cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Classification of integrable hydrodynamic chains
Creators: name: Odesskii, A.
name: Sokolov, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Using the method of hydrodynamic reductions, we find all integrable infinite (1+1)-dimensional hydrodynamic-type chains of shift one. A class of integrable infinite (2+1)-dimensional hydrodynamic-type chains is constructed.
description: 20 pages, latex
Improved calculation of the $γ^*γ\rightarrow π$ process at low $Q^2$ using LCSR's and renormalization-group summation
Creators: name: Mikhailov, Sergey
name: Pimikov, Alexandr
name: Stefanis, N. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study two versions of lightcone sum rules to calculate the $γ^*γ\rightarrowπ^0$ transition form factor (TFF) within QCD. While the standard version is based on fixed-order perturbation theory by means of a power-series expansion in the strong coupling, the new method incorporates radiative corrections by renormalization-group summation and generates an expansion within a generalized fractional analytic perturbation theory involving only analytic couplings. Using this scheme, we determine the relative nonperturbative parameters and the first two Gegenbauer coefficients of the pion distribution amplitude (DA) to obtain TFF predictions in good agreement with the preliminary BESIII data, while the best-fit pion DA satisfies the most recent lattice constraints on the second moment of the pion DA at the three-loop level.
description: 8 pages, 3 figures. Work dedicated to the memory of Maxim Polyakov, a deeply admired colleague and friend of ours. Presented at Virtual Tribute to Quark Confinement and the Hadron Spectrum, August 2nd-6th, 2021
Pressure Tuning of an Ionic Insulator into a Heavy Electron Metal: An Infrared Study of YbS
Creators: name: Matsunami, M.
name: Okamura, H.
name: Ochiai, A.
name: Nanba, T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Optical conductivity [$σ(ω)$] of YbS has been measured under pressure up to 20 GPa. Below 8 GPa, $σ(ω)$ is low since YbS is an insulator with an energy gap between fully occupied 4$f$ state and unoccupied conduction ($c$) band. Above 8 GPa, however, $σ(ω)$ increases dramatically, developing a Drude component due to heavy carriers and characteristic infrared peaks. It is shown that increasing pressure has caused an energy overlap and hybridization between the $c$ band and 4$f$ state, thus driving the initially ionic and insulating YbS into a correlated metal with heavy carriers.
Elliptic Curves with Missing Frobenius Traces
Creators: name: Vissuet, Kevin
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Let $E$ be an elliptic curve defined over $\mbq$. In 1976, Lang and Trotter conjectured an asymptotic formula for the number $\pi_{E,r}(X)$ of primes $p \leq X$ of good reduction for which the Frobenius trace at $p$ associated to $E$ is equal to a given fixed integer $r$. We investigate elliptic curves $E$ over $\mbq$ that have a missing Frobenius trace, i.e. for which the counting function $\pi_{E,r}(X)$ remains bounded as $X \rightarrow \infty$, for some $r \in \mbz$. In particular, we classify all elliptic curves $E$ over $\mbq(t)$ that have a missing Frobenius trace.
It Is Different When Items Are Older: Debiasing Recommendations When Selection Bias and User Preferences Are Dynamic
Creators: name: Huang, Jin
name: Oosterhuis, Harrie
name: de Rijke, Maarten
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: User interactions with recommender systems (RSs) are affected by user selection bias, e.g., users are more likely to rate popular items (popularity bias) or items that they expect to enjoy beforehand (positivity bias). Methods exist for mitigating the effects of selection bias in user ratings on the evaluation and optimization of RSs. However, these methods treat selection bias as static, despite the fact that the popularity of an item may change drastically over time and the fact that user preferences may also change over time. We focus on the age of an item and its effect on selection bias and user preferences. Our experimental analysis reveals that the rating behavior of users on the MovieLens dataset is better captured by methods that consider effects from the age of item on bias and preferences. We theoretically show that in a dynamic scenario in which both the selection bias and user preferences are dynamic, existing debiasing methods are no longer unbiased. To address this limitation, we introduce DebiAsing in the dyNamiC scEnaRio (DANCER), a novel debiasing method that extends the inverse propensity scoring debiasing method to account for dynamic selection bias and user preferences. Our experimental results indicate that DANCER improves rating prediction performance compared to debiasing methods that incorrectly assume that selection bias is static in a dynamic scenario. To the best of our knowledge, DANCER is the first debiasing method that accounts for dynamic selection bias and user preferences in RSs.
description: WSDM 2022
Lattice refinement in loop quantum cosmology
Creators: name: Sakellariadou, Mairi
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Lattice refinement in LQC, its meaning and its necessity are discussed. The rôle of lattice refinement for the realisation of a successful inflationary model is explicitly shown. A simple and effective numerical technique to solve the constraint equation for any choice of lattice refinement model is briefly illustrated. Phenomenological and consistency requirements leading to a particular choice of lattice refinement model are presented, while it is subsequently proved that only this choice of lattice refinement leads to a unique factor ordering in the Wheeler-De Witt equation, which is the continuum limit of LQC.
description: 17 pages, 1 figure, to appear in the Proceedings of "Recent Developments in Gravity-NEB XIII"; Thessaloniki (Greece), June 2008
title: Características y formas de presentación del aneurisma inflamatorio de aorta abdominal.
Creators: name: Galache Osuna, Cristina
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Inflammation
subject: Aneurysms
subject: Diagnostic procedure
subject: Complications
subject: Ultrasound
subject: CT
subject: Abdomen
subject: Arteries / Aorta

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
El aneurisma aortico inflamatorio AAI es una entidad clínica descrita por primera vez en 1972 por Walker y presenta unas características que le diferencian del aneurisma arterioesclerotico AA tanto en la clínica,
edad de...
Understanding barriers and facilitators to accessing IAPT for people on low incomes.
Creators: name: Melissourgaki, Zaneta-Eleni
Publisher: name: University of East London
Year: 2023
Subjects: IAPT
access inequalities
IMD
socio-economic deprivation

description: Low-income communities have a poorer experience of care in Improving Access to Psychological Therapies (IAPT) services. This study explored: a) how IAPT referral and treatment rates have changed for people on low incomes after Covid-19 (Study 1); b) barriers people on low incomes face in accessing IAPT and what could facilitate access (Study 2). The study thus comprised two parts. Study 1 used national data on IAPT referrals received during 2018-2022 (N = 6,544,536). The treatment access rate, access gap and completion rate were calculated for each socio-economic group, separately for each year. Outcomes between those most and least deprived were compared using chi-square tests. Associations between time of measurement (pre/post-pandemic), level of deprivation and treatment access or completion were explored using log-linear analyses. Study 2 involved semi-structured interviews with people on low incomes who had not accessed IAPT (N = 5). Data were analysed using Thematic Analysis. Study 1 suggested that IAPT referrals decreased during Covid-19, but more so for the most deprived group; referrals exceeded pre-pandemic levels in 2021-2022. Treatment access and completion improved during Covid-19, however the most deprived group benefited less. The gap between those most and least deprived has widened after Covid-19 regarding treatment access and completion. Study 2 identified three themes: 1) Navigating the system; 2) Us and Them; 3) Perceived mismatch between needs and available support. The findings of the two studies are discussed separately and in conjunction, with reference to the literature on IAPT and the experiences of people on low incomes in psychological services. It is argued that IAPT services need to attend to the socio-economic context within which mental health difficulties occur and consider their relevance for low-income communities, given the number of low-income individuals who do not access the service and widening inequalities in treatment access and completion following Covid-19.
title: Hallazgos radiológicos en TCMD de los linfomas extranodales abdominopélvicos
Creators: name: Martínez Fernández, Teresa
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Lymphoma
subject: eLearning
subject: CT
subject: Abdomen

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Describir e ilustrar las diversas manifestaciones radiológicas en TCMD en la región abdominopélvica de los linfomas...
The role of silver addition on the structural and superconducting properties of polycrystalline Sr0.6K0.4Fe2As2
Creators: name: Wang, Lei
name: Qi, Yanpeng
name: Zhang, Xianping
name: Gao, Zhaoshun
name: Wang, Dongliang
name: Ma, Yanwei
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The effect of Ag addition (0-20 wt%) on polycrystalline Sr0.6K0.4Fe2As2 superconductor has been investigated. It is found that the critical transition temperature Tc was not depressed, and the irreversibility field Hirr and hysteresis magnetization were significantly enhanced upon Ag addition. Characterization study reveals that larger grains are observed in the Ag-added samples. Moreover, the formation of glassy phase as well as amorphous layer, which are present in almost all the grain edges and boundaries in pure samples, are suppressed by Ag addition. The improvement of superconducting properties in Ag-added samples may originate from the enlargement of grains as well as better connections between grains
description: 17 pages, 7 figures. Supercond. Sci. Technol.,accepted
One More Step Towards Reality: Cooperative Bandits with Imperfect Communication
Creators: name: Madhushani, Udari
name: Dubey, Abhimanyu
name: Leonard, Naomi Ehrich
name: Pentland, Alex
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The cooperative bandit problem is increasingly becoming relevant due to its applications in large-scale decision-making. However, most research for this problem focuses exclusively on the setting with perfect communication, whereas in most real-world distributed settings, communication is often over stochastic networks, with arbitrary corruptions and delays. In this paper, we study cooperative bandit learning under three typical real-world communication scenarios, namely, (a) message-passing over stochastic time-varying networks, (b) instantaneous reward-sharing over a network with random delays, and (c) message-passing with adversarially corrupted rewards, including byzantine communication. For each of these environments, we propose decentralized algorithms that achieve competitive performance, along with near-optimal guarantees on the incurred group regret as well. Furthermore, in the setting with perfect communication, we present an improved delayed-update algorithm that outperforms the existing state-of-the-art on various network topologies. Finally, we present tight network-dependent minimax lower bounds on the group regret. Our proposed algorithms are straightforward to implement and obtain competitive empirical performance.
title: Diferencias anatómicas por TC de las hernias de la región inguinal
Creators: name: Higuero Hernando, Sara
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: CT

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Diferenciación anatómica de las diferentes hernias abdominales externas que nos podemos encontrar a nivel de la región inguinal mediante la utilización de...
Essays on the Long-Term Consequences from Entering the Labor Market During a Recession
Creators: name: Mask, Joshua Floyd
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Starting a career during a recession can be difficult. The lack of job opportunities and increased number of job applicants means a lot of competitive pressure for inexperienced job-seekers. After exhaustive searches, many may accept lower wages than they would if the economy were booming. Over time, these unfortunate circumstances lead to a long-term negative wage disparity called scarring. In this dissertation, I first study scarring in the context of migration. I find scarring can be particularly severe for vulnerable groups like refugees. I also study scarring in the context of policy by looking at recently passed Salary History Ban laws. I find the scarring effect is partially reversed when employers no longer ask about prior salary and/or advertise expected salaries in their job postings.
Violation of Bell-like Inequality for spin-energy entanglement in neutron polarimetry
Creators: name: Sponar, S.
name: Klepp, J.
name: Zeiner, C.
name: Badurek, G.
name: Hasegawa, Y.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Violation of a Bell-like inequality for a spin-energy entangled neutron state has been confirmed in a polarimetric experiment. The proposed inequality, in Clauser-Horne-Shimony-Holt (CHSH) formalism, relies on correlations between the spin and energy degree of freedom in a single-neutron system. The entangled states are generated utilizing a suitable combination of two radio-frequency fields in a neutron polarimeter setup. The correlation function S is determined to be 2.333+/-0.005, which violates the Bell-like CHSH inequality by more than 66 standard deviations.
description: 4 pages 2 figures
MPEC 2024-S166 : 2024 SS4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SS4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Electronic Excitations in Transition Metal Dioxide and Open-Shell Molecular Systems
Creators: name: Rezaei, Meisam
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Many-body perturbation within the GW approximation is a powerful method to calculate the electron removal and addition energies in a wide variety of bulk and molecular systems. Over the last decade, there have been an increasing number of studies that have benchmarked the performance of this method in molecular systems. Most of these studies have focused on closed-shell and sp-bonded molecules. In this thesis, I investigate the performance of different flavors of the GW approximation in two systems: (i) negatively charged 3d-transition metal dioxide molecules, and (ii) systems that exhibit multiplet splitting in their photoelectron spectra. These are systems of both technological and scientific interest, and they present significant computational challenges for straightforward application of GW methods due to enhanced electron correlations and their open-shell character. For the first system, I present results and analyses of photoelectron spectra of early 3d-transition metal dioxide molecular anions TMO2- (TM = Sc, Ti, V, Cr, Mn) computed using semi-local and hybrid density functional theory (DFT) and the GW approximation with perturbative and eigenvalue self-consistent formalisms. The results are compared with each other and with experimental photoelectron spectroscopy data. I show that perturbative GW with a particular fraction of exact exchange (25%) on top of Perdew-Burke-Ernzerhof exchange-correlation functional provides excellent agreement with experiment by mitigating self-interaction error. I also show that an eigenvalue self-consistent formalism with updates in the Green’s function is a reasonably accurate choice for computing electron removal energies. In the second project, I investigate the performance of two different perturbative GW approaches with hybrid functional DFT starting points for five sp-bonded open-shell molecules, NO2, NF2, ClO2, O2, and S2, containing multiplet-split orbitals in their photoelectron spectra. My results show that (i) typical semi-local exchange-correlation functionals do not provide good agreement with experimental data for multiplet-split orbitals, and (ii) it is possible to accurately predict multiplet splitting in open-shell molecules by adding a fraction of exact exchange in the DFT starting point.
Direct radiative capture of Alpha-particles by Tritium
Creators: name: Ottewell, David Frederick
Publisher: name: University of British Columbia
Year: 2010

description: Improved absolute cross section and angular distribution measurements have been made for the direct radiative capture of alpha-particles by tritium. Gamma-ray yields have been obtained for laboratory energies ranging from .360 to 1.883 MeV for capture to the P[sub 3/2-] ground state and to the P[sub 1/2-] first excited state. Angular distributions have been measured at three angles and two energies (.853 MeV and 1.883 MeV). These measurements are more accurate than previous ones due to the use of better gamma-ray detectors, improved targets, and a more accurate determination of the tritium content of these targets. An approximate direct capture calculation has been done which incorporates a simple two-body model to estimate the cross section of the T([Mathematical Values])⁷Li reaction. An averaged local potential was used to describe the interaction between the alpha-particle and the triton, where the interior structure of both particles was assumed to play no role in the capture interaction. The model involves the calculation of electromagnetic matrix elements between initial and final state wave functions evaluated for Saxon-Woods potentials with parameters adjusted to fit both elastic scattering data and the binding energies for the ground and first excited states of ⁷Li. The scattering phase shifts were extrapolated from data measured at energies higher than those used for the present experiment. Some characteristics implied by a more detailed treatment of the wave functions, that incorporate exchange effects, have affected the choice of parameters for the two-body model. The model gives a reasonable fit to the measured cross sections considering that no free parameters were incorporated in the calculation once the wave functions had been defined by the phase shifts and the binding energies. There are some unresolved discrepancies in the theoretical and experimental angular distributions.
Scaling behaviour of the critical current in clean epitaxial Ba(Fe1-xCox)2As2 thin films
Creators: name: Iida, K.
name: Haenisch, J.
name: Thersleff, T.
name: Kurth, F.
name: Kidszun, M.
name: Haindl, S.
name: Huehne, R.
name: Schultz, L.
name: Holzapfel, B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The angular-dependent critical current density, Jc(theta), and the upper critical field, Hc2(theta), of epitaxial Ba(Fe1-xCox)2As2 thin films have been investigated. No Jc(theta) peaks for H || c were observed regardless of temperatures and magnetic fields. In contrast, Jc(theta) showed a broad maximum at theta=90 degree, which arises from intrinsic pinning. All data except at theta=90 degree can be scaled by the Blatter plot. Hc2(theta) near Tc follows the anisotropic Ginzburg-Landau expression. The mass anisotropy increased from 1.5 to 2 with increasing temperature, which is an evidence for multi-band superconductivity.
description: Accepted in Physical Review B rapid communications
Additional file 1 of The relationship between screen time and attention deficit/hyperactivity disorder in Chinese preschool children under the multichild policy: a cross-sectional survey
Creators: name: Zhou, Yu
name: Jiang, Xinye
name: Wang, Ran
name: Guo, Bingbing
name: Cai, Jingfen
name: Gu, Yujing
name: Pei, Jingjing
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Mental Health

description: Supplementary Material 1
QED effects on the nuclear magnetic shielding of $^3$He
Creators: name: Wehrli, Dominik
name: Spyszkiewicz-Kaczmarek, Anna
name: Puchalski, Mariusz
name: Pachucki, Krzysztof
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The leading quantum electrodynamic corrections to the nuclear magnetic shielding in one- and two-electron atomic systems are obtained in a complete form, and the shielding constants of $^1$H, $^3$He$^+$, and $^3$He are calculated to be $17.735\,436(3) \cdot 10^{-6}$, $35.507\,434(9)\cdot 10^{-6}$, and $59.967\,029(23)\cdot 10^{-6}$, respectively. These results are orders of magnitude more accurate than previous ones, and, with the ongoing measurement of the nuclear magnetic moment of $^3$He$^+$ and planned $^3$He$^{2+}$, they open the window for high-precision absolute magnetometry using $^3$He NMR probes. The presented theoretical approach is applicable to all other light atomic and molecular systems, which facilitates the improved determination of magnetic moments of any light nuclei.
description: 6 pages
title: Técnica y Diagnóstico de la afectación Digestiva en la Enfermedad de Chagas
Creators: name: Garcia Galera, Amparo
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: Tropical diseases

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
Describir la técnica,
hallazgos y utilidad de los estudios baritados en pacientes diagnosticados de enfermedad de Chagas en la Agencia Pública Empresarial Sanitaria (APES) Hospital de Poniente en...
Reinforcement Learning for Real Options: Interpretable Planning Under Uncertainty and Limited Data
Creators: name: Mohseni-Taheri, Seyed Danial
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Reinforcement learning (RL) has achieved great milestones for planning under uncertainty, especially in applications such as game playing and Robotics. However, the deployment of RL algorithms in real-world business problems is often hard. In this thesis, we address some of the implementation challenges, including the complexity of algorithms and/or policies that make them less understandable to RL non-experts, computational challenges related to the curses of dimensionality, and limited data in modeling the operating environment accurately in applications in the operations-finance area. In the second chapter, we study and model a new application in sustainable operations related to renewable power procurement. We focus on companies committed to procuring a specified percentage of their annual electricity demand from a renewable power source by a future date. We design a new rolling horizon policy based on information relaxation and duality theory with interpretable approximations, and in addition, account for uncertainty directly while computing decisions to address the issue of the curse of dimensionality. In the third chapter, we focus on the problem faced by a firm providing services to store ethanol and analyze the behavior of users interacting with this storage provider. We address the challenge of limited users' interaction by building a sample-efficient model of user behavior using Gaussian processes in a non-standard manner that leverages interpretable characterizations of the optimal policy from the operations management literature. In the final chapter, we investigate the long-term capacity investment problem faced by a hydropower plant and tackle the challenges of the curse of dimensionality and limited long-term market data. We design an RL algorithm to hedge against long-term model misspecification risk while mitigating any financial losses due to being overly conservative and extend the interpretable reoptimization techniques.
Hunting high and low: XMM monitoring of the eclipsing polar HU Aquarii
Creators: name: Schwarz, R.
name: Schwope, A. D.
name: Vogel, J.
name: Dhillon, V. S.
name: Marsh, T. R.
name: Copperwheat, C.
name: Littlefair, S. P.
name: Kanbach, G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We want to study the temporal and spectral behaviour of HU Aqr in the X-ray domain during different accretion states. We obtained spectra and light curves from four different XMM-Newton pointings covering intermediate and low states. The X-ray observations were accompanied with high time resolution photometry obtained with the Optima and ULTRACAM instruments. On two occasions in May 2002 and 2003 HU Aqr was found in an intermediate state with the accretion rate reduced by a factor of 50 compared to earlier high state measurements. X-ray spectra in the intermediate state can be described by a model containing a blackbody component and hot thermal plasma. Contrary to the high state the ratio between soft and hard X-ray flux is nearly balanced. In agreement with previous measurements we observed a migration of the accretion spot and stream towards the line connecting both stars. The brightness of HU Aqr was further reduced by a factor of 80 during two low states in October 2003 and May 2005, where it was detected at a luminosity of only L_X = 4.7 * 10^(28) erg/sec . This luminosity would fit well with an active coronal emitter, but the relatively high plasma temperatures of 3.5 and 2.0 keV are more compatible with residual accretion. We updated the eclipse ephemeris of HU Aqr based on the eclipse egress of the accretion spot measured in various wavelength bands. The (O-C)-diagram of the observed accretion spot eclipse timings reveals complex deviations from a linear trend, which can be explained by a constant or cyclic period change or a combination thereof. The quadratic term implies a period decrease at a rate of \dot{P}_orb = -7..-11 * 10^(-12) sec/sec. In case the observed period change reflects a true angular momentum loss, this would be a factor of 30 larger than given by gravitational radiation.
description: Accepted for publication in Astronomy & Astrophysics
title: Fractura por avusión del trocanter menor en el adulto.
Creators: name: Esnal Andueza, Ion Gurutz
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Trauma
subject: Metastases
subject: CT
subject: MR
subject: Conventional radiography
subject: Oncology
subject: Musculoskeletal bone
subject: Bones

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Revisar las causas de la avulsión del trocanter menor en el...
Extremal Problems for Graphs and Hypergraphs
Creators: name: Mukherjee, Sayan
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Given a fixed graph G and a positive integer n, the extremal number [Turan, 1941] denotes the maximum number of edges a graph on n vertices can have without copies of G. Determining the extremal number for arbitrary graphs, or even its asymptotic behavior, is a tremendously difficult problem. The work of several researchers on this problem led to the birth of the field of extremal combinatorics. In this work, we study three different extensions of the extremal number: (a) A general study of the Erdos-Komlos function, (b) The generalized Turan problem of counting triangles, and (c) The extremal number of 3-graphs.
Instability of superfluid Fermi gases induced by a roton-like density mode in optical lattices
Creators: name: Yunomae, Yoshihiro
name: Yamamoto, Daisuke
name: Danshita, Ippei
name: Yokoshi, Nobuhiko
name: Tsuchiya, Shunji
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the stability of superfluid Fermi gases in deep optical lattices in the BCS--Bose-Einstein condensation (BEC) crossover at zero temperature. Within the tight-binding attractive Hubbard model, we calculate the spectrum of the low-energy Anderson-Bogoliubov (AB) mode as well as the single-particle excitations in the presence of superfluid flow in order to determine the critical velocities. To obtain the spectrum of the AB mode, we calculate the density response function in the generalized random-phase approximation applying the Green's function formalism developed by Côté and Griffin to the Hubbard model. We find that the spectrum of the AB mode is separated from the particle-hole continuum having the characteristic rotonlike minimum at short wavelength due to the strong charge-density-wave fluctuations. The energy of the rotonlike minimum decreases with increasing the lattice velocity and it reaches zero at the critical velocity which is smaller than the pair breaking velocity. This indicates that the superfluid state is energetically unstable due to the spontaneous emission of the short-wavelength rotonlike excitations of the AB mode instead due to pair-breaking. We determine the critical velocities as functions of the interaction strength across the BCS-BEC crossover regime.
description: 37 pages, 15 figures
Massive 3D Supergravity
Creators: name: Andringa, Roel
name: Bergshoeff, Eric A.
name: de Roo, Mees
name: Hohm, Olaf
name: Sezgin, Ergin
name: Townsend, Paul K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct the N=1 three-dimensional supergravity theory with cosmological, Einstein-Hilbert, Lorentz Chern-Simons, and general curvature squared terms. We determine the general supersymmetric configuration, and find a family of supersymmetric adS vacua with the supersymmetric Minkowski vacuum as a limiting case. Linearizing about the Minkowski vacuum, we find three classes of unitary theories; one is the supersymmetric extension of the recently discovered `massive 3D gravity'. Another is a `new topologically massive supergravity' (with no Einstein-Hilbert term) that propagates a single (2,3/2) helicity supermultiplet.
description: 39 pages, 2 figures; v2: minor corrections, refs. added; v3: version to appear in CQG
A new dynamical model for solving rotation averaging problem
Creators: name: Kapić, Zinaid
name: Crnkić, Aladin
name: Jaćimović, Vladimir
name: Mijajlović, Nevena
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The paper analyzes the rotation averaging problem as a minimization problem for a potential function of the corresponding gradient system. This dynamical system is one generalization of the famous Kuramoto model on special orthogonal group SO(3), which is known as the non-Abelian Kuramoto model. We have proposed a novel method for finding weighted and unweighted rotation average. In order to verify the correctness of our algorithms, we have compared the simulation results with geometric and projected average using real and random data sets. In particular, we have discovered that our method gives approximately the same results as geometric average.
Help-seeking Among Mothers with Postpartum Obsessive Compulsive Disorder: A Phenomenological Exploration
Creators: name: Knepper, Amanda
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Abstract Help-Seeking among Mothers with Postpartum Obsessive-Compulsive Disorder: A Phenomenological Exploration Clinically significant perinatal mental illness affects an estimated 15-20 percent of the global childbearing population. Compared with the most commonly diagnosed perinatal mental health conditions (e.g., depressive and anxiety disorders), postpartum Obsessive Compulsive Disorder (ppOCD) is less well understood and often under- or misdiagnosed. The purpose of this exploratory qualitative study was to gain a beginning understanding of mothers' lived experience of ppOCD, with special attention to their help-seeking experiences. Using interpretive phenomenological research methods, I conducted interviews with six mothers who had been diagnosed with OCD during the postpartum period. The Network Episode Model, which conceptualizes help-seeking as a dynamic, interactive process, was applied throughout the study as a sensitizing framework. Ricoeur's Interpretation Theory guided the analysis process. Following initial coding and thematic development, I conducted member checks with participants, shared the findings, elicited feedback, and modified the thematic structure accordingly. Four predominant experiential themes emerged from these analyses: Perceiving a problem: Early internal experiences with ppOCD; Secrets and Shame; Searching for Solutions; and Learning to Live with OCD: Acceptance and Resilience. Mothers experienced persistent intrusive thoughts of their child(ren) and/or themselves being seriously harmed or killed, either intentionally, accidentally, or due to illness. At symptom onset, mothers had no pre-existing knowledge of ppOCD. Feelings of shame about the content of intrusive thoughts, as well as perceived public- and self-stigma, impeded their help-seeking process. Alternatively, a self-directed process of knowledge and resource seeking via independent internet research and social networking promoted feelings of personal empowerment, facilitating professional help-seeking and treatment adherence. Obtaining an accurate diagnosis, working with a mental health practitioner who "understood" ppOCD, and having a strong social support system resulted in achieving a greater understanding of ppOCD as a treatable illness, decreased psychological distress, and promoted resilience. The findings emphasize the need to carefully screen for and identify ppOCD among women during the postpartum period, and to provide adequate training for medical and mental health providers caring for this population to better understand the clinical presentation, provide quality, non-stigmatizing treatment services, and to promote social network support.
Raman Spectroscopy of Graphene Edges
Creators: name: Casiraghi, C.
name: Hartschuh, A.
name: Qian, H.
name: Piscanec, S.
name: Georgi, C.
name: Novoselov, K. S.
name: Basko, D. M.
name: Ferrari, A. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Graphene edges are of particular interest, since their chirality determines the electronic properties. Here we present a detailed Raman investigation of graphene flakes with well defined edges oriented at different crystallographic directions. The position, width and intensity of G and D peaks at the edges are studied as a function of the incident light polarization. The D-band is strongest for light polarized parallel to the edge and minimum for perpendicular orientation. Raman mapping shows that the D peak is localized in proximity of the edge. The D to G ratio does not always show a significant dependence on edge orientation. Thus, even though edges can appear macroscopically smooth and oriented at well defined angles, they are not necessarily microscopically ordered.
title: Regiones anatómicas de referencia para sustancia gris y blanca en los estudios de perfusión con RM.
Creators: name: Marquina Martínez, Diana
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Neuroradiology brain
subject: MR-Diffusion/Perfusion

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
Localizar las regiones anatómicas del parénquima cerebral con una menor variabilidad en los estudios de perfusión mediante RM de la sustancia gris y blanca...
Optimal Concentration of Light in Turbid Materials
Creators: name: van Putten, E. G.
name: Lagendijk, A.
name: Mosk, A. P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In turbid materials it is impossible to concentrate light into a focus with conventional optics. Recently it has been shown that the intensity on a dyed probe inside a turbid material can be enhanced by spatially shaping the wave front of light before it enters a turbid medium. Here we show that this enhancement is due to concentration of light energy to a spot much smaller than a wavelength. We focus light on a dyed probe sphere that is hidden under an opaque layer. The light is optimally concentrated to a focus which does not exceed the smallest focal area physically possible by more than 68%. A comparison between the intensity enhancements of both the emission and excitation light supports the conclusion of optimal light concentration.
description: We corrected an ambiguous description of the focus size in our abstract and text pointed out by an anonymous referee
title: METABOLÓMICA EN CÁNCER DE MAMA ¿Qué se está haciendo? ¿Cuál puede ser el papel del Radiólogo en un futuro?
Creators: name: García Bocanegra, Irene Isabel
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Breast
subject: Oncology
subject: Molecular imaging
subject: MR-Spectroscopy
subject: MR
subject: Experimental
subject: Experimental investigations
subject: Biopsy
subject: Neoplasia
subject: Tissue characterisation

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
La metabolómica por HR-MAS (del inglés high resolution magic angle spinning) es una técnica de RMN en la que se realiza la espectroscopía de los metabolitos de pequeños fragmentos de tejidos intactos ex-vivo (por ejemplo de biopsias de...
First stages of the InP(1 0 0) surfaces nitridation studied by AES, EELS and EPES
Creators: name: Petit, M.
name: Ould-Metidji, Yamina Andre
name: Robert-Goumet, Christine
name: Bideux, Luc
name: Gruzza, Bernard
name: Matolin, Vladimir
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The nitrides of group III metals: AlN, GaN and InN are very important materials due to their applications for short wavelength opto-electronics (light-emitting diodes and laser diodes). It is essential for the realization of such novel devices to grow high-quality nitride single crystals. In this paper, we report the first stages of the InP(1 0 0) surfaces nitridation in order to grow high-quality nitride films. Indeed, the nitridation process is an important step in the growth of nitrides [J. Vac. Sci. Technol. A 17 (1999) 2194; Phys. Status Solidi A 176 (1999) 595]. Previous works [Synth. Met. 90 (1997) 2233; Appl. Phys. Lett. 63 (1993) 1957] have shown that in situ Ar+ ions bombardment is useful on the one hand to clean the surface, and on the other hand to create droplets of metallic indium in well-controlled quantity. Then the indium metallic enrichment of the surface, monitoring by elastic peak electron spectroscopy (EPES) and Auger electron spectroscopy (AES) allows to prepare the III-V semiconductors surfaces to the nitridation step. The nitridated process has been performed with a high voltage plasma discharge cell and has been studied using quantitative Auger electron spectroscopy, elastic peak electron spectroscopy and electron energy loss spectroscopy (EELS), in order to optimize the conditions of InN layers formation.
Probing Nanostructures on Surfaces with Scanning Tunneling Microscopy and Tip-Enhanced Raman Spectroscopy
Creators: name: Schultz, Jeremy F
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: In nanostructures and chemistry on surfaces, subtle interactions and highly localized chemical environments are paramount as the system is confined to two dimensions. Here, a hybrid technique that combines imaging and spectroscopy was used to achieve ångström scale investigations of nanostructures on surfaces. Scanning tunneling microscopy (STM) provides the ability to probe and manipulate individual atoms and molecules on a surface, revealing local structures with atomic-scale topographic imaging. When the STM tip is composed of a plasmonic metal, illumination with focused light can result in a highly localized and atomically confined electromagnetic enhanced field at the apex of the tip. This results in the ability to perform tip-enhanced Raman spectroscopy (TERS) where a TERS spectrum reveals the highly sensitive vibrational fingerprint of a molecule or material. In ultra-high vacuum (UHV) and cryogenic temperatures, the spatial resolution of TERS can be pushed to the ångström scale, providing the means to spectroscopically characterize the on-surface interactions and reactions of individual molecules. Low temperature UHV-STM-TERS was used to investigate the fundamental interactions that underlie nanostructures on surfaces. The strength of molecule–substrate interactions were found to depend on the intrinsic properties of the molecules and substrate. A surface-catalyzed dehydrocyclization reaction was studied at the single-molecule level on various noble metal substrates, including a single-atom alloy. Additionally, a common reaction-based method used to fabricate carbon nanostructures on surfaces was investigated. It was found that local chemical environments can steer the selectivity of coupling reactions and that the inclusion of functional groups in the precursor monomer results in the formation of nanostructures defined by competing interactions. Finally, a subnanoscale spectroscopic study of interfacial interactions in a newly realized organic/borophene vertical heterostructure is described. This work concludes with a discussion of the future directions and outlook for TERS, framing it within the broader context of light–matter interactions at the atomic-scale. Fundamental studies at the spatial limit provide the means to visualize the intrinsic properties and local interactions of individual molecules and materials that are essential to the realization of new atomically precise nanostructures.
title: Quistes aracnoideos intracraneales y espinales: Estudio radiológico de los incidentales, los sintomáticos y los complicados.
Creators: name: Ospina Moreno, Carolina
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Cerebrospinal fluid
subject: Cysts
subject: Diagnostic procedure
subject: CT
subject: MR
subject: Neuroradiology spine
subject: Neuroradiology brain

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
- Revisar las principales características radiológicas de los quistes aracnoideos (QA) intracraneales y espinales en los estudios de resonancia magnética y tomografía computarizada. - Conocer los diferentes espectros de presentación de los...
Exploiting fall foliage by-products to optimize Tenebrio molitor nutraceutical value
Creators: name: Brai, A.
name: Provenzani, M.P.
name: Pasqualini, C.
name: Poggialini, F.
name: Vagaggini, C.
name: Tarchi, F.
name: Frosinini, R.
name: Francardi, V.
name: Simoni, S.
name: Dreassi, E.
Publisher: name: Brill Online
Year: 2023
Subjects: classificationCode: 309999
subject: Other agricultural, veterinary and food sciences not elsewhere classified

description: Tenebrio molitor larvae (TML) are a novel smart food recently declared safe by the European Food Safety Authority (EFSA). These edible insects are a complete source of digestible proteins, and their farming requires limited space and resources. With the purpose to increase the sustainability of their farming, different nursery wastes produced during fall foliage were used as feed supplements. Punica granatum (PL), Castanea sativa (CSL) and Robinia pseudoacacia fallen leaves (AL), and the leaves of two plants used in traditional medicine, Laurus nobilis (LL) and Mentha arvensis leaves (MAL), which are rich in polyphenols, flavonoids and proanthocyanidins were added to the TML standard diet as sources of antioxidant compounds. The fortified diets were administered to TML for their entire life cycle, and mean weight and survival rate analysed every 15 days, without observing a negative impact. After 45 days, when pupation exceeded 50%, the experiment was interrupted. TML accumulated antioxidant compounds from leaves, important to prevent inflammation and oxidative stress. Accordingly, we observed a statistically relevant increment of the antioxidant and radical scavenging activities respect to the TML fed with the standard diet (STDSL). Differently from STDSL, total fat content remained constant during development, while the quality of fat ameliorated, with a beneficial reduction of SFAs and an improvement of nutritional indexes associated with cardiovascular disease prevention. In addition, we observed an important reduction in n6/n3 ratio and the accumulation of linolenic acid. Taken together, our results strongly support the use of nursery wastes to fortify TML and improve their nutraceutical value.
Effects of flow fluctuations and partial thermalization on $v_4$
Creators: name: Gombeaud, Clement
name: Ollitrault, Jean-Yves
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The second and fourth Fourier harmonic of the azimuthal distribution of particles, $v_2$ and $v_4$, have been measured in Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). The harmonic $v_4$ is mainly induced from $v_2$ as a higher-order effect. However, the ratio $v_4/(v_2)^2$ is significantly larger than predicted by hydrodynamics. Effects of partial thermalization are estimated on the basis of a transport calculation, and are shown to increase $v_4/(v_2)^2$ by a small amount. We argue that the large value of $v_4/(v_2)^2$ seen experimentally is mostly due to elliptic flow fluctations. However, the standard model of eccentricity fluctuations is unable to explain the large magnitude of $v_4/(v_2)^2$ in central collisions.
description: 9 pages