Apparent life-threatening events (ALTEs) are frightening to caregivers and clinicians alike. This article provides a comprehensive review of the causes, management, and consequences of ALTEs. The information provided was collected from an extensive literature review using the search terms ALTE, sudden infant death syndrome, and apnea. There is a wide array of contributing factors to ALTE syndro...

In previous work on undoped MFe(2)As(2), partial drops in the resistivity indicative of traces of superconductivity have been observed for some samples with M =  Ba (T(c)∼20 K, up to 25% drop in ρ) and M =  Ca (T(c)∼10 K, up to 45% drop in ρ). A complete drop in the resistivity to ρ = 0, along with a finite fraction of Meissner flux expulsion, has been observed for M  = Sr, T(c) = 22 K. Using I...

We show that when bulk graphene breaks into n-type and p-type puddles, the in-plane resistivity becomes strongly field dependent in the presence of a perpendicular magnetic field even if homogeneous graphene has a field-independent resistivity. We calculate the longitudinal resistivity xx and Hall resistivity xy as a function of field for this system using the effective-medium approximation. Th...

geophysical techniques remain the only ways to remotely and non-destructively sense the earth’s near subsurface and as such have the most promising prospect for rapid and accurate detection of underground tunnels. today, electrical resistivity and seismic refraction geophysical methods have been greatly developed to identify structures and underground cavities. in this study, the ability of the...

Abstract This paper presents a numerical model for the simulation of resistance sintering. It involves an electro-thermo-mechanical coupling, where each is simulated as continuum with influence porosities included through distribution relative density, i.e. ratio apparent density to that corresponding fully dense bulk material. For mechanical response, this plasticity based on porous formulatio...

This study provides an evaluation of the utility and resolution of different geoelectrical methods in mapping contaminant distribution in the subsurface, and provides a window into the processes that may control their response at a site in Central Ž . Ž . Michigan. In situ and 2D surface resistivity, ground penetrating radar GPR , and electromagnetic methods EM constrained Ž . by soil boring da...

The objective of this study was to develop a methodology by which the risk from major accident hazards to the environment can be assessed or quantified. An index method, the Environmental Risk Index (ERI), has been developed based on an existing method, the Environmental Hazard Index (EHI), and the Department of the Environment (DoE) definitions of events that would constitute a major accident ...

Risk generated by uncertainty about future management policies appears to affect firms’ cost of borrowing. In a sample of S&P 1500 firms between 1987 and 2012, CDS spreads, loan spreads and bond yield spreads all decline over the first three years of CEO tenure, holding other macroeconomic, firm, and security level factors constant. This decline occurs regardless of the reason for the prior CEO...

Continuous vertical electrical sounding (CVES) surveys were carried out on KNUST campus to ascertain the electrical properties of the formations in the area in order to determine its suitability for the construction of heavy structures. Eight 2D CVES profiles were conducted at the site in the study area with a wenner array using electrode separations of 1, 2.5 and 4 m. The apparent resistivity ...