cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Entanglement Entropy Near Cosmological Singularities
Creators: name: Engelhardt, Netta
name: Horowitz, Gary T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the behavior of the entanglement entropy of a confining gauge theory near cosmological singularities using gauge/gravity duality. As expected, the coefficients of the UV divergent terms are given by simple geometric properties of the entangling surface in the time-dependent background. The finite (universal) part of the entanglement entropy either grows without bound or remains bounded depending on the nature of the singularity and entangling region. We also discuss a confinement/deconfinement phase transition as signaled by the entanglement entropy.
description: 16 pages, 5 figures, v2: typo corrected
METABOLOME-MICROBIOME INTERRELATIONSHIPS IN THE PATHOPHYSIOLOGY OF SUCCINIC SEMIALDEHYDE DEHYDROGENASE DEFICIENCY, A DEFECT OF GABA METABOLISM
Creators: name: Kirby, Trevor Owen
Publisher: name: Washington State University
Year: 2022
Subjects: Gut Microbiome
Gut-Brain Axis
Inborn Errors of Metabolism
Microbial Metabolism
Medicine

description: Succinic semialdehyde dehydrogenase deficiency (SSADHD) is a rare, autosomal recessive, inherited disorder of γ-aminobutyric acid (GABA) metabolism. Individuals with this disorder manifest a neurological phenotype that includes global developmental delay, ataxia, hypotonia, neuropsychological morbidity (obsessive-compulsive disorder, attention deficit hyperactivity disorder), and epilepsy. Symptomatology associates with extensive metabolic dysregulation of GABA and GABA-related metabolic pathways in all the tissues and biological fluids of patients. Metabolic dysfunction and disease presentation were postulated to act synergistically to induce intestinal dysbiosis. This hypothesis was tested by conducting an extensive and unique characterization of metabolic dysfunction in post-mortem human brain tissue, analyzing the SSADHD metabolome in dried bloodspots obtained from patients and healthy individuals, and characterizing the SSADHD intestinal microbiome using stool samples collected from patients enrolled in an ongoing natural history study. These human studies were guided by the results of preceding work showing significant intestinal dysbiosis in a mouse model of the disease (aldh5a1-/-). Collectively, results demonstrate a significant impact of SSADHD on the intestinal microbiota and suggest that intestinal dysbiosis may be related to metabolic markers of the disease in tissues and biological fluids. Additional studies of the intestinal microbiome in humans and animals further aided in a more robust analysis of metabolome-microbiome interrelationships in SSADHD. This work significantly expands the understanding of the gut microbiota-disease relationship in various disease conditions.
Computably Categorical Fields via Fermat's Last Theorem
Creators: name: Miller, Russell
name: Schoutens, Hans
Publisher: name: arXiv
Year: 2012
Subjects: subject: Logic (math.LO)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 03C57 (Primary), 03D45, 12L05 (Secondary)

description: We construct a computable, computably categorical field of infinite transcendence degree over the rational numbers, using the Fermat polynomials and assorted results from algebraic geometry. We also show that this field has an intrinsically computable (infinite) transcendence basis.
description: to appear in the journal Computability
Anisotropic shear melting and recrystallization of a two-dimensional complex (dusty) plasma
Creators: name: Nosenko, V.
name: Ivlev, A. V.
name: Morfill, G. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A two-dimensional plasma crystal was melted by suddenly applying localized shear stress. A stripe of particles in the crystal was pushed by the radiation pressure force of a laser beam. We found that the response of the plasma crystal to stress and the eventual shear melting depended strongly on the crystal's angular orientation relative to the laser beam. Shear stress and strain rate were measured, from which the spatially resolved shear viscosity was calculated. The latter was shown to have minima in the regions with high velocity shear, thus demonstrating shear thinning. Shear-induced reordering was observed in the steady-state flow, where particles formed strings aligned in the flow direction.
description: 7 pages, 8 figures, submitted to Physical Review E
ASSESSMENT OF REFUGE GENERATION AND DISPOSAL PRACTICES AT NNAMDI AZIKIWE INTERNATIONAL AIRPORT
Creators: name: Aisha, S. Abdullahi
name: Fatima, R. Kachalla
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Generation, Storage, Disposal, Health Effects of Refuse, Airport.

description:  The study examined the storage, disposal and health effects of refuse in Nnamdi Azikiwe International Airport Abuja. The specific objectives were to; assess the types of Refuse generated; examine the methods of storing refuse; and find out the health effects of improper refuse disposal based on gender. Cross sectional descriptive survey research design was used. The population of the study comprises of all 1, 574 workers in the airport. The sample size of this study is 383 determined using of Cohen, Manion and Morrison (2011). Simple random sampling by balloting was used to select the respondents. Questionnaire was used to collect data which validated by three (3) experts and the Cronbach alpha was 0.78. Both descriptive and inferential statistical tools were used and analyzed the collected data. For descriptive statistics, frequency, percentage, mean, and standard deviation were used. For inferential statistics, chi – square was used and set the significant level at (5%) (p ≤ 0.05). All the results were presented in tables and calculated with aid of Statistical Package for Social Science (SPSS). The finding indicates that more than half (68.9%) of the respondents are generating accumulated rags waste, (64.3%) generating Nylon and polythene bags waste, and (57.5%) generating waste papers while (44.1%) are generating food waste and fruits peel. Finding also shows that garbage bags (mean = 3.10), polythene bags (mean = 3.03) and, drums (mean = 2.74) were the methods of refuse storage recorded the higher mean value greater than the criterion mean (2.50) which concluded as agreed. Finally, it also revealed that Female (89.2%) are more than male (81.2%) agreed toxic is one of the health effects; also (91.4%) highly agreed then male (71.3%) for contamination of land, air and water, but for  creation of unsanitary conditions effect, female (88.7%) highly agreed than male (71.8%); in environmental pollution; female (86.0%) agreed than male (70.7%); female (81.7%) highly agreed than male (69.1%) that outbreaks of vector-borne disease is one of the health effects of improper refuse disposal. It was recommended that; Health campaign on better waste disposal methods and educating the both passengers and staff of the airport in order to appreciate the health problems associated with indiscriminate waste disposal and the enforcement of sanitation laws by the appropriate authorities.
Lower Bounds for the Area of Black Holes in Terms of Mass, Charge, and Angular Momentum
Creators: name: Dain, Sergio
name: Khuri, Marcus
name: Weinstein, Gilbert
name: Yamada, Sumio
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The most general formulation of Penrose's inequality yields a lower bound for ADM mass in terms of the area, charge, and angular momentum of black holes. This inequality is in turn equivalent to an upper and lower bound for the area in terms of the remaining quantities. In this note, we establish the lower bound for a single black hole in the setting of axisymmetric maximal initial data sets for the Einstein-Maxwell equations, when the non-electromagnetic matter fields are not charged and satisfy the dominant energy condition. It is shown that the inequality is saturated if and only if the initial data arise from the extreme Kerr-Newman spacetime. Further refinements are given when either charge or angular momentum vanish. Lastly, we discuss the validity of the lower bound in the presence of multiple black holes.
description: 12 pages; section 2 revised; to appear in Phys. Rev. D
Kaehler groups, quasi-projective groups, and 3-manifold groups
Creators: name: Friedl, Stefan
name: Suciu, Alexander
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove two results relating 3-manifold groups to fundamental groups occurring in complex geometry. Let N be a compact, connected, orientable 3-manifold. If N has non-empty, toroidal boundary, and π_1(N) is a Kaehler group, then N is the product of a torus with an interval. On the other hand, if N has either empty or toroidal boundary, and π_1(N) is a quasi-projective group, then all the prime components of N are graph manifolds.
description: 18 pages v2: minor modifications
Lower bounds for k-distance approximation
Creators: name: Mérigot, Quentin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: Consider a set P of N random points on the unit sphere of dimension $d-1$, and the symmetrized set S = P union (-P). The halving polyhedron of S is defined as the convex hull of the set of centroids of N distinct points in S. We prove that after appropriate rescaling this halving polyhedron is Hausdorff close to the unit ball with high probability, as soon as the number of points grows like $Omega(d log(d))$. From this result, we deduce probabilistic lower bounds on the complexity of approximations of the distance to the empirical measure on the point set by distance-like functions.
Spin pumping and interlayer exchange coupling through palladium
Creators: name: Santos, D. L. R.
name: Venezuela, P.
name: Muniz, R. B.
name: Costa, A. T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The magnetic behaviour of ultrathin ferromagnetic films deposited on substrates is strongly affected by the properties of the substrate. We investigate the spin pumping rate, interlayer exchange coupling and dynamic exchange coupling between ultrathin ferromagnetic films through palladium, a non-magnetic substrate that displays strong Stoner enhancement. We find that the interlayer exchange coupling, both in the static and dynamic versions, is qualitatively affected by the substrate's Stoner enhancement. For instance, the oscillatory behavior that is a hallmark property of the RKKY exchange coupling is strongly suppressed by Stoner enhancement. Although the spin pumping rate of ferromagnetic films atop palladium is only mildly changed by Stoner enhancement the change is large enough to be detected experimentally. The qualitative aspects of our results for palladium are expected to remain valid for any non-magnetic substrate where Coulomb repulsion is large.
The comfortable driving model revisited: Traffic phases and phase transitions
Creators: name: Knorr, Florian
name: Schreckenberg, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences
subject: 60K30

description: We study the spatiotemporal patterns resulting from different boundary conditions for a microscopic traffic model and contrast it with empirical results. By evaluating the time series of local measurements, the local traffic states are assigned to the different traffic phases of Kerner's three-phase traffic theory. For this classification we use the rule-based FOTO-method, which provides `hard' rules for this assignment. Using this approach, our analysis shows that the model is indeed able to reproduce three qualitatively different traffic phases: free flow (F), synchronized traffic (S), and wide moving jams (J). In addition, we investigate the likelihood of transitions between the three traffic phases. We show that a transition from free flow (F) to a wide moving jam (J) often involves an intermediate transition; first from free flow F to synchronized flow S and then from synchronized flow to a wide moving jam. This is supported by the fact that the so called F->S transition (from free flow to synchronized traffic) is much more likely than a direct F->J transition. The model under consideration has a functional relation between traffic flow and traffic density. The fundamental hypothesis of the three-phase traffic theory, however, postulates that the steady states of synchronized flow occupy a two-dimensional region in the flow-density plane. Due to the obvious discrepancy between the model investigated here and the postulate of the three-phase traffic theory, the good agreement that we found could not be expected. For a more detailed analysis, we also studied the vehicle dynamics at a microscopic level and provide a comparison of real detector data with simulated data of the identical highway segment.
description: 20 pages, 8 figures
On the Unirationality of del Pezzo surfaces of degree two
Creators: name: Salgado, Cecília
name: Testa, Damiano
name: Várilly-Alvarado, Anthony
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J26, 14G15

description: Among geometrically rational surfaces, del Pezzo surfaces of degree two over a field k containing at least one point are arguably the simplest that are not known to be unirational over k. Looking for k-rational curves on these surfaces, we extend some earlier work of Manin on this subject. We then focus on the case where k is a finite field, where we show that all except possibly three explicit del Pezzo surfaces of degree two are unirational over k.
description: 20 pages, Magma code included at the end of the source file
Similarity of eigenstates in generalized labyrinth tilings
Creators: name: Thiem, Stefanie
name: Schreiber, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The eigenstates of d-dimensional quasicrystalline models with a separable Hamiltonian are studied within the tight-binding model. The approach is based on mathematical sequences, constructed by an inflation rule P = {w -> s, s -> sws^(b-1)} describing the weak/strong couplings of atoms in a quasiperiodic chain. Higher-dimensional quasiperiodic tilings are constructed as a direct product of these chains and their eigenstates can be directly calculated by multiplying the energies or wave functions of the chain, respectively. Applying this construction rule, the grid in d dimensions splits into 2^(d-1) different tilings, for which we investigated the characteristics of the wave functions. For the standard two-dimensional labyrinth tiling constructed from the octonacci sequence (b=2) the lattice breaks up into two identical lattices, which consequently yield the same eigenstates. While this is not the case for other b, our numerical results show that the wave functions of the different grids become increasingly similar for large system sizes. This can be explained by the fact that the structure of the 2^(d-1) grids mainly differs at the boundaries and thus for large systems the eigenstates approach each other. This property allows us to analytically derive properties of the higher-dimensional generalized labyrinth tilings from the one-dimensional results. In particular participation numbers and corresponding scaling exponents have been determined.
description: 7 pages, 5 figures
EVALUATION OF LONG-TERM PERFORMANCE OF HIGH RECYCLED ASPHALT PAVEMENT (RAP) MIXES AND DEVELOPMENT OF MODELS FOR RAP BINDER CONTRIBUTION AND AGING
Creators: name: Cantrell, Logan
Publisher: name: Washington State University
Year: 2022
Subjects: 100% RAP
asphalt mixture performance
RAP binder contribution
recycled asphalt pavement (RAP)
rejuvenators
Aging

description: Recycled asphalt pavement (RAP) is one of the most recycled materials in the United States. It provides many environmental and economic benefits, but RAP usage has stagnated recently. The advancement in rejuvenators and performance testing renews the ability to increase RAP levels and address cracking concerns. This study investigated the use of RAP in asphalt concrete and if it could be increased beyond current limits without adversely affecting long-term performance. These results provide evidence and tools for increasing RAP both in the mix design and production stages. Additionally, the models developed can make implementing performance testing in production much more feasible. Field constructability and performance were first evaluated to ensure current high RAP (HR) mixes are performing adequately. This systematic approach found that HR mixes performed equal or better than low RAP (LR) typical mixes with lower density deviation and less longitudinal cracking. Then, super high RAP (SHR) mixes, with RAP levels up to 100%, were designed using current WSDOT volumetric design standards. SHR mixes were statistically similar in rutting and cracking performance to typical 20% RAP mixes except for polymer modified binder mixes with RAP levels above 80% due to an overall reduction in polymer and degradation of polymer cross-linking. Cracking performance could be improved with the slight addition of a virgin binder.
description: With SHR mixes showing potential, models based on mix mechanics were developed to aid in implementation. First, a model to predict RAP binder contribution (PRBC) was developed based on mix performance testing. Lab results showed that the mix with a neat virgin binder with softer RAP contributed more than the modified virgin binder with stiffer RAP. The model was then adjusted for use with plant mixes and showed HR mixes, and V binders with more PRBC than LR mixes and H binders. An aging model was then developed to predict cracking performance as a mix aged. Next, a logarithmic-based model was chosen to predict aged CTIndex results, which characterizes both oxidative aging and polymer degradation. Finally, a 3D model was created to predict the effects of both RAP addition and aging on CTIndex samples.
Online Deliberation Design: Choices, Criteria, and Evidence
Creators: name: Davies, Todd
name: Chandler, Reid
Publisher: name: arXiv
Year: 2013
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: H.5.3; K.4.0; H.4.3; H.1.2; H.5.1

description: This chapter reviews empirical evidence bearing on the design of online forums for deliberative civic engagement. Dimensions of design are defined for different aspects of the deliberation: its purpose, the target population, the spatiotemporal distance separating participants, the communication medium, and the deliberative process to be followed. After a brief overview of criteria for evaluating different design options, empirical findings are organized around design choices. Research has evolved away from treating technology for online deliberation dichotomously (either present or not) toward nuanced findings that differentiate between technological features, ways of using them, and cultural settings. The effectiveness of online deliberation depends on how well the communicative environment is matched to the deliberative task. Tradeoffs, e.g. between rich and lean media and between anonymous and identifiable participation, suggest different designs depending on the purpose and participants. Findings are limited by existing technologies, and may change as technologies and users co-evolve.
description: Appeared in Tina Nabatchi, John Gastil, G. Michael Weiksner, and Matt Leighninger (Editors), Democracy in Motion: Evaluating the Practice and Impact of Deliberative Civic Engagement, Oxford University Press, October 2012, pp. 103-131; 32 pages, 2 tables
WWW Webarchivierung Wieso? Weshalb? Warum?
Creators: name: Schoger, Astrid
name: Beinert, Tobias
name: Schmid, Katharina
name: Donig, Simon
name: Eckl, Markus
Publisher: name: Zenodo
Year: 2021
Subjects: digital preservation
web archiving

description: Präsentationsfolien der nestor virtuell Veranstaltung vom 22.07.2021 Abstract:
 Websites sind ein wichtiger Teil des kulturellen Gedächtnisses in der digitalen Gesellschaft. Der Aufgabe, diese Inhalte im Web als eine neue Form von Quellenmaterial für die Forschung dauerhaft zu sichern und zugänglich zu machen, haben sich Gedächtnis- und Forschungsinstitutionen inzwischen angenommen. Wir bieten im ersten Teil unseres Webseminars einen Einblick, wie Sammlungen von Webarchiven aufgebaut werden können.
 Derartige Sammlungen bieten einen wertvollen Fundus für die Untersuchung und Beantwortung von Forschungsfragen verschiedenster Fachrichtungen. Doch wie lassen sich diese Potenziale als Quellen der Forschung überhaupt nutzen?
 Dieser Frage gehen wir im zweiten Teil unseres Webseminars nach. Neben den fachspezifischen Potenzialen eines „Close Reading“, eröffnen Werkzeuge aus dem Bereich der Digital Humanities auch Möglichkeiten zu einem „Distant Reading“ des archivierten Webs. Nach der Einführung von Werkzeugen zur Text- und Linkextraktion aus den Webarchiven werden einfache und fortgeschrittene Methoden für deren Analyse und Visualisierung vorgestellt (etwa Frequenz- und Kollokationsanalyse, Keyword in Context oder Topic Modeling für Texte sowie die Modellierung von Netzwerkdaten), um exemplarisch aufzuzeigen, wie Webarchive als Forschungsdaten genutzt werden können.
 Das Webseminar richtet sich an alle, die Webarchivsammlungen aufbauen oder wissenschaftlich nutzen wollen, von Gedächtnisinstitutionen bis zu Forschenden.
Lipschitz stability estimate in the inverse Robin problem for the Stokes system
Creators: name: Egloffe, Anne-Claire
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We are interested in the inverse problem of recovering a Robin coefficient defined on some non accessible part of the boundary from available data on another part of the boundary in the nonstationary Stokes system. We prove a Lipschitz stability estimate under the \textit{a priori} assumption that the Robin coefficient lives in some compact and convex subset of a finite dimensional vectorial subspace of the set of continuous functions. To do so, we use a theorem proved by L. Bourgeois which establishes Lipschitz stability estimates for a class of inverse problems in an abstract framework.
Nonlinear Plasma Wave in Magnetized Plasmas
Creators: name: Bulanov, Sergei V.
name: Esirkepov, Timur Zh.
name: Kando, Masaki
name: Koga, James K.
name: Hosokai, Tomonao
name: Zhidkov, Alexei G.
name: Kodama, Ryosuke
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Nonlinear axisymmetric cylindrical plasma oscillations in magnetized collisionless plasmas are a model for the electron fluid collapse on the axis behind an ultrashort relativisically intense laser pulse exciting a plasma wake wave. We present an analytical description of the strongly nonlinear oscillations showing that the magnetic field prevents closing of the cavity formed behind the laser pulse. This effect is demonstrated with 3D PIC simulations of the laser-plasma interaction. An analysis of the betatron oscillations of fast electrons in the presence of the magnetic field reveals a characteristic "Four-Ray Star" pattern which has been observed in the image of the electron bunch in experiments [T. Hosokai, et al., Phys. Rev. Lett. 97, 075004 (2006)].
description: 14 pages, 13 figures
Effect of electrode geometry on photovoltaic performance of polymer solar cells
Creators: name: Li, Meng
name: Ma, Heng
name: Wang, Zhaokui
name: Wang, Chuankun
name: Jiang, Yurong
name: Liu, Ning
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This paper investigates the impact of electrode geometry on the performance of polymer solar cells (PSCs). Four types of negative electrodes with equal area (0.09 cm2) but different shape (round, oval, square, and triangular) are evaluated with respect to short-circuit current density, open-circuit voltage, fill factor, and power conversion efficiency of PSCs. The results show that the device with round electrodes gives the best photovoltaic performance; in contrast, the device with triangular electrodes reveals the worst properties. Maximum almost twice increase in PCE with round electrode is obtained in the devices compared with that of the triangular electrode. As a conclusion, the electrode boundary curvature has a strong influence on the performance of PSCs. The larger curvature, i.e. the sharper electrodes edge, maybe is a negative effector on exciton separation and carrier transport in PSC system.
Lacustrine boundary mixing and lateral transport driven by internal waves
Creators: name: Nielson, Jeffrey R
Publisher: name: Washington State University
Year: 2022
Subjects: Intrusions
Mixing
Stratification
Boundary Layers
Internal Waves
Turbulence
Fluid Mechanics

description: This dissertation describes mixing and transport in a small lake, with an emphasis on processes influenced by basin-scale internal waves (i.e., internal seiches). Seiche-induced variations in turbulence, bottom mixed layer entrainment, and offshore advection from the sloping bottom boundary layer (BBL) were evaluated with measurements from the metalimnion, using pulse-coherent acoustic Doppler current profilers and thermistor strings. Over an initial 74-day deployment, estimates of turbulent dissipation, and two different models of mixing efficiency, suggest that >80% of near-bed turbulent buoyancy flux occurred during the downslope flow phase of the internal seiche (seiche period 10–24 hours). During downslope flow, thin bottom mixed layers formed and slowly thickened over hours. Mixed-layer thickening was consistent with a newly developed model, in which the effect of strain-induced periodic stratification (SIPS) on entrainment is proportional to the ratio between layer thickness and a modified Monin-Obukhov length that quantifies a SIPS-induced buoyancy flux. Transitions to the upslope flow phase of the internal seiche were marked by arrivals of sharp, non-breaking (nearly horizontal) cold fronts, which displaced the mixed layers that had formed during the previous downslope phase, lifting them from the bed. The detached mixed layers then flowed offshore above fronts. A second deployment partially resolved the extent of the resulting jet-like intrusions as they transported water offshore from the BBL, along the thermocline, and revealed seiche-coherent vertical propagation from the bed to the base of the surface mixed layer. When averaged over multiple seiche cycles, the separated jets were responsible for a substantial mean lateral flux (1.9 m3s-1, comparable to river discharge into the lake) into the interior at thermocline depths. Mean lateral flux estimates from both ends of the lake suggest flushing times of 2–3 days in the thermocline and overlying surface layer. This work is described by three separate manuscripts herein.
Fermi-LAT measurement of the diffuse gamma-ray emission and constraints on the Galactic Dark Matter signal
Creators: name: Zaharijas, Gabrijela
name: Conrad, Jan
name: Cuoco, Alessandro
name: Yang, Zhaoyu
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study diffuse gamma-ray emission at intermediate Galactic latitudes measured by the Fermi Large Area Telescope with the aim of searching for a signal from dark matter annihilation or decay. In the absence of a robust dark matter signal, we set conservative dark matter limits requiring that the dark matter signal does not exceed the observed diffuse gamma-ray emission. A second set of more stringent limits is derived based on modeling the foreground astrophysical diffuse emission. Uncertainties in the height of the diffusive cosmic-ray halo, the distribution of the cosmic-ray sources in the Galaxy, the cosmic-ray electron index of the injection spectrum and the column density of the interstellar gas are taken into account using a profile likelihood formalism, while the parameters governing the cosmic-ray propagation have been derived from fits to local cosmic-ray data. The resulting limits impact the range of particle masses over which dark matter thermal production in the early Universe is possible, and challenge the interpretation of the PAMELA/Fermi-LAT cosmic ray anomalies as annihilation of dark matter.
description: Invited talk at the 'SciNeGHE 2012', to appear in the Conference Proceedings
The WiggleZ Dark Energy Survey: measuring the cosmic growth rate with the two-point galaxy correlation function
Creators: name: Contreras, Carlos
name: Blake, Chris
name: Poole, Gregory B.
name: Marin, Felipe
name: Brough, Sarah
name: Colless, Matthew
name: Couch, Warrick
name: Croom, Scott
name: Croton, Darren
name: Davis, Tamara M.
name: Drinkwater, Michael J.
name: Forster, Karl
name: Gilbank, David
name: Gladders, Mike
name: Glazebrook, Karl
name: Jelliffe, Ben
name: Jurek, Russell J.
name: Li, I-hui
name: Madore, Barry
name: Martin, D. Christopher
name: Pimbblet, Kevin
name: Pracy, Michael
name: Sharp, Rob
name: Wisnioski, Emily
name: Woods, David
name: Wyder, Ted K.
name: Yee, H. K. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The growth history of large-scale structure in the Universe is a powerful probe of the cosmological model, including the nature of dark energy. We study the growth rate of cosmic structure to redshift $z = 0.9$ using more than $162{,}000$ galaxy redshifts from the WiggleZ Dark Energy Survey. We divide the data into four redshift slices with effective redshifts $z = [0.2,0.4,0.6,0.76]$ and in each of the samples measure and model the 2-point galaxy correlation function in parallel and transverse directions to the line-of-sight. After simultaneously fitting for the galaxy bias factor we recover values for the cosmic growth rate which are consistent with our assumed $Λ$CDM input cosmological model, with an accuracy of around 20% in each redshift slice. We investigate the sensitivity of our results to the details of the assumed model and the range of physical scales fitted, making close comparison with a set of N-body simulations for calibration. Our measurements are consistent with an independent power-spectrum analysis of a similar dataset, demonstrating that the results are not driven by systematic errors. We determine the pairwise velocity dispersion of the sample in a non-parametric manner, showing that it systematically increases with decreasing redshift, and investigate the Alcock-Paczynski effects of changing the assumed fiducial model on the results. Our techniques should prove useful for current and future galaxy surveys mapping the growth rate of structure using the 2-dimensional correlation function.
description: 11 pages, 9 figures
Le métier de Scientifique en Intelligence Artificielle (Gymnase du Bugnon)
Creators: name: Defferrard, Michaël
Publisher: name: Zenodo
Year: 2022

description: Le métier de Scientifique (en Intelligence Artificielle), semaine technique au Gymnase du Bugnon, organisée par IngCH, Lausanne, 2022-11-18.
Braz Teixeira, A.: Conceito e formas de democracia em Portugal e outros estudos de história das ideias, Lisboa 2008
Creators: name: Cunha, Conceição Ferreira Da
Publisher: name: Humanística e Teologia
Year: 2008

description: Humanística e Teologia, v. 29 n. 1 (2008): Gianni Vattimo: o regresso do religioso ou o religioso como regresso
Issues and Challenges in Measuring Environmental Expenditures by U.S. Manufacturing: The Redevelopment of the PACE Survey
Creators: name: Becker, Randy
name: Shadbegian, Ron
name: Becker, Randy
name: Shadbegian, Ron
Publisher: name: Unknown
Year: 2007
Subjects: subject: Environmental Economics and Policy
subject: Industrial Organization
subject: Research and Development/Tech Change/Emerging Technologies
subject: Survey design
subject: survey evaluation
subject: sampling
subject: environmental costs
subject: manufacturing

description: The Pollution Abatement Costs and Expenditures (PACE) survey is the most comprehensive source of information on U.S. manufacturing’s capital expenditures and operating costs associated with pollution abatement. In 2003, the U.S. Environmental Protection Agency began a significant initiative to redevelop the survey, guided by the advice of a multi-disciplinary workgroup consisting of economists, engineers, survey design experts, and experienced data users, in addition to incorporating feedback from key manufacturing industries. This paper describes some of these redevelopment efforts. Issues discussed include the approach to developing the new survey instrument, methods used to evaluate (and improve) its performance, innovations in sampling, and the special development and role of outside expertise. The completely redesigned PACE survey was first administered in early 2006.
title: Research on the Conservation and Renewal of the Traditional Settlements of Diqiang Ethnic Group in Western Sichuan Based on a Quantitative Form Analysis
Creators: name: Quan, Wen
name: Ying, Lu
name: Zhou, Mo
Publisher: name: Publishing House of Poznan University of Technology
Year: 2023

description: Zeszyty Naukowe Politechniki Poznańskiej. Architektura, Urbanistyka, Architektura Wnętrz, 14, 183-195
Quantum mechanics of many particles defined on twisted N-enlarged Newton-Hooke space-times
Creators: name: Daszkiewicz, Marcin
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide the quantum mechanics of many particles moving in twisted N-enlarged Newton-Hooke space-time. In particular, we consider the example of such noncommutative system - the set of M particles moving in Coulomb field of external point-like source and interacting each other also by Coulomb potential.
description: 13 pages, Latex source. arXiv admin note: text overlap with arXiv:1104.3243
Electrodynamics of BaFe2As2 from infrared measurements under pressure
Creators: name: Baldassarre, L.
name: Perucchi, A.
name: Postorino, P.
name: Lupi, S.
name: Marini, C.
name: Malavasi, L.
name: Jiang, J.
name: Weiss, J. D.
name: Hellstrom, E. E.
name: Pallecchi, I.
name: Dore, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report on an infrared study on the undoped compound BaFe2As2 as a function of both pressure (up to about 10 GPa) at three temperatures (300, 160, and 110 K). The evolution with pressure and temperature of the optical conductivity shows that, by increasing pressure, the mid-infrared absorptions associated with magnetic order are lowered while the Drude term increases, indicating the evolution towards a conventional metallic state. We evaluate the spectral weight dependence on pressure comparing it to that previously found upon doping. The whole optical results indicate that lattice modifications can not be recognized as the only parameter determining the low-energy electrodynamics in these compounds.
New Research Suggests that Emissions Reductions May Be a Risky and Very Expensive Way to Avoid Dangerous Global Climate Changes
Creators: name: Carlin, Alan
name: Carlin, Alan
Publisher: name: Unknown
Year: 2007
Subjects: subject: Environmental Economics and Policy
subject: Risk and Uncertainty
subject: Global warming control
subject: global climate change control
subject: implementation

description: Proponents of greenhouse gas emissions reductions have long assumed that such reductions are the best approach to global climate change control and sometimes argued that they are the least risky approach. It is now generally understood that to be effective such reductions would have to involve most of the world and be very extensive and rapidly implemented. This paper examines the question of whether it is feasible to use only this approach to control dangerous global climate changes, the most critical of the climate change control objectives. I show that in one of two critical cases analyzed recent papers provide evidence that such an approach is not a feasible single approach to avoiding the dangerous climate changes predicted by a very prominent group of US climate change researchers. In the other case using a widely accepted international standard I show that such an approach appears to be very risky and much more expensive than previously thought. These conclusions further reinforce previous research that emissions reductions alone do not appear to be an effective and efficient single strategy for climate change control. So although emissions reductions can play a useful role in climate change control, other approaches would appear to be needed if dangerous climate changes are to be avoided. This conclusion suggests that the current proposals in a number of Western European countries and the United States to use emissions reductions as the sole means to control global warming may be doomed to failure in terms of avoiding such dangerous changes. An alternative approach is briefly discussed that would be more effective and efficient, and could avoid the perilous risks and high costs inherent in an emissions reduction only approach.
title: 	Architektura wnętrz jako odpowiedź na potrzeby seniorów – wzorcowe mieszkanie seniora jako wytyczna projektowa kształtowania programu funkcjonalnego mieszkania przeznaczonego dla osób starszych
Creators: name: Poluk, Dominika
Publisher: name: Publishing House of Poznan University of Technology
Year: 2023

description: Zeszyty Naukowe Politechniki Poznańskiej. Architektura, Urbanistyka, Architektura Wnętrz, 14, 67-90
Slow-roll trajectories in Chromo-Natural and Gauge-flation Models, an exhaustive analysis
Creators: name: Maleknejad, A.
name: Zarei, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present an exhaustive analysis on the classical solutions of the Chromo-natural model. We showed that starting from an arbitrary axion field value $χ_0\in(0,fπ)$, it is possible to have successful slow-roll inflation and working out the analytical solution of the number of e-folding, we determine the allowed region of the parameters corresponding to each $χ_0$ value. Having the allowed parameter region, then we study the behavior of the solutions respect to the initial value of the axion field.
description: 7 pages, 7 figures
Guidelines for Systematic Review in Discussion Forums
Creators: name: , Felipe
Publisher: name: Zenodo
Year: 2022

description: Discussion forums like StackOverflow are an essential part of day-to-day modern software development. From small bugs and tutorials to high level discussions about software architecture and project management. These forums bring with them the point of view of practitioners and reflect tendencies from the past and from the present, in other words, they are a meeting point of practitioners to discuss various topics regarding software development. Despite being open for everyone to contribute, discussion forums do not lack credibility. The questions, answers, comments and even users are subject to community-moderation and reputation systems, which bring more confidence to data. Despite the popularity of discussion forums among both practitioners and researchers, the literature lacks approaches that guide the process of analyzing and systematically reviewing this type of literature. This becomes especially important given the massive amount of data that can be generated with queries to these datasets. In this context, this work aims to build a guideline and tools that can help researchers in the systematic review of gray literature from discussion forums. This approach enables a faster and more streamline process of extraction and analysis, which can help practitioners and researchers to obtain useful data and insights. We are currently performing studies in various forums and the results so far pointed out some aspects that can be used to categorize the forum posts.
Stability of spin droplets in realistic quantum Hall devices
Creators: name: Atci, H.
name: Erkarslan, U.
name: Siddiki, A.
name: Rasanen, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the formation and characteristics of "spin droplets",i.e., compact spin-polarized configurations in the highest occupied Landau level, in an etched quantum Hall device at filling factors $2\leqν\leq3$. The confining potential for electrons is obtained with self-consistent electrostatic calculations on a GaAs/AlGaAs heterostructure with experimental system parameters. Real-space spin-density-functional calculations for electrons confined in the obtained potential show the appearance of stable spin droplets at $ν\sim 5/2$. The qualitative features of the spin droplet are similar to those in idealized (parabolic) quantum-dot systems. The universal stability of the state against geometric deformations underline the applicability of spin droplets in, e.g., spin-transport through quantum point contacts.
description: 11 pages, 6 figures
The Structure of the Milky Way's Hot Gas Halo
Creators: name: Miller, Matthew
name: Bregman, Joel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Milky Way's million degree gaseous halo contains a considerable amount of mass that, depending on its structural properties, can be a significant mass component. In order to analyze the structure of the Galactic halo, we use XMM-Newton Reflection Grating Spectrometer archival data and measure OVII K alpha absorption-line strengths toward 26 active galactic nuclei, LMC X-3, and two Galactic sources (4U 1820-30 and X1735-444). We assume a beta-model as the underlying gas density profile and find best-fit parameters of n_o = 0.46^{+0.74}_{-0.35} cm^-3, r_c = 0.35^{+0.29}_{-0.27} kpc, and beta = 0.71^{+0.13}_{-0.14}. These parameters result in halo masses ranging between M(18 kpc) = 7.5^{+22.0}_{-4.6} x 10^8 M_sun and M(200 kpc) = 3.8^{+6.0}_{-0.5} x 10^{10} M_sun assuming a gas metallicity of Z = 0.3 Z_sun, which are consistent with current theoretical and observational work. The maximum baryon fraction from our halo model of f_b = 0.07^{+0.03}_{-0.01} is significantly smaller than the universal value of f_b = 0.171, implying the mass contained in the Galactic halo accounts for 10% - 50% of the missing baryons in the Milky Way. We also discuss our model in the context of several Milky Way observables, including ram pressure stripping in dwarf spheroidal galaxies, the observed X-ray emission measure in the 0.5 - 2 keV band, the Milky Way's star formation rate, spatial and thermal properties of cooler gas (~10^5 K) and the observed Fermi bubbles toward the Galactic center. Although the metallicity of the halo gas is a large uncertainty in our analysis, we place a lower limit on the halo gas between the Sun and the Large Magellanic Cloud (LMC). We find that Z >~ 0.2 Z_sun based on the pulsar dispersion measure toward the LMC.
description: 33 pages, 10 figures, accepted to ApJ; typos are corrected, references added
Deep Einstein@Home All-sky Search for Continuous Gravitational Waves in LIGO O3 Public Data
Creators: name: Steltner, B.
name: Papa, M.A.
name: Eggenstein, H.-B.
name: Prix, R.
name: Bensch, M.
name: Allen, B.
name: Machenschalk, B.
Publisher: name: London : Institute of Physics Publ.
Year: 2023
Subjects: subject: binary mergers
subject: instability
subject: catalog
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie

description: We present the results of an all-sky search for continuous gravitational waves in the public LIGO O3 data. The search covers signal frequencies 20.0 Hz ≤ f ≤ 800.0 Hz and a spin-down range down to −2.6 × 10−9 Hz s−1, motivated by detectability studies on synthetic populations of Galactic neutron stars. This search is the most sensitive all-sky search to date in this frequency/spin-down region. The initial search was performed using the first half of the public LIGO O3 data (O3a), utilizing graphical processing units provided in equal parts by the volunteers of the Einstein@Home computing project and by the ATLAS cluster. After a hierarchical follow-up in seven stages, 12 candidates remain. Six are discarded at the eighth stage, by using the remaining O3 LIGO data (O3b). The surviving six can be ascribed to continuous-wave fake signals present in the LIGO data for validation purposes. We recover these fake signals with very high accuracy with our last stage search, which coherently combines all O3 data. Based on our results, we set upper limits on the gravitational-wave amplitude h 0 and translate these into upper limits on the neutron star ellipticity and on the r-mode amplitude. The most stringent upper limits are at 203 Hz, with h 0 = 8.1 × 10−26 at the 90% confidence level. Our results exclude isolated neutron stars rotating faster than 5 ms with ellipticities greater than 5 × 10 − 8 d 100 pc within a distance d from Earth and r-mode amplitudes α ≥ 10 − 5 d 100 pc for neutron stars spinning faster than 150 Hz.
Tunability of the THz space-charge modulation in a vacuum microdiode
Creators: name: Jonsson, P.
name: Ilkov, M.
name: Manolescu, A.
name: Pedersen, A.
name: Valfells, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Under certain conditions, space-charge limited emission in vacuum microdiodes manifests as clearly defined bunches of charge with a regular size and interval. The frequency corresponding to this interval is in the Terahertz range. In this computational study it is demonstrated that, for a range of parameters, conducive to generating THz frequency oscillations, the frequency is dependant only on the cold cathode electric field and on the emitter area. For a planar micro-diode of given dimension, the modulation frequency can be easily tuned simply by varying the applied potential. Simulations of the microdiode are done for 84 different combinations of emitter area, applied voltage and gap spacing, using a molecular dynamics based code with exact Coulomb interaction between all electrons in the vacuum gap, which is of the order 100. It is found, for a fixed emitter area, that the frequency of the pulse train is solely dependent on the vacuum electric field in the diode, described by a simple power law. It is also found that, for a fixed value of the electric field, the frequency increases with diminishing size of the emitting spot on the cathode. Some observations are made on the spectral quality, and how it is affected by the gap spacing in the diode and the initial velocity of the electrons.
Making sense of recent results on electrons and positrons from cosmic ray experiments
Creators: name: Evoli, Carmelo
Publisher: name: Zenodo
Year: 2022
Subjects: cosmic rays
astroparticle physics
cosmic antimatter

description: Slides of the talk I gave at the 'Cosmic Rays in the Multi-Messenger Era' conference 2022: https://indico.in2p3.fr/event/27666/timetable/