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Studies conducted on both animals and humans show major bidirectional relationships between the circadian system and abusive drugs. It is indicated that these abusive drugs affect the central circadian pacemaker. Individuals suffering from substance abuse display disrupted rhythms. These disrupted rhythms can increase the risk for substance abuse and relapse. It is possible that genetic and/or environmental disturbances to the normal sleep and wake cycle can increase the susceptibility to addiction.

What do drug abusers show in their circadian processes?
Answer: disrupted rhythms
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The most obvious link between modern and ancient Greeks is their language, which has a documented tradition from at least the 14th century BC to the present day, albeit with a break during the Greek Dark Ages (lasting from the 11th to the 8th century BC). Scholars compare its continuity of tradition to Chinese alone. Since its inception, Hellenism was primarily a matter of common culture and the national continuity of the Greek world is a lot more certain than its demographic. Yet, Hellenism also embodied an ancestral dimension through aspects of Athenian literature that developed and influenced ideas of descent based on autochthony. During the later years of the Eastern Roman Empire, areas such as Ionia and Constantinople experienced a Hellenic revival in language, philosophy, and literature and on classical models of thought and scholarship. This revival provided a powerful impetus to the sense of cultural affinity with ancient Greece and its classical heritage. The cultural changes undergone by the Greeks are, despite a surviving common sense of ethnicity, undeniable. At the same time, the Greeks have retained their language and alphabet, certain values and cultural traditions, customs, a sense of religious and cultural difference and exclusion, (the word barbarian was used by 12th-century historian Anna Komnene to describe non-Greek speakers), a sense of Greek identity and common sense of ethnicity despite the global political and social changes of the past two millennia.

When did most of the Eastward sector of the Roman expanse choose to have a rebirth of Greek traditions and appreciations ?
Answer: During the later years of the Eastern Roman Empire
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New York City has been described as the cultural capital of the world by the diplomatic consulates of Iceland and Latvia and by New York's Baruch College. A book containing a series of essays titled New York, culture capital of the world, 1940–1965 has also been published as showcased by the National Library of Australia. In describing New York, author Tom Wolfe said, "Culture just seems to be in the air, like part of the weather."

Along with Latvia, the consulate of what country has called New York the cultural capital of the world?
Answer:
Iceland