2,809 research outputs found
Natural_SLH_impact_on_climate
No full textProcessed model dataset and post-processing/plotting scripts supporting the Article "Natural short-lived halogens exert an indirect cooling effect on climate" by Saiz-Lopez et al., 2023 are compiled here. The complete dataset generated during the current study is available from the corresponding author on reasonable request.European Research Council
ERC-2016-COG 726349 CLIMAHALPeer reviewe
Compendio de la doctrina regular y mistica, mas necesaria y util a los Frayles menores. Vol 1
No full textWrite it by superior mandate, for instruction of the novices, and address of the Professed in their Religious State E1 P. Retired Reader Fray Juan Sanz Lopez, minor son of the Province of Cartagena of the Regular Observance of Our Serafico P. S. Prancisco. Second impression. Corrected and added by its author. With license: in Madrid: in the press of Don Andres de Sotos. M.DCC.LXXXV. 1785Write it by superior mandate, for instruction of the novices, and address of the Professed in their Religious State E1 P. Retired Reader Fray Juan Sanz Lopez, minor son of the Province of Cartagena of the Regular Observance of Our Serafico P. S. Prancisco. Second impression. Corrected and added by its author. With license: in Madrid: in the press of Don Andres de Sotos. M.DCC.LXXXV. 178
Compendio de la doctrina regular y mistica, mas necesaria y util a los Frayles menores. Vol 2
No full textWrite it by superior mandate, for instruction of the novices, and address of the Professed in their Religious State E1 P. Retired Reader Fray Juan Sanz Lopez, minor son of the Province of Cartagena of the Regular Observance of Our Serafico P. S. Prancisco. Second impression. Corrected and added by its author. With license: in Madrid: in the press of Don Andres de Sotos. M.DCC.LXXXV. 1785Write it by superior mandate, for instruction of the novices, and address of the Professed in their Religious State E1 P. Retired Reader Fray Juan Sanz Lopez, minor son of the Province of Cartagena of the Regular Observance of Our Serafico P. S. Prancisco. Second impression. Corrected and added by its author. With license: in Madrid: in the press of Don Andres de Sotos. M.DCC.LXXXV. 178
Numerical and statistical analyses of aerodynamic characteristics of low Reynolds number airfoils using Xfoil and JMP
No full textLow Reynolds number aerodynamics has become a promising topic of interest in various commercial utilizations such as wind turbines. Airfoils employed for this type of application usually experience performance degradation due to separation bubble formation. This study intends to investigate the behavior and effect of such phenomena and analyze the interrelationship among the contributive factors affecting its existence using JMP, a statistical analysis tool, with numerical data generated from Xfoil, a collective program applicable for low-speed airfoils. Numerical results were validated against published experimental data and exhibited favorable agreement more specifically within the upper limits of the given Reynolds number range. Surface pressure and skin friction drag coefficient plots show that the bubble length tends to decrease as angle of attack, Reynolds number and turbulence intensity are increased. The abridgement of the bubble extent due to enhancement of flow instabilities is associated with increase lift-to-drag ratio which is more pronounced in the attached flow regions. The statistical technique yielded predictive models for multiple outcome variables and it was learned that the main effects had more significant influence on the aerodynamic properties of airfoils and chordwise extent of separation bubble. © 2017 Author(s)
Strange particle production in final states in collisions at TeV with the ATLAS detector at the LHC
No full textThe LHC has opened up a new era in particle physics in as much it paved the way for the discovery of the Higgs boson, the missing piece in the so called standard model (SM) , pushing the lower limits for particles predicted in many beyond the standard model (BSM) scenarios to values well above the TeV scale, allowing precision measurements at unprecedented energies. This ambitious scientific program has been carried out with the construction of two big multipurpose detectors: ATLAS and CMS. The discovery of the Higgs boson is, no doubt, one of the most important milestones in the history of particle physics. Another field where one can reach unprecedented precision is in the study of the top quark. With the advent of unprecedented statistics for top quark pair production, one can think of directly measuring the Cabibbo-Kobayashi-Maskawa matrix elements where the top quark is involved, in particular . Ali et al. [Phys. Lett. B 693 (2010) 44-51] made the proposal to determine this matrix element by discerning the signal final state from the dominant background process . This could be done by looking at neutral strange particle production which turns out to be leading in -quark jets while non-leading in -quark jets as -quarks decay sequentially . This proposal makes use of MVA techniques, with the possible existence of jet secondary vertices and soft leptons as additional variables with discriminant power. Therefore this proposal is dependent on the good agreement between data and Monte Carlo generators used in the training phase. However the proposal we refer to is qualitatively right, but quantitatively is somewhat overoptimistic as it is based on generator level data. The aim of the present thesis is twofold: on the one hand, as a continuation of the thesis presented in 2015 by Dr. Javier Llorente, who measured - and light-jet shapes in events, we have investigated the improvements in the performance of the MVA discussed above when adding the jet shapes as a discriminant variable. This was presented at ICHEP 2014 in Valencia, [Nucl. Part. Phys. Proc. 273-275 (2016) 2761-2763]. This is the basis for Chapter 4 in this thesis. On the other hand, we made use of the ATLAS data at 7 TeV taken in 2011, to study neutral strange particle production in the dileptonic final states. This study has been published in Eur. Phys. J. C 79 (2019) 1017. It is found that neutral strange particle production embedded in jets, -tagged or not, is well described by current MC models like the following generators: POWHEG+PYTHIA6, POWHEG+PYTHIA8, MC@NLO+HERWIG, POWHEG+HERWIG7, aMC@NLO+HERWIG7 or SHERPA. This lends support to the idea put forward by ABL that one could attempt to determine with a TMVA. Furthermore, neutral strange particles produced outside jets, the dominant contribution, in underestimated by current MC generators by 30 %. Thus, these data have the potential to help tune models for MPI. This is summarised in Chapter 5. For the sake of completeness and without any pretension to originality, the first three chapters are devoted to present the most relevant aspects of the SM, Chapter 1, the ATLAS detector and the LHC, Chapter 2, and the objects (leptons, jets, missing energy) reconstruction, Chapter 3
Gregorio Lopez y Fuentes and the Mexico of Today: A Novelist\u27s Portrayal of Current Problems
No full textThis is not what the Revolution wanted.
A hard-working, yet ill-rewarded Mexican labrador, rising from the pages of Gregorio Lopez y Fuentes\u27 Milpa, potrero y monte, speaks out. s his reaction to the problems and injustices which he must face sounds his judgment on life. For his criteria he takes the goals of the Mexican Revolution.
Thus, in this one poignant statement, the contemporary Mexican novelist Gregorio Lopez y Fuentes--like all his active, thinking, creative fellow-artists concentrates his total motivation, his purpose and his goal.
Today the Mexican author, the muralist, the composer, the sculptor--not to mention the politician, the industrialist, and the farmer--must face, and feels that it is his self-assigned task to express, his Mexico. His is not an idealized Mexico. It is far from being Utopia, but, though have faults as it may, he loves it with a concern and a zeal
Measurements of and production in dileptonic events in collisions at with the ATLAS detector.
No full textMeasurements of and production in final states have been performed. They are based on a data sample with integrated luminosity of 4.6 from proton--proton collisions at a centre-of-mass energy of 7 TeV, collected in 2011 with the ATLAS detector at the Large Hadron Collider. Neutral strange particles are separated into three classes, depending on whether they are contained in a jet, with or without a -tag, or not associated with a selected jet. The aim is to look for differences in their main kinematic distributions. A comparison of data with several Monte Carlo simulations using different hadronisation and fragmentation schemes, colour reconnection models and different tunes for the underlying event has been made. The production of neutral strange particles in dileptonic events is found to be well described by current Monte Carlo models for and production within jets, but not for those produced outside jets
Does strict employment protection discourage job creation? Evidence from Croatia
No full textEmployment protection legislation in Croatia is among the most strict in Europe. Firing is difficult and costly, and flexible forms of employment are limited. Is this apparent rigidity reflected-as one would expect based on standard economic theory-in low labor market dynamics? Is job creation low and hiring limited? Is the job security of insiders achieved at the cost of outsiders not being able to enter thelabor market? The author attempts to answer these questions by examining job flows. If the employment protection legislation is binding, then job and worker turnover should be low. He shows that this is indeed the case. Hiring is limited and the average job tenure is very long in Croatia. Job destruction is low, however job creation is still lower. The result is accumulation of unemployment, in large part due to new labor market entrants not being able to find a job. The high degree of job protection also seems to strengthen the bargaining position of insiders and results in relatively high wages. So, wages in Croatia are higher than among its competitors, even after adjusting for productivity. These high labor costs are likely to contribute to limited job creation in existing firms, but also are likely to discourage the entry of-and thus job creation in-new firms. The author presents evidence that firm growth has been indeed limited in Croatia, contributing to the low employment level. The author examines other potential causes of high unemployment in Croatia (the unemployment benefit system, labor taxation, the wage structure, and skill and spatial mismatches). He argues that they do not play a substantial part in accounting for poor labor market outcomes in Croatia. The author concludes that the stringent employment protection legislation is the key labor market institution behind low job creation and high unemployment. Based on this he recommends specific measures aimed at liberalizing the labor market to foster job creation and employment.Labor Management and Relations,Labor Policies,Labor Markets,Environmental Economics&Policies,Trade Finance and Investment,Labor Markets,Labor Management and Relations,Labor Standards,Banks&Banking Reform,Environmental Economics&Policies
Observations of Bºs→ψ(2S)η and Bº(s)→ψ(2S)π+π- decays
No full textFirst observations of the B0s
→ψ(2S)η, B0 →ψ(2S)π
+
π
− and B0s
→ψ(2S)π
+
π
− decays are made
using a dataset corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment in
proton–proton collisions at a centre-of-mass energy of
√
s = 7 TeV. The ratios of the branching fractions
of each of the ψ(2S) modes with respect to the corresponding J/ψ decays are
B(B0s
→ψ(2S)η)
÷
B(B0s
→J/ψη)
= 0.83± 0.14 (stat)±0.12 (syst) ±0.02 (B),
;
B(B0→ψ(2S)π
+
π
−
)
÷
B(B0→J/ψπ
+
π
−
)
= 0.56± 0.07 (stat)±0.05 (syst)± 0.01 (B),
;
B(B0s
→ψ(2S)π
+
π
−
)
÷
B(B0s
→J/ψπ
+
π
−
)
= 0.34± 0.04 (stat)±0.03 (syst)± 0.01 (B),
where the third uncertainty corresponds to the uncertainties of the dilepton branching fractions of the J/ψ
and ψ(2S) meson decays
Prompt charm production in pp collisions at √<span style="text-decoration:overline">s</span>=7 TeV
No full textCharm production at the LHC in pp collisions at s√=7 TeV is studied with the LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, D+s→ϕ(K−K+)π+, Λ+c→pK−π+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb−1. Differential cross-sections dσ/dpT are measured for prompt production of the five charmed hadron species in bins of transverse momentum and rapidity in the region 0<pT<8 GeV/c and 2.0<y<4.5. Theoretical predictions are compared to the measured differential cross-sections. The integrated cross-sections of the charm hadrons are computed in the above pT-y range, and their ratios are reported. A combination of the five integrated cross-section measurements gives
σ(cc¯)pT<8 GeV/c,2.0<y<4.5=1419±12(stat)±116(syst)±65(frag) μb,
where the uncertainties are statistical, systematic, and due to the fragmentation functions
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