cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Consequences of the Ejection and Disruption of Giant Planets
Creators: name: Guillochon, James
name: Ramirez-Ruiz, Enrico
name: Lin, Douglas N. C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The discovery of Jupiter-mass planets in close orbits about their parent stars has challenged models of planet formation. Recent observations have shown that a number of these planets have highly inclined, sometimes retrograde orbits about their parent stars, prompting much speculation as to their origin. It is known that migration alone cannot account for the observed population of these misaligned hot Jupiters, which suggests that dynamical processes after the gas disc dissipates play a substantial role in yielding the observed inclination and eccentricity distributions. One particularly promising candidate is planet-planet scattering, which is not very well understood in the non-linear regime of tides. Through three-dimensional hydrodynamical simulations of multi-orbit encounters, we show that planets that are scattered into an orbit about their parent stars with closest approach distance being less than approximately three times the tidal radius are either destroyed or completely ejected from the system. We find that as few as 5 and as many as 18 of the currently known hot Jupiters have a maximum initial apastron for scattering that lies well within the ice line, implying that these planets must have migrated either before or after the scattering event that brought them to their current positions. If stellar tides are unimportant $(Q_\ast \gtrsim 10^7)$, disk migration is required to explain the existence of the hot Jupiters present in these systems. Additionally, we find that the disruption and/or ejection of Jupiter-mass planets deposits a Sun's worth of angular momentum onto the host star. For systems in which planet-planet scattering is common, we predict that planetary hosts have up to a 35% chance of possessing an obliquity relative to the invariable plane of greater than 90 degrees.
description: 17 pages, 14 figures, submitted to ApJ. Movies and high-resolution snapshots available at http://astrocrash.net/projects/giant-planet-disruption
Report on measurements campaign within the ISAC-CNR (Bologna) site exploiting in-situ and the satellite-borne synergies
Creators: name: Castelli, Elisa
name: Pettinari, Paolo
name: Papandrea, Enzo
name: Cristofanelli, Paolo
name: Busetto, Maurizio
name: Valeri, Massimo
Publisher: name: Zenodo
Year: 2022
Subjects: QA4EO
MAX-DOAS
FRM4DOAS
TROPOMI

description: This document reports the activities performed in the frame of the WPs 2250-2.1, 2250-2.2 and 2251-2.3 of the “WPs 2250-2251: DOAS-BO: Towards a new FRM4DOAS - compliant site” project. The WPs 2250-2.1, 2250-2.2 and 2251-2.3 of the project are mainly centred on the measurement campaign performed in Bologna at the Istituto di Scienze dell’Atmosfera e del Clima - Consiglio Nazione delle Ricerche (ISAC-CNR) with the TROPOspheric Gas Analyzer Spectrometer (TROPOGAS) instrument and reporting the obtained results in the light of the exploitation of synergies with in-situ and satellite measurements.
Doctoral thesis recital (piano)
Creators: name: Malikov, Alexander
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Piano music
Sonatas (Piano)

description: Sonata no. 2 in G-Sharp minor, op. 19 : "Sonata-fantasy" / Alexander Scriabin -- Gaspard de lanuit -- Legend no. 2 : St. Francis of Paulo walking the waves ; Transcendental etude no. 8 in c minor : "Wild hunt" / Franz Liszt -- Sonata no. 32 in C minor, op. 111 / Ludwig van Beethoven -- Encore.
Ray model and ray-wave correspondence in coupled optical microdisks
Creators: name: Ryu, Jung-Wan
name: Hentschel, Martina
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We introduce a ray model for coupled optical microdisks, in which we select coupling-efficient rays among the splitting rays. We investigate the resulting phase-space structure and report island structures arising from the ray-coupling between the two microdisks. We find the microdisks's refractive index to influence the phase-space structure and calculate the stability and decay rates of the islands. Turning to ray-wave correspondence, we find many resonances to be directly related to the presence of these islands. We study the relation between the (ray-picture originating) island structures and the (wave-picture originating) spectral properties of resonances, especially the leakiness of the resonances which is represented as the imaginary part of the complex wave vector.
description: 9 pages, 8 figures
title: Internet of Things (IoT): Cybersecurity Risks in Healthcare
Creators: name: Patel, Ruhi
Publisher: name: Old Dominion University Libraries
Year: 2021

description: The rapid growth and investment in the Internet of Things (IoT) has significantly impacted how individuals and industries operate. The Internet of Things (IoT) refers to a network of physical, technology-embedded objects that communicate, detect, and interact with their external environment or internal state (Hung, 2017). According to Tankovska (2020), IoT devices are estimated to reach 21.5 billion units by 2025. This technological boom is leading various industrial sectors to notice a quick increase in cybersecurity risks and threats. One industrial sector has been particularly vulnerable to numerous cyber threats across the globe: healthcare. Oliver Noble (2020), a data encryption specialist at NordLocker, suggests that cybercriminals target healthcare institutions because they store an overwhelming amount of patient information that is private, personal, and unchangeable. Healthcare organizations have a difficult time securing their cybersecurity infrastructure and the reasons for this will be further discussed in this paper.
Mechanisms and dynamics of mineral-fluid reactions from Near Surface to Upper Earth Crust
Creators: name: DUAN, GAN
Publisher: name: Monash University
Year: 2021
Subjects: subject: Geochemistry
subject: FOS: Earth and related environmental sciences

description: This thesis aims to advance our understanding of the varying factors that control important mineral-fluid reactions in the Earth’s crust; specifically, this thesis provides in-depth mechanistic insights into the factors controlling dolomitization and potassic/sodic alteration. On one hand, we used the Ca-Mg-carbonate system as a model to address the effects of fluid to rock ratio and pore pressure on the fate of fluid-driven reactions. On the other hand, we used model reactions among alkali-feldspars, the most abundant mineral in the Earth’s crust, to show that minor amounts of fluorine can improve the kinetics of widespread sodic and potassic alteration.
Doctoral thesis recital (violin)
Creators: name: Riley, Sean
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Violin and piano music
Sonatas (Violin and piano)

description: Three romances for violin and piano. Andante molto / Clara Schumann -- Andante ; Sonata no. 1 for violin and piano, Sz. 75 / Béla Bartok. With: Farshad Zadeh, piano.
Stellar metallicities beyond the Local Group: the potential of J-band spectroscopy with extremely large telescopes
Creators: name: Evans, C. J.
name: Davies, B.
name: Kudritzki, R. -P.
name: Puech, M.
name: Yang, Y.
name: Cuby, J. -G.
name: Figer, D. F.
name: Lehnert, M. D
name: Morris, S. L.
name: Rousset, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present simulated J-band spectroscopy of red giants and supergiants with a 42m European Extremely Large Telescope (E-ELT), using tools developed toward the EAGLE Phase A instrument study. The simulated spectra are used to demonstrate the validity of the 1.15-1.22 micron region to recover accurate stellar metallicities from Solar and metal-poor (one tenth Solar) spectral templates. From tests at spectral resolving powers of four and ten thousand, we require continuum signal-to-noise ratios in excess of 50 (per two-pixel resolution element) to recover the input metallicity to within 0.1 dex. We highlight the potential of direct estimates of stellar metallicites (over the range -1
description: Accepted by A&A, 13 pages
N2H+ depletion in the massive protostellar cluster AFGL 5142
Creators: name: Busquet, Gemma
name: Estalella, Robert
name: Zhang, Qizhou
name: Viti, Serena
name: Palau, Aina
name: Ho, Paul T. P.
name: Sanchez-Monge, Alvaro
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We aim at investigating with high angular resolution the NH3/N2H+ ratio toward the high-mass star-forming region AFGL 5142 in order to study whether this ratio behaves similarly to the low-mass case, for which the ratio decreases from starless cores to cores associated with YSOs. CARMA was used to observe the 3.2 mm continuum and N2H+(1-0) emission. We used NH3(1,1) and (2,2), HCO+(1-0) and H13CO+(1-0) data from the literature and we performed a time-dependent chemical modeling of the region. The 3.2 mm continuum emission reveals a dust condensation of ~23 Msun associated with the massive YSOs, deeply embedded in the strongest NH3 core (hereafter central core). The N2H+ emission reveals two main cores, the western and eastern core, located to the west and to the east of the mm condensation, and surrounded by a more extended and complex structure of ~0.5 pc. Toward the central core the N2H+ emission drops significantly, indicating a clear chemical differentiation in the region. We found low values of the NH3/N2H+ ratio ~50-100 toward the western/eastern cores, and high values up to 1000 in the central core. The chemical model indicates that density, and in particular temperature, are key parameters in determining the NH3/N2H+ ratio. The high density and temperature reached in the central core allow molecules like CO to evaporate from grain mantles. The CO desorption causes a significant destruction of N2H+, favoring the formation of HCO+. This result is supported by our observations, which show that N2H+ and HCO+ are anticorrelated in the central core. The observed values of the NH3/N2H+ ratio in the central core can be reproduced by our model for times t~4.5-5.3x10^5 yr (central) and t~10^4-3x10^6 yr (western/eastern). The NH3/N2H+ ratio in AFGL 5142 does not follow the same trend as in regions of low-mass star formation mainly due to the high temperature reached in hot cores.
description: Accepted for publication in A&A. 14 pages, 9 Figures, 5 Tables
Mapping systematic errors in helium abundance determinations using Markov Chain Monte Carlo
Creators: name: Aver, Erik
name: Olive, Keith A.
name: Skillman, Evan D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Monte Carlo techniques have been used to evaluate the statistical and systematic uncertainties in the helium abundances derived from extragalactic H~II regions. The helium abundance is sensitive to several physical parameters associated with the H~II region. In this work, we introduce Markov Chain Monte Carlo (MCMC) methods to efficiently explore the parameter space and determine the helium abundance, the physical parameters, and the uncertainties derived from observations of metal poor nebulae. Experiments with synthetic data show that the MCMC method is superior to previous implementations (based on flux perturbation) in that it is not affected by biases due to non-physical parameter space. The MCMC analysis allows a detailed exploration of degeneracies, and, in particular, a false minimum that occurs at large values of optical depth in the He~I emission lines. We demonstrate that introducing the electron temperature derived from the [O~III] emission lines as a prior, in a very conservative manner, produces negligible bias and effectively eliminates the false minima occurring at large optical depth. We perform a frequentist analysis on data from several "high quality" systems. Likelihood plots illustrate degeneracies, asymmetries, and limits of the determination. In agreement with previous work, we find relatively large systematic errors, limiting the precision of the primordial helium abundance for currently available spectra.
description: 25 pages, 11 figures
Doctoral thesis recital (flute (chamber))
Creators: name: Tanner, Chelsea
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Tangos
Flute and guitar music
Trios (Flute, harp, viola)
Flute and cello music
Flute and clarinet music
Sonatas

description: Sonatine modale : pour flute et clarinette, op. 155 / Charles Koechlin -- Histoire du tango / Astor Piazzolla -- Sonata for flute, viola and harp, L. 137 / Claude Debussy -- Assobio a jato = The jet whistle / Heitor Villa-Lobos.
Improving relativistic MOND with Galileon k-mouflage
Creators: name: Babichev, Eugeny
name: Deffayet, Cedric
name: Esposito-Farese, Gilles
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a simple field theory reproducing the MOND phenomenology at galaxy scale, while predicting negligible deviations from general relativity at small scales thanks to an extended Vainshtein ("k-mouflage") mechanism induced by a covariant Galileon-type Lagrangian. The model passes solar-system tests at the post-Newtonian order, including those of local Lorentz invariance, and its anomalous forces in binary-pulsar systems are orders of magnitude smaller than the tightest experimental constraints. The large-distance behavior is obtained as in Bekenstein's tensor-vector-scalar (TeVeS) model, but with several simplifications. In particular, no fine-tuned function is needed to interpolate between the MOND and Newtonian regimes, and no dynamics needs to be defined for the vector field because preferred-frame effects are negligible at small distances. The field equations depend on second (and lower) derivatives, and avoid thus the generic instabilities related to higher derivatives. Their perturbative solution around a Schwarzschild background is remarkably simple to derive. We also underline why the proposed model is particularly efficient within the class of covariant Galileons.
description: 6 pages, 1 figure, RevTeX4 format
VLA observations of water masers towards 6.7 GHz methanol maser sources
Creators: name: Bartkiewicz, A.
name: Szymczak, M.
name: Pihlström, Y. M.
name: van Langevelde, H. J.
name: Brunthaler, A.
name: Reid, M. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: 22 GHz water and 6.7 GHz methanol masers are usually thought as signposts of early stages of high-mass star formation but little is known about their associations and the physical environments they occur in. The aim was to obtain accurate positions and morphologies of the water maser emission and relate them to the methanol maser emission recently mapped with Very Long Baseline Interferometry. A sample of 31 methanol maser sources was searched for 22 GHz water masers using the VLA and observed in the 6.7 GHz methanol maser line with the 32 m Torun dish simultaneously. Water maser clusters were detected towards 27 sites finding 15 new sources. The detection rate of water maser emission associated with methanol sources was as high as 71%. In a large number of objects (18/21) the structure of water maser is well aligned with that of the extended emission at 4.5 $μ$m confirming the origin of water emission from outflows. The sources with methanol emission with ring-like morphologies, which likely trace a circumstellar disk/torus, either do not show associated water masers or the distribution of water maser spots is orthogonal to the major axis of the ring. The two maser species are generally powered by the same high-mass young stellar object but probe different parts of its environment. The morphology of water and methanol maser emission in a minority of sources is consistent with a scenario that 6.7 GHz methanol masers trace a disc/torus around a protostar while the associated 22 GHz water masers arise in outflows. The majority of sources in which methanol maser emission is associated with the water maser appears to trace outflows. The two types of associations might be related to different evolutionary phases.
description: accepted by Astronomy & Astrophysics
Recent applications of Stille reaction in total synthesis of natural products: An update
Creators: name: Mommahed Heravi, Majid
name: Mohammadkhani, Leyla
Publisher: name: figshare
Year: 2022
Subjects: subject: 30302 Nanochemistry and Supramolecular Chemistry
subject: FOS: Chemical sciences
subject: 30502 Natural Products Chemistry
subject: 30205 Non-metal Chemistry
subject: Nuclear Chemistry
subject: 30503 Organic Chemical Synthesis
subject: 30303 Optical Properties of Materials
subject: 30504 Organic Green Chemistry
subject: Organic Chemistry
subject: 30599 Organic Chemistry not elsewhere classified
subject: 39904 Organometallic Chemistry

description: Stille reaction is one of the most common, efficient and selective Pd-catalyzed cross-coupling reactions for the construction of C-C bonds in the art of organic synthesis. It was initially achieved and reported in 1978 b y J. K. Stille and D. Milstein. This reaction is based on organotin compounds in the presence of catalytic amount of Pd complexes which can be performed in mild reaction conditions. Nowadays, this strategy is considered as a powerful tool in the total synthesis of a wide variety of natural products and non-natural biologically active compounds as well as synthetic key intermediates in the curtail C-C bonds construction steps. In 2013 we reported the applications of Stille reaction in the total synthesis of natural products, published in Tetrahedron. Due to huge numbers of references regarding the applications of this name reaction in the total synthesis of naturally occurring compounds, we thought it is worthwhile to update our aforementioned reports, highlighting the applications of Stille coupling reaction in the total synthesis of biologically active natural products, including macrolides, alkaloids, cyclic ethers, terpenes and lactones accomplished between 2013 till date.
title: Fundamentals of Human-Centric Artificial Intelligence (A.I.): Comparative Analysis of Europe and the U. S. Landscape
Creators: name: Williams, Torré A.
Publisher: name: Old Dominion University Libraries
Year: 2020

description: This research is a comparative analysis of human-centric Artificial Intelligence (A.I.) in Europe and the U.S. This research establishes fundamentals that are critical to what makes A.I. human-centric. This research contains eight phases: 1) Lawful A.I.; 2) Robust A.I.; 3) Ethical A.I.; 4) Human-centric A.I.; 5) Current State of A.I.; 6) A.I. in Europe; 7) A.I. in the U.S.; 9) Importance of Human-centric A.I. This research shows that there are still ongoing changes with having a human-centric A.I. and why it is very important to society. This research is the beginning of the making of a successful and reliable human-centric A.I.
Exploring Born-Infeld electrodynamics using plasmas
Creators: name: Burton, D. A.
name: Trines, R. M. G. M.
name: Walton, T. J.
name: Wen, H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The behaviour of large amplitude electrostatic waves in cold plasma is investigated in the context of Born-Infeld electrodynamics. The equations of motion for the plasma are established using an unconstrained action principle. The maximum amplitude and frequency of a large amplitude electrostatic wave are determined, and a lower bound on the wavelength is established. The maximum electric field is found to be the same as that on a point electron at rest.
description: 10 pages, 1 figure
Experiments and simulations on negative/positive bias temperature instability in 28nm CMOS devices
Creators: name: Bayat, Shahin
Publisher: name: University of British Columbia
Year: 2015

description: CMOS transistors come with a scaling potential, which brings along challenges such as process variation and NBTI/PBTI (Negative/Positive Bias Temperature Instability). My objectives during this project are to investigate effects of aging on CMOS devices as well as to show experimental results in order to model the effect of N/PBTI specifically targeting the 28nm technology node. The direct effect of transistor aging is a degradation of device threshold voltage, which can lead to performance degradation or malfunctions. Places such as server farms, data centers, and outer space-crafts, where device reliability for a long period is significant and accessibility is an issue, can benefit from an aging reversal process. In addition, as transistor channel lengths become smaller, they are more prone to a reduced lifetime. The exact causes of aging are not entirely known until this day and as a result, no real mechanism to reverse the process has been fully implemented on FPGAs or ASICs. I believe the true solution to these scalability challenges lay within the device structure and materials used in CMOS transistors, however, accelerated recovery at high temperatures can also help in reversing the effect of aging by a noticeable amount. I have been able to use this technique to reverse the effect of threshold voltage degradation in FPGAs. In this thesis, I present experimental results on the effect of degradation and recovery on a commercial FPGA. I then use the experimental results to calculate degradation parameters of transistor aging in this technology node and propose experimental setups for a 28nm ASIC.
$Λ(t)$CDM Model as a Unified Origin of Holographic and Agegraphic Dark Energy Models
Creators: name: Chen, Yun
name: Zhu, Zong-Hong
name: Xu, Lixin
name: Alcaniz, J. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Motivated by the fact that any nonzero $Λ$ can introduce a length scale or a time scale into Einstein's theory, $r_Λ=ct_Λ=\sqrt{3/|Λ|}$. Conversely, any cosmological length scale or time scale can introduce a $Λ(t)$, $Λ(t)=3/r^2_Λ(t)=3/(c^2t^2_Λ(t))$. In this letter, we investigate the time varying $Λ(t)$ corresponding to the length scales, including the Hubble horizon, the particle horizon and the future event horizon, and the time scales, including the age of the universe and the conformal time. It is found out that, in this scenario, the $Λ(t)$CDM model can be taken as the unified origin of the holographic and agegraphic dark energy models with interaction between the matter and the dark energy, where the interacting term is determined by $Q=-\dotρ_Λ$. We place observational constraints on the $Λ(t)$CDM models originating from different cosmological length scales and time scales with the recently compiled "Union2 compilation" which consists of 557 Type Ia supernovae (SNIa) covering a redshift range $0.015\leq z \leq 1.4$. In conclusion, an accelerating expansion universe can be derived in the cases taking the Hubble horizon, the future event horizon, the age of the universe and the conformal time as the length scale or the time scale.
description: 13 pages, 6 figures. Accepted for publication in PLB
Simulation of the fast ion instability in SSRF storage ring
Creators: name: Xia, Guoxing
name: Jiang, Bocheng
name: Liu, Guimin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Fast ion instability has been observed in the early commissioning and operation of the Shanghai Synchrotron Radiation Facility (SSRF) storage ring. In this paper, a weak-strong code is used to simulate the fast ion instability in SSRF storage ring. Various fill patterns and gas pressures are investigated. The results show that the mini-train fill patterns are very effective to suppress the growth of the fast ion instability.
description: This paper is submitted to the proceedings of the first International Particle Accelerator Conference (IPAC10) in Kyoto, Japan
Age-dependent differences in the transcriptional profile of antigen presenting cells in response to immune stimulation and infection converges on interferon response factors
Creators: name: Wee, Kathleen
Publisher: name: University of British Columbia
Year: 2015

description: Newborns and older adults aged 65 and over have a heightened risk for severe infections, suggesting suboptimal immune responses. These two populations thus represent age-defined windows of vulnerability to infection. Antigen presenting cells (APC) are important in bridging the innate and adaptive immune systems as they express pathogen recognition receptors such as Toll-like receptors (TLR) that detect the presence of pathogens. They have been proposed to be partially responsible for the altered immunity observed at the extreme ends of the age-spectrum. However, the molecular mechanism/s that underlie this APC deficit have not been fully delineated. We chose to apply newly available cutting-edge tools to begin identifying such mechanisms. With the availability of systems biological tools to interrogate APC function, our overarching hypothesis is that age-dependent differences in the transcriptional response of APC results in functional differences in response to immune stimulation and infection. To address this hypothesis, we employed global transcriptional profiling to comprehensively investigate age-dependent differences in mRNA expression in the most important APC subsets from newborns, healthy young adults, and older adults following TLR stimulation or infection. Following TLR7/8 stimulation, neonatal DC displayed altered expression of signaling pathways involved in the response to viral pathogens. Specifically, IRF-dependent MAPK pathway genes were expressed in an age-dependent manner at baseline, while age-dependent differences in the expression of other IRF-dependent responses only occurred following stimulation. We also investigated the transcriptomic responses of monocytes to Listeria monocytogenes (Lm). Monocytes are one of the primary targets of Lm. Monocytes from newborns, young adults, and older adults differentially expressed guanylate binding proteins (GBP) in an age-dependent manner upon infection, along with significantly reduced IFN-β production in susceptible age groups, while signaling downstream of the IFN receptor complex was comparable. This suggests that age-related differences in IFN-β production in response to Lm infection led to reduced induction of GBPs in newborns and older adults compared to young adults. IFN-β production is also known to be IRF dependent. This convergence of age-dependent differences in immunity on IRF-regulated pathways begins to outline a possible molecular epicenter associated with suboptimal immune responses early and late in life.
MAKTABLARDA TASVIRIY SAN'AT TO'GARAK MASHG'ULOTLARIDA O'QUVCHILARNI ZAMONAVIY INNOVATSION BILIMLARGA O'RGATISH
Creators: name: Djabbarova, Nargiza
Publisher: name: Zenodo
Year: 2025

description: Mazkur maqola maktablarda tasviriy san’at to‘garak mashg‘ulotlarida o‘quvchilarni zamonaviy innovatsion bilimlar bilan tanishtirishning ahamiyatiga bag‘ishlangan. O‘quvchilarning ijodiy fikrlashini rivojlantirish, san’atga bo‘lgan qiziqishlarini oshirish va zamonaviy texnologiyalarni o‘rgatish orqali ularga yangi bilimlar berish maqsad qilingan. Maqolada innovatsion o‘quv metodlari, raqamli tasviriy san’at dasturlari, 3D modellashtirish va grafik dizayn kabi zamonaviy vositalardan foydalanish hamda interfaol o‘qitish yondashuvlari muhokama qilinadi. O‘quvchilarni san’at sohasidagi eng yangi tendensiyalar va texnologiyalar bilan tanishtirish, ularni nafaqat an’anaviy, balki raqamli san’at va dizayn sohasida ham ko‘nikmalarni rivojlantirishga undaydi. Maqola, o‘qituvchilar va pedagoglar uchun tasviriy san’at to‘garaklarini samarali tashkil qilishda yordam beruvchi amaliy tavsiyalarni taqdim etadi.
Sub-Volt Silicon-Organic Electrooptic Modulator
Creators: name: Ding, Ran
name: Baehr-Jones, Tom
name: Kim, Woo-Joong
name: Spott, Alexander
name: Fedeli, Jean-Marc
name: Huang, Su
name: Luo, Jingdong
name: Jen, Alex K. -Y.
name: Dalton, Larry
name: Hochberg, Michael
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Lowering the operating voltage of electrooptic modulators is desirable for a variety of applications, most notably in analog photonics , and digital data communications . In particular for digital systems such as CPUs, it is desirable to develop modulators that are both temperature-insensitive and compatible with typically sub-2V CMOS electronics ; however, drive voltages in silicon-based MZIs currently exceed 6.5V . Here we show an MZI modulator based on an electrooptic polymer-clad silicon slot waveguide, with a halfwave voltage of only 0.69V, and a bandwidth of 500 MHz. We also show that there are also paths to significantly improve both the bandwidth and drive voltage . Our silicon-organic modulator has an intrinsic power consumption less than 0.66 pJ/bit, nearly an order of magnitude improvement over the previous lowest energy silicon MZI .
description: Under consideration at Nature Photonics
The Dawn of the Red: Star formation histories of group galaxies over the past 5 billion years
Creators: name: McGee, Sean L.
name: Balogh, Michael L.
name: Wilman, David J.
name: Bower, Richard G.
name: Mulchaey, John S.
name: Parker, Laura C.
name: Oemler, Augustus
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We examine the star formation properties of group and field galaxies in two surveys, the Sloan Digital Sky Survey (SDSS; at z ~ 0.08) and the Group Environment and Evolution Collaboration (GEEC; at z ~ 0.4). Using UV imaging from the GALEX space telescope, along with optical and, for GEEC, near infrared photometry, we compare the observed spectral energy distributions to large suites of stellar population synthesis models. This allows us to accurately determine star formation rates and stellar masses. We find that star forming galaxies of all environments undergo a systematic lowering of their star formation rate between z=0.4 and z=0.08 regardless of mass. Nonetheless, the fraction of passive galaxies is higher in groups than the field at both redshifts. Moreover, the difference between the group and field grows with time and is mass-dependent, in the sense the the difference is larger at low masses. However, the star formation properties of star forming galaxies, as measured by their average specific star formation rates, are consistent within the errors in the group and field environment at fixed redshift. The evolution of passive fraction in groups between z=0.4 and z=0 is consistent with a simple accretion model, in which galaxies are environmentally affected 3 Gyrs after falling into a ~ 10E13 Msun group. This long timescale appears to be inconsistent with the need to transform galaxies quickly enough to ensure that star forming galaxies appear similar in both the group and field, as observed.
description: 19 pages, MNRAS, in press
The Association Between Indoor Nitrogen Dioxide or Gas Cooking and Asthma or Wheeze in Children: A Systematic Review Protocol
Creators: name: Li, Wenchao
name: Goodman, Julie
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Epidemiology
subject: Medicine and Health Sciences
subject: Public Health
subject: Epidemiology
subject: Gas Cooking
subject: Indoor Nitrogen Dioxide
subject: Systematic Review
subject: Wheeze
subject: Asthma
subject: Children

description: This registration has been updated. Please see the updated systematic review protocol registration at https://doi.org/10.17605/OSF.IO/KMTQA. An increasing number of epidemiology studies have been conducted to examine the relationship between indoor nitrogen dioxide exposure and childhood asthma or wheeze. However, the previous systematic review on this topic, which was conducted about a decade ago, did not sufficiently evaluate heterogeneity among individual studies or study quality. We propose to conduct a new systematic review on the association between indoor nitrogen dioxide or gas cooking and asthma or wheeze in children that entails an in-depth evaluation of study heterogeneity and study quality and covers the recently published literature.
FREQUENCIESOFEXAMINATIONMALPRACTICEBYTYPEGENDERANDFACULTYINUNIVERSITYOFCALABAR.pdf
Creators: name: Anam, Ekpenyonganwan Godwin
Publisher: name: figshare
Year: 2022
Subjects: subject: 160506 Education Policy
subject: FOS: Political science

description: Examination malpractice is erroneously seen as a normal practice by some less disciplined students who variously tag it as “brain support”. “heaven helps those who help themselves”, and so on, to support their view about it. Nigerian education system has been suffering from this menace for a long time. Many university students do not see any reason why they should study hard and also prepare for examination. Some of the students do not have interest in attending classes and also doing assignments given to them by their lecturers but believe that they will always pass the examinations at the end of the semester. Examination malpractice has been variously defined as any dishonest or unauthorised action or deed committed by a student or anyone or group related to the student in any way in order to obtain undeserved mark or grade (Onuka & Amusan cited in Onuka & Durowoju, 2013), process of cheating in the examination (Usman, 2005), deliberate wrong doing contrary to official examination rules (Wilayat, 2009). Its origin is traced back to 1914, when the Senior Cambridge Examination question papers were seen by candidates before the examination date and since then till now, leakages of examination question papers and other forms of malpractice keep on occurring (Adesina, 2000). Since then, different types of examination malpractice have emerged. Attempts to curb them leads the desperate students into devising other methods. Stringent penalties such as threats of huge financial fines or jail terms have not deterred these students. Emaikwu (2012) noted that cheating has become a national phenomenon to the extent that forging of certificates to gain admission or employment is a usual habit among desperate Nigerians even among the political class. He went further by saying that several members of the legislative and executive arms of government in the last few years have been accused of certificate forgery in Nigeria and some have fallen from grace to grass as a result of different types of examination malpractice...
Note on PI and Szeged indices
Creators: name: c, Aleksandar Ili\'
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C12, 92E10

description: In theoretical chemistry molecular structure descriptors are used for modeling physico-chemical, pharmacological, toxicologic, biological and other properties of chemical compounds. In this paper we study distance-based graph invariants and present some improved and corrected sharp inequalities for PI, vertex PI, Szeged and edge Szeged topological indices, involving the number of vertices and edges, the diameter, the number of triangles and the Zagreb indices. In addition, we give a complete characterization of the extremal graphs.
description: 10 pages, 3 figures
Additional file 6 of Promoting physical activity in a multi-ethnic population at high risk of diabetes: the 48-month PROPELS randomised controlled trial
Creators: name: Khunti, Kamlesh
name: Griffin, Simon
name: Brennan, Alan
name: Dallosso, Helen
name: Davies, Melanie J.
name: Eborall, Helen C.
name: Edwardson, Charlotte L.
name: Gray, Laura J.
name: Hardeman, Wendy
name: Heathcote, Laura
name: Henson, Joe
name: Pollard, Daniel
name: Sharp, Stephen J.
name: Sutton, Stephen
name: Troughton, Jacqui
name: Yates, Tom
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Science Policy
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Computational Biology

description: Additional file 6:. Baseline value with 12- and 48-month intervention effect for secondary outcomes.
title: The Bank of Canada COVID‑19 stringency index: measuring policy response across provinces
Creators: name: Cheung, Calista
name: Lyons, Jerome
name: Madsen, Bethany
name: Miller, Sarah
name: Sheikh, Saarah Sheikh
Publisher: name: Bank of Canada
Year: 2021

description: Provincial governments in Canada have taken different approaches to containing the spread of COVID-19. This paper presents details on a stringency index constructed by staff at the Bank of Canada. The index follows methodology developed by the Blavatnik School of Government at the University of Oxford, which we adapt to the Canadian context to capture granular differences in policy responses across provinces. The index measures the stringency of policies related to containment restrictions and public information campaigns across provinces and over time. It does not measure the efficacy of a province’s COVID-19 response or provide a direct measure of the economic impact of government policies. But it can be used to disentangle the effects of containment measures from other factors, such as varying transmission rates of the COVID-19 virus, voluntary business closures, physical distancing, and government support programs.
Aggregation and dispersion phenomena in the quartz-hematite system in the presence of polymers
Creators: name: Engwayu, Jophat
Publisher: name: University of British Columbia
Year: 2015

description: Aggregation and dispersion phenomena in the quartz-hematite system in the presence of polymers were analyzed through the measurement of adsorption density of polymers, turbidity of mineral suspensions, and zeta potential distributions. All the tests were performed on single minerals as well as on their 1:1 mixtures (by volume). A procedure was developed to determine the composition of the tested supernatants using scanning electron microscopy in order to enhance interpretation of zeta potential distributions obtained for mineral mixtures. Two carboxymethyl celluloses and a sodium lignosulfonate were chosen as polymeric additives. It was found that carboxymethyl celluloses selectively adsorbed on hematite in mixtures with quartz and that the selectivity of adsorption was a result of a high affinity of the polysaccharides towards the hematite surface. Lignosulfonate exhibited low affinity type of adsorption on both minerals although preferential adsorption on hematite at pH 5.5 was also observed. At pH 5.5, carboxymethyl celluloses acted as flocculants towards hematite, while lignosulfonate functioned as a coagulant. The polymers strongly dispersed hematite at high pH. The polymers also showed dispersing capabilities towards quartz regardless of pH. Selective flocculation of residual hematite from mixtures with quartz was observed at low pH despite extensive heterocoagulation between the minerals. Lignosulfonate behaved as a selective dispersant of hematite at high pH despite similar adsorption densities of the polymer on the tested minerals. It was generally determined that conditions (pH, polymer concentration) leading to strong dispersion were associated with very narrow zeta potential distributions (10-20 mV), indicative of uniform surface charging characteristics of the tested particle population. In contrast, polymer-induced aggregation of mineral particles (flocculation or coagulation) was accompanied by broad zeta potential distributions (up to 70 mV) resulting from non-uniform adsorption of the polymers on mineral particles and surface charge heterogeneities. Such broad zeta potential distributions were also characteristic of heterocoagulated mixtures in the absence of polymers. Several recommendations were made regarding measurements of zeta potential distributions in mineral mixtures. In order to characterize the entire population of a mineral mixture, such measurements should be performed on very dilute samples of constant turbidity to limit the differential settling of aggregated components.
Regularity results for the spherically symmetric Einstein-Vlasov system
Creators: name: Andreasson, Hakan
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The spherically symmetric Einstein-Vlasov system is considered in Schwarzschild coordinates and in maximal-isotropic coordinates. An open problem is the issue of global existence for initial data without size restrictions. The main purpose of the present work is to propose a method of approach for general initial data, which improves the regularity of the terms that need to be estimated compared to previous methods. We prove that global existence holds outside the centre in both these coordinate systems. In the Schwarzschild case we improve the bound on the momentum support obtained in \cite{RRS} for compact initial data. The improvement implies that we can admit non-compact data with both ingoing and outgoing matter. This extends one of the results in \cite{AR1}. In particular our method avoids the difficult task of treating the pointwise matter terms. Furthermore, we show that singularities never form in Schwarzschild time for ingoing matter as long as $3m\leq r.$ This removes an additional assumption made in \cite{A1}. Our result in maximal-isotropic coordinates is analogous to the result in \cite{R1}, but our method is different and it improves the regularity of the terms that need to be estimated for proving global existence in general.
description: 25 pages. To appear in Ann. Henri Poincar\'e
The Role of Renal Compartment Syndrome in Renal Injury During Preeclampsia
Creators: name: Anderson, Jennifer L
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Obstetrics and gynaecology
Radiology and organ imaging
Nephrology and urology
Medical physiology not elsewhere classified

description: Preeclampsia and other hypertensive disorders of pregnancy impact 2-8% of pregnancies with often devastating results. Current treatment methods resort to birth, which forces the fetus into the world before they are fully developed but can save the mother’s life. Preeclampsia is broadly considered to be of placental origin and current etiologic understanding focuses on systemic endothelial dysfunction triggered by an imbalance of vasoregulatory factors released by this maternal/fetal organ. This imbalance explains many early-term cases but fails to adequately address later cases where this imbalance is not always seen. Conversely, ischemia-reperfusion of the kidney is known to correlate with endothelial dysfunction, and preeclamptic women are known to have a stenosis in their left renal vein (LRV) in the supine position (on their back). Herein, we suggest that extrinsic compression of the LRV by the gravid uterus, without collaterals, produces a renal injury which can induce systemic endothelial cell dysfunction. We theorize this compression is position dependent and produces renal ischemia through an unchecked cycle of increased intrarenal pressure, subsequent afferent arteriole constriction and decreased glomerular perfusion, and activation of the renin-angiotensin-aldosterone system. We aim to elucidate this through murine studies of a surgically induced LRV stenosis and a retrospective clinical study where the maternal renal veins are measured from magnetic resonance images. Findings from this work suggest partial renal venous outflow obstruction leads to renal injury but could be moderated through alternative maternal resting positions. This potential alternative pathologic mechanism has significant clinical implications for future therapies targeting this condition.
Lifting the Dusty Veil With Near- and Mid-Infrared Photometry: I. Description and Applications of the Rayleigh-Jeans Color Excess Method
Creators: name: Majewski, Steven R.
name: Zasowski, Gail
name: Nidever, David L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Milky Way (MW) remains a primary laboratory for understanding the structure and evolution of spiral galaxies, but typically we are denied clear views of MW stellar populations at low Galactic latitudes because of extinction by interstellar dust. However, the combination of 2MASS near-infrared (NIR) and Spitzer-IRAC mid-infrared (MIR) photometry enables a powerful method for determining the line of sight reddening to any star: the sampled wavelengths lie in the Rayleigh-Jeans part of the spectral energy distribution of most stars, where, to first order, all stars have essentially the same intrinsic color. Thus, changes in stellar NIR-MIR colors due to interstellar reddening are readily apparent, and (under an assumed extinction law) the observed colors and magnitudes of stars can be easily and accurately restored to their intrinsic values, greatly increasing their usefulness for Galactic structure studies. In this paper we explore this "Rayleigh-Jeans Color Excess" (RJCE) method and demonstrate that use of even a simple variant of the RJCE method based on a single reference color, (H-[4.5um]), can rather accurately remove dust effects from previously uninterpretable 2MASS color-magnitude diagrams of stars in fields along the heavily reddened Galactic mid-plane, with results far superior to those derived from application of other dereddening methods. We also show that "total" Galactic midplane extinction looks rather different from that predicted using 100um emission maps from the IRAS/ISSA and COBE/DIRBE instruments as presented by Schlegel et al. Instead, the Galactic mid-plane extinction strongly resembles the distribution of 13-CO (J=1->0) emission. Future papers will focus on refining the RJCE method and applying the technique to understand better not only dust and its distribution, but the distribution of stars intermixed with the dust in the low-latitude Galaxy.
description: Accepted to ApJ; 21 pages, 17 figures
Additional file 1: of Molecular characterization and phylogenetic analysis of a dengue virus serotype 3 isolated from a Chinese traveler returned from Laos
Creators: name: Mo, Ling
name: Shi, Jiandong
name: Guo, Xiaofang
name: Zeng, Zhaoping
name: Hu, Ningzhu
name: Sun, Jing
name: Wu, Meini
name: Zhou, Hongning
name: Hu, Yunzhang
Publisher: name: figshare
Year: 2018
Subjects: subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Table S1. Typical primers of dengue virus. (DOC 32Â kb)
Charm Hadronic Decays From FOCUS: Lessons Learnt
Creators: name: Bianco, Stefano
name: Pedrini, Daniele
name: Reis, Alberto
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The FOCUS photoproduction experiment took data in the ninenties and produced a wealth of results in charm physics. Some of the studies were seminal for contemporary experiments, and even paved the way for the technology of many charm and beauty analysis tools.
description: Presented by S.Bianco at CHARM2010, IHEP Beijing. Six pages, 2 figures