cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Do CEO stock options improve firm performance?
Creators: name: Morrissey, Monique Meroe
Publisher: name: American University
Year: 2023

description: Using panel data to control for CEO, firm, and industry heterogeneity, I measure the impact of CEO stock options on firm performance in the 1990s. I find that lagged stock options significantly increase shareholder returns and net income, more than compensating for the cost of the options. An alternative explanation is that CEOs who are optimistic about firm prospects push for larger option grants. I also find evidence to suggest that CEOs manipulate reported earnings to maximize option payoffs. The results do not seem driven by tax and accounting anomalies. However, they are quite sensitive to outliers, highlighting the need for further research.
Are America's cities ready for the hot times ahead?
Creators: name: Kahn-Thornbrugh, Casey
name: Harriss, Robert
name: Wilhelmi, Olga
name: Rabson, Diane
name: Weber, Jeff
name: Church, Andrew
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2001
Subjects: City governments
Human services
Community organizations
Human health
Summer heat waves
Heat warning system

The purpose of this research is to learn how city governments, human services departments, and community organizations can reduce the impact to human health from summer heat waves in U.S. cities. The city of Chicago developed its Extreme Weather Operations Plan to reduce the impact of heat waves after the tragedy experienced in 1995 when over 500 people died from excessive heat exposure (heat stroke). Another U.S. city, Philadelphia, developed a heat warning system, the Philadelphia Hot Weather Health Watch/Warning System, which used climate data and human mortality data to identify hazardous air masses (heat waves) that have the potential to elevate human mortality within the city. For this research, the case studies conducted on Chicago and Philadelphia will focus on the meteorological characteristics of a past heat wave such as length of time (days/weeks), high temperatures, low temperatures, heat index, and dew point temperatures. Then for each case study the impact on human health will be assessed. This study will be looking at heat wave mortality from exposure to excessive heat as well as mortality from other illnesses further complicated by exposure to excessive heat. Finally, this study will focus on how the heat warning systems used in Chicago and Philadelphia were able to reduce the impact to human health during heat waves and how these systems can be improved and used in other U.S. cities.
Jwst, questa volta si parte davvero
Creators: Valentina Guglielmo
Publisher: name: Media Inaf
Year: 2021

Dopo lo spauracchio di pochi giorni fa, si può tirare un sospiro di sollievo: il James Webb Telescope è davvero pronto per il volo. Completata senza sorprese la serie test per verificare la presenza di eventuali danni, la data è ora fissata per il 22 dicembre
Impact of random impurities on the anomalous Hall effect in chiral superconductors
Creators: name: Liu, Hao-Tian
name: Chen, Weipeng
name: Huang, Wen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The anomalous Hall effect and the closely related polar Kerr effect are among the most direct evidence of chiral Cooper pairing in some superconductors. While it has been known that disorder or multiband pairing is typically needed for these effects to manifest, there is a lack of direct real-space investigation with regard to how disorder impacts the Hall response in both single-band and multiband chiral superconductors. On the basis of chiral superconducting models often adopted for \SRO, we study in this work the anomalous Hall effect in the presence of random non-magnetic impurities on real-space lattices. The single-band chiral p-wave ($p_x+ip_y$) calculation qualitatively reproduces the Hall conductivity obtained in previous skew-scattering-type diagrammatic analyses, along with some quantitative difference originating primarily from contributions involving impurity-induced in-gap states. The non-p-wave chiral states, such as $d_{x^2-y^2}+id_{xy}$, generically exhibit finite Hall response in the presence of random impurities, in contrast to a conclusion drawn from the aforementioned diagrammatic study. In particular, while pointlike impurities appears to induce minuscule Hall conductivity in non-self-consistent calculations, self-consistency and finite-range impurity potentials can both lead to substantial Hall conductivity. On the other hand, the intrinsic Hall conductivity in multiband chiral superconductors, which is related to interband transitions, decreases parametrically as disorder suppresses the superconducting order parameter. In addition, we check that random impurities do not induce anomalous Hall effect in non-chiral but time-reversal symmetry breaking superconducting states the likes of $s+i d_{x^2-y^2}$ and $d_{x^2-y^2}+i g_{xy(x^2-y^2)}$. We briefly remark on the implications of our results for Kerr effect measurements.
description: 9 pages, 6 figures. Minor revision. Version accepted by PRB
Effect of crystalline disorder on magnetic switching in small magnetic cells
Creators: name: Braun, Daniel
Publisher: name: arXiv
Year: 2003
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: I present a study of the influence of disorder in thin magnetic films on the switching behavior of small magnetic cells of well defined shape and size. The disorder considered arises from randomly oriented crystalline grains of different shape, size, and crystalline orientation which gives rise to locally fluctuating intrinsic anisotropy directions and strengths. The study comprises a theoretical investigation of a disordered Stoner Wohlfarth model, as well as micromagnetic simulations. I show that the fluctuations in the total anisotropy and therefore in the switching fields are controlled by a single dimensionless parameter. The theoretical findings are well confirmed by micromagnetic simulations of many different samples
description: 18 pages of LaTex, 5 eps figures. Originally submitted to J. Magn. Mag. Mater. on January 3, 2002
Determinanty popytu usług agroturystycznych
Determinants of Demand for Agritourism Services
Creators: name: Sieczko, Anna
name: Sieczko, Leszek
name: Sieczko, Anna
name: Sieczko, Leszek
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Farm Management
subject: agritourism farms
subject: accommodation
subject: tourist attractions
subject: food on farms
subject: gospodarstwa agroturystyczne
subject: baza noclegowa
subject: atrakcje turystyczne
subject: wyżywienie w gospodarstwach

description: The article attempts to determine the main determinants of agritourism services among tourists from Poland, Ukraine and Belarus. Recently, the number of labor immigrants from Ukraine has grown sharply and they are being noticed not only as employees but also as consumers. The purpose of the work was to determine the main determinants affecting the perception of agritourism. The research was carried out in the form of a questionnaire. The results presented are based on 250 respondents. The main features taken into consideration during the selection of agrotourism services were indicated. The examined features are presented in a four-level scale, which allows to more precisely divide users of agritourism services. / Synopsis. W artykule podjęto próbę określenia głównych determinant usług agroturystycznych wśród turystów z Polski oraz Ukrainy i Białorusi. W ostatnim czasie grupa imigrantów zarobkowych z Ukrainy gwałtownie wzrosła i zaczęto zauważać ich nie tylko jako pracowników ale także konsumentów. Celem pracy było określenie głównych determinant wpływających na postrzeganie agroturystyki. Badania zostały przeprowadzone w formie kwestionariusza ankiety. Przedstawione wyniki opierają się na 250 respondentach. Wskazane zostały główne cechy brane pod uwagę podczas wyboru usług agroturystycznych. Badane cechy są przedstawione w czterostopniowej skali co pozwala w szczegółach dokładniej podzielić turystów usług agroturystycznych.
description: DOI: 10.22630/PRS.2018.18.2.53
Getti relativistici nascosti e dove trovarli
Creators: Ufficio stampa Inaf
Publisher: name: Media Inaf
Year: 2021

Un gruppo di ricercatrici e ricercatori dell’Istituto nazionale di astrofisica ha scoperto potenti getti emessi da due buchi neri supermassicci attivi – noti come quasar – in un’epoca remotissima, ovvero quando l’universo aveva circa un miliardo di anni. I buchi neri osservati sono a oggi i più massicci conosciuti a una tale distanza da noi. Tutti i dettagli su Astronomy & Astrophysics
Scoperti 366 nuovi pianeti extrasolari
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2021

Un team internazionale di astronomi del progetto "Scaling K2" ha identificato 366 nuovi pianeti extrasolari, tra i quali un sistema planetario che comprende una stella e almeno due pianeti giganti gassosi, ciascuno grosso modo delle dimensioni di Saturno, situati insolitamente vicini l'uno all'altro. Tutti i dettagli su ApJ
Constructing Object Groups Corresponding to Concepts for Recovery of a Summarized Sequence Diagram
Creators: name: Noda, Kunihiro
name: Kobayashi, Takashi
name: Agusa, Kiyoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: D.2.7

description: Comprehending the behavior of an object-oriented system solely from its source code is troublesome, owing to its dynamism. To aid comprehension, visualizing program behavior through reverse-engineered sequence diagrams from execution traces is a promising approach. However, because of the massiveness of traces, recovered diagrams tend to become very large, causing scalability issues. To address the issues, we propose an object grouping technique that horizontally summarizes a reverse-engineered sequence diagram. Our technique constructs object groups based on Pree's meta patterns, in which each group corresponds to a concept in the domain of a subject system. Visualizing interactions only among important groups, we generate a summarized sequence diagram depicting a behavioral overview of the system. Our experiment showed that our technique outperformed the state-of-the-art trace summarization technique in terms of reducing the horizontal size of reverse-engineered sequence diagrams. Regarding the quality of object grouping, our technique achieved an F-score of 0.670 and a Recall of 0.793 on average under the condition of #lifelines (i.e., the horizontal size of a sequence diagram) < 30, whereas those of the state-of-the-art technique were 0.421 and 0.670, respectively. The runtime overhead imposed by our technique was 129.2% on average, which is relatively smaller in the literature.
description: Accepted to appear in Journal of Information Processing
Dart, lancio avvenuto. Colpirà un asteroide
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2021

È la prima missione di difesa planetaria mai intrapresa dalla Nasa. I risultati serviranno a mettere a punto un sistema per proteggere la Terra da un futuro impatto con un asteroide. A bordo c’è anche LiciaCube, un satellite dell’Agenzia spaziale italiana, progettato e realizzato da Argotec, che avrà il compito fotografare e raccogliere dati scientifici dell’impatto
Stopping Light All-Optically
Creators: name: Yanik, Mehmet Fatih
name: Fan, Shanhui
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that light pulses can be stopped and stored all-optically, with a process that involves an adiabatic and reversible pulse bandwidth compression occurring entirely in the optical domain. Such a process overcomes the fundamental bandwidth-delay constraint in optics, and can generate arbitrarily small group velocities for light pulses with a given bandwidth, without the use of any coherent or resonant light-matter interactions. We exhibit this process in optical resonator systems, where the pulse bandwidth compression is accomplished only by small refractive index modulations performed at moderate speeds. (Accepted for publication in Phys. Rev. Lett. Submitted on Sept. 10th 2003)
description: 18 pages including 3 figures. Accepted for publication in Phys. Rev. Lett
Universi da ascoltare, il nuovo podcast dell’Inaf
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2021

L’Istituto nazionale di astrofisica entra nel mondo dei podcast con “Universi da ascoltare”, una serie di letture alla scoperta del cielo e dello spazio. Apre la nuova serie l’attore Andrea Pennacchi con il celebre brano di Carl Sagan “Pale blue dot”. A cura di Polvere di Stelle e dell’Inaf di Arcetri
Mid- to Far-Infrared spectroscopy of Sharpless 171
Creators: name: Okada, Y.
name: Onaka, T.
name: Shibai, H.
name: Doi, Y.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have collected one-dimensional raster-scan observations of the active star-forming region Sharpless 171 (S171), a typical HII region-molecular cloud complex, with the three spectrometers (LWS, SWS, and PHT-S) on board ISO. We have detected 8 far-infrared fine-structure lines, [OIII] 52um, [NIII] 57um, [OI] 63um, [OIII] 88um, [NII] 122um, [OI] 146um, [CII] 158um, and [SiII] 35um together with the far-infrared continuum and the H2 pure rotation transition (J=5-3) line at 9.66um. The physical properties of each of the three phases detected, highly-ionized, lowly-ionized and neutral, are investigated through the far-infrared line and continuum emission. Toward the molecular region, strong [OI] 146um emission was observed and the [OI] 63um to 146um line ratio was found to be too small (about 5) compared to the values predicted by current photodissociation region (PDR) models. We examine possible mechanisms to account for the small line ratio and conclude that the absorption of the [OI] 63um and the [CII] 158um emission by overlapping PDRs along the line of sight can account for the observations and that the [OI] 146um emission is the best diagnostic line for PDRs. We propose a method to estimate the effect of overlapping clouds using the far-infrared continuum intensity and derive the physical properties of the PDR. The [SiII] 35um emission is quite strong at almost all the observed positions. The correlation with [NII] 122um suggests that the [SiII] emission originates mostly from the ionized gas. The [SiII] 35um to [NII] 122um ratio indicates that silicon of 30% of the solar abundance must be in the diffuse ionized gas, suggesting that efficient dust destruction is undergoing in the ionized region.
description: 15 pages with 15 figures, accepted in Astronomy & Astrophysics
Do CEO stock options improve firm performance?
Creators: name: Morrissey, Monique Meroe
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 38
subject: Economics

description: Using panel data to control for CEO, firm, and industry heterogeneity, I measure the impact of CEO stock options on firm performance in the 1990s. I find that lagged stock options significantly increase shareholder returns and net income, more than compensating for the cost of the options. An alternative explanation is that CEOs who are optimistic about firm prospects push for larger option grants. I also find evidence to suggest that CEOs manipulate reported earnings to maximize option payoffs. The results do not seem driven by tax and accounting anomalies. However, they are quite sensitive to outliers, highlighting the need for further research.
A Chandra observation of the disturbed cluster core of Abell 2204
Creators: name: Sanders, J. S.
name: Fabian, A. C.
name: Taylor, G. B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from an observation of the luminous cluster of galaxies Abell 2204 using the Chandra X-ray Observatory. We show the core of the cluster has a complex morphological structure, made up of a high density core (n_e~0.2 cm^-3) with flat surface brightness, a surrounding central plateau, a tail-like feature, wrapping around to the east, and an unusual radio source. A temperature map and deprojected-profile shows that the temperature rises steeply outside these regions, until around ~100 kpc where it drops, then rises again. Abundance maps and profiles show that there is a corresponding increase in abundance at the same radius as where the temperature drops. In addition there are two cold fronts at radii of ~28 and 54.5 kpc. The disturbed morphology indicates that the cluster core may have undergone a merger. However, despite this disruption the mean radiative cooling time in the centre is short (~230 Myr) and the morphology is regular on large scales.
description: 7 pages, submitted to MNRAS
Emergence of highly coherent quantum subsystems of a noisy and dense spin system
Creators: name: Beckert, A.
name: Grimm, M.
name: Wili, N.
name: Tschaggelar, R.
name: Jeschke, G.
name: Matmon, G.
name: Gerber, S.
name: Müller, M.
name: Aeppli, G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum sensors and qubits are usually two-level systems (TLS), the quantum analogs of classical bits which assume binary values '0' or '1'. They are useful to the extent to which they can persist in quantum superpositions of '0' and '1' in real environments. However, such TLS are never alone in real materials and devices, and couplings to other degrees of freedom limit the lifetimes - called decoherence times - of the superposition states. Decoherence occurs via two major routes - excitation hopping and fluctuating electromagnetic fields. Common mitigation strategies are based on material improvements, exploitation of clock states which couple only to second rather than first order to external perturbations, and reduction of interactions via extreme dilution of pure materials made from isotopes selected to minimize noise from nuclear spins. We demonstrate that for a dense TLS network in a noisy nuclear spin bath, we can take advantage of interactions to pass from hopping to fluctuation dominance, increasing decoherence times by almost three orders of magnitude. In the dilute rare-earth insulator LiY1-xTbxF4, Tb ions realize TLS characterized by a 30GHz splitting and readily implemented clock states. Dipolar interactions lead to coherent, localized pairs of Tb ions, that decohere due to fluctuating quantum mechanical ring-exchange interaction, sensing the slow dynamics of the surrounding, nearly localized Tb spins. The hopping and fluctuation regimes are sharply distinguished by their Rabi oscillations and the invisible vs. strong effect of classic 'error correcting' microwave pulse sequences. Laying open the decoherence mechanisms at play in a dense, disordered and noisy network of interacting TLS, our work expands the search space for quantum sensors and qubits to include clusters in dense, disordered materials, that can be explored for localization effects.
description: 39 pages
Centris (Centris) varia BCP (CARCIB
Creators: name: Pedro, Diego De
name: Ceccarelli, Fadia Sara
name: Sagot, Philippe
name: López-Reyes, Eulogio
name: Mullins, Jessica L.
name: Mérida-Rivas, Jorge A.
name: Falcon-Brindis, Armando
name: Griswold, Terry
name: Ascher, John S.
name: Gardner, Joel
name: Ayala, Ricardo
name: Vides-Borrell, Eric
name: Vandame, Rémy
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae
Centris
Centris varia

description: Centris (Centris) varia (Erichson, 1848) *
[♀ Guyana]
Centris varia is primarily a tropical species that is distributed from southern Brazil to Mexico. A male collected in the Sarcocaulescent Shrubland in September 2016 and vouchered at CARCIB collection represents a new record for the BCP. To our knowledge, it is only present in the southern tip of the BCS peninsula. See fig. 86.
description: Published as part of Pedro, Diego De, Ceccarelli, Fadia Sara, Sagot, Philippe, López-Reyes, Eulogio, Mullins, Jessica L., Mérida-Rivas, Jorge A., Falcon-Brindis, Armando, Griswold, Terry, Ascher, John S., Gardner, Joel, Ayala, Ricardo, Vides-Borrell, Eric & Vandame, Rémy, 2024, Revealing the Baja California Peninsula's Hidden Treasures: An Annotated checklist of the native bees (Hymenoptera: Apoidea: Anthophila), pp. 1-391 in Zootaxa 5522 (1) on page 148, DOI: 10.11646/zootaxa.5522.1.1, http://zenodo.org/record/13920532
The specification of an industry value-added price and quantity index pair
Creators: name: Moyer, Brian C.
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 38
subject: Economics
classificationCode: 3803
subject: Economic theory

description: The proper specification of an industry value-added price and quantity index pair is essential to accurately measuring inflation-adjusted growth rates among the industries that comprise the nation's Gross Domestic Product. The current literature in this area does not offer industry value-added index pairs that are both theoretically defensible and empirically sound. This research develops preferred value-added index pairs following a production-based approach. By drawing from both the production and the aggregation literatures, this research uses the techniques of production and index-number theory to solve a representative industry's value-added aggregation problem---that is, the choice problem in which an industry identifies how its primary inputs (value-added inputs; capital and labor) and its secondary inputs (energy, materials, and services) combine to produce output. The resulting value-added index pairs are examined empirically and are shown to perform well under a variety of economic conditions, including conditions under which traditional and contemporary measurement approaches have commonly failed.
On perfect colorings of infinite multipath graphs
Creators: name: Lisitsyna, M. A.
name: Avgustinovich, S. V.
name: Parshina, O. G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15

description: A coloring of vertices of a given graph is called perfect if the color structure of each ball of radius $1$ in the graph depends only on the color of the ball center. Let $n$ be a positive integer. We consider a lexicographic product of the infinite path graph and a graph $G$ that can be either the complete or empty graph on $n$ vertices. We give a complete description of perfect colorings with an arbitrary number of colors of such graph products.
description: 12 pages, 1 figures
Comparing properties of cirrus clouds in the tropics and mid-latitudes
Creators: name: Walford, Segayle
name: Mcfarquhar, Gregory
name: Smith, Michael
name: Orendorff, Delaine
name: Tessendorf, Sarah
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2001
Subjects: Radiation budget
Shortwave solar radiateion
Longwave terrestrial radiation
Microphysical properties
Ice particles
Global climate models

Cirrus clouds play an important role in the radiation budget of the atmosphere by reflecting shortwave solar radiation and absorbing longwave terrestrial radiation. There is large variability in the microphysical properties (size, shape, and density) of ice particles within cirrus clouds, which may be associated with the regions (tropics or mid-latitudes) where they develop. This variation makes it hard to generalize these clouds and incorporate these properties in global climate models. Mass-weighted terminal velocity distributions of the ice crystals in cirrus clouds from the tropics and mid-latitudes were calculated and compared. The maximum dimensions and the area ratios of ice crystals in the mid-latitudes were measured from the Southern Great Plains region of the Atmospheric Radiation Measurement program. Using this information a classification scheme was developed with three habits (shapes): column, aggregate, and bullet rosette. A fall velocity for each size and shape of ice crystal was calculated. Based on a temperature of -40ยบC and a pressure of 300 hPa, a mass weighted terminal velocity was derived. This method was repeated for the tropics using similar data from the Central Equatorial Pacific Experiment. A comparison of mass-weighted terminal velocity was conducted for the two different regions. In addition, best-fit and temperature dependent curves of terminal velocities versus ice mass content, suitable for cloud models, were derived. The mass-weighted terminal velocity increased with ice mass content for both regimes. In addition, the warmer ice crystal temperatures corresponded to higher mass-weighted terminal velocities.
Linear colossal magnetoresistance driven by magnetic textures in LaTiO3 thin films on SrTiO3
Creators: name: Tschirner, Teresa
name: Leikert, Berengar
name: Kern, Felix
name: Wolf, Daniel
name: Lubk, Axel
name: Kamp, Martin
name: Miller, Kirill
name: Hartmann, Fabian
name: Höfling, Sven
name: Büchner, Bernd
name: Dufouleur, Joseph
name: Gabay, Marc
name: Sing, Michael
name: Claessen, Ralph
name: Veyrat, Louis
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Linear magnetoresistance (LMR) is of particular interest for memory, electronics, and sensing applications, especially when it does not saturate over a wide range of magnetic fields. One of its principal origins is local mobility or density inhomogeneities, often structural, which in the Parish-Littlewood theory leads to an unsaturating LMR proportional to mobility. Structural disorder, however, also tends to limit the mobility and hence the overall LMR amplitude. An alternative route to achieve large LMR is via non-structural inhomogeneities which do not affect the zero field mobility, like magnetic domains. Here, linear positive magnetoresistance caused by magnetic texture is reported in \ch{LaTiO3}/\ch{SrTiO3} heterostructures. The LMR amplitude reaches up to 6500\% at 9T. This colossal value is understood by the unusual combination of a very high thin film mobility, up to 40 000 cm$^2$/V.s, and a very large coverage of low-mobility regions. These regions correlate with a striped magnetic structure, compatible with a spiral magnetic texture in the \ch{LaTiO3} film, revealed by low temperature Lorentz transmission electron microscopy. These results provide a novel route for the engineering of large-LMR devices.
Verified Instruction-Level Energy Consumption Measurement for NVIDIA GPUs
Creators: name: Arafa, Yehia
name: ElWazir, Ammar
name: ElKanishy, Abdelrahman
name: Aly, Youssef
name: Elsayed, Ayatelrahman
name: Badawy, Abdel-Hameed
name: Chennupati, Gopinath
name: Eidenbenz, Stephan
name: Santhi, Nandakishore
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: GPUs are prevalent in modern computing systems at all scales. They consume a significant fraction of the energy in these systems. However, vendors do not publish the actual cost of the power/energy overhead of their internal microarchitecture. In this paper, we accurately measure the energy consumption of various PTX instructions found in modern NVIDIA GPUs. We provide an exhaustive comparison of more than 40 instructions for four high-end NVIDIA GPUs from four different generations (Maxwell, Pascal, Volta, and Turing). Furthermore, we show the effect of the CUDA compiler optimizations on the energy consumption of each instruction. We use three different software techniques to read the GPU on-chip power sensors, which use NVIDIA's NVML API and provide an in-depth comparison between these techniques. Additionally, we verified the software measurement techniques against a custom-designed hardware power measurement. The results show that Volta GPUs have the best energy efficiency of all the other generations for the different categories of the instructions. This work should aid in understanding NVIDIA GPUs' microarchitecture. It should also make energy measurements of any GPU kernel both efficient and accurate.
Sectional nonassociativity of metrized algebras
Creators: name: Fox, Daniel J. F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: The sectional nonassociativity of a metrized (not necessarily associative or unital) algebra is defined analogously to the sectional curvature of a pseudo-Riemannian metric, with the associator in place of the Levi-Civita covariant derivative. For commutative real algebras nonnegative sectional nonassociativity is usually called the Norton inequality, while a sharp upper bound on the sectional nonassociativity of the Jordan algebra of Hermitian matrices over a real Hurwitz algebra is closely related to the Böttcher-Wenzel-Chern-do Carmo-Kobayashi inequality. These and other basic examples are explained, and there are described some consequences of bounds on sectional nonassociativity for commutative algebras. A technical point of interest is that the results work over the octonions as well as the associative Hurwitz algebras.
description: v3: Added missing "nontrivial" in the statement of Lemma 8.6 and eliminated from its proof an incorrect argument using an unnecessary hypothesis that has also been removed from its statement. The change has no further ramifications in the paper
Brane gases in the early universe: thermodynamics and cosmology
Creators: name: Easther, Richard
name: Greene, Brian R.
name: Jackson, Mark G.
name: Kabat, Daniel
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the thermodynamic and cosmological properties of brane gases in the early universe. Working in the low energy limit of M-theory we assume the universe is a homogeneous but anisotropic 10-torus containing wrapped 2-branes and a supergravity gas. We describe the thermodynamics of this system and estimate a Hagedorn temperature associated with excitations on the branes. We investigate the cross-section for production of branes from the thermal bath and derive Boltzmann equations governing the number of wrapped branes. A brane gas may lead to decompactification of three spatial dimensions. To investigate this possibility we adopt initial conditions in which we fix the volume of the torus but otherwise assume all states are equally likely. We solve the Einstein-Boltzmann equations numerically, to determine the number of dimensions with no wrapped branes at late times; these unwrapped dimensions are expected to decompactify. Finally we consider holographic bounds on the initial volume, and find that for allowed initial volumes all branes typically annihilate before freeze-out can occur.
description: 33 pages, LaTeX, 6 figures. v2: added references
Determining the Performance Measurement of SME from Economic Value Added: Study on Hungary, Somogy County
Creators: name: Singh, Devesh
name: Gál, Zoltán
name: Huseynov, Raqif
name: Wojtaszek, Michał
name: Singh, Devesh
name: Gál, Zoltán
name: Huseynov, Raqif
name: Wojtaszek, Michał
Publisher: name: Unknown
Year: 2018
Subjects: subject: Farm Management
subject: Industrial Organization
subject: economic value added
subject: small and medium-sized enterprises SMEs
subject: performance measurement
subject: Hungary
subject: Somogy County

description: EVA (Economic Value Added) permits commercial businesses to figure out whether the business is operating in profit and the money can be put into effect into a more profitable source. A leading EVA is a sign that the company has a greater value. The goal of this study is to identify if SMEs' actions carried out on a daily basis are able to generate economic value added for their business. The study is based on a comparative study between Hungary and 28 EU countries. The study is carried out in Hungary’s region of Somogy county. First, the variables for research were created and research was carried out at ground level. The research used the Expletory Factor analysis method to find EVA determinants. The results showed that determinants work together to reshape the regional industrial growth. The research demonstrated that finance and sluggish production are the major determinants in Somogy county. Entrepreneurs' skills and finance have the major impact, which means that to achieve a high growth in SMEs, policy makers have to solve these two problems and make the policy concentric toward finance and high skill development problem.
description: DOI: 10.22630/PRS.2018.18.2.54
Quantum black holes in bootstrapped Newtonian gravity
Creators: name: Casadio, R.
name: Lenzi, M.
name: Ciarfella, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyse the classical configurations of a bootstrapped Newtonian potential generated by homogeneous spherically symmetric sources in terms of a quantum coherent state. We first compute how the mass and mean wavelength of these solutions scale in terms of the number of quanta in the coherent state. We then note that the classical relation between the ADM mass and the proper mass of the source naturally gives rise to a Generalised Uncertainty Principle for the size of the gravitational radius in the quantum theory. Consistency of the mass and wavelength scalings with this GUP requires the compactness remains at most of order one even for black holes, and the corpuscular predictions are thus recovered, with the quantised horizon area expressed in terms of the number of quanta in the coherent state. Our findings could be useful for analysing the classicalization of gravity in the presence of matter and the avoidance of singularities in the gravitational collapse of compact sources.
description: LaTeX, 27 pages, 6 figures, clarifications added, to appear in PRD
Additional file 1 of Open necrosectomy in acute pancreatitis–obsolete or still useful?
Creators: name: Husu, Henrik Leonard
name: Kuronen, Jouni Antero
name: Leppäniemi, Ari Kalevi
name: Mentula, Panu Juhani
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1:. Additional Table 1. Reoperations Within 6 Months and Endoscopic/Other Procedures Within One Year After First Necrosectomy.
Wykorzystanie czynników produkcji w gospodarstwach specjalizujących się w chowie bydła rzeźnego w wybranych krajach Unii Europejskiej
The Use of Production Factors in Farms Specializing in Production of Fattening Cattle in Selected European Union Countries
Creators: name: Skarżyńska, Aldona
name: Skarżyńska, Aldona
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: International Development
subject: Livestock Production/Industries
subject: Productivity Analysis
subject: beef production
subject: factors of production
subject: efficiency
subject: subsidies
subject: produkcja wołowiny
subject: czynniki produkcji
subject: efektywność
subject: dopłaty

description: The aim of the study was to assess the use of production factors in farms specializing in production of cattle for fattening in six countries, which are the biggest producers of beef in the EU-15 (in France, Germany, Italy, Great Britain, Spain and Ireland) and in two countries included in the EU N13 (in Poland and Romania). The research used FADN EU average data in 2010-2015. The productivity and profitability of production factors, the economic efficiency of production and the dependence of farms on subsidies were examined. The results indicate an advantage of beef producers in Italy, Spain, Romania and Poland. In farms in France, Germany, Great Britain and Ireland, the costs were higher than the value production, as a result the income was a negative value. The loss was covered by subsidies, which also influenced the amount of income, but its level did not result from high production efficiency. / Synopsis. Celem badań była ocena wykorzystania czynników produkcji w gospodarstwach specjalizujących się w chowie bydła rzeźnego w sześciu krajach, które są największymi producentami wołowiny w UE-15 (we Francji, Niemczech, Włoszech, Wielkiej Brytanii, Hiszpanii i Irlandii) i w dwóch krajach zaliczanych do UE-N13 (w Polsce i Rumunii). W badaniach wykorzystano dane FADN EU średnie w latach 2010-2015. Zbadano produktywność i dochodowość czynników wytwórczych, sprawność ekonomiczną produkcji oraz uzależnienie gospodarstw od dopłat. Wyniki wskazują na przewagę producentów wołowiny we Włoszech, Hiszpanii, Rumunii i w Polsce. W gospodarstwach we Francji, Niemczech, Wielkiej Brytanii i Irlandii koszty były wyższe od wartości produkcji, w efekcie dochód był ujemny. Stratę pokryły dopłaty, miały też wpływ na wysokość dochodu, jego poziom nie wynikał jednak z wysokiej efektywności produkcji.
description: DOI: 10.22630/PRS.2018.18.2.55
DETERMINANTS OF AGRICULTURAL PRODUCTIVITY IN MALAWI
Creators: name: Phiri, Shakira
name: Phiri, Shakira
Publisher: name: Unknown
Year: 2018
Subjects: Agricultural and Food Policy
Productivity Analysis

description: A THESIS SUBMITTED TO THE FACULTY OF DEVELOPMENT STUDIES IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR AWARD OF THE DEGREE OF MASTER OF SCIENCE IN AGRICULTURAL AND APPLIED ECONOMICS LILONGWE UNIVERSITY OF AGRICULTURE AND NATURAL RESOURCES BUNDA CAMPUS. Advisors: Prof. Abdi-Khalil Edriss, Dr. Horace Phiri, Dr. Donald Makoka
PARTICIPATION IN AND IMPACT OF SMALL-SCALE IRRIGATION PRACTICE ON HOUSEHOLD INCOME: THE CASE OF ABAY CHOMEN DISTRICT OF OROMIA NATIONAL REGIONAL STATE, ETHIOPIA
Creators: name: Lebeta, Temesgen Hirko
name: Lebeta, Temesgen Hirko
Publisher: name: Unknown
Year: 2017
Subjects: Consumer/Household Economics
Resource /Energy Economics and Policy

description: A Thesis Submitted to School of Agricultural Economics and Agribusiness, Postgraduate Program Directorate, HARAMAYA UNIVERSITY In Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE IN AGRICULTURE (AGRICULTURAL AND APPLIED ECONOMICS). Advisors: Mengistu Ketema, Fekadu Beyene
Velocity Gradient in the Presence of Self-Gravity: Identifying Gravity-induced Inflow and Determining Collapsing Stage
Creators: name: Hu, Yue
name: Lazarian, Alex
name: Yuen, Ka Ho
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: Understanding how star formation is regulated requires studying the energy balance between turbulence, magnetic fields, stellar feedback, and gravity within molecular clouds. However, identifying the transition region where the gravity takes over remains elusive. Recent studies of the Velocity Gradient Technique (VGT), which is an advanced tool for magnetic field studies, reveal that the gradients of spectroscopic observables change their directions by 90 degrees with respect to the magnetic fields in the regions of gravitational collapse. In this study, we perform 3D MHD numerical simulations. We observe that star formation successfully proceeds in strongly magnetized and fully ionized media. We confirm that the self-gravity induces the change of gradients' orientation and high gradients' amplitude. We explore two ways of identifying collapsing self-gravitating regions through the double-peak feature in the histogram of gradients' orientation and the curvature of gradients. We show that velocity gradients' morphology and amplitude can be synthetically used to trace the convergent inflows. By comparing with the column density Probability Density Functions (N-PDFs) method, we show that VGT is a powerful new tool for studying the gas dynamics and tracing magnetic field in star-forming regions. By analogy with VGT, we extend the Intensity Gradient Technique (IGT) to locate the gravitational collapsing region and shocks. We demonstrate the synergy of VGT and IGT can determine the collapsing stages in a star-forming region.
description: 36 pages, 24 figures, accepted for publication in ApJ
James Webb, l’attesa si allunga
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2021

Lancio rimandato dal 18 ad almeno il 22 dicembre, ha fatto sapere ieri la Nasa. A causa di un imprevisto durante le operazioni di integrazione del telescopio nel razzo Ariane 5 che dovrà portarlo nello spazio. Nel frattempo è uscito sulla Cnn un documentario tutto dedicato a quest’ambiziosissima missione
A fuzzy logic system for predicting hurricane intensity in the Eastern North Pacific
Creators: name: Vigh, Jonathan
name: Petty, Kevin
name: Dalton, Shel
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2000

The primary goal of this research is to examine the efficacy of using a fuzzy logic/adaptive weighting (FLAW) technique to predict hurricane intensity change in the eastern North Pacific (ENP) basin. The intensity change forecasts, for 12-hour intervals ranging from 12 to 72 hours, produced by a model using FLAW are compared to a model developed using the standard statistical technique of multiple linear regression (MLR). To this end, climatology and persistence variables, as well as observed intensity changes, are computed and extracted from the National Hurricane Center (NHC) best-track dataset and the weekly National Oceanic and Atmospheric Administration (NOAA) global optimum interpolation weekly sea surface temperature dataset for the years of 1982-99. The climatology and persistence predictors used for both models include the previous 6-hour intensity change, latitude of the hurricane center, current intensity at the time of the observation, and sea surface temperature interpolated to the time and location of the observed hurricane center. The FLAW technique is based on the Standard Additive Method (SAM) developed by Kosko. The method adapts the weights given to predictors to decrease the difference between the forecast and observed value. Preliminary results suggest that the FLAW model produces errors comparable in magnitude to the MLR model. The bias is significantly less for the 36-, 48-, 60-, and 72-hour forecast periods. Several case studies show that the model is able to adapt the weighting appropriately when the one or more predictors become over-dominant. With more work and the inclusion of synoptic predictors, this method may eventually offer improved hurricane intensity change guidance for forecasters, thus reducing the loss of lives and property.
ANALYSIS OF THE USE OF INOCULANT-BASED TECHNOLOGIES BY SMALLHOLDER FARMERS AND ITS EFFECT ON OUTPUT COMMERCIALIZATION: CASE OF FIELD BEAN FARMERS IN WESTERN KENYA
Creators: name: Wafullah, Teresah Nekesah
name: Wafullah, Teresah Nekesah
Publisher: name: Unknown
Year: 2017
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF THE DEGREE OF MASTER OF SCIENCE IN AGRICULTURAL AND APPLIED ECONOMICS DEPARTMENT OF AGRICULTURAL ECONOMICS UNIVERSITY OF NAIROBI. Advisors: Dr. Julius Juma Okello, Dr. David Jakinda Oteino, Prof. Nancy Njarua Karanja
Stellar variability as observed in the high amplitude Î´-scuti star CY Aquarii
Creators: name: Sands, J.
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2003

This project investigated whether a quantitative detection could be made of a variable star, in our case CY Aquarii shown in Figure 1, and whether the period could be confirmed by the existing literature. Variable stars are either intrinsic or extrinsic. CY Aqr is an intrinsic variable star since it varies due to pulsation. There are different types of variable stars and they are classified according to their period. The star observed in this project is a high-amplitude Î´-scuti type subclass SX Phoenicis (McNamara et al. 1996) star.
Disentangling Electron-Boson Interactions on the Surface of a Familiar Ferromagnet
Creators: name: Røst, Håkon I.
name: Mazzola, Federico
name: Bakkelund, Johannes
name: Åsland, Anna Cecilie
name: Hu, Jinbang
name: Cooil, Simon P.
name: Polley, Craig M.
name: Wells, Justin W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report energy renormalizations from electron-phonon and electron-magnon interactions in spin minority surface resonances on Ni(111). The different interactions are identified, disentangled, and quantified from the characteristic signatures they provide to the complex self-energy and the largely different binding energies at which they occur. The observed electron-magnon interactions exhibit a strong dependence on momentum and energy band position in the bulk Brillouin zone. In contrast, electron-phonon interactions from the same bands appear to be relatively momentum- and symmetry-independent. Additionally, a moderately strong ($λ>0.5$) electron-phonon interaction is distinguished from a near-parabolic spin majority band not crossing the Fermi level.
Va all’asta “The road to Relativity” di Einstein
Creators: Rossella Spiga
Publisher: name: Media Inaf
Year: 2021

Martedì 23 novembre, a Parigi, sarà venduto all’asta per una cifra da capogiro il manoscritto autografo di Albert Einstein che documenta la genesi della teoria della relatività generale. Il manoscritto, scritto a quattro mani con l’amico ingegnere italo-svizzero Michele Besso, è quotato oltre tre milioni di dollari e contiene i calcoli della precessione del perielio di Mercurio che sarebbero serviti a dimostrare una prima (errata) versione della relatività generale
Centris (Paracentris) atripes Mocsary 1899
Creators: name: Pedro, Diego De
name: Ceccarelli, Fadia Sara
name: Sagot, Philippe
name: López-Reyes, Eulogio
name: Mullins, Jessica L.
name: Mérida-Rivas, Jorge A.
name: Falcon-Brindis, Armando
name: Griswold, Terry
name: Ascher, John S.
name: Gardner, Joel
name: Ayala, Ricardo
name: Vides-Borrell, Eric
name: Vandame, Rémy
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae
Centris
Centris atripes

description: Centris (Paracentris) atripes Mocsáry, 1899
[Holotype: HNHM; ♂ Presidió (Praesidio), Sinaloa, Mexico]
This species is widespread throughout southwestern North America and has been reported in BC and BCS (Ayala et al. 1996) and Snelling (1974) reports C. atripes in BCS. We reviewed one male collected in the Central Desert in BCS in September 1941 (CASC). Additionally, the BBPT collected one male in the Magdalena Plains in March 2021 Magdalena Plains (MABC). See fig. 86.
description: Published as part of Pedro, Diego De, Ceccarelli, Fadia Sara, Sagot, Philippe, López-Reyes, Eulogio, Mullins, Jessica L., Mérida-Rivas, Jorge A., Falcon-Brindis, Armando, Griswold, Terry, Ascher, John S., Gardner, Joel, Ayala, Ricardo, Vides-Borrell, Eric & Vandame, Rémy, 2024, Revealing the Baja California Peninsula's Hidden Treasures: An Annotated checklist of the native bees (Hymenoptera: Apoidea: Anthophila), pp. 1-391 in Zootaxa 5522 (1) on page 148, DOI: 10.11646/zootaxa.5522.1.1, http://zenodo.org/record/13920532