Analytic and "frozen" QCD coupling constants up to NNLO from DIS data

Deep inelastic scattering data on the F_2 structure function provided by the BCDMS, SLAC and NMC collaborations are analyzed in the non-singlet approximation with the analytic and "frozen" modifications of the strong coupling constant featuring no unphysical singularity (the Landau pole). Improvement of agreement between theory and experiment, with respect to the case of the standard perturbative definition of alpha_s considered recently, is observed and the behavior of the higher twist terms in the next-to-next-to-leading-order is found to be confirming earlier studies on the subject.Comment: 22 pp, 8 fig

Contribution of Quark-Mass-Dependent Operators to Higher Twist Effects in DIS

We look at the contribution of Quark-Mass-dependent twist-4 operators to the second moments of spin averaged structure functions and the Bjorken sum rule. Its contribution is non-negligible in the former case due to large Wilson coefficients. We also discuss the values of the twist- 4 spin-2 nucleon matrix element within present experimental constraints.Comment: 14pages, RevTex, (To be published in Phys. Rev. D) University of Washington preprint DOE/ER/40427-22-N9

Effects of thermal neutron radiation on a hardware-implemented machine learning algorithm

International audienceHardware-implemented machine learning algorithms are finding their way in various domains, including safety-critical applications. This has demanded these algorithms to perform correctly even in harsh environmental conditions, such as in avionics altitudes. Support Vector Machine (SVM) is an important Machine Learning that has been target of hardware implementation in recent years. This is the first work to asses both Binary and Multiclass SVMs under thermal neutron radiation, a type of particle noticeably present in high altitudes. A fault injection campaign along with a radiation test with the D50 thermal neutron source, at the Intitut Laue-Languevin, has been performed. The results show a high intrinsic fault tolerance for both varieties of the SVM algorithm, especially for the Multiclass SVM

Aplicação da análise da conversa etnometodológica em entrevista de seleção: considerações sobre o gerenciamento de impressões Applying ethnomethodological conversation analysis to job interviews: considerations about impression management

A entrevista de seleção é descrita como um evento no qual indivíduos buscam controlar impressões que outros formam a seu respeito no que tange a comportamentos, crenças e atributos pessoais. Este artigo analisa aspectos interacionais que podem estar relacionados ao gerenciamento de impressões por parte do entrevistado em uma entrevista de seleção. Para tanto, uma entrevista de seleção foi gravada e transcrita, e utilizou-se a análise da conversa etnometodológica como instrumental analítico. A análise revela a assimetria de papéis discursivos entre entrevistado e entrevistador e para fenômenos interacionais que evidenciam o gerenciamento de impressão por parte do entrevistado: (1) aumento de velocidade de fala quando se refere à sua demissão ou a outro evento percebido como negativo; (2) co-construção de turnos como forma de o entrevistado antecipar que conhece os pontos apresentados pelo entrevistador; (3) explicações (accounts) como modo de o candidato prevenir inferências negativas a seu respeito.<br>Job interviews have been described as events in which individuals aim at managing the impressions others get from them with regards to one's attitudes, beliefs and personal character. This paper analyzes some interactional aspects that might be related to impression management by a candidate during a job interview. In order to accomplish that, a job interview was audiorecorded and transcribed, and the conversation analysis tools were used to analyze the data. The analysis shows the asymmetry of discursive roles between interviewee and interviewer and the interactional phenomena through which impression management is substantiated by the job candidate: (1) faster delivery of the speech when the candidate refers to being previously fired or to some other event which might be seen as negative; (2) turn co-construction as a way for the candidate to anticipate that he knows the aspects being discussed by the job interviewer; (3) explanations (accounts) as a way of preventing negative inferences about himself