cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Combining Bayesian methods and aircraft observations to constrain the HO. + NO2 reaction rate
Creators: name: Pye, H. O.T.
name: Crooks, J.
name: Henderson, B. H.
name: Vizuete, W.
name: Cohen, R. C.
name: Pinder, R. W.
name: Carlton, A. G.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Tropospheric ozone is the third strongest greenhouse gas, and has the highest uncertainty in radiative forcing of the top five greenhouse gases. Throughout the troposphere, ozone is produced by radical oxidation of nitrogen oxides (NOx = NO + NO2). In the upper troposphere (8–10 km), current chemical transport models under-estimate nitrogen dioxide (NO2) observations. Improvements to simulated NOx production from lightning have increased NO2 predictions, but the predictions in the upper troposphere remain biased low. The upper troposphere has low temperatures (T < 250 K) that increase the uncertainty of many important chemical reaction rates. This study constrains uncertain reaction rates by combining model predictions with measurements from the Intercontinental Chemical Transport Experiment-North America observational campaign. The results show that the nitric acid formation rate, which is the dominant sink of NO2 and radicals, is currently over-estimated by 22% in the upper troposphere. The results from this study suggest that the temperature sensitivity of nitric acid formation is lower than currently recommended. Since the formation of nitric acid removes nitrogen dioxide and radicals that drive the production of ozone, the revised reaction rate will affect ozone concentrations in upper troposphere impacting climate and air quality in the lower troposphere.
Impact of lightning-NO on eastern United States photochemistry during the summer of 2006 as determined using the CMAQ model
Creators: name: Pinder, R. W.
name: Pickering, K. E.
name: Henderson, B. H.
name: Appel, K. W.
name: Allen, D. J.
name: Prados, A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: A lightning-nitrogen oxide (NO) algorithm is implemented in the Community Multiscale Air Quality Model (CMAQ) and used to evaluate the impact of lightning-NO emissions (LNOx) on tropospheric photochemistry over the United States during the summer of 2006.  For a 500 mole per flash lightning-NO source, the mean summertime tropospheric NO2 column agrees with satellite-retrieved columns to within −5 to +13%. Temporal fluctuations in the column are moderately well simulated; however, the addition of LNOx does not lead to a better simulation of day-to-day variability. The contribution of lightning-NO to the model column ranges from ~10% in the northern US to >45% in the south-central and southeastern US. Lightning-NO adds up to 20 ppbv to upper tropospheric model ozone and 1.5–4.5 ppbv to 8-h maximum surface layer ozone, although, on average, the contribution of LNOx to model surface ozone is 1–2 ppbv less on poor air quality days. LNOx increases wet deposition of oxidized nitrogen by 43% and total deposition of nitrogen by 10%. This additional deposition reduces the mean magnitude of the CMAQ low-bias in nitrate wet deposition with respect to National Atmospheric Deposition monitors to near zero.  Differences in urban/rural biases between model and satellite-retrieved NO2 columns were examined to identify possible problems in model chemistry and/or transport. CMAQ columns were too large over urban areas. Biases at other locations were minor after accounting for the impacts of lightning-NO emissions and the averaging kernel on model columns.  In order to obtain an upper bound on the contribution of uncertainties in NOy chemistry to upper tropospheric NOx low biases, sensitivity calculations with updated chemistry were run for the time period of the Intercontinental Chemical Transport Experiment (INTEX-A) field campaign (summer 2004). After adjusting for possible interferences in NO2 measurements and averaging over the entire campaign, these updates reduced 7–9 km biases from 32 to 17% and 9–12 km biases from 57 to 46%. While these changes lead to better agreement, a considerable unexplained NO2 low-bias remains in the uppermost troposphere.
Evaluation of Photos Monte Carlo ambiguities in case of four fermion final states
Creators: name: Kusina, A.
name: Was, Z.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: With the increasing precision requirements and growing spectrum of applications of Monte Carlo simulations the evaluation of different components of such simulations and their systematic ambiguities become of utmost interest. In the following, we will address the question of systematic errors for Photos Monte Carlo for simulation of bremsstrahlung corrections in final states, which can not, in principle, be identified as a decay of resonances. It is possible, because the program features explicit and exact parametrization of phase space for multi-body plus multi-photon final states. The Photos emission kernel for some processes consist of complete matrix element, in the remaining cases appropriate approximation is used. Comparisons with results of simulations, from generators based on exact phase space and exact fixed order matrix elements, can be used. For the purpose of such validations Photos provides an option to restrict emissions to single photon only. In the current work we concentrate on final state bremsstrahlung in $q \bar{q}(e^+e^-) \to l^+l^- l^+l^- γ$ and $γγ\to l^+l^- γ$ processes. The reference distributions used as a cross-check are obtained from the fixed-order MadGraph Monte Carlo simulations. For the purpose of validation we concentrate on those phase space regions where Photos is not expected to work on the basis of its design alone. These phase space regions of hard, non-collinear photons, do not contribute to large logarithmic terms. We find that in these phase space regions the differences between Photos and MadGraph results do not surpass a few percent and these regions, in turn, contribute about 10% to the observed process rates. This is encouraging in view of the possible ambiguities for precise calculation of realistic observables.
description: 24 pages, 8 figures plus additional figures in appendices. Updated to match published version
Some identities on degenerate r-stirling numbers via boson operators
Creators: name: Kim, Taekyun
name: Kim, Dae San
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11B73, 11B83

description: Broder introduced the r-Stirling numbers of the first kind and of the second kind which enumerate restricted permutations and respectively restricted partitions, the restriction being that the first r elements must be in distinct cycles and respectively in distinct subsets. Kim-Kim-Lee-Park constructed the degenerate r-Stirling numbers of both kinds as degenerate versions of them. The aim of this paper is to derive some identities and recurrence relations for the degenerate r-Stirling numbers of the first kind and of the second kind via boson operators. In particular, we obtain the normal ordering of a degenerate integral power of the number operator multiplied by an integral power of the creation boson operator in terms of boson operators where the degenerate r-Stirling numbers of the second kind appear as the coefficients.
description: 12 pages
Trophic tracers quantification and statistical analyses from Progressive ontogenetic niche shift over the prolonged immaturity period of wandering albatrosses.
Creators: name: Carravieri, Alice
name: Weimerskirch, Henri
name: Bustamante, Paco
name: Cherel, Yves
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: 1) Stable isotopes and mercury analytical quantification in blood and feathers, and 2) statistical analyses
{pdf descargar} EL CUCO DE CRISTAL
Creators: name: Summer
Publisher: name: Zenodo
Year: 2024

description: EL CUCO DE CRISTAL de JAVIER CASTILLO

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EL CUCO DE CRISTAL

JAVIER CASTILLO

Idioma: CASTELLANO

Formatos: Pdf, ePub, MOBI, FB2

ISBN: 9788466374637

Editorial: DEBOLSILLO

Año de edición: 2024

 

 

 

 

 

Descargas gratuitas de libros electrónicos en mp3 EL CUCO DE CRISTAL (Literatura española) de JAVIER CASTILLO

 

Overview

¿ESTÇS PREPARADO PARA ARRIESGAR TU CORAZÓN? Vuelve Javier Castillo MAGNÉTICA - SALVAJE - MONUMENTAL - TREPIDANTE El regreso más esperado MÇS DE 2.000.000 DE EJEMPLARES VENDIDOS Un trasplante de urgencia Un donante lleno de secretos¿Que esconden los latidos de tu corazón? Nueva York, 2017. Cora Merlo, medico residente de primer año, sufre un infarto fulminante que la obliga a un trasplante de corazón. Aún convaleciente la joven recibe la visita de una extraña mujer con una enigmática oferta: pasar unos días en Steelville, un pequeño pueblo de interior, para conocer la vida de su hijo Charles, el donante de su corazón. Cora se adentra así en un hogar lleno de secretos, en un misterio que se extiende durante veinte años y en un pueblo hermetico en el que, justo el día de su llegada, desaparece un bebe en un parque público.
Graphene Oxide as an Optimal Candidate Material for Methane Storage
Creators: name: Chouhan, Rajiv K.
name: Ulman, Kanchan
name: Narasimhan, Shobhana
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Methane, the primary constituent of natural gas, binds too weakly to nanostructured carbons to meet the targets set for on-board vehicular storage to be viable. We show, using density functional theory calculations, that replacing graphene by graphene oxide increases the adsorption energy of methane by 50%. This enhancement is sufficient to achieve the optimal binding strength. In order to gain insight into the sources of this increased binding, that could also be used to formulate design principles for novel storage materials, we consider a sequence of model systems, that progressively take us from graphene to graphene oxide. A careful analysis of the various contributions to the weak binding between the methane molecule and the graphene oxide shows that the enhancement has important contributions from London dispersion interactions as well as Debye interactions and higher-order electrostatic interactions, aided by geometric curvature induced primarily by the presence of epoxy groups.
description: 12 pages, 19 figures
On Causal Equivalence by Tracing in String Rewriting
Creators: name: van Oostrom, Vincent
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We introduce proof terms for string rewrite systems and, using these, show that various notions of equivalence on reductions known from the literature can be viewed as different perspectives on the notion of causal equivalence. In particular, we show that permutation equivalence classes (as known from the lambda-calculus and term rewriting) are uniquely represented both by trace graphs (known from physics as causal graphs) and by so-called greedy multistep reductions (as known from algebra). We present effective maps from the former to the latter, topological multi-sorting TM, and vice versa, the proof term algebra [[ ]].
description: In Proceedings TERMGRAPH 2022, arXiv:2303.14219
Tropospheric distribution of sulphate aerosols mass and number concentration during INDOEX-IFP and its transport over the Indian Ocean: a GCM study
Creators: name: Le Van, P.
name: Verma, S.
name: Binkowski, F. S.
name: Sharma, O. P.
name: Boucher, O.
name: Upadhyaya, H. C.
name: Shekar Reddy, M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: The sulphate aerosols mass and number concentration during the Indian Ocean Experiment (INDOEX) Intensive Field Phase-1999 (INDOEX-IFP) has been simulated using an interactive chemistry GCM. The model considers an interactive scheme for feedback from chemistry to meteorology with internally resolving microphysical properties of aerosols. In particular, the interactive scheme has the ability to predict both particle mass and number concentration for the Aitken and accumulation modes as prognostic variables. On the basis of size distribution retrieved from the observations made along the cruise route during IFP-1999, the model successfully simulates the order of magnitude of aerosol number concentration. The results show the southward migration of minimum concentrations, which follows ITCZ (Inter Tropical Convergence Zone) migration. Sulphate surface concentration during INDOEX-IFP at Kaashidhoo (73.46° E, 4.96° N) gives an agreement within a factor of 2 to 3. The measured aerosol optical depth (AOD) from all aerosol species at KCO was 0.37 ± 0.11 while the model simulated sulphate AOD ranged from 0.05 to 0.11. As sulphate constitutes 29% of the observed AOD, the model predicted values of sulphate AOD are hence fairly close to the measured values. The model thus has capability to predict the vertically integrated column sulphate burden. Furthermore, the model results indicate that Indian contribution to the estimated sulphate burden over India is more than 60% with values upto 40% over the Arabian Sea.
QFitter -- A Quantum Fitting Framework Applied to Effective Field Theories
Creators: name: Criado, Juan Carlos
name: Kogler, Roman
name: Spannowsky, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The use of experimental data to constrain the values of the Wilson coefficients of an Effective Field Theory (EFT) involves minimising a $χ^2$ function that may contain local minima. Classical optimisation algorithms can become trapped in these minima, preventing the determination of the global minimum. The quantum annealing framework has the potential to overcome this limitation and reliably find the global minimum of non-convex functions. We present QFitter, a quantum annealing method to perform EFT fits. Using a state-of-the-art quantum annealer, we show with concrete examples that QFitter can be used to fit sets of at least eight coefficients, including their quadratic contributions. An arbitrary number of observables can be included without changing the required number of qubits. We provide an example in which $χ^2$ is non-convex and show that QFitter can find the global minimum more accurately than its classical alternatives.
description: 10 pages, 4 figures
Descargar ebook LA TONALIDAD DEL PENSAMIENTO | Descarga Libros Gratis (PDF - EPUB)
Creators: name: Balderas
Publisher: name: Zenodo
Year: 2024

description: LA TONALIDAD DEL PENSAMIENTO de BYUNG-CHUL HAN

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LA TONALIDAD DEL PENSAMIENTO

BYUNG-CHUL HAN

Idioma: CASTELLANO

Formatos: Pdf, ePub, MOBI, FB2

ISBN: 9788449342042

Editorial: PAIDOS IBERICA

Año de edición: 2024

 

 

 

 

 

Ebook deutsch kostenlos descargar LA TONALIDAD DEL PENSAMIENTO

 

Overview

Byung-Chul Han, el filósofo contemporáneo más conocido de la actualidad y uno de los más leídos en el mundo, publica con Paidós La tonalidad del pensamiento, el primer volumen de la Trilogía de las conferencias.En abril de 2023, el filósofo del momento Byung-Chul Han ofreció dos conferencias en Portugal: «Amor/Eros» y «El espíritu de la esperanza», pronunciadas en el Batalha Centro de Cinema de Oporto y en la Universidad Católica Portuguesa de Lisboa, respectivamente. Posteriormente participó en una tercera conferencia-concierto pronunciada en el Auditorio Gewandhouse de Leipzig cuyo título es «La tonalidad del pensamiento», en la que el coloquio de Han iba acompañado de la interpretación al piano de diversas piezas clásicas por Sharon Prushansky. La tonalidad del pensamiento no solo reúne el texto de las tres conferencias, sino que además ofrece fotografías de los eventos y el acceso en exclusiva a un vídeo de cada una de las ponencias. Esta edición especialmente cuidada se convertirá en una joya para los lectores del filósofo.
Investigating the influences of SO2 and NH3 levels on isoprene-derived secondary organic aerosol formation using conditional sampling approaches
Creators: name: Surratt, J. D.
name: Knipping, E. M.
name: Edgerton, E. S.
name: Shaw, S. L.
name: Lin, Y. H.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013

description: Filter-based PM2.5 samples were chemically analyzed to investigate secondary organic aerosol (SOA) formation from isoprene in a rural atmosphere of the southeastern US influenced by both anthropogenic sulfur dioxide (SO2) and ammonia (NH3) emissions. Daytime PM2.5 samples were collected during summer 2010 using conditional sampling approaches based on pre-defined high and low SO2 or NH3 thresholds. Known molecular-level tracers for isoprene SOA formation, including 2-methylglyceric acid, 3-methyltetrahydrofuran-3,4-diols, 2-methyltetrols, C5-alkene triols, dimers, and organosulfate derivatives, were identified and quantified by gas chromatography coupled to electron ionization mass spectrometry (GC/EI-MS) and ultra performance liquid chromatography coupled to electrospray ionization high-resolution quadrupole time-of-flight mass spectrometry (UPLC/ESI-HR-Q-TOFMS). Mass concentrations of six isoprene low-NOx SOA tracers contributed to 12–19% of total organic matter (OM) in PM2.5 samples collected during the sampling period, indicating the importance of the hydroxyl radical (OH)-initiated oxidation (so-called photooxidation) of isoprene under low-NOx conditions that lead to SOA formation through reactive uptake of gaseous isoprene epoxydiols (IEPOX) in this region. The contribution of the IEPOX-derived SOA tracers to total organic matter was enhanced by 1.4% (p = 0.012) under high-SO2 sampling scenarios, although only weak associations between aerosol acidity and mass of IEPOX SOA tracers were observed. This suggests that IEPOX-derived SOA formation might be modulated by other factors simultaneously, rather than only aerosol acidity. No clear associations between isoprene SOA formation and high or low NH3 conditional samples were found. Positive correlations between sulfate aerosol loadings and IEPOX-derived SOA tracers for samples collected under all conditions indicates that sulfate aerosol could be a surrogate for surface accommodation in the uptake of IEPOX onto preexisting aerosols.
{epub download} Deviens un aimant à recruteurs sur LinkedIn !  - Les meilleurs conseils de Tonton Karim pour trouver le job idéal
Creators: name: Miller
Publisher: name: Zenodo
Year: 2024

description: Deviens un aimant à recruteurs sur LinkedIn ! - Les meilleurs conseils de Tonton Karim pour trouver le job idéal pan

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Deviens un aimant à recruteurs sur LinkedIn ! - Les meilleurs conseils de Tonton Karim pour trouver le job idéal

 

Nb. de pages: 146

Format: Pdf, ePub, MOBI, FB2

ISBN: 9782416012365

Editeur: Eyrolles

Date de parution: 2023

 

 

 

Télécharger des ebooks mobiles Deviens un aimant à recruteurs sur LinkedIn ! - Les meilleurs conseils de Tonton Karim pour trouver le job idéal DJVU CHM MOBI

 

Overview

Des outils, des conseils et des astuces pour sortir du lot sur LinkedIn et décrocher le job de ses rêves. Outil incontournable de la recherche d'emploi aujourd'hui, LinkedIn compte des millions d'utilisateurs et de nombreuses fonctionnalités. Riche d'opportunités, difficile aussi de s'y démarquer. Facile à lire, synthétique et actionnable, ce livre propose des fiches pratiques pour comprendre la plateforme et attirer les recruteurs. Définition de son projet professionnel, création d'un profil béton, développement de son réseau... toutes les étapes de la recherche d'emploi y sont présentées, agrémentées de témoignages de recruteurs et entreprises.
Net radiative forcing and air quality responses to regional CO emission reductions
Creators: name: Fry, M. M.
name: Collins, W. J.
name: Naik, V.
name: Schwarzkopf, M. D.
name: Adelman, Z.
name: West, J. J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013

description: Carbon monoxide (CO) emissions influence global and regional air quality and global climate change by affecting atmospheric oxidants and secondary species. We simulate the influence of halving anthropogenic CO emissions globally and individually from 10 regions on surface and tropospheric ozone, methane, and aerosol concentrations using a global chemical transport model (MOZART-4 for the year 2005). Net radiative forcing (RF) is then estimated using the GFDL (Geophysical Fluid Dynamics Laboratory) standalone radiative transfer model. We estimate that halving global CO emissions decreases global annual average concentrations of surface ozone by 0.45 ppbv, tropospheric methane by 73 ppbv, and global annual net RF by 36.1 mW m⁻², nearly equal to the sum of changes from the 10 regional reductions. Global annual net RF per unit change in emissions and the 100 yr global warming potential (GWP₁₀₀) are estimated as -0.124 mW m⁻² (Tg CO)⁻¹ and 1.34, respectively, for the global CO reduction, and ranging from −0.115 to −0.131 mW m⁻² (Tg CO)⁻¹ and 1.26 to 1.44 across 10 regions, with the greatest sensitivities for regions in the tropics. The net RF distributions show widespread cooling corresponding to the O₃ and CH₄ decreases, and localized positive and negative net RFs due to changes in aerosols. The strongest annual net RF impacts occur within the tropics (28° S-28° N) followed by the northern midlatitudes (28° N-60° N), independent of reduction region, while the greatest changes in surface CO and ozone concentrations occur within the reduction region. Some regional reductions strongly influence the air quality in other regions, such as East Asia, which has an impact on US surface ozone that is 93% of that from North America. Changes in the transport of CO and downwind ozone production clearly exceed the direct export of ozone from each reduction region. The small variation in CO GWPs among world regions suggests that future international climate agreements could adopt a globally uniform metric for CO with little error, or could use different GWPs for each continent. Doing so may increase the incentive to reduce CO through coordinated policies addressing climate and air quality.
Additional file 1 of Effects of a mindfulness-based versus a health self-management intervention on objective cognitive performance in older adults with subjective cognitive decline (SCD): a secondary analysis of the SCD-Well randomized controlled trial
Creators: name: Whitfield, Tim
name: Demnitz-King, Harriet
name: Schlosser, Marco
name: Barnhofer, Thorsten
name: Frison, Eric
name: Coll-Padros, Nina
name: Dautricourt, Sophie
name: Requier, Florence
name: Delarue, Marion
name: Gonneaud, Julie
name: Klimecki, Olga M.
name: Lutz, Antoine
name: Paly, Léo
name: Salmon, Eric
name: Schild, Ann-Katrin
name: Walker, Zuzana
name: Jessen, Frank
name: Chételat, Gaël
name: Collette, Fabienne
name: Wirth, Miranka
name: Marchant, Natalie L.
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Sociology
subject: FOS: Sociology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. Supplementary Methods. Supplementary Results. Table S1. Collinearity diagnostics for alternate specifications of the cognitive retest effect variable. Table S2. Unadjusted (observed) and model-adjusted means for each trial arm at each timepoint (composite and individual cognitive outcomes). Table S3. Linear mixed models fitted using a linear and factorial time specification, respectively (individual outcomes only – see main paper Table 2 for composite outcomes). Table S4. Association between candidate predictors and baseline (week 0) to follow-up (week 24) change scores on composite outcomes, broken down by trial arm. Table S5. Pooled linear mixed models derived from analyses of multiply-imputed SCD-Well trial data (m = 5). Figure S1. Missing data pattern for the ‘wide’ format dataset. Figure S2. Estimated change in individual cognitive tests for each trial arm (linear-time specification). Figure S3. Estimated change in individual cognitive tests for each trial arm (linear-time specification).
{epub descargar} SISTEMAS CRÍTICOS
Creators: name: Banda
Publisher: name: Zenodo
Year: 2024

description: SISTEMAS CRÍTICOS de MARTHA WELLS

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Ficha técnica

SISTEMAS CRÍTICOS

MARTHA WELLS

Número de páginas: 152

Idioma: CASTELLANO

Formatos: Pdf, ePub, MOBI, FB2

ISBN: 9788491644903

Editorial: LA ESFERA DE LOS LIBROS

Año de edición: 2019

 

 

 

 

 

Es serie de libros descarga gratuita en pdf. SISTEMAS CRÍTICOS (Spanish Edition) de MARTHA WELLS 9788491644903 iBook RTF MOBI

 

Overview

Ganadora de los premios Hugo, Nebula y LocusGanadora de los premios Hugo, Nebula y Locus En un futuro controlado por entidades corporativas donde el viaje espacial es posible, una compañía de seguros debe aprobar y abastecer todas las misiones planetarias. Los equipos de exploración tienen que ir acompañados de androides suministrados por las aseguradoras, por su propio bien. Pero en una sociedad donde los contratos se conceden al postor más bajo, la seguridad no es lo más importante Un equipo de científicos lleva a cabo pruebas en la superficie de un planeta lejano, bajo la supervisión del androide de la aseguradora, una SegUnidad con consciencia que ha hackeado su módulo de control y que ha decidido usar el nombre —aunque nunca en voz alta— de «Matabot». No siente mucho cariño por los humanos y lo único que quiere es estar en paz para descubrir quién es en realidad. Pero cuando el equipo de una misión cercana desaparece, los científicos y su Matabot tendrán que averiguar la verdad. «Martha Wells escribe fantasía como debe ser: conmovedora, evocadora y asombrosa. Preparaos para dejaros cautivar hasta el amanecer». Kameron Hurley «¡Me encanta Matabot!». Ann Leckie, autora de Justicia auxiliar
(3068) Thomas Shaw
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
The effect of nutation angle on the flow inside a precessing cylinder and its dynamo action
Creators: name: Kumar, V.
name: Pizzi, F.
name: Giesecke, A.
name: Simkanin, J.
name: Gundrum, Th.
name: Ratajczak, M.
name: Stefani, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The effect of the nutation angle on the flow inside a precessing cylinder is experimentally explored and compared with numerical simulations. The focus is laid on the typical breakdown of the directly forced m=1 Kelvin mode for increasing precession ratio (Poincaré number), and the accompanying transition between a laminar and turbulent flow. Compared to the reference case with a 90° nutation angle, prograde rotation leads to an earlier breakdown, while in the retrograde case the forced mode continues to exist also for higher Poincaré numbers. Depending largely on the occurrence and intensity of an axisymmetric double-roll mode, a kinematic dynamo study reveals a sensitive dependency of the self-excitation condition on the nutation angle and the Poincaré number. Optimal dynamo conditions are found for 90° angle which, however, might shift to slightly retrograde precession for higher Reynolds numbers.
description: 9 pages, 8 figures
Air quality and radiative forcing impacts of anthropogenic volatile organic compound emissions from ten world regions
Creators: name: Fry, M. M.
name: Schwarzkopf, M. D.
name: Adelman, Z.
name: West, J. J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014

description: Non-methane volatile organic compounds (NMVOCs) influence air quality and global climate change through their effects on secondary air pollutants and climate forcers. Here we simulate the air quality and radiative forcing (RF) impacts of changes in ozone, methane, and sulfate from halving anthropogenic NMVOC emissions globally and from 10 regions individually, using a global chemical transport model and a standalone radiative transfer model. Halving global NMVOC emissions decreases global annual average tropospheric methane and ozone by 36.6 ppbv and 3.3 Tg, respectively, and surface ozone by 0.67 ppbv. All regional reductions slow the production of peroxyacetyl nitrate (PAN), resulting in regional to intercontinental PAN decreases and regional NOx increases. These NOx increases drive tropospheric ozone increases nearby or downwind of source regions in the Southern Hemisphere (South America, Southeast Asia, Africa, and Australia). Some regions' NMVOC emissions contribute importantly to air pollution in other regions, such as East Asia, the Middle East, and Europe, whose impact on US surface ozone is 43%, 34%, and 34% of North America's impact. Global and regional NMVOC reductions produce widespread negative net RFs (cooling) across both hemispheres from tropospheric ozone and methane decreases, and regional warming and cooling from changes in tropospheric ozone and sulfate (via several oxidation pathways). The 100 yr and 20 yr global warming potentials (GWP100, GWP20) are 2.36 and 5.83 for the global reduction, and 0.079 to 6.05 and −1.13 to 18.9 among the 10 regions. The NMVOC RF and GWP estimates are generally lower than previously modeled estimates, due to the greater NMVOC/NOx emissions ratios simulated, which result in less sensitivity to NMVOC emissions changes and smaller global O3 burden responses, in addition to differences in the representation of NMVOCs and oxidation chemistry among models. Accounting for a fuller set of RF contributions may change the relative magnitude of each region's impacts. The large variability in the RF and GWP of NMVOCs among regions suggest that regionally specific metrics may be necessary to include NMVOCs in multi-gas climate trading schemes.
Leggett-Garg inequalities with deformed Pegg-Barnett phase observables
Creators: name: Azuma, Hiroo
name: Munro, William J.
name: Nemoto, Kae
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the Leggett-Garg inequalities (LGIs) for a boson system whose observables are given by deforming the Pegg-Barnett phase operators. We consider two observables and show that the quantum Fourier transform is useful in the realization of the required measurements. Deriving explicit forms for the LGIs using the coherent state $|α\rangle$ as the initial state, we explore the regimes where they are violated when the time difference between observations of the phase operators is varied. We show that the system remains nonclassical in the large amplitude limit without dissipation, however with dissipation, our violation diminishes rapidly.
description: 20 pages, 10 eps figures, latex2e; v2: minor clarifications, 10 references added, figures improved
Effect of regional precursor emission controls on long-range ozone transport – Part 2: Steady-state changes in ozone air quality and impacts on human mortality
Creators: name: Naik, V.
name: Horowitz, L. W.
name: Fiore, A. M.
name: West, J. J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: Large-scale changes in ozone precursor emissions affect ozone directly in the short term, and also affect methane, which in turn causes long-term changes in ozone that affect surface ozone air quality. Here we assess the effects of changes in ozone precursor emissions on the long-term change in surface ozone via methane, as a function of the emission region, by modeling 10% reductions in anthropogenic nitrogen oxide (NOx) emissions from each of nine world regions. Reductions in NOx emissions from all world regions increase methane and long-term surface ozone. While this long-term increase is small compared to the intra-regional short-term ozone decrease, it is comparable to or larger than the short-term inter-continental ozone decrease for some source-receptor pairs. The increase in methane and long-term surface ozone per ton of NOx reduced is greatest in tropical and Southern Hemisphere regions, exceeding that from temperate Northern Hemisphere regions by roughly a factor of ten. We also assess changes in premature ozone-related human mortality associated with regional precursor reductions and long-range transport, showing that for 10% regional NOx reductions, the strongest inter-regional influence is for emissions from Europe affecting mortalities in Africa. Reductions of NOx in North America, Europe, the Former Soviet Union, and Australia are shown to reduce more mortalities outside of the source regions than within. Among world regions, NOx reductions in India cause the greatest number of avoided mortalities per ton, mainly in India itself. Finally, by increasing global methane, NOx reductions in one hemisphere tend to cause long-term increases in ozone concentration and mortalities in the opposite hemisphere. Reducing emissions of methane, and to a lesser extent carbon monoxide and non-methane volatile organic compounds, alongside NOx reductions would avoid this disbenefit.
Evaluation of simulated photochemical partitioning of oxidized nitrogen in the upper troposphere
Creators: name: Henderson, B. H.
name: Vizuete, W.
name: Mathur, R.
name: Goliff, W. S.
name: Pinder, R. W.
name: Cohen, R. C.
name: Crooks, J.
name: Sarwar, G.
name: Hutzell, W. T.
name: Fahr, A.
name: Carlton, A. G.
name: Stockwell, W. R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Regional and global chemical transport models underpredict NOx (NO + NO2) in the upper troposphere where it is a precursor to the greenhouse gas ozone. The NOx bias has been shown in model evaluations using aircraft data (Singh et al., 2007) and total column NO2 (molecules cm−2) from satellite observations (Napelenok et al., 2008). The causes of NOx underpredictions have yet to be fully understood due to the interconnected nature of simulated emission, transport, and chemistry processes. Recent observation-based studies, in the upper troposphere, identify chemical rate coefficients as a potential source of error (Olson et al., 2006; Ren et al., 2008). Since typical chemistry evaluation techniques are not available for upper tropospheric conditions, this study develops an evaluation platform from in situ observations, stochastic convection, and deterministic chemistry. We derive a stochastic convection model and optimize it using two simulated datasets of time since convection, one based on meteorology, and the other on chemistry. The chemistry surrogate for time since convection is calculated using seven different chemical mechanisms, all of which predict shorter time since convection than our meteorological analysis. We evaluate chemical simulations by inter-comparison and by pairing results with observations based on NOx:HNO3, a photochemical aging indicator. Inter-comparison reveals individual chemical mechanism biases and recommended updates. Evaluation against observations shows that all chemical mechanisms overpredict NOx removal relative to long-lived methanol and carbon monoxide. All chemical mechanisms underpredict observed NOx by at least 30%, and further evaluation is necessary to refine simulation sensitivities to initial conditions and chemical rate uncertainties.
Impacts of global, regional, and sectoral black carbon emission reductions on surface air quality and human mortality
Creators: name: Arunachalam, S.
name: Anenberg, S. C.
name: Talgo, K.
name: West, J. J.
name: Jang, C.
name: Dolwick, P.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: As a component of fine particulate matter (PM 2.5), black carbon (BC) is associated with premature human mor-tality. BC also affects climate by absorbing solar radiation and reducing planetary albedo. Several studies have exam-ined the climate impacts of BC emissions, but the associated health impacts have been studied less extensively. Here, we examine the surface PM 2.5 and premature mortality impacts of halving anthropogenic BC emissions globally and individ-ually from eight world regions and three major economic sec-tors. We use a global chemical transport model, MOZART-4, to simulate PM 2.5 concentrations and a health impact func-tion to calculate premature cardiopulmonary and lung can-cer deaths. We estimate that halving global anthropogenic BC emissions reduces outdoor population-weighted average PM 2.5 by 542 ng m −3 (1.8 %) and avoids 157 000 (95 % con-fidence interval, 120 000–194 000) annual premature deaths globally, with the vast majority occurring within the source region. Most of these avoided deaths can be achieved by halving emissions in East Asia (China; 54 %), followed by South Asia (India; 31 %), however South Asian emissions have 50 % greater mortality impacts per unit BC emitted than East Asian emissions. Globally, halving residential, indus-trial, and transportation emissions contributes 47 %, 35 %, and 15 % to the avoided deaths from halving all anthro-pogenic BC emissions. These contributions are 1.2, 1.2, and 0.6 times each sector's portion of global BC emissions, ow-ing to the degree of co-location with population globally. We find that reducing BC emissions increases regional SO 4 con-centrations by up to 28 % of the magnitude of the regional BC concentration reductions, due to reduced absorption of radiation that drives photochemistry. Impacts of residential BC emissions are likely underestimated since indoor PM 2.5 Correspondence to: J. J. West (jjwest@email.unc.edu) exposure is excluded. We estimate ∼8 times more avoided deaths when BC and organic carbon (OC) emissions are halved together, suggesting that these results greatly under-estimate the full air pollution-related mortality benefits of BC mitigation strategies which generally decrease both BC and OC. The choice of concentration-response factor and health effect thresholds affects estimated global avoided deaths by as much as 56 % but does not strongly affect the regional distribution. Confidence in our results would be strength-ened by reducing uncertainties in emissions, model param-eterization of aerosol processes, grid resolution, and PM 2.5 concentration-mortality relationships globally.
Predictions for the $Λ_b \to J/ψ~ Λ(1405)$ decay
Creators: name: Roca, Luis
name: Mai, Maxim
name: Oset, Eulogio
name: Meißner, Ulf-G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the shape of the $πΣ$ and $\bar K N$ invariant mass distributions in the $Λ_b \to J/ψ\, πΣ$ and $Λ_b \to J/ψ\,\bar K N$ decays that are dominated by the $Λ(1405)$ resonance. The weak interaction part is the same for both processes and the hadronization into the different meson-baryon channels in the final state is related by SU(3) symmetry. The most important feature is the implementation of the meson-baryon final-state interaction using two chiral unitary models from different theoretical groups. Both approaches give a good description of antikaon-nucleon scattering data, the complex energy shift in kaonic hydrogen and the line shapes of $πΣK$ in photoproduction, based on the two-pole scenario for the $Λ(1405)$. We find that this reaction reflects more the higher mass pole and we make predictions of the line shapes and relative strength of the meson-baryon distributions in the final state.
description: 9 pages, 4 figures
Trophic tracers quantification and statistical analyses from Progressive ontogenetic niche shift over the prolonged immaturity period of wandering albatrosses
Creators: name: Carravieri, Alice
name: Weimerskirch, Henri
name: Bustamante, Paco
name: Cherel, Yves
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: 1) Stable isotopes and mercury analytical quantification in blood and feathers, and 2) statistical analyses
Ideograph: A Language for Expressing and Manipulating Structured Data
Creators: name: Mell, Stephen
name: Bastani, Osbert
name: Zdancewic, Steve
Publisher: name: arXiv
Year: 2023
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: We introduce Ideograph, a language for expressing and manipulating structured data. Its types describe kinds of structures, such as natural numbers, lists, multisets, binary trees, syntax trees with variable binding, directed multigraphs, and relational databases. Fully normalized terms of a type correspond exactly to members of the structure, analogous to a Church-encoding. Moreover, definable operations over these structures are guaranteed to respect the structures' equivalences. In this paper, we give the syntax and semantics of the non-polymorphic subset of Ideograph, and we demonstrate how it can represent and manipulate several interesting structures.
description: In Proceedings TERMGRAPH 2022, arXiv:2303.14219
transomics2cytoscape: a Bioconductor package for Trans-Omic 2.5D visualization
Creators: name: Nishida, Kozo
name: Yugi, Katsuyuki
Publisher: name: F1000 Research Limited
Year: 2020

description: Visualization of large-scale networks is a central technology that supports the interpretation and understanding of 'omics' data. Several network visualization software has been developed thus far, such as VANTED for visualization of metabolome data and Cytoscape for protein-protein interaction network structure. One of the authors of this study, Yugi, published a paper in 2014 that integrated phosphoproteome and metabolome data, thereby reconstructing and visualizing a multi-layered pathway of insulin action. This poster provides the outline and usage of a Bioconductor package “transomics2cytoscape” that facilitates visualization of such multi-layered pathways. Future developments as a Bioconductor package are also introduced.

Yugi's principle in visualizing multi-layered pathways is (1) to keep the conventional pathway network layouts and (2) to stack the pathways in line with omic layers that the pathways belong to. The first item, 'to keep the conventional pathway network layouts' means for example not to make the TCA cycle in a hair ball but keep the topology of the pathway as conventionally shared by the research community of metabolism (See KEGG for conventional layouts of the metabolic pathways). The second item, 'to stack the pathways in line with omic layers that the pathways belong to' means to place each pathway in the most closely related omic layer, and show the omic layers as tiered planes. Based on these two principles, the paper by Yugi et al. placed the signal transduction networks (phosphoproteome) layer at the top and the metabolism layer (metabolome) at the bottom. The stacked layers are connected together with vertical trans-omic interaction edges. Stacking layers is termed '2.5D visualization' in the visualization field.

 We have packaged Yugi’s visualization workflow in transomics2cytoscape that automates Yugi’s 2.5D visualization. This package requires two files for the input: pathway networks of each layer and edges connecting the layers. The package transomics2cytoscape interprets these two input files with the support of extensions of a network visualization software Cytoscape and several R packages, and eventually shows a 2.5D network file via Cytoscape.

Transomics2cytoscape is available from https://www.bioconductor.org/packages/devel/bioc/html/transomics2cytoscape.html
A universe born in a metastable false vacuum state needs not die
Creators: name: Urbanowski, K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We try to find conditions, the fulfillment of which allows a universe born in a metastable false vacuum state to survive and not to collapse. The conditions found are in the form of inequalities linking the depending on time $t$ instantaneous decay rate ${\itΓ}(t)$ of the false vacuum state and the Hubble parameter $H(t)$. Properties of the decay rate of a quantum metastable states are discussed and then the possible solutions of the conditions found are analyzed and discussed. Within the model considered it is shown that a universe born in the metastable vacuum state has a very high chance of surviving until very late times if the lifetime, $τ_{0}^{F}$, of the metastable false vacuum state is much shorter, than the duration of the inflation process. Our analysis shows that the instability of the electroweak vacuum does not have to result in the tragic fate of our Universe leading to its death.
description: 13 pages, 7 figures; some typos corrected, comments and references added, accepted by the European Physical Journal C. arXiv admin note: text overlap with arXiv:2110.11957
Read online: Emotions : enquête et mode d'emploi Tome 2
Creators: name: Cray
Publisher: name: Zenodo
Year: 2024

description: Emotions : enquête et mode d'emploi Tome 2 pan Art-mella

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Emotions : enquête et mode d'emploi Tome 2

Art-mella

Nb. de pages: 48

Format: Pdf, ePub, MOBI, FB2

ISBN: 9782371761278

Editeur: Pourpenser (Editions)

Date de parution: 2020

 

 

 

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Overview

Dans le premier tome de cette série, Art-mella s'est intéressée à la nature des émotions. A travers l'enquête menée en compagnie de Rator nous avons découvert la boussole des émotions, le triangle des Bermudes multitemporel et dégusté les biscuits de la pleine conscience ! La suite de cette enquête nous invite à visiter notre jardin intérieur et à remonter à la source de nos émotions. Le jardinage et les arts-martiaux réservent quelquefois des surprises... Comme bien des voyages, c'est en cheminant que l'on s'aperçoit que le paysage est encore plus riche.