cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Argon: Performance Insulation for Shared Storage Servers (CMU-PDL-06-106 )
Creators: name: Wachs, Matthew
name: Abd-El-Malek, Michael
name: Thereska, Eno
name: Ganger, Gregory R.
Publisher: name: Carnegie Mellon University
Year: 2006
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: Services that share a storage system should realize the same efficiency, within their share of time, as when they have the system to themselves. The Argon storage server explicitly manages its resources to bound the inefficiency arising from inter-service disk and cache interference in traditional systems. The goal is to provide each service with at least a configured fraction (e.g., 0.9) of the throughput it achieves when it has the storage server to itself, within its share of the server—a service allocated 1 nth of a server should get nearly 1 nth (or more) of the throughput it would get alone. Argon uses automaticallyconfigured prefetch/write-back sizes to insulate streaming efficiency from disk seeks introduced by competing workloads. It uses explicit disk time quanta to do the same for non-streaming workloads with internal locality. It partitions the cache among services, based on their observed access patterns, to insulate the hit rate each achieves from the access patterns of others. Experiments show that, combined, these mechanisms and Argon’s automatic configuration of each achieve the insulation goal.
Extensions of partial cyclic orders and consecutive coordinate polytopes
Creators: name: Ayyer, Arvind
name: Josuat-Vergès, Matthieu
name: Ramassamy, Sanjay
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We introduce several classes of polytopes contained in $[0,1]^n$ and cut out by inequalities involving sums of consecutive coordinates. We show that the normalized volumes of these polytopes enumerate circular extensions of certain partial cyclic orders. Among other things this gives a new point of view on a question popularized by Stanley. We also provide a combinatorial interpretation of the Ehrhart $h^*$-polynomials of some of these polytopes in terms of descents of total cyclic orders. The Euler numbers, the Eulerian numbers and the Narayana numbers appear as special cases.
description: 26 pages, 6 figures. Minor notation changes
Identification of multilocus SSR markers to assess the genetic diversity of Xylella fastidiosa subsp. pauca, ST53, spreading in Apulia (southern Italy)
Creators: name: BB, Landa
Publisher: name: Zenodo
Year: 2019
Subjects: SSR markers, Xylella fastidiosa, ST53, Apulia

description: The epidemic spread of Xylella fastidiosa in Apulia (southern Italy) with the continuous expansions of the border of the infected area, prompted several investigations into the genetics and genomics of the strains associated with the infections. These studies aimed to find genetic correlations with known strains of the bacterium as well as among the initially discovered Apulian outbreaks and those that emerged from time to time. MLST and full genome sequencing provided clear evidence that a single genotype, denoted ST53, of the subspecies pauca was causing the epidemics among olives and other hosts. In this work, we tested a panel of SSR markers in the attempt to disclose information on the genetic diversity and evolution of the bacterial population, even if, given the reduced spatial and temporal scales of this recent epidemic, a relatively low level of variation was expected. Five SSR markers selected among those previously reported in the literature proved to be polymorphic for the ST53-isolates from Apulia, that even if yielding a small number of alleles (from 2 to 5), when combined provide a good resolution, distinguishing several genotypes. Additionally, the design of a new set of 12 SSR markers for fine-scale genotyping of the Apulian isolates, yielded higher number of allelic variation, paving the way to perform micro-evolutionary and epidemiological studies. Indeed, the successful use of these markers on DNA plant samples, will allow a large-scale study, taking advantage of a six-year dataset of plant DNA collected and stored as part of the official monitoring programme started in the region at the beginning of the epidemics in 2013 and covering the entire demarcated area in Apulia that currently exceeds 200,000 ha.
Some New Constructions of Quantum MDS Codes
Creators: name: Fang, Weijun
name: Fu, Fang-Wei
Publisher: name: arXiv
Year: 2018
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: It is an important task to construct quantum maximum-distance-separable (MDS) codes with good parameters. In the present paper, we provide six new classes of q-ary quantum MDS codes by using generalized Reed-Solomon (GRS) codes and Hermitian construction. The minimum distances of our quantum MDS codes can be larger than q/2+1 Three of these six classes of quantum MDS codes have longer lengths than the ones constructed in [1] and [2], hence some of their results can be easily derived from ours via the propagation rule. Moreover, some known quantum MDS codes of specific lengths can be seen as special cases of ours and the minimum distances of some known quantum MDS codes are also improved as well.
description: Accepted for publication in IEEE Transactions on Information Theory
Coherent analogues of matrix factorizations and relative singularity categories
Creators: name: Efimov, Alexander I.
name: Positselski, Leonid
Publisher: name: arXiv
Year: 2011
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 13D09, 14F05, 16G99

description: We define the triangulated category of relative singularities of a closed subscheme in a scheme. When the closed subscheme is a Cartier divisor, we consider matrix factorizations of the related section of a line bundle, and their analogues with locally free sheaves replaced by coherent ones. The appropriate exotic derived category of coherent matrix factorizations is then identified with the triangulated category of relative singularities, while the similar exotic derived category of locally free matrix factorizations is its full subcategory. The latter category is identified with the kernel of the direct image functor corresponding to the closed embedding of the zero locus and acting between the conventional (absolute) triangulated categories of singularities. Similar results are obtained for matrix factorizations of infinite rank; and two different "large" versions of the triangulated category of relative singularities, corresponding to the approaches of Orlov and Krause, are identified in the case of a Cartier divisor. A version of the Thomason-Trobaugh-Neeman localization theory is proven for coherent matrix factorizations and disproven for locally free matrix factorizations of finite rank. Contravariant (coherent) and covariant (quasi-coherent) versions of the Serre-Grothendieck duality theorems for matrix factorizations are established, and pull-backs and push-forwards of matrix factorizations are discussed at length. A number of general results about derived categories of the second kind for CDG-modules over quasi-coherent CDG-algebras are proven on the way. Hochschild (co)homology of matrix factorization categories are discussed in an appendix.
description: LaTeX 2e with pb-diagram and xy-pic; 114 pages, 13 commutative diagrams. v.8: new sections 2.10, 3.1 and 3.7 inserted; v.9: appendix B added, remarks inserted in sections 2.10 and 2.7, section 1.8 expanded; v.10: new section 3.3 inserted, the whole paper has two authors now; v.11: small corrections, additions, and improvements -- this is intended as the final version
An Analysis of Traces from a Production MapReduce Cluster (CMU-PDL-09-107)
Creators: name: Kavulya, Soila
name: Jiaqi  Tan
name: Gandhi, Rajeev
name: Narasimhan, Priya
Publisher: name: Carnegie Mellon University
Year: 2009
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: MapReduce is a programming paradigm for parallel processing that is increasingly being used for data-intensive applications in cloud computing environments. An understanding of the characteristics of workloads running in MapReduce environments benefits both the service providers in the cloud and users: the service provider can use this knowledge to make better scheduling decisions, while the user can learn what aspects of their jobs impact performance. This paper analyzes 10-months of MapReduce logs from the M45 supercomputing cluster which Yahoo! made freely available to select universities for systems research. We characterized resource utilization patterns, job patterns, and sources of failures. We use an instance-based learning technique that exploits temporal locality to predict job completion times from historical data and identify potential performance problems in our dataset.
Horizontal vector fields and Seifert fiberings
Creators: name: Hammerlindl, Andy
Publisher: name: arXiv
Year: 2018
Subjects: subject: Geometric Topology (math.GT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 55R05, 57R25, 57R18

description: This paper gives a classification of the topology of vector fields which are nowhere tangent to the fibers of a Seifert fibering.
description: 35 pages, 1 figure. The v2 version of this preprint significantly differs from v1. It is over twice as long and gives much more detail. Some statements involving manifolds with multiple Seifert fiberings were also corrected
Collective suppression of optical hyperfine pumping in dense clouds of atoms in microtraps
Creators: name: Machluf, Shimon
name: Naber, Julian B.
name: Soudijn, Maarten L.
name: Ruostekoski, Janne
name: Spreeuw, Robert J. C.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We observe a density-dependent collective suppression of optical pumping between the hyperfine ground states in an array of submicrometer-sized clouds of cold rubidium atoms. The suppressed Raman transition rate can be explained by strong resonant dipole-dipole interactions that are enhanced by increasing atom density. The observations are consistent with stochastic electrodynamics simulations that incorporate the effects of the nonlinear population transfer via internal atomic levels embedded in a coupled-dipole model.
description: Manuscript: 6 pages, 4 figures. Supplementary material: 5 pages, 1 figure, and 2 tables. Revised version v2: in particular experiment-theory comparison strengthened significantly
Affinity Scheduling in Staged Server Architectures (CMU-CS-02-113)
Creators: name: Harizopoulos, Stavros
name: Ailamaki, Anastassia
Publisher: name: Carnegie Mellon University
Year: 2002
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: Modern servers typically process request streams by assigning a worker thread to a request, and rely on a round robin policy for context-switching. Although this programming paradigm is intuitive, it is oblivious to the execution state and ignores each software module’s affinity to the processor caches. As a result, resumed threads of execution suffer additional delays due to conflict and com-pulsory misses while populating the caches with their evicted working sets. Alternatively, the staged programming paradigm divides computation into stages and allows for stage-based (rather than request thread-based) cohort scheduling that improves module affinity. This technical report introduces (a) four novel cohort scheduling techniques for staged software servers that follow a "production-line" model of operation, and (b) a mathematical framework to methodically quantify the performance trade-offs when using these techniques. Our Markov chain analysis of one of the scheduling techniques matches the simulation results. Using our model on a staged database server, we found that the proposed policies exploit data and instruction locality for a wide range of workload parameter values and outperform traditional techniques such as FCFS and processor-sharing. Consequently, our results justify the restructuring of a wide class of software servers to incorporate the staged programming paradigm.
Holographic Gauge Theories in Background Fields and Surface Operators
Creators: name: Buchbinder, Evgeny I.
name: Gomis, Jaume
name: Passerini, Filippo
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a new class of supersymmetric surface operators in N=4 SYM and find the corresponding dual supergravity solutions. We show that the insertion of the surface operator - which is given by a WZW model supported on the surface - appears by integrating out the localized degrees of freedom along the surface which arise microscopically from a D3/D7 brane intersection. Consistency requires constructing N=4 SYM in the D7 supergravity background and not in flat space. This enlarges the class of holographic gauge theories dual to string theory backgrounds to gauge theories in non-trivial supergravity backgrounds. The dual Type IIB supergravity solutions we find reveal - among other features - that the holographic dual gauge theory does indeed live in the D7-brane background.
description: 42 pages, harvmac, corrected typos
Additional file 1 of The DDR-related gene signature with cell cycle checkpoint function predicts prognosis, immune activity, and chemoradiotherapy response in lung adenocarcinoma
Creators: name: Li, Quan
name: Zhang, Pan
name: Hu, Huixiao
name: Huang, Hang
name: Pan, Dong
name: Mao, Guangyun
name: Hu, Burong
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 1. Additional figures.
The Echelle Visualization Tool
Creators: name: Stemock, Bryson
Publisher: name: Zenodo
Year: 2021
Subjects: Instrumentation/Software
ARC 3.5m Telescope
ARCES

description: While many ARCES users are veteran observers who know what to expect when taking their data, newer users lack the intuition and experience to efficiently assess their raw data on the fly. Hence, I present a proof-of-concept version of the Echelle Visualization Tool (EVT). The EVT takes input parameters (variable and preset instrument characteristics) and outputs an interactive plot of the echelle orders as they would appear on the CCD. The EVT can also take an input line list to display the locations of spectral lines of interest on the CCD. Furthermore, the code for the EVT is written to minimize any adjustments that would need to be made in the event that ARCES is replaced by another echelle spectrograph. The intention of this project is not only to provide a planning tool that shows users what to expect during their observing run, but to facilitate precise yet uncomplicated count checks as data are taken throughout the night. The current version is not yet an accurate representation of ARCES. Rather, the purpose of this poster is to update the community and to gather feedback and requested features that will inform the development of the EVT moving forward. Feedback survey: https://forms.gle/eVLi7w5K2j525jfZA
Physics of Coevolution of Galaxies and Supermassive Black Holes
Creators: name: Cen, Renyue
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A new model for coevolution of galaxies and supermassive black holes (SMBH) is presented that is physically based. The evolutionary track starts with an event that triggers a significant starburst in the central region of a galaxy. In this model, the main SMBH growth takes place in post-starburst phase fueled by recycled gas from inner bulge stars in a self-regulated fashion on a time scale that is substantially longer than 100Myrs and at a diminishing Eddington ratio with time. We argue that the SMBH cannot gorge itself during the starburst phase, despite the abundant supply of cold gas, because star formation is a preferred mode of gas consumption in such an environment than accretion to the central SMBH. We also show that feedback from star formation is at least as strong as that from AGN and thus, if star formation is in need of being quenched, AGN feedback generally does not play the primary role. The predicted relation between SMBH mass and bulge mass/velocity dispersion is consistent with observations. A clear prediction is that early-type galaxy hosts of high Eddingtion rate AGNs are expected to be light-blue to green in optical color, gradually evolving to the red sequences with decreasing AGN luminosity. A suite of falsifiable predictions and implications with respect to relationships between various types of galaxies and AGN, and others, are made. For those where comparisons to extant observations are possible, the model appears to be in good standing.
description: 38 pages, 3 figures, in press of the Astrophysical Journal
Systematic Bias in Cosmic Shear: Beyond the Fisher Matrix
Creators: name: Amara, Adam
name: Refregier, Alexandre
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe a method for computing the biases that systematic signals introduce in parameter estimation using a simple extension of the Fisher matrix formalism. This allows us to calculate the offset of the best fit parameters relative to the fiducial model, in addition to the usual statistical error ellipse. As an application, we study the impact that residual systematics in tomographic weak lensing measurements. In particular we explore three different types of shape measurement systematics: (i) additive systematic with no redshift evolution; (ii) additive systematic with redshift evolution; and (iii) multiplicative systematic. In each case, we consider a wide range of scale dependence and redshift evolution of the systematics signal. For a future DUNE-like full sky survey, we find that, for cases with mild redshift evolution, the variance of the additive systematic signal should be kept below 10^-7 to ensure biases on cosmological parameters that are sub-dominant to the statistical errors. For the multiplicative systematics, which depends on the lensing signal, we find the multiplicative calibration m0 needs to be controlled to an accuracy better than 10^-3. We find that the impact of systematics can be underestimated if their assumes redshift dependence is too simplistic. We provide simple scaling relations to extend these requirements to any survey geometry and discuss the impact of our results for current and future weak lensing surveys.
description: Submitted to MNRAS. 11 pages, including 11 figures and 4 tables
A constructive approach to Freyd categories
Creators: name: Posur, Sebastian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Category Theory (math.CT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 18E10, 18E05, 18A25, 18E25, 16S99

description: In this paper we give an algorithmic description of Freyd categories that subsumes and enhances the usual approach to finitely presented modules in computer algebra. The upshot is a constructive approach to finitely presented functors that only relies on a few basic algorithms.
Adaptive, Hands-Off Stream Mining (CMU-CS-02-205)
Creators: name: Papadimitriou, Spiros
name: Brockwell, Anthony
name: Faloutsos, Christos
Publisher: name: Carnegie Mellon University
Year: 2003
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: Sensor devices and embedded processors are becoming ubiquitous, especially in measurement and monitoring applications. Automatic discovery of patterns and trends in the large volumes of such data is of paramount importance. The combination of relatively limited resources (CPU, memory and/or communication bandwidth and power) poses some interesting challenges. We need both powerful and concise "languages" to represent the important features of the data, which can (a) adapt and handle arbitrary periodic components, including bursts, and (b) require little memory and a single pass over the data. This allows sensors to automatically (a) discover interesting patterns and trends in the data, and (b) perform outlier detection to alert users. We need a way so that a sensor can discover something like "the hourly phone call volume so far follows a daily and a weekly periodicity, with bursts roughly every year," which a human might recognize as, e.g., the Mother's day surge. When possible and if desired, the user can then issue explicit queries to further investigate the reported patterns. In this work we propose AWSOM (Arbitrary Window Stream mOdeling Method), which allows sensors operating in remote or hostile environments to discover patterns efficiently and effectively, with practically no user interventions. Our algorithms require limited resources and thus can be incorporated in individual sensors, possibly alongside a distributed query processing engine. Updates are performed in constant time, using sub-linear (in fact, logarithmic) space. Existing, state of the art forecasting methods (AR, SARIMA, GARCH, etc) fall short on one or more of these requirements. To the best of our knowledge, AWSOM is the first method that has all the above characteristics. Experiments on real and synthetic datasets demonstrate that AWSOM discovers meaningful patterns over long time periods. Thus, the patterns can also be used to make long-range forecasts, which are notoriously difficult to perform automatically and efficiently. In fact, AWSOM outperforms manually set up auto-regressive models, both in terms of long-term pattern detection and modeling, as well as by at least 10x in resource consumption.
The Sheaf-Theoretic Structure Of Non-Locality and Contextuality
Creators: name: Abramsky, Samson
name: Brandenburger, Adam
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Logic in Computer Science (cs.LO)
subject: Category Theory (math.CT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We use the mathematical language of sheaf theory to give a unified treatment of non-locality and contextuality, in a setting which generalizes the familiar probability tables used in non-locality theory to arbitrary measurement covers; this includes Kochen-Specker configurations and more. We show that contextuality, and non-locality as a special case, correspond exactly to obstructions to the existence of global sections. We describe a linear algebraic approach to computing these obstructions, which allows a systematic treatment of arguments for non-locality and contextuality. We distinguish a proper hierarchy of strengths of no-go theorems, and show that three leading examples --- due to Bell, Hardy, and Greenberger, Horne and Zeilinger, respectively --- occupy successively higher levels of this hierarchy. A general correspondence is shown between the existence of local hidden-variable realizations using negative probabilities, and no-signalling; this is based on a result showing that the linear subspaces generated by the non-contextual and no-signalling models, over an arbitrary measurement cover, coincide. Maximal non-locality is generalized to maximal contextuality, and characterized in purely qualitative terms, as the non-existence of global sections in the support. A general setting is developed for Kochen-Specker type results, as generic, model-independent proofs of maximal contextuality, and a new combinatorial condition is given, which generalizes the `parity proofs' commonly found in the literature. We also show how our abstract setting can be represented in quantum mechanics. This leads to a strengthening of the usual no-signalling theorem, which shows that quantum mechanics obeys no-signalling for arbitrary families of commuting observables, not just those represented on different factors of a tensor product.
description: 33 pages. Extensively revised, new results included. Published in New Journal of Physics
Tunable $Γ- K$ Valley Populations in Hole-Doped Trilayer WSe$_2$
Creators: name: Movva, Hema C. P.
name: Lovorn, Timothy
name: Fallahazad, Babak
name: Larentis, Stefano
name: Kim, Kyounghwan
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Banerjee, Sanjay K.
name: MacDonald, Allan H.
name: Tutuc, Emanuel
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a combined experimental and theoretical study of valley populations in the valence bands of trilayer WSe$_2$. Shubnikov$-$de Haas oscillations show that trilayer holes populate two distinct subbands associated with the $K$ and $Γ$ valleys, with effective masses 0.5$m_e$ and $1.2m_e$, respectively; $m_e$ is the bare electron mass. At a fixed total hole density, an applied transverse electric field transfers holes from $Γ$ orbitals to $K$ orbitals. We are able to explain this behavior in terms of the larger layer polarizability of the $K$ orbital subband.
description: 5 pages, 4 figures, includes supplementary material
Active Disks: Remote Execution for Network-Attached Storage (CMU-CS-97-198)
Creators: name: Riedel, Erik
name: Gibson, Garth A.
Publisher: name: Carnegie Mellon University
Year: 1997
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: The principal trend in the design of computer systems is the expectation of much greater computational power in future generations of microprocessors. This trend applies to embedded systems as well as host processors. As a result, devices such as storage controllers have excess capacity and growing computational capabilities. Storage system designers are exploiting this trend with higher-level interfaces to storage and increased intelligence inside storage devices. One development in this direction is Network-Attached Secure Disks (NASD) which attaches storage devices directly to the network and raises the storage interface above the simple (fixed-size block) memory abstraction of SCSI. This allows devices more freedom to provide efficient operations; promises more scalable subsystems by offloading file system and storage management functionality from dedicated servers; and reduces latency by executing common case requests directly at storage devices. In this paper, we push this increasing computation trend one step further. We argue that application-specific code can be executed at storage devices to make more effective use of device, host and interconnect resources and significantly improve application I/O performance. Remote execution of code directly at storage devices allows filter operations to be performed close to the data; enables support of timing-sensitive transfers and application-aware scheduling of access and transfer; allows management functions to be customized without requiring firmware changes; and makes possible more complex or specialized operations than a general-purpose storage interface would normally support.
Self-Organized Higgs Criticality
Creators: name: Eröncel, Cem
name: Hubisz, Jay
name: Rigo, Gabriele
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The critical point for a Higgs sector can be a point of interest in the potential for a modulus field such as the radion of an extra dimensional construction, or the dilaton of spontaneously broken approximate conformal invariance. In part motivated by conjectures about the self-organized critical state in statistical physics, we construct a 5D model in which there is an infrared emergent Higgs instability due to violation of the Breitenlohner-Freedman bound deep in the interior of a near AdS geometry. This is holographically dual to a "running" scaling dimension transitioning from real to complex with decreasing scale. The complex scaling indicates an instability to be resolved by condensates which modify the interior geometry and backreact on the 5D radion potential. Studying the model at small gravitational backreaction, we find a rich possible vacuum structure and uncover evidence that resolution of the instability requires a non-trivial cosmology.
description: 34 pages, 10 figures, v3: updates to abstract and draft, updated in agreement with published version
Non-Gaussianities in New Ekpyrotic Cosmology
Creators: name: Buchbinder, Evgeny I.
name: Khoury, Justin
name: Ovrut, Burt A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: New Ekpyrotic Cosmology is an alternative scenario of the early universe which relies on a phase of slow contraction before the big bang. We calculate the 3-point and 4-point correlation functions of primordial density perturbations and find a generically large non-Gaussian signal, just below the current sensitivity level of CMB experiments. This is in contrast with slow-roll inflation, which predicts negligible non-Gaussianity. The model is also distinguishable from alternative inflationary scenarios that yield large non-Gaussianity, such as DBI inflation and the simplest curvaton-like models, through the shape dependence of the correlation functions. Non-Gaussianity therefore provides a distinguishing and testable prediction of New Ekpyrotic Cosmology.
description: 4 pages. v2: sign convention clarified, references added; v3: minor changes, version to appear in PRL
title: ADCO, Boursier de Cîteaux : comptes (1489-1493) (11 H 1166), f. 00506
Creators: name: de la Côte-d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2019
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: comptes
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Boursier de Cîteaux : comptes (1489-1493), Archives départementales de la Côte-d'Or, (11 H 1166). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Boursier de Cîteaux : comptes (1489-1493), Archives départementales de la Côte-d'Or, (11 H 1166), f. 00506, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Active Disks - Remote Execution for Network-Attached Storage (CMU-CS-99-177)
Creators: name: Riedel, Erik
Publisher: name: Carnegie Mellon University
Year: 1999
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: Today's commodity disk drives, the basic unit of storage for computer systems large and small, are actually small computers, with a processor, memory, and 'network' connection, along with the spinning magnetic material that permanently stores the data. As more and more of the information in the world becomes digitally available, and more and more of our daily activities are recorded and stored, people are increasingly finding value in analyzing, rather than simply storing and forgetting, these large masses of data. Sadly, advances in I/O performance have lagged the development of commodity processor and memory technology, putting pressure on systems to deliver data fast enough for these types of data-intensive analysis. This dissertation proposes a system called Active Disks that takes advantage of the processing power on individual disk drives to run application-level code. Moving portions of an application's processing directly to the disk drives can dramatically reduce data traffic and take advantage of the parallelism already present in large storage systems. It provides a new point of leverage to overcome the I/O bottleneck. This dissertation presents the factors that will make Active Disks a reality in the not-so-distant future, the characteristics of applications that will benefit from this technology, an analysis of the improved performance and efficiency of systems built around Active Disks, and a discussion of some of the optimizations that are possible with more knowledge available directly at the devices. It also compares this work with previous work on database machines and examines the opportunities that allow us to take advantage of these promises today where previous approaches have not succeeded. The analysis is motivated by a set of applications from data mining, multimedia, and databases and is performed in the context of a prototype Active Disk system that shows dramatic speedups over a system with traditional, "dumb" disks.
On the observer dependence of the Hilbert space near the horizon of black holes
Creators: name: Goto, Kanato
name: Kazama, Yoichi
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: One of the pronounced characteristics of gravity, distinct from other interactions, is that there are no local observables which are independent of the choice of the spacetime coordinates. This property acquires crucial importance in the quantum domain in that the structure of the Hilbert space pertinent to different observers can be drastically different. Such intriguing phenomena as the Hawking radiation and the Unruh effect are all rooted in this feature. As in these examples, the quantum effect due to such observer-dependence is most conspicuous in the presence of an event horizon and there are still many questions to be clarified in such a situation. In this paper, we perform a comprehensive and explicit study of the observer dependence of the quantum Hilbert space of a massless scalar field in the vicinity of the horizon of the Schwarzschild black holes in four dimensions, both in the eternal (two-sided) case and in the physical (one-sided) case created by collapsing matter. Specifically, we compare and relate the Hilbert spaces of the three types of observers, namely (i) the freely falling observer, (ii) the observer who stays at a fixed proper distance outside of the horizon and (iii) the natural observer inside of the horizon analytically continued from outside. The concrete results we obtain have a number of important implications on black hole complementarity pertinent to the quantum equivalence principle and the related firewall phenomenon, on the number of degrees of freedom seen by each type of observer, and on the "thermal-type" spectrum of particles realized in a pure state.
description: 56 pages plus appendices and reference, 5 figures; v2: description improved, references added v3: improvements in presentation v4: version published in PTEP
title: Fluctuations in Finite N Equilibrium Stellar Systems
Creators: name: Weinberg, Martin D.
Publisher: name: University of Massachusetts Amherst
Year: 1997
Subjects: subject: gravitation
subject: methods:numerical
subject: methods: statistical
subject: stellar dynamics
subject: galaxies: kinematics and dynamics
subject: galaxies: evolution
subject: Astrophysics and Astronomy

description: This paper was harvested from ArXiv identifier is arXiv:9707206v1
description: Gravitational amplification of Poisson noise in stellar systems is important on large scales. For example, it increases the dipole noise power by roughly a factor of six and the quadrupole noise by 50% for a King model profile. The dipole noise is amplified by a factor of fifteen for the core-free Hernquist model. The predictions are computed using the dressed-particle formalism of Rostoker & Rosenbluth (1960) and are demonstrated by n-body simulation. This result implies that a collisionless n-body simulation is impossible; The fluctuation noise which causes relaxation is an intrinic part of self gravity. In other words, eliminating two-body relaxation does not eliminate relaxation altogether. Applied to dark matter halos of disk galaxies, particle numbers of at least 106 will be necessary to suppress this noise at a level that does not dominate or significantly affect the disk response. Conversely, halos are most likely far from phase-mixed equilibrium and the resulting noise spectrum may seed or excite observed structure such as warps, spiral arms and bars. For example, discreteness noise in the halo, similar to that due to a population of 106M⊙ black holes can produce observable warping and possibly excite or seed other disk structure.
Spin-Polarized to Valley-Polarized Transition in Graphene Bilayers at $ν=0$ in High Magnetic Fields
Creators: name: Kim, Seyoung
name: Lee, Kayoung
name: Tutuc, Emanuel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the transverse electric field ($E$) dependence of the $ν$=0 quantum Hall state (QHS) in dual-gated graphene bilayers in high magnetic fields. The longitudinal resistivity ($ρ_{xx}$) measured at $ν$=0 shows an insulating behavior which is strongest in the vicinity of $E$=0, and at large $E$-fields. At a fixed perpendicular magnetic field ($B$), the $ν$=0 QHS undergoes a transition as a function of $E$, marked by a minimum, temperature-independent $ρ_{xx}$. This observation is explained by a transition from a spin polarized $ν$=0 QHS at small $E$-fields, to a valley (layer) polarized $ν$=0 QHS at large $E$-fields. The $E$-field value at which the transition occurs has a linear dependence on $B$
description: 5 pages, 5 figures
The relevance of medical flow charts in emergency Manchester triage in the automatic programming of electrocardiograms and its impact on life quality and outcomes of the cardiac patient
Creators: name: Santos, José António Nobre
name: Costa, César Telmo
name: Agostinho, José Francisco
name: Pereira, Carla Sofia
name: Correia, Sónia Freitas
Publisher: name: Journal of Statistics on Health Decision
Year: 2021

description: Journal of Statistics on Health Decision, vol. 3 n.º 1 (2021): Special Issue - Statistics on Health Decision Making: Public Health
Supercritical degenerate parabolic-parabolic Keller-Segel system -- existence criterion given by the best constant in Sobolev's inequality
Creators: name: Wang, Jinhuan
name: Li, Yue
name: Chen, Li
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: This article presents a relationship between the sharp constant of the Sobolev inequality and the initial criterion to the global existence of degenerate parabolic-parabolic Keller-Segel system with the diffusion exponent $\frac{2n}{2+n}
Active Disk Architecture for Databases (CMU-CS-00-145)
Creators: name: E.  Riedel
name: C.  Faloutsos
name: D. F. Nagle
Publisher: name: Carnegie Mellon University
Year: 2000
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: Today's commodity disk drives, the basic unit of storage for computer systems large and small, are actually small computers, with a processor, memory and a network connection, in addition to the spinning magnetic material that stores the data. Large collections of data are becoming larger, and people are beginning to analyze, rather than simply store-and-forget, these masses of data. At the same time, advances in I/O performance have lagged the rapid development of commodity processor and memory technology. This paper describes the use of Active Disks to take advantage of the processing power on individual disk drives to run a carefully chosen portion of a relational database system. Moving a portion of the database processing to execute directly at the disk drives improves performance by: 1) dramatically reducing data traffic; and 2) exploiting the parallelism in large storage systems. It provides a new point of leverage to overcome the I/O bottleneck. This paper discusses how to map all the basic database operations - select, project, and join - onto an Active Disk system. The changes required are small and the performance gains are dramatic. A prototype based on the Postgres database system demonstrates a factor of 2x performance improvement on a small system using a portion of the TPC-D decision support benchmark, with the promise of larger improvements in more realistically-sized systems.
The Broad-lined Type Ic SN 2003jd
Creators: name: Valenti, S.
name: Benetti, S.
name: Cappellaro, E.
name: Patat, F.
name: Mazzali, P.
name: Turatto, M.
name: Hurley, K.
name: Maeda, K.
name: Gal-Yam, A.
name: Foley, R. J.
name: Filippenko, A. V.
name: Pastorello, A.
name: Challis, P.
name: Frontera, F.
name: Harutyunyan, A.
name: Iye, M.
name: Kawabata, K.
name: Kirshner, R. P.
name: Li, W.
name: Lipkin, Y. M.
name: Matheson, T.
name: Nomoto, K.
name: Ofek, E. O.
name: Ohyama, Y.
name: Pian, E.
name: Salvo, M.
name: Sauer, D. N.
name: Schmidt, B. P.
name: Soderberg, A.
name: Zampieri, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The results of a world-wide coordinated observational campaign on the broad-lined Type Ic SN 2003jd are presented. In total, 74 photometric data points and 26 spectra were collected using 11 different telescopes. SN 2003jd is one of the most luminous SN Ic ever observed. A comparison with other Type Ic supernovae (SNe Ic) confirms that SN 2003jd represents an intermediate case between broad-line events (2002ap, 2006aj), and highly energetic SNe (1997ef, 1998bw, 2003dh, 2003lw), with an ejected mass of M_{ej} = 3.0 +/- 1 Mo and a kinetic energy of E_{k}(tot) = 7_{-2}^{+3} 10^{51} erg. SN 2003jd is similar to SN 1998bw in terms of overall luminosity, but it is closer to SNe 2006aj and 2002ap in terms of light-curve shape and spectral evolution. The comparison with other SNe Ic, suggests that the V-band light curves of SNe Ic can be partially homogenized by introducing a time stretch factor. Finally, due to the similarity of SN 2003jd to the SN 2006aj/XRF 060218 event, we discuss the possible connection of SN 2003jd with a GRB.
description: 19 pages, 19 figures, Accepted for publication in MNRAS
Terms of Reference for the working group 'Security aspects of FAIR data collaboration'
Creators: name: Danish e-Infrastructure Consortium (DeiC)
Publisher: name: Zenodo
Year: 2024
Subjects: FAIR principles
National strategy
Denmark

description: Terms of reference for the working group 'Security aspects of FAIR data collaboration' in connection with the National Strategy for Data Management based on the FAIR principles. 

The working group is established based on the ‘Remit and Terms of Reference for the Reference group for the implementation of the National Strategy for Data Management Based on the FAIR Principles’.
title: 02_0246
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
The Body mass index in patients with Multiple Sclerosis: A meta-analysis
Creators: name: Castro, Laura Jesus Jorge Oliveira
name: Pereira, Alexandre
name: Ribeiro, Nuno
Publisher: name: Journal of Statistics on Health Decision
Year: 2021

description: This article is an update of a systematic review and meta-analysis related to BMI levels in patients with multiple sclerosis. 31 studies published between 1997 and 2020 were collected. The main objective of this meta-analysis was to compare BMI levels between patients with MS and healthy controls. We conclude that BMI appears to be significantly lower in patients with MS, compared to healthy controls. However, after a more detailed analysis of the available data, it was realized that there are studies that are not very consistent, affecting the heterogeneity of the analysis. This heterogeneity may be associated with several external factors, such as alcohol and tobacco consumption, which were not taken into account in all included studies. In addition to this, there are still other limitations to consider, due to the lack of detailed information on the characteristics, such as the type of MS, the duration of the disease, the EDSS score or ethnicity, among others. After reducing this heterogeneity it was concluded that contrary to what is described in the literature, BMI does not present significant differences between patients with MS and healthy controls.
description: Journal of Statistics on Health Decision, vol. 3 n.º 1 (2021): Special Issue - Statistics on Health Decision Making: Public Health