Dynamics of radiating braneworlds

If the observable universe is a braneworld of Randall-Sundrum type, then particle interactions at high energies will produce 5-dimensional gravitons that escape into the bulk. As a result, the Weyl energy density on the brane does not behave like radiation in the early universe, but does so only later, in the low energy regime. Recently a simple model was proposed to describe this modification of the Randall-Sundrum cosmology. We investigate the dynamics of this model, and find the exact solution of the field equations. We use a dynamical systems approach to analyze global features of the phase space of solutions.Comment: error in figures corrected, reference adde

Subjective Socioeconomic Status Matters Less When Perceived Social Support Is High: A Study of Cortisol Responses to Stress

Low objective and subjective socioeconomic status (SES) is associated with the experience offrequent stressors known to have physiological costs. We tested whether perceived social support, a key health-protective resource, buffered the association between lower subjective SES and cortisol responses to an acute stressor. Participants (N=115; 54.78% female; age M=19.56) reported subjective SES and perceived support, completed a social-evaluative stressor task, and provided saliva for cortisol assessment. There was a significant interaction of subjective SES with support predicting linear change in cortisol stress responses, γ=0.08, z=2.34, p=.02. When support was low, subjective SES was strongly related to cortisol, and those who reported lower subjective SES exhibited higher cortisol during recovery than those who reported higher subjective SES. When support was high, those who reported higher and lower subjective SES exhibited similar cortisol responses. These results highlight the important, protective role that supportive relationships can have when subjective SES is low

Impact of the Timing and Use of an Insecticide on Arthropods in Cover-Crop-Corn Systems

Cover crops provide a habitat for pests and beneficial arthropods. Unexpected pest pressure in a cover-crop-to-corn system can occur and result in increased use of insecticides. Eight site-years of on-farm field studies were conducted in 2019, 2020, and 2021. The objective of the study was to evaluate the impact of insecticide timing relative to cover-crop termination on arthropod activity in a cover-crop-to-corn system. The treatments consisted of (i) glyphosate to terminate the cover crop, (ii) glyphosate and pyrethroid tank mix to terminate the cover crop, and (iii) glyphosate to terminate the cover crop and pyrethroid application 25 days after the termination. Arthropod activity was measured with pitfall traps before and at each treatment application. A total of 33,316 arthropods were collected. Total arthropods, Collembola, and Aphididae were the only taxa reduced with an insecticide application. The other arthropod taxa were mainly influenced by the sampling period. No significant pest pressure occurred at any site-year. Insecticide applications are not generally needed in a cover-crop-to-corn system. Scouting for pests and applying strategies only when necessary is crucial to conserve potentially beneficial arthropods in the system

Semi-Lagrangian Scheme with Arakawa Splitting for Gyro-kinetic Equations

The gyro-kinetic model is an approximation of the Vlasov-Maxwell system in a strongly magnetized magnetic field. We propose a new algorithm for solving it combining the Semi-Lagrangian (SL) method and the Arakawa (AKW) scheme with a time-integrator. Both methods are successfully used in practice for different kinds of applications, in our case, we combine them by first decomposing the problem into a fast (parallel) and a slow (perpendicular) dynamical system. The SL approach and the AKW scheme will be used to solve respectively the fast and the slow subsystems. Compared to the scheme in [1], where the entire model is solved using only the SL method, our goal is to replace the method used in the slow subsystem by the AKW scheme, in order to improve the conservation of the physical constants

La afectación de la garantía al debido proceso mediante la incorporación de los artículos 5 y 32.4 del Nuevo Código Procesal Constitucional

La presente investigación tuvo como objetivo general determinar la manera en que se afecta la garantía del debido proceso mediante la incorporación de los artículos 5 y 32.4 al Nuevo Código Procesal Constitucional, la cual fue realizada en la ciudad de Trujillo, teniendo como tipo de investigación una básica y con un diseño basado en la teoría fundamentada. Para la recolección de la información se empleó el cuestionario de entrevista y la guía de análisis de documentos, los cuales fueron validados por el juicio de tres expertos en la materia y aplicados a dos procuradores, dos fiscales, dos abogados litigantes y un docente universitario. Los resultados obtenidos mostraron que existe una deficiencia normativa respecto al segundo párrafo del artículo 5 y 32.4 del Nuevo Código Procesal Constitucional, ya que la misma contiene una disposición que está vulnerando la garantía del debido proceso. La investigación concluyó que la garantía al debido proceso debe ser de observancia obligatoria tanto como para operadores jurídicos como para los legisladores al momento de promulgar leyes y, siguiendo esa línea, resulta necesario pues una reforma al aludido código adjetivo en el sentido de correr traslado a los demandado

Susceptibility of Candida albicans and Candida dubliniensis to erythrosine- and LED-mediated photodynamic therapy

AbstractThe effect of erythrosine- and LED-mediated photodynamic therapy (PDT) on planktonic cultures and biofilms of Candida albicans and Candida dubliniensis was evaluated. Planktonic cultures of standardized suspensions (106cells/mL) of C. albicans and C. dubliniensis were treated with erythrosine concentrations of 0.39–200μM and LEDs in a 96-well microtiter plate. Biofilms formed by C. albicans and C. dubliniensis in the bottom of a 96-well microtiter plate were treated with 400μM erythrosine and LEDs. After PDT, the biofilms were analysed by scanning electron microscopy (SEM). The antimicrobial effect of PDT against planktonic cultures and biofilms was verified by counting colony-forming units (CFU/mL), and the data were submitted to analysis of variance and the Tukey test (P<0.05). C. albicans and C. dubliniensis were not detectable after PDT of planktonic cultures with erythrosine concentrations of 3.12μM or higher. The CFU/mL values obtained from biofilms were reduced 0.74 log10 for C. albicans and 0.21 log10 for C. dubliniensis. SEM revealed a decrease in the quantity of yeasts and hyphae in the biofilm after PDT. In conclusion, C. albicans and C. dubliniensis were susceptible to erythrosine- and LED-mediated PDT, but the biofilms of both Candida species were more resistant than their planktonic counterparts

Migration Transforms the Conditions for the Achievement of the Sustainable Development Goals

Migration is transformative both for those who move and for the places and economies of source and destination. The global stock of migrants, depending on definition, is approximately 750 million people: to assume that the world is static and that migration is a problem to be managed is inaccurate. Since migration is a major driving force of planetary and population health, we argue that it must be more directly incorporated into planning for sustainable development, with a focus on the extent and way in which the Sustainable Development Goals (SDGs) incorporate the transformative reality of migration

Feline chronic gingivostomatitis with calicivirus infection: case report

Feline chronic gingivostomatitis (FCGS) is an oral inflammatory condition that frequently affects felines. Its etiology is not well defined, but several viral agents are thought to be involved. Several therapeutic protocols have been described, yet treatment response is often variable, and the therapeutic success is transient with an unpredictable duration. Therefore, the therapeutic strategy needs to be tailored for each patient. This work relates a case characterized by viral involvement in its etiopathogenesis providing an alternative to the most widely-used methods that so often frustrate both veterinary doctors and pet owners.A gengivostomatite crônica felina (FCGS) é uma condição inflamatória oral que frequentemente afeta felinos. A sua etiologia não está bem definida, mas acredita-se que vários agentes virais possam estar envolvidos. Muitos protocolos terapêuticos têm sido descritos, no entanto, a resposta ao tratamento é frequentemente variável e o sucesso terapêutico é transitório com uma duração imprevisível. Portanto, a estratégia terapêutica precisa ser adaptada para cada paciente. O presente trabalho propõe a caracterização do envolvimento viral na etiopatogenia da doença como uma alternativa aos métodos mais amplamente utilizados, que muitas vezes frustram médicos veterinários e os donos de animais de estimação