Context. Disentangling line-of-sight alignments of young stellar populations is crucial for observational studies star-forming complexes. This task particularly problematic in a Cygnus-X subregion where several components, located at different distances, overlap: the Berkeley 87 massive cluster, poorly known [DB2001] Cl05 embedded and ON2 complex, which turn composed H II regions. Aims. We prov...

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Magneto optical traps brilliantly combine semi-classical optics with modern physics. By carefully controlling the polarization and frequency of laser beams, it is possible to trap and cool atoms down to the millikelvin range at a relatively low cost. This has opened previously inaccessible physical domains to enterprising physicists all around the world, and is responsible for some of the most ...

In recent months I have come across many instances in which someone has found what they believe is a new result, in which they evaluate in closed form a sum involving binomial coefficients or factorials. In each case they have managed to do that either by using the recent powerful method of Wilf and Zeilberger (the W–Z method) [6], or by comparing coefficients in some ad hoc algebraic identity....

PIR-A and PIR-B, paired immunoglobulin-like receptors encoded, respectively, by multiple Pira genes and a single Pirb gene in mice, are relatives of the human natural killer (NK) and Fc receptors. Monoclonal and polyclonal antibodies produced against a recombinant PIR protein identified cell surface glycoproteins of approximately 85 and approximately 120 kD on B cells, granulocytes, and macroph...

In malaria, development of resistance towards artemisinin derivatives has urged the need for new drugs or new drug combinations to tackle the drug resistant malaria. We studied the fresh root extract of Vetiver zizanioides (Linn.) Nash (VET) with a CDRI-CIMAP antimalarial α/β arteether (ART) together for their antimalarial potential. Our results showed additive to synergistic antimalarial activ...

It is believed that most giant elliptical galaxies possess nuclear black holes with masses in excess of 10 M⊙. Bondi accretion from the interstellar medium might then be expected to produce quasar-like luminosities from the nuclei of even quiescent elliptical galaxies. It is a puzzle that such luminosities are not observed. Motivated by this problem, Fabian & Rees have recently suggested that t...

Large organizations must be able to communicate with external suppliers, partners, and customers. Implementation of bidirectional E-mail and file transfers, however, may pose a significant security threat to the organization's internal systems. This article describes a network architecture for securing external communications that has been successfully implemented at Lockheed Missiles and Space...