This study numerically investigates liquid water dynamics in a novel hybrid sinusoidal flow channel of a proton exchange membrane fuel cell (PEMFC).The two-phase flow is examined using a three-dimensional, transient computational fluid dynamics (CFD) simulation employing the coupled level set and volume of fluid (VOF) method.Simulations for hybrid
Abstract OBJECTIVE Describing the obstetric care provided in public maternity hospitals during normal labour using the Bologna Score Rug in the city of Natal, Northeastern Brazil.METHOD A quantitative cross-sectional study conducted with 314 puerperal women.Data collection was carried out consecutively during the months of March to July 2014.RESULT
Tobacco use is a risk factor that predisposes to various diseases, known as chronic non-communicable diseases.It is a global health problem that causes up to 5 million deaths a year.Adolescence is the time where smokers mainly start, therefore preventive work is necessary from the early stages of life.A bibliographic review is carried out on the ma
Quantum technologies require pure states, which are often generated by extreme refrigeration.Heat-bath algorithmic cooling is the theoretically optimal refrigeration technique: it shuttles entropy from a multiparticle system to a Volleyball - Shoes - Mens thermal bath, thereby generating a quantum state with a high degree of purity.Here, we show ho
Abstract A pressing challenge for coming decades is sustainable and just management of large-scale common-pool resources including the atmosphere, biodiversity and public services.This poses a difficult collective action problem because such resources may not show signs that usage restraint is needed until tragedy is almost inevitable.To solve this