Search results for "102"
showing 10 items of 2892 documents
Comparison of Reported Deaths From COVID-19 and Increase in Total Mortality in Italy
2020
This analysis compares reported deaths from COVID-19, February 23 to April 4, 2020, and total mortality in Italy from January 12 through April 4 in the years 2015 through 2020.
Brauer correspondent blocks with one simple module
2019
One of the main problems in representation theory is to understand the exact relationship between Brauer corresponding blocks of finite groups. The case where the local correspondent has a unique simple module seems key. We characterize this situation for the principal p-blocks where p is odd.
The average element order and the number of conjugacy classes of finite groups
2021
Abstract Let o ( G ) be the average order of the elements of G, where G is a finite group. We show that there is no polynomial lower bound for o ( G ) in terms of o ( N ) , where N ⊴ G , even when G is a prime-power order group and N is abelian. This gives a negative answer to a question of A. Jaikin-Zapirain.
The proof of Birman’s conjecture on singular braid monoids
2003
Let B_n be the Artin braid group on n strings with standard generators sigma_1, ..., sigma_{n-1}, and let SB_n be the singular braid monoid with generators sigma_1^{+-1}, ..., sigma_{n-1}^{+-1}, tau_1, ..., tau_{n-1}. The desingularization map is the multiplicative homomorphism eta: SB_n --> Z[B_n] defined by eta(sigma_i^{+-1}) =_i^{+-1} and eta(tau_i) = sigma_i - sigma_i^{-1}, for 1 <= i <= n-1. The purpose of the present paper is to prove Birman's conjecture, namely, that the desingularization map eta is injective.
Automorphisms of 2–dimensional right-angled Artin groups
2007
We study the outer automorphism group of a right-angled Artin group AA in the case where the defining graph A is connected and triangle-free. We give an algebraic description of Out.AA/ in terms of maximal join subgraphs in A and prove that the Tits’ alternative holds for Out.AA/. We construct an analogue of outer space for Out.AA/ and prove that it is finite dimensional, contractible, and has a proper action of Out.AA/. We show that Out.AA/ has finite virtual cohomological dimension, give upper and lower bounds on this dimension and construct a spine for outer space realizing the most general upper bound. 20F36; 20F65, 20F28
Validation of eating habits subscale in children (sehan: spanish version) from 10 to 12 years.
2015
Introducción: Es necesario identificar hábitos alimentarios de riesgo para frenar el aumento de la prevalencia del sobrepeso infantil y garantizar el derecho a la salud del niño. Para ello, se requiere el uso de instrumentos validados en contextos escolares y familiares. Objetivo: Validar una Subescala de Hábitos Alimentarios en Niños (SEHAN), para su uso en escolares españoles entre 10 y 12 años. Método: Las propiedades psicométricas de la SEHAN se estudiaron en 3 apartados: Validez y lógica del instrumento, fiabilidad y consistencia interna, y validez criterial. En el primer apartado participó un grupo de 5 expertos, que valoró la suficiencia, claridad, coherencia y relevancia del instrum…
Evaluación de la eficacia de tres técnicas analgésicas, analgesia epidural, bloqueo femoral continuo y doble bloqueo femoral y ciático continuos en l…
2015
La artroplastia total de rodilla es una intervención quirúrgica que se realiza en pacientes afectos de gonartrosis avanzada que cursa con dolor e impotencia funcional significativa. La mayoría de pacientes tienen más 65 años y presentan frecuentemente patología asociada. El dolor postoperatorio que aparece como consecuencia de la agresión quirúrgica es de intensidad moderada-severa, se inicia en las 3-6 primeras horas, prolongándose hasta las 24h y es a partir de este momento cuando comienza a atenuarse paulatinamente. Una terapeútica analgésica apropiada presenta muchos beneficios. En primer lugar aumenta el confort del paciente sobre todo en el postoperatorio inmediato y disminuye la inci…
Ethnic differences in serum lipoproteins and their determinants in South African women
2010
205th ENMC International Workshop: Pathology diagnosis of idiopathic inflammatory myopathies Part II 28-30 March 2014, Naarden, The Netherlands.
2015
The idiopathic inflammatory myopathies (IM) are a heterogeneous group of diseases and diagnosis often necessitates a muscle biopsy. Five main entities are recognized: (1) dermatomyositis (DM); (2) polymyositis (PM); (3) necrotizing autoimmune myopathy (NAM); (4) sporadic inclusion body myositis (IBM); and (5) non-specific myositis. Other entities include granulomatous myopathy, macrophagic myofasciitis, and eosinophilic fasciitis (Shulman's syndrome). The pathological classification and subsequent identification of disease subgroups are extremely important for assessing treatment options and prognosis in the individual patient, yet classification criteria have not been standardized and vali…
Layer-Specific Refinement of Sensory Coding in Developing Mouse Barrel Cortex
2017
Rodent rhythmic whisking behavior matures during a critical period around 2 weeks after birth. The functional adaptations of neocortical circuitry during this developmental period remain poorly understood. Here, we characterized stimulus-evoked neuronal activity across all layers of mouse barrel cortex before, during, and after the onset of whisking behavior. Employing multi-electrode recordings and 2-photon calcium imaging in anesthetized mice, we tested responses to rostro-caudal whisker deflections, axial "tapping" stimuli, and their combination from postnatal day 10 (P10) to P28. Within this period, whisker-evoked activity of neurons displayed a general decrease in layer 2/3 (L2/3) and …