A boolean expression is in read-once form if each of its variables appears exactly once. When the variables denote independent events in a probability space, the probability of the event denoted by the whole expression in read-once form can be computed in polynomial time (whereas the general problem for arbitrary expressions is #P-complete). Known approaches to checking read-once property seem ...

Speaker: Albert Atserias (Universitat Politecnica de Catalunya) Title: Mini-tutorial on semialgebraic proof systems Abstract: A variety of semialgebraic proof systems, i.e. those operating with polynomial inequalities over the reals, were defined in the last two decades to reason about optimality or near optimality in combinatorial optimization problems. In this mini-tutorial we overview their ...

INTRODUCTION Tim earliest palaeopathological studies were made in the eighteenth century and were concerned with the results of trauma and disease in fossil animals. In 1825 Granville made a careful macroscopic study of a Ptolemaic mummy and diagnosed ovarian dropsy: this was almost certainly an instance of cystadenocarcinoma of the ovary. Twenty-seven years later Johan Czermak, a distinguished...

Efforts during the past 5 to 10 years to increase the proportion of patients in the United States who receive maintenance hemodialysis via a native arteriovenous (AV) fistula have been successful. In 2008, 55% of prevalent patients in the United State were undergoing dialysis via a fistula compared with only 35% in 2003 (1,2). Despite this substantial progress, challenges remain, among the most...

OBJECTIVE Mucopolysaccharidosis VI (MPS VI; Maroteaux-Lamy syndrome) is a lysosomal storage disease caused by a deficiency of the enzyme N-acetylgalactosamine 4-sulfatase (ASB). This enzyme deficiency leads to a progressive disorder with multiple tissue and organ involvement. The disease is rare and is heterogeneous in its clinical presentation and progression. A potential treatment for this di...

Omodysplasia, a heterogeneous osteochondrodysplasia, was first observed by Barrow and Fitzsimmons (1984), but better delineated and named by Maroteaux et al. (1989). It was only in 1991, with Borochowitz et al., that two forms were recognized: autosomal dominant and recessive. Recently, Elçioglu (2004) studied five cases of recessive Omodysplasia and made an excellent review of the literature b...

PURPOSE OF THE STUDY The characteristics, diagnosis, classification and treatment options of rare fractures of the sacrum known as suicidal jumper's fractures are presented based on six illustrative cases. MATERIAL AND METHODS Jumper's fractures of the sacrum are characterised by an H- or U-shaped fracture line in the upper sacrum, usually involving the S1-S2 region. Typically, the anterior s...

1699-258X/$ see front matter © 2010 Elsevier España, S.L. All rights reserved. Since ancient times, “skeletal deformities” have aroused great fascination that goes far beyond the field of medicine, penetrating into areas such as anthropology and art. In addition to the identification-rejection feeling they provoke, such interest could be due to the intrinsic complexity of these disorders. This ...

The current understanding of droplet generation processes from liquid films is reviewed. Films are defined as liquids with one free and one wall-bound surface. In many of the systems where films occur, atomization is an undesirable side-effect of the two-phase flow. The motivation for this study, however, is a process where atomization from the film is the goal—a gas-centered swirl coaxial rock...