ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

An absolute cryogenic calibration source for a 2.5 GHz radiometer (1995)

Gervasi, M. ; Bonelli, G. ; Sironi, G. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 66 (1995), S. 4798-4805

add to mindlist on the mindlist

Details

ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: We describe a liquid helium-cooled absolute reference load for the calibration of a 2.5 GHz radiometer. This calibration system provides an absolute reference near the liquid helium boiling point. The accuracy of the reference source is better than 100 mK. We use this cold load to perform absolute temperature measurements of the cosmic microwave background radiation. © 1995 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1146155

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Algebraic-geometrical formulation of two-dimensional quantum gravity (1996)

Bonelli, G. ; Marchetti, P. A. ; Matone, M.

Springer

Letters in mathematical physics 36 (1996), S. 189-196

add to mindlist on the mindlist

Details

ISSN: 1573-0530

Keywords: 83E30 ; 81T30 ; 14C17 ; two-dimensional quantum gravity ; Riemann surfaces ; Painlevé I recursion relations ; Weil-Petersson two-forms ; Llouville path integral

Source: Springer Online Journal Archives 1860-2000

Topics: Mathematics , Physics

Notes: Abstract We find a volume form on moduli space of double-punctured Riemann surfaces whose integral satisfies the Painlevé I recursion relations of the genus expansion of the specific heat of 2D gravity. This allows us to express the asymptotic expansion of the specific heat as an integral on an infinite-dimensional moduli space in the spirit of the Friedan-Shenker approach. We outline a conjectural derivation of such recursion relations using the Duistermaat-Heckman theorem.