Rare top decay and CP violation in THDM

We discuss the formalism of two Higgs doublet model type III with CP violation from CP-even CP-odd mixing in the neutral Higgs bosons. The flavor changing interactions among neutral Higgs bosons and fermions are presented at tree level in this type of model. These assumptions allow the study rare top decays mediated by neutral Higgs bosons, particularly we are interested in $t\rightarrow c l^+l^-$. For this process we estimated upper bounds of the branching ratios $\textrm{Br}(t\rightarrow c \tau^+\tau^-)$ of the order of $10^{-9}\sim 10^{-7}$ for a neutral Higgs boson mass of 125 GeV and $\tan\beta=1$, 1.5, 2, 2.5. For the case of $t\rightarrow c \tau^+\tau^-$ the number of possible events is estimated from 1 to 10 events which could be observed in future experiments at LHC with a luminosity of 300 $\textrm{fb}^{-1}$ and 14 GeV for the energy of the center of mass. Also we estimate that the number of events for the process $t\rightarrow c l^+l^-$ in different scenarios is of order of $2500$.Comment: 8 pages, 5 figure

How agriculture, connectivity and water management can affect water quality of a Mediterranean coastal wetland

The Natural Park of Albufera (Valencia, Spain) is an important Mediterranean coastal wetland that suffers continuous environmental effects from human activities and water uses, mainly related to agriculture and urban/industrial sewage discharges. The aim of this research was to assess the water quality of the different aquatic environments of this wetland, taking into account the connection between them, the agricultural impact and the management of irrigation water. The UEWater Framework Directive was followed in order to evaluate the ecological and trophic status of water systems. Spatial approaches were used to integrate physicochemical data into GIS vector layers to map the more problematic points of pollution. The results showed a globally eutrophic system with poor ecological potential. The wetland is nutrient-overloaded during the entire rice cultivation period. Good-quality water inputs are deficient, since the river network already has high levels of nutrients and pollutants, especially in the northern area, where river water is mixed with inappropriate effluents from wastewater treatment plants. Agriculture and water management affected the area intensively up to the Albufera lake, modulating most of the studied variables. The information gathered here can help to optimize the global study and management of the coastal Mediterranean wetlands, which are highly linked to agriculture

Long-Term hydrological regime monitoring of a Mediterranean agro-ecological wetland using Landsat imagery: Correlation with the water renewal rate of a shallow lake

The Natural Park of Albufera (Valencia, Spain) is one of the Spanish Mediterranean wetlands where rice is cultivated intensively. The hydrology of the Albufera Lake, located in the center, combines natural contributions with complex human management. The aim of our study was to develop a new methodology to accurately detect the volume of flood water in complex natural environments which experience significant seasonal changes due to climate and agriculture. The study included 132 Landsat images, covering a 15-year period. The algorithm was adjusted using the NDWI index and simultaneous measurements of water levels in the rice fields. The NDVI index was applied to monitor the cultivated area during the summer. Lake inflows and residence times were also evaluated to quantify how the hydrodynamic of the lake is conditioned by the agricultural management. The algorithm developed is confirmed as a useful ecological tool to monitor the flood cycle of the wetland, being able to detect even the lowest water levels. The flood dynamics are consistent over the fifteen years, being in line with the rice cultivation cycle. Water renewal in Albufera lake is altered with respect to that expected according to the rainfall recorded in the study area, so an improvement in the water management of the hydrological basin is required to optimize the runoff during the rainiest months

Bouncing Neutrons and the Neutron Centrifuge

The recent observation of the quantum state of the neutron bouncing freely under gravity allows some novel experiments. A method of purifying the ground state is given, and possible applications to the measurement of the electric dipole moment of the neutron and the short distance behaviour of gravity are discussed.Comment: 7 pages, 7 figure

Examples of q-regularization

An Introduction to Hopf algebras as a tool for the regularization of relavent quantities in quantum field theory is given. We deform algebraic spaces by introducing q as a regulator of a non-commutative and non-cocommutative Hopf algebra. Relevant quantities are finite provided q\neq 1 and diverge in the limit q\rightarrow 1. We discuss q-regularization on different q-deformed spaces for \lambda\phi^4 theory as example to illustrate the idea.Comment: 17 pages, LaTex, to be published in IJTP 1995.1

Physical inactivity and associated factors in elderly people in Brazil

El objetivo fue analizar los factores asociados a la inactividad física en personas mayores en Brasil. Se utilizó un diseño transversal, con una muestra representativa de 909 sujetos de 60 años o más. Fueron clasificados como físicamente inactivos los individuos con menos de 150 minutos de actividad física semanal. La identificación de los factores sociodemográficos, aspectos comportamentales y de salud asociados con la inactividad física se realizó con un análisis multivariante a través de una regresión de Poisson Los resultados sugieren una prevalencia del 39,1% para la inactividad física. La inactividad física presenta una mayor prevalente con o el incremento de la edad, la falta de práctica de actividad física regular en el pasado, los síntomas de depresión y la discapacidad en las Actividades Instrumentales de la Vida Diaria. El aumento de la edad, la falta de práctica regular de actividad física en el pasado, los síntomas depresivos y la discapacidad en las Actividades Instrumentales de la Vida Diaria se evidencian como factores asociados a la inactividad física.The aim was to analyse factors associated with physical inactivity in elderly Brazilians. The study was carried out by using a cross-sectional design and it comprised a representative sample of 909 subjects. Physical inactivity was defined as fewer than 150 minutes per week. In order to identify socio-demographic factors and behavioural and health aspects, which may be associated with physical inactivity, we carried out a multivariate analysis through the Poisson regression. Results suggest that physical inactivity has a prevalence of 39.1%. Physical inactivity presents a higher prevalence with an increase in age, a lack of regular physical activity practice in the past, depressive symptoms and disability in the instrumental activities of daily living. An increase in age, a lack of regular physical activity practice in the past, depressive symptoms and disability in the instrumental activities of daily living are shown as causes of physical inactivit

Feasibility of diffusion and probabilistic white matter analysis in patients implanted with a deep brain stimulator.

Deep brain stimulation (DBS) for Parkinson\u27s disease (PD) is an established advanced therapy that produces therapeutic effects through high frequency stimulation. Although this therapeutic option leads to improved clinical outcomes, the mechanisms of the underlying efficacy of this treatment are not well understood. Therefore, investigation of DBS and its postoperative effects on brain architecture is of great interest. Diffusion weighted imaging (DWI) is an advanced imaging technique, which has the ability to estimate the structure of white matter fibers; however, clinical application of DWI after DBS implantation is challenging due to the strong susceptibility artifacts caused by implanted devices. This study aims to evaluate the feasibility of generating meaningful white matter reconstructions after DBS implantation; and to subsequently quantify the degree to which these tracts are affected by post-operative device-related artifacts. DWI was safely performed before and after implanting electrodes for DBS in 9 PD patients. Differences within each subject between pre- and post-implantation FA, MD, and RD values for 123 regions of interest (ROIs) were calculated. While differences were noted globally, they were larger in regions directly affected by the artifact. White matter tracts were generated from each ROI with probabilistic tractography, revealing significant differences in the reconstruction of several white matter structures after DBS. Tracts pertinent to PD, such as regions of the substantia nigra and nigrostriatal tracts, were largely unaffected. The aim of this study was to demonstrate the feasibility and clinical applicability of acquiring and processing DWI post-operatively in PD patients after DBS implantation. The presence of global differences provides an impetus for acquiring DWI shortly after implantation to establish a new baseline against which longitudinal changes in brain connectivity in DBS patients can be compared. Understanding that post-operative fiber tracking in patients is feasible on a clinically-relevant scale has significant implications for increasing our current understanding of the pathophysiology of movement disorders, and may provide insights into better defining the pathophysiology and therapeutic effects of DBS

Mechanisms of Interference in Vibrotactile Working Memory

In previous studies of interference in vibrotactile working memory, subjects were presented with an interfering distractor stimulus during the delay period between the target and probe stimuli in a delayed match-to-sample task. The accuracy of same/different decisions indicated feature overwriting was the mechanism of interference. However, the distractor was presented late in the delay period, and the distractor may have interfered with the decision-making process, rather than the maintenance of stored information. The present study varies the timing of distractor onset, (either early, in the middle, or late in the delay period), and demonstrates both overwriting and non-overwriting forms of interference

Examining relational social ontologies of disaster resilience: lived experiences from India, Indonesia, Nepal, Chile and Andean territories

Purpose: The neoliberal resilience discourse and its critiques both contribute to its hegemony, obscuring alternative discourses in the context of risk and uncertainties. Drawing from the “ontology of potentiality”, the authors suggest reclaiming “resilience” through situated accounts of the connected and relational every day from the global south. To explore alternate possibilities, the authors draw attention to the social ontology of disaster resilience that foregrounds relationality, intersectionality and situated knowledge. / Design/methodology/approach: Quilting together the field work experiences in India, Indonesia, Nepal, Chile and Andean territories, the authors interrogate the social ontologies and politics of resilience in disaster studies in these contexts through six vignettes. Quilting, as a research methodology, weaves together various individual fragments involving their specific materialities, situated knowledge, layered temporalities, affects and memories. The authors’ six vignettes discuss the use, politicisation and resistance to resilience in the aftermath of disasters. / Findings: While the pieces do not try to bring out a single “truth”, the authors argue that firstly, the vignettes provide non-Western conceptualisations of resilience, and attempts to provincialise externally imposed notions of resilience. Secondly, they draw attention to social ontology of resilience as the examples underscores the intersubjectivity of disaster experiences, the relational reaching out to communities and significant others. / Originality/value: Drawing from in-depth research conducted in six disaster contexts by seven scholars from South Asia, South America and Northern Europe, the authors embrace pluralist situated knowledge, and cross-cultural/language co-authoring. Thus, the co-authored piece contributes to diversifying disaster studies scholarship methodologically