julilili42/papers huggingface dataset:
Overall View of the JEM-EUSO Instruments
2011-01-01

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation F. Kajino, T. Ebisuzaki, H. Mase, K. Tsuno, Y. Takizawa, Y. Kawasaki, K. Shinozaki, H. Ohmori, S. Wada, N. Inoue, N. Sakaki, J. Adams, M. Christl, R. Young, C. Ferguson, M. Bonamente, A. Santangelo, M. Teshima, E. Parizot, P. Gorodetzky, O. Catalano, P. Picozza, M. Casolino, M. Bertaina, M. Panasyuk, B. A. Khrenov, I. H. Park, A. Neronov, G. Medina‐Tanco, D. Rodriguez‐Frias, J. Szabelski, P. Bobik, R. Tsenov, The JEM‐EUSO collaboration; Overall View of the JEM‐EUSO Instruments. AIP Conference Proceedings 22 September 2011; 1367 (1): 197–200. https://doi.org/10.1063/1.3628744 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search
Spectral Analysis of Mid-IR Excesses of White Dwarfs
2011-01-01

In our Spitzer 24 μm survey of hot white dwarfs (WDs) and archival Spitzer study of pre‐WDs, i.e., central stars of planetary nebulae (CSPNs), we found mid‐IR excesses for ∼15 WDs/pre‐WDs. These mid‐IR excesses are indicative of the presence of circumstellar dust that could be produced by sub‐planetary objects. To further assess the nature of these IR‐excesses, we have obtained Spitzer IRS, Gemini NIRI and Michelle, and KPNO 4 m echelle spectra of these objects. In this paper we present the analysis of these spectroscopic observations and discuss the nature of these IR excesses.
AERODYNAMIC PERFORMANCE AND FLOW STRUCTURE OVER A THIN AIRFOIL UNDER SMOOTH AND TURBULENT CONDITIONS AT LOW REYNOLDS NUMBERS
2011-01-01

Micro Air Vehicles (MAVs) are small remotely controlled or autonomous aircrafts that fly relatively slowly (50,000 &lt; Reynolds number &lt; 200,000) and very close to the Earth surface. MAVs are very difficult to fly in the outdoor environment as they are exposed to both low Reynolds number effects and high levels of turbulence. To shed light on the influence of turbulence on the flow structure over an airfoil and on aerodynamic performance, smoke-flow visualization and surface pressures measurements were taken over a thin flat-plate airfoil under nominally smooth and turbulent conditions. A high level of detail on various flow structures that developed over the airfoil in nominally smooth flow including the laminar separation bubble (LSB), formation of instabilities in the separated shear layer, and vortices shed on reattachment of the shear layer, is presented. At elevated levels of free-stream turbulence, the flow field over the airfoil was noted to be considerably different whereby enhanced roll-up of the leading edge separated shear layer occurred. This resulted in the formation of large leading edge vortices which had a significant influence on the aerodynamic loads experienced by the airfoil. The surface pressures indicated that airfoil performance was higher under smooth flow conditions at lower angles of attack (&lt;10 deg). However an increase in turbulence resulted in a decrease of the lift-curve-slope, an increase in maximum lift, and significant delay in stall rendering airfoil performance to be greater at higher angles of attack. Turbulence had a relatively lower influence on the pressure drag experienced by the airfoil and the pitching moment coefficient was found to be sensitive to the ambient turbulence level only from angles of attack &gt;6 deg.
Magnetars, free precession, and superfluidity
2011-01-01

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation D. I. Jones, K. Glampedakis; Magnetars, free precession, and superfluidity. AIP Conf. Proc. 21 September 2011; 1379 (1): 23–26. https://doi.org/10.1063/1.3629479 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search
THE X(3872) AND OTHER X,Y,Z RESONANCES AS HIDDEN CHARM MESON-MESON MOLECULES
2011-01-01

We report on some ideas concerning the nature of the X(3872) resonance and the need for approximately equal charged and neutral components of [Formula: see text]. Then we discuss how some hidden charm states are obtained from the interaction between vector mesons with charm and can be associated to some of the charmonium-like X,Y,Z states. Finally we discuss how the nature of these states could be investigated through different types of radiative decay.
Low uniform versions of NC1.
2011-01-01

In the setting known as DLOGTIME-uniformity, the fundamental complexity classes AC ⊂ ACC ⊆ TC ⊆ NC have several robust characterizations. In this paper we refine uniformity further and examine the impact of these refinements on NC and its subclasses. When applied to the logarithmic circuit depth characterization of NC, some refinements leave NC unchanged while others collapse NC to NC. Thus we study refinements of other circuit characterizations of NC. In the case of the AC(A5) characterization of NC , where A5 is the NC-complete word problem of the group A5, our refinements collapse NC to a subset of the regular languages. For the AC(D+) characterizations of NC, where D+ is the NC-complete language capturing the formula value problem, interestingly, these refinements scale down to circuits with linear fan-in. In particular, the latter refinements bring to the fore two classes, denoted FO[<]-uniform AC(D+)LIN and FO[<]uniform TCLIN , whose separation may be within the reach of current lower bound techniques, and whose separation would amount to distinguishing the power of a MAJ gate from that of a D+ gate.
Magnetic Brain Activity Tracing the Perceived Speech Signal Regarding Envelope, Syllable Onsets, and Pitch Periodicity.
2011-01-01

Continuous speech evokes electrophysiological brain activity phase-locked to the speech envelope (ENV), resembling the N100 responses to single acoustic events. Using magnetoencophalography (MEG), the present study investigated further MEG components that directly reflect acoustic properties of continuous speech signals, i.e., a derivate of the envelope that can be taken as a physical marker of syllable onsets (SYL), and a pitch periodicity signal (PIT) obtained by bandpass filtering of the rectified speech signal. The participants (n = 10) listened to natural or formantsynthesized speech at a moderately fast or ultrafast speaking rate. As expected, the MEG crosscorrelation function with ENV showed a rightlateralized M100-like response with a source in the region of the central auditory system. Regarding the SYL derivate, in addition to auditory M50/M100-like responses a late, more anterior M50-like source component could be isolated. The cross-correlate of MEG data with the PIT derivate of the speech signal comprised multiple peaks of alternating polarity bound to a central-auditory source. The amplitude of the peaks in the crosscorrelation functions depended upon speech rate and signal type (natural versus synthetic).
A Note on the Optimality of (Even More) Incomplete Strict Liability
2011-01-01

This paper starts from the premise that liability is incomplete and establishes that firms may nevertheless invest excessively in care. This may justify a (further) reduction in the level of liability from a social standpoint, thereby arguing against seeking to approach full compensation as close as possible. In our framework, firms are liable under product liability, but also invest in care to prevent consumers' switching to competitors. Affecting the partition of consumers by means of care-taking is not desirable from a social standpoint. Consequently, it may be optimal to reduce liability below a given level of incomplete compensation in order to adjust firms' care incentives.
Dynare: Reference Manual Version 4
2011-01-01

Dynare is a software platform for handling a wide class of economic models, in particular dynamic stochastic general equilibrium (DSGE) and overlapping generations (OLG) models. The models solved by Dynare include those relying on the rational expectations hypothesis, wherein agents form their expectations about the future in a way consistent with the model. But Dynare is also able to handle models where expectations are formed differently: on one extreme, models where agents perfectly anticipate the future; on the other extreme, models where agents have limited rationality or imperfect knowledge of the state of the economy and, hence, form their expectations through a learning process. Dynare offers a user-friendly and intuitive way of describing these models. It is able to perform simulations of the model given a calibration of the model parameters and is also able to estimate these parameters given a dataset. Dynare is a free software, which means that it can be downloaded free of charge, that its source code is freely available, and that it can be used for both non-profit and for-profit purposes.
It takes two-skilled recognition of objects engages lateral areas in both hemispheres
2011-01-01

Our object recognition abilities, a direct product of our experience with objects, are fine-tuned to perfection.Left temporal and lateral areas along the dorsal, action related stream, as well as left infero-temporal areas along the ventral, object related stream are engaged in object recognition.Here we show that expertise modulates the activity of dorsal areas in the recognition of man-made objects with clearly specified functions.Expert chess players were faster than chess novices in identifying chess objects and their functional relations.Experts' advantage was domain-specific as there were no differences between groups in a control task featuring geometrical shapes.The pattern of eye movements supported the notion that experts' extensive knowledge about domain objects and their functions enabled superior recognition even when experts were not directly fixating the objects of interest.Functional magnetic resonance imaging (fMRI) related exclusively the areas along the dorsal stream to chess specific object recognition.Besides the commonly involved left temporal and parietal lateral brain areas, we found that only in experts homologous areas on the right hemisphere were also engaged in chess specific object recognition.Based on these results, we discuss whether skilled object recognition does not only involve a more efficient version of the processes found in non-skilled recognition, but also qualitatively different cognitive processes which engage additional brain areas.
Growth Effects of 19th Century Mass Migrations: “Fome Zero” for Brazil
2011-01-01

We estimate a long-run trend of Brazilian human capital that extends back to the very beginning of the 18th century. With new data on selective immigration during the era of mass migrations at the end of the 19th century, we show that human capital endowment of international migrants can induce effects on economic development that persist until today. According to our estimations, the effect of selective immigration on real GDP per capita in the year 2000 is significant and equals around 75 US $ overall. As a reference, this value equals the amount poor Brazilians get to supplement their subsistence in the Fome Zero (Zero Hunger) program. We argue that human capital formation is a highly path-dependent and persistent process.
EEG Alpha Spindles as Indicators for Prolonged Brake Reaction Time During Auditory Secondary Tasks in a Real Road Driving Study
2011-01-01

Driver distraction accounts for a substantial number of traffic accidents.Therefore, the impact of auditory secondary tasks on driving performance was examined.In addition to performance measures, i.e. reaction time on emergency brakings of a leading vehicle, mental driver states were described by electroencephalographic (EEG: alpha spindles, alpha band power) as well as cardiac activity (ECG: heart rate variability).Results show that brake reaction time (RT) increased with time-on-task during all conditions (p<.001), and was significantly higher while performing the secondary task (p<.001).Physiological measures showed similar effects.Alpha spindle rate, alpha band power as well as heart rate variability (HRV) increased with time-on-task and were significantly different during the secondary task, indicating inhibited visual information processing and reduced concentration ability.This study shows that reduced driving performance measured by means of prolonged brake reactions during increased cognitive load elicited by auditory secondary tasks is indicated by EEG measures as well as cardiac activity, enabling the direct quantification of driver distraction in experiments during real road driving.
Cryodynamics—The New Second Thermodynamics–Demonstrated Numerically
2011-01-01

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Otto E. Rössler, Frank Kuske; Cryodynamics—The New Second Thermodynamics–Demonstrated Numerically. AIP Conference Proceedings 22 September 2011; 1389 (1): 959–961. https://doi.org/10.1063/1.3637768 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search
The Planets around the post-Common Envelope Binary NN Serpentis
2011-01-01

We have detected 2 circumbinary planets around the close binary system NN Serpentis using the orbital time delay effect measured via the sharp eclipses of the white dwarf primary. The present pre-cataclysmic binary was formed when the original - 2 M primary expanded into a red giant, causing the secondary star to drop from its original orbit at a separation of about 1.4 A.U. down to its current separation at 0.0043 A.U. A quasi-adiabatic evolution of the circumbinary planets' orbits during the common-envelope phase would have placed them in unstable configurations, suggesting that they may have suffered significant orbital drag effects and were originally in much larger orbits. Alternatively, they may have been created as 2nd-generation planets during the last million years from the substantial amount of material lost during the creation of the binary, making them the youngest planets known. Either solution shows how little we actually understand about planetary formation.
Improvement of efficiency and safety in hospitals starts in the beginning of the planning phase and influences patient safety, staff, hygiene as well as logistics, and efficiency within the entire hospital.
2011-01-01

To increase patient safety and hospital efficiency a new stepwise planning methodology including an early peer review of the future design is shown in the article as well as innovative training concepts for hospital staff.
Exchange of Private Demand Information by Simultaneous Signaling
2011-01-01

As is well-known from the literature on oligopolistic competition with incomplete information, firms have an incentive to share private demand information. However, by assuming verifiability of demand data, these models ignore the possibility of strategic misinformation. We show that if firms can send misleading demand information, they will do so. Furthermore, we derive a costly signaling mechanism implementing demand revelation, even without verifiability. For the case of a gamma distribution of the firms' demand variables, we prove that the expected gross gains from information revelation exceed the expected cost of signaling if the skewness of the distribution is sufficiently large and the products are sufficiently differentiated.
Developments for coating, testing, and the alignment of CTA mirrors
2011-01-01

The telescopes of the Cherenkov Telescope Array (CTA) will have segmented mirrors, with mirror facets of ∼1-2.5 m area. In the framework of the CTA mirror work package, the Institute for Astronomy and Astrophysics in Tubingen (IAAT) is participating in the developments for procedures to coat glass-substrate based mirror facets, is preparing a mirror facet test facility, and is prototyping Active Mirror Control (AMC) alignment mechanics and electronics. The developments are based upon the experiences the group has gained through its participation in the preparations for the 27 m dish of H.E.S.S. phase II. We will present the current status of our work and plans for future developments. The devices and procedures will be relevant for all classes of telescopes that will finally form CTA.
Le Traité égypto-hittite de paix et d’alliance entre les rois Ramsès II et Khattouchili III (d’après l’inscription hiéroglyphique au temple de Karnak)*
2011-01-01

Abstract With the conquests of Tuthmosis III in Syria, Egypt entered into the international scene of the Near Eastern world. Thereafter, the Hittites were extending their frontiers across northern Mesopotamia and Syria. This led to conflict with Egypt, since each was aspiring to control the routes of international commerce. Inevitably, the two super-powers clashed at Qadesh, and the relationship between them remained full of hostility and distrust. True peace came only upon the conclusion of a treaty between Ramesses II and Khattouchili III, through which an extreme alliance was finally agreed. The treaty was an implicit recognition by both partners of a territorial status quo. Its conclusion was probably enhanced by the rising of the Assyrians and the infiltration of the Sea Peoples. Furthermore, the Hittite king was worried about his right to rule; his seizure of the throne left him concerned about the succession to his own family line. In this situation an accommodation with Ramesses II left Khattouchili in a more secure position. The treaty in the form of a pact between two powers of equal status is the oldest known one in history. Although previously translated and commented upon, this is the first such treatment in French.
Outer Hair Cells and Prestin—A Moderated Discussion
2011-01-01

A discussion moderated by the authors on the topic "Outer Hair Cells and Prestin" was held on 18 July 2011 at the 11th International Mechanics of Hearing Workshop in Williamstown, Massachusetts. The paper provides an edited transcript of the session.
The ghost propagator in Coulomb gauge
2011-01-01

We present results for a numerical study of the ghost propagator in Coulomb\\ngauge whereby lattice results for the spatial gluon propagator are used as\\ninput to solving the ghost Dyson-Schwinger equation. We show that in order to\\nsolve completely, the ghost equation must be supplemented by a boundary\\ncondition (the value of the inverse ghost propagator dressing function at zero\\nmomentum) which determines if the solution is critical (zero value for the\\nboundary condition) or subcritical (finite value). The various solutions\\nexhibit a characteristic behavior where all curves follow the same (critical)\\nsolution when going from high to low momenta until `forced' to freeze out in\\nthe infrared to the value of the boundary condition. The boundary condition can\\nbe interpreted in terms of the Gribov gauge-fixing ambiguity; we also\\ndemonstrate that this is not connected to the renormalization. Further, the\\nconnection to the temporal gluon propagator and the infrared slavery picture of\\nconfinement is discussed.\\n
Variational Approach to Yang-Mills Theory with non-Gaussian Wave Functionals
2011-01-01

A general method for treating non-Gaussian wave functionals in quantum field theory is presented and applied to the Hamiltonian approach to Yang-Mills theory in Coulomb gauge in order to include a three-gluon kernel in the exponential of the vacuum wave functional. The three-gluon vertex is calculated using the propagators found in the variational approach with a Gaussian trial wave functional as input.
When double is not twice as much
2011-01-01

Gene and genome duplications provide a playground for various selective pressures and contribute significantly to genome complexity. It is assumed that the genomes of all major eukaryotic lineages possess duplicated regions that result from gene and genome duplication. There is evidence that the model plant Arabidopsis has been subjected to at least three whole-genome duplication events over the last 150-200 million years. As a result, many cellular processes are governed by redundantly acting gene families. Plants pass through two distinct life phases with a haploid gametophytic alternating with a diploid sporophytic generation. This ontogenetic difference in gene copy number has important implications for the outcome of deleterious mutations, which are masked by the second gene copy in diploid systems but expressed in a dominant fashion in haploid organisms. As a consequence, maintaining the activity of duplicated genes might be particularly advantageous during the haploid gametophytic generation. Here, we describe the distinctive features associated with the alteration of generations and discuss how activity profiles of duplicated genes might get modulated in a life phase dependent fashion.
Nuclear structure, double beta decay and the neutrino mass
2011-01-01

The Quasi-particle Random Phase Approximation (QRPA), the Shell Model (SM), the angular momentum projected Hartee-Fock-Bogoliubov approach (HFB) and the Interacting Boson Model (IBM) are compared with each other for the determination the neurinoless double beta decay. The different approaches are compared specifically concerning the the angular momenta and parities of the neutron pairs, which are changed into two protons by the 0νββ-decay.
Phase-resolved spectroscopic study of the isolated neutron star RBS1223
2011-01-01

To constrain mass‐to‐radius ratio of the isolated neutron star RBS 1223, the phase resolved X‐ray spectroscopic analysis performed. A model with condensed iron surface and partially ionized hydrogen of highly magnetized thin atmosphere above it allowed to fit the observed spectra and the unprecedent broad absorption feature (at 0.3 keV, EW ∼150 eV⁠). It also lead to determine the parameters of two emitting areas, to constrain the geometry of them and the gravitational redshift (⁠gr∼0.16⁠) of RBS 1223.
Lattice studies of ground state wave functionals for Yang-Mills theory in Coulomb gauge
2011-01-01

Yang‐Mills theory in Coulomb gauge has the remarkable property that Gauss' law can be resolved exactly which allows to apply familiar concepts from quantum mechanics. However, the exact form of the vacuum wave functional is still unknown. We study Creutz ratios and low order Green functions of a discretised lattice version of two candidates for the vacuum wave functional: the infrared limit of the Greensite‐Olejnik approach (which amounts to a dimensionally reduced form of Yang‐Mills theory), and the Gaussian wave functional. In both cases, we also investigate the existence of center vortices and their influence on the infrared properties of the models. Our findings are compared with recent lattice data obtained in full Yang‐Mills theory.
A study of the optical parameters of plastic fiber-optic cables used in calibration systems of astroparticle physics experiments
2011-01-01

Results of studying the optical properties of plastic fiber-optic cables widely used in astroparticle physics experiments are presented. The absorption of nanosecond light pulses and light dispersion are studied. The influence of mechanical bends of the cables and photon’s launch angles on the transmission time and attenuation of light signals in these cables are also studied.