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Eustachian tube dysfunction can be caused by a number of factors. Some common causes include the flu, allergies, a cold, and sinus infections. [6] In patients with chronic ear disease such as cholesteatoma and chronic discharge, studies showed that they have obstructive pathology at the ear side of the Eustachian tube.
In 1961, the American neuroscientist Allan H. Frey studied this phenomenon and was the first to publish information on the nature of the microwave auditory effect. [1] [2] The cause is thought to be thermoelastic expansion of portions of the auditory apparatus, [3] although competing theories explain the results of holographic interferometry ...
The dissolution of the Soviet Union ended the Cold War and led to world that is widely considered as uni polar, with the United States being the sole remaining hyperpower, but many other rising powers hold great influence in the world and are certainly superpowers. The Cold War defined the political role of the United States after World War II.
The aftermath of World War II saw the rise of two global superpowers, the United States (U.S.) and the Soviet Union (USSR). The aftermath of World War II was also defined by the rising threat of nuclear warfare, the creation and implementation of the United Nations as an intergovernmental organization, and the decolonization of Asia, Oceania, South America and Africa by European and East Asian ...
For example, very curvy ear canals, narrow ear canals, or surgical ears are more prone to earwax buildup. When wax builds up, it causes muffled hearing, tinnitus, or aural fullness (plugged-up ...
Considering the post-war era as equivalent to the Cold War era, post-war sometimes includes the 1980s, putting the end at 26 December 1991, with the dissolution of the Soviet Union. [ 1 ] [ 2 ] The 1990s and the 21st century are sometimes described as part of the post-war era, but the more specific phrase " Post–Cold War era " is often ...
Cold War – period of political and military tension that occurred after World War II between powers in the Western Bloc (the United States, its NATO allies and others) and powers in the Eastern Bloc (the Soviet Union and its allies in the Warsaw Pact). Historians have not fully agreed on the dates, but 1947–1991 is common.
A study conducted early in the Iraq war, for instance, found that two-thirds of deployed Marines had killed an enemy combatant, more than half had handled human remains, and 28 percent felt responsible for the death of an Iraqi civilian. If the resulting moral injury is largely invisible to outsiders, its effects are more apparent.