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Very soon it superseded all earlier collections and was much used ( celeberimo usu ) , especially in the Roman Church , says Cassiodorus . Through the use of relaxed conversations , interviews , and observations in everyday settings , case studies offer the possibility of gaining a depth of understanding that is difficult to accomplish with the more impersonal questionnaires , especially in studies involving different cultures and different languages . In 1983 and 1984 , he was the main spark plug behind the a conference to coordinated efforts between Campus Crusade , Far East Broadcasting , Trans World Radio and other broadcast ministries to develop a strategy for using radio to reach people groups that were otherwise resistant , especially in India . Faculty hiring and promotion policy , which ideally seeks a balance of abilities , in practice favors research over teaching ; the lack of institutional rewards for teaching in general , and lower level instruction in particular , inevitably works to the disadvantage of undergraduates , especially in their first two years . Canadians should maintain a high level of personal security awareness at all times , especially in commercial and public areas , such as pedestrian promenades , shopping malls , open markets , restaurants , and places frequented by foreigners.Countries and specific regions can be expected to heighten security following a terrorist threat or attack , including increased police and security presence at major airports , city centres , and transportation networks to prevent further attacks.Foreign Affairs and International Trade Canada offers a registration service for Canadians who expect to be staying in a foreign country for three months or more .