cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum Diffusion and Eigenfunction Delocalization in a Random Band Matrix Model
Creators: name: Erdos, Laszlo
name: Knowles, Antti
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 15B52, 82B44, 82C44

description: We consider Hermitian and symmetric random band matrices $H$ in $d \geq 1$ dimensions. The matrix elements $H_{xy}$, indexed by $x,y \in Λ\subset \Z^d$, are independent, uniformly distributed random variables if $\abs{x-y}$ is less than the band width $W$, and zero otherwise. We prove that the time evolution of a quantum particle subject to the Hamiltonian $H$ is diffusive on time scales $t\ll W^{d/3}$. We also show that the localization length of an arbitrarily large majority of the eigenvectors is larger than a factor $W^{d/6}$ times the band width. All results are uniform in the size $\absΛ$ of the matrix.
description: Minor corrections, Sections 4 and 11 updated
Economics of integrating computers and communications systems in Canada
Creators: name: Touchie, Rodger Don
Publisher: name: University of British Columbia
Year: 2011

description: The success of the computer utility is extremely dependent upon the efficient interaction of electronic data processing equipment with high speed communication circuits. It is the purpose of this thesis to identify and examine some of the problem areas of a new and rapidly expanding industry. Emphasis is placed on the Canadian environment. However, the obvious influences of the related activities in the United States, are not to be neglected thus, the study includes numerous references to the American situation. This is not a report on computer capabilities, nor a technical analysis of the computer-communications interface. Rather, this study deals with the overlapping concerns of the computer and communications industries, and the implications of these mutual interests. Major issues are the economic considerations, government involvement and the examination of social effects. The paper consists of four main sections. The first of these is a general introduction, including a brief summary of data communication terminology. The second section concentrates upon the present Canadian situation and serves to describe the current state of teleprocessing in this country. Also, it involves a survey of the present services provided by the common carriers and the available interface equipment which developers of a computer utility might employ. One of the traits of common carrier services is regulation and this implies government involvement. Pertinent jurisdictions of both federal and provincial government bodies is described. It is felt, that within this realm, extensive reference to the actions of the Federal Communications Commission in the United States is warranted. It's pertinence to the Canadian scene will be brought directly into Section Two, and this is supplemented by Appendix B which describes some of the relevant occurrences in the United States as stimulated by the FCC. One prime undertaking serves to tie these economic, political and social factors together. As a result the thesis includes a review of progress towards a Canadian telecommunications satellite and what it might mean to cross country computer interactions in the future. Section Three looks at some of the management problems which are a part of data communication systems development. The generalities which are characteristic of any development recipe are applied to a specific case study. A study of this type leads to opinions and conclusions being drawn by the author and these are outlined in Section Four of the thesis.
Colour Gradients and the Colour-Magnitude Relation: Different Properties of Brightest Cluster Galaxies and E/S0 Galaxies in the Sloan Digital Sky Survey
Creators: name: Roche, Nathan
name: Bernardi, Mariangela
name: Hyde, Joseph
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We examine the colour-magnitude relation of approximately 5000 Brightest Cluster Galaxies (BCGs) in the Sloan Digital Sky Survey, and compare with non-BCG E/S0 galaxies. The colour-magnitude and colour-sigma (velocity dispersion) relations are flatter in slope (by a factor of about 2) for BCGs than for non-BCG E/S0s, and the BCGs also tend to be redder by 0.01 magnitudes in g-r. We investigate radial colour gradients in both samples, using the ratio of the de Vaucouleurs radii in the g and r bands. We find BCGs have significantly flatter (by 23%) mean colour gradients than other high luminosity E/S0s. In early-type galaxies, the colour gradients are strongest at intermediate luminosities of Mr=-22. Colour gradients in E/S0s increase with radius (up to 10kpc) and are negatively correlated with 10sigma + Mr (velocity dispersion relative to luminosity) and with mass density. The gradients also tend to decrease with increasing stellar age. These trends are weak or not seen in BCGs, in which the mean colour gradient is low whatever the other properties. We discuss possible explanations, which involve a greater amount of dry merging in the formation history of the BCGs.
description: 16 pages, 24 figures, revised, accepted for publication in MNRAS.
Evolving and Sustaining Ocean Best Practices Workshop 15 – 17 November 2017 Intergovernmental Oceanographic Commission, Paris, France: Proceedings.
Creators: name: (:Unkn) Unknown
Publisher: name: AtlantOS/ODIP/OORCN Ocean Best Practices Working Group
Year: 2018
Subjects: subject: Best practices
subject: AtlantOS
subject: ODIP
subject: Parameter Discipline::Administration and dimensions

description: There is an ever-present need for the dissemination and uptake of best practices in the multidisciplinary field of ocean observation. However, the complexity of this domain and the diversity of its stakeholders make discovering relevant ocean best practices (OBP) a considerable challenge. The new paradigms of the information age - onboard processors, large memories, access to the internet and ubiquitous cloud resources opens new and significant opportunities to access and use best practices. Working across disciplines, the requirement for a trusted best practice discovery and access system includes: a web-accessible archive location; appropriate vocabularies or ontologies for improving discovery of best practices; and some means for a scientist or engineer to understand the background, provenance (including any certification) and value of a best practice. Best Practices within the System should cover the full value chain from sensors and platforms to modeling and analysis to data management and users.
El examen como punto de partida: técnicas de visualización y análisis de redes para optimizar el feedback en el aula de ruso como L2
Creators: name: Barros García, Benamí
name: Arroyo-Machado, Wenceslao
Publisher: name: Zenodo
Year: 2020
Subjects: examen
visualización
análisis de redes

description: Presentación realizada en el II Seminario AEPRU "La lengua y la cultura rusas en España: un enfoque multidisciplinar", celebrado el 27 y 28 de febrero de 2020 en Madrid.
Charm-pair Rescattering Mechanism for Charmonium Production in High-energy Collisions
Creators: name: Artoisenet, Pierre
name: Braaten, Eric
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A new mechanism for heavy quarkonium production in high-energy collisions called the "s-channel cut" was proposed in 2005 by Lansberg, Cudell, and Kalinovsky. We identify this mechanism physically as the production of a heavy quark and anti-quark that are on-shell followed by their rescattering to produce heavy quarkonium. We point out that in the NRQCD factorization formalism this rescattering mechanism is a contribution to the color-singlet model term at next-to-next-to-leading order in perturbation theory. Its leading contribution to the production rate can be calculated without introducing any additional phenomenological parameters. We calculate the charm-pair rescattering (or s-channel cut) contribution to the production of J/psi at the Tevatron and compare it to estimates by Lansberg et al. using phenomenological models. This contribution competes with the leading-order term in the color-singlet model at large transverse momentum but is significantly smaller than the next-to-leading-order term. We conclude that charm-pair rescattering is not a dominant mechanism for charmonium production in high-energy collisions.
description: 12 pages, 10 figures
General case of single channel queues
Creators: name: Tan, Thiam Soon
Publisher: name: University of British Columbia
Year: 2011

description: This thesis attempts to evaluate Low's hypothesis that for a single channel, single phase, steady state, infinite queue, the system length depends only on (1) the square of the coefficient of variation of the inter-arrival time distribution, C[formula omitted],(2) the square of the coefficient of variation of the service time distribution, C[formula omitted], and (3) the ratio of mean arrival rate to mean service rate [formula omitted]. In order to support the hypothesis, Low developed a set of curves by using simulation method. However, his simulation model is considered inadequate in representing actual queueing situation. A different simulation model has been employed instead and is used to test the classical queue models as well as the general arbitrary queues. The conclusion has been reached that in spite of the differences between the actual and expected results, the hypothesis is empirically true. Moreover, for any single channel queue with given values of C[formula omitted] and C[formula omitted], the system length L increases exponentially with the utilization factor, regardless of the patterns of arrival and service time distributions. The reader is expected to have a basic knowledge of standard queueing theory and some of its applications.
Freezing into Stripe States in Two-Dimensional Ferromagnets and Crossing Probabilities in Critical Percolation
Creators: name: Barros, Kipton
name: Krapivsky, P. L.
name: Redner, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: When a two-dimensional Ising ferromagnet is quenched from above the critical temperature to zero temperature, the system eventually converges to either a ground state (all spins aligned) or an infinitely long-lived metastable stripe state. By applying results from percolation theory, we analytically determine the probability to reach the stripe state as a function of the aspect ratio and the form of the boundary conditions. These predictions agree with simulation results. Our approach generally applies to coarsening dynamics of non-conserved scalar fields in two dimensions.
description: 4 pages, 4 figures, 2-column revtex4 format; latest revision fixes small typos in some formulae
COSEBIs: Extracting the full E-/B-mode information from cosmic shear correlation functions
Creators: name: Schneider, Peter
name: Eifler, Tim
name: Krause, Elisabeth
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cosmic shear is considered one of the most powerful methods for studying the properties of Dark Energy in the Universe. As a standard method, the two-point correlation functions $xi_\pm(theta)$ of the cosmic shear field are used as statistical measures for the shear field. In order to separate the observed shear into E- and B-modes, the latter being most likely produced by remaining systematics in the data set and/or intrinsic alignment effects, several statistics have been defined before. Here we aim at a complete E-/B-mode decomposition of the cosmic shear information contained in the $xi_\pm$ on a finite angular interval. We construct two sets of such E-/B-mode measures, namely Complete Orthogonal Sets of E-/B-mode Integrals (COSEBIs), characterized by weight functions between the $xi_\pm$ and the COSEBIs which are polynomials in $theta$ or polynomials in $ln(theta)$, respectively. Considering the likelihood in cosmological parameter space, constructed from the COSEBIs, we study their information contents. We show that the information grows with the number of COSEBI modes taken into account, and that an asymptotic limit is reached which defines the maximum available information in the E-mode component of the $xi_\pm$. We show that this limit is reached the earlier (i.e., for a smaller number of modes considered) the narrower the angular range is over which $xi_\pm$ are measured, and it is reached much earlier for logarithmic weight functions. For example, for $xi_\pm$ on the interval $1'\le θ\le 400'$, the asymptotic limit for the parameter pair $(Omega_m, sigma_8)$ is reached for $\sim 25$ modes in the linear case, but already for 5 modes in the logarithmic case. The COSEBIs form a natural discrete set of quantities, which we suggest as method of choice in future cosmic shear likelihood analyses.
description: 17 pages, 12 figures, matches accepted version by A&A
Optimal map of the modular structure of complex networks
Creators: name: Arenas, Alex
name: Borge-Holthoefer, Javier
name: Gomez, Sergio
name: Zamora-Lopez, Gorka
Publisher: name: arXiv
Year: 2009
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Computational Physics (physics.comp-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Modular structure is pervasive in many complex networks of interactions observed in natural, social and technological sciences. Its study sheds light on the relation between the structure and function of complex systems. Generally speaking, modules are islands of highly connected nodes separated by a relatively small number of links. Every module can have contributions of links from any node in the network. The challenge is to disentangle these contributions to understand how the modular structure is built. The main problem is that the analysis of a certain partition into modules involves, in principle, as many data as number of modules times number of nodes. To confront this challenge, here we first define the contribution matrix, the mathematical object containing all the information about the partition of interest, and after, we use a Truncated Singular Value Decomposition to extract the best representation of this matrix in a plane. The analysis of this projection allow us to scrutinize the skeleton of the modular structure, revealing the structure of individual modules and their interrelations.
description: 21 pages, 10 figures
Polynomial-Time Approximation Schemes for Subset-Connectivity Problems in Bounded-Genus Graphs
Creators: name: Borradaile, Glencora
name: Demaine, Erik D.
name: Tazari, Siamak
Publisher: name: arXiv
Year: 2009
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: We present the first polynomial-time approximation schemes (PTASes) for the following subset-connectivity problems in edge-weighted graphs of bounded genus: Steiner tree, low-connectivity survivable-network design, and subset TSP. The schemes run in O(n log n) time for graphs embedded on both orientable and non-orientable surfaces. This work generalizes the PTAS frameworks of Borradaile, Klein, and Mathieu from planar graphs to bounded-genus graphs: any future problems shown to admit the required structure theorem for planar graphs will similarly extend to bounded-genus graphs.
description: Updated version from the conference (STACS) version
Additional file 2: of SOX30 specially prevents Wnt-signaling to suppress metastasis and improve prognosis of lung adenocarcinoma patients
Creators: name: Han, Fei
name: Zhang, Ming-qian
name: Liu, Wen-bin
name: Sun, Lei
name: Hao, Xiang-lin
name: Yin, Li
name: Jiang, Xiao
name: Cao, Jia
name: Liu, Jin-yi
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Cell Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer

description: Figure S1. SOX30 expression has different prognostic values in ADC and SCC. (A) Survival analysis of SOX30 expression in 227 ADC patients split into three groups. Survival analyses were evaluated by Kaplan-Meier survival curve and multivariate Cox regression. HR represents hazard ratio. SOX30 high, scores 8 < and ≤ 12; SOX30 medium, score 8; SOX30 low, scores < 8. (B) Survival analysis of SOX30 expression in 200 SCC patients split into three groups. Survival analyses were evaluated by Kaplan-Meier survival curve and multivariate Cox regression. Figure S2. SOX30 is an early-stage prognostic biomarker for ADC or SCC patients. (A) Survival analysis of SOX30 expression in 112 stage I ADC patients split into three groups. Survival analyses were performed using Kaplan-Meier and Cox regression methods. (B) Survival analysis of SOX30 expression in 75 stage I SCC patients split into three groups. Survival analyses were tested by Kaplan-Meier and Cox regression methods. (DOC 4958 kb)
Representation theory of the stabilizer subgroup of the point at infinity in Diff(S^1)
Creators: name: Tanimoto, Yoh
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81R10 (primary) 22E65 58D05 (secondary)

description: The group Diff(S^1) of the orientation preserving diffeomorphisms of the circle S^1 plays an important role in conformal field theory. We consider a subgroup B_0 of Diff(S^1) whose elements stabilize "the point of infinity". This subgroup is of interest for the actual physical theory living on the punctured circle, or the real line. We investigate the unique central extension K of the Lie algebra of that group. We determine the first and second cohomologies, its ideal structure and the automorphism group. We define a generalization of Verma modules and determine when these representations are irreducible. Its endomorphism semigroup is investigated and some unitary representations of the group which do not extend to Diff(S^1) are constructed.
description: 34 pages, no figure
"In morte di Andrea Appiani pittore" e "In morte di Antonio Canova scultore": versi inediti di Felice Bellotti
Creators: name: Bianchi, Viola
Publisher: name: Prassi Ecdotiche della Modernità Letteraria
Year: 2019
Subjects: Felice Bellotti; Andrea Appiani; Antonio Canova; neoclassicismo; filologia; ecdotica; manoscritto; autografo; Biblioteca Ambrosiana; Milano; Ottocento

description: Il contributo mira a fornire il testo inedito di due poesie d’occasione di Felice Bellotti: In morte di Andrea Appiani pittore e In morte di Antonio Canova scultore. Viene dunque presentato lo studio filologico condotto sugli autografi presso la Veneranda Biblioteca Ambrosiana di Milano, che ha portato all’individuazione di un possibile punto di arrivo in un manoscritto recante entrambi i componimenti. Essi risultano uniti nel progetto, poi abbandonato, di una plaquette celebrativa di Andrea Appiani e Antonio Canova, due dei massimi esponenti del neoclassicismo italiano nelle arti figurative. Lo scopo è portare alla luce un cimento poetico forse ingiustamente condannato dallo stesso autore e aggiungere un tassello alla definizione della sua complessa - benché poco nota - figura intellettuale.

"In morte di Andrea Appiani pittore" and "In morte di Antonio Canova scultore": unpublished verses by Felice Bellotti
The paper provides two unpublished poems written by Felice Bellotti: In morte di Andrea Appiani pittore and In morte di Antonio Canova scultore. A philological study is presented, based on the author’s manuscripts. One of these, including a writing of both the poems, turned out to be a putative arrival point. It seems to be the project of a commemorative plaquette, made after the death of two important exponents of the Italian neoclassical art: Andrea Appiani and Antonio Canova. The intent is to bring these verses to light, adding some details to the definition of Felice Bellotti’s figure.
description: Prassi Ecdotiche della Modernità Letteraria, N. 4/I (2019)
Low-Energy Probes of a Warped Extra Dimension
Creators: name: McDonald, Kristian L.
name: Morrissey, David E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate a natural realization of a light Abelian hidden sector in an extended Randall-Sundrum (RS) model. In addition to the usual RS bulk we consider a second warped space containing a bulk U(1)_x gauge theory with a characteristic IR scale of order a GeV. This Abelian hidden sector can couple to the standard model via gauge kinetic mixing on a common UV brane. We show that if such a coupling induces significant mixing between the lightest U(1)_x gauge mode and the standard model photon and Z, it can also induce significant mixing with the heavier U(1)_x Kaluza-Klein (KK) modes. As a result it might be possible to probe several KK modes in upcoming fixed-target experiments and meson factories, thereby offering a new way to investigate the structure of an extra spacetime dimension.
description: 26 pages, 1 figure, added references, corrected minor typos, same as journal version
Recensione di Anna Baldini, Daria Biagi, Stefania De Lucia, Irene Fantappiè, Michele Sisto, "La letteratura tedesca in Italia. Un’introduzione (1900-1920)", Macerata, Quodlibet Studio, 2018
Creators: name: Bonsi, Claudia
Publisher: name: Prassi Ecdotiche della Modernità Letteraria
Year: 2019
Subjects: letteratura tedesca; traduzioni; mediazione culturale

description: Pubblicato dall’editore maceratese Quodlibet nella neonata collana «Letteratura tradotta in Italia», il manuale deve la propria forma corale e organica ai lavori del progetto Futuro in Ricerca (2013-2018) Storia e mappe digitali della letteratura tedesca in Italia: editoria, campo letterario, interferenza, sostenuto dal finanziamento del Ministero dell’Università e della Ricerca (MIUR) e coordinato da Michele Sisto con Anna Baldini e Irene Fantappiè, presso, rispettivamente, l’Istituto Italiano di Studi Germanici in Roma,
l’Università per Stranieri di Siena e Sapienza Università di Roma.

Review of Anna Baldini, Daria Biagi, Stefania De Lucia, Irene Fantappiè, Michele Sisto, "La letteratura tedesca in Italia. Un’introduzione (1900-1920)", Macerata, Quodlibet Studio, 2018.

https://www.quodlibet.it/libro/9788822901699
description: Prassi Ecdotiche della Modernità Letteraria, N. 4/I (2019)
Rigidity of amalgamated free products in measure equivalence
Creators: name: Kida, Yoshikata
Publisher: name: arXiv
Year: 2009
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E06, 20E08, 37A20

description: A discrete countable group Γis said to be ME rigid if any discrete countable group that is measure equivalent to Γis virtually isomorphic to Γ. In this paper, we construct ME rigid groups by amalgamating two groups satisfying rigidity in a sense of measure equivalence. A class of amalgamated free products is introduced, and discrete countable groups which are measure equivalent to a group in that class are investigated.
description: 51 pages, Theorem 1.5 (a) and Proposition 9.5 modified
Riscritture, nuove stesure, nuove edizioni: prassi autoriali e prassi ecdotiche
Creators: name: Mastropaolo, Maria Rita
Publisher: name: Prassi Ecdotiche della Modernità Letteraria
Year: 2019

description: ...
description: Prassi Ecdotiche della Modernità Letteraria, N. 4/I (2019)
Discrete Tomography of F-Type Icosahedral Model Sets
Creators: name: Huck, Christian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 52C23 (Primary) 11R04, 11R06, 52A10, 52B20, 82D99 (Secondary)

description: We address the problem of uniquely reconstructing F-type icosahedral quasicrystals from few images produced by quantitative high resolution transmission electron microscopy and explain recent results in the discrete tomography of these sets.
description: 7 pages, 4 figures; paper presented at the 10th International Conference on Quasicrystals ICQ10 (Zurich, Switzerland)
Considerations on the symmetry of loop order in cuprates
Creators: name: Shekhter, A.
name: Varma, C. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The loop-current state discovered in the pseudogap phase of cuprates breaks time reversal symmetry and lowers the point group symmetry of the crystal. The order parameter and the magnetic structure within each unit cell which is associated with it can be described by a toroidal moment parallel to the copper-oxide planes. We discuss lattice point group symmetry of the magnetic structure. As an application, we discuss a few effects that necessarily accompany order parameter in the pseudogap phase. The magnitude estimated for these specific effects makes them hard to observe because they rely on the small magnetic fields associated with the order parameter. Effects, associated with the electronic energies are much larger. Some of them have already been discussed.
description: 7 pages
On the Relationship Between Debris Disks and Planets
Creators: name: Kóspál, Ágnes
name: Ardila, David R.
name: Moór, Attila
name: Ábrahám, Péter
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Dust in debris disks is generated by collisions among planetesimals. The existence of these planetesimals is a consequence of the planet formation process, but the relationship between debris disks and planets has not been clearly established. Here we analyze Spitzer/MIPS 24 and 70 micrometer data for 150 planet-bearing stars, and compare the incidence of debris disks around these stars with a sample of 118 stars around which planets have been searched for, but not found. Together they comprise the largest sample ever assembled to deal with this question. The use of survival analysis techniques allows us to account for the large number of non-detections at 70 micrometer. We discovered 10 new debris disks around stars with planets and one around a star without known planets. We found that the incidence of debris disks is marginally higher among stars with planets, than among those without, and that the brightness of the average debris disk is not significantly different in the two samples. We conclude that the presence of a planet that has been detected via current radial velocity techniques is not a good predictor of the presence of a debris disk detected at infrared wavelengths.
description: Accepted for publication in the Astrophysical Journal Letters, 20 pages, 2 figures, 3 tables (Table 2 is available in machine readable form in the online journal)
Additional file 7 of The clinical impact of IKZF1 mutation in acute myeloid leukemia
Creators: name: Zhang, Xiang
name: Huang, Aijie
name: Liu, Lixia
name: Qin, Jiayue
name: Wang, Chengcheng
name: Yang, Min
name: Lou, Yinjun
name: Wang, Lei
name: Ni, Xiong
name: Hu, Xiaoxia
name: Tang, Gusheng
name: Zhang, Mengmeng
name: Cao, Shanbo
name: Mao, Liping
name: Qian, Jiejin
name: Xu, Weilai
name: Wei, Juying
name: Xu, Gaixiang
name: Meng, Haitao
name: Mai, Wenyuan
name: Yang, Chunmei
name: Zhu, Honghu
name: Tong, Hongyan
name: Yang, Jianmin
name: Yu, Wenjuan
name: Wang, Jianmin
name: Jin, Jie
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Cancer
subject: Hematology

description: Additional file 7: Table S4. The influence of IKZF1 mutation on AML with different CSF3R-mutated status.
A study of ship size and turnaround time in the port of Vancouver
Creators: name: Studer, Keith Ronald
Publisher: name: University of British Columbia
Year: 2011

description: Ships of all types spend a large part of their lives in port and this idle time adds considerably to the fixed cost of providing shipping service. Technological progress has empowered the construction of larger, faster and more economical vessels, but organisational and cargo handling innovations in the ports have not kept pace; in many instances the line-haul savings achieved by larger vessels are negated by excessive idle time in port, during which many costs continue unabated. The extent to which ship size affects loading time is thus a measure of the extent to which economies of scale can be implemented in the shipping industry; it is also important when making a rational selection of an optimal ship size. This study concentrates on the loading of grain ships in the port of Vancouver; the operations of the port are examined and the constituent factors of turnaround time delineated. Some of the possible causes of delay are investigated. The costs associated with unproductive ship time are then estimated and it is shown that many of the developments in the shipping industry are placing increased emphasis on a fast turnaround, the latter is often difficult to achieve because of disorganisation and conflicting interests in the port. The loading records of a sample of 1,305 grain ships are then examined with a view to determining the degree of size dependency inherent in the loading time and loading rate attained. It is concluded that there is an appreciable positive correlation between ship size and loading rate and that the portion of the variation explained by linear regression analysis is not inconsiderable. Combining these dependencies of ship size and loading rate with the dependency of ship size and cost estimated previously, the general form of the relationship between ship size and total loading time cost per ton is obtained. It is found that for those types of grain for which the results are most conclusive, the cost per ton falls up to large ship sizes. Having regard to the present loading procedures for grain in Vancouver some possible improvements are suggested, namely the provision of increased loading capacity and the aggregation of specific grades of grain around the harbour. A rough estimate of the possible benefits associated with these course of action is made. The potential benefits would seem to be considerable, but a high degree of co-operation and co-ordination between the various port interests would be required to attain them.
Nernst effect and diamagnetic response in a stripe model of superconducting cuprates
Creators: name: Martin, Ivar
name: Panagopoulos, C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We examine the possibility that the experimentally observed enhancement of superconducting (SC) fluctuations above the SC transition temperature in the underdoped cuprates is caused by stripes -- an intrinsic electronic inhomogeneity, common to hole-doped cuprates. By evaluating the strengths of the diamagnetic response and the Nernst effect within the striped SC model, we find results that are qualitatively consistent with the experimental observations. We make a prediction for anisotropic thermopower in detwinned samples that can be used to further test the proposed scenario.
description: 5 pages, 3 figures; final version published in Europhysics Letters
Matrix Inflation and the Landscape of its Potential
Creators: name: Ashoorioon, Amjad
name: Firouzjahi, Hassan
name: Sheikh-Jabbari, Mohammmad Mahdi
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently we introduced an inflationary setup in which the inflaton fields are matrix valued scalar fields with a generic quartic potential, M-flation. In this work we study the landscape of various inflationary models arising from M-flation. The landscape of the inflationary potential arises from the dynamics of concentric multiple branes in appropriate flux compactifications of string theory. After discussing the classical landscape of the theory we study the possibility of transition among various inflationary models appearing at different points on the landscape, mapping the quantum landscape of M-flation. As specific examples, we study some two-field inflationary models arising from this theory in the landscape.
description: v1: 34 pages, 5 figures; v2: To be published in JCAP; v3: JCAP version
Langlands duality for finite-dimensional representations of quantum affine algebras
Creators: name: Frenkel, Edward
name: Hernandez, David
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B37, 17B10, 81R50

description: We describe a correspondence (or duality) between the q-characters of finite-dimensional representations of a quantum affine algebra and its Langlands dual in the spirit of q-alg/9708006 and 0809.4453. We prove this duality for the Kirillov-Reshetikhin modules and their irreducible tensor products. In the course of the proof we introduce and construct "interpolating (q,t)-characters" depending on two parameters which interpolate between the q-characters of a quantum affine algebra and its Langlands dual.
description: 40 pages; several results and comments added. Accepted for publication in Letters in Mathematical Physics
Micropropagation of Cleome dendroides (Cleomaceae), an endemic Brazilian species, as a source of glucosinolates
Creators: name: Castro, Tatiana Carvalho De
name: Simões-Gurgel, Claudia
name: Gayer, Carlos Roberto
name: Marsen Garcia Pinto Coelho
name: Albarello, Norma
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Plant Biology

description: This is the first study related to micropropagation and phytochemical analyses of Cleome dendroides, an endemic species of the Brazilian Atlantic Forest, a biome affected by human activity. Among the classes of substances produced by the genus Cleome, the glucosinolates are used as chemotaxonomic markers. They have a wide structural diversity, which affords, for example, antineoplastic bioactivity. The micropropagation was established using explants from two sources: seedlings and in vitro plants. The morphogenic response was evaluated on Murashige-Skoog (MS) medium with different concentrations of benzyladenine (BA). Hypocotyl explants from seedlings and stem explants from in vitro plants showed higher capacity of shoot regeneration (56.3-100%). Shoot proliferation (75-100%) was maintained when hypocotyl explant-derived shoots and stem explant-derived shoots were subcultured three times a month. Hypocotyl explant-derived shoots maintained on MS + 2.0 mgL−1 BA induced the highest shoot production along the subcultures. Shoots were elongated and rooted on growth regulator-free MS medium. Plantlet establishment was successful in the hardening medium composed of Plantmax® substrate, reaching 85%survival. The phytochemical studies indicated two glucosinolate derivatives, highlighting the presence of 5,6-dimethyltetrahydro-1,3-oxazine-2-thione, identified for the first time in plants. This work demonstrates an efficient method for in-vitro production of C. dendroides plants, which can be used as a source of glucosinolates.
Distribution of archaeological sites of Ancient Peru is linked to climatology and natural vegetation
Creators: name: Galán-De-Mera, Antonio
name: Linares-Perea, Eliana
name: Martos-Rodríguez, Fredy
name: Montoya-Quino, Juan
name: Rodríguez-Zegarra, Carla
name: Torres-Marquina, Iván
name: Trujillo-Vera, Carlos
name: Villasante-Benavides, Francisco
name: Árias-Gámez, Juan Miguel
name: Vicente-Orellana, José Alfredo
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Hematology
subject: Plant Biology

description: In this article, we try to discover a parallelism among climate and bioclimate belts, use of the territory, and previously studied plant communities, taking into account historical and archaeological data to find an answer as to how different cultures perceived the landscapes. After a statistical analysis generating a Sørensen dendrogram, we were able to observe how archaeological sites were ordered according to bioclimatic belts, crops, and human activity; the results of a canonical correspondence analysis (CCA) showed connections among archaeological sites, crops, products, and plant associations of the landscapes. Groups with the most humid climate represent areas with crops with a seasonal rain regime and shepherding of llamas and alpacas, while groups with the driest climate represent areas whose crops need irrigation. Notably, occidental slope areas with cactus associations present a terrace agricultural system irrigated by water springs, while sites near riparian plant associations are joined to vegetable gardens. Amazonian and Oriental Andean crops are present in the same bioclimatic belt in comparison to the coast. Using a minimal spanning tree (MST), hypothetical roads to exchange products between different crop areas could be traced with a high coincidence with the Inca Road (Qhapaq Ñan).
The young stellar population at the center of NGC 205
Creators: name: Monaco, L.
name: Saviane, I.
name: Perina, S.
name: Bellazzini, M.
name: Buzzoni, A.
name: Federici, L.
name: Pecci, F. Fusi
name: Galleti, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Context. NGC 205 is a peculiar dwarf elliptical galaxy hosting in its center a population of young blue stars. Their origin is still matter of debate, the central fresh star formation activity possibly being related to dynamical interactions between NGC 205 and M31. Aims. The star formation history in the central 30\arcsec ($\sim$120 pc) around the NGC 205 central nucleus is investigated in order to obtain clues to the origin of the young stellar population. Methods. Deep HST/ACS CCD photometry is compared with theoretical isochrones and luminosity functions to characterize the stellar content of the region under study and compute the recent SF rate. Results. Our photometry reveals a previously undetected blue plume of young stars clearly distinguishable down to I$\simeq$26. Our analysis suggests that 1.9$\times10^5$ M$_\odot$ were produced between approximately 62 Myr and 335 Myr ago in the NGC 205 inner regions, with a latest minor episode occurring $\sim$25 Myr ago. This implies a star formation rate of $\sim7\times10^{-4}$ M$_\odot$/yr over this period. Conclusions. The excellent fit of the observed luminosity function of young main sequence stars obtained with a model having a constant star formation rate argues against a tidally triggered star formation activity over the last $\sim$300 Myr. Rather, a constant SF may be consistent with NGC 205 being on its first interaction with M 31.
description: 5 pages, 2 figures, accepted for publication in A&A letters
Microhistological characterisation of some species of the genus Quercus L. from Sierra Morena range (southern Iberian Peninsula)
Creators: name: Melendo-Luque, Manuel
name: Contreras-Carmona, Ana
name: Rodríguez-Verdú, Diego
name: Azorit, Concepción
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: The micromorphological characters of leaves in the genus Quercus have proved very useful in their taxonomy. A microhistological study of the most representative species of the genus Quercus in the eastern part of Sierra Morena (southern Iberian Peninsula) is carried out in this work: Q. coccifera, Q. faginea subsp. faginea, Q. pyrenaica, Q. rotundifolia and Q. suber. The leaves microcharacters were studied, measured, photographed and compared in order to provide a good description by optical microscope. In particular, features related to trichomes, stomata and epidermal cells on adaxial and abaxial leaf surface have been used. The data for 21 variables were collected. Our study confirms the usefulness of the micromorphological characters of the leaf epidermis and optical microscopy to distinguish between Quercus species, and has helped to identify the studied species. Some of the species can be identified by a single diagnostic character, and others by a combination of few characters. Based on the set of analyzed characteristics, a dichotomy key for the differentiation of the five taxa studied in this work is proposed.
Selecting Quasars by their Intrinsic Variability
Creators: name: Schmidt, Kasper B.
name: Marshall, Philip J.
name: Rix, Hans-Walter
name: Jester, Sebastian
name: Hennawi, Joseph F.
name: Dobler, Gregory
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a new and simple technique for selecting extensive, complete and pure quasar samples, based on their intrinsic variability. We parametrize the single-band variability by a power-law model for the light-curve structure function, with amplitude A and power-law index gamma. We show that quasars can be efficiently separated from other non-variable and variable sources by the location of the individual sources in the A-gamma plane. We use ~60 epochs of imaging data, taken over ~5 years, from the SDSS stripe 82 (S82) survey, where extensive spectroscopy provides a reference sample of quasars, to demonstrate the power of variability as a quasar classifier in multi-epoch surveys. For UV-excess selected objects, variability performs just as well as the standard SDSS color selection, identifying quasars with a completeness of 90% and a purity of 95%. In the redshift range 2.5
description: 16 pages, 9 color figures and 5 tables - v3: Equations corrected and text updated (see Erratum for details of corrections). Erratum: http://adsabs.harvard.edu/abs/2010ApJ...721.1941S Original Paper: http://adsabs.harvard.edu/abs/2010ApJ...714.1194S
Self-duality and bound states of the toric code model in a transverse field
Creators: name: Vidal, J.
name: Thomale, R.
name: Schmidt, K. P.
name: Dusuel, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the effect of a transverse magnetic field on the toric code model. We show that this problem can be mapped onto the Xu-Moore model and thus onto the quantum compass model which are known to be self-dual. We analyze the low-energy spectrum by means of perturbative continuous unitary transformations and determine accurately the energy gaps of various symmetry sectors. Our results are in very good agreement with exact diagonalization data for all values of the parameters except at the self-dual point where level crossings are responsible for a first order phase transition between a topological phase and a polarized phase. Interestingly, bound states of two and four quasiparticles with fermionic and bosonic statistics emerge, and display dispersion relations of reduced dimensionality.
description: 4 pages, 4 figures, typos in Eq.(4) corrected
On the error analysis of correlation devices
Creators: name: Chang, Ke-Yen
Publisher: name: University of British Columbia
Year: 2011

description: The use of uniformly distributed auxiliary random noise in the polarity-coincidence correlator has been described in the past. It has the advantage of constructional simplicity. It also gives an unbiased and consistent estimate of the correlation function. In this thesis, the method of using auxiliary random noise is extended to the multi-level digital correlator. It is found that any random noise of which the characteristic function has periodic zeros can be used as an auxiliary noise, that uniformly distributed noise is a special case, and that quantizing the auxiliary random noise has the same effect as directly quantizing the input signals. The mean-square error of this modified digital correlator is analyzed in detail. It differs from the mean-square error of the direct correlator only by a term which is inversely proportional to the total number of samples taken, provided that the power spectrum of the auxiliary noise is wide enough. This additional error is the combined effect of sampling, quantizing and adding auxiliary noise. It can be reduced to any desired value by taking a larger number of samples, by using a higher sampling rate, or by quantizing more finely. For completeness, the mean-square errors of the digital correlator, the Stieltjes correlator and the modified Stieltjes correlator are also derived. The mean-square error of the modified polarity-coincidence correlator, which is a special case of the modified digital correlator, is compared with the error of the multi-level modified digital correlator. Despite its constructional simplicity, the modified polarity-coincidence has a much larger error than the multi-level correlator. A small increase in the number of quantization levels reduces the error considerably. The implementation of a modified digital correlator with coarse quantization is also considered. A fast direct multiplier is designed to obtain high operation speed. Finally, the use of pseudo-random noise as an auxiliary noise is discussed.
Photoemission of a doped Mott insulator: spectral weight transfer and qualitative Mott-Hubbard description
Creators: name: Sing, M.
name: Glawion, S.
name: Schlachter, M.
name: Scholz, M. R.
name: Goss, K.
name: Heidler, J.
name: Berner, G.
name: Claessen, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The spectral weight evolution of the low-dimensional Mott insulator TiOCl upon alkali-metal dosing has been studied by photoelectron spectroscopy. We observe a spectral weight transfer between the lower Hubbard band and an additional peak upon electron-doping, in line with quantitative expectations in the atomic limit for changing the number of singly and doubly occupied sites. This observation is an unconditional hallmark of correlated bands and has not been reported before. In contrast, the absence of a metallic quasiparticle peak can be traced back to a simple one-particle effect.
description: 4 pages, 4 figures, related theoretical work can be found in arXiv:0905.1276; shortened