Cyber-infrastructures have transformed the practice of research. Researchers can now access distributed data worldwide with the help of cyber-infrastructures. User support services play an important role to facilitate researchers to accomplish their research goals with the help of cyber-infrastructures. However, the current user-support practices in cyberinfrastructures are not properly organiz...

Global satellite navigation systems such as GPS enable precise tracking of vessels worldwide and pervasive global networks such as the Internet allow sharing of this information almost instantaneously between locations anywhere on Earth. This ability to monitor vessels globally is a topic of current debate among those concerned with national security, those who are mainly interested in safety a...

Holes∗ S. W. Hawking DAMTP, University of Cambridge, UK Abstract It has been suggested [1] that the resolution of the information paradox for evaporating black holes is that the holes are surrounded by firewalls, bolts of outgoing radiation that would destroy any infalling observer. Such firewalls would break the CPT invariance of quantum gravity and seem to be ruled out on other grounds. A dif...

High-resolution far-infrared reflection and polarized ellipsometry, as well as Raman scattering temperature-dependent measurements are used to study spin-phonon and electron-phonon interactions in rare-earth (RE) iron borates with the R32 structure of a natural mineral huntite, namely, in RFe3(BO3)4 with R1⁄4Pr, Nd, and Sm. Pronounced peculiarities in the ω(T) dependences at the Néel temperatur...

In this paper, we study how flocking affects the accuracy and speed of individuals in the longrange “migration”. Specifically, we extend a behavior that can generate self-organized flocking in a swarm of robots to follow a homing direction sensed through the magnetic field of the Earth and evaluate how the final points reached by the flock are scattered in space and how the speed of the flock i...

Throughout immeasurable time, microorganisms evolved and accumulated remarkable physiological and functional heterogeneity, and now constitute the major reserve for genetic diversity on earth. Using metagenomics, namely genetic material recovered directly from environmental samples, this biogenetic diversification can be accessed without the need to cultivate cells. Accordingly, microbial commu...

Light can be used as a probe to explore the structure of space-time: this is usual in astrophysical and cosmological tests; however, it has been recently suggested that this can be done also in terrestrial laboratories. Namely, the Gyroscopes In General Relativity (GINGER) project aims at measuring post-Newtonian effects, such as the gravito-magnetic ones, in an Earth-based laboratory, by means...

This paper focuses on ground clutter mapping for weather radars. To achieve this, we extracted the Digital Terrain Model (DTM) using the Radio Mobile software. We considered in this study three different weather radar sites namely, Setif (Algeria), Bordeaux (France) and Dakar (Senegal). The error observed between the simulated clutter surface by the Mobile Radio software and the one obtained in...

Discovery of seven T Tauri stars and a brown dwarf candidate in the nearby TW Hydrae Association. Abstract We report the discovery of five T Tauri star systems , two of which are resolved binaries, in the vicinity of the nearest known region of recent star formation , the TW Hydrae Association. The newly discovered systems display the same signatures of youth (namely high X-ray flux, large Li a...

A numerical N–body integration of the asteroid (4660) Nereus over 3.5 Myr shows the presence of the Kozai resonance and two secular resonances inside a horseshoe orbit with Venus. This 1/1 mean motion resonance with Venus remains stable during the whole time span though a secular increase of the orbital inclination of the small body occurs due to the overlapping of two secular resonances, namel...