Dark energy after GW170817, revisited

We revisit the status of scalar-tensor theories with applications to dark energy in the aftermath of the gravitational wave signal GW170817 and its optical counterpart GRB170817A. At the level of the cosmological background, we identify a class of theories, previously declared unviable in this context, whose anomalous gravitational wave speed is proportional to the scalar equation of motion. As long as the scalar field is assumed not to couple directly to matter, this raises the possibility of compatibility with the gravitational wave data, for any cosmological sources, thanks to the scalar dynamics. This newly "rescued" class of theories includes examples of generalised quintic galileons from Horndeski theories. Despite the promise of this leading order result, we show that the loophole ultimately fails when we include the effect of large scale inhomogeneities.Comment: Updated with corrections to the gravitational wave propagation coming from higher order terms in the presence of large scale inhomogeneities. These close off any remaining loopholes. References adde

The Influence of Defendant Race/Ethnicity and Police Body-Worn Cameras on Traffic Case Processing

The current study evaluates the impact of defendant race/ethnicity and police body-worn cameras (BWCs) on dismissals and guilty pleas in traffic violations. Despite the frequency of traffic violations and the potential for racial/ethnic bias in these incidents, researchers have yet to examine the outcomes of these violations in court. Research is also needed to assess the potential for BWCs to provide evidence and reduce charging disparities and differential pleas for minority defendants. Traffic violations processed in the Tempe, Arizona Municipal Court before and after BWC deployment were examined using logistic regression. Black and Hispanic defendants were less likely to have their violations dismissed than White defendants, regardless of the presence of a BWC. Hispanic defendants were significantly more likely to plead guilty to traffic violations than White defendants, and BWCs did not eliminate this disparity. BWCs did significantly reduce the likelihood of a guilty plea for Black and White defendants, but the finding was not robust to the inclusion of an interaction term between race and BWCs. BWCs did not significantly moderate the impact of defendant race/ethnicity on either dismissals or guilty pleas. Overall, the results suggest that BWCs have little impact on reducing racial/ethnic disparities in traffic violation processing

Culture-Negative Endocarditis Complicated with Mycotic Aneurysm and Intracranial Bleed - A Case Report

Background: Blood culture-negative infective endocarditis (IE) requires at least three independent blood samples with negative cultures after seven days of incubation. Ischemic events are the most frequent neurologic complication of IE with intracranial mycotic aneurysms being the consequence of displacement of septic emboli from valvular vegetations. In this case report, we describe a young gentleman who initially presented with neurologic deficit and was later found to have mycotic aneurysms and culture negative infective endocarditis. Case Presentation: A 34-year-old man with a past medical history of Tourette Syndrome presented to the Emergency department (ED) due to acute change in mental status. In the ED, the patient was found to have a Glasgow Coma Scale of 4 and was immediately intubated. Initial computed tomography (CT) of the head without contrast showed a large intraparenchymal hematoma within the left frontal lobe with internal hypoechoic densities suggesting active bleeding and a left-to-right midline shift. A subarachnoid hemorrhage was also noted on the left. The patient was taken to the operating room for emergent right ventriculostomy placement. Subsequent CT angiography of the head revealed a focal lobulated area of contrast density suspicious for a ruptured aneurysm. An additional peripheral aneurysm was found within the peripheral aspect of the right parietal lobe. Due to peripheral location of the aneurysms, they were deemed to be mycotic and patient underwent embolization of the left frontal and right parietal aneurysms. Patient was initially treated with vancomycin and piperacillin-tazobactam for the first 24 hours and was later switched to vancomycin, ceftriaxone, and tobramycin by the infectious disease specialist. Due to patient having recurrent fevers despite antibiotic therapy, a transesophageal echocardiogram (TEE) was performed showing a small mobile echodensity on the anterior leaflet of the mitral valve, highly suspicious of vegetation and endocarditis. The anaerobic bottle of the initial blood culture grew anaerobic gram-positive cocci, identified as Finegoldia magna suspected to be a contaminant. Subsequent cultures were negative. Conclusion: Currently, there are no randomized trials to guide the management of infected aneurysms. Management strategies are based upon clinical experience usually with antibiotic therapy combined with surgical debridement and revascularization

La teoría de la mente según el simulacionismo científico

Resultados recientes de los trabajos en neurociencias describen algunos puntos fundamentales relacionados con el funcionamiento de la teoría de la mente (TdM) en el homo sapiens sapiens. Algunos hallazgos han suscitado polémica entre los seguidores del simulacionismo y los adeptos de la teoría-teoría, privilegiando especialmente el punto de vista de los primeros. En este artículo se argumenta que, lejos de regresar a una discusión polarizada, se requiere el desarrollo de un constructo de la teoría de la mente (TdM) acorde con el gran cuerpo de resultados de la investigación científica. Ni el simulacionismo ni la teoría-teoría, así como tampoco el modularismo ni una perspectiva híbrida entre esos enfoques parece capaz de dirigir un verdadero progreso. En su lugar, una noción de la TdM humana en términos de nuestra constitución biológica y de los recursos que en esa constitución pueden verse instanciados, podría ser un camino más indicado. La evidencia neurocientífica se sugiere como un buen cimiento para ese proyecto

Escuela de artes San Francisco

Trabajo de gradoDesarrollo de un proyecto arquitectónico implantado en el municipio de Villa de Leyva, continuo al claustro de San Francisco y detrás del parqueadero de la terminal de transporte principal del municipio, en el límite de un contexto histórico muy marcado; junto a un contexto de expansión urbanística de vivienda colonial; además, el lote de intervención está demarcado con la quebrada de San Francisco y por consiguiente a su ronda de aislamiento (9m). Por otro lado el municipio está regido por normas estrictas tales como: color, tipología y morfología; además de esto su arquitectura está basada en tres arquetipos básicos que son: el aula, el recinto y el porche.INTRODUCCIÓN 1. GENERALIDADES 2. LEVANTAMIENTO DE INFORMACIÓN 3. CONCLUSIONES 4. RECOMENDACIONES 5. BIBLIOGRAFÍA 6. ANEXOSPregradoArquitect