Radial-velocity measurements and sine-curve fits to the orbital radial velocity variations are presented for ten close binary systems: OO Aql, CC Com, V345 Gem, XY Leo, AM Leo, V1010 Oph, V2612 Oph, XX Sex, W UMa, and XY UMa. Most of these binaries have been observed spectroscopically before, but our data are of higher quality and consistency than in the previous studies. While most of the stud...

Interactions between all three pigment cell types are required to form the stripe pattern of adult zebrafish (Danio rerio), but their molecular nature is poorly understood. Mutations in leopard (leo), encoding Connexin 41.8 (Cx41.8), a gap junction subunit, cause a phenotypic series of spotted patterns. A new dominant allele, leo(tK3), leads to a complete loss of the pattern, suggesting a domin...

We present phase-resolved XMM-Newton data of three short period polars: V347 Pav, GG Leo and EU UMa. All three systems show one dominant accretion region which is seen for approximately half of the orbital cycle. GG Leo shows a strong dip feature in its X-ray and UV light curves which is due to absorption of X-rays from the accretion site by the accretion stream. The emission in the case of EU ...

Mobile satellite systems (MSSs) are expected to play a significant role in providing users with communication services worldwide. In such context, low earth orbit (LEO) satellite constellations seem to be a good solution to attain a global coverage and to allow the use of low-power lightweight mobile terminals. This paper analyzes the performance of a novel medium access control (MAC) scheme su...

In the Leo-III project, a new agent-based deduction system for classical higher-order logic is developed. Leo-III combines its predecessor’s concept of cooperating external specialist systems with a novel agent-based proof procedure. Key goals of the system’s development involve parallelism on various levels of the proof search, adaptability for different external specialists, and native suppor...

Whether a dwarf spheroidal galaxy is in equilibrium or being tidally disrupted by the Milky Way is an important question for the study of its dark matter content and distribution. This question is investigated using 328 recent observations from the dwarf spheroidal Leo I. For Leo I, tidal disruption is detected, at least for stars sufficiently far from the center, but the effect appears to be q...

The challenge of future mobile multimedia networks is to provide worldwide tetherless communication services. Low Earth Orbit-Mobile Satellite Systems (LEO-MSSs) will play a significant role by filling the coverage gaps of future generation terrestrial cellular networks. This lecture presents research results on demand-assignment Medium Access Control (MAC) schemes able to share efficiently LEO...

Future Low Earth Orbit (LEO) satellite networks are envisioned as distributed architectures of autonomous data processing nodes. Such ad hoc networks should deliver reliable communication channels for control commands and data among ground stations and satellites minimizing delay and power. The LEO satellite networks are different from the generic ad hoc scenario. In this paper, we first analyz...

As part of the reorganization of the JAIS Journal in 2002 the newly formed editorial team has decided to open the pages of the JAIS journal to the recipients of the Leo awardthe most distinguished award of AIS. The LEO Award was established in 1999 by the Council of the Association for Information Systems and the Executive Committee of the International Conference on Information Systems. Named ...

Leo Loeb [6] developed an experimental approach to studying cancer and pioneered techniques for tissue culture and in vitro [7] tissue transplantation which impacted early-to-mid twentieth century experimental embryology [8]. Loeb received his medical degree from the University of Zurich [9] in 1897. As part of his doctorate, he completed a thesis on the outcomes of tissue transplantation in gu...