Modeling and nonlinear predictive control of solar thermal systems in district heating.

This study presents data-driven modeling and nonlinear model predictive control of solar thermal plants in district heating, for the purpose of operation optimization. The study considers the efficient operation of a solar thermal plant in Hillerød, Denmark. A dynamic model is estimated as a system of stochastic differential equations using grey-box modeling and real-world data.

[Cystic fibrosis--review].

The purpose of this paper is to give a brief overview of cystic fibrosis; its pathogenesis, diagnosis, treatment and prognosis. Cystic fibrosis is an autosomal recessive disorder, which is caused by a mutation in the CFTR protein, a chloride channel in epithelial cell membranes. More than 1500 mutations are known.

[Hyponatremia in very low birth weight infants].

Aim: Hyponatremia can potentially have serious effects in the premature infant, Therefore, it is important to recognize its causes and prevent it if possible. The aim of this study was to evaluate the causes of hyponatremia in very low birth weight (VLBW) infants cared for at the Neonatal Intensive Care Unit (NICU) of Children's Hospital Iceland.

Subjects And Methods: Retrospective descriptive study of 20 VLBW infants at the NICU of Children's Hospital Iceland, born after <30 weeks gestation with birth weight of < or =1250 g.

[Respiratory dysfunction in infants born by elective cesarean section without labor].

Objective: To evaluate the effects of gestational age at the timing of elective caesarean section (ECS) on the incidence of respiratory dysfunction in the newborn.

Study Group And Methods: This was a retrospective study. All infants born by ECS at the Landspitali-University Hospital Iceland over a 10 years period (1996-2005) at >or=37 weeks gestation and diagnosed with transient tachypnoea of the newborn (TTN) or respiratory distress syndrome (RDS) were included in the study.

[The efficacy of high frequency ventilation in severe neonatal respiratory failure].

Objective: To evaluate the efficacy of high frequency ventilation (HFV) in infants failing conventional ventilator therapy at our institution.

Study Group And Methods: Medical records of all infants managed on HFV after having failed conventional ventilator management from 1994-2004 were reviewed. Ventilatory settings, blood gases and pH just prior to starting HFV, and two and four hours after starting HFV were recorded.