cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effective constrained polymeric theories and their continuum limit
Creators: name: Corichi, Alejandro
name: Vukasinac, Tatjana
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The classical limit of polymer quantum theories yields a one parameter family of `effective' theories labeled by λ. Here we consider such families for constrained theories and pose the problem of taking the `continuum limit', λ-> 0. We put forward criteria for such question to be well posed, and propose a concrete strategy based in the definition of appropriately constructed Dirac observables. We analyze two models in detail, namely a constrained oscillator and a cosmological model arising from loop quantum cosmology. For both these models we show that the program can indeed be completed, provided one makes a particular choice of λ-dependent internal time with respect to which the dynamics is described and compared. We show that the limiting theories exist and discuss the corresponding limit. These results might shed some light in the problem of defining a renormalization group approach, and its associated continuum limit, for quantum constrained systems.
description: 20 pages, 5 figures. Typos corrected, discussion expanded, references added. Version to be published in PRD
Spin diffusion of lattice fermions in one dimension
Creators: name: Snyder, Andrew P.
name: De Silva, Theja N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study long-time spin diffusion of harmonically trapped lattice fermions in one dimension. Combining thermodynamic Bethe ansatz approach and local density approximation, we calculate spin current and spin diffusion coefficient driven by the population imbalance. We find spin current is driven by susceptibility effects rather than typical diffusion where magnetization would transport from regions of high magnetization to low. As expected, spin transport is zero through insulating regions and are only present in the metallic regions. In the weak coupling limit, the local spin diffusion coefficient shows maxima at all the insulating regions. Further, we estimate damping rate of diffusion modes in the weak coupling limit within the lower metallic portion of the cloud. The predicted spin current pattern can be probed via currently available experimental techniques.
description: 7 pages, 4 figures
Neosclerus granulicollis CAMERON 1924
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Neosclerus
Neosclerus granulicollis

description: Neosclerus granulicollis CAMERON, 1924
 Additional material examined:
 Nepal: 2 , Tatopani, 1400 m, 25.IX.1977, leg. Deharveng (MHNG); 1 , Kosi, 2 km E Mangsingma, 1900 m, 19.IV.1984, leg. Löbl & Smetana (cAss).
 Comment:
The above specimens represent the first records from Nepal.
description: Published as part of Assing, Volker, 2011, A revision of the genus Neosclerus C. Supplement I (Coleoptera: Staphylinidae: Paederinae), pp. 149-153 in Beiträge Zur Entomologie = Contributions to Entomology 61 (1) on page 151, DOI: 10.21248/contrib.entomol.61.1.149-153, http://zenodo.org/record/10084468
Sheath parameters for non-Debye plasmas: simulations and arc damage
Creators: name: Morozov, Igor
name: Norman, Genri
name: Insepov, Zeke
name: Norem, Jim
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: This paper describes the surface environment of the dense plasma arcs that damage rf accelerators, tokamaks and other high gradient structures. We simulate the dense, non-ideal plasma sheath near a metallic surface using Molecular Dynamics (MD) to evaluate sheaths in the non-Debye region for high density, low temperature plasmas. We use direct two-component MD simulations where the interactions between all electrons and ions are computed explicitly. We find that the non-Debye sheath can be extrapolated from the Debye sheath parameters with small corrections. We find that these parameters are roughly consistent with previous PIC code estimates, pointing to densities in the range $10^{24} - 10^{25}\mathrm{m}^{-3}$. The high surface fields implied by these results could produce field emission that would short the sheath and cause an instability in the time evolution of the arc, and this mechanism could limit the maximum density and surface field in the arc. These results also provide a way of understanding how the "burn voltage" of an arc is generated, and the relation between self sputtering and the burn voltage, while not well understood, seems to be closely correlated. Using these results, and equating surface tension and plasma pressure, it is possible to infer a range of plasma densities and sheath potentials from SEM images of arc damage. We find that the high density plasma these results imply and the level of plasma pressure they would produce is consistent with arc damage on a scale 100 nm or less, in examples where the liquid metal would cool before this structure would be lost. We find that the sub-micron component of arc damage, the burn voltage, and fluctuations in the visible light production of arcs may be the most direct indicators of the parameters of the dense plasma arc, and the most useful diagnostics of the mechanisms limiting gradients in accelerators.
description: 8 pages, 16 figures
Learning the undecidable from networked systems
Creators: name: Abrahão, Felipe S.
name: D'Ottaviano, Ítala M. L.
name: Wehmuth, Klaus
name: Dória, Francisco Antônio
name: Ziviani, Artur
Publisher: name: Zenodo
Year: 2019
Subjects: distributed systems
halting problem
busy beaver function
hypercomputation
metabiology
synergy

description: This article presents a theoretical investigation of computation beyond the Turing barrier from emergent behavior in distributed systems. In particular, we present an algorithmic network that is a mathematical model of a networked population of randomly generated computable systems with a fixed communication protocol. Then, in order to solve an undecidable problem, we study how nodes (i.e., Turing machines or computable systems) can harness the power of the metabiological selection and the power of information sharing (i.e., communication) through the network. Formally, we show that there is a pervasive network topological condition, in particular, the small-diameter phenomenon, that ensures that every node becomes capable of solving the halting problem for every program with a length upper bounded by a logarithmic order of the population size. In addition, we show that this result implies the existence of a central node capable of emergently solving the halting problem in the minimum number of communication rounds. Furthermore, we introduce an algorithmic-informational measure of synergy for networked computable systems, which we call local algorithmic synergy. Then, we show that such algorithmic network can produce an arbitrarily large value of expected local algorithmic synergy.
An interactive simulation model to compare an autonomous haulage truck system with a manually-operated system
Creators: name: Parreira, Juliana
Publisher: name: University of British Columbia
Year: 2013

description: This thesis presents a deterministic/stochastic model that was created to compare an Autonomous Haulage System (AHS) to a manual system by calculating and estimating benchmarked Key Performance Indicators (KPIs) such as productivity, safety, breakdown frequencies, maintenance costs, labour costs, fuel consumption, tire wear, and haulage cycle times. The manual system was verified against data provided by a major international mining company which cannot be identified for confidentiality reasons over a period of operation from Feb. 12 to Feb. 15, 2010. The mine that contributed the necessary data cannot be identified. For purposes of discussion, the mine is referred to as the Lucy mine in this thesis. Only a portion of the Lucy mine haulage system is modeled in this work with two shovels digging ore and waste to achieve a stripping ratio of 0.5. The results show that an autonomous haulage system is able to increase either production or productivity by 21.3% due to increased utilization. The autonomous mode shows an improvement in fuel consumption of 5.3% for L/cycle and 6.1% for L/t. Tire wear (mm/cycle) also shows an improvement of 7.6%. Although AHS trucks drive slower than normal drivers, the cycle time is shorter than manual because manual breaks involve assembling at the parking lot for safety purposes. A decrease in queuing time also occurred because of increased driving consistency. The AHS fleet queuing time decreased by 28.7% compared to the manual system. An economic assessment of an AHS system versus a manual fleet shows an after-tax incremental discounted cash flow rate of return of 48.7% in comparing a 7- truck AHS fleet with a 9-truck manual system both of which were designed to achieve equivalent production.
Tiber Personal Rapid Transit
Creators: name: D'agostino, Diego Carlo
Publisher: name: Tema. Journal of Land Use, Mobility and Environment
Year: 2011
Subjects: Personal Rapid Transit; urban design; public transport

description: The project “Tiber Personal Rapid Transit” have been presented by the author at the Rome City Vision Competition1 2010, an ideas competition, which challenges architects, engineers, designers, students and creatives individuals to develop visionary urban proposals with the intention of stimulating and supporting the contemporary city, in this case Rome. The Tiber PRT proposal tries to answer the competition questions with the definition of a provocative idea: a Personal Rapid transit System on the Tiber river banks. The project is located in the central section of the Tiber river and aims at the renewal of the river banks with the insertion of a Personal Rapid Transit infrastructure. The project area include the riverbank of Tiber from Rome Transtevere RFI station to Piazza del Popolo, an area where main touristic and leisure attractions are located. The intervention area is actually no used by the city users and residents and constitute itself a strong barrier in the heart of the historic city.
description: Tema. Journal of Land Use, Mobility and Environment, Vol 3, N° 4 (2010): Small/Large Urban Projects
Learning the undecidable from networked systems
Creators: name: Abrahão, Felipe S.
name: Dória, Francisco Antônio
name: Zenil, Hector
name: D'Ottaviano, Ítala M. L.
name: Wehmuth, Klaus
name: Ziviani, Artur
Publisher: name: Zenodo
Year: 2019

description: This article presents a theoretical investigation of hypercomputation from emergent behavior in distributed (or parallel) systems.

    In particular, we present an algorithmic network that is an abstract mathematical model of a networked population of randomly generated Turing machines with a fixed communication protocol.

    Then, in order to solve an undecidable problem, we study how nodes (i.e., Turing machines or computable systems) can harness the power of the metabiological selection of the fittest and the power of information sharing (i.e., communication) through the network.

    Formally, we show that there are pervasive network topological conditions that ensure the existence of a central node capable of solving the halting problem for every program with a length upper bounded by a logarithmic order of the population size.

    We also discuss the implications of such emergent phenomena on synergistic versus evolutionary paradigms in complex systems.
Test of the weak cosmic censorship conjecture with a charged scalar field and dyonic Kerr-Newman black holes
Creators: name: Toth, Gabor Zsolt
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A thought experiment considered recently in the literature, in which it is investigated whether a dyonic Kerr-Newman black hole can be destroyed by overcharging or overspinning it past extremality by a massive complex scalar test field, is revisited. Another derivation of the result that this is not possible, i.e. the weak cosmic censorship is not violated in this thought experiment, is given. The derivation is based on conservation laws, on a null energy condition, and on specific properties of the metric and the electromagnetic field of dyonic Kerr-Newman black holes. The metric is kept fixed, whereas the dynamics of the electromagnetic field is taken into account. A detailed knowledge of the solutions of the equations of motion is not needed. The approximation in which the electromagnetic field is fixed is also considered, and a derivation for this case is also given. In addition, an older version of the thought experiment, in which a pointlike test particle is used, is revisited. The same result, namely the non-violation of the cosmic censorship, is rederived in a way which is simpler than in earlier works.
description: 18 pages, LaTeX
Symbolic integration with respect to the Haar measure on the unitary group
Creators: name: Puchała, Zbigniew
name: Miszczak, Jarosław Adam
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Symbolic Computation (cs.SC)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: I.1.1
subject: 68W30 (Primary), 28C10, 97N80 (Secondary)

description: We present IntU package for Mathematica computer algebra system. The presented package performs a symbolic integration of polynomial functions over the unitary group with respect to unique normalized Haar measure. We describe a number of special cases which can be used to optimize the calculation speed for some classes of integrals. We also provide some examples of usage of the presented package.
description: 7 pages, two columns, published version, software available at: https://github.com/iitis/IntU
Ptycholoma lecheana
Creators: name: Maharramova, Sheyda
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Tortricidae
Ptycholoma
Ptycholoma lecheana

description: Ptycholoma lecheana (LINNAEUS, 1758)
 Specimens examined:
 Azerbaijan: Absheron penins., Merdekan settl., 22 May 2001, Q.. castaneifolia, 1 .
Early instars skeletonize leaves; later instars damage buds, flowers, and newly emerged leaves. Larvae join several new leaves by silk and feed inside.
description: Published as part of Maharramova, Sheyda, 2011, Characterization of leaf-rollers attacking forest and fruit trees in Azerbaijan (Lepidoptera: Tortricidae), pp. 223-238 in Beiträge Zur Entomologie = Contributions to Entomology 61 (1) on page 228, DOI: 10.21248/contrib.entomol.61.1.223-238, http://zenodo.org/record/10084494
Resonances in sinh- and sine-Gordon models and higher equations of motion in Liouville theory
Creators: name: Lashkevich, Michael
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The notion of operator resonances was introduced earlier by Al. Zamolodchikov within the framework of the conformal perturbation theory. The resonances are related to logarithmic divergences of integrals in the perturbation expansion, and manifest themselves in poles of the correlation functions and form factors of local operators considered as functions of conformal dimensions. The residues of the poles can be computed by means of some operator identities. Here we study the resonances in the Liouville, sinh- and sine-Gordon models, considered as perturbations of a massless free boson. We show that the well-known higher equations of motion discovered by Al. Zamolodchikov in the Liouville field theory are nothing but resonance identities for some descendant operators. The resonance expansion in the vicinity of a resonance point provides a regularized version of the corresponding operators. We try to construct the corresponding resonance identities and resonance expansions in the sinh- and sine-Gordon theories. In some cases it can be done explicitly, but in most cases we are only able to obtain a general form so far. We show nevertheless that the resonances are perturbatively exact, which means that each of them only appears in a single term of the perturbation theory.
description: 22 pages, no figures; v2: no changes, a misprint in metadata corrected; v3: a new appendix added, numerous misprints corrected; v4: minor changes; v5: eq. (4.8) corrected
A new approach to the optimization of the extraction of astrometric and photometric information from multi-wavelength images in cosmological fields
Creators: name: Marquez, Maria Jose
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This paper describes a new approach to the optimization of information extraction in multi-wavelength image cubes of cosmological fields. The objective is to create a framework for the automatic identification and tagging of sources according to various criteria (isolated source, partially overlapped, fully overlapped, cross-matched, etc) and to set the basis for the automatic production of the SEDs (spectral energy distributions) for all objects detected in the many multi-wavelength images in cosmological fields.In order to do so, a processing pipeline is designed that combines Voronoi tessellation, Bayesian cross-matching, and active contours to create a graph-based representation of the cross-match probabilities. This pipeline produces a set of SEDs with quality tags suitable for the application of already-proven data mining methods. The pipeline briefly described here is also applicable to other astrophysical scenarios such as star forming regions.
description: GREAT Workshop. This paper will be published in Springer as part of the proceedings for the GREAT Workshop
High Speed and High Efficiency Travelling Wave Single-Photon Detectors Embedded in Nanophotonic Circuits
Creators: name: Pernice, W.
name: Schuck, C.
name: Minaeva, O.
name: Li, M.
name: Goltsman, G. N.
name: Sergienko, A. V.
name: Tang, H. X.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Ultrafast, high quantum efficiency single photon detectors are among the most sought-after elements in modern quantum optics and quantum communication. High photon detection efficiency is essential for scalable measurement-based quantum computation, quantum key distribution, and loophole-free Bell experiments. However, imperfect modal matching and finite photon absorption rates have usually limited the maximum attainable detection efficiency of single photon detectors. Here we demonstrate a superconducting nanowire detector atop nanophotonic waveguides which allows us to drastically increase the absorption length for incoming photons. When operating the detectors close to the critical current we achieve high on-chip single photon detection efficiency up to 91% at telecom wavelengths, with uncertainty dictated by the variation of the waveguide photon flux. We also observe remarkably low dark count rates without significant compromise of detection efficiency. Furthermore, our detectors are fully embedded in a scalable silicon photonic circuit and provide ultrashort timing jitter of 18ps. Exploiting this high temporal resolution we demonstrate ballistic photon transport in silicon ring resonators. The direct implementation of such a detector with high quantum efficiency, high detection speed and low jitter time on chip overcomes a major barrier in integrated quantum photonics.
Aleimma loeflingiana
Creators: name: Maharramova, Sheyda
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Tortricidae
Aleimma
Aleimma loeflingiana

description: Aleimma loeflingiana (LINNAEUS, 1758)
 Specimens examined:
 Azerbaijan: Lenkeran District, 24 June 2003, Q.. castaneifolia, 1 .
The caterpillar wraps leaves from the main rib to the lower face obliquely and ties them with silk.
description: Published as part of Maharramova, Sheyda, 2011, Characterization of leaf-rollers attacking forest and fruit trees in Azerbaijan (Lepidoptera: Tortricidae), pp. 223-238 in Beiträge Zur Entomologie = Contributions to Entomology 61 (1) on page 228, DOI: 10.21248/contrib.entomol.61.1.223-238, http://zenodo.org/record/10084494
Care, gender inequality and resistance : a Foucauldian reading of Carol Gilligan’s ethic of care
Creators: name: Levesque, Gabrielle
Publisher: name: University of British Columbia
Year: 2013

description: Through a Foucauldian reading of Carol Gilligan’s ethic of care, this essay answers the following question: How can we explain the persistence of gender inequality in Western ‘post-sexist’ countries where formal equality has been achieved, and what should be done in order to eradicate these inequalities? A Foucauldian reading of Gilligan’s work can enhance our understanding of the mechanisms of power that continue to oppress women in ‘post-sexist’ countries, and the ‘tools’ in later Foucault’s work can be used in order to develop a project of resistance against gender inequalities. In the first part, I join to Gilligan’s work the key concepts of the Foucauldian genealogy of the subject in order to demonstrate how these concepts can help to explain the constitution of the ‘female gendered self’ under capitalist patriarchy and to highlight the mechanisms of power that reproduce gender inequalities. I demonstrate that a key factor that explains these inequalities is the discrepancy between this ‘female gendered self’ and the values that are rewarded by patriarchy. In the second part, I use the tools present in Foucault’s later works about ethic and the care of the self, especially the concepts of ‘techniques of the self’ and ‘practices of freedom’, to explain how these mechanisms of power could be changed so that gender relations would become more equal. I argue that women have to change their current normalizing techniques of the self related to care into practices of freedom, for example through consciousness-raising, in order to develop a political project against gender inequalities.
Races among products
Creators: name: Berkovich, Alexander
name: Grizzell, Keith
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11P83 (Primary) 11P81, 11P82, 11P84, 05A17, 05A19, 05A20 (Secondary)

description: We will revisit a 1987 question of Rabbi Ehrenpreis. Among many things, we will provide an elementary injective proof that P_1(L,y,n)>=P_2(L,y,n) for any L,n>0 and any odd y>1 . Here, P_1(L,y,n) denotes the number of partitions of n into parts congruent to 1, y+2, or 2y mod 2(y+1) with the largest part not exceeding 2(y+1)L-2 and P_2(L,y,n) denotes the number of partitions of n into parts congruent to 2, y, or 2y+1 mod 2(y+1) with the largest part not exceeding 2(y+1)L-1.
description: 9 pages, 1 table
Multiferroic FeTe$_2$O$_5$Br: Alternating spin chains with frustrated interchain interactions
Creators: name: Pregelj, M.
name: Jeschke, H. O.
name: Feldner, H.
name: Valentí, R.
name: Honecker, A.
name: Saha-Dasgupta, T.
name: Das, H.
name: Yoshii, S.
name: Morioka, T.
name: Nojiri, H.
name: Berger, H.
name: Zorko, A.
name: Zaharko, O.
name: Arčon, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A combination of density functional theory calculations, many-body model considerations, magnetization and electron spin resonance measurements shows that the multiferroic FeTe$_2$O$_5$Br should be described as a system of alternating antiferromagnetic $S=5/2$ chains with strong Fe-O-Te-O-Fe bridges weakly coupled by two-dimensional frustrated interactions, rather than the previously reported tetramer models. The peculiar temperature dependence of the incommensurate magnetic vector can be explained in terms of interchain exchange striction being responsible for the emergent net electric polarization.
description: 7 pages, 6 figures
Conformal Blocks for the 4-Point Function in Conformal Quantum Mechanics
Creators: name: Jackiw, R.
name: Pi, S. -Y.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Extending previous work on 2 -- and 3 -- point functions, we study the 4 -- point function and its conformal block structure in conformal quantum mechanics CFT$_1$, which realizes the SO(2,1) symmetry group. Conformal covariance is preserved even though the operators with which we work need not be primary and the states are not conformally invariant. We find that only one conformal block contributes to the four-point function. We describe some further properties of the states that we use and we construct dynamical evolution generated by the compact generator of SO(2.1).
description: Formula for 4-point function is corrected and generalized
Invariants of orbit equivalence relations and Baumslag-Solitar groups
Creators: name: Kida, Yoshikata
Publisher: name: arXiv
Year: 2011
Subjects: subject: Group Theory (math.GR)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 20E06, 20E08, 37A20

description: To an ergodic, essentially free and measure-preserving action of a non-amenable Baumslag-Solitar group on a standard probability space, a flow is associated. The isomorphism class of the flow is shown to be an invariant of such actions of Baumslag-Solitar groups under weak orbit equivalence. Results on groups which are measure equivalent to Baumslag-Solitar groups are also provided.
description: 49 pages, minor corrections
A duality principle for selection games
Creators: name: Levine, Lionel
name: Sheffield, Scott
name: Stange, Katherine E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 91A10, 91A18, 91A06, 91A50

description: A dinner table seats k guests and holds n discrete morsels of food. Guests select morsels in turn until all are consumed. Each guest has a ranking of the morsels according to how much he would enjoy eating them; these rankings are commonly known. A gallant knight always prefers one food division over another if it provides strictly more enjoyable collections of food to one or more other players (without giving a less enjoyable collection to any other player) even if it makes his own collection less enjoyable. A boorish lout always selects the morsel that gives him the most enjoyment on the current turn, regardless of future consumption by himself and others. We show the way the food is divided when all guests are gallant knights is the same as when all guests are boorish louts but turn order is reversed. This implies and generalizes a classical result of Kohler and Chandrasekaran (1971) about two players strategically maximizing their own enjoyments. We also treat the case that the table contains a mixture of boorish louts and gallant knights. Our main result can also be formulated in terms of games in which selections are made by groups. In this formulation, the surprising fact is that a group can always find a selection that is simultaneously optimal for each member of the group.
description: 8 pages, 2 figures
A Comprehensive Study of Gamma-Ray Burst Optical Emission: I. Flares and Early Shallow Decay Component
Creators: name: Li, Liang
name: Liang, En-Wei
name: Tang, Qing-Wen
name: Chen, Jie-Min
name: Xi, Shao-Qiang
name: LV, Hou-Jun
name: Gao, He
name: Zhang, Bing
name: Zhang, Jin
name: Yi, Shuang-Xi
name: Lu, Rui-Jing
name: LV, Lian-Zhong
name: Wei, Jian-Yan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Well-sampled optical lightcurves of 146 gamma-ray bursts (GRBs) are compiled from the literature. By empirical fitting we identify eight possible emission components and summarize the results in a "synthetic" lightcurve. Both optical flare and early shallow-decay components are likely related to long-term central engine activities. We focus on their statistical properties in this paper. Twenty-four optical flares are obtained from 19 GRBs. The isotropic R-band energy is smaller than 1% of $E_{γ, \rm iso}$. The relation between isotropic luminosities of the flares and gamma-rays follows $L^{\rm F}_{\rm R, iso}\propto L_{γ, \rm iso}^{1.11\pm 0.27}$. Later flares tend to be wider and dimmer, i.e., $w^{\rm F}\sim t^{\rm F}_{\rm p}/2$ and $L^{\rm F}_{\rm R, iso}\propto [t^{\rm F}_{\rm p}/(1+z)]^{-1.15\pm0.15}$. The detection probability of the optical flares is much smaller than that of X-ray flares. An optical shallow decay segment is observed in 39 GRBs. The relation between the break time and break luminosity is a power-law, with an index of $-0.78\pm 0.08$, similar to that derived from X-ray flares. The X-ray and optical breaks are usually chromatic, but a tentative correlation is found. We suggest that similar to the prompt optical emission that tracks $γ$-rays, the optical flares are also related to the erratic behavior of the central engine. The shallow decay component is likely related to a long-lasting spinning-down central engine or piling up of flare materials onto the blastwave. Mixing of different emission components may be the reason of the diverse chromatic afterglow behaviors.
description: 43 pages, 13 figures, 3 tables, accepted for publication in ApJ
Jahresbericht des Römisch-Germanischen Zentralmuseums, Forschungsinstitut für Vor- und Frühgeschichte, 1992
Creators: name: Redaktion, Die
Publisher: name: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz
Year: 2021

description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 39 Nr. 2 (1992)
Axino Cold Dark Matter Revisited
Creators: name: Choi, Ki-Young
name: Covi, Laura
name: Kim, Jihn E.
name: Roszkowski, Leszek
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Axino arises in supersymmetric versions of axion models and is a natural candidate for cold or warm dark matter. Here we revisit axino dark matter produced thermally and non-thermally in light of recent developments. First we discuss the definition of axino relative to low energy axion one for several KSVZ and DFSZ models of the axion. Then we review and refine the computation of the dominant QCD production in order to avoid unphysical cross-sections and, depending on the model, to include production via SU(2) and U(1) interactions and Yukawa couplings.
description: 30 pages, 10 figures, version accepted by JHEP
Mainzer »Augustus« - 30 Jahre Gelehrtenstreit
Creators: name: Frenz, Hans G.
Publisher: name: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz
Year: 2021

description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 39 Nr. 2 (1992)
Proof of the Arnold chord conjecture in three dimensions II
Creators: name: Hutchings, Michael
name: Taubes, Clifford Henry
Publisher: name: arXiv
Year: 2011
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: In "Proof of the Arnold chord conjecture in three dimensions I", we deduced the Arnold chord conjecture in three dimensions from another result, which asserts that an exact symplectic cobordism between contact three-manifolds induces a map on (filtered) embedded contact homology satisfying certain axioms. The present paper proves the latter result, thus completing the proof of the three-dimensional chord conjecture. We also prove that filtered embedded contact homology does not depend on the choice of almost complex structure used to define it.
description: v2 has minor corrections; to appear in Geometry and Topology
title: Optimisation of patient doses in intraoral and panoramic dental radiography
Creators: name: Laurikaitiene, Jurgita
Publisher: name: ESR EuroSafe Imaging
Year: 2019
Subjects: subject: Action 4 - Dose management systems
subject: Action 8 - Radiation protection training and learning material
subject: Head and neck
subject: Digital radiography
subject: Diagnostic procedure
subject: Dosimetry
subject: Radiation effects
subject: Quality assurance
subject: Toxicity

description: Background/introduction Description of activity and work performed Conclusion and recommendations Personal/organisational information References
description: Background/introduction: Introduction. The most recently performed dental examinations show the necessity for the optimization of patients’ doses, since even very low doses may cause delayed somatic effects, which in turn may be responsible for the induction of the...
Product vacua with boundary states
Creators: name: Bachmann, Sven
name: Nachtergaele, Bruno
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a family of quantum spin chains with nearest-neighbor interactions that can serve to clarify and refine the classification of gapped quantum phases of such systems. The gapped ground states of these models can be described as a product vacuum with a finite number of particles bound to the edges. The numbers of particles, n_L and n_R, that can bind to the left and right edges of the finite chains serve as indices of the particular phase a model belongs to. All these ground states, which we call Product Vacua with Boundary States (PVBS) can be described as Matrix Product States (MPS). We present a curve of gapped Hamiltonians connecting the AKLT model to its representative PVBS model, which has indices n_L=n_R=1. We also present examples with n_L=n_R=J, for any integer J\geq 1, that are related to a recently introduced class of SO(2J+1)-invariant quantum spin chains.
description: New section on SO(2J+1)-invariant models
title: General Considerations and Criteria for Procurement of a Dose Management System
Creators: name: Do, Thuy Duong
Publisher: name: ESR EuroSafe Imaging
Year: 2019
Subjects: subject: Action 4 - Dose management systems
subject: eHealth
subject: CT
subject: Decision analysis
subject: Dosimetry
subject: Dosimetric comparison
subject: Quality assurance

description: Background/introduction Description of activity and work performed Conclusion and recommendations Personal/organisational information References
description: Background/introduction: In 2013 new guidelines on radiation safety were released by the European Atomic Energy Community (EUROATOM) (1). The guidelines released by the EUROATOM are standardized regulations on medical radiations that are binding for each European member...
Cómo comunicamos 2022-2023
Creators: name: MetaDocencia Team
Publisher: name: Zenodo
Year: 2023
Subjects: Comunidad
Community Building
comunication
redes sociales
social media

description: Este plan de comunicación apunta a fundamentar la planificación de canales y mensajes para el período 2022-2023, teniendo como objetivos aumentar el tamaño de la comunidad, ampliar las temáticas de nuestros contenidos y reforzar el reconocimiento de nuestra identidad, promoviendo la participación de nuestra comunidad.
Epinotia demarniana
Creators: name: Maharramova, Sheyda
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Tortricidae
Epinotia
Epinotia demarniana

description: Epinotia demarniana (FISCHER VON RÖSLERSTAMM, 1840)
 Specimens examined:
 Azerbaijan: Lenkeran District, Hirkan National Park, 1 June 2001, Alnus barbata, 1 ; Lenkeran District, Hirkan National Park, 1 June 2001, A. barbata, 1 .
description: Published as part of Maharramova, Sheyda, 2011, Characterization of leaf-rollers attacking forest and fruit trees in Azerbaijan (Lepidoptera: Tortricidae), pp. 223-238 in Beiträge Zur Entomologie = Contributions to Entomology 61 (1) on page 231, DOI: 10.21248/contrib.entomol.61.1.223-238, http://zenodo.org/record/10084494
A first take in the AtLAST Operations Plan
Creators: name: Montenegro-Montes, Francisco Miguel
name: Evanthia Hatziminaoglou
Publisher: name: Zenodo
Year: 2024

description: This presentation will provide an overview of the work conducted during the design studies phase to formulate an Operations plan for AtLAST. Our vision entails a streamlined, high-performance, automated operations model centered on remote service-mode observations. Drawing from experience gained in operating large astronomical facilities in remote locations, we have crafted a contemporary framework that prioritizes operational safety, sustainability, transparency, diversity, and community engagement as fundamental principles.
title: Challenges in Computed Tomography of the Head – Achieving Diagnostic Quality while Adhering to New Dose Level References
Creators: name: Do, Thuy Duong
Publisher: name: ESR EuroSafe Imaging
Year: 2019
Subjects: subject: Action 2 - Clinical diagnostic reference levels (DRLs)
subject: Action 3 - Image quality assessment based on clinical indications
subject: Head and neck
subject: CT
subject: Technical aspects
subject: Safety
subject: Quality assurance
subject: Dosimetric comparison

description: Background/introduction Description of activity and work performed Conclusion and recommendations Personal/organisational information References
description: Background/introduction: The new dose level references were released by the German Federal Office for Radiation Protection in June 2016 including for a routine head CT. The dose level references for the adult brain were drastically reduced, i.e. the CTDI vol from 65 mGy to...
SPT-CL J0205-5829: A z = 1.32 Evolved Massive Galaxy Cluster in the South Pole Telescope Sunyaev-Zel'dovich Effect Survey
Creators: name: Stalder, B.
name: Ruel, J.
name: Suhada, R.
name: Brodwin, M.
name: Aird, K. A.
name: Andersson, K.
name: Armstrong, R.
name: Ashby, M. L. N.
name: Bautz, M.
name: Bayliss, M.
name: Bazin, G.
name: Benson, B. A.
name: Bleem, L. E.
name: Carlstrom, J. E.
name: Chang, C. L.
name: Cho, H. M.
name: Clocchiatti, A.
name: Crawford, T. M.
name: Crites, A. T.
name: de Haan, T.
name: Desai, S.
name: Dobbs, M. A.
name: Dudley, J. P.
name: Foley, R. J.
name: Forman, W. R.
name: George, E. M.
name: Gettings, D.
name: Gladders, M. D.
name: Gonzalez, A. H.
name: Halverson, N. W.
name: Harrington, N. L.
name: High, F. W.
name: Holder, G. P.
name: Holzapfel, W. L.
name: Hoover, S.
name: Hrubes, J. D.
name: Jones, C.
name: Joy, M.
name: Keisler, R.
name: Knox, L.
name: Lee, A. T.
name: Leitch, E. M.
name: Liu, J.
name: Lueker, M.
name: Luong-Van, D.
name: Mantz, A.
name: Marrone, D. P.
name: McDonald, M.
name: McMahon, J. J.
name: Mehl, J.
name: Meyer, S. S.
name: Mocanu, L.
name: Mohr, J. J.
name: Montroy, T. E.
name: Murray, S. S.
name: Natoli, T.
name: Nurgaliev, D.
name: Padin, S.
name: Plagge, T.
name: Pryke, C.
name: Reichardt, C. L.
name: Rest, A.
name: Ruhl, J. E.
name: Saliwanchik, B. R.
name: Saro, A.
name: Sayre, J. T.
name: Schaffer, K. K.
name: Shaw, L.
name: Shirokoff, E.
name: Song, J.
name: Spieler, H. G.
name: Stanford, S. A.
name: Staniszewski, Z.
name: Stark, A. A.
name: Story, K.
name: Stubbs, C. W.
name: van Engelen, A.
name: Vanderlinde, K.
name: Vieira, J. D.
name: Vikhlinin, A.
name: Williamson, R.
name: Zahn, O.
name: Zenteno, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The galaxy cluster SPT-CL J0205-5829 currently has the highest spectroscopically-confirmed redshift, z=1.322, in the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey. XMM-Newton observations measure a core-excluded temperature of Tx=8.7keV producing a mass estimate that is consistent with the Sunyaev-Zel'dovich derived mass. The combined SZ and X-ray mass estimate of M500=(4.9+/-0.8)e14 h_{70}^{-1} Msun makes it the most massive known SZ-selected galaxy cluster at z>1.2 and the second most massive at z>1. Using optical and infrared observations, we find that the brightest galaxies in SPT-CL J0205-5829 are already well evolved by the time the universe was <5 Gyr old, with stellar population ages >3 Gyr, and low rates of star formation (<0.5Msun/yr). We find that, despite the high redshift and mass, the existence of SPT-CL J0205-5829 is not surprising given a flat LambdaCDM cosmology with Gaussian initial perturbations. The a priori chance of finding a cluster of similar rarity (or rarer) in a survey the size of the 2500 deg^2 SPT-SZ survey is 69%.
description: 11 pages, 5 figures, submitted to ApJ
D5.5 Policy Brief: Recommendations for Youth Citizen Social Science and Future Policymaking for Social Inclusion of Youth
Creators: name: Lorenz, Usue
name: Norvoll, Reidun
name: Gatti, Flora
name: Hagen, Aina Landverk
name: Procentese, Fortuna
name: Ridley, Julie
name: Turda, Maria
name: Wilson, Suzanne
Publisher: name: Zenodo
Year: 2024
Subjects: European Union
Horizon 2020
YouCount project
Youth Citizen Social Science
Social inclusion
Youth
Social Inclusion
Social Innovation
Policymaking
Policy Brief

description: It is imperative to incorporate the viewpoints of young people to enhance the policy-making process for youth social inclusion. The voices of young citizen social scientists (13–29 years old) who participated in the EU-funded YouCount project are shared in this policy brief. They discuss how social inclusion for youth might be achieved and identify critical issues for social inclusion. They also discuss what social inclusion means to them. The brief also highlights possible motivators for social inclusion and the effects of applying a youth citizen social science to address social inclusion, building on the conclusions from YouCount's research. Several recommendations are also included for policymakers who wish to adopt youth citizen social science and embrace youth viewpoints for youth social inclusion. Finally, the brief includes example of one out of ten hands-on youth citizen science projects conducted within the YouCount project. This example illustrates how engaging young citizen scientists in youth citizen social science has raised important issues about youth social innovation in Norway, that they have also tackled by involving themselves in co-creative problem-solving efforts.
title: How Flood Hazard Maps Improve the Understanding of Ecologically Active Floodplains
Creators: name: Natho, Stephanie Natho
Year: 2021
Subjects: subject: 690 Hausbau, Bauhandwerk

description: Floodplains are threatened ecosystems and are not only ecologically meaningful but also important for humans by creating multiple benefits. Many underlying functions, like nutrient retention, carbon sequestration or water regulation, strongly depend on regular inundation. So far, these are approached on the basis of what are called ‘active floodplains’. Active floodplains, defined as statistically inundated once every 100 years, represent less than 10% of a floodplain’s original size. Still, should this remaining area be considered as one homogenous surface in terms of floodplain function, or are there any alternative approaches to quantify ecologically active floodplains? With the European Flood Hazard Maps, the extent of not only medium floods (T-medium) but also frequent floods (T-frequent) needs to be modelled by all member states of the European Union. For large German rivers, both scenarios were compared to quantify the extent, as well as selected indicators for naturalness derived from inundation. It is assumed that the more naturalness there is, the more inundation and the better the functioning. Real inundation was quantified using measured discharges from relevant gauges over the past 20 years. As a result, land uses indicating strong human impacts changed significantly from T-frequent to T-medium floodplains. Furthermore, the extent, water depth and water volume stored in the T-frequent and T-medium floodplains is significantly different. Even T-frequent floodplains experienced inundation for only half of the considered gauges during the past 20 years. This study gives evidence for considering regulation functions on the basis of ecologically active floodplains, meaning in floodplains with more frequent inundation that T-medium floodplains delineate.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1147
Can fatherhood be a turning-point opportunity for street-involved youth?
Creators: name: Drozda, Christopher
Publisher: name: University of British Columbia
Year: 2013

description: Although street-involved youth report pregnancy at higher rates than youth in school, there is almost no research on street-involved teen fathers. This study had two objectives. The first objective was to provide a description of the background and current situations of street-involved youth in Western Canada who were fathers compared to their street-involved peers without children. The second objective was to investigate if fatherhood could be a potential turning-point opportunity for street-involved youth. Research with adolescent street-involved mothers and adolescent fathers has shown that parenthood could reduce alcohol or drug use, increase connection to employment and connection to treatment. The results did not support fatherhood as a potential turning-point opportunity for street-involved youth. Street-involved fathers were almost a year older and were street-involved at a younger age than non-fathers. Almost 20% of fathers reported their children lived with them. Fathers were more likely to report precarious housing, i.e., on the street or in a tent. Street-involved fathers were more likely to have been told they have Fetal Alcohol Syndrome. Street-involved fathers were less likely to be currently attending school. However, they were more likely to report working in a legal job than non-fathers or to obtain money from income assistance and from being a youth in care than non-fathers. Street-involved fathers reported higher prevalence of recent illicit drug use compared to non-fathers for several drugs, including crystal meth and ketamine. However, street-involved fathers were also more likely to have accessed some form of substance abuse treatment, including detox and inpatient treatment centres. Given their challenges, it was not surprising that street-involved fathers were more pessimistic about their future. They were significantly more likely than non-fathers to expect to be dead in five years. Despite the lack of evidence for fatherhood as a turning-point opportunity for street-involved youth, this study provided descriptions of street-involved fathers’ circumstances that social workers may face when engaging with these young men. Of particular note for further research are fathers whose children live with them. There may be distinct needs for this group which could be addressed through development of services or changes in current programs for street-involved youth.
title: Establishing diagnostic reference levels of CT examinations at local university hospital's radiology department in Hungary
Creators: name: Balázs, Ervin
Publisher: name: ESR EuroSafe Imaging
Year: 2019
Subjects: subject: Action 2 - Clinical diagnostic reference levels (DRLs)
subject: Action 4 - Dose management systems
subject: Radioprotection / Radiation dose
subject: CT
subject: Dosimetry
subject: Dosimetric comparison

description: Background/introduction Description of activity and work performed Conclusion and recommendations Personal/organisational information References
description: Background/introduction: Radiation safety is one of the most emerging issues in radiology. Computer tomography is responsible for a large amount of radiation exposure to patients, but due to its availability and versatile practical applications, it is an indispensable...