Lead X-Ray Vests: Pros and Cons in Dental Radiography and Patient Education on Radiographic Technology

Problem: There is a greater need to emphasize and educate patients and providers about radiologic advancements and patient exposure. The tradition of placing lead x-ray vests on patients for all radiographs is no longer a necessity. Without the explanation of why lead aprons are no longer needed, unnecessary steps for the provider and potential harm to the patient could be caused. Methods: This review of literature was assembled by analyzing data from primary and secondary sources through online databases. The most recent research on the risks and benefits of the use of lead x-ray vests towards patients in the dental office was examined. Articles included in this review were published within the last five years. Major Findings: Studies show the use of lead x-ray vests is widely obsolete with most new types of radiographic technology. Conclusions: Collimation and new digital radiographic devices have dramatically decreased patient radiation exposure by limiting the beam to a confined space on the patient\u27s oral cavity. There is also a risk that vests may pose a lead exposure hazard if not taken care of properly. The general patient population is widely unaware of these advancements in x-ray technology and of the ineffectiveness of lead aprons.https://scholarscompass.vcu.edu/denh_student/1020/thumbnail.jp

Neurodiversity and the Use of Art to Facilitate Communicating Emotions; A Preliminary Study

This research study explored whether art can be used to facilitate communicating emotions among individuals with ASD. A total of ten participants were included in this study. Five participants were diagnosed with ASD and the remaining five did not have ASD. The method that was used to collect the data included; an art questionnaire, Galvanic Skin Response and face task, art activity, two interview sessions and a face task. The results of the study found that through the process of creating art, individuals with ASD were more likely to communicate their emotions freely. Participants with and without ASD were able to express emotions better when engaging in active participation and concrete art. Individuals with ASD that used art became more conscious of their feelings, experienced themselves in the art making process, focused on making meaning, constructed a personal sense of self and enhanced their mood as they shared their emotions

Capital intelectual y desempeño docente en una institución educativa de la provincia de los Ríos - Ecuador

Una institución educativa ubicada en la provincia de los Ríos fue el sector específico donde se realizó el sondeo para llevar a cabo la presente investigación que tuvo como objetivo establecer la relación entre el capital intelectual y desempeño docente, el cual tuvo un enfoque cuantitativo. El estudio se desarrolló a una población de 18 maestros del plantel, utilizando un cuestionario como instrumento y la técnica que se utilizo fue la encuesta para dichas variables, el estadístico alfa de Cronbach fue el utilizado para medir la correlación de los items

Results of the Updated NASA Kennedy Space Center 50-MHz Doppler Radar Wind Profiler Operational Acceptance Test

We present here the methodology and results of the Operational Acceptance Test (OAT) performed on the new Kennedy Space Center (KSC) 50-MHz Doppler Radar Wind Profiler (DRWP). On day-of-launch (DOL), space launch vehicle operators have used data from the DRWP to invalidate winds in prelaunch loads and trajectory assessments due to the DRWP's capability to quickly identify changes in the wind profile within a rapidly-changing wind environment. The previous DRWP has been replaced with a completely new system, which needs to undergo certification testing before being accepted for use in range operations. The new DRWP replaces the previous three-beam system made of coaxial cables and a copper wire ground plane with a four-beam system that uses Yagi antennae with enhanced beam steering capability. In addition, the new system contains updated user interface software while maintaining the same general capability as the previous system. The new DRWP continues to use the Median Filter First Guess (MFFG) algorithm to generate a wind profile from Doppler spectra at each range gate. DeTect (2015) contains further details on the upgrade. The OAT is a short-term test designed so that end users can utilize the new DRWP in a similar manner to the previous DRWP during mission operations at the Eastern Range in the midst of a long-term certification process. This paper describes the Marshall Space Flight Center Natural Environments Branch's (MSFC NE's) analyses to verify the quality and accuracy of the DRWP's meteorological data output as compared to the previous DRWP. Ultimately, each launch vehicle program has the responsibility to certify the system for their own use

Metastable Dynamics above the Glass Transition

The element of metastability is incorporated in the fluctuating nonlinear hydrodynamic description of the mode coupling theory (MCT) of the liquid-glass transition. This is achieved through the introduction of the defect density variable $n$ into the set of slow variables with the mass density $\rho$ and the momentum density ${\bf g}$. As a first approximation, we consider the case where motions associated with $n$ are much slower than those associated with $\rho$. Self-consistently, assuming one is near a critical surface in the MCT sense, we find that the observed slowing down of the dynamics corresponds to a certain limit of a very shallow metastable well and a weak coupling between $\rho$ and $n$. The metastability parameters as well as the exponents describing the observed sequence of time relaxations are given as smooth functions of the temperature without any evidence for a special temperature. We then investigate the case where the defect dynamics is included. We find that the slowing down of the dynamics corresponds to the system arranging itself such that the kinetic coefficient $\gamma_v$ governing the diffusion of the defects approaches from above a small temperature-dependent value $\gamma^c_v$.Comment: 38 pages, 14 figures (6 figs. are included as a uuencoded tar- compressed file. The rest is available upon request.), RevTEX3.0+eps

Fluctuation-Response Relations for Multi-Time Correlations

We show that time-correlation functions of arbitrary order for any random variable in a statistical dynamical system can be calculated as higher-order response functions of the mean history of the variable. The response is to a ``control term'' added as a modification to the master equation for statistical distributions. The proof of the relations is based upon a variational characterization of the generating functional of the time-correlations. The same fluctuation-response relations are preserved within moment-closures for the statistical dynamical system, when these are constructed via the variational Rayleigh-Ritz procedure. For the 2-time correlations of the moment-variables themselves, the fluctuation-response relation is equivalent to an ``Onsager regression hypothesis'' for the small fluctuations. For correlations of higher-order, there is a new effect in addition to such linear propagation of fluctuations present instantaneously: the dynamical generation of correlations by nonlinear interaction of fluctuations. In general, we discuss some physical and mathematical aspects of the {\it Ans\"{a}tze} required for an accurate calculation of the time correlations. We also comment briefly upon the computational use of these relations, which is well-suited for automatic differentiation tools. An example will be given of a simple closure for turbulent energy decay, which illustrates the numerical application of the relations.Comment: 28 pages, 1 figure, submitted to Phys. Rev.

Mode-coupling theory and the fluctuation-dissipation theorem for nonlinear Langevin equations with multiplicative noise

In this letter, we develop a mode-coupling theory for a class of nonlinear Langevin equations with multiplicative noise using a field theoretic formalism. These equations are simplified models of realistic colloidal suspensions. We prove that the derived equations are consistent with the fluctuation-dissipation theorem. We also discuss the generalization of the result given here to real fluids, and the possible description of supercooled fluids in the aging regime. We demonstrate that the standard idealized mode-coupling theory is not consistent with the FDT in a strict field theoretic sense.Comment: 14 pages, to appear in J. Phys.

Matrix generalizations of some dynamic field theories

We introduce matrix generalizations of the Navier--Stokes (NS) equation for fluid flow, and the Kardar--Parisi--Zhang (KPZ) equation for interface growth. The underlying field, velocity for the NS equation, or the height in the case of KPZ, is promoted to a matrix that transforms as the adjoint representation of $SU(N)$. Perturbative expansions simplify in the $N\to\infty$ limit, dominated by planar graphs. We provide the results of a one--loop analysis, but have not succeeded in finding the full solution of the theory in this limit.Comment: 9 pages, Hard copy figures available from: [email protected]

Relación del perfil lipídico y presión arterial en pacientes con aterosclerosis.

Atherosclerosis is a chronic, generalized and progressive disease that mainly affects medium-sized arteries; its thrombotic complications are the cause of a significant number of deaths each year. The risk factors are the same for the different vascular territories and can be classified as causal, conditional or predisposing. The main objective of the present investigation was to evaluate the relationship between lipid profile and blood pressure in patients with atherosclerosis in Latin America. A literature search was carried out in the scientific databases PubMed, SciELO, Elsevier, Google Scholar, Redalyc, Springer and other sources such as the Pan American Health Organization (PAHO), World Health Organization (WHO), books, and health reports. In conclusion, arterial hypertension in most of the studies analyzed is considered as a very important risk factor for the development of cardiovascular and cerebrovascular events; alterations in the lipid profile, overweight and obesity were also considered as risk factors for atherosclerosis.La aterosclerosis es una enfermedad crónica, generalizada y progresiva que afecta sobre todo a las arterias de mediano tamaño, sus complicaciones trombóticas son causa de un significativo número de muertes cada año. Los factores de riesgo son los mismos para los distintos territorios vasculares y se pueden clasificar como causales, condicionales o predisponentes. El objetivo principal de la presente investigación fue evaluar la relación del perfil lipídico y presión arterial en pacientes con aterosclerosis en Latinoamérica Se realizó una búsqueda bibliográfica en las bases de datos científicas PubMed, SciELO, Elsevier, Google Scholar, Redalyc, Springer y otras fuentes como la Organización Panamericana de la Salud (OPS), Organización Mundial de la Salud (OMS), libros, y reportes de salud. En conclusión, la hipertensión arterial en la mayoría de los estudios analizados es considerada como un factor de riesgo muy importante para el desarrollo de eventos cardio y cerebrovasculares, las alteraciones en el perfil de lípidos, el sobrepeso y la obesidad de igual manera estuvieron consideradas como factores de riesgos para la aterosclerosis