cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Characterizing the role of Rasa1 in vascular development in zebrafish
Creators: name: Davari, Paniz
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Biology--Molecular
subject: Vascular development

description: Vascular malformation syndromes arise during embryonic development and can have devastating effects on the quality of life of patients. Capillary malformations present with the overgrowth and permanent dilation of the capillaries under the skin but are often accompanied by fast-flow arteriovenous malformations in other internal organs. Recently, mutations in the GTPase activating protein RASA1 were found to be one cause of capillary malformation- arteriovenous malformation (CM-AVM). I set out to model CM-AVM in the zebrafish and found that loss of rasa1 leads to a large arteriovenous malformation that connects the artery and vein without intervening capillaries. In wild-type zebrafish embryos, a distinct aorta and a caudal vein plexus are visible in the tail region. However, in rasa1a morphants, there is an enlarged single vessel instead of a plexus, and this vessel fails to develop sprouts. Arteriovenous shunts develop commonly in this region. I next examined the mechanism by which rasa1 functions. I found that rasa1a genetically interacts with rras but not farnesyl- modified ras (rat sarcoma) genes. rasa1a also functions in parallel pathway to rras2. Finally, I showed misregulation of vegfc (vascular growth factor c) and vegfr3 (vascular growth factor receptor 3) in rasa1a morphants, suggesting rasa1a loss leads to misregulation of venous signaling pathways.
Methods for Solving Modern, Scale-Borne Problems in VLSI Physical Design
Creators: name: Rakai, Logan
Publisher: name: Graduate Studies
Year: 2012
Subjects: subject: Engineering--Electronics and Electrical
subject: Computer-aided design
subject: Parallel algorithms
subject: Robust Optimization
subject: Clustering

description: The design automation community is confronted with new challenges every technology node. Many of the challenges are borne out of issues relating to scale, be it the very small or the very large. For example, the extremely large scale of the number of instances in modern designs creates challenges in effectively exploring vast solution spaces in reasonable amounts of time. At the other end of the scale spectrum, the extremely small scale of features created by modern lithography processes are highly susceptible to process variations which affect performance and yield. This thesis deals with the development of methods for solving scale-borne problems in the physical design of integrated circuits. This thesis addresses challenges faced in two important phases of physical design: placement and clock network synthesis. The importance of these two phases is reflected in the fact that they have been the subject of five out of the last seven ACM/IEEE International Symposium on Physical Design (ISPD) contests. The number of instances and the size of the solution space in performing placement are truly immense. A proven linear-time clustering algorithm is proposed to deal with the explosion of problem sizes being encountered. Several extensions to the algorithm are proposed to further improve the quality of results. The number of instances in clock network design is also growing at a rapid pace. In order to cope with this challenge, a generic framework to parallelize algorithms that perform the main stages of clock network synthesis is proposed. Theorems are provided to prove asymptotically optimal speedup when the framework is applied to several classes of algorithms. Another challenge addressed regarding clock network synthesis is that of variation. A method is proposed for handling variations in lengths and widths of buffers and interconnects, that arise from the manufacturing process.
Quaternion-based non-singular terminal sliding mode control for a satellite-mounted space manipulator
Creators: name: Giordano, Jacopo
name: Cenedese, Angelo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, a robust control solution for a satellite equipped with a robotic manipulator is presented. First, the dynamic model of the system is derived based on quaternions to describe the evolution of the attitude of the base satellite. Then, a non-singular terminal sliding mode controller that employs quaternions for attitude control, is proposed for concurrently handling all the degrees of freedom of the space manipulator. Moreover, an additional adaptive term is embedded in the controller to estimate the upper bounds of disturbances and uncertainties. The result is a resilient solution able to withstand unmodelled dynamics and interactions. Lyapunov theory is used to prove the stability of the controller and numerical simulations allow assessing performance and fuel efficiency.
description: New figures and some text clarifications
title: Harcèlement scolaire et cyberharcèlement
title: Intervenons avant qu'il ne soit trop tard !
titleType: Subtitle
title: Harcèlement scolaire et cyberharcèlement
titleType: AlternativeTitle
Creators: name: Buchs, Elodie
name: Mateos, Wanda
Publisher: name: Unknown
Year: 0
Subjects: subject: Harcèlement scolaire
subject: Cyberharcèlement
subject: Infirmière scolaire

description: La thématique du harcèlement scolaire et du cyberharcèlement est de plus en plus médiatisée. En effet, ces phénomènes prennent énormément d’ampleur chez les jeunes d’aujourd’hui avec des impacts qui peuvent s’avérer très négatifs sur la santé des enfants et des adolescents. Les parents des victimes peuvent parfois se sentir démunis face à ce type de situations. Dans ce travail, nous abordons le rôle de l’infirmière scolaire lors de situations de harcèlement et de cyberharcèlement avérées. Nous avons examiné les interventions infirmières possibles afin de prévenir les complications de l’état de santé en lien avec ces situations.
Energy-based Detection of Adverse Weather Effects in LiDAR Data
Creators: name: Piroli, Aldi
name: Dallabetta, Vinzenz
name: Kopp, Johannes
name: Walessa, Marc
name: Meissner, Daniel
name: Dietmayer, Klaus
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Autonomous vehicles rely on LiDAR sensors to perceive the environment. Adverse weather conditions like rain, snow, and fog negatively affect these sensors, reducing their reliability by introducing unwanted noise in the measurements. In this work, we tackle this problem by proposing a novel approach for detecting adverse weather effects in LiDAR data. We reformulate this problem as an outlier detection task and use an energy-based framework to detect outliers in point clouds. More specifically, our method learns to associate low energy scores with inlier points and high energy scores with outliers allowing for robust detection of adverse weather effects. In extensive experiments, we show that our method performs better in adverse weather detection and has higher robustness to unseen weather effects than previous state-of-the-art methods. Furthermore, we show how our method can be used to perform simultaneous outlier detection and semantic segmentation. Finally, to help expand the research field of LiDAR perception in adverse weather, we release the SemanticSpray dataset, which contains labeled vehicle spray data in highway-like scenarios. The dataset is available at https://semantic-spray-dataset.github.io .
description: Accepted for publication in IEEE Robotics and Automation Letters (RA-L)
Cytosine-guanosine deoxynucleotides (CpG DNA)-mediated Antiviral Response Against Avian Influenza Virus Infection
Creators: name: Mohamed Abdul Cader, Mohamed Sarjoon
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Immunology
subject: FOS: Clinical medicine
subject: In ovo, avian influenza virus, CpG DNA, nitric oxide, TLR21

description: Cytosine-guanosine deoxynucleotides (CpG DNA) can be used for the stimulation of toll-like receptor (TLR)21 signaling pathway in avian species, that ultimately leads to upregulation of gene transcription for pro-inflammatory molecules including nitric oxide (NO) and recruitment of innate immune cells. These innate immune mediators, play various roles in the innate immune system against viruses that infect mammals and avian species. The objective of the study was to determine the antiviral effect of NO, produced in response to in ovo delivery of CpG DNA, against H4N6 low pathogenic avian influenza virus (LPAIV) infection in the avian respiratory system. First, we observed that when CpG DNA is delivered at embryo day (ED)18 in ovo and subsequently challenged with H4N6 LPAIV at ED19 pre-hatch and day 1 post-hatch, CpG DNA reduces H4N6 LPAIV replication in the respiratory tract. Second, we observed that CpG DNA-mediated H4N6 LPAIV inhibition was attributable to NO production. Third, we observed that the antiviral response elicited by in ovo CpG DNA delivery is also associated with macrophage recruitment in the lungs. Finally, we showed that NO originated from macrophages is capable of eliciting antiviral response against H4N6 LPAIV infection in a dose-dependent manner. Altogether, CpG DNA-mediated antiviral response against H4N6 LPAIV infection is attributable to increased macrophage numbers in the lungs and elevated NO production originated from macrophages. The study provides insights into the mechanisms of CpG DNA-mediated antiviral response, particularly against H4N6 LPAIV infection in avian species.
title: Symptomatologie et expression de la dépression chez le peuple Santal
title: une approche psychiatrique transculturelle
titleType: Subtitle
title: Symptomatologie et expression de la dépression chez le peuple Santal
titleType: AlternativeTitle
Creators: name: Braun, Julia
Publisher: name: Unknown
Year: 0
Subjects: subject: Dépression
subject: Interculturalité
subject: Santé communautaire

description: La dépression existe-t-elle dans la communauté Santal ? Voici la question à laquelle nous avons essayé de répondre lors de notre travail de recherche en immersion communautaire. Le but primaire de ce projet était de faire participer des étudiants à un travail de recherche, en interdisciplinarité, pour étudier comment des valeurs, des comportements et un environnement social influencent la santé et la maladie. Le projet devant toucher à une problématique liée à la santé communautaire, nous nous sommes intéressés au cas de la dépression.
Workshop “Micropolar continua and beyond”
Creators: name: Müller, Wolfgang H.
name: Eremeyev, Victor A.
Publisher: name: Springer Science and Business Media LLC
Year: 2023
Subjects: subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
subject: generalized continuum model
subject: GTC
subject: materials science
subject: micropolar theory
subject: discrete modeling approach

description: We present a review of the recent workshop “Micropolar Continua and beyond” which held in March 28–31, 2023, at Technische University of Berlin, Germany.
Ser o estar
Creators: name: De La Gándara Martín, Jesús J.
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2023

description: Sección coordinada por el Dr Jesús J. de la Gándara
description: Psicosomàtica y Psiquiatría, Núm. 25 (2023): abril-mayo-junio
Quasi-exact Treatment of the Relativistic Generalized Isotonic Oscillator
Creators: name: Agboola, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the pseudospin symmetry case of a spin-1/2 particle governed by the generalized isotonic oscillator, by presenting quasi exact polynomial solutions to Dirac equation with pseudospin symmetry vector and scalar potentials. The resulting equation is found to be quasi-exactly solvable owing to the existence of a hidden $sl(2)$ algebraic structure. A systematic and closed form solution to the basic equation is obtained using the Bethe ansatz method. Analytic expression for the energy is obtain and the wavefunction is derived in terms of the roots to a set of Bethe ansatz equations.
Comparison of column chromatography and solid-phase extraction on virgin and aged bituminous maltene phases
Creators: name: Schwettmann, Kim
name: Höhne, Philipp
name: Stephan, Dietmar
Publisher: name: Springer Science and Business Media LLC
Year: 2022
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften::690 Hausbau, Bauhandwerk::690 Hausbau, Bauhandwerk
subject: bitumen
subject: SARA fractions
subject: column chromatography
subject: solid-phase extraction
subject: FTIR spectroscopy

description: Bitumen is a complex mixture consisting of different hydrocarbons, which can be categorised into substance classes called SARA (saturates, aromatics, resins and asphaltenes) fractions. The saturates, aromatics and resins are further referred to as maltenes or maltene phase. To determine the SARA fractions the asphaltenes were separated from the maltenes in a first step. A standard method to further separate the maltenes is column chromatography (CC). Since column chromatography is a time-consuming and solvent-intensive process, an alternative method for separating maltenes using solid-phase extraction (SPE) was investigated. A total of nine bitumen samples of the same type in different ageing states but from different manufacturers were separated with both methods to determine the mass percentages of the fractions for investigating their comparability. The results show that both methods led to different mass percentages of the fractions. However, with the SPE, separating smaller amounts of maltenes is possible while saving a large amount of material, costs, and workload. Linear regression analyses between the colloidal indices with conventional and rheological parameters revealed that the fractions obtained from SPE led to higher coefficients of determination of the linear regression model. The obtained fractions were further structurally compared with FTIR spectroscopy, whereby the spectra of the SPE fractions and the CC fractions did not show any significant differences. The overall consideration of the results concludes that the SPE can replace the CC.
Automated verification of countermeasure against detector-control attack in quantum key distribution
Creators: name: Acheva, Polina
name: Zaitsev, Konstantin
name: Zavodilenko, Vladimir
name: Losev, Anton
name: Huang, Anqi
name: Makarov, Vadim
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Attacks that control single-photon detectors in quantum key distribution using tailored bright illumination are capable of eavesdropping the secret key. Here we report an automated testbench that checks the detector's vulnerabilities against these attacks. We illustrate its performance by testing a free-running detector that includes a rudimentary countermeasure measuring an average photocurrent. While our testbench automatically finds the detector to be controllable in a continuous-blinding regime, the countermeasure registers photocurrent significantly exceeding that in a quantum regime, thus revealing the attack. We then perform manually a pulsed blinding attack, which controls the detector intermittently. This attack is missed by the countermeasure in a wide range of blinding pulse durations and powers, still allowing to eavesdrop the key. We make recommendations for improvement of both the testbench and countermeasure.
description: 11 pages, 11 figures. Revised after referee reports from EPJ Quantum Technol
The effect of discrete breathers on heat conduction in nonlinear chains
Creators: name: Xiong, Daxing
name: Wang, Jiao
name: Zhang, Yong
name: Zhao, Hong
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Intensive studies in the past decades have suggested that the heat conductivity $κ$ diverges with the system size $L$ as $κ\sim L^α$ in one dimensional momentum conserving nonlinear lattices and the value of $α$ is universal. But in the Fermi-Pasta-Ulam-$β$ lattices with next-nearest-neighbor interactions we find that $α$ strongly depends on $γ$, the ratio of the next-nearest-neighbor coupling to the nearest-neighbor coupling. We relate the $γ$-dependent heat conduction to the interactions between the long-wavelength phonons and the randomly distributed discrete breathers. Our results provide an evidence to show that the nonlinear excitations affect the heat transport.
description: 4 pages, 5 figures
Non-isospectral Hamiltonians, intertwining operators and hidden hermiticity
Creators: name: Bagarello, Fabio
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have recently proposed a strategy to produce, starting from a given hamiltonian $h_1$ and a certain operator $x$ for which $[h_1,xx^\dagger]=0$ and $x^\dagger x$ is invertible, a second hamiltonian $h_2$ with the same eigenvalues as $h_1$ and whose eigenvectors are related to those of $h_1$ by $x^\dagger$. Here we extend this procedure to build up a second hamiltonian, whose eigenvalues are different from those of $h_1$, and whose eigenvectors are still related as before. This new procedure is also extended to crypto-hermitian hamiltonians.
description: in press in Phys. Lett. A
Board Committee Chair Variance Decomposition Analysis Script
Creators: name: Schepker, Donald
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 350701
subject: Corporate governance

description: This script and related data support the analyses in Kolev, Schepker, Wangrow, and Barker (2023) in the Journal of Management.This script includes all code needed to run variance decomposition analyses for board committee chair effects.
Tealdo da Sestri Levante, un notaio del secolo XIII al servizio del comune di Genova
Creators: name: Calleri, Marta
Publisher: name: Zenodo
Year: 2018
Subjects: Bonifacio
Gavi
Portovenere
13th Century
Notariate
Documentation

description: The article focuses on notary Tealdo da Sestri Levante, and provides a biographical reconstruction as well as an analysis of his documentation. Through most of his life Tealdo was in the service of the Genoese commune, occupying different posts connected to both his solid professional competences and his military skills, as evidenced by the analysis of the fragments of a number of cartularies which show him as scribe of the castellanies of Bonifacio and Gavi and as tower-keeper of the castle of Portovenere.
Memento
Creators: name: McDonald, Natalie
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Fine Arts
subject: Fine Art
subject: Art Installation
subject: Transformation

description: The human experience is one of flux. We are constantly changing and moving through space, being altered from moment to moment. Everyone experiences transitionary stages in life, however it's the bigger shifts in life when we notice change is taking place. Recognizing that I have moved forward from my adolescence into adulthood I use the act of making art objects as a way to evaluate my situation and further understand this transition. I believe that through the imagery, text and installation of the artwork I produce, I not only am able to understand this act of becoming, but I also create an environment for the viewer to be affected and reflect on their own life transitions.
Report on Adaptable Open-Source Disaster Recovery Solution for Multi-Petabyte Storage Systems
Creators: name: Leong, Honwai
Publisher: name: Zenodo
Year: 2023

description: The current generation of Research Data Store (RDS) at The University of Sydney comprises a pair of peta-scale data storage systems. We implemented a disaster recovery (DR) solution for data protection against catastrophic failure at either storage system. To handle large amount of data transactions into RDS, we took an open-source approach to design an adaptable DR solution that enables parallelized data replication capability between the pair of storage systems. In the last three years of operations, the DR solution has gone through a few iterations which saw improvement in efficiency. In this paper, we present the findings and outcomes from our DR implementation.
Distributionally robust uncertainty quantification via data-driven stochastic optimal control
Creators: name: Pan, Guanru
name: Faulwasser, Timm
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper studies optimal control problems of unknown linear systems subject to stochastic disturbances of uncertain distribution. Uncertainty about the stochastic disturbances is usually described via ambiguity sets of probability measures or distributions. Typically, stochastic optimal control requires knowledge of underlying dynamics and is as such challenging. Relying on a stochastic fundamental lemma from data-driven control and on the framework of polynomial chaos expansions, we propose an approach to reformulate distributionally robust optimal control problems with ambiguity sets as uncertain conic programs in a finite-dimensional vector space. We show how to construct these programs from previously recorded data and how to relax the uncertain conic program to numerically tractable convex programs via appropriate sampling of the underlying distributions. The efficacy of our method is illustrated via a numerical example.
description: 6 pages,2 figures
Theatre as a place of learning : the forces and affects of devised theatre processes in education
Creators: name: Perry, Mia
Publisher: name: University of British Columbia
Year: 2010

description: This study investigates the forces and affects of contemporary devised theatre practices in education. Inquiries at two sites form the basis of research: an analysis of professional contemporary devising practice with regard to educational applications and implications within it; and an analysis of a devising process in a secondary school program to consider the benefits and limitations of this approach in the context of education. This work is situated within a poststructural perspective on embodied pedagogy (Davies, 2000; Ellsworth, 2005; St. Pierre & Pillow, 2000), and within the theory of nomadic thought, as developed by Giles Deleuze (1990; 1994) and his collaborations with Felix Guattari (1983; 1987). Taking up pedagogy in this light, I consider the student as a body/mind/self in motion (Ellsworth, 2005) and focus on a non-representational perspective of analysis, understanding pedagogy to be lived and experienced by means of forces of affect, sensation and interrelation. Accordingly, this study challenges the dominant perspective on pedagogy, as occurring and evaluated according to representational logic, reliant on semiotic systems. This study asks: What can be gained from a new lens through which to understand the construction of theatre and drama in education? And, what are the connections and crevices between theatre practices today and theatre and drama in education?
Nanocouplers for infrared and visible light
Creators: name: Andryieuski, Andrei
name: Lavrinenko, Andrei V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: An efficient and compact coupler - a device that matches a micro-waveguide and a nano-waveguide - is an essential component for practical applications of nanophotonic systems. The number of coupling approaches has been rapidly increasing in the past ten years with the help of plasmonic structures and metamaterials. In this paper we overview recent as well as common solutions for nanocoupling. More specifically we consider the physical principles of operation of the devices based on a tapered waveguide section, a direct coupler, a lens and a scatterer and support them with a number of examples.
description: 30 pages, 9 figures
Atomistic simulations of low-field mobility in Si nanowires: Influence of confinement and orientation
Creators: name: Neophytou, Neophytos
name: Kosina, Hans
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A simulation framework that couples atomistic electronic structures to Boltzmann transport formalism is developed and applied to calculate the transport characteristics of thin silicon nanowires (NWs) up to 12nm in diameter. The sp3d5s*-spin-orbit-coupled atomistic tight-binding (TB) model is used for the electronic structure calculation. Linearized Boltzmann transport theory is applied, including carrier scattering by phonons, surface roughness (SRS), and impurities. We present a comprehensive investigation of the low-field mobility in silicon NWs considering: i) n- and p-type NWs, ii) [100], [110], and [111] transport orientations, and iii) diameters from D=12nm (electronically almost bulk-like) down to D=3nm (ultra-scaled). The simulation results display strong variations in the characteristics of the different NW types. For n-type NWs, phonon scattering and SRS become stronger as the diameter is reduced and drastically degrade the mobility by up to an order of magnitude depending on the orientation. For the [111] and [110] p-type NWs, on the other hand, large mobility enhancements (of the order of ~4X) can be achieved as the diameter scales down to D=3nm. This enhancement originates from the increase in the subband curvatures as the diameter is scaled. It overcompensates for the mobility reduction caused by SRS in narrow NWs and offers an advantage with diameter scaling. Our results may provide understanding of recent experimental measurements, as well as guidance in the design of NW channel devices with improved transport properties.
description: 45 pages, 8 figures
Body Modification: Recombinant Materiality and Ethics in the Remediated Print Wor(l)d
Creators: name: Moynihan, Bridget
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Fine Arts
subject: Literature--English
subject: History--European
subject: Experimental Literature
subject: Artist's Books
subject: Altered Texts
subject: Ethics
subject: Materiality

description: This thesis examines two case studies of experimental print texts in order to trace how their materiality shapes their meanings. My case studies are Tom Phillips’s A Humument (5th ed., 2012) and Jonathan Safran Foer’s Tree of Codes (2010), both of which are altered texts that have materially manipulated an existing print text in their creative processes. Guided by the materially-focused and interdisciplinary theories of Bruno Latour, I strive to model a reading of these case studies that pays heed to the specificity of their materiality, as well as connecting them to related networks of other texts and material histories that are revealed by their interactions with the texts they alter. Through these case studies, this thesis therefore examines the communicative role of materiality more broadly, while questioning the attendant consequences, and even the ethics, of altering or appropriating this materiality.
Stable maps and Chow groups
Creators: name: Huybrechts, Daniel
name: Kemeny, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: According to the Bloch-Beilinson conjectures, an automorphism of a K3 surface X that acts as the identity on the transcendental lattice should act trivially on CH^2(X). We discuss this conjecture for symplectic involutions and prove it in one third of all cases. The main point is to use special elliptic K3 surfaces and stable maps to produce covering families of elliptic curves on the generic K3 surface that are invariant under the involution.
description: 11 pages
Systematical Studies of Mechanisms of Multi-thermal Fluid Stimulation for Heavy Oil Recovery
Creators: name: Zhang, Tianlin
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Engineering--Petroleum
subject: Offshore heavy oil reservoirs
subject: Multi-thermal fluids
subject: Stimulation mechanisms
subject: Production efficiency
subject: Reservoir adaptability
subject: Bohai oilfield

description: This paper studies Multi-thermal Fluid Stimulation (MTFS), a new process being used for offshore heavy oil reservoirs in Bohai oilfield, and successfully applied to development and production of offshore heavy oil reservoirs. However, its mechanisms and reservoir adaptability have not been systematically studied. Toward this end, a series of numerical models are developed and simulation studies are performed to determine the recovery mechanisms and screening criteria for the MTFS. In the NB35-2S reservoir, a homogeneous model is established and compared with field data, the thermal recovery characteristics, the influence of physical property parameters and the optimal thermal injection-production parameters are studied. The MTFS process is shown to enlarge the radius of a thermally swept volume, reduce heat loss, and increase formation energy. On the other hand, the total enthalpy carried by this process drops slightly. Finally, a scope of applications of the MTFS is established.
Note on Angular Momentum of Phonons in Chiral Crystals
Creators: name: Kato, Akihito
name: Kishine, Jun-ichiro
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Phonon angular momentum in chiral materials has been widely studied in spintronics and condensed matter physics. In chiral crystals, this is not the conserved quantity in contrast to the pseudo-angular momentum. To highlight this point and to understand the behavior of the angular momentum, we reexamined phonon dispersion theory based on the irreducible representation of helix and found the distinction of these angular momentum is originated from chirality.
description: 2 pages, 2 figures
Diagnostics of the Molecular Component of PDRs with Mechanical Heating
Creators: name: Kazandjian, M. V.
name: Meijerink, R.
name: Pelupessy, I.
name: Israel, F. P.
name: Spaans, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. Multitransition CO observations of galaxy centers have revealed that significant fractions of the dense circumnuclear gas have high kinetic temperatures, which are hard to explain by pure photon excitation, but may be caused by dissipation of turbulent energy. Aims. We aim to determine to what extent mechanical heating should be taken into account while modelling PDRs. To this end, the effect of dissipated turbulence on the thermal and chemical properties of PDRs is explored. Methods. Clouds are modelled as 1D semi-infinite slabs whose thermal and chemical equilibrium is solved for using the Leiden PDR-XDR code. Results. In a steady-state treatment, mechanical heating seems to play an important role in determining the kinetic temperature of the gas in molecular clouds. Particularly in high-energy environments such as starburst galaxies and galaxy centers, model gas temperatures are underestimated by at least a factor of two if mechanical heating is ignored. The models also show that CO, HCN and H2 O column densities increase as a function of mechanical heating. The HNC/HCN integrated column density ratio shows a decrease by a factor of at least two in high density regions with n \sim 105 cm-3, whereas that of HCN/HCO+ shows a strong dependence on mechanical heating for this same density range, with boosts of up to three orders of magnitude. Conclusions. The effects of mechanical heating cannot be ignored in studies of the molecular gas excitation whenever the ratio of the star formation rate to the gas density is close to, or exceeds, 7 \times 10-6 M yr-1 cm4.5 . If mechanical heating is not included, predicted column densities are underestimated, sometimes even by a few orders of magnitude. As a lower bound to its importance, we determined that it has non-negligible effects already when mechanical heating is as little as 1% of the UV heating in a PDR.
description: 26 pages, 14 figures in the text and 13 figures as supplementary material. Accepted for publication in A&A
Essays on International Trade
Creators: name: Wan, Shan
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Economics
subject: International Trade
subject: International Technology Diffusion
subject: State Vistis
subject: Quality

description: This thesis investigates three questions in international trade. Chapter 1 develops a multi-product firm model of international trade with the endogenous decisions on export and import to study technology diffusion via goods trade. This chapter shows, both theoretically and empirically, that a firm will import a product in the category where it already has higher expertise, which is consistent with the theoretical prediction. This chapter finds that a firm's productivity in a category improves when it imports in the same category, but only product expertise is accumulated, not the firm's ability. Chapter 2 examines the export market reallocation and the dynamics of export prices to the Czech Republic, Poland, Slovakia Republic, and Slovenia induced by their import tariff reduction in 2004. The empirical results show that import tariff reduction in these countries induces market reallocation towards the high-income countries and highly-priced products, suggesting the transition from low quality to high quality products. Moreover, this chapter finds that the transition pattern is heterogeneous across countries: in some countries, the market share was reallocated towards the middle-high income countries at the costs of the richest countries. Import tariff reduction significantly raised the price of exports to some countries. For example, export prices to Slovakia will rise by 46.5 percent if Slovakia completely removes its import tariff. The market organization is crucial for the effects of tariff reduction on prices. Chapter 3 studies whether state visits paid by Chinese political leaders promote trade between China and the host countries by analyzing China's trade flows with 184 countries between 1998 and 2014. This chapter uses a valid instrument to address endogeneity problem of state visits.The empirical results show that state visits don't increase trade between China and the host country immediately after the visits are made. The trade promotion effects come two years after the visits. Moreover, this chapter finds that the promotion effects are biased towards the industries and firms that have close political connections with the government, and that trade barriers such as quotas and licences offset the promotion effects of state visits.
Geoptics landscape apparency : a dynamic visual resource indicator and tool for multi-functional landscape planning
Creators: name: Fairhurst, Kenneth Barton
Publisher: name: University of British Columbia
Year: 2010

description: Forest managers must consider visual quality objectives to meet public expectations for use and enjoyment of forest landscapes. These applications of visual constraints have been criticized for being overly restrictive, and for causing a lack of opportunity for appropriate development. At the same time, inadequate planning and design can cause unnecessary visual impacts in the landscape. Past studies of visual vulnerability, visual magnitude, and angle of visual incidence have attempted to identify relative risk of visual impact. A new approach was sought that might help alleviate those problems, and improve the ability to forecast, model, and manage that risk. Perspectival variability affects how the landscape is seen, and poses complex challenges in the planning and management of visual resources. Therefore, a dynamic and quantitative approach to landscape classification was developed to provide greater understanding and control from multiple viewpoints. A landscape illumination mapping technique in a three-dimensional terrain model was applied as an analog for viewing from multiple viewpoints. The intensity of illumination, termed cumulative landscape apparency, provided an indicator of relative risk of visual impact for each grid cell in the landscape model. The model was validated internally through tests and applications and externally through focus group testing. Apparency can provide a new, reliable, geographic information system-based inventory measure that will help guide resource planning, design, and integration. It has been shown to offer a potential enhancement to visual landscape inventory, and is expected to be useful to land managers without a strong background in visual resource management, by reducing their reliance on experts and increasing their success in meeting visual quality objectives relative to current planning methods. Apparency was shown to reveal inherent patterns in the landscape that would be useful for differentiating areas requiring greater and lesser attention, improving harvest design outcomes, and partially automating or guiding the design. The knowledge gained in testing apparency for its relation to plan-to-perspective analysis can potentially provide an indicator for refining resource supply questions. Geoptics is expected to be applicable to a wide array of visual resource management and resource planning mechanisms in BC and other jurisdictions.
Gibbesia neglecta Gibbes 1850
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
Stomatopoda
Squillidae
Gibbesia
Gibbesia neglecta

description: Gibbesia neglecta (Gibbes, 1850)
Material examined (N=1). 1m, 19/IX/2000, 13°52’99”S / 38°59’59”W (MZUESC #58).
Distribution. Western Atlantic – North Carolina, Gulf of Mexico, and Brazil (from Ceará to Rio Grande do Sul) (Manning 1969; Gomes Corrêa 1986).
Ecological notes. On mud and sand with debris. From shallow waters to 64 m, but usually found in shallow waters (Manning 1969; Gomes Corrêa 1986).
Previous records in Bahia. Gomes Corrêa (1986) (as Squilla neglecta), Almeida et al. (2007) ..
Remarks. This species was transferred to the monotypic genus Gibbesia Manning & Heard, 1997, which is characterized by the absence of a mandibular palp (Manning & Heard 1997). Widely recorded along the Brazilian coast as Squilla neglecta.
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 6, DOI: 10.5281/zenodo.178168
A three-scale domain decomposition method for the 3D analysis of debonding in laminates
Creators: name: Kerfriden, Pierre
name: Allix, Olivier
name: Gosselet, Pierre
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The prediction of the quasi-static response of industrial laminate structures requires to use fine descriptions of the material, especially when debonding is involved. Even when modeled at the mesoscale, the computation of these structures results in very large numerical problems. In this paper, the exact mesoscale solution is sought using parallel iterative solvers. The LaTIn-based mixed domain decomposition method makes it very easy to handle the complex description of the structure; moreover the provided multiscale features enable us to deal with numerical difficulties at their natural scale; we present the various enhancements we developed to ensure the scalability of the method. An extension of the method designed to handle instabilities is also presented.
A Crystallizing White Dwarf in a Sirius-Like Quadruple System
Creators: name: Venner, Alexander
name: Blouin, Simon
name: Bédard, Antoine
name: Vanderburg, Andrew
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The observational signature of core crystallization of white dwarfs has recently been discovered. However, the magnitude of the crystallization-powered cooling delay required to match observed white dwarfs is larger than predicted by conventional models, requiring additional mechanisms of energy release in white dwarf interiors. The most ideal benchmarks for understanding this discrepancy would be bright and nearby crystallizing white dwarfs with total ages that can be externally constrained. In this work we report that a recently discovered white dwarf is a bound companion to the triple star HD 190412, forming a new Sirius-like system in the solar neighbourhood. The location of HD 190412 C on the $T_{\text{eff}}-\text{mass}$ diagram implies it is undergoing crystallization, making this the first confirmed crystallizing white dwarf whose total age can be externally constrained. Motivated by the possibility that a cooling delay caused by crystallization can be directly detected for this white dwarf we employ a variety of methods to constrain the age of the system; however, our empirical age anomaly of $+3.1\pm1.9$ Gyr is ultimately too imprecise to reach statistical significance, preventing us from making strong constraints to models of white dwarf crystallization. Our results are nonetheless compatible with the recent hypothesis that $^{22}$Ne phase separation is responsible for the excess cooling delay of crystallizing white dwarfs. The discovery of this system at only 32 parsecs suggests that similar benchmark systems are likely to be common; future discoveries may therefore provide powerful tests for models of white dwarf crystallization.
description: 19 pages, 8 figures, 8 tables. Published in MNRAS. Minor revisions included
Where is Every Body: Locating People Directly in Front of Large Screens using Multiple Kinects
Creators: name: Straathof, Gerry
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Computer Science
subject: Human Computer Interaction

description: Current methods for determining where people are in front of large screens or displays are either expensive, require wearable tracking hardware or are limited in what kind of information they provide. I describe an alternative method to register where people are in the space in front of large screens or displays using multiple Microsoft Kinects. This configuration allows us to track the presence of individuals, and determine whether their hands are hovering above the surface or if their hands are touching it. I describe the limitations of the traditional Kinect arrangement when it comes to large screens and discuss how our approach can avoid these limitations while offering potential for new methods of interaction development. Our new tracking method provides an inspiration for further development of what can be accomplished with inexpensive input devices.
Exotic R^4 and quantum field theory
Creators: name: Asselmeyer-Maluga, T.
name: Mader, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Recent work on exotic smooth R^4's, i.e. topological R^4 with exotic differential structure, shows the connection of 4-exotics with the codimension-1 foliations of $S^{3}$, SU(2) WZW models and twisted K-theory $K_{H}(S^{3})$, $H\in H^{3}(S^{3},\mathbb{Z})$. These results made it possible to explicate some physical effects of exotic 4-smoothness. Here we present a relation between exotic smooth R^4 and operator algebras. The correspondence uses the leaf space of the codimension-1 foliation of S^3 inducing a von Neumann algebra $W(S^{3})$ as description. This algebra is a type III_1 factor lying at the heart of any observable algebra of QFT. By using the relation to factor II, we showed that the algebra $W(S^{3})$ can be interpreted as Drinfeld-Turaev deformation quantization of the space of flat SL(2,\mathbb{C}) connections (or holonomies). Thus, we obtain a natural relation to quantum field theory. Finally we discuss the appearance of concrete action functionals for fermions or gauge fields and its connection to quantum-field-theoretical models like the Tree QFT of Rivasseau.
description: 15 pages, 2 figures, Based on the talk presented at Quantum Theory and Symmetries 7, Prague, August 7-13, 2011, JPconf style
Modeling electricity spot prices using mean-reverting multifractal processes
Creators: name: Rypdal, Martin
name: Løvsletten, Ola
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We discuss stochastic modeling of volatility persistence and anti-correlations in electricity spot prices, and for this purpose we present two mean-reverting versions of the multifractal random walk (MRW). In the first model the anti-correlations are modeled in the same way as in an Ornstein-Uhlenbeck process, i.e. via a drift (damping) term, and in the second model the anti-correlations are included by letting the innovations in the MRW model be fractional Gaussian noise with H < 1/2. For both models we present approximate maximum likelihood methods, and we apply these methods to estimate the parameters for the spot prices in the Nordic electricity market. The maximum likelihood estimates show that electricity spot prices are characterized by scaling exponents that are significantly different from the corresponding exponents in stock markets, confirming the exceptional nature of the electricity market. In order to compare the damped MRW model with the fractional MRW model we use ensemble simulations and wavelet-based variograms, and we observe that certain features of the spot prices are better described by the damped MRW model. The characteristic correlation time is estimated to approximately half a year.
description: 13 pages, 4 figures, 2 tables
Stress evolution in plastically deformed austenitic and ferritic steels determined using angle- and energy-dispersive diffraction
Creators: name: Marciszko-Wiackowska, M.
name: Baczmanski, A.
name: Braham, Ch.
name: Watroba, M.
name: Wronski, S.
name: Wawszczak, R.
name: Gonzalez, G.
name: Kot, P.
name: Klaus, M.
name: Genzel, Ch.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the presented research, the intergranular elastic interaction and the second-order plastic incompatibility stress in textured ferritic and austenitic steels were investigated by means of diffraction. The lattice strains were measured inside the samples by the multiple reflection method using high energy X-rays diffraction during uniaxial in situ tensile tests. Comparing experiment with various models of intergranular interaction, it was found that the Eshelby-Kröner model correctly approximates the X-ray stress factors (XSFs) for different reflections hkl and scattering vector orientations. The verified XSFs were used to investigate the evolution of the first and second-order stresses in both austenitic and ferritic steels. It was shown that considering only the elastic anisotropy, the non-linearity of $\sin^2ψ$ plots cannot be explained by crystallographic texture. Therefore, a more advanced method based on elastic-plastic self-consistent modeling (EPSC) is required for the analysis. Using such methodology the non-linearities of $\cos^2ϕ$ plots were explained, and the evolutions of the first and second-order stresses were determined. It was found that plastic deformation of about 1- 2% can completely exchange the state of second-order plastic incompatibility stresses.