cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multiagentensysteme für die kooperative Transdisposition : Das soziotechnische Rationalisierungspotential der Verteilten Künstlichen Intelligenz (VKI)
Creators: name: Florian, Michael
Publisher: name: TUHH Universitätsbibliothek
Year: 1998
Subjects: subject: Logistiknetzwerk
subject: Transportprozess
subject: Multiagenten-Technologie
subject: multi-agent systems
subject: multi-agent technology
subject: transportation domain
subject: 004: Informatik
subject: Mehragentensystem
subject: Verkehrsbetrieb
subject: Transport
subject: Logistik / Unternehmen
subject: Agent
subject: 004
subject: I.2.11:Distributed Artificial Intelligence
subject: I.2.11

description: In der vorliegenden Studie geht es darum, das soziotechnische Rationsalisierungspotential der Multiagenten-Technologie - einem Forschungsgebiet der Verteilten Künstlichen Intelligenz (VKI) - für die kooperative Disposition von Transportabläufen einzuschätzen. Im Vergleich zu konventionellen Softwareprogrammen, die mit mathematischen Optimierungsprogrammen des Operations Research arbeiten, sind Multiagentensysteme stärker an den praktischen Anforderungen der Transportdisposition ausgerichtet und bieten dabei ein soziotechnisch angemesseneres Modell der Transportdomäne. Aus soziologischer Sicht sollen dennoch einige Defizite der Modellierung und Simulation der sozialen Praxis in Transportunternehmen benannt und die soziotechnischen Entwicklungsperspektiven der Multiagenten-Technologie in der Transportdisposition aufgezeigt werden.
description: This paper deals with the socio-technical potential of multi-agent systems to rationalize procedures of cooperative transportation planning and dispatching. Compared to conventional software systems operating with optimization procedures (e.g. operations research) multi-agent technology - as part of the research on Distributed Artificial Intelligence (DAI) - is better suited to meet real-world requirements of planning and dispatching processes in the transportation and logistic domain. From a sociological perspective, some weaknesses of simulation and social modelling approaches will be analysed and - against the background of these problems - the opportunities for multi-agent technology in the transportation domain will be discussed in this paper.
การใช้กลยุทธ์ในการฟังเพื่อสร้างเสริมทักษะการฟังภาษาอังกฤษของนักศึกษาชั้นปีที่ 1 :            กรณีศึกษามหาวิทยาลัยรังสิต
Creators: name: มงคล  โสดาจันทร์
Publisher: name: Siam Technology College,Bangkok,Thailand
Year: 2018
Subjects: ทักษะการฟังภาษาอังกฤษ, การสร้างเสริม, กลยุทธ์การฟัง: การรู้คิด ความรู้ความเข้าใจ และสังคม

description: วารสารนวัตกรรมและเทคโนโลยีการเรียนรู้วิทยาลัยเทคโนโลยีสยาม, 1, 2, 36
Social impact assessment in rural and small-town British Columbia
Creators: name: McGuigan, Erin Kathleen
Publisher: name: University of British Columbia
Year: 2015

description: Social impact assessment is the primary ex-ante tool for achieving socially sustainable outcomes and for ensuring the equitable distribution of the burdens and benefits associated with major development projects. The objectives of this research project were to evaluate the social impact assessments that are conducted as part of mandatory environmental assessments for proposed major projects in rural and small-town British Columbia (BC), Canada and to recommend practicable changes for improving social impact assessment practice and policy. I addressed these objectives by analyzing the content of social impact assessments, interviewing interested parties with technical knowledge, and conducting a multiple case study evaluation of assessments undertaken for mining projects in Northwest BC. Although my findings show that excellence is possible under the current BC Environmental Assessment Act and supporting guidelines, there is little consistency in the methods, measures, approaches, and overall quality of assessments conducted in BC. A major shortcoming that emerged was the lack of attention to issues of equity, a fundamental principle in sustainable development and social impact assessment. Further, the social impact assessments being conducted in BC are generally not supported by conceptual frameworks or grounded in theory. Ultimately, it is recommended that the provincial government provide greater guidance regarding social impact assessment and examine what appears to be an ad hoc system of professional reliance. Finally, the practice of social impact assessment would benefit from a transparent discussion regarding what constitutes a qualified social impact assessment practitioner and a more in-depth examination of the theoretical foundations of social impact assessment.
Dephasing effects on stimulated Raman adiabatic passage in tripod configurations
Creators: name: Lazarou, C.
name: Vitanov, N. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present an analytic description of the effects of dephasing processes on stimulated Raman adiabatic passage in a tripod quantum system. To this end, we develop an effective two-level model. Our analysis makes use of the adiabatic approximation in the weak dephasing regime. An effective master equation for a two-level system formed by two dark states is derived, where analytic solutions are obtained by utilizing the Demkov-Kunike model. From these, it is found that the fidelity for the final coherent superposition state decreases exponentially for increasing dephasing rates. Depending on the pulse ordering and for adiabatic evolution the pulse delay can have an inverse effect.
description: 13 pages; 9 figures; Accepted for publication Physical Review A
On Optimal Harvesting in Stochastic Environments: Optimal Policies in a Relaxed Model
Creators: name: Stockbridge, Richard H.
name: Zhu, Chao
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Biological sciences
subject: 93E20, 60J60

description: This paper examines the objective of optimally harvesting a single species in a stochastic environment. This problem has previously been analyzed in Alvarez (2000) using dynamic programming techniques and, due to the natural payoff structure of the price rate function (the price decreases as the population increases), no optimal harvesting policy exists. This paper establishes a relaxed formulation of the harvesting model in such a manner that existence of an optimal relaxed harvesting policy can not only be proven but also identified. The analysis embeds the harvesting problem in an infinite-dimensional linear program over a space of occupation measures in which the initial position enters as a parameter and then analyzes an auxiliary problem having fewer constraints. In this manner upper bounds are determined for the optimal value (with the given initial position); these bounds depend on the relation of the initial population size to a specific target size. The more interesting case occurs when the initial population exceeds this target size; a new argument is required to obtain a sharp upper bound. Though the initial population size only enters as a parameter, the value is determined in a closed-form functional expression of this parameter.
description: Key Words: Singular stochastic control, linear programming, relaxed control
On a proof of the Labastida-Marino-Ooguri-Vafa conjecture
Creators: name: Liu, Kefeng
name: Peng, Pan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Geometric Topology (math.GT)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We outline a proof of a remarkable conjecture of Labastida-Mari{ñ}o-Ooguri-Vafa about certain new algebraic structures of quantum link invariants and the integrality of infinite family of new topological invariants. Our method is based on the cut-and-join analysis and a special rational ring characterizing the structure of the Chern-Simons partition function.
The role of the gap junction protein connexin43 in glioma migration and invasion
Creators: name: Aftab, Qurratulain
Publisher: name: University of British Columbia
Year: 2015

description: Glioblastoma Multiforme (GBM), an aggressive form of adult brain tumor, is difficult to treat due to its invasive nature. A molecular change frequently observed in GBM is a decrease in the expression of the gap junction protein Connexin43 (Cx43); however, how a reduction in Cx43 expression contributes to glioma malignancy is still unclear. The first objective of this thesis was to establish an in vitro human GBM cell model to clearly delineate the role of Cx43 in the migration and invasion phenotype. Characterization of a panel of immortalized high grade human GBM cell lines showed variability in Cx43 protein expression, subcellular localization, gap junctional coupling and migration. For the second objective of my thesis I selected the human GBM cell line U118 from the aforementioned panel and developed a 3D spheroid migration model that mimics the in vivo architecture of tumor cells to quantify migration changes. Down-regulation of Cx43 expression increased migration by reducing cell-ECM adhesion. Using live imaging my findings are the first to show that glioma cells change their migration pattern from collective to single cell when Cx43 is reduced. In addition, reducing Cx43 expression enhanced relative migration by increasing the cell speed and affecting the direction of migration. Subsequently, gap junction intercellular communication (GJIC) played a more prominent role in mediating migration than the cytoplasmic interactions of the C-terminal tail. Taken together my findings reveal an unexplored role of Cx43 in facilitating collective glioma migration. The third objective of this thesis was to assess the role of homocellular and heterocellular gap junctions in glioma invasion using a syngeneic in vivo mouse model. A reduction in invasion was observed when we reduced Cx43 in mouse GL261 glioma cells and deleted it in host astrocytes. Interestingly, blocking the channel in GL261 did not decrease invasion. In summary, a reduction in homocellular gap junction communication increases migration of glioma cells in vitro however when they encounter astrocytes in the brain a lack of heterocellular gap junction communication reduced invasion. This suggests that gap junctions may have opposing roles when formed between glioma cells versus when formed between glioma and astrocytes.
On the correlation function of the characteristic polynomials of the hermitian Wigner ensemble
Creators: name: Shcherbina, Tatyana
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: Primary 15A52, Secondary 15A57

description: We consider the asymptotics of the correlation functions of the characteristic polynomials of the hermitian Wigner matrices $H_n=n^{-1/2}W_n$. We show that for the correlation function of any even order the asymptotic coincides with this for the GUE up to a factor, depending only on the forth moment of the common probability law $Q$ of entries $\Im W_{jk}$, $\Re W_{jk}$, i.e. that the higher moments of $Q$ do not contribute to the above limit.
description: 20 p
Additional file 6 of Whole-Genome Sequencing of 117 Chromosome Segment Substitution Lines for Genetic Analyses of Complex Traits in Rice
Creators: name: Fan, Jiongjiong
name: Hua, Hua
name: Luo, Zhaowei
name: Zhang, Qi
name: Chen, Mengjiao
name: Gong, Junyi
name: Wei, Xin
name: Huang, Zonghua
name: Huang, Xuehui
name: Wang, Qin
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 6. Fig. S4 Nucleotide polymorphism of the Hd3a promoter between HHZ and BAS.
E11, generalised space-time and IIA string theory
Creators: name: West, Peter
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: As advocated in hep-th/0307098 we construct the non-linear realisation of the semi-direct product of E11 and its first fundamental representation at lowest level from the IIA viewpoint. We find a theory that is SO(10,10)x GL(1) invariant and contains the fields of gravity, a two form and a dilaton but which depend on coordinates which belong to the vector representation of SO(10,10). The resulting Lagrangian agrees that of recent work on the so called doubled field theory. However, the construction given in this paper is straightforward and systematic. It also reveals the relevant underlying symmetries and opens the way to include the Ramond-Ramond, and higher level, fields together with additional coordinates of the generalised space-time.
description: 15 pages
Additional file 1 of Whole-Genome Sequencing of 117 Chromosome Segment Substitution Lines for Genetic Analyses of Complex Traits in Rice
Creators: name: Fan, Jiongjiong
name: Hua, Hua
name: Luo, Zhaowei
name: Zhang, Qi
name: Chen, Mengjiao
name: Gong, Junyi
name: Wei, Xin
name: Huang, Zonghua
name: Huang, Xuehui
name: Wang, Qin
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Fig. S1 Location of 396 InDel marker primers on chromosomes; the black bar represents a marker.
Annihilation emission from young supernova remnants
Creators: name: Martin, Pierrick
name: Vink, Jacco
name: Jiraskova, Sarka
name: Jean, Pierre
name: Diehl, Roland
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A promising source of the positrons that contribute through annihilation to the diffuse Galactic 511keV emission is the beta-decay of unstable nuclei like 56Ni and 44Ti synthesised by massive stars and supernovae. Although a large fraction of these positrons annihilate in the ejecta of SNe/SNRs, no point-source of annihilation radiation appears in the INTEGRAL/SPI map of the 511keV emission. We exploit the absence of detectable annihilation emission from young local SNe/SNRs to derive constraints on the transport of MeV positrons inside SN/SNR ejecta and their escape into the CSM/ISM, both aspects being crucial to the understanding of the observed Galactic 511keV emission. We simulated 511keV lightcurves resulting from the annihilation of the decay positrons of 56Ni and 44Ti in SNe/SNRs and their surroundings using a simple model. We computed specific 511keV lightcurves for Cas A, Tycho, Kepler, SN1006, G1.9+0.3 and SN1987A, and compared these to the upper-limits derived from INTEGRAL/SPI observations. The predicted 511keV signals from positrons annihilating in the ejecta are below the sensitivity of the SPI instrument by several orders of magnitude, but the predicted 511keV signals for positrons escaping the ejecta and annihilating in the surrounding medium allowed to derive upper-limits on the positron escape fraction of ~13% for Cas A, ~12% for Tycho, ~30% for Kepler and ~33% for SN1006. The transport of ~MeV positrons inside SNe/SNRs cannot be constrained from current observations of the 511keV emission from these objects, but the limits obtained on their escape fraction are consistent with a nucleosynthesis origin of the positrons that give rise to the diffuse Galactic 511keV emission.
description: 15 pages, 11 figures, accepted for publication in A&A
Effect of Exchange-type Zero-bias Anomaly on Single Electron Tunnelling of Au Nanoparticles
Creators: name: Xu, Rui
name: Sun, Yi
name: Yan, Hui
name: Yang, Ji-Yong
name: He, Lin
name: Nie, Jia-Cai
name: Li, Yadong
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: Using cryogenic scanning tunnelling microscopy and scanning tunnelling spectroscopy we measured single electron tunnelling of isolated Au nanoparticles with 1.4 nm in radius. We observe that a gap ΔV ~ 2e/C (C is the capacitance of the Au particle) around zero bias in the tunnelling conductance spectrum, followed by a series of discrete single electron tunnelling peaks with voltage widths of EC ~ e/C at both negative and positive bias. Experimental data are well explained by taking into account the effect of exchange interaction of electrons on the single electron tunnelling of Au nanoparticles. A tunnelling peak near zero-bias was suppressed by the exchange-type zero-bias anomaly, which results in the gap ΔV ~ 2EC.
description: 4pages, 3 figures
Constraining the coalescence rate of supermassive black-hole binaries using pulsar timing
Creators: name: Wen, Z. L.
name: Jenet, F. A.
name: Yardley, D.
name: Hobbs, G. B.
name: Manchester, R. N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Pulsar timing observations are used to place constraints on the rate of coalescence of supermassive black-hole (SMBH) binaries as a function of mass and redshift. In contrast to the indirect constraints obtained from other techniques, pulsar timing observations provide a direct constraint on the black-hole merger rate. This is possible since pulsar timing is sensitive to the gravitational waves (GWs) emitted by these sources in the final stages of their evolution. We find that upper bounds calculated from the recently published Parkes Pulsar Timing Array data are just above theoretical predictions for redshifts below 10. In the future, with improved timing precision and longer data spans, we show that a non-detection of GWs will rule out some of the available parameter space in a particular class of SMBH binary merger models. We also show that if we can time a set of pulsars to 10ns timing accuracy, for example, using the proposed Square Kilometre Array, it should be possible to detect one or more individual SMBH binary systems.
SWARM: Replicating Shared Disaggregated-Memory Data in No Time
Creators: name: Murat, Antoine
name: Burgelin, Clément
name: Xygkis, Athanasios
name: Zablotchi, Igor
name: Aguilera, Marcos K.
name: Guerraoui, Rachid
Publisher: name: arXiv
Year: 2024
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Memory disaggregation is an emerging data center architecture that improves resource utilization and scalability. Replication is key to ensure the fault tolerance of applications, but replicating shared data in disaggregated memory is hard. We propose SWARM (Swift WAit-free Replication in disaggregated Memory), the first replication scheme for in-disaggregated-memory shared objects to provide (1) single-roundtrip reads and writes in the common case, (2) strong consistency (linearizability), and (3) strong liveness (wait-freedom). SWARM makes two independent contributions. The first is Safe-Guess, a novel wait-free replication protocol with single-roundtrip operations. The second is In-n-Out, a novel technique to provide conditional atomic update and atomic retrieval of large buffers in disaggregated memory in one roundtrip. Using SWARM, we build SWARM-KV, a low-latency, strongly consistent and highly available disaggregated key-value store. We evaluate SWARM-KV and find that it has marginal latency overhead compared to an unreplicated key-value store, and that it offers much lower latency and better availability than FUSEE, a state-of-the-art replicated disaggregated key-value store.
description: To appear in the proceedings of SOSP '24
Bulk Axions, Brane Back-reaction and Fluxes
Creators: name: Burgess, C. P.
name: van Nierop, L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Extra-dimensional models can involve bulk pseudo-Goldstone bosons (pGBs) whose shift symmetry is explicitly broken only by physics localized on branes. Reliable calculation of their low-energy potential is often difficult because it requires details of the stabilization of the extra dimensions. In rugby ball solutions, for which two compact extra dimensions are stabilized in the presence of only positive-tension brane sources, the effects of brane back-reaction can be computed explicitly. This allows the calculation of the shape of the low-energy pGB potential and response of the extra dimensional geometry as a function of the perturbing brane properties. If the pGB-dependence is a small part of the total brane tension a very general analysis is possible, permitting an exploration of how the system responds to frustration when the two branes disagree on what the proper scalar vacuum should be. We show how the low-energy potential is given by the sum of brane tensions (in agreement with common lore) when only the brane tensions couple to the pGB. We also show how a direct brane coupling to the flux stabilizing the extra dimensions corrects this result in a way that does not simply amount to the contribution of the flux to the brane tensions. We calculate the mass of the would-be zero mode, and briefly describe several potential applications, including a brane realization of `natural inflation,' and a dynamical mechanism for suppressing the couplings of the pGB to matter localized on the branes. Since the scalar can be light enough to be relevant to precision tests of gravity (in a technically natural way) this mechanism can be relevant to evading phenomenological bounds.
description: 36 pages, JHEP style
Additional file 5 of Whole-Genome Sequencing of 117 Chromosome Segment Substitution Lines for Genetic Analyses of Complex Traits in Rice
Creators: name: Fan, Jiongjiong
name: Hua, Hua
name: Luo, Zhaowei
name: Zhang, Qi
name: Chen, Mengjiao
name: Gong, Junyi
name: Wei, Xin
name: Huang, Zonghua
name: Huang, Xuehui
name: Wang, Qin
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 5. Fig. S3 Mapping of heading date in the BC3F1 population by WinQTLCart.
On Computational Power of Quantum Read-Once Branching Programs
Creators: name: Ablayev, Farid
name: Vasiliev, Alexander
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: In this paper we review our current results concerning the computational power of quantum read-once branching programs. First of all, based on the circuit presentation of quantum branching programs and our variant of quantum fingerprinting technique, we show that any Boolean function with linear polynomial presentation can be computed by a quantum read-once branching program using a relatively small (usually logarithmic in the size of input) number of qubits. Then we show that the described class of Boolean functions is closed under the polynomial projections.
description: In Proceedings HPC 2010, arXiv:1103.2268
Abundance analysis of DAZ white dwarfs
Creators: name: Kawka, Adela
name: Vennes, Stephane
name: Dinnbier, Frantisek
name: Cibulkova, Helena
name: Nemeth, Peter
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present an abundance analysis of a sample of 33 hydrogen-rich (DA) white dwarfs. We have used archival high-resolution spectra to measure abundances of calcium, magnesium and iron in a set of 30 objects. In addition, we present preliminary calcium abundances in three new white dwarfs based on low-dispersion spectra. We investigate some abundance ratios (Mg/Ca, Fe/Ca) that may help uncover the composition of the accretion source.
description: Part of PlanetsbeyondMS/2010 proceedings http://arxiv.org/html/1011.6606
Public Opinion Survey 96121-78
Creators: name: Institute Of Communication And Research
Publisher: name: Roper Center for Public Opinion Research
Year: 2024

description: Greece's best ally (1); Cold War (1); Russia (1); household purchases (1); international problems (2); career better/worse this year (1); new political party (2); church attendance (1); Prime Minister Papandreou job performance (2); reading newspaper (3); National Radical Union (1); listening to radio (3); food, meals (2); hair care (3); toothpaste (1); owning various items (1); Papandreou's trip to Moscow (1).
Galactic center at very high-energies
Creators: name: Chernyakova, M.
name: Malyshev, D.
name: Aharonian, F. A.
name: Crocker, R. M.
name: Jones, D. I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Employing data collected during the first 25 months' observations by the Fermi-LAT, we describe and subsequently seek to model the very high energy (>300 MeV) emission from the central few parsecs of our Galaxy. We analyze the morphological, spectral and temporal characteristics of the central source, 1FGL J1745.6-2900. Remarkably, the data show a clear, statistically significant signal at energies above 10 GeV, where the Fermi-LAT has an excellent angular resolution comparable to the angular resolution of HESS at TeV energies, which makes meaningful the joint analysis of the Fermi and HESS data. Our analysis does not show statistically significant variability of 1FGL J1745.6-2900. Using the combination of Fermi data on 1FGL J1745.6-2900 and HESS data on the coincident, TeV source HESS J1745-290, we show that the spectrum of the central gamma-ray source is inflected with a relatively steep spectral region matching between the flatter spectrum found at both low and high energies. We seek to model the gamma-ray production in the inner 10 pc of the Galaxy and examine, in particular, cosmic ray (CR) proton propagation scenarios that reproduce the observed spectrum of the central source. We show that a model that instantiates a transition from diffusive propagation of the CR protons at low energy to almost rectilinear propagation at high energies (given a reasonable energy-dependence of the assumed diffusion coefficient) can well explain the spectral phenomenology. In general, however, we find considerable degeneracy between different parameter choices which will only be broken with the addition of morphological information that gamma-ray telescopes cannot deliver given current angular resolution limits.We argue that a future analysis done in combination with higher-resolution radio continuum data holds out the promise of breaking this degeneracy.
description: submitted to ApJ
Fe XVII X-ray Line Ratios for Accurate Astrophysical Plasma Diagnostics
Creators: name: Gillaspy, J. D.
name: Lin, T.
name: Tedesco, L.
name: Tan, J. N.
name: Pomeroy, J. M.
name: Laming, J. M.
name: Brickhouse, N.
name: Chen, G. -X.
name: Silver, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Atomic Physics (physics.atom-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: New laboratory measurements using an Electron Beam Ion Trap (EBIT) and an x-ray microcalorimeter are presented for the n=3 to n=2 Fe XVII emission lines in the 15 Å to 17 Å range, along with new theoretical predictions for a variety of electron energy distributions. This work improves upon our earlier work on these lines by providing measurements at more electron impact energies (seven values from 846 to 1185 eV), performing an in situ determination of the x-ray window transmission, taking steps to minimize the ion impurity concentrations, correcting the electron energies for space charge shifts, and estimating the residual electron energy uncertainties. The results for the 3C/3D and 3s/3C line ratios are generally in agreement with the closest theory to within 10%, and in agreement with previous measurements from an independent group to within 20%. Better consistency between the two experimental groups is obtained at the lowest electron energies by using theory to interpolate, taking into account the significantly different electron energy distributions. Evidence for resonance collision effects in the spectra is discussed. Renormalized values for the absolute cross sections of the 3C and 3D lines are obtained by combining previously published results, and shown to be in agreement with the predictions of converged R-matrix theory. This work establishes consistency between results from independent laboratories and improves the reliability of these lines for astrophysical diagnostics. Factors that should be taken into account for accurate diagnostics are discussed, including electron energy distribution, polarization, absorption/scattering, and line blends.
description: 29 pages, including 7 figures
Photon generation in an electromagnetic cavity with a time-dependent boundary
Creators: name: Wilson, C. M.
name: Duty, T.
name: Sandberg, M.
name: Persson, F.
name: Shumeiko, V.
name: Delsing, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the observation of photon generation in a microwave cavity with a time-dependent boundary condition. Our system is a microfabricated quarter-wave coplanar waveguide cavity. The electrical length of the cavity is varied using the tunable inductance of a superconducting quantum interference device. It is measured in the quantum regime, where the temperature is significantly less than the resonance frequency (~ 5 GHz). When the length is modulated at approximately twice the static resonance frequency, spontaneous oscillations of the cavity field are observed. Time-resolved measurements of the dynamical state of the cavity show multiple stable states. The behavior is well described by theory. Connections to the dynamical Casimir effect are discussed.
description: 5 pages, 3 Figures
Three qubit entanglement within graphical Z/X-calculus
Creators: name: Coecke, Bob
name: Edwards, Bill
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The compositional techniques of categorical quantum mechanics are applied to analyse 3-qubit quantum entanglement. In particular the graphical calculus of complementary observables and corresponding phases due to Duncan and one of the authors is used to construct representative members of the two genuinely tripartite SLOCC classes of 3-qubit entangled states, GHZ and W. This nicely illustrates the respectively pairwise and global tripartite entanglement found in the W- and GHZ-class states. A new concept of supplementarity allows us to characterise inhabitants of the W class within the abstract diagrammatic calculus; these method extends to more general multipartite qubit states.
description: In Proceedings HPC 2010, arXiv:1103.2268
Liger at W.M. Keck Observatory: imager structural analysis, fabrication, and characterization plan
Creators: name: Wiley, James
name: Brown, Aaron
name: Kupke, Renate
name: Cosens, Maren
name: Wright, Shelley A.
name: Maire, Jerome
name: Magnone, Kenneth
name: Kress, Evan
name: Wang, Eric
name: Johnson, Chris
name: Larkin, James E.
name: Fitzgerald, Michael P.
name: Kassis, Marc
name: Jones, Tucker
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Liger is an adaptive optics (AO) fed imager and integral field spectrograph (IFS) designed to take advantage of the Keck All-sky Precision Adaptive-optics (KAPA) upgrade to the Keck I telescope. Liger adapts the design of the InfraRed Imaging Spectrograph (IRIS) for the Thirty Meter Telescope (TMT) to Keck by implementing a new imager and re-imaging optics. The performance of the imager is critical as it sequentially feeds the spectrograph and contains essential components such as the pupil wheel, filter wheel, and pupil viewing camera. We present the design and structural analysis of the Liger imager optical assembly including static, modal, and thermal simulations. We present the fabrication as well as the full assembly and characterization plan. The imager will be assembled bench-top in a clean room utilizing a coordinate-measuring machine (CMM) for warm alignment. To ensure optimal performance, the imager will be characterized in a test cryostat before integration with the full Liger instrument. This comprehensive approach to characterization ensures the precision and reliability of the imager, enhancing the observational capabilities of Liger and W.M. Keck Observatory.
Google matrix of business process management
Creators: name: Abel, M.
name: Shepelyansky, D. L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computers and Society (cs.CY)
subject: Information Retrieval (cs.IR)
subject: Physics and Society (physics.soc-ph)
subject: General Finance (q-fin.GN)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: Development of efficient business process models and determination of their characteristic properties are subject of intense interdisciplinary research. Here, we consider a business process model as a directed graph. Its nodes correspond to the units identified by the modeler and the link direction indicates the causal dependencies between units. It is of primary interest to obtain the stationary flow on such a directed graph, which corresponds to the steady-state of a firm during the business process. Following the ideas developed recently for the World Wide Web, we construct the Google matrix for our business process model and analyze its spectral properties. The importance of nodes is characterized by Page-Rank and recently proposed CheiRank and 2DRank, respectively. The results show that this two-dimensional ranking gives a significant information about the influence and communication properties of business model units. We argue that the Google matrix method, described here, provides a new efficient tool helping companies to make their decisions on how to evolve in the exceedingly dynamic global market.
description: submitted to European Journal of Physics B
Accretion and diffusion in the DAZ white dwarf GALEX J1931+0117
Creators: name: Vennes, Stephane
name: Kawka, Adela
name: Nemeth, Peter
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present an analysis of high-dispersion and high signal-to-noise ratio spectra of the DAZ white dwarf GALEX J1931+0117. The spectra obtained with the VLT-Kueyen/UV-Visual Echelle Spectrograph show several well-resolved Si II spectral lines enabling a study of pressure effects on line profiles. We observed large Stark shifts in silicon lines in agreement with laboratory measurements. A model atmosphere analysis shows that the magnesium, silicon and iron abundances exceed solar abundances, while the oxygen and calcium abundances are below solar. Also, we compared the observed line profiles to synthetic spectra computed with variable accretion rates and vertical abundance distributions assuming diffusion steady-state. The inferred accretion rates vary from dM/dt=2x10^6 for calcium to 2x10^9 g/s for oxygen and indicate that the accretion flow is dominated by oxygen, silicon and iron while being deficient in carbon, magnesium and calcium. The lack of radial velocity variations between two measurement epochs suggests that GALEX J1931+0117 is probably not in a close binary and that the source of the accreted material resides in a debris disc.
description: Part of PlanetsbeyondMS/2010 proceedings http://arxiv.org/html/1011.6606
Biomass for bioenergy and/or transportation biofuels : exploration of key drivers influencing biomass allocation
Creators: name: Cadham, William James
Publisher: name: University of British Columbia
Year: 2015

description: Biomass is the world’s largest source of renewable energy and it is likely to remain so until at least 2035 (IEA, 2013a). Globally, there should be enough biomass available to meet growing demand. However, biomass is predisposed to being used locally possibly resulting in limited domestic supply in countries where biomass is already used extensively (IEA, 2009). This could potentially result in competition between bioenergy or biofuels applications. The work described here explored the current and potential bioenergy/biofuel uses of biomass both globally as well as regionally, with a focus on Brazil, Denmark, Sweden and the United States. In each of these countries, biofuels or bioenergy are already important parts of their energy mix. For all of the countries studied the major drivers to use biomass for energy/fuels were: energy security; the desire to mitigate climate change; prevailing regional economic interests, and; the potential that bioenergy/biofuels are cheaper than fossil derived alternatives. Government support policies for bioenergy and biofuels are examined within the context of each of the four drivers. It was apparent that there is limited competition for biomass between bioenergy and transportation biofuel applications. This situation is likely to continue until advanced biofuels technologies become much more commercially established. In each of the four countries biomass is predominantly used to produce bioenergy (heat and power), even in those regions where biofuels are significant component of their transportation sector (United States, Brazil and Sweden). The vast majority of biofuel production continues to be based on conventional sugar, starch and oil rich feedstocks, while bioenergy (heat, power, residential, industrial) is produced almost exclusively from forest biomass with agricultural biomass playing a small, but increasing, secondary role. As current and proposed commercial scale biomass-to-ethanol facilities almost exclusively use agriculture derived residues (corn stover, wheat straw, sugar cane bagasse), it is likely that, if there is ever to be competition for biomass feedstock’s for bioenergy/biofuel applications, it will be for agricultural based biomass with co-product lignin and other residues used to concomitantly produce heat-and-electricity on site at biofuel production facilities.
The GHZ/W-calculus contains rational arithmetic
Creators: name: Coecke, Bob
name: Kissinger, Aleks
name: Merry, Alex
name: Roy, Shibdas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Graphical calculi for representing interacting quantum systems serve a number of purposes: compositionally, intuitive graphical reasoning, and a logical underpinning for automation. The power of these calculi stems from the fact that they embody generalized symmetries of the structure of quantum operations, which, for example, stretch well beyond the Choi-Jamiolkowski isomorphism. One such calculus takes the GHZ and W states as its basic generators. Here we show that this language allows one to encode standard rational calculus, with the GHZ state as multiplication, the W state as addition, the Pauli X gate as multiplicative inversion, and the Pauli Z gate as additive inversion.
description: In Proceedings HPC 2010, arXiv:1103.2268
Renormalization of One Meson Exchange Potentials and Their Currents
Creators: name: Cordon, A. Calle
name: Arriola, E. Ruiz
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Nucleon-Nucleon One Meson Exchange Potential, its wave functions and related Meson Exchange Currents are analyzed for point-like nucleons. The leading Nc contributions generate a local and energy independent potential which presents 1/r^3 singularities, requiring renormalization. We show how invoking suitable boundary conditions, neutron-proton phase shifts and deuteron properties become largely insensitive to the nucleon substructure and to the vector mesons. Actually, reasonable agreement with low energy data for realistic values of the coupling constants (e.g. SU(3) values) is found. The analysis along similar lines for the Meson Exchange Currents suggests that this renormalization scheme implies tremendous simplifications while complying with exact gauge invariance at any stage of the calculation.
description: Talk given at 12th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2010), Williamsburg, Virginia, 31 May - 4 Jun 2010
Lattice studies of hadron physics with disconnected quark loops
Creators: name: Kaneko, Takashi
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Disconnected diagrams give crucial contributions to the physics of flavor singlet hadrons and to scalar form factors of non-singlet hadrons. Naive lattice calculation of the disconnected diagrams, however, requires a huge number of fermion matrix inversions and hence a prohibitively large computational cost. In this article, we present recent studies of the flavor-singelt meson spectrum and nucleon strange quark content using the all-to-all propagator to calculate the relevant disconnected diagrams.
description: 4pages, talk presented at 35th International Conference of High Energy Physics (ICHEP 2010), July 22-28, 2010, Paris, France
Growth of epitaxially oriented Ag nanoislands on air-oxidized Si(111)-(7x7) surfaces: Influence of short range order on the substrate
Creators: name: Roy, Anupam
name: Bhattacharjee, K.
name: Ghatak, J.
name: Dev, B. N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Clean Si(111)-(7{x7) surfaces, followed by air-exposure, have been investigated by reflection high energy electron diffraction (RHEED) and scanning tunneling microscopy (STM). Fourier transforms (FTs) of STM images show the presence of short range (7x7) order on the air-oxidized surface. Comparison with FTs of STM images from a clean Si(111)-(7x7) surface shows that only the 1/7th order spots are present on the air-oxidized surface. The oxide layer is ~ 2-3 nm thick, as revealed by cross-sectional transmission electron microscopy (XTEM). Growth of Ag islands on these air-oxidized Si(111)-(7x7) surfaces has been investigated by in-situ RHEED and STM and ex-situ XTEM and scanning electron microscopy. Ag deposition at room temperature leads to the growth of randomly oriented Ag islands while preferred orientation evolves when Ag is deposited at higher substrate temperatures. For deposition at 550°C face centered cubic Ag nanoislands grow with a predominant epitaxial orientation [1 -1 0]Ag || [1 -1 0]Si, (111)Ag || (111)Si along with its twin [-1 1 0]Ag || [1 -1 0]Si, (111)Ag || (111)Si, as observed for epitaxial growth of Ag on Si(111) surfaces. The twins are thus rotated by a 180° rotation of the Ag unit cell about the Si [111] axis. It is intriguing that Ag nanoislands follow an epitaxial relationship with the Si(111) substrate in spite of the presence of a 2-3 nm thick oxide layer between Ag and Si. Apparently the short range order on the oxide surface influences the crystallographic orientation of the Ag nanoislands.
description: 10 figures
Experimental realization of field-induced XY and Ising ground states in a quasi-2D S=1/2 Heisenberg antiferromagnet
Creators: name: Jaime, Yoshimitsu Kohama. Marcelo
name: Ayala-Valenzuela, Oscar E.
name: McDonald, Ross D.
name: Mun, Eun deok
name: Corbey, Jordan F.
name: Manson, Jamie L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: High field specific heat, Cp, and magnetic susceptibility, \c{hi}, measurements were performed on the quasi-two dimensional Heisenberg antiferromagnet [Cu(pyz)2(pyO)2](PF6)2. While no Cp anomaly is observed down to 0.5 K in zero magnetic field, the application of field parallel to the crystallographic ab-plane induces a lambda-like anomaly in Cp, consistent with Ising-type magnetic order. On the other hand, when the field is parallel to the c-axis, Cp and \c{hi} show evidence of XY-type antiferromagnetism. We argue that it is a small but finite easy-plane anisotropy in quasi-two dimensional [Cu(pyz)2(pyO)2](PF6)2 that allows the unusual observation of field induced XY and Ising-type magnetic states.
description: 4 figures
Pulse-to-pulse Beam Modulation and Event-based Beam Feedback System at KEKB Linac
Creators: name: Furukawa, Kazuro
name: Satoh, Masanori
name: Suwada, Tsuyoshi
name: Nakamura, Tatsuro
Publisher: name: arXiv
Year: 2010
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Beam injections to KEKB and Photon Factory are performed with pulse-to-pulse modulation at 50 Hz. Three very different beams are switched every 20 ms in order to inject those beams into KEKB HER, LER and Photon Factory (PF) simultaneously. Human operators work on one of those three virtual accelerators, which correspond to three-fold accelerator parameters. Beam charges for PF injection and the primary electron for positron generation are 50-times different, and beam energies for PF and HER injection are 3-times different. Thus, the beam stabilities are sensitive to operational parameters, and if any instability in accelerator equipment occurred, beam parameter adjustments for those virtual accelerators have to be performed. In order to cure such a situation, beam energy feedback system was installed that can respond to each of virtual accelerators independently.
description: 3 pages, 2 figures, Contributed Talk at IPAC10, Kyoto, id:TUOCMH01
Additional file 3: of Mutation allele frequency threshold does not affect prognostic analysis using next-generation sequencing in oral squamous cell carcinoma
Creators: name: Ma, Jie
name: Fu, Yong
name: Tu, Yao-yao
name: Liu, Ying
name: Tan, Yi-ran
name: Ju, Wu-tong
name: Pickering, Curtis
name: Myers, Jeffrey
name: Zhang, Zhi-yuan
name: Zhong, Lai-ping
Publisher: name: figshare
Year: 2018
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology
subject: Computational Biology

description: Table S3. Non-synonymous mutations (threshold of allele frequency of â Ľ3%) in the cancerous tissues from oral squamous cell carcinoma patients. (DOCX 24Â kb)