cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Implicit electric field Conjugation: Data-driven focal plane control
Creators: name: Haffert, S. Y.
name: Males, J. R.
name: Ahn, K.
name: Van Gorkom, K.
name: Guyon, O.
name: Close, L. M.
name: Long, J. D.
name: Hedglen, A. D.
name: Schatz, L.
name: Kautz, M.
name: Lumbres, J.
name: Rodack, A.
name: Knight, J. M.
name: Miller, K.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Direct imaging of Earth-like planets is one of the main science cases for the next generation of extremely large telescopes. This is very challenging due to the star-planet contrast that must be overcome. Most current high-contrast imaging instruments are limited in sensitivity at small angular separations due to non-common path aberrations (NCPA). The NCPA leak through the coronagraph and create bright speckles that limit the on-sky contrast and therefore also the post-processed contrast. We aim to remove the NCPA by active focal plane wavefront control using a data-driven approach. We developed a new approach to dark hole creation and maintenance that does not require an instrument model. This new approach is called implicit Electric Field Conjugation (iEFC) and it can be empirically calibrated. This makes it robust for complex instruments where optical models might be difficult to realize. Numerical simulations have been used to explore the performance of iEFC for different coronagraphs. The method was validated on the internal source of the Magellan Adaptive Optics eXtreme (MagAO-X) instrument to demonstrate iEFC's performance on a real instrument. Numerical experiments demonstrate that iEFC can achieve deep contrast below $10^{-9}$ with several coronagraphs. The method is easily extended to broadband measurements and the simulations show that a bandwidth up to 40% can be handled without problems. Experiments with MagAO-X showed a contrast gain of a factor 10 in a broadband light and a factor 20 to 200 in narrowband light. A contrast of $5\cdot10^{-8}$ was achieved with the Phase Apodized Pupil Lyot Coronagraph at 7.5 $λ/D$. The new iEFC method has been demonstrated to work in numerical and lab experiments. It is a method that can be empirically calibrated and it can achieve deep contrast. This makes it a valuable approach for complex ground-based high-contrast imaging systems.
description: 13 pages, 12 figures accepted by A&A
Modeling migration changing according to alternative scenarios in the context of the global COVID-19 pandemic: the example of Ukraine
Creators: name: Britchenko, Igor
name: Maslii, Natalia
name: Demianchuk, Maryna
name: Bezpartochnyi, Maksym
Publisher: name: figshare
Year: 2022
Subjects: Economics

description: Global processes significantly affect the mobility of the population. In the context of geopolitical transformation, globalization and quarantine restrictions of Covid-19, it is important to predict the development of the migration movement of countries that are developing. Therefore, the article is aimed at modelling migration changes according to alternative scenarios using the example of Ukraine. The theoretical and methodological basis of the research is formed by a number of scientific works of leading scientists from different countries, statistical information on migration processes and socio-economic indicators of Ukraine’s development, economic, mathematical and scenario methods. In the course of the study, the main factors were identified that more affect the migration processes of Ukraine, taking into account the trends in the impact of Covid-19 on them. These include population size, life expectancy, GDP per capita, average monthly wages, and the volume of remittances from individuals to Ukraine. With the help of correlation-regression analysis, a multivariate econometric model of migration growth (reduction) has been built. This made it possible to study the absolute and relative influence of factors on the magnitude of the migration increase (decrease), determine the potential reserves for its increase (decrease), evaluate them using a comparative analysis and carry out predictive calculations of the volume of migration increase (decrease) in Ukraine.
NNLO Benchmarks for Gauge and Higgs Boson Production at TeV Hadron Colliders
Creators: name: Alekhin, S.
name: Blümlein, J.
name: Jimenez-Delgado, P.
name: Moch, S.
name: Reya, E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The inclusive production cross sections for $W^+, W^-$ and $Z^0$-bosons form important benchmarks for the physics at hadron colliders. We perform a detailed comparison of the predictions for these standard candles based on recent next-to-next-to-leading order (NNLO) parton parameterizations and new analyses including the combined HERA data, compare to all available experimental results, and discuss the predictions for present and upcoming RHIC, SPS, Tevatron and LHC energies. The rates for gauge boson production at the LHC can be rather confidently predicted with an accuracy of better than about 10% at NNLO. We also present detailed NNLO predictions for the Higgs boson production cross sections for Tevatron and LHC energies (1.96, 7, 8, 14 TeV), and propose a possible method to monitor the gluon distribution experimentally in the kinematic region close to the mass range expected for the Higgs boson. The production cross sections of the Higgs boson at the LHC are presently predicted with an accuracy of about 10--17%. The inclusion of the NNLO contributions is mandatory for achieving such accuracies since the total uncertainties are substantially larger at NLO.
description: 1 style file, 16 pages, 5 figures
Designing wavelength sampling for Fabry-Pérot observations. Information-based spectral sampling
Creators: name: Baso, C. J. Díaz
name: van der Voort, L. Rouppe
name: Rodríguez, J. de la Cruz
name: Leenaarts, J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Fabry-Pérot interferometers (FPIs) have become very popular in solar observations because they offer a balance between cadence, spatial resolution, and spectral resolution through a careful design of the spectral sampling scheme according to the observational requirements of a given target. However, an efficient balance requires knowledge of the expected target conditions, the properties of the chosen spectral line, and the instrumental characteristics. Our aim is to find a method that allows finding the optimal spectral sampling of FPI observations in a given spectral region. In this study, we propose a technique based on a sequential selection approach where a neural network is used to predict the spectrum (or physical quantities, if the model is known) from the information at a few points. Only those points that contain relevant information and improve the model prediction are included in the sampling scheme. The method adapts the separation of the points according to the spectral resolution of the instrument, the typical broadening of the spectral shape, and the typical Doppler velocities. The experiments using the CaII 8542 A line show that the resulting wavelength scheme naturally places more points in the core than in the wings, consistent with the sensitivity of the spectral line at each wavelength interval. The method can also be used as an accurate interpolator, to improve the inference of the magnetic field when using the weak-field approximation. Overall, this method offers an objective approach for designing new instrumentation or observing proposals with customized configurations for specific targets. This is particularly relevant when studying highly dynamic events in the solar atmosphere with a cadence that preserves spectral coherence without sacrificing much information.
description: 8 pages, 7 figures, accepted for publication in A&A
The SEGUE Stellar Parameter Pipeline. IV. Validation with an Extended Sample of Galactic Globular and Open Clusters
Creators: name: Smolinski, Jason P
name: Lee, Young Sun
name: Beers, Timothy C
name: An, Deokkeun
name: Bickerton, Steven J
name: Johnson, Jennifer A
name: Loomis, Craig P
name: Rockosi, Constance M
name: Sivarani, Thirupathi
name: Yanny, Brian
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Spectroscopic and photometric data for likely member stars of five Galactic globular clusters (M3, M53, M71, M92, and NGC 5053) and three open clusters (M35, NGC 2158, and NGC 6791) are processed by the current version of the SEGUE Stellar Parameter Pipeline (SSPP), in order to determine estimates of metallicities and radial velocities for the clusters. These results are then compared to values from the literature. We find that the mean metallicity () and mean radial velocity () estimates for each cluster are almost all within 2σ of the adopted literature values; most are within 1σ. We also demonstrate that the new version of the SSPP achieves small, but noteworthy, improvements in estimates at the extrema of the cluster metallicity range, as compared to a previous version of the pipeline software. These results provide additional confidence in the application of the SSPP for studies of the abundances and kinematics of stellar populations in the Galaxy.
description: 98 pages, 31 figures; accepted for publication in AJ
title: Ð¦Ð¸Ð»Ð¸Ð½Ð´Ñ Ð½Ð¸Ð·ÐºÐ¾Ð³Ð¾ Ð´Ð°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿Ð°ÑÐ¾ÑÑÑÐ±Ð¸Ð½Ð½Ð¾Ð¹ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð-1200-240
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Cylinder of low pressure of steam-turbine installation K-1200-240
Creators: name: Ð¨Ð°Ð¼ÑÐ¸Ð½Ð°, ÐÐ»ÑÐ³Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: Ð¿Ð°ÑÐ¾Ð²Ð°Ñ ÑÑÑÐ±Ð¸Ð½Ð°
ÑÐµÐ¿Ð»Ð¾Ð²Ð°Ñ ÑÑ ÐµÐ¼Ð°
Ð¿Ð°ÑÐ¾ÑÑÑÐ±Ð¸Ð½Ð½Ð°Ñ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ°
Ð³Ð°Ð·Ð¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ°ÑÑÑÑ
Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ½Ð¾Ð¹ ÑÐ°ÑÑÑÑ
Ð²Ð¸Ð±ÑÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ Ð´Ð¸Ð°Ð³ÑÐ°Ð¼Ð¼Ð°
steam turbine
thermal scheme
steam turbine installation
gas-dynamic calculation
strength calculation
vibration diagram

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¸Ð·Ð»Ð¾Ð¶ÐµÐ½Ð° Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ° ÑÐ¾Ð·Ð´Ð°Ð½Ð¸Ñ Ð¿Ð°ÑÐ¾ÑÑÑÐ±Ð¸Ð½Ð½Ð¾Ð¹ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ ÑÐ¶Ðµ ÑÑÑÐµÑÑÐ²ÑÑÑÐµÐ³Ð¾ Ð¿ÑÐ¾ÑÐ¾ÑÐ¸Ð¿Ð° Ð-1200-240 ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸ ÐÐÐ. ÐÐ°Ð½Ð¾ Ð¾Ð±ÑÐµÐµ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð¸Ðµ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ â Ð¿ÑÐ¾ÑÐ¾ÑÐ¸Ð¿Ð° Ð¸ Ð½ÐµÐºÐ¾ÑÐ¾ÑÑÐµ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð³Ð°Ð·Ð¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ°ÑÑÑÑ ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð¹ ÑÑÐµÐ¼Ñ Ð¸ Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ½Ð¾Ð¹ ÑÐ°ÑÑÑÑ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÑ ÑÐ·Ð»Ð¾Ð² ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸. ÐÐ·ÑÑÐµÐ½Ð° ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÑÐ¸Ñ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ¾Ð².
description: In given work the essence of technique for creating a steam turbine plant based on the existing prototype K-1200-240 LMZ structures is presented. A general description of the prototype installation and some structural features are given. Gas-dynamic calculation of the thermal scheme and strength calculation of structural elements are carried out. The technology of designing these elements has been studied.
Two-dimensional electron systems beyond the diffusive regime
Creators: name: Markos, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Transport properties of disordered electron system can be characterized by the conductance, Lyapunov exponent, or level spacing. Two additional parameters, $K_{11}$ and $γ$ were introduced recently which measure the non-homogeneity of the spatial distribution of the electron inside the sample. % [Phys. Rev. Lett. {\bf 82}, 4272 (1999)]. For the orthogonal, unitary and symplectic two dimensional disordered models, we investigate numerically the system size dependence of these parameters in the diffusive and localized regime. Obtained size and disorder dependence of $K_{11}$ and $γ$ is in agreement with with single parameter transport theory. In the localized regime, $γ\to 0$ independently on the physical symmetry of the model. In the diffusive regime, $γ$ equals to the symmetry parameter $β$. For the symplectic model we analyze the size dependence of $γ$ in the critical region of the metal-insulator transition and found the non-universal critical value $γ_c$.
Additional file 1 of A retrospective medical chart review of clinical outcomes in children and adolescents with attention-deficit/hyperactivity disorder treated with guanfacine extended-release in routine Canadian clinical practice
Creators: name: van Stralen, Judy
name: Gill, Simerpal K.
name: Reaume, Christopher J.
name: Handelman, Kenneth
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Pharmacology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Table S1. Patient disposition and sociodemographics. Table S2. Characteristics of GXR treatment from initiation through end of study.
The GALAH survey: New diffuse interstellar bands found in residuals of 872,000 stellar spectra
Creators: name: Vogrinčič, Rok
name: Kos, Janez
name: Zwitter, Tomaž
name: Traven, Gregor
name: Beeson, Kevin L.
name: Čotar, Klemen
name: Munari, Ulisse
name: Buder, Sven
name: Martell, Sarah L.
name: Lewis, Geraint F.
name: De Silva, Gayandhi M
name: Hayden, Michael R.
name: Bland-Hawthorn, Joss
name: D'Orazi, Valentina
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We use more than 872,000 mid-to-high resolution (R $\sim$ 20,000) spectra of stars from the GALAH survey to discern the spectra of diffuse interstellar bands (DIBs). We use four windows with the wavelength range from 4718 to 4903, 5649 to 5873, 6481 to 6739, and 7590 to 7890 Å, giving a total coverage of 967 Å. We produce $\sim$400,000 spectra of interstellar medium (ISM) absorption features and correct them for radial velocities of the DIB clouds. Ultimately, we combine the 33,115 best ISM spectra into six reddening bins with a range of $0.1 \,\mathrm{mag} < E\mathrm{(B-V)} < 0.7\, \mathrm{mag}$. A total of 183 absorption features in these spectra qualify as DIBs, their fitted model parameters are summarized in a detailed catalogue. From these, 64 are not reported in the literature, among these 17 are certain, 14 are probable and 33 are possible. We find that the broad DIBs can be fitted with a multitude of narrower DIBs. Finally, we create a synthetic DIB spectrum at unit reddening which should allow us to narrow down the possible carriers of DIBs and explore the composition of the ISM and ultimately better model dust and star formation as well as to correct Galactic and extragalactic observations. The majority of certain DIBs show a significant excess of equivalent width when compared to reddening. We explain this with observed lines of sight penetrating more uniform DIB clouds compared to clumpy dust clouds.
description: 28 pages, 15 figures, 11 tables, accepted for publication in MNRAS
MaNGA integral-field stellar kinematics of LoTSS radio galaxies: Luminous radio galaxies tend to be slow rotators
Creators: name: Zheng, Xuechen
name: Röttgering, Huub
name: van der Wel, Arjen
name: Cappellari, Michele
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The radio jets of an active galactic nucleus (AGN) can heat up the gas around a host galaxy and quench star formation activity. The presence of a radio jet could be related to the evolutionary path of the host galaxy and may be imprinted in the morphology and kinematics of the galaxy. In this work, we use data from the Sloan Digital Sky Survey's Mapping Nearby Galaxies at Apache Point Observatory survey and the Low Frequency Array (LOFAR) Two-Metre Sky Survey as well as the National Radio Astronomy Observatory (NRAO) the Karl G. Jansky Very Large Array (VLA) Sky Survey and the Faint Images of the Radio Sky at Twenty Centimeter survey. We combine these integral field spectroscopic data and radio data to study the link between stellar kinematics and radio AGNs. We find that the luminosity-weighted stellar angular momentum $λ_{Re}$ is tightly related to the range of radio luminosity and the fraction of radio AGNs F radio present in galaxies, as high-luminosity radio AGNs are only in galaxies with a small $λ_{Re}$, and the $F_{radio}$ at a fixed stellar mass decreases with $λ_{Re}$. These results indicate that galaxies with stronger random stellar motions with respect to the ordered motions might be better breeding grounds for powerful radio AGNs. This would also imply that the merger events of galaxies are important in the triggering of powerful radio jets in our sample.
description: 10 pages,7 figures. Accepted in A&A
Photometric classification of QSOs from ALHAMBRA survey using random forest
Creators: name: Arroquia-Cuadros, Benjamin
name: Sanchez, Nestor
name: Gomez, Vicent
name: Blay, Pere
name: Martinez-Badenes, Vicent
name: Nieves-Seoane, Lorena
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context: Given the current big data era in Astronomy, machine learning based methods have being applied over the last years to identify or classify objects like quasars, galaxies and stars from full sky photometric surveys. Aims: Here we systematically evaluate the performance of Random Forests (RF) in classifying quasars using either magnitudes or colours, both from broad and narrow-band filters, as features. Methods: The working data consists of photometry from the ALHAMBRA Gold Catalogue that we cross-matched with the Sloan Digital Sky Survey (SDSS) and with the Million Quasars Catalogue (Milliquas) for objects labelled as quasars, galaxies or stars. A RF classifier is trained and tested to evaluate the effect on final accuracy and precision of varying the free parameters and the effect of using narrow or broad-band magnitudes or colours. Results: Best performances of the classifier yielded global accuracy and quasar precision around 0.9. Varying model free parameters (within reasonable ranges of values) has no significant effects on the final classification. Using colours instead of magnitudes as features results in better performances of the classifier, especially using colours from the ALHAMBRA Survey. Colours that contribute the most to the classification are those containing the near-infrared $JHK$ bands.
description: 7 pages including 6 figures and 3 tables. Accepted for publication in Astronomy and Astrophysics
Is GeV Emission from Gamma-Ray Bursts of External Shock Origin?
Creators: name: Maxham, Amanda
name: Zhang, Bin-Bin
name: Zhang, Bing
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent observations of Gamma-Ray Bursts (GRBs) by the Fermi Large Area Telescope (LAT) revealed a power law decay feature of the high energy emission (above 100 MeV), which led to the suggestion that it originates from a (probably radiative) external shock. We analyze four GRBs (080916C, 090510, 090902B and 090926A) jointly detected by Fermi LAT and Gamma-ray Burst Monitor (GBM), which have high quality lightcurves in both instrument energy bands. Using the MeV prompt emission (GBM) data, we can record the energy output from the central engine as a function of time. Assuming a constant radiative efficiency, we are able to track energy accumulation in the external shock using our internal/external shell model code. By solving for the early evolution of both an adiabatic and a radiative blastwave, we calculate the high energy emission lightcurve in the LAT band and compare it with the observed one for each burst. The late time LAT light curves after T90 can be well fit by the model. However, due to continuous energy injection into the blastwave during the prompt emission phase, the early external shock emission cannot account for the observed GeV flux level. The high energy emission during the prompt phase (before T90) is most likely a superposition of a gradually enhancing external shock component and a dominant emission component that is of an internal origin.
description: 5 pages, 2 figures, submitted to MNRAS letters
title: ÐÑÐ´Ð¶ÐµÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾ÐµÐºÑÐ¾Ð² Ð½Ð° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸ (Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ ÐÐ Â«ÐÐ¾Ð½ÑÐµÑÐ½ Ð¢Ð¸ÑÐ°Ð½-2Â»)
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Budgeting of projects at the enterprise (on the example of JSC "Concnrn Titan-2")
Creators: name: ÐÐ¾ÑÑÑÐ¸ÑÑÐ½Ð°, Ð¡Ð²ÐµÑÐ»Ð°Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: ÐºÐ»ÑÑÐµÐ²ÑÐµ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»Ð¸ Ð±ÑÐ´Ð¶ÐµÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ
Ð±ÑÐ´Ð¶ÐµÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾ÐµÐºÑÐ¾Ð²
ÑÐµÐ»Ð¸
ÑÑÐ°Ð¿Ñ Ð¸ ÑÐ¸Ð¿Ñ Ð±ÑÐ´Ð¶ÐµÑÐ° Ð¸ Ð±ÑÐ´Ð¶ÐµÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ
key indicators of budgeting
budgeting of projects
objectives
stages and types of budget and budgeting

description: Ð¦ÐµÐ»Ñ Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð° Ð½Ð° Ð¸Ð·ÑÑÐµÐ½Ð¸Ðµ Ð¿ÑÐ¾ÑÐµÑÑÐ° Ð±ÑÐ´Ð¶ÐµÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð½Ð° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸ Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ ÐÐ Â«ÐÐ¾Ð½ÑÐµÑÐ½ Ð¢Ð¸ÑÐ°Ð½-2Â».
ÐÐ»Ñ Ð´Ð¾ÑÑÐ¸Ð¶ÐµÐ½Ð¸Ñ ÑÐµÐ»Ð¸, Ð¸Ð·ÑÑÐµÐ½Ñ ÑÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð°ÑÐ¿ÐµÐºÑÑ Ð±ÑÐ´Ð¶ÐµÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ, ÑÑÐ°Ð¿Ñ, ÑÑÐ°Ð´Ð¸Ð¸ Ð¸ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÑÐ¸Ð¿Ñ Ð±ÑÐ´Ð¶ÐµÑÐ° Ð¸ Ð±ÑÐ´Ð¶ÐµÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ, Ð° ÑÐ°Ðº Ð¶Ðµ Ð´Ð¾ÑÑÐ¾Ð¸Ð½ÑÑÐ²Ð° Ð¸ Ð½ÐµÐ´Ð¾ÑÑÐ°ÑÐºÐ¸, Ð±ÑÐ»Ð° Ð¸Ð·ÑÑÐµÐ½Ð° ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ°Ñ Ð»Ð¸ÑÐµÑÐ°ÑÑÑÐ°.
ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐ¸Ð½Ð°Ð½ÑÐ¾Ð²ÑÑ Ð¾ÑÑÐµÑÐ¾Ð² Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ, Ð¾Ð±ÑÐµÐ¹ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸ Ð¸ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº, ÑÐ´ÐµÐ»Ð°Ð½ Ð²ÑÐ²Ð¾Ð´ Ð¾Ð± ÑÐ¸Ð½Ð°Ð½ÑÐ¾Ð²Ð¾Ð¹ ÑÑÑÐ¾Ð¹ÑÐ¸Ð²Ð¾ÑÑÐ¸, Ð²Ð½ÐµÑÐ½ÐµÐ¹ Ð¸ Ð²Ð½ÑÑÑÐµÐ½Ð½ÐµÐ¹ ÑÑÐµÐ´Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ. ÐÐ»Ñ ÑÑÐ¾Ð³Ð¾ Ð±ÑÐ»Ð° Ð¸Ð·ÑÑÐµÐ½Ð° Ð´Ð¾ÐºÑÐ¼ÐµÐ½ÑÐ°ÑÐ¸Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ.
ÐÐ° Ð¿ÑÐ¸Ð¼ÐµÑÐµ ÑÐ°Ð·Ð±Ð¸ÑÐ°ÐµÑÑÑ Ð¿ÑÐ¾ÑÐµÑÑ Ð±ÑÐ´Ð¶ÐµÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ° Ð¿Ð¾ ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÑÑÐ²Ñ Ð³Ð¾ÑÑÐ¸Ð½Ð¸ÑÑ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ ÐÐÐ Â«ÐÐ¾Ð½ÑÐµÑÐ½ Ð¢Ð¸ÑÐ°Ð½-2Â».
description: The purpose of the final qualifying work is aimed at studying the budgeting process the enterprise on the example of Concern Titan-2 JSC.
To achieve the goal, we studied the theoretical aspects of budgeting, the stages and the main types of budget and budgeting, as well as the advantages and disadvantages, the economic literature was studied. The analysis of the financial performance of the enterprise. For this, the enterprise documentation was studied.
On the example of exposing the budgeting process of the project for the construction of the enterprise of JSC Concern Titan-2.
Additional file 1 of Single-cell landscape of nuclear configuration and gene expression during stem cell differentiation and X inactivation
Creators: name: Bonora, Giancarlo
name: Ramani, Vijay
name: Singh, Ritambhara
name: Fang, He
name: Jackson, Dana L.
name: Srivatsan, Sanjay
name: Qiu, Ruolan
name: Lee, Choli
name: Trapnell, Cole
name: Shendure, Jay
name: Duan, Zhijun
name: Deng, Xinxian
name: Noble, William S.
name: Disteche, Christine M.
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: A file containing supplementary material including Supplementary Figures, Supplementary Tables, and a description of the Supplementary Video.
Dependence of microwave absorption properties on ferrite volume fraction in MnZn ferrite/rubber radar absorbing materials
Creators: name: Gama, Adriana M.
name: Rezende, Mirabel C.
name: Dantas, Christine C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the analysis of measurements of the complex magnetic permeability ($μ_r$) and dielectric permittivity ($ε_r$) spectra of a rubber radar absorbing material (RAM) with various MnZn ferrite volume fractions. The transmission/reflection measurements were carried out in a vector network analyzer. Optimum conditions for the maximum microwave absorption were determined by substituting the complex permeability and permittivity in the impedance matching equation. Both the MnZn ferrite content and the RAM thickness effects on the microwave absorption properties, in the frequency range of 2 to 18 GHz, were evaluated. The results show that the complex permeability and permittivity spectra of the RAM increase directly with the ferrite volume fraction. Reflection loss calculations by the impedance matching degree (reflection coefficient) show the dependence of this parameter on both thickness and composition of RAM.
description: 9 pages, 6 figures; accepted for the Journal of Magnetism and Magnetic Materials
Scattering Parameter Measurements of the Long Wavelength Array Antenna and Front End Electronics
Creators: name: DiLullo, Christopher
name: Reeve, Whitham D.
name: Hicks, Brian C.
name: Dowell, Jayce
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present recent 2-port vector network analyzer (VNA) measurements of the complete set of scattering parameters for the antenna used within the Long Wavelength Array (LWA) and the associated front end electronics (FEEs). Full scattering parameter measurements of the antenna yield not only the reflection coefficient for each polarization, S11 and S22, but also the coupling between polarizations, S12 and S21. These had been previously modeled using simulations, but direct measurements had not been obtained until now. The measurements are used to derive a frequency dependent impedance mismatch factor (IMF) which represents the fraction of power that is passed through the antenna-FEE interface and not reflected due to a mismatch between the impedance of the antenna and the impedance of the FEE. We also present results from a two antenna experiment where each antenna is hooked up to a separate port on the VNA. This allows for cross-antenna coupling to be measured for all four possible polarization combinations. Finally, we apply the newly measured IMF and FEE forward gain corrections to LWA data to investigate how well they remove instrumental effects.
description: 16 pages, 12 figures, Accepted for publication in Publications of the Astronomical Society of the Pacific
Mott Insulator to Superfluid transition in Bose-Bose mixtures in a two-dimensional lattice
Creators: name: Guglielmino, M.
name: Penna, V.
name: Capogrosso-Sansone, B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We perform a numeric study (Worm algorithm Monte Carlo simulations) of ultracold two-component bosons in two-dimensional optical lattices. We study how the Mott insulator to superfluid transition is affected by the presence of a second superfluid bosonic species. We find that, at fixed interspecies interaction, the upper and lower boundaries of the Mott lobe are differently modified. The lower boundary is strongly renormalized even for relatively low filling factor of the second component and moderate (interspecies) interaction. The upper boundary, instead, is affected only for large enough filling of the second component. Whereas boundaries are renormalized we find evidence of polaron-like excitations. Our results are of interest for current experimental setups.
description: 4 pages, 3 figures, accepted as PRA Rapid Communication
Additional file 3 of Single-cell landscape of nuclear configuration and gene expression during stem cell differentiation and X inactivation
Creators: name: Bonora, Giancarlo
name: Ramani, Vijay
name: Singh, Ritambhara
name: Fang, He
name: Jackson, Dana L.
name: Srivatsan, Sanjay
name: Qiu, Ruolan
name: Lee, Choli
name: Trapnell, Cole
name: Shendure, Jay
name: Duan, Zhijun
name: Deng, Xinxian
name: Noble, William S.
name: Disteche, Christine M.
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 3: Review history.
Role of Polaron Pair Diffusion and Surface Losses in Organic Semiconductor Devices
Creators: name: Strobel, T.
name: Deibel, C.
name: Dyakonov, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By applying Monte Carlo simulations we found that the extraction of bound polaron pairs (PP) at the electrodes is an important loss factor limiting the efficiency of organic optoelectronic and photovoltaic devices. Based upon this finding, we developed a unified analytic model consisting of exact Onsager theory, describing the dissociation of PP in organic donor-acceptor heterojunctions, the Sokel-Hughes model for the extraction of free polarons at the electrodes, as well as of PP diffusion leading to the aforementioned loss mechanism, which was not considered previously. Our approach allows to describe the simulation details on a macroscopic scale and to gain fundamental insights, which is important in view of developing an optimized photovoltaic device configuration.
description: 4 pages, 4 figures. Accepted by Phys. Rev. Lett
$α$ + core structure described with an additional interaction in the nuclear matter saturation region
Creators: name: Souza, M. A.
name: Miyake, H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In a phenomenological approach, the $α$ + core structure is investigated in the $^{20}$Ne, $^{44}$Ti, $^{94}$Mo, $^{104}$Te, and $^{212}$Po nuclei through the local potential model using a double-folding nuclear potential with effective nucleon-nucleon interaction of M3Y + $c_{\mathrm{sat}}δ(s)$ type, where the term $c_{\mathrm{sat}}δ(s)$ acts only between the saturation regions of $α$-cluster and core. Properties such as energy levels, $α$-widths, $B(E2)$ transition rates, and half-lives are calculated, and good level of agreement with experimental data is obtained in general. It is shown the inclusion of the term $c_{\mathrm{sat}}δ(s)$ is determinant for a better description of the experimental energy levels compared to the ground state bands produced with the simple M3Y interaction. The properties calculated for $^{104}$Te reinforce the superallowed $α$-decay feature for this nucleus, as indicated in previous studies.
description: 13 pages, 6 figures. Accepted for publication in The European Physical Journal A
Understanding adherence to adjuvant endocrine therapy in breast cancer survivors
Creators: name: Lambert, Leah Kimberley
Publisher: name: University of British Columbia
Year: 2019

description: Background: Adjuvant endocrine therapy (AET) is highly efficacious, significantly reducing breast cancer recurrence and mortality for women with hormone receptor-positive breast cancer. Yet, many women do not adhere to prescribed AET. The purpose of this study was to explore breast cancer survivors’ and healthcare providers’ (HCPs) experiences and perspectives related to AET and adherence. Methods: This study explored personal, social, and structural factors influencing breast cancer survivors’ AET adherence, including an integrative review of patient-reported factors associated with AET adherence and two interpretive description studies with breast cancer survivors prescribed AET and with HCPs who care for women undergoing AET. Findings: The integrative review summarized patient-reported factors associated with AET adherence, including side effects, necessity beliefs, self-efficacy, the patient-HCP relationship, social support, and continuity of follow-up care. Interviews with 22 breast cancer survivors revealed that they struggled with persistence with AET, which they described as a balancing act between quantity and quality of life that was influenced by several different, yet connected, factors. Interviews with 14 HCPs highlighted unique experiences and challenges they faced in providing care to women undergoing AET. They described the nature of AET discussions, challenges in transitioning women to primary care, the difficulty addressing AET-related side effects, and dealing with AET discontinuation. HCPs made key recommendations for improving AET adherence, including developing sustainable models of care for delivering high-quality, cost-effective care to breast cancer survivors. Conclusion: The study findings highlight the multifaceted nature of AET adherence from the perspectives of breast cancer survivors and HCPs. Improving understanding of real-world factors influencing AET adherence is an important step in developing effective patient- and HCP-informed interventions. The development and evaluation of supportive care strategies that address the AET-related challenges experienced by breast cancer survivors and HCPs are needed to potentially increase the quality of women’s lives, improve AET adherence, and ultimately, disease-free survival.
Mean first passage time of active fluctuating membrane with stochastic resetting
Creators: name: Singha, Tapas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the mean first passage time of a one-dimensional active fluctuating membrane that is stochastically returned to the same flat initial condition at a finite rate. We start with a Fokker Planck equation to describe the evolution of the membrane coupled with an Ornstein-Uhlenbeck type of active noise. Using the method of characteristics, we solve the equation and obtain the joint distribution of the membrane height and active noise. In order to obtain the mean first-passage time (MFPT), we further obtain a relation between the MFPT and a propagator that includes stochastic resetting. The derived relation is then used to calculate it analytically. Our studies show that the MFPT increases with a larger resetting rate and decreases with a smaller rate, i.e., there is an optimal resetting rate. We compare the results in terms of MFPT of the membrane with active and thermal noises for different membrane properties. The optimal resetting rate is much smaller with active noise compared to thermal. When the resetting rate is much lower than the optimal rate, we demonstrate how the MFPT scales with resetting rates, distance to the target, and the properties of the membranes.
description: 12 pages, 4 figures; accepted in Physical Review E
title: NRWs Verbraucherinnen und Verbraucher im Internet der Dinge
title: Vom vertrauenden zum verletzlichen Verbraucher?
titleType: Subtitle
Creators: name: Schuhen, Michael
name: Askari, Minoubanu
name: Schürkmann, Susanne
Publisher: name: vz-nrw (Verbraucherzentrale Nordrhein-Westfalen e. V.)
Year: 2019

description: Vertrauen und Kompetenz sind zwei grundlegende Voraussetzungen für die Nutzung des Internet der Dinge (IoT). Welche Rolle spielen Vertrauen und individuelle Kompetenz für eine selbstbestimmte und reflektierte Nutzungsweise IoT-fähiger Geräte? Im Kontext digitaler Handlungssituationen sollten Verbraucherinnen und Verbraucher ihre Entscheidungskompetenz zeigen: Altersunabhängig liegen keine flächendeckenden Kompetenzausprägungen vor, die ihnen eine umfassende und reflektierte Handlungsfähigkeit im Internet der Dinge ermöglichen.
description: Beiträge zur Verbraucherforschung
Glauber dynamics for the quantum Ising model in a transverse field on a regular tree
Creators: name: Martinelli, Fabio
name: Wouts, Marc
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary: 60K35, Secondary: 82C10

description: Motivated by a recent use of Glauber dynamics for Monte-Carlo simulations of path integral representation of quantum spin models [Krzakala, Rosso, Semerjian, and Zamponi, Phys. Rev. B (2008)], we analyse a natural Glauber dynamics for the quantum Ising model with a transverse field on a finite graph $G$. We establish strict monotonicity properties of the equilibrium distribution and we extend (and improve) the censoring inequality of Peres and Winkler to the quantum setting. Then we consider the case when $G$ is a regular $b$-ary tree and prove the same fast mixing results established in [Martinelli, Sinclair, and Weitz, Comm. Math. Phys. (2004)] for the classical Ising model. Our main tool is an inductive relation between conditional marginals (known as the "cavity equation") together with sharp bounds on the operator norm of the derivative at the stable fixed point. It is here that the main difference between the quantum and the classical case appear, as the cavity equation is formulated here in an infinite dimensional vector space, whereas in the classical case marginals belong to a one-dimensional space.
Bundle-type methods for dual atomic pursuit
Creators: name: Fan, Zhenan
Publisher: name: University of British Columbia
Year: 2019

description: We discuss a type of structured optimization problem called atomic pursuit, where the aim is to assemble a solution, using a given set of (possibly uncountably infinite) atoms, to fit a model to data, popularized in compressed sensing and machine learning. The solutions to atomic pursuit problems can be formed as the sum of a few atoms, which means they lie on low-dimensional facets of the convex hull of the atomic set and the gauges induced by the convex hull of the atomic sets have been shown to promote atomic sparsity. Examples include well-studied cases such as one norm promoting general sparsity and nuclear norm promoting low rankness. In this thesis, we examine the gauge dual of atomic pursuit and show that the support of the primal solution can be recovered from the dual solution. In particular, a two-stage algorithm based on gauge duality and bundle-type methods is proposed. The first stage discovers the optimal atomic support for the primal problem by solving a sequence of approximations of the dual problem using a bundle-type method, which geometrically can be seen as producing a sequence of inscribing subsets of the atomic set. The second stage recovers the approximate primal solution using the atoms discovered in the first stage. We show that these methods lead to efficient and scalable semidefinite optimization methods with low-rank solutions, producing a fast, scalable, SDP solver for phase retrieval and graph problems.
Formation and Evolution of Coherent Structures in 3D Strongly Turbulent Magnetized Plasmas
Creators: name: Vlahos, Loukas
name: Isliker, Heinz
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We review the current literature on the formation of Coherent Structures (CoSs) in strongly turbulent 3D magnetized plasmas. CoSs (Current Sheets (CS), magnetic filaments, large amplitude magnetic disturbances, vortices, and shocklets) appear intermittently inside a turbulent plasma and are collectively the locus of magnetic energy transfer (dissipation) into particle kinetic energy, leading to heating and/or acceleration of the latter. CoSs and especially CSs are also evolving and fragmenting, becoming locally the source of new clusters of CoSs. Strong turbulence can be generated by the nonlinear coupling of large amplitude unstable plasma modes, by the explosive reorganization of large scale magnetic fields, or by the fragmentation of CoSs. A small fraction of CSs inside a strongly turbulent plasma will end up reconnecting. Magnetic Reconnection (MR) is one of the potential forms of energy dissipation of a turbulent plasma. Analysing the evolution of CSs and MR in isolation from the surrounding CoSs and plasma flows may be convenient for 2D numerical studies, but it is far from a realistic modeling of 3D astrophysical, space and laboratory environments, where strong turbulence can be exited, as e.g. in the solar wind, the solar atmosphere, solar flares and Coronal Mass Ejections (CMEs), large scale space and astrophysical shocks, the magnetosheath, the magnetotail, astrophysical jets, Edge Localized Modes (ELMs) in confined laboratory plasmas (TOKAMAKS), etc.
description: 27 pages, 31 figures; review; accepted for publication in Physics of Plasmas 2023
Stärkung von Selbstorganisation und Autonomie der Beschäftigten in der Pflege durch eine digitalisierte kollaborative Dienstplanung
Creators: name: Kubek, Vanessa
name: Blaudszun-Lahm, Annette
name: Velten, Sebastian
name: Schroeder, Rasmus
name: Uhde, Alarith
name: Dörler, Ursula
name: Schlicker, Nadine
Publisher: name: Universitätsbibliothek Siegen
Year: 2019
Subjects: subject: 330 Wirtschaft
subject: Schichtarbeit
subject: Pflegenotstand
subject: Fachkräftemangel
subject: Pflegebranche
subject: Shortage of skilled workers
subject: Nursing industry
subject: Shift work
subject: Nursing shortage
subject: Schichtarbeit
subject: Arbeitskräftemangel
subject: Pflegeberuf
subject: Pflegenotstand

description: Die Pflegebranche leidet unter einem massiven Fachkräftemangel. Der Pflegeberuf als solcher wird als wenig attraktiv wahrgenommen: physische Belastungen, Schichtdienst, vergleichsweise geringes Gehalt sind – neben weiteren Faktoren – dafür ausschlaggebend. Negative Auswirkungen von Schichtarbeit können dadurch reduziert werden, dass das Autonomieerleben der Mitarbeitenden erhöht wird. Sie haben nicht mehr das Gefühl, dass (neben ihrem Berufsleben auch) über ihr Privatleben verfügt wird, sondern sie haben selbst die Chance, die Balance herzustellen und zu gestalten. Diesen Gestaltungsspielraum adressiert das Projekt GamOR („GameofRoster“): mit Hilfe einer kollaborativen, d.h. gemeinschaftlichen, und zugleich digitalisierten Dienstplanung soll die Zufriedenheit der Pflegekräfte erhöht werden. Der Artikel beschreibt die Herangehensweise im Projekt GamOR, die im Hinblick auf digitalgestützte Veränderungsprojekte insgesamt viel Übertragungspotential bietet.
Time Crystals transforming Frequency Combs in Tunable Photonic Oscillators
Creators: name: Himona, Georgia
name: Kovanis, Vassilios
name: Kominis, Yannis
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The response of a tunable photonic oscillator, consisting of an Optically Injected Semiconductor Laser, under an injected Frequency Comb is considered with the utilization of the concept of the Time Crystal that has been widely used for the study of driven nonlinear oscillators in the context of mathematical biology. The dynamics of the original system reduce to a radically simple one-dimensional circle map with properties and bifurcations determined by the specific features of the Time Crystal fully describing the phase response of the limit cycle oscillation. The circle map is shown to accurately model the dynamics of the original nonlinear system of ordinary differential equations and capable for providing conditions for resonant synchronization resulting to output frequency combs with tunable shape characteristics. Such theoretical developments can have potential for significant photonic signal processing applications.
description: 19 pages, 9 figures
Viscous lock-exchange in rectangular channels
Creators: name: Martin, Jerome
name: Rakotomalala, Nicole
name: Talon, Laurent
name: Salin, Dominique
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In a viscous lock-exchange gravity current, which describes the reciprocal exchange of two fluids of different densities in a horizontal channel, the front between two Newtonian fluids spreads as the square root of time. The resulting diffusion coefficient reflects the competition between the buoyancy driving effect and the viscous damping, and depends on the geometry of the channel. This lock-exchange diffusion coefficient has already been computed for a porous medium, a 2D Stokes flow between two parallel horizontal boundaries separated by a vertical height, H, and, recently, for a cylindrical tube. In the present paper, we calculate it, analytically, for a rectangular channel (horizontal thickness b, vertical height, H) of any aspect ratio (H/b) and compare our results with experiments in horizontal rectangular channels for a wide range of aspect ratios (1/10-10). We also discuss the 2D Stokes-Darcy model for flows in Hele-Shaw cells and show that it leads to a rather good approximation, when an appropriate Brinkman correction is used.
description: 16 pages,7 figures
The peculiar variable X-ray spectrum of the active galactic nucleus PKS 2005-489
Creators: name: Chase, Owen
name: McBride, Felicia
name: Gokus, Andrea
name: Lucchini, Matteo
name: Zhang, Haocheng
name: Ojha, Roopesh
name: Fox, Derek B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: PKS 2005-489 is a well-known, bright southern BL Lac object that has been detected up to TeV energies. In a low-flux state it exhibits the expected multiwavelength double-peaked spectrum in the radio -- $γ$-ray band. The high-flux state shows extreme flux variations in the X-ray band with a hardening as well as a peculiar curved feature in the spectrum. Thus far, PKS 2005-489 is the only source to exhibit such a feature. To study the X-ray variability further, we obtained the first hard X-ray spectrum of the source with NuSTAR. We compare quasi-simultaneous radio, optical, UV, soft and hard X-ray, and $γ$-ray data of PKS 2005-489 to archival data in order to study its broadband behavior. We find a very consistent quiet state in the SED, with little variation in spectral shape or flux between the 2012 and 2020 data. A possible explanation for the peculiar X-ray spectrum in the flaring state is an additional component in the jet, possibly accelerated via magnetic reconnection, that is not co-spatial to the low-flux state emission region.
Thermal Casimir-Polder shifts in Rydberg atoms near metallic surfaces
Creators: name: Crosse, J. A.
name: Ellingsen, Simen Å.
name: Clements, Kate
name: Buhmann, Stefan Y.
name: Scheel, Stefan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The Casimir-Polder (CP) potential and transition rates of a Rydberg atom above a plane metal surface at finite temperature are discussed. As an example, the CP potential and transition rates of a rubidium atom above a copper surface at room temperature is computed. Close to the surface we show that the quadrupole correction to the force is significant and increases with increasing principal quantum number n. For both the CP potential and decay rates one finds that the dominant contribution comes from the longest wavelength transition and the potential is independent of temperature. We provide explicit scaling laws for potential and decay rates as functions of atom-surface distance and principal quantum number of the initial Rydberg state.
description: Updated to journal version with corrected figures. 4 Pages, 2 figures