3,521 research outputs found
Performance Assessment of Polyphase Sequences Using Cyclic Algorithm
Polyphase Sequences (known as P1, P2, Px, Frank) exist for a square integer length with good auto correlation properties are helpful in the several applications. Unlike the Barker and Binary Sequences which exist for certain length and exhibits a maximum of two digit merit factor. The Integrated Sidelobe level (ISL) is often used to define excellence of the autocorrelation properties of given Polyphase sequence. In this paper, we present the application of Cyclic Algorithm named CA which minimizes the ISL (Integrated Sidelobe Level) related metric which in turn improve the Merit factor to a greater extent is main thing in applications like RADAR, SONAR and communications. To illustrate the performance of the P1, P2, Px, Frank sequences when cyclic Algorithm is applied. we presented a number of examples for integer lengths. CA(Px) sequence exhibits the good Merit Factor among all the Polyphase sequences that are considered
Overexpression Analysis of emv2 gene coding for Late Embryogenesis Abundant Protein from Vigna radiata (Wilczek)
Late embryogenesis abundant (LEA) proteins are speculated to protect against water stress deficit in plants. An over expression system for mungbean late embryogenesis abundant protein, emv2 was constructed in a pET29a vector, designated pET-emv2 which is responsible for higher expression under the transcriptional/translational control of T7/lac promoter incorporated in the Escherichia coli BL21 (DE3).Induction protocol was optimized for pET recombinants harboring the target gene. Overexpressed EMV2 protein was purified to homogeneity and the protein profile monitored by SDS-PAGE
Unprecedented heavy landings of juvenile Kiddy shrimp, Parapenaeopsis stylifera along Karnataka coast
Parapenaeopsis stylifera is one of the most
abundant and highly valued shrimp species in India.
It forms about 20% of the penaeid shrimp catch of
Karnataka with the period from January to June
contributing the majority of the catch. In general,
the post-monsoon months of August to December is
considered as a lean period for P. stylifera. During
this period single day fishing trawlers land catch of
a mixture of fish, prawns, stomatopods and other
crustaceans. The contribution of prawns in the catch
is around 10 to 20%
Growth status and site quality of different seed production areas of teak (Tectona grandis L. f) in Karnataka, India
In the present study 20 SPAs of teak distributed in southern, central and northern parts of Karnataka, India are selected. Phenotypic parameters of standing trees of different SPAs were recorded. Further, seed yield was also recorded and compared with site quality and stand growth parameters. Result showed that there was a greater variation among SPAs for phenotypic growth characters as well as site quality. The overall growth of SPAs of Madikeri zone (Southern region) was found to be superior with respect to tree height, clear bole height and DBH.SPAs belonged to Dandeli (Northern region) recorded more DBH and nearly round stem. SPAs of Yallapur seed zone showed comparatively less growth over Madikeri zone. SPA of Dandeli zone recorded the more tree volume and top height, followed by SPA of Madikeri zone. Considering site quality of different SPAs, all the studied SPAs of Karnataka are growing under relatively poor site conditions. Sixteen out of twenty SPAs, nearly 80% were growing in areas with site quality classes IV and V. Interestingly, none of the studied SPAs belonged to either class I or II. Association study showed that tree height (r=0.403) and clear bole height (r=0.412) showed positive relationship with seed yield. Furthermore, site quality showed a weak positive relationship with seed yield (R2 =0.052) among SPAs indicating poor site quality could be a major factor for low seed yield. It is concluded that SPAs of Madikeri and Dandeli zones performed better in growth and stem form. Therefore, it is suggested to collect quality seeds from these seed zones
Force induced triple point for interacting polymers
We show the existence of a force induced triple point in an interacting
polymer problem that allows two zero-force thermal phase transitions. The phase
diagrams for three different models of mutually attracting but self avoiding
polymers are presented. One of these models has an intermediate phase and it
shows a triple point but not the others. A general phase diagram with
multicritical points in an extended parameter space is also discussed.Comment: 4 pages, 8 figures, revtex
Consistent Truncation to Three Dimensional (Super-)gravity
For a general three dimensional theory of (super-)gravity coupled to
arbitrary matter fields with arbitrary set of higher derivative terms in the
effective action, we give an algorithm for consistently truncating the theory
to a theory of pure (super-)gravity with the gravitational sector containing
only Einstein-Hilbert, cosmological constant and Chern-Simons terms. We also
outline the procedure for finding the parameters of the truncated theory. As an
example we consider dimensional reduction on S^2 of the 5-dimensional minimal
supergravity with curvature squared terms and obtain the truncated theory
without any curvature squared terms. This truncated theory reproduces correctly
the exact central charge of the boundary CFT.Comment: LaTeX file, 22 page
Dynamics of Crossover from a Chaotic to a Power Law State in Jerky Flow
We study the dynamics of an intriguing crossover from a chaotic to a power
law state as a function of strain rate within the context of a recently
introduced model which reproduces the crossover. While the chaotic regime has a
small set of positive Lyapunov exponents, interestingly, the scaling regime has
a power law distribution of null exponents which also exhibits a power law. The
slow manifold analysis of the model shows that while a large proportion of
dislocations are pinned in the chaotic regime, most of them are pushed to the
threshold of unpinning in the scaling regime, thus providing insight into the
mechanism of crossover.Comment: 5 pages, 3 figures. In print in Phy. Rev. E Rapid Communication
Exact Tagged Particle Correlations in the Random Average Process
We study analytically the correlations between the positions of tagged
particles in the random average process, an interacting particle system in one
dimension. We show that in the steady state the mean squared auto-fluctuation
of a tracer particle grows subdiffusively as for large
time t in the absence of external bias, but grows diffusively
in the presence of a nonzero bias. The prefactors of the subdiffusive and
diffusive growths as well as the universal scaling function describing the
crossover between them are computed exactly. We also compute ,
the mean squared fluctuation in the position difference of two tagged particles
separated by a fixed tag shift r in the steady state and show that the external
bias has a dramatic effect in the time dependence of . For fixed
r, increases monotonically with t in absence of bias but has a
non-monotonic dependence on t in presence of bias. Similarities and differences
with the simple exclusion process are also discussed.Comment: 10 pages, 2 figures, revte
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