cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A new sample of warm extreme debris disks from the ALLWISE catalog
Creators: name: Moór, Attila
name: Ábrahám, Péter
name: Szabó, Gyula
name: Vida, Krisztián
name: Cataldi, Gianni
name: Derekas, Alíz
name: Henning, Thomas
name: Kinemuchi, Karen
name: Kóspál, Ágnes
name: Kovács, József
name: Pál, András
name: Sarkis, Paula
name: Seli, Bálint
name: Szabó, Zsófia M.
name: Takáts, Katalin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Extreme debris disks (EDDs) are rare systems with peculiarly large amounts of warm dust that may stem from recent giant impacts between planetary embryos during the final phases of terrestrial planet growth. Here we report on the identification and characterization of six new EDDs. These disks surround F5-G9 type main-sequence stars with ages >100 Myr, have dust temperatures higher than 300K and fractional luminosities between 0.01 and 0.07. Using time-domain photometric data at 3.4 and 4.6$μ$m from the WISE all sky surveys, we conclude that four of these disks exhibited variable mid-infrared emission between 2010 and 2019. Analyzing the sample of all known EDDs, now expanded to 17 objects, we find that 14 of them showed changes at 3-5$μ$m over the past decade suggesting that mid-infrared variability is an inherent characteristic of EDDs. We also report that wide-orbit pairs are significantly more common in EDD systems than in the normal stellar population. While current models of rocky planet formation predict that the majority of giant collisions occur in the first 100 Myr, we find that the sample of EDDs is dominated by systems older than this age. This raises the possibility that the era of giant impacts may be longer than we think, or that some other mechanism(s) can also produce EDDs. We examine a scenario where the observed warm dust stems from the disruption and/or collisions of comets delivered from an outer reservoir into the inner regions, and explore what role the wide companions could play in this process.
description: 39 pages, 11 figures, accepted for publication in ApJ
Sequential decision problems in online education
Creators: name: Pike-Burke, Ciara
Publisher: name: Lancaster University
Year: 2019
Subjects: Multi-armed bandit
Sequential decision making

description: This thesis is concerned with the study of sequential decision problems
      motivated by the challenge of selecting questions to give to students in
      an online educational environment. In online education there is the
      potential to develop personalized and adaptive learning environments,
      where students can receive individualized sequences of questions which
      update as the student is observed to be struggling or flourishing. In
      order to achieve this personalization, we must learn about how good each
      question is, while simultaneously giving students good questions.
      Multi-armed bandits are a popular technique for sequential decision making
      under uncertainty. Due to their online nature and their ability to balance
      the trade-off between exploitation and exploration, multi-armed bandits
      lend themselves naturally to this problem of adaptively selecting
      questions in education software. However, due to the complexity of the
      educational problem, standard approaches to multi-armed bandits cannot be
      applied directly. In this thesis variants of the multi-armed bandit
      problem specifically motivated by the issues arising in the educational
      domain are considered. Particular focus will be placed on ton the
      statistical and mathematical foundations of such approaches.
Single cell transcriptome atlas of pig
Creators: name: 丁佩文(Peiwen Ding)
Publisher: name: CNGB
Year: 2021
Subjects: Raw sequence reads
Transcriptome or Gene expression
Multiisolate

description: The domestic pig has been used as one of the most important large animal models for human biomedical research largely due to the postulation of its physiological similarity to human, but insights into the cellular heterogeneity and similarity between pig and human at the single-cell transcriptome level are still limited. Here, we leverage the single cell transcriptome analysis to profile 224,763 cells from 20 porcine tissues from 10 organs, and identified 58 main cell types.
Covariant calculation of strange decays of baryon resonances
Creators: name: Sengl, B.
name: Melde, T.
name: Plessas, W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present results for kaon decay widths of baryon resonances from a relativistic study with constituent quark models. The calculations are done in the point-form of Poincare-invariant quantum mechanics with a spectator-model decay operator. We obtain covariant predictions of the Goldstone-boson-exchange and a variant of the one-gluon-exchange constituent quark models for all kaon decay widths of established baryon resonances. They are generally characterized by underestimating the available experimental data. In particular, the widths of kaon decays with increasing strangeness in the baryon turn out to be extremely small. We also consider the nonrelativistic limit, leading to the familiar elementary emission model, and demonstrate the importance of relativistic effects. It is found that the nonrelativistic approach evidently misses sensible influences from Lorentz boosts and some essential spin-coupling terms.
description: 6 pages, 3 tables
title: Le vieillissement en prison
title: Aperçu de la prise en soins des détenus âgés et recommandations infirmières
titleType: Subtitle
title: Le vieillissement en prison
titleType: AlternativeTitle
Creators: name: Abdoulaye, Halima
name: Devaud, Émeline
Publisher: name: Unknown
Year: 0
Subjects: subject: détenus âgés
subject: prisonniers âgés
subject: prisons
subject: établissements pénitentiaires
subject: service médical carcéral
subject: soins infirmiers
subject: santé mentale

description: Problématique : En Suisse, la population des détenus âgés (50 ans ou plus) a doublé durant ces 25 dernières années. Ces détenus présentent de multiples pathologies et handicaps dus à l’âge, accentués par le vieillissement précoce lié aux conditions de détention. Face à ce phénomène, se pose le problème de l’inadéquation des prisons à répondre aux besoins spécifiques de cette population. But et question de recherche : À travers ce travail, nous souhaitons identifier les problèmes de santé, ainsi que les besoins des détenus âgés, durant leur période de détention. Méthode : Une recherche documentaire a été réalisée dans les bases de données CINHAL et PubMed. Les descripteurs utilisés lors de cette recherche correspondent aux concepts « détenus âgés », « soins infirmiers », « domaine médical » et « établissements pénitentiaires ». Résultats : Cinq articles ont été retenus au terme de notre recherche documentaire, provenant d’études réalisées en Suisse, France, Angleterre et États-Unis. La synthèse des résultats met en évidence plusieurs thèmes : l’influence des parcours de vie des détenus âgés sur leur santé, la sous-évaluation des pathologies ainsi que des handicaps dans les AVQ, les sources de vulnérabilité des détenus âgés, les obstacles matériels et psychologiques aux soins, les besoins de traitements et environnement adaptés. Discussion : Les résultats, discutés à l’aide de la Théorie de la Transition de Meleis, montrent la nécessité d’améliorer l’évaluation précoce des problèmes de santé, notamment des troubles cognitifs, de renforcer les collaborations avec les agents de détention pour trouver des solutions (ex : mobilité), de veiller à l’adéquation des traitements et à la continuité des soins après la libération. Conclusion : L’augmentation de la population des détenus âgés génère de nombreux défis auxquels il est nécessaire d’apporter des réponses adéquates (environnement matériel adapté aux handicaps physiques et sensoriels, dépistages précoces, EMS sécurisés). L’exemple de l’inadaptation des infrastructures et des déficits de couverture par l’assurance maladie montre que la Suisse doit encore trouver ses propres solutions à cette problématique.
The Conformal Penrose Limit: Back to Square One
Creators: name: Gueven, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show that the conformal Penrose limit is an ordinary plane wave limit in a higher dimensional framework which resolves the spacetime singularity. The higher dimensional framework is provided by Ricci-flat manifolds which are of the form M_D = M_d x B, where M_d is an Einstein spacetime that has a negative cosmological constant and admits a spacelike conformal Killing vector, and B is a complete Sasaki-Einstein space with constant sectional curvature. We define the Kaluza-Klein metric of M_D through the conformal Killing potential of M_d and prove that M_d has a conformal Penrose limit if and only if M_D has an ordinary plane wave limit. Further properties of the limit are discussed.
description: 16 pages, LaTeX
Prediction for new magnetoelectric fluorides
Creators: name: Nénert, G.
name: Palstra, T. T. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use symmetry considerations in order to predict new magnetoelectric fluorides. In addition to these magnetoelectric properties, we discuss among these fluorides the ones susceptible to present multiferroic properties. We emphasize that several materials present ferromagnetic properties. This ferromagnetism should enhance the interplay between magnetic and dielectric properties in these materials.
description: 12 pages, 4 figures, To appear in Journal of Physics: Condensed Matter
Two-dimensional Ising model with competing interactions and its application to clusters and arrays of $π$-rings and adiabatic quantum computing
Creators: name: O'Hare, A.
name: Kusmartsev, F. V.
name: Kugel, K. I.
name: Laad, M. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study planar clusters consisting of loops including a Josephson $π$-junction ($π$-rings). Each $π$-ring carries a persistent current and behaves as a classical orbital moment. The type of particular state associated with the orientation of orbital moments at the cluster depends on the interaction between these orbital moments and can be easily controlled, i.e. by a bias current or by other means. We show that these systems can be described by the two-dimensional Ising model with competing nearest-neighbor and diagonal interactions and investigate the phase diagram of this model. The characteristic features of the model are analyzed based on the exact solutions for small clusters such as a 5-site square plaquette as well as on a mean-field type approach for the infinite square lattice of Ising spins. The results are compared with spin patterns obtained by Monte Carlo simulations for the 100 $\times$ 100 square lattice and with experiment. We show that the $π$-ring clusters may be used as a new type of superconducting memory elements. The obtained results may be verified in experiments and are applicable to adiabatic quantum computing where the states are switched adiabatically with the slow change of coupling constants.
description: 32 pages, 22 figures, RevTex
Net primary production of lodgepole pine (Pinus Contort A var. Latifolia engelm.) in some ecosystems in Southeastern British Columbia
Creators: name: Comeau, Philip George
Publisher: name: University of British Columbia
Year: 2010

description: Relationships between net primary production and tree canopy parameters were investigated in 30 unmanaged stands of lodgepole pine (Pinus contort a var. I atifolia Engelm.) growing on sites with two contrasting hygrotopes (soil moisture regimes) and two contrasting trophotopes (soil nutrient regimes) in southeastern British Columbia. Sampled stands were between 50 and 130 years-of-age. Estimates of aboveground production (ANPP) were obtained for all 30 stands, and estimates of total (aboveground plus belowground) production (TNPP) were obtained for four stands. ANPP ranged from 2.2 to 4.4 t ha⁻¹yr⁻¹ for the xeric hygrotopes and from 2.9 to 7.4 t ha⁻¹yr⁻¹ for the sites with mesic hygrotopes. Variation in ANPP was explained by variation in stand foliage biomass, stand density, and age. Multiple regression equations fitted to data from each hygrotope differed significantly (a=0.05). The higher rates of ANPP observed in stands from mesic sites were attributed to the larger quantities of foliage biomass and to greater ANPP per kg of foliage (Foliage Efficiency) than in stands from the xeric sites. Total net primary production ranged from 7.9 to 11.9 t ha⁻¹yr⁻¹ in four stands. Belowground net primary production averaged 60% of TNPP on the two xeric sites and 42% of TNPP on the two mesic sites. This difference in production allocation between the two hygrotopes explains some of the between-site variation in foliage efficiency which was not accounted for by variation in foliage biomass. On the xeric sites, where moisture deficiencies appear to be limiting production, a multiple regression equation using foliage biomass, stand density, and stand age provided a better prediction of ANPP than did an equation which used foliage nitrogen content, stand density and stand age. Stand foliage biomass and stand density were significant variables in describing variation in foliage nitrogen efficiency (ANPP per kg of foliage nitrogen; an extension of the concept of "nitrogen productivity"). Either foliage efficiency or foliage nitrogen efficiency, in combination with data on the allocation of TNPP offer potentially useful alternatives to carbon budgets as driving functions for simulation models of forest production.
L'interpretazione conforme a Costituzione. Aspetti teorici e applicazioni pratiche.
Creators: name: Gliatta, Maria Antonella
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2013

description: Il lavoro affronta il tema dell’interpretazione conforme a Costituzione all’interno del modello di giustizia costituzionale italiano da una prospettiva prima teorica e, poi, applicativa. Sul primo versante, l’attività di adeguamento interpretativo delle leggi a Costituzione diventa sede privilegiata per la costruzione di un modello di controllo incidentale delle leggi strumentale alla tutela delle posizioni soggettive costituzionalmente rilevanti. Sul secondo versante, occasione di verifica dei modi di esercizio della funzione giurisdizionale di fronte a domande di giustizia non soddisfatte in sede legislativa.
Produzione di informazione statistica ufficiale: il ruolo dei dati testuali
Creators: name: Triunfo, Nicole
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2013

description: L'incessante sviluppo tecnologico e la crescente diffusione di dispositivi collegabili alla rete Internet sta creando una nuova miniera informativa utile per la produzione di informazioni. Le nuove tecnologie di comunicazione offrono opportunità di raccolta di dati semplificate che dovrebbero ridurre l'onere statistico gravante sulle imprese e migliorare la qualità delle informazioni statistiche.
L'uso di queste fonti rappresenta una grande opportunità per gli istituti nazionali di statistica ancora non sufficientemente sfruttata a causa dei problemi connessi alla raccolta dei dati. Per contribuire al raggiungimento di questo obiettivo questo lavoro di tesi propone strumenti di text mining utili a facilitare il maggiore uso dei documenti espressi in linguaggio naturale. In particolare è stato proposto l'uso dell'analisi delle corrispondenze lessicali unitamente alla network analysis per la costruzione di risorse statistico linguistiche. Inoltre è stata proposta una strategia di text classification, per la costruzione di strumenti di interrogazione di testi: le query testuali.
In ultimo, è stata proposto l'uso di un metodo fattoriale vincolato (analisi delle corrispondenze canoniche), per una analisi congiunta di variabili quantitative e testuali. Questo strumento consente di arricchire e comprendere i dati numerici con l'ausilio di dati testuali (parole).
A titolo di esempio sono presentate alcune applicazioni a dati reali.
Investigation of chromosomal structural abnormalities in patients with undiagnosed neurodevelopmental disorders
Creators: name: 董梓瑞(DONG, Zirui Elvis)
Publisher: name: CNGB
Year: 2021
Subjects: Genome sequencing and assembly
Multiisolate
Medical

description: Background: Genomic structure variations (SVs) are various types of the genome rearrangements entangling at least 50 nucleotides. SVs are known to play a significant role in contributing human genomic disorders. It includes the unbalanced gains or losses of DNA (copy number changes, CNVs), balanced rearrangement, such as inversion or translocations, and complex combinations of several distinct rearrangements. Disease-causing CNV analysis for patients with development delay/intellectual disability (DD/ID), autism spectrum disorders (ASD) or multiple congenital anomalies (MCA) has been implemented as first tier genetic investigation for decades. Recently, different types of genome sequencing tests have been introduced in detecting CNVs to replace CMA or developing to cover other types of SVs with clinical significance and segmental absence of heterozygosity (AOH). For this purpose, we aim to evaluate the additional contributions of structure variations and AOH in the neurodevelopmental diseases. Method：in this study we applied large insert (~5Kb) mate-pair low pass (~4X) genome sequencing method in a cohort of 100 patients with neurodevelopmental disorders who did not receive informative results of first-tier copy number changes investigations. Results: Firstly we re-examined previously reported CNVs in this cohort which were all validated by the mate-pair low pass GS approach while 80% of duplications were further elucidated with structure. Besides this, 15% of cases were detected with rare or complex SVs down to 10Kb resolution and 22% case with AOH >=5Mb including one patient with 214.5Mb spread on 13 autosomal chromosomes. Conclusion: In this study, we show the applicability of mate-pair low pass GS in patients with undiagnostic neurodevelopmental disorders. This approach complements first tier CNV analysis for the NND not only through increasing the resolution of copy number changes detection but also better characterization of chromosomal rearrangements and discovery of potential causative regions or genes.
The Association between Lysosomal Storage Disorder Genes and Parkinson’s Disease
Creators: name: 赵宇文(Zhao Yuwen)
Publisher: name: CNGB
Year: 2021
Subjects: Exome
Variation
Monoisolate
Medical

description: We explored the association between rare variants of 69 LSDs genes and Parkinson disease in 3879 patients and 2931 controls from PD-MDCNC using next-generation sequencing. We identified the significant burden of rare putative LSDs gene variants in Chinese mainland Parkinson disease patients. Our findings supported the association between LSDs genes and Parkinson disease and revealed several novel risk genes in Chinese mainland Parkinson disease patients.
Guidelines and Environment to Support Sustainable Software Development at DLR
Creators: name: Schlauch, Tobias
name: Haupt, Carina
Publisher: name: Zenodo
Year: 2019
Subjects: Software Engineering
Guidelines
Research
Training

description: Research software is often developed by scientists who are domain experts. Most of them have no specific education in software development. At the German Aerospace Center (DLR), we started an initiative for better research software to help scientists developing and sustaining their software. The central elements of the initiative are practical software development guidelines and the establishment of a supportive environment. The guidelines describe the desired development practice. The environment is established with this practice in mind and consists of offers such as central tools, training, and opportunities for knowledge exchange. Both elements are further developed by a joint community at DLR. In this talk, we briefly introduce the guidelines and the environment for research software developers at DLR. Particularly, we focus on the minimum practice imposed by the guidelines and show the interplay between guidelines and environment. Concretely, we present the concept of our new training. It connects the minimum practice with the usage of our GitLab-based software development collaboration platform on the basis of hands-on exercises. Finally, we share our experience with the training which has been taken by about 100 participants so far.
A preliminary analysis of the energy transfer between the dark sectors of the Universe
Creators: name: Zhou, Jia
name: Wang, Bin
name: Pavon, Diego
name: Abdalla, Elcio
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the mutual interaction between the dark sectors (dark matter and dark energy) of the Universe by resorting to the extended thermodynamics of irreversible processes and constrain the former with supernova type Ia data. As a byproduct, the present dark matter temperature results in good agreement with independent estimates of the temperature of the gas of sterile neutrinos.
description: 12 pages, 2 figures
Cancerogenesi vescicale associata a papillomavirus bovino tipo 2 (BPV-2) in grossi ruminanti
Creators: name: Lucà, Roberta
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2013

description: I Papillomavirus bovini sono tra i virus animali più studiati per il loro potenziale legame diretto tra infezione virale e neoplasie. In genere, nei bovini, i papillomi risultano essere rari e normalmente regrediscono dopo circa un anno dalla loro comparsa sebbene in soggetti non immuno-competenti essi tendano a diffondersi. Nel caso di animali allo stato brado, tale immunosoppressione può derivare anche dall'ingestione di sostanze tossiche contenute nella felce (Pteridium Aquilinum) (Campo, 2002; Borzacchiello et al., 2003). Recenti studi hanno ulteriormente confermato una stretta sinergia tra papillomavirus (BPV) e Pteridium aquilinum.
   Il DNA di papillomavirus bovino tipo 2 (BPV-2) è stato riscontrato nel 69% dei tumori vescicali spontanei ed in circa il 46% dei tumori vescicali sperimentalmente indotti (Campo et al., 1992; Borzacchiello et al., 2003; Roperto et al., 2008; Roperto et al., 2011).
Recentemente l’infezione da papillomavirus bovino tipo 2 (BPV-2) è stata ampiamente descritta anche in bufali nei quali il virus gioca un ruolo importante nella trasformazione cellulare dell’urotelio (Roperto et al., 2013).
Theory of Hofstadter Superconductors
Creators: name: Shaffer, Daniel
name: Wang, Jian
name: Santos, Luiz H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study mean-field states resulting from the pairing of electrons in time-reversal broken fractal Hofstadter bands, which arise in two-dimensional lattices where the unit cell traps magnetic flux $Φ= (p/q)Φ_0$ comparable to the flux quantum $Φ_0 = h/e$. It is established that the dimension and degeneracy of the irreducible representations of the magnetic translation group (MTG) furnished by the charge 2e pairing fields have different properties from those furnished by single particle Bloch states, and in particular are shown to depend on the parity of the denominator $q$. We explore this symmetry analysis to formulate a Ginzburg-Landau theory describing the thermodynamic properties of Hofstadter superconductors at arbitrary rational flux $Φ= (p/q)Φ_0$ in terms of a multicomponent order parameter that describes the finite momentum pairing of electrons across different Fermi surface patches. This phenomenological theory leads to a rich phase diagram characterized by different symmetry breaking patterns of the MTG, which can be interpreted as distinct classes of vortex lattices. A class of $\mathbb{Z}_q$-symmetric Hofstadter SCs is identified, in which the MTG breaks down to a $\mathbb{Z}_q$ subgroup. We study the topological properties of such $\mathbb{Z}_q$-symmetric Hofstadter SCs and show that the parity of the Chern numbers is fixed by the parity of $q$. We identify the conditions for the realization of Bogoliubov Fermi surfaces in the presence of parity and MTG symmetries, establishing a novel topological invariant capturing the existence of such charge-neutral gapless excitations. Our findings, which could bear relevance to the description of re-entrant superconductivity in moiré systems in the Hofstadter regime, establish Hofstadter SC as a fertile setting to explore symmetry broken and topological orders.
description: 29 pages, 5 figures
Mott transition in anharmonic confinement
Creators: name: Lundh, Emil
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Two effects are identified that affect the visibility of the Mott transition in an atomic gas in an optical lattice confined in a power-law potential. The transition can be made more pronounced by increasing the power law, but at the same time, experimental uncertainty in the number of particles will induce corresponding fluctuations in the measured condensate fraction. Calculations in two dimensions indicate that a potential slightly more flat-bottomed than a quadratic one is to be preferred for a wide range of particle number fluctuation size.
description: 4 pages, 4 figures
Identification of novel mutation sites in DNAH1 of multiple morphological anomalies of the flagella patients
Creators: name: 王雄(Xiong Wang)
Publisher: name: CNGB
Year: 2021
Subjects: Genome sequencing
Variation
Monoisolate
Medical

description: Male infertility affects approximately 7% of men worldwide. Multiple morphological anomalies of the flagella (MMAF) is characterised by several morphological defects in sperm flagella, including absent, short, bent, coiled, and/or irregular flagella. MMAF is a rare version of asthenozoospermia with serious consequences for male fertility.Here, we describe several novel compound heterozygous mutations and a novel homozygous mutation in DNAH1 from six independent MMAF patients.
Statistical Mechanics Analysis of LDPC Coding in MIMO Gaussian Channels
Creators: name: Alamino, Roberto C.
name: Saad, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using analytical methods of statistical mechanics, we analyse the typical behaviour of a multiple-input multiple-output (MIMO) Gaussian channel with binary inputs under LDPC network coding and joint decoding. The saddle point equations for the replica symmetric solution are found in particular realizations of this channel, including a small and large number of transmitters and receivers. In particular, we examine the cases of a single transmitter, a single receiver and the symmetric and asymmetric interference channels. Both dynamical and thermodynamical transitions from the ferromagnetic solution of perfect decoding to a non-ferromagnetic solution are identified for the cases considered, marking the practical and theoretical limits of the system under the current coding scheme. Numerical results are provided, showing the typical level of improvement/deterioration achieved with respect to the single transmitter/receiver result, for the various cases.
description: 25 pages, 7 figures
Large eddy simulations of cavitating flow in a step nozzle with injection into gas
Creators: name: Trummler, Theresa
name: Rahn, Daniel
name: Schmidt, Steffen J.
name: Adams, Nikolaus A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present results of large eddy simulations of a cavitating nozzle flow and injection into gas, investigating the interactions of cavitation in the nozzle, primary jet breakup, mass-flow rates, and gas entrainment. During strong cavitation, detached vapor structures can reach the nozzle outlet, leading to partial entrainment of gas from the outflow region into the nozzle. The gas entrainment can affect cavitation dynamics, mass-flow rates, and jet breakup. Moreover, the implosion of detached vapor structures induces pressure peaks that on the one hand amplify turbulent fluctuations and subsequently can enhance jet breakup and on the other hand can damage walls in the proximity and thus lead to cavitation erosion. Our numerical setup is based on a reference experiment, in which liquid water is discharged into ambient air through a step nozzle. The cavitating liquid and the non-condensable gas phase are modeled with a barotropic homogeneous mixture model while for the numerical model a high-order implicit large eddy approach is employed. Full compressibility of all components is taken into account, enabling us to capture the effects of collapsing vapor structures. Two operating points covering different cavitation regimes and jet characteristics are investigated. Special emphasis is placed on studying the effects of cavitation on the mass flow and the jet as well as the impact of partial gas entrainment. Therefore, frequency analyses of the recorded time-resolved signals are performed. Furthermore, the dynamics and intensities of imploding vapor structures are assessed.
description: accepted for publication in Atomization and Sprays, 24 pages, 12 figures
Angular momentum transport by internal gravity waves III - Wave excitation by core convection and the Coriolis effect
Creators: name: Pantillon, Florian P.
name: Talon, Suzanne
name: Charbonnel, Corinne
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This is the third in a series of papers that deal with angular momentum transport by internal gravity waves. We concentrate on the waves excited by core convection in a 3Msun, Pop I main sequence star. Here, we want to examine the role of the Coriolis acceleration in the equations of motion that describe the behavior of waves and to evaluate its impact on angular momentum transport. We use the so-called traditional approximation of geophysics, which allows variable separation in radial and horizontal components. In the presence of rotation, the horizontal structure is described by Hough functions instead of spherical harmonics. The Coriolis acceleration has two main effects on waves. It transforms pure gravity waves into gravito-inertial waves that have a larger amplitude closer to the equator, and it introduces new waves whose restoring force is mainly the conservation of vorticity. Taking the Coriolis acceleration into account changes the subtle balance between prograde and retrograde waves in non-rotating stars. It also introduces new types of waves that are either purely prograde or retrograde. We show in this paper where the local deposition of angular momentum by such waves is important.
description: 9 pages, 10 figures, accepted for publication by A&A
The genetic landscape of lower grade gliomas and glioblastoma
Creators: name: 李坤(Likun)
Publisher: name: CNGB
Year: 2021
Subjects: Raw sequence reads
Exome
Multiisolate

description: We collected tumor samples from 16 patients with lower grade gliomas (LGG) and 35 patients with glioblastoma (GBM), and performed whole exome sequencing (WES) analysis on them to compare the genomic characterization between LGG and GBM.
single cell RNA sequencing of PBMCs for patients with axial spondyloarthritis
Creators: name: 卞振华
Publisher: name: CNGB
Year: 2021
Subjects: Raw sequence reads
Transcriptome or Gene expression
Monoisolate
Medical

description: We characterized PBMCs subsets of 5 axial SpA patients before and after treatment compared with 4 healthy donors using single-cell multimodal omics, including single-cell transcriptomics and single-cell proteomics.
Cyrtodactylus
Creators: name: Luu, Vinh Quang
name: Bonkowski, Michael
name: Nguyen, Truong Quang
name: Le, Minh Duc
name: Schneider, Nicole
name: Ngo, Hanh Thi
name: Ziegler, Thomas
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Squamata
Gekkonidae
Cyrtodactylus

description: Cyrtodactylus species groups in Laos
 As currently recognized, 21 Cyrtodactylus species are known from Laos. Based on our molecular phylogeny, the molecular data presented in Nazarov et al. (2014), and a combination of characters including size, dorsal color pattern, scalation, and geographic distribution, we herein propose four species groups within the genus Cyrtodactylus occurring in Laos (see Table 13), which are defined as follows:
description: Published as part of Luu, Vinh Quang, Bonkowski, Michael, Nguyen, Truong Quang, Le, Minh Duc, Schneider, Nicole, Ngo, Hanh Thi & Ziegler, Thomas, 2016, Evolution in karst massifs: Cryptic diversity among bent-toed geckos along the Truong Son Range with descriptions of three new species and one new country record from Laos, pp. 101-140 in Zootaxa 4107 (2) on page 132, DOI: 10.11646/zootaxa.4107.2.1, http://zenodo.org/record/266526
On-shell Delta I = 3/2 kaon weak matrix elements with non-zero total momentum
Creators: name: Yamazaki, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present our results for the on-shell Delta I = 3/2 kaon decay matrix elements using domain wall fermions and the DBW2 gauge action at one coarse lattice spacing corresponding to 1/a = 1.31 GeV in the quenched approximation. The on-shell matrix elements are evaluated in two different frames: the center-of-mass frame and non-zero total-momentum frame. We employ the formula proposed by Lellouch and Lüscher in the center-of-mass frame, and its extension for non-zero total momentum frame to extract the infinite volume, on-shell, center-of-mass frame decay amplitudes. We determine the decay amplitude at the physical pion mass and momentum from the chiral extrapolation and an interpolation of the relative momentum using the results calculated in the two frames. We have obtained Re(A_2) = 1.66(23)(^{+48}_{-03})(^{+53}_{-0}) x 10^{-8} GeV and Im(A_2) = -1.181(26)(^{+141}_{-014})(^{+44}_{-0}) x 10^{-12} GeV at the physical point, using the data at the relatively large pion mass, m_pi > 0.35 GeV. The first error is statistic, and the second and third are systematic. The second error is estimated with several fits of the chiral extrapolation including (quenched) chiral perturbation formula at next to leading order using only lighter pion masses. The third one is estimated with an analysis using the lattice dispersion relation. The result of Re(A_2) is reasonably consistent with experiment.
description: 54 pages, 17 figures; added references, removed figure and corrected typo
Could $M_{T2}$ be a singularity variable?
Creators: name: Park, Chan Beom
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The algebraic singularity method is a framework for analyzing collider events with missing energy. It provides a way to draw out a set of singularity variables that can catch singular features originating from the projection of full phase space onto the observable phase space of measured particle momenta. It is a promising approach applicable to various physics processes with missing energy but still requires more studies for use in practice. Meanwhile, in the double-sided decay topology with an invisible particle on each side, the $M_{T2}$ variable has been known to be a useful collider observable for measuring particle masses from missing energy events or setting signal regions of collider searches. We investigate the relation between the two different types of kinematic variables in double-sided decay topology. We find that the singularity variables contain the $M_{T2}$ variable in many cases, although the former is not a strict superset of the latter.
description: 1+25 pages, 6 figures; matches published version
BGIPhageX_SHAPE
Creators: name: 邢博
Publisher: name: CNGB
Year: 2021
Subjects: Phenotype or Genotype
Synthetic
Other

description: Synthetic biology is emerging as a powerful approach for understanding life and developing therapeutics for diseases. Recent advances in synthetic biology have led to great demands for genetic manipulation. Trimming any process to simplify and accelerating streamlining of genetic code into life holds great promise in studying, mining, and engineering genomes. Here, we developed a simple yet powerful framework - steppingstone host assisted strategy to promote genome refactoring of virus, especially bacteriophages.
grafting increase watermelon seedling chilling tolerance
Creators: name: 鲁军阳(Lu Junyang)
Publisher: name: CNGB
Year: 2021
Subjects: Raw sequence reads
Transcriptome or Gene expression
Other
watermelon leaf
Agricultural

description: The experiment was carried out at Huazhong Agricultural University (Wuhan, China). The watermelon line ‘97103’ (Citrullus lanatus, a chilling-sensitive inbred line) was used as the scion and the pumpkin Qingyan No.1 (Cucurbita maxima × C. moschata, a chilling tolerant cultivar) was used as the rootstock. The watermelon seedlings were grafted by using the “hole insertion grafting” method(Lee et al., 2010). Two grafting combinations were used in this study: self-grafted watermelon plants (Cl/Cl) were used as controls and pumpkin-grafted watermelon plants (Cl/Cm). Grafted seedlings were grown in a growth chamber at 28°C/18°C (day/night), 12 h photoperiod, PPFD of 300 µmol•m−2•s−1, and a RH of 50%–70%. At the four-leaf stage, the grafted plants were used for subsequent experiments. Plants were exposed to 10°C/5°C (day/night) in a RH of 50%–70% (average 60%). At 12h after the chilling treatment, the third true levels (picked at third node from seedling bottom) were collected for RNA sequencing. Three biological replications were conducted for each treatment, and each replication contained 6 seedlings.
Mixed Effect Modeling and Variable Selection for Quantile Regression
Creators: name: Bar, Haim
name: Booth, James
name: Wells, Martin T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: It is known that the estimating equations for quantile regression (QR) can be solved using an EM algorithm in which the M-step is computed via weighted least squares, with weights computed at the E-step as the expectation of independent generalized inverse-Gaussian variables. This fact is exploited here to extend QR to allow for random effects in the linear predictor. Convergence of the algorithm in this setting is established by showing that it is a generalized alternating minimization (GAM) procedure. Another modification of the EM algorithm also allows us to adapt a recently proposed method for variable selection in mean regression models to the QR setting. Simulations show the resulting method significantly outperforms variable selection in QR models using the lasso penalty. Applications to real data include a frailty QR analysis of hospital stays, and variable selection for age at onset of lung cancer and for riboflavin production rate using high-dimensional gene expression arrays for prediction.
description: arXiv admin note: text overlap with arXiv:1910.11479
The rotation of very low-mass stars and brown dwarfs
Creators: name: Eisloeffel, Jochen
name: Scholz, Alexander
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The evolution of angular momentum is a key to our understanding of star formation and stellar evolution. The rotational evolution of solar-mass stars is mostly controlled by magnetic interaction with the circumstellar disc and angular momentum loss through stellar winds. Major differences in the internal structure of very low-mass stars and brown dwarfs -- they are believed to be fully convective throughout their lives, and thus should not operate a solar-type dynamo -- may lead to major differences in the rotation and activity of these objects. Here, we report on observational studies to understand the rotational evolution of the very low-mass stars and brown dwarfs.
description: 8 pages, 5 figures, Proceedings for IAU Symposium No. 243, 2007, 'Star-disk interaction in young stars'
A Discontinuity at the Lower Clouds of Venus to be considered by EnVision
Creators: name: Peralta, Javier
Publisher: name: Zenodo
Year: 2020

description: Thanks to observations by the Akatsuki orbiter and ground-based observations with NASA’s IRTF telescope, we report that the lower clouds of Venus follow a regular cycle clearly affected between 30°N and 40°S by a fast discontinuity that exhibits a westward rotation period of about 4.9 days, faster than winds at this level. This discontinuity can remain coherent during weeks altering the clouds’ properties along its path. A reanalysis of previous observations also reveals that, although previously unnoticed, this feature has been recurring since at least 1983. The results and conclusions of this work are of important relevance to future studies of the Venusian lower clouds and aerosols by VenSpec-M and VenSpec-H onboard ESA’s EnVision.
肾移植患者血浆供体来源游离DNA检测
Creators: name: 王仁定(Rending Wang)
Publisher: name: CNGB
Year: 2021
Subjects: Raw sequence reads
Monoisolate
Medical

description: 本项目对肾移植患者血浆供体来源游离DNA进行检测，明确供体来源游离DNA在肾移植术后移植物功能检测以及移植肾相关疾病中的诊断价值。
Cell free extrachromosomal circular DNA is common in human urine
Creators: name: 潘晓光(Pan Xiaoguang)
Publisher: name: CNGB
Year: 2021
Subjects: Raw sequence reads
Other
Human Urine
Medical

description: Cell free extrachromosomal circular DNA is evolving as a novel biomarker in liquid biopsies for disease diagnosis. However, presence and profile of eccDNA in human urine are largely unclear. An optimized next generation sequencing-based Circle-Seq method was developed to sequence urinary cell free eccDNA from 28 adult healthy volunteers. The genomic distributions and sequence compositions of ucf-eccDNAs were comprehensively characterized. Approximately ~1.2 million unique ucf-eccDNAs are identified, covering 14.9% of the human genome. Comprehensive characterization of ucf-eccDNAs show that ucf-eccDNAs contain higher GC content than flanking genomic regions. Most eccDNAs are less than 1000 bp and present four pronounced peaks at 203, 361, 550 and 728 bp, indicating the association between eccDNAs and the numbers of intact nucleosomes. Analysis of genomic distribution of ucf-eccDNAs indicate that certain genomic regions are more vulnerable to the formation of eccDNAs, such as CpG islands and genetic regions. Lastly, analysis of sequence motif signatures at eccDNA junction sites reveal that the presence of direct repeats is commonly found, indicating a role of DRs in eccDNA biogenesis. This work underscores the deep sequencing analysis of ucf-eccDNAs and provide a valuable reference resource for exploring potential application of ucf-eccDNA as diagnostic biomarkers of urogenital disorders in the future.
Information Resources in High-Energy Physics: Surveying the Present Landscape and Charting the Future Course
Creators: name: Gentil-Beccot, Anne
name: Mele, Salvatore
name: Holtkamp, Annette
name: O'Connell, Heath B.
name: Brooks, Travis C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: Access to previous results is of paramount importance in the scientific process. Recent progress in information management focuses on building e-infrastructures for the optimization of the research workflow, through both policy-driven and user-pulled dynamics. For decades, High-Energy Physics (HEP) has pioneered innovative solutions in the field of information management and dissemination. In light of a transforming information environment, it is important to assess the current usage of information resources by researchers and HEP provides a unique test-bed for this assessment. A survey of about 10% of practitioners in the field reveals usage trends and information needs. Community-based services, such as the pioneering arXiv and SPIRES systems, largely answer the need of the scientists, with a limited but increasing fraction of younger users relying on Google. Commercial services offered by publishers or database vendors are essentially unused in the field. The survey offers an insight into the most important features that users require to optimize their research workflow. These results inform the future evolution of information management in HEP and, as these researchers are traditionally ``early adopters'' of innovation in scholarly communication, can inspire developments of disciplinary repositories serving other communities.
description: Removed internal pdf links broken on some pdf viewers
Coherent control in the ground and optically excited state of an ensemble of erbium dopants
Creators: name: Fariña, Pablo Cova
name: Merkel, Benjamin
name: Valencia, Natalia Herrera
name: Yu, Penghong
name: Ulanowski, Alexander
name: Reiserer, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Ensembles of erbium dopants can realize quantum memories and frequency converters that operate in the minimal-loss wavelength band of fiber optical communication. Their operation requires the initialization, coherent control and readout of the electronic spin state. In this work, we use a split-ring microwave resonator to demonstrate such control in both the ground and optically excited state. The presented techniques can also be applied to other combinations of dopant and host, and may facilitate the development of new quantum memory protocols and sensing schemes.
description: arXiv admin note: text overlap with arXiv:2005.08822
The Association between Risk Genes and Alzheimer’s Disease
Creators: name: 沈璐(Lu Shen)
Publisher: name: CNGB
Year: 2021
Subjects: Variation
Monoisolate
Medical

description: We explored the association between variants of 33 AD risk genes and Alzheimer’s disease in 3604 individuals in the mainland Chinese population using next-generation sequencing. We identified that the common variants in APOE and ABCA7, as well as rare variants in ABCA7 and UNC5C, may contribute to the etiology of AD.