The knowledge of the flow kinematics of polymer melts is relevant for their processing; as well as for the de sig n of molds and dies. However, the analysis of the flow behavior of polymer melts during extrusion has been…

Service-oriented software engineering (SoSE) is a new paradigm for building software systems, fostered by the availability of a new -but already mature- computing technology based on services. SoSE advances the current object-oriented and the component-based software engineering paradigms. Under that…

When a mineral surface is immersed in an aqueous solution, it develops an electric charge produced by the amphoteric dissociation of hydroxyl groups created by the hydration of the solid surface. This is one influential surface property. The complete hydration…

Guaiacum unijugum is a rare shrub endemic to a 70 km stretch of coastline extending east from San José del Cabo in Baja California and is the least well-known of the 4 species of Guaiacum in Mexico. To increase our…

This article presents a six-step problem-solving strategy, aimed at addressing three major problems in the learning and teaching of physics: 1) the demand by physics instructors for effective teaching strategies that could help in the teaching of intuitive conceptual and…

During the first half of the 18th century, Father Buenaventura Suárez performed a series of astronomical observations in the Jesuit Reductions of Paraguay. His observations were published in prestigious European journals such as the Philosophical Transactions of the Royal Society…

Two types of intraslab earthquakes in the subducted Cocos plate occur below Guerrero, Mexico, and adjacent areas: (A) steeply-dipping thrust earthquakes, and (B) normal-faulting earthquakes. Type A events are located ~10-35 km from the coast at a depth of ~35…

The cervical cancer screening programs (CCSP) have not been very efficient in the developing countries. This explains the need to foster changes on policies, standards, quality control mechanisms, evaluation and integration of new screening alternatives considered as low and high…

OBJECTIVE: To identify individual risk factors for malaria infection of inhabitants in the residual transmission focus on the Pacific coast of Oaxaca, Mexico. MATERIALS AND METHODS: A population-based, matched case-control study was conducted from January 2002 to July 2003 comparing…

OBJECTIVE: To assess Human Papillomavirus (HPV) type distribution among men ages 18 years and older recruited from three different countries utilizing a common protocol for sampling HPV detection, and to evaluate whether HPV detection differs by age and country. MATERIAL…