A Frame Work for the Error Analysis of Discontinuous Finite Element Methods for Elliptic Optimal Control Problems and Applications to C0C^0 IP methods

In this article, an abstract framework for the error analysis of discontinuous Galerkin methods for control constrained optimal control problems is developed. The analysis establishes the best approximation result from a priori analysis point of view and delivers reliable and efficient a posteriori error estimators. The results are applicable to a variety of problems just under the minimal regularity possessed by the well-posed ness of the problem. Subsequently, applications of $C^0$ interior penalty methods for a boundary control problem as well as a distributed control problem governed by the biharmonic equation subject to simply supported boundary conditions are discussed through the abstract analysis. Numerical experiments illustrate the theoretical findings. Finally, we also discuss the variational discontinuous discretization method (without discretizing the control) and its corresponding error estimates.Comment: 23 pages, 5 figures, 1 tabl

Feasibility of polyethylene mariculture in the filmlined ponds

Preparation and management of polyethylene film-lined ponds for mariculture purposes and the environmental conditions of the culture system are given in this paper along with the results of milkfish culture experiments conducted in eight ponds

Growth and survival of tiger prawn, Penaeus monodon in the sandy beach ponds at Calicut

Penaeus monodon is one of the important species contributing to the traditional culture fisheries of the Southeast Asian countries and to the well established intensive or semi-intensive culture practices of the Indo-Pacific region. Culture of this species has been attempted in the polyethylene film-lined ponds made in the sandy beach. The present data on the giowth rate and percentage of recovery suggest that the culture conditions maintained in the experimental pond at Calicut were suitable for obtaining better results. Further, it is expected that better production rate can be achieved by increasing the stocking density to an optimum level which, however, could not be carried out due to scarcity of material during the present experimen

Record production of milkfish from ponds developed in sandy beach at Calicut

The milkfish, Chanos chanos, a hardy, euryhaline and fast growing species was cultured to study the production as well as survival rates in the pump-fed, polyethylene film lined ponds developed on sandy beach at Calicut Research Centre of CMFRI from July 1982 to February 1983

The intensive farming of striped Mullet, Mugil cephalus Linnaeus, in the polyethylene film-lined ponds developed on the sea shore at Calicut, Kerala

Significant advances have been made in the mariculture fin fishes in many parts of the world. In India two major cultivable fin fishes, namely, mullets and milk fish, have been used in the traditional culture practices and also in the scientific culture of fin fishes in ponds and pens. Among mullets, the striped mullet Mugil cephalus is a fast growing species and is commonly available on the east and west coasts of India. It is also an important table fish and has a good market both in the coastal and interior regions of our country

Potential resources of cultivable fish seed around Calicut area

The availability and abundance of cultivable fish seeds around Calicut area have been presented. The nature of the seed grounds and the seeds available in the different localities and the seasons of their occurrence have been described qualit8!ively and Quantitativel

Settlement and Tilt of Footings Under Eccentric Loads

A simple and approximate theory to obtain the settlement and tilt of footings subjected to eccentric loading is described. Comparison with test data on a plate and one of the existing procedures for specific site conditions demonstrate the feasibility of the technique. It is concluded that when footings are subjected to vertical loads and moments, as during a seismic event, the proposed method can be employed with advantage

Occurrence of mature Mugil cephalus along the Calicut coast

The mature Mugil cephalus has been reported from various parts of the country. This article reports on the observation of mature Mugil cephalus along the coast of Calicut for the first time. The observation on the mature Mugil cephalus from the Calicut coast is of interest especially in the context of renewed efforts to develop hatchery techniques for the species. It may be considered as one of the favourable conditions for development of hatchery at Calicut coast

Possibility of using polythene lined ponds for Mariculture in sandy beaches

Vast stretches of sandy seashores are at present lying unutilised. These sandy areas are not suited for Agricultural operation. Neither are they considered suitable for aquaculture due to the porous nature of the Soil and resultant seepage of water. However, if this seepage of water could be prevented by some means these areas could be utilised for aquaculture purposes. Experiments have been conducted at the calicut Research centre of central marine fisheries research institute in this direction. These experiments have proved that the seepage of water through the soil could be prevented by suitably lining the ponds with black polythene film. Although the use of polythene film is quite prevalent in agriculture for various purposes, it has not so far been of much use in aquaculture. The conversion of these sandy shores into productive aquaculture ponds by providing polythene lining for them has shown bright possibilities of utilising extensive areas for aquaculture and a report on this method is presented here