cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dissipative Kerr solitons and Cherenkov radiation in optical microresonators with third order dispersion
Creators: name: Cherenkov, Artem
name: Lobanov, Valery
name: Gorodetsky, Michael
Publisher: name: arXiv
Year: 2017
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We present the results of asymptotic and numerical analysis of dissipative Kerr solitons in whispering gallery mode microresonators influenced by higher order dispersive terms leading to the appearance of a dispersive wave (Cherenkov radiation). Combining direct perturbation method with the method of moments we find expressions for the frequency, strength, spectral width of the dispersive wave and soliton velocity. Mutual influence of the soliton and dispersive wave was studied. The formation of the dispersive wave leads to a shift of the soliton spectrum maximum from the pump frequency (spectral recoil), while the soliton displaces the dispersive wave spectral peak from the zero dispersion point.
description: 8 pages, 3 figures
Multi-objective Bayesian optimization for design of Pareto-optimal current drive profiles in STEP
Creators: name: Brown, Theodore
name: Marsden, Stephen
name: Gopakumar, Vignesh
name: Terenin, Alexander
name: Ge, Hong
name: Casson, Francis
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The safety factor profile is a key property in determining the stability of tokamak plasmas. To design the safety factor profile in the United Kingdom's proposed Spherical Tokamak for Energy Production (STEP), we apply multi-objective Bayesian optimisation to design electron-cyclotron heating profiles. Bayesian optimisation is an iterative machine learning technique that uses an uncertainty-aware predictive model to choose the next designs to evaluate based on the data gathered during optimisation. By taking a multi-objective approach, the optimiser generates sets of solutions that represent optimal tradeoffs between objectives, enabling decision makers to understand the compromises made in each design. The solutions from our method score higher than those generated in previous work by a genetic algorithm; however, the key result is that our method returns a purposefully diverse range of optimal solutions, providing more information to tokamak designers without incurring additional computational cost.
description: 6 pages, 4 figures. Submitted to IEEE Transactions on Plasma Science, October 2023. Revised version submitted 7th February 2024
EFTofLSS meets simulation-based inference: $σ_8$ from biased tracers
Creators: name: Tucci, Beatriz
name: Schmidt, Fabian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Cosmological inferences typically rely on explicit expressions for the likelihood and covariance of the data vector, which normally consists of a set of summary statistics. However, in the case of nonlinear large-scale structure, exact expressions for either likelihood or covariance are unknown, and even approximate expressions can become very cumbersome, depending on the scales and summary statistics considered. Simulation-based inference (SBI), in contrast, does not require an explicit form for the likelihood but only a prior and a simulator, thereby naturally circumventing these issues. In this paper, we explore how this technique can be used to infer $σ_8$ from a Lagrangian effective field theory (EFT) based forward model for biased tracers. The power spectrum and bispectrum are used as summary statistics to obtain the posterior of the cosmological, bias and noise parameters via neural density estimation. We compare full simulation-based inference with cases where the data vector is drawn from a Gaussian likelihood with sample and analytical covariances. We conclude that, for $k_{\text{max}}=0.1h\text{Mpc}^{-1}$ and $0.2h\text{Mpc}^{-1}$, the form of the covariance is more important than the non-Gaussianity of the likelihood, although this conclusion is expected to depend on the cosmological parameter inferred, the summary statistics considered and range of scales probed.
description: 42 pages, 17 figures
Decrease of the organic deuteration during the evolution of Sun-like protostars: the case of SVS13-A
Creators: name: Bianchi, E.
name: Codella, C.
name: Ceccarelli, C.
name: Fontani, F.
name: Testi, L.
name: Bachiller, R.
name: Lefloch, B.
name: Podio, L.
name: Taquet, V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the results of formaldehyde and methanol deuteration measurements towards the Class I low-mass protostar SVS13-A, in the framework of the IRAM 30-m ASAI (Astrochemical Surveys At IRAM) project. We detected emission lines of formaldehyde, methanol, and their deuterated forms (HDCO, D2CO, CHD2OH, CH3OD) with Eup up to 276 K. The formaldehyde analysis indicates Tkin = 15 - 30 K, n (H2) >= 10^6 cm^-3, and a size of about 1200 AU suggesting an origin in the protostellar envelope. For methanol we find two components: (i) a high temperature (Tkin = 80 K) and very dense (> 10^8 cm^-3}) gas from a hot corino (radius about 35 AU), and (ii) a colder Tkin <= 70 K) and more extended (radius about 350 AU) region. The deuterium fractionation is 9 10^-2 for HDCO, 4 10^-3 for D2CO, and 2 - 7 10^-3 for CH2DOH, up to two orders of magnitude lower than the values measured in Class 0 sources. We derive also formaldehyde deuteration in the outflow: 4 10^-3, in agreement with what found in the L1157-B1 protostellar shock. Finally, we estimate [CH2DOH]/[CH3OD] about 2. The decrease of deuteration in the Class I source SVS13-A with respect to Class 0 sources can be explained by gas-phase processes. Alternatively, a lower deuteration could be the effect of a gradual collapse of less deuterated external shells of the protostellar evelope. The present measurements fill in the gap between prestellar cores and protoplanetary disks in the context of organics deuteration measurements.
description: MNRASS, in press, 13 pages, 10 figures
Optimal quantum tomography
Creators: name: Bisio, Alessandro
name: Chiribella, Giulio
name: D'Ariano, Giacomo Mauro
name: Facchini, Stefano
name: Perinotti, Paolo
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The present short review article illustrates the latest theoretical developments on quantum tomography, regarding general optimization methods for both data-processing and setup. The basic theoretical tool is the informationally complete measurement. The optimization theory for the setup is based on the new theoretical approach of quantum combs.
description: 14 pages, 3 figures
Mode-Shell correspondence, a unifying phase space theory in topological physics -- Part I: Chiral number of zero-modes
Creators: name: Jezequel, Lucien
name: Delplace, Pierre
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose a theory, that we call the \textit{mode-shell correspondence}, which relates the topological zero-modes localised in phase space to a \textit{shell} invariant defined on the surface forming a shell enclosing these zero-modes. We show that the mode-shell formalism provides a general framework unifying important results of topological physics, such as the bulk-edge correspondence, higher-order topological insulators, but also the Atiyah-Singer and the Callias index theories. In this paper, we discuss the already rich phenomenology of chiral symmetric Hamiltonians where the topological quantity is the chiral number of zero-dimensionial zero-energy modes. We explain how, in a lot of cases, the shell-invariant has a semi-classical limit expressed as a generalised winding number on the shell, which makes it accessible to analytical computations.
description: 74 pages, 20 figures
[WHITE PAPER] A Spin-based Re-interpretation of the Periodic Table (2022)
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 340199
subject: Analytical chemistry not elsewhere classified
classificationCode: 340799
subject: Theoretical and computational chemistry not elsewhere classified
classificationCode: 340699
subject: Physical chemistry not elsewhere classified

description: The hypothesis of this paper is that contemporary knowledge in quantum mechanics (energy levels and orbital dispositions) should allow the construction of a more integrated and meaningful periodic representation of an atom (other than Mendeleev’s original). A novel approach that models electrons as triangles is presented. Triangles determine electron’s spin (up or down) and govern their fitting into (sub)shells. The result is the Spin-based Periodic Structure. Starting at the nucleus (Period/Group 0), it evolves energetically outwardly with guidance from the quantum numbers. The model favors spin over atomic number when organizing the elements, and as a result, the model collapses all available thermal and electrical conductivity data of the elements into one continuous peak for the transition metals, and one axis of instability for the entire electron-cloud structure.-------------------------------------------------------------------------For more public data, please visit my Figshare profile: https://figshare.com/authors/Luis_Teia/10811244
[WHITE PAPER] A Spin-based Re-interpretation of the Periodic Table (2022)
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 340199
subject: Analytical chemistry not elsewhere classified
classificationCode: 340799
subject: Theoretical and computational chemistry not elsewhere classified
classificationCode: 340699
subject: Physical chemistry not elsewhere classified

description: ABSTRACT The hypothesis of this paper is that contemporary knowledge in quantum mechanics (energy levels and orbital dispositions) should allow the construction of a more integrated and meaningful periodic representation of an atom (other than Mendeleev’s original). A novel approach that models electrons as triangles is presented. Triangles determine electron’s spin (up or down) and govern their fitting into (sub)shells. The result is the Spin-based Periodic Structure. Starting at the nucleus (Period/Group 0), it evolves energetically outwardly with guidance from the quantum numbers. The model favors spin over atomic number when organizing the elements, and as a result, the model collapses all available thermal and electrical conductivity data of the elements into one continuous peak for the transition metals, and one axis of instability for the entire electron-cloud structure.
Domination number and minimum dominating sets in pseudofractal scale-free web and Sierpiński graph
Creators: name: Shan, Liren
name: Li, Huan
name: Zhang, Zhongzhi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Social and Information Networks (cs.SI)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: The minimum dominating set (MDS) problem is a fundamental subject of theoretical computer science, and has found vast applications in different areas, including sensor networks, protein interaction networks, and structural controllability. However, the determination of the size of a MDS and the number of all MDSs in a general network is NP-hard, and it thus makes sense to seek particular graphs for which the MDS problem can be solved analytically. In this paper, we study the MDS problem in the pseudofractal scale-free web and the Sierpiński graph, which have the same number of vertices and edges. For both networks, we determine explicitly the domination number, as well as the number of distinct MDSs. We show that the pseudofractal scale-free web has a unique MDS, and its domination number is only half of that for the Sierpiński graph, which has many MDSs. We argue that the scale-free topology is responsible for the difference of the size and number of MDSs between the two studied graphs, which in turn indicates that power-law degree distribution plays an important role in the MDS problem and its applications in scale-free networks.
ТЕMPERAMENTNING YURAK FAOLIYATIGA TA'SIRI
Creators: name: Isroiljanov, S.
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada temperamentning inson tanasidagi to‘rtta unsurning qaysi biri ustunlik qilishi bilan belgilanishi tahlil qilingan. Shaxsning o‘ziga xos xususiyatlari, ya’ni, tezlik, temp, ritm, intensivlik temperament va aqlin faoliyuatni tashkil etuvchi psixik jarayon va holat ekanligi isbotlangan.
AXBOROT SOHASIDAГИ KIBERJINOYATCHILIKNING OMMAVIY TARQALGAN SHAKLLARIDAN HIMOYALANISH USULLARI
Creators: name: Raxmonov, Shaxobiddin
Publisher: name: Zenodo
Year: 2024

description: Maqolada muallif tomonidan kiberjinoyatning eng keng tarqalgan shakllaridan himoya qilishga yordam beradigan ba'zi ehtiyot choralari keltirilgan.
Missed surface waves in non-piezoelectric solids
Creators: name: Eliseev, Eugene A.
name: Morozovska, Anna N.
name: Glinchuk, Maya D.
name: Kalinin, Sergei V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The physical processes taking place at the surface and near the surface of solids is so rich and versatile that sometimes they seem to be the inexhaustible subject of fundamental research. In particular, since the discovery by Lord Rayleigh surface waves in solids focus increased attention of scientists, because their experimental and theoretical studies can serve as the source of unique information about the surface impact on the dynamics and structure of the atomic lattice, structural instabilities and phase transitions induced by the surface, and explore the properties of phonons in spatially-confined systems The existence of purely shear surface wave is impossible in non-piezoelectrics within the framework of the classical theory of elasticity, because the Rayleigh surface waves have different polarization and are the mixture of shear and dilatational waves. We showed that the "forbidden" shear surface wave (shortly Flexo-SW) can propagate near the surface of all crystalline dielectrics due to the omnipresent flexoelectric coupling. The appearance and penetration depth of the Flexo-SW is ruled by the flexocoupling strength. In particular the penetration depth of transverse acoustic mode diverges in the absence of the flexoelectric coupling and so these waves become indistinguishable from the bulk waves. For paraelectrics such as strontium titanate with typical flexoeletric coefficients (~2V) the penetration depth of the Flexo-SW can reach more than tens microns at THz frequencies. The circumstances can explain the absence of experimental observations of the missed surface waves in thick layers and bulk materials. However we predict that the peaks of neutron intensity corresponding to the surface Flexo-SW and bulk phonon modes can be separated in non-piezoelectric thin films of thickness ~(20 - 50)nm.
description: 30 pages, 6 figures, including Supplement
Sensitivity-Aware Amortized Bayesian Inference
Creators: name: Elsemüller, Lasse
name: Olischläger, Hans
name: Schmitt, Marvin
name: Bürkner, Paul-Christian
name: Köthe, Ullrich
name: Radev, Stefan T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Sensitivity analyses reveal the influence of various modeling choices on the outcomes of statistical analyses. While theoretically appealing, they are overwhelmingly inefficient for complex Bayesian models. In this work, we propose sensitivity-aware amortized Bayesian inference (SA-ABI), a multifaceted approach to efficiently integrate sensitivity analyses into simulation-based inference with neural networks. First, we utilize weight sharing to encode the structural similarities between alternative likelihood and prior specifications in the training process with minimal computational overhead. Second, we leverage the rapid inference of neural networks to assess sensitivity to data perturbations and preprocessing steps. In contrast to most other Bayesian approaches, both steps circumvent the costly bottleneck of refitting the model for each choice of likelihood, prior, or data set. Finally, we propose to use deep ensembles to detect sensitivity arising from unreliable approximation (e.g., due to model misspecification). We demonstrate the effectiveness of our method in applied modeling problems, ranging from disease outbreak dynamics and global warming thresholds to human decision-making. Our results support sensitivity-aware inference as a default choice for amortized Bayesian workflows, automatically providing modelers with insights into otherwise hidden dimensions.
description: Published in TMLR (2024)
Elastic properties and mechanical tension of graphene
Creators: name: Ramirez, R.
name: Herrero, C. P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Room temperature simulations of graphene have been performed as a function of the mechanical tension of the layer. Finite-size effects are accurately reproduced by an acoustic dispersion law for the out-of-plane vibrations that, in the long-wave limit, behaves as $ρω^2=σk^2+κk^4$. The fluctuation tension $σ$ is finite ($\sim 0.1$ N/m) even when the external mechanical tension vanishes. Transverse vibrations imply a duplicity in the definition of the elastic constants of the layer, as observables related to the real area of the surface may differ from those related to the in-plane projected area. This duplicity explains the variability of experimental data on the Young modulus of graphene based on electron spectroscopy, interferometric profilometery, and indentation experiments.
description: 6 pages, 4 figures
Quantum vortex lattice: Lifshitz duality, topological defects and multipole symmetries
Creators: name: Du, Yi-Hsien
name: Lam, Ho Tat
name: Radzihovsky, Leo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study an effective field theory of a vortex lattice in a two-dimensional neutral rotating superfluid. Utilizing particle-vortex dualities, we explore its formulation in terms of a $U(1)$ gauge theory coupled to elasticity, that at low energies reduces to a compact Lifshitz theory augmented with a Berry phase term encoding the vortex dynamics in the presence of a superflow. Utilizing elasticity- and Lifshitz-gauge theory dualities, we derive dual formulations of the vortex lattice in terms of a traceless symmetric scalar-charge theory and demonstrate low-energy equivalence of our dual gauge theory to its elasticity-gauge theory dual. We further discuss a multipole symmetry of the vortex lattice and its dual gauge theory's multipole one-form symmetries. We also study its topological crystalline defects, where the multipole one-form symmetry plays a prominent role. It classifies the defects, explains their restricted mobility, and characterizes descendant vortex phases, which includes a novel vortex supersolid phase. Using the dual gauge theory, we also develop a mean-field theory for the quantum melting transition from a vortex crystal to a vortex supersolid.
description: 19 pages, 1 figure. v2: published version
Degenerate billiards in celestial mechanics
Creators: name: Bolotin, Sergey
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37D05, 37D50, 37J10, 70F15, 70F16

description: In an ordinary billiard trajectories of a Hamiltonian system are elastically reflected after a collision with a hypersurface (scatterer). If the scatterer is a submanifold of codimension more than one, we say that the billiard is degenerate. Degenerate billiards appear as limits of systems with singularities in celestial mechanics. We prove the existence of trajectories of such systems shadowing trajectories of the corresponding degenerate billiards. This research is motivated by the problem of second species solutions of Poincaré.
description: arXiv admin note: text overlap with arXiv:1606.06708
A non-unitary bulk-boundary correspondence: Non-unitary Haagerup RCFTs from S-fold SCFTs
Creators: name: Gang, Dongmin
name: Kim, Dongyeob
name: Lee, Sungjay
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a novel class of two-dimensional non-unitary rational conformal field theories (RCFTs) whose modular data are identical to the generalized Haagerup-Izumi modular data. Via the bulk-boundary correspondence, they are related to the three-dimensional non-unitary Haagerup topological field theories, recently constructed by a topological twisting of three-dimensional ${\cal N}=4$ rank-zero superconformal field theories (SCFTs), called S-fold SCFTs. We propose that, up to the overall factors, the half-indices of the rank-zero SCFTs give the explicit Nahm representation of four conformal characters of the RCFTs including the vacuum character. Using the theory of Bantay-Gannon, we can successfully complete them into the full admissible conformal characters of the RCFTs.
description: 41 pages
ЛИРИЧЕСКИЙ ТЕКСТ - ЭТО МНОГОСМЫСЛОВОЕ ПРОСТРАНСТВО
Creators: name: Халиков, Насриддин
name: Хаитов, Хурсанд
name: Боймуродов, Жуманазар
Publisher: name: Zenodo
Year: 2024

description: Статья нацелено на профессиональную подготовку современного учителя литературы, постигающего закономерности художественной коммуникации. Тем не менее анализ лирического текста - это разработанная сфера теории литературы, имеющая свой тезаурус, своё языковое поле. В статье показано как учить школьников языку анализа лирики. Важными для школы являются теоретические разработки о доминантах лирического текста.
Guaranteed Coverage Prediction Intervals with Gaussian Process Regression
Creators: name: Papadopoulos, Harris
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Gaussian Process Regression (GPR) is a popular regression method, which unlike most Machine Learning techniques, provides estimates of uncertainty for its predictions. These uncertainty estimates however, are based on the assumption that the model is well-specified, an assumption that is violated in most practical applications, since the required knowledge is rarely available. As a result, the produced uncertainty estimates can become very misleading; for example the prediction intervals (PIs) produced for the 95% confidence level may cover much less than 95% of the true labels. To address this issue, this paper introduces an extension of GPR based on a Machine Learning framework called, Conformal Prediction (CP). This extension guarantees the production of PIs with the required coverage even when the model is completely misspecified. The proposed approach combines the advantages of GPR with the valid coverage guarantee of CP, while the performed experimental results demonstrate its superiority over existing methods.
description: 12 pages. This article has been accepted for publication in IEEE Transactions on Pattern Analysis and Machine Intelligence. This is the author's version which has not been fully edited and content may change prior to final publication. Citation information: DOI 10.1109/TPAMI.2024.3418214
BO'LAJAK INFORMATIKA O'QITUVCHISI KOMPENTLIGINI TARBIYALASh TEXNOLOGIYASINI  TAKOMILAShTIRIShNING NAZARIY  ASOSLARI
Creators: name: Eshaliyev, O'tkir
Publisher: name: Zenodo
Year: 2024

description: Maqolada informatika va raqamli texnologiyalarni o‘qitishning kompetentliginit arbiyalash   texnologiyasini takomillashtirishda foydalanish tajribasi ko‘rib chiqiladi. Informatika kompetentligini  tarbiyalash   texnologiyasini takomillashtirish ta’lim sifatini oshirishga va bo‘lajak informatika o‘kituvchilarning kasbiy komponentligini shakllantirishga ta’siri tahlil etildi.
Spin and Charge Fluctuations near Metal-Insulator Transition in Dimer-Type Molecular Solid
Creators: name: Sato, Naomichi
name: Watanabe, Tsutomu
name: Naka, Makoto
name: Ishihara, Sumio
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spin and charge fluctuations at vicinity of metal-to-Mott insulator transitions are studied in an organic solid with molecular dimers. The extended Hubbard model taking account of the internal electronic degree of freedom in a molecular dimer is analyzed using the variational Monte Carlo method. Three kinds of the electronic phases, i.e. a metallic phase, an antiferromagnetic insulating phase and a polar charge ordered phase, compete with each other in the ground state. It is found that the polar-charge fluctuation is dominant in a wide range of the molecular dimerization and Coulomb interaction amplitudes, and is enhanced remarkably near the metal-insulator phase boundary, in which the spin fluctuation is almost unchanged. Implication for the $κ$-type BEDT-TTF salts is discussed.
description: 5 pages, 5 figures, to be published in J. Phys. Soc. Jpn
Introducing AstroGen: The Astronomy Genealogy Project
Creators: name: Tenn, Joseph S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The Astronomy Genealogy Project ("AstroGen"), a project of the Historical Astronomy Division of the American Astronomical Society (AAS), will soon appear on the AAS website. Ultimately, it will list the world's astronomers with their highest degrees, theses for those who wrote them, academic advisors (supervisors), universities, and links to the astronomers or their obituaries, their theses when on-line, and more. At present the AstroGen team is working on those who earned doctorates with astronomy-related theses. We show what can be earned already, with just ten countries essentially completed.
description: 7 pages
On the convex Poincaré inequality and weak transportation inequalities
Creators: name: Adamczak, Radosław
name: Strzelecki, Michał
Publisher: name: arXiv
Year: 2017
Subjects: subject: Probability (math.PR)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary: 60E15. Secondary: 26B25, 26D10

description: We prove that for a probability measure on $\mathbb{R}^n$, the Poincaré inequality for convex functions is equivalent to the weak transportation inequality with a quadratic-linear cost. This generalizes recent results by Gozlan et al. and Feldheim et al., concerning probability measures on the real line. The proof relies on modified logarithmic Sobolev inequalities of Bobkov-Ledoux type for convex and concave functions, which are of independent interest. We also present refined concentration inequalities for general (not necessarily Lipschitz) convex functions, complementing recent results by Bobkov, Nayar and Tetali.
description: v2: 26 pages, Remark 6.8. slightly modified, Theorem 7.2. added
[PROOF | SINGLE-PAGE] Hexagon, the Diagonal Face of a Cube
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 490402
subject: Algebraic and differential geometry
classificationCode: 490499
subject: Pure mathematics not elsewhere classified

description: This single-page proof (below) succinctly explains how the three-dimensional equivalent of the two-dimensional diagonal line of a square is the diagonal hexagonal face of a cube.---------------------------------------------------------------------------------------------------------------
REASONINGIn two dimensions (Figure 1a), joining the extreme edges of a square A and B gives line AB. Drawing a perpendicular line to AB, passing through the center of the square at point C, results in the other diagonal line ED. In three dimensions, joining two opposing edges of a cube A' and B' gives the diagonal line A'B'. Intersecting the plane that is perpendicular to line A'B', and passes through the center point C of the cube, gives the diagonal face of the cube - that is hexagon EE'E''DD'D'' (Figure 1b). Note that the two- and three-dimensional fields are interrelated, as the line AB is the two-dimensional projection of the 3D line A'B'. Applying this projection into the other two orthogonal directions results in the hexagon EE'E''DD'D'' being defined by the ensemble of the three diagonal lines along each orthogonal plane (i.e., ED, E'D' and E''D'' shown in Figure 1b). Finally, this framework allows the conclusion that just as two opposing isosceles right-angled triangles I and II (in Figure 1c) join at their diagonal line forming a square, in the same manner two opposing right-angled truncated tetrahedrons (each shaped internally by three right-angled triangles I or II, one in each orthogonal plane ― as shown in Figure 1d) join at the diagonal hexagonal faces forming a cube.---------------------------------------------------------------------------------------------------------------Further details about how this finding pertains to the three-dimensional Pythagoras theorem (herein termed the Universal Gear) is found on the following Australian journal article:https://www.researchgate.net/publication/339004372_Universal_Gear_and_the_Pythagorean_Theorem_Australian_Mathematics_Education_Journal-------------------------------------------------------------------------For more public data, please visit my Figshare profile: https://figshare.com/authors/Luis_Teia/10811244
ОСОБЕННОСТИ КОРРЕКЦИИ НАРУШЕНИЙ МЕНСТРУАЛЬНОЙ ФУНКЦИИ У ЖЕНЩИН РЕПРОДУКТИВНОГО ВОЗРАСТА
Creators: name: Ахмедова, Азиза
name: Расулова, Феруза
name: Муратова, Ноила
name: Муинова, Замира
Publisher: name: Zenodo
Year: 2024

description: Нарушения ритма менструаций и симптомы, связанные с менструальным циклом, являются одной из главных причин обращения женщин к гинекологу. После исключения эндокринопатий и органических субстратов менструальных нарушений врач встает перед непростой задачей лечения состояний, которые отражают функциональное неблагополучие организма и его приспособление к высокой стрессовой нагрузке. Гормональная терапия, бесспорно, является основным ресурсом врача-гинеколога, но она не всегда приемлема и решает далеко не все задачи по нормализации психо-нейро-эндокринного статуса. Зависимость функциональных нарушений от стрессовых факторов внешней среды позволяет использовать коррекцию образа жизни, включая рациональное питание и дотацию разнообразных микронутриентов, в программе улучшения качества жизни, устранения психоэмоциональных симптомов и признаков вегетативной дисфункции.
Simulation study of overtaking of ion-acoustic solitons in the fully kinetic regime
Creators: name: Jenab, S. M. Hosseini
name: Spanier, F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The overtaking collisions of ion-acoustic solitons (IASs) in presence of trapping effects of electrons are studied based on a fully kinetic simulation approach. The method is able to provide all the kinetic details of the process alongside the fluid-level quantities self consistently. Solitons are produced naturally by utilizing the chain formation phenomenon, then are arranged in a new simulation box to test different scenarios of overtaking collisions. Three achievements are reported here. Firstly, simulations prove the long-time life span of the ion-acoustic solitons in the presence of trapping effect of electrons (kinetic effects), which serves as the benchmark of the simulation code. Secondly, their stability against overtaking mutual collisions is established by creating collisions between solitons with different number and shapes of trapped electrons, i.e. different trapping parameter. Finally, details of solitons during collisions for both ions and electrons are provided on both fluid and kinetic levels. These results show that on the kinetic level, trapped electron population accompanying each of the solitons are exchanged between the solitons during the collision. Furthermore, the behavior of electron holes accompanying solitons contradicts the theory about the electron holes interaction developed based on kinetic theory. They also show behaviors much different from other electron holes witnessed in processes such as nonlinear Landau damping (Bernstein-Greene-Kruskal -BGK- modes) or beam-plasma interaction (like two-beam instability).
description: 9 pages, 11 figures, accepted for publication in Physics of Plasmas
Two-dimensional compressible viscous flow around a circular cylinder
Creators: name: Canuto, Daniel
name: Taira, Kunihiko
Publisher: name: arXiv
Year: 2017
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Direct numerical simulation is performed to study compressible, viscous flow around a circular cylinder. The present study considers two-dimensional, shock-free continuum flow by varying the Reynolds number between 20 and 100 and the freestream Mach number between 0 and 0.5. The results indicate that compressibility effects elongate the near wake for cases above and below the critical Reynolds number for two-dimensional flow under shedding. The wake elongation becomes more pronounced as the Reynolds number approaches this critical value. Moreover, we determine the growth rate and frequency of linear instability for cases above the critical Reynolds number. From the analysis, it is observed that the frequency of the Bénard-von Kármán vortex street in the time-periodic, fully-saturated flow increases from the dominant unstable frequency found from the linear stability analysis as the Reynolds number increases from its critical value, even for the low range of Reynolds numbers considered. We also notice that the compressibility effects reduce the growth rate and dominant frequency in the linear growth stage. Semi-empirical functional relationships for the growth rate and the dominant frequency in linearized flow around the cylinder in terms of the Reynolds number and freestream Mach number are presented.
description: 24 pages, 14 figures, 6 tables
Low-redshift Lyman Continuum Survey: Radio continuum properties of low-$z$ Lyman continuum emitters
Creators: name: Bait, Omkar
name: Borthakur, Sanchayeeta
name: Schaerer, Daniel
name: Momjian, Emmanuel
name: Sebastian, Biny
name: Saldana-Lopez, Alberto
name: Flury, Sophia R.
name: Chisholm, John
name: Marques-Chaves, Rui
name: Jaskot, Anne E.
name: Ferguson, Harry C.
name: Worseck, Gabor
name: Ji, Zhiyuan
name: Komarova, Lena
name: Trebitsch, Maxime
name: Hayes, Matthew J.
name: Pentericci, Laura
name: Ostlin, Goran
name: Thuan, Trinh
name: Amorín, Ricardo O.
name: Wang, Bingjie
name: Xu, Xinfeng
name: Sargent, Mark T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Sources that leak Lyman-continuum (LyC) photons and lead to the reionisation of the universe are intensely studied using multiple observing facilities. Recently, the Low-redshift LyC Survey (LzLCS) has found the first large sample of LyC emitting galaxies at low redshift ($z\sim 0.3$) with the Hubble Space Telescope/Cosmic Origins Spectrograph. The LzLCS sample contains a robust estimate of the LyC escape fraction ($f_\mathrm{esc}^\mathrm{LyC}$) for 66 galaxies spanning a wide range of $f_\mathrm{esc}^\mathrm{LyC}$. Here we, for the first time, aim to study the radio continuum (RC) properties of LzLCS sources and their dependence on $f_\mathrm{esc}^\mathrm{LyC}$. We present Karl G. Jansky Very Large Array RC observations at C (4-8 GHz), S (2-4 GHz) and L (1-2 GHz) bands for a sub-sample of the LzLCS sources. The radio spectral index ($α^{\mathrm{3GHz}}_\mathrm{6GHz}$) spans a wide range from being flat ( $\geq -0.1$) to very steep ($\leq -1.0$). The strongest leakers in our sample show flat $α^{\mathrm{3GHz}}_\mathrm{6GHz}$, weak leakers have $α^{\mathrm{3GHz}}_\mathrm{6GHz}$ close to normal star-forming galaxies, and non-leakers are characterized by steep $α^{\mathrm{3GHz}}_\mathrm{6GHz}$. We argue that a combination of young ages, free-free absorption, and a flat cosmic-ray energy spectrum can altogether lead to a flat $α^{\mathrm{3GHz}}_\mathrm{6GHz}$ for strong leakers. Non-leakers are characterized by steep spectra which can arise due to break/cutoff at high frequencies. Such a cutoff in the spectrum can arise in a single injection model of CRs characteristic of galaxies which have recently stopped star formation. Such a relation between $α^{\mathrm{3GHz}}_\mathrm{6GHz}$ and $f_\mathrm{esc}^\mathrm{LyC}$ hints at the interesting role of supernovae, CRs, and magnetic fields in facilitating the escape ( and/or the lack) of LyC photons. (Abridged)
description: 20 pages, 17 figures, 4 tables, 8 appendix pages, Astronomy & Astrophysics in press
Shot noise in a harmonically driven ballistic graphene transistor
Creators: name: Korniyenko, Yevgeniy
name: Shevtsov, Oleksii
name: Lofwander, Tomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study time-dependent electron transport and quantum noise in a ballistic graphene field effect transistor driven by an ac gate potential. The non-linear response to the ac signal is computed through Floquet theory for scattering states and Landauer-Büttiker theory for charge current and its fluctuations. Photon-assisted excitation of a quasibound state in the top-gate barrier leads to resonances in transmission that strongly influence the noise properties. For strong doping of graphene under source and drain contacts, when electrons are transmitted through the channel via evanescent waves, the resonance leads to a substantial suppression of noise. The Fano factor is then reduced well below the pseudo-diffusive value, $F<1/3$, also for strong ac drive. The good signal-to-noise ratio (small Fano factor) on resonance suggests that the device is a good candidate for high-frequency (THz) radiation detection. We show analytically that Klein tunneling (total suppression of back-reflection) persists for perpendicular incidence also when the barrier is driven harmonically. Although the transmission is inelastic and distributed among sideband energies, a sum rule leads to total suppression of shot noise.
description: 12 pages, 7 figures
One- and Two-Way Relay Optimization for MIMO Interference Networks
Creators: name: Khandaker, Muhammad R A
name: Wong, Kai-Kit
Publisher: name: arXiv
Year: 2017
Subjects: subject: Information Theory (cs.IT)
subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: This paper considers multiple-input multiple-output (MIMO) relay communication in multi-cellular (interference) systems in which MIMO source-destination pairs communicate simultaneously. It is assumed that due to severe attenuation and/or shadowing effects, communication links can be established only with the aid of a relay node. The aim is to minimize the maximal mean-square-error (MSE) among all the receiving nodes under constrained source and relay transmit powers. Both one- and two-way amplify-and-forward (AF) relaying mechanisms are considered. Since the exactly optimal solution for this practically appealing problem is intractable, we first propose optimizing the source, relay, and receiver matrices in an alternating fashion. Then we contrive a simplified semidefinite programming (SDP) solution based on the error covariance matrix decomposition technique, avoiding the high complexity of the iterative process. Numerical results reveal the effectiveness of the proposed schemes.
description: Accepted in EURASIP Journal on Advances in Signal Processing
Evolutionary phases of gas-rich galaxies in a galaxy cluster at z=1.46
Creators: name: Hayashi, Masao
name: Kodama, Tadayuki
name: Kohno, Kotaro
name: Yamaguchi, Yuki
name: Tadaki, Ken-ichi
name: Hatsukade, Bunyo
name: Koyama, Yusei
name: Shimakawa, Rhythm
name: Tamura, Yoichi
name: Suzuki, Tomoko L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a survey of molecular gas in galaxies in the XMMXCS J2215.9-1738 cluster at $z=1.46$. We have detected emission lines from 17 galaxies within a radius of $R_{200}$ from the cluster center, in Band 3 data of the Atacama Large Millimeter/submillimeter Array (ALMA) with a coverage of 93 -- 95 GHz in frequency and 2.33 arcmin$^2$ in spatial direction. The lines are all identified as CO $J$=2--1 emission lines from cluster members at $z\sim1.46$ by their redshifts and the colors of their optical and near-infrared (NIR) counterparts. The line luminosities reach down to $L'_{\rm CO(2-1)}=4.5\times10^{9}$ K km s$^{-1}$ pc$^2$. The spatial distribution of galaxies with a detection of CO(2--1) suggests that they disappear from the very center of the cluster. The phase-space diagram showing relative velocity versus cluster-centric distance indicates that the gas-rich galaxies have entered the cluster more recently than the gas-poor star-forming galaxies and passive galaxies located in the virialized region of this cluster. The results imply that the galaxies have experienced ram-pressure stripping and/or strangulation during the course of infall towards the cluster center and then the molecular gas in the galaxies at the cluster center is depleted by star formation.
description: 7 pages, 4 figures, 1 table, accepted for publication in the ApJ Letters
Reliability Modeling and Analysis of Communication Networks
Creators: name: Ahmed, Waqar
name: Hasan, Osman
name: Pervez, Usman
name: Qadir, Junaid
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In recent times, the functioning of various aspects of modern society---ranging from the various infrastructural utilities such as electrical power, water to socio-economical aspects such as telecommunications, business, commerce, education---has become critically reliant on communication networks, and particularly on the Internet. With the migration of critical facilities to the Internet, it has become vitally important to ensure the reliability and availability of networks. In this paper, we study various modeling and analysis techniques that can aid in the study of reliability of communication networks. In this regard, we provide background on the modeling techniques (such as reliability block diagrams, fault trees, Markov chains, etc.) and analysis techniques (such as mathematical analytical methods, simulation methods, and formal methods). Apart from providing the necessary background, we also critically evaluate the pros and cons of different approaches, and provide a detailed survey of their applications in communication networks. To the best of our knowledge, this is the first in-depth review of the application of reliability modeling and analysis techniques in communication networks.
description: 82
A graduate laboratory experiment to set up a photon-counting detector using MKIDs
Creators: name: Campana, Pietro
name: Carobene, Rodolfo
name: Cipelli, Eleonora
name: Gobbo, Marco
name: Perego, Aurora
name: Vertemati, Davide
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: This paper presents a new laboratory activity aimed at developing knowledge and expertise in microwave applications at cryogenic temperatures. The experience focuses on the detection of infrared photons through Microwave Kinetic Inductance Detectors (MKIDs). The experimental setup, theoretical concepts, and activities involved are detailed, highlighting the skills and knowledge gained through the experience. This experiment is designed for graduate students in the field of quantum technologies.
description: 18 pages, 11 figures, 1 box, submitted to European Journal of Physics
Bayesian Modelling of Skull Conductivity Uncertainties in EEG Source Imaging
Creators: name: Rimpiläinen, Ville
name: Koulouri, Alexandra
name: Lucka, Felix
name: Kaipio, Jari P
name: Wolters, Carsten H
Publisher: name: arXiv
Year: 2017
Subjects: subject: Medical Physics (physics.med-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Knowing the correct skull conductivity is crucial for the accuracy of EEG source imaging, but unfortunately, its true value, which is inter- and intra-individually varying, is difficult to determine. In this paper, we propose a statistical method based on the Bayesian approximation error approach to compensate for source imaging errors related to erroneous skull conductivity. We demonstrate the potential of the approach by simulating EEG data of focal source activity and using the dipole scan algorithm and a sparsity promoting prior to reconstruct the underlying sources. The results suggest that the greatest improvements with the proposed method can be achieved when the focal sources are close to the skull.
description: 4 pages, 2 figures, European Medical and Biological Engineering Conference
RAHBAR MA'NAVIYATINING BOSHQARUVDA NAMOYON BO'LISHI
Creators: name: Pardayev, Shoxnur
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada rahbar maʼnaviyatining boshqaruvda namoyon boʻlishi, boshqaruv maʼnaviyati va rahbar maʼnaviy qiyofasi aloqadorligi masalasi, boshqaruv madaniyati va zamonaviy rahbar shaxs maʼnaviy qiyofasining milliy-axloqiy jihatlari haqida toʻliq bayon qilingan.
Taxis of Artificial Swimmers in a Spatio-Temporally Modulated Activation Medium
Creators: name: Geiseler, Alexander
name: Hänggi, Peter
name: Marchesoni, Fabio
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Contrary to microbial taxis, where a tactic response to external stimuli is controlled by complex chemical pathways acting like sensor-actuator loops, taxis of artificial microswimmers is a purely stochastic effect associated with a non-uniform activation of the particles' self-propulsion. We study the tactic response of such swimmers in a spatio-temporally modulated activating medium by means of both numerical and analytical techniques. In the opposite limits of very fast and very slow rotational particle dynamics, we obtain analytic approximations that closely reproduce the numerical description. A swimmer drifts on average either parallel or anti-parallel to the propagation direction of the activating pulses, depending on their speed and width. The drift in line with the pulses is solely determined by the finite persistence length of the active Brownian motion performed by the swimmer, whereas the drift in the opposite direction results from the combination of ballistic and diffusive properties of the swimmer's dynamics.
description: 19 pages, 6 figures; Entropy (in press)