Scaling Law Describes the Spin-Glass Response in Theory, Experiments, and Simulations.

The correlation length ξ, a key quantity in glassy dynamics, can now be precisely measured for spin glasses both in experiments and in simulations. However, known analysis methods lead to discrepancies either for large external fields or close to the glass temperature. We solve this problem by introducing a scaling law that takes into account both the magnetic field and the time-dependent spin-glass correlation length. The scaling law is successfully tested against experimental measurements in a CuMn single crystal and against large-scale simulations on the Janus II dedicated computer.

Analyzing the potential impact of BREXIT on the European research collaboration network.

In this work, we study the impact that the withdrawal of institutions from the United Kingdom caused by BREXIT has on the European research collaboration networks. To this aim, we consider BREXIT as a targeted attack to those graphs composed by the European institutions that have collaborated in research projects belonging to the three main H2020 programs (Excellent Science, Industrial Leadership, and Societal Challenges). The consequences of this attack are analyzed at the global, mesoscopic, and local scales and compared with the changes suffered by the same collaboration networks when a similar quantity of nodes is randomly removed from the network. Our results suggest that changes depend on the specific program, with Excellent Science being the most affected by BREXIT perturbation. However, the structure of the integrated collaboration network is not significantly affected by BREXIT compared to the variations observed after the random removal of institutions.

Aging Rate of Spin Glasses from Simulations Matches Experiments.

Experiments on spin glasses can now make precise measurements of the exponent z(T) governing the growth of glassy domains, while our computational capabilities allow us to make quantitative predictions for experimental scales. However, experimental and numerical values for z(T) have differed. We use new simulations on the Janus II computer to resolve this discrepancy, finding a time-dependent z(T,t_{w}), which leads to the experimental value through mild extrapolations. Furthermore, theoretical insight is gained by studying a crossover between the T=T_{c} and T=0 fixed points.

Distribution of IFITM3 polymorphism (dbSNP: rs12252) in mestizo populations in four states of Mexico.

Interferon-inducible transmembrane protein 3 (IFITM3) participates in the defense against viral infections. This study identified and compared the frequency of the IFITM3 rs12252 polymorphism in 410 individuals in western Mexico. The western Mexican allelic frequencies (frequency of the "C" allele = 0.18) differ from some American, East Asian and European populations.

Matching Microscopic and Macroscopic Responses in Glasses.

We first reproduce on the Janus and Janus II computers a milestone experiment that measures the spin-glass coherence length through the lowering of free-energy barriers induced by the Zeeman effect. Secondly, we determine the scaling behavior that allows a quantitative analysis of a new experiment reported in the companion Letter [S. Guchhait and R. Orbach, Phys. Rev. Lett. 118, 157203 (2017)].PRLTAO0031-900710.1103/PhysRevLett.118.157203 The value of the coherence length estimated through the analysis of microscopic correlation functions turns out to be quantitatively consistent with its measurement through macroscopic response functions. Further, nonlinear susceptibilities, recently measured in glass-forming liquids, scale as powers of the same microscopic length.

Quiste paraovárico gigante en la infancia: Reporte de un caso / Giant paraovarian cyst in childhood: Case report

Introducción: Los quistes paraováricos son de diagnóstico infrecuente en la edad pediátrica. Objetivos: Dar a conocer un caso clínico de quiste paraovárico gigante en la infancia y su manejo a través de una técnica laparoscópica modificada. Caso Clínico: Paciente de 13 años con cuadro de dolor abdominal intermitente de 15 días de evolución, localizado en el hemiabdomen izquierdo, asociado a aumento de volumen abdominal progresivo. Las imágenes diagnósticas no fueron concluyentes, describiendo una formación quística gigante que ocupaba todo el abdomen, sin precisar su origen. Exámenes de laboratorio y marcadores tumorales dentro de los parámetros normales. Se realizó quistectomía transumbilical videoasistida, un procedimiento laparoscópico modificado, con intención diagnóstica y terapéutica con resultado exitoso. Estudio histológico compatible con quiste paraovárico gigante. El examen citológico resultó negativo para células tumorales. La paciente permaneció asintomática durante el seguimiento postoperatorio. Conclusiones: La quistectomía transumbilical videoasistida es una técnica segura y constituye una excelente alternativa diagnóstica y terapéutica para el tratamiento de quistes paraováricos gigantes.

Introduction: Paraovarian cysts are very uncommon in children. Objective: To present a case of giant paraovarian cyst case in a child and its management using a modified laparoscopic-assisted technique. Case report: A 13-year-old patient with a 15 day-history of intermittent abdominal pain, located in the left hemiabdomen and associated with progressive increase in abdominal volume. Diagnostic imaging was inconclusive, describing a giant cystic formation that filled up the abdomen, but without specifying its origin. Laboratory tests and tumor markers were within normal range. Video-assisted transumbilical cystectomy, a modified laparoscopic procedure with diagnostic and therapeutic intent, was performed with a successful outcome. The histological study reported giant paraovarian cyst. Cytology results were negative for tumor cells. The patient remained asymptomatic during the postoperative follow-up. Conclusions: The video-assisted transumbilical cystectomy is a safe procedure and an excellent diagnostic and therapeutic alternative for the treatment of giant paraovarian cysts.

Dynamical transition in the D=3 Edwards-Anderson spin glass in an external magnetic field.

We study the off-equilibrium dynamics of the three-dimensional Ising spin glass in the presence of an external magnetic field. We have performed simulations both at fixed temperature and with an annealing protocol. Thanks to the Janus special-purpose computer, based on field-programmable gate array (FPGAs), we have been able to reach times equivalent to 0.01 s in experiments. We have studied the system relaxation both for high and for low temperatures, clearly identifying a dynamical transition point. This dynamical temperature is strictly positive and depends on the external applied magnetic field. We discuss different possibilities for the underlying physics, which include a thermodynamical spin-glass transition, a mode-coupling crossover, or an interpretation reminiscent of the random first-order picture of structural glasses.

Obstrucción intestinal por vólvulo de sigmoide / Intestinal obstruction by sygmoid volvulus

El vólvulo del sigmoides es una patología rara e infrecuente en niños y por lo tanto de baja sospecha y diagnóstico tardío. Puede ocurrir en distintos sitios del colon, siendo la forma de presentación mas frecuente a nivel del sigmoides (70 por ciento ). Se manifiesta como obstrucción intestinal baja (90 por ciento) y masas palpable (42 por ciento). Se describe asociación con retardo mental, E. de Hirschprung, sífilis congénita, constipación crónica y dieta rica en fibras (población africana). El diagnóstico se realiza por enema baritada, el que a su vez puede ser terapéutico si no existen complicaciones. Se describe cronicidad en algunos casos, con patrón de torsión y destorsión y vasos prominentes en la raíz de mesenterio que explicaría mayor resistencia a isquemia y necrosis. En casos específicos con necrosis delimitadas se describe anastomosis término terminal primaria. Se describe el único caso ocurrido en los últimos 15 años en el Servicio de Cirugía, Hospital Roberto del Río