original article   introduction: human errors are of the most important issues due to the technological advances in various work settings. in medical professions, including nursing, investigation of human errors would help to find out approaches for the identification and reduction of these errors. hence, the present study aimed to identify and assess nurses' errors in emergency ward of an educ...

Background: In order to assign appropriate planning target volume (PTV) margins, each centre should measure the patient positioning deviations for their set-up techniques. At the Royal Marsden Hospital, UK, a conformal shell (cast) system is used when a stereotactic frame is not suitable. In this paper, we report on a series of measurements with the aim of obtaining the systematic and random ...

background and objectives: for total analytical error, imprecision (sd) and bias, performance goals for laboratory tests have most often been developed. a total analytical error goal requires that the combination of errors from all sources (random and systematic errors) be within some acceptable limit. materials and methods: fifty vials of sodium and potassium standards (sandos company) were ch...

The effort to reconstruct the tree of life was revolutionized by use sequences proteins and nucleic acids. Phylogenetic trees are now routinely inferred using hundreds thousands amino acid or nucleotide characters. It thus seems surprising that many aspects still controversial; conflicting results between large scale phylogenomic studies show errors remain common despite datasets. These often r...

Asymmetric systematic errors arise when there is a non-linear dependence of a result on a nuisance parameter. Their combination is traditionally done by adding positive and negative deviations separately in quadrature. There is no sound justification for this, and it is shown that indeed it is sometimes clearly inappropriate. Consistent techniques are given for this combination of errors, and a...

We consider fits to two or more datasets for which results from the same experiment share a common systematic uncertainty in addition their individual statistical errors. This is important extracting maximum information set of similar but different experiments (or under conditions) analysing datasets, as happens at LHC and other particle colliders. Two techniques can be used: one involves inver...

errors prevention and patient safety in transfusion medicine are a serious concern. errors can occur at any step in transfusion and evaluation of their root causes can be helpful for preventive measures. root cause analysis as a structured and systematic approach can be used for identification of underlying causes of adverse events. to specify system vulnerabilities and illustrate the potential...