James A. Lindsay

K. C. Jones

Piano tuning is the act of adjusting the tension of the strings of an acoustic piano so that the musical intervals between strings are in tune. The meaning of the term 'in tune', in the context of piano tuning, is not simply a particular fixed set of pitches. Fine piano tuning requires an assessment of the vibration interaction among notes, which is different for every piano, thus in practice requiring slightly different pitches from any theoretical standard. Pianos are usually tuned to a modified version of the system called equal temperament. (See Piano key frequencies for the theoretical piano tuning.) In all systems of tuning, every pitch may be derived from its relationship to a chosen fixed pitch, which is usually A440, the note A above middle C (261.626 Hz). Note that for a classical piano and musical theory, the middle C is usually labelled as C4 (as in scientific pitch notation); However, in the MIDI standard definition (like the one used in Apple's GarageBand), this middle C (261.626 Hz) is labelled C3. In practice, a MIDI software can label middle C (261.626 Hz) as C3-C5, which can cause confusions, especially for beginners. Piano tuning is done by a wide range of independent piano technicians, piano rebuilders, piano-store technical personnel, and hobbyists. Professional training and certification is available from organizations or guilds, such as the Piano Technicians Guild. Many piano manufacturers recommend that pianos be tuned twice a year.

James Stephen Lindsay (born June 8, 1979), known professionally as James A. Lindsay, is an American mathematician, author, and cultural critic. He is known for his involvement in the grievance studies affair with Peter Boghossian and Helen Pluckrose, the latter with whom he co-authored the bestselling non-fiction book Cynical Theories (2020). He is also the founder of New Discourses, a media website and educational resource on critical theory and social justice.

1950s American children's television series

Piano tuning is the act of adjusting the tension of the strings of an acoustic piano so that the musical intervals between strings are in tune. The meaning of the term 'in tune', in the context of piano tuning, is not simply a particular fixed set of pitches. Fine piano tuning requires an assessment of the vibration interaction among notes, which is different for every piano, thus in practice requiring slightly different pitches from any theoretical standard. Pianos are usually tuned to a modified version of the system called equal temperament. (See Piano key frequencies for the theoretical piano tuning.)

The YLC-2 radar (domestic designation: LLQ303, formerly known as 385) is a three-dimensional main guidance and surveillance radar developed by the . In the mid-2000s, an improved version labeled YLC-2A was deployed to the PLA. Equipped with a new Giga-flops digital signal processor, it is capable of Digital Moving Target Indication (DMTI) and Constant false alarm rate (CFAR) processing. An S-band variation called YLC-2U with similar capabilities was also developed for SAM guidance. Both of these advanced YLC-2 radars have been specifically designed to counter stealth fighters such as F-22, with a claimed range of up to 200km even in heavy ECM environment.

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1950s American television series

Yankee Hotel Foxtrot

The 214 Kangxi radicals (Chinese: 康熙部首; pinyin: Kāngxī bùshǒu), also known as the Zihui radicals, form a system of radicals (部首) of Chinese characters. The radicals are numbered in stroke count order. They are the most popular system of radicals for dictionaries that order Traditional Chinese characters (hanzi, hanja, kanji, chữ hán) by radical and stroke count. They are officially part of the Unicode encoding system for CJKV characters, in their standard order, under the coding block "Kangxi radicals", while their graphic variants are contained in the "CJK Radicals Supplement". Thus, a reference to "radical 61", for example, without additional context, refers to the 61st radical of the Kangxi Dictionary, 心; xīn "heart". Originally introduced in the 1615 Zihui (字彙), they are more commonly named in relation to the Kangxi Dictionary of 1716 (Kāngxī 康熙 being the era name for 1662–1723). The 1915 encyclopedic word dictionary Ciyuan (辭源) also uses this system. In modern times, many dictionaries that list Traditional Chinese head characters continue to use this system. For example, the Wang Li Character Dictionary of Ancient Chinese (王力古漢語字典, 2000) adopted the Kangxi radicals system. The system of 214 Kangxi radicals is based on the older system of 540 radicals used in the Han-era Shuowen Jiezi. Since 2009, the PRC government has promoted a 201-radical system (Table of Han Character Radicals, 汉字部首表) as a national standard for Simplified Chinese (see list of Xinhua Zidian radicals).

Piano tuning

Articles with unsourced statements from July 2018

Yankee Hotel Foxtrot is the fourth studio album by American rock band Wilco, first released on September 18, 2001. Recording sessions for the album began in late 2000. These sessions, which were documented for the film I Am Trying to Break Your Heart, were marred by conflicts including a switch in drummers and disagreements among the band members and engineers about songs. Despite this, the album would be completed in early 2001. The album's sound has been described as art rock and alternative rock by music critics. It was the band's first album with drummer Glenn Kotche, and last with multi-instrumentalist and songwriter Jay Bennett.

The 214 Kangxi radicals (Chinese: 康熙部首; pinyin: Kāngxī bùshǒu), also known as the Zihui radicals, form a system of radicals (部首) of Chinese characters. The radicals are numbered in stroke count order. They are the most popular system of radicals for dictionaries that order Traditional Chinese characters (hanzi, hanja, kanji, chữ hán) by radical and stroke count. They are officially part of the Unicode encoding system for CJKV characters, in their standard order, under the coding block "Kangxi radicals", while their graphic variants are contained in the "CJK Radicals Supplement". Thus, a reference to "radical 61", for example, without additional context, refers to the 61st radical of the Kangxi Dictionary, 心; xīn "heart".
Kangxi radical

YLC-2 Radar