of networks of nonlinearly-coupled microwave resonators, which could be used in microwave-photon based quantum simulation.
description: 10 pages, 7 figures
Spin-polarized currents generated by magnetic Fe atomic chains
Creators: name: Lin, Zheng-Zhe
name: Chen, Xi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Fe-based devices are widely used in spintronics because of high spin-polarization and magnetism. In this work, free-standing Fe atomic chains were proposed to be used as the thinnest wires to generate spin-polarized currents due to the spin-polarized energy bands. By ab initio calculations, the zigzag structure was found more stable than the wide-angle zigzag structure and has higher ratio of spin-up and spin-down currents. By our theoretical prediction, Fe atomic chains have sufficiently long thermal lifetime only at T<=150 K, while C atomic chains are very stable even at T=1000 K. This result means that the spintronic devices based on Fe chains could only work at low temperature. A system constructed by a short Fe chain sandwiched between two graphene electrodes was proposed as a spin-polarized current generator, while a C chain does not have such property. The present work may be instructive and meaningful to further practical applications based on recent technical development on the preparation of metal atomic chains [Proc. Natl. Acad. Sci. U.S.A. 107, 9055 (2010)].
description: Nanotechnology (2014)
СОВРЕМЕННЫЕ РИСКИ ПРЕПОДАВАТЕЛЕЙ ГУМАНИТАРНЫХ ДИСЦИПЛИН ВЫСШЕЙ ШКОЛЫ В УСЛОВИЯХ МОДЕРНИЗАЦИИ РОССИЙСКОЙ СИСТЕМЫ ОБРАЗОВАНИЯ
Creators: name: Колесникова Галина Ивановна
name: Колесина Карина Юрьевна
name: Самыгин Сергей Иванович
Publisher: name: Гуманизация образования
Year: 2020
Subjects: образование
высшее образования
новации
модернизация
модернизация системы образования
риски
гуманитарные дисциплины
профессорско-преподавательский состав высшей школы

description: Образование – это драйвер социально-экономического развития государства. Авторы статьи в своем исследовании делают акцент на том, что трансформация системы высшего образования требует определенных изменений в работе профессорско-преподавательского состава вузов, особенно это касается преподавателей гуманитарных дисциплин. Процессы трансформации, которые происходят в настоящее время в системе высшего образования, вносят различную степень неопределенности в жизнь участников образовательного процесса, что ведет к различному роду рисков. Авторы статьи выделяют организационно-управленческие риски, информационные риски, компетентностные риски, экономические риски, трудовые риски, отмечая, что любой риск – это фактор, который побуждает преподавателей гуманитарных дисциплин к поиску вариантов адаптации к новым условиям существования.
Das Bremer Begleitangebot zur Berufseinstiegsphase
Creators: name: Leineweber, Sabine
Publisher: name: Universität Bremen
Year: 2012
Subjects: subject: Kindertageseinrichtung
subject: Berufseinstieg
subject: 370

description: Im Jahr 2005 wurde an der Universität Bremen der Bachelor-Studiengang „Fachbezogene Bildungswissenschaften“ (Elementarbereich, Grund und Sekundarstufe) eingeführt. Im Rahmen des Projekts „Profis in Kitas“ (PiK), gefördert von der Robert Bosch Stiftung (Carle o. J.a) wurde für die AbsolventInnen der „Fachbezogenen Bildungswissenschaften mit Schwerpunkt Elementarbereich“ ein Begleitkonzept für einen Berufseinstieg in die Praxis in Kindertageseinrichtungen entwickelt und durchgeführt. Die vorliegende Handreichung entstand im Kontext der Durchführung dieser Berufseinstiegsphase Elementarpädagogik (B.A.) als Modellprojekt der Robert Bosch Stiftung an der Universität Bremen. Das folgende Kapitel gibt Aufschluss über das Projekt und die mit ihm verbundene Entwicklungsarbeit im Feld der Elementarpädagogik in Bremen. Es wird beschrieben, in welchem Kontext die Handreichung entstanden ist, wie die Berufseinstiegsphase an der Universität Bremen zu verorten und wie sie konzipiert ist.
Double-Electromagnetically Induced Transparency in a Y-type atomic system
Creators: name: Safari, L.
name: Iablonskyi, D.
name: Fratini, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study the absorption and dispersion properties of a weak tunable probe field in a four-level Y-type atomic system driven by two strong laser (coupling) fields within the framework of density matrix formalism. It is found that the probe absorption profile displays double-electromagnetically induced transparency (double-EIT) and it is shown how to control it by changing the Rabi frequencies as well as the atom field detuning of the coupling fields.
description: 8 pages
Effect of a magnetic field on the thermodynamic properties of a high-temperature hadron resonance gas with van der Waals interactions
Creators: name: Sahoo, Bhagyarathi
name: Pradhan, Kshitish Kumar
name: Sahu, Dushmanta
name: Sahoo, Raghunath
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the behavior of a hadronic matter in the presence of an external magnetic field within the van der Waals hadron resonance gas model, considering both attractive and repulsive interactions among the hadrons. Various thermodynamic quantities like pressure ($P$), energy density ($\varepsilon$), magnetization ($\mathcal{M}$), entropy density ($s$), squared speed of sound ($c_{\rm s}^{2}$), and specific-heat capacity at constant volume ($c_{v}$) are calculated as functions of temperature ($T$) and static finite magnetic field ($eB$). We also consider the effect of baryochemical potential ($μ_{B}$) on the above-mentioned thermodynamic observables in the presence of a magnetic field. Further, we estimate the magnetic susceptibility ($χ_{\rm M}^{2}$), relative permeability ($μ_{\rm r}$), and electrical susceptibility ($χ_{\rm Q}^{2}$) which can help us to understand the system better. Through this model, we quantify a liquid-gas phase transition in the T-eB-$μ_B$ phase space.
description: Same as the published version in Phys. Rev. D
ПЕРСПЕКТИВЫ И ОСОБЕННОСТИ РАЗВИТИЯ СОВРЕМЕННОЙ РОССИЙСКОЙ СИСТЕМЫ ВЫСШЕГО ОБРАЗОВАНИЯ
Creators: name: Батыршина Альфия Робертовна
name: Зайниев Роберт Махмутович
Publisher: name: Гуманизация образования
Year: 2020
Subjects: высшее образование; двухуровневная система высшего образования; ЕГЭ; качество образования; стандарты образования; примерные программы учебных дисциплин

description: Статья посвящена особенностям развития отечественного высшего образования за последние десятилетия. Изменения, модернизация, происходящие в высшем профессиональном образовании затрагивает не только сферу образования в целом, но и развитие экономики и производства. Внедрение двухуровневой системы высшего образования на практике не может решить ни качество образования, ни прорывное развитие экономики и производства. ЕГЭ в системе общего образования привел в противоречие профориентационной работе и профильному обучению. В статье доказывается, что снижение качества общего образования в школе привело к снижению фундаментальной подготовки студентов вузов, особенно инженерно-технических и естественнонаучных направлений. Одним из наиболее слабых мест в системе высшего и среднего профессионального образования является организация самостоятельной работы обучающихся, ее планирование, формы и методы проведения, система мониторинга и контроля этой работы. Разработанные и утвержденные стандарты высшего образования, по мнению авторов, должны носить не расплывчатый, а конкретный характер. К основным особенностям развития высшего образования за последние десятилетия можно отнести: переход к двухуровневой системе высшего образования; федеральные государственные стандарты общего и профессионального образования рекомендованы дополнить примерными государственными программами по базовым учебным дисциплинам на основе принципа преемственности и профессиональной ориентации; сокращение аудиторного учебного времени сопровождается недостаточной организацией самостоятельной работы обучающихся и контроля ее выполнения; ЕГЭ, введенные в системе общего образования, не может обеспечить ни качество обучения в школе, ни качество обучения в учебных заведениях высшего образования.
СОЦИАЛЬНО-ПСИХОЛОГИЧЕСКИЕ ФАКТОРЫ ГЕОПОЛИТИКИ
Creators: name: Соснин Вячеслав Александрович
name: Китова Джульетта Альбертовна
Publisher: name: Гуманизация образования
Year: 2020
Subjects: геополитика
геописхология
глобальная психология
стратегии сотрудничества
многополярный мир
психологические ресурсы
массовое сознание
геополитические стратегии

description: На современном этапе развития геополитические отношения претерпели глубокие изменения. Современная геополитика характеризуется все возрастающей динамикой трансформации, но и с необходимостью их научного осознания. Для современной геополитики характерно и более широкое толкование геополитических факторов, включая рассмотрение не только географических, но социальных, экономических, национально-этнических и культурно-исторических, а также миграционно-демографических составляющих. Участниками геополитических процессов стали не только наиболее мощные державы, но и различные объединения средних и малых государств, транснациональные корпорации и негосударственные международные организации. Как следствие, на смену наступательным стратегиям, стратегиям соперничества держав приходят геостратегии сдерживания и сотрудничества, интеграции, позволяющие эффективно решать глобальные проблемы. Еще одной тенденцией современного геополитического развития выступает то обстоятельство, что для реализации своих политических интересов в современной геополитике характерно стремление к распространению контроля на виртуальные пространства. Современная геополитическая борьба развернулась за витальный потенциал общества и человека для обеспечения геополитического признания мировоззренческих принципов, пропагандируемых разными государствами. Аналитический обзор позволяет выделить основную психологическую проблематику геополитики: психология управление геополитическими процессами, выявление стереотипов восприятия населением, образа различных стран, исследование геополитических поведенческих моделей групп и сообществ, противодействие глобальным психологическим угрозам, и т.д. Важный итог связан с тем, что массовое сознание необходимо рассматривать как важный ресурс геополитического развития. Без понимания психологической природы, направленности и динамики настроений и ожиданий людей, реализация геополитических стратегий не принесет ожидаемого практического эффекта.
Quantum longitudinal and Hall transport at the LaAlO3/SrTiO3 interface at low electron densities
Creators: name: Xie, Yanwu
name: Bell, Christopher
name: Kim, Minu
name: Inoue, Hisashi
name: Hikita, Yasuyuki
name: Hwang, Harold Y.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We examined the magneto-transport behavior of electrons confined at the conducting LaAlO3/SrTiO3 interface in the low sheet carrier density regime. We observed well resolved Shubnikov-de Haas quantum oscillations in the longitudinal resistance, and a plateau-like structure in the Hall conductivity. The Landau indices of the plateaus in the Hall conductivity data show spacing close to 4, in units of the quantum of conductance. These experimental features can be explained by a magnetic breakdown transition, which quantitatively explains the area, structure, and degeneracy of the measured Fermi surface.
description: 16 pages, 4 figures and 1 table