601 research outputs found
gamma-sky.net: Portal to the Gamma-Ray Sky
Gamma-sky.net is a novel interactive website designed for exploring the
gamma-ray sky. The Map View portion of the site is powered by the Aladin Lite
sky atlas, providing a scalable survey image tesselated onto a
three-dimensional sphere. The map allows for interactive pan and zoom
navigation as well as search queries by sky position or object name. The
default image overlay shows the gamma-ray sky observed by the Fermi-LAT
gamma-ray space telescope. Other survey images (e.g. Planck microwave images in
low/high frequency bands, ROSAT X-ray image) are available for comparison with
the gamma-ray data. Sources from major gamma-ray source catalogs of interest
(Fermi-LAT 2FHL, 3FGL and a TeV source catalog) are overlaid over the sky map
as markers. Clicking on a given source shows basic information in a popup, and
detailed pages for every source are available via the Catalog View component of
the website, including information such as source classification, spectrum and
light-curve plots, and literature references.
We intend for gamma-sky.net to be applicable for both professional
astronomers as well as the general public. The website started in early June
2016 and is being developed as an open-source, open data project on GitHub
(https://github.com/gammapy/gamma-sky). We plan to extend it to display more
gamma-ray and multi-wavelength data. Feedback and contributions are very
welcome!Comment: 6th International Meeting on High Energy Gamma-Ray Astronomy,
Heidelberg, 2016. 6 pages, 5 figures. Website: http://gamma-sky.ne
GC-444 IT course profile website
Build a Dynamic course profile website for Bachelor of science in information technology courses, that display all the information regarding the course
SELECTION OF A LEADER FOR A COMPANY BY USING PRIORITIZATION METHODS OF ANALYTIC HIERARCHY PROCESS AN ILLUSTRATION
This paper aims at selection of a leader for a company (whose founder is about to retire) with one of the popular decision making techniques. Analytic Hierarchy Process is an approach to decision making that involves structuring multiple criteria into hierarchy. There are several methods to calculate the priority vectors. Three prioritization methods are used to select a leader among three alternatives and four criteria. It is observed that Dick stands first in ranking and Tom stands second and Harry stands third in rankings. Consistency Ratio (C.R) also calculated for all pair-wise comparison matrices and analyzed.
 
Assigning and Scheduling Partially Overlapping Channels in Wireless Mesh Networks
The design and the management of Wireless Mesh Networks (WMNs) are currently associated with the most active research area within the current wireless networking paradigms. WMNs inherit features from existing wireless networking technologies such as WLANs, mobile ad hoc networks. Because WMNs are easy to deploy and with low power consumption, there is a phenomenal growing interest in seeing WMNs as the next wireless backhaul networks, and an alternative to the existing wired infrastructure.
The earliest development of WMNs had begun with single-channel single-radio mesh networks. This technology then evolved towards multi-channel single-radio mesh networks, and then to multi-channel multi-radio mesh networks. WMNs operate in North America on IEEE 802.11 2.4 GHz spectrum, which provides up to 11 channels. Despite the availability of 11 channels, only 3 (1, 6, 11) orthogonal channels can be used concurrently. The efficiency of multi-channel multi-radio wireless mesh networks can be improved with the increase of the number of channels used concurrently and of multiple radios. In this study, we investigate how to design a scalable channel assignment and a scheduling algorithm, which both exploit partially overlapping channels in order to increase the throughput in comparison with the one that can be obtained only using three orthogonal channels. In order to accurately take into account the radio interferences, we use the physical interference model to estimate the interferences among wireless links. We then introduce the definition of transmission configurations, which are sets of links, which can transmit concurrently. These links can be assigned with channels of overlapping or orthogonal in nature. We then design a TDMA based scheduling allowing a transmission configuration to transmit concurrently in a time slot.
Finally, we evaluate all our algorithms through extensive simulations. Our numerical experiments show that we can gain up to 25% for the throughput by appropriately managing all the available channels
A model of semimetallic behavior in strongly correlated electron systems
Metals with values of the resistivity and the Hall coefficient much larger
than typical ones, e.g., of sodium, are called semimetals. We suggest a model
for semimetals which takes into account the strong Coulomb repulsion of the
charge carriers, especially important in transition-metal and rare-earth
compounds. For that purpose we extend the Hubbard model by coupling one
additional orbital per site via hybridization to the Hubbard orbitals. We
calculate the spectral function, resistivity and Hall coefficient of the model
using dynamical mean-field theory. Starting from the Mott-insulating state, we
find a transition to a metal with increasing hybridization strength
(``self-doping''). In the metallic regime near the transition line to the
insulator the model shows semimetallic behavior. We compare the calculated
temperature dependence of the resistivity and the Hall coefficient with the one
found experimentally for . The comparison demonstrates that the
anomalies in the transport properties of possibly can be
assigned to Coulomb interaction effects of the charge carriers not captured by
standard band structure calculations.Comment: 9 pages RevTeX with 7 ps figures, accepted by PR
Elucidation of the Hsp90 C-terminal Inhibitor Binding Site
The Hsp90 chaperone machine is required for the folding, activation and/or stabilization of more than 50 proteins directly related to malignant progression. Hsp90 contains small molecule binding sites at both its N- and C-terminal domains, however, limited structural and biochemical data regarding the C-terminal binding site is available. In this report, the small molecule binding site in
the Hsp90 C-terminal domain was revealed by protease fingerprinting and photoaffinity labeling utilizing LC-MS/MS. The identified site was characterized by generation of a homology model for hHsp90α using the SAXS open structure of HtpG and docking the bioactive conformation of NB into the generated model. The resulting model for the bioactive conformation of NB bound to Hsp90α is presented herein
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