cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Boundary multifractality at the integer quantum Hall plateau transition: implications for the critical theory
Creators: name: Obuse, H.
name: Subramaniam, A. R.
name: Furusaki, A.
name: Gruzberg, I. A.
name: Ludwig, A. W. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study multifractal spectra of critical wave functions at the integer quantum Hall plateau transition using the Chalker-Coddington network model. Our numerical results provide important new constraints which any critical theory for the transition will have to satisfy. We find a non-parabolic multifractal spectrum and we further determine the ratio of boundary to bulk multifractal exponents. Our results rule out an exactly parabolic spectrum that has been the centerpiece in a number of proposals for critical field theories of the transition. In addition, we demonstrate analytically exact parabolicity of related boundary spectra in the 2D chiral orthogonal `Gade-Wegner' symmetry class.
description: 4 pages, 3 figures, v2, published version
A Selberg integral for the Lie algebra A_n
Creators: name: Warnaar, S. Ole
Publisher: name: arXiv
Year: 2007
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 05E05, 33C70, 33D67

description: A new q-binomial theorem for Macdonald polynomials is employed to prove an A_n analogue of the celebrated Selberg integral. This confirms the g=A_n case of a conjecture by Mukhin and Varchenko concerning the existence of a Selberg integral for every simple Lie algebra g.
description: 32 pages
Quantum Gates Robust to Secular Amplitude Drifts
Creators: name: Su, Qile David
name: Bruinsma, Robijn
name: Campbell, Wesley C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum gates are typically vulnerable to imperfections in the classical control fields applied to physical qubits to drive the gates. One approach to reduce this source of error is to break the gate into parts, known as composite pulses (CPs), that typically leverage the constancy of the error over time to mitigate its impact on gate fidelity. Here we extend this technique to suppress secular drifts in Rabi frequency by regarding them as sums of power-law drifts whose first-order effects on over- or under-rotation of the state vector add linearly. Power-law drifts have the form $t^p$ where $t$ is time and the constant $p$ is its power. We show that composite pulses that suppress all power-law drifts with $p \leq n$ are also high-pass filters of filter order $n+1$ arXiv:1410.1624. We present sequences that satisfy our proposed power-law amplitude criteria, $\text{PLA}(n)$, obtained with this technique, and compare their simulated performance under time-dependent amplitude errors to some traditional composite pulse sequences. We find that there is a range of noise frequencies for which the $\text{PLA}(n)$ sequences provide more error suppression than the traditional sequences, but in the low frequency limit, non-linear effects become more important for gate fidelity than frequency roll-off. As a result, the previously known $F_1$ sequence, which is one of the two solutions to the $\text{PLA}(1)$ criteria and furnishes suppression of both linear secular drift and the first order nonlinear effects, is a sharper noise filter than any of the other $\text{PLA}(n)$ sequences in the low frequency limit.
Acute hormonal regulation of gluconeogenesis in isolated rainbow trout hepatocytes
Creators: name: Petersen, Thomas
Publisher: name: University of British Columbia
Year: 2010

description: Gluconeogenesis from lactate in hepatocytes from rainbow trout was activated by glucagon and inhibited by insulin in a dose-dependent fashion. The maximal responses to both hormones occurred within their probable physiological concentration ranges. Gluconeogenic activation by glucagon was accompanied by a profound inhibition of pyruvate kinase activity. This was reflected in increases in both the So.o and nH for phosphoenolpyruvate and increased sensitivity to inhibition by MgATP compared to the enzyme isolated from cells not treated with hormone (control). Gluconeogenic inhibition by insulin was accompanied by activation of pyruvate kinase activity. This was reflected in decreases in both the So.o and nH for phosphoenolpyruvate and a decreased sensitivity to inhibition by MgATP compared to enzyme isolated from control cells. This contrasts with previous suggestions that these pancreatic hormones are not important in the regulation of carbohydrate metabolism in fishes.
Minimal obstructions to $(s,1)$-polarity in cographs
Creators: name: Contreras-Mendoza, F. Esteban
name: Hernández-Cruz, César
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C, 69, 05C70, 05C75

description: Let $k,l$ be nonnegative integers. A graph $G$ is $(k,l)$-polar if its vertex set admits a partition $(A,B)$ such that $A$ induces a complete multipartite graph with at most $k$ parts, and $B$ induces a disjoint union of at most $l$ cliques with no other edges. A graph is a cograph if it does not contain $P_4$ as an induced subgraph. It is known that $(k,l)$-polar cographs can be characterized through a finite family of forbidden induced subgraphs, for any fixed choice of $k$ and $l$. The problem of determining the exact members of such family for $k = 2 = l$ was posted by Ekim, Mahadev and de Werra, and recently solved by Hell, Linhares-Sales and the second author of this paper. So far, complete lists of such forbidden induced subgraphs are known for $0 \le k,l \le 2$; notice that, in particular, $(1,1)$-polar graphs are precisely split graphs. In this paper, we focus on this problem for $(s,1)$-polar cographs. As our main result, we provide a recursive complete characterization of the forbidden induced subgraphs for $(s,1)$-polar cographs, for every non negative integer $s$. Additionally, we show that cographs having an $(s,1)$-partition for some integer $s$ (here $s$ is not fixed) can be characterized by forbidding a family of four graphs.
A Bi-Metric Theory with Exchange Symmetry
Creators: name: Hossenfelder, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose an extension of General Relativity with two different metrics. To each metric we define a Levi-Cevita connection and a curvature tensor. We then consider two types of fields, each of which moves according to one of the metrics and its connection. To obtain the field equations for the second metric we impose an exchange symmetry on the action. As a consequence of this ansatz, additional source terms for Einstein's field equations are generated. We discuss the properties of these additional fields, and consider the examples of the Schwarzschild solution, and the Friedmann-Robertson-Walker metric.
description: 8 pages, no figures
Future operation of hydropower in Europe under high renewable penetration and climate change
Creators: name: Gøtske, Ebbe Kyhl
name: Victoria, Marta
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The balancing provided by hydropower reservoirs is essential in the transition towards a decarbonised European energy system, but the resource might be impacted by future climate change. In this work, we first analyse the hydropower operation needed to balance a wind and solar dominated European energy system, to signify whether and to what extent hydropower is required to operate differently due to the decarbonisation of the energy system. Second, we apply runoff data achieved with 10 dynamically downscaled climate models with 0.11 x 0.11 deg horizontal and daily resolution to project the future reservoir inflow at three CO2 emissions scenarios: low (RCP2.6), mid (RCP4.5), and high emissions (RCP8.5). We show that the decarbonised energy system increases the ramp rates and seasonality of the hydropower operation. Despite large interannual and intermodel variability, we found a significant change in annual inflow due to climate change in 20 out of 22 European countries at the mid and high emissions scenarios. The seasonal profile, as well as the frequency and duration of droughts and floods, is also projected to be impacted.
description: Article (16 pages, 11 figures) + supplementary material (20 pages, 18 figures)
Anisotropic superconductivity in topological crystalline metal Pb$_{1/3}$TaS$_2$ with multiple Dirac fermions
Creators: name: Yang, Xiaohui
name: Yu, Tonghua
name: Xu, Chenchao
name: Wang, Jialu
name: Hu, Wanghua
name: Xu, Zhuokai
name: Wang, Tao
name: Zhang, Chao
name: Ren, Zhi
name: Xu, Zhu-an
name: Hirayama, Motoaki
name: Arita, Ryotaro
name: Lin, Xiao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Topological crystalline metals/semimetals (TCMs) have stimulated a great research interest, which broaden the classification of topological phases and provide a valuable platform to explore topological superconductivity. Here, we report the discovery of superconductivity and topological features in Pb-intercalated transition-metal dichalcogenide Pb$_{1/3}$TaS$_2$. Systematic measurements indicate that Pb$_{1/3}$TaS$_2$ is a quasi-two-dimensional (q-2D) type-II superconductor ({\em T}$_c \approx$ 2.8 K) with a significantly enhanced anisotropy of upper critical field ($γ_{H_{c2}}$ = $H_{c2}^{ab}/H_{c2}^{c}$ $\approx$ 17). In addition, first-principles calculations reveal that Pb$_{1/3}$TaS$_2$ hosts multiple topological Dirac fermions in the electronic band structure. We discover four groups of Dirac nodal lines on the $k_z = π$ plane and two sets of Dirac points on the rotation/screw axes, which are protected by crystalline symmetries and robust against spin-orbit coupling (SOC). Dirac-cone-like surface states emerge on the (001) surface because of band inversion. Our work shows that the TCM candidate Pb$_{1/3}$TaS$_2$ is a promising arena to study the interplay between superconductivity and topological Dirac fermions.
Two-particle scattering from finite-volume quantization conditions using the plane wave basis
Creators: name: Meng, Lu
name: Epelbaum, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose an alternative approach to Lüscher's formula for extracting two-body scattering phase shifts from finite volume spectra with no reliance on the partial wave expansion. We use an effective-field-theory-based Hamiltonian method in the plane wave basis and decompose the corresponding matrix elements of operators into irreducible representations of the relevant point groups. The proposed approach allows one to benefit from the knowledge of the long-range interaction and avoids complications from partial wave mixing in a finite volume. We consider spin-singlet channels in the two-nucleon system and pion-pion scattering in the $ρ$-meson channel in the rest and moving frames to illustrate the method for non-relativistic and relativistic systems, respectively. For the two-nucleon system, the long-range interaction due to the one-pion exchange is found to make the single-channel Lüscher formula unreliable at the physical pion mass. For S-wave dominated states, the single-channel Lüscher method suffers from significant finite-volume artifacts for a $L=3$~fm box, but it works well for boxes with $L>5$~fm. However, for P-wave dominated states, significant partial wave mixing effects prevent the application of the single-channel Lüscher formula regardless of the box size (except for the near-threshold region). Using a toy model to generate synthetic data for finite-volume energies, we show that our effective-field-theory-based approach in the plane wave basis is capable of a reliable extraction of the phase shifts. For pion-pion scattering, we employ a phenomenological model to fit lattice QCD results at the physical pion mass. The extracted P-wave phase shifts are found to be in a good agreement with the experimental results.
description: 40 pages, 14 figures,12 tables. Accepted version by JHEP
Using Source Proper Motion to Validate Terrestrial Parallax: OGLE-2019-BLG-1058
Creators: name: Shin, In-Gu
name: Yee, Jennifer C.
name: Hwang, Kyu-Ha
name: Udalski, Andrzej
name: Gould, Andrew
name: Albrow, Michael D.
name: Chung, Sun-Ju
name: Han, Cheongho
name: Jung, Youn Kil
name: Kim, Hyoun-Woo
name: Ryu, Yoon-Hyun
name: Shvartzvald, Yossi
name: Zang, Weicheng
name: Cha, Sang-Mok
name: Kim, Dong-Jin
name: Kim, Seung-Lee
name: Lee, Chung-Uk
name: Lee, Dong-Joo
name: Lee, Yongseok
name: Park, Byeong-Gon
name: Pogge, Richard W.
name: Mróz, Przemek
name: Szymański, Michał K.
name: Skowron, Jan
name: Poleski, Radek
name: Soszyński, Igor
name: Pietrukowicz, Paweł
name: Kozłowski, Szymon
name: Ulaczyk, Krzysztof
name: Rybicki, Krzysztof A.
name: Iwanek, Patryk
name: Wrona, Marcin
name: Gromadzki, Mariusz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We show that because the conditions for producing terrestrial microlens parallax (TPRX; i.e., a nearby disk lens) will also tend to produce a large lens-source relative proper motion ($μ_{\rm rel}$), source proper motion (${\boldsymbolμ}_{\rm S}$) measurements in general provide a strong test of TPRX signals, which \citet{gould13} showed were an important probe of free-floating planet (FFP) candidates. As a case study, we report a single-lens/single-source microlensing event designated as OGLE-2019-BLG-1058. For this event, the short timescale ($\sim 2.5$ days) and very fast $μ_{\rm rel}$ ($\sim 17.6\, {\rm mas\, yr^{-1}}$) suggest that this isolated lens is an FFP candidate located in the disk of our Galaxy. For this event, we find a TPRX signal consistent with a disk FFP, but at low significance. A direct measurement of the ${\boldsymbolμ}_{\rm S}$ shows that the large $μ_{\rm rel}$ is due to an extreme ${\boldsymbolμ}_{\rm S}$, and thus, the lens is consistent with being a very low-mass star in the bulge and the TPRX measurement is likely spurious. By contrast, we show how a precise measurement of ${\boldsymbolμ}_{\rm S}$ with the mean properties of the bulge proper motion distribution would have given the opposite result; i.e., provided supporting evidence for an FFP in the disk and the TPRX measurement.
description: 15 pages, 10 figures, 4 tables, accepted for a publication in the AJ
Программа дисциплины «Экология человека»
Creators: name: А.Н., Ямсков
Publisher: name: Zenodo
Year: 2008
Subjects: экология человека
экологическое образование

description: Программа дисциплины специализации на 72 аудиторных часа (3-й год обучения), читавшейся автором на Географическом факультете Московского Городского Педагогического Университета в конце 2000-х – начале 2010-х гг.
Variations of the Galactic Cosmic Rays in the Recent Solar Cycles
Creators: name: Fu, Shuai
name: Zhang, Xiaoping
name: Zhao, Lingling
name: Li, Yong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In this paper, we study the galactic cosmic ray (GCR) variations over the solar cycles 23 and 24, with measurements from the NASA's ACE/CRIS instrument and the ground-based neutron monitors (NMs). The results show that the maximum GCR intensities of heavy nuclei (nuclear charge 5-28, 50-500 MeV/nuc) at 1 AU during the solar minimum in 2019-2020 break their previous records, exceeding those recorded in 1997 and 2009 by ~25% and ~6%, respectively, and are at the highest levels since the space age. However, the peak NM count rates are lower than those in late 2009. The difference between GCR intensities and NM count rates still remains to be explained. Furthermore, we find that the GCR modulation environment during the solar minimum P24/25 are significantly different from previous solar minima in several aspects, including remarkably low sunspot numbers, extremely low inclination of the heliospheric current sheet, rare coronal mass ejections, weak interplanetary magnetic field and turbulence. These changes are conducive to reduce the level of solar modulation, providing a plausible explanation for the record-breaking GCR intensities in interplanetary space.
description: Accepted by the Astrophysical Journal Supplement
title: The Effect of Goal-Setting Prompts in a Blended Learning Environment
title: Evidence from a Field Experiment
titleType: Subtitle
Creators: name: Amann, Erwin
name: Rzepka, Sylvi
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 330 Wirtschaft

description: We investigate how inviting students to set task-based goals affects usage of an online learning platform and course performance. We design and implement a randomized field experiment in a large mandatory economics course with blended learning elements. The low-cost treatment induces students to use the online learning system more often, more intensively, and to begin earlier with exam preparation. Treated students perform better in the course than the control group: they are 18.8% (0.20 SD) more likely to pass the exam and earn 6.7% (0.19 SD) more points on the exam. There is no evidence that treated students spend significantly more time, rather they tend to shift to more productive learning methods. The heterogeneity analysis suggests that higher treatment effects are associated with higher levels of behavioral bias but also with poor early course behavior.
description: CEPA Discussion Papers; 25
Zwei Geschiebe von Riebeckit-Porphyr aus dem Geschiebemergel des Samlandes (Ostpreußen)
Creators: name: Herbert, Horst-Jürgen
name: Eisenack, Alfred
Publisher: name: Geozon Science Media
Year: 1981

description: Zwei Geschiebe des Samländer Geschiebemergels sollen hier eine kurze Beschreibung finden. Die beiden Proben wurden von EISENACK 1924 und 1936 gesammelt und HERBERT zur Bearbeitung überlassen. Die Fundpunkte, beide am Fuße der Geschiebemergel-Steilküste des Samlandes, liegen etwa 1 km südlich von Groß-Dirschheim, rd. 1 km voneinander entfernt. Bei den Proben handelt es sich um zwei Geschiebe identisch im Habitus, 1,014 bzw. 3 - 4 kg schwer und mit einer Dichte von 2,65 g / cm³ (Bestimmung von EISENACK). Die mikroskopische Untersuchung ergab, daß es sich bei den Gesteinen um pseudosphärolithische Riebeckit-Porphyre handelt, welche mit hoher Wahrscheinlichkeit der Ganggefolgschaft der nordländischen Alkaliprovinz zuzuordnen sind.
description: research
Ab initio determination of polarizabilities and van der Waals coefficients of Li atoms using the relativistic CCSD(T) method
Creators: name: Wansbeek, L. W.
name: Sahoo, B. K.
name: Timmermans, R. G. E.
name: Das, B. P.
name: Mukherjee, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report a new technique to determine the van der Waals coeffcients of lithium (Li) atoms based on the relativistic coupled-cluster theory. These quantities are determined using the imaginary parts of the scalar dipole and quadrupole polarizabilities, which are evaluated using the approach that we have proposed in [1]. Our procedure is fully ab initio, and avoids the sum-over-the-states method. We present the dipole and quadrupole polarizabilities of many of the low-lying excited states of Li. Also, the off-diagonal dipole and quadrupole polarizabilites between some of the low-lying states of Li are calculated.
description: 8 pages, 4 figures
$SU(5)_{L} \times U(1)_{Y}$ electroweak unification
Creators: name: Palcu, Adrian
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose here - for the first time in the literature, to our best knowledge - an electroweak unification based on the $SU(5)_{L}\times U(1)_{Y}$ gauge group. The spontaneous symmetry breaking takes place in the manner $SU(5)_{L}\times U(1)_{Y} \rightarrow U(1)_{em}$, due to a particular Higgs sector consisting of five scalar quintuplets. Each scalar quintuplet acquires its own vacuum expectation value, by means of a proper parametrization which is worked out once the overall vacuum expectation value in the model is established. The decoupling of the low energy regime (corresponding to the Standard Model) from the high scale (required by out model here) is straightforwardly achieved in order to preserve the consistency with the present experimental data. Finally, a promising phenomenological outcome is derived by simply tuning a single free parameter. Our results include, besides a viable one-parameter mass spectrum, also the prediction of precisely three generations in the fermion sector and the electric charge quantization.
description: 19 pages, 1 figure, 1 table
Effect of mindfulness-based stress reduction on stigma, coping styles and quality of life in patients with permanent colorectal cancer stoma: A protocol for systematic review and meta-analysis
Creators: name: Luo, QingHua
Publisher: name: Open Science Framework
Year: 2021
Subjects: subject: Medicine and Health Sciences

description: Colorectal cancer patients with permanent colostomy are associated with varying degrees of stigma, negative coping style and low quality of life. Mindfulness-based stress reduction(MBSR) can help reduce stigma, improve coping styles and improve quality of life. In recent years, researchers have attempted to use MBSR in the comprehensive treatment of colorectal cancer patients with permanent colostomy, in the expectation that the implementation of this therapy will have a good impact on patients. But at present, there is no accepted conclusion about the practical application effect. Therefore, this study conducted a meta-analysis to evaluate the effects of MBSR on stigma, coping style, and quality of life in colorectal cancer patients with permanent colostomy, providing reliable evidence for clinical application.
title: Leveraging large-deviation statistics to decipher the stochastic properties of measured trajectories
Creators: name: Thapa, Samudrajit
name: Wyłomańska, Agnieszka
name: Sikora, Grzegorz
name: Wagner, Caroline E.
name: Krapf, Diego
name: Kantz, Holger
name: Aleksei V. Chechkin
name: Metzler, Ralf
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 530 Physik

description: Extensive time-series encoding the position of particles such as viruses, vesicles, or individualproteins are routinely garnered insingle-particle tracking experiments or supercomputing studies.They contain vital clues on how viruses spread or drugs may be delivered in biological cells.Similar time-series are being recorded of stock values in financial markets and of climate data.Such time-series are most typically evaluated in terms of time-averaged mean-squareddisplacements (TAMSDs), which remain random variables for finite measurement times. Theirstatistical properties are different for differentphysical stochastic processes, thus allowing us toextract valuable information on the stochastic process itself. To exploit the full potential of thestatistical information encoded in measured time-series we here propose an easy-to-implementand computationally inexpensive new methodology, based on deviations of the TAMSD from itsensemble average counterpart. Specifically, we use the upper bound of these deviations forBrownian motion (BM) to check the applicability of this approach to simulated and real data sets.By comparing the probability of deviations fordifferent data sets, we demonstrate how thetheoretical bound for BM reveals additional information about observed stochastic processes. Weapply the large-deviation method to data sets of tracer beads tracked in aqueous solution, tracerbeads measured in mucin hydrogels, and of geographic surface temperature anomalies. Ouranalysis shows how the large-deviation properties can be efficiently used as a simple yet effectiveroutine test to reject the BM hypothesis and unveil relevant information on statistical propertiessuch as ergodicity breaking and short-time correlations.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1118
Generating Entangled Photons from the Vacuum by Accelerated Measurements: Quantum Information Theory Meets the Unruh-Davies Effect
Creators: name: Han, Muxin
name: Olson, S. Jay
name: Dowling, Jonathan P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Building on the well-known Unruh-Davies effect, we examine the effects of projective measurements and quantum communications between accelerated and stationary observers. We find that the projective measurement by a uniformly accelerated observer can excite real particles from the vacuum in the inertial frame, even if no additional particles are created by the measurement process in the accelerating frame. Furthermore, we show that the particles created by this accelerating measurement can be highly entangled in the inertial frame, and it is also possible to use this process to generate even maximally entangled two-qubit states by a certain arrangement of measurements. As a byproduct of our analysis, we also show that a single qubit of information can be perfectly transmitted from the accelerating observer to the inertial one. In principle, such an effect could be exploited in designing an entangled state generator for quantum communication.
description: 4 pages, 2 figures, clarifying discussions added
Influence of exciton-exciton correlations on the polarization characteristics of the polariton amplification in semiconductor microcavities
Creators: name: Schumacher, S.
name: Kwong, N. H.
name: Binder, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Based on a microscopic many-particle theory we investigate the influence of excitonic correlations on the vectorial polarization state characteristics of the parametric amplification of polaritons in semiconductor microcavities. We study a microcavity with perfect in-plane isotropy. A linear stability analysis of the cavity polariton dynamics shows that in the co-linear (TE-TE or TM-TM) pump-probe polarization state configuration, excitonic correlations diminish the parametric scattering process whereas it is enhanced by excitonic correlations in the cross-linear (TE-TM or TM-TE) configuration. Without any free parameters, our microscopic theory gives a quantitative understanding how many-particle effects can lead to a rotation or change of the outgoing (amplified) probe signal's vectorial polarization state relative to the incoming one's.
An analytical model to kinematically identify thin discs in MaNGA galaxies
Creators: name: Yang, Meng
name: Weijmans, Anne-Marie
name: Bershady, Matthew A.
name: Merrifield, Michael
name: Boardman, Nicholas F.
name: Drory, Niv
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an analytical model to identify thin discs in galaxies, and apply this model to a sample of SDSS MaNGA galaxies. This model fits the velocity and velocity dispersion fields of galaxies with regular kinematics. By introducing two parameters $ζ$ related to the comparison of the model's asymmetric drift correction to the observed gas kinematics and $η$ related to the dominant component of a galaxy, we classify the galaxies in the sample as "disc-dominated", "non-disc-dominated", or "disc-free" indicating galaxies with a dominating thin disc, a non-dominating thin disc, or no thin disc detection with our method, respectively. The dynamical mass resulting from our model correlates with stellar mass, and we investigate discrepancies by including gas mass and variation of the initial mass function. As expected, most spiral galaxies in the sample are disc-dominated, while ellipticals are predominantly disc-free. Lenticular galaxies show a dichotomy in their kinematic classification, which is related to their different star formation rates and gas fractions. We propose two possible scenarios to explain these results. In the first scenario, disc-free lenticulars formed in more violent processes than disc-dominated ones, while in the second scenario, the quenching processes in lenticulars lead to a change in their kinematic structures as disc-dominated lenticulars evolve to disc-free ones.
description: 13 pages, 16 figures, accepted by MNRAS
L'evoluzione dei sistemi  normativi sanitari: Utilizzo di strumenti informativi integrati per la valutazione delle cure
Creators: name: Fiorillo, Michele
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2008

description: La tesi si compone di due parti:nella prima parte ho affrontato uno studio dell'evoluzione della legislazione sanitaria e farmaceutica negli ultimi trent'anni;nella seconda parte ho presentato l'obiettivo raggiunto, e cioè la creazione di un sistema di monitoraggio della spesa farmaceutica, strumento reso possibile dalle ultime normative legislative.
New York Times Upshot/Siena College: October 2018 New Jersey 07 Poll
Creators: name: New York Times
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Likelihood of voting in 2018 election (2); vote for Democrat/Republican for Congress (1); New Jersey Congressional District 07 (1); Democratic Candidate Tom Malinowski (1); Republican Candidate Leonard Lance (1); opinion of various public figures (2); respondent would like Democrats/Republicans to control House of Representatives (1); President Donald Trump job performance (1); political partisanship (1).
Uneven Splitting of Ham Sandwiches
Creators: name: Breuer, Felix
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52A37

description: Let m_1,...,m_n be continuous probability measures on R^n and a_1,...,a_n in [0,1]. When does there exist an oriented hyperplane H such that the positive half-space H^+ has m_i(H^+)=a_i for all i in [n]? It is well known that such a hyperplane does not exist in general. The famous ham sandwich theorem states that if a_i=1/2 for all i, then such a hyperplane always exists. In this paper we give sufficient criteria for the existence of H for general a_i in [0,1]. Let f_1,...,f_n:S^{n-1}->R^n denote auxiliary functions with the property that for all i the unique hyperplane H_i with normal v that contains the point f_i(v) has m_i(H_i^+)=a_i. Our main result is that if Im(f_1),...,Im(f_n) are bounded and can be separated by hyperplanes, then there exists a hyperplane H with m_i(H^+)=a_i for all i. This gives rise to several corollaries, for instance if the supports of m_1,...,m_n are bounded and can be separated by hyperplanes, then H exists for any choice of a_1,...,a_n in [0,1]. We also obtain results that can be applied if the supports of m_1,...,m_n overlap.
description: 18 pages, 2 figures
Phase coexistance in polydisperse mixture of hard-sphere colloidal and flexible chain particles
Creators: name: Kalyuzhnyi, Y. V.
name: Cummings, P. T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A theoretical scheme for the calculation of the full phase diagram (including cloud and shadow curves, binodals and distribution functions of the coexisting phases) for colloid-polymer mixtures with polymer chain length polydispersity and hard-sphere colloidal and polymeric monomer sizes polydispersity is proposed. The scheme combines thermodynamic perturbation theory for associating fluids and recently developed method used to determine the phase diagram of polydisperse spherical shape colloidal fluids (L.Bellier-Castella {\it et al.}, {\it J.Chem.Phys.} {\bf 113}, 8337(2000)). By way of illustration we present and discuss the full phase diagram for the mixture with polydispersity in the size of the hard-sphere colloidal particles.
description: 6 pages, 4 figures
An Empirical Bayesian Approach to Limb-darkening in Modeling WASP-121b Transit Light Curves
Creators: name: Yang, Fan
name: Long, Richard J.
name: Liu, Ji-Feng
name: Shan, Su-Su
name: Guo, Rui
name: Zhang, Bo
name: Yi, Tuan
name: Zheng, Ling-Lin
name: Zhao, Zhi-Chao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a novel, iterative method using an empirical Bayesian approach for modeling the limb darkened WASP-121b transit from the TESS light curve. Our method is motivated by the need to improve $R_{p}/R_{\ast}$ estimates for exoplanet atmosphere modeling, and is particularly effective with the limb darkening (LD) quadratic law requiring no prior central value from stellar atmospheric models. With the non-linear LD law, the method has all the advantages of not needing atmospheric models but does not converge. The iterative method gives a different $R_{p}/R_{\ast}$ for WASP-121b at a significance level of 1$σ$ when compared with existing non-iterative methods. To assess the origins and implications of this difference, we generate and analyze light curves with known values of the limb darkening coefficients (LDCs). We find that non-iterative modeling with LDC priors from stellar atmospheric models results in an inconsistent $R_{p}/R_{\ast}$ at 1.5$σ$ level when the known LDC values are as those previously found when modeling real data by the iterative method. In contrast, the LDC values from the iterative modeling yields the correct value of $R_{p}/R_{\ast}$ to within 0.25$σ$. For more general cases with different known inputs, Monte Carlo simulations show that the iterative method obtains unbiased LDCs and correct $R_{p}/R_{\ast}$ to within a significance level of 0.3$σ$. Biased LDC priors can cause biased LDC posteriors and lead to bias in the $R_{p}/R_{\ast}$ of up to 0.82$\%$, 2.5$σ$ for the quadratic law and 0.32$\%$, 1.0$σ$ for the non-linear law. Our improvement in $R_{p}/R_{\ast}$ estimation is important when analyzing exoplanet atmospheres.
description: Accepted by AJ
Together, Better: Improving the Impact of Family Feedback to Build More Equitable Schools
Creators: name: Swarr, Kerry
Publisher: name: American University
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 390407
subject: Inclusive education
classificationCode: 440301
subject: Family and household studies
classificationCode: 441004
subject: Social change
classificationCode: 441008
subject: Sociology of culture
classificationCode: 441012
subject: Sociology of inequalities
classificationCode: 470208
subject: Culture, representation and identity

description: This study considers how schools can improve their structures and practices for family engagement to optimize the use and impact of family feedback to create transformational and equitable school and family collaborations. Changes in school demographics and family engagement work due to COVID, alongside a racial reckoning that emerged with the murder of George Floyd and fueled a backlash against a range of efforts to achieve greater inclusiveness of the nation’s cultural pluralism. Within education, this dynamic most notably manifested in distortions of critical race theory, which led to legislation banning its teaching across schools, including public universities in some states. It also impacted notions of parent engagement as some sought to expand and amplify the voices of marginalized parents while others worked to block those efforts through the political weaponization of the fears of White parents. Ultimately, this demands a renewed interest in parents’ role in education with particular attention on intentionally designed processes and tools to help schools cultivate authentic and meaningful partnerships with families that represent their school community is more important than ever.
Associated production of graviton with $e^+e^-$ pair via photon-photon collisions at a linear collider
Creators: name: Ya-Jin, Zhou
name: Wen-Gan, Ma
name: Liang, Han
name: Ren-You, Zhang
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the process \rreeG at the future International Linear Collider(ILC), where G_n is the Kaluza-Klein graviton in the Large Extra Dimension Model. When the fundamental energy scale is of a few ${\rm TeV}$, the cross section of this process can reach several hundred fb at a photon-photon collider with $\sqrt{s}=500 \sim 1000 GeV$, and the cross section in J=2 polarized photon collision mode is much larger than that in J=0 polarized photon collision mode. We present strategies to distinguish the graviton signal from numerous SM backgrounds, and find that the graviton signal with extra dimensions $δ=3$ can be detected when ${\rm M_S} \le 2.67(1.40) {\rm TeV}$ and $γγ$ c.m.s. energy $\sqrt{s}=1000(500) {\rm GeV}$ in unpolarized photon collision mode, while the detecting upper limit can be increased to 2.79(1.44) ${\rm TeV}$ in $+ -$ ($λ_1=1$, $λ_2=-1$) polarized photon collision mode(with photon polarization efficiency $P_γ=0.9$).
description: Accepted by Phys. Rev. D
An asymptotic model for the Kelvin-Helmholtz and Miles mechanisms of water wave generation by wind
Creators: name: Shtemler, Yuri M.
name: Mond, Michael
name: Cherniavskii, Vladimir
name: Golbraikh, Ephim
name: Nissim, Yaakov
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The generalized Kelvin-Helmholtz (KH) and Miles mechanisms of the water wave generation by wind are investigated for two-layer piece-wise linear model of the wind profile. It is shown by asymptotic expansions in small air-to-water density ratio that two mechanisms of the instability operate in quite different scales. Miles' short waves are generated by weak winds, in particular, Miles' regime is responsible for initiation of the instability at the minimum wind speed, while the generalized KH regime dominates at strong winds and raises moderately-short waves.
A Cloud-based Deep Learning Framework for Remote Detection of Diabetic Foot Ulcers
Creators: name: Cassidy, Bill
name: Reeves, Neil D.
name: Pappachan, Joseph M.
name: Ahmad, Naseer
name: Haycocks, Samantha
name: Gillespie, David
name: Yap, Moi Hoon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This research proposes a mobile and cloud-based framework for the automatic detection of diabetic foot ulcers and conducts an investigation of its performance. The system uses a cross-platform mobile framework which enables the deployment of mobile apps to multiple platforms using a single TypeScript code base. A deep convolutional neural network was deployed to a cloud-based platform where the mobile app could send photographs of patient's feet for inference to detect the presence of diabetic foot ulcers. The functionality and usability of the system were tested in two clinical settings: Salford Royal NHS Foundation Trust and Lancashire Teaching Hospitals NHS Foundation Trust. The benefits of the system, such as the potential use of the app by patients to identify and monitor their condition are discussed.
description: 10 pages, 2 figures, 1 table
Generalized local ansatz for scale-dependent primordial non-Gaussianities and future galaxy surveys
Creators: name: Yamauchi, Daisuke
name: Yokoyama, Shuichiro
name: Takahashi, Tomo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit a possible scale-dependence of local-type primordial non-Gaussianities induced by super-horizon evolution of scalar field perturbations. We develop the formulation based on $δN$ formalism and derive the generalized form of the local-type bispectrum and also trispectrum which allows us to implement the scale-dependence and suitably compare model prediction with observational data. We propose simple but phenomenologically meaningful expressions, which encompass the information of a wide range of physically motivated models. We also formulate large-scale power spectrum and bispectrum of biased objects in the presence of the scale-dependent primordial non-Gaussianities. We perform the Fisher analysis for future galaxy surveys and give the projected constraints on the parameters of the generalized local-form of primordial non-Gaussianities.
description: 29 pages, 1 figure, accepted for publication in PASJ
The Black Hole Mass of NGC 4151: Comparison of Reverberation Mapping and Stellar Dynamical Measurements
Creators: name: Onken, Christopher A.
name: Valluri, Monica
name: Peterson, Bradley M.
name: Pogge, Richard W.
name: Bentz, Misty C.
name: Ferrarese, Laura
name: Vestergaard, Marianne
name: Crenshaw, D. Michael
name: Sergeev, Sergey G.
name: McHardy, Ian M.
name: Merritt, David
name: Bower, Gary A.
name: Heckman, Timothy M.
name: Wandel, Amri
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a stellar dynamical estimate of the black hole (BH) mass in the Seyfert 1 galaxy, NGC 4151. We analyze ground-based spectroscopy as well as imaging data from the ground and space, and we construct 3-integral axisymmetric models in order to constrain the BH mass and mass-to-light ratio. The dynamical models depend on the assumed inclination of the kinematic symmetry axis of the stellar bulge. In the case where the bulge is assumed to be viewed edge-on, the kinematical data give only an upper limit to the mass of the BH of ~4e7 M_sun (1 sigma). If the bulge kinematic axis is assumed to have the same inclination as the symmetry axis of the large-scale galaxy disk (i.e., 23 degrees relative to the line of sight), a best-fit dynamical mass between 4-5e7 M_sun is obtained. However, because of the poor quality of the fit when the bulge is assumed to be inclined (as determined by the noisiness of the chi^2 surface and its minimum value), and because we lack spectroscopic data that clearly resolves the BH sphere of influence, we consider our measurements to be tentative estimates of the dynamical BH mass. With this preliminary result, NGC 4151 is now among the small sample of galaxies in which the BH mass has been constrained from two independent techniques, and the mass values we find for both bulge inclinations are in reasonable agreement with the recent estimate from reverberation mapping (4.57[+0.57/-0.47]e7 M_sun) published by Bentz et al.
description: 20 pages, including 11 low-res figures. Accepted for publication in ApJ. High resolution version available upon request
UbcH10 is useful in the diagnosis and prognosis of human neoplasms
Creators: name: Guerriero, Eliana
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: The UbcH10 gene belongs to the E2 gene family and encodes for a 19.6 kDa protein involved in ubiquitin-dependent proteolysis. The hybridization of an Affymetrix HG_U95Av2 microarray led us to highlight that this gene is up-regulated by 150 fold in all of the thyroid carcinoma cell lines in comparison to a primary cell culture of normal thyroid origin. To assess the role of UbcH10 in cancer progression, we analyzed its expression and its clinical/pathological relevance in breast and thyroid carcinomas and in lymphoproliferative diseases. In these tumor types, analysis of UbcH10 expression was performed on both cell lines and clinical samples by quantitative RT-PCR, Western blot, immunohistochemistry and flow cytometry. The effect of UbcH10 protein suppression by RNA interference was also evaluated in different tumor cell lines. Consistent data were derived from all tumor types. Deregulated UbcH10 expression was clearly associated to a highly malignant phenotype. Implications were both diagnostic and prognostic: UbcH10 specifically associated with the breast tumors more aggressive expressing ErbB2; UbcH10 specifically marked high grade non-Hodgkin lymphomas; high UbcH10 expression increased the suspicion of malignancy on preoperative thyroid biopsies. In several cell lines suppression of UbcH10 expression affected the neoplastic cell growth potential. All together our results indicate that UbcH10 is a marker of aggressive neoplastic behavior. Assessing its expression on clinical samples may contribute to both cancer diagnosis and prognosis. Moreover, the suppression of its function is to be evaluated as a potential therapeutic tool.
Universal optimal transmission of light through disordered materials
Creators: name: Vellekoop, I. M.
name: Mosk, A. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We experimentally demonstrate increased transmission of light through strongly scattering materials. Wavefront shaping is used to selectively couple light to the open transport channels in the material, resulting in an increase of up to 44% in the total transmission. The results for each of several hundreds of experimental runs are in excellent quantitative agreement with random matrix theory. Extrapolating our measurements to the limit of perfect wavefront shaping, we find a universal transmission of 2/3, regardless of the thickness of the sample.
description: 10 pages, 4 figures. Accepted for publication in Phys. Rev. Lett
The Superconformal Gaugings in Three Dimensions
Creators: name: Bergshoeff, Eric A.
name: Hohm, Olaf
name: Roest, Diederik
name: Samtleben, Henning
name: Sezgin, Ergin
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show how three-dimensional superconformal theories for any number N <= 8 of supersymmetries can be obtained by taking a conformal limit of the corresponding three-dimensional gauged supergravity models. The superconformal theories are characterized by an embedding tensor that satisfies a linear and quadratic constraint. We analyze these constraints and give the general solutions for all cases. We find new N = 4,5 superconformal theories based on the exceptional Lie superalgebras F(4), G(3) and D(2|1;α). Using the supergravity connection we discuss which massive deformations to expect. As an example we work out the details for the case of N = 6 supersymmetry.
description: 22 pages; v2: refs. added, minor corrections, version published in JHEP