cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The merger rates and sizes of galaxies across the peak epoch of star formation from the HiZELS survey
Creators: name: Stott, John P.
name: Sobral, David
name: Smail, Ian
name: Bower, Richard
name: Best, Philip N.
name: Geach, James E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use the HiZELS narrow-band H-alpha survey in combination with CANDELS, UKIDSS and WIRDS near-infrared imaging, to investigate the morphologies, merger rates and sizes of a sample of H-alpha emitting galaxies in the redshift range z=0.40 - 2.23, an epoch encompassing the rise to the peak of the star formation rate density. Merger rates are estimated from space- and ground-based imaging using the M20 coefficient. To account for the increase in the specific star-formation rate (sSFR) of the star forming `main-sequence' with redshift, we normalise the star-formation rate of galaxies at each epoch to the typical value derived from the H-alpha luminosity function. Once this trend in sSFR is removed we see no evidence for an increase in the number density of star-forming galaxies or the merger rate with redshift. We thus conclude that neither is the main driver of the enhanced star-formation rate density at z=1-2, with secular processes such as instabilities within efficiently fuelled, gas-rich discs or multiple minor mergers the most likely alternatives. However, we find that 40-50% of starburst galaxies, those with enhanced specific star formation at their epoch, are major mergers and this fraction is redshift independent. Finally, we find the surprising result that the typical size of a star-forming galaxy of a given mass does not evolve across the redshift range considered, suggesting a universal size-mass relation. Taken in combination, these results indicate a star-forming galaxy population that is statistically similar in physical size, merger rate and mass over the 6 Gyr covered in this study, despite the increase in typical sSFR.
description: MNRAS in press
Quasi-pinning and entanglement in the lithium isoelectronic series
Creators: name: Benavides-Riveros, Carlos L.
name: Gracia-Bondía, José M.
name: Springborg, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The Pauli exclusion principle gives an upper bound of 1 on the natural occupation numbers. Recently there has been an intriguing amount of theoretical evidence that there is a plethora of additional generalized Pauli restrictions or (in)equalities, of kinematic nature, satisfied by these numbers. Here for the first time a numerical analysis of the nature of such constraints is effected in real atoms. The inequalities are nearly saturated, or quasi-pinned. For rank-six and rank-seven approximations for lithium, the deviation from saturation is smaller than the lowest occupancy number. For a rank-eight approximation we find well-defined families of saturation conditions.
description: 22 pages, 6 figures, minor changes, references added
Transparent ion trap with integrated photodetector
Creators: name: Eltony, Amira M.
name: Wang, Shannon X.
name: Akselrod, Gleb M.
name: Herskind, Peter F.
name: Chuang, Isaac L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Fluorescence collection sets the efficiency of state detection and the rate of entanglement generation between remote trapped ion qubits. Despite efforts to improve light collection using various optical elements, solid angle capture is limited to ~10% for implementations that are scalable to many ions. We present an approach based on fluorescence detection through a transparent trap using an integrated photodetector, combining collection efficiency approaching 50% with scalability. We microfabricate transparent surface traps with indium tin oxide and verify stable trapping of single ions. The fluorescence from a cloud of ions is detected using a photodiode sandwiched with a transparent trap.
description: 3 pages, 4 figures, submitted to APL, (v2) reference added
On twinning in smectic crystals
Creators: name: Marchenko, V. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: It is shown that mechanical twinning in smectic crystals is possible. The structure of the boundary of twins for a small disorientation of crystallites is determined. The periodic twin structure, which should appear at the tension of the smectic layer, is proposed.
Updated Nearby Galaxy Catalog
Creators: name: Karachentsev, Igor D.
name: Makarov, Dmitry I.
name: Kaisina, Elena I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an all-sky catalog of 869 nearby galaxies, having individual distance estimates within 11 Mpc or corrected radial velocities V_{LG} < 600 km/s. The catalog is a renewed and expanded version of the "Catalog of Neighboring Galaxies" by Karachentsev et al. (2004). It collects data on the following observables for the galaxies: angular diameters, apparent magnitudes in FUV-, B-, and K_s- bands, H_alpha and HI fluxes, morphological types, HI-line widths, radial velocities and distance estimates. In this Local Volume (LV) sample 108 dwarf galaxies remain to be still without measured radial velocities. The catalog yields also calculated global galaxy parameters: linear Holmberg diameter, absolute B-magnitude, surface brightness, HI-mass, stellar mass estimated via K-band luminosity, HI rotational velocity corrected for galaxy inclination, indicative mass within the Holmberg radius, and three kinds of "tidal index", which quantify the local density environment. The catalog is supplemented with the data based on the local galaxies (http://www.sao.ru/lv/lvgdb), which presents their optical and available H_alpha images, as well as other service. We briefly discuss the Hubble flow within the LV, and different scaling relations that characterize galaxy structure and global star formation in them. We also trace the behavior of the mean stellar mass density, HI-mass density and star formation rate density within the considered volume.
description: 6 tables, 20 figures. The electronic version of tables as well as the article with figures in high resolution are available at the Local Volume Galaxies database web-page http://www.sao.ru/lv/lvgdb/
title: Методология повышения эффективности технического сервиса городских автобусов
Creators: name: ELS IPR BOOKS
Publisher: name: Саратовский государственный технический университет имени Ю.А. Гагарина, ЭБС АСВ
Year: 2022

description: В монографии приведены результаты анализа транспортных проблем мегаполисов, методологии их решении. Дано теоретическое обоснование и экспериментальная проверка влияния факторов обеспеченности предприятий производственно-технической базой на эффективность пассажирских перевозок. Обоснована целесообразность концентрации, централизации, специализации и кооперации при производстве технического обслуживания и ремонта. На базе положений теорий массового обслуживания, предельной полезности синергетики обоснована региональная логистическая сеть централизованных специализированных производств. Для специалистов, занимающихся вопросами эксплуатации автомобильного транспорта и транспортно-технологических комплексов, а также аспирантов и студентов при изучении соответствующих учебных курсов.
Using Light Charged Particles to Probe the Asymmetry Dependence of the Nuclear Caloric Curve
Creators: name: McIntosh, Alan B.
name: Bonasera, Aldo
name: Kohley, Zachary
name: Cammarata, Paul J.
name: Hagel, Kris
name: Heilborn, Lauren
name: Mabiala, Justin
name: May, Larry W.
name: Marini, Paola
name: Raphelt, Andrew
name: Souliotis, George A.
name: Wuenschel, Sara
name: Zarrella, Andrew
name: Yennello, Sherry J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Recently, we observed a clear dependence of the nuclear caloric curve on neutron-proton asymmetry $\frac{N-Z}{A}$ through examination of fully reconstructed equilibrated quasi-projectile sources produced in heavy ion collisions at E/A = 35 MeV. In the present work, we extend our analysis using multiple light charged particle probes of the temperature. Temperatures are extracted with five distinct probes using a kinetic thermometer approach. Additionally, temperatures are extracted using two probes within a chemical thermometer approach (Albergo method). All seven measurements show a significant linear dependence of the source temperature on the source asymmetry. For the kinetic thermometer, the strength of the asymmetry dependence varies with the probe particle species in a way which is consistent with an average emission-time ordering.
description: 7 pages, 4 figures
title: Общевоенная и тактическая подготовка
Creators: name: ELS IPR BOOKS
Publisher: name: Саратовский государственный технический университет имени Ю.А. Гагарина, ЭБС АСВ
Year: 2021

description: Данное пособие соответствует учебным программам подготовки кур-сантов военных учебных центров при высших учебных заведениях по дис-циплинам: «Общая тактика», «Огневая подготовка», «Радиационная, химическая, биологическая защита», «Военная топография», «Подготовка по связи», «Строевая подготовка», «Общевоинские уставы». В основу пособия положены требования боевых уставов Сухопутных войск и другие действующие руководства и наставления по подготовке, организации и ведению современного общевойскового боя подразделениями и их всестороннего обеспечения. Авторы пособия ставили своей задачей раскрыть основные вопросы подготовки, организации и ведения современного общевойскового боя и обеспечения боевых действий, стремясь дать сведения по огневой подготовке, военной топографии и радиационной, химической, биологической защите частей и подразделений в доходчивом и удобном для читателей виде. Материал систематизирован по разделам. Учебник рассчитан на курсантов военных учебных центров при высших учебных заведениях, обучающихся по военно-учетной специальности «Радиолокационные станции (комплексы)» (ВУС 500).
title: Синергетика в нефтегазовом деле
Creators: name: ELS IPR BOOKS
Publisher: name: Саратовский государственный технический университет имени Ю.А. Гагарина, ЭБС АСВ
Year: 2021

description: В учебном пособии рассматриваются вопросы, связанные с обеспечением комплексного использования передовых достижений естественных наук, инфокоммуникационных технологий и прикладных программных комплексов для оптимизации процессов и процедур разработки и эксплуатации нефтегазовых месторождений, а также воспроизводства минерально-сырьевой базы. Предназначено для преподавателей и студентов высших учебных заведений и специалистов, занимающихся разработкой и эксплуатацией месторождений углеводородов.
Anderson Localization of cold atomic gases with effective spin-orbit interaction in a quasiperiodic optical lattice
Creators: name: Zhou, Lu
name: Pu, Han
name: Zhang, Weiping
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We theoretically investigate the localization properties of a spin-orbit coupled spin-1/2 particle moving in a one-dimensional quasiperiodic potential, which can be experimentally implemented using cold atoms trapped in a quasiperiodic optical lattice potential and external laser fields. We present the phase diagram in the parameter space of the disorder strength and those related to the spin-orbit coupling. The phase diagram is verified via multifractal analysis of the atomic wavefunctions and the numerical simulation of diffusion dynamics. We found that spin-orbit coupling can lead to the spectra mixing (coexistence of extended and localized states) and the appearance of mobility edges.
description: 8 pages, 7 figures, to be published in Phys. Rev. A
Anisotropic Cosmic Ray Diffusion and its Implications for Gamma-Ray Astronomy
Creators: name: Giacinti, G.
name: Kachelriess, M.
name: Semikoz, D. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Analyses of TeV-PeV cosmic ray (CR) diffusion around their sources usually assume either isotropic diffusion or anisotropic diffusion due to the regular Galactic magnetic field. We show that none of them are adequate on distances smaller than the maximal scale Lmax ~ 100 pc of fluctuations in the turbulent interstellar magnetic field. As a result, we predict anisotropic gamma-ray emissions around CR proton and electron sources, even for uniform densities of target gas. The centers of extended emission regions may have non-negligible offsets from their sources, leading to risks of misidentification. Gamma-rays from CR filaments have steeper energy spectra than those from surrounding regions. We point out that gamma-ray telescopes can be used in the future as a new way to probe and deduce the parameters of the interstellar magnetic field.
description: 13 pages (2 columns), 9 figures. Published in Physical Review D
title: Полногеномный поиск ассоциаций однонуклеотидных замен с глубиной груди у овец породы российский мясной меринос
Creators: name: Яцык, Олеся Андреевна
name: Криворучко, Александр Юрьевич
Publisher: name: ФГБНУ КНЦЗВ
Year: 2021

description: В работе представлены результаты исследований, посвященных поиску однонуклео-тидных полиморфизмов и генов-кандидатов, ассоциированных с глубиной груди у овец по-роды российский мясной меринос. Генотипирование животных выполнялось с использова-нием ДНК-биочипов Ovine Infinium HD BeadChip 600K, полногеномный анализ ассоциаций вы-полнялся с использованием программного обеспечения PLINK V.1.07. В результате проведен-ных исследований достоверные ассоциации выявлены для замены rs419337278, расположен-ной на 15 хромосоме. Определение местоположения анализируемой замены относительно новейшей аннотации генома Oar_rambouillet_v1.0 позволило выявить новый ген кандидат, ассоциированный с глубиной груди у овец – LOC114118511 - anoctamin-3-like.
Ключевые слова: овцы; гены; генетический полиморфизм; генетика животных; гене-тические маркеры
On Max-SINR Receiver for Hexagonal Multicarrier Transmission Over Doubly Dispersive Channel
Creators: name: Xu, Kui
name: Xu, Youyun
name: Xia, Xiaochen
name: Zhang, Dongmei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, a novel receiver for Hexagonal Multicarrier Transmission (HMT) system based on the maximizing Signal-to-Interference-plus-Noise Ratio (Max-SINR) criterion is proposed. Theoretical analysis shows that the prototype pulse of the proposed Max-SINR receiver should adapt to the root mean square (RMS) delay spread of the doubly dispersive (DD) channel with exponential power delay profile and U-shape Doppler spectrum. Simulation results show that the proposed Max-SINR receiver outperforms traditional projection scheme and obtains an approximation to the theoretical upper bound SINR performance within the full range of channel spread factor. Meanwhile, the SINR performance of the proposed prototype pulse is robust to the estimation error between the estimated value and the real value of time delay spread.
description: 6 pages. The paper has been published in Proc. IEEE GLOBECOM 2012. Copyright transferred to IEEE. arXiv admin note: text overlap with arXiv:1212.5791
Strengthening buildings for seismic activity
Creators: name: YETER GUNAL, AYŞE
name: ALDAMEESH, AHMAD
Publisher: name: figshare
Year: 2023
Subjects: Structural engineering
Civil engineering not elsewhere classified

description: The vulnerability of buildings in earthquake-prone regions and their rehabilitation pose a major challenge. Over the years, various strengthening techniques have been developed to address this problem. However, most of these methods require occupants to leave the building during the renovation, which involves significant inconvenience. The studies presented in this discussion provide important insights into the various methods for improving the seismic capacity of concrete structures. The effectiveness of various methods for improving the seismic performance of concrete buildings, such as external shear walls, fiber-reinforced polymer (FRP) panels, encasing columns in concrete shells, and reinforcing concrete structures with metal ties or tension nets, is investigated in this article. The installation of shear walls parallel to the exterior of the building significantly improved the load-bearing capacity and sway stiffness of the structures of RC. It was found that the retrofitted exterior shear walls behaved like a monolithic member of the structure.
title: Цифровизация жизненного цикла подвижного состава на автомобильном транспорте
Creators: name: ELS IPR BOOKS
Publisher: name: Саратовский государственный технический университет имени Ю.А. Гагарина, ЭБС АСВ
Year: 2022

description: В монографии представлены материалы по цифровизации жизненного цикла на автомобильном транспорте, включая вопросы создания цифровых двойников при проектировании транспортных средств, организации заказов и поставок запасных частей и комплектующих для производственного процесса с учетом современных технологий, принципов и специфики функционирования транспортных систем. Предназначается для специалистов в области управления транспортно-логистическими системами, технологиями транспортных процессов, технической эксплуатацией транспортных средств, а также для студентов, обучающихся по направлениям 23.03.01 (бакалавриат) и 23.04.01 (магистратура) «Технология транспортных процессов»; 23.03.03 (бакалавриат) и 23.04.03 (магистратура) «Эксплуатация транспортно-технологических машин и комплексов».
title: Экономическая безопасность фирмы
Creators: name: ELS IPR BOOKS
Publisher: name: Саратовский государственный технический университет имени Ю.А. Гагарина, ЭБС АСВ
Year: 2022

description: В учебном пособии по дисциплине «Экономическая безопасность фирмы» представлены задания по проведению семинарских и практических заданий, а также методические указания по их выполнению и решению задач, кейсов, анализу практических ситуаций; тестовые задания. Практически закрепляются теоретико-методические основы обеспечения экономической безопасности фирмы, рассмотрены вопросы оценки и обеспечения безопасности в различных сферах деятельности фирмы: финансовой, инвестиционной, инновационно-технологической, интеллектуальной, кадровой, логистической. Помимо указанной дисциплины, учебное пособие может быть использовано при изучении курсов «Экономическая безопасность», «Управление безопасностью объектов интеллектуальной собственности», «Безопасность в инвестиционной сфере», «Безопасность в инновационной и технологической сферах», «Экономическая и промышленная безопасность предприятий», «Логистические функции в системе экономической безопасности», «Основы и экономическая безопасность предпринимательской деятельности», «Диагностика и мониторинг экономической безопасности», «Экономическая безопасность на различных уровнях управления». Подготовлено в соответствии с требованиями Федерального государственного образовательного стандарта высшего образования. Предназначено для студентов, обучающихся по специальностям 38.05.01 «Экономическая безопасность», 38.05.02 «Таможенное дело», направлению 38.03.01 «Экономика». Учебное пособие представляет интерес для аспирантов, научных работников, руководителей различного уровня, а также специалистов, в той или иной степени занятых проблемами обеспечения экономической безопасности.
Computing with and without arbitrary large numbers
Creators: name: Brand, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences
subject: F.1.1; F.1.2; F.1.3; I.1.1
subject: 68Q05, 68Q10, 68Q15

description: In the study of random access machines (RAMs) it has been shown that the availability of an extra input integer, having no special properties other than being sufficiently large, is enough to reduce the computational complexity of some problems. However, this has only been shown so far for specific problems. We provide a characterization of the power of such extra inputs for general problems. To do so, we first correct a classical result by Simon and Szegedy (1992) as well as one by Simon (1981). In the former we show mistakes in the proof and correct these by an entirely new construction, with no great change to the results. In the latter, the original proof direction stands with only minor modifications, but the new results are far stronger than those of Simon (1981). In both cases, the new constructions provide the theoretical tools required to characterize the power of arbitrary large numbers.
description: 12 pages (main text) + 30 pages (appendices), 1 figure. Extended abstract. The full paper was presented at TAMC 2013. (Reference given is for the paper version, as it appears in the proceedings.)
title: Интеллектуальные системы и технологии в машино- и приборостроении
Creators: name: ELS IPR BOOKS
Publisher: name: Саратовский государственный технический университет имени Ю.А. Гагарина, ЭБС АСВ
Year: 2022

description: Приводятся сведения о развитии интеллектуальных систем и технологий и их применении для решения задач в различных областях науки, техники и производства. Рассматриваются модели представления знаний в интеллектуальных системах, основы теории интеллектуальных систем управления и технологии обработки знаний. Анализируются вопросы построения экспертных систем и приводится пример практического применения экспертной системы поддержки принятия решения при контроле и диагностировании высокоточных токарных модулей. Рассматриваются основы теории распознавания образов и ее практическое применение для выявления дефектов шлифованных деталей подшипников при автоматизированном вихретоковом контроле. Учебное пособие предназначено для студентов старших курсов и аспирантов машиностроительных направлений, а также представляет интерес для специалистов, занимающихся вопросами применения интеллектуальных систем и технологий в высокоточных наукоемких изделиях\nв машино- и приборостроении.
Carrier Frequency Offset Estimation Approach for Multicarrier Transmission on Hexagonal Time-Frequency Lattice
Creators: name: Xu, Kui
name: Ma, Wenfeng
name: Wu, Lianguo
name: Xie, Wei
name: Zhang, Dongmei
name: Xu, Youyun
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, a novel carrier frequency offset estimation approach, including preamble structure, carrier frequency offset estimation algorithm, is proposed for hexagonal multi-carrier transmission (HMCT) system. The closed-form Cramer-Rao lower bound of the proposed carrier frequency offset estimation scheme is given. Theoretical analyses and simulation results show that the proposed preamble structure and carrier frequency offset estimation algorithm for HMCT system obtains an approximation to the Cramer-Rao lower bound mean square error (MSE) performance over the doubly dispersive (DD) propagation channel.
description: 6 pages. The paper has been accepted for publication at the IEEE Wireless Communications and Networking Conference (WCNC) 2013, Shanghai, China, Apr. 2013. Copyright transferred to IEEE
title: Detecting operons from RNA-seq data using a convolutional and recurrent neural network architecture
Creators: name: Karaji, Rezvan
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: Operon is a characteristic of prokaryotic genomes that enables the co-regulation of adjacent genes. Identifying which genes belong to the same operon can help in understanding bacterial gene function and regulation, which can enhance, for instance, drug development and antibiotic resistance inhibition. There are numerous experimental and computational approaches for operon detection; however, many of the computational approaches have been developed for a specific target genome or require specific information only available for a restricted number of bacterial genomes. Here, we develop a novel general method that directly utilizes RNA-seq reads as a signal over nucleotide bases in the genome, extracting all the information from the RNA-seq data. This representation enabled us to employ deep learning techniques without limitations on species. The final model (OpDetect) demonstrates superior performance in terms of recall, f1-score and Area Under Receiver Operating Characteristic curve (AUROC) compared to previous approaches. Additionally, it showcases species-agnostic capabilities, successfully detecting operons even in Caenorhabditis elegans (C. elegans), the only eukaryotic organism known to have operons.
The Open Cluster NGC 2437 (Messier 46)
Creators: name: Davidge, T. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The stellar content of the open cluster NGC 2437 (Messier 46) is investigated using moderately deep u*,g', and r' MegaCam images. When compared with solar metallicity isochrones, the (g', u'-g') and (r', g'-r') CMDs are consistent with an age log(t_yr) = 8.35 +/- 0.15, a distance modulus 11.05 +/- 0.05, and a color excess E(B-V) = 0.115 +/- 0.035. The r' luminosity function (LF) of main sequence stars in the magnitude range r' < 17 (i.e. masses > 0.8 solar) has a shape that follows solar neighborhood star counts. However, at fainter magnitudes the cluster LF is flat, in contrast with what would be expected from solar neighborhood counts. The clustering properties of stars in NGC 2437 are investigated by examining the two-point angular correlation functions of main sequence stars in different brightness ranges. Main sequence stars fainter than r' = 17 are less centrally concentrated than brighter stars and are found over a larger area of the sky, suggesting that there is a corona of faint main sequence stars around NGC 2437. Based on the flat LF and extended spatial distribution of faint stars, it is concluded that NGC 2437 is actively shedding stars with masses < 0.8 solar.
description: To appear in the PASP
Exploring the Systematic Uncertainties of Type Ia Supernovae as Cosmological Probes
Creators: name: Wang, Shuang
name: Wang, Yun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We explore the systematic uncertainties of using Type Ia supernovae (SNe Ia) as cosmological probes, using the Supernova Legacy Survey Three Year data (SNLS3). We focus on studying the possible evolution of the stretch-luminosity parameter $α$ and the color-luminosity parameter $β$, by allowing $α$ and $β$ to be function of redshift, $z$. We find no evidence for the redshift evolution of $α$. We find that without flux-averaging SNe, $β$ is consistent with being a constant when only statistical uncertainties are included, but it increases significantly with $z$ when systematic uncertainties are also included. The evolution of $β$ becomes marginal when all the SNe are flux-averaged, and $β$ is consistent with being a constant when only SNe at $z\ge 0.04$ are flux-averaged. Our results are insensitive to the lightcurve fitter used to derive the SNLS3 sample, or the functional form of $α(z)$ and $β(z)$ assumed. It is likely that the apparent evolution of $β$ with $z$ for SNe without flux-averaging is a consequence of unknown systematic effects; flux-averaging reduces the impact of these effects by averaging them within each redshift bin. Assuming constant $α$ and $β$, we find that the flux-averaging of SNe has a significant impact on the distance-redshift relation.
description: 9 pages, 10 figures, accepted for publication in PRD
Orbital periods and Accretion disc structure of four AM CVn systems
Creators: name: Kupfer, T.
name: Groot, P. J.
name: Levitan, D.
name: Steeghs, D.
name: Marsh, T. R.
name: Rutten, R. G. M.
name: Nelemans, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Phase-resolved spectroscopy of four AM CVn systems obtained with the William Herschel Telescope and the Gran Telescopio de Canarias (GTC) is presented. SDSS\,J120841.96+355025.2 was found to have an orbital period of 52.96$\pm$0.40\,min and shows the presence of a second bright spot in the accretion disc. The average spectrum contains strong Mg\,{\sc i} and Si\,{\sc i/ii} absorption lines most likely originating in the atmosphere of the accreting white dwarf. SDSS\,J012940.05+384210.4 has an orbital period of 37.555$\pm$0.003 min. The average spectrum shows the Stark broadened absorption lines of the DB white dwarf accretor. The orbital period is close to the previously reported superhump period of 37.9\,min. Combined, this results in a period excess $ε$=0.0092$\pm$0.0054 and a mass ratio $q=0.031\pm$0.018. SDSS\,J164228.06+193410.0 displays an orbital period of 54.20$\pm$1.60\,min with an alias at 56.35\,min. The average spectrum also shows strong Mg\,{\sc i} absorption lines, similar to SDSS\,J120841.96+355025.2. SDSS\,J152509.57+360054.50 displays an period of 44.32$\pm$0.18\,min. The overall shape of the average spectrum is more indicative of shorter period systems in the 20-35 minute range. The accretor is still clearly visible in the pressure broadened absorption lines most likely indicating a hot donor star and/or a high mass accretor. Flux ratios for several helium lines were extracted from the Doppler tomograms for the disc and bright spot region, and compared with single-slab LTE models with variable electron densities and path lengths to estimate the disc and bright spot temperature. A good agreement between data and the model in three out of four systems was found for the disc region. All three systems show similar disc temperatures of $\sim$10\,500 K. In contrast, only weak agreement between observation and models was found for the bright spot region.
description: Accepted for publication in MNRAS, 14 pages, 14 figures, 3 tables
title: La Ricerca dipartimentale ai tempi del COVID-19
Creators: name: Santamaria, Chiara
name: De Luca, Daunia
name: Carrus, Giuseppe
name: Tiberio, Lorenza
name: Fiasco , Marta
name: Fagioli  , Sabrina
name: Mastandrea , Stefano
Publisher: name: RomaTrE-Press
Year: 2021

description: La pandemia Covid-19 ha comportato conseguenze e trasformazioni prefigurando scenari inediti sul piano economico, sociale e personale, determinando anche nel campo della ricerca l’urgenza di esplorarne le ricadute. Il volume dà quindi conto delle indagini svolte e in corso, sin dai primi giorni del lockdown, dai docenti e dai collaboratori del Dipartimento di Scienze della Formazione dell’Università Roma Tre, toccando i temi più diversi: dalla didattica a distanza, all’università e nei diversi ordini di scuola, al futuro dei servizi di orientamento, dal lavoro socio-educativo nelle varie tipologie di servizi all’impatto della pandemia sulle comunità, dalle narrazioni ai linguaggi artistici a contrasto di quest’emergenza non solo sanitaria. Si sono così esplorate le diverse educazioni possibili, riassegnando centralità ai processi formativi e al benessere delle persone, provando a tratteggiare nuovi paradigmi e prospettive.
description: La rapida diffusione della pandemia COVID-19 in Italia, nel periodo febbraio-maggio 2020 ha privato le famiglie della loro routine quotidiana sovvertendone il benessere psicologico e rendendo tutti psicologicamente più reattivi allo stress.  L’obiettivo della ricerca è stato esplorare l'impatto psicologico dell'esperienza di confinamento familiare restrittivo sul benessere di genitori, adolescenti e bambini. In collaborazione con il comitato UNICEF Italia è stato realizzato un sondaggio online ad hoc tramite un questionario volto a rilevare negli adulti la presenza di distress psicologico (DASS-21), l’impatto stressante del confinamento domiciliare (IES-R) e le strategie di coping utilizzate per fronteggiarlo (COPE-NVI) e, nei minori di età compresa tra 1 ½ e 17 anni, le risposte comportamentali ed emotive all’evento (CBCL). L'indagine è stata condotta in Italia tra il 21 aprile e il 3 maggio 2020. I risultati sottolineano la presenza di alti livelli di ansia, stress e depressione nelle madri e in generale nei genitori con bambini piccoli (1 e ½ -5 anni) rispetto ai genitori con bambini in età scolare e adolescenti. I genitori riferiscono la presenza di marcate reazioni emotivo-comportamentali che includono la presenza di ritiro sociale (probabilmente legato a manifestazioni di ansia e insicurezza), comportamento aggressivo e difficoltà di attenzione, rispettivamente, nei bambini e negli adolescenti. Questi risultati sono in linea con i dati internazionali e nazionali disponibili e rafforzano la necessità di interventi volti a prevenire e gestire le conseguenze del COVID-19 sul benessere psicologico di genitori, adolescenti e bambini.
Polarization observables in low-energy antiproton-proton scattering
Creators: name: Zhou, Daren
name: Timmermans, Rob G. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the polarization parameters in low-energy antiproton-proton elastic ($\bar{p}p\rightarrow\bar{p}p$) and charge-exchange ($\bar{p}p\rightarrow\bar{n}n$) scattering. The predictions for unmeasured observables are based on our new energy-dependent partial-wave analysis of all antiproton-proton scattering data below 925 MeV/$c$ antiproton laboratory momentum, which gives an optimal description of the existing database. Sizable and remarkable spin effects are observed, in particular for charge-exchange scattering. These result from the spin dependence of the long- and medium-range one- and two-pion exchange antinucleon-nucleon potential and the state dependence of the parametrized short-range interaction. We study the possibility of polarizing a circulating antiproton beam with a polarized proton target by exploiting the spin dependence of the $\bar{p}p$ total cross section. It appears feasible to achieve a significant transverse polarization of an antiproton beam within a reasonable time.
Network Detection Theory and Performance
Creators: name: Smith, Steven T.
name: Senne, Kenneth D.
name: Philips, Scott
name: Kao, Edward K.
name: Bernstein, Garrett
Publisher: name: arXiv
Year: 2013
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: Statistics Theory (math.ST)
subject: Physics and Society (physics.soc-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Network detection is an important capability in many areas of applied research in which data can be represented as a graph of entities and relationships. Oftentimes the object of interest is a relatively small subgraph in an enormous, potentially uninteresting background. This aspect characterizes network detection as a "big data" problem. Graph partitioning and network discovery have been major research areas over the last ten years, driven by interest in internet search, cyber security, social networks, and criminal or terrorist activities. The specific problem of network discovery is addressed as a special case of graph partitioning in which membership in a small subgraph of interest must be determined. Algebraic graph theory is used as the basis to analyze and compare different network detection methods. A new Bayesian network detection framework is introduced that partitions the graph based on prior information and direct observations. The new approach, called space-time threat propagation, is proved to maximize the probability of detection and is therefore optimum in the Neyman-Pearson sense. This optimality criterion is compared to spectral community detection approaches which divide the global graph into subsets or communities with optimal connectivity properties. We also explore a new generative stochastic model for covert networks and analyze using receiver operating characteristics the detection performance of both classes of optimal detection techniques.
description: Submitted to IEEE Trans. Signal Processing
Fluctuations and Symmetry Energy in Nuclear Fragmentation Dynamics
Creators: name: Colonna, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Within a dynamical description of nuclear fragmentation, based on the liquid-gas phase transition scenario, we explore the relation between neutron-proton density fluctuations and nuclear symmetry energy. We show that, along the fragmentation path, isovector fluctuations follow the evolution of the local density and approach an equilibrium value connected to the local symmetry energy. Higher density regions are characterized by smaller average asymmetry and narrower isotopic distributions. This dynamical analysis points out that fragment final state isospin fluctuations can probe the symmetry energy of the density domains from which fragments originate.
description: Accepted for publication in Physical Review Letters
Virtual and augmented reality. TAB-Fokus
Creators: name: Kind, Sonja
name: Ferdinand, Jan-Peter
name: Jetzke, Tobias
name: Richter, Stephan
name: Weide, Sebastian
Publisher: name: Büro für Technikfolgen-Abschätzung beim Deutschen Bundestag (TAB)
Year: 2019

description: VR and AR technologies have progressed to the point where an increased diffusion into different fields of application takes place. The use of VR requires specific hardware, whereas many AR applications can be used with smartphones or tablets. In addition to consumer markets, industrial fields of application are also increasingly being tapped. While German research makes a decisive contribution to VR and AR development, German industry has difficulty exploiting VR and AR. The use of VR implies legal and ethical issues that are still largely unresolved.
The MICA Experiment: Astrophysics in Virtual Worlds
Creators: name: Djorgovski, S. G.
name: Hut, Piet
name: Knop, Rob
name: Longo, Giuseppe
name: McMillan, Steve
name: Vesperini, Enrico
name: Donalek, Ciro
name: Graham, Matthew
name: Mahabal, Asish
name: Sauer, Franz
name: White, Charles
name: Lopes, Crista
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Physics Education (physics.ed-ph)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: We describe the work of the Meta-Institute for Computational Astrophysics (MICA), the first professional scientific organization based in virtual worlds. MICA was an experiment in the use of this technology for science and scholarship, lasting from the early 2008 to June 2012, mainly using the Second Life and OpenSimulator as platforms. We describe its goals and activities, and our future plans. We conducted scientific collaboration meetings, professional seminars, a workshop, classroom instruction, public lectures, informal discussions and gatherings, and experiments in immersive, interactive visualization of high-dimensional scientific data. Perhaps the most successful of these was our program of popular science lectures, illustrating yet again the great potential of immersive VR as an educational and outreach platform. While the members of our research groups and some collaborators found the use of immersive VR as a professional telepresence tool to be very effective, we did not convince a broader astrophysics community to adopt it at this time, despite some efforts; we discuss some possible reasons for this non-uptake. On the whole, we conclude that immersive VR has a great potential as a scientific and educational platform, as the technology matures and becomes more broadly available and accepted.
description: 10 pages, 8 figures; invited paper for the refereed proc. of the SLACTIONS 2012 conference
Oscillons and oscillating kinks in the Abelian-Higgs model
Creators: name: Achilleos, V.
name: Diakonos, F. K.
name: Frantzeskakis, D. J.
name: Katsimiga, G. C.
name: Maintas, X. N.
name: Manousakis, E.
name: Tsagkarakis, C. E.
name: Tsapalis, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Superconductivity (cond-mat.supr-con)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study the classical dynamics of the Abelian Higgs model employing an asymptotic multiscale expansion method, which uses the ratio of the Higgs to the gauge field amplitudes as a small parameter. We derive an effective nonlinear Schrodinger equation for the gauge field, and a linear equation for the scalar field containing the gauge field as a nonlinear source. This equation is used to predict the existence of oscillons and oscillating kinks for certain regimes of the ratio of the Higgs to the gauge field masses. Results of direct numerical simulations are found to be in very good agreement with the analytical findings, and show that the oscillons are robust, while kinks are unstable. It is also demonstrated that oscillons emerge spontaneously as a result of the onset of the modulational instability of plane wave solutions of the model. Connections of the results with the phenomenology of superconductors is discussed.
description: 8 pages, 10 figures
Azoarcus sp. strain KH32C affects rice plant growth and the root-associated soil bacterial community in low nitrogen input paddy fields
Creators: name: Sakoda, Midori
name: Mizusawa, Maika
name: Shiotsu, Fumitaka
name: Sakagami, Nobuo
name: Guo, Yong
name: Masutomi, Yuji
name: Fujii, Daichi
name: Isobe, Kazuo
name: Fujiwara, Toru
name: Senoo, Keishi
name: Nishizawa, Tomoyasu
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Plant Biology
subject: 60506 Virology

description: Excessive input of nitrogen fertilizer causes nitrogen pollution in aquatic environments. Utilizing microbial inoculants seems to be effective in decreasing the extent of nitrogen fertilizer application. Genome sequencing analysis of Azoarcus sp. strain KH32C, which was isolated from a paddy-upland rotation paddy field in Japan, showed that the strain may interact with plants. In this study, we examined the effect of inoculation of rice seeds with strain KH32C as a bacterial inoculant in paddy fields without nitrogen fertilization. Rice of three cultivars inoculated with strain KH32C were cultivated in paddy fields with different soil carbon and nitrogen levels. We investigated the growth rate of rice plants and the elemental composition of brown rice. In addition, the bacterial community structures in the rice root-associated soil were examined using molecular genetic analysis. KH32C inoculation resulted in an increase in the rice plant growth rate in the early growth phase with cultivar Nipponbare. Elemental composition analysis showed that the zinc concentration in brown rice of Nipponbare was increased by KH32C inoculation. KH32C inoculation affected the bacterial community in Nipponbare root-associated soil. The community of potential plant growth-promoting bacteria, the majority of which were in the class Alphaproteobacteria, had relatively high abundance in the early growth stage after KH32C inoculation. Our results indicated that strain KH32C can be utilized as a bacterial inoculant with the effect of promoting rice growth and enhancing the zinc content of rice grains in low nitrogen input paddy fields.
The case for high precision in elemental abundances of stars in the era of large spectroscopic surveys
Creators: name: Lindegren, Lennart
name: Feltzing, Sofia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A number of large spectroscopic surveys of stars in the Milky Way are under way or are being planned. In this context it is important to discuss the extent to which elemental abundances can be used as discriminators between different (known and unknown) stellar populations in the Milky Way. We aim to establish the requirements in terms of precision in elemental abundances, as derived from spectroscopic surveys of the Milky Way's stellar populations, in order to detect interesting substructures in elemental abundance space. We present a simple relation between the minimum number of stars needed to detect a given substructure and the precision of the measurements. The results are in agreement with recent small- and large-scale studies, with high and low precision, respectively. Large-number statistics cannot fully compensate for low precision in the abundance measurements and each survey should carefully evaluate what the main science drivers are for the survey and ensure that the chosen observational strategy will result in the precision necessary to answer the questions posed.
description: 6 pages, 6 figures. Accepted for publication in Astronomy & Astrophysics
Are the 'weak measurements' really measurements?
Creators: name: Sokolovski, D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Weak measurements can be seen as an attempt at answering the 'Which way?' question without destroying interference between the pathways involved. Unusual mean values obtained in such measurements represent the response of a quantum system to this 'forbidden' question, in which the 'true' composition of virtual pathways is hidden from the observer. Such values indicate a failure of a measurement where the uncertainty principle says it must fail, rather than provide an additional insight into physical reality.
Secular evolution and cylindrical rotation in boxy/peanut bulges: impact of initially rotating classical bulges
Creators: name: Saha, Kanak
name: Gerhard, Ortwin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Boxy/peanut bulges are believed to originate from galactic discs through secular processes. A little explored question is how this evolution would be modified if the initial disc was assembled around a preexisting classical bulge. Previously we showed that a low-mass initial classical bulge (ICB), as might have been present in Milky Way-like galaxies, can spin up significantly by gaining angular momentum from a bar formed through disc instability. Here we investigate how the disc instability and the kinematics of the final boxy/peanut (BP) bulge depend on the angular momentum of such a low-mass ICB. We show that a strong bar forms and transfers angular momentum to the ICB in all our models. However, rotation in the ICB limits the emission of the bar's angular momentum, which in turn changes the size and growth of the bar, and of the BP bulge formed from the disc. The final BP bulge in these models is a superposition of the BP bulge formed via the buckling instability and the spun-up ICB. We find that the long-term kinematics of the composite BP bulges in our simulations is independent of the rotation of the ICB, and is always described by cylindrical rotation. However, as a result of the co-evolution between bulge and bar, deviations from cylindrical rotation are seen during the early phases of secular evolution, and may correspond to similar deviations observed in some bulges. We provide a simple criterion to quantify deviations from pure cylindrical rotation, apply it to all our model bulges, and also illustrate its use for two galaxies: NGC7332 and NGC4570.
description: 9 pages, 11 figures; accepted for publication in MNRAS