Título: Independencia entre operaciones aritméticas básicas: evidencia desde la neuropsicología cognitiva. Resumen: Los casos descritos en la literatura ponen de manifiesto que las operaciones aritméticas pueden funcionar independientemente, lo que permite inferir que los procesos cognitivos implicados en las distintas operaciones podrían ser distintos. El objetivo de este trabajo es determinar...

A dependence of the isobaric ratio Y(3H)/Y(3He) on the N/Z ratio of the reconstructed quasiprojectile for the reaction of 28Si beam with 112,124Sn targets at two different projectile energies of 30 and 50 MeV/nucleon is presented. We demonstrate a linear dependence of the observable ln(Y(3H)/Y(3He)) on the N/Z ratio of the quasiprojectile and show the dependence of the slope on the reconstructe...

Let X and Y be proper birational varieties, say with only rational double points over a perfect field k of positive characteristic. If X lifts to Wn(k), is it true that Y has the same lifting property? This is true for smooth surfaces, but we show by example that this is false for smooth varieties in higher dimension, and for surfaces with canonical singularities. We also answer a stacky analog...

The main result of this paper is a generalization of the property that, for smooth u, uxy = 0 implies (*) u(x, y) = a(x) + b(y). Any function having generalized unsymmetric mixed partial derivative identically zero is of the form (*). There is a function with generalized symmetric mixed partial derivative identically zero not of the form (*), but (*) does follow here with the additional assumpt...

Massive palindromes in the human Y chromosome harbor mirror-image gene pairs essential for spermatogenesis. During evolution, these gene pairs have been maintained by intrapalindrome, arm-to-arm recombination. The mechanism of intrapalindrome recombination and risk of harmful effects are unknown. We report 51 patients with isodicentric Y (idicY) chromosomes formed by homologous crossing over be...

Many large double-stranded DNA viruses employ high force-generating ATP-driven molecular motors to package to high density their genomes into empty procapsids. Bacteriophage T4 DNA translocation is driven by a two-component motor consisting of the procapsid portal docked with a packaging terminase-ATPase. Fluorescence resonance energy transfer and fluorescence correlation spectroscopic (FRET-FC...

In the male mouse the X and Y chromosomes pair and recombine within the small pseudoautosomal region. Genes located on the unsynapsed segments of the X and Y are transcriptionally silenced at pachytene by Meiotic Sex Chromosome Inactivation (MSCI). The degree to which MSCI is conserved in other vertebrates is currently unclear. In the female chicken the ZW bivalent is thought to undergo a trans...

necrosectomy and a Roux−en−Y anasto− mosis. Before surgery the patient had un− dergone an endoscopic retrograde chol− angiopancreatography (ERCP) with bili− ary stent placement, but this stent could not be removed intra−operatively. ERCP was carried out using the Fujinon dou− ble−balloon enteroscope (EN−450T5I, Fu− jinon, Saitama, Japan). For the ERCP we did not place a balloon on the tip of th...

BACKGROUND Chile has probably experienced Latin America's fastest nutritional transition, as evidenced by very low rates of stunting, but the country shows a high prevalence of obesity in most population groups. OBJECTIVE The aim was to assess the existence of a double burden of nutritional problems in Chile on the basis of available data. DESIGN Secondary analyses were conducted on data co...

Truncated Power Series technique (Differential Algebra or DA) is a powerful tool for non-linear map analysis of accelerators. The most natural language for numerical DA’s is C++, since it is object oriented and has operator overloading. Traditional C++, though, can be inefficient for scientific programming due to creation of many temporaries and extra loops in overloaded operators. Recent Expre...