Search results for " Asymmetry"

A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target

2007

New high precision measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarised 6LiD target are presented. The data were taken in 2003 and 2004 with the COMPASS spectrometer using the muon beam of the CERN SPS at 160 GeV/c. Both the Collins and Sivers asymmetries turn out to be compatible with zero, within the present statistical errors, which are more than a factor of 2 smaller than those of the published COMPASS results from the 2002 data. The final results from the 2002, 2003 and 2004 runs are compared with naive expectations and with existing model calculations.

Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p → + p → collisions at s =200GeV

2014

Abstract: Results are presented from data recorded in 2009 by the PHENIX experiment at the Relativistic Heavy Ion Collider for the double-longitudinal spin asymmetry, A LL , for π 0 and η production in ffiffiffi s p ¼ 200 GeV polarized p þ p collisions. Comparison of the π 0 results with different theory expectations based on fits of other published data showed a preference for small positive values of gluon polarization, Δ G , in the proton in the probed Bjorken x range. The effect of adding the new 2009 π 0 data to a recent global analysis of polarized scattering data is also shown, resulting in a best fit value Δ G ½ 0 . 05 ; 0 . 2 DSSV ¼ 0 . 06 þ 0 . 11 − 0 . 15 in the range 0 . 05 <x< …

Explaining a Surge in IPR Filings: Uncertain Design Rights and Learning Their Boundaries in the Finnish Sauna Heater Market

2017

We present a case study of a surge in design right filings in an industry transforming from technology-based to design-based competition. The motives for and outcomes of filing, and how these changed over time are discussed. We go on to explore the events, which offered the agents opportunities to update their beliefs about the scope of design right protection. We find that filing motives change from specific protection goals to freedom to operate over time. We also find that the actors faced several, but sometimes contradictory, learning opportunities. Finally, we argue that uncertain design rights may have fostered entrepreneurial optimism. Policy makers could level the playing field and …

Measurement of the forward-backward asymmetry of e(+)e(-)-]z-]b(b)over-bar using prompt leptons and a lifetime tag

1995

The forward-backward asymmetry of the process e+e-→Z→b {Mathematical expression} has been measured using events collected by the DELPHI experiment during the 1991 and 1992 LEP runs. This data sample corresponded to 884 000 hadronic Z decays at a centre-of-mass energy {Mathematical expression}. The tagging of b-quark events was performed using two approaches; the first was based on the semileptonic decay channels b→X+μ and b→X+e, the second used a lifetime tag with jet-charge reconstruction. The results of these two methods were combined to give {Mathematical expression} With the semileptonic sample, the forward-backward asymmetry of the process e+e-→Z→ {Mathematical expression} was also mea…

Endogenous asymmetry and cooperative R&D in linear duopoly with spillovers

2009

In a standard model of R&D followed by linear Cournot competition, firm asymmetry is sustainable as equilibrium with non cooperative R&D if and only if the productivity of research is sufficiently large relative to the benefits of imitation. Increasing spillovers distribute R&D results among asymmetric competitors, causing price, firm asymmetry, and joint profit to reduce. With zero spillovers, a symmetric joint lab dominates asymmetric R&D competition in terms of social welfare and consumer surplus, but is sometimes dominated in terms of joint profit. Raising spillovers encourage symmetric collusion but makes the latter potentially harmful to consumers. (JEL : C72; L13; O32).

Labor Productivity and Okun’s law: An empirical application to Italian regional panel data

2012

Okun’s law, named for its proposer, Arthur Okun, was first applied during the 1960s in the USA to describe the relationship between economic growth and unemployment fluctuations. Several attempts were later made to test the empirical applicability of the relationship to different countries and historical periods. Heterogeneous results were generally found in estimating Okun’s coefficient, depending on the sample and context analysed. The main goal of this paper is to analyze the relevance of Okun’s law to Italian regions. We perform a panel analysis to estimate the influence of asymmetry and local market differences on Okun’s relationship. Moreover, observing particularly low values of part…

Asimmetrie cerebrali e i centri del linguaggio nell'Uomo, nella Donna e nei Primati.

2008

Sviluppo e riduzione asimmetrica del cervello umano.

2011

Active unilateral condylar hyperplasia : assessment of the usefulness of single photon emission computed tomography

2020

[Background] This study aims to evaluate whether the uptake difference by the condyles evaluated using single photon emission computed tomography (SPECT) examination is useful for predicting the activity of the feature and the advance of this pathology.

Prognostic importance of DNA from human papillomavirus in patients with oral squamous cell carcinoma.

2021

Survival of patients with oral squamous cell carcinoma (OSCC) is generally low, with the likelihood of locoregional recurrence or disease progression (LR/DP). Knowledge of prognostic factors for survival is key to achieving an understanding and increased survival. The present study aimed to identify prognostic factors for patients with OSCC, especially the presence of DNA from human papillomavirus (HPV). Retrospective cohort study including 119 patients with OSCC treated at the National Cancer Institute in Mexico City (2009-2013). Clinical information was obtained from patient records including LR/DP. Formalin-fixed, paraffin-embedded tissues were obtained and used for detecting DNA from di…