Self interacting Brans Dicke cosmology and Quintessence

Recent cosmological observations reveal that we are living in a flat accelerated expanding universe. In this work we have investigated the nature of the potential compatible with the power law expansion of the universe in a self interacting Brans Dicke cosmology with a perfect fluid background and have analyzed whether this potential supports the accelerated expansion. It is found that positive power law potential is relevant in this scenario and can drive accelerated expansion for negative Brans Dicke coupling parameter $\omega$. The evolution of the density perturbation is also analyzed in this scenerio and is seen that the model allows growing modes for negative $\omega$.Comment: 8pages, 5 figures, PRD style, some changes are made, figures added, reference added. To be published in Int. J. Mod. Phys.

Editorial: Cancer Nanotheranostics: What Have We Learned So Far?

According to the National Cancer Institute, in 2015 an estimated of 1.7 million new cases of cancer will be diagnosed only in the United States and around 600, 000 people will die from the disease. The most common type of cancer is breast cancer, with more than 234, 000 new cases expected in the United States in 2015. The next most common cancers are prostate cancer and lung cancer.After a quarter of century of rapid technological advances, research has revealed the complexity of cancer, a disease intimately related to the dynamic transformation of the genome. These transformations trigger a range of modification to cell processes and molecular events that initiate and promote tumor genesis and progression, then local invasion and metastasis, i.e., the hallmarks of cancer development. These alterations may cause a wide scope of “diseases” that share similar molecular patterns that cause transformation and malignancy. Each of this stepwise evolution of the initial molecular event drives abnormal growth and loss of differentiation that ultimately causes tissue and organ failure. The initial molecular event may lay within the erroneous expression of a given gene, epigenetic modification and/or sporadic mutations occurring on genomic DNA during the life span of organisms. Each and every one of these molecular events may be evaluated and used as diagnostics biomarker and therapeutic target. For example, therapy action may target a mutated gene and silence its expression so as to avoid erroneous protein expression that mutates cell function. However, the full understanding of the molecular onset of this disease is still far from achieved and the search for mechanisms of treatment will follow closely..

Fractional viscoelastic models on time scales

The main goal of this work is the generalisation of fractional viscoelastic models on Time Scales, applying the Riemann-Liouville derivative to the Maxwell's viscoelastic constitutive law. We show that, in time scale, the solution found is also expressed through the Miller-Ross function.Fundação para a Ciência e a Tecnologia (FCT)CMA

Gravitational Waves in Generalised Brans-Dicke Theory

We have solved cosmological gravitational Wave(GW)equation in the frame work of Generalised Brans-Dicke(GBD) theory for all epochs of the Universe.The solutions are expressed in terms of the present value of the Brans-Dicke coupling parameter $\omega(\phi)$.It is seen that the solutions represent travelling growing modes for negative values of $\omega_{0}$ for all epochs of the Universe.Comment: 7Pages,no figure

Reconstruction of eye movements during blinks

In eye movement research in reading, the amount of data plays a crucial role for the validation of results. A methodological problem for the analysis of the eye movement in reading are blinks, when readers close their eyes. Blinking rate increases with increasing reading time, resulting in high data losses, especially for older adults or reading impaired subjects. We present a method, based on the symbolic sequence dynamics of the eye movements, that reconstructs the horizontal position of the eyes while the reader blinks. The method makes use of an observed fact that the movements of the eyes before closing or after opening contain information about the eyes movements during blinks. Test results indicate that our reconstruction method is superior to methods that use simpler interpolation approaches. In addition, analyses of the reconstructed data show no significant deviation from the usual behavior observed in readers

Density Perturbations in the Brans-Dicke Theory

We analyse the fate of density perturbation in the Brans-Dicke Theory, giving a general classification of the solutions of the perturbed equations when the scale factor of the background evolves as a power law. We study with details the cases of vacuum, inflation, radiation and incoherent matter. We find, for the a negative Brans-Dicke parameter, a significant amplification of perturbations.Comment: 26 pages, latex fil

Health assistance in advanced disease: resource and responses of health professionals

Hoy en día crece la ilusión o esperanza de que la muerte pueda ser controlada, postergada o incluso vencida. Es por eso que estas ideas se vinculan frecuentemente a los profesionales de la salud. El objetivo de este trabajo es entender cómo estos profesionales experimentan el cuidado al paciente en estado de enfermedad avanzada o terminal, así como conocer los recursos personales utilizados para este propósito. El estudio se realizó con la colaboración de profesionales de la salud que trabajan en Unidades de Cuidados Continuados de la región de Tras-os-Montes y Alto Douro (Portugal), siendo un total de 147 personas. Se utilizó una encuesta de caracterización sociodemográfica y profesional, así como el Inventario de Respuestas y Recursos Personales (BPS/IRRP, Copyright, de Evaluación Automatizada, traducido y validado para la población portuguesa por McIntyre y Silvério, 1995). Algunas de las conclusiones a las que se llegó es que los profesionales de la salud que atienden a pacientes con enfermedades terminales requieren de u mayor apoyo. Y, aunque muchos recurren a la espiritualidad, la formación académica y profesional es una variable estadísticamente significativa en la preparación y ayuda de estos profesionales