cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Canonical heights on elliptic curves in characteristic p
Creators: name: Papanikolas, Matthew A.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11G05, 11G07, 11R58, 14G25

description: We define a new canonical height pairing on the rational points of elliptic curves over global function fields which takes values in the multiplicative group of a completion of the function field. This height serves as an analogue of both the classical Neron-Tate height and analytic p-adic heights. Our main result is that under some general hypotheses this pairing is non-degenerate.
description: 14 pages; final version
title: A p-adaptive discontinuous Galerkin method with hp-shock capturing
Creators: name: Mossier, Pascal
name: Beck, Andrea
name: Munz, Claus-Dieter
Publisher: name: Universität Stuttgart
Year: 2022
Subjects: subject: 620

description: In this work, we present a novel hybrid Discontinuous Galerkin scheme with hp-adaptivity capabilities for the compressible Euler equations. In smooth regions, an efficient and accurate discretization is achieved via local p-adaptation. At strong discontinuities and shocks, a finite volume scheme on an h-refined element-local subgrid gives robustness. Thus, we obtain a hp-adaptive scheme that exploits both the high convergence rate and efficiency of a p-adaptive high order scheme as well as the stable and accurate shock capturing abilities of a low order finite volume scheme, but avoids the inherent resolution loss through h-refinement. A single a priori indicator, based on the modal decay of the local polynomial solution representation, is used to distinguish between discontinuous and smooth regions and control the p-refinement. Our method is implemented as an extension to the open source software FLEXI. Hence, the efficient implementation of the method for high performance computers was an important criterion during the development. The efficiency of our adaptive scheme is demonstrated for a variety of test cases, where results are compared against non adaptive simulations. Our findings suggest that the proposed adaptive method produces comparable or even better results with significantly less computational costs.
DISSOCIATION AND SPECIFIC HEATS OF GAS HYDRATES UNDER SUBMARINE AND SUBLACUSTRINE ENVIRONMENTS
Creators: name: Nakagawa, Ryo
name: Hachikubo, Akihiro
name: Shoji, Hitoshi
Publisher: name: The University of British Columbia
Year: 2008

description: Dissociation and specific heats of synthetic methane and ethane hydrates were measured under high-pressure condition by using a heat-flow type calorimeter to understand thermodynamic properties of gas hydrates under submarine/sublacustrine environments. Ice powder was put into the sample cell and pressurized by methane and ethane up to 5MPa and 2MPa, respectively. After the completion of gas hydrate formation, samples were heated from 263K to 288K at the rate of 0.01 K min-1. Large negative peaks of heat flow corresponded to the dissociation of gas hydrates were detected in a temperature range 279-282K at a pressure of 5MPa for methane hydrate and 283-286K at 2MPa for ethane hydrate, respectively. We also obtained the specific heats of gas hydrates in the range 264-276K for methane and 264-282K for ethane under pressure.
Accuracy of Trace Formulas
Creators: name: Lakshminarayan, Arul
Publisher: name: arXiv
Year: 1996
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using quantum maps we study the accuracy of semiclassical trace formulas. The role of chaos in improving the semiclassical accuracy, in some systems, is demonstrated quantitatively. However, our study of the standard map cautions that this may not be most general. While studying a sawtooth map we demonstrate the rather remarkable fact that at the level of the time one trace even in the presence of fixed points on singularities the trace formula may be exact, and in any case has no logarithmic divergences observed for the quantum bakers map. As a byproduct we introduce fantastic periodic curves akin to curlicues.
description: 20 pages, uuencoded and gzipped, 1 LaTex text file and 9 PS files for figures
title: Luzula spicata
title: Ähren-Hainsimse (Luzula spicata)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 9 Bilder der Ähren-Hainsimse.
A High-Force Gripper with Embedded Multimodal Sensing for Powerful and Perception Driven Grasping
Creators: name: Del Bianco, Edoardo
name: Torielli, Davide
name: Rollo, Federico
name: Gasperini, Damiano
name: Laurenzi, Arturo
name: Baccelliere, Lorenzo
name: Muratore, Luca
name: Roveri, Marco
name: Tsagarakis, Nikos G.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Modern humanoid robots have shown their promising potential for executing various tasks involving the grasping and manipulation of objects using their end-effectors. Nevertheless, in the most of the cases, the grasping and manipulation actions involve low to moderate payload and interaction forces. This is due to limitations often presented by the end-effectors, which can not match their arm-reachable payload, and hence limit the payload that can be grasped and manipulated. In addition, grippers usually do not embed adequate perception in their hardware, and grasping actions are mainly driven by perception sensors installed in the rest of the robot body, frequently affected by occlusions due to the arm motions during the execution of the grasping and manipulation tasks. To address the above, we developed a modular high grasping force gripper equipped with embedded multi-modal perception functionalities. The proposed gripper can generate a grasping force of 110 N in a compact implementation. The high grasping force capability is combined with embedded multi-modal sensing, which includes an eye-in-hand camera, a Time-of-Flight (ToF) distance sensor, an Inertial Measurement Unit (IMU) and an omnidirectional microphone, permitting the implementation of perception-driven grasping functionalities.
 We extensively evaluated the grasping force capacity of the gripper by introducing novel payload evaluation metrics that are a function of the robot arm's dynamic motion and gripper thermal states. We also evaluated the embedded multi-modal sensing by performing perception-guided enhanced grasping operations.
description: 8 pages, 15 figures
title: Luzula alpinopilosa
title: Braune Hainsimse (Luzula alpinopilosa)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Luzula spadicea
subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 10 Bilder der Braunen Hainsimse.
Reinforced Room temperature spin filtering in chiral paramagnetic metallopeptides
Creators: name: Torres-Cavanillas, Ramón
name: Escorcia-Ariza, Garin
name: Brotons-Alcázar, Isaac
name: Sanchís-Gual, Roger
name: Mondal, Prakash Chandra
name: Rosaleny, Lorena E.
name: Giménez-Santamarina, Silvia
name: Sessolo, Michele
name: Galbiati, Marta
name: Tatay, Sergio
name: Gaita-Ariño, Alejandro
name: Forment-Aliaga, Alicia
name: Cardona-Serra, Salvador
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Chiral-induced spin selectivity (CISS), whereby helical molecules polarize the spin of electrical current, is an intriguing effect with potential applications in nanospintronics. In this nascent field, the study of paramagnetic chiral molecules, which could introduce another degree of freedom in the control of the spin transport, remains so far unexplored. To address this challenge, herein, we propose the use of self-assembled monolayers of helical lanthanide-binding peptides. In order to elucidate the effect of the paramagnetic nuclei, monolayers of the peptide coordinating paramagnetic or diamagnetic ions are prepared. By means of spin-dependent electrochemistry, CISS effect is demonstrated by cyclic voltammetry and impedance measurements for both samples. Additionally, an implementation of the standard liquid-metal drop electron transport setup has been carried out, demonstrating their suitability for solid-state devices. Remarkably, the inclusion of a paramagnetic center in the peptide increases the spin polarization as independently proved by different techniques. These findings permit the inclusion of magnetic biomolecules in the CISS field, paving the way to their implementation in a new generation of spintronic nanodevices.
Log-concavity of level Hilbert functions and pure $O$-sequences
Creators: name: Zanello, Fabrizio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary: 13D40, Secondary: 05E40, 13E10, 13H10

description: We investigate log-concavity in the context of level Hilbert functions and pure $O$-sequences, two classes of numerical sequences introduced by Stanley in the late Seventies whose structural properties have since been the object of a remarkable amount of interest in combinatorial commutative algebra. However, a systematic study of the log-concavity of these sequences began only recently, thanks to a paper by Iarrobino.
 The goal of this note is to address two general questions left open by Iarrobino's work: 1) Given the integer pair $(r,t)$, are all level Hilbert functions of codimension $r$ and type $t$ log-concave? 2) How about pure $O$-sequences with the same parameters?
 Iarrobino's main results consisted of a positive answer to 1) for $r=2$ and any $t$, and for $(r,t)=(3,1)$. Further, he proved that the answer to 1) is negative for $(r,t)=(4,1)$.
 Our chief contribution to 1) is to provide a negative answer in all remaining cases, with the exception of $(r,t)=(3,2)$, which is still open in any characteristic. We then propose a few detailed conjectures specifically on level Hilbert functions of codimension 3 and type 2.
 As for question 2), we show that the answer is positive for all pairs $(r,1)$; negative for $(r,t)=(3,4)$; and negative for any pair $(r,t)$ with $r\ge 4$ and $2\le t\le r+1$. Interestingly, the main case that remains open is again $(r,t)=(3,2)$. Further, we conjecture that, in analogy with the behavior of arbitrary level Hilbert functions, log-concavity fails for pure $O$-sequences of any codimension $r\ge 3$ and type $t$ large enough.
description: Minor revisions. To appear in J. of Commutative Algebra
Mixing time of the adjacent walk on the simplex
Creators: name: Caputo, Pietro
name: Labbé, Cyril
name: Lacoin, Hubert
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: By viewing the $N$-simplex as the set of positions of $N-1$ ordered particles on the unit interval, the adjacent walk is the continuous time Markov chain obtained by updating independently at rate 1 the position of each particle with a sample from the uniform distribution over the interval given by the two particles adjacent to it. We determine its spectral gap and prove that both the total variation distance and the separation distance to the uniform distribution exhibit a cutoff phenomenon, with mixing times that differ by a factor $2$. The results are extended to the family of log-concave distributions obtained by replacing the uniform sampling by a symmetric log-concave Beta distribution.
The symmetry of intersection numbers in group theory
Creators: name: Scott, Peter
Publisher: name: arXiv
Year: 1997
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F32, 20E06, 20E07, 20E08, 57M07

description: For suitable subgroups of a finitely generated group, we define the intersection number of one subgroup with another subgroup and show that this number is symmetric. We also give an interpretation of this number.
description: 19 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTVol2/paper2.abs.html . Includes erratum added to the original, published 19 Mar 1998
Bouncing behavior and dissipative characterization of a chain-filled granular damper
Creators: name: Xu, Cheng
name: Zheng, Ning
name: Liang-Sheng
name: Shi, Qing-fan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We have experimentally investigated the bouncing behavior and damping performance of a container partially filled with granular chains, namely a chain-filled damper. The motion of the chain-filled damper, recorded by a particle tracing technology, demonstrates that the granular chains can efficiently absorb the collisional energy of the damper. We extract both the restitution coefficient of the first collision and the total flight time to characterize the dissipation ability of the damper. Two containers and three types of granular chains, different in size, stiffness and restitution coefficient, are used to examine the experimental results. We find that the restitution coefficient of the first collision of a single-chain-filled damper can linearly tend to vanish with increasing the chain length and obtain a minimum filling mass required to cease the container at the first collision (no rebound). When the strong impact occurs, the collisional absorption efficiency of a chain-filled damper is superior to a monodisperse-particle-filled damper. Furthermore, the longer the chains are, the better the dissipative effect is.
On Wlodarczyk's embedding theorem
Creators: name: Hausen, Juergen
Publisher: name: arXiv
Year: 2000
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E25, 14M25

description: We prove the following version of Wlodarczyk's Embedding Theorem: Every normal complex algebraic ${\bf C}^*$-variety admits an equivariant closed embedding into a toric prevariety $X$ on which ${\bf C}^*$ acts as a one-parameter-subgroup of the big torus of $X$.
description: 24 pages, 1 figure
A Riemann Hypothesis for characteristic p L-functions
Creators: name: Goss, David
Publisher: name: arXiv
Year: 1999
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G09

description: We propose analogs of the classical Generalized Riemann Hypothesis and the Generalized Simplicity Conjecture for the characteristic p L-series associated to function fields over a finite field. These analogs are based on the use of absolute values. Further we use absolute values to give similar reformulations of the classical conjectures (with, perhaps, finitely many exceptional zeroes). We show how both sets of conjectures behave in remarkably similar ways.
description: This is the final version (with new title) as it will appear in the Journal of Number Theory
Energy-scaling of the product state distribution for three-body recombination of ultracold atoms
Creators: name: Haze, Shinsuke
name: D'Incao, José P.
name: Dorer, Dominik
name: Li, Jinglun
name: Deiß, Markus
name: Tiemann, Eberhard
name: Julienne, Paul S.
name: Denschlag, Johannes Hecker
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Three-body recombination is a chemical reaction where the collision of three atoms leads to the formation of a diatomic molecule. In the ultracold regime it is expected that the production rate of a molecule generally decreases with its binding energy $E_b$, however, its precise dependence and the physics governing it have been left unclear so far. Here, we present a comprehensive experimental and theoretical study of the energy dependency for three-body recombination of ultracold Rb. For this, we determine production rates for molecules in a state-to-state resolved manner, with the binding energies $E_b$ ranging from 0.02 to 77 GHz$\times h$. We find that the formation rate approximately scales as $E_b^{-α}$, where $α$ is in the vicinity of 1. The formation rate typically varies only within a factor of two for different rotational angular momenta of the molecular product, apart from a possible centrifugal barrier suppression for low binding energies. In addition to numerical three-body calculations we present a perturbative model which reveals the physical origin of the energy scaling of the formation rate. Furthermore, we show that the scaling law potentially holds universally for a broad range of interaction potentials.
description: 15 pages, 13 figures
Tutorial and Practice in Linear Programming: Optimization Problems in Supply Chain and Transport Logistics
Creators: name: Bridgelall, Raj
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Artificial Intelligence (cs.AI)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: This tutorial is an andragogical guide for students and practitioners seeking to understand the fundamentals and practice of linear programming. The exercises demonstrate how to solve classical optimization problems with an emphasis on spatial analysis in supply chain management and transport logistics. All exercises display the Python programs and optimization libraries used to solve them. The first chapter introduces key concepts in linear programming and contributes a new cognitive framework to help students and practitioners set up each optimization problem. The cognitive framework organizes the decision variables, constraints, the objective function, and variable bounds in a format for direct application to optimization software. The second chapter introduces two types of mobility optimization problems (shortest path in a network and minimum cost tour) in the context of delivery and service planning logistics. The third chapter introduces four types of spatial optimization problems (neighborhood coverage, flow capturing, zone heterogeneity, service coverage) and contributes a workflow to visualize the optimized solutions in maps. The workflow creates decision variables from maps by using the free geographic information systems (GIS) programs QGIS and GeoDA. The fourth chapter introduces three types of spatial logistical problems (spatial distribution, flow maximization, warehouse location optimization) and demonstrates how to scale the cognitive framework in software to reach solutions. The final chapter summarizes lessons learned and provides insights about how students and practitioners can modify the Phyton programs and GIS workflows to solve their own optimization problem and visualize the results.
description: Tiny Textbook for Pedagogical Aid. Basel, Switzerland: MDPI
title: Verbascum nigrum
title: Schwarze Königskerze (Verbascum nigrum)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 14 Bilder der Schwarzen Königskerze.
A note on extremal Sombor indices of trees with a given degree sequence
Creators: name: Damnjanović, Ivan
name: Milošević, Marko
name: Stevanović, Dragan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We note here that the problem of determining extremal values of Sombor index for trees with a given degree sequence fits within the framework of results by Hua Wang from [Cent. Eur. J. Math. 12 (2014) 1656-1663], implying that the greedy tree has the minimum Sombor index, while an alternating greedy tree has the maximum Sombor index.
Additional file 9 of The global and promoter-centric 3D genome organization temporally resolved during a circadian cycle
Creators: name: Furlan-Magaril, Mayra
name: Ando-Kuri, Masami
name: Arzate-Mejía, Rodrigo G.
name: Morf, Jörg
name: Cairns, Jonathan
name: Román-Figueroa, Abraham
name: Tenorio-Hernández, Luis
name: Poot-Hernández, A. César
name: Andrews, Simon
name: Várnai, Csilla
name: Virk, Boo
name: Wingett, Steven W.
name: Fraser, Peter
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 9. Review history.
Super Quantum Airy Structures
Creators: name: Bouchard, Vincent
name: Ciosmak, Paweł
name: Hadasz, Leszek
name: Osuga, Kento
name: Ruba, Blazej
name: Sułkowski, Piotr
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We introduce super quantum Airy structures, which provide a supersymmetric generalization of quantum Airy structures. We prove that to a given super quantum Airy structure one can assign a unique set of free energies, which satisfy a supersymmetric generalization of the topological recursion. We reveal and discuss various properties of these supersymmetric structures, in particular their gauge transformations, classical limit, peculiar role of fermionic variables, and graphical representation of recursion relations. Furthermore, we present various examples of super quantum Airy structures, both finite-dimensional -- which include well known superalgebras and super Frobenius algebras, and whose classification scheme we also discuss -- as well as infinite-dimensional, that arise in the realm of vertex operator super algebras.
description: 68 pages, published version (references added, minor corrections in Section 2)
title: Contending With Feminism: Women's Health Issues in Margaret Atwood's Early Fiction
Creators: name: Braun, Kirsten
Publisher: name: Griffith University
Year: 2006
Subjects: subject: Margaret Atwood
subject: popular fiction
subject: women in literature
subject: feminism

description: Margaret Atwood's early fiction provides a valuable insight into issues surrounding the establishment of the women's health movement. From The Edible Woman in 1969 to The Handmaid's Tale in 1985, Atwood's work takes up key issues of the movement during this time. Her fiction explores a number of women's health topics including contraception, abortion, birthing, assisted reproductive technologies, eating disorders and breast cancer. Atwood's interest in the appearance of victims in Canadian literature, however, leads to a rejection of the notion that women are fated victims of patriarchal institutions like medicine. This thesis argues that while she does not deny women can be victims, she refuses to accept that this role is inevitable. Foucault's later constructions of power and resistance are explored with the female protagonists refusing to believe their situations are inescapable. Atwood's recognition of her role as a popular fiction writer and her refusal to wear the 'feminist' label allow her the space to critique the women's health movement. Her early fiction exposes the absolutism of the movement and demonstrates its limitations in accounting for women's diversity.
title: Verbascum lychnitis
title: Mehlige Königskerze (Verbascum lychnitis)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 11 Bilder der Mehligen Königskerze.
Exoplanet Exergy: Why useful work matters for planetary habitabilty
Creators: name: Scharf, Caleb
Publisher: name: arXiv
Year: 2019
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The circumstellar habitable zone and its various refinements serves as a useful entry point for discussing the potential for a planet to generate and sustain life. But little attention is paid to the quality of available energy in the form of stellar photons for phototrophic (e.g. photosynthetic) life. This short paper discusses the application of the concept of exergy to exoplanetary environments and the evaluation of the maximum efficiency of energy use, or maximum work obtainable from electromagnetic radiation. Hotter stars provide temperate planets with higher maximum obtainable work with higher efficiency than cool stars, and cool planets provide higher efficiency of radiation conversion from the same stellar photons than do hot planets. These statements are independent of the details of any photochemical and biochemical mechanisms and could produce systematic differences in planetary habitability, especially at the extremes of maximal or minimal biospheres, or at critical ecological tipping points. Photoautotrophic biospheres on habitable planets around M-dwarf stars may be doubly disadvantaged by lower fluxes of photosynthetically active photons, and lower exergy with lower energy conversion efficiency.
description: 8 pages, 2 figures, accepted for publication in ApJ (version replaced 03/25/19)
title: Chelidonium majus
title: Schöllkraut (Chelidonium majus)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 5 Bilder des Schöllkrauts.
Beyond Labeling: Using Clustering to Build Network Behavioral Profiles of Malware Families
Creators: name: Nadeem, Azqa
name: Hammerschmidt, Christian
name: Gañán, Carlos H.
name: Verwer, Sicco
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Malware family labels are known to be inconsistent. They are also black-box since they do not represent the capabilities of malware. The current state-of-the-art in malware capability assessment include mostly manual approaches, which are infeasible due to the ever-increasing volume of discovered malware samples. We propose a novel unsupervised machine learning-based method called MalPaCA, which automates capability assessment by clustering the temporal behavior in malware's network traces. MalPaCA provides meaningful behavioral clusters using only 20 packet headers. Behavioral profiles are generated based on the cluster membership of malware's network traces. A Directed Acyclic Graph shows the relationship between malwares according to their overlapping behaviors. The behavioral profiles together with the DAG provide more insightful characterization of malware than current family designations. We also propose a visualization-based evaluation method for the obtained clusters to assist practitioners in understanding the clustering results. We apply MalPaCA on a financial malware dataset collected in the wild that comprises of 1.1k malware samples resulting in 3.6M packets. Our experiments show that (i) MalPaCA successfully identifies capabilities, such as port scans and reuse of Command and Control servers; (ii) It uncovers multiple discrepancies between behavioral clusters and malware family labels; and (iii) It demonstrates the effectiveness of clustering traces using temporal features by producing an error rate of 8.3%, compared to 57.5% obtained from statistical features.
description: Accepted as a chapter in Springer MAAIDL 2020
Examining Social Networks of Infant and Young Child Caregiving in Uganda and its Association with Maternal Depression
Creators: Kao, Chien-Wen
Publisher: name: Columbia University
Year: 2020
Subjects: Clinical psychology
Mental health
Depression, Mental
Social networks
Child caregivers
Spousal abuse

description: Despite the growing global momentum and commitment to addressing child malnutrition over the past few decades, undernutrition in children remains a global health crisis, particularly in low- and middle-income countries (LMICs), and leads to deleterious physical and cognitive effects on children. The maternal social network has been linked to child development and health outcomes, partially through its effect on maternal depression, which in turn affects maternal behavior and child health. However, there is limited research in LMICs broadly and in Uganda specifically on the infant/young child caregiving social network, the social network through which mothers receive infant/young child caregiving assistance. This mixed-methods dissertation study piloted and refined a measure to capture this infant/young child caregiving social network in northern Uganda, and then examined sample descriptive data and the associations between networks’ characteristics and maternal depression using a social network analysis (SNA) approach. We also qualitatively examined challenges, barriers, and facilitators to infant and young child caregiving social support. Results found the social network measure to be feasible, acceptable, and comprehensible, and refinements were added to further increase clarity and suitability to the cultural context. Quantitative analyses found higher maternal depression severity to be significantly correlated with lower support on several network characteristics including the average number of caregiving tasks people assisted with, the number of people helping with advanced tasks, and the network density. Further exploration showed that higher network density was also correlated with higher number of tasks alters assisted with. Qualitative results found that mothers often experienced multiple ongoing challenges and barriers in their relationships, such as chronic spousal abuse and financial restriction, and highlighted a lack of systemic support and interventions to address these challenges. We also found several facilitators that helped mothers obtain much needed caregiving support, such as through their older children or Food for the Hungry, a non-profit organization. Though larger future studies are needed to corroborate findings, results of the study may inform interventions for maternal depression and child nutrition/health, identifying possible targets such as network density and highlighting the importance of addressing specific chronic barriers to caregiving social support. Lastly, we also developed a measure that may be used in future studies to examine caregiving networks as a mechanism of change in existing interventions.
Multiplicity dependence of charged-particle production in pp, p-Pb, Xe-Xe and Pb-Pb collisions at the LHC
Creators: name: ALICE Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Multiplicity ($N_{\rm ch}$) distributions and transverse momentum ($p_{\rm T}$) spectra of inclusive primary charged particles in the kinematic range of $|η| < 0.8$ and 0.15 GeV/$c$ $< p_{T} <$ 10 GeV/$c$ are reported for pp, p-Pb, Xe-Xe and Pb-Pb collisions at centre-of-mass energies per nucleon pair ranging from $\sqrt{s_{\rm NN}} = 2.76$ TeV up to $13$ TeV. A sequential two-dimensional unfolding procedure is used to extract the correlation between the transverse momentum of primary charged particles and the charged-particle multiplicity of the corresponding collision. This correlation sharply characterises important features of the final state of a collision and, therefore, can be used as a stringent test of theoretical models. The multiplicity distributions as well as the mean and standard deviation derived from the $p_{\rm T}$ spectra are compared to state-of-the-art model predictions. Providing these fundamental observables of bulk particle production consistently across a wide range of collision energies and system sizes can serve as an important input for tuning Monte Carlo event generators.
description: 33 pages, 13 captioned figures, 2 tables, authors from page 28, published version + fix from erratum, figures at http://alice-publications.web.cern.ch/node/8689
LHC sensitivity to singly-charged scalars decaying into electrons and muons
Creators: name: Alcaide, Julien
name: Mileo, Nicolás I.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Current LHC searches for non-supersymmetric singly-charged scalars, based on Two-Higgs-Doublet models, in general focus the analysis on third-generation fermions in the final state. However, singly-charged scalars in alternative extensions of the scalar sector involve Yukawa couplings not proportional to the mass of the fermions. Assuming the scalar decays into electrons and muons, it can manifest cleaner experimental signatures. In this paper we suggest that a singly-charged scalar singlet, with electroweak production, can start to be probed in the near future with dedicated search strategies. Depending on the strength of the Yukawa couplings, two independent scenarios are considered: direct pair-production (small couplings) and single-production via virtual neutrino exchange (large couplings). We show that, up to a mass as large as 500 GeV, most of the parameter space could be excluded at the 95% C.L. in a high-luminosity phase of the LHC. Our results also apply to other frameworks, provided the singly-charged scalar exhibits similar production patterns and dominant decay modes.
description: 15 pages, 8 figures
Lyapunov Exponents from Kinetic Theory for a Dilute, Field-driven Lorentz Gas
Creators: name: van Beijeren, H.
name: Dorfman, J. R.
name: Cohen, E. G. D.
name: Posch, H. A.
name: Dellago, Ch.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Positive and negative Lyapunov exponents for a dilute, random, two-dimensional Lorentz gas in an applied field, $\vec{E}$, in a steady state at constant energy are computed to order $E^{2}$. The results are: $λ_{\pm}=λ_{\pm}^{0}-a_{\pm}(qE/mv)^{2}t_{0}$ where $λ_{\pm}^{0}$ are the exponents for the field-free Lorentz gas, $a_{+}=11/48, a_{-}=7/48$, $t_{0}$ is the mean free time between collisions, $q$ is the charge, $m$ the mass and $v$ is the speed of the particle. The calculation is based on an extended Boltzmann equation in which a radius of curvature, characterizing the separation of two nearby trajectories, is one of the variables in the distribution function. The analytical results are in excellent agreement with computer simulations. These simulations provide additional evidence for logarithmic terms in the density expansion of the diffusion coefficient.
description: 7 pages, revtex, 3 postscript figures
Additional file 2: of Metabolomic studies as a tool for determining the post-mortem interval (PMI) in stillborn calves
Creators: name: Jawor, Paulina
name: Ząbek, Adam
name: Wojtowicz, Wojciech
name: Król, Dawid
name: Stefaniak, Tadeusz
name: Młynarz, Piotr
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Table S2. Changes among metabolites of urine samples. (DOCX 36 kb)
title: Malva sylvestris
title: Wilde Malve (Malva sylvestris)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 11 Bilder der Wilden Malve.
Examining Uncertainty and Misspecification of Attributes in Cognitive Diagnostic Models
Creators: Chen, Chen-Miao Carol
Publisher: name: Columbia University
Year: 2013
Subjects: Psychometrics

description: In recent years, cognitive diagnostic models (CDMs) have been widely used in educational assessment to provide a diagnostic profile (mastery/non-mastery) analysis for examinees, which gives insights into learning and teaching. However, there is often uncertainty about the specification of the Q-matrix that is required for CDMs, given that it is based on expert judgment. The current study uses a Bayesian approach to examine recovery of Q-matrix elements in the presence of uncertainty about some elements. The first simulation examined the situation where there is complete uncertainty about whether or not an attribute is required, when in fact it is required. The simulation results showed that recovery was generally excellent. However, recovery broke down when other elements of the Q-matrix were misspecified. Further simulations showed that, if one has some information about the attributes for a few items, then recovery improves considerably, but this also depends on how many other elements are misspecified. A second set of simulations examined the situation where uncertain Q-matrix elements were scattered throughout the Q-matrix. Recovery was generally excellent, even when some other elements were misspecified. A third set of simulations showed that using more informative priors did not uniformly improve recovery. An application of the approach to data from TIMSS (2007) suggested some alternative Q-matrices.
A new class of entanglement measures
Creators: name: Rudolph, Oliver
Publisher: name: arXiv
Year: 2000
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce new entanglement measures on the set of density operators on tensor product Hilbert spaces. These measures are based on the greatest cross norm on the tensor product of the sets of trace class operators on Hilbert space. We show that they satisfy the basic requirements on entanglement measures discussed in the literature, including convexity, invariance under local unitary operations and non-increase under local quantum operations and classical communication.
description: Revised version accepted by J Math Phys, 12 pages, LaTeX, contains Sections 1-5 & 7 of the previous version. The previous Section 6 is now in quant-ph/0105104 and the previous Section 8 is superseded by quant-ph/0105017
title: Malva moschata
title: Moschus-Malve (Malva moschata)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 8 Bilder der Moschus-Malve.
Unitary representations of the quantum algebra su_q(2) on a real two-dimensional sphere for $q \in R^+$ or generic $q \in S^1$
Creators: name: Irac-Astaud, M.
name: Quesne, C.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: Some time ago, Rideau and Winternitz introduced a realization of the quantum algebra su_q(2) on a real two-dimensional sphere, or a real plane, and constructed a basis for its representations in terms of q-special functions, which can be expressed in terms of q-Vilenkin functions, and are related to little q-Jacobi functions, q-spherical functions, and q-Legendre polynomials. In their study, the values of q were implicitly restricted to $q \in R^+$. In the present paper, we extend their work to the case of generic values of $q \in S^1$ (i.e., q values different from a root of unity). In addition, we unitarize the representations for both types of q values, $q \in R^+$ and generic $q \in S^1$, by determining some appropriate scalar products. From the latter, we deduce the orthonormality relations satisfied by the q-Vilenkin functions.
description: 24 pages, LaTeX, uses amssym, 1 PostScript figure
title: Malva alcea
title: Rosen-Malve (Malva alcea)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Siegmarswurz
subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 7 Bilder der Rosen-Malve.
An inverse result for Wang's theorem on extremal trees
Creators: name: Damnjanović, Ivan
name: Ranđelović, Žarko
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C35, 05C05, 05C07, 05C92

description: Among all trees on $n$ vertices with a given degree sequence, how do we maximise or minimise the sum over all adjacent pairs of vertices $x$ and $y$ of $f(\mathrm{deg} x, \mathrm{deg} y)$? Here $f$ is a fixed symmetric function satisfying a 'monotonicity' condition that \[
 f(x, a) + f(y, b) > f(y, a) + f(x, b) \quad \mbox{for any $x > y$ and $a > b$} . \] These functions arise naturally in several areas of graph theory, particularly chemical graph theory.
 Wang showed that the so-called 'greedy' tree maximises this quantity, while an 'alternating greedy' tree minimises it. Our aim in this paper is to solve the inverse problem: we characterise precisely which trees are extremal for these two problems.
Kinematic Constraints on Spatial Curvature from Supernovae Ia and Cosmic Chronometers
Creators: name: Jesus, J. F.
name: Valentim, R.
name: Moraes, P. H. R. S.
name: Malheiro, M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An approach to estimate the spatial curvature $Ω_k$ from data independently of dynamical models is suggested, through kinematic parameterizations of the comoving distance ($D_{C}(z)$) with third degree polynomial, of the Hubble parameter ($H(z)$) with a second degree polynomial and of the deceleration parameter ($q(z)$) with first order polynomial. All these parameterizations were done as function of redshift $z$. We used SNe Ia dataset from Pantheon compilation with 1048 distance moduli estimated in the range $0.01
description: 9 pages, 8 figures. Text rewritten, references added and H(z) data have been replaced with cosmic chronometers in order to favour model independence
Examining Participation in Formal Education and  Exposure to Violence among Girls in the Democratic Republic of the Congo (DRC)
Creators: Landis, Debbie
Publisher: name: Columbia University
Year: 2018
Subjects: Education
Public health
Violence
Children and war
Girls--Education

description: Protection from violence, and access to formal education, are fundamental human rights for girls in conflict-affected societies.  And yet, war exposes girls to an increased risk of exposure to violence, and serves as a well-known barrier to their involvement in school.  While these risks are widely recognized within the fields of international education and humanitarian affairs, significant gaps exist within the peer-reviewed literature.  Existing studies tend to focus generally on violence against girls in conflict-affected societies without accounting for issues of education.  Or, studies focus exclusively on violence in and around school settings, although only investigate violence against students who are currently in school. As a result, the differential experiences with violence among girls based on varying levels of involvement (or lack thereof) in formal education are not well known.
      In light of these issues, this dissertation examines the relationship between girls’ level of participation in formal education, and exposure to violence in the Democratic Republic of the Congo (DRC), while accounting for Ecological factors (Bronfenbrenner, 1979) in girls’ lives, families, and communities.  A quantitative survey was conducted with girls (ages 10-14) and caregivers across 14 sites in South Kivu.  Findings suggest that higher levels of participation in formal education were associated with lower rates of violence among girls.  Child marriage— itself considered a form of violence according to human rights norms— was seen to disrupt the protective relationship between education and violence, and expose married girls to higher rates of violence overall.  Further, equitable gender norms on the part of girls and their caregivers emerged as significant factors contributing to girls’ involvement in higher levels of formal education.
      Taken cumulatively, findings from this research suggest a need to engage in Ecological interventions with girls, families, and communities in order to prevent the occurrence of violence and ensure that girls have access to formal education that is protective, of good quality, and promotes their overall development and well-being.   In addition to filling vital gaps in the literature, these findings hold the potential to inform program and policy development not only in the DRC, but in conflict-affected societies more broadly.
Unitary Representations of Noncompact Quantum Groups at Roots of Unity
Creators: name: Steinacker, Harold
Publisher: name: arXiv
Year: 1999
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Noncompact forms of the Drinfeld-Jimbo quantum groups U_q(g) with (H_i)* = H_i, (X_i^{+-})* = s_i X_i^{-+} for s_i= +-1 are studied at roots of unity. This covers g = so(n,2p), su(n,p), so*(2l), sp(n,p), sp(l,R), and exceptional cases. Finite-dimensional unitary representations are found for all these forms, for even roots of unity. Their classical symmetry induced by the Frobenius-map is determined, and the meaning of the extra quasi-classical generators appearing at even roots of unity is clarified. The unitary highest weight modules of the classical case are recovered in the limit q -> 1.
description: 23 pages, LaTeX. Typos corrected and some explanations added. To appear in Rev. Math. Phys
title: Interchanging space and time in nonlinear optics modeling and dispersion management models
Creators: name: Fukuizumi, Reika
name: Schneider, Guido
Publisher: name: Universität Stuttgart
Year: 2022
Subjects: subject: 510

description: Interchanging the role of space and time is widely used in nonlinear optics for modeling the evolution of light pulses in glass fibers. A phenomenological model for the mathematical description of light pulses in glass fibers with a periodic structure in this set-up is the so-called dispersion management equation. It is the purpose of this paper to answer the question whether the dispersion management equation or other modulation equations are more than phenomenological models in this situation. Using Floquet theory we prove that in case of comparable wave lengths of the light and of the fiber periodicity the NLS equation and NLS like modulation equations with constant coefficients can be derived and justified through error estimates under the assumption that rather strong stability and non-resonance conditions hold. This is the first NLS approximation result documented for time-periodic dispersive systems. We explain that the failure of these conditions allows us to prove that these modulation equations in general make wrong predictions. The reasons for this failure and the behavior of the system for a fiber periodicity much larger than the wave length of light shows that interchanging the role of space and time for glass fibers with a periodic structure leads to unwanted phenomena.