𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The sunspot activity before 17th century

✍ Scribed by Xu Zhentao; Chen Bing; Jiang Yiaotiao

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
134 KB
Volume
31
Category
Article
ISSN
0083-6656

No coin nor oath required. For personal study only.

πŸ“œ SIMILAR VOLUMES

The 17-month periodicity of sunspot acti
The 17-month periodicity of sunspot activity
✍ M. Akioka; J. Kubota; M. Suzuki; K. Ichimoto; I. Tohmura πŸ“‚ Article πŸ“… 1987 πŸ› Springer 🌐 English βš– 199 KB

A statistical study of sunspot activity during 1969 to 1986 was carried out by using the number of sunspot groups and their areas. We found a 17-month periodicity, which is consistent with the 500-day periodicity of flare occurrence (Ichimoto et aL, 1985). The short-term periodicity of sunspot acti

Solar rotation velocity as determined fr
Solar rotation velocity as determined from sunspot drawings of J. Hevelius in the 17th century
✍ Claudia Abarbanell; Hubertus WΓΆhl πŸ“‚ Article πŸ“… 1981 πŸ› Springer 🌐 English βš– 291 KB

Using two original copies of Hevelius' 'Selenographia' and reducing spot positions with two different methods, we found that the solar angular rotation velocity at the beginning of the Maunder minimum was about the same as today. The gradient of the differential rotation was slightly steeper than gi

Tuberculosis on the 17th century man-of-
Tuberculosis on the 17th century man-of-war Kronan
✍ Emilia Nuorala πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 105 KB πŸ‘ 2 views

This study evaluates the possibility of identifying tuberculosis by means of molecular analysis in bone material with no morphological traces of the disease. A diaphysis of a long bone from a male individual with no morphological traces of tuberculosis was analysed. The bone was recovered from a 17t