1,426 research outputs found
Studies in Sindi society the anthropology of selected Sindi communities
The purpose of this thesis is to accept the fact that there is a territory called Sind which has possessed and still possesses a regional identity and then to examine the nature of society within it. The emphasis throughout is on social and cultural characteristics related as far as possible to the various forces affecting them and operating within them, a field of study lying between Social Geography and Social Anthropology. Within Sind there exist diversities of religion, of occupation and economy but overriding these there has been until recently an undisputed social and cultural unity manifesting itself in language folk customs, mysticism and a class / caste division of society. This unity has been associated with subsistenceorientated agricultural economy in which family and kinship have aided survival in a harsh a rid environment. Sind has been a region peripheral to the mainstream of Asian change and regional and social unity remained undisturbed for centuries. Two phenomena have recently disturbed this traditional continuity, first the effects of partition of All - India and secondly urbanization in the developing state of Pakistan. The question remains whether traditional rural - based unity will remain dominant or whether a new hybrid culture will appea
Transition Metal Complexes of a-Naphthylamine Dithiocarbamate
a-Naphthylamine dithiocarbamate and its complexes with
Co(II), Ni(U), Cu(II), Ru(III) , Rh(III), Pd(II), Pt(IV), Zn(II), Cd(II)
and Hg(II) have been prepared and characterized by chemical
analysis, IR - and reflectance spectral studies and magnetic
susceptibili ty measurements. In all these complexes the dithiocarbamato
moiety acts as a chelate. The Ni(II), Cu(II) and Pd(Il)
complexes have been found to be square planar while those of
Ru(III), Rh(III) and Pt(IV) were proposed to be octahedral in
nature. The Co(II) ion seems to have a tetrahedral geometry, unlike
the other known square planar dithiocarbamato complexes of
Co(II). No definite structure, however, could be proposed for Zn(II),
Cd(II) and Hg(II) on the basis of limited studies
Wavelet transforms of meteorological parameters and gravity waves
The main purpose of this paper is to analyze some characteristics of gravity waves (GWs), and seasonal variations of atmospheric waves over Istanbul by using wavelet techniques. Daily radiosonda data of Istanbul in the troposphere and lower stratosphere (1000hPa-30hPa) between 1993 and 1997 have been considered. Wavelet analysis based on a computer simulation of data is generally close to the real data when Daubechies wavelet series are used. Daily, monthly, seasonal and annual variations of pressure heights, air temperature and deviations from mean values have been analyzed. Variations show the effects of gravity waves for different pressure levels in the troposphere. These waves lead to the meso-scale wave-form structures in spring, autumn and winter. As a result of this study, wavelet series and transforms for data construction, definition of some discontinuities and the local effects on the signal have been compared with the results of previous studies. The most similar structure between temperature, turbulence parameters and geo-potential height deviations has been defined at the 500-hPa pressure level
Quantum Fluctuations in the Chirped Pendulum
An anharmonic oscillator when driven with a fast, frequency chirped voltage
pulse can oscillate with either small or large amplitude depending on whether
the drive voltage is below or above a critical value-a well studied classical
phenomenon known as autoresonance. Using a 6 GHz superconducting resonator
embedded with a Josephson tunnel junction, we have studied for the first time
the role of noise in this non-equilibrium system and find that the width of the
threshold for capture into autoresonance decreases as the square root of T, and
saturates below 150 mK due to zero point motion of the oscillator. This unique
scaling results from the non-equilibrium excitation where fluctuations, both
quantum and classical, only determine the initial oscillator motion and not its
subsequent dynamics. We have investigated this paradigm in an electrical
circuit but our findings are applicable to all out of equilibrium nonlinear
oscillators.Comment: 5 pages, 4 figure
Global Orbit Patterns for Dynamical Systems On Finite Sets
In this paper, the study of the global orbit pattern (gop) formed by all the
periodic orbits of discrete dynamical systems on a finite set allows us to
describe precisely the behaviour of such systems. We can predict by means of
closed formulas, the number of gop of the set of all the function from to
itself. We also explore, using the brute force of computers, some subsets of
locally rigid functions on , for which interesting patterns of periodic
orbits are found.Comment: 29 pages, 3 figures. to appear in Proceedings of the International
Conference On Modeling of Engineering & Technological Problems (ICMETP), Agra
(India), 2009. Published by the American Institute of Physics, U.S.
On the nonlinear implicit complementarity problem
In this paper, we consider a new class of implicit complementarity problem
and study the existence of its solution. An iterative algorithm is also given to
find the approximate solution of the new problem and prove that this approximate
solution converges to the exact solution. Several special cases are also discussed
A Graph Theoretic Approach for Object Shape Representation in Compositional Hierarchies Using a Hybrid Generative-Descriptive Model
A graph theoretic approach is proposed for object shape representation in a
hierarchical compositional architecture called Compositional Hierarchy of Parts
(CHOP). In the proposed approach, vocabulary learning is performed using a
hybrid generative-descriptive model. First, statistical relationships between
parts are learned using a Minimum Conditional Entropy Clustering algorithm.
Then, selection of descriptive parts is defined as a frequent subgraph
discovery problem, and solved using a Minimum Description Length (MDL)
principle. Finally, part compositions are constructed by compressing the
internal data representation with discovered substructures. Shape
representation and computational complexity properties of the proposed approach
and algorithms are examined using six benchmark two-dimensional shape image
datasets. Experiments show that CHOP can employ part shareability and indexing
mechanisms for fast inference of part compositions using learned shape
vocabularies. Additionally, CHOP provides better shape retrieval performance
than the state-of-the-art shape retrieval methods.Comment: Paper : 17 pages. 13th European Conference on Computer Vision (ECCV
2014), Zurich, Switzerland, September 6-12, 2014, Proceedings, Part III, pp
566-581. Supplementary material can be downloaded from
http://link.springer.com/content/esm/chp:10.1007/978-3-319-10578-9_37/file/MediaObjects/978-3-319-10578-9_37_MOESM1_ESM.pd
RF bifurcation of a Josephson junction: microwave embedding circuit requirements
A Josephson tunnel junction which is RF-driven near a dynamical bifurcation
point can amplify quantum signals. The bifurcation point will exist robustly
only if the electrodynamic environment of the junction meets certain criteria.
In this article we develop a general formalism for dealing with the non-linear
dynamics of Josephson junction embedded in an arbitrary microwave circuit. We
find sufficient conditions for the existence of the bifurcation regime: a) the
embedding impedance of the junction need to present a resonance at a particular
frequency , with the quality factor of the resonance and the
participation ratio of the junction satisfying , b) the drive
frequency should be low frequency detuned away from by more than
.Comment: Submitted to Phys. Rev. B, 12 pages, 6 figure
Measurement of the ground-state flux diagram of three coupled qubits as a first step towards the demonstration of adiabatic quantum computation
The ground state susceptibility of a system consisting of three flux-qubits
was measured in the complete three dimensional flux space around the common
degeneracy point of the qubits. The system's Hamiltonian could be completely
reconstructed from measurements made far away from the common degeneracy point.
The subsequent measurements made around this point show complete agreement with
the theoretical predictions which follow from this Hamiltonian. The ground
state anti-crossings of the system could be read-out directly from these
measurements. This allows one to determine the ground-state flux diagram, which
provides the solution for the non-polynomial optimization problem MAXCUT
encoded in the Hamiltonian of the three-flux-qubit system. Our results show
that adiabatic quantum computation can be demonstrated with this system
provided that the energy gap and/or the speed of the read-out is increased.Comment: accepted for publication by Europhysics Letter
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