Lastly, and perhaps most significantly, we found that the product of source activity and measurement time influenced the precision of measurements greatly, and that this factor alone could account for the higher uncertainties observed for the male cohort of the EG group versus the smelter employees. If the measure of angle DCF is 115 ° then what is the measure of angle ECF. Another thing to note is Parallel Lines/Parallel Rays/Parallel Line Segments. We observed significant differences for both calcaneus and tibia uncertainty measures (p < 0.0005) among different age groups, where the uncertainties were highest in the lowest age group (<11 years). geometry / lines and angles in plane / l, In the diagram shown, ray overline CD is perpendicular to ray overline CE. Results from univariate analyses showed that females have higher tibia uncertainty compared to males. Results from the two study groups (the EG group versus the occupationally exposed smelter employees) are compared where appropriate (i.e. ![]() In this paper, the factors that influence uncertainties in lead content in tibia (cortical bone) and calcaneus (trabecular bone) are discussed based on gender, age, and body mass index (BMI) by using analysis of variance (ANOVA) and multiple linear regression models. This detector system was used from 2009 to 2011, in a pilot study that measured the bone lead concentration of 263 environmentally exposed individuals (termed the EG group) residing in Toronto, Ontario, Canada. Study with Quizlet and memorize flashcards containing terms like When constructing a congruent line segment to CD, the ray needed for the construction must be shorter than CD, Which of the following must be true about a perpendicular bisector and the segment it bisects, Which of the following is true about the bisectors of a segment in a plane and more. Since the delivered effective dose of the bone lead system in clover-leaf geometry is small (on the order of nSv), the technique can be used to measure the bone lead of sensitive populations such as the elderly and children. After developing the clover-leaf geometry system, the system was used for the first time in a major survey in 2008 to measure the lead levels of 497 smelter employees (an occupationally exposed group with high lead levels). The emitted spectra were calculated self-consistently with the electron temperature in the corona, accounting for the feedback from the disc. Its high precision in estimating the bone lead content makes it a promising tool for the determination of the low levels of lead currently found in the general population. What is a Ray in Geometry It is a straight line which starts from one fixed point and always progress in one direction only away from that starting point. A (109)Cd K X-ray fluorescence (KXRF) measurement system consisting of four detectors in clover-leaf geometry is a non-invasive, low-radiation-dose method of measuring bone lead concentration.
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