“Japan was ruled by emperors, but over time, they began to lose power, and eventually landowning families set up a feudal system. Under the system, high nobles gave land to lesser nobles in return for their loyalty and military service. At the bottom of the social ladder, peasants farmed nobles’ estates in exchange for protection. By the 1100s, armies of local nobles had begun fighting for control of Japan. Minamoto Yoritomo became Japan’s first shogun, or military leader. Landowning warriors called samurai supported the shogun. Although the emperor kept his title, the shoguns held the real power.” Who held the real power in feudal Japan and how did that shift of power happen?

Afull irb committee meeting is convened and one agenda item is a new research proposal to evaluate how mothers interact with their learning-disabled child. the inclusion criteria require the children to be a minimum of five years of age. the protocol requires the mother of the child to look at the child without any expression and not to talk to the child for three minutes. the committee determined that the mother's required task may upset the child. the irb approved the study with appropriate language in the parental permission form regarding the possibility that children might become upset. after the start of the study, the principal investigator reports to the irb that, as expected, one of the children became upset. the incident was handled according to the protocol and the child is fine. what should the irb do with regard to this report?

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.

The health care system in is referred to as a singleminus−payer health care system, and is a system in which the government provides national health insurance to all residents.