cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum Measurements of Scattered Particles
Creators: name: Merkli, Marco
name: Penney, Mark
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate the process of quantum measurements on scattered probes. Before scattering, the probes are independent, but they become entangled afterwards, due to the interaction with the scatterer. The collection of measurement results (the history) is a stochastic process of dependent random variables. We link the asymptotic properties of this process to spectral characteristics of the dynamics. We show that the process has decaying time correlations and that a zero-one law holds. We deduce that if the incoming probes are not sharply localized with respect to the spectrum of the measurement operator, then the process does not converge. Nevertheless, the scattering modifies the measurement outcome frequencies, which are shown to be the average of the measurement projection operator, evolved for one interaction period, in an asymptotic state. We illustrate the results on a truncated Jaynes-Cummings model.
description: Open access at http://www.mdpi.com/2227-7390/3/1/92
A new approach to the Kasami codes of type 2
Creators: name: Shi, Minjia
name: Krotov, Denis
name: Solé, Patrick
Publisher: name: arXiv
Year: 2018
Subjects: subject: Information Theory (cs.IT)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 05E30, 94B05

description: The dual of the Kasami code of length $q^2-1$, with $q$ a power of $2$, is constructed by concatenating a cyclic MDS code of length $q+1$ over $F_q$ with a Simplex code of length $q-1$. This yields a new derivation of the weight distribution of the Kasami code, a new description of its coset graph, and a new proof that the Kasami code is completely regular. The automorphism groups of the Kasami code and the related $q$-ary MDS code are determined. New cyclic completely regular codes over finite fields a power of $2$, generalized Kasami codes, are constructed; they have coset graphs isomorphic to that of the Kasami codes. Another wide class of completely regular codes, including additive codes, as well as unrestricted codes, is obtained by combining cosets of the Kasami or generalized Kasami code.
description: Revised version. The automorphism-group part essentially updated (in the previous versions, it contained incorrect results)
Agnetina den
Creators: name: Li, Weihai
name: Wang, Guoquan
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Agnetina
Agnetina den

description: Agnetina den Cao & Bae, 2006
 Agnetina den Cao & Bae, 2006. Entomological Research. 36: 45. Type locality: Pu Mat National Park (Ban Diem), Nghe An Province, Vietnam.
 Material examined. 1 male, Vietnam: Guang Nam Province, Phuocson, Phuemy, 559 m, 2012. V. 5, W.H. Li.
 Distribution. Central Vietnam (Nghe An, Guang Nam).
 Remarks. the species may be recognized by the general dark color pattern and patterned pronotum and legs, abdominal terga 7–8 with submedian patches of sensilla basiconica, and hemitergites with a cluster of long, dense fine setae on their inner sides.
Our specimen agrees well with the descriptions and figures of Cao & Bae (2006), especially with the detailed color pattern and general shape of the terminalia. However, the patches of sensilla basiconica of terga 7–8 and the diagnostic cluster of long fine setae of hemitergites are not as prominent as originally illustrated (Figs. 5–6 in Cao & Bae 2006).
description: Published as part of Li, Weihai & Wang, Guoquan, 2012, A synopsis of Agnetina (Plecoptera: Perlidae) from Vietnam, pp. 84-88 in Zootaxa 3526 on page 87, DOI: 10.5281/zenodo.282749
Relative double commutants in coronas of separable C*-algebras
Creators: name: Kucerovsky, Dan
name: Mathieu, Martin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46L05, 47L40

description: We prove a double commutant theorem for separable subalgebras of a wide class of corona C*-algebras, largely resolving a problem posed by Pedersen. Double commutant theorems originated with von Neumann, whose seminal result evolved into an entire field now called von Neumann algebra theory. Voiculescu later proved a C*-algebraic double commutant theorem for subalgebras of the Calkin algebra. We prove a similar result for subalgebras of a much more general class of so-called corona C*-algebras.
Pictures of KK-theory for real C*-algebras and almost commuting matrices
Creators: name: Boersema, Jeffrey L.
name: Loring, Terry A.
name: Ruiz, Efren
Publisher: name: arXiv
Year: 2012
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L05, 46L80, 46L87

description: We give a systematic account of the various pictures of KK-theory for real C*-algebras, proving natural isomorphisms between the groups that arise from each picture. As part of this project, we develop the universal properties of KK-theory, and we use CRT-structures to prove that a natural transformation from F(A) to G(A) between homotopy equivalent, stable, half-exact functors defined on real C*-algebras is an isomorphism provided it is an isomorphism on the smaller class of C*-algebras. Finally, we develop E-theory for real C*-algebras and use that to obtain new negative results regarding the problem of approximating almost commuting real matrices by exactly commuting real matrices.
description: Version 1: 31 pages. arXiv admin note: text overlap with arXiv:0909.0972 . Version 2: Shorten the paper to 21 pages. Added a section on unitary representations of KO-classes
Ausstellungskataloge und Museumsberichte
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 1 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Pedersen ideals of tensor products of nonunital C*-algebras
Creators: name: Ivanescu, C.
name: Kučerovský, Dan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46A32, 46L06

description: We show that positive elements of a Pedersen ideal of a tensor product can be approximated in a particularly strong sense by sums of tensor products of positive elements. This has a range of applications to the structure of tracial cones and related topics, such as the Cuntz-Pedersen space or the Cuntz semigroup. For example, we determine the cone of lower semicontinuous traces of a tensor product in terms of the traces of the tensor factors, in an arbitrary C*-tensor norm. We show that the positive elements of a Pedersen ideal are sometimes stable under Cuntz equivalence. We generalize a result of Pedersen's by showing that certain classes of completely positive maps take a Pedersen ideal into a Pedersen ideal. We provide theorems that in many cases compute the Cuntz semigroup of a tensor product.
description: circulated as preprint 2017-
Blood pressure percentiles by age and body mass index for adults
Creators: name: Hosseini, Mostafa
name: Baikpour, Masoud
name: Yousefifard, Mahmoud
name: Fayaz, Mohammad
name: Koohpayehzadeh, Jalil
name: Ghelichkhani, Parisa
name: Asady, Hadi
name: Asgari, Fereshteh
name: Etemad, Koorosh
name: Rafei, Ali
name: Gouya, Mohammad Mehdi
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2015
Subjects: blood pressure percentile
age
body mass index
nomograms
adults

description: Since no comprehensive study has been conducted on blood pressure (BP) percentiles established upon nationally representative sample population of adults, the present study aimed to construct the blood pressure percentiles by age, sex and body mass index (BMI) of the subjects. Analyses were based on data collected in 2011 from 8,425 adults aged 25 to 69 years old. Data on demographic characteristics, anthropometric measurements, and blood pressure was recorded for each subject. Linear Regression analysis was used to assess the adjusted relationship of age-sex-specific standard deviation scores of BMI, height, and weight with blood pressure. Four separate models for systolic blood pressure (SBP) and diastolic blood pressure (DBP) of men and women were constructed for BP percentiles according to age and BMI. Blood pressure increased with the rise in BMI and weight, but showed a negative correlation with height. SBP and DBP rose steadily with increasing age, but the rise in SBP was greater than DBP. Overweight and obese population, seem to fall into the category of hypertensive. The findings of present study show that BP percentiles are steadily increased by age and BMI. In addition, most obese or overweight adults are hypertensive.
description: EXCLI Journal; 14:Doc465; ISSN 1611-2156
Multiple planets or exomoons in Kepler hot Jupiter systems with transit timing variations?
Creators: name: Szabó, R.
name: Szabó, Gy. M.
name: Dálya, G.
name: Simon, A. E.
name: Hodosán, G.
name: Kiss, L. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Aims. Hot Jupiters are thought to belong to single-planet systems. Somewhat surprisingly, some hot Jupiters have been reported to exhibit transit timing variations (TTVs). The aim of this paper is to identify the origin of these observations, identify possible periodic biases leading to false TTV detections, and refine the sample to a few candidates with likely dynamical TTVs. Methods. We present TTV frequencies and amplitudes of hot Jupiters in Kepler Q0--6 data with Fourier analysis and a frequency-dependent bootstrap calculation to assess the false alarm probability levels of the detections. Results. We identified 36 systems with TTV above four standard deviation confidence, about half of them exhibiting multiple TTV frequencies. Fifteen of these objects (HAT-P-7b, KOI-13, 127, 183, 188, 190, 196, 225, 254, 428, 607, 609, 684, 774, 1176) probably show TTVs due to a systematic observational effect: long cadence data sampling is regularly shifted transit-by-transit, interacting with the transit light curves, introducing a periodic bias, and leading to a stroboscopic period. For other systems, the activity and rotation of the host star can modulate light curves and explain the observed TTVs. By excluding the systems that were inadequately sampled, showed TTV periods related to the stellar rotation, or turned out to be false positives or suspects, we ended up with seven systems. Three of them (KOI-186, 897, 977) show the weakest stellar rotation features, and these are our best candidates for dynamically induced TTV variations. Conclusions. Those systems with periodic TTVs that we cannot explain with systematics from observation, stellar rotation, activity, or inadequate sampling may be multiple systems or even exomoon hosts.
description: Accepted in Astronomy & Astrophysics
Agnetina jarai Stark & Sivec 1991
Creators: name: Li, Weihai
name: Wang, Guoquan
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Agnetina
Agnetina jarai

description: Agnetina jarai Stark & Sivec, 1991
 Agnetina jarai Stark & Sivec, 1991. Aquatic Insects. 13: 154. Type locality: Kontum Province, Vietnam.
 Distribution. Vietnam (Kontum).
 Remarks. The species was well described and illustrated by Stark & Sivec (1991). It seems that the absence of distinctive pigment pattern on the pronotum and legs could be diagnostic in Vietnamese species as it is similar to the other two species with a reduced lobe on tergum 5 and absence of a lobe on tergum 6.
description: Published as part of Li, Weihai & Wang, Guoquan, 2012, A synopsis of Agnetina (Plecoptera: Perlidae) from Vietnam, pp. 84-88 in Zootaxa 3526 on page 87, DOI: 10.5281/zenodo.282749
Mind the Gap: Trade-Offs between Distributed Ledger Technology Characteristics
Creators: name: Kannengießer, Niclas
name: Lins, Sebastian
name: Dehling, Tobias
name: Sunyaev, Ali
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cryptography and Security (cs.CR)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: K.5.1; D.2.2

description: When developing peer-to-peer applications on Distributed Ledger Technology (DLT), a crucial decision is the selection of a suitable DLT design (e.g., Ethereum) because it is hard to change the underlying DLT design post hoc. To facilitate the selection of suitable DLT designs, we review DLT characteristics and identify trade-offs between them. Furthermore, we assess how DLT designs account for these trade-offs and we develop archetypes for DLT designs that cater to specific quality requirements. The main purpose of our article is to introduce scientific and practical audiences to the intricacies of DLT designs and to support development of viable applications on DLT.
Odd-even effect of melting finite polymer film on square lattice
Creators: name: Si, Tieyan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Two dimensional film system bears many exotic thermodynamics behaviors. We proposed a mathematical physics model to explore how the melting temperature of a two dimensional mathematical dimer film depends on the odd-eveness of the finite width of dimer film. A weak external bond between dimers is introduced into the classical dimer model in this dimer film. We derived a general equation of melting temperature and applied it for computing the melting temperature of a dimer film covering a finite square lattice. The melting temperature is proportional to the external bonding energy that we assume it binds neighboring dimers together and proportional to the inverse of entropy per site. Further more, it shows fusing two small rectangular dimer film with odd number of length into one big rectangular film gains more entropy than fusing two small rectangles with even number of length into the same big rectangle. Fusing two small toruses with even number of length into one big torus reduces entropy. Fusing two small toruses with odd number of length increases the entropy. Thus two dimer films with even number of length repel each other, two dimer films with odd length attract each other. The odd-even effect is also reflected on the correlation function of two topologically distinguishable loops in a torus surface. The entropy of finite system dominates odd-even effect. This model has straightforward extension to longer polymers and three dimensional systems.
description: 10 pages in two column, 15 figures in Int. J. Mod. Phys. B 2015
The influence of geometry and topology of quantum graphs on their nonlinear-optical properties
Creators: name: Lytel, Rick
name: Shafei, Shoresh
name: Smith, Julian H.
name: Kuzyk, Mark G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the nonlinear optics of quasi one-dimensional quantum graphs and manipulate their topology and geometry to generate for the first time nonlinearities in a simple system approaching the fundamental limits of the first and second hyperpolarizabilities. Changes in geometry result in smooth variations of the nonlinearities. Topological changes between geometrically-similar systems cause profound changes in the nonlinear susceptibilities that include a discontinuity due to abrupt changes in the boundary conditions. This work may inform the design of new molecules or nano- scale structures for nonlinear optics and hints at the same universal behavior for quantum graph models in nonlinear optics that is observed in other systems.
description: For better quality plots, please download the paper from the authors' website or from pra.aps.org
An Exceptional Collection For Khovanov Homology
Creators: name: Cooper, Benjamin
name: Hogancamp, Matt
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Algebra (math.QA)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: The Temperley-Lieb algebra is a fundamental component of SU(2) topological quantum field theories. We construct chain complexes corresponding to minimal idempotents in the Temperley-Lieb algebra. Our results apply to the framework which determines Khovanov homology. Consequences of our work include semi-orthogonal decompositions of categorifications of Temperley-Lieb algebras and Postnikov decompositions of all Khovanov tangle invariants.
Liouville type theorems and Hessian estimates for special Lagrangian equations
Creators: name: Ding, Qi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we get a Liouville type theorem for the special Lagrangian equation with a certain 'convexity' condition, where Warren-Yuan first studied the condition in [30]. Based on Warren-Yuan's work, our strategy is to show a global Hessian estimate of solutions via the Neumann-Poincar$\mathrm{\acute{e}}$ inequality on special Lagrangian graphs, and mean value inequality for superharmonic functions on these graphs, where we need geometric measure theory. Moreover, we derive interior Hessian estimates on the gradient of the solutions to the equation with this 'convexity' condition or with supercritical phase.
description: All comments are welcome
Convergence properties of pseudo-marginal Markov chain Monte Carlo algorithms
Creators: name: Andrieu, Christophe
name: Vihola, Matti
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Computation (stat.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We study convergence properties of pseudo-marginal Markov chain Monte Carlo algorithms (Andrieu and Roberts [Ann. Statist. 37 (2009) 697-725]). We find that the asymptotic variance of the pseudo-marginal algorithm is always at least as large as that of the marginal algorithm. We show that if the marginal chain admits a (right) spectral gap and the weights (normalised estimates of the target density) are uniformly bounded, then the pseudo-marginal chain has a spectral gap. In many cases, a similar result holds for the absolute spectral gap, which is equivalent to geometric ergodicity. We consider also unbounded weight distributions and recover polynomial convergence rates in more specific cases, when the marginal algorithm is uniformly ergodic or an independent Metropolis-Hastings or a random-walk Metropolis targeting a super-exponential density with regular contours. Our results on geometric and polynomial convergence rates imply central limit theorems. We also prove that under general conditions, the asymptotic variance of the pseudo-marginal algorithm converges to the asymptotic variance of the marginal algorithm if the accuracy of the estimators is increased.
description: Published at http://dx.doi.org/10.1214/14-AAP1022 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The number of distinct distances from a vertex of a convex polygon
Creators: name: Nivasch, Gabriel
name: Pach, János
name: Pinchasi, Rom
name: Zerbib, Shira
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Geometry (cs.CG)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences
subject: 68U05, 52C10

description: Erdős conjectured in 1946 that every n-point set P in convex position in the plane contains a point that determines at least floor(n/2) distinct distances to the other points of P. The best known lower bound due to Dumitrescu (2006) is 13n/36 - O(1). In the present note, we slightly improve on this result to (13/36 + eps)n - O(1) for eps ~= 1/23000. Our main ingredient is an improved bound on the maximum number of isosceles triangles determined by P.
description: 11 pages, 4 figures
Simplicial Chern-Weil theory for coherent analytic sheaves, part I
Creators: name: Hosgood, Timothy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 32C35 (Primary), 14F40, 14F08 (Secondary)

description: In "Chern classes for coherent sheaves", H.I. Green constructs Chern classes in de Rham cohomology of coherent analytic sheaves. We construct here a formal $(\infty,1)$-categorical framework into which we can place Green's work and generalise it, also obtaining a better idea as to what exactly a simplicial connection should be. The result will be the ability to work with generalised invariant polynomials (which will be introduced in the sequel to this paper) evaluated at the curvature of so-called admissible simplicial connections to get explicit Čech representatives in de Rham cohomology of characteristic classes of coherent analytic sheaves.
description: final version (theorem numbering changed from previous versions), appears in Bulletin de la Soci\'et\'e Math\'ematique de France
RAQAMLI TEXNOLOGIYALAR VOSITASIDA TASHQI SAVDONI RIVOJLANTIRISH MASALALARI
Creators: name: Toshkent viloyati, Toshkent shahr, Bank-Moliya akademiyasi tayanch  doktoranti Masharipova Durdona Ulugbekovna
Publisher: name: Zenodo
Year: 2024

description:  

Annotatsiya. Mazkur maqolada raqamli texnologiyalar yordamida tashqi savdoni rivojlantirish masalalari ko‘rib chiqiladi. Asosan elektron savdo platformalarining ahamiyati, ma'lumotlar tahlili va sun'iy intellekt imkoniyatlari, raqamli hujjatlar aylanishi va blokcheyn texnologiyalarining tashqi savdoda qo‘llanilishi muhokama etiladi. Shuningdek, fintech va raqamli to‘lov tizimlari orqali xalqaro savdoni qulaylashtirishning dolzarb jihatlari ham yoritib beriladi. Raqamli texnologiyalar xalqaro bozorlarda savdo jarayonlarini optimallashtirish va xavfsizligini oshirishda muhim omil sifatida qaraladi.

Kalit so‘zlar; raqamli texnologiyalar, tashqi savdo, elektron savdo, ma'lumotlar tahlili, sun'iy intellekt, blokcheyn, raqamli hujjatlar, fintech, xalqaro to‘lovlar;
Agnetina
Creators: name: Li, Weihai
name: Wang, Guoquan
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Agnetina

description: Key to males of species of Agnetina from Vietnam
1. Pronotum and legs with distinctive pattern (Figs. 1 & 4; Figs. 3–4 in Cao & Bae 2006).............................. 2
 –. Pronotum and legs lack a distinctive pattern............................................................ A. jarai
 2. Tergum 5 with posteromedian lobes covered by sensilla basiconica, hemitergites lacking proximal triangular lobe, but with a cluster of long fine setae along dorsal margins (Figs. 5–6 in Cao & Bae 2006)................................. A. den
 –. Tergum 5 with indistinct posteromedian lobes covered by hairs, hemitergites with proximal triangular lower lobe, and lacking fringe of long fine setae on dorsal margin (Figs. 5–6 & 7–9).......................................... A. vietnamica
description: Published as part of Li, Weihai & Wang, Guoquan, 2012, A synopsis of Agnetina (Plecoptera: Perlidae) from Vietnam, pp. 84-88 in Zootaxa 3526 on page 87, DOI: 10.5281/zenodo.282749
Strong oracle optimality of folded concave penalized estimation
Creators: name: Fan, Jianqing
name: Xue, Lingzhou
name: Zou, Hui
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistics Theory (math.ST)
subject: Computation (stat.CO)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Folded concave penalization methods have been shown to enjoy the strong oracle property for high-dimensional sparse estimation. However, a folded concave penalization problem usually has multiple local solutions and the oracle property is established only for one of the unknown local solutions. A challenging fundamental issue still remains that it is not clear whether the local optimum computed by a given optimization algorithm possesses those nice theoretical properties. To close this important theoretical gap in over a decade, we provide a unified theory to show explicitly how to obtain the oracle solution via the local linear approximation algorithm. For a folded concave penalized estimation problem, we show that as long as the problem is localizable and the oracle estimator is well behaved, we can obtain the oracle estimator by using the one-step local linear approximation. In addition, once the oracle estimator is obtained, the local linear approximation algorithm converges, namely it produces the same estimator in the next iteration. The general theory is demonstrated by using four classical sparse estimation problems, that is, sparse linear regression, sparse logistic regression, sparse precision matrix estimation and sparse quantile regression.
description: Published in at http://dx.doi.org/10.1214/13-AOS1198 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org). With Corrections
Simplicial Chern-Weil theory for coherent analytic sheaves, part II
Creators: name: Hosgood, Timothy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In the previous part of this diptych, we defined the notion of an admissible simplicial connection, as well as explaining how H.I. Green constructed a resolution of coherent analytic sheaves by locally free sheaves on the Čech nerve. This paper seeks to apply these abstract formalisms, by showing that Green's barycentric simplicial connection is indeed admissible, and that this condition is exactly what we need in order to be able to apply Chern-Weil theory and construct characteristic classes. We show that, in the case of (global) vector bundles, the simplicial construction agrees with what one might construct manually: the explicit Čech representatives of the exponential Atiyah classes of a vector bundle agree. Finally, we summarise how all the preceding theory fits together to allow us to define Chern classes of coherent analytic sheaves, as well as showing uniqueness in the compact case.
description: final version, appears in manuscripta mathematica (2023)
Embedded model discrepancy: A case study of Zika modeling
Creators: name: Morrison, Rebecca E.
name: Cunha, Americo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Mathematical models of epidemiological systems enable investigation of and predictions about potential disease outbreaks. However, commonly used models are often highly simplified representations of incredibly complex systems. Because of these simplifications, the model output, of say new cases of a disease over time, or when an epidemic will occur, may be inconsistent with available data. In this case, we must improve the model, especially if we plan to make decisions based on it that could affect human health and safety, but direct improvements are often beyond our reach. In this work, we explore this problem through a case study of the Zika outbreak in Brazil in 2016. We propose an embedded discrepancy operator---a modification to the model equations that requires modest information about the system and is calibrated by all relevant data. We show that the new enriched model demonstrates greatly increased consistency with real data. Moreover, the method is general enough to easily apply to many other mathematical models in epidemiology.
description: 9 pages, 7 figures
Local symmetries in one-dimensional quantum scattering
Creators: name: Kalozoumis, P. A.
name: Morfonios, C.
name: Diakonos, F. K.
name: Schmelcher, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We introduce the concept of parity symmetry in restricted spatial domains -- local parity -- and explore its impact on the stationary transport properties of generic, one-dimensional aperiodic potentials of compact support. It is shown that, in each domain of local parity symmetry of the potential, there exists an invariant quantity in the form of a non-local current, in addition to the globally invariant probability current. For symmetrically incoming states, both invariant currents vanish if weak commutation of the total local parity operator with the Hamiltonian is established, leading to local parity eigenstates. For asymmetrically incoming states which resonate within locally symmetric potential units, the complete local parity symmetry of the probability density is shown to be necessary and sufficient for the occurrence of perfect transmission. We connect the presence of local parity symmetries on different spatial scales to the occurrence of multiple perfectly transmitting resonances and propose a construction scheme for the design of resonant transparent aperiodic potentials. Our findings are illustrated through application to the analytically tractable case of piecewise constant potentials.
description: 10 pages, 7 figures
Large free sets in universal algebras
Creators: name: Banakh, Taras
name: Bartoszewicz, Artur
name: Głab, Szymon
Publisher: name: arXiv
Year: 2012
Subjects: subject: Logic (math.LO)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 05B35, 08A99, 17A50

description: We prove that for each universal algebra $(A,\mathcal A)$ of cardinality $|A|\ge 2$ and an infinite set $X$ of cardinality $|X|\ge|\mathcal A|$, the $X$-th power $(A^X,\mathcal A^X)$ of the algebra $(A,\mathcal A)$ contains a free subset $\mathcal F\subset A^X$ of cardinality $|\mathcal F|=2^{|X|}$. This generalizes the classical Fichtenholtz-Kantorovitch-Hausdorff result on the existence of an independent family $\mathcal I\subset\mathcal P(X)$ of cardinality $|\mathcal I|=|\mathcal P(X)|$ in the Boolean algebra $\mathcal P(X)$ of subsets of an infinite set $X$.
description: 4 pages
The spectrum of a localic semiring
Creators: name: Manuell, Graham
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: Category Theory (math.CT)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54B35 (Primary) 06D22, 54H13, 13J99, 54B30, 13A15, 06F07, 03F65

description: A number of spectrum constructions have been devised to extract topological spaces from algebraic data. Prominent examples include the Zariski spectrum of a commutative ring, the Stone spectrum of a bounded distributive lattice, the Gelfand spectrum of a commutative unital C*-algebra and the Hofmann-Lawson spectrum of a continuous frame. Inspired by the examples above, we define a spectrum for localic semirings. We use arguments in the symmetric monoidal category of suplattices to prove that, under conditions satisfied by the aforementioned examples, the spectrum can be constructed as the frame of overt weakly closed radical ideals and that it reduces to the usual constructions in those cases. Our proofs are constructive. Our approach actually gives 'quantalic' spectrum from which the more familiar localic spectrum can then be derived. For a discrete ring this yields the quantale of ideals and in general should contain additional 'differential' information about the semiring.
description: 22 pages
Can relativistic bit commitment lead to secure quantum oblivious transfer?
Creators: name: He, Guang Ping
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: While unconditionally secure bit commitment (BC) is considered impossible within the quantum framework, it can be obtained under relativistic or experimental constraints. Here we study whether such BC can lead to secure quantum oblivious transfer (QOT). The answer is not completely negative. On one hand, we provide a detailed cheating strategy, showing that the "honest-but-curious adversaries" in some of the existing no-go proofs on QOT still apply even if secure BC is used, enabling the receiver to increase the average reliability of the decoded value of the transferred bit. On the other hand, it is also found that some other no-go proofs claiming that a dishonest receiver can always decode all transferred bits simultaneously with reliability 100% become invalid in this scenario, because their models of cryptographic protocols are too ideal to cover such a BC-based QOT.
description: Published version. This paper generalized some results in Sec. V of arXiv:1101.4587, and pointed out the limitation of the proof in arXiv:quant-ph/9611031
Tafeln
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 14 Nr. 12 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Reflection Groups and Rigidity of Quadratic Poisson Algebras
Creators: name: Gaddis, Jason
name: Veerapen, Padmini
name: Wang, Xingting
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B63, 16W25, 14R10

description: In this paper, we study the invariant theory of quadratic Poisson algebras. Let G be a finite group of the graded Poisson automorphisms of a quadratic Poisson algebra A. When the Poisson bracket of A is skew-symmetric, a Poisson version of the Shephard-Todd-Chevalley theorem is proved stating that the fixed Poisson subring A^G is skew-symmetric if and only if G is generated by reflections. For many other well-known families of quadratic Poisson algebras, we show that G contains limited or even no reflections. This kind of Poisson rigidity result ensures that the corresponding fixed Poisson subring A^G is not isomorphic to A as Poisson algebras unless G is trivial.
description: Small revisions throughout. Remark 4.13 added courtesy of Akaki Tikaradze
Homotopy transfer and rational models for mapping spaces
Creators: name: Buijs, Urtzi
name: Gutiérrez, Javier J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55P62 (Primary), 54C35 (Secondary)

description: By using homotopy transfer techniques in the context of rational homotopy theory, we show that if $C$ is a coalgebra model of a space $X$, then the $A_\infty$-coalgebra structure in $H_*(X;\mathbb{Q})\cong H_*(C)$ induced by the higher Massey coproducts provides the construction of the Quillen minimal model of $X$. We also describe an explicit $L_\infty$-structure on the complex of linear maps ${\rm Hom}(H_*(X; \mathbb{Q}), π_*(ΩY)\otimes\mathbb{Q})$, where $X$ is a finite nilpotent CW-complex and $Y$ is a nilpotent CW-complex of finite type, modeling the rational homotopy type of the mapping space ${\rm map}(X, Y)$. As an application we give conditions on the source and target in order to detect rational $H$-space structures on the components.
description: 21 pages. Final version. To appear in J. Homotopy Relat. Struct
Boundary Components of Mumford-Tate Domains
Creators: name: Kerr, Matt
name: Pearlstein, Gregory
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 14D07, 14M17, 17B45, 20G99, 32M10, 32G20

description: We study certain spaces of nilpotent orbits in Hodge domains, and treat a number of examples. More precisely, we compute the Mumford-Tate group of the limit mixed Hodge structure of a generic such orbit. The result is used to present these spaces as iteratively fibered algebraic-group orbits in a minimal way. We conclude with two applications to variations of Hodge structure.
description: 58 pages, 22 figures; final version, to appear in Duke Math. J.; section 6 substantially expanded
Every bordered Riemann surface is a complete proper curve in a ball
Creators: name: Alarcon, Antonio
name: Forstneric, Franc
Publisher: name: arXiv
Year: 2012
Subjects: subject: Complex Variables (math.CV)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 32B15, 32H02, 14H50, 53C42

description: We prove that every bordered Riemann surface admits a complete proper holomorphic immersion into a ball of C^2, and a complete proper holomorphic embedding into a ball of C^3.
description: Math. Ann., in press
Effective action for higher spin fields on (A)dS backgrounds
Creators: name: Bastianelli, Fiorenzo
name: Bonezzi, Roberto
name: Corradini, Olindo
name: Latini, Emanuele
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the one loop effective action for a class of higher spin fields by using a first-quantized description. The latter is obtained by considering spinning particles, characterized by an extended local supersymmetry on the worldline, that can propagate consistently on conformally flat spaces. The gauge fixing procedure for calculating the worldline path integral on a loop is delicate, as the gauge algebra contains nontrivial structure functions. Restricting the analysis on (A)dS backgrounds simplifies the gauge fixing procedure, and allows us to produce a useful representation of the one loop effective action. In particular, we extract the first few heat kernel coefficients for arbitrary even spacetime dimension D and for spin S identified by a curvature tensor with the symmetries of a rectangular Young tableau of D/2 rows and [S] columns.
description: 30 pages, typos corrected
A Performance Evaluation And Self-Assessment Of Potential As A Clinical Educator
Creators: name: MOHAMMAD QASEM
Publisher: name: Zenodo
Year: 2013
Subjects: Physiotherapy
Clinical Educator

description: Education is one of the most rewarding, and most challenging professional endeavours one can take. Becoming an effective clinical educator requires a diverse set of skills, a strong theoretical background, and a continual willingness to grow and adapt to new situations (Andrews et al., 2006). Teaching clinical skills requires a unique understanding of not only classic educational theory and curriculum design, but interpersonal relationships and understanding learner needs as well (Rust et al., 2005).

            The purpose of this essay is to highlight the importance of self-evaluation and assessment on the clinical educator. First, discussion focuses on the qualities and characteristics of a clinical educator. Issues related to planning and facilitating the learning process effectively are then presented, followed by a description of skills needed to effectively assess the learner. Discussion then focuses on methods of evaluating the learning experience. In each of these areas, we will cite current literature in the physiotherapy field and reflect on my experience with each topic. This essay concludes with a brief summary and outline of key points.
Fermionic current from topology and boundaries with applications to higher-dimensional models and nanophysics
Creators: name: Bellucci, S.
name: Saharian, A. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate combined effects of topology and boundaries on the vacuum expectation value (VEV) of the fermionic current in the space with an arbitrary number of toroidally compactified dimensions. As a geometry of boundaries we consider two parallel plates on which the fermion field obeys bag boundary conditions. Along the compact dimensions, periodicity conditions are imposed with arbitrary phases. In addition, the presence of a constant gauge field is assumed. The nontrivial topology gives rise to an Aharonov-Bohm effect for the fermionic current induced by the gauge field. It is shown that the VEV of the charge density vanishes and the current density has nonzero expectation values for the components along compact dimensions only. The latter are periodic odd functions of the magnetic flux with the period equal to the flux quantum. In the region between the plates, the VEV of the fermionic current is decomposed into pure topological, single plate and interference parts. For a massless field the single plate part vanishes and the interference part is distributed uniformly. The corresponding results are generalized for conformally-flat spacetimes. Applications of the general formulas to finite-length carbon nanotubes are given within the framework of the Dirac model for quasiparticles in graphene. In the absence of the magnetic flux, two sublattices of the honeycomb graphene lattice yield opposite contributions and the fermionic current vanishes. A magnetic flux through the cross section of the nanotube breaks the symmetry allowing the current to flow along the compact dimension.
description: 22 pages, 5 figures
Real-space imaging of acoustic plasmons in large-area CVD graphene
Creators: name: Menabde, Sergey G.
name: Lee, In-Ho
name: Lee, Sanghyub
name: Ha, Heonhak
name: Heiden, Jacob T.
name: Yoo, Daehan
name: Kim, Teun-Teun
name: Lee, Young Hee
name: Low, Tony
name: Oh, Sang-Hyun
name: Jang, Min Seok
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: An acoustic plasmonic mode in a graphene-dielectric-metal heterostructure has recently been spotlighted as a superior platform for strong light-matter interaction. It originates from the coupling of graphene plasmon with its mirror image and exhibits the largest field confinement in the limit of a nm-thick dielectric. Although recently detected in the far-field regime, optical near-fields of this mode are yet to be observed and characterized. Direct optical probing of the plasmonic fields reflected by the edges of graphene via near-field scattering microscope reveals a relatively small damping rate of the mid-IR acoustic plasmons in our devices, which allows for their real-space mapping even with unprotected, chemically grown, large-area graphene at ambient conditions. We show an acoustic mode that is twice as confined - yet 1.4 times less damped - compared to the graphene surface plasmon under similar conditions. We also image the resonant acoustic Bloch state in a 1D array of gold nanoribbons responsible for the high efficiency of the far-field coupling. Our results highlight the importance of acoustic plasmons as an exceptionally promising platform for large-area graphene-based optoelectronic devices operating in mid-IR.
Anisotropic Elastic Properties of Flexible Metal-Organic Frameworks: How Soft are Soft Porous Crystals?
Creators: name: Ortiz, Aurélie U.
name: Boutin, Anne
name: Fuchs, Alain H.
name: Coudert, François-Xavier
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We performed ab initio calculations of the elastic constants of five flexible metal-organic frameworks: MIL-53(Al), MIL-53(Ga), MIL-47 and the square and lozenge structures of DMOF-1. Tensorial analysis of the elastic constants reveal a highly anisotropic elastic behavior, some deformation directions exhibiting very low Young's modulus and shear modulus. This anisotropy can reach a 400:1 ratio between the most rigid and weakest directions, in stark contrast with the case of non-flexible MOFs such as MOF-5 and ZIF-8. In addition, we show that flexible MOFs can display extremely large negative linear compressibility (NLC). These results uncover the microscopic roots of stimuli-induced structural transitions in flexible MOFs, by linking the local elastic behavior of the material and its multistability.
Nonlinearity-induced photonic topological insulator
Creators: name: Maczewsky, Lukas J.
name: Heinrich, Matthias
name: Kremer, Mark
name: Ivanov, Sergey K.
name: Ehrhardt, Max
name: Martinez, Franklin
name: Kartashov, Yaroslav V.
name: Konotop, Vladimir V.
name: Torner, Lluis
name: Bauer, Dieter
name: Szameit, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The hallmark feature of topological insulators renders edge transport virtually impervious to scattering at defects and lattice disorder. In our work, we experimentally demonstrate a topological system, using a photonic platform, in which the very existence of the topological phase is brought about by nonlinearity. Whereas in the linear regime, the lattice structure remains topologically trivial, light beams launched above a certain power threshold drive the system into its transient topological regime, and thereby define a nonlinear unidirectional channel along its edge. Our work studies topological properties of matter in the nonlinear regime, and may pave the way towards compact devices that harness topological features in an on-demand fashion.
Fokker-Planck equation with memory: the crossover from ballistic to diffusive processes in many-particle systems and incompressible media
Creators: name: Ilyin, Valery
name: Procaccia, Itamar
name: Zagorodny, Anatoly
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The unified description of diffusion processes that cross over from a ballistic behavior at short times to normal or anomalous diffusion (sub- or superdiffusion) at longer times is constructed on the basis of a non-Markovian generalization of the Fokker-Planck equation. The necessary non-Markovian kinetic coefficients are determined by the observable quantities (mean- and mean square displacements). Solutions of the non-Markovian equation describing diffusive processes in the physical space are obtained. For long times, these solutions agree with the predictions of the continuous random walk theory; they are, however, much superior at shorter times when the effect of the ballistic behavior is crucial.
description: 18 pages, 11 figures
Distributions defined by q-supernomials, fusion products, and Demazure modules
Creators: name: Kousidis, Stavros
name: Schulte-Geers, Ernst
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We prove asymptotic normality of the distributions defined by q-supernomials, which implies asymptotic normality of the distributions given by the central string functions and the basic specialization of fusion modules of the current algebra of sl2. The limit is taken over linearly scaled fusion powers of a fixed collection of irreducible representations. This includes as special instances all Demazure modules of the affine Kac-Moody algebra associated to sl2. Along with an available complementary result on the asymptotic normality of the basic specialization of graded tensors of the type A standard representation, our result is a central limit theorem for a serious class of graded tensors. It therefore serves as an indication towards universal behavior: The central string functions and the basic specialization of fusion and, in particular, Demazure modules behave asymptotically normal, as the number of fusions scale linearly in an asymptotic parameter, N say.
description: 26 pages, reorganized, shorter, typos
Robert Schmidt † 6. Oktober 1952
Creators: name: Meyer, Erich
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 5 Nr. 12 (1952): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege