cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Capacity building in universities: strengthening environmental science and management programs
Creators: name: Gordon, Bruce
Publisher: name: Environmental Design
Year: 2004

description: Bibliography: p. 133-140
description: A prerequisite to achieving sustainable development is the capability to protect the environment. Unfortunately, many countries lack this capability because of ineffective environmental institutions and weak or insufficient human resources. Central to developing these professionals and institutions is sustainable, high quality instruction in environmental science and management. Numerous universities, however, particularly in developing countries, lack the capacity to deliver effective programs of study in environmental education, their focus is often divorced from the needs of the community and country, and many are ill-equipped to carry out meaningful research programs. Capacity building is seen as essential to tackling these constraints. Drawing on the results of key informant interviews, a case study of a Faculty of Environmental Science in Peru, and professional experience within an international organization, recommendations were made so that universities could develop their capacity to provide effective environmental education. To do this efficiently, it was found that measures should be taken to ensure that an enabling policy environment exists at sub-national, national, and international levels, action should be taken to provide a supportive institutional environment within the university, and both shorter-term and long-term capacity building strategies should be developed and implemented. In this regard, a key strategy is to establish sustainable university partnerships and networks.
Quantum Zakharov Model in a Bounded Domain
Creators: name: Chueshov, Igor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35Q40, 35B40, 37L30

description: We consider an initial boundary value problem for a quantum version of the Zakharov system arising in plasma physics. We prove the global well-posedness of this problem in some Sobolev type classes and study properties of solutions. This result confirms the conclusion recently made in physical literature concerning the absence of collapse in the quantum Langmuir waves. In the dissipative case the existence of a finite dimensional global attractor is established and regularity properties of this attractor are studied. For this we use the recently developed method of quasi-stability estimates. In the case when external loads are $C^\infty$ functions we show that every trajectory from the attractor is $C^\infty$ both in time and spatial variables. This can be interpret as the absence of sharp coherent structures in the limiting dynamics.
description: 27 pages
Theory of optomechanics: Oscillator-field model of moving mirrors
Creators: name: Galley, Chad R.
name: Behunin, Ryan O.
name: Hu, B. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we present a model for the kinematics and dynamics of optomechanics which describe the coupling between an optical field, here modeled by a massless scalar field, and the internal (e.g., determining its reflectivity) and mechanical (e.g., displacement) degrees of freedom of a moveable mirror. As opposed to implementing boundary conditions on the field we highlight the internal dynamics of the mirror which provides added flexibility to describe a variety of setups relevant to current experiments. The inclusion of the internal degrees of freedom in this model allows for a variety of optical activities of mirrors from those exhibiting broadband reflective properties to the cases where reflection is suppressed except for a narrow band centered around the characteristic frequency associated with the mirror's internal dynamics. After establishing the model and the reflective properties of the mirror we show how appropriate parameter choices lead to useful optomechanical models such as the well known Barton-Calogeracos model [G. Barton and A. Calogeracos, Ann. Phys. 238, 227 (1995)] and the important yet lesser explored nonlinear models (e.g., $Nx$ coupling) for small photon numbers $N$, which present models based on side-band approximations [H. Kimble et al., Phys. Rev. D 65, 022002 (2001)] cannot cope with. As a simple illustrative application we consider classical radiation pressure cooling with this model. To expound its theoretical structure and physical meanings we connect our model to field-theoretical models using auxiliary fields and the ubiquitous Brownian motion model of quantum open systems. Finally we describe the range of applications of this model, from a full quantum mechanical treatment of radiation pressure cooling, quantum entanglement between macroscopic mirrors, to the backreaction of Hawking radiation on black hole evaporation in a moving mirror analog.
description: 27 pages, 3 figures
A sustainable development critique of the Russian oil and gas disposition system: learning from Canadian experience with intragenerational equity
Creators: name: Goudina, Ekaterina E.
Publisher: name: Law
Year: 2004

description: Bibliography: p. 152-158
description: This thesis aims to draw attention to the importance of taking into account the concept of sustainable development in reform of Russian oil and gas legislation. The thesis reviews the concept of sustainable development and focuses on one of its principles - the principle of intragenerational equity. The thesis evaluates the Russian oil and gas disposition system from the perspective of intragenerational equity. The results of this evaluation disclose a low degree of consistency with the concept. The thesis then turns to Canadian experience and evaluates the legal regime regulating mineral development in the Metis Settlements areas in Alberta for consistency with the principle of intragenerational equity. After carrying out a comparative analysis of the two legal regimes, the thesis concludes with suggestions as to improvement of the Russian legal regime, using the positive Canadian example, in order to increase the consistency of the former with the principle of intragenerational equity.
Stochastic homogenization of subdifferential inclusions via scale integration
Creators: name: Veneroni, Marco
Publisher: name: arXiv
Year: 2011
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35B27, 35R60 (35J60, 39B62)

description: We study the stochastic homogenization of the system -div σ^ε= f^εσ^ε\in \partial ϕ^ε(\nabla u^ε), where (ϕ^ε) is a sequence of convex stationary random fields, with p-growth. We prove that sequences of solutions (σ^ε,u^ε) converge to the solutions of a deterministic system having the same subdifferential structure. The proof relies on Birkhoff's ergodic theorem, on the maximal monotonicity of the subdifferential of a convex function, and on a new idea of scale integration, recently introduced by A. Visintin.
description: 23 pages
Orientation control strategies and adaptation to a visuomotor perturbation in rotational hand movements.
Creators: name: Zruya, Or
name: Nisky, Ilana
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: subject: Research Article
subject: Biology and life sciences
subject: Medicine and health sciences
subject: Physical sciences
subject: FOS: Physical sciences
subject: Engineering and technology
subject: FOS: Engineering and technology
subject: Social sciences
subject: FOS: Social sciences

description: Computational approaches to biological motor control are used to discover the building blocks of human motor behaviour. Models explaining features of human hand movements have been studied thoroughly, yet only a few studies attempted to explain the control of the orientation of the hand; instead, they mainly focus on the control of hand translation, predominantly in a single plane. In this study, we present a new methodology to study the way humans control the orientation of their hands in three dimensions and demonstrate it in two sequential experiments. We developed a quaternion-based score that quantifies the geodicity of rotational hand movements and evaluated it experimentally. In the first experiment, participants performed a simple orientation-matching task with a robotic manipulator. We found that rotations are generally performed by following a geodesic in the quaternion hypersphere, which suggests that, similarly to translation, the orientation of the hand is centrally controlled, possibly by optimizing geometrical properties of the hand's rotation. This result established a baseline for the study of human response to perturbed visual feedback of the orientation of the hand. In the second experiment, we developed a novel visuomotor rotation task in which the rotation is applied on the hand's rotation, and studied the adaptation of participants to this rotation, and the transfer of the adaptation to a different initial orientation. We observed partial adaptation to the rotation. The patterns of the transfer of the adaptation to a different initial orientation were consistent with the representation of the orientation in extrinsic coordinates. The methodology that we developed allows for studying the control of a rigid body without reducing the dimensionality of the task. The results of the two experiments open questions for future studies regarding the mechanisms underlying the central control of hand orientation. These results can be of benefit for many applications that involve fine manipulation of rigid bodies, such as teleoperation and neurorehabilitation.
Implications of finite one-loop corrections for seesaw neutrino masses
Creators: name: Sierra, D. Aristizabal
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the standard seesaw model, finite corrections to the neutrino mass matrix arise from one-loop self-energy diagrams mediated by a heavy neutrino. We discuss the impact that these corrections may have on the different low-energy neutrino observables paying special attention to their dependence with the seesaw model parameters. It is shown that sizable deviations from the tri-bimaximal mixing pattern can be obtained when these corrections are taken into account.
description: 4 pages, 3 figures. Prepared for the proceedings of the 12th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2011), Munich, Germany, 5-9 September 2011
Heavy-tailed distributions of confirmed COVID-19 cases and deaths in spatiotemporal space
Creators: name: Liu, Peng
name: Zheng, Yanyan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Biological Physics (physics.bio-ph)
subject: Medical Physics (physics.med-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: This paper conducts a systematic statistical analysis of the characteristics of the geographical empirical distributions for the numbers of both cumulative and daily confirmed COVID-19 cases and deaths at county, city, and state levels over a time span from January 2020 to June 2022. The mathematical heavy-tailed distributions can be used for fitting the empirical distributions observed in different temporal stages and geographical scales. The estimations of the shape parameter of the tail distributions using the Generalized Pareto Distribution also support the observations of the heavy-tailed distributions. According to the characteristics of the heavy-tailed distributions, the evolution course of the geographical empirical distributions can be divided into three distinct phases, namely the power-law phase, the lognormal phase I, and the lognormal phase II. These three phases could serve as an indicator of the severity degree of the COVID-19 pandemic within an area. The empirical results suggest important intrinsic dynamics of a human infectious virus spread in the human interconnected physical complex network. The findings extend previous empirical studies and could provide more strict constraints for current mathematical and physical modeling studies, such as the SIR model and its variants based on the theory of complex networks.
Analysis on the evolution process of BFW-like model with explosive percolation of multiple giant components
Creators: name: Zhang, Renquan
name: Wei, Wei
name: Guo, Binghui
name: Zhang, Yang
name: Zheng, Zhiming
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Recently, the modified BFW model on random graph [Phys. Rev. Lett., 106, 115701 (2011)], which shows a strongly discontinuous percolation transition with multiple giant components, has attracted much attention from physicists, statisticians and materials scientists. In this paper, by establishing the theoretical expression of evolution equations on the modified BFW model, the steady-state and evolution process are analyzed and a close correspondence is built between the values of parameter αand the number of giant components in steady-states, which fits very well with the numerical simulations. In fact, with the value of αdecreasing to 0.25, the error between theoretical and numerical results is smaller than 4% and trends to 0 rapidly. Furthermore, the sizes of giant components for different evolution strategies can also be obtained by solving some constraints derived from the evolution equations. The analysis of the steady-state and evolution process is of great help to explain why the percolation of modified BFW model is explosive and how explosive it is.
description: 12 pages, 5 figures
Atemtanais : Bird 2011
Creators: name: BIRD, GRAHAM J.
name: BAMBER, ROGER N.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Tanaidacea
Paratanaidae
Atemtanais

description: Atemtanais Bird, 2011
 Atemtanais: Bird (2011): 17 –18.
 Diagnosis [additional to Bird 2011). Antennule article-2 PSS short. Antenna articles 2–4 without longitudinal ridge. Mandible body smooth. Cheliped palm with kukri-shaped sinuate spine. Pereopods 2–3 carpus inferior pair of spines stout [as long as broad], subequal. Pereopods 4–6 carpus without elevated rows of spinules on inferior margin.
 Distribution. New Zealand, sublittoral.
 Remarks. A robust paratanaid genus characterised by the antenna article-3 bearing a stiff seta rather than an acute spine, pleonites only with simple lateral setae, and very short uropods. The short inferodistal spines on the carpus of pereopods 2–3 and the lack of clinging apparatus on the carpus of pereopods 4–6 are also distinctive characters, although the last is shared by another new paratanaid genus [see below]. A single species is known, A. taikaha Bird, 2011, from New Zealand.
description: Published as part of BIRD, GRAHAM J. & BAMBER, ROGER N., 2013, New littoral, shelf, and bathyal Paratanaidae (Crustacea: Peracarida: Tanaidacea) from New Zealand, with descriptions of three new genera, pp. 1-71 in Zootaxa 3676 (1) on page 20, DOI: 10.11646/zootaxa.3676.1.1, http://zenodo.org/record/5597797
Internal corporate venturing in family firms: a strategic management approach with empirical evidence on venturing goals
Creators: name: Greidanus, Nathan
Publisher: name: Haskayne School of Business
Year: 2004

description: Bibliography: p. 155-166
description: The following thesis analyzes Internal Corporate Venturing (!CV) in Family Firms from a Strategic Management Process (SMP) framework. The goal variable from this framework is isolated and analyzed based on a qualitative study of family firms that have proceeded with corporate venturing. Findings from the SMP framework literature analysis suggest a number of areas where the unique characteristics of family firms might influence the adoption of ICV Potential research questions surrounding these areas are presented. The empirical analysis, based on semi-structured interviews of 6 firms and covering 24 ventures, leads to the development of 12 testable propositions surrounding the goals variable in the SMP framework. Limitations of the current research and future directions are discussed.
Universal Sampling Lower Bounds for Quantum Error Mitigation
Creators: name: Takagi, Ryuji
name: Tajima, Hiroyasu
name: Gu, Mile
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Numerous quantum error-mitigation protocols have been proposed, motivated by the critical need to suppress noise effects on intermediate-scale quantum devices. Yet, their general potential and limitations remain elusive. In particular, to understand the ultimate feasibility of quantum error mitigation, it is crucial to characterize the fundamental sampling cost -- how many times an arbitrary mitigation protocol must run a noisy quantum device. Here, we establish universal lower bounds on the sampling cost for quantum error mitigation to achieve the desired accuracy with high probability. Our bounds apply to general mitigation protocols, including the ones involving nonlinear postprocessing and those yet-to-be-discovered. The results imply that the sampling cost required for a wide class of protocols to mitigate errors must grow exponentially with the circuit depth for various noise models, revealing the fundamental obstacles in the scalability of useful noisy near-term quantum devices.
description: 5+15 pages, 4 figures, published version; See also a related work by Tsubouchi et al., which appeared in the same arXiv posting as arXiv:2208.09385
Multiple Instance Neuroimage Transformer
Creators: name: Singla, Ayush
name: Zhao, Qingyu
name: Do, Daniel K.
name: Zhou, Yuyin
name: Pohl, Kilian M.
name: Adeli, Ehsan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: For the first time, we propose using a multiple instance learning based convolution-free transformer model, called Multiple Instance Neuroimage Transformer (MINiT), for the classification of T1weighted (T1w) MRIs. We first present several variants of transformer models adopted for neuroimages. These models extract non-overlapping 3D blocks from the input volume and perform multi-headed self-attention on a sequence of their linear projections. MINiT, on the other hand, treats each of the non-overlapping 3D blocks of the input MRI as its own instance, splitting it further into non-overlapping 3D patches, on which multi-headed self-attention is computed. As a proof-of-concept, we evaluate the efficacy of our model by training it to identify sex from T1w-MRIs of two public datasets: Adolescent Brain Cognitive Development (ABCD) and the National Consortium on Alcohol and Neurodevelopment in Adolescence (NCANDA). The learned attention maps highlight voxels contributing to identifying sex differences in brain morphometry. The code is available at https://github.com/singlaayush/MINIT.
The f2(1565) in pbar-p -> (omega-omega)pizero interactions at rest
Creators: name: Baker, C. A.
name: Barnett, B. M.
name: Batty, C. J.
name: Braune, K.
name: Bugg, D. V.
name: Cramer, O.
name: Crede, V.
name: Djaoshvili, N.
name: Dunnweber, W.
name: Faessler, M. A.
name: Hessey, N. P.
name: Hidas, P.
name: Hodd, C.
name: Jamnik, D.
name: Kalinowsky, H.
name: Kisiel, J.
name: Klempt, E.
name: Kolo, C.
name: Montanet, L.
name: Pick, B.
name: Roethel, W.
name: Sarantsev, A.
name: Scott, I.
name: Strassburger, C.
name: Thoma, U.
name: Volker, C.
name: Wallis, S.
name: Walther, D.
name: Wittmack, K.
name: Zou, B. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Data are presented on the reaction pbar-p -> omega-omega-pizero at rest from the Crystal Barrel detector. These data identify a strong signal due to f2(1565) -> omega-omega. The relative production from initial pbar-p states 3P2, 3P1 and 1S0 is well determined from omega-omega decay angular correlations; P-state annihilation dominates strongly. A combined fit is made with data on pbar-p -> 3pizero at rest, where f2(1565) -> pizero-pizero is observed.
description: Demonstrates that f2(1565) and f2(1640) are two decay modes of the same resonance, 11 pages, 5 figures
Mechanochemical Active Ratchet
Creators: name: Ryabov, Artem
name: Tasinkevych, Mykola
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Self-propelled nanoparticles moving through liquids offer the possibility of creating advanced applications where such nanoswimmers can operate as artificial molecular-sized motors. Achieving control over the motion of nanoswimmers is a crucial aspect for their reliable functioning. While the directionality of micron-sized swimmers can be controlled with great precision, steering nano-sized active particles poses a real challenge. One of the reasons is the existence of large fluctuations of active velocity at the nanoscale. Here, we describe a mechanism that, in the presence of a ratchet potential, transforms these fluctuations into a net current of active nanoparticles. We demonstrate the effect using a generic model of self-propulsion powered by chemical reactions. The net motion along the easy direction of the ratchet potential arises from the coupling of chemical and mechanical processes and is triggered by a constant, transverse to the ratchet, force. The current magnitude sensitively depends on the amplitude and the periodicity of the ratchet potential and the strength of the transverse force. Our results highlight the importance of thermodynamically consistent modeling of chemical reactions in active matter at the nanoscale and suggest new ways of controlling dynamics in such systems.
description: 14 pages, 5 figures, to appear in Sci. Rep
On Relativistic Quantum Information Properties of Entangled Wave Vectors of Massive Fermions
Creators: name: Cafaro, C.
name: Capozziello, S.
name: Mancini, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study special relativistic effects on the entanglement between either spins or momenta of composite quantum systems of two spin-1/2 massive particles, either indistinguishable or distinguishable, in inertial reference frames in relative motion. For the case of indistinguishable particles, we consider a balanced scenario where the momenta of the pair are well-defined but not maximally entangled in the rest frame while the spins of the pair are described by a one-parameter ($η$) family of entangled bipartite states. For the case of distinguishable particles, we consider an unbalanced scenario where the momenta of the pair are well-defined and maximally entangled in the rest frame while the spins of the pair are described by a one-parameter ($ξ$) family of non-maximally entangled bipartite states. In both cases, we show that neither the spin-spin ($ss$) nor the momentum-momentum ($mm$) entanglements quantified by means of Wootters' concurrence are Lorentz invariant quantities: the total amount of entanglement regarded as the sum of these entanglements is not the same in different inertial moving frames. In particular, for any value of the entangling parameters, both $ss$ and $mm$-entanglements are attenuated by Lorentz transformations and their parametric rates of change with respect to the entanglements observed in a rest frame have the same monotonic behavior. However, for indistinguishable (distinguishable) particles, the change in entanglement for the momenta is (is not) the same as the change in entanglement for spins. As a consequence, in both cases, no entanglement compensation between spin and momentum degrees of freedom occurs.
description: 21 pages, 8 figures
Orthogonal layers of parallelism in large-scale eigenvalue computations
Creators: name: Alvermann, Andreas
name: Hager, Georg
name: Fehske, Holger
Publisher: name: arXiv
Year: 2022
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: We address the communication overhead of distributed sparse matrix-(multiple)-vector multiplication in the context of large-scale eigensolvers, using filter diagonalization as an example. The basis of our study is a performance model which includes a communication metric that is computed directly from the matrix sparsity pattern without running any code. The performance model quantifies to which extent scalability and parallel efficiency are lost due to communication overhead. To restore scalability, we identify two orthogonal layers of parallelism in the filter diagonalization technique. In the horizontal layer the rows of the sparse matrix are distributed across individual processes. In the vertical layer bundles of multiple vectors are distributed across separate process groups. An analysis in terms of the communication metric predicts that scalability can be restored if, and only if, one implements the two orthogonal layers of parallelism via different distributed vector layouts. Our theoretical analysis is corroborated by benchmarks for application matrices from quantum and solid state physics, road networks, and nonlinear programming. We finally demonstrate the benefits of using orthogonal layers of parallelism with two exemplary application cases -- an exciton and a strongly correlated electron system -- which incur either small or large communication overhead.
description: Final version, almost as published. 32 pages, 12 figures
title: Teaching Greek as a heritage language in Switzerland – Teachers’ perspectives and lived experiences of language and education
Creators: name: Becker, Anna
Publisher: name: Universitäts- und Landesbibliothek Darmstadt
Year: 2023

description: Switzerland has traditionally been a multilingual country with four national languages and has a plethora of regional dialects. It has also been home to many migrants who, as heritage speakers, enrich the heterogeneous linguistic landscape, yet rarely receive (sufficient) official or institutional recognition. This text investigates teachers’ lived experiences of language and education in a Greek school in Switzerland founded by parents on a voluntary basis to transmit Greek language and culture. It presents data from six in-depth teacher interviews and aims at a better understanding of educational practices and experiences of teachers who are often excluded from local educational institutions. It argues for a greater awareness and recognition of heritage languages, their teachers and learners as well as for a more inclusive and cooperative approach to multilingual education. This can be achieved by integrating heritage language education into mainstream schooling and thus providing legitimacy, a sense of belonging, and equity to all educational sphere actors.
Disorder Induced Anomalous Thermal Hall Effect in Chiral Phases of Superfluid $^3$He
Creators: name: Sharma, Priya
name: Vorontsov, Anton B.
name: Sauls, J. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: NMR experiments on liquid $^3$He infused into uniaxially anisotropic silica aerogels show the stabilisation of two equal-spin-pairing chiral phases on cooling from the normal phase. The alignment of the chiral axis relative to the anisotropy axis for these phases is predicted to depend upon temperature. A chiral A-like phase is also stabilized when $^3$He is confined to a slab of thickness $D\sim ξ$, the superfluid coherence length. For both types of confinement, scattering of quasiparticles by the random potential - aerogel or surface - is pair breaking and generates a sub-gap density of quasiparticle states. The random field also conspires with the chiral order parameter to generate skew scattering of quasiparticles in the plane normal to the chiral axis. This scattering mechanism leads to anomalous thermal Hall transport for nonequilibrium quasiparticles driven by a thermal gradient. We report theoretical results for the anomalous thermal Hall conductivity for theoretical models for chiral phases of $^3$He in both anisotropic aerogel and slabs. The anomalous thermal Hall effect (ATHE) provides an important tool to identify signatures of broken time-reversal and mirror symmetries and topology in chiral superconductors/superfluids.
description: 5 pages, 3 figures, Proceeding of LT29 conference, Hokkaido, Japan
Precision measurement of the return distribution property of the Chinese stock market index
Creators: name: Liu, Peng
name: Zheng, Yanyan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Physics and Society (physics.soc-ph)
subject: General Finance (q-fin.GN)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: This paper systematically conducts an analysis of the composite index 1-min datasets over the 17-year period (2005-2021) for both the Shanghai and Shenzhen stock exchanges. To reveal the difference between the Chinese and the mature stock markets, here we precisely measure the property of return distribution of composite index over the time scale $Δt$ ranging from 1 min up to almost 4,000 min. The main findings are as follows. (1) Return distribution presents a leptokurtic, fat-tailed, and almost symmetrical shape, which is similar to that of mature markets. (2) The central part of return distribution is well described by the symmetrical Lévy $α$-stable process with a stability parameter comparable with the value of about 1.4 extracted in the U.S. stock market. (3) Return distribution can be well described by the student's t-distribution within a wider return range than the Lévy $α$-stable distribution. (4) Distinctively, the stability parameter shows a potential change when $Δt$ increases, and thus a crossover region at 15 $< Δt <$ 60 min is observed. This is different from the finding in the U.S. stock market where a single value of about 1.4 holds over 1 $\le Δt \le$ 1,000 min. (5) The tail distribution of returns at small $Δt$ decays as an asymptotic power-law with an exponent of about 3, which is a value widely existing in mature markets. However, it decays exponentially when $Δt \ge$ 240 min, which is not observed in mature markets. (6) Return distributions gradually converge to Gaussian as $Δt$ increases. This observation is different from the finding of a critical $Δt =$ 4 days in the U.S. stock market.
title: Gry miejskie jako współczesna, oryginalna i innowacyjna metoda nauczania i uczenia się seniorów
Creators: name: Jurczyk-Romanowska, Ewa
name: Koszyc, Marta
name: Jakubowska, Luba
name: Marcinkiewicz-Wilk, Aleksandra
name: Gulanowski, Jacek
name: Kabát, Michal
name: Švecová, Magdaléna
name: Milenkovic Jankovic, Tijana
name: Barone, Paola
name: Giannelaki, Charoula
name: Žemaitaitytė, Irena
name: Katkonienė, Agata
name: Januškevičiūtė, Asta
name: Indrašienė, Valdonė
Publisher: name: Uniwersytet Wrocławski. Instytut Pedagogiki
Year: 2019

description: Podręcznik składa się z trzech części. W pierwszym rozdziale dokonano diagnozy dotyczącej osób starszych i ich kompetencji w zakresie nowych technologii. W tym rozdziale opisano także dostępne w krajach partnerskich programy edukacyjne w zakresie ICT skierowane do osób starszych. Kolejny rozdział zawiera opis i wyniki eksperymentu pedagogicznego, którego celem było porównanie efektywności metody uczenia seniorów używania smartfonów. W eksperymencie porównano metodę klasowo-lekcyjną, która dominuje w ofercie edukacyjnej skierowanej do seniorów, z metodą zgodną ze strategiąedutainmentu – gry miejskiej. Ostatnia część zawiera scenariusze zajęć, dedykowanych zarówno metodzie gier miejskich, jak i zajęciom klasowo-lekcyjnym. Prezentowany Czytelnikowi podręcznik może być interesującą pozycją dla praktyków zajmujących się andragogiką, edukacją osób starszych czy edukacją w zakresie ICT, gdyż zawiera gotowe programy edukacyjne, które można bezpośrednio implementować we własnej praktyce związanej z edukacją seniorów. Warto także zauważyć, że wyniki przeprowadzonych badań w istotny sposób wzbogacają obszar andragogiki i dydaktyki, ukazując grę miejską jako efektywną metodę uczenia się
Intrinsic sub-Laplacian for hypersurface in a contact sub-Riemannian manifold
Creators: name: Barilari, Davide
name: Habermann, Karen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 53C17, 53B25, 58J65

description: We construct and study the intrinsic sub-Laplacian, defined outside the set of characteristic points, for a smooth hypersurface embedded in a contact sub-Riemannian manifold. We prove that, away from characteristic points, the intrinsic sub-Laplacian arises as the limit of Laplace-Beltrami operators built by means of Riemannian approximations to the sub-Riemannian structure using the Reeb vector field. We carefully analyse three families of model cases for this setting obtained by considering canonical hypersurfaces embedded in model spaces for contact sub-Riemannian manifolds. In these model cases, we show that the intrinsic sub-Laplacian is stochastically complete and in particular, that the stochastic process induced by the intrinsic sub-Laplacian almost surely does not hit characteristic points.
description: 24 pages
The role Alfvén waves in the generation of Earth polar auroras
Creators: name: Mottez, Fabrice
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The acceleration of electrons at 1-10 keV energies is the cause of the polar aurora displays, and an important factor of magnetic energy transfer from the solar wind to the Earth. Two main families of acceleration processes are observed: those based on coherent quasi-static structures called double layers, and those based of the propagation of Alfvén Waves (AW). This paper is a review of the Alfvénic acceleration processes, and of their role in the global dynamics of the auroral zone.
description: To be published in the proceeding of "Waves and Instabilities in Space and Astrophysical Plasmas" (WISAP) Eilat, Israel, June 19th - June 24th, 2011 "
Depositional environment and diagenesis of the Lower Mannville Sunburst Member, Bantry Field, SE Alberta
Creators: name: Halleran, Arthur Alvin Douglas
Publisher: name: University of Calgary
Year: 2003
Subjects: subject: AC1 .T484 2003 H35A
subject: Additional copy: AC1 .T484 2003 H35 (Gallagher)

description: Bibliography: p. 287-299
Chiral and nodal superconductors in t-J model with valley contrasting flux on triangular moiré lattice
Creators: name: Zhou, Boran
name: Zhang, Ya-Hui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recent experimental progresses have made it possible to simulate spin 1/2 Hubbard model on triangular lattice in moiré materials formed by transition metal dichalcogenide (TMD) heterobilayer or homobilayer. In twisted TMD homobilayer, a vertical electric field can induce a valley contrasting flux in the hopping term. In this paper we study possible superconductors from a t-J model with valley contrasting flux $Φ$ using the slave boson mean field theory. We obtain a phase diagram with doping $x$ and $Φ$. A finite $Φ$ breaks spin rotation symmetry and the pairing symmetry is a superposition of spin singlet $d-id$ and spin triplet $p+ip$. There are two topological phase transitions when tuning $Φ$ from $0$ to $π$, with three Dirac nodes at one transition and one single Dirac node at the other transition. We also discuss the effects of van Hove singularity and a three-site correlated hopping term on the pairing strength. Lastly, we demonstrate that a small anisotropy term breaking the $C_3$ rotation can lead to a time reversal invariant nodal superconductor connected to the $d_{x^2-y^2}$ superconductor on square lattice.
Exponential Convergence of hp FEM for the Integral Fractional Laplacian in Polygons
Creators: name: Faustmann, Markus
name: Marcati, Carlo
name: Melenk, Jens Markus
name: Schwab, Christoph
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We prove exponential convergence in the energy norm of $hp$ finite element discretizations for the integral fractional diffusion operator of order $2s\in (0,2)$ subject to homogeneous Dirichlet boundary conditions in bounded polygonal domains $Ω\subset \mathbb{R}^2$. Key ingredient in the analysis are the weighted analytic regularity from our previous work and meshes that feature anisotropic geometric refinement towards $\partialΩ$.
Epitaxial synthesis of unintentionally doped p-type SnO (001) via suboxide molecular beam epitaxy
Creators: name: Egbo, Kingsley
name: Luna, Esperanza
name: Lähnemann, Jonas
name: Hoffmann, Georg
name: Trampert, Achim
name: Grümbel, Jona
name: Kluth, Elias
name: Feneberg, Martin
name: Goldhahn, Rüdiger
name: Bierwagen, Oliver
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By employing a mixed SnO$_2$+Sn source, we demonstrate suboxide molecular beam epitaxy growth of phase-pure single crystalline metastable SnO(001) thin films at a growth rate of ~1.0nm/min without the need for additional oxygen. These films grow epitaxially across a wide substrate temperature range from 150 to 450°C. Hence, we present an alternative pathway to overcome the limitations of high Sn or SnO$_2$ cell temperatures and narrow growth windows encountered in previous MBE growth of metastable SnO. In-situ laser reflectometry and line-of-sight quadrupole mass spectrometry were used to investigate the rate of SnO desorption as a function of substrate temperature. While SnO ad-molecules desorption at Ts = 450°C was growth-rate limiting,the SnO films did not desorb at this temperature after growth in vacuum. The SnO (001) thin films are transparent and unintentionally p-type doped, with hole concentrations and mobilities in the range of 0.9 to 6.0x10$^{18}$cm$^{-3}$ and 2.0 to 5.5 cm$^2$/V.s, respectively. These p-type SnO films obtained at low temperatures are promising for back-end-of-line (BEOL) compatible applications and for integration with n-type oxides in p-n heterojunction and field-effect transistors
description: 18 pages, 10 figures
Electromagnetic Response of Superconducting RF Cavities
Creators: name: Ueki, Hikaru
name: Zarea, Mehdi
name: Sauls, J. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recently reported anomalies in frequency shift of order $δf\sim 0.1 -10\,\mbox{kHz}$ for Niobium SRF cavities in a narrow temperature region near $T_c\simeq 9\,\mbox{K}$ are sensitive to the surface preparation and Nitrogen doping. We developed methods for calculating the surface current response of Nb SRF cavities, as well as the resonant frequency shift and quality factor, as functions of temperature, frequency and disorder based on the Keldysh formulation of the theory for nonequilibrium superconductivity coupled with Maxwell's theory and boundary conditions for the response functions and electromagnetic field. We show that the anomaly is sensitive to impurity disorder. Our results for the anomaly in the frequency shift are in good agreement with experimental results for Nb with an anisotropic gap on the Fermi surface and inhomogeneous non-magnetic disorder. We also show that the quality factor as a function of the impurity scattering rate is maximum for in SRF cavities with intermediate disorder, $\hbar/τΔ\sim{\cal O}(1)$ with the maximum $Q$ decreasing with increasing frequency.
description: 6 pages, 3 figures
Fluid flow modelling in cortical bone
Creators: name: Hamilton, Nicolas
Publisher: name: University of Calgary
Year: 2005

description: Bibliography: p. 100-108
description: Some pages are in colour.
description: It is well accepted that loading-induced fluid flow is one of the key factors in triggering bone modeling and remodelling processes through which bones maintain adequate bone mass and architecture. To develop a unique model to provide a more complete picture of fluid flow in bone, STARS, a CMG (Computer Modeling Group Ltd.) porous media fluid flow and mechanical displacement simulator designed for oil recovery applications, was implemented. Three models were constructed to run on STARS to study the effect of cyclical loading and diffusion on fluid flow and nutrient transport in cortical bone. These models included a mouse tibia model, based on a 2D ?CT image, a human bone sample model based on a 3D ?CT reconstruction and an idealized osteon model. The results revealed the sites of high and low fluid flow as well as tracer transport at the full bone and osteon levels.
Moral Blackmail and the Family
Creators: name: Keller, Simon
Publisher: name: Open Access Victoria University of Wellington | Te Herenga Waka
Year: 2021
Subjects: subject: 160699 Political Science not elsewhere classified
subject: FOS: Political science
subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: 220199 Applied Ethics not elsewhere classified

description: Moral blackmail is a wrongful strategy intended to force a person to perform an act by manipulating her circumstances so as to make it morally wrong for her to do anything else. The idea of moral blackmail can seem paradoxical, but moral blackmail is a coherent and indeed a familiar phenomenon. It has special significance for our intimate personal relationships and is often a force within family dynamics. It is used to enforce power relationships within families, and in particular to uphold expectations that women and girls will do most of the work in caring for vulnerable family members. It is also used as a tool of policy makers, to transfer to families duties of care that would otherwise be discharged by the government or by society at large. It is an important but under-recognized source of ongoing manipulation and exploitation.
Renewable Composite Quantile Method and Algorithm for Nonparametric Models with Streaming Data
Creators: name: Chen, Yan
name: Fang, Shuixin
name: Lin, Lu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation (stat.CO)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: We are interested in renewable estimations and algorithms for nonparametric models with streaming data. In our method, the nonparametric function of interest is expressed through a functional depending on a weight function and a conditional distribution function (CDF). The CDF is estimated by renewable kernel estimations combined with function interpolations, based on which we propose the method of renewable weighted composite quantile regression (WCQR). Then we fully use the model structure and obtain new selectors for the weight function, such that the WCQR can achieve asymptotic unbiasness when estimating specific functions in the model. We also propose practical bandwidth selectors for streaming data and find the optimal weight function minimizing the asymptotic variance. The asymptotical results show that our estimator is almost equivalent to the oracle estimator obtained from the entire data together. Besides, our method also enjoys adaptiveness to error distributions, robustness to outliers, and efficiency in both estimation and computation. Simulation studies and real data analyses further confirm our theoretical findings.
description: 24 pages, 0 figures
Understanding neutrino properties from decoupling right-handed neutrinos and extra Higgs doublets
Creators: name: Ibarra, Alejandro
name: Simonetto, Cristoforo
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Low energy effects induced by heavy extra degrees of freedom are suppressed by powers of the large mass scale, thus preserving, if sufficiently heavy, the successes of the Standard Model in describing low energy phenomena. However, as is well known, heavy right-handed neutrinos may play an important role in low energy phenomenology as an explanation of the smallness of neutrino masses. We consider in this paper an extension of the Standard Model by heavy right-handed neutrinos and heavy Higgs doublets and we show, using a renormalization group approach, that this model can simultaneously provide an explanation for the small neutrino masses and for the mild hierarchy observed between the atmospheric and the solar mass splittings, even when the extra degrees of freedom are very heavy. We analyze the necessary conditions to reproduce the oscillation parameters and we discuss possible experimental signatures of this model.
description: 22 pages, 2 figures
A database of high precision trivial choreographies for the planar three-body problem
Creators: name: Hristov, I.
name: Hristova, R.
name: Puzynin, I.
name: Puzynina, T.
name: Sharipov, Z.
name: Tukhliev, Z.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Chaotic Dynamics (nlin.CD)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 65L05, 70F07

description: Trivial choreographies are special periodic solutions of the planar three-body problem. In this work we use a modified Newton's method based on the continuous analog of Newton's method and a high precision arithmetic for a specialized numerical search for new trivial choreographies. As a result of the search we computed a high precision database of 462 such orbits, including 397 new ones. The initial conditions and the periods of all found solutions are given with 180 correct decimal digits. 108 of the choreographies are linearly stable, including 99 new ones. The linear stability is tested by a high precision computing of the eigenvalues of the monodromy matrices.
description: 10 pages, 3 figures, 1 table. arXiv admin note: substantial text overlap with arXiv:2203.02793
Liquid ground state, gap and excited states of a strongly correlated spin chain
Creators: name: Lesanovsky, Igor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present an exact solution of an experimentally realizable and strongly interacting one-dimensional spin system which is a limiting case of a quantum Ising model with long range interaction in a transverse and longitudinal field. Pronounced quantum fluctuations lead to a strongly correlated liquid ground state. For open boundary conditions the ground state manifold consists of four degenerate sectors whose quantum numbers are determined by the orientation of the edge spins. Explicit expressions for the entanglement properties, the excitation gap as well as the exact wave functions for a couple of excited states are analytically derived and discussed.