A simple and compact telecentric lens based on two hemispheric optical elements arranged in a formation resembling an "hourglass" is proposed and evaluated. Our modeling and experimental results show the ability of this lens in achieving high resolution over a large field of view. A prototype with 500 μm total thickness is built using silicon micromachining methods for a center wavelength of 15...

A detailed study of the Hourglass Nebula in the M8 star forming region is presented. The study is mainly based on recent subarcsec-resolution JHKs images taken at Las Campanas Observatory and complemented with archival HST images and longslit spectroscopy retrieved from the ESO Archive Facility. Using the new numerical code CHORIZOS, we estimate the distance to the earliest stars in the region ...

Until now, porting IP to different layer 2 technologies has been fairly easy since they were relatively similar. The work done at 6LoWPAN has shown that adapting IPv6 to LoWPAN networks is a more complex task. In some sense, 6LoWPAN and RPL have changed the nature of IP. IPv6 is moving away from an interconnection paradigm, highlighted by the famous hourglass model where the same protocol is pr...

We previously proposed that entanglement across a planar surface can be obtained from the partition function on Euclidean hourglass geometry. Here we extend prescription to spherical entangling surfaces in conformal field theory. use evaluate log terms entropy of theory two dimensions, conformally coupled scalar four and Maxwell dimensions. For reproduce extractable by Soni Trivedi. take this a...

Axial distributions of plasma and floating potentials, electron number density and the electron energy distribution function (EEDF) have been measured in the double layer (DL) region of an He discharge constriction. Excitation processes in the constriction region are studied. Using a linearization method for the nonstationary balance equations and choosing appropriate discharge conditions, ...