BACKGROUND Low Emission Zones (LEZs) are areas where the most polluting vehicles are restricted from entering. The effectiveness of LEZs to lower ambient exposures is under debate. This study focused on LEZs that restricted cars of Euro 1 standard without appropriate retrofitting systems from entering and estimated LEZ effects on NO2, NO, and NOx ( = NO2+NO). METHODS Continuous half-hour and ...

This is an open, prospective, longitudinal study designed to compare two cohorts of patients with advanced Parkinson's disease during 1 year, one undergoing bilateral subthalamic stimulation (STN-DBS) and the other receiving the best medical treatment (BMT), with respect to the clinical effects observed and the medical expenses produced. Assessments were done by using clinical measures and a ge...

the significant consumption of gas in the world results in the emission of greenhouse gases into atmosphere. abadan refinery has always been the biggest and oldest oil refinery in the middle east and has a variety of refined products. after six months of collecting data about pollutant concentration emitted from a stack of old furnaces of units 75 and new unit 200, the emission factor of the po...

At some point during their reproductive lives, approximately one quarter of all couples experience a period of infertility lasting over one year, leading many to seek council from an infertility specialist.1 For those who need some form of intervention to assist with conception, there are a range of available treatment options, including lifestyle modification, medication, surgery, and a variet...

The concept of a medical savings account – in its purest form, a vehicle to allow people to save money to spend on health care – was initially developed in the United States in the 1970s. In the 1980s and 1990s the concept was translated into policy in a handful of countries, either as part of a private health insurance market (South Africa and the US) or to complement publicly-financed health ...

We consider in this paper a single-item lot sizing problem with a periodic carbon emission constraint. In each period, the carbon emission constraint defines an upper limit on the average emission per product. Different modes are available, each one is characterized by its own cost and carbon emission parameters. The problem consists in selecting the modes used in each period such that no carbo...

Semantic similarity is a key issue in many computational tasks. This paper goes into the development and evaluation of two common ways of automatically calculating the semantic similarity between two words. On the one hand, such methods may depend on a manually constructed thesaurus like (Euro)WordNet. Their performance is often evaluated on the basis of a very restricted set of human similarit...

conclusions high risk patients needing avr are optimal candidates for transcatheter aortic valve implantation. tavi is a valuable solution for high risk patients needing avr. obtained results are comparable to results in transthoracic avr in standard candidates for aortic valve implantation. background transcatheter aortic valve implantation (tavi) has emerged as an alternative treatment to cla...