1,721,018 research outputs found
Addendum to: The brightness temperature of Mercury at 150 and 240 GHz. The brightness temperature of Mars at millimetre wavelengths
No full textWe present new measurements of Mars at 1.25 and 2mm of wavelength, in addition to the previous ones performed on Mercury and already published in our paper "The brightness temperature of Mercury at 150 and 240GHz". A brief description of the observational strategy is given, and brightness temperature of the planet is reported
"A new 3He/4He refrigerator"
No full textThe sensitivity increase in bolometers obtained by operating temperatures of 1 K (helium-4) and 0.3 K (helium-3), with respect to standard bolometers cooled at pumped 4He temperature, represents in infrared and submillimetric astronomy a remarkable step forward in applications both on large ground telescopes and on stratospheric balloons. The characteristics are introduced of a double stage refrigerator (4He/3He) which allows a temperature of nearly 300 mK to be reached, starting from a temperature of 4.2 K. No moving parts and external links are involved, except for the electric leads, so as to exploit only the condensation and cryosorption cycles of 4He and 3He, without pumping on the main 4He bath.</p
La famiglia racconta (un’indagine sulle famiglie veronesi con figli piccoli) - sintesi
No full textil sistema di comunicazione umano che si realizza attraverso il linguaggio appare il più complesso fra quelli usati da qualunque specie conosciuta. fin dalle prime settimane l'infante è in grado di comunicare intenzionalmente i propri desideri. Tra i due e i tre anni la crescita del linguaggio si fa impetuosa e qualora il bambino sia stato abituato a seguire la lettura ad alta voce di racconti o storie avrà acquisito un'indelebile aspettativa di trovare nel libro nuove entusiasmanti vicende. In questo ambito si innesta l'indagine sulle famiglie della provincia di Verona con bambini in età prescolare con l'obiettivo di misurare i livelli quantitativi e qualitativi dell'attività di leggere e raccontare
COCHISE: a 2.6 meter millimetric telescope at Concordia
No full textCOCHISE is a 2.6 meter millimetric telescope, mainly devoted
to cosmological observations, located at Concordia. In this paper
we report on the installation phases and preliminary operations performed
with this instrument. At present, COCHISE is the largest telescope
located at Concordia, for that reason it represents a pathfinder
for future telescopes
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