Graded and Anisotropic Porous Materials for Broadband and Angular Maximal Acoustic Absorption.

The design of graded and anisotropic materials has been of significant interest, especially for sound absorption purposes. Together with the rise of additive manufacturing techniques, new possibilities are emerging from engineered porous micro-structures. In this work, we present a theoretical and numerical study of graded and anisotropic porous materials, for optimal broadband and angular absorption.

Acoustic wave propagation in effective graded fully anisotropic fluid layers.

This work deals with the sound wave propagation modeling in anisotropic and heterogeneous media. The considered scattering problem involves an infinite layer of finite thickness containing an anisotropic fluid whose properties can vary along the layer depth. The specular transmission and reflection of an acoustic plane wave by such a layer is modeled through the state vector formalism for the acoustic fields.

Design, fabrication and modeling of an AmBe neutron irradiator for TLD screening for neutron dose measurement in mixed radiation fields.

TLDs dosimeters are frequently presented as a viable choice for dosimetric studies when dealing with mixed neutron-gamma radiation fields. However, this choice is not without some drawbacks, because not only TLD response is highly dependent on particle type but also on neutron energy spectrum. Therefore, a correct screening and calibration of the dosimeter are required, and a simple shift from gamma screening methodology for mixed field is not suitable.

Instrumental Activities of Daily Living, Neuropsychiatric Symptoms, and Neuropsychological Impairment in Mild Cognitive Impairment.

Background: Neuropsychological deficits, neuropsychiatric symptoms, and problems with instrumental activities of daily living are common in participants with mild cognitive impairment (MCI).

Objectives: To assess how subtle to mildly impaired instrumental activities of daily living (IADLs) might be related to neuropsychological abilities (including executive control and episodic memory) and neuropsychiatric symptoms (including apathy and depression) among participants with a diagnosis of MCI.

Methods: Participants were evaluated for MCI and possible dementia at an outpatient memory clinic on the basis of a comprehensive neuropsychological evaluation, a geriatric psychiatry evaluation, a magnetic resonance image of the brain, and serum studies to evaluate for a possible reversible cause of cognitive decline.

Frailty Phenotype and Neuropsychological Test Performance: A Preliminary Analysis.

Context: Frailty is a common problem that affects adults older than 65 years. Correlations between the frailty phenotype and neuropsychological impairment have not been thoroughly researched.

Objective: To examine the association between frailty phenotype, neuropsychological screening test results, and neuropsychological domains known to characterize patients with mild cognitive impairment and dementia.