Basabi Bhaumik

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The problem of finding the shortest tree connecting a set of points is called the Steiner minimal tree problem and is nearly three centuries old. It has applications in transportation, computer networks, agriculture, telephony, building layout and very large scale integrated circuit (VLSI) design, among others, and is known to be NP-complete. We propose a(More)
We developed mouse monoclonal antibodies (Abs) against pepsinogen C with highly purified antigen isolated from gastric mucosa. The Abs were used to construct a two-site sandwich-type assay for pepsinogen C with time-resolved fluorometry as a detection technique. The assay has a detection limit of 0.1 microgram/L and is precise (within-run and day-to-day CVs(More)
Artificial Neural Networks, particularly the Hopfield Network have been applied to the solution of a variety of tasks formulated as optimization problems. However, the network often converges to invalid solutions, which have been attributed to an improper choice of parameters and energy functions. In this letter, we propose a fundamental change of(More)
We present a model for development of orientation selectivity in layer IV simple cells. Receptive field (RF) development in the model, is determined by diffusive cooperation and resource limited competition guided axonal growth and retraction in geniculocortical pathway. The simulated cortical RFs resemble experimental RFs. The receptive field model is(More)
In this paper, 16-bit, 50 MHz current steering DAC is designed. This DAC is implemented using TSMC 0.35 /spl mu/m technology. An optimum segmentation is done of 16-bits into binary and thermometric bits. The integral nonlinearity (INL) and differential nonlinearity (DNL) is less than 0.3 LSB and 0.1 LSB respectively. It occupies only 0.06 mm area. The(More)
Psychophysical experiments show that adaptation induced tilt aftereffect gets modulated under controlled conditions of attention. The underlying neurophysiological mechanisms are unknown. Here using a population model of primary visual cortex having detailed intrinsic and synaptic mechanisms we model orientation adaptation and the effect of attention. We(More)
Eye-specific thalamic inputs converge in the primary visual cortex (V1) and form the basis of binocular vision. For normal binocular perceptions, such as depth and stereopsis, binocularly matched orientation preference between the two eyes is required. A critical period of binocular matching of orientation preference in mice during normal development is(More)