T2, T-2, T2, T2 may refer to:
ČT2 (ČT Dva, Česká televize 2, "Dvojka") is Czech public television channel, operated by Česká televize. ČT2 broadcasts documentaries and nature-oriented shows. This channel also frequently shows foreign films in the original versions with Czech subtitles, including many English-language movies. It also features some of the important sports events (i.e. Olympic Games, FIFA World Cup or UEFA European Football Championship).
ČST2 launched on 10 May 1970 and was broadcast throughout Czechoslovakia in 1970. In 1973 the channel changed from black-and-white to colour.
Following the full implementation of federalism in Czechoslovakia after the Velvet Revolution, the second channel was split into two "national" channels (1990) and began broadcasting as ČTV in the Czech Republic and as the S1 in Slovakia.
On 1 January 1993, after the dissolution of Czechoslovakia, ČTV changed its name to ČT2, now the second channel of the new Česká televize (Czech Television).
ČT2 logo used until September 2007
In nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI) the term relaxation describes how signals change with time. In general signals deteriorate with time, becoming weaker and broader. The deterioration reflects the fact that the NMR signal, which results from nuclear magnetization, arises from the over-population of an excited state. Relaxation is the conversion of this non-equilibrium population to a normal population. In other words, relaxation describes how quickly spins "forget" the direction in which they are oriented. The rates of this spin relaxation can be measured in both spectroscopy and imaging applications.
The deterioration of an NMR signal is analyzed in terms of two separate processes, each with their own time constants. One process, associated with T1, is responsible for the loss of signal intensity. The other process, associated with T2, is responsible for the broadening of the signal. Stated more formally, T1 is the time constant for the physical processes responsible for the relaxation of the components of the nuclear spin magnetization vector M parallel to the external magnetic field, B0 (which is conventionally oriented along the z axis). T2 relaxation affects the components of M perpendicular to B0. In conventional NMR spectroscopy T1 determines the recycle time, the rate at which an NMR spectrum can be acquired. Values of T1 range from milliseconds to several seconds.
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tak pernah engkau hargai aku
aku memang tak sepantas dulu
kejujuranmu tak ada lagi
melebur selama-lamanya
tak pernah engkau hargai aku
aku memang tak secantik dulu
kasih sayangmu tak ada lagi
melebur selama-lamanya
tak pernah engkau hargai aku
aku memang tak sepantas dulu
kejujuranmu tak ada lagi
melebur selama-lamanya