cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploratory numerical experiments with a macroscopic theory of interfacial interactions
Creators: name: Giordano, Domenico
name: Solano-López, Pablo
name: Donoso, Josè Manuel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Phenomenological theories of interfacial interactions have targeted terrestrial applications since long time and their exploitation has inspired our research programme to build up a macroscopic theory of gas-surface interactions targeting the complex phenomenology of hypersonic reentry flows as alternative to standard methods based on accommodation coefficients. The objective of this paper is the description of methods employed and results achieved in an exploratory study, that is, the unsteady heat transfer between two solids in contact with and without interface. It is a simple numerical-demonstrator test case designed to facilitate quick numerical calculations and to bring forth already sufficiently meaningful aspects relevant to thermal protection due to the formation of the interface. The paper begins with a brief introduction on the subject matter and a review of relevant literature. Then the case is considered in which the interface is absent. The importance of tension continuity as boundary condition on the same footing of heat-flux continuity is recognised and the role of the former in governing the establishment of the temperature-difference distribution over the separation surface is explicitly shown. Evidence is given that the standard temperature-continuity boundary condition is just a particular case. Subsequently the case in which the interface is formed between the solids is analysed. The coupling among the heat-transfer equations applicable in the solids and the balance equation for the surface thermodynamic energy formulated in terms of the surface temperature is discussed. Results are illustrated for planar and cylindrical configuration; they show unequivocally that the thermal-protection action of the interface turns out to be driven exclusively by thermophysical properties of the solids and of the interface; accommodation coefficients are not needed.
description: 21 pages, 18 figures
Asymmetric Cell Division in the Generation of Immunity and Tolerance
Creators: Yen, Bonnie
Publisher: name: Columbia University
Year: 2018
Subjects: subject: Immunology
subject: FOS: Clinical medicine
subject: Cell division
subject: Immunological tolerance
subject: Molecular biology

description: The immune system relies on the collaboration of heterogeneous cell types to respond to infection, develop immunological memory, and to maintain immunological tolerance.  In response to infection, naïve lymphocytes must divide and give rise to differentiated effector cells while also regenerating a population of memory cells that may respond more efficiently to future infection.  It has been demonstrated in B cells and T cells that the generation of these cell types may be accomplished simultaneously through asymmetric cell division.  The second chapter of this thesis focuses on what factors may drive the divergence of cell fates in asymmetric cell division of CD8+ T cells.  We demonstrate unequal expression of transcription factor TCF1 between cytokinetic sibling cells, which may be driven by unequal transduction of nutrient-sensitive PI3K/AKT/mTOR signaling.  In chapter three, we extend our interrogation of asymmetric cell division in lymphocytes to the development of regulatory T cells, which are important for the maintenance of immunological self-tolerance.  It has been shown that there is some overlap in the T cell receptor repertoires of Tregs and conventional CD4+ T cells.  We propose that this overlap may be a result of an asymmetric cell division, giving rise to one Treg and one conventional CD4+ T cell.  We demonstrate asymmetric Foxp3 expression between cytokinetic sibling cells found in the thymus as well as from an in vitro Treg induction model.  We also show that in vitro upregulation of Foxp3, the major Treg-associated transcription factor, is inhibited by cell cycle inhibitors, further linking the act of cell fate divergence to a divisional event.
Predictability in the ETAS Model of Interacting Triggered Seismicity
Creators: name: Helmstetter, A.
name: Sornette, D.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: As part of an effort to develop a systematic methodology for earthquake forecasting, we use a simple model of seismicity based on interacting events which may trigger a cascade of earthquakes, known as the Epidemic-Type Aftershock Sequence model (ETAS). The ETAS model is constructed on a bare (unrenormalized) Omori law, the Gutenberg-Richter law and the idea that large events trigger more numerous aftershocks. For simplicity, we do not use the information on the spatial location of earthquakes and work only in the time domain. We offer an analytical approach to account for the yet unobserved triggered seismicity adapted to the problem of forecasting future seismic rates at varying horizons from the present. Tests presented on synthetic catalogs validate strongly the importance of taking into account all the cascades of still unobserved triggered events in order to predict correctly the future level of seismicity beyond a few minutes. We find a strong predictability if one accepts to predict only a small fraction of the large-magnitude targets. However, the probability gains degrade fast when one attempts to predict a larger fraction of the targets. This is because a significant fraction of events remain uncorrelated from past seismicity. This delineates the fundamental limits underlying forecasting skills, stemming from an intrinsic stochastic component in these interacting triggered seismicity models.
description: Latex file of 20 pages + 15 eps figures + 2 tables, in press in J. Geophys. Res
Quantum Integrable Systems and Elliptic Solutions of Classical Discrete Nonlinear Equations
Creators: name: Krichever, I.
name: Lipan, O.
name: Wiegmann, P.
name: Zabrodin, A.
Publisher: name: arXiv
Year: 1996
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Functional relation for commuting quantum transfer matrices of quantum integrable models is identified with classical Hirota's bilinear difference equation. This equation is equivalent to the completely discretized classical 2D Toda lattice with open boundaries. The standard objects of quantum integrable models are identified with elements of classical nonlinear integrable difference equation. In particular, elliptic solutions of Hirota's equation give complete set of eigenvalues of the quantum transfer matrices. Eigenvalues of Baxter's $Q$-operator are solutions to the auxiliary linear problems for classical Hirota's equation. The elliptic solutions relevant to Bethe ansatz are studied. The nested Bethe ansatz equations for $A_{k-1}$-type models appear as discrete time equations of motions for zeros of classical $τ$-functions and Baker-Akhiezer functions. Determinant representations of the general solution to bilinear discrete Hirota's equation and a new determinant formula for eigenvalues of the quantum transfer matrices are obtained.
description: 32 pages, LaTeX file, no figures
title: ICT/IoT application to pre-hospital management of patients with stroke in acute stage
Creators: name: Kurisu, Kaoru
Publisher: name: German Medical Science GMS Publishing House
Year: 2021
Subjects: subject: 610 Medical sciences; Medicine

description: Objective: After report of the usefulness of endovascular thrombectomy in acute stage of the stroke patients, the main issue to rescue the patients with stroke is to carry them to the suitable stroke center where the endovascular treatment staffs are available to do thrombectomy as short as possible.[for full text, please go to the a.m. URL]
description: 72. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC), Joint Meeting mit der Polnischen Gesellschaft für Neurochirurgie
Der Nersessian, Sirapie: Manuscrits arméniens illustrés des XIIe, XIIIe et XIVe siècles de la bibliothèques des Pères Mekhitaristes de Venise d'après les clichés et sous le patronage de la Frick Art Reference Library
Creators: name: Baumstark, Anton
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2025

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 36 Nr. 1 (1939): Oriens christianus, Band 36, Heft 1
Incidence algebras of simplicial complexes
Creators: name: Zapatrin, Roman R.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Combinatorics (math.CO)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 05A10; 06A07; 16D80

description: With any locally finite partially ordered set $K$ its incidence algebra $Ω(K)$ is associated. We shall consider algebras over fields with characteristic zero. In this case there is a correspondence $K \leftrightarrow Ω(K)$ such that the poset $K$ can be reconstructed from its incidence algebra up to an isomorphism -- due to Stanley theorem. In the meantime, a monotone mapping between two posets in general induces no homomorphism of their incidence algebras. In this paper I show that if the class of posets is confined to simplicial complexes then their incidence algebras acquire the structure of differential moduli and the correspondence $K\leftrightarrowΩ(K)$ is a contravariant functor.
description: LaTex2e, 14 pages
Pterobates shelkovnikovi PARAMONOW 1928
Creators: name: Dils, J.
name: Özbek, H.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bombyliidae
Pterobates
Pterobates shelkovnikovi

description: Pterobates shelkovnikovi PARAMONOW 1928
D i s t r i b u t i o n: Armenia, Azerbaijan, Gruzia, Kyrgyz Republik, Tajikistan, Turkmenistan, Uzbekistan.
 M a t e r i a l: Adiyaman: Nemrut Daĝi, 1675 m, 37°57'45” N- 38°44'42” E, 24.07.2000 (Dils J., Faes J.). New for the Turkish fauna. This record in Turkey (Adıyaman) marks the westernmost occurrence of this species.
description: Published as part of Dils, J. & Özbek, H., 2006, Contribution to the Knowledge of the Bombyliidae of Turkey (Diptera), pp. 455-504 in Linzer biologische Beiträge 38 (1) on page 488, DOI: 10.5281/zenodo.5433375
Radatox - New Space Atomic Oxygen resistant insulation
Creators: name: Mikus, Pierre-Yves
name: Biscaras, Gérard
Publisher: name: ISMSE-15/ICPMSE-13
Year: 2022
Subjects: subject: ATOX
subject: Atomic Oxygen
subject: Insulation
subject: Space Environment
subject: Cable
subject: Wire
subject: Polymer
subject: LEOX
subject: LEO
subject: Radatox
subject: ESA
subject: New Space
subject: Electrical Insulation
subject: Radiation
subject: Materials
subject: Polymer
subject: Polymers
subject: Electrical industry
subject: Electrical engineering
subject: Material
subject: Insulating material
subject: Space Flight
subject: Cable

description: ATOX erosion issue in Space

Spacecraft orbiting or passing through Low Earth Orbit (LEO) are exposed to impacts with atomic oxygen (ATOX). Materials exposed at these altitudes, such as multi-layer insulation (MLI) blankets, solar arrays, or wires and cables, are susceptible to atomic oxygen erosion by thermo-oxidation, and must be resistant to or protected from these particles — especially at altitudes below 600 km (the lower the altitude, the higher the ATOX density).

Most organic materials are not naturally resistant to atomic oxygen and must be externally shielded from the Low Earth Orbit (LEO) environment. When possible, this is usually done by either wrapping, coating, or isolating wires in an aluminum tray or conduit, or by routing wires to areas that are protected from atomic oxygen. This technical solution not only adds excess weight to the interconnect systems, but also decreases design flexibility.

Developments Results

Axon has developed a new range of solutions exhibiting both high ATOX resistance (erosion yield ≤ 2×10⁻²⁶ cm³/atom) and high radiation tolerance (≥ 200 Mrad).

This new solution has been extensively tested on the ground by independent laboratories, including ESA ESTEC’s TEC-QEE lab for Atomic Oxygen Erosion experiments (using the LEOX equipment), and another independent laboratory for a space-like accelerated ageing evaluation campaign (including ionizing radiation, UV exposure, thermal cycling, and thermo-optical property characterization).

A summary of the ATOX erosion test results, as well as the properties and performance of Radatox™-based products, is presented in the Poster tables.

Applications and Products

Radatox™-based insulated round wire and cable solutions are now available for space users. The combined qualities of ATOX resistance, flexibility, and mass savings make Radatox™ an ideal solution for solar array cabling compared to existing options. Flat Flexible Cable (FFC) prototypes with Radatox™ protection have also been developed. Other potential applications include ATOX-resistant antennas, adhesive tapes, and MLI blankets.

RADATOX-M10 – A NEW LIGHTWEIGHT ATOX-RESISTANT SOLUTION

100 times more ATOX-resistant than polyimide Kapton® 100H

10 times more ATOX-resistant than perfluoropolymers (FEP, PFA, PTFE)

Intrinsic bulk resistance to ATOX

Ionizing radiation resistance ≥ 200 Mrad

40% mass savings compared to perfluoropolymers such as FEP, PFA, or PTFE

Twice as flexible as polyimide tapes of similar thickness
Asymmetric Mitochondrial Inheritance and Retention in the Regulation of Aging in S. cerevisiae
Creators: Pernice, Wolfgang Maximilian
Publisher: name: Columbia University
Year: 2016
Subjects: Cytology
Cell division
Mitochondria
Saccharomyces cerevisiae
Aging

description: Both an intuitive observation and maybe the most mysterious process of biology, aging describes the progressive deterioration of cellular functions with time. Asymmetric cell divisions stand at the center of ability to reset age in offspring and for stem cells to self-renew. This requires the asymmetric segregation of age-determinants, many of which have been identified in the budding yeast Saccharomyces cerevisiae.
      We here use budding yeast to explore fundamental aspects underlying the asymmetric inheritance of mitochondria and the concurrent rejuvenation of daughter cells. We show that in addition to the preferential inheritance of high-functioning mitochondria to daughter cells, a distinct population of high-quality organelles must also be retained within the mother cell. We find that both physical retention and qualitative maintenance of a distinct mitochondrial population at the mother cell tip depends on Mitochondrial F-box protein (Mfb1p) and that MFB1-deletion leads to premature aging. Our findings outline a critical balance between the need for daughter cell rejuvenation and the requirement to conserve replicative potential within the mother cell.
      The particular mechanism by which Mfb1p functions further lead us to uncover a critical role of globally maintained cellular polarity in form of an axial budding pattern in lifespan regulation, the functional significance of which thus far remained essentially unexplored. We also find that the asymmetric localization of Mfb1p depends on potentially novel structures of the actin cytoskeleton and the loss of Mfb1p-polarization with age may accurately predict remaining cellular lifespan.
Additional file 3 of Identification of a cytosine methyltransferase that improves transformation efficiency in Methylomonas sp. DH-1
Creators: name: Ren, Jun
name: Lee, Hyang-Mi
name: Thai, Thi Duc
name: Na, Dokyun
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 3: Fig. S1. Transformation efficiency of the plasmid DNA in which methylation sites were changed to non-methylation sites. Fig. S2. The effects of plasmid length and methylation on transformation efficiency. Fig. S3. The growth curves of Methylomonas sp. DH-1 cells.
Hydrodynamic excitations of trapped dipolar fermions
Creators: name: Goral, K.
name: Brewczyk, M.
name: Rzazewski, K.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: A single-component Fermi gas of polarized dipolar particles in a harmonic trap can undergo a mechanical collapse due to the attractive part of the dipole-dipole interaction. This phenomenon can be conveniently manipulated by the shape of the external trapping potential. We investigate the signatures of the instability by studying the spectrum of low-lying collective excitations of the system in the hydrodynamic regime. To this end, we employ a time-dependent variational method as well as exact numerical solutions of the hydrodynamic equations of the system.
description: 4 pages, 2 eps figures, final version
Asymmetric metabolism by sibling lymphocytes coupling differentiation and self-renewal
Creators: Chen, Yen-Hua
Publisher: name: Columbia University
Year: 2017
Subjects: subject: Cell differentiation
subject: Cell division
subject: Mitochondria
subject: Lymphocytes
subject: Immunology
subject: FOS: Clinical medicine
subject: Cytology
subject: Biology

description: After naïve lymphocytes are activated by foreign antigens, they yield cellular progeny with diverse functions, including memory cells, effector cells, and precursors of germinal center B cells. However, it remains unclear whether a naïve lymphocyte is capable of generating daughter cells with multiple fates or multiple naive cells are activated and each give rise to daughter cells with different cell fates. This dissertation analyzes the role of asymmetric cell division in the generation of effector lymphocytes and maintenance of progenitor cells. Our data provide evidence that daughter cells exhibit differential mitochondrial stasis and inherit different amounts of glucose transporters, which is coupled to distinct metabolic and transcriptional program in the sibling cells.
              To uncover the links between mitochondrial stasis, transcription network reprogramming and cell fate, we perturbed mitochondrial clearance with pharmacological and genetic approaches. I found that the treatments, which impaired mitochondrial function, increased the differentiation of B cells and T cells into effector subsets. Thus, we hypothesize that mitochondrial stasis could be a trigger for effector cell differentiation. To further explore the mechanism for aged mitochondria-induced shifts in transcriptional and metabolic programs, we used reactive oxygen species (ROS) scavengers and glycolysis inhibitors to demonstrate that mitochondria function and the expressions of lineage-specific transcription factors crosstalk through ROS-mediated signaling and activating AMPK. ROS scavenger treatments helped to maintain the progenitor population and suppressed the differentiation of effector subsets, whereas effector cell differentiation was boosted in the AMPK-α1 knockout. These results suggest mitochondrial stress-induced ROS is required for repressing Pax5 and increasing IRF4.
             In addition to showing mitochondrial stasis’ connection to cell fate, this dissertation also demonstrates the linkage between phosphatidylinositol-3-kinases and glucose transporter 1 (Glut1) in establishing polarity in dividing cells and in transcriptional reprogramming.
              In sum, this dissertation suggests that asymmetric mitochondrial stasis and nutrient up-take could be part of the driving force of cell fate owing to self-reinforcement and reciprocal inhibition between anabolism and catabolism. These results shed light on the deterministic mechanism of effector cell differentiation and provide clues to the basis of maintenance of self-renewal by activated lymphocytes. These findings could be beneficial for producing memory cells and preventing effector cell exhaustion phenotype in a chronic infection or in cancer microenvironment.
Analytic solutions for the spatial character and coherence properties of light scattered from two dipole-coupled atoms
Creators: name: Fersterer, Petra
name: Ballagh, R. J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Analytic solutions for steady-state expectation values of atomic quantities and second order correlations are obtained for a fully quantum treatment of two stationary dipole-coupled atoms driven in a standard geometric configuration by a near resonant laser. Explicit expressions for the spatial and coherence properties of the far-field scattered light intensity are derived, valid for the full range of system parameters. A comprehensive survey of the steady-state scattering behaviour is given, with key features precisely characterised, including subradiant scattering, and the regime in which the dipole-dipole coupling has significant effect. A regime is also found where the incoherent scattered light develops spatial interference fringes. We examine in detail a decorrelation approximation that has potential application for larger systems of atoms that are intractable in a full quantum treatment. Finally, we introduce the concept of an effective driving field and show that it can provide a direct and intuitive physical interpretation of key aspects of the system behaviour, including subradiant scattering.
The Early Reign of Mithradates II the Great in Parthia
Creators: name: Olbrycht, Marek
Publisher: name: figshare
Year: 2019
Subjects: subject: History
subject: 210302 Asian History
subject: FOS: History and archaeology
subject: 210306 Classical Greek and Roman History
subject: 210310 Middle Eastern and African History
subject: 219999 History and Archaeology not elsewhere classified

description: The Early Reign of Mithradates II the Great in Parthia, Anabasis. Studia Classica et Orientalia 1, 2010, 144-158.
ABSTRACTMithradates II (122–88/87 B.C.) is among the greatest Parthian kings, and because of his attainments, some ancient accounts call him “the Great.” Mithradates II rose to the throne after the unexpected death of his father Artabanos I. In his early reign, Mithradates II routed a host of the “Guti,” i.e., Tochari, in Baktria, and managed to halt Arab raids in Babylonia. Faced with strong resistance from the Parthians under Artabanos I and Mithradates II, the Sakai wended their way south along the Areios (Harirud) and Margos (Morghab) into Drangiana and the Ariaspian land. Mithradates II pacified and included them in the Arsakid empire. Mithradates’ monetary production in ca. 122–111/110 concentrated in northern Iranian centers: in Ekbatana, Rhaga, and to a lesser extent in Nisa and Merv. Rich Media, and also native Parthia as well as Margiana, became bases of operations for Mithradates II’s great offensives in Central Asia.
Roberts, C. H.: Catalogue of the greek and latin Papyri in the John Rylands Library Manchester
Creators: name: Baumstark, Anton
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2025

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 36 Nr. 1 (1939): Oriens christianus, Band 36, Heft 1
Geometry of Bäcklund Transformations II: Monge-Ampère Invariants
Creators: name: Hu, Yuhao
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 37K35, 35L10, 58A15, 53C10

description: This article is concerned with the question: For which pairs of hyperbolic Euler-Lagrange systems in the plane does there exist a rank-$1$ Bäcklund transformation relating them? We express some obstructions to such existence in terms of the local invariants of the Euler-Lagrange systems. In addition, we discover a class of Bäcklund transformations relating two hyperbolic Euler-Lagrange systems of distinct types.
description: Appendix C added; 45 pages
Plesiocera algira MACQUART 1840
Creators: name: Dils, J.
name: Özbek, H.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bombyliidae
Plesiocera
Plesiocera algira

description: Plesiocera algira MACQUART 1840
D i s t r i b u t i o n: Algeria, Israel, Italy, Lebanon, Spain, Syria, Tunesia.
 M a t e r i a l: Adana, Küçükgezbeli, 1440m, N- 38°09’16.6” E- 43°22’38.8, 12.07.2004 (J. Dils-J. Faes). New for the Turkish fauna.
description: Published as part of Dils, J. & Özbek, H., 2006, Contribution to the Knowledge of the Bombyliidae of Turkey (Diptera), pp. 455-504 in Linzer biologische Beiträge 38 (1) on page 488, DOI: 10.5281/zenodo.5433375
Alexander Invariants of Complex Hyperplane Arrangements
Creators: name: Cohen, Daniel C.
name: Suciu, Alexander I.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H30, 52B30, 57M05 (Primary), 20F14, 20F36 (Secondary)

description: Let A be an arrangement of complex hyperplanes. The fundamental group of the complement of A is determined by a braid monodromy homomorphism from a finitely generated free group to the pure braid group. Using the Gassner representation of the pure braid group, we find an explicit presentation for the Alexander invariant of A. From this presentation, we obtain combinatorial lower bounds for the ranks of the Chen groups of A. We also provide a combinatorial criterion for when these lower bounds are attained.
description: 26 pages; LaTeX2e with amscd, amssymb packages
Thyridanthrax obliteratus LOEW 1862
Creators: name: Dils, J.
name: Özbek, H.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bombyliidae
Thyridanthrax
Thyridanthrax obliteratus

description: Thyridanthrax obliteratus LOEW 1862
D i s t r i b u t i o n: Armenia, Azerbaijan, Egypt, Greece, Gruzia, Iran, Italy, Kyrgyz Republic, Libya, Mongolia, Tajikistan, Turkmenistan, Uzbekistan, former Yugoslavia.
 M a t e r i a l: Antalya: Yaylaalan, 37°0'42" N- 31°34'42" E, 07.09.1999 (Dils J.). New for the Turkish fauna.
description: Published as part of Dils, J. & Özbek, H., 2006, Contribution to the Knowledge of the Bombyliidae of Turkey (Diptera), pp. 455-504 in Linzer biologische Beiträge 38 (1) on page 489, DOI: 10.5281/zenodo.5433375
Reinventing the Zel'Dovich Wheel
Creators: name: Gooding, Cisco
name: Weinfurtner, Silke
name: Unruh, William G.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: After reviewing the pioneering work by Zel'Dovich in which radiation is amplified perpendicular to the axis of a rotating conductor, we consider an alternative scattering arrangement. We demonstrate superradiant amplification of electromagnetic waves with orbital angular momentum, directed axially towards a rotating conductor. Taking into account recent advances in optics and condensed matter systems, our approach presents new possibilities for rotational superradiance experiments. We discuss remaining challenges that must be faced before a laboratory observation of the Zel'Dovich effect can be considered feasible.
Heterogeneous Nuclear Ribonucleoprotein L is required for the survival and functional integrity of murine hematopoietic stem cells
Creators: name: Gaudreau, Marie-Claude
name: Grapton, Damien
name: Helness, Anne
name: Vadnais, Charles
name: Fraszczak, Jennifer
name: Shooshtarizadeh, Peiman
name: Wilhelm, Brian
name: Robert, Francois
name: Heyd, Florian
name: Moroy, Tarik
Publisher: name: Freie Universität Berlin
Year: 2016
Subjects: subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie

description: The proliferation and survival of hematopoietic stem cells (HSCs) has to be strictly coordinated to ensure the timely production of all blood cells. Here we report that the splice factor and RNA binding protein hnRNP L (heterogeneous nuclear ribonucleoprotein L) is required for hematopoiesis, since its genetic ablation in mice reduces almost all blood cell lineages and causes premature death of the animals. In agreement with this, we observed that hnRNP L deficient HSCs lack both the ability to self-renew and foster hematopoietic differentiation in transplanted hosts. They also display mitochondrial dysfunction, elevated levels of γH2AX, are Annexin V positive and incorporate propidium iodide indicating that they undergo cell death. Lin-c-Kit+ fetal liver cells from hnRNP L deficient mice show high p53 protein levels and up-regulation of p53 target genes. In addition, cells lacking hnRNP L up-regulated the expression of the death receptors TrailR2 and CD95/Fas and show Caspase-3, Caspase-8 and Parp cleavage. Treatment with the pan-caspase inhibitor Z-VAD-fmk, but not the deletion of p53, restored cell survival in hnRNP L deficient cells. Our data suggest that hnRNP L is critical for the survival and functional integrity of HSCs by restricting the activation of caspase-dependent death receptor pathways.
Asymptotic representations of shifted quantum affine algebras from critical K-theory
Creators: Liu, Huaxin
Publisher: name: Columbia University
Year: 2021
Subjects: subject: Mathematics
subject: FOS: Mathematics
subject: Affine algebraic groups
subject: Quantum groups
subject: Toroidal harmonics

description: In this thesis we explore the geometric representation theory of shifted quantum affine algebras 𝒜^𝜇, using the critical K-theory of certain moduli spaces of infinite flags of quiver representations resembling the moduli of quasimaps to Nakajima quiver varieties. These critical K-theories become 𝒜^𝜇-modules via the so-called critical R-matrix 𝑅, which generalizes the geometric R-matrix of Maulik, Okounkov, and Smirnov. In the asymptotic limit corresponding to taking infinite instead of finite flags, singularities appear in 𝑅 and are responsible for the shift in 𝒜^𝜇. The result is a geometric construction of interesting infinite-dimensional modules in the category 𝒪 of 𝒜^𝜇, including e.g. the pre-fundamental modules previously introduced and studied algebraically by Hernandez and Jimbo. Following Nekrasov, we provide a very natural geometric definition of qq-characters for our asymptotic modules compatible with the pre-existing definition of q-characters. When 𝒜^𝜇 is the shifted quantum toroidal gl₁ algebra, we construct asymptotic modules DT_𝜇 and PT_𝜇 whose combinatorics match those of (1-legged) vertices in Donaldson--Thomas and Pandharipande--Thomas theories. Such vertices control enumerative invariants of curves in toric 3-folds, and finding relations between (equivariant, K-theoretic) DT and PT vertices with descendent insertions is a typical example of a wall-crossing problem. We prove a certain duality between our DT_𝜇 and PT_𝜇 modules which, upon taking q-/qq-characters, provides one such wall-crossing relation.
Semi-algebraic properties of Minkowski sums of a twisted cubic segment
Creators: name: Bik, Arthur
name: Czapliński, Adam
name: Wageringel, Markus
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14P10

description: We find a semi-algebraic description of the Minkowski sum $\mathcal{A}_{3,n}$ of $n$ copies of the bounded twisted cubic $\{(t,t^2,t^3)\mid -1\leq t\leq 1\}$ for each integer $n\geq3$. These descriptions provide efficient membership tests for the sets $\mathcal{A}_{3,n}$. These membership tests in turn can be used to resolve some instances of the underdetermined matrix moment problem, which was formulated by Michael Rubinstein and Peter Sarnak in order to study problems related to $L$-functions and their zeros.
description: 19 pages, 3 figures, major revision
The Cappelli-Itzykson-Zuber A-D-E classification
Creators: name: Gannon, T.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 81R10 (primary) 17B67, 81T40 (secondary)

description: In 1986 Cappelli, Itzykson and Zuber classified all modular invariant partition functions for the conformal field theories associated to the affine $A_1$ algebra; they found they fall into an A-D-E pattern. Their proof was difficult and attempts to generalise it to the other affine algebras failed -- in hindsight the reason is that their argument ignored most of the rich mathematical structure present. We give here the "modern" proof of their result; it is an order of magnitude simpler and shorter, and much of it has already been extended to all other affine algebras. We conclude with some remarks on the A-D-E pattern appearing in this and other RCFT classifications.
description: 10 pages, plain tex; an historical remark on A-D-E corrected, 2 references added, several new comments added to conclusion
TUTORING AS A NEW BRANCH OF TEACHING IN UZBEKISTAN EDUCATION SYSTEM
Creators: name: Muxammadjonova Madinabonu Isroiljon qizi, FarDU Pedagogika nazariyasi va tarixi mutaxassisligi 1-kurs magistranti
Publisher: name: Zenodo
Year: 2024

description: This article describes the introduction of “tutoring” into the educational system of Uzbekistan, the development of this process, and various opinions and concepts in the field of tutoring by tutoring scholars. Through this, tutors and future personnels in this field can acquire the most necessary knowledge about tutoring for themselves.
title: Actual process
title: a research program
titleType: Subtitle
Creators: name: Prechelt, Lutz
name: Jekutsch, Sebastian
name: Johnson, Philip
Publisher: name: Freie Universität Berlin
Year: 2006
Subjects: subject: 000 Informatik, Informationswissenschaft, allgemeine Werke::000 Informatik, Wissen, Systeme::005 Computerprogrammierung, Programme, Daten

description: Most process research relies heavily on the use of terms and concepts whose validity depends on a variety of assumptions to be met. As it is difficult to guarantee that they are met, such work continually runs the risk of being invalid. We propose a different and complementary approach to understanding process: Perform all description bottom-up and based on hard data alone. We call the approach actual process and the data actual events. Actual events can be measured automatically. This paper describes what has been done in this area already and what are the core problems to be solved in the future.
On the Origin of Dust in Galaxy Clusters at Low to Intermediate Redshift
Creators: name: Gjergo, Eda
name: Matteucci, Francesca
name: Palla, Marco
name: Biviano, Andrea
name: Lacchin, Elena
name: Fan, XiLong
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Stacked analyses of galaxy clusters at low-to-intermediate redshift show signatures attributable to dust, but the origin of this dust is uncertain. We test the hypothesis that the bulk of cluster dust derives from galaxy ejecta. To do so, we employ dust abundances obtained from detailed chemical evolution models of galaxies. We integrate the dust abundances over cluster luminosity functions (one-slope and two-slope Schechter functions). We consider both a hierarchical scenario of galaxy formation and an independent evolution of the three main galactic morphologies: elliptical/S0, spiral and irregular. We separate the dust residing within galaxies from the dust ejected in the intracluster medium. To the latter, we apply thermal sputtering. The model results are compared to low-to-intermediate redshift observations of dust masses. We find that in any of the considered scenarios, elliptical/S0 galaxies contribute negligibly to the present-time intracluster dust, despite producing the majority of gas-phase metals in galaxy clusters. Spiral galaxies, instead, provide both the bulk of the spatially-unresolved dust and of the dust ejected into the intracluster medium. The total dust-to-gas mass ratio in galaxy clusters amounts to $10^{-4}$, while the intracluster medium dust-to-gas mass ratio amounts to $10^{-6}$ at most. These dust abundances are consistent with the estimates of cluster observations at $0.2 < z <1$. We propose that galactic sources, spiral galaxies in particular, are the major contributors to the cluster dust budget.
description: MNRAS. Accepted on Feb 11th, 2020. 13 pages, 4 figures
title: Desigualdades estructurales en el aprovechamiento de un recurso estratégico
title: La economía global del litio y el caso de Bolivia
titleType: Subtitle
Creators: name: Ströbele-Gregor, Juliana
Publisher: name: Freie Universität Berlin
Year: 2015
Subjects: programa estatal de litio en Bolivia
configuración de desigualdades interdependiente
cadenas de valor del litio
desarrollo tecnológico

description: Frente a la necesidad de reducir drásticamente la emisión de CO2 debido al cambio climático, está intensificándose el uso de las energías alternativas, así como de autos eléctricos y nuevos sistemas de almacenamiento de energía con baterías de ion de litio de alto rendimiento. El litio se emplea además en otros segmentos de las tecnologías de la comunicación y de las tecnologías del futuro. De esta manera también está creciendo la demanda de la materia prima litio a nivel global. Bolivia dispone de las mayores reservas de litio en salares. Con su programa nacional de litio apunta a la producción de baterías para el mercado internacional. El presente estudio analiza la configuración global del negocio del litio. Esto incluye la producción, las cadenas de valor y el mercado del litio, controlado por empresas mixtas globales; examina también, tomando como ejemplo Alemania, el desarrollo de altas tecnologías y de estrategias para reducir la dependencia de la importación de litio. El análisis pone de manifiesto la configuración de desigualdad global interdependiente, históricamente conformada, en la que se inserta el programa de litio boliviano, y se pregunta por la competitividad de Bolivia en el mercado internacional de litio.
Kinetics of the shear banding instability in startup flows
Creators: name: Fielding, Suzanne M.
name: Olmsted, Peter D.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Motivated by experiments on wormlike micelles, we study the early stages of the shear banding instability using a two-fluid Johnson-Segalman model. We perform a linear stability analysis for coupled fluctuations in shear rate, micellar strain and concentration about an initially homogeneous state. First we calculate the ``spinodal'' onset of instability in sweeps along the intrinsic constitutive curve. For startup ``quenches'' into the unstable region, the instability usually occurs before the intrinsic constitutive curve can be attained so we analyse the fluctuations with respect to the homogeneous startup flow to find the selected length and time scales at which inhomogeneity first emerges. In the uncoupled limit, fluctuations in shear rate and micellar strain are independent of those in concentration, and are unstable when the intrinsic constitutive curve has negative slope; but no length scale is selected. When coupled to concentration, this instability is enhanced at short length scales; a length scale is selected, as seen experimentally. The unstable region is then broadened. Far from an underlying (zero-shear) demixing instability, the broadening is slight and the instability is still dominated by shear rate and micellar strain. Close to demixing, instability sets in at very low shear rate, where it is demixing triggered by flow.
description: 20 pages, 12 figures
Additional file 5 of Genome-wide characterization, expression analyses, and functional prediction of the NPF family in Brassica napus
Creators: name: Wen, Jing
name: Li, Peng-Feng
name: Ran, Feng
name: Guo, Peng-Cheng
name: Zhu, Jia-Tian
name: Yang, Jin
name: Zhang, Lan-Lan
name: Chen, Ping
name: Li, Jia-Na
name: Du, Hai
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 5: Figure S3. The EXXEK(R) domain of NPF proteins in Brassica napus and Arabidopsis. (PDF 4401 kb)
Veribubo misellus LOEW 1869
Creators: name: Dils, J.
name: Özbek, H.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bombyliidae
Veribubo
Veribubo misellus

description: Veribubo misellus LOEW 1869
D i s t r i b u t i o n: Armenia, Azerbaijan, Egypt, Greece, Gruzia, Iran, Italy, Kyrgyz Republic, Libya, Tajikistan, Turkmenistan, Uzbekistan, former Yugoslavia.
 M a t e r i a l: Malatya: 3 km NW Darende, 02.08.1997 (De Prins, Olivier, VDP.). New for the Turkish fauna.
description: Published as part of Dils, J. & Özbek, H., 2006, Contribution to the Knowledge of the Bombyliidae of Turkey (Diptera), pp. 455-504 in Linzer biologische Beiträge 38 (1) on page 490, DOI: 10.5281/zenodo.5433375
Asymptotic Analysis of Service Systems with Congestion-Sensitive Customers
Creators: Yao, John Jia-Hao
Publisher: name: Columbia University
Year: 2016
Subjects: Operations research
Queuing theory
Dynamics
Consumer satisfaction

description: Many systems in services, manufacturing, and technology, feature users or customers sharing a limited number of resources, and which suffer some form of congestion when the number of users exceeds the number of resources. In such settings, queueing models are a common tool for describing the dynamics of the system and quantifying the congestion that results from the aggregated effects of individuals joining and leaving the system. Additionally, the customers themselves may be sensitive to congestion and react to the performance of the system, creating feedback and interaction between individual customer behavior and aggregate system dynamics.This dissertation focuses on the modeling and performance of service systems with congestion-sensitive customers using large-scale asymptotic analyses of queueing models. This work extends the theoretical literature on congestion-sensitive customers in queues in the settings of service differentiation and observational learning and abandonment. Chapter 2 considers the problem of a service provider facing a heterogeneous market of customers who differ based on their value for service and delay sensitivity. The service provider seeks to find the revenue maximizing level of service differentiation (offering different price-delay combinations). We show that the optimal policy places the system in heavy traffic, but at substantially different levels of congestion depending on the degree of service differentiation. Moreover, in a differentiated offering, the level of congestion will vary substantially between service classes. Chapter 3 presents a new model of customer abandonment in which congestion-sensitive customers observe the queue length, but do not know the service rate. Instead, they join the queue and observe their progress in order to estimate their wait times and make abandonment decisions. We show that an overloaded queue with observational learning and abandonment stabilizes at a queue length whose scale depends on the tail of the service time distribution. Methodologically, our asymptotic approach leverages stochastic limit theory to provide simple and intuitive results for optimizing or characterizing system performance. In particular, we use the analysis of deterministic fluid-type queues to provide a first-order characterization of the stochastic system dynamics, which is demonstrated by the convergence of the stochastic system to the fluid model. This also allows us to crisply illustrate and quantify the relative contributions of system or customer characteristics to overall system performance.
TA'LIMDA TYUTORLIK FAOLIYATING O'RNI VA AHAMIYATLI JIHATLARI
Creators: name: Muxammadjonova Madinabonu Isroiljon qizi, FarDU Pedagogika nazariyasi va tarixi mutaxassisligi 1-kurs magistranti
name: O'rinova Nilufar Muhammadovna, FarDU professori, pedagogika fanlari nomzodi, dotsent
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada tyutorlik tushunchasining mazmun mohiyati, ta’lim tizimiga kirib kelishi, ta’lim jarayonida uning tutgan o’rni va ahamiyati yoritilgan. Bundan tashqari tyutorlik faoliyatining asosiy maqsadlari va o’quvchilar bilan ishlash prinsplari borasida foydali ma’lumotlar keltirilgan.
Asymptotic Theory and Applications of Random Functions
Creators: Li, Xiaoou
Publisher: name: Columbia University
Year: 2016
Subjects: subject: Monte Carlo method
subject: Differential equations, Partial
subject: Differential equations, Partial--Asymptotic theory
subject: Mathematical statistics
subject: Statistics
subject: FOS: Mathematics

description: Random functions is the central component in many statistical and probabilistic problems. This dissertation presents theoretical analysis and computation for random functions and its applications in statistics. This dissertation consists of two parts. The first part is on the topic of classic continuous random fields. We present asymptotic analysis and computation for three non-linear functionals of random fields. In Chapter 1, we propose an efficient Monte Carlo algorithm for computing P{sup_T f(t)>b} when b is large, and f is a Gaussian random field living on a compact subset T. For each pre-specified relative error ɛ, the proposed algorithm runs in a constant time for an arbitrarily large $b$ and computes the probability with the relative error ɛ. In Chapter 2, we present the asymptotic analysis for the tail probability of ∫_T e^{σf(t)+μ(t)}dt under the asymptotic regime that σ tends to zero. In Chapter 3, we consider partial differential equations (PDE) with random coefficients, and we develop an unbiased Monte Carlo estimator with finite variance for computing expectations of the solution to random PDEs. Moreover, the expected computational cost of generating one such estimator is finite. In this analysis, we employ a quadratic approximation to solve random PDEs and perform precise error analysis of this numerical solver. The second part of this dissertation focuses on topics in statistics. The random functions of interest are likelihood functions, whose maximum plays a key role in statistical inference. We present asymptotic analysis for likelihood based hypothesis tests and sequential analysis. In Chapter 4, we derive an analytical form for the exponential decay rate of error probabilities of the generalized likelihood ratio test for testing two general families of hypotheses. In Chapter 5, we study asymptotic properties of the generalized sequential probability ratio test, the stopping rule of which is the first boundary crossing time of the generalized likelihood ratio statistic. We show that this sequential test is asymptotically optimal in the sense that it achieves asymptotically the shortest expected sample size as the maximal type I and type II error probabilities tend to zero. These results have important theoretical implications in hypothesis testing, model selection, and other areas where maximum likelihood is employed.