cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the accumulation of planetesimals near disc gaps created by protoplanets
Creators: name: Ayliffe, Ben A.
name: Laibe, Guillaume
name: Price, Daniel J.
name: Bate, Matthew R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We have performed three-dimensional two-fluid (gas-dust) hydrodynamical models of circumstellar discs with embedded protoplanets (3 - 333 M\oplu) and small solid bodies (radii 10cm to 10m). We find that high mass planets (\gtrsim Saturn mass) open sufficiently deep gaps in the gas disc such that the density maximum at the outer edge of the gap can very efficiently trap metre-sized solid bodies. This allows the accumulation of solids at the outer edge of the gap as solids from large radii spiral inwards to the trapping region. This process of accumulation occurs fastest for those bodies that spiral inwards most rapidly, typically metre-sized boulders, whilst smaller and larger objects will not migrate sufficiently rapidly in the discs lifetime to benefit from the process. Around a Jupiter mass planet we find that bound clumps of solid material, as large as several Earth masses, may form, potentially collapsing under self-gravity to form planets or planetesimals. These results are in agreement with Lyra et al. (2009), supporting their finding that the formation of a second generation of planetesimals or of terrestrial mass planets may be triggered by the presence of a high mass planet.
description: 14 pages, 10 figures. Accepted for publication in MNRAS
UAV-LiDAR and Structure from Motion Photogrammetry: Spatial Accuracy in Vegetated Terrain
Creators: name: Kucharczyk, Maja
Publisher: name: Arts
Year: 2017
Subjects: subject: Geography
subject: Physical Geography
subject: Remote Sensing
subject: unmanned aerial vehicle
subject: UAV

description: Multiview stereo images acquired by uninhabited / unmanned aerial vehicles (UAVs) in combination with structure from motion (SfM) photogrammetry have created new capacity to develop high-resolution geospatial data, but vertical error is typically higher in vegetated areas because the ground surface is not visible in stereo. Miniaturized LiDAR systems for UAVs have potential to overcome this limitation, but their vertical accuracy in different vegetation types is not well documented. This thesis evaluated the accuracy of UAV-LiDAR and UAV-SfM in six vegetation types: grasses (short and tall), shrubs (short and tall), and trees (deciduous and coniferous). Results indicate UAV-LiDAR was more accurate in estimating ground elevation in all types, while vegetation height accuracy was higher for some types with UAV-SfM. UAV-LiDAR consistently sampled sub-canopy tree structure, while UAV-SfM only captured tree tops. Several factors are proposed to explain these differences and direct future research.
Supplementary information for "Selective sweeps in growing microbial colonies"
Creators: name: Korolev, Kirill S
name: Müller, Melanie J I
name: Karahan, Nilay
name: Murray, Andrew W
name: Hallatschek, Oskar
name: Nelson, David R
Publisher: name: arXiv
Year: 2012
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: This is supplementary information for arXiv:1204.4896, which also appeared in Physical Biology 9, 026008 (2012). Main text abstract: Evolutionary experiments with microbes are a powerful tool to study mutations and natural selection. These experiments, however, are often limited to the well-mixed environments of a test tube or a chemostat. Since spatial organization can significantly affect evolutionary dynamics, the need is growing for evolutionary experiments in spatially structured environments. The surface of a Petri dish provides such an environment, but a more detailed understanding of microbial growth on Petri dishes is necessary to interpret such experiments. We formulate a simple deterministic reaction-diffusion model, which successfully predicts the spatial patterns created by two competing species during colony expansion. We also derive the shape of these patterns analytically without relying on microscopic details of the model. In particular, we find that the relative fitness of two microbial strains can be estimated from the logarithmic spirals created by selective sweeps. The theory is tested with strains of the budding yeast Saccharomyces cerevisiae, for spatial competitions with different initial conditions and for a range of relative fitnesses. The reaction-diffusion model also connects the microscopic parameters like growth rates and diffusion constants with macroscopic spatial patterns and predicts the relationship between fitness in liquid cultures and on Petri dishes, which we confirmed experimentally. Spatial sector patterns therefore provide an alternative fitness assay to the commonly used liquid culture fitness assays.
description: The main text is available as arXiv:1204.4896
Acoustic impact of airborne wind energy technology on the environment
Creators: name: Szűcs, Adrienn Mária
Publisher: name: Zenodo
Year: 2023
Subjects: airborne wind energy
acoustic emissions

description: The number of the renewable energy systems is continually growing as a consequence of the increasing energy deficit. Wind energy is one of the most promising types of the renewable energies, therefore, there is no wonder that many airborne wind energy harvesting systems are available today. The goal of the airborne wind energy systems (AWES) is to harvest energy from the upper-boundary layers thus ensuring more permanent renewable energy source by decreasing the influence of the weather on the working period of the wind technologies. But like all man made devices, AWES also have impacts on our environment which is emphatic regarding the damages additional to the current impacts. The questions are: what is the environmental footprint of this technology; and what is the specific environmental footprint of the prototypes? To answer these questions, firstly a sufficiently well developed prototype is needed to study the effects on the environment. On examining the literature, it is observed that acoustic impact is the most notable impact of the AWES. Due to the lack of data, a set up to acquire the noise emission data from the system and also to compare the acoustic level with the conventional wind turbines and a few house-devices was developed. In the end, the first results about the acoustic impact of an airborne wind energy system were obtained. The predominant acoustic source proves to be the flying kite, ahead of the generator and the tether. Comparing it with a conventional wind turbine ensures us about the environmental friendly being. Consequently, the airborne wind energy systems are one step closer for commercial exploitation with my result which prove with numbers that the technology has factually low-environmental acoustic impact.
Capturing the essence of folding and functions of biomolecules using Coarse-Grained Models
Creators: name: Hyeon, Changbong
name: Thirumalai, D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The distances over which biological molecules and their complexes can function range from a few nanometres, in the case of folded structures, to millimetres, for example during chromosome organization. Describing phenomena that cover such diverse length, and also time scales, requires models that capture the underlying physics for the particular length scale of interest. Theoretical ideas, in particular, concepts from polymer physics, have guided the development of coarse-grained models to study folding of DNA, RNA, and proteins. More recently, such models and their variants have been applied to the functions of biological nanomachines. Simulations using coarse-grained models are now poised to address a wide range of problems in biology.
description: 37 pages, 8 figures
H -> gamma gamma: a Comment on the Indeterminacy of Non-Gauge-Invariant Integrals
Creators: name: Piccinini, F.
name: Pilloni, A.
name: Polosa, A. D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We reanalyze the recent computation of the amplitude of the Higgs boson decay into two photons presented by Gastmans et al.. The reasons for which this result cannot be the correct one have been discussed in some recent papers. We address here the general issue of the indeterminacy of integrals with four-dimensional gauge-breaking regulators and to which extent it might eventually be solved by imposing physical constraints. Imposing gauge invariance as the last step upon R_xi gauge calculations with four-dimensional gauge-breaking regulators, allows indeed to recover the well known H -> gamma gamma result. However we show that in the particular case of the unitary gauge, the indeterminacy cannot be tackled in this same way. The combination of unitary gauge with a cutoff regularization scheme turns out to be non-predictive.
description: 17 pages, 6 figures
Carrier-envelope phase dependence in single-cycle laser pulse propagation with the inclusion of counter-rotating terms
Creators: name: Cui, Ni
name: Macovei, Mihai A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We focus on the propagation properties of a single-cycle laser pulse through a two-level medium by numerically solving the full-wave Maxwell-Bloch equations. The counter-rotating terms in the spontaneous emission damping are included such that the equations of motion are slightly different from the conventional Bloch equations. The counter-rotating terms can considerably suppress the broadening of the pulse envelope and the decrease of the group velocity rooted from dispersion. Furthermore, for incident single-cycle pulses with envelope area 4$π$, the time-delay of the generated soliton pulse from the main pulse depends crucially on the carrier-envelope phase of the incident pulse. This can be utilized to determine the carrier-envelope phase of the single-cycle laser pulse.
description: 6 pages, 5 figures
Exotic dense matter states pumped by relativistic laser plasma in the radiation dominant regime
Creators: name: Colgan, J.
name: Abdallah,, J.
name: Faenov, A. Ya.
name: Pikuz, S. A.
name: Wagenaars, E.
name: Booth, N.
name: Brown, C. R. D.
name: Culfa, O.
name: Dance, R. J.
name: Evans, R. G.
name: Gray, R. J.
name: Hoarty, D. J.
name: Kaempfer, T.
name: Lancaster, K. L.
name: McKenna, P.
name: Rossall, A. L.
name: Skobelev, I. Yu.
name: Schulze, K. S.
name: Uschmann, I.
name: Zhidkov, A. G.
name: Woolsey, N. C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The properties of high energy density plasma are under increasing scrutiny in recent years due to their importance to our understanding of stellar interiors, the cores of giant planets$^{1}$, and the properties of hot plasma in inertial confinement fusion devices$^2$. When matter is heated by X-rays, electrons in the inner shells are ionized before the valence electrons. Ionization from the inside out creates atoms or ions with empty internal electron shells, which are known as hollow atoms (or ions)$^{3,4,5}$. Recent advances in free-electron laser (FEL) technology$^{6,7,8,9}$ have made possible the creation of condensed matter consisting predominantly of hollow atoms. In this Letter, we demonstrate that such exotic states of matter, which are very far from equilibrium, can also be formed by more conventional optical laser technology when the laser intensity approaches the radiation dominant regime$^{10}$. Such photon-dominated systems are relevant to studies of photoionized plasmas found in active galactic nuclei and X-ray binaries$^{11}$. Our results promote laser-produced plasma as a unique ultra-bright x-ray source for future studies of matter in extreme conditions as well as for radiography of biological systems and for material science studies$^{12,13,14,15}$.
title: Kognitive Automation für Radar- Anwendungen
Creators: name: Brüggenwirth, Stefan
name: Müller, Tobias
name: Marquardt, Pascal
Publisher: name: DuEPublico: Duisburg-Essen Publications Online, University of Duisburg-Essen, Germany
Year: 2017
Subjects: Adaptive lters
Cognitive systems
Closed-loop controllers
Robotics
Signal processing
System architectures

description: In diesem Artikel wird eine kognitive Radararchitektur basierend auf dem

Drei-Ebenen-Modell nach Rasmussen vorgestellt. Die fertigkeitsbasierte Verarbeitungsebene

zeichnet sich durch adaptive Signalverarbeitungsverfahren und zielangepasste Wellenformen

aus. Die regelbasierte Verarbeitungsebene umfasst die reaktive Ausführung von optimalen

Handlungssequenzen sowie Ressourcenmanagement. Die wissensbasierte Verarbeitungsebene

ermöglicht langfristige, zielbasierte Missions- und Trajektorienplanung der Sensorplattform. Für

die einzelnen Ebenen werden verschiedene Algorithmen und Lösungsverfahren in konkreten

Anwendungsbeispielen erläutert.
Quantum interface between an electrical circuit and a single atom
Creators: name: Kielpinski, D.
name: Kafri, D.
name: Woolley, M. J.
name: Milburn, G. J.
name: Taylor, J. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We show how to bridge the divide between atomic systems and electronic devices by engineering a coupling between the motion of a single ion and the quantized electric field of a resonant circuit. Our method can be used to couple the internal state of an ion to the quantized circuit with the same speed as the internal-state coupling between two ions. All the well-known quantum information protocols linking ion internal and motional states can be converted to protocols between circuit photons and ion internal states. Our results enable quantum interfaces between solid state qubits, atomic qubits, and light, and lay the groundwork for a direct quantum connection between electrical and atomic metrology standards.
description: Supplemental material available on request
Robust Noise Suppression and Quantum Sensing by Continuous Phased Dynamical Decoupling
Creators: name: Louzon, Daniel
name: Genov, Genko T.
name: Staudenmaier, Nicolas
name: Frank, Florian
name: Lang, Johannes
name: Markham, Matthew L.
name: Retzker, Alex
name: Jelezko, Fedor
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose and demonstrate experimentally continuous phased dynamical decoupling (CPDD), where we apply a continuous field with discrete phase changes for quantum sensing and robust compensation of environmental and amplitude noise. CPDD does not use short pulses, making it particularly suitable for experiments with limited driving power or nuclear magnetic resonance at high magnetic fields. It requires control of the timing of the phase changes, offering much greater precision than the Rabi frequency control needed in standard continuous sensing schemes. We successfully apply our method to nanoscale nuclear magnetic resonance and combine it with quantum heterodyne detection, achieving microhertz uncertainty in the estimated signal frequency for a 120 s measurement. Our Letter expands significantly the applicability of dynamical decoupling and opens the door for a wide range of experiments, e.g., in nitrogen-vacancy centers, trapped ions, or trapped atoms.
description: The main text includes 4 figures, 6 pages. The supplemental material includes 6 more figures and provides more details on the theory, numerical simulation, as well as additional experimental results
Bound entangled states are useful in prepare-and-measure scenarios
Creators: name: Carceller, Carles Roch I
name: Tavakoli, Armin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that bipartite bound entangled states make possible violations of correlation inequalities in the prepare-and-measure scenario. These inequalities are satisfied by all classical models as well as by all quantum models that do not feature entanglement. In contrast to the known Bell inequality violations from bound entangled states, we find that the violations in the prepare-and-measure scenario are sizeable and significantly noise-tolerant. Furthermore, we show that significantly stronger quantum correlations are made possible by considering bound entanglement with a larger dimension.
Framework for solvation in quantum Monte Carlo
Creators: name: Schwarz, Kathleen A.
name: Sundararaman, Ravishankar
name: Letchworth-Weaver, Kendra
name: Arias, Tomás A.
name: Hennig, Richard G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Employing a classical density-functional description of liquid environments, we introduce a rigorous method for the diffusion quantum Monte Carlo calculation of free energies and thermodynamic averages of solvated systems that requires neither thermodynamic sampling nor explicit solvent electrons. We find that this method yields promising results and small convergence errors for a set of test molecules. It is implemented readily and is applicable to a range of challenges in condensed matter, including the study of transition states of molecular and surface reactions in liquid environments.
description: 5 pages, 3 figures, accepted for publication in Physical Review B Rapid Communications
Parallel implementation of Multilevel BDDC
Creators: name: Šístek, Jakub
name: Mandel, Jan
name: Sousedík, Bedřich
name: Burda, Pavel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: G.1.3
subject: 65N55, 65F08, 65Y05

description: In application of the Balancing Domain Decomposition by Constraints (BDDC) to a case with many substructures, solving the coarse problem exactly becomes the bottleneck which spoils scalability of the solver. However, it is straightforward for BDDC to substitute the exact solution of the coarse problem by another step of BDDC method with subdomains playing the role of elements. In this way, the algorithm of three-level BDDC method is obtained. If this approach is applied recursively, multilevel BDDC method is derived. We present a detailed description of a recently developed parallel implementation of this algorithm. The implementation is applied to an engineering problem of linear elasticity and a benchmark problem of Stokes flow in a cavity. Results by the multilevel approach are compared to those by the standard (two-level) BDDC method.
description: 9 pages, 2 figures, 3 tables
Point Games in Quantum Weak Coin Flipping Protocols
Creators: name: Pelchat, Edouard
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Computer Science
subject: Quantum cryptography
subject: Secure Two-Party Computation
subject: coin flipping
subject: weak
subject: small bias
subject: point games
subject: binomials
subject: Kitaev's formalism

description: Two parties, wishing to establish a shared random bit at a distance, must solve a problem known as coin flipping. Classical two-party secure computations such as coin flipping are impossible in the information theoretic setting. However quantum information allows for the possibility of unconditional security. Mochon defines a model of secure two-party computations, point games, to show the existence of optimal quantum weak coin flipping protocols in [29]. His ground-breaking result is widely accepted, but its proof is very complicated, has never been validated, and remains poorly understood despite the efforts of several researchers [12,25,35]. In this thesis we use analytical and mathematical methods to study point games. We discover several new primitives, and construct new building blocks to define a new family of point games. We present a new truncation technique that is simpler, more efficient, is more intuitive, and achieves better results than the best previously known. We provide concrete examples of these point games. We analyze Mochon's optimal point games, and we identify the key elements of their construction that are not specified. We also provide a new recursion technique that achieves better results than the one proposed by Mochon. Furthermore, we construct simple and elegant point games using binomial coefficients. Our point games are simpler than Mochon's, since his point games are constructed using techniques in mathematical analysis. Studying point games with new techniques may lead to a simpler formalism of two-party secure computations, and to more efficient protocols.
Outdoor recreation conflict on trails in Squamish, British Columbia : an examination of theoretical models and management.
Creators: name: Ramon Hidalgo, Ana Elia
Publisher: name: University of British Columbia
Year: 2010

description: Understanding the social interactions of trail users is a challenge for recreation managers globally. Recreationists are not homogenous and differences in their expectations, behaviours and values may create conflict and consequently, recreationists´ levels of satisfaction may be decreased. On the one hand, numerous management practices have been suggested to deal with recreation conflict; of these, zoning and educational programs are two of the most commonly cited to address interpersonal and social values conflict respectively. However, the efficacy of these two approaches is still in doubt. Additionally, although past research found that many different attributes of recreationists are associated with conflict, no agreement has been reached on how to measure this conflict or even where the conflict comes from. On the other hand, several potential sources of conflict have been identified in literature, though they have not yet been included within the conflict models. Some authors have suggested that the underlying causes of conflict should first be identified in order for conflict management to be effective. This research is a survey-based, cross-sectional case study of trail users on nine areas of the Squamish trail network in British Columbia in which I 1) identify potential sources of conflicts among recreationists; 2) look for possible causal relationships between sources of conflict and the degrees of both the trail user´s activity style and resource specificity; and 3) asses the efficacy of two management practices (i.e., spatial zoning and educational signs) at reducing interpersonal and social values conflict respectively. Results indicate that spatial zoning and educational signs are useful at reducing interpersonal conflict and social values conflict, but only with regard to specific sources of conflict and at low effect sizes. Results also suggest that very different characteristics of recreationists significantly predict several sources of conflict. By investigating several characteristics of recreationists as well as their sensitivity to sources of conflict, this research has demonstrated that recreation conflict can be explained by different recreationist attributes, depending on the source of conflict under examination. The findings in this study lay the foundation for expanding further the existing conflict models in years to come.
Regulation of Oligodendrocyte differentiation through Neuroligin-Neurexin signalling
Creators: name: Scott, Lucas O.M.
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Neuroscience
subject: Neuroligin
subject: Oligodendrocyte
subject: Myelination

description: The neuroligin (NL) gene family has been well characterized in neurons by virtue of its role as a synaptic cell adhesion molecule, and because mutations in the gene have been associated with Autism Spectrum Disorder (ASD). However much less is known about its role in the glial cell population, where one of the subtypes, neuroligin 3, is expressed. The work presented here investigates NL’s role in oligodendrocytes (OLs), a subtype of glial cells responsible for the myelination in the central nervous system. This was accomplished by first determining NL’s presence in this cell type in hippocampal dissociated cultures by immunocytochemistry and in situ hybridization. It was found that by interfering with the interaction of NL and its pre-synaptic partner neurexin (NX), the developmental profile of OL cells was delayed. Conversely, enhancing the interaction accelerated the developmental profile. Evidence is also presented that glutamate receptors are potentially spatially localized to the contact points between oligodendrocytes and axons in response to the interaction between NL and NX. As mutations in NL have been linked to autism, this provides a new potential mechanism by which the cognitive deficits observed could occur.
RURAL REVITALIZATION THROUGH TIBETAN TRADITIONAL SPORTS HERITAGE
Creators: name: Wei, Zhang
Publisher: name: SADI journals
Year: 2023
Subjects: intangible cultural heritage
fine traditional culture
Chinese Dream
cultural confidence
modern socialist country.

description: The intangible cultural heritage, deeply rooted in history and tradition, holds a significant place within the rich tapestry of Chinese culture. In the wake of the 18th National Congress of the Communist Party of China, there has been a growing recognition of the contemporary relevance and value of China's enduring cultural heritage. This cultural legacy serves as a powerful source of inspiration and guidance as China embarks on a new era of building a modern socialist nation and pursuing the Chinese Dream. The preservation and promotion of China's fine traditional culture have taken on renewed importance, not only as a means of cultivating cultural confidence but also as a vehicle for enhancing China's global cultural presence. As the nation strives to achieve its second centennial goal, the role of fine traditional culture in fostering unity, identity, and progress cannot be overstated. This article explores the enduring significance of China's intangible cultural heritage in the context of contemporary socio-political and cultural developments. It delves into the ways in which this heritage serves as a source of cultural pride, national identity, and global engagement, contributing to the broader goal of fully realizing a modern socialist China
Phase behaviour and dynamics in primitive models of molecular ionic liquids
Creators: name: Ganzenmüller, G. C.
name: Camp, P. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The phase behaviour and dynamics of molecular ionic liquids are studied using primitive models and extensive computer simulations. The models account for size disparity between cation and anion, charge location on the cation, and cation-shape anisotropy, which are all prominent features of important materials such as room-temperature ionic liquids. The vapour-liquid phase diagrams are determined using high-precision Monte Carlo simulations, setting the scene for in-depth studies of ion dynamics in the liquid state. Molecular dynamics simulations are used to explore the structure, single-particle translational and rotational autocorrelation functions, cation orientational autocorrelations, self diffusion, viscosity, and frequency-dependent conductivity. The results reveal some of the molecular-scale mechanisms for charge transport, involving molecular translation, rotation, and association.
description: 15 pages, 7 figures
A Reduction Method for Higher Order Variational Equations of Hamiltonian Systems
Creators: name: Aparicio, Ainhoa
name: Weil, Jacques-Arthur
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: Symbolic Computation (cs.SC)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 34M03, 34M15, 34M25, 34Mxx, 20Gxx, 17B45, 17B80, 34A05, 34A26, 34A99

description: Let $\mathbf{k}$ be a differential field and let $[A]\,:\,Y'=A\,Y$ be a linear differential system where $A\in\mathrm{Mat}(n\,,\,\mathbf{k})$. We say that $A$ is in a reduced form if $A\in\mathfrak{g}(\bar{\mathbf{k}})$ where $\mathfrak{g}$ is the Lie algebra of $[A]$ and $\bar{\mathbf{k}}$ denotes the algebraic closure of $\mathbf{k}$. We owe the existence of such reduced forms to a result due to Kolchin and Kovacic \cite{Ko71a}. This paper is devoted to the study of reduced forms, of (higher order) variational equations along a particular solution of a complex analytical hamiltonian system $X$. Using a previous result \cite{ApWea}, we will assume that the first order variational equation has an abelian Lie algebra so that, at first order, there are no Galoisian obstructions to Liouville integrability. We give a strategy to (partially) reduce the variational equations at order $m+1$ if the variational equations at order $m$ are already in a reduced form and their Lie algebra is abelian. Our procedure stops when we meet obstructions to the meromorphic integrability of $X$. We make strong use both of the lower block triangular structure of the variational equations and of the notion of associated Lie algebra of a linear differential system (based on the works of Wei and Norman in \cite{WeNo63a}). Obstructions to integrability appear when at some step we obtain a non-trivial commutator between a diagonal element and a nilpotent (subdiagonal) element of the associated Lie algebra. We use our method coupled with a reasoning on polylogarithms to give a new and systematic proof of the non-integrability of the Hénon-Heiles system. We conjecture that our method is not only a partial reduction procedure but a complete reduction algorithm. In the context of complex Hamiltonian systems, this would mean that our method would be an effective version of the Morales-Ramis-Simó theorem.
description: 15 pages
Notolopas brasiliensis Miers 1886
Creators: name: Almeida, Alexandre Oliveira De
name: Guerrazzi, Maria Cec Lia
name: Coelho, Petr Ȏ Nio Alves
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Epialtidae
Notolopas
Notolopas brasiliensis

description: Notolopas brasiliensis Miers, 1886
Material examined (N=27). 2f, 13/IX/2003, St. 0 5 (MZUESC #682).
Distribution. Western Atlantic – Colombia, Venezuela, and Brazil (from Amapá to São Paulo) (Melo 1996).
Ecological notes. On sand and calcareous algae bottoms, occasionally in sand and broken shells. Shallow waters to 30 m (Melo 1996).
Previous records in Bahia. Miers (1886), Moreira (1901), Barreto et al. (1993), Almeida et al. (2007).
description: Published as part of Almeida, Alexandre Oliveira De, Guerrazzi, Maria Cec Lia & Coelho, Petr Ȏ Nio Alves, 2007, Stomatopod and decapod crustaceans from Camamu Bay, state of Bahia, Brazil, pp. 1-45 in Zootaxa 1553 on page 29, DOI: 10.5281/zenodo.178168
Local-to-global principles for rotor walk
Creators: name: Giacaglia, Giuliano Pezzolo
name: Levine, Lionel
name: Propp, James
name: Zayas-Palmer, Linda
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C25, 05C38, 05C81, 90B10

description: In rotor walk on a finite directed graph, the exits from each vertex follow a prescribed periodic sequence. Here we consider the case of rotor walk where a particle starts from a designated source vertex and continues until it hits a designated target set, at which point the walk is restarted from the source. We show that the sequence of successively hit targets, which is easily seen to be eventually periodic, is in fact periodic. We show moreover that reversing the periodic patterns of all rotor sequences causes the periodic pattern of the hitting sequence to be reversed as well. The proofs involve a new notion of equivalence of rotor configurations, and an extension of rotor walk incorporating time-reversed particles.
description: 25 pages, 2 figures
Polycarpa tokiokai Monniot & Monniot 1996
Creators: name: Monniot, Françoise
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Ascidiacea
Stolidobranchia
Styelidae
Polycarpa
Polycarpa tokiokai

description: Polycarpa tokiokai Monniot & Monniot, 1996 (Figure 24) Polycarpa tokiokai Monniot F. & Monniot C., 1996:255 Fig. 55, pl. 9G and synonymy; 2001: 355; 2008: 858 Fig.79E. Material. Coll. Coral Reef research Foundation, Palau, Southwest Isl., Helen Reef (Hotsarihi), 02°48.88’N – 131°46.75’E, 10m, 22/VIII/2008, 0CDN 9871-O bis (MNHN S1 POL. B 555). A single specimen 3cm in length was attached to Polycarpa mytiligera. The thick tunic is brown. The body wall is thin without black pigment cells. Sixteen large oral tentacles alternate with smaller ones. The neural tubercle opens in a S and is located in a deep V of the peripharyngeal band. The 4 branchial folds do not overlap each other. The formula on the right side is: E-5- 12 -5- 15 -5- 15 -4- 17 -DL. It is difficult to exactly determine the fold limits. The stigmata are short without parastigmatic vessels. The long dorsal lamina increases in height towards the oesophagus. The gut occupies the posterior left part of the body with a grooved stomach, the intestine curved in a well marked secondary loop and a smooth rimed anus. A large endocarp lies in the primary intestinal loop (Fig. 24). The body wall is devoid of other endocarps. Numerous polycarps (Fig. 24) are grouped in irregular bunches protruding into the peribranchial cavity; they are located on each side of large dermato-branchial strands. Oval in shape, they are attached to the body wall by the tip opposed to the gonoducts. Each polycarp contains an elongate ovary sided by 2 rows of male follicles. Numerous thin papillae link the cloacal velum. Polycarpa tokiokai is frequent in the tropical Pacific.
description: Published as part of Monniot, Françoise, 2010, Some new data on tropical western Pacific Ascidians, pp. 1-29 in Zootaxa 2561 (1) on page 23, DOI: 10.11646/zootaxa.2561.1.1, http://zenodo.org/record/5304193
description: {"references": ["Monniot, F. & Monniot, C. (1996) New collections of ascidians from the Western Pacific and Southeastern Asia. Micronesica 29 (2), 133 - 279."]}
Deciphering multi-state mobility within single particle trajectories of proteins on the plasma membrane
Creators: name: Morrison, Jennifer S.
Publisher: name: University of British Columbia
Year: 2010

description: Single particle tracking is a powerful technique often used in the study of dynamic mechanisms on the cell surface such as binding, confinement and trafficking. Experimental trajectories can be used to detect changes in the lateral mobility of individual molecules over time and space. Therefore, a potential problem in the analysis of single particle trajectories is to account for transitions between modes of mobility. Here we present two coupled statistical methods which characterize particle mobility that is temporally and spatially heterogeneous. The first method detects periods of drift diffusion or reduced mobility within single trajectories due to transient associations with other biomolecules. The second locates spatial domains which have higher or lower concentrations of these associating molecules. The trajectory is modeled as the outcome of a two-state Hidden Markov model parameterized by the diffusion coefficients and drift velocities of each state and the rates of transitions between them (which may change in space). Transitions between states arise from association and disassociation with a binding partner, either membrane-associated or cytosolic. These associations lead to either reduced Brownian diffusion or drift diffusion. An adapted Markov chain Monte Carlo algorithm was used to optimize parameters and simultaneously select the most favorable model of lateral mobility (transient reduced mobility or transient drift diffusion) and to locate spatial domains. Analysis of simulated particle tracks with a wide range of parameters successfully distinguished between the two models, gave accurate estimates for parameters and accurately located spatial domains.
Shame, Embodiment, and Empathy: The Ethics of Affect
Creators: name: Ruddy, Philippa
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Literature--English
subject: affect theory
subject: Charles Darwin
subject: Oscar Wilde
subject: Sigmund Freud
subject: Claudia Rankine

description: What new insights might we gain if we consider shame from the perspective of psychosocial evolution? I argue that Charles Darwin’s observations in The Expression of the Emotions in Man and Animals (1872) suggest that shame incites self-consciousness about how we appear to others. Awareness of others’ perspectives is essential for empathic thought; therefore, shame is both self- and other-oriented. Subsequently, I reveal the accordance between Darwin’s and Oscar Wilde’s interpretations of shame as a relational emotion through The Picture of Dorian Gray (1890 & 1891). Next, I use Sigmund Freud’s Civilization and Its Discontents (1930) to distinguish guilt from shame, both physiologically and cognitively. Freud’s work, along with contemporary neuroscience, informs questions raised by Darwin’s research. Finally, I consider the ethics of bodies in relation to one another through Claudia Rankine’s Citizen (2014). Rankine’s work provokes and performs self-conscious thinking and empathy, which are processes analogous to shame.
title: Short-Term Effect of Preventative Oral Health Services on Drug Rehabilitation Clients' Self Concept
Creators: name: Jones, Susan Elizabeth
Publisher: name: Old Dominion University Libraries
Year: 1980

description: The purpose of this study was to determine if a statistically significant difference existed in self concept prior to and following preventive oral health services in clients undergoing drug rehabilitation. Individuals residing at the Drug Dependency Treatment Program Unit at McGuire Veterans Administration Hospital in Richmond, Virginia, comprised the control and experimental groups.

Data were organized according to a randomized groups, pretest-posttest design with preventive oral health services as the active independent variable. The dependent variables, Total Positive Score, Self Satisfaction Score, and Physical Self Score were measured by the Tennessee Self Concept Scale.

One grouping factor, one trial factor analysis of variance yielded no statistically significant difference between the self concept of drug rehabilitation clients who received preventive oral health services and those who did not receive such services. All comparisons were at the 0.05 level of significance.
Kiselev-inspired Wormholes
Creators: name: Yuennan, Jureeporn
name: Panyasiripan, Piyachat
name: Channuie, Phongpichit
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this study, we investigate traversable wormholes inspired by the Kiselev framework, which extends classical black hole solutions by incorporating anisotropic fluids. These exotic fluids play a crucial role in cosmology, particularly in explaining phenomena such as the accelerated expansion of the universe. We generalize the Kiselev framework to static, spherically symmetric traversable wormholes and analyze their properties under two distinct models of the redshift function: a constant redshift function and one that varies inversely with the radial coordinate. We examine the energy conditions-specifically the Null Energy Condition (NEC), Weak Energy Condition (WEC), and Strong Energy Condition (SEC)-for these models, demonstrating that only certain exotic fluids can sustain the wormhole structure. Furthermore, we quantify the amount of exotic matter required to maintain these wormholes using the volume integral quantifier and compare our results with other wormhole models. Additionally, we compute the effective potential for photons in Kiselev-inspired wormholes under both redshift function models and analyze their implications for weak gravitational lensing. Our findings suggest that Kiselev-inspired wormholes could serve as viable candidates for exotic geometries, potentially paving the way for future observational verification.
description: v3: 20 pages, many figures, version accepted for publication by Nuclear Physics B
Three Essays on Oil Industry and Public Policy
Creators: name: Fu, Sisi
Publisher: name: Graduate Studies
Year: 2017
Subjects: Economics

description: This thesis provides both empirical and theoretical evidence on the effects of public policies on the oil industry. In Chapter 1, I examine the impacts of prorationing and compulsory unitization to solve the common pool problem; in Chapter 2, I provide empirical evidence of the relationship between taxation and producers' extraction paths under a new horizontal drilling technology; in Chapter 3, I build a theory model which analyzes a specific royalty-exemption program. In Chapter 1, I use a difference-in-difference methodology to examine the effects of prorationing and compulsory unitization on the U.S.oil production. The empirical result indicates that both unitization and prorationing increased the well-head price. In addition, unitization restricted the production, but prorationing raised the production. Unitization also mitigated the congestion of producing wells, while prorationing encouraged producers to operate more producing wells than necessary. However, the effectiveness of solving the common pool problem was still limited for both policies, because neither of them could sustain the value of well production. In Chapter 2, I probe the impacts of taxation on oil extraction paths from horizontal wells. I use a fixed effect method to study the horizontal well incentive program in Manitoba. The empirical results suggest that producers tilt their extraction paths downward before they start to pay the tax. There is also a reduction in oil production after producers pay the tax. In Chapter 3, I use an optimal control model to illustrate how a royalty-exemption program will affect the oil extraction path over time. The royalty-exemption program is defined as a program that grants oil producers an upfront royalty-free volume at the beginning of their production, they pay the royalty after this volume is used up. I find that because the royalty payment is foreseen in the future, producers start to adjust their production at the royalty-free period. When the royalty is in effect, it can either induce producers to produce at a lower rate and extend the well life, or encourage them to extract more and shorten the well's production life, depending on when producers start to pay the royalty.
Semi-relativistic effects in spin-1/2 quantum plasmas
Creators: name: Asenjo, F. A.
name: Zamanian, J.
name: Marklund, M.
name: Brodin, G.
name: Johansson, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Emerging possibilities for creating and studying novel plasma regimes, e.g. relativistic plasmas and dense systems, in a controlled laboratory environment also requires new modeling tools for such systems. This brings motivation for theoretical studies of the kinetic theory governing the dynamics of plasmas for which both relativistic and quantum effects occur simultaneously. Here, we investigate relativistic corrections to the Pauli Hamiltonian in the context of a scalar kinetic theory for spin-1/2 quantum plasmas. In particular, we formulate a quantum kinetic theory that takes such effects as spin-orbit coupling and Zitterbewegung into account for the collective motion of electrons. We discuss the implications and possible applications of our findings.
description: 9 pages, 2 figures
Behaviour of entanglement and Cooper pairs under relativistic boosts
Creators: name: Palge, Veiko
name: Vedral, Vlatko
name: Dunningham, Jacob A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent work has shown how single-particle entangled states are transformed when boosted in relativistic frames for certain restricted geometries. Here we extend that work to consider completely general inertial boosts. We then apply our single particle results to multiparticle entanglements by focussing on Cooper pairs of electrons. We show that a standard Cooper pair state consisting of a spin-singlet acquires spin-triplet components in a relativistically boosted inertial frame, regardless of the geometry. We also show that, if we start with a spin-triplet pair, two out of the three triplet states acquire a singlet component, the size of which depends on the geometry. This transformation between the different singlet and triplet superconducting pairs may lead to a better understanding of unconventional superconductivity.
description: 5 pages, 2 figures
Microcosmus exasperatus Heller 1878
Creators: name: Monniot, Françoise
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Ascidiacea
Stolidobranchia
Pyuridae
Microcosmus
Microcosmus exasperatus

description: Microcosmus exasperatus Heller, 1878 (Figures 20D, 25B, 27) Microcosmus exasperatus Heller, 1878:17. Cole & Vorontsova:1998: 1 Fig.2, Viet Nam. Rocha, Moreno, Metri: 2005: 470, with synonymy and distribution. Material. Coll. N.J. Pilcher et al., Viet Nam, Con Dao Isl., Con Son isl., Da Trang, 08°39.43’N – 106°36.37’E, 5m, 23/VII/2008, 0PHG 1603 bis (MNHN S2 MIC 193) . A single specimen (Fig. 20D), 35mm long, with a red tunic covered with epibionts was attached to Polycarpa argentata. The branchial sac (Fig. 27A) has 9 folds on the right side and 8 on the left side. The branchial formula on the right is: E-1- 14 - 2- 18 -3- 17 -4- 18 -4- 22 -5- 22 -3- 24 -3- 21 -3- 14 -2-DL. The digestive loop occupies a large part of the left body side. The left gonad crosses the intestine. The right gonad has 3 lobes (Fig 27B.). The siphonal spinules have a wide base narrowing to a sharp point and small denticles on the sides (Fig. 25B)). Microcosmus exasperatus is a widely distributed fouling species recorded warm waters in all oceans, and undoubtedly introduced in many localities. It was already known from Viet Nam.
description: Published as part of Monniot, Françoise, 2010, Some new data on tropical western Pacific Ascidians, pp. 1-29 in Zootaxa 2561 (1) on pages 25-27, DOI: 10.11646/zootaxa.2561.1.1, http://zenodo.org/record/5304193
description: {"references": ["Heller, C. (1878) Beitrage zur nahern Kenntnis der Tunicaten. Denkschriften der Kaiserlichen Akademie der Wissenschaften zu Wien, 37 (1), 17."]}