Almira Labs is a software company that develops valueadded services for the telecommunications industry. It is focused on innovative technologies that enable enterprise business and mobile and landline operators to offer next-generation voice-driven applications for all types of phones. Telephony services are built atop the proprietary Umbra framework, which is a Java API relying on the JAIN SL...

The properties of penumbral grains (PGs) in a medium-size sunspot are studied from a 4.5 hour observation series acquired on 5 June 1993 at the Swedish Vacuum Solar Telescope, La Palma. The application of an image segmentation procedure and a feature tracking algorithm on a movie of 360 frames yields proper motions, intensities, and lifetimes for a set of 469 PGs. Almost 3/4 of the PGs move tow...

Context. The sunspot umbra harbours the coolest plasma on solar surface due to presence of strong magnetic fields. atomic lines that are routinely used observe photosphere have weak signals in and often swamped by molecular lines. This makes it harder infer properties umbra, especially darkest regions.

in this paper energy bands and berry curvature of graphene was studied. desired hamiltonian regarding the next-nearest neighbors obtained by tight binding model. by using the second quantization approach, the transformation matrix is calculated and the hamiltonian of system is diagonalized. with this hamiltonian, the band structure and wave function can be calculated. by using calculated wave f...

Nesse artigo, o poema em prosa "Umbra”, de João da Cruz e Sousa (2008 [1891]), é tomado como epítome do espaço urbano derruído, reportando-o a Charles Baudelaire ao pós-simbolista “Sub-umbra”, Artur Sales (1987 [1950]), enunciação estranhamento saturnino (Giorgio Agamben) renúncia (Paul Valéry) justaposição conceito “fugacidade eterna” (BENJAMIN, 2006). Nessa dialética, imagem afloramento calcá...

A solar eclipse is a rare but spectacular natural phenomenon and furthermore it is a challenge for radiative transfer modelling. Whereas a simple one-dimensional radiative transfer model with reduced solar irradiance at the top of the atmosphere can be used to calculate the brightness during partial eclipses a much more sophisticated model is required to calculate the brightness (i.e. the diffu...

A graph that contains a Hamiltonian cycle is called a Hamiltonian graph. In this paper we compute the first and the second geometric – arithmetic indices of Hamiltonian graphs. Then we apply our results to obtain some bounds for fullerene.

This research, works with the effective Hamiltonian and the quark model. Using, the decay rates of matter-antimatter of b quark was investigated. We described the effective Hamiltonian theory which was applied to the calculation of current-current (Q1,2), QCD penguin (Q3,…,6), magnetic dipole (Q8) and electroweak penguin (Q7,…,10) decay rates. The gluonic penguin structure of hadronic decays ...

In this research we work with the effective Hamiltonian and the quark model. We investigate the decay rates of matter-antimatter of quark. We describe the effective Hamiltonian theory and apply this theory to the calculation of current-current ( ), QCD penguin ( ), magnetic dipole ( ) and electroweak penguin ( ) decay rates. The gluonic penguin structure of hadronic decays is studied thro...

Generating soft shadows in real-time is difficult. Exact methods (such as ray tracing, and multiple light source simulation) are too slow, while approximate methods often over-estimate the umbra regions. In this paper, we introduce a new algorithm based on the shadow map method to quickly and accurately render soft shadows produced by a light source. Our method builds inner and outer translucen...