You are considering a beam design that has dimensions of b = 16 in., h = 26 in., and d = 23.5 in. The beam is singly reinforced with all of the reinforcement in a single row. The concrete strength is 3,400 psi, and the yield strength of the reinforcement is 60,000 psi. What cross-sectional area of reinforcement is needed to achieve a strain in the reinforcement of 0.0075?
Read DetailsAn 8-year old boy is in for his annual WCC. He has just completed second grade and it has not been a very good spring for him. His original teacher left in February on maternity leave, and his new teacher thinks he needs to be evaluated for ADHD because he is having trouble sitting still, he has disruptive behaviors with talking in class, and he does not complete worksheets. While he used to enjoy school and received good report cards, he now would prefer to not attend; he has stayed home with stomachaches on a few occasions. His mother acknowledges he is a very busy and active child and rarely sits still, but she indicates she has never had any concerns about this, nor does she find his behavior at home problematic. She is not aware of any family history of ADHD, but she says he is like is father who is also a very active person and rarely likes to sit still. Dad and son do lots of things together. Mom had no difficulties with school, and she says her husband did well in school and attended college successfully as far as she knows. Utilizing DSM-5 criteria, you consider the likelihood that Steven’s behaviors fit the ADHD criteria and believe:
Read DetailsA twelve-month old boy was in for his one-year health supervision visit 3 days ago, and he received the MMR and HepB and Hib vaccines at that time. His mother chose not to give the Varivax (chickenpox) vaccine because she wanted him to get the “real thing.” She has since changed her mind and wants to come back for the vaccine as soon as possible. The appropriate timing to give this vaccine is:
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