1,908 research outputs found
A New Upperbound for the Oblivious Transfer Capacity of Discrete Memoryless Channels
We derive a new upper bound on the string oblivious transfer capacity of
discrete memoryless channels. The main tool we use is the tension region of a
pair of random variables introduced in Prabhakaran and Prabhakaran (2014) where
it was used to derive upper bounds on rates of secure sampling in the source
model. In this paper, we consider secure computation of string oblivious
transfer in the channel model. Our bound is based on a monotonicity property of
the tension region in the channel model. We show that our bound strictly
improves upon the upper bound of Ahlswede and Csisz\'ar (2013).Comment: 7 pages, 3 figures, extended version of submission to IEEE
Information Theory Workshop, 201
Residual stress, phase, microstructure and mechanical property studies of ultrafine bainitic steel through laser shock peening
Linear and Nonlinear Optical Properties of Mn doped Benzimidazole Thin Films
In the present work, the Mn doped benzimidazole (BMZ) thin films were
prepared by simple chemical bath deposition technique. The material was
directly deposited as thin film on glass substrates and the metal concentration
in the solution was varied in weight percentage in order to investigate the
dopant effect on the properties of thin films. Similarly, the Mn doped BMZ
films were deposited in different solution temperature to study the effect of
deposition temperature on the properties of thin films. The PXRD and FT-IR
spectroscopy are used to study the structural and the presence of functional
groups in the BMZ medium. Depending upon the solution temperature, thickness of
the films varying from 0.6 to 1.2 {\mu}m and the optical transparency of the
samples increases with the increasing temperature up to 50 {\deg}C. Second
Harmonic Generation (SHG) efficiency of the films is measured for all the
films. Third order nonlinear optical properties of the films were analyzed
using Z-scan technique. The experimental results show that Mn doped BMZ films
exhibits saturation absorption and negative nonlinearity.Comment: This has been presented in DAE 58th Solid State Symposium held at
Thapar University, Patiala, Punjab, India. Will be published in AIP
conference proceedings soo
Private Data Transfer over a Broadcast Channel
We study the following private data transfer problem: Alice has a database of
files. Bob and Cathy want to access a file each from this database (which may
or may not be the same file), but each of them wants to ensure that their
choices of file do not get revealed even if Alice colludes with the other user.
Alice, on the other hand, wants to make sure that each of Bob and Cathy does
not learn any more information from the database than the files they demand
(the identities of which will be unknown to her). Moreover, they should not
learn any information about the other files even if they collude.
It turns out that it is impossible to accomplish this if Alice, Bob, and
Cathy have access only to private randomness and noiseless communication links.
We consider this problem when a binary erasure broadcast channel with
independent erasures is available from Alice to Bob and Cathy in addition to a
noiseless public discussion channel. We study the
file-length-per-broadcast-channel-use rate in the honest-but-curious model. We
focus on the case when the database consists of two files, and obtain the
optimal rate. We then extend to the case of larger databases, and give upper
and lower bounds on the optimal rate.Comment: To be presented at IEEE International Symposium on Information Theory
(ISIT 2015), Hong Kon
Shark resources of India, with notes on biology of a few species
The annual production of elasmobranchs in India during 1982-83 to 1984-85 period was around 59,000 t, of which sharks accounted for 37500 t (64%). Tamil Nadu, Gujarat, Maharashtra and Kerala together take the bulk
of the catch. Of the 65 species reported from Indian waters, over 20 species (families Carcharhinidae and Sphymidae) contribute to the fishery. Feeding and breeding habits, intra-uterine embryos and growth characteristics of a few species are described here
Univalent Functions involving Generalized Hypergeometric Series
The main objective of the present article is to make interconnection between
the Generalized Hyergeometric series and some subclasses of normalized analytic
functions with positive(Tailor's) coefficients in the open unit disc
.Comment: 32 Pages. arXiv admin note: substantial text overlap with
arXiv:2301.1292
Development of the Magnetic Excitations of Charge-Stripe Ordered La(2-x)Sr(x)NiO(4) on Doping Towards Checkerboard Charge Order
The magnetic excitation spectrums of charge stripe ordered La(2-x)Sr(x)NiO(4)
x = 0.45 and x = 0.4 were studied by inelastic neutron scattering. We found the
magnetic excitation spectrum of x = 0.45 from the ordered Ni^2+ S = 1 spins to
match that of checkerboard charge ordered La(1.5)Sr(0.5)NiO(4). The distinctive
asymmetry in the magnetic excitations above 40 meV was observed for both doping
levels, but an additional ferromagnetic mode was observed in x = 0.45 and not
in the x = 0.4. We discuss the origin of crossover in the excitation spectrum
between x = 0.45 and x = 0.4 with respect to discommensurations in the charge
stripe structure.Comment: 4 Figures. To be appear in the J. Kor. Phys. Soc. as a proceedings
paper from the ICM 2012 conferenc
Geometric Properties of Generalized Hypergeometric Functions
In this article, Using Hadamard product for hypergeometric function with
normalized analytic functions in the open unit disc, an operator
is introduced. Geometric
properties of hypergeometric functions are discussed for various subclasses of
univalent functions. Also, we consider an operator = z\,
_5F_4\left(^{a,\frac{b}{4},\frac{b+1}{4},\frac{b+2}{4},\frac{b+3}{4}}_{\frac{c}{4},
\frac{c+1}{4}, \frac{c+2}{4},\frac{c+3}{4}}; z\right)*f(z), where,
hypergeometric function and the is usual Hadamard product. In the main
results, conditions are determined on and such that the function
z\,
_5F_4\left(^{a,\frac{b}{4},\frac{b+1}{4},\frac{b+2}{4},\frac{b+3}{4}}_{\frac{c}{4},
\frac{c+1}{4}, \frac{c+2}{4},\frac{c+3}{4}}; z\right) is in the each of the
classes , , and
. Subsequently, conditions on and
are determined using the integral operator such that functions
belonging to and are mapped onto each of the
classes , , , and
.Comment: 44 Pages. arXiv admin note: text overlap with arXiv:2205.1338
Preliminary studies on the cephalopods collected from the Deep Scattering Layers of the Indian Exclusive Economic Zone and adjacent seas
Results of the preliminary studies on the cephalopods collected from the operation of Isaacs - Kidd Mid water Trawl net in
the Deep Scattering Layers of the Indian Exclusive Economic Zone and adjacent seas during the cruises 1-15 of FORV Sagar
Sampada are presented in this paper. Spatial, monthly and seasonal distributions of cephalopod biomass and its abundance
in the DSL have been discussed. Differences in the biomass during day and night periods are also given
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