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Time gain compensation (TGC) is a setting applied in diagnostic ultrasound imaging to account for tissue attenuation. [1] By increasing the received signal intensity with depth, the artifacts in the uniformity of a B-mode image intensity are reduced.
The attenuation in the signal of ground motion intensity plays an important role in the assessment of possible strong groundshaking. A seismic wave loses energy as it propagates through the earth (seismic attenuation). This phenomenon is tied into the dispersion of the seismic energy with the distance. There are two types of dissipated energy:
Most entries (28) in the list are located in Kyoto. The documents in this list were made predominantly with a writing brush on paper and, in many cases, present important examples of calligraphy. [4] Writing was physically introduced to Japan from China in the form of inscribed artifacts at the beginning of the Christian era.
The following is a list of the world's oldest surviving physical documents. Each entry is the most ancient of each language or civilization. For example, the Narmer Palette may be the most ancient from Egypt, but there are many other surviving written documents from Egypt later than the Narmer Palette but still more ancient than the Missal of Silos.
The list of Chinese cultural relics forbidden to be exhibited abroad (Chinese: 禁止出境展览文物; pinyin: Jìnzhǐ Chūjìng Zhǎnlǎn Wénwù) comprises a list of antiquities and archaeological artifacts held by various museums and other institutions in the People's Republic of China, which the Chinese government has officially prohibited, since 2003, from being taken abroad for ...
Iterative reconstruction is an alternative algorithm that is growing in importance, as it is less sensitive to artifacts and can also correct for attenuation and depth dependent blurring. Furthermore, iterative algorithms can be made more efficacious using the Superiorization methodology.
This wall painting found in the Roman city of Pompeii is an example of a primary source about people in Pompeii in Roman times (portrait of Terentius Neo).. In the study of history as an academic discipline, a primary source (also called an original source) is an artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time ...
Restored Mogao Christian painting, possibly a representation of Jesus Christ.The original work dates back to the 9th century. The Jingjiao Documents (Chinese: 景教經典; pinyin: Jǐngjiào jīngdiǎn; also known as the Nestorian Documents or the Jesus Sutras) are a collection of Chinese language texts connected with the 7th-century mission of Alopen, a Church of the East bishop from ...