cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum gravity and cosmological observations
Creators: name: Bojowald, Martin
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum gravity places entirely new challenges on the formulation of a consistent theory as well as on an extraction of potentially observable effects. Quantum corrections due to the gravitational field are commonly expected to be tiny because of the smallness of the Planck length. However, a consistent formulation now shows that key features of quantum gravity imply magnification effects on correction terms which are especially important in cosmology with its long stretches of evolution. After a review of the salient features of recent canonical quantizations of gravity and their implications for the quantum structure of space-time a new example for potentially observable effects is given.
description: 8 pages, plenary talk at the VIth Latin American Symposium on High Energy Physics (Puerto Vallarta, Mexico, Nov. 2006)
O'ZGALAR MULKINI O'G'RILIK YO'LI BILAN TALON-TOROJ QILISHNING OB'EKTI VA PREDMETIGA DOIR MASALALAR
Creators: name: Xasanov, Temur
Publisher: name: Zenodo
Year: 2024

description: Mazkur maqolada o‘zgalar mulkini o‘g‘rilik yo‘li bilan talon-toroj qilishning ob’ekti va predmetiga doir masalalar tahlil etilgan. Bundan tashqari, maqolada o‘zgalar mulkini o‘g‘rilik yo‘li bilan talon-toroj qilishning ob’ekti va predmetining belgilariga doir olimlarning fikirlarini tahlil etgan.
Penalized log-likelihood estimation for partly linear transformation models with current status data
Creators: name: Ma, Shuangge
name: Kosorok, Michael R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G08, 60F05 (Primary) 62G20, 62B10 (Secondary)

description: We consider partly linear transformation models applied to current status data. The unknown quantities are the transformation function, a linear regression parameter and a nonparametric regression effect. It is shown that the penalized MLE for the regression parameter is asymptotically normal and efficient and converges at the parametric rate, although the penalized MLE for the transformation function and nonparametric regression effect are only $n^{1/3}$ consistent. Inference for the regression parameter based on a block jackknife is investigated. We also study computational issues and demonstrate the proposed methodology with a simulation study. The transformation models and partly linear regression terms, coupled with new estimation and inference techniques, provide flexible alternatives to the Cox model for current status data analysis.
description: Published at http://dx.doi.org/10.1214/009053605000000444 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Gravitational recoil from spinning binary black hole mergers
Creators: name: Herrmann, Frank
name: Hinder, Ian
name: Shoemaker, Deirdre
name: Laguna, Pablo
name: Matzner, Richard A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The inspiral and merger of binary black holes will likely involve black holes with both unequal masses and arbitrary spins. The gravitational radiation emitted by these binaries will carry angular as well as linear momentum. A net flux of emitted linear momentum implies that the black hole produced by the merger will experience a recoil or kick. Previous studies have focused on the recoil velocity from unequal mass, non-spinning binaries. We present results from simulations of equal mass but spinning black hole binaries and show how a significant gravitational recoil can also be obtained in these situations. We consider the case of black holes with opposite spins of magnitude $a$ aligned/anti-aligned with the orbital angular momentum, with $a$ the dimensionless spin parameters of the individual holes. For the initial setups under consideration, we find a recoil velocity of $V = 475 \KMS a$. Supermassive black hole mergers producing kicks of this magnitude could result in the ejection from the cores of dwarf galaxies of the final hole produced by the collision.
description: 8 pages, 8 figures, replaced with version accepted for publication in ApJ
The Klein-Gordon equation with the Kratzer potential in d dimensions
Creators: name: Saad, Nasser
name: Hall, Richard L.
name: Ciftci, Hakan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We apply the Asymptotic Iteration Method to obtain the bound-state energy spectrum for the d-dimensional Klein-Gordon equation with scalar S(r) and vector potentials V(r). When S(r) and V(r) are both Coulombic, we obtain all the exact solutions; when the potentials are both of Kratzer type, we obtain all the exact solutions for S(r)=V(r); if S(r) > V(r) we obtain exact solutions under certain constraints on the potential parameters: in this case, a possible general solution is found in terms of a monic polynomial, whose coefficients form a set of elementary symmetric polynomials.
description: 13 pages
Finanza e sostenibilità per le PMI
Creators: name: Locatelli, Rossella
name: Schena, Cristiana
Publisher: name: ----
Year: 2023
Subjects: finanza, credito, fintech, quotazione, sostenibilità, transizione climatica, pm

description: Le PMI italiane ed europee si caratterizzano per una strutturale dipendenza dal credito bancario e una generalmente limitata attenzione alle tematiche di gestione finanziaria. La produzione normativa recente e le innovazioni nel mercato finanziario introducono elementi di novità che, da un lato, dischiudono opportunità e, dall'altro, possono condizionare significativamente la disponibilità di credito e il suo costo. Le imprese che avranno meglio sviluppato percorsi evolutivi nella direzione della sostenibilità, in particolare sul fronte del contrasto al cambiamento climatico e che avranno migliorato la propria conoscenza delle tematiche finanziarie avranno in un futuro non lontano migliori condizioni di accesso al credito bancario e maggiori alternative di accesso ai mercati finanziari per il reperimento delle risorse.
description: ----, Vol 14, No 4 (2023): ISSUE 4/2023
Supplementary document for SOA-based reservoir computing using up-sampling - 7034422.pdf
Creators: name: Manuylovich, Egor
name: Bednyakova, Anastasia
name: Ivoilov, Dmitry
name: Terekhov, Ivan
name: Turitsyn, Sergei
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: supplementary materials
3D Bounding Box Detection in Volumetric Medical Image Data: A Systematic Literature Review
Creators: name: Kern, Daria
name: Mastmeyer, Andre
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper discusses current methods and trends for 3D bounding box detection in volumetric medical image data. For this purpose, an overview of relevant papers from recent years is given. 2D and 3D implementations are discussed and compared. Multiple identified approaches for localizing anatomical structures are presented. The results show that most research recently focuses on Deep Learning methods, such as Convolutional Neural Networks vs. methods with manual feature engineering, e.g. Random-Regression-Forests. An overview of bounding box detection options is presented and helps researchers to select the most promising approach for their target objects.
description: 10 pages, 5 figures, 1 table
Supplementary document for Fully planar solar-pumped fiber laser with 0.1% slope efficiency - 7190546.pdf
Creators: name: Endo, Masamori
name: Tomizawa, Ryota
name: Nagano, Tomoya
name: Hayashi, Koji
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Supplement 1
The Connection Between Barstrength and Circumnuclear Dust Structure
Creators: name: Peeples, Molly
name: Martini, Paul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a comparison of barstrength Qb and circumnuclear dust morphology for 75 galaxies in order to investigate how bars affect the centers of galaxies. We trace the circumnuclear dust morphology and amount of dust structure with structure maps generated from visible-wavelength HST data, finding that tightly wound nuclear dust spirals are primarily found in weakly barred galaxies. While strongly barred galaxies sometimes exhibit grand design structure within the central 10 percent of D25, this structure rarely extends to within ~10 pc of the galaxy nucleus. In some galaxies, these spiral arms terminate at a circumnuclear starburst ring. Galaxies with circumnuclear rings are generally more strongly barred than galaxies lacking rings. Within these rings, the dust structure is fairly smooth and usually in the form of a loosely wound spiral. These data demonstrate that multiple nuclear morphologies are possible in the most strongly barred galaxies: chaotic central dust structure inconsistent with a coherent nuclear spiral, a grand design spiral that loses coherence before reaching the nucleus, or a grand design spiral that ends in a circumnuclear ring. These observations may indicate that not all strong bars are equally efficient at fueling material to the centers of their host galaxies. Finally, we investigate the longstanding hypothesis that SB(s) galaxies have weak bars and SB(r) galaxies have strong bars, finding the opposite to be the case: namely, SB(r) galaxies are less strongly barred and have less dust structure than SB(s) galaxies. In general, more strongly barred galaxies tend to have higher nuclear dust contrast.
description: ApJ accepted; replacement is accepted version (no major changes). High resolution version available at http://www.astronomy.ohio-state.edu/~molly/astroph0606460.pdf and individual high resolution figures available at http://www.astronomy.ohio-state.edu/~molly/astroph0606460.html
Parlata naturale: Sante si presenta
Creators: name: Diomede, Sante
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: Barese language
subject: ita

description: Sante Diomede si presenta in barese (230702-006-bar-sd-arr-freespeech-intro) e in italiano (230702-007-ita-bar-sd-arr-freespeech-intro).

Sante Diomede introduces himself in Barese (230702-006-bar-sd-arr-freespeech-intro) and Italian (230702-007-ita-bar-sd-arr-freespeech-intro).
Supplementary document for Developing an efficient garnet-type near-infrared phosphor Na1.5Gd1.5Sc2Ge3O12:Cr3+ with relatively long-wavelength emission - 7220382.pdf
Creators: name: Li, Ying
name: Li, Chaojie
name: Li, Chao
name: Zhong, Jiyou
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Supplemental file
THE DEVELOPMENT AND VALIDATION OF SCALE FOR THE THREE LEVELS OF INTERCULTURAL AWARENESS
Creators: name: RUNYUAN CHUI
name: LUBNA ALI MOHAMMED
Publisher: name: Zenodo
Year: 2024
Subjects: Intercultural Awareness, Scale Development, EFL

description: Abstract

Background: The enhancement of global cooperation led to a significant focus on intercultural awareness within the field of English teaching in China. However, there is a lack of research on the evaluation of the three levels of intercultural awareness according to Baker's (2012) theory. Method: This study has undertaken a literature assessment concerning scales of intercultural awareness in order to provide a framework for constructing a scale including three levels of intercultural awareness. The construction of the intercultural awareness scale was first based on a thorough examination of existing material. Subsequently, adjustments have been made to the questionnaire based on the validation conducted by the expert group. Following the adjustment, a total of 274 students from a higher vocational college in Henan province, China, have completed the scale. The final draft of the scale has been amended based on the findings obtained from the SPSS analysis. Results: According to the findings of the SPSS analysis, the scale measuring the three levels of intercultural awareness demonstrates both validity and reliability. Additionally, the findings of the component analysis suggest that the three levels of intercultural awareness in the scale presented are reasonable. Furthermore, the evaluation findings of the structural model indicate that the three-level intercultural awareness model is deemed adequate. Conclusion: The present study aims to develop an intercultural awareness scale for students learning English as a foreign language (EFL), drawing upon the theoretical framework proposed by Will Baker. This research instrument will serve as a valuable tool for assessing students' intercultural awareness levels, thereby enhancing the effectiveness of English language education.
Chandra Multiwavelength Project X-ray Point Source Catalog
Creators: name: Kim, Minsun
name: Kim, Dong-Woo
name: Wilkes, Belinda J.
name: Green, Paul J.
name: Kim, Eunhyeuk
name: Anderson, Craig S.
name: Barkhouse, Wayne A.
name: Evans, Nancy R.
name: Ivezic, Zeljko
name: Karovska, Margarita
name: Kashyap, Vinay L.
name: Lee, Myung Gyoon
name: Maksym, Peter
name: Mossman, Amy E.
name: Silverman, John D.
name: Tananbaum, Harvey D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the Chandra Multiwavelength Project (ChaMP) X-ray point source catalog with ~6,800 X-ray sources detected in 149 Chandra observations covering \~10 deg^2. The full ChaMP catalog sample is seven times larger than the initial published ChaMP catalog. The exposure time of the fields in our sample ranges from 0.9 to 124 ksec, corresponding to a deepest X-ray flux limit of f_{0.5-8.0} = 9 x 10^{-16} erg/cm2/sec. The ChaMP X-ray data have been uniformly reduced and analyzed with ChaMP-specific pipelines, and then carefully validated by visual inspection. The ChaMP catalog includes X-ray photometric data in 8 different energy bands as well as X-ray spectral hardness ratios and colors. To best utilize the ChaMP catalog, we also present the source reliability, detection probability and positional uncertainty. To quantitatively assess those parameters, we performed extensive simulations. In particular, we present a set of empirical equations: the flux limit as a function of effective exposure time, and the positional uncertainty as a function of source counts and off axis angle. The false source detection rate is ~1% of all detected ChaMP sources, while the detection probability is better than ~95% for sources with counts >30 and off axis angle <5 arcmin. The typical positional offset between ChaMP X-ray source and their SDSS optical counterparts is 0.7+-0.4 arcsec, derived from ~900 matched sources.
description: 60 pages, 21 figures, accepted for publication in ApJS, Full resolution version is available at http://hea-www.cfa.harvard.edu/CHAMP/RESULTS_PAPERS/ChaMP_xcat.pdf
Phlaurocentrum Karsch 1889
Creators: name: Massa, Bruno
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Tettigoniidae
Phlaurocentrum

description: Genus Phlaurocentrum Karsch, 1889
The genus has been revised by Ragge (1962); later Massa (2013) described three further species and presently nine species are known; while all the species have been exhaustively described, only a very shortly description was provided for P. turbatum (Walker, 1869), its holotype being badly preserved and impossible to separate from other species. For this reason, Ragge (1964) proposed that it be considered as a nomen dubium, suspecting that some species subsequently described could be synonymous. Thus, in the present paper this species is not considered.
Table 1 lists all the known species of the genus Phlaurocentrum plus another two previously undescribed, one from the Republic of Congo and another from Côte d’Ivoire. P. morettoi Massa, 2013 is here considered synonymous with P. lobatum Ragge, 1962.
description: Published as part of Massa, Bruno, 2023, Biodiversity hotspot in the Sangha Trinational Protected Area revealed through Orthoptera Tettigoniidae, pp. 1-67 in Zootaxa 5331 (1) on page 27, DOI: 10.11646/zootaxa.5331.1.1, http://zenodo.org/record/8260962
ASSESSMENT OF THYROID DYSFUNCTION IN TYPE 2 DIABETES IN PATIENTS OF AL- NAJAF GOVERNORATE
Creators: name: Sarah Abbood Shanan
Publisher: name: Zenodo
Year: 2025

description: Thyroid dysfunction is increasing globally, and diabetes mellitus remains one of the most prevalent endocrine disorders. Thyroid hormones directly regulate insulin production and clearance, while thyroid dysfunction can affect both the hypothalamic regulation of TSH release and the peripheral conversion of T4 to T3, especially in diabetic patients. This study focuses on assessing thyroid dysfunction in individuals with type 2 diabetes mellitus in Al-Najaf province. Eighty participants were included in the study. Their levels of thyroid-stimulating hormone (TSH), total thyroxine (T4), and total triiodothyronine (T3) were measured to evaluate thyroid dysfunction. Plasma glucose levels were quantified using the GOD-POD method, and thyroid profiles were determined using chemiluminescence immunoassay (CLIA) technology. Statistical analysis was performed using SPSS version 20, employing unpaired T-tests and Pearson's correlation. The study found that among the type 2 diabetes patients, there were 4 cases of hypothyroidism (10.0%), 6 cases of subclinical hypothyroidism (15.0%), 0 cases of subclinical hyperthyroidism (0.0%), and 1 case of hyperthyroidism (2.5%). In contrast, among healthy individuals without diabetes, the prevalence of hypothyroidism was 1 (2.5%), subclinical hypothyroidism was 3 (7.5%), while hyperthyroidism and subclinical hyperthyroidism were both 0 (0.0%). The findings indicate that thyroid dysfunction is more common in individuals with type 2 diabetes mellitus than in those without the disease.
Simulating the Emission and Outflows from Accretion Disks
Creators: name: Noble, Scott C.
name: Leung, Po Kin
name: Gammie, Charles F.
name: Book, Laura G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The radio source Sagittarius A* (Sgr A*) is believed to be a hot, inhomogeneous, magnetized plasma flowing near the event horizon of the 3 million solar mass black hole at the galactic center. At a distance of 8000 parsecs the black hole would be among the largest black holes as judged by angular size. Recent observations are consistent with the idea that the millimeter and sub-millimeter photons are dominated by optically thin, thermal synchrotron emission. Anticipating future Very Long Baseline Interferometry (VLBI) observations of Sgr A* at these wavelengths, we present here the first dynamically self-consistent models of millimeter and sub-millimeter emission from Sgr A* based on general relativistic numerical simulations of the accretion flow. Angle-dependent spectra are calculated assuming a thermal distribution of electrons at the baryonic temperature dictated by the simulation and the accretion rate, which acts as a free parameter in our model. The effects of varying model parameters (black hole spin and inclination of the spin to the line of sight) and source variability on the spectrum are shown. We find that the accretion rate value needed to match our calculated millimeter flux to the observed flux is consistent with constraints on the accretion rate inferred from detections of the rotation measure. We also describe the relativistic jet that is launched along the black hole spin axis by the accretion disk and evolves to scales of 1000 gravitational radii.
description: 17 pages, 6 color Postscript figures, uses IOP style files, to be published in the special issue of Classical and Quantum Gravity based on the New Frontiers in Numerical Relativity conference, AEI Golm, Germany, July 2006
First constraints on the AGN X-ray luminosity function at $z \sim 6$ from an eROSITA-detected quasar
Creators: name: Wolf, Julien
name: Nandra, Kirpal
name: Salvato, Mara
name: Liu, Teng
name: Buchner, Johannes
name: Brusa, Marcella
name: Hoang, Duy N.
name: Moss, Vanessa
name: Arcodia, Riccardo
name: Brüggen, Marcus
name: Comparat, Johan
name: de Gasperin, Francesco
name: Georgakakis, Antonis
name: Hotan, Aidan
name: Lamer, Georg
name: Merloni, Andrea
name: Rau, Arne
name: Rottgering, Huub J. A.
name: Shimwell, Timothy W.
name: Urrutia, Tanya
name: Whiting, Matthew
name: Williams, Wendy L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We searched for high-z quasars within the X-ray source population detected in the contiguous $\sim 140^2$ eFEDS field observed by eROSITA during the performance verification phase. We collected the available spectroscopic information in the field, including the sample of all currently known optically selected z>5.5 quasars and cross-matched secure Legacy DR8 counterparts of eROSITA-detected X-ray point-like sources with this spectroscopic sample. We report the X-ray detection of an eROSITA source securely matched to the well-known quasar SDSS J083643.85+005453.3 (z=5.81). The soft X-ray flux of the source derived from eROSITA is consistent with previous Chandra observations. In addition, we report the detection of the quasar with LOFAR at 145 MHz and ASKAP at 888 MHz. The reported flux densities confirm a spectral flattening at lower frequencies in the emission of the radio core, indicating that the quasar could be a (sub-) gigahertz peaked spectrum source. The inferred spectral shape and the parsec-scale radio morphology of SDSS J083643.85+005453.3 suggest that it is in an early stage of its evolution into a large-scale radio source or confined in a dense environment. We find no indications for a strong jet contribution to the X-ray emission of the quasar, which is therefore likely to be linked to accretion processes. The detection of this source allows us to place the first constraints on the XLF at z>5.5 based on a secure spectroscopic redshift. Compared to extrapolations from lower-redshift observations, this favours a relatively flat slope for the XLF at $z\sim 6$ beyond $L_*$. The population of X-ray luminous AGNs at high redshift may be larger than previously thought. From our XLF constraints, we make the conservative prediction that eROSITA will detect $\sim 90$ X-ray luminous AGNs at redshifts 5.7
Stringent Search for Precursor Emission in Short GRBs from Fermi/GBM data and Physical Implications
Creators: name: Wang, Jie-Shuang
name: Peng, Zong-Kai
name: Zou, Jin-Hang
name: Zhang, Bin-Bin
name: Zhang, Bing
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We perform a stringent search for precursor emission of short gamma-ray bursts (SGRBs) from the Fermi/GBM data and find 16 precursor events with $\gtrsim4.5σ$ significance. We find that the durations of the main SGRB emission ($T_{\rm GRB}$) and the precursor emission ($T_{\rm pre}$), as well as the waiting time ($T_{\rm wt}$) in between, are roughly comparable to each other, with $T_{\rm wt}\approx2.8T_{\rm GRB}^{1.2}$ approximately satisfied for most cases except one significant outlier. We also perform spectral analyses to the precursors and SGRBs, and find that the spectra of precursor emission can be fitted with the blackbody, non-thermal cutoff power law and/or power law models. We consider several possible models for precursor emission in SGRBs and find that the luminosity and spectral shape may be explained by the the shock breakout or the photospheric radiation of a fireball launched after the merger for thermal precursors, or magnetospheric interaction between two NSs prior to the merger for non-thermal precursors. For the fireball photospheric model, a matter-dominated jet is preferred and a constraint on the fireball Lorentz factor can be placed as $Γ\sim30$. For the magnetospheric interaction model, jet launching mechanism may be constrained. In particular, those events with $T_{\rm wt}/T_{\rm GRB}\gg1$ (e.g. GRB191221802) require the formation of a supramassive or stable neutron star after the merger, with the delay time defined by the timescale for an initially baryon-loaded jet to become magnetically dominated and relativistic.
description: 11 pages, 5 figures, and 1 table. To appear in ApJL
The Simple Non-degenerate Relativistic Gas: Statistical Properties and Brownian Motion
Creators: name: Sandoval-Villalbazo, A.
name: Aragones-Munoz, A.
name: Garcia-Perciante, A. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper shows a novel calculation of the mean square displacement of a classical Brownian particle in a relativistic thermal bath. The result is compared with the expressions obtained by other authors. Also, the thermodynamic properties of a non-degenerate simple relativistic gas are reviewed in terms of a treatment performed in velocity space.
description: 6 pages, 2 figures
Introductory Learning Card for Research Integrity (What happened at LONA Science Centre?)
Creators: name: Priess-Buchheit, Julia
name: Häberlein, Lisa
name: Bourgeois-Doyle, Dick
Publisher: name: Zenodo
Year: 2019
Subjects: Research Integrity, LONA Science Centre

description: What happened at LONA Science Centre?, is accompanying learning material for the Path2Integrity learning cards. The story supports the learning progress to foster Research Integrity.
description: Funded by the European Commission, Grant Number 824488
Dark matter, electroweak phase transition and gravitational wave in the type-II two-Higgs-doublet model with a singlet scalar field
Creators: name: Han, Xiao-Fang
name: Wang, Lei
name: Zhang, Yang
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the framework of type-II two-Higgs-doublet model with a singlet scalar dark matter $S$, we study the dark matter observables, the electroweak phase transition, and the gravitational wave signals by such strongly first order phase transition after imposing the constraints of the LHC Higgs data. We take the heavy CP-even Higgs $H$ as the only portal between the dark matter and SM sectors, and find the LHC Higgs data and dark matter observables require $m_S$ and $m_H$ to be larger than 130 GeV and 360 GeV for $m_A=600$ GeV in the case of the 125 GeV Higgs with the SM-like coupling. Next, we carve out some parameter space where a strongly first order electroweak phase transition can be achieved, and find benchmark points for which the amplitudes of gravitational wave spectra reach the sensitivities of the future gravitational wave detectors.
description: 30 pages, 8 figures, 3 tables; references added in v2
An investigation of leverage, contrarian overextrapolation and the p/e effect
Creators: name: Hochachka, Eugene A.
Publisher: name: University of British Columbia
Year: 2009

description: The most common explanation for the superior returns of undervalued stocks is that market extrapolation of recent results too far into the future results in profitable opportunities for those "contrarian" investors who take advantage of the market's mistake before it corrects itself. An opposing view is that because a security's price impounds expected returns, those stocks which are riskier and will therefore be accorded high discount rates should ceteris paribus appear to be undervalued, and should thus exhibit positive excess returns over most periods. We review the evidence for both arguments and then test whether various types of leverage are priced, in the belief that leverage risk may be a factor behind the excess-returns of undervalued stocks. We find only weak evidence that leverage risk is priced, and it is clearly not priced sufficiently to be a causal factor in value-investing. We then focus our attention on a dataset in which the contrarian explanation does not hold because share price and cashflow have moved opposite to one another from previous periods, whereas for the contrarian explanation to hold price must move in the same direction as cashflows but by too much. We find the value-investing effect to be just as strong in the non-contrarian subsets as in the universe of all firms and thus conclude that the effect is not contrarian in nature but is instead consistent with market rationality, where myriad forms of risk are initially reflected in firm price and are eventually reflected in realized returns.
Chandra Observations of Candidate "True" Seyfert 2 Nuclei
Creators: name: Ghosh, Himel
name: Pogge, Richard W.
name: Mathur, Smita
name: Martini, Paul
name: Shields, Joseph C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Unification Model for active galactic nuclei posits that Seyfert 2s are intrinsically like Seyfert 1s, but that their broad-line regions (BLRs) are hidden from our view. A Seyfert 2 nucleus that truly lacked a BLR, instead of simply having it hidden, would be a so-called "true" Seyfert 2. No object has as yet been conclusively proven to be one. We present a detailed analysis of four of the best "true" Seyfert 2 candidates discovered to date: IC 3639, NGC 3982, NGC 5283, and NGC 5427. None of the four has a broad H-alpha emission line, either in direct or polarized light. All four have rich, high-excitation spectra, blue continua, and Hubble Space Telescope (HST) images showing them to be unresolved sources with no host-galaxy obscuration. To check for possible obscuration on scales smaller than that resolvable by HST, we obtained X-ray observations using the Chandra X-ray Observatory. All four objects show evidence of obscuration and therefore could have hidden BLRs. The picture that emerges is of moderate to high, but not necessarily Compton-thick, obscuration of the nucleus, with extra-nuclear soft emission extended on the hundreds-of-parsecs scale that may originate in the narrow-line region. Since the extended soft emission compensates, in part, for the nuclear soft emission lost to absorption, both absorption and luminosity are likely to be severely underestimated unless the X-ray spectrum is of sufficient quality to distinguish the two components. This is of special concern where the source is too faint to produce a large number of counts, or where the source is too far away to resolve the extended soft X-ray emitting region.
description: 26 pages, 12 figures, submitted to ApJ
Recitazione teatrale: Giugliètte e Romè
Creators: name: De Santis, Gigi
name: Giovine, Felice
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Barese language

description: Felice Giovine e Gigi De Santis recitano un astratto dal adattamento di "Giulietta e Romeo" in lingua barese. Adattamento, riduzione e regia da Francesco Brollo; traduzione in lingua barese da Felice Giovine.

Felice Giovine and Gigi De Santis recite an excerpt from the Barese adaptation of "Romeo and Juliette". Adaptation, abridgment, and direction by Francesco Brollo; translation into Barese by Felice Giovine.
HUBS: A dedicated hot circumgalactic medium explorer
Creators: name: Cui, Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Hot Universe Baryon Surveyor (HUBS) mission is proposed to study "missing" baryons in the universe. Unlike dark matter, baryonic matter is made of elements in the periodic table, and can be directly observed through the electromagnetic signals that it produces. Stars contain only a tiny fraction of the baryonic matter known to be present in the universe. Additional baryons are found to be in diffuse (gaseous) form, in or between galaxies, but a significant fraction has not yet been seen. The latter (missing baryons) are thought to be hiding in low-density warm-hot ionized medium (WHIM), based on results from theoretical studies and recent observations, and be distributed in the vicinity of galaxies (i.e., circum-galactic medium) and between galaxies (i.e., intergalactic medium). Such gas would radiate mainly in the soft X-ray band and the emission would be very weak, due to its very low density. HUBS is optimized to detect the X-ray emission from the hot baryons in the circum-galactic medium, and thus fill a void in observational astronomy. The goal is not only to detect the missing baryons, but to characterize their physical and chemical properties, as well as to measure their spatial distribution. The results would establish the boundary conditions for understanding galaxy evolution. Though highly challenging, detecting missing baryons in the intergalactic medium could be attempted, perhaps in the outskirts of galaxy clusters, and could shed significant light on the large-scale structures of the universe. The current design of HUBS will be presented, along with the status of technology development.
description: 12 pages, 7 figures, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, eds. J.A. den Herder, S. Nikzad, & K. Nakazawa, Proc. of SPIE Vol. 11444, 114442S
Asymptotic normality of the $L_k$-error of the Grenander estimator
Creators: name: Kulikov, Vladimir N.
name: Lopuhaä, Hendrik P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62E20, 62G07 (Primary) 62G20 (Secondary)

description: We investigate the limit behavior of the $L_k$-distance between a decreasing density $f$ and its nonparametric maximum likelihood estimator $\hat{f}_n$ for $k\geq1$. Due to the inconsistency of $\hat{f}_n$ at zero, the case $k=2.5$ turns out to be a kind of transition point. We extend asymptotic normality of the $L_1$-distance to the $L_k$-distance for $1\leq k<2.5$, and obtain the analogous limiting result for a modification of the $L_k$-distance for $k\geq2.5$. Since the $L_1$-distance is the area between $f$ and $\hat{f}_n$, which is also the area between the inverse $g$ of $f$ and the more tractable inverse $U_n$ of $\hat{f}_n$, the problem can be reduced immediately to deriving asymptotic normality of the $L_1$-distance between $U_n$ and $g$. Although we lose this easy correspondence for $k>1$, we show that the $L_k$-distance between $f$ and $\hat{f}_n$ is asymptotically equivalent to the $L_k$-distance between $U_n$ and $g$.
description: Published at http://dx.doi.org/10.1214/009053605000000462 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
O'ZGALAR MULKINI O'G'RILIK YO'LI BILAN TALON-TOROJ QILISHNING OB'EKTIV TOMONI VA UNING O'ZIGA XOS BELGILARI
Creators: name: Xasanov, Temur
Publisher: name: Zenodo
Year: 2024

description: Mazkur maqolada o‘zgalar mulkini o‘g‘rilik yo‘li bilan talon-toroj qilishning ob’ektiv tomoni va uning o‘ziga xos belgilariga doir masalalar tahlil etilgan. Bundan tashqari, maqolada o‘zgalar mulkini o‘g‘rilik yo‘li bilan talon-toroj qilishning ob’ektiv tomonining zaruriy va fakultatev belgilariga doir olimlarning fikirlarini tahlil etgan.
Chandra Multiwavelength Project X-ray Point Source Number Counts and the Cosmic X-ray Background
Creators: name: Kim, Minsun
name: Wilkes, Belinda J.
name: Kim, Dong-Woo
name: Green, Paul J.
name: Barkhouse, Wayne A.
name: Lee, Myung Gyoon
name: Silverman, John D.
name: Tananbaum, Harvey D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the Chandra Multiwavelength Project (ChaMP) X-ray point source number counts and the cosmic X-ray background (CXRB) flux densities in multiple energy bands. From the ChaMP X-ray point source catalog, ~5,500 sources are selected covering 9.6 deg^2 in sky area. To quantitatively characterize the sensitivity and completeness of the ChaMP sample, we perform extensive simulations. We also include the ChaMP+CDFs (Chandra Deep Fields) number counts to cover large flux ranges from 2x10^{-17} to 2.4x10^{-12} (0.5-2 keV) and from 2x10^{-16} to 7.1x10^{-12} (2-8 keV) erg/cm^2/sec. The ChaMP and the ChaMP+CDFs differential number counts are well fitted with a broken power law. The best fit faint and bright power indices are 1.49^{+0.02}_{-0.02} and 2.36^{+0.05}_{-0.05} (0.5-2 keV), and 1.58^{+0.01}_{-0.01} and 2.59^{+0.06}_{-0.05} (2-8 keV), respectively. We detect breaks in the differential number counts and they appear at different fluxes in different energy bands. Assuming a single power law model for a source spectrum, we find that the same population(s) of soft X-ray sources causes the break in the differential number counts for all energy bands. We measure the resolved CXRB flux densities from the ChaMP and the ChaMP+CDFs number counts with and without bright target sources. Adding the known unresolved CXRB to the ChaMP+CDF resolved CXRB, we also estimate total CXRB flux densities. The fractions of the resolved CXRB without target sources are 78^{+1}_{-1}% and 81^{+2}_{-2}% in the 0.5-2 keV and 2-8 keV bands, respectively, somewhat lower, though generally consistent with earlier numbers since their large errors. These fractions increase by ~1% when target sources are included.
description: 54 pages, 21 figures, accepted for publication in ApJ, Full resolution version is available at http://hea-www.cfa.harvard.edu/CHAMP/RESULTS_PAPERS/ChaMP_ncounts.pdf
Typing Services
Creators: name: Minervini, Massimo
Publisher: name: IMT Alti Studi Lucca
Year: 2015
Subjects: QA75 Electronic computers. Computer science

description: Plant phenotyping investigates how a plant’s genome, interacting with the environment, affects the phenome (i.e. the observable traits of a plant). Quantitative assessment of phenotypes is central to our quest towards efficient and sustainable agriculture. Image-based approaches to plant phenotyping are gaining momentum and, on par with growing scientific and commercial interest, exciting computer vision problems arise. Currently available solutions for image-based plant phenotyping are either destructive and low-throughput or high-throughput and costly. We propose an affordable solution based on a distributed sensing and analysis framework. Time-lapse sequences of the scene are acquired by affordable sensors (as such, they will have limited computational power and knowledge access). The images are transmitted to the cloud, where high computational resources permit the extraction of fine-grained phenotypic information. For the automated analysis of such images, we develop a multi-channel active contour segmentation with probabilistic priors on plant appearance. To validate our approach we collect two image datasets of growing Arabidopsis plants, portions of which are manually annotated and publicly released. However, the transmission of large volumes of image data necessitates compression to meet bandwidth constraints. After demonstrating that lossy image compression does affect vision-based measurement of plant traits and can jeopardize phenotypic analyses, we investigate application-aware compression strategies on resource-constrained devices to reduce transmission and storage cost of the acquired images without compromising analysis accuracy. The possibility of sharing information between sensor and receiver is exploited: the receiver feeds back to the sensor information to optimize image compression. We inject application knowledge at different levels of the lossy encoding process. The sensor estimates regions of interest within an image and applies different levels of compression to foreground (plants) and background. We also save bits in color representation, using an orthogonal transform with class separation capabilities obtained with supervised learning. Finally, we investigate application-aware distortion metrics for pixel-level classification accuracy, and their implementation in the rate control algorithm of the High Efficiency Video Coding (HEVC) standard. We hope with such an affordable solution to increase adoption of image-based approaches to plant phenotyping by small labs and breeders, and also in developing countries, in pursuance of the democratization of science and technology.
Laser fragmentation of Aluminum nanoparticles in liquid isopropanol
Creators: name: Smirnov, Valery V.
name: Zhilnikova1, Margarita I.
name: Barmina, Ekaterina V.
name: Shafeev, Georgy A.
name: Kobtsev, Vitaly D.
name: Kostritsa, Sergey A.
name: Pridvorova, Svetlana M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Laser fragmentation of Al nanoparticles in liquid isopropanol is experimentally studied. Nanoparticles are characterized by Transmission Electron Microscopy and measuring disk centrifuge. As the result, the size of Al nanoparticles is reduced from more than 100 nm down to 10 nm. These nanoparticles are considered as additives to liquid hydrocarbon fuels.
Comments on Marginal Deformations in Open String Field Theory
Creators: name: Schnabl, Martin
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this short letter we present a class of remarkably simple solutions to Witten's open string field theory that describe marginal deformations of the underlying boundary conformal field theory. The solutions we consider correspond to dimension-one matter primary operators that have non-singular operator products with themselves. We briefly discuss application to rolling tachyons.
description: 13 pages
Analytic Solutions for Marginal Deformations in Open String Field Theory
Creators: name: Kiermaier, Michael
name: Okawa, Yuji
name: Rastelli, Leonardo
name: Zwiebach, Barton
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a calculable analytic approach to marginal deformations in open string field theory using wedge states with operator insertions. For marginal operators with regular operator products, we construct analytic solutions to all orders in the deformation parameter. In particular, we construct an exact time-dependent solution that describes D-brane decay and incorporates all alpha' corrections. For marginal operators with singular operator products, we construct solutions by regularizing the singularity and adding counterterms. We explicitly carry out the procedure to third order in the deformation parameter.
description: 34 pages, LaTeX2e, 1 figure; v2: minor corrections, version published in JHEP
The dimension of Diffusion Limited Aggregates grown on a line
Creators: name: Procaccia, Eviatar B.
name: Procaccia, Itamar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Diffusion Limited Aggregation (DLA) has served for forty years as a paradigmatic example for the creation of fractal growth patterns. In spite of thousands of references no exact result for the fractal dimension $D$ of DLA is known. In this Letter we announce an exact result for off-lattice DLA grown on a line, $D=3/2$. The result relies on representing DLA with iterated conformal maps, allowing one to prove self-affinity, a proper scaling limit and a well defined fractal dimension. Mathematical proofs of the main results are available in arXiv:2008.05792.
description: 4 pages 4 figures
Storia: La stòrie de Mìinze Cule
Creators: name: De Santis, Gigi
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Barese language

description: Gigi De Santis legge una storia dal libro, "Le Stòrie de Nononne Iangelìne", scritto da Alfredo Giovine.

Gigi De Santis reads a story from the book, "Le Stòrie de Nononne Iangelìne", written by Alfredo Giovine.
Entanglement of formation and monogamy of multi-party quantum entanglement
Creators: name: Kim, Jeong San
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We provide a sufficient condition for the monogamy inequality of multi-party quantum entanglement of arbitrary dimensions in terms of entanglement of formation. Based on the classical-classical-quantum(ccq) states whose quantum parts are obtained from the two-party reduced density matrices of a three-party quantum state, we show the additivity of the mutual information of the ccq states guarantees the monogamy inequality of the three-party pure state in terms of EoF. After illustrating the result with some examples, we generalize our result of three-party systems into any multi-party systems of arbitrary dimensions.
description: 18 pages, no figure, to appear in Scientific Reports
Correcting low-frequency noise with continuous measurement
Creators: name: Tian, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Low-frequency noise presents a serious source of decoherence in solid-state qubits. When combined with a continuous weak measurement of the eigenstates, the low-frequency noise induces a second-order relaxation between the qubit states. Here we show that the relaxation provides a unique approach to calibrate the low-frequency noise in the time-domain. By encoding one qubit with two physical qubits that are alternatively calibrated, quantum logic gates with high fidelity can be performed.
description: 10 pages, 3 figures, submitted
On the Temporality of Priors in Entity Linking
Creators: name: Joao, Renato Stoffalette
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Entity linking is a fundamental task in natural language processing which deals with the lexical ambiguity in texts. An important component in entity linking approaches is the mention-to-entity prior probability. Even though there is a large number of works in entity linking, the existing approaches do not explicitly consider the time aspect, specifically the temporality of an entity's prior probability. We posit that this prior probability is temporal in nature and affects the performance of entity linking systems. In this paper we systematically study the effect of the prior on the entity linking performance over the temporal validity of both texts and KBs.