A central purpose of knowledge acquisition technology is to assist with the formulation of domain models that underlie knowledge systems. In this article we examine the model formulation process itself as a problem-solving task. Drawing from AI research in qualitative reasoning about physical systems, we characterize the model formulation task in terms of the inputs, the reasoning subtasks, and...

objective: the purpose of this study was to determine the level of knowledge of folic acid supplementation amongst iranian pregnant women. materials and methods: we selected 322 women through simple randomized method in a cross section study. data was gathered on the base of questionnaire and interview. statistical analysis was performed using spss software. the value of p<0.05 was considered a...

It has been well established that increased maternal education, income, and social status contribute to increased birth weight, as well as reduced risk for low or very low birth weight offspring. However, there remains controversy about the mechanism(s) for this effect, as well as the interactions between these factors, maternal age, and race. Presented here is the analysis of a large, recent s...

ntroduction: electrocautery device is one of the most widely used electronic devices in operating rooms despite its advantages in operations, production risks such as the halo of smoke above the operating position. the smoke with hazardous substances,cause to transmitting hiv, hpv and hepatitis and complications such as respiratory distress, nausea and vomiting, eye irritation, headache, and so...

background: studies show that about 90% of accidents occur because of unsafe behavior and human errors. even if workers do not have the right knowledge, attitude and behavior toward safety measures in a safe workplace, all efforts for an accident-free workplace will be in vain. this study aims to determine the level of knowledge, attitude and behavior of workers toward occupational health and s...