BACKGROUND AND PURPOSE Early treatment is a critical determinant of successful intervention in acute stroke. The study was designed to find current patterns of stroke care by determining delays in time from onset of signs or symptoms to arrival at the emergency department and to initial evaluation by physicians and by identifying factors associated with these delays. METHODS Data were prospec...

study crust and upper mantle structure below the surface of earth is one of the important objectives of geophysics. teleseismic body waveforms have been used to infer crust and upper mantel structure. the iranian plateau is part of the alpine-himalayan orogenic belt. the zagros mountain belt in southwestern iran has resulted from the collision of arabian plate with the continental crust of cent...

We demonstrate the poor performance, with seasonal data, of existing methods for endogenously dating multiple structural breaks. Motivated by iterative nonparametric techniques, we present a new approach for estimating parametric structural break models that performs well. We suggest that iterative estimation methods are a simple but important feature of this approach to seasonal modelling. The...

CONTEXT Migration is suspected to increase risk for depressive and anxiety disorders. OBJECTIVE To test the hypothesized increase in risk for depressive and anxiety disorders after arrival in the United States among Mexican migrants. DESIGN We combined data from surveys conducted separately in Mexico and the United States that used the same diagnostic interview. Discrete time survival model...

INTRODUCTION Information regarding hospital arrival times after acute ischaemic stroke (AIS) has mainly been gathered from countries with specialised stroke units. Little data from emerging nations is available. We aim to identify factors associated with achieving hospital arrival times of less than 1, 3, and 6 hours, and analyse how arrival times are related to functional outcomes after AIS. ...

I n this issue of the Journal of the American Heart Association (JAHA), Addo and colleagues1 report on prehospital delay by using data from the South London Stroke Registry, a highquality population-based acute stroke registry that collected data on more than 2000 first-time stroke events over a 9-year period between 2002 and 2010. Among the subset of 1392 out-of-hospital stroke events for whic...

Signals generated by the December 26, 2004 Asian earthquake that can be detected by elephants are examined. Arrival time differences serve to identify two acoustic and one olfactory as potential warning signals.

This paper studies a queueing model with the finite buffer of capacity K in wireless cellular networks, which has two types of arriving calls—handoff and originating calls, both of which follow the Markov arriving process with different rates. The channel holding times of the two types of calls follow different phase-type distributions. Firstly, the joint distribution of two queue lengths is de...

In this report, we proposed a DS-CDMA-based WLAN architecture which provides integrated services. Then we studied the channel characteristics for indoor wireless LAN's. Random amplitude, path delay and phase sequences of the channel response have been studied extensively here.For the distribution of the arrival time sequence, it is found that the modi ed Poisson model: K Model is better over th...

PURPOSE This study was aimed to evaluate the effect of time of surgery for acute appendicitis on surgical outcomes to optimize the timing of appendectomies. METHODS Medical records of patients who underwent an appendectomy were reviewed to obtain data on time of symptom onset, time of hospital presentation, and start times of surgery. Surgical findings were used to define appendicitis as eith...