The time correction DUT1 (sometimes also written DUT) is the difference between Universal Time (UT1), which is defined by Earth's rotation, and Coordinated Universal Time (UTC), which is defined by a network of precision clocks.

UTC is maintained via leap seconds, such that UTC remains within the range −0.9 s < DUT1 < +0.9 s. The reason for this correction is partly that the rate of rotation of the Earth is not constant, due to tidal braking and the redistribution of mass within the Earth, including its oceans and atmosphere, and partly because the SI second (as now used for UTC) was already, when adopted, a little shorter than the current value of the second of mean solar time.

Forecast values of DUT1 are published by IERS Bulletin A.

Weekly updated values of DUT1 with 0.1 s precision are broadcast by several time signal services, including WWV and MSF. These services transmit one pulse per second of some sort. To represent positive DUT1 values from +0.1 to +0.8 seconds, the pulses sent during seconds 1 through 8 are "emphasized" in some way, generally by transmitting a double pulse. The number of emphasized pulses gives the value of DUT1. Negative DUT1 values, from −0.1 to −0.8 seconds, are similarly represented by emphasizing pulses 9 through 16. For example, a DUT1 value of −0.4 would be transmitted by emphasizing pulses 9 through 12.

Tu Long (Chinese: 屠隆; Wade-Giles: T'u Lung, 1542–1605), was a playwright and essayist who lived during the Ming Dynasty. He was born in Yin county (now Yin county, in suburb of Ningpo city, Zhejiang).

In 1577, Tu Long obtained the degree of jinshi. He later became the Chief Magistrate of Qinpu (now Qinpu county, Shanghai ). After he was libeled and quit his job, he concentrated on writing plays and essays.

Tu Long rejected the adherence to strict ancient format, he advocated that a writer must write from his heart.

Tu Long is best known internationally for his work on the art of living: Kao Pan Yu Shi, (考槃余事, "Desultory Remarks on Furnishing the Abode of the Retired Scholar"), first published in 1606. Desultory Remarks has fifteen treatises:

1. Calligraphy and books
2. Rubbings
3. Paintings
4. Paper
5. Ink
6. Brushes
7. Inkstones
8. Qin ("zithers")
9. Incense
10. Tea
11. Potted plants
12. Fish and birds
13. Mountain studio
14. Necessities of life and dress
15. Utensils of the studio

The art historian Craig Clunas suggests that the Desultory Remarks is essentially a compendium, gathered from other existing sources, such as Gao Lian's Eight Treatises on the Nurturing of Life, (for which Tu Long wrote a preface). Whether or not this is the case, Tu Long's discourses certainly had greater immediate recognition and influence; they were much more widely cited in later collections, and were a primary source for Wen Zhenheng's Treatise of Superfluous Things.

Her Imperial Highness Princess Phương Liên of Vietnam (born 3 November 1938) is a daughter of Bao Dai, the last emperor of Vietnam, and his first wife, Empress Nam Phuong.

In 1962, Phuong Lien married banker Bernard Soulain, in Chabrignac, France.