90 research outputs found
Blockchain and its Application
In this research investigation into Blockchain Technology, its current use and other pos-sible implementation of this protocol are explored. Blockchain offers opportunities for developing advanced digital services. While current research on this becoming the most important issue which must be well addressed. As part of the fourth industrial revolution since the invention of the steam engine, electricity, information technology, Blockchain Technology has been applied in many areas such as finance, judiciary, and commerce. In this current paper, we focused on its potential Voting Application and explore how Blockchain Technology can be used to solve Health Care Issues, Land Registry, Any Fi-nancial Sector, etc. Some innovative applications of using blockchain technology for different sectors we also discussed
Detecting Low-Mass Supermassive Black Holes
We demonstrate the feasibility of uncovering supermassive black holes in
late-type, quiescent spiral galaxies by detecting signs of very low-level
nuclear activity. We use a combination of x-ray selection and multi-wavelength
follow-up. Here, we apply this technique to NGC 3184 and NGC 5457, both of type
Scd, and show that strong arguments can be made that both host AGNs.Comment: 4 pages. To appear in the proceedings of the Second Kolkata
Conference on Observational Evidence for Black Holes, Kolkata, February 200
Non-monotonic size dependence of the elastic modulus of nanocrystalline ZnO embedded in a nanocrystalline silver matrix
We present the first high pressure Raman study on nanocrystalline ZnO films
with different average crystallite sizes. The problem of low Raman signals from
nano sized particles was overcome by forming a nanocomposite of Ag and ZnO
nanoparticles. The presence of the nanodispersed Ag particles leads to a
substantial surface enhancement of the Raman signal from ZnO. We find that the
elastic modulus of nanocrystalline ZnO shows a non-monotonic dependence on the
crystallite size. We suggest that the non-monotonicity arises from an interplay
between the elastic properties of the individual grains and the intergranular
region.Comment: 10 pages, 6 figure
Low-Level Nuclear Activity in Nearby Spiral Galaxies
We are conducting a search for supermassive black holes (SMBHs) with masses
below 10^7 M_sun by looking for signs of extremely low-level nuclear activity
in nearby galaxies that are not known to be AGNs. Our survey has the following
characteristics: (a) X-ray selection using the Chandra X-ray Observatory, since
x-rays are a ubiquitous feature of AGNs; (b) Emphasis on late-type spiral and
dwarf galaxies, as the galaxies most likely to have low-mass SMBHs; (c) Use of
multiwavelength data to verify the source is an AGN; and (d) Use of the highest
angular resolution available for observations in x-rays and other bands, to
separate nuclear from off-nuclear sources and to minimize contamination by host
galaxy light. Here we show the feasibility of this technique to find AGNs by
applying it to six nearby, face-on spiral galaxies (NGC 3169, NGC 3184, NGC
4102, NGC 4647, NGC 4713, NGC 5457) for which data already exist in the Chandra
archive. All six show nuclear x-ray sources. The data as they exist at present
are ambiguous regarding the nature of the nuclear x-ray sources in NGC 4713 and
NGC 4647. We conclude, in accord with previous studies, that NGC 3169 and NGC
4102 are almost certainly AGNs. Most interestingly, a strong argument can be
made that NGC 3184 and NGC 5457, both of type Scd, host AGNs.Comment: 37 pages, 10 figures, ApJ, in press. Replaced with accepted versio
- …