cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Invariant Deep Compressible Covariance Pooling for Aerial Scene Categorization
Creators: name: Wang, Shidong
name: Ren, Yi
name: Parr, Gerard
name: Guan, Yu
name: Shao, Ling
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Learning discriminative and invariant feature representation is the key to visual image categorization. In this article, we propose a novel invariant deep compressible covariance pooling (IDCCP) to solve nuisance variations in aerial scene categorization. We consider transforming the input image according to a finite transformation group that consists of multiple confounding orthogonal matrices, such as the D4 group. Then, we adopt a Siamese-style network to transfer the group structure to the representation space, where we can derive a trivial representation that is invariant under the group action. The linear classifier trained with trivial representation will also be possessed with invariance. To further improve the discriminative power of representation, we extend the representation to the tensor space while imposing orthogonal constraints on the transformation matrix to effectively reduce feature dimensions. We conduct extensive experiments on the publicly released aerial scene image data sets and demonstrate the superiority of this method compared with state-of-the-art methods. In particular, with using ResNet architecture, our IDCCP model can reduce the dimension of the tensor representation by about 98% without sacrificing accuracy (i.e., <0.5%).
description: This article has been accepted for inclusion in a future issue of IEEE Transactions on Geoscience and Remote Sensing. Content is final as presented, with the exception of pagination
Recordings of child language and child-caregiver interaction with Child 12, a female child aged 6 years, 5 months, 29 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of task-oriented child-caregiver interaction (researcher present). Audio and video recordings of free play between child and caregiver (researcher not present). Text file describing contents of recordings.

This is the same child as Child 26 in the materials collected in 2019 (Bundle 2018-19.064).
Modeling Mito-nuclear Compatibility and its Role in Species Identification
Creators: name: Princepe, Debora
name: de Aguiar, Marcus A. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Mitochondrial genetic material is widely used for phylogenetic reconstruction and as a barcode for species identification. Here we study how mito-nuclear interactions affect the accuracy of species identification by mtDNA, as well as the speciation process itself. We simulate the evolution of a population of individuals who carry a recombining nuclear genome and a mitochondrial genome inherited maternally. We compare a null model fitness landscape that lacks any mito-nuclear interaction against a scenario in which interactions influence fitness. Fitness is assigned to individuals according to their mito-nuclear compatibility, which drives the coevolution of the nuclear and mitochondrial genomes. When the population breaks into distinct species we analyze the accuracy of mtDNA barcode for species identification. Remarkably, we find that species identification by mtDNA is equally accurate in the presence or absence of mito-nuclear coupling and that the success of the DNA barcode derives mainly from population geographical isolation during speciation. Nevertheless, selection imposed by mito-nuclear compatibility influences the diversification process and leaves signatures in the genetic content and spatial distribution of the populations, in three ways: phylogenetic trees are more balanced; clades correlate strongly with the spatial distribution and; there is a substantial increase in the intraspecies mtDNA similarity. We compare the evolutionary patterns observed in our model to empirical data from copepods (\textit{T. californicus}). We find good qualitative agreement in the geographic patterns and the topology of the phylogenetic tree, provided the model includes selection based on mito-nuclear interactions. These results highlight the role of mito-nuclear compatibility in the speciation process and its reconstruction from genetic data.
description: 27 pages, 6 figures
Dilemmas of survival in Russia’s residual opposition parties: the cases of Yabloko and the CPRF, 2001-2022
Creators: name: McCallum, Alasdair Harry
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 440803
subject: Comparative government and politics
classificationCode: 440808
subject: International relations
classificationCode: 440811
subject: Political theory and political philosophy
classificationCode: 440899
subject: Political science not elsewhere classified

description: This thesis studies the most impactful Russian opposition parties from the period 2001 to 2022, Yabloko and the CPRF, and arrives at surprising findings about the longevity and resilience of opposition practice even in the most adverse circumstances.
High Contrast L' Band Adaptive Optics Imaging to Detect Extrasolar Planets
Creators: name: Heinze, Ari
name: Hinz, Phil
name: Sivanandam, Suresh
name: Apai, Daniel
name: Meyer, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We are carrying out a survey to search for giant extrasolar planets around nearby, moderate-age stars in the mid-infrared L' and M bands (3.8 and 4.8 microns, respectively), using the Clio camera with the adaptive optics system on the MMT telescope. To date we have observed 7 stars, of a total 50 planned, including GJ 450 (distance about 8.55pc, age about 1 billion years, no real companions detected), which we use as our example here. We report the methods we use to obtain extremely high contrast imaging in L', and the performance we have obtained. We find that the rotation of a celestial object over time with respect to a telescope tracking it with an altazimuth mount can be a powerful tool for subtracting telescope-related stellar halo artifacts and detecting planets near bright stars. We have carried out a thorough Monte Carlo simulation demonstrating our ability to detect planets as small as 6 Jupiter masses around GJ 450. The division of a science data set into two independent parts, with companions required to be detected on both in order to be recognized as real, played a crucial role in detecting companions in this simulation. We mention also our discovery of a previously unknown faint stellar companion to another of our survey targets, HD 133002. Followup is needed to confirm this as a physical companion, and to determine its physical properties.
description: 8 pages, 4 figures
Interacting Tsallis agegraphic dark energy in DGP Braneworld Cosmology
Creators: name: Mangoudehi, Z. Feizi
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The purpose of this paper is to study the Tsallis agegraphic dark energy with an interaction term between dark energy and dark matter in the DGP brane-world scenario. For this, we assume some initial conditions to obtain the dark energy density, deceleration, dark energy EoS, and total EoS parameters. Then, we analyze the statefinder parameters, $ω'{}_{DE}-ω_{DE}$ plots, and classical stability features of the model. The results state that the deceleration parameter provides the phase transition from decelerated to accelerated phase. The $ω_{DE}$ graphs show the phantom behavior, while the $ω_{tot}$ exhibits the quintessence and phantom during the evolution of the Universe. Following the graphs, the Statefinder analysis shows the quintessence behavior of the model for the past and present. However, it tends to the $ΛCDM$ in the following era. The $ω'{}_{DE}-ω_{DE}$ plot indicates the thawing or freezing area depending on the type of era and different values of $b^{2}$, $δ$, and $m$. By the square of the sound speed, we see the model is stable in the past, stable or unstable at the current time, and unstable in the future for selected values of $b^{2}$, $δ$, and $m$. To test the model, we use the recent Hubble data. We also employ Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC) to compare the model with the $ΛCDM$ as the reference model. In addition, we test the model using the $H-z$ plot, and we see a turning point in the future time. The results from the best fit values for the $ω_{tot}$ plot emphasize that the Universe is in the quintessence region in the current time. It will enter the phantom phase, and then it will approach the $Λ$ state in the future. But, the $ω_{DE}$ always stays on the phantom region. The model is unstable in the present and progressive era.
description: 32 pager, 15 figures accepted in Astrophysics and Space Science
Analytical phase optical transfer function for Gaussian illumination and the optimized profiles
Creators: name: Huang, Jianhui
name: Bao, Yijun
name: Gaylord, Thomas K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Image and Video Processing (eess.IV)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The imaging performance of tomographic deconvolution phase microscopy can be described in terms of the phase optical transfer function (POTF) which, in turn, depends on the illumination profile. To facilitate the optimization of the illumination profile, an analytical calculation method based on polynomial fitting is developed to describe the POTF for general non-uniform axially-symmetric illumination. This is then applied to Gaussian and related profiles. Compared to numerical integration methods that integrate over a series of annuli, the present analytical method is much faster and is equally accurate. Further, a balanced distribution criterion for the POTF and a least-squares minimization are presented to optimize the uniformity of the POTF. An optimum general profile is found analytically by relaxed optimal search and an optimum Gaussian profile is found through a tree search. Numerical simulations confirm the performance of these optimum profiles and support the balanced distribution criterion introduced.
description: 6 figures
Laplacian eigenvalues functionals and metric deformations on compact manifolds
Creators: name: Soufi, Ahmad El
name: Ilias, Said
Publisher: name: arXiv
Year: 2007
Subjects: subject: Metric Geometry (math.MG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 49R50, 35P99, 58J50

description: In this paper, we investigate critical points of the Laplacian's eigenvalues considered as functionals on the space of Riemmannian metrics or a conformal class of metrics on a compact manifold. We obtain necessary and sufficient conditions for a metric to be a critical point of such a functional. We derive specific consequences concerning possible locally maximizing metrics. We also characterize critical metrics of the ratio of two consecutive eigenvalues.
Scaling Behavior of Entanglement in Two- and Three-Dimensional Free Fermions
Creators: name: Li, Weifei
name: Ding, Letian
name: Yu, Rong
name: Roscilde, Tommaso
name: Haas, Stephan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Exactly solving a spinless fermionic system in two and three dimensions, we investigate the scaling behavior of the block entropy in critical and non-critical phases. The scaling of the block entropy crucially depends on the nature of the excitation spectrum of the system and on the topology of the Fermi surface. Noticeably, in the critical phases the scaling violates the area law and acquires a logarithmic correction \emph{only} when a well defined Fermi surface exists in the system. When the area law is violated, we accurately verify a conjecture for the prefactor of the logarithmic correction, proposed by D. Gioev and I. Klich [quant-ph/0504151].
description: 4 pages, 4 figures
The human side of development : a study of migration, housing, and community satisfaction in Pudong New Area, People’s Republic of China
Creators: name: Halliday, Deborah Louise
Publisher: name: University of British Columbia
Year: 2009

description: Since announcing its 'open door policy' in the late 1970s and shifting towards a 'socialist market economy' in recent years, the People's Republic of China has been experiencing vast economic, social and demographic changes. China's high economic growth rate is spurring migration to the cities as people search for higher standards of living and increased income. This is compounded by relaxed household registration laws enabling people to move to urban centers in greater numbers, resulting in profound effects upon the rate and level of urbanization. This in turn is adding pressure on China's existing housing shortage, increasing the state's heavy financial burden and the furthering the need for housing reform Pudong New Area, or East Shanghai, is a district that has been slated for vast economic and industrial development, and its growth is being affected by the changes outlined above. Pudong is now the site of booming construction of many types, including basic infrastructure, housing and factories, and has quickly become home to over one million people. This study thus seeks to understand the processes by which people have come to Pudong, the ways and means by which they have been provided with basic housing and their satisfaction levels with their current housing situations and communities. The links between these three aspects of Pudong's development are also examined, shedding light on the relationship between the government and people in terms of the growth of Pudong New Area. Two Sino-Foreign Joint Ventures were used to gather data for this study: both surveys and interviews were conducted with employees. It was found that Pudong's future success rests on three things: population control, return on housing investment and the satisfaction levels of the residents of Pudong.
Asymmetric Twin Representation: the Transfer Matrix Symmetry
Creators: name: Doikou, Anastasia
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The symmetry of the Hamiltonian describing the asymmetric twin model was partially studied in earlier works, and our aim here is to generalize these results for the open transfer matrix. In this spirit we first prove, that the so called boundary quantum algebra provides a symmetry for any generic -- independent of the choice of model -- open transfer matrix with a trivial left boundary. In addition it is shown that the boundary quantum algebra is the centralizer of the $B$ type Hecke algebra. We then focus on the asymmetric twin representation of the boundary Temperley-Lieb algebra. More precisely, by exploiting exchange relations dictated by the reflection equation we show that the transfer matrix with trivial boundary conditions enjoys the recognized ${\cal U}_{q}(sl_2) \otimes {\cal U}_{\mathrm i}(sl_2)$ symmetry. When a non-diagonal boundary is implemented the symmetry as expected is reduced, however again certain familiar boundary non-local charges turn out to commute with the corresponding transfer matrix.
description: This is a contribution to the Vadim Kuznetsov Memorial Issue on Integrable Systems and Related Topics, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Application of Remote Sensing and Participatory Soil Erosion Assessment Approach for Soil Erosion Mapping in a Watershed
Creators: name: Krishna Prasad BHANDARI, Rotchanatch DARNSAWASDI
Publisher: name: Walailak University
Year: 2015
Subjects: Participatory geographic information system (PGIS), revised universal soil loss equation (RUSLE), erosion damaged assessment (EDA), soil erosion, land use and land cover (LULC)

description: 8, 12, Walailak Journal of Science and Technology
Elliptic $q,t$ matrix models
Creators: name: Mironov, A.
name: Morozov, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Gaussian matrix model is known to deform to the $q,t$-matrix model. We consider further deformation to the elliptic $q,t$ matrix model by properly deforming the Gaussian density as well as the Vandermonde factor. Properties of an associated basis of symmetric functions that provide the matrix model property $\sim {\rm char}$ in the deformed elliptic case are discussed.
description: 7 pages
Recordings of child language and child-caregiver interaction with Child 10, a male child aged 6 years, 10 months, 24 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of task-oriented child-caregiver interaction (researcher present). Audio and video recordings of free play between child and caregiver (researcher not present). Text file describing contents of recordings.

This is the same child as Child 18 in the materials collected in 2019 (Bundle 2018-19.056).
A Comparison between Solving of Two-Dimensional Nonlinear Fredholm Integral Equations of the Second Kind by the Optimal Homotopy Asymptotic Method and Homotopy Perturbation Method
Creators: name: Mohammad ALMOUSA, Ahmad ISMAIL
Publisher: name: Walailak University
Year: 2015
Subjects: Optimal homotopy asymptotic method, homotopy perturbation method, 2-dimensional nonlinear Fredholm integral equations of the second kind

description: 11, 12, Walailak Journal of Science and Technology
New results about the canonical transformation for boson operators
Creators: name: Raduta, C. M.
name: Raduta, A. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Bogoliubov transformation for a monopole boson induces an unitary transformation connecting the Fock spaces of initial and correlated boson-s. Here we provide a very simple method for deriving the analytical expression for the overlap matrix of the basis states generating the two boson spaces.
description: 3 pages
MPEC 2024-T181 : COMET P/2024 T1 (Rankin)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: COMET P/2024 T1 (Rankin)

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Two-body continuum states in non-integer geometry
Creators: name: Christensen, Esben Rohan
name: Garrido, Eduardo
name: Jensen, Aksel Stenholm
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Wave functions, phase shifts and corresponding elastic cross sections are investigated for two short-range interacting particles in a deformed external oscillator field. For this we use the equivalent $d$-method employing a non-integer dimension $d$. Using a square-well potential, we derive analytic expressions for scattering lengths and phase shifts. In particular, we consider the dimension, $d_E$, for infinite scattering length, where the Efimov effect occurs by addition of a third particle. We give explicitly the equivalent continuum wave functions in $d$ and ordinary three dimensional (3D) space, and show that the phase shifts are the same in both methods. Consequently the $d$-method can be used to obtain low-energy two-body elastic cross sections in an external field.
description: 12 pages, 8 figures. Submitted to PRA for publication
On Classical Quasi-Primary Radical of Submodules and Classical Quasi-Primary Radical Formula of Submodules
Creators: name: Pairote YIARAYONG, Phakakorn PANPHO
Publisher: name: Walailak University
Year: 2015
Subjects: Classical quasi-primary submodule, classical quasi-primary radical of submodule, classical quasi-primary radical formula of submodule

description: 11, 12, Walailak Journal of Science and Technology
New Algorithms for Numerical Assessment of Nonlinear Integro-Differential Equations of Second-Order using Haar Wavelets
Creators: name: Imran AZIZ, Siraj Ul ISLAM
Publisher: name: Walailak University
Year: 2015
Subjects: Haar wavelet, collocation method, second-order Fredholm integro-differential equation of second kind, second-order Volterra integro-differential equations of second kind

description: 11, 12, Walailak Journal of Science and Technology
Piezoelectric-driven uniaxial pressure cell for muon spin relaxation and neutron scattering experiments
Creators: name: Ghosh, Shreenanda
name: Brückner, Felix
name: Nikitin, Artem
name: Grinenko, Vadim
name: Elender, Matthias
name: Mackenzie, Andrew P.
name: Luetkens, Hubertus
name: Klauss, Hans-Henning
name: Hicks, Clifford W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We present a piezoelectric-driven uniaxial pressure cell that is optimized for muon spin relaxation and neutron scattering experiments, and that is operable over a wide temperature range including cryogenic temperatures. To accommodate the large samples required for these measurement techniques, the cell is designed to generate forces up to 1000 N, and to minimize the background signal the space around the sample is kept as open as possible. We demonstrate here that by mounting plate-like samples with epoxy, a uniaxial stress exceeding 1 GPa can be achieved in an active volume of 5 mm3. We show that for practical operation it is important to monitor both the force and displacement applied to the sample. Also, because time is critical during facility experiments, samples are mounted in detachable holders that can be rapidly exchanged. The piezoelectric actuators are likewise contained in an exchangeable cartridge.
description: Review of Scientific Instruments accepted for publication Oct 2020, 9 pages, 8 figures
Recordings of child language and child-caregiver interaction with Child 7, a male child aged 6 years, 5 months, 2 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of task-oriented child-caregiver interaction (researcher present). Audio and video recordings of free play between child and caregiver (researcher not present). Text file describing contents of recordings.

This is the same child as Child 3 in the materials collected in 2019 (Bundle 2018-19.041).
Validity of the Miller assessment for preschoolers in predicting later cognitive performance in children prenatally exposed to drugs
Creators: name: Fulks, Mary-Ann Lesley
Publisher: name: University of British Columbia
Year: 2009

description: This study investigated the validity of the Miller Assessment for Preschoolers (MAP) in predicting later cognitive outcome in children with prenatal drug exposure, using the Wechsler Preschool and Primary Scale of Intelligence-Revised (WPPSI-R), the Test of Early Reading Ability (TERA-2), the Peabody Picture Vocabulary Test-Revised (PPVT-R), and the Developmental Test of Visual-Motor Integration (VMI) as the outcome measures. Criticisms of previous studies of the predictive validity of the MAP included the predominant use of correlational and t-test analysis rather than clinical epidemiological techniques, and the questionability of the predictive accuracy of the MAP's recommended 5th and 25th percentile cutpoints without investigation of the full possible range of cutpoints. The primary purpose of this study was, therefore, to investigate the predictive validity of the MAP over a range of cutpoints, using clinical epidemiological techniques. The secondary purpose of the study was to compare the subjects' test performance to each test's norms to investigate how this sample of children with prenatal drug exposure performed in comparison to each test's normative sample. The subjects were 37 children with prenatal drug exposure who were 35 - 49 months old at the time of administration of the predictor measure, and 47 - 68 months old at the time of administration of the outcome measures. The MAP demonstrated the highest level of predictive accuracy when the WPPSI-R was used as the outcome measure, suggesting it was the most successful in identifying later intelligence in this sample of children with prenatal drug exposure. It was less successful at predicting later outcomes for more specific cognitive areas such as early reading behavior, receptive vocabulary and visual-motor integration, as assessed by the other three outcome measures. The 14th percentile MAP cutpoint was found to demonstrate higher overall levels of predictive accuracy than the test's recommended 5th and 25th percentile cutpoints. Compared to each test's norms, this sample of children approximated the normal distribution on the WPPSI-R and PPVT-R, but performed closer to the low average range on the MAP, TERA-2 and VMI.
Rational points on compactifications of semi-simple algebraic groups
Creators: name: Shalika, Joseph A.
name: Takloo-Bighash, Ramin
name: Tschinkel, Yuri
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove Manin's conjecture concerning the distribution of rational points of bounded height, and its refinement by Peyre, for wonderful compactifications of semi-simple algebraic groups over number fields. The proof proceeds via the study of the associated height zeta function and its spectral expansion.
On the possibility of breaking the heterodyne detection quantum noise limit with cross-correlation
Creators: name: Michael, E. A.
name: Besser, F. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The cross-correlation sensitivity of two identical balanced photodiode heterodyne receivers is characterized. Both balanced photodiodes receive the same weak signal split up equally, a situation equivalent to an astronomical spatial interferometer. A common local oscillator (LO) is also split up equally and its phase difference between both receivers is stabilized. We show by semi-classical photon deletion theory that the post-detection laser shot noise contributions on both receivers must be completely uncorrelated in this case of passing three power splitters. We measured the auto- and cross-correlation outputs as a function of weak signal power (system noise temperature measurement), and obtain a cross-correlation system noise temperature up to 20 times lower than for the auto-correlation system noise temperature of each receiver separately. This is supported by Allan plot measurements showing cross-correlation standard deviations 30 times lower than in auto-correlation. Careful calibration of the source power shows that the auto-correlation (regular) noise temperature of the single balanced receivers is already very near to the quantum limit as expected, which suggests a cross-correlation system noise temperature below the quantum limit. If validated further, this experimentally clear finding will not only be relevant for astronomical instrumentation but also for other fields like telecommunications and medical imaging.
Positive geometry, local triangulations, and the dual of the Amplituhedron
Creators: name: Herrmann, Enrico
name: Langer, Cameron
name: Trnka, Jaroslav
name: Zheng, Minshan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We initiate the systematic study of \emph{local positive spaces} which arise in the context of the Amplituhedron construction for scattering amplitudes in planar maximally supersymmetric Yang-Mills theory. We show that all local positive spaces relevant for one-loop MHV amplitudes are characterized by certain sign-flip conditions and are associated with surprisingly simple logarithmic forms. In the maximal sign-flip case they are finite one-loop octagons. Particular combinations of sign-flip spaces can be glued into new local positive geometries. These correspond to local pentagon integrands that appear in the local expansion of the MHV one-loop amplitude. We show that, geometrically, these pentagons do \emph{not} triangulate the original Amplituhedron space but rather its twin "Amplituhedron-Prime." This new geometry has the same boundary structure as the Amplituhedron (and therefore the same logarithmic form) but differs in the bulk as a geometric space. On certain two-dimensional boundaries, where the Amplituhedron geometry reduces to a polygon, we check that both spaces map to the same dual polygon. Interestingly, we find that the pentagons internally triangulate that dual space. This gives a direct evidence that the chiral pentagons are natural building blocks for a yet-to-be discovered dual Amplituhedron.
description: 117 pages, many figures
MPEC 2025-G68 : 2025 GN
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 GN

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
The temporal development of strategy in small family firms: Empirical evidence from Italy
Creators: name: Bogarelli, Paolo
Publisher: name: Economia Aziendale Online -
Year: 2023
Subjects: strategy, longitudinal research setting, case study, key performance indicators, small family firms, franciacorta wine

description: While strategy development in large firms has been studied since the 1990s, very little research has examined how strategy is formed and implemented in small family firms without formal business planning systems. To address the paucity of research and the consequent difficulty in identifying the characteristics of strategy development in the context of small family firms, this study proposes a longitudinal analysis framework to examine the temporal development of strategy in small family firms. Furthermore, through an in-depth longitudinal case study of a small Italian family firm in the wine sector, we verify whether the proposed framework allows fully understanding the strategy implemented over time and how it emerged dynamically in the absence of any formal business planning. To gain a richer understanding of how strategic processes unfold in small family firms, the strategic goals pursued, and whether and how these were achieved, this study reconstructs the impact of the progressive implementation of the strategy on the firm’s operational and financial performance, as well as the business model changes introduced over time.
description: Economia Aziendale Online -, Vol 14, No 4 (2023): ISSUE 4/2023
Ising universality in the two-dimensional Blume-Capel model with quenched random crystal field
Creators: name: Vatansever, Erol
name: Vatansever, Zeynep Demir
name: Theodorakis, Panagiotis E.
name: Fytas, Nikolaos G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Using high-precision Monte-Carlo simulations based on a parallel version of the Wang-Landau algorithm and finite-size scaling techniques we study the effect of quenched disorder in the crystal-field coupling of the Blume-Capel model on the square lattice. We mainly focus on the part of the phase diagram where the pure model undergoes a continuous transition, known to fall into the universality class of the pure Ising ferromagnet. A dedicated scaling analysis reveals concrete evidence in favor of the strong universality hypothesis with the presence of additional logarithmic corrections in the scaling of the specific heat. Our results are in agreement with an early real-space renormalization-group study of the model as well as a very recent numerical work where quenched randomness was introduced in the energy exchange coupling. Finally, by properly fine tuning the control parameters of the randomness distribution we also qualitatively investigate the part of the phase diagram where the pure model undergoes a first-order phase transition. For this region, preliminary evidence indicate a smoothening of the transition to second-order with the presence of strong scaling corrections.
description: 11 pages, 13 figures, minor correction to references appearing in Fig. 1, to be published in Phys. Rev. E
Voltage and Temperature Dependence of High-Field Magnetoresistance in Arrays of Magnetic Nanoparticles
Creators: name: Tan, Reasmey P.
name: Carrey, Julian
name: Respaud, Marc
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Huge values of high field magnetoresistance have been recently reported in large arrays of CoFe nanoparticles embedded in an organic insulating lattice in the Coulomb blockade regime. An unusual exponential decrease of magnetoresistance with increasing voltage was observed, as well as a characteristic scaling of the magnetoresistance amplitude versus the field-temperature ratio. We propose a model which takes into account the influence of paramagnetic impurities on the transport properties of the system to describe these features. It is assumed that the non-colinearity between the core spins inside the nanoparticles and the paramagnetic impurities can be modelled by an effective tunnel barrier, the height of which depends on the relative angle between the magnetization of both kind of spins. The influence on the magnetotransport properties of the height and the thickness of the effective tunnel barrier of the magnetic moment of the impurity, as well as the bias voltage are studied. This model allows us to reproduce the large magnetoresistance magnitude observed and its strong voltage dependence, with realistic parameters.
description: 19 pages, with 6 figures, references and figure captions
title: Regional Audiovisual Archives
title: Promoting Preservation Interest Group
titleType: AlternativeTitle
Creators: name: Hagan, Siobhan
Publisher: name: Maryland Shared Open Access Repository
Year: 2015
Subjects: Regional Studies
Archives
Preservation
Libraries
Video
Film
Audio

description: This PowerPoint presentation was given in San Francisco, California, during the American Library Association's annual conference, introducing the audience to the work of the Regional Audiovisual Archives Committee (RAVA) of the Association of Moving Image Archivists. The session focused on community-based audiovisual preservation and outreach and how RAVA can help smaller institutions or individuals recognize the importance of their materials and preservation needs.
description: American Library Association, Association for Library Collections and Technical Services, Association for Library Collections and Technical Services Preservation and Reformatting Section
High-frequency effects in the FitzHugh-Nagumo neuron model
Creators: name: Cubero, David
name: Baltanás, José Pablo
name: Casado-Pascual, Jesús
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The effect of a high-frequency signal on the FitzHugh-Nagumo excitable model is analyzed. We show that the firing rate is diminished as the ratio of the high-frequency amplitude to its frequency is increased. Moreover, it is demonstrated that the excitable character of the system, and consequently the firing activity, is suppressed for ratios above a given threshold value. In addition, we show that the vibrational resonance phenomenon turns up for sufficiently large noise strength values.
description: 4 pages, 4 figures (to appear in Physical Review E)
Occurrence rates of small planets from HARPS: Focus on the Galactic context
Creators: name: Bashi, Dolev
name: Zucker, Shay
name: Adibekyan, Vardan
name: Santos, Nuno C.
name: Tal-Or, Lev
name: Trifonov, Trifon
name: Mazeh, Tsevi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. The stars in the Milky Way thin and thick disks can be distinguished by several properties such as metallicity and kinematics. It is not clear whether the two populations also differ in the properties of planets orbiting the stars. In order to study this, a careful analysis of both the chemical composition and mass detection limits is required for a sufficiently large sample. Currently, this information is still limited only to large radial-velocity (RV) programs. Based on the recently published archival database of the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph, we present a first analysis of low-mass (small) planet occurrence rates in a sample of thin- and thick-disk stars. Aims. We aim to assess the effects of stellar properties on planet occurrence rates and to obtain first estimates of planet occurrence rates in the thin and thick disks of the Galaxy. As a baseline for comparison, we also aim to provide an updated value for the small close-in planet occurrence rate and compare it to results of previous RV and transit ($\textit{Kepler}$) works. Methods. We used archival HARPS RV datasets to calculate detection limits of a sample of stars that were previously analysed for their elemental abundances. For stars with known planets we first subtracted the Keplerian orbit. We then used this information to calculate planet occurrence rates according to a simplified Bayesian model in different regimes of stellar and planet properties. Results. Our results suggest that metal-poor stars and more massive stars host fewer low-mass close-in planets. We find the occurrence rates of these planets in the thin and thick disks to be comparable. In the iron-poor regimes, we find these occurrence rates to be significantly larger at the high-$α$ region (thick-disk stars) as compared with the low-$α$ region (thin-disk stars). In general, we find the...
description: 10 pages, 6 figures, accepted for publication in A&A
O Contributo do Controlo Interno na Prevenção de Erros e Fraudes - Um Estudo do Caso Fipag - Beira (2019 -2021)
Creators: name: Matambo, Aurora
name: Fainde, Marlene
Publisher: name: Revista da UI_IPSantarém
Year: 2023

description: A presente pesquisa foi realizada com o tema Contributo do Controlo Interno na Prevenção de Erros e Fraudes - um estudo do caso FIPAG - Beira (2019 -2021). A pesquisa, foi motivada pelas acções recentes ligadas aos erros e fraudes nas empresas, principalmente públicas, e resultando assim numa crescente necessidade de haver transparência e segurança nas informações finais das empresas aos parceiros e colaboradores. Em termos metodológicos, a presente pesquisa é descritiva, pois descreve os fenómenos ligados a erro e possíveis fraudes; com base no estudo de campo realizando na empresa FIPAG, por meio de questionário e entrevista submetidos aos funcionários do Departamento de Contabilidade da Empresa FIPAG e o chefe de departamento, respectivamente, bem como análise de relatórios económicos, financeiros e patrimoniais da instituição em estudo. Quanto aos resultados, a pesquisa revelou que a empresa FIPAG efectua o procedimento de controlo interno por meio de controlo contabilístico de modo a proporcionar informações financeiras bastante aproximado as regras e procedimentos previstos no regulamento do controlo interno; sustenta-se ainda que, o controlo interno tende a ser uma excelente ferramenta de gestão quando bem aplicada a realidade financeira operacional de uma empresa
description: Revista da UI_IPSantarém, Vol. 11 N.º 2 (2023): Edição Temática Unificada | Número Especial - III Simpósio de Economia e Gestão da Lusofonia 2022
Suppression of decoherence by bath ordering
Creators: name: Jing, Jun
name: Ma, H. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The dynamics of two coupled spins-1/2 coupled to a spin-bath is studied as an extended model of the Tessieri-Wilkie Hamiltonian \cite{TWmodel}. The pair of spins served as an open subsystem were prepared in one of the Bell states and the bath consisted of some spins-1/2 is in a thermal equilibrium state from the very beginning. It is found that with the increasing the coupling strength of the bath spins, the bath forms a resonant antiferromagnetic order. The polarization correlation between the two spins of the subsystem and the concurrence are recovered in some extent to the isolated subsystem. This suppression of the subsystem decoherence may be used to control the quantum devices in practical applications.
description: 32 pages, Chinese Physics (accepted)
Recordings of child language and child-caregiver interaction with Child 5, a female child aged 7 years, 6 months, 20 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of task-oriented child-caregiver interaction (researcher present). Audio and video recordings of free play between child and caregiver (researcher not present). Text file describing contents of recordings.

This is the same child as Child 30 in the materials collected in 2019 (Bundle 2018-19.068).
The AGN contribution to the UV-FIR luminosities of interacting galaxies and its role in identifying the Main Sequence
Creators: name: P., Andrés F. Ramos
name: Ashby, M. L. N.
name: Smith, Howard A.
name: Martínez-Galarza, Juan R.
name: Beverage, Aliza G.
name: Dietrich, Jeremy
name: Higuera-G., Mario-A.
name: Weiner, Aaron S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Emission from active galactic nuclei (AGNs) is known to play an important role in the evolution of many galaxies including luminous and ultraluminous systems (U/LIRGs), as well as merging systems. However, the extent, duration, and exact effects of its influence are still imperfectly understood. To assess the impact of AGNs on interacting systems, we present a Spectral Energy Distribution (SED) analysis of a sample of 189 nearby galaxies. We gather and systematically re-reduce archival broad-band imaging mosaics from the ultraviolet to the far-infrared using data from GALEX, SDSS, 2MASS, IRAS, WISE, Spitzer and Herschel. We use spectroscopy from Spitzer/IRS to obtain fluxes from fine-structure lines that trace star formation and AGN activity. Utilizing the SED modelling and fitting tool CIGALE, we derive the physical conditions of the ISM, both in star-forming regions and in nuclear regions dominated by the AGN in these galaxies. We investigate how the star formation rates (SFRs) and the fractional AGN contributions ($f_{\rm{AGN}}$) depend on stellar mass, galaxy type, and merger stage. We find that luminous galaxies more massive than about $10^{10} \rm{M}_{*}$ are likely to deviate significantly from the conventional galaxy main-sequence relation. Interestingly, infrared AGN luminosity and stellar mass in this set of objects are much tighter than SFR and stellar mass. We find that buried AGNs may occupy a locus between bright starbursts and pure AGNs in the $f_{\rm{AGN}}$-[Ne V]/[Ne II] plane. We identify a modest correlation between $f_{\rm{AGN}}$ and mergers in their later stages.
description: Accepted for publication in MNRAS; 24 pages, 15 figures, 3 tables (plus appendix)
The Comments on QED Contributions to $(g-2)_μ$
Creators: name: Kataev, A. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The comparison of definite numerical values of analytically evaluated asymptotic expressions for order $α^4$ and $α^5$ QED contributions to the muon anomalous magnetic moment with the results of numerical calculations are presented. It is stressed that observed agreement can be considered as the additional argument in favour of correctness of the recent direct numerical calculations.
description: 6 pages, presented at the 12 Lomonosov Conference on Elementary Particle Physics, Moscow State University, August 25-31, 2005; The recently corrected by Kinoshita and Nio value A_{\mu}^{(10)}=663(20) is cited
Single organic molecules for photonic quantum technologies
Creators: name: Toninelli, C.
name: Gerhardt, I.
name: Clark, A. S.
name: Reserbat-Plantey, A.
name: Götzinger, S.
name: Ristanovic, Z.
name: Colautti, M.
name: Lombardi, P.
name: Major, K. D.
name: Deperasińska, I.
name: Pernice, W. H.
name: Koppens, F. H. L.
name: Kozankiewicz, B.
name: Gourdon, A.
name: Sandoghdar, V.
name: Orrit, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Isolating single molecules in the solid state has allowed fundamental experiments in basic and applied sciences. When cooled down to liquid helium temperature, certain molecules show transition lines, that are tens of megahertz wide, limited only by the excited state lifetime. The extreme flexibility in the synthesis of organic materials provides, at low costs, a wide palette of emission wavelengths and supporting matrices for such single chromophores. In the last decades, the controlled coupling to photonic structures has led to an optimized interaction efficiency with light. Molecules can hence be operated as single photon sources and as non-linear elements with competitive performance in terms of coherence, scalability and compatibility with diverse integrated platforms. Moreover, they can be used as transducers for the optical read-out of fields and material properties, with the promise of single-quanta resolution in the sensing of charges and motion. We show that quantum emitters based on single molecules hold promise to play a key role in the development of quantum science and technologies.
description: 24 pages, 6 figures, 1 table