Colonia Cuauhtemoc, Mexico
Colonia Cuauhtemoc, Mexico
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Salgado O.S.,Mexicana University | Payares J.L.L.,National Autonomous University of Mexico | Gonzalez M.A.,National Autonomous University of Mexico
Archivos de Neurociencias | Year: 2016

This review was made in two parts, the first one talks about the theories are involved in the physiopathology of idiopathic normal pressure hydrocephalus whose importance suggests as one of the main, is the involvement and disturbance in the hydrodynamic system whose components alter the regulatory mechanisms of the homeostasis which are described in the Monroe Kelly law and Windkessel phenomenon. By destabilizing these mechanisms of homeostasis the most affected parameter it's the mechanism of compliance, this ensures regular forces of systole / diastole creating no fluctuations between them and thus providing adequate cerebral perfusion not fluctuate. Once altered the mechanism of compliance, alterations appear in the hydrodynamic system as the venous pressure increase in the Superior Sagittal Sinus (SSS), affecting the drain of the cerebrospinal fluid (CSF), so the compliance, not just give us a damping system and distribution of the forces and bring an adequate laminar blood flow, it's also involved in the proper control of the entry and exit of blood flow in the brain and in the proper absorption of CSF and blood flow perfusion cerebral. The limitations in our review have been made by the methodology we used finding the bibliography, those were mainly made using pubmed by the following mesh terms: Normal Pressure Hydrocephalus, Hydrodinamics, Compliance, Phisiopathology, Windkessel.

Leyva J.A.L.,Research Center Cientifica Educacion | Mondragon A.A.,Research Center Cientifica Educacion | Garcia E.,Autonomous University of Baja California | Mendieta F.J.,Mexicana University | And 2 more authors.
Optical Engineering | Year: 2012

We describe a homodyne optical Costas loop receiver intended to detect weak coherent states with diffused phase and suppressed carrier phase modulation. In order to get the information contained in the quadrature components of the optical field, we implement an 8-port receiver operating at 1550 nm, based on the manipulation of the state of polarization of both the local oscillator and the data signal. Employing binary phase-shift keying, we make measurements in the time and frequency domain of the quantum noise and bit error rate using an optimum loop filter, and compare the performance of our receiver against the standard quantum limit for the simultaneous quadrature detection, considering both ideal conditions and the overall efficiency of our set up. © 2012 Society of Photo-Optical Instrumentation Engineers (SPIE).

Dominguez-Serna F.A.,Research Center Cientifica Educacion Superior Of Ensenada | Mendieta-Jimenez F.J.,Mexicana University | Rojas F.,National Autonomous University of Mexico
Quantum Information Processing | Year: 2016

We study the degree of entanglement of arbitrary superpositions of m, n photon-added coherent states (PACS) (Formula presented.) using the concurrence and obtain the general conditions for maximal entanglement. We show that photon addition process can be identified as an entanglement enhancer operation for superpositions of coherent states (SCS). Specifically for the known bipartite positive SCS: (Formula presented.) whose entanglement tends to zero for (Formula presented.), can be maximal if al least one photon is added in a subsystem. A full family of maximally entangled PACS is also presented. We also analyzed the decoherence effects in the entangled PACS induced by a simple depolarizing channel . We find that robustness against depolarization is increased by adding photons to the coherent states of the superposition. We obtain the dependence of the critical depolarization (Formula presented.) for null entanglement as a function of (Formula presented.) and (Formula presented.). © 2016 Springer Science+Business Media New York

Ramirez-Velez G.,Hospital Of Especialidades | Medina F.,Hospital Of Especialidades | Medina F.,Mexicana University | Ramirez-Montano L.,Hospital Of Especialidades | And 5 more authors.
PLoS ONE | Year: 2012

Background: Overexpression of type I interferon (IFN-I)-induced genes is a common feature of systemic lupus erythematosus (SLE) and its experimental models, but the participation of endogenous overproduction of IFN-I on it is not clear. To explore the possibility that abnormally increased IFN-I receptor (IFNAR) signaling could participate in IFN-I-induced gene overexpression of SLE, we examined the phosphorylation status of the IFNAR-associated signaling partners Jak1 and STAT2, and its relation with expression of its physiologic inhibitor SOCS1 and with plasma levels of IFNα and IFN-like activity. Methodology/Principal Findings: Peripheral blood mononuclear cells (PBMC) from SLE patients with or without disease activity and healthy controls cultured in the presence or in the absence of IFNβ were examined by immunoprecipitation and/or western blotting for expression of the two IFNAR chains, Jak1, Tyk2, and STAT2 and their phosphorylated forms. In SLE but not in healthy control PBMC, Jak1 and STAT2 were constitutively phosphorylated, even in the absence of disease activity (basal pJak1: controls vs. active SLE p<0.0001 and controls vs. inactive SLE p = 0.0006; basal pSTAT2: controls vs. active and inactive SLE p<0.0001). Although SOCS1 protein was slightly but significantly decreased in SLE in the absence or in the presence of IFNβ (p = 0.0096 to p<0.0001), in SOCS1 mRNA levels were markedly decreased (p = 0.036 to p<0.0001). IFNβ induced higher levels of the IFN-I-dependent MxA protein mRNA in SLE than in healthy controls, whereas the opposite was observed for SOCS1. Although there was no relation to increased serum IFNα, active SLE plasma could induce expression of IFN-dependent genes by normal PBMC. Conclusions/Significance: These findings suggest that in some SLE patients IFN-I dependent gene expression could be the result of a low IFNAR signaling threshold. © 2012 Ramírez-Vélez et al.

Garcia E.,Autonomous University of Baja California | Lopez J.A.,CICESE | Alvarez E.,Autonomous University of Baja California | Mendieta F.J.,Mexicana University | Arvizu A.,CICESE
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

In order to asses free space optical links, using a Cassegrain telescope, for both classical (i.e. coherent and direct detection) and quantum (coherent, Dolinar-Kennedy system) several scenarios were analyzed. This analysis was conducted through a software tool that uses some specific parameters imposed by the environmental condition and hardware used, such as: pointing and tracking errors, turbulence, modulations schemes, and visibility, among others; in order to obtain the general performance parameters of the simulated link, such as: bit error rate and the photons number. The software developed allows the user to produce useful way to assess the possible success of the implementation of the free space optical link, or a way to identify phenomena that might suggest hardware adjustments to improve the overall performance of the system. Results allow the revision of the expected link performance for a quantum key distribution system; although it is possible to use it for general optical quantum communications systems. © 2013 SPIE.

Introduction. Stroke is the most común disabling neurologic disease. It is the third leading cause of death after heart disease and cancer. The requisition in nutrition to the patients con haemorrhage of the brain is differente in each patology. The proteins are a very important composition of the organism adn its measurement with albúmina and ureic nitrogen help us to nourish to our patient. Objetive. Evaluate the requisition nutriotonal in patients with traumatic brain haemorrhage and atraumatic brain haemorrhage. Method. We quantize the nivels of albumin and ureic nitrogen in patients with traumatic brain haemorrhage and atraumatic brain the seventh day with the purpose of observing their difference. Results. Patients with traumatic Brain Haemorrhage loose more ureic nitrogen in 24 hours urine recolectation and there isnt differences in albumin leves between both groups. Conclusion. Mayor necesity of nutritional support and energetic requisition was confirmed in traumatic brain haemorrhage patients compared to those with not traumatic brain haemorrhage.

Garcia E.,Autonomous University of Baja California | Mendieta F.J.,Mexicana University | Lopez J.A.,CICESE | Alvarez E.,Autonomous University of Baja California | And 2 more authors.
Microwave and Optical Technology Letters | Year: 2013

We present an eight-port homodyne receiver implemented in free space technology for detection of weak coherent states that carry binary information. For transmitted power economy, we use suppressed-carrier modulation, therefore, we have implemented an optical Costas-loop-type carrier synchronizer. We obtain the quasiprobability Q function from the in-phase and quadrature observables that are simultaneously measured. Statistical results for the quadrature components are presented. We perform measurements for the bit error rate and the mutual information between transmitter-receiver. The results show that the proposed setup is suitable in quantum communications and continuous variable quantum key distribution systems. Copyright © 2013 Wiley Periodicals, Inc.

Lopez J.A.,CICESE | Garcia E.,UABC | Arvizu A.,CICESE | Mendieta F.J.,Mexicana University | And 2 more authors.
Microwave and Optical Technology Letters | Year: 2013

A free-space experimental set-up for measuring the quadrature components of weak-coherent-state laser signals, based on a homodyne Costas loop configuration is presented. Loop parameters are optimized as a trade-off between quantum and phase noises. Using binary phase-shift-keying modulation, measurements on the mutual information are presented for different photon numbers and phase errors. © 2012 Wiley Periodicals, Inc.

Mexicana University | Entity website

Perfil del Egresado El Licenciado en Administracin de Empresas Tursticas podr desempearse en niveles gerenciales para la direccin, planeacin, coordinacin, control y desarrollo de proyectos de organizaciones tursticas en sus diferentes niveles; identificar y formular soluciones a problemas en el mbito hotelero y restaurantero para el logro de los objetivos organizacionales. As mismo, podr sistematizar procesos para mejorar la calidad de los servicios ...

Mexicana University | Entity website

PROCESO DE TITULACIN Cuando termines tu Licenciatura en la Universidad Mexicana podrs elegir alguna de nuestras opciones de titulacin, pero debers tener acreditadas al 100% todas tus materias y nosotros contar con tu documentacin completa. Estudios de Posgrados en otras Instituciones ...

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