OBJECTIVE To evaluate the inter-observer agreement of radiological diagnosis of lower respiratory tract infections in children. METHODS Chest X-rays from 60 children younger than 5 years of age were evaluated by three physicians: a pediatric radiologist (PR), a pediatric pulmonologist (PP) and an experienced emergency pediatrician (EP). All children had sought an emergency room due to acute r...

Abstract Funding Acknowledgements Type of funding sources: None. Background The natural history thoracic aortic aneurysm (TAA) is one progressive expansion. Asymptomatic patients who do not meet criteria for repair require conservative management including ongoing surveillance, mostly carried out by contrast-enhanced computed tomography angiography (CTA). Purpose To prospectively compare image ...

Classical ways of intrusion analysis from textual communication log files are either AI-based (such as by combinations of data mining with various techniques of machine learning), or they are based on regular expressions (such as the scanners implemented in the ‘CISCO boxes’). Whereas AI-based heuristics are not analytically exact, methods based on regular expressions do not reach very far in C...

In this paper we propose a consistent and asymptotically normal estimator (CAN) of intensities 1  , 2  for a queueing network with feedback (in which a job may return to previously visited nodes) with distribution-free inter-arrival and service times. Using this estimator and its estimated variance, some   100 1 %   asymptotic confidence intervals of intensities are constructed. Also boot...

An on-line backup function for X-NAS, a clustered NAS system designed for entry-level NAS, has been developed. The on-line backup function can replicate file objects on XNAS to a remote NAS in real-time. It makes use of the virtualized global file system of X-NAS, and sends NFS write operations to both X-NAS and the remote backup NAS at the same time. The performance of the on-line backup funct...

The study of the innovative output of firms often relies on a count of patents filed at one single office of reference such as the European Patent Office (EPO). Yet, not all firms file their patents at the EPO, raising the specter of a selection bias. Using a novel dataset of the whole population of patents by Belgian firms, we show that the singleoffice count results in a selection bias that a...

In this paper we present an algorithm to further compress JPEG images without loss. The main contribution of this work is a sorting transform that allows reducing inter-block redundancy not exploited by the standard JPEG still image compression algorithm. Inter subband redundancy is also reduced by grouping of coefficients with similar statistics and entropy encoding in adaptive contexts. Teste...

The reliability of file systems depends in part on how well they propagate errors. We develop a static analysis technique, EDP, that analyzes how file systems and storage device drivers propagate error codes. Running our EDP analysis on all file systems and 3 major storage device drivers in Linux 2.6, we find that errors are often incorrectly propagated; 1153 calls (13%) drop an error code with...

In Clustered Instruction-level Parallel (ILP) processors, the function units are partitioned and resources such as register file and cache are either partitioned or replicated and then grouped together into onchip clusters. We present a novel partitioned register file architecture for clustered ILP processors which exploits the temporal locality of references to remote registers in a cluster an...

Euler's one step method is undoubtedly the simplest method for approximating the solution to an ordinary differential equation. It goes something like this: Given a first order initial value problem y = f (x, y), x ∈ (a, b) y(a) = y a we observe that defining x j = a + h(j − 1), for j = 1, 2, · · · , (N + 1) where h = (b − a)/N we have y(x k+1) − y(x k) h ≈ f (x k , y(x k)). Therefore we can wr...