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The central core of many industrial companies is the process of production and distribution. A recurring problem is to match the production rate to the rate of final consumer sales. It is well known that factory production rate often fluctuates more widely than does the actual consumer purchase rate. It has often been observed that a distribution system of(More)
Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrated a correlation between the arrival directions of cosmic rays with energy above 6 x 10(19) electron volts and the positions of active galactic nuclei (AGN) lying within approximately 75 megaparsecs. We rejected the hypothesis of an isotropic distribution of these(More)
One of the most common syndromes in product development is the unplanned allocation of resources to fix problems discovered late in a product's development cycle or firefighting. While it has been widely criticized in both the popular and scholarly literature, fire fighting is a common occurrence in most product development organizations. In this paper we(More)
Though often analyzed separately, supply chain instability and customer demand interact through product availability. We investigate the feedback between supply chain performance and demand variability in a model grounded in a first-hand study of the hybrid push–pull production system used by a major semiconductor manufacturer. While customers' response to(More)
– Nous´ etudions le mouvement Brownien fractionnaire en temps multifractal, un modèle de processus multifractal proposé recemment dans le cadre de l'´ etude de sériesfinancì eres. Notre intérêt porte sur les propriétés statistiques des coefficients d'ondelette issus de la décom-position de ces processus. Parmi ces propriétés nous nous intéressonsparticulì(More)
Nucleotide sequences of the HA1 subunit of influenza B viruses isolated in Portugal between 1994 and 2003 influenza winter seasons were analyzed by the Neighbor-Joining algorithm and rates of HA1 evolution estimated by linear regression. From 1994 to 2002, all influenza B viruses studied were of the Yamagata lineage. Strains isolated from 1994 to 1996, 1996(More)
Wireless Sensor Networks are an emerging technology which has been recently adopted in many applications. Due to its wireless nature, the analysis of the radio propagation models plays an important role for performance evaluation in both theoretical and practical aspects. In this regards, path loss exponent is one of the most important parameter which has(More)
INTRODUCTION The aim of this study was detect the presence of human papillomavirus and investigate the prevalence and distribution of the HPV-6, 11, 16 and 18 genotypes among HIV-1 positive and negative women. METHODS Samples of cervical smears from 98 women were analyzed using the nested polymerase chain reaction for the presence of HPV and using the(More)