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INTRODUCTION AND AIMS: Cadaveric donor liver graft retrieval is complex in Mexico. The aim of the present article was to present the experience in liver graft use during the first year of work of a local evaluation and procurement team. MATERIALS AND METHODS: We reviewed the organ donation report forms and allocation offer records covering the time frame of December 15, 2017 to December 15, 2018, and registered the donor characteristics, causes of organ discard, causes of declined offers, transport time, and graft and recipient survival at 30 days. RESULTS: There were 17 donations and we completed the evaluation of 14. Two donors were considered ideal (14.2%) and 12 were expanded criteria donors (ECDs) (85.7%). Two grafts with steatosis were not offered (14.2%). Twelve liver grafts were offered 88 times (mean 7.6 offers per graft). The acceptance rate was 6% for public hospitals and 23.6% for private hospitals (p = 0.016). One graft was discarded during the procurement process due to steatosis. The rate of use after evaluation was 78.5% (11/14). All the grafts were procured by the local team and 9 (81.8%) were transported by commercial airline (median 240 min, range 85 min). Graft and recipient survival at 30 days was 100%. CONCLUSIONS: The participation of a local evaluation and procurement team notably increased liver graft use with excellent results. Commercial airline transportation of the grafts to all active transplantation centers of the country resulted in cold ischemia times <6 h.

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It was recently found [Fujioka et al., Phys. Lett. A 374, 1126 (2010)] that the propagation of solitary waves can be described by a fractional extension of the nonlinear Schrödinger (NLS) equation which involves a temporal fractional derivative (TFD) of order α > 2. In the present paper, we show that there is also another fractional extension of the NLS equation which contains a TFD with α < 2, and in this case, the new equation describes the propagation of radiating solitons. We show that the emission of the radiation (when α < 2) is explained by resonances at various frequencies between the pulses and the linear modes of the system. It is found that the new fractional NLS equation can be derived from a suitable Lagrangian density, and a fractional Noether's theorem can be applied to it, thus predicting the conservation of the Hamiltonian, momentum and energy.

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La morfoestructura y características psicológicas de los bomberos cobran vital importancia, ya que deben poseer un rendimiento físico y psicológico de alto nivel, para afrontar los requerimientos propios de su labor. Es fundamental conocer el Biotipo, así como también, la personalidad resistente y el nivel de Síndrome Burnout presente en esta población, evaluando el perfil de voluntarios activos de las comunas de Valparaíso y Viña del Mar. Se estudiaron 101 voluntarios de sexo masculino, con edades entre los 20 y 50 años, de las compañías de Valparaíso y Viña del Mar. Se aplicó el método de somatotipo de Heath ­ Carter, personalidad resistente y el nivel de Síndrome Burnout guiados por la metodología de Moreno Jiménez. Los resultados indican un Somatotipo predominantemente como endomesomórfico, endomorfía 5,44±1,60; Mesomorfía 6,17±1,37; ectomorfía 0,90±1,23. La personalidad resistente se encuentra con una calificación alta, Compromiso 3,61±0,39; Reto 3,53±0,47; Control 3,41±0,42, presentando el control una categoría media según DE. El Síndrome Burnout presenta una calificación baja para Factores 15,38±4,17; Síndrome 18,79±4,10; Consecuencias 5,64±1,98. Se destaca un alto componente Endomórfico, lo que traería consigo un riesgo cardiovascular. El perímetro de pierna está relacionado inversamente con la dimensión Control de Personalidad resistente, lo que indica que a mayor perímetro menor puntuación en control, disminuyendo la resistencia al Síndrome Burnout. Esta población no deportista, voluntaria y altruista, sin una actividad física programada, constante y periodizada, se ve reflejada en sus características antropométricas.

The morphostructural analysis and psychological characteristics of firefighters are vital; specific physical and psychological levels are needed to meet the requirements of their work. It is essential to know biotype, personality resistance variables and level of burnout syndrome present in this population. We evaluated the profile of active volunteers in the cities of Valparaiso and Viña del Mar in Chile; 101 male volunteers, aged between 20 and 50 years were included in the study. Heath ­ Carter somatotype, Personality Resistance variables and level of Burnout Syndrome according to Jiménez Moreno methodology were applied. The results indicate a predominant somatotype as Endomesomorph, Endomorph 5.44±1.60; Mesomorph 6.17±1.37, Ectomorph 0.90±1.23. Personality resistance variable presented a high score, commitment 3.61±0.39, challenge 3.53±0.47, control 3.41±0.42. Burnout syndrome had a low factor rating 15.38±4.17, syndrome 18.79±4.10; consequences 5.64±1.98. There is a high endomorphic component increasing cardiovascular risk. Leg circumference is on the other hand, related to Personality resistance control, indicating that while perimeter is greater, the mark is lower for Burnout resistance syndrome. The lack of continuous and programmed physical activity in this population of volunteer firefighters is clearly reflected in their anthropometric characteristics.

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We consider solitons in a system of linearly coupled Korteweg-de Vries (KdV) equations, which model two-layer settings in various physical media. We demonstrate that traveling symmetric solitons with identical components are stable at velocities lower than a certain threshold value. Above the threshold, which is found exactly, the symmetric modes are unstable against spontaneous symmetry breaking, which gives rise to stable asymmetric solitons. The shape of the asymmetric solitons is found by means of a variational approximation and in the numerical form. Simulations of the evolution of an unstable symmetric soliton sometimes produce its breakup into two different asymmetric modes. Collisions between moving stable solitons, symmetric and asymmetric ones, are studied numerically, featuring noteworthy features. In particular, collisions between asymmetric solitons with identical polarities are always elastic, while in the case of opposite polarities the collision leads to a switch of the polarities of both solitons. Three-soliton collisions are studied too, featuring quite complex interaction scenarios.

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Este estudio fue desarrollado con la finalidad de formular una ecuación de predicción de % de masa adiposa en valores antropométricos, a partir, de los valores predeterminados a través del instrumento de bioimpedancia TANITA. Esto basado en la premisa de que cada día ha aumentado la importancia sobre la estimación de la masa adiposa a nivel clínico, por lo cual se evaluó una población de 28 sujetos cuyo rango de edad fluctúa entre los 20-28 años, pertenecientes a la Escuela de Caballería Blindada de la ciudad de Quillota. Se realizaron las mediciones pertinentes para la estimación de masa adiposa a través de la bioimpedancia y la antropometría, cuyos resultados arrojaron diferencias significativas entre ambos métodos, obteniendo un coeficiente de correlación de Pearson de 0,34. Esto nos indica que al evaluar los criterios de homocedasticidad, linealidad, para generar una ecuación de estimación, no sería posible...

This case was developed with the objective of makes a prediction equation of adipose mass percent in values anthropometric, to star off the predetermined slant of instruments of impedance bioelectric TANITA. This is based in the premise that every day the importance of estimation about the fat mass in a clinic level, it is getting bigger and bigger, for this reason a population of twenty eight people with age range fluctuate among twenty to twenty eight was evaluated, they were part of "Escuela de Caballería Blindada" in the city of Quillota. The Pertinent measurements for the estimation of fatty mass were realized through of impedance bioelectric and anthropometry, the results made big differences between both methods, obtaining an index of correlation coefficient a 0.13 and a person correlation of 0.34. This suggests that possible creation does not accomplish with the criteria homescedasticity, in brief, this is unsafe...

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Las alteraciones posturales tales como hiperlordosis, aumento de la cifosis, cifolordosis y escoliosis en columna, producen complicaciones a nivel músculo-esquelético y articular. Debido a esto, es que en el último tiempo ha aumentado el número de atenciones kinésicas por patologías de la columna lumbar, he aquí la importancia de un test clínico que cuente con la confiabilidad necesaria para determinar la curvatura lumbar. El objetivo de este estudio es determinar si existen diferencias en los resultados entre los dos métodos utilizados para medir la curva lumbar: el test clínico de las flechas sagitales y el ángulo de la columna lumbar mediante radiografías. En una muestra de 32 pacientes de edad promedio 44,93 (+/- 12,67 años) evaluados en el Servicio de Kinesiología del Centro Médico Megasalud de Viña del Mar entre los meses de Marzo y Agosto del 2008. El procedimiento utilizado fue el examen clínico, en el cual se usó una plomada que va desde C7, pasando por la línea ínterglútea. En el plano sagital se mide la curvatura lumbar a nivel de L3. Para la medición del ángulo de la curvatura lumbar se utilizó una radiografía proyección lateral en la cual se proyectan las mesetas superior de L1 e inferior de L5 para la conformación del ángulo lumbar y su posterior medición. El resultado obtenido por medio del examen clínico entre el test de las flechas sagitales y las radiografías del ángulo de la lordosis lumbar para un índice de concordancia de Kappa, fue mayor o igual a un 95 por ciento. De esta manera, se obtuvo que el test de las flechas sagitales es una herramienta válida para la pesquisa de patologías lumbares, al igual que la radiografía, con una marcada diferencia en el costo económico entre ambas.

The altered posture, such as hiperlordosis, increase in kyphosis, and scoliosis in cifolordosis column complications occur at the muscular, skeletal and articulate. Because of this, is that in recent times to increase the number of benefits for kinesics pathologies of the lumbar spine, and here the importance of a clinical test that has the confidence necessary to determine lumbar curvature. The objective of the study seeks to determine whether there are differences in outcomes between the two methods used to measure the lumbar curve, the test of the arrows sagitales and the angle of the lumbar spine using x-rays in patients greater than or equal to 21 years, as assessed the service kinesiology of Centro Médico Megasalud of Viña del Mar, between the months of March and August 2008. The procedure used was by means of physical examination, which uses a plumb line that runs from C7 through inter gluteal line in the sagittal plane was measured at the lumbar curvature of L3 and compared with the measurement of the angle curvature of the lumbar measured by radiographic position in bipedal in a side view in 32 adults, measures of kinesiology at the service of the Medical Center Megasalud of Viña del Mar, Chile. The result obtained by means of physical examination between the test of the arrows sagitales versus the angle of the lumbar lordosis measured by X-rays, reached a record of correlation between the two diagnostic tests greater than or equal to 95 percent. In conclusion we can say that the test of the arrows sagitales is a valid tool for the investigation of lumbar pathologies, like radiography, with a marked difference in cost between the two.

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We investigate the effects produced on the light scattering spectrum by the anisotropic diffusion of impurities in an incompressible nematic solvent. The spectrum is calculated by using a fluctuating hydrodynamic description when the system is both in a fully thermodynamic equilibrium state and in a nonequilibrium steady state induced by a dye-concentration gradient. In the former state, the isotropic pretransitional phase as well as the nematic phase of the solvent are considered. This spectrum is symmetric (Lorentzian) with respect to the frequency shifts, but anisotropic through its explicit dependence on the ratio of the diffusion coefficients of the dye parallel and normal to the mean molecular axis of the nematic. The values of these coefficients were taken from experimental measurements of diffusion of methylred and nitrosodimethylaniline in a N -( p -methoxybenzylidene)- p -butylaniline (MBBA) solvent. This anisotropy changes the height and the width at mid height with respect to the isotropic case in amounts which for MBBA vary up to 36% and 26%. We also calculate the spectrum in the presence of a concentration gradient of the dye and find that its presence gives rise to an asymmetry of the spectrum in its dependence on the frequency shift; its maximum increases and is displaced with respect to its equilibrium position. The size and direction of this shift are proportional to the magnitude of the dye-concentration gradient and depend on its relative orientation with respect to the scattering vector. For small dimensionless concentration gradients ( approximately 10(-2) ), this effect is maximum when these vectors are parallel and the scattering angle is low ( approximately 1 degrees ). The maximum degree of departure from equilibrium is significant and turns out to be approximately 55%. In view of the significant changes in the spectrum, our theoretical analysis suggests that these effects might be observable.

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An analytical and numerical study of the propagation of optical fields through a nematic hybrid slab is developed. We take into account explicitly the absorption of radiation by the liquid crystal by introducing a complex dielectric tensor. For a low intensity beam we first derive the eikonal equation and from it we calculate the ray trajectories in the optical limit. We show that in the presence of absorption, there are no caustics within the slab. Then we consider the WKB limit and calculate the field transverse magnetic modes, their number and their cutoff frequencies. We show that for both limits the agreement between our analytical and numerical results for the propagation constants is excellent, while there are larger differences in the analytically and numerically calculated field amplitudes. These differences show that absorption effects are important for this quantity and have their origin in the fact that the chosen parameter values in our exact numerical calculations, strictly speaking, do not lie within the limits of validity of the WKB approximation. Although a more precise comparison between these approaches requires the use of different sets of values of the relevant parameters, our analysis shows the effects and complications arising from the inclusion of absorption. Finally, we discuss the scope and limitations of our approach.

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A model for a non-Kerr cylindrical nematic fiber is presented. We use the multiple scales method to show the possibility of constructing different kinds of wave packets of transverse magnetic modes propagating through the fiber. This procedure allows us to generate different hierarchies of nonlinear partial differential equations which describe the propagation of optical pulses along the fiber. We go beyond the usual weakly nonlinear limit of a Kerr medium and derive a complex modified Korteweg-de Vries equation (CM KdV) which governs the dynamics for the amplitude of the wave packet. In this derivation the dispersion, self-focussing, and diffraction in the nematic fiber are taken into account. It is shown that this CM KdV equation has two-parameter families of bright and dark complex solitons. We show analytically that under certain conditions, the bright solitons are actually double-embedded solitons. We explain why these solitons do not radiate at all, even though their wave numbers are contained in the linear spectrum of the system. We study (numerically and analytically) the stability of these solitons. Our results show that these embedded solitons are stable solutions, which is an interesting property since in most systems the embedded solitons are weakly unstable solutions. Finally, we close the paper by making comments on the advantages as well as the limitations of our approach, and on further generalizations of the model and method presented.

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INTRODUCTION: Cerebral infarction (CI) increases vascular permeability because of a torrent of molecular events that take place. It frequently leads to oedema, haemorrhage and neuronal death. Free radicals and proteases are also formed, which cause lesions in the blood vessels, and microvascular integrity is lost through degradation of the basal lamina and the extracellular matrix. As a result rupture of the blood brain barrier takes place. AIMS. To compare the electrophoretograms of patients with ischemic cerebrovascular disease (ICVD) with those of controls and to link the alterations in the proteinogram with the ICVD subtypes. PATIENTS AND METHODS: The CSF of 55 controls and 136 patients with ICVD was examined. The total protein (TP) concentration was determined and a polyacrylamide gel electrophoretogram was produced using Coomassie blue stain. Parallel to this, serum was prepared for haptoglobin staining. RESULTS: The TP in patients CSF rose to a significantly higher level than that of controls. Blood brain barrier damage (BBBD) was observed in 28.7% of the patients studied with CI and in 10.3% in transient ischemic attacks (TIA), while 16.2% presented oligoclonal bands. There was a difference between the two sexes: men were found to have higher TP levels, lower percentages of prealbumin 1 and more BBBD than women. CONCLUSIONS: BBBD is more frequent in infarctions than in TIA, and is predominant in men with thrombotic cerebral infarction.

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Dissipative effects due to the presence of hydrodynamic flow in a cylindrical fiber whose cladding is an initially quiescent incompressible nematic liquid crystal are analyzed. An analytic and iterative solution of the nematodynamic equations coupled to the Maxwell's equations describing the propagation of a narrow wave packet of transverse magnetic modes is provided. We derive a generalized nonlinear Schröedinger equation for the amplitude of this propagating wave packet that takes into account the dissipation in the nematic's reorientation and the hydrodynamical effects. For the solitonlike solution of this equation we find that the penetration length and the real part of the nonlinear refraction index increase by a factor of 1.75, with respect to those values obtained in the absence of hydrodynamical flow. The imaginary part remains unaltered.