cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Universal Distributions for Growth Processes in 1+1 Dimensions and Random Matrices
Creators: name: Praehofer, Michael
name: Spohn, Herbert
Publisher: name: arXiv
Year: 1999
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We develop a scaling theory for KPZ growth in one dimension by a detailed study of the polynuclear growth (PNG) model. In particular, we identify three universal distributions for shape fluctuations and their dependence on the macroscopic shape. These distribution functions are computed using the partition function of Gaussian random matrices in a cosine potential.
description: 4 pages, 3 figures, 1 table, RevTeX, revised version, accepted for publication in PRL
Stochastic Differential Equations and Strict Local Martingales
Creators: Qiu, Lisha
Publisher: name: Columbia University
Year: 2018
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: Mathematics
subject: Stochastic differential equations
subject: Martingales (Mathematics)
subject: Convergence

description: In this thesis, we address two problems arising from the application of stochastic differential equations (SDEs). The first one pertains to the detection of asset bubbles, where the price process solves an SDE. We combine the strict local martingale model together with a statistical tool to instantaneously check the existence and severity of asset bubbles through the asset’s historical price process. Our approach assumes that the price process of interest is a CEV process. We relate the exponent parameter in the CEV process to an asset bubble by studying the future expectation and the running maximum of the CEV process. The detection of asset bubbles then boils down to the estimation of the exponent. With a dynamic linear regression model, inference on the exponent can be carried out using historical price data. Estimation of the volatility and calibration of the parameters in the dynamic linear regression model are also studied. When using SDEs in practice, for example, in the detection of asset bubbles, one often would like to simulate its paths using the Euler scheme to study the behavior of the solution. The second part of this thesis focuses on the convergence property of the Euler scheme under the assumption that the coefficients of the SDE are locally Lipschitz and that the solution has no finite explosion. We prove that if a numerical scheme converges uniformly on any compact time set (UCP) in probability with a certain rate under the globally Lipschitz condition, then when the globally Lipschitz condition is replaced with a locally Lipschitz one plus a no finite explosion condition, UCP convergence with the same rate holds. One contribution of this thesis is the proof of √n-weak convergence of the asymptotic normalized error process. The limit error process is also provided. We further study the boundedness for the second moment of the weak limit process and its running maximum under both the globally Lipschitz and the locally Lipschitz conditions. The convergence of the Euler scheme in the sense of approximating expectations of functionals is also studied under the locally Lipschitz condition
Thickened tailings characterization program for a tailings storage facility design update : case study
Creators: name: Doucet, K.
name: Pepin, N.
name: Kissiova, Mayana
Publisher: name: The University of British Columbia
Year: 2017

description: This paper presents the results of a thickened tailings (TT) geotechnical and hydrogeological characterization program conducted in the fall of 2013 at the Canadian Malartic Mine (CMM). CMM is a gold mine located in the Abitibi region in the province of Quebec and has been operating since May 2011. The characterization program included both field and laboratory tests. The field program consisted of cone penetration tests and a drilling program conducted in the tailings storage facility (TSF). The data were interpreted to determine select in situ tailings geotechnical properties, assess their liquefaction susceptibility, determine the hydraulic conductivity of the tailings stack and locate the water table in the TSF. Tailings samples collected at several locations were tested in laboratory. Index tests were performed as well as cyclic simple shear and large strain consolidation tests. TT samples were also taken in the field along the deposition path to evaluate whether there is active segregation of the particles during the deposition at their current solids content. The results will be compared to the initial parameters and will provide updated geotechnical and hydrogeological properties of the TT being deposited at CMM as part of the update of the TSF design features.
Relation between the weak itinerant magnetism in $A_2$Ni$_7$ compounds ($A$ = Y, La) and their stacked crystal structures
Creators: name: Crivello, Jean-Claude
name: Paul-Boncour, Valérie
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The weak itinerant magnetic properties of $A_2$Ni$_7$ compounds with $A$ = {Y, La} have been investigated using electronic band structure calculations in the relation with their polymorphic crystal structures. These compounds crystallizes in two structures resulting from the stacking of two and three blocks of [$A_2$Ni$_4$ + 2 $A$Ni$_5$] units for hexagonal $2H$-La$_2$Ni$_7$ (Ce$_2$Ni$_7$ type) and rhombohedral $3R$-Y$_2$Ni$_7$ (Gd$_2$Co$_7$ type) respectively. Experimentally, $2H$-La$_2$Ni$_7$ is a weak itinerant antiferromagnet whereas $3R$-Y$_2$Ni$_7$ is a weak itinerant ferromagnet. From the present first principles calculation within non-spin polarized state, both compounds present an electronic density of state with a sharp and narrow peak centered at the Fermi level corresponding to flat bands from $3d$-Ni. This induces a magnetic instability and both compounds are more stable in a ferromagnetic (FM) order compared to a paramagnetic state ($ΔE \simeq$ -35 meV/f.u.). The magnetic moment of each of the five Ni sites varies with their positions relative to the [$A_2$Ni$_4$] and [$A$Ni$_5$] units: they are minimum in the [$A_2$Ni$_4$] unit and maximum at the interface between two [$A$Ni$_5$] units. For $2H$-La$_2$Ni$_7$, an antiferromagnetic (AFM) structure has been proposed and found with an energy comparable to that of the FM state. This AFM structure is described by two FM unit blocks of opposite Ni spin sign separated by a non-magnetic layer at z = 0 and $\frac12$. The Ni ($2a$) atoms belonging to this intermediate layer are located in the [La$_2$Ni$_4$] unit and are at a center of symmetry of the hexagonal cell ($P6_3/mmc$) where the resultant molecular field is cancelled. Further non-collinear spin calculations have been performed to determine the Ni moment orientations which are found preferentially parallel to the $c$ axis for both FM and AFM structures.
description: 19 pages, 7 figures, 2 tables
title: Mechanismen der Wärmeübertragung beim Kühlen von Metallen mit verdampfenden Flüssigkeiten
Creators: name: Jeschar, Rudolf
name: Specht, Eckehard
name: Heidt, Viktor
Publisher: name: Goltze
Year: 1990
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: 62

description: Kühlprozesse mit verdampfenden Flüssigkeiten sind in allen Bereichen der metallerzeugenden und -verarbeitenden Industrie zu finden und erfahren eine ständig zunehmende Bedeutung. Beispiele sind das Stranggießen von Stählen, Aluminium, Kupfer und anderen Metallen, das Tauchhärten von Stahl, Gußeisen und Leichtmetallegierungen sowie das Oberflächenhärten von Stählen nach einer induktiven Erwärmung einer dünnen Randschicht. Als Kühlflüssigkeiten dienen Wasser, Öle sowie Polymerlösungen. Diese liegen als Bäder vor, in die die Werkstücke eingetaucht werden, oder sie werden mittels Düsen als Filme oder als zerstäubte Flüssigkeitsstrahlen auf die Werkstückoberflächen gespritzt. Im wesentlichen kommt es bei diesen Kühlprozessen darauf an, ganz bestimmte Zeit-Temperaturkurven, z.B. an der Oberfläche, zu ermöglichen, weil hiervon die Qualität der erzeugten Werkstoffe maßgebend mitbestimmt wird. Die Abkühlvorgänge mit Wärmeabfuhr durch Strahlung und Konvektion sind im wesentlichen bekannt. Bei Kühlprozessen, bei denen mit verdampfenden Flüssigkeiten Wärme von einer heißen Oberfläche abgeführt wird, sind hingegen die physikalischen Vorgänge noch nicht hinreichend geklärt. In der Praxis erfolgt deshalb die Auslegung und Optimierung solcher Prozesse noch weitgehend empirisch. Mit diesem Beitrag wird gezeigt, welche Einflußgrößen hierbei von Bedeutung sind, und in welcher Weise diese gezielt für einen definierten Kühlprozeß genutzt werden können.
Simplifying the spectral analysis of the volume operator
Creators: name: Loll, R.
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The volume operator plays a central role in both the kinematics and dynamics of canonical approaches to quantum gravity which are based on algebras of generalized Wilson loops. We introduce a method for simplifying its spectral analysis, for quantum states that can be realized on a cubic three-dimensional lattice. This involves a decomposition of Hilbert space into sectors transforming according to the irreducible representations of a subgroup of the cubic group. As an application, we determine the complete spectrum for a class of states with six-valent intersections.
description: 19 pages, TeX, to be published in Nucl. Phys. B
Solanum campylacanthum A. Rich.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Solanales
Solanaceae
Solanum
Solanum campylacanthum

description: Solanum campylacanthum Hochst. ex A.Rich.  —
Habit: Woody herb or shrub.
Habitat: LMDF; up to 2 700 m. Distribution: II.
 Voucher: Near Sirimon Track Gate, Alt. 2 643 m, 8 Jan. 2014, SAJIT 001607 (HIB).
References: Bussmann (1993, 1994).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 80, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
title: Zur analytischen Behandlung räumlicher Gelenkketten
Creators: name: Müller, Hans
Publisher: name: Goltze
Year: 1991
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: 510

description: Mit einfachen algebraischen Hilfsmitteln werden Gelenkketten im 3-dimensionalen euklidischen Raum und damit zusammenhängende Fragestellungen behandelt. Für den sogenannten allgemeinen Fall einer räumlichen Gelenkkette wird ein algorythmisches Verfahren entwickelt, das nicht nur zur geometrisch-kinematischen Analyse, sondern auch zum Aufbau und zur Konstruktion von Gelenkwerken mit gewünschten Eigenschaften benützt werden kann. Für n-gliedrige geschlossene Ketten werden Geschlossenheitsbedingungen formuliert und insbesondere auf Gelenkvierecke eingegangen und deren Starrheit, Beweglichkeit bzw. infinitesimale Beweglichkeit (Wackeligkeit) untersucht. Bei Annahme von Symmetrieeigenschaften der Gelenkvierecke werden Klassen von ausgezeichneten Beispielen geschaffen, unter die sich nicht nur der Bennettsche Mechanismus, sondern auch ein Gegenstück, sowie viele bekannte Vierecke einreihen, deren Abmessungen in Zahlen angegeben wurden.
Stochastic Networks: Modeling, Simulation Design and Risk Control
Creators: Li, Juan
Publisher: name: Columbia University
Year: 2015
Subjects: Operations research
Engineering
Finance

description: This dissertation studies stochastic network problems that arise in various areas with important industrial applications. Due to uncertainty of both external and internal variables, these networks are exposed to the risk of failure with certain probability, which, in many cases, is very small. It is thus desirable to develop efficient simulation algorithms to study the stability of these networks and provide guidance for risk control.
      Chapter 2 models equilibrium allocations in a distribution network as the solution of a linear program (LP) which minimizes the cost of unserved demands across nodes in the network. Assuming that the demands are random (following a jointly Gaussian law), we study the probability that the optimal cost exceeds a large threshold, which is a rare event. Our contribution is the development of importance sampling and conditional Monte Carlo algorithms for estimating this probability. We establish the asymptotic efficiency of our algorithms and also present numerical results that demonstrate the strong performance of our algorithms.
      Chapter 3 studies an insurance-reinsurance network model that deals with default contagion risks with a particular aim of capturing cascading effects at the time of defaults. We capture these effects by finding an equilibrium allocation of settlements that can be found as the unique optimal solution of an optimization problem. We are able to obtain an asymptotic description of the most likely ways in which the default of a specific group of participants can occur, by solving a multidimensional Knapsack integer programming problem. We also propose a class of strongly efficient Monte Carlo estimators for computing the expected loss of the network conditioned on the failure of a specific set of companies.
      Chapter 4 discusses control schemes for maintaining low failure probability of a transmission system power line. We construct a stochastic differential equation to describe the temperature evolution in a line subject to stochastic exogenous factors such as ambient temperature, and present a solution to the resulting stochastic heat equation. A number of control algorithms designed to limit the probability that a line exceeds its critical temperature are provided.
The CP-conserving two-Higgs-doublet model: the approach to the decoupling limit
Creators: name: Gunion, John F.
name: Haber, Howard E.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A CP-even neutral Higgs boson with Standard-Model-like couplings may be the lightest scalar of a two-Higgs-doublet model. We study the decoupling limit of the most general CP-conserving two-Higgs-doublet model, where the mass of the lightest Higgs scalar is significantly smaller than the masses of the other Higgs bosons of the model. In this case, the properties of the lightest Higgs boson are nearly indistinguishable from those of the Standard Model Higgs boson. The first non-trivial corrections to Higgs couplings in the approach to the decoupling limit are also evaluated. The importance of detecting such deviations in precision Higgs measurements at future colliders is emphasized. We also clarify the case in which a neutral Higgs boson can possess Standard-Model-like couplings in a regime where the decoupling limit does not apply. The two-Higgs-doublet sector of the minimal supersymmetric model illustrates many of the above features.
description: 54 pages, 2 tables, revtex4 format, some new material added (including elegant forms for the three-Higgs and four-Higgs couplings) and typographical errors fixed
Machine learning method for single trajectory characterization
Creators: name: Muñoz-Gil, Gorka
name: Garcia-March, Miguel Angel
name: Manzo, Carlo
name: Martín-Guerrero, José D.
name: Lewenstein, Maciej
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Machine Learning (cs.LG)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In order to study transport in complex environments, it is extremely important to determine the physical mechanism underlying diffusion, and precisely characterize its nature and parameters. Often, this task is strongly impacted by data consisting of trajectories with short length and limited localization precision. In this paper, we propose a machine learning method based on a random forest architecture, which is able to associate even very short trajectories to the underlying diffusion mechanism with a high accuracy. In addition, the method is able to classify the motion according to normal or anomalous diffusion, and determine its anomalous exponent with a small error. The method provides highly accurate outputs even when working with very short trajectories and in the presence of experimental noise. We further demonstrate the application of transfer learning to experimental and simulated data not included in the training/testing dataset. This allows for a full, high-accuracy characterization of experimental trajectories without the need of any prior information.
description: Complementary code can be found in https://github.com/gorkamunoz/RF-Single-Trajectory-Characterization
title: Strukturuntersuchungen kraftfreier Magnetfelder
Creators: name: Richter, Egon
Publisher: name: Goltze
Year: 1991
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: 510

description: Kraftfreie Magnetfelder ergeben sich als Lösungen spezieller nichtlinearer partieller Differentialgleichungen, die häufig durch lineare Gleichungen ersetzt werden. Um die Vielfalt der Strukturen dieser Felder zu erfassen, ist eine Diskussion der nichtlinearen Bestimmungsgleichungen unvermeidbar.
Die Lie-Symmetriegruppen der verschiedenen Ausgangsgleichungen werden berechnet. Für eine ausgewählte Symmetrie werden verschiedene invariante Lösungen zur Darstellung kraftfreier Magnetfelder angegeben.
Additional file 1 of Unveiling the improved targeting migration of mesenchymal stem cells with CXC chemokine receptor 3-modification using intravital NIR-II photoacoustic imaging
Creators: name: Lin, Yuejun
name: Zhou, Hui-chao
name: Chen, Ningbo
name: Ren, Yaguang
name: Gao, Rongkang
name: Li, Qiaojia
name: Deng, Yiwen
name: Han, Xuejiao
name: Zhang, Xiaoran
name: Xiang, Andy Peng
name: Guo, Bing
name: Liu, Chengbo
name: Ren, Jie
Publisher: name: figshare
Year: 2022
Subjects: Biophysics
Biochemistry
Space Science
Medicine
Cell Biology
Chemical Sciences not elsewhere classified
Cancer

description: Additional file 1. Additional figures.
Quantum chaos with non-periodic, complex orbits in the Resonant Tunneling Diode
Creators: name: Saraga, D. S.
name: Monteiro, T. S.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We show that a special type of orbits, which are non-periodic and complex, 'Saddle Orbits' (SOs) describe accurately the quantal and experimental current oscillations in the Resonant Tunneling Diode in tilted fields. This is the first demonstration that one needs to abandon the periodic orbits (POs) paradigm in favour of this new and peculiar type of orbit. The SOs solve the puzzle of broad regions of experimental oscillations where we find no real or complex PO that can explain the data. The SOs succeeds in regimes involving several non-isolated POs, where PO formulas fail.
description: 3 pages, 5 figures
Olea europaea subsp. cuspidata Cif.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Oleaceae
Olea
Olea europaea
Olea europaea l. subsp. cuspidata (wall. & g.don) cif.

description: Olea europaea L. subsp. cuspidata (Wall. & G.Don) Cif.  —
Habit: Small tree or tree.
Habitat: LMWF, LMDF; 1 800–3 000 m. Distribution: II.
 Voucher: Near Lake Nkunga, Alt. 1 903 m, 8 Aug. 2015, SAJIT 003820 (HIB).
References: Fries (1923b), Bussmann (1993, 1994, 2006), Bussmann & Beck (1995a, 1995b, 1998, 1999), Gathaara (1999).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 80, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
OPERAS-P Deliverable D5.2: DOAB as a serivce
Creators: name: OPERAS Consortium
Publisher: name: Zenodo
Year: 2020
Subjects: OPERAS
OPERAS-P
research infrastructure
certificaion
open access book
peer review

description: This demonstrator concerns the OPERAS Certification service, one of OPERAS’ core services, and includes a description of the new service. The previous website of the DOAB infrastructure will be migrated from the current environment to the DSpace 6 platform, run by the OAPEN Foundation and hosted by Huma-Num.
Liouville Quantum Gravity
Creators: name: Li, Songyuan
name: Toumbas, Nicolaos
name: Troost, Jan
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We define a three-dimensional quantum theory of gravity as the holographic dual of the Liouville conformal field theory. The theory is consistent and unitary by definition. The corresponding theory of gravity with negative cosmological constant has peculiar properties. The quantum theory has no normalisable AdS3 vacuum. The model contains primary black holes with zero spin. All states can be interpreted as black holes dressed with boundary gravitons. There is a unique universal interaction between these states consistent with unitarity and the conformal symmetry of the model. This theory of gravity, though conceptually isolated from other models of quantum gravity, is worth scrutinising.
description: 26 pages, journal version
title: Ultrafilter-Abbildungen
Creators: name: Kowalsky, Hans-Joachim
Publisher: name: Goltze
Year: 1995
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: 510

description: Bei Strukturuntersuchungen von Ultrafiltern einer Grundmenge X spielen Punktabbildungen [phi]: X -> X einerseits eine wesentliche Rolle, andererseits erweisen sie sich aber auch als zu wenig flexibel. Weit mehr Möglichkeiten bietet die Benutzung von Filterabbildungen, die die Menge aller Filter von X in sich abbilden. Die nachfolgenden Untersuchungen beziehen sich auf eine spezielle Klasse von Filterabbildungen, die sich durch naheliegende Eigenschaften kennzeichnen lassen und die der Anwendung auf Ultrafilter in geeigneter Weise angepaßt sind, weswegen sie als Ultrafilter-Abbildungen oder kurz als U-Abbildungen bezeichnet werden sollen.
Hinsichtlich der Symbole und Bezeichnungen sei auf die Arbeiten "Filterabbildungen" und "Abzählbar primitive Ultrafilter I, II", Abhandlungen der Braunschweigischen Wissenschaftlichen Gesellschaft XLII, XLIII, XLIV verwiesen, die hier übernommen werden. Insbesondere sei darauf hingewiesen, daß für Filter a, b die Ordnungsrelation a =< b als zur mengentheoretischen Inklusion invers definiert ist, so daß der mit o bezeichnete Filter aller Teilmengen von X (einschließlich der leeren Menge) das Nullelement der geordneten Menge aller Filter ist. Entsprechend beziehen sich die Verbandsoperationen /\ und V auf diese Ordnungsrelation.
GRATIS: GeneRAting TIme Series with diverse and controllable characteristics
Creators: name: Kang, Yanfei
name: Hyndman, Rob J
name: Li, Feng
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: The explosion of time series data in recent years has brought a flourish of new time series analysis methods, for forecasting, clustering, classification and other tasks. The evaluation of these new methods requires either collecting or simulating a diverse set of time series benchmarking data to enable reliable comparisons against alternative approaches. We propose GeneRAting TIme Series with diverse and controllable characteristics, named GRATIS, with the use of mixture autoregressive (MAR) models. We simulate sets of time series using MAR models and investigate the diversity and coverage of the generated time series in a time series feature space. By tuning the parameters of the MAR models, GRATIS is also able to efficiently generate new time series with controllable features. In general, as a costless surrogate to the traditional data collection approach, GRATIS can be used as an evaluation tool for tasks such as time series forecasting and classification. We illustrate the usefulness of our time series generation process through a time series forecasting application.
Investigation of the Interior of Colored Black Holes and the Extendability of Solutions of the Einstein-Yang/Mills Equations
Creators: name: Smoller, J. A.
name: Wasserman, A. G.
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We prove that any asymptotically flat solution to the spherically symmetric SU(2) Einstein-Yang/Mills equations is globally defined. This result applies in particular to the interior of colored black holes.
description: Latex, 8 gif figures
title: Über geschlossene Raumkurven mit der Parameter-Darstellung x(t), für die [Kurvenintegral]x x dx = 0 gilt
Creators: name: Müller, Hans
Publisher: name: Goltze
Year: 1995
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: 510

description: In einer früheren Untersuchung hatte ich gezeigt, wie man mit Hilfe von trigonometrischen Polynomen bzw. Fourier-Reihen im 3-dimensionalen euklidischen Raum zu geschlossenen Raumkurven x(t) konstruktiv gelangen kann, deren Normalprojektionen auf beliebige Ebenen des Raumes zu ebenen Kurven vom orientierten Flächeninhalt Null führen. Kennzeichnend für diese Kurvenklasse ist [Kurvenintegral]x x dx = 0.
Vorweg einige Bemerkungen: Der Projektionsstrahl durch einen Punkt einer solchen Kurve x(t) mit 0 =< t =< T bildet eine Erzeugende eines geschlossenen Zylinders, der durch Variieren von t entsteht. Hierbei sind die ebenen Schnitte zum Normalschnitt (Normalprojektion) affin. Alle Aussagen über Normalprojektionen gelten daher auch für allgemeine Parallelprojektionen (Schrägrisse). Der affine Charakter der Kurveneigenschaft, verschwindende Projektionsinhalte zu besitzen, läßt erkennen, daß diese Eigenschaft auch jeder zu x(t) affinen Raumkurve zukommt.
Die Raumkurven x(t) setzen wir in der Folge stets als geschlossen mit der Periode T, sowie glatt - bei Bedarf genügend oft stetig differentierbar - und singularitätenfrei, also ohne mehrfache Punkte, stationäre Tangenten usf. voraus. Um noch einige Eigenschaften dieser Kurvenklasse zu zeigen, beschränken wir uns des einfacheren Beweisgangs wegen auf Normalrisse.
Tailings mobilization estimates for dam breach studies
Creators: name: Fontaine, Daniel
name: Martin, Violeta
Publisher: name: The University of British Columbia
Year: 2017

description: Quantitative assessment of potential consequences caused by a flood from a dam breach of a tailings facility requires an estimate of the volume of water and tailings released during the breach. A methodology for estimating the volume of tailings mobilized by the free water stored in the pond and the resulting initial flood wave following a dam breach is presented. Tailings mobilization can be estimated as a function of the stored water volume and the physical characteristics of the tailings deposit. The result is an estimate of the total outflow consisting of volumes of free water, and tailings and interstitial water that could be potentially mobilized. This approach indicates that a larger operating pond would mobilize more tailings than a smaller pond. Similarly, a tailings deposit that is more consolidated or only partially saturated would result in a smaller volume of tailings being released in a breach. These are the primary attributes of stored tailings affecting the potential consequences of a breach. An understanding of these attributes allows the practitioner to use the results of the analysis as a decision making tool for decreasing the consequences of failure.
Decaying quantum turbulence in a two-dimensional Bose-Einstein condensate at finite temperature
Creators: name: Groszek, Andrew J.
name: Davis, Matthew J.
name: Simula, Tapio P.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We numerically model decaying quantum turbulence in two-dimensional disk-shaped Bose-Einstein condensates, and investigate the effects of finite temperature on the turbulent dynamics. We prepare initial states with a range of condensate temperatures, and imprint equal numbers of vortices and antivortices at randomly chosen positions throughout the fluid. The initial states are then subjected to unitary time-evolution within the c-field methodology. For the lowest condensate temperatures, the results of the zero temperature Gross-Pitaevskii theory are reproduced, whereby vortex evaporative heating leads to the formation of Onsager vortex clusters characterised by a negative absolute vortex temperature. At higher condensate temperatures the dissipative effects due to vortex-phonon interactions tend to drive the vortex gas towards positive vortex temperatures dominated by the presence of vortex dipoles. We associate these two behaviours with the system evolving toward an anomalous non-thermal fixed point, or a Gaussian thermal fixed point, respectively.
description: 20 pages, 6 figures, SciPost format. Updated version includes a new section with further analysis and an additional figure
Radiative corrections to all charge assignments of heavy quark baryon semileptonic decays
Creators: name: Martinez, A.
name: Torres, J. J.
name: Garcia, A.
name: Flores-Mendieta, Ruben
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In semileptonic decays of spin-1/2 baryons containing heavy quarks up to six charge assignments for the baryons and lepton are possible. We show that the radiative corrections to four of these possibilities can be directly obtained from the final results of the two possibilities previously studied. There is no need to recalculate integrals over virtual or real photon momentum or any traces.
description: 15 pages, 2 figures, RevTex. Extended discussion. Final version to appear in Physical Review D
A Method for Convex Black-Box Integer Global Optimization
Creators: name: Larson, Jeffrey
name: Leyffer, Sven
name: Palkar, Prashant
name: Wild, Stefan M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We study the problem of minimizing a convex function on a nonempty, finite subset of the integer lattice when the function cannot be evaluated at noninteger points. We propose a new underestimator that does not require access to (sub)gradients of the objective but, rather, uses secant linear functions that interpolate the objective function at previously evaluated points. These linear mappings are shown to underestimate the objective in disconnected portions of the domain. Therefore, the union of these conditional cuts provides a nonconvex underestimator of the objective. We propose an algorithm that alternates between updating the underestimator and evaluating the objective function. We prove that the algorithm converges to a global minimum of the objective function on the feasible set. We present two approaches for representing the underestimator and compare their computational effectiveness. We also compare implementations of our algorithm with existing methods for minimizing functions on a subset of the integer lattice. We discuss the difficulty of this problem class and provide insights into why a computational proof of optimality is challenging even for moderate problem sizes.
Solanum giganteum Jacq.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Solanales
Solanaceae
Solanum
Solanum giganteum

description: Solanum giganteum Jacq.  —
Habit: Shrub.
Habitat: LMWF; up to 2 500 m. Distribution: I.
 Voucher: Ragati North Forest, Alt. 2088 m, 12 Jan. 1967, E.A.A.F.R.O. Staff 60 (EA).
References: Blundell (1987), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 80, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Lagrangian Dynamics in High-Dimensional Point-Vortex Systems
Creators: name: Weiss, Jeffrey B.
name: Provenzale, Antonello
name: McWilliams, James C.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the Lagrangian dynamics of systems of N point vortices and passive particles in a two-dimensional, doubly periodic domain. The probability distribution function of vortex velocity, p_N, has a slow-velocity Gaussian component and a significant high-velocity tail caused by close vortex pairs. In the limit for N -> oo, p_N tends to a Gaussian. However, the form of the single-vortex velocity causes very slow convergence with N; for N ~ 10^6 the non-Gaussian high-velocity tails still play a significant role. At finite N, the Gaussian component is well modeled by an Ornstein-Uhlenbeck (OU) stochastic process with variance sigma_N = sqrt{N ln N /2 pi}. Considering in detail the case N=100, we show that at short times the velocity autocorrelation is dominated by the Gaussian component and displays an exponential decay with a short Lagrangian decorrelation time. The close pairs have a long correlation time and cause nonergodicity over at least the time of the integration. Due to close vortex dipoles the absolute dispersion differs significantly from the OU prediction, and shows evidence of long-time anomalous dispersion. We discuss the mathematical form of a new stochastic model for the Lagrangian dynamics, consisting of an OU model combined with long-lived close same-sign vortices engaged in rapid rotation and long-lived close dipoles engaged in ballistic motion. From a dynamical-systems perspective this work indicates that systems of dimension O(100) can have behavior which is a combination of both low-dimensional behavior, i.e. close pairs, and extremely high-dimensional behavior described by traditional stochastic processes.
description: 48 pages, 17 figures, to appear in Physics of Fluids
Quantifying Reconstruction Uncertainty using Probabilistic Graphical Models
Creators: name: Peters, Christina
Publisher: name: Zenodo
Year: 2021

description: The success of convolutional neural networks (CNNs) in computer vision has resulted in techniques that have been widely adopted within the physical sciences. For instance, CNNs are often used in reconstruction of particle interactions, where the physical processes occurring within a detector are inferred from sensor observables. However, such techniques provide a single locally optimal solution (i.e., energy or particle type) rather than a posterior probability distribution. This is a major deficiency of CNNs, as experimental science relies on uncertainties when comparing different measurements. Additionally, a CNN rarely provides a physically interpretable model that can provide insight into the physical processes of the system. Probabilistic graphical models (PGMs) represent a system as a graph whose nodes are probabilistic variables, while edges represent dependencies among the variables. Such a representation readily allows incorporating domain knowledge into the model through setting constraints over types and values of the variables as well as over the graph structure. These graph-based representations model complex systems compactly, capturing uncertainty that is inherent in both the modeled system and in the predictions made by using the model. PGMs can be used to compute the posterior probability over a variable of interest and are readily interpretable by a scientist who wishes to understand the model's properties. Within the DIDACTS collaboration (https://didacts.org), we have been exploring how PGMs can be applied within particle physics. In doing so, we aim to provide machine learning methods that are more appropriate to these applications. We aim to explicitly model uncertainty when using machine learning methods in the context of direct-detection of dark matter in XENON1T, which is a rare-event search whereby uncertainty on position is a critical parameter to sensitivity. In this talk I will give an introduction to PGMs at the level of a tutorial. I will then demonstrate how these techniques translate to our application of reconstruction of dark matter events in XENON1T.
description: https://indico.fnal.gov/event/49237/ https://youtu.be/Ee4vVsg6WLE
Tenthredo nigroypsilon Haris 2004
Creators: name: Taeger, Andreas
name: París, Mercedes
name: Nieves-Aldrey, Jose Luis
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tenthredo
Tenthredo nigroypsilon

description: Tenthredo nigroypsilon Haris, 2004
A valid species, Tenthredo nigroypsilon Haris, 2004.
Type. Tenthredo nigroypsilon Haris, 2004a: 156–157. Holotype ♀, “ Sikkim ” (MNCN _Ent 100211, see http://dx.doi.org/10.6084/m9.figshare.763321). Paratypes: 3♀ same data (MNCN _ Ent 100212 see http:// dx.doi.org/10.6084/m9.figshare.850210, 100213 and 100214). Type locality: India, Sikkim. All specimens MNCN Cat. Tipos Nº 9877.
Discussion. The apex of the abdomen of the holotype is missing.
description: Published as part of Taeger, Andreas, París, Mercedes & Nieves-Aldrey, Jose Luis, 2014, The type specimens of sawflies (Hymenoptera: Symphyta) of the Museo Nacional de Ciencias Naturales, Madrid, pp. 103-138 in Zootaxa 3790 (1) on page 126, DOI: 10.11646/zootaxa.3790.1.5, http://zenodo.org/record/4914035
Revisiting the classifications of 6d SCFTs and LSTs
Creators: name: Bhardwaj, Lakshya
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Gauge-theoretic anomaly cancellation predicts the existence of many 6d SCFTs and little string theories (LSTs) that have not been given a string theory construction so far. In this paper, we provide an explicit construction of all such "missing" 6d SCFTs and LSTs by using the frozen phase of F-theory. We conjecture that the full set of 6d SCFTs and LSTs is obtained by combining the set of theories constructed in this paper with the set of theories that have been constructed in earlier literature using the unfrozen phase of F-theory. Along the way, we demonstrate that there exist SCFTs that do not descend from LSTs via an RG flow.
description: 49 pages, v2: References added
Olea welwitschii Gilg & G. Schellenb.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Oleaceae
Olea
Olea welwitschii

description: Olea welwitschii (Knobl.)Gilg & G.Schellenb.  —
Habit:Tree.
Habitat:LMWF,LMDF;up to2 000 m.Distribution: II.
 Voucher: Lower Imenti Forest, Alt. 1 190 m, 26–28, Jun. 1974, Faden & Faden 74/901A (EA).
Reference: Fries (1923b).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 81, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
The conserved ASCL1/MASH-1 ortholog HLH-3 specifies sex-specific ventral cord motor neuron fate in caenorhabditis elegans
Creators: name: Perez, LM
name: Alfonso, Aixa
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Neural specification is regulated by one or many transcription factors that control expression of effector genes that mediate function and determine neuronal type. Here we identify a novel role for one conserved proneural factor, the bHLH protein HLH-3, implicated in the specification of sex-specific ventral cord motor neurons in C. elegans. Proneural genes act in early stages of neurogenesis in early progenitors, but here, we demonstrate a later role for hlh-3. First, we document that differentiation of the ventral cord type C motor neuron class (VC) within their neuron class, is dynamic in time and space. Expression of VC class-specific and subclass-specific identity genes is distinct through development and is dependent on the VC position along the A-P axis and their proximity to the vulva. Our characterization of the expression of VC class and VC subclass-specific differentiation markers in the absence of hlh-3 function reveals that VC fate specification, differentiation, and morphology requires hlh-3 function. Finally, we conclude that hlh-3 cell-autonomously specifies VC cell fate.
D5.4. Pilot evaluation report
Creators: name: Matamala, Anna
Publisher: name: Zenodo
Year: 2019
Subjects: Pilot 1 actions, professional users, end users

description: This document presents and analyses the results of pilot 1 actions in the ImAc project. It considers both pilot actions with professional users, who have assessed the tools, and with end users, who have assessed the interface and the subtitling presentation modes.
Minimal generating set of Sylow 2-subgroups commutator subgroup of alternating group. Commutator width in Sylow $p$-subgroups of alternating, symmetric groups and in the wreath product of groups
Creators: name: Skuratovskii, Ruslan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20B27, 20B22, 20F65, 20B07, 20E45

description: The size of minimal generating set for commutator of Sylow 2-subgroup of alternating group was found. Given a permutational wreath product of finite cyclic groups sequence we prove that the commutator width of such groups is 1 and we research some properties of its commutator subgroup. It was shown that $(Syl_2 A_{2^k})^2 = Syl'_2 (A_{2^k}), \, k>2$. A new approach to presentation of Sylow 2-subgroups of alternating group ${A_{2^{k}}}$ was applied. As a result the short proof that the commutator width of Sylow 2-subgroups of alternating group ${A_{2^{k}}}$, permutation group ${S_{2^{k}}}$ and Sylow $p$-subgroups of $Syl_2 A_{p^k}$ ($Syl_2 S_{p^k}$) are equal to 1 was obtained. Commutator width of permutational wreath product $B \wr C_n$ were investigated. It was proven that the commutator length of an arbitrary element of commutator of the wreath product of cyclic groups $C_{p_i}, \, p_i\in \mathbb{N} $ equals to 1. The commutator width of direct limit of wreath product of cyclic groups are found. As a corollary, it was shown that the commutator width of Sylows $p$-subgroups $Syl_2(S_{p^{k}})$ of symmetric $S_{p^{k}}$ and alternating groups $A_{p^{k}}$ $p \geq 2$ are also equal to 1. A recursive presentation of Sylows $2$-subgroups $Syl_2(A_{2^{k}})$ of $A_{2^{k}}$ was introduced. The structure of Sylows $2$-subgroups commutator of symmetric and alternating groups were investigated. For an arbitrary group $B$ an upper bound of commutator width of $C_p \wr B$ was founded.
description: arXiv admin note: substantial text overlap with arXiv:1812.10481, arXiv:1712.01401
The $ss \bar s \bar s$ tetraquark states and the newly observed structure $X(2239)$ by BESIII Collaboration
Creators: name: Lü, Qi-Fang
name: Wang, Kai-Lei
name: Dong, Yu-Bing
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the mass spectrum of the $ss \bar s \bar s$ tetraquark states within the relativized quark model. By solving the Schrödinger-like equation with the relativized potential, the masses of the $S-$ and $P-$wave $ss \bar s \bar s$ tetraquarks are obtained. The screening effects are also taken into account. It is found that the observed resonant structure $X(2239)$ in the $e^+e^- \to K^+K^-$ process by BESIII Collaboration can be assigned as a $P-$wave $1^{--}$ $ss \bar s \bar s$ tetraquark state. Furthermore, the radiative transition and strong decay behaviors of this structure are also estimated, which can provide helpful information for future experimental searches.
description: 7 pages, 2 figures. Add the strong decay behaviors. Version accepted by Chinese Physics C
Effective Degrees of Freedom at Chiral Restoration and the Vector Manifestation in HLS theory
Creators: name: Harada, Masayasu
name: Kim, Youngman
name: Rho, Mannque
name: Sasaki, Chihiro
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The question as to what the relevant effective degrees of freedom at the chiral phase transition are remains largely unanswered and must be addressed in confronting both terrestrial and space laboratory observations purporting to probe matter under extreme conditions. We address this question in terms of the vector susceptibility χ_V (VSUS in short) and the axial-vector susceptibility χ_A (ASUS in short) at the temperature-induced chiral transition. We consider two possible, albeit simplified, cases that are contrasting, one that is given by the standard chiral theory where only the pions figure in the vicinity of the transition and the other that is described by hidden local symmetry (HLS) theory with the Harada-Yamawaki vector manifestation (VM) where nearly massless vector mesons also enter. We find that while in the standard chiral theory, the pion velocity v_πproportional to the ratio of the space component f_π^s of the pion decay constant over the time component f_π^t tends to zero near chiral restoration with f_π^t\neq 0, in the presence of the vector mesons with vanishing mass, the result is drastically different: HLS with VM {\it predicts} that χ_V automatically equals χ_A in consistency with chiral invariance and that v_π\sim 1$ with $f_π^t\approx f_π^s\to 0 as T\to T_c. These results are obtained in the leading order in power counting but we expect their qualitative features to remain valid more generally in the chiral limit thanks to the VM point.
description: 32 pages, 2 figures
Streptocarpus glandulosissimus Engl.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Gesneriaceae
Streptocarpus
Streptocarpus glandulosissimus

description: Streptocarpus glandulosissimus Engl.  —
Habit: Herb.
Habitat: LMWF; 1 700–2 800 m. Distribution: II.
 Voucher: Near Castle Forest Station, Alt. 2071 m, 30 Jan. 2015, SAJIT 002990 (HIB).
References: Blundell (1987), Buussmann (1994), Bussmann & Beck (1995a), Darbyshire (2006), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 81, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464