BACKGROUND Analysis was undertaken on data from randomly selected participants of a bio-medical cohort study to assess representativeness. The research hypotheses was that there was no difference in participation and non-participations in terms of health-related indicators (smoking, alcohol use, body mass index, physical activity, blood pressure and cholesterol readings and overall health statu...

Obesity is an endemic health problem in most developed countries, requiring serious public health attention. The first Portuguese nationwide representative survey about obesity (with objective anthropometric measurement) was undertaken from 1995 to 1998. This paper presents data coming from the second and most recent nationwide representative study of obesity, with objective measurement of weig...

this paper tries to determine an optimum condition for the flotation operation of the alborz-sharghi coal washing plant. for this purpose, a series of comprehensive experiments have been conducted on representative samples from feed of the flotation system of the plant. four operational variables such as the collector dosage (fuel oil), the frother dosages (mibc), the pulp density percent and t...

Responsiveness to antihypertensive medications was investigated cross-sectionally in 559 individuals comprising all treated hypertensive patients identified within a representative sample (n = 3,532, aged 40-70 years) of the Jewish population in Israel. A rate of dosage score (a summed ranking of dosages of all drugs taken) of two or more increased significantly with increasing levels of body m...

In his famous book " Democracy and its Critics " (1989), Robert A. Dahl argues that, historically speaking, there have been two transformations of democracy. These transformations have brought about different models of democratic governance and different interpretations of the concept of democracy. By the fi rst transformation Dahl refers to the the emergence of the classical model of democracy...

This study examined the effect of follow-up intervention on periodontal health of workers on the basis of clinical assessment and a laboratory test. Toothbrushing instruction was given to 26 workers (41.4 +/- 7.8 yr of age). In the experimental group (EG), 13 workers received re-instruction and reminder messages after the initial intervention. The remaining 13 workers, who served as a control g...

This paper tries to determine an optimum condition for the flotation operation of the Alborz-Sharghi coal washing plant. For this purpose, a series of comprehensive experiments have been conducted on representative samples from feed of the flotation system of the plant. Four operational variables such as the collector dosage (Fuel oil), the frother dosages (MIBC), the pulp density percent and t...