cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
X-ray emission from the extended disks of spiral galaxies
Creators: name: Owen, R. A.
name: Warwick, R. S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study of the X-ray properties of a sample of six nearby late-type spiral galaxies based on XMM-Newton observations. Since our primary focus is on the linkage between X-ray emission and star formation in extended, extranuclear galactic disks, we have selected galaxies with near face-on aspect and sufficient angular extent so as to be readily amenable to investigation with the moderate spatial resolution afforded by XMM-Newton. After excluding regions in each galaxy dominated by bright point sources, we study both the morphology and spectral properties of the residual X-ray emission, comprised of both diffuse emission and the integrated signal of the fainter discrete source populations. The soft X-ray morphology generally traces the inner spiral arms and shows a strong correlation with the distribution of UV light, indicative of a close connection between the X-ray emission and recent star formation. The soft (0.3-2 keV) X-ray luminosity to star formation rate (SFR) ratio varies from 1-5 x 10^39 erg/s(/Msun/yr), with an indication that the lower range of this ratio relates to regions of lower SFR density. The X-ray spectra are well matched by a two-temperature thermal model with derived temperatures of typically ~0.2 keV and ~0.65 keV, in line with published results for other normal and star-forming galaxies. The hot component contributes a higher fraction of the soft luminosity in the galaxies with highest X-ray/SFR ratio, suggesting a link between plasma temperature and X-ray production efficiency. The physical properties of the gas present in the galactic disks are consistent with a clumpy thin-disk distribution, presumably composed of diffuse structures such as superbubbles together with the integrated emission of unresolved discrete sources including young supernova remnants.
description: Accepted for publication in Monthly Notices of the Royal Astronomical Society. 17 pages, 6 figures, 7 tables
Discrete time heat kernel and UV modified propagators with Dimensional Deconstruction
Creators: name: Kan, Nahomi
name: Shiraishi, Kiyoshi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We revisit the dimensionally deconstructed scalar quantum electrodynamics and consider the (Euclidean) propagator of the scalar field in the model. Although we have previously investigated the one-loop effect in this model by obtaining the usual heat kernel trace, we adopt discrete proper-time heat kernels in this paper and aim to construct the modified propagator, which has improved behaviors in the ultraviolet region, by changing the range of sum of the discrete heat kernels.
description: 21 pages, no figure. Final version
MPEC 2024-S157 : 2024 SF4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SF4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
High-velocity collision of two black holes
Creators: name: Shibata, Masaru
name: Okawa, Hirotada
name: Yamamoto, Tetsuro
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study nonaxisymmetric collision of two black holes (BHs) with a high velocity $v=|dx^i/dx^0|=0.6$--$0.9c$ at infinity, where $x^μ$ denotes four-dimensional coordinates. We prepare two boosted BHs for the initial condition which is different from that computed by a simple moving-puncture approach. By extrapolation of the numerical results, we find that the impact parameter has to be smaller that $\approx 2.5GM_0/c^2$ for formation of a BH in the collision for $v \to c$, where $M_0 c^2$ is the initial total ADM mass energy of the system. For the critical value of the impact parameter, 20--30% of mass energy and 60--70% of angular momentum are dissipated by gravitational radiation for $v=0.6$--$0.9c$.
description: 5 pages, Phys. Rev. D in press
Directed flow of charged particles within idealized viscous hydrodynamics at energies available at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider
Creators: name: Jiang, Ze-Fang
name: Yang, C. B.
name: Peng, Qi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Following the Boz$\dot{\textrm{e}}$k-Wyskiel parametrization tilted initial condition, an alternative way to construct a longitudinal tilted fireball based on the Glauber collision geometry is presented. This longitudinal tilted initial condition combined with the Ideal-CLVisc (3 + 1)D hydrodynamic model, a nonvanishing directed flow coefficient $v_{1}$ in a wide rapidity range is observed. After comparing the model's results with experimentally observed data of directed flow coefficient $v_{1}(η)$ from $\sqrt{s_{NN}}$ = 200 GeV Cu + Cu, Au + Au collisions at RHIC energy to $\sqrt{s_{NN}}$ = 2.76 TeV and $\sqrt{s_{NN}}$ = 5.02 TeV Pb + Pb collisions at the LHC energy. We find that the directed flow measurements in heavy-ion collisions can set strong constraints on the imbalance of forward and backward incoming nuclei and on the magnitude asymmetry of pressure gradients along the $x$ direction.
description: 11 pages, 9 figures and 3 tables; any comments and feedback are welcome. To appear as a Regular Article in Physical Review C
title: Protesis osiculares y sus complicaciones. Todo lo que el radiólogo debe conocer.
Creators: name: GARCIA GOMEZ, MARIA SORAYA
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Head and neck
subject: Ear / Nose / Throat
subject: CT
subject: Prostheses

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Mostrar de forma didáctica la anatomía del oído medio,
y de la cadena osicular mediante Tc multidetector. Describir los hallazgos claves para el diagnóstico en tomografía computerizada de las prótesis osiculares y sus complicaciones. Ilustrar...
Evolutionary Changes of the Target Sites of Two MicroRNAs Encoded in the Hox Gene Cluster of Drosophila and Other Insect Species
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2011
Subjects: birth-and-death evolution
miR-iab-4
miR-iab-4as
miR-10
small RNA
target gene

description: MicroRNAs (miRs) are noncoding RNAs that regulate gene expression at the post-transcriptional level. In animals, the target sites of a miR are generally located in the 3' untranslated regions (UTRs) of messenger RNAs. However, how the target sites change during evolution is largely unknown. MiR-iab-4 and miR-iab-4as are known to regulate the expression of two Hox genes, Abd-A and Ubx, in Drosophila melanogaster. We have therefore studied the evolutionary changes of these two miR genes and their target sites of the Hox genes in Drosophila, other insect species, and Daphnia. Our homology search identified a single copy of each miR gene located in the same genomic position of the Hox gene cluster in all species examined. The seed nucleotide sequence was also the same for all species. Searching for the target sites in all Hox genes, we found several target sites of miR-iab-4 and miR-iab-4as in Antp in addition to Abd-A and Ubx in most insect species examined. Our phylogenetic analysis of target sites in Abd-A, Ubx, and Antp showed that the old target sites, which existed before the divergence of the 12 Drosophila species, have been well maintained in most species under purifying selection. By contrast, new target sites, which were generated during Drosophila evolution, were often lost in some species and mostly located in unalignable regions of the 3' UTRs. These results indicate that these regions can be a potential source of generating new target sites, which results in multiple target genes for each miR in animals.
On the Size Complexity of Non-Returning Context-Free PC Grammar Systems
Creators: name: Csuhaj-Varjú, Erzsébet
name: Vaszil, György
Publisher: name: arXiv
Year: 2009
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Improving the previously known best bound, we show that any recursively enumerable language can be generated with a non-returning parallel communicating (PC) grammar system having six context-free components. We also present a non-returning universal PC grammar system generating unary languages, that is, a system where not only the number of components, but also the number of productions and the number of nonterminals are limited by certain constants, and these size parameters do not depend on the generated language.
Characterization of Aquifex aeolicus ribonuclease III and the reactivity epitopes of its pre-ribosomal RNA substrates
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2011
Subjects: Amino Acid Sequence
Bacteria
Base Pairing
Base Sequence
Biocatalysis
Cations, Divalent
Enzyme Stability
Glutamine
Hydrogen-Ion Concentration
Molecular Sequence Data
RNA Precursors
RNA, Bacterial
RNA, Double-Stranded
RNA, Ribosomal
RNA, Ribosomal, 16S
RNA, Ribosomal, 23S
Ribonuclease III
Salts
Temperature

description: Ribonuclease III cleaves double-stranded (ds) structures in bacterial RNAs and participates in diverse RNA maturation and decay pathways. Essential insight on the RNase III mechanism of dsRNA cleavage has been provided by crystallographic studies of the enzyme from the hyperthermophilic bacterium, Aquifex aeolicus. However, the biochemical properties of A. aeolicus (Aa)-RNase III and the reactivity epitopes of its substrates are not known. The catalytic activity of purified recombinant Aa-RNase III exhibits a temperature optimum of ∼70-85°C, with either Mg2+ or Mn2+ supporting efficient catalysis. Small hairpins based on the stem structures associated with the Aquifex 16S and 23S rRNA precursors are cleaved at sites that are consistent with production of the immediate precursors to the mature rRNAs. Substrate reactivity is independent of the distal box sequence, but is strongly dependent on the proximal box sequence. Structural studies have shown that a conserved glutamine (Q157) in the Aa-RNase III dsRNA-binding domain (dsRBD) directly interacts with a proximal box base pair. Aa-RNase III cleavage of the pre-16S substrate is blocked by the Q157A mutation, which reflects a loss of substrate binding affinity. Thus, a highly conserved dsRBD-substrate interaction plays an important role in substrate recognition by bacterial RNase III. © 2011 The Author(s).
title: Y mi Essure ¿se habrá movido?
Creators: name: Ruiz Macarrilla, Sonia
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Motility
subject: Experimental investigations
subject: Hysterosalpingography
subject: Digital radiography
subject: Image manipulation / Reconstruction
subject: Experimental
subject: Genital / Reproductive system female

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
El dispositivo de control de la natalidad permanente Essure®, después de haber sido aprobado en la Unión Europea en noviembre de 2001,
se ha convertido en una alternativa popular a la ligadura de trompas.( Fig. 3 ) Al comparar este método con la...
A Survey of Self-Sovereign Identity Ecosystem
Creators: name: Soltani, Reza
name: Nguyen, Uyen Trang
name: An, Aijun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Self-sovereign identity is the next evolution of identity management models. This survey takes a journey through the origin of identity, defining digital identity and progressive iterations of digital identity models leading up to self-sovereign identity. It then states the relevant research initiatives, platforms, projects, and regulatory frameworks, as well as the building blocks including decentralized identifiers, verifiable credentials, distributed ledger, and various privacy engineering protocols. Finally, the survey provides an overview of the key challenges and research opportunities around self-sovereign identity.
description: 26 pages, 6 figures
title: MEDIASTINITIS FIBROSANTE: cuándo y cómo diagnosticarla?
Creators: name: Caldera Díaz, Adriana Carolina
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Arteriovenous malformations
subject: Hypertension
subject: CT
subject: MR
subject: Conventional radiography
subject: Thorax

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Definiremosla mediastinitis fibrosante (enfermedad inflamatoria benigna con proliferación de tejido fibroso que comprime estructuras mediastínicas),
describiendolas estructuras más frecuentemente afectadas,los hallazgos radiológicos,
la...
Mapping dynamic histone acetylation patterns to gene expression in nanog-depleted murine embryonic stem cells
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2010
Subjects: Acetylation
Animals
Cluster Analysis
Computational Biology
Embryonic Stem Cells
Gene Expression Profiling
Gene Expression Regulation
Gene Silencing
Genome-Wide Association Study
Histones
Homeodomain Proteins
Mice
Nanog Homeobox Protein
Phenotype

description: Embryonic stem cells (ESC) have the potential to self-renew indefinitely and to differentiate into any of the three germ layers. The molecular mechanisms for self-renewal, maintenance of pluripotency and lineage specification are poorly understood, but recent results point to a key role for epigenetic mechanisms. In this study, we focus on quantifying the impact of histone 3 acetylation (H3K9,14ac) on gene expression in murine embryonic stem cells. We analyze genome-wide histone acetylation patterns and gene expression profiles measured over the first five days of cell differentiation triggered by silencing Nanog, a key transcription factor in ESC regulation. We explore the temporal and spatial dynamics of histone acetylation data and its correlation with gene expression using supervised and unsupervised statistical models. On a genome-wide scale, changes in acetylation are significantly correlated to changes in mRNA expression and, surprisingly, this coherence increases over time. We quantify the predictive power of histone acetylation for gene expression changes in a balanced cross-validation procedure. In an in-depth study we focus on genes central to the regulatory network of Mouse ESC, including those identified in a recent genome-wide RNAi screen and in the PluriNet, a computationally derived stem cell signature. We find that compared to the rest of the genome, ESC-specific genes show significantly more acetylation signal and a much stronger decrease in acetylation over time, which is often not reflected in a concordant expression change. These results shed light on the complexity of the relationship between histone acetylation and gene expression and are a step toward dissecting the multilayer regulatory mechanisms that determine stem cell fate. © 2010 Markowetz et al.
KASB TANLASH MOTIVLARINI AHAMIYATIGA KO'RA O'ZARO BOG'LIQLIGI
Creators: name: Xaydaraliyev, Abdullo
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolamizda shaxslardagi kasb tanlashga ta’sir ko’rsatuvchi omillar haqida so’z yuritiladi. Kasb tanlashning tasnifi, yurtimizda olib borilayotgan kasb tanlashga doir islohiotlarning ahamiyati yoritib berilgan. Shuningdek, maqolada Farg‘ona tumanidagi 87 nafar o‘quvchi-yoshlarda o‘tkazilgan tadqiqotimizning matematik-statistik tahlilining tariflari beril o‘tilgan.
$DE$-type little strings from glued brane webs
Creators: name: Kim, Sung-Soo
name: Sugimoto, Yuji
name: Wei, Xing-Yue
name: Yagi, Futoshi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose brane web configurations for $D$-type and $E$-type $\mathcal{N}=(1,0)$ little string theories based on a trivalent or quadrivalent gluing of 5-brane web diagrams. Tri-/quadri-valent gluing is a powerful way of computing 5d/6d partition functions for supersymmetric gauge theories based on the topological vertex. We generalize the gluing techniques to little string theories by introducing a new compact direction and compute their supersymmetric partition functions on Omega-deformed $\mathbb{R}^4\times T^2$. As concrete examples, we consider little string theories arising from Type IIB NS5-branes probing $D_4$ or $D_5$ singularity. Their effective gauge theory descriptions as the affine $D_4$ or $D_5$ quiver gauge theory can be realized with quadrivalent or trivalent gluing, respectively. Based on these gluings of 5-brane webs, we compute their refined partition functions and compare them with the known results. We extend the computation of the partition function to little string theory engineered from IIB NS5-branes probing $E_6$ singularity based on a trivalent gluing. We also discuss the generalization to higher rank cases and the symmetries of the partition functions.
description: v2: 97 pages, 32 figures, typos corrected and clarifications added
Efficient Parallel Algorithm for Statistical Ion Track Simulations in Crystalline Materials
Creators: name: Jeon, Byoungseon
name: Grønbech-Jensen, Niels
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present an efficient parallel algorithm for statistical Molecular Dynamics simulations of ion tracks in solids. The method is based on the Rare Event Enhanced Domain following Molecular Dynamics (REED-MD) algorithm, which has been successfully applied to studies of, e.g., ion implantation into crystalline semiconductor wafers. We discuss the strategies for parallelizing the method, and we settle on a host-client type polling scheme in which a multiple of asynchronous processors are continuously fed to the host, which, in turn, distributes the resulting feed-back information to the clients. This real-time feed-back consists of, e.g., cumulative damage information or statistics updates necessary for the cloning in the rare event algorithm. We finally demonstrate the algorithm for radiation effects in a nuclear oxide fuel, and we show the balanced parallel approach with high parallel efficiency in multiple processor configurations.
description: 17 pages, seven figures, four tables
Detection of extremely low frequency gravitational wave using gravitational lens
Creators: name: Liu, Wenshuai
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The effect of gravitational wave of cosmological wavelength on the gravitational lensing is investigated. When the source, deflector, and observer are aligned in a highly symmetric configuration, an Einstein ring will be observed by the observer. There will be no time delays between different locations on the Einstein ring in the absence of gravitational wave. Otherwise, time delays between different locations on the Einstein ring will emerge if cosmological gravitational wave propagates through the system. Previous studies demonstrated that the time delay resulting from the aligned source-deflector-observer configuration in the presence of gravitational wave of cosmological wavelength could be equivalent to that of a similar lens with a nonaligned source-deflector-observer configuration in the absence of gravitational wave. Results in this work show that gravitational lens with the aligned source-deflector-observer configuration could serve as a potential gravitational wave detector when the whole Einstein ring observed by the observer is taken into account.
description: 5 pages, 1 figure. Published in Physical Review D
Numerical Study of Magnetic Island Coalescence Using Magnetohydrodynamics With Adaptively Embedded Particle-In-Cell Model
Creators: name: Li, Dion
name: Chen, Yuxi
name: Dong, Chuanfei
name: Wang, Liang
name: Toth, Gabor
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Collisionless magnetic reconnection typically requires kinetic treatments that are, in general, computationally expensive compared to fluid-based models. In this study, we use the magnetohydrodynamics with adaptively embedded particle-in-cell (MHD-AEPIC) model to study the interaction of two magnetic flux ropes. This innovative model embeds one or more adaptive PIC regions into a global MHD simulation domain such that the kinetic treatment is only applied in regions where kinetic physics is prominent. We compare the simulation results among three cases: 1) MHD with adaptively embedded PIC regions, 2) MHD with statically (or fixed) embedded PIC regions, and 3) a full PIC simulation. The comparison yields good agreement when analyzing their reconnection rates and magnetic island separations, as well as the ion pressure tensor elements and ion agyrotropy. In order to reach a good agreement among the three cases, large adaptive PIC regions are needed within the MHD domain, which indicates that the magnetic island coalescence problem is highly kinetic in nature where the coupling between the macro-scale MHD and micro-scale kinetic physics is important.
description: 9 pages, 10 figures
MPEC 2024-S158 : 2024 SG4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SG4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Black Holes as Probes of Moduli Space Geometry
Creators: name: Delgado, Matilda
name: Montero, Miguel
name: Vafa, Cumrun
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We argue that supersymmetric BPS states can act as efficient finite energy probes of the moduli space geometry thanks to the attractor mechanism. We focus on 4d $\mathcal{N}=2$ compactifications and capture aspects of the effective field theory near the attractor values in terms of physical quantities far away in moduli space. Furthermore, we illustrate how the standard distance in moduli space can be related asymptotically to the black hole mass. We also compute a measure of the resolution with which BPS black holes of a given mass can distinguish far away points in the moduli space. The black hole probes may lead to a deeper understanding of the Swampland constraints on the geometry of the moduli space.
description: 14 pages + appendix + references
Associations between chronic community noise exposure and blood pressure at rest and during acute noise and non-noise stressors among urban school children in India
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2010
Subjects: noise
blood pressure
stress
reactivity
habituation

description: The present study builds on prior research that has examined the association between children's chronic exposure to community noise and resting blood pressure and blood pressure dysregulation during exposure to acute stressors. A novel contribution of the study is that it examines how chronic noise exposure relates to blood pressure responses during exposure to both noise and non-noise acute stressors. The acute noise stressor was recorded street noise and the non-noise stressor was mental arithmetic. The sample consisted of 189 3rd and 6th grade children (51.9% percent boys; 52.9% 3rd graders) from a noisy (n = 95) or relatively quiet (n = 94) public school in the city of Pune, India. There were no statistically significant differences between chronic noise levels and resting blood pressure levels. However, relative to quiet-school children, noisy-school children had significantly lower increases in blood pressure when exposed to either an acute noise or non-noise stressor. This finding suggests that chronic noise exposure may result in hypo-reactivity to a variety of stressors and not just habituation to noise stressors. © 2010 by the authors.
On the Number of Membranes in Unary P Systems
Creators: name: Freund, Rudolf
name: Klein, Andreas
name: Kutrib, Martin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: We consider P systems with a linear membrane structure working on objects over a unary alphabet using sets of rules resembling homomorphisms. Such a restricted variant of P systems allows for a unique minimal representation of the generated unary language and in that way for an effective solution of the equivalence problem. Moreover, we examine the descriptional complexity of unary P systems with respect to the number of membranes.
Biogeography and potential exchanges among the atlantic equatorial belt cold-seep faunas
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2010
Subjects: Animals
Atlantic Ocean
Biodiversity
Classification
Cold Temperature
Ecosystem
Guinea
Mexico
Seawater

description: Like hydrothermal vents along oceanic ridges, cold seeps are patchy and isolated ecosystems along continental margins, extending from bathyal to abyssal depths. The Atlantic Equatorial Belt (AEB), from the Gulf of Mexico to the Gulf of Guinea, was one focus of the Census of Marine Life ChEss (Chemosynthetic Ecosystems) program to study biogeography of seep and vent fauna. We present a review and analysis of collections from five seep regions along the AEB: the Gulf of Mexico where extensive faunal sampling has been conducted from 400 to 3300m, the Barbados accretionary prism, the Blake ridge diapir, and in the Eastern Atlantic from the Congo and Gabon margins and the recently explored Nigeria margin. Of the 72 taxa identified at the species level, a total of 9 species or species complexes are identified as amphi-Atlantic. Similarity analyses based on both Bray Curtis and Hellinger distances among 9 faunal collections, and principal component analysis based on presence/absence of megafauna species at these sites, suggest that within the AEB seep megafauna community structure is influenced primarily by depth rather than by geographic distance. Depth segregation is observed between 1000 and 2000m, with the middle slope sites either grouped with those deeper than 2000m or with the shallower sites. The highest level of community similarity was found between the seeps of the Florida escarpment and Congo margin. In the western Atlantic, the highest degree of similarity is observed between the shallowest sites of the Barbados prism and of the Louisiana slope. The high number of amphi-atlantic cold-seep species that do not cluster according to biogeographic regions, and the importance of depth in structuring AEB cold-seep communities are the major conclusions of this study. The hydrothermal vent sites along the Mid Atlantic Ridge (MAR) did not appear as"stepping stones" for dispersal of the AEB seep fauna, however, the south MAR and off axis regions should be further explored to more fully test this hypothesis.© 2010 Olu et al.
Hard and Soft Physics at RHIC with implications for LHC
Creators: name: Tannenbaum, Michael J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Measurements of $π^0$, identified charged hadrons, direct-single-$γ$, direct single-$e^{\pm}$ and jets are expected to be important probes of the Quark Gluon Plasma (QGP) at LHC as they are at RHIC. Recent results from RHIC will be presented, with implications, possibly grave, for LHC. Issues of soft-physics, such as $E_T$ distributions, will be discussed with questions as to: whether the soft multipicity or sum-transverse energy ($E_T$), may be the only quantity at LHC to exhibit number of collision scaling? or whether the anisotropic flow ($v_2$) will exceed the hydrodynamic limit?
description: 22 pages, 18 figures, 4th International Workshop on High pT Physics at LHC (LHC09). New Fig. 1 (right). Typo's corrected
Investigation of the timing and spectral properties of an Ultra-luminous X-ray pulsar NGC 7793 P13
Creators: name: Lin, Lupin Chun-Che
name: Hu, Chin-Ping
name: Takata, Jumpei
name: Li, Kwan-Lok
name: Hui, C. Y.
name: Kong, A. K. H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We perform both timing and spectral analyses using the archival X-ray data taken with Swift, XMM-Newton, NICER, and NuSTAR from 2016 to 2020 to study an ultra-luminous pulsar, NGC 7793 P13, that showed a long period of super-Eddington accretion. We use the Rayleigh test to investigate the pulsation at different epochs, and confirm the variation of the pulse profile with the finite Gaussian mixture modelling and two-sample Kuiper test. Taking into account the periodic variation of the spin periods caused by the orbital Doppler effect, we further determine an orbital period of ~65 d and show that no significant correlation can be detected between the orbital phase and the pulsed fraction. The pulsed spectrum of NGC7793 P13 in 0.5-20keV can be simply described using a power-law with a high energy exponential cutoff, while the broad-band phase-averaged spectrum of the same energy range requires two additional components to account for the contribution of a thermal accretion disk and the Comptonization photons scattered into the hard X-rays. We find that NGC 7793 P13 stayed in the hard ultra-luminous state and the pulsed spectrum was relatively soft when the source was faint in the end of 2019. Moreover, an absorption feature close to 1.3 keV is marginally detected from the pulsed spectra and it is possibly associated with a cyclotron resonant scattering feature.
description: 13 pages, 6 figures and 5 tables, accepted by ApJ
Thermal susceptibility of the Planck-LFI receivers
Creators: name: Terenzi, L
name: Salmon, M J
name: Colin, A
name: Mennella, A
name: Morgante, G
name: Tomasi, M
name: Battaglia, P
name: Lapolla, M
name: Bersanelli, M
name: Butler, R C
name: Cuttaia, F
name: D'Arcangelo, O
name: Davis, R
name: Franceschet, C
name: Galeotta, S
name: Gregorio, A
name: Hughes, N
name: Jukkala, P
name: Kettle, D
name: Laaninen, M
name: Leutenegger, P
name: Leonardi, R
name: Mandolesi, N
name: Maris, M
name: Meinhold, P
name: Miccolis, M
name: Roddis, N
name: Sambo, L
name: Sandri, M
name: Silvestri, R
name: Tuovinen, J
name: Valenziano, L
name: Varis, J
name: Villa, F
name: Wilkinson, A
name: Zonca, A
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: This paper is part of the Prelaunch status LFI papers published on JINST: http://www.iop.org/EJ/journal/-page=extra.proc5/jinst . This paper describes the impact of the Planck Low Frequency Instrument front end physical temperature fluctuations on the output signal. The origin of thermal instabilities in the instrument are discussed, and an analytical model of their propagation and impact on the receivers signal is described. The experimental test setup dedicated to evaluate these effects during the instrument ground calibration is reported together with data analysis methods. Finally, main results obtained are discussed and compared to the requirements.
description: This is an author-created, un-copyedited version of an article accepted for publication in Journal of Instrumentation. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at 10.1088/1748-0221/4/12/T12012
Direct synthesis and chemical vapor deposition of 2D carbide and nitride MXenes
Creators: name: Wang, Di
name: Zhou, Chenkun
name: Filatov, Alexander S.
name: Cho, Wooje
name: Lagunas, Francisco
name: Wang, Mingzhan
name: Vaikuntanathan, Suriyanarayanan
name: Liu, Chong
name: Klie, Rober F.
name: Talapin, Dmitri V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Two-dimensional (2D) transition metal carbides and nitrides (MXenes) are a large family of materials actively studied for various applications, especially in the field of energy storage. To date, MXenes are commonly synthesized by etching the layered ternary compounds, MAX phases. Here we demonstrate a direct synthetic route for scalable and atom-economic synthesis of MXenes, including phases that have not been synthesized from MAX phases, by the reactions of metals and metal halides with graphite, methane or nitrogen. These directly synthesized MXenes showed excellent energy storage capacity for Li-ion intercalation. The direct synthesis enables chemical vapor deposition (CVD) growth of MXene carpets and complex spherulite-like morphologies. The latter form in a process resembling the evolution of cellular membranes during endocytosis.
description: 7 pages, 3 figures
On Languages Accepted by P/T Systems Composed of joins
Creators: name: Frisco, Pierluigi
name: Ibarra, Oscar H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: Recently, some studies linked the computational power of abstract computing systems based on multiset rewriting to models of Petri nets and the computation power of these nets to their topology. In turn, the computational power of these abstract computing devices can be understood by just looking at their topology, that is, information flow. Here we continue this line of research introducing J languages and proving that they can be accepted by place/transition systems whose underlying net is composed only of joins. Moreover, we investigate how J languages relate to other families of formal languages. In particular, we show that every J language can be accepted by a log n space-bounded non-deterministic Turing machine with a one-way read-only input. We also show that every J language has a semilinear Parikh map and that J languages and context-free languages (CFLs) are incomparable.
Toward a Global Dispersive Optical Model for the Driplines
Creators: name: Barbieri, C.
name: Charity, R. J.
name: Dickhoff, W. H.
name: Sobotka, L. G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A dispersive-optical-model analysis has been performed for both protons and neutrons on 40,42,44,48Ca isotopes. The fitted potentials describe accurately both scattering and bound quantities and extrapolate well to other stable nuclei. Further experimental information will be gathered to constrain extrapolations toward the driplines.
description: Invited talk at the "10th International Conference on Nucleus-Nucleus Collisions", Beijing, 16-21 August 2009
The Spin-dependent Structure Function of the Proton g_1^p and a Test of the Bjorken Sum Rule
Creators: name: The COMPASS Collaboration
name: Alekseev, M. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The inclusive double-spin asymmetry, A_1^p, has been measured at COMPASS in deepinelastic polarised muon scattering off a large polarised NH3 target. The data, collected in the year 2007, cover the range Q2 > 1 (GeV/c)^2, 0.004 < x < 0.7 and improve the statistical precision of g_1^p(x) by a factor of two in the region x < 0.02. The new proton asymmetries are combined with those previously published for the deuteron to extract the non-singlet spin-dependent structure function g_1^NS(x,Q2). The isovector quark density, Delta_q_3(x,Q2), is evaluated from a NLO QCD fit of g_1^NS. The first moment of Delta_q3 is in good agreement with the value predicted by the Bjorken sum rule and corresponds to a ratio of the axial and vector coupling constants g_A/g_V = 1.28+-0.07(stat)+-0.10(syst).
description: 12 pages, 5 figures
Hepatobiliary diseases in small animals: 
a comparison of ultrasonography and multidetector-row computed tomography
Creators: name: Borsetto, Antonella <1977>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: VET/08 Clinica medica veterinaria

description: Ultrasonography (US) is an essential imaging tool for identifying abnormalities of the liver parenchyma, biliary tract and vascular system. US has replaced radiography as the initial imaging procedure in screening for liver disease in small animals. There are few reports of the use of conventional and helical computed tomography (CT) to assess canine or feline parenchymal and neoplastic liver disease and biliary disorders. In human medicine the development of multidetector- row helical computed tomography (MDCT), with its superior spatial and temporal resolution, has resulted in improved detection and characterization of diffuse and focal liver lesions. The increased availability of MDCT in veterinary practice provides incentive to develop MDCT protocols for liver imaging in small animals. The purpose of this study is to assess the rule of MDCT in the characterization of hepatobiliary diseases in small animals; and to compare this method with conventional US. Candidates for this prospective study were 175 consecutive patients (dogs and cats) referred for evaluation of hepatobiliary disease. The patients underwent liver US and MDCT. Percutaneous needle biopsy was performed on all liver lesions or alterations encountered. As for gallbladder, histopatological evaluation was obtained from cholecystectomy specimens. Ultrasonographic findings in this study agreed well with those of previous reports. A protocol for dual-phase liver MDCT in small animals has been described. MDCT findings in parenchymal disorders of the liver, hepatic neoplasia and biliary disorders are here first described in dogs and cats and compared with the corresponding features in human medicine. The ability of MDCT in detection and characterization of hepatobiliary diseases in small animals is overall superior to conventional US. Ultrasonography and MDCT scanning, however, play complementary rules in the evaluation of these diseases. Many conditions have distinctive imaging features that may permit diagnosis. In most instances biopsy is required for definitive diagnosis.
Head-Tail Galaxies: Beacons of High-Density Regions in Clusters
Creators: name: Mao, Minnie Y.
name: Johnston-Hollitt, Melanie
name: Stevens, Jamie B.
name: Wotherspoon, Simon J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using radio data at 1.4 GHz from the ATCA we identify five head-tail (HT) galaxies in the central region of the Horologium-Reticulum Supercluster (HRS). Physical parameters of the HT galaxies were determined along with substructure in the HRS to probe the relationship between environment and radio properties. Using a density enhancement technique applied to 582 spectroscopic measurements in the 2 degree x 2 degree region about A3125/A3128, we find all five HT galaxies reside in regions of extremely high density (>100 galaxies/Mpc^3). In fact, the environments surrounding HT galaxies are statistically denser than those environments surrounding non-HT galaxies and among the densest environments in a cluster. Additionally, the HT galaxies are found in regions of enhanced X-ray emission and we show that the enhanced density continues out to substructure groups of 10 members. We propose that it is the high densities that allow ram pressure to bend the HT galaxies as opposed to previously proposed mechanisms relying on exceptionally high peculiar velocities.
description: 12 pages, 5 figures, accepted in MNRAS
Nuclear orientation of Bi²⁰⁶ in nickel
Creators: name: McConnell, Peter Robert Henderson
Publisher: name: University of British Columbia
Year: 2010

description: A study of the Pb²⁰⁶ decay was performed by Nuclear Orientation 206 of Bi²⁰⁶ nuclei in a Nickel host at very low temperatures. The hyperfine field of Bi²⁰⁶/Ni was determined to be 400 ± 34 kiloGauss, with only 65 % of the Bismuth nuclei occupying 'good' lattice sites. Mixing ratios were determined for several transitions in the Pb²⁰⁶ decay. Attenuation coefficients due to reorientation effects in the isomeric state at 2200 keV, excitation in Pb²⁰⁶ were measured. A discussion of the fractional occupation of 'good' lattice sites By the Bismuth nuclei is given.
R-Roscovitine (Seliciclib) prevents DNA damage-induced cyclin A1 upregulation and hinders non-homologous end-joining (NHEJ) DNA repair
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2010
Subjects: Cyclin A1
DNA Damage
DNA Repair
Doxorubicin
Hydrogen-Ion Concentration
Protein Kinase Inhibitors
Purines
Roscovitine
Up-Regulation

description: Background: CDK-inhibitors can diminish transcriptional levels of cell cycle-related cyclins through the inhibition of E2F family members and CDK7 and 9. Cyclin A1, an E2F-independent cyclin, is strongly upregulated under genotoxic conditions and functionally was shown to increase NHEJ activity. Cyclin A1 outcompetes with cyclin A2 for CDK2 binding, possibly redirecting its activity towards DNA repair. To see if we could therapeutically block this switch, we analyzed the effects of the CDK-inhibitor R-Roscovitine on the expression levels of cyclin A1 under genotoxic stress and observed subsequent DNA damage and repair mechanisms.Results: We found that R-Roscovitine alone was unable to alter cyclin A1 transcriptional levels, however it was able to reduce protein expression through a proteosome-dependent mechanism. When combined with DNA damaging agents, R-Roscovitine was able to prevent the DNA damage-induced upregulation of cyclin A1 on a transcriptional and post-transcriptional level. This, moreover resulted in a significant decrease in non-homologous end-joining (NHEJ) paired with an increase in DNA DSBs and overall DNA damage over time. Furthermore, microarray analysis demonstrated that R-Roscovitine affected DNA repair mechanisms in a more global fashion.Conclusions: Our data reveal a new mechanism of action for R-Roscovitine on DNA repair through the inhibition of the molecular switch between cyclin A family members under genotoxic conditions resulting in reduced NHEJ capability. © 2010 Federico et al; licensee BioMed Central Ltd.
Organic heterostructure approach for multifunctional light-emitting field-effect transistors
Creators: name: Generali, Gianluca <1977>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: FIS/03 Fisica della materia

description: The possibility of combining different functionalities in a single device is of great relevance for further development of organic electronics in integrated components and circuitry. Organic light-emitting transistors (OLETs) have been demonstrated to be able to combine in a single device the electrical switching functionality of a field-effect transistor and the capability of light generation. 
A novel strategy in OLET realization is the tri-layer vertical hetero-junction. This configuration is similar to the bi-layer except for the presence of a new middle layer between the two transport layers. This “recombination” layer presents high emission quantum efficiency and OLED-like (Organic Light-Emitting Diode) vertical bulk mobility value.
The key idea of the vertical tri-layer hetero-junction approach in realizing OLETs is that each layer has to be optimized according to its specific function (charge transport, energy transfer, radiative exciton recombination). Clearly, matching the overall device characteristics with the functional properties of the single materials composing the active region of the OFET, is a great challenge that requires a deep investigation of the morphological, optical and electrical features of the system.
As in the case of the bi-layer based OLETs, it is clear that the interfaces between the dielectric and the bottom transport layer and between the recombination and the top transport layer are crucial for guaranteeing good ambipolar field-effect electrical characteristics. Moreover interfaces between the bottom transport and the recombination layer and between the recombination and the top transport layer should provide the favourable conditions for the charge percolation to happen in the recombination layer and form excitons.
Organic light emitting transistor based on the tri-layer approach with external quantum efficiency out-performing the OLED state of the art has been recently demonstrated [Capelli et al., Nat. Mater. 9 (2010) 496-503] widening the scientific and technological interest in this field of research.