Introduction to vascular ultrasonography

An Introduction to Sociolinguistics

Introduction to circular data

In many diverse scientific fields, the measurements are directions. For instance, a biologist may be measuring the direction of flight of a bird or the orientation of an animal. A series of such observations is called ”directional data”. Since a direction has no magnitude, these can be conveniently represented as points on the circumference of a unit circle centered at the origin or as unit ...

Introduction to Ethics

  The issues involved in this article are mainly concentrated on the origins of ethics or Moral ethics as an indepent science It has been said that this area of science was founded by Greek Philosophers after a great crisis and debates between such thinkers as Socrates, Plato and Aristotle on one side and  study of other cuitures and moral traditions, especially the Chinese and Hindu tradition...

Vascular access: the impact of ultrasonography

Vascular punctures are often necessary in critically ill patients. They are secure, but not free of complications. Ultrasonography enhances safety of the procedure by decreasing puncture attempts, complications and costs. This study reviews important publications and the puncture technique using ultrasound, bringing part of the experience of the intensive care unit of the Hospital Israelita Alb...

Vascular cognitive impairment: introduction.

One of the greatest advances in the understanding of cognitive disorders comes from the realization that Alzheimer disease (AD) and vascular cognitive impairment share common risk factors. This opens the door to a common approach to both and promises that if vascular risk factors are controlled, then not only strokes but also cognitive impairment could be prevented. It also has become evident t...