Browsing Division of Physical and Mathematical Sciences by thesis submitted date"1990"
Now showing items 1-14 of 14
-
An experimental study of the specific heat at the glass transition during cooling
In the preceding chapters we have demonstrated the continuous cooling method as a tool for the calorimetric study at the glass transition, bringing out several novel aspects observed in the specific heat measured at the ... -
Analytic and numerical studies of neural network models of associative memory
In this thesis, we have used analytical and numerical methods to study the behaviour of neural network models for the storage, classification and associative recall of information. In Part A, we have studied a class of ... -
Dissipative dynamics of classical and quantum systems
The organization is as follows. In Chapter II we introduce specific systems of interest, such as RBCs, microemulsions, tethered surfaces, and monolayer films of smectic-A and smectic-B systems. In Chapter III we calculate ... -
Electrical and spectroscopic investigations of phase transitions in ferroelectric TAAP and DTAAP
(1) TAAP and DTAAP show pronounced anomalies in dielectric constant at TcT_cTc? and follow Curie–Weiss law in both ferro? and paraelectric phases. (2) The dielectric constant and coercive field values of TAAP depend on the ... -
Low-frequency variability of compact extragalactic radio sources.
Metre-wavelength flux-density variations in compact extragalactic radio sources on time-scales of several months to a few years indicate brightness temperatures up to 3½ orders of magnitude higher than the inverse Compton ... -
Magnetic braking as a solution to the angular momentum problem of ellptical galaxies
The following idea is explored in this thesis: the angular momentum problem of elliptical galaxies can be solved by invoking magnetic braking operating during the formative phases of protoelliptical galaxies. For reducing ... -
On the reconstruction problems in graph theory
One of the most difficult unsolved problems in graph theory is the Reconstruction Conjecture. Harary even referred to problems like the Four Colour Problem (now a theorem), the Hamiltonian Circuit Problem, and the ... -
Pulsed neclear magnetic resonance investigations of certain proton conductors
In conclusion, we have assembled a pulsed field gradient spin-echo NMR spectrometer by interfacing a home-built microprocessor-based pulsed programmer and data acquisition system with imported RF units and an electromagnet. ... -
Some studies of conformal field theories on higher genus Riemann surfaces
The CFT in two dimensions is useful to understand critical phenomena of statistical mechanics in two dimensions [1,2]. The study of CFTs on sphere and higher genus Riemann surfaces is important because of the usefulness ... -
Studies of the vibrational and magnetic properties of layered compounds
In this final and concluding chapter, we summarize the important observations presented in the previous chapters and discuss the scope of future work in the systems under study. The main points dealt with in this thesis ...