cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 8 of Methodological quality and reporting standards in systematic reviews with meta-analysis of physical activity studies: a report from the Strengthening the Evidence in Exercise Sciences Initiative (SEES Initiative)
Creators: name: Oliveira, Nórton Luís
name: Botton, Cíntia Ehlers
name: De Nardi, Angélica Trevisan
name: Umpierre, Daniel
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biotechnology
Science Policy
Cancer

description: Additional file 8: Table. Frequency distribution of items/recommended practices by domains for the Systematic Reviews with Meta-Analysis (SRMAs) with registration and without registration.
Mixing effectiveness depends on the source-sink structure: Simulation results
Creators: name: Okabe, Takahide
name: Eckhardt, Bruno
name: Thiffeault, Jean-Luc
name: Doering, Charles R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The mixing effectiveness, i.e., the enhancement of molecular diffusion, of a flow can be quantified in terms of the suppression of concentration variance of a passive scalar sustained by steady sources and sinks. The mixing enhancement defined this way is the ratio of the RMS fluctuations of the scalar mixed by molecular diffusion alone to the (statistically steady-state) RMS fluctuations of the scalar density in the presence of stirring. This measure of the effectiveness of the stirring is naturally related to the enhancement factor of the equivalent eddy diffusivity over molecular diffusion, and depends on the Peclet number. It was recently noted that the maximum possible mixing enhancement at a given Peclet number depends as well on the structure of the sources and sinks. That is, the mixing efficiency, the effective diffusivity, or the eddy diffusion of a flow generally depends on the sources and sinks of whatever is being stirred. Here we present the results of particle-based simulations quantitatively confirming the source-sink dependence of the mixing enhancement as a function of Peclet number for a model flow.
description: 13 pages, 9 figures, RevTex4 macros
Phytoplankton uptake by a resilient urban estuary bivalve, Mytilopsis leucophaeata
Creators: name: Kido, Allyson
name: Mansfield, Noah
name: Schott, Eric
Publisher: name: Maryland Shared Open Access Repository
Year: 2024

description: Urban estuaries face numerous problems stemming from excess nutrients from stormwater runoff. Baltimore Harbor, an urban estuary, has intense and frequent phytoplankton blooms that can lead to hypoxic and anoxic zones, and ultimately fish kills. Efforts to reduce the nutrients, that fuel algae blooms, focus on point sources and not remediation once the nutrients have entered the water. In water removal of nutrients is often in the form of phytoplankton uptake by bivalve suspension feeders. Commercial bivalve species have been studied for their ability to remove phytoplankton and sequester nutrients in the coastal zone. In urban estuaries, commercially important bivalves often do not naturally occur, or urban pollution would make them unsuitable for human consumption. Therefore, we set out to determine if a locally abundant non-commercial mussel, Mytilopsis leucophaeata , could reduce phytoplankton levels and how environmentally relevant temperature and salinity may impact clearance rates. Our study developed a standard method to quantify phytoplankton removal of two cultured phytoplankton species ( Isochrysis sp. and Chaetoceros sp. ), by measuring both in vivo and extracted chlorophyll. We then evaluated the ability of the mussels to remove algae under varied temperatures and salinity that are typical for Baltimore Harbor. Our results show that at lower temperatures there is a lower clearance rate, and salinity did not significantly affect the clearance rates of the mussels. Overall, our results show potential for the use of this native non-commercial bivalve to reduce phytoplankton blooms in Baltimore Harbor.
A Closed-Loop Multi-perspective Visual Servoing Approach with Reinforcement Learning
Creators: name: Zhang, Lei
name: Pei, Jiacheng
name: Bai, Kaixin
name: Chen, Zhaopeng
name: Zhang, Jianwei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Traditional visual servoing methods suffer from serving between scenes from multiple perspectives, which humans can complete with visual signals alone. In this paper, we investigated how multi-perspective visual servoing could be solved under robot-specific constraints, including self-collision, singularity problems. We presented a novel learning-based multi-perspective visual servoing framework, which iteratively estimates robot actions from latent space representations of visual states using reinforcement learning. Furthermore, our approaches were trained and validated in a Gazebo simulation environment with connection to OpenAI/Gym. Through simulation experiments, we showed that our method can successfully learn an optimal control policy given initial images from different perspectives, and it outperformed the Direct Visual Servoing algorithm with mean success rate of 97.0%.
description: 2023 IEEE International Conference on Robotics and Biomimetics (ROBIO)
Magnetic flux structuring of the quiet Sun internetwork. Center-to-limb analysis of solar-cycle variations
Creators: name: Faurobert, Marianne
name: Ricort, Gilbert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It is now well established that the quiet Sun contains in total more magnetic flux than active regions and represents an important reservoir of magnetic energy. But the nature and evolution of these fields remain largely unknown. We investigate the solar-cycle and center-to-limb variations of magnetic-flux structures at small scales in internetwork regions of the quiet Sun. We used Hinode SOT/SP data from the irradiance program between 2008 and 2016. Maps of the magnetic-flux density are derived from the center-of gravity method applied to the FeI 630.15 nm and FeI 630.25 nm lines. To correct the maps from the instrumental smearing, we applied a deconvolution method based on a principal component analysis of the line profiles and on a Richardson-Lucy deconvolution of their coefficients. We then performed a spectral analysis of the spatial fluctuations of the magnetic-flux density in 10'' x 10'' internetwork regions spanning a wide range of latitudes. At low and mid latitudes the power spectra do not vary significantly with the solar cycle. However at solar maximum for one scan in the activity belt showing an enhanced network, a marginal increase in the power of the magnetic fluctuations is observed at granular and larger scales in the internetwork. At high latitudes, we observe variations at granular and larger scales where the power decreases at solar maximum. At all the latitudes the power of the magnetic fluctuations at scales smaller than 0.5''remain constant throughout the solar cycle. Our results favor a small-scale dynamo that operates in the internetwork, but they show that the global dynamo also contributes to the internetwork fields.
Additional file 9 of Methodological quality and reporting standards in systematic reviews with meta-analysis of physical activity studies: a report from the Strengthening the Evidence in Exercise Sciences Initiative (SEES Initiative)
Creators: name: Oliveira, Nórton Luís
name: Botton, Cíntia Ehlers
name: De Nardi, Angélica Trevisan
name: Umpierre, Daniel
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biotechnology
Science Policy
Cancer

description: Additional file 9: Table. Frequency distribution of items/recommended practices by domains for the Systematic Reviews with Meta-Analysis (SRMAs) with open access and without open access.
Acoustic Metagrating Circulators: Nonreciprocal, Robust, and Tunable Manipulation with Unitary Efficiency
Creators: name: Fan, Lijuan
name: Mei, Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Nonreciprocal signal operation is highly desired for various acoustic applications, where protection from unwanted backscattering can be realized so that transmitting and receiving signals are processed in a full-duplex mode. Here we present the realization of a class of nonreciprocal circulators based on simply structured acoustic metagratings, which consist only of a few solid cylinders and a steady fluid flow with low velocity. These innovative metagratings are intelligently designed via a diffraction analysis of the linearized potential flow equation and a genetic-algorithm-based optimization process. Unitary reflection efficiency between desired ports of the circulators are demonstrated through full-wave numerical simulations, confirming nonreciprocal and robust circulation of the acoustic signal over a broad range of flow velocity magnitude and profile. Our design provides a feasible degree of tunability, including switching from reciprocal to nonreciprocal operation and reversing the handedness of the circulator, presenting a convenient but efficient approach for the realization of nonreciprocal acoustic devices from wavelength-thick metagratings. It may find applications in various scenarios including underwater communication, energy harvesting, and acoustic sensing.
Additional file 7 of Methodological quality and reporting standards in systematic reviews with meta-analysis of physical activity studies: a report from the Strengthening the Evidence in Exercise Sciences Initiative (SEES Initiative)
Creators: name: Oliveira, Nórton Luís
name: Botton, Cíntia Ehlers
name: De Nardi, Angélica Trevisan
name: Umpierre, Daniel
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biotechnology
Science Policy
Cancer

description: Additional file 7. List of the studies in descending order of adherence to the items/recommended practices.
Mass estimation in the outer non-equilibrium region of galaxy clusters
Creators: name: Cupani, Guido
name: Mezzetti, Marino
name: Mardirossian, Fabio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss a new criterion to estimate the mass in the outer, non-equilibrium region of galaxy clusters, where the galaxy dynamics is dominated by an overall infall motion towards the cluster centre. In the framework of the spherical infall model the local mean velocity of the infalling galaxies at every radius provides information about the integrated matter overdensity $δ$. Thus, a well-defined value of the overdensity $δ_t$ is expected at the turnaround radius $r_t$, i.e. the radius where the Hubble flow balances the infall motion. Within this scenario, we analysed the kinematical properties of a large catalogue of simulated clusters, using both dark matter particles and member galaxies as tracer of the infall motion. We also compared the simulation with analytical calculation performed in the spherical infall approximation, to analyze the dependence of the results on cosmology in spatially flat universe. If we normalize cluster mass profiles by means of the turnaround mass $M_t$ (i.e. the mass within $r_t$), they are consistent with an exponential profile in the whole non-equilibrium region ($0.5\la r/r_t\la 2$). Turnaround radii are proportional to virialization radii ($r_t\simeq 3.5 r_v$), while turnaround masses are proportional to virialization masses, i.e. $M_t\simeq 1.7 M_v$, where $M_v$ is the mass within $r_v$. Actually, the mass evaluated within the turnaround radius is a more exhaustive evaluation of the total mass of the cluster. These results can be applied to the analysis of observed clusters.
description: 10 pages, 7 figures, 3 tables, accepted for publication in MNRAS
Wiederkäuer besitzen keine Gene für die Methanbildung  in ihrem Genom
Creators: name: Brade, Wilfried
Publisher: name: Bundesministerium für Ernährung und Landwirtschaft
Year: 2019

description: Wiederkäuer besitzen in ihrem Genom keine Gene für die Methan (CH4)-Bildung. Die Gründe für eine regelmäßig zu beobachtende Zwischen-Tier-Variation in der CH4-Bildung werden bisher noch nicht vollständig verstanden. 
Eine Bewertung vorhandener Unterschiede zwischen den Tieren anhand von Daten, die tierindividuelle Unterschiede in der Anatomie des Magen-Darm-Traktes und/oder in der Verdauungsphysiologie widerspiegeln, könnten helfen, vorliegende Zusammenhänge zur Zwischen-Tier-Variation des CH4-Ertrages aufzuklären. So gibt es erste Beweise dafür, dass das individuelle Pansenvolumen und -struktur sowie die ruminale Passagerate der Digesta zur Variabilität der CH4-Produktion beitragen. 
Die Ursachen für die Zwischen-Tier-Varianz bezüglich der CH4-Bildung sind auch deshalb zu hinterfragen, um züchterische Fehlentscheidungen (= Etablierung einer einseitig-intensiven Selektion von Zuchttieren auf reduzierten CH4-Ertrag) zu vermeiden.
Schlüsselwörter: Verdaulichkeit, Passagerate, Varianzkomponente, flüchtige Fettsäure (VFA), (Futter-)Trockensubstanzaufnahme (TA), Methanertrag (g CH4/kg TA), neutrale Detergentienfaser (NDF)
description: Berichte über Landwirtschaft - Zeitschrift für Agrarpolitik und Landwirtschaft, Aktuelle Beiträge
Efficient quantum cryptography network without entanglement and quantum memory
Creators: name: Li, Chun-Yan
name: Li, Xi-Han
name: Deng, Fu-Guo
name: Zhou, Ping
name: Liang, Yu-Jie
name: Zhou, Hong-Yu
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An efficient quantum cryptography network protocol is proposed with d-dimension polarized photons, without resorting to entanglement and quantum memory. A server on the network, say Alice, provides the service for preparing and measuring single photons whose initial state are |0>. The users code the information on the single photons with some unitary operations. For preventing the untrustworthy server Alice from eavesdropping the quantum lines, a nonorthogonal-coding technique (decoy-photon technique) is used in the process that the quantum signal is transmitted between the users. This protocol does not require the servers and the users to store the quantum state and almost all of the single photons can be used for carrying the information, which makes it more convenient for application than others with present technology. We also discuss the case with a faint laser pulse.
description: 4 pages, 1 figures. It also presented a way for preparing decoy photons without a sinigle-photon source
The budget, the President and the 97th Congress
Creators: name: Berlin, Peter
Publisher: name: University of British Columbia
Year: 2010

description: This thesis looks at House budgetary actions in the 97th Congress in 1981 and 1982. In 1981, despite the opposition of the economic committees and the Democratic majority leadership, the House voted through a budget drawn up by the White House. In 1982, however, they refused to pass a budget drawn to President Reagan's blueprint. The first chapter is a narrative of the events of those two years. The second chapter is an account of the theoretical literature on the subject which pose several questions about those events and also suggest some answers. The third chapter is a statistical analysis of nine House roll calls over the two years. It attempts, first, to identify those Representatives who made the difference between Presidential victory in 1981 and frustration in 1982. Second, it tries to explain what these marginal presidential supporters had in common and what made them switch sides.
Compositional Generalization in Spoken Language Understanding
Creators: name: Ray, Avik
name: Shen, Yilin
name: Jin, Hongxia
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: State-of-the-art spoken language understanding (SLU) models have shown tremendous success in benchmark SLU datasets, yet they still fail in many practical scenario due to the lack of model compositionality when trained on limited training data. In this paper, we study two types of compositionality: (a) novel slot combination, and (b) length generalization. We first conduct in-depth analysis, and find that state-of-the-art SLU models often learn spurious slot correlations during training, which leads to poor performance in both compositional cases. To mitigate these limitations, we create the first compositional splits of benchmark SLU datasets and we propose the first compositional SLU model, including compositional loss and paired training that tackle each compositional case respectively. On both benchmark and compositional splits in ATIS and SNIPS, we show that our compositional SLU model significantly outperforms (up to $5\%$ F1 score) state-of-the-art BERT SLU model.
description: Published in INTERSPEECH 2023
Closed 1-forms in topology and dynamics
Creators: name: Farber, Michael
name: Schuetz, Dirk
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Topology (math.AT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 58E05; 55N25, 55U99

description: This article surveys recent progress of results in topology and dynamics based on techniques of closed one-forms. Our approach allows us to draw conclusions about properties of flows by studying homotopical and cohomological features of manifolds. More specifically we describe a Lusternik - Schnirelmann type theory for closed one-forms, the focusing effect for flows and the theory of Lyapunov one-forms. We also discuss recent results about cohomological treatment of the invariants cat(X, ξ) and cat^1(X, ξ) and their explicit computation in certain examples.
description: 65 pages, 12 figures
Janus solutions from dyonic ISO(7) maximal gauged supergravity
Creators: name: Karndumri, Parinya
name: Maneerat, Chawakorn
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We give a large class of new supersymmetric Janus solutions in dyonic $ISO(7)$ maximal gauged supergravity encompassing all known solutions appearing recently. We consider $SO(3)$ invariant sector in which the gauged supergravity admits four supersymmetric $AdS_4$ vacua with $N=1,1,2,3$ unbroken supersymmetries and $G_2$, $SU(3)$, $SU(3)\times U(1)$ and $SO(4)$ symmetries, respectively. We find Janus solutions preserving $N=1,2,3$ supersymmetries and interpolating between $AdS_4$ vacua and the $N=8$ SYM phase. These solutions can be interpreted as conformal interfaces between SYM and various conformal phases of the dual field theory in three dimensions. The solutions can also be embedded in massive type IIA theory by a consistent truncation on $S^6$. We also find a number of singular Janus solutions interpolating between $N=8$ SYM or $AdS_4$ vacua and singularities or between singular geometries. It turns out that, apart from the SYM phase on D2-branes, all the singularities arising in these solutions are unphysical in both four- and ten-dimensional frameworks.
description: 43 pages, 25 figures, a reference added, typos corrected and more solutions added
Study of K^0 \to pi^- e^+ nu_e e^+ e^- in chiral perturbation theory
Creators: name: Tsuji, K.
name: Sato, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: K^0 \to pi^- e^+ nu_e e^+ e^- decay is studied up to the next-to-leading order O^4 in chiral perturbation theory. It is found that the O^4 terms appreciably modifiy the shape of the invariant mass distribution of the leptons and the energy spectrum of the neutrino.
description: 17 pages, 7 figures, figures and formula are added
title: D8.2 Land indicators and models report.
title: Development and supply chain guidelines using multi-criteria logistical assessment
titleType: Subtitle
Creators: name: Evenor-Tech
Publisher: name: SteamBioAfrica
Year: 2024
Subjects: subject: Earth and related environmental sciences
subject: FOS: Earth and related environmental sciences

description: This report presents the findings of a study that explored the distribution of encroacher bush species, the impacts of land use change, and the mapping of soil organic carbon (SOC) in southern Africa during the activities carried out in Task 8.2. The study employed advanced data analysis and modelling techniques to identify critical areas for intervention and develop adaptive management strategies.Effective environmental management requires a deep understanding of the interactions between species, land use, and soil health. In southern Africa, the expansion of encroacher bush and invasive alien species along with land use changes pose significant challenges to environmental sustainability. SOC, an essential ecosystem component, is closely linked to soil productivity and climate change mitigation.The study collected data from diverse sources, including satellite imagery, field measurements, and climate data. This data was used to develop models of encroacher bush and alien species distribution, assess the impact of land use change on SOC, and map the spatial distribution of SOC across the region.The study findings revealed complex patterns in the distribution of encroacher bush and alien species, influenced by climatic factors, resource competition, and landscape characteristics. Land use change had a significant impact on SOC, with forest conversion to cropland resulting in a substantial decline in SOC levels. The generated SOC maps provided valuable insights into the spatial distribution of this critical resource.The findings of this study have significant implications for environmental management in southern Africa. Identifying areas at high risk of bush encroachment and understanding the impact of land use change on SOC are essential for developing effective management strategies. The generated SOC maps can be used to guide soil restoration and carbon sequestration initiatives.This study demonstrates the value of advanced data analysis and modeling techniques for addressing complex environmental challenges. The results provide valuable information for environmental management in southern Africa, contributing to biodiversity conservation, soil restoration, and climate change mitigation.However, additional data and improvement on accuracy of the bush distribution models should be required at local level.As well as an assessment on the impact of different soil management practices on SOC and soil productivity could be interesting to define specific strategies in the three countries. Finally, an integrated management strategy should be developed to address bush encroachment, land use change, and soil degradation.
Warped Leptogenesis with Dirac Neutrino Masses
Creators: name: Gherghetta, Tony
name: Kadota, Kenji
name: Yamaguchi, Masahide
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show how leptogenesis can occur at the TeV scale with neutrinos that possess almost purely Dirac masses and negligible Majorana mass contributions as a consequence of the small wavefunction overlap in a warped fifth dimension. Lepton number violation at the Planck scale is introduced via a Majorana mass term on the Planck brane. Such a Majorana mass operator leads to the small mass splitting of otherwise degenerate Kaluza-Klein excited states on the TeV brane. This tiny mass splitting can compensate for the small Yukawa couplings to give a CP asymmetry large enough to produce the sufficient baryon asymmetry from the decay of the nearly degenerate neutrino Kaluza-Klein states. In this way the standard baryogenesis via leptogenesis scenario can naturally occur at the TeV scale without the need for a high mass scale.
description: Typos corrected
Evidence of energy-, recombination-, and photon-limited escape regimes in giant planet H/He atmospheres
Creators: name: Lampón, M.
name: López-Puertas, M.
name: Czesla, S.
name: Sánchez-López, A.
name: Lara, L. M.
name: Salz, M.
name: Sanz-Forcada, J.
name: Molaverdikhani, K.
name: Quirrenbach, A.
name: Pallé, E.
name: Caballero, J. A.
name: Henning, Th.
name: Nortmann, L.
name: Amado, P. J.
name: Montes, D.
name: Reiners, A.
name: Ribas, I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Hydrodynamic escape is the most efficient atmospheric mechanism of planetary mass loss and has a large impact on planetary evolution. Three hydrodynamic escape regimes have been identified theoretically: energy-limited, recombination-limited, and photon-limited. However, no evidence of these regimes had been reported until now. Here, we report evidence of these three regimes via an analysis of helium I triplet at 10830 angstroms and Ly-$α$ absorption involving a 1D hydrodynamic model that allows us to estimate hydrogen recombination and advection rates. In particular, we show that HD 209458 b is in the energy-limited regime, HD 189733 b is in the recombination-limited regime, and GJ 3470 b is in the photon-limited regime. These exoplanets can be considered as benchmark cases for their respective regimes.
description: Accepted to A&A. 9 Pages
Cloud coverage and sky brightness at La Silla
Creators: name: Ortolani, Sergio
name: Saviane, Ivo
name: Cavazzani, Stefano
Publisher: name: Zenodo
Year: 2019

description: Statistical properties of night time cloud coverage at La Silla in the last decades are presented. Recent sky brightness measurements are compared to other observatories. These data can be used as sensitive tracer of clouds.
Materiali e Tecnologie per la realizzazione di sostituti ossei per l'ingegneria dei tessuti
Creators: name: Guarino, Vincenzo
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Scaffolds play a critical role in tissue engineering by acting as a temporary artificial extracellular matrices for cell adhesion, proliferation and differentiated function as well as serving as three dimensional templates for neotissue/organ formation. This thesis have been addressed to the examination of the basic principles and methods oriented to the development of tailored scaffolds for bone tissue regeneration. In this direction, different polycaprolactone based composite scaffolds have been developed through novel and traditional techniques of preparation such as phase inversion/salt leaching, thermal induced phase separation (TIPS) and melting induced microspheres sintering (MIMS)).  In order to mimic the mechanical response of the natural bone tissue, different strategies of reinforcement have been adopted by the addition of bioactive fillers (Hydroxyapatite, tricalcium phosphates) or/and biodegradable fibers (polylactide acid). An accurate  morphological and functional characterization of proposed scaffolds has been achieved. A qualitative estimation of porosity has been obtained by S.E.M analysis whereas a qualitative analysis of porosity in terms of pore volume fraction, pore size distribution and interconnection degree has been performed by theoretical and experimental methodologies (gravimetric measurements, mercury intrusion porosimetry, two dimensional analysis by dedicated software and three dimensional image analysis by computed micro tomography). Furthermore, a mechanical characterization was also performed to compare their properties with the natural ones.
GRBs and the thermalization process of electron-positron plasmas
Creators: name: Aksenov, Alexey G.
name: Bianco, Carlo Luciano
name: Ruffini, Remo
name: Vereshchagin, Gregory V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the temporal evolution of the pair plasma created in Gamma-Ray Burst sources. A particular attention is paid to the relaxation of the plasma into thermal equilibrium. We also discuss the connection between the dynamics of expansion and the spatial geometry of the plasma. The role of the baryonic loading parameter is emphasized.
description: 4 pages, 3 figures, in the Proceedings of the "Gamma Ray Bursts 2007" meeting, November 5-9, 2007, Santa Fe, New Mexico, USA
Supersymmetric domain walls in maximal 6D gauged supergravity II
Creators: name: Karndumri, Parinya
name: Nuchino, Patharadanai
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We continue the study of supersymmetric domain wall solutions in six-dimensional maximal gauged supergravity. We first give a classification of viable gauge groups with the embedding tensor in $\mathbf{5}^{+7}$, $\bar{\mathbf{5}}^{+3}$, $\mathbf{10}^{-1}$, $\mathbf{24}^{-5}$, and $\overline{\mathbf{45}}^{+3}$ representations of the off-shell symmetry $GL(5)\subset SO(5,5)$. We determine an explicit form of the embedding tensor for gauge groups arising from each representation together with some examples of possible combinations among them. All of the resulting gauge groups are of a non-semisimple type with abelian factors and translational groups of different dimensions. We find $\frac{1}{2}$- and $\frac{1}{4}$-supersymmetric domain walls with $SO(2)$ symmetry in $SO(2)\ltimes \mathbb{R}^8$ and $SO(2)\ltimes \mathbb{R}^6$ gauge groups from the embedding tensor in $\mathbf{24}^{-5}$ representation and in $CSO(2,0,2)\ltimes \mathbb{R}^4$, $CSO(2,0,2)\ltimes \mathbb{R}^2$, and $CSO(2,0,1)\ltimes \mathbb{R}^4$ gauge groups with the embedding tensor in $\overline{\mathbf{45}}^{+3}$ representations. These gauge groups are parametrized by a traceless matrix and electrically and magnetically embedded in $SO(5,5)$ global symmetry, respectively.
description: 44 pages, no figure, a sequel of arXiv: 2102.11185, typos corrected
NNLO corrections to 3-jet observables in electron-positron annihilation
Creators: name: Weinzierl, Stefan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I report on a numerical program, which can be used to calculate any infrared safe three-jet observable in electron-positron annihilation to next-to-next-to-leading order in the strong coupling constant alpha_s. The results are compared to a recent calculation by another group. Numerical differences in three colour factors are discussed and explained.
description: 6 pages, minor changes
Regolazione della biosintesi delle fenazine in una pseudomonadi fluorescente, Pseudomonas aureofaciens 30-84
Creators: name: Puopolo, Gerardo
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Gli pseudomonadi  fluorescenti, che colonizzano la rizosfera di molte piante coltivate, sono dei potenziali farmaci biologici in quanto capaci di proteggere le colture dall’attacco di microrganismi patogeni e quindi di aumentarne le loro rese produttive. Nel corso del lavoro, diiversi ceppi batterici afferenti al genere Pseudomonass sono stati oggetti ad analisi incentrate alla potenziale applicazione di tali microrganismi nel controllo biologico di fitopatie fungine. Gli isolati batterici sono stati identificati mediante metodi biochimici (Biolog Test e API 20NE) e molecolari (16S PCR-RFLP) e sono stati anche saggiati come potenziali antagonisti di diversi patogeni fungini e batterici. La capacità di produzione di metaboliti secondari è stata saggiata nei ceppi che esibivano una particolare attività antagonista in vitro. Meccanismi molecolari, quale il “Quorum Sensing”, preposti all’esplicazione delle attività di biocontrollo sono stati studiati nell’organismo modello Pseudomonas aureofaciens ceppo 30-84, interessandosi in particolar modo alla caratterizzazione della funzionalità del promotore dell’operone delle fenazine ed, inoltre, all’identificazione del ruolo svolto dal fattore trascrizionale PsrA nella regolazione della produzione di metabolici secondari.
Deep Graph Convolutional Reinforcement Learning for Financial Portfolio Management -- DeepPocket
Creators: name: Soleymani, Farzan
name: Paquet, Eric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Finance (q-fin.CP)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Machine Learning (cs.LG)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Portfolio management aims at maximizing the return on investment while minimizing risk by continuously reallocating the assets forming the portfolio. These assets are not independent but correlated during a short time period. A graph convolutional reinforcement learning framework called DeepPocket is proposed whose objective is to exploit the time-varying interrelations between financial instruments. These interrelations are represented by a graph whose nodes correspond to the financial instruments while the edges correspond to a pair-wise correlation function in between assets. DeepPocket consists of a restricted, stacked autoencoder for feature extraction, a convolutional network to collect underlying local information shared among financial instruments, and an actor-critic reinforcement learning agent. The actor-critic structure contains two convolutional networks in which the actor learns and enforces an investment policy which is, in turn, evaluated by the critic in order to determine the best course of action by constantly reallocating the various portfolio assets to optimize the expected return on investment. The agent is initially trained offline with online stochastic batching on historical data. As new data become available, it is trained online with a passive concept drift approach to handle unexpected changes in their distributions. DeepPocket is evaluated against five real-life datasets over three distinct investment periods, including during the Covid-19 crisis, and clearly outperformed market indexes.
Additional file 1 of Functional enrichment of alternative splicing events with NEASE reveals insights into tissue identity and diseases
Creators: name: Louadi, Zakaria
name: Elkjaer, Maria L.
name: Klug, Melissa
name: Lio, Chit Tong
name: Fenn, Amit
name: Illes, Zsolt
name: Bongiovanni, Dario
name: Baumbach, Jan
name: Kacprowski, Tim
name: List, Markus
name: Tsoy, Olga
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Tables S1-S3. Table S1. Enrichment of the pathway “Muscle contraction” from Reactome for the exons upregulated in the muscles generated by the NEASE package. Table S2. Enrichment of the pathway “Synaptic vesicle cycle” from KEGG for the exons upregulated in the neural tissues generated by the NEASE package. Table S3. RNA-Seq samples used in the study. Figs. S1-S6. Fig. S1. Node degree distribution of the classic PPI and structurally annotated PPI, the latter contains only interactions with evidence from DDIs and DMIs or residue-level evidence from the co-resolved structure. Fig S2. Network Enrichment Analysis using EviNet webtool for exons upregulated in muscles and neural tissues. Fig. S3. NEASE visualization highlights the interactions of differentially spliced genes with the DCM pathway. Fig. S4. The PSI values of two exon skipping events in the genes TPM1 and DST from the GTEx dataset confirm that both the exons are upregulated in muscles and heart tissues. Fig. S5. The PSI values of two exon skipping events in the genes CLTA and CLTB from the GTEx dataset confirm that both the exons are upregulated in neural tissues. Fig. S6. Pseudocode of NEASE algorithm.
Recent photometry of symbiotic stars - XII
Creators: name: Skopal, A.
name: Vanko, M.
name: Pribulla, T.
name: Chochol, D.
name: Semkov, E.
name: Wolf, M.
name: Jones, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new photometric observations of 15 symbiotic stars (EG And, Z And, AE Ara, BF Cyg, CH Cyg, CI Cyg, V1329 Cyg, TX CVn, AG Dra, Draco C-1, RW Hya, SY Mus, AR Pav, AG Peg, AX Per) covering their last orbital cycle(s) from 2003.9 to 2007.2. We obtained our data by both classical photoelectric and CCD photometry. Main results are: EG And brightened by about 0.3 mag in U from 2003. A 0.5 mag deep primary minimum developed in the U light curve (LC) at the end of 2006. Z And continues its recent activity that began during the 2000 autumn. A new small outburst started in summer of 2004 with the peak U-magnitude of about 9.2. During the spring of 2006 the star entered a massive outburst. It reached its historical maximum at U = 8.0 in 2006 July. AE Ara erupted in 2006 February with Dm(vis) approx. 1.2 mag. BF Cyg entered a new active stage in 2006 August. A brightness maximum (U approx. 9.4) was measured during 2006 September. CH Cyg persists in a quiescent phase. During 2006 June - December about 2 mag decline in all colours was measured. CI Cyg started a new active phase during 2006 May - June. After 31 years it erupted by about 2 mag in U. TX CVn maintains a bright stage with U approx. 10.5 from 2003. AG Dra entered a new major outburst in 2006 June. It reached its maximum at U = 8.0 in 2006 September. AR Pav persists at a low level of the activity. AG Peg's LC profile varies markedly during different orbital cycles. AX Per continues its quiescent phase.
description: 4 pages text, 12 figures, 18 tables, accepted for publication in Astron. Nachrichten
Thermalisation Dynamics and Spectral Statistics of Extended Systems with Thermalising Boundaries
Creators: name: Kos, Pavel
name: Prosen, Tomaz
name: Bertini, Bruno
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study thermalisation and spectral properties of extended systems connected, through their boundaries, to a thermalising Markovian bath. Specifically, we consider periodically driven systems modelled by brickwork quantum circuits where a finite section (block) of the circuit is constituted by arbitrary local unitary gates while its complement, which plays the role of the bath, is dual-unitary. We show that the evolution of local observables and the spectral form factor are determined by the same quantum channel, which we use to characterise the system's dynamics and spectral properties. In particular, we identify a family of fine-tuned quantum circuits -- which we call strongly non-ergodic -- that fails to thermalise even in this controlled setting, and, accordingly, their spectral form factor does not follow the random matrix theory prediction. We provide a set of necessary conditions on the local quantum gates that lead to strong non-ergodicity, and in the case of qubits, we provide a complete classification of strongly non-ergodic circuits. We also study the opposite extreme case of circuits that are almost dual-unitary, i.e., where thermalisation occurs with the fastest possible rate. We show that, in these systems, local observables and spectral form factor approach respectively thermal values and random matrix theory prediction exponentially fast. We provide a perturbative characterisation of the dynamics and, in particular, of the time-scale for thermalisation.
description: 17 pages, 8 figures, 1 table; v2 18 pages, 8 figures, 1 table, improved exposition
LAMOST J040901.83+329355.6 -- a new Galactic star with Wolf--Rayet characteristics on a post-AGB to CSPN transitional stage
Creators: name: Maryeva, Olga
name: Abdulkarimova, Aynur
name: Karpov, Sergey
name: Moiseev, Alexei
name: Oparin, Dmitry
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The similarity in physical conditions in winds of low-mass post-asymptotic giant branch stars and evolved massive stars leads to the appearance of an interesting phenomenon of spectral mimicry. Due to that the discovery of every new star with Wolf--Rayet spectrum requires special study of its evolutionary status before it may be included in the list of Galactic Wolf--Rayet (WR) stars. A couple of years ago LAMOST J040901.83+323955.6 (hereafter J0409+3239) was selected as a WR star in LAMOST spectroscopic database by machine learning methods. In this work we investigated its evolutionary status. Analyzing the spatial location of J0409+3239, in the Galaxy and its position in the color-magnitude diagram we concluded what J0409+3239, is instead a low mass object with WR phenomenon. Its luminosity is $L*=1000 L_\odot$ and effective temperature $T_{\rm eff}$=40,000 K. Using new and archival photometric data we detected irregular variability on time scales from hours to tens of days with amplitude up to $\approx0.2$ mag. Comparison of the spectrum obtained in 2022 with the one from 2014 also shows an evidence of spectral variability. The absence of clearly detected circumstellar nebula does not allow to classify J0409+3239, as [WR], i.e. a central star of planetary nebula (CSPN). However, its position in Hertzsprung--Russell diagram suggests that J0409+3239, is a low mass star caught in rare transitional phase to CSPN. Estimation of J0409+3239, mass based on evolutionary tracks shows that it is less than $0.9~M_\odot$, and thus the age of the Galaxy is barely enough for the star to evolve to its current stage.
description: 10 pages, 5 figures, 3 tables, accepted for publication in MNRAS
Delta Self-Consistent Field as a method to obtain potential energy surfaces of excited molecules on surfaces
Creators: name: Gavnholt, Jeppe
name: Olsen, Thomas
name: Engelund, Mads
name: Schiøtz, Jakob
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present a modification of the $Δ$SCF method of calculating energies of excited states, in order to make it applicable to resonance calculations of molecules adsorbed on metal surfaces, where the molecular orbitals are highly hybridized. The $Δ$SCF approximation is a density functional method closely resembling standard density functional theory (DFT), the only difference being that in $Δ$SCF one or more electrons are placed in higher lying Kohn-Sham orbitals, instead of placing all electrons in the lowest possible orbitals as one does when calculating the ground state energy within standard DFT. We extend the $Δ$SCF method by allowing excited electrons to occupy orbitals which are linear combinations of Kohn-Sham orbitals. With this extra freedom it is possible to place charge locally on adsorbed molecules in the calculations, such that resonance energies can be estimated. The method is applied to N$_2$, CO and NO adsorbed on different metallic surfaces and compared to ordinary $Δ$SCF without our modification, spatially constrained DFT and inverse-photoemission spectroscopy (IPES) measurements. This comparison shows that the modified $Δ$SCF method gives results in close agreement with experiment, significantly closer than the comparable methods. For N$_2$ adsorbed on ruthenium (0001) we map out a 2-dimensional part of the potential energy surfaces in the ground state and the 2$π$-resonance. Finally we compare the $Δ$SCF approach on gas-phase N$_2$ and CO, to higher accuracy methods. Excitation energies are approximated with accuracy close to that of time-dependent density functional theory, and we see very good agreement in the minimum shift of the potential energy surfaces in the excited state compared to the ground state.
description: 11 pages, 7 figures
Measurement of Dust Optical Properties in Coalsack
Creators: name: Sujatha, N. V.
name: Murthy, Jayant
name: Shalima, P.
name: Henry, Richard Conn
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used FUSE and Voyager observations of dust scattered starlight in the neighborhood of the Coalsack Nebula to derive the optical constants of the dust grains. The albedo is consistent with a value of $0.28 \pm 0.04$ and the phase function asymmetry factor with a value of $0.61 \pm 0.07$ throughout the spectral range from 900 -- 1200 Å, in agreement with previous determinations as well as theoretical predictions. We have now observed two regions (Ophiuchus and Coalsack) with intense diffuse background radiation and in both cases have found that the emission is due to light from nearby hot stars scattered by a relatively thin foreground cloud, with negligible contribution from the background molecular cloud.
description: Total 19 pages, Figures 9, Accepted for publication in Astrophysical Journal
Tangent Bundles with Sasaki Metric and Almost Hypercomplex Pseudo-Hermitian Structure
Creators: name: Manev, Mancho
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 55R10, 53C15, 32Q60, 53C26, 53C50, 53C55

description: The tangent bundle as a $4n$-manifold is equipped with an almost hypercomplex pseudo-Hermitian structure and it is characterized with respect to the relevant classifications. A number of 8-dimensional examples of the considered type of manifold are received from the known explicit examples in that manner.
description: 10 pages
Algorithm FIRE -- Feynman Integral REduction
Creators: name: Smirnov, A. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The recently developed algorithm FIRE performs the reduction of Feynman integrals to master integrals. It is based on a number of strategies, such as applying the Laporta algorithm, the s-bases algorithm, region-bases and integrating explicitly over loop momenta when possible. Currently it is being used in complicated three-loop calculations.
description: Comparison with AIR updated
Dissipation-enabled resonant adiabatic quantum state transfer: Entanglement generation and quantum cloning
Creators: name: Gajewski, Marvin
name: Haase, Thorsten
name: Alber, Gernot
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Resonant dissipation-enabled adiabatic quantum state transfer processes between the polarization degrees of freedom of a single photon wave packet and quantum emitters are discussed. These investigations generalize previous work [N. Trautmann and G. Alber, Phys. Rev. A 93, 053807 (2015)] by taking into account the properties of the spontaneously emitted photon wave packet and of non adiabatic corrections. It is demonstrated that the photonic degrees of freedoms of these adiabatic one-photon quantum state transfer processes can be used for the passive, heralded and deterministic preparation of Bell states of two material quantum emitters and for realizing a large family of symmetric and asymmetric quantum cloning processes. Although these theoretical investigations concentrate on waveguide scenarios they are expected to be relevant also for other scenarios as long as the processes involved are adiabatic so that the Fourier-limited bandwidth of the single photon wave packet involved is small in comparison with the relevant dissipative rates.
description: final version. 17 pages, 5 figures