cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Time Series Analysis
Creators: name: Diebold, F.X.
name: Kilian, L.
name: Nerlove, Marc
name: Diebold, F.X.
name: Kilian, L.
name: Nerlove, Marc
Publisher: name: Unknown
Year: 2006
Subjects: subject: Research Methods/ Statistical Methods
subject: time series analysis
subject: time domain
subject: frequency domain

description: We provide a concise overview of time series analysis in the time and frequency domains, with lots of references for further reading.
Electronic Supplementary Material - Text S1 from Predation of the giant Miocene caiman Purussaurus on a mylodontid ground sloth in the wetlands of proto-Amazonia
Creators: name: Pujos, François
name: Salas-Gismondi, Rodolfo
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: 40308 Palaeontology (incl. Palynology)
subject: FOS: Earth and related environmental sciences

description: Thirteen million years ago in South America, the Pebas Mega-Wetland System sheltered multi-taxon crocodylian assemblages, with the giant caiman Purussaurus as the top predator. In these Miocene swamps where reptiles and mammals coexisted, evidence of their agonistic interactions is extremely rare. Here, we report a tibia of the mylodontid sloth Pseudoprepotherium bearing 46 predation tooth marks. The combination of round and bisected, shallow pits and large punctures that collapsed extensive portions of cortical bone points to a young or sub-adult Purussaurus (approx. 4 m in total length) as the perpetrator. Other known crocodylians of the Pebas System were either too small at adulthood or had discordant feeding anatomy to be considered. The pattern of tooth marks suggests that the perpetrator attacked and captured the ground sloth from the lower hind limb, yet an attempt of dismembering cannot be ruled out. This discovery from the Peruvian Amazonia provides an unusual snapshot of the dietary preferences of Purussaurus and reveals that prior to reaching its giant size, young individuals might have fed upon terrestrial mammals of about the size of a capybara.
INTEGRATION AND CAUSALITY IN INTERNATIONAL FREIGHT MARKETS--MODELING WITH ERROR CORRECTION AND DIRECTED ACYCLIC GRAPHS
Creators: name: Haigh, Michael S.
name: Nomikos, Nikos K.
name: Bessler, David A.
name: Haigh, Michael S.
name: Nomikos, Nikos K.
name: Bessler, David A.
Publisher: name: Unknown
Year: 2002
Subjects: International Relations/Trade

description: Using Directed Acyclic Graphs (DAG's) and Error Correction Models we study the dynamics of the notoriously volatile international freight prices that comprise the Baltic Panamax Index, the index on which freight futures trading is based. The DAG's are used to make definitive statements about the contemporaneous correlations between prices and allow us to address the construction of the data-determined orthoganization on contemporaneous innovation covariance, critical in providing sound inference in innovation accounting techniques. Our results provide a rich source of information on price discovery over various time horizons and suggest that the index may not be appropriately comprised and weighted.
Dynamical instability of fluid spheres in the presence of a cosmological constant
Creators: name: Boehmer, C. G.
name: Harko, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The equations describing the adiabatic, small radial oscillations of general relativistic stars are generalized to include the effects of a cosmological constant. The generalized eigenvalue equation for the normal modes is used to study the changes in the stability of the homogeneous sphere induced by the presence of the cosmological constant. The variation of the critical adiabatic index as a function of the central pressure is studied numerically for different trial functions. The presence of a large cosmological constant significantly increases the value of the critical adiabatic index. The dynamical stability condition of the homogeneous star in the Schwarzschild-de Sitter geometry is obtained and several bounds on the maximum allowable value for a cosmological constant are derived from stability considerations.
description: 20 pages, 3 figures, to be published in PRD; improved appendix, two references corrected; references corrected
Magnetic structure and exchange interactions in the layered semiconductor CrPS4
Creators: name: Calder, S.
name: Haglund, A. V.
name: Liu, Y.
name: Pajerowski, D. M.
name: Cao, H. B.
name: Williams, T. J.
name: Garlea, V. O.
name: Mandrus, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Compounds with two-dimensional (2D) layers of magnetic ions weakly connected by van der Waals bonding offer routes to enhance quantum behavior, stimulating both fundamental and applied interest. CrPS4 is one such magnetic van der Waals material, however, it has undergone only limited investigation. Here we present a comprehensive series of neutron scattering measurements to determine the magnetic structure and exchange interactions. The observed magnetic excitations allow a high degree of constraint on the model parameters not normally associated with measurements on a powder sample. The results demonstrate the 2D nature of the magnetic interactions, while also revealing the importance of interactions along 1D chains within the layers. The subtle role of competing interactions is observed, which manifest in a non-trivial magnetic transition and a tunable magnetic structure in a small applied magnetic field through a spin-flop transition. Our results on the bulk compound provide insights that can be applied to an understanding of the behavior of reduced layer CrPS4.
CAUSES OF RURAL ECONOMIC DEVELOPMENT
Creators: name: Gardner, Bruce L.
name: Gardner, Bruce L.
Publisher: name: Unknown
Year: 2003
Subjects: Community/Rural/Urban Development

description: This paper investigates the sources of growth in agricultural value-added (GDP) and rural household incomes using a sample of developing countries. The main factors are: (i) providing macroeconomic and political stability; (ii) institutions establishing property rights and incentives; (iii) access to competitive input markets and remunerative output markets; and (iv) adoption of productivity-enhancing technology, and (v) real income growth in the non-agricultural economy. The evidence indicates a surprisingly large role of the fifth of these.
SEPARABILITY OF STOCHASTIC PRODUCTION DECISIONS FROM PRODUCER RISK PREFERENCES IN THE PRESENCE OF FINANCIAL MARKETS
Creators: name: Chambers, Robert G.
name: Quiggin, John C.
name: Chambers, Robert G.
name: Quiggin, John C.
Publisher: name: Unknown
Year: 2002
Subjects: Financial Economics
Production Economics
Risk and Uncertainty

description: This paper presents a unified treatment of the production and financial decisions available to a firm facing frictionless financial markets and a stochastic production technology under minimal assumptions on the firm's stochastic technology and objective function. The specific focus is on separation results for stochastic technologies, that is, on conditions under which the optimal production decision may be determined without regard to the risk preferences of the firm's owners. Necessary and sufficient conditions for separation, which generalize existing results, are presented.
Supplementary information from Natural barriers: waterfall transit by small flying animals
Creators: name: Ortega-Jimenez, Victor M.
name: Herbst, Eva C.
name: Leung, Michelle
name: Dudley, Robert
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 110601 Biomechanics
subject: FOS: Health sciences
subject: 91504 Fluidisation and Fluid Mechanics
subject: FOS: Other engineering and technologies

description: Supplementary tables, video legend and raw data description
On spinning loop amplitudes in Anti-de Sitter space
Creators: name: Albayrak, Soner
name: Kharel, Savan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work we present a systematic study of AdS$_{d+1}$ loop amplitudes for gluons and gravitons using momentum space techniques. Inspired by the recent progress in tree level computation, we construct a differential operator that can act on a scalar factor in order to generate gluon and graviton loop integrands: this systematizes the computation for any given loop level Witten diagram. We then give a general prescription in this formalism, and discuss it for bubble, triangle, and box diagrams.
description: 26 pages, 1 figure
Rainieri, Osvaldo: Atti di Habta Maryam (✝1497) e di Iyāsu(✝1508) santi monaci etiopici
Creators: name: Kropp, Manfred
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 81 (1997): Oriens christianus, Band 81
ENVIRONMENTAL REGULATION IN VERTICALLY COORDINATED INDUSTRIES
Creators: name: Aggarwal, Rimjhim
name: Lichtenberg, Erik
name: Aggarwal, Rimjhim
name: Lichtenberg, Erik
Publisher: name: Unknown
Year: 2001
Subjects: Environmental Economics and Policy
Industrial Organization

description: Many notable pollution problems occur in industries where production is carried out under vertical coordination arrangements that are characterized by conditions of double moral hazard. In contrast to situations characterized by full information, we show that standard prescriptions of environmental economics do not apply. Imposing a Pigouvian tax equal to the marginal cost of pollution does not lead to the first best level of pollution. The equilibrium levels of production and pollution are not independent of which agent is taxed. Making either agent or the industry as a whole financially liable for full environmental damage at the margin similarly does not lead to a first best level of pollution. On the contrary, under conditions of double moral hazard, the industry should pay for less than the full cost of environmental damage. At present, only one agent (if any) is typically liable for environmental damage. We derive conditions under which imposing new regulations that make only one agent financially responsible for the full cost of environmental damage (as conventional wisdom in environmental policy suggests) is excessively stringent in that it results in pollution and production that are less than the first best levels. We also show that such new regulations could result in negatively correlated deviations of pollution and production from their first best levels, a situation that cannot arise under conditions of complete information.
IS INTELLECTUAL PROPERTY RIGHT LEGISLATION CONSTRAINING THE AGRIFOOD BIOTECHNOLOGY SECTOR IN THE EUROPEAN UNION?
Creators: name: Gil-Delgado, Maria De Los Reyes Corripio
name: Diez, Maria Del Carmen Fernandez
name: Gil-Delgado, Maria De Los Reyes Corripio
name: Diez, Maria Del Carmen Fernandez
Publisher: name: Unknown
Year: 2003
Subjects: Research and Development/Tech Change/Emerging Technologies

description: In this paper, we discuss the implications of the recent Intellectual Propriety Right (IPR) enforcement in the European Union (EU) as a potential factor affecting agrifood biotechnology industry stagnation. After presenting a theoretical framework justifying patents, we describe some controversial questions in the European patent protection related to: a) the distinction between discovery and invention and; b) the morality and ordre public exception to the patentability. Although we provide some evidence about the reduction in importance of agrifood activities compared to that of pharmaceutical areas of application, we conclude that differences between EU and other developed countries IPR legislations are not the principal regulatory controversial factor affecting activities in the agrifood biotechnology sector.
The online and offline properties of routing algorithms in MPLS
Creators: name: Wong, Serene Wing Hang
Publisher: name: University of British Columbia
Year: 2009

description: This thesis focuses on the route allocation problem. In particular, we consider how to optimally place a LSP on a network such that the bandwidth demand is guaranteed. The objection function is throughput. Specifically, two metrics are used: the number of rejected requests and the amount of rejected bandwidth. We evaluate the performance of five routing algorithms: the shortest path algorithm, the widest-shortest path algorithm, the shortest-widest path algorithm, the minimum interference routing algorithm, and the profile-based routing algorithm. In addition, we investigate the sensitivity of history of the two more sophisticated routing algorithms: the minimum interference routing algorithm, and the profile-based routing algorithm. We explore the sensitivity of history through the use of the batch process scheme. The batch process scheme allocates tunnels for a batch of requests at a time, and can be viewed as a continuum with its ends being the online and offline scheme. We compare the performance of routing algorithms with varying batch sizes indicating the changes of the history information. The routing decisions that routing algorithms make significantly influence the performance of the network. Thus, it is beneficial to evaluate the performance of routing algorithms. Furthermore, with the batch process scheme, algorithms can make use of the history information in order to make better routing decisions which would greatly enhance the utilization of the network resources.
HEDONIC PRICE ANALYSIS OF EASEMENT PAYMENTS IN AGRICULTURAL LAND PRESERVATION PROGRAMS
Creators: name: Lovell, Sabrina J.
name: Lynch, Lori
name: Lovell, Sabrina J.
name: Lynch, Lori
Publisher: name: Unknown
Year: 2002
Subjects: Land Economics/Use

description: More than 110 state, county, and local governments have implemented agricultural land preservation programs to permanently preserve farmland. Assigning a value to the development is difficult and can be costly. Data was collected on 409 preservation transactions from 3 Maryland counties and supplemented with farm level spatial data via GIS. A hedonic price analysis is conducted to determine the marginal return to different farm characteristics using a spatial econometric model to correct for spatial correlation. Parcel characteristics such as distance to city and town, number of acres, prime soils and current land-use explain eighty percent of the variation in easement values. As expected, characteristics perform least well in explaining easement values in transfer of development right programs. This information can help formulate policy decisions and selection criteria to maximize the preservation of the agricultural economy and/or maximize public preferences. A supply curve is constructed using simulations that determine non-participant parcels' easement values. To preserve the remaining eligible acres in these three counties, $167 million would be needed. This method can support programs choosing to use a point system rather than the more costly and difficult to apply standard appraisal methods.
Manipulation of room-temperature Valley-Coherent Exciton-Polaritons in atomically thin crystals by real and artificial magnetic fields
Creators: name: Rupprecht, Christoph
name: Sedov, Evgeny
name: Klaas, Martin
name: Knopf, Heiko
name: Blei, Mark
name: Lundt, Nils
name: Tongay, Sefaattin
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Schulz, Ulrike
name: Kavokin, Alexey
name: Eilenberger, Falk
name: Höfling, Sven
name: Schneider, Christian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Strong spin-orbit coupling and inversion symmetry breaking in transition metal dichalcogenide monolayers yield the intriguing effects of valley-dependent optical selection rules. As such, it is possible to substantially polarize valley excitons with chiral light and furthermore create coherent superpositions of K and K- polarized states. Yet, at ambient conditions dephasing usually becomes too dominant, and valley coherence typically is not observable. Here, we demonstrate that valley coherence is, however, clearly observable for a single monolayer of WSe2, if it is strongly coupled to the optical mode of a high quality factor microcavity. The azimuthal vector, representing the phase of the valley coherent superposition, can be directly manipulated by applying magnetic fields, and furthermore, it sensibly reacts to the polarization anisotropy of the cavity which represents an artificial magnetic field. Our results are in qualitative and quantitative agreement with our model based on pseudospin rate equations, accounting for both effects of real and pseudo-magnetic fields.
description: 12 Pages, 5 Figures
Reduction of Guided Acoustic Wave Brillouin Scattering in Photonic Crystal Fibers
Creators: name: Elser, D.
name: Andersen, U. L.
name: Korn, A.
name: Gloeckl, O.
name: Lorenz, S.
name: Marquardt, Ch.
name: Leuchs, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Guided Acoustic Wave Brillouin Scattering (GAWBS) generates phase and polarization noise of light propagating in glass fibers. This excess noise affects the performance of various experiments operating at the quantum noise limit. We experimentally demonstrate the reduction of GAWBS noise in a photonic crystal fiber in a broad frequency range using cavity sound dynamics. We compare the noise spectrum to the one of a standard fiber and observe a 10-fold noise reduction in the frequency range up to 200 MHz. Based on our measurement results as well as on numerical simulations we establish a model for the reduction of GAWBS noise in photonic crystal fibers.
description: 4 pages, 7 figures; added numerical simulations, added references
Supplementary Information from Synthetic soil crusts against green-desert transitions: a spatial model
Creators: name: Blai Vidiella
name: Sardanyés, Josep
name: Solé, Ricard V.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Biological Engineering
subject: 60113 Synthetic Biology

description: This file contains Figures S1-S9
JDoonan_table S2_ESM.pdf from Host–microbiota–insect interactions drive emergent virulence in a complex tree disease
Creators: name: Doonan, James M.
name: Broberg, Martin
name: Denman, Sandra
name: McDonald, James E.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Science

description: Forest declines caused by climate disturbance, insect pests and microbial pathogens threaten the global landscape, and tree diseases are increasingly attributed to the emergent properties of complex ecological interactions between the host, microbiota and insects. To address this hypothesis, we combined reductionist approaches (single and polyspecies bacterial cultures) with emergentist approaches (bacterial incoluations in an oak infection model with the addition of insect larvae) to unravel the gene expression landscape and symptom severity of host–microbiota–insect interactions in the Acute Oak Decline (AOD) pathosystem. AOD is a complex decline disease characterized by predisposing abiotic factors, inner bark lesions driven by a bacterial pathobiome, and larval galleries of the bark-boring beetle Agrilus biguttatus. We identified expression of key pathogenicity genes in Brenneria goodwinii, the dominant member of the AOD pathobiome, tissue-specific gene expression profiles, cooperation with other bacterial pathobiome members in sugar catabolism, and demonstrated amplification of pathogenic gene expression in the presence of Agrilus larvae. This study highlights the emergent properties of complex host–pathobiota–insect interactions that underlie the pathology of diseases that threaten global forest biomes.
Pressure induced collapse of magnetic order in jarosite
Creators: name: Klein, Ryan A.
name: Walsh, James P. S.
name: Clarke, Samantha M.
name: Liu, Zhenxian
name: Alp, E. Ercan
name: Bi, Wenli
name: Meng, Yue
name: Altman, Alison B.
name: Chow, Paul
name: Xiao, Yuming
name: Norman, M. R.
name: Rondinelli, James M.
name: Jacobsen, Steven D.
name: Puggioni, Danilo
name: Freedman, Danna E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a pressure-induced phase transition in the frustrated kagomé material jarosite at ~45 GPa, which leads to the disappearance of magnetic order. Using a suite of experimental techniques, we characterize the structural, electronic, and magnetic changes in jarosite through this phase transition. Synchrotron powder X-ray diffraction and Fourier transform infrared spectroscopy experiments, analyzed in aggregate with the results from density functional theory calculations, indicate that the material changes from a R-3m structure to a structure with a R-3c space group. The resulting phase features a rare twisted kagomé lattice in which the integrity of the equilateral Fe3+ triangles persists. Based on symmetry arguments we hypothesize that the resulting structural changes alter the magnetic interactions to favor a possible quantum paramagnetic phase at high pressure.
description: Manuscript and Supplement included
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð° Ð´ÐµÑÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ°ÑÑÐ¸ÑÐ½ÑÑ ÑÐ°Ð·ÑÑÐ´Ð¾Ð² Ð² ÑÑÐ°Ð½ÑÑÐ¾ÑÐ¼Ð°ÑÐ¾ÑÐ°Ñ Ñ ÑÐ²ÑÑÐ´Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸ÐµÐ¹
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Development of a device for detecting partial discharges in transformers with solid insulation
Creators: name: ÐÐ½Ð´ÑÐµÐµÐ², ÐÐ°Ð²ÐµÐ»
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2024
Subjects: Ð¢ÑÐ°Ð½ÑÑÐ¾ÑÐ¼Ð°ÑÐ¾ÑÑ Ð¸Ð·Ð¼ÐµÑÐ¸ÑÐµÐ»ÑÐ½ÑÐµ
ÐÐ°ÑÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
ÑÐ°ÑÑÐ¸ÑÐ½ÑÐµ ÑÐ°Ð·ÑÑÐ´Ñ
ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½ÑÐµ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð°
Ð´ÐµÑÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
Ð´Ð°ÑÑÐ¸ÐºÐ¸
Ð¼Ð¾Ð½Ð¸ÑÐ¾ÑÐ¸Ð½Ð³ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸
partial discharges
electronic devices
detection
sensors
insulation monitoring

description: Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½ Ð²Ð¾Ð¿ÑÐ¾Ñ Ð´ÐµÑÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ°ÑÑÐ¸ÑÐ½ÑÑ ÑÐ°Ð·ÑÑÐ´Ð¾Ð² Ð² ÑÑÐ°Ð½ÑÑÐ¾ÑÐ¼Ð°ÑÐ¾ÑÐ°Ñ Ñ ÑÐ²ÐµÑÐ´Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸ÐµÐ¹. Ð¡Ð¾Ð·Ð´Ð°Ð½Ð° Ð¼Ð¾Ð´ÐµÐ»Ñ, Ð¸Ð¼Ð¸ÑÐ¸ÑÑÑÑÐ°Ñ Ð§Ð  Ð² Ð²ÑÑÐ¾ÐºÐ¾Ð²Ð¾Ð»ÑÑÐ½Ð¾Ð¼ ÑÐ¸Ð»Ð¸Ð½Ð´ÑÐ¸ÑÐµÑÐºÐ¾Ð¼ ÐºÐ¾Ð½Ð´ÐµÐ½ÑÐ°ÑÐ¾ÑÐµ. Ð¡ Ð¿Ð¾Ð¼Ð¾ÑÑÑ ÑÐ¾Ð·Ð´Ð°Ð½Ð½Ð¾Ð¹ Ð¼Ð¾Ð´ÐµÐ»Ð¸ Ð±ÑÐ»Ð° ÑÐ¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð° ÑÑÐµÐ¼Ð° Ð´Ð°ÑÑÐ¸ÐºÐ° Ð¸ Ð´ÐµÑÐµÐºÑÐ¾ÑÐ° ÑÐ°ÑÑÐ¸ÑÐ½ÑÑ ÑÐ°Ð·ÑÑÐ´Ð¾Ð², ÐºÐ¾ÑÐ¾ÑÑÐµ Ð¿Ð¾Ð·Ð²Ð¾Ð»ÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°ÑÑ Ð¸Ð·Ð¼ÐµÑÐ¸ÑÐµÐ»ÑÐ½ÑÑ ÑÐ°ÑÑÑ Ð²ÑÑÐ¾ÐºÐ¾Ð²Ð¾Ð»ÑÑÐ½Ð¾Ð³Ð¾ ÐºÐ¾Ð½Ð´ÐµÐ½ÑÐ°ÑÐ¾ÑÐ° Ð´Ð»Ñ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° ÑÑÐ¾Ð²Ð½Ñ ÑÐ°ÑÑÐ¸ÑÐ½ÑÑ ÑÐ°Ð·ÑÑÐ´Ð¾Ð². Ð¡ÑÐµÐ¼Ð° Ð´Ð°ÐµÑ Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÑ Ð² ÑÐµÐ¶Ð¸Ð¼Ðµ ÑÐµÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð²ÑÐµÐ¼ÐµÐ½Ð¸ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´Ð¸ÑÑ Ð¼Ð¾Ð½Ð¸ÑÐ¾ÑÐ¸Ð½Ð³ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ñ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸ Ð¿Ð¾ ÑÑÐ¾Ð²Ð½Ñ ÑÐ°ÑÑÐ¸ÑÐ½ÑÑ ÑÐ°Ð·ÑÑÐ´Ð¾Ð² Ð¸ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´Ð¸ÑÑ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ðµ Ð½Ð°Ð¿ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð±ÐµÐ· Ð½Ð°ÑÑÑÐµÐ½Ð¸Ñ Ð¾ÑÐ½Ð¾Ð²Ð½Ð¾Ð³Ð¾ ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð°Ð»Ð° Ð¸Ð·Ð¼ÐµÑÐ¸ÑÐµÐ»ÑÐ½Ð¾Ð³Ð¾ ÑÑÐ°Ð½ÑÑÐ¾ÑÐ¼Ð°ÑÐ¾ÑÐ°.
description: The study focused on the detection of partial discharges in transformers with solid insulation. A model simulating partial discharges in a high-voltage cylindrical capacitor was developed. Using this model, a sensor and partial discharge detector scheme were designed. This enabling the utilization of the measuring part of the high-voltage capacitor for analyzing the level of partial discharges. This scheme allows real-time monitoring of insulation condition based on partial discharge levels and voltage measurement without disrupting the primary functionality of the measuring transformer.
Two-photon exchange from intermediate state resonances in elastic electron-proton scattering
Creators: name: Ahmed, Jaseer
name: Blunden, P. G.
name: Melnitchouk, W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We use a recently developed dispersive approach to compute the two-photon exchange (TPE) correction to elastic electron-proton scattering, including contributions from hadronic $J^P=1/2^\pm$ and $3/2^\pm$ resonant intermediate states below~1.8~GeV. For the transition amplitudes from the proton ground state to the resonant excited states we employ new exclusive meson electroproduction data from CLAS at $Q^2 \lesssim 5$~GeV$^2$, and we explore the effects of both fixed and dynamic widths for the resonances. Among the resonant states, the $N(1520)~\!3/2^-$ becomes dominant for $Q^2 \gtrsim 2$~GeV$^2$, with a sign opposite to the comparably sized $Δ(1232)~\!3/2^+$ contribution, leading to an overall increase in the size of the TPE correction to the cross section relative to the nucleon only contribution at higher $Q^2$ values. The results are in good overall agreement with recent $e^+ p$ to $e^- p$ cross section ratio and polarization transfer measurements, and provide compelling evidence for a resolution of the electric to magnetic form factor ratio discrepancy.
description: 40 pages, 15 figures
Hartree-Fock and Many-Body Perturbation Theory with Correlated Realistic NN-Interactions
Creators: name: Roth, R.
name: Papakonstantinou, P.
name: Paar, N.
name: Hergert, H.
name: Neff, T.
name: Feldmeier, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We employ correlated realistic nucleon-nucleon interactions for the description of nuclear ground states throughout the nuclear chart within the Hartree-Fock approximation. The crucial short-range central and tensor correlations, which are induced by the realistic interaction and cannot be described by the Hartree-Fock many-body state itself, are included explicitly by a state-independent unitary transformation in the framework of the unitary correlation operator method (UCOM). Using the correlated realistic interaction V_UCOM resulting from the Argonne V18 potential, bound nuclei are obtained already on the Hartree-Fock level. However, the binding energies are smaller than the experimental values because long-range correlations have not been accounted for. Their inclusion by means of many-body perturbation theory leads to a remarkable agreement with experimental binding energies over the whole mass range from He-4 to Pb-208, even far off the valley of stability. The observed perturbative character of the residual long-range correlations and the apparently small net effect of three-body forces provides promising perspectives for a unified nuclear structure description.
description: 14 pages, 8 figures, 3 tables, using REVTEX4
Gas Content Regulates the Lifecycle of Star Formation and Black Hole Accretion in Galaxies
Creators: name: Yesuf, Hassen M.
name: Ho, Luis C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Active galactic nucleus (AGN) feedback is expected to impact the amount of cold gas in galaxies by driving strong galactic winds, by preventing external gas inflows, or by changing the thermodynamical state of the gas. We use molecular gas mass estimates based on dust absorption (H$α$/H$β$) to study gas content of large samples of type 2 AGN host galaxies in comparison with inactive galaxies. Using sparse principal component and clustering analysis, we analyze a suite of stellar and structural parameters of $\sim 27,100$ face-on, central galaxies at redshift $z = 0.02-0.15$ and with stellar mass $M_\star \approx 10^{10}-2\times 10^{11}\,M_\odot$. We identify four galaxy groups of similar mass and morphology (mass surface density, velocity dispersion, concentration, and Sérsic index) that can be evolutionarily linked through a lifecycle wherein gas content mediates their star formation rate (SFR) and level of AGN activity. Galaxies first consume their gas mostly through bursty star formation, then enter into a transition phase of intermediate gas richness in which star formation and AGNs coexist, before settling into retirement as gas-poor, quiescent systems with residual levels of AGN activity (LINERs). Strongly accreting black holes (Seyferts) live in gas-rich, star-forming hosts, but neither their gas reservoir nor their ability to form stars seem to be impacted \emph{instantaneously} (timescales $\lesssim 0.5$\,Gyr) by AGN feedback. Our results are inconsistent with AGN feedback models that predict that central, bulge-dominated, Seyfert-like AGNs in massive galaxies have significantly lower molecular gas fractions compared to inactive galaxies of similar mass, morphology, and SFR.
description: 19 pages, 8 figures, accepted for ApJ
EJMCM_Volume 8_Issue 3_Pages 671-679.pdf
Creators: name: BHAWANI MODI
Publisher: name: figshare
Year: 2021
Subjects: Anatomy

description: Introduction: Ultrasonographic determination of foetal size to estimate the gestational age is very important in the present day obstetric practice as a significant proportion of pregnant women are unsure of their last menstrual period. Aims & objectives: This study is an attempt to measure various parameters of the foetus for the prediction of gestational age in the IInd and IIIrd trimester of pregnancy by USG. Place and Duration of Study: FH Medical College with effect from Aug 2015- March 2017. Materials and methods: This is an observational study. Healthy pregnant ladies with a single live foetus were selected for the study. 328 cases were selected and they were examined for BPD, HC, AC, FL by a single observer on a single machine. Results: All parameters were measured in 328 pregnant females from 18 years to 35 years age for BPD, HC, AC, FL. A significant positive correlation was observed between the gestational age and all the parameters.
Soil processing images and tests for peak compressive strength from Moisture alone is sufficient to impart strength but not weathering resistance to termite mound soil
Creators: name: Zachariah, Nikita
name: Tejas G. Murthy
name: Borges, Renee M.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Biological Engineering

description: Soil processing images and tests for peak compressive strength
Finite-frequency spin susceptibility and spin pumping in superconductors with spin-orbit relaxation
Creators: name: Silaev, M. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Static spin susceptibility of superconductors with spin-orbit relaxation has been calculated in the seminal work of A.A. Abrikosov and L.P. Gor'kov [Sov. Phys. JETP, {\bf 15}, 752 (1962)]. Surprisingly the generalization of this result to finite frequencies has not been done despite being quite important for the modern topic of superconducting spintronics. The present paper fills this gap by deriving the analytical expression for spin susceptibility. The time-dependent spin response is shown to be captured by the quasiclassical Eilenberger equation with collision integrals corresponding to the ordinary and spin-orbit scattering. Using the developed formalism we study the linear spin pumping effect between the ferromagnet and the adjacent superconducting film. The consequences for understanding recent experiments demonstrating the modification of Gilbert damping by the superconducting correlations are discussed.
JDoonan_figure S2_ESM.pdf from Host–microbiota–insect interactions drive emergent virulence in a complex tree disease
Creators: name: Doonan, James M.
name: Broberg, Martin
name: Denman, Sandra
name: McDonald, James E.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Science

description: Gel electrophoresis image of extracted RNA
A comparative analysis of knowledge acquisition performance in complex networks
Creators: name: Guerreiro, Lucas
name: Silva, Filipi N.
name: Amancio, Diego R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Discovery processes have been an important topic in the network science field. The exploration of nodes can be understood as the knowledge acquisition process taking place in the network, where nodes represent concepts and edges are the semantical relationships between concepts. While some studies have analyzed the performance of the knowledge acquisition process in particular network topologies, here we performed a systematic performance analysis in well-known dynamics and topologies. Several interesting results have been found. Overall, all learning curves displayed the same learning shape, with different speed rates. We also found ambiguities in the feature space describing the learning curves, meaning that the same knowledge acquisition curve can be generated in different combinations of network topology and dynamics. A surprising example of such patterns are the learning curves obtained from random and Waxman networks: despite the very distinct characteristics in terms of global structure, several curves from different models turned out to be similar. All in all, our results suggest that different learning strategies can lead to the same learning performance. From the network reconstruction point of view, however, this means that learning curves of observed sequences should be combined with other sequence features if one aims at inferring network topology from observed sequences.
The Stellar Populations of M31 Halo Substructure
Creators: name: Ferguson, Annette
name: Johnson, Rachel
name: Faria, Daniel
name: Irwin, Mike
name: Ibata, Rodrigo
name: Johnston, Kathryn
name: Lewis, Geraint
name: Tanvir, Nial
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first results from our survey of stellar substructure in the outskirts of M31 using the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope. We discuss the stellar populations associated with five prominent stellar overdensities discovered during the course of our panoramic ground-based imaging survey with the Isaac Newton Telescope Wide-Field Camera (INT WFC); a sixth pointing targets a region of `clean' halo. The colour-magnitude diagrams (CMDs), which contain between ~10,000--90,000 stars and reach four magnitudes below the horizontal branch, reveal clear variations in morphology between most fields, indicating that the age and/or metallicity mix of stars is not constant at large radius. This directly confirms the existence of large-scale population inhomogeneities within the halo of M31 and lends further support to the notion that M31 has formed, at least in part, through satellite accretions. We find a striking similarity between the populations of the giant stellar stream and those of another overdensity, the NE shelf, which lies north-east of the galaxy center. If these overdensities are associated with the same population, then the difference in their red clump magnitudes implies the NE shelf lies in front of the stream by several tens of kpc, in good agreement with recent orbit calculations for the stream progenitor.
description: 5 pages, 3 figurs, ApJL accepted
Quasi-homologous evolution of self-gravitating systems with vanishing complexity factor
Creators: name: Herrera, L.
name: Di Prisco, A.
name: Ospino, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the evolution of self-gravitating either dissipative or non--dissipative systems satisfying the condition of minimal complexity, and whose areal radius velocity is proportional to the areal radius (quasi-homologous condition). Several exact analytical models are found under the above mentioned conditions. Some of the presented models describe the evolution of spherically symmetric dissipative fluid distributions whose center is surrounded by a cavity. Some of them satisfy the Darmois conditions whereas others present shells and must satisfy the Israel condition on either one or both boundary surfaces. Prospective applications of some of these models to astrophysical scenarios are discussed.
description: 15 pages Latex. Published in Eur. Phys.J. C
Optimizing Downlink Resource Allocation in Multiuser MIMO Networks via Fractional Programming and the Hungarian Algorithm
Creators: name: Khan, Ahmad Ali
name: Adve, Raviraj
name: Yu, Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Optimizing the sum-log-utility for the downlink of multi-frequency band, multiuser, multiantenna networks requires joint solutions to the associated beamforming and user scheduling problems through the use of cloud radio access network (CRAN) architecture; optimizing such a network is, however, non-convex and NP-hard. In this paper, we present a novel iterative beamforming and scheduling strategy based on fractional programming and the Hungarian algorithm. The beamforming strategy allows us to iteratively maximize the chosen objective function in a fashion similar to block coordinate ascent. Furthermore, based on the crucial insight that, in the downlink, the interference pattern remains fixed for a given set of beamforming weights, we use the Hungarian algorithm as an efficient approach to optimally schedule users for the given set of beamforming weights. Specifically, this approach allows us to select the best subset of users (amongst the larger set of all available users). Our simulation results show that, in terms of average sum-log-utility, as well as sum-rate, the proposed scheme substantially outperforms both the state-of-the-art multicell weighted minimum mean-squared error (WMMSE) and greedy proportionally fair WMMSE schemes, as well as standard interior-point and sequential quadratic solvers. Importantly, our proposed scheme is also far more computationally efficient than the multicell WMMSE scheme.
description: Accepted for publication in IEEE Transactions on Wireless Communications (2020)
Superconductivity in Li3Ca2C6 intercalated graphite
Creators: name: Emery, Nicolas
name: Herold, Claire
name: Mareche, Jean-Francois
name: Bellouard, Christine
name: Loupias, Genevieve
name: Lagrange, Philippe
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this letter, we report the discovery of superconductivity in Li3Ca2C6. Several graphite intercalation compounds (GICs) with electron donors, are well known as superconductors. It is probably not astonishing, since it is generally admitted that low dimensionality promotes high superconducting transition temperatures. Superconductivity is lacking in pristine graphite, but after charging the graphene planes by intercalation, its electronic properties change considerably and superconducting behaviour can appear. Li3Ca2C6 is a ternary GIC, for which the intercalated sheets are very thick and poly-layered (five lithium layers and two calcium ones). It contains a great amount of metal (five metallic atoms for six carbon ones). Its critical temperature of 11.15 K is very close to that of CaC6 GIC (11.5 K). Both CaC6 and Li3Ca2C6 GICs possess currently the highest transition temperatures among all the GICs.
description: 5 pages, 3 figures
Wipszycka, Ewa: Études sur le christianisme dans l'Égypte de l'Antiquité tardive, Roma 1996
Creators: name: Kohlbacher, Michael
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 81 (1997): Oriens christianus, Band 81
Computational aspects of Escher tilings
Creators: name: Gethner, Ellen
Publisher: name: University of British Columbia
Year: 2009

description: At the heart of the ideas of the work of Dutch graphic artist M.C. Escher is the idea of automation. We consider one such problem that was inspired by some of his earlier and lesser known work [MWS96, Sc90, Sc97, Er76, Es86]. From a finite set of (possibly overlapping) connected regions within a unit square (Figure 1), is it possible to make a prototile with concatenated and colored copies of the original square tile (Figure 2), such that the pattern in the plane arising from tiling with the prototile • uniformly colors connected components, and • distinctly colors overlapping components (Figure 3)? The answer is yes, that such a prototile exists for any (suitably defined) design confined to a unit square. We present a proof of existence and an efficient (and implementable) algorithm to construct prototiles. Moreover, in the existence proof, it will become apparent that a prototile for a given design may not be unique (up to concatenation). In such a situation, there are infinitely many "measurably different" prototiles. The secret of each design is encoded by either one or infinitely many (number theoretic) lattices; we will show how to extract all possible lattices by using techniques from graph theory and graph algorithms. Finally, from a certain point of view, the prototiles that we construct are canonical. We begin an analysis of the canonical prototiles by making a connection from lattices to binary quadratic forms to class number.
Auroral kilometric radiation and electron pairing
Creators: name: Treumann, R. A.
name: Baumjohann, Wolfgang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Space Physics (physics.space-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We suggest that pairing of bouncing medium-energy electrons in the auroral upward current region close to the mirror points may play a role in driving the electron cyclotron maser instability to generate an escaping narrow band fine structure in the auroral kilometric radiation. We treat this mechanism in the gyrotron approximation, for simplicity using the extreme case of a weakly relativistic Dirac distribution instead the more realistic anisotropic Jüttner distribution. Promising estimates of bandwidth, frequency drift and spatial location are given.
description: 11 pages, 2 figures
Gamma-Ray Burst Sequences in Hardness Ratio-Peak Energy Plane
Creators: name: Cui, X. H.
name: Liang, E. W.
name: Lu, R. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The narrowness of the distribution of the peak energy of $νF_ν$ spectrum of gamma-ray bursts (GRBs) and the unification of GRB population are great puzzles yet to be solved. We investigate the two puzzles based on the global spectral behaviors of different GRB population in the $HR-E_{\rm{p}}$ plane (HR the spectral hardness ratio) with BATSE and HETE-2 observations. It is found that long GRBs and XRFs observed by HETE-2 seem to follow the same sequence in the $HR-E_{\rm{p}}$ plane, with the XRFs at the low end of this sequence. The long and short GRBs observed by BATSE follow significantly different sequences in the $HR-E_{\rm p}$ plane, with most of the short GRBs having a larger hardness ratio than the long GRBs at a given $E_{\rm{p}}$. These results indicate that the global spectral behaviors of the long GRB sample and the XRF sample are similar, while that of short GRBs is different. The short GRBs seem to be a unique subclass of GRBs, and they are not the higher energy extension of the long GRBs (abridged).
description: 9 pages, 3 figures
Role of silicon and carbon on the structural and electrochemical properties of Si-Ni$_{3.4}$Sn$_4$-Al-C anodes for Li-ion batteries
Creators: name: Azib, Tahar
name: Thaury, Claire
name: Fariaut-Georges, Cécile
name: Hézèque, Thierry
name: Cuevas, Fermin
name: Jordy, Christian
name: Latroche, Michel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Varying the amounts of silicon and carbon, different composites have been prepared by ball milling of Si, Ni$_{3.4}$Sn$_4$, Al and C. Silicon and carbon contents are varied from 10 to 30 wt.% Si, and 0 to 20 wt.% C. The microstructural and electrochemical properties of the composites have been investigated by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and electrochemical galvanostatic cycling up to 1000 cycles. Impact of silicon and carbon contents on the phase occurrence, electrochemical capacity and cycle-life are compared and discussed. For C-content comprised between 9 and 13 wt.% and Si-content >= 20 wt.%, Si nanoparticles are embedded in a Ni$_{3.4}$Sn$_4$-Al-C matrix which is chemically homogeneous at the micrometric scale. For other carbon contents and low Si-amount (10 wt.%), no homogeneous matrix is formed around Si nanoparticles. When homogenous matrix is formed, both Ni$_3$Sn$_4$ and Si participate to the reversible lithiation mechanism, whereas no reaction between Ni$_3$Sn$_4$ and Li is observed for no homogenous matrix. Moreover, best cycle-life performances are obtained when Si nanoparticles are embedded in a homogenous matrix and Si-content is moderate (<= 20 wt.%). Composites with carbon in the 9-13 wt.% range and 20 wt.% silicon lead to the best balance between capacity and life duration upon cycling. This work experimentally demonstrates that embedding Si in an intermetallic/carbon matrix allows to efficiently accommodate Si volume changes on cycling to ensure long cycle-life.
Magnetically Tunable Kondo - Aharonov-Bohm Effect in a Triangular Quantum Dot
Creators: name: Kuzmenko, T.
name: Kikoin, K.
name: Avishai, Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The role of discrete orbital symmetry in mesoscopic physics is manifested in a system consisting of three identical quantum dots forming an equilateral triangle. Under a perpendicular magnetic field, this system demonstrates a unique combination of Kondo and Aharonov-Bohm features due to an interplay between continuous [spin-rotation SU(2)] and discrete (permutation C3v) symmetries, as well as U(1) gauge invariance. The conductance as a function of magnetic flux displays sharp enhancement or complete suppression depending on contact setups.
description: 4 pages, 3 .eps figures