cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Generalized SURE for Exponential Families: Applications to Regularization
Creators: name: Eldar, Yonina C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Methodology (stat.ME)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Stein's unbiased risk estimate (SURE) was proposed by Stein for the independent, identically distributed (iid) Gaussian model in order to derive estimates that dominate least-squares (LS). In recent years, the SURE criterion has been employed in a variety of denoising problems for choosing regularization parameters that minimize an estimate of the mean-squared error (MSE). However, its use has been limited to the iid case which precludes many important applications. In this paper we begin by deriving a SURE counterpart for general, not necessarily iid distributions from the exponential family. This enables extending the SURE design technique to a much broader class of problems. Based on this generalization we suggest a new method for choosing regularization parameters in penalized LS estimators. We then demonstrate its superior performance over the conventional generalized cross validation approach and the discrepancy method in the context of image deblurring and deconvolution. The SURE technique can also be used to design estimates without predefining their structure. However, allowing for too many free parameters impairs the performance of the resulting estimates. To address this inherent tradeoff we propose a regularized SURE objective. Based on this design criterion, we derive a wavelet denoising strategy that is similar in sprit to the standard soft-threshold approach but can lead to improved MSE performance.
description: to appear in the IEEE Transactions on Signal Processing
Radio Afterglows from Compact Binary Coalescences: Prospects for Next-Generation Telescopes
Creators: name: Dobie, Dougal
name: Murphy, Tara
name: Kaplan, David L.
name: Hotokezaka, Kenta
name: Ataides, Juan Pablo Bonilla
name: Mahony, Elizabeth K.
name: Sadler, Elaine M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The detection of gravitational waves from a neutron star merger, GW170817, marked the dawn of a new era in time-domain astronomy. Monitoring of the radio emission produced by the merger, including high-resolution radio imaging, enabled measurements of merger properties including the energetics and inclination angle. In this work we compare the capabilities of current and future gravitational wave facilities to the sensitivity of radio facilities to quantify the prospects for detecting the radio afterglows of gravitational wave events. We consider three observing strategies to identify future mergers -- widefield follow-up, targeting galaxies within the merger localisation and deep monitoring of known counterparts. We find that while planned radio facilities like the Square Kilometre Array will be capable of detecting mergers at gigaparsec distances, no facilities are sufficiently sensitive to detect mergers at the range of proposed third-generation gravitational wave detectors that would operate starting in the 2030s.
Transformation of set schema into relational structures
Creators: name: Lee, Anna
Publisher: name: University of British Columbia
Year: 2010

description: This thesis describes a new approach of relational database design using the SET conceptual model. The SET conceptual model is used for information modelling. The database schema generated from the information modelling is called the SET schema. The SET schema consists of the declarations of all the sets of the database schema. A domain graph can be constructed based on the information declared in the SET schema. A domain graph is a directed graph with nodes labelled with declared sets and arcs labelled with degree information. Each are in the domain graph points to a node S from a node labelled with an immediate domain predecessor of S. The new method of table design for the relational database involves partitioning the domain graph into mutually exclusive <1,1>-connected components based on the degree information. These components (subgraphs) are then transformed into tree structures. These trees are extended to include the domain predecessors of their nodes to make them predecessor total. The projections of these extended trees into the value sets labelling their leaf nodes form a set of relations which can be represented by tables. This table design method is described and presented in this thesis, along with d program that automates the method. Given a schema of the SET model, together with some degree information about defined sets that a user must calculate based on the intention of the defined sets, the program produces a relational database schema that will record data for the SET schema correctly and completely.
การพัฒนารูปแบบการบริหารการประกันคุณภาพภายในสถานศึกษาขั้นพื้นฐาน สังกัดสำนักงานศึกษาธิการภาค 13
Creators: name: สุกันยามาศ มาประจง
Publisher: name: หจก.เลิศศิลป์ สาส์ณ โฮลดิ้ง
Year: 2564
Subjects: การพัฒนารูปแบบ
รูปแบบการบริหารการประกันคุณภาพภายใน
การประกันคุณภาพภายใน
สถานศึกษาขั้นพื้นฐาน

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 15, 1, 250-263
The clustering of Ly-alpha emitters in a LambdaCDM Universe
Creators: name: Orsi, A.
name: Lacey, C. G.
name: Baugh, C. M.
name: Infante, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We combine a semi-analytical model of galaxy formation with a very large simulation which follows the growth of large scale structure in a LambdaCDM universe to predict the clustering of Ly-alpha emitters. We find that the clustering strength of Ly-alpha emitters has only a weak dependence on Ly-alpha luminosity but a strong dependence on redshift. With increasing redshift, Ly-alpha emitters trace progressively rarer, higher density regions of the universe. Due to the large volume of the simulation, over 100 times bigger than any previously used for this application, we can construct mock catalogues of Ly-alpha emitters and study the sample variance of current and forthcoming surveys. We find that the number and clustering of Ly-alpha emitters in our mock catalogues are in agreement with measurements from current surveys, but that there is a considerable scatter in these quantities. We argue that a proposed survey of emitters at z=8.8 should be extended significantly in solid angle to allow a robust measurement of Ly-alpha emitter clustering.
description: 17 pages, 18 figures. Accepted for publication in MNRAS. Minor revisions following referee's report. Replaced with version including Addendum to published paper discussing integral constraint correction. For high resolution figures see http://astro.dur.ac.uk/~aaorsi/publications/clustering_laes
Interpretation of LHC excesses in ditop and ditau channels as a 400-GeV pseudoscalar resonance
Creators: name: Arganda, Ernesto
name: Da Rold, Leandro
name: Díaz, Daniel A.
name: Medina, Anibal D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Since the discovery in 2012 of the Higgs boson at the LHC, as the last missing piece of the Standard Model of particle physics, any hint of new physics has been intensively searched for, with no confirmation to date. There are however slight deviations from the SM that are worth investigating. The CMS collaboration has reported, in a search for heavy resonances decaying in $t \bar t$ with a 13-TeV center-of-mass energy and a luminosity of 35.9 fb$^{-1}$, deviations from the SM predictions at the 3.5$σ$ level locally (1.9$σ$ after the look-elsewhere effect). In addition, in the ditau final state search performed by the ATLAS collaboration at $\sqrt{s}=13$ TeV and $\mathcal{L}=139$ fb$^{-1}$, deviations from the SM at the 2$σ$ level have been also observed. Interestingly, both slight excesses are compatible with a new pseudoscalar boson with a mass around 400 GeV that couples at least to fermions of the third generation and gluons. Starting from a purely phenomenological perspective, we inspect the possibility that a 400-GeV pseudoscalar can account for these deviations and at the same time satisfy the constraints on the rest of the channels that it gives contributions to and that are analyzed by the ATLAS and CMS experiments. After obtaining the range of effective couplings compatible with all experimental measurements, we study the gauge invariant UV completions that can give rise to this type of pseudoscalar resonance, which can be accommodated in an $SO(6)/SO(5)$ model with consistency at the 1$σ$ level and in a $SO(5)\times U(1)_{P}\times U(1)_{X}/SO(4)\times U(1)_X$ at the 2$σ$ level, while exceedingly large quartic couplings would be necessary to account for it in a general two Higgs doublet model.
description: 24 pages, 3 figures, 2 tables; matches version published in JHEP
Two-particle scattering on the lattice: Phase shifts, spin-orbit coupling, and mixing angles
Creators: name: Borasoy, Bugra
name: Epelbaum, Evgeny
name: Krebs, Hermann
name: Lee, Dean
name: Meißner, Ulf-G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We determine two-particle scattering phase shifts and mixing angles for quantum theories defined with lattice regularization. The method is suitable for any nonrelativistic effective theory of point particles on the lattice. In the center-of-mass frame of the two-particle system we impose a hard spherical wall at some fixed large radius. For channels without partial-wave mixing the partial-wave phase shifts are determined from the energies of the nearly-spherical standing waves. For channels with partial-wave mixing further information is extracted by decomposing the standing wave at the wall boundary into spherical harmonics, and we solve coupled-channels equations to extract the phase shifts and mixing angles. The method is illustrated and tested by computing phase shifts and mixing angles on the lattice for spin-1/2 particles with an attractive Gaussian potential containing both central and tensor force parts.
description: 28 pages, 11 figures, journal version
Black holes in the quadratic-order extended vector-tensor theories
Creators: name: Minamitsuji, Masato
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the static and spherically black hole solutions in the quadratic-order extended vector-tensor theories without suffering from the Ostrogradsky instabilities, which include the quartic-order (beyond-)generalized Proca theories as the subclass. We start from the most general action of the vector-tensor theories constructed with up to the quadratic-order terms of the first-order covariant derivatives of the vector field, and derive the Euler-Lagrange equations for the metric and vector field variables in the static and spherically symmetric backgrounds. We then substitute the spacetime metric functions of the Schwarzschild, Schwarzschild-de Sitter/ anti-de Sitter, Reissner-Nordström-type, and Reissner-Nordström-de Sitter/ anti-de Sitter-type solutions and the vector field with the constant spacetime norm into the Euler-Lagrange equations, and obtain the conditions for the existence of these black hole solutions. These solutions are classified into the two cases 1) the solutions with the vanishing vector field strength; the stealth Schwarzschild and the Schwarzschild de Sitter/ anti- de Sitter solutions, and 2) those with the nonvanishing vector field strength; the charged stealth Schwarzschild and the charged Schwarzschild de Sitter/ anti- de Sitter solutions, in the case that the tuning relation among the coupling functions is satisfied. In the latter case, if this tuning relation is violated, the solution becomes the Reissner-Nordström-type solution. We show that the conditions for the existence of these solutions are compatible with the degeneracy conditions for the Class-A theories, and recover the black hole solutions in the generalized Proca theories as the particular cases.
description: 15 pages
เครือข่ายการสื่อสารของนักพนันหวยใต้ดินชนชั้นกลาง
Creators: name: วชิรารัตน์ นิรันดร์เตชาภัทร์
Publisher: name: หจก.เลิศศิลป์ สาส์ณ โฮลดิ้ง
Year: 2564
Subjects: เครือข่ายการสื่อสาร
นักพนันหวยใต้ดิน
ชนชั้นกลาง

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 15, 1, 264-277
Absolute properties of the binary system BB Pegasi
Creators: name: Kalomeni, B.
name: Yakut, K.
name: Keskin, V.
name: Degirmenci, O. L.
name: Ulas, B.
name: Kose, O.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a ground based photometry of the low-temperature contact binary BB Peg. We collected all times of mid-eclipses available in literature and combined them with those obtained in this study. Analyses of the data indicate a period increase of 3.0(1) x 10^{-8} days/yr. This period increase of BB Peg can be interpreted in terms of the mass transfer 2.4 x 10^{-8} Ms yr^{-1} from the less massive to the more massive component. The physical parameters have been determined as Mc = 1.42 Ms, Mh = 0.53 Ms, Rc = 1.29 Rs, Rh = 0.83 Rs, Lc = 1.86 Ls, and Lh = 0.94 Ls through simultaneous solution of light and of the radial velocity curves. The orbital parameters of the third body, that orbits the contact system in an eccentric orbit, were obtained from the period variation analysis. The system is compared to the similar binaries in the Hertzsprung-Russell and Mass-Radius diagram.
description: 17 pages, 3 figures, accepted for Astronomical Journal
title: Implementierung und Evaluation einer virtuellen FPGA-Architektur
Creators: name: Bergmann, Clemens
Publisher: name: UNSPECIFIED
Year: 2021

description: FPGAs werden in der Industrie zu vielen Zwecken verwendet. Ein großer Anwendungsfall ist der Bereich des rapid prototyping. Außerdem werden sie immer dort eingesetzt, wo sich Anwendungsfälle schnell ändern können, aber eine Softwarelösung zu langsam wäre. Ein weiteres Feld sind kleine Stückzahlen von Spezialhardware, bei denen die Kosten von speziellen Prozessoren zu groß wären. Bei all diesen Fällen ist es sinnvoll, FPGAs einzusetzen. Bei einigen dieser Fälle muss sich aber die Hardware im laufenden Betrieb ändern. Denkbar wäre zum Beispiel eine in einem FPGA implementierte Firewall. Dabei wäre es sinnvoll, wenn diese im laufenden Betrieb Analyselogik nachladen könnte. Diese Möglichkeiten bieten partiell rekonfigurierbare FPGAs. Sie ermöglichen es einen Teil des FPGAs zu konfigurieren während andere Teile unberührt bleiben. Diese Technik ist noch relativ neu und nicht sehr gut erforscht. Zum Zwecke der Forschung und auch der Ausbildung zukünftiger FPGA-ExpertInnen braucht man einen FPGA, der vollständig dokumentiert und verstanden ist und den man während der Arbeit genau analysieren kann. Die Komplexität des Themas FPGA ließ es als unrealistisch erscheinen, einen wirklichen FPGA zu erstellen der ähnlich aufgebaut ist wie „normale“ FPGAs und den man bis in alle Details beobachten kann. Ziel dieser Arbeit ist es einen solchen FPGA zu erstellen, der in VHDL spezifiziert ist und somit „virtuell“ auf einem echten FPGA implementiert und getestet werden kann.
Cross-Molecular Coupling in Combined Photoassociation and Feshbach Resonances
Creators: name: Mackie, Matt
name: Fenty, Matthew
name: Savage, Danielle
name: Kesselman, Jake
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We model combined photoassociation and Feshbach resonances in a Bose-Einstein condensate. When the magnetic field is far-off resonance, cross coupling between the two target molecules--enabled by the shared dissociation continuum--leads to an anomalous dispersive shift in the position of laser resonance, as well as unprecedented elimination and enhancement of resonant photoassociation via quantum interference. For off-resonant lasers, a dispersive shift and quantum interference appear similarly in resonant three-body Feshbach losses, except that the Feshbach node is tunable with intensity.
description: 4 pages, 2 figs, 22+ refs; v2 improved abstract, refined discussion of exptl motivation, improved word choice in discussion of future work; to appear in Phys. Rev. Lett
Diffraction Gratings for Neutrons from Polymers and Holographic Polymer-Dispersed Liquid Crystals
Creators: name: Fally, M.
name: Bichler, M.
name: Ellabban, M. A.
name: Olenik, I. Drevensek
name: Pruner, C.
name: Eckerlebe, H.
name: Pranzas, K. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We discuss the applicability of holographically recorded gratings in photopolymers and holographic polymer-dispersed liquid crystals as neutron optical elements. An experimental investigation of their properties for light and neutrons with different grating spacings and grating thicknesses is performed. The angular dependencies of the diffraction efficiencies for those gratings are interpreted in terms of a rigourous coupled wave analysis. Starting from the obtained results we work out the lines for the production of an optimised neutron optical diffraction grating, i.e., high diffraction efficiency in the Bragg diffraction regime with moderate angular selectivity.
description: 16 pages, 7 figures, title changed, fig 1 skipped, fig 3 changed
Spin$^c$ structures on Hantzsche-Wendt manifolds
Creators: name: Lutowski, Rafał
name: Popko, Jerzy
name: Szczepański, Andrzej
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Topology (math.AT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Using a combinatorial description of Stiefel-Whitney classes of closed flat manifolds with diagonal holonomy representation, we show that no Hantzsche-Wendt manifold of dimension greater than three does not admit a spin$^c$ structure.
Effects of pyruvate administration on infarct volume and neurological deficits following permanent focal cerebral ischemia in rats
Creators: name: Gonzalez-Falcon, A.
name: Candelario-Jalil, E.
name: Garcia-Cabrera, M.
name: Leon, O. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: Recent experimental evidences indicate that pyruvate, the final metabolite of glycolysis, has a remarkable protective effect against different types of brain injury. The purpose of this study was to assess the neuroprotective effect and the neurological outcome after pyruvate administration in a model of ischemic stroke induced by permanent middle cerebral artery occlusion (pMCAO) in rats. Three doses of pyruvate (250, 500 and 1000 mg/kg, i.p.) or vehicle were administered intraperitoneally 30 min after pMCAO. In other set of experiments, pyruvate was given either before, immediately after ischemia or in a long-term administration paradigm. Functional outcome, mortality and infarct volume were determined 24 h after stroke. Even when the lowest doses of pyruvate reduced mortality and neurological deficits, no concomitant reduction in infarct volume was observed. The highest dose of pyruvate increased cortical infarction by 27% when administered 30 min after pMCAO. In addition, when pyruvate was given before pMCAO, a significant increase in neurological deficits was noticed. Surprisingly, on the contrary of what was found in the case of transient global ischemia, present findings do not support a great neuroprotective role for pyruvate in permanent focal cerebral ischemia, suggesting two distinct mechanisms involved in the effects of this glycolytic metabolite in the ischemic brain.
RUX KEKLARINI PIROMETALLURGIK QAYTA ISHLASHDA VELS PECHINING KLINKER HOSIL BO'LISH ZONASIGA KALSIY OKSIDI VA KREMNIY OKSIDLARINING TA'SIRLARINI O'RGANISH
Creators: name: Jalolov, B.A.
name: Baratova, S.S.
name: Baratova, M.A.
Publisher: name: Zenodo
Year: 2023

description: Jarayon vaqtida rux (Zn) ning uchish darajasida kalsiy oksidi (CaO) ning ta’sirini o‘rganish vaqtida olovbardosh g‘ishtlarning yemirilish moduli ko‘rsatkichi CaO/SiO2=0,8-1,0 ni tashkil etdi. CaO qo‘shib filtrlash jarayonidan so‘ng olingan rux (Zn) keki tarkibida CaO/SiO2=0,4-0,6ni tashkil etdi. Sanoat tajribasini o‘tkazish vaqtida vels pechining klinker hosil bo‘lish maydonida qo‘shimcha kalsiy oksidi kirgizish zarurati kuzatildi.
Lntp : the implementation and performance of a new local area network transport protocol
Creators: name: Robinson, James Beresford
Publisher: name: University of British Columbia
Year: 2010

description: In the past it has been convenient to adopt existing long haul network (LHN) protocols for use in local area networks (LANs). However, due to the different operating parameters that exist between these two types of networks, it is not possible for a LHN protocol to fully exploit the characteristics of a LAN. Thus, the need arises for a protocol designed specifically for use in a LAN environment. LNTP is one such transport level protocol. It was designed for exclusive use in LANs, and thus does not incorporate those features which are not relevant to a LAN environment. The result of this is a simpler and more efficient protocol. As well, LNTP employs a novel deferred flow control strategy which minimizes the time that a transmitting process will be blocked. This thesis examines the implementation of LNTP in the 4.2 BSD UNIX operating system. Various measurements are taken, and LNTP's performance is compared to that of TCP/IP, a LHN protocol which is often used in LAN environments. Several formulas are developed to determine the optimum values for various LNTP parameters, and these theoretical results are compared to the experimentally observed values. We conclude that LNTP does indeed outperform TCP/IP. However, due to the overhead of the non-LNTP specific protocol layers, this improvement is not as great as it might be. Nonetheless, LNTP proves itself to be a viable replacement for TCP/IP.
Additional file 1: of Dosage imbalance of B- and C-class genes causes petaloid-stamen relating to F1 hybrid variation
Creators: name: Liu, Jing
name: Li, Chao-Qun
name: Dong, Yang
name: Yang, Xia
name: Wang, Yin-Zheng
Publisher: name: figshare
Year: 2018
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology

description: Figure S1. The plants of Petrocosmea glabristoma (â ), P. sericea (â ) and their F1 hybrids. Figure S2. Sequence alignment of the MADS-box proteins and Neighbor-joining tree of DEF-like genes. Figure S3. Sequence alignment of AP2-like proteins. Figure S4. Sequence alignment of PseCYC1C/D and PgCYC1C/D with other related proteins. Figure S5. SNP identification of DEF2, GLO and PLE genes in Petrocosmea glabristoma and P. sericea. Figure S6. Morphology of wild-type and mutant flowers in the hybrids of Petrocosmea glabristoma crossed with other Petrocosmea species. Table S1. Primers used for gene isolation in this study. Table S2. Primers used for Real-time PCR in this study. Table S3. Primers used for allele-specific Real-time PCR in this study. (DOC 2903 kb)
Contrast agents and renal cell apoptosis
Creators: name: Romano, Giulia
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2008

description: Contrast media (CM) induce a direct toxic effect on renal tubular cells. This toxic effect may have a role in the
pathophysiology of contrast nephropathy.
I evaluated: (i) the cytotoxicity of CM [both low-osmolality (LOCM) and iso-osmolality (IOCM)], of iodine alone,and of an hyperosmolar solution (mannitol 8%) on human embryonic kidney (HEK 293), porcine proximal renal
tubular (LLC-PK1), and canine Madin–Darby distal tubular renal (MDCK) cells; and (ii) the effectiveness of
various antioxidant compounds [N-acetylcysteine (NAC), ascorbic acid and sodium bicarbonate] in preventing CM
cytotoxicity. The cytotoxicity of CM was assessed at different time points, with different methods: cell viability,DNA laddering, flow cytometry, and caspase activation.
Both LOCM and IOCM produced a concentration- and time-dependent increase in cell death as assessed by the
different methods. On the contrary, iodine alone and hyperosmolar solution did not induce any significant cytotoxic effect. There was not any significant difference in the cytotoxic effect between LOCM and IOCM. Furthermore, both LOCM and IOCM caused a marked increase in caspase-3 and -9 activities and poly(ADP-ribose) fragmentation, while
no effect on caspase-8/-10 was observed, thus indicating that the CM activated apoptosis mainly through the intrinsic
pathway. Both CM induced an increase in protein expression levels of pro-apoptotic members of the Bcl2 family (Bim
and Bad). NAC and ascorbic acid but not sodium bicarbonate had a dose-dependent protective effect on renal cells
after 3 h incubation with high dose (200 mg iodine/mL) of both LOCM and IOCM. Both LOCM and IOCM induce a dose-dependent renal cell apoptosis. NAC and ascorbic acid but not sodium bicarbonate prevent this contrast-induced apoptosis.
Confined Penrose process with charged particles
Creators: name: Kokubu, Takafumi
name: Li, Shou-Long
name: Wu, Puxun
name: Yu, Hongwei
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that kinematics of charged particles allows us to model the growth of particles' energy by consecutive particle-splits, once a spherical mirror as a perfectly reflective boundary is placed outside a charged black hole. We consider a charged version of the Penrose process, in which a charged particle decays into two fragments, one of them has negative energy and the other has positive energy that is larger than that of the parent particle. The confinement system with the mirror makes the particles' energy amplified each time a split of the parent particle occurs. Thus, the energy is a monotonically increasing function of time. However, the energy does not increase unboundedly, but rather asymptotes to a certain finite value, implying no instability of the system in this respect.
description: 16 pages, 5 figures, typo corrected, miscalculation fixed, version accepted for PRD
Investigation of stimulated dynamics in strongly anisotropic high-temperature superconductors system Bi-Pb-Sr-Ca-Cu-O
Creators: name: Chigvinadze, J. G.
name: Ashimov, S. M.
name: Machaidze, T. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It is used the mechanical method of Abrikosov vortex stimulated dynamics investigation in superconductors. With its help it was studied relaxation phenomena in vortex matter of high-temperature superconductors. It established that pulsed magnetic fields change the course of relaxation processes taking place in vortex matter. The study of the influence of magnetic pulses differing by their durations and amplitudes on vortex system of strongly anisotropic high-temperature superconductors system Bi1.7Pb0.3Sr2Ca2Cu3O10-d showed the presence of threshold phenomena. The small duration pulses do not change the course of relaxation processes taking place in vortex matter. When the duration of pulses exceeds some critical value (threshold), then their influence change the course of relaxation process which is revealed by stepwise change of relaxing mechanical moment.. These investigation showed that the time for formatting of Abrikosov vortex lattice in Bi1.7Pb0.3Sr2Ca2Cu3O10-d is of the order of 150 us which on the order of value exceeds the time necessary for formation of a single vortex observed in isotropic high-temperature superconductor HoBa2Cu3O7-d and on two orders exceeds the creation time of a single vortex observed in classical type II superconductors.
description: 6 pages, 0 figures
Thermo-mechanical properties of nitrogenated holey graphene (C2N): A comparison of machine-learning-based and classical interatomic potentials
Creators: name: Arabha, Saeed
name: Rajabpour, Ali
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermal and mechanical properties of two-dimensional nanomaterials are commonly studied by calculating force constants using the density functional theory (DFT) and classical molecular dynamics (MD) simulations. Although DFT simulations offer accurate estimations, the computational cost is high. On the other hand, MD simulations strongly depend on the accuracy of interatomic potentials. Here, we investigate thermal conductivity and elastic modulus of nitrogenated holey graphene (C2N) using passively fitted machine-learning interatomic potentials (MLIPs), which depend on computationally inexpensive ab-initio molecular dynamics trajectories. Thermal conductivity of C2N is investigated via MLIP-based non-equilibrium molecular dynamics simulations (NEMD). At room temperature, the lattice thermal conductivity of 85.5 W/m-K and effective phonon mean free path of 37.16 nm are found. By carrying out uniaxial tension simulations, the elastic modulus, ultimate strength, and fractural strain of C2N are predicted to be 390 GPa, 42 GPa, and 0.29, respectively. It is shown that the passively fitted MLIPs can be employed as an efficient interatomic potential to obtain the thermal conductivity and elastic modulus of C2N utilizing classical MD simulations. Moreover, the possibility of employing MLIPs to simulate C2N with point defects has been investigated. By training MLIP with point defect configurations, the mechanical properties of defective structures were studied. Although using the MLIP is more costly than classical interatomic potentials, it could efficiently predict the thermal and mechanical properties of 2D nanostructures.
Patologia cervicale e nuove metodologie diagnostico terapeutiche
Creators: name: Lavitola, Giada
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: la cervice uterina è un distretto anatomico molto complesso, può essere sede di patologie infettive, preneoplastiche e neoplastiche. tra le patologie infettive, la più diffusa oggi è l' infezione da HPV diagnosticabile con svariati test in commercio e,  prevenibile con l'attuale vaccinazione. la cervice uterina, inoltre può essere sede di patologia displastica e neoplastica sia di natura squamosa che ghiandolare, e continnuum di patologie neoplastiche endometriali. pertanto, risulta importante acquisire nuove tecniche diagnostiche che ne permettano una completa e adeguata valutazione al fine di ottimizzare e personalizzare i trattamenti chirurgici
Rezension: "Roberto Bolaños wilde Bibliothek. Eine Ästhetik und Politik der Lektüre" von Benjamin Loy
Creators: name: Wintersteiger, Christina
Publisher: name: Medienimpulse
Year: 2021

description: Benjamin Loys beeindrucke Monografie ist das Ergebnis einer quellenintensiven Studie auf der Spurensuche quer durch Roberto Bolaños Werk. Loy gelingt die Darstellung intertextueller Bezüge, die Identifikation politischer und ästhetischer Diskurse, sowie die sorgfältige, systematische Aufarbeitung der Werke des posthum zum Kanon erhobenen Autors.
description: Medienimpulse, Bd. 59 Nr. 1 (2021): Mediale Gewalt als Problem: Darstellungen, Reflexionen und Herausforderungen
Ruthenium and hafnium abundances in giant and dwarf barium stars
Creators: name: Allen, D. M.
name: de Mello, G. F. Porto
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present abundances for Ru and Hf, compare them to abundances of other heavy elements, and discuss the problems found in determining Ru and Hf abundances with laboratory gf-values in the spectra of barium stars. We determined Ru and Hf abundances in a sample of giant and dwarf barium stars, by the spectral synthesis of two RuI (4080.574A and 4757.856A) and two HfII (4080.437A and 4093.155A) transitions. The stellar spectra were observed with FEROS/ESO, and the stellar atmospheric parameters lie in the range 4300 < Teff/K < 6500, -1.2 < [Fe/H] <= 0 and 1.4 <= log g < 4.6. The HfII 4080A and the RuI 4758A observed transitions result in a unreasonably high solar abundance, given certain known uncertainties, when fitted with laboratory gf-values. For these two transitions we determined empirical gf-values by fitting the observed line profiles of the spectra of the Sun and Arcturus. For the sample stars, this procedure resulted in a good agreement of Ru and Hf abundances given by the two available lines. The resulting Ru and Hf abundances were compared to those of Y, Nd, Sm and Eu. In the solar system Ru, Sm and Eu are dominated by the r-process and Hf, Nd and Y by the s-process, and all of these elements are enhanced in barium stars since they lie inside the s-process path. Ru abundances show large scatter when compared to other heavy elements, whereas Hf abundances show less scatter and closely follow the abundances of Sm and Nd, in good agreement with theoretical expectations. We also suggest a possible, unexpected, correlation of Ru and Sm abundances. The observed behaviour in abundances is probably due to variations in the 13C pocket efficiency in AGB stars, and, though masked by high uncertainties, hint at a more complex scenario than proposed by theory.
description: 11 pages, 7 figures and 7 tables. accepted to A&A
Constrained exact boundary controllability of a semilinear model for pipeline gas flow
Creators: name: Gugat, Martin
name: Habermann, Jens
name: Hintermüller, Michael
name: Huber, Olivier
Publisher: name: Weierstrass Institute
Year: 2021
Subjects: subject: Gas pipeline flow
subject: exact controllability
subject: continuous solutions
subject: constrained exact controllability
subject: boundary control
subject: method of characteristics
subject: 93B05
subject: 93C10

description: While the quasilinear isothermal Euler equations are an excellent model for gas pipeline flow, the operation of the pipeline flow with high pressure and small Mach numbers allows us to obtain approximate solutions by a simpler semilinear model. We provide a derivation of the semilinear model that shows that the semilinear model is valid for sufficiently low Mach numbers and sufficiently high pressures. We prove an existence result for continuous solutions of the semilinear model that takes into account lower and upper bounds for the pressure and an upper bound for the magnitude of the Mach number of the gas flow. These state constraints are important both in the operation of gas pipelines and to guarantee that the solution remains in the set where the model is physically valid. We show the constrained exact boundary controllability of the system with the same pressure and Mach number constraints.
A Model for Programmability and Virtuality in Dynamical Neural Networks
Creators: name: Donnarumma, Francesco
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: In this dissertation a fixed-weight architecture for Continuous Time Recurrent Neural Networks (CTRNNs) is proposed in order to give an account for biological phenomena, controlled by neuronal activity, in which changes of behavior occur so fast that presumably no changes in the involved neuronal connectivity are possible.

The proposed model possesses the following properties: a. the neural network variables have a direct biological interpretation; b. the change of behavior is controllable by auxiliary (programming) inputs; c. a single fixed-weight neural network has the capability to exhibit a wide repertoire of different behaviors given the appropriate auxiliary inputs. Such properties allow the model to be biologically plausible on the neural level and, at the same time, should sustain a programmability / virtuality capability usually associated only with the algorithmic, symbolic systems used in the high level functional modeling of biological systems.

A number of experiments are performed which corroborate: 1) the capability of the proposed architecture to be programmed with auxiliary inputs in order to reproduce the dynamical behaviors of networks with weight values coded by the auxiliary input; 2) the robustness of the proposed architecture w.r.t. variations of the I/O time scales.
title: Infrastruktur-Konzept Semizentral zur Implementierung in China - Konzept, Planung, Genehmigung, Bewertung -
Creators: name: Wang, Bingxiang
Publisher: name: UNSPECIFIED
Year: 2021

description: China ist das bevölkerungsreichste Land der Welt und durchläuft einen rasanten Urbanisierungsprozess, der die Notwendigkeit eines starken und schnellen Aus- und Neubau der städtischen Infrastruktur hervorruft. Des Weiteren ist China ein Land mit großem Wassermangel. Die Verknappung der Wasserressourcen verhindert die wirtschaftliche und industrielle Entwicklung vieler chinesischer Städte. Um das Problem des städtischen Wasserstresses zu lösen, setzt die chinesische Regierung auf die Wasserwiederverwendung. Der Infrastrukturansatz Semizentral wurde als mögliche Lösung für die infrastrukturellen Herausforderungen im Bereich Wasserver- und Entsorgung in Städte, besonders in schnell wachsenden Räumen, entwickelt. Das Resource Recovery Center (RRC) ist dabei eine mögliche Umsetzungsform des Semizentral-Konzepts und wurde erfolgreich im chinesischen Qingdao umgesetzt. Das RRC wurde mit dem Ziel errichtet, eine umfangreiche Kreislaufwirtschaft hinsichtlich Wasser und auch Biomasse im Zusammenhang mit einer zukünftigen Siedlungsentwicklung zu erreichen. Die Analyse der Planungs-, Genehmigungs- und Bauphase sowie des Betriebes des RRCs in dieser Arbeit stellt insofern eine theoretische Grundlage für die weitere Verbreitung semizentraler Ver- und Entsorgungsinfrastrukturlösungen dar. Durch diese ganzheitliche Beurteilung des RRC mit Hilfe der SWOT-Analyse wurden die internen und externen Einflussfaktoren des RRC ermittelt. Die Ergebnisse sind eine wichtige strukturierte Grundlage für Entscheidungsträger, um künftig semizentrale Konzepte zu realisieren und so der rasanten Siedlungsentwicklung unter Wasserknappheit besser zu begegnen.
Comparison of Geant4 hadron generation with data from the interactions with beryllium nuclei of +8.9 GeV/c protons and pions, and of -8 GeV/c pions
Creators: name: Bolshakova, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Hadron generation in the Geant4 simulation tool kit is compared with inclusive spectra of secondary protons and pions from the interactions with beryllium nuclei of +8.9 GeV/c protons and pions, and of -8.0 GeV/c pions. The data were taken in 2002 at the CERN Proton Synchrotron with the HARP spectrometer. We report on significant disagreements between data and simulated data especially in the polar-angle distributions of secondary protons and pions.
description: 15 pages, 13 figures
title: Ανάλυση Χωρικής Πλημμυρικής Επικινδυνότητας στη περιοχή Τυμπακίου Κρήτης
Creators: name: Γριβα Μαρια
Publisher: name: Technical University of Crete
Year: 2021

description: Η παρούσα διπλωματική εργασία εστιάζει στην εκτίμηση της πλημμυρικής επικινδυνότητας στην περιοχή του Τυμπακίου, με τη χρήση πολυκριτηριακής ανάλυσης σε περιβάλλον Γεωγραφικών Συστημάτων Πληροφοριών (GIS). Για την χωρική εκτίμηση της πλημμυρικής επικινδυνότητας πραγματοποιήθηκε χαρτογράφηση και απεικόνιση έξι ποσοτικών θεματικών χαρτών raster (καννάβου), οι οποίοι συνδυάστηκαν χωρικά με σκοπό τη δημιουργία του χάρτη συνολικής πλημμυρικής επικινδυνότητας της περιοχής μελέτης. Οι έξι παράγοντες που βασίστηκε η μελέτη μας και επηρεάζουν την επιρρέπεια μιας περιοχής στη πρόκληση πλημμυρικού φαινομένου είναι: α) το Υψόμετρο, β) η Κλίση, γ) η Συγκέντρωση Ροής, δ) η Υδρογεωλογία, ε) οι Χρήσεις Γης και στ) η Ένταση της Βροχόπτωσης. Η πλημμυρική επικινδυνότητα κατηγοριοποιήθηκε, για κάθε ένα από τους παράγοντες, σε πέντε κλάσεις: Πολύ Χαμηλή (1), Χαμηλή (2), Μέτρια (5), Υψηλή (8) και Πολύ Υψηλή (10), με βάση την μέθοδο Natural Breaks (Jenks). Κατόπιν, ακολουθώντας την κατάλληλη μεθοδολογία και με τη χρήση των συντελεστών βαρύτητας, που προέκυψαν από την ποσοτικοποίηση της επίδρασης του εκάστοτε παράγοντα στην συνολική πλημμυρική επικινδυνότητα, κατασκευάστηκε ο τελικός χάρτης πλημμυρικής επικινδυνότητας της περιοχής μελέτης. Τα αποτελέσματα από την μελέτη που υλοποιήθηκε αποδεικνύουν ό,τι η περιοχή του Τυμπακίου χαρακτηρίζεται από υψηλό πλημμυρικό κίνδυνο στο μεγαλύτερο μέρος της. Η αξιοπιστία του τελικού χάρτη πλημμυρικής επικινδυνότητας επαληθεύεται μέσω μελέτης που έχει πραγματοποιηθεί και προσδιορίζει την περιοχή μελέτης ως ζώνη δυνητικά υψηλού πλημμυρικού κινδύνου. Επίσης, η μελέτη δεν περιορίστηκε μόνο στο προσδιορισμό του πλημμυρικού κινδύνου  σύμφωνα τα τωρινά δεδομένα που επικρατούν στην ευρύτερη περιοχή αλλά διαμορφώθηκαν δύο επιπλέον σενάρια βασισμένα στην αλλαγή των χρήσεων γης, με σκοπό την πρόβλεψη της μελλοντικής πλημμυρικής επικινδυνότητας. Στο πρώτο σενάριο τα σύνθετα συστήματα καλλιεργειών μετατράπηκαν σε άνυδρες καλλιέργειες, μειώνοντας με αυτό τον τρόπο πλημμυρικό κίνδυνο, ενώ στο δεύτερο σενάριο κατασκευάστηκε μια αστική ζώνη στο παραλιακό μέτωπο της περιοχής με στόχο να επιφέρει τα αντίθετα αποτελέσματα. Για τα δύο σενάρια δημιουργήθηκαν θεματικοί χάρτης χρήσεων γης και χάρτες συνολικής πλημμυρικής επικινδυνότητας, ώστε να ερευνηθεί η επίδραση τους στην δημιουργία πλημμυρικών φαινομένων.
Sums of lens spaces bounding rational balls
Creators: name: Lisca, Paolo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25

description: We classify connected sums of three-dimensional lens spaces which smoothly bound rational homology balls. We use this result to determine the order of each lens space in the group of rational homology 3-spheres up to rational homology cobordisms, and to determine the concordance order of each 2-bridge knot.
description: 20 pages, 4 figures
Different atom trapping geometries with time averaged adiabatic potentials
Creators: name: Sarkar, Sourabh
name: Ram, S. P.
name: Tiwari, V. B.
name: Mishra, S. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In this article, we have theoretically studied the time averaged adiabatic potential (TAAP) scheme for realizing different atom trapping geometries. It is shown that by varying time orbiting potential (TOP) fields and radio frequency (rf) fields parameters, controlled manipulation of trapping potentials, and conversion from one trapping geometry to another, is possible. The proposed trapping geometries can be useful for studying various atom-optic phenomena such as Bose-Einstein condensation (BEC) in low dimensions, super-fluidity, tunnelling, atom interferometry, etc.
Recombination dynamics in zinc oxide
Creators: name: Santamaria Amato, Luigi
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: In this work were studied the recombination dynamics of electron hole pairs in Zinc Oxide bulk crystal and nanowires using time resolved, time integrated and excitation resolved photoluminescence measurements.
In particular are shown some experimental results regarding possible gas sensing applications of ZnO nanowires and some optical properties of this material confirming it as promising material for optoelectronics.
Also a characterization of ZnO bulk crystal is performed, in particular the study of high injection effects is described.
Moreover are explained some models showing that is possible to use time resolved photoluminescence measurements (TRPL) to obtain information on semiconductor materials, then these models are tested on ZnO bulk crystal.
Three different routes from the directed Ising to the directed percolation class
Creators: name: Park, Su-Chan
name: Park, Hyunggyu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Scaling nature of absorbing critical phenomena is well understood for the directed percolation (DP) and the directed Ising (DI) systems. However, a full analysis of the crossover behavior is still lacking, which is of our interest in this study. There are three different routes from the DI to the DP classes by introducing a symmetry breaking field (SB), breaking a modulo 2 conservation (CB), or making channels connecting two equivalent absorbing states (CC). Each route can be characterized by a crossover exponent, which is found numerically as $ϕ=2.1\pm 0.1$ (SB), $4.6\pm 0.2$ (CB), and $2.9\pm 0.1$ (CC), respectively. The difference between the SB and CB crossover can be understood easily in the domain wall language, while the CC crossover involves an additional critical singularity in the auxiliary field density with the memory effect to identify itself independent.
description: 7 pages, 6 figures
Probing dark exciton navigation through a local strain landscape in a WSe$_2$ monolayer
Creators: name: Gelly, Ryan J.
name: Renaud, Dylan
name: Liao, Xing
name: Pingault, Benjamin
name: Bogdanovic, Stefan
name: Scuri, Giovanni
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Urbaszek, Bernhard
name: Park, Hongkun
name: Lončar, Marko
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Monolayers of transition metal dichalcogenides (TMDs) have recently emerged as a promising optoelectronic platform. To leverage their full potential, however, it is important to understand and engineer the properties of the different exciton species that exist in these monolayers, as well as to control their transport through the material. A promising approach relies on engineering strain landscapes in atomically thin semiconductors that excitons navigate. In WSe$_2$ monolayers, for example, localized strain has been used to control the emission wavelength of excitons, induce exciton funneling and conversion, and even realize single-photon sources and quantum dots. Before these phenomena can be fully leveraged for applications, including quantum information processing, the details of excitons' interaction with the strain landscape must be well understood. To address this, we have developed a cryogenic technique capable of probing the dynamics of both bright and dark excitons in nanoscale strain landscapes in TMDs. In our approach, a nanosculpted tapered optical fiber is used to simultaneously generate strain and probe the near-field optical response of WSe$_2$ monolayers at 5 K. When the monolayer is pushed by the fiber, its lowest energy photoluminescence (PL) peaks red shift by as much as 390 meV, (corresponding to 20% of the bandgap of an unstrained WSe$_2$ monolayer). The red-shifting peaks are polarized perpendicularly to the WSe$_2$ plane and have long rising times (10 ps) and lifetimes (52 ps), indicating that they originate from nominally spin-forbidden dark excitons. Taken together, these observations indicate that dark excitons are funneled to the high-strain regions during their long lifetime and are the principal participants in drift and diffusion at cryogenic temperatures. Our work elucidates the important role that dark excitons play in locally strained WSe$_2$.
description: 19 pages, 4 figures