Design and Fabrication of cross corrugated recuperator fins for a micro gas turbine

The National Aerospace Laboratories, Bangalore is involved in the development of a 10kW micro gas turbine (MGT). A recuperator is mandatory for an MGT to boost the thermal efficiency of the unit. This paper describes in detail the fabrication process of efficient corrugated fins for deploying in the recuperator of an MGT. The use of corrugated fins in the recuperator of the MGT gives higher effectiveness compared to conventional flat fins. The paper, in detail, describes the various materials used and the heat treatment process used for manufacturing the forming and shearing die sets. All manufacturing accuracy requirements were achieved to get the required fin geometry. The formed corrugated fins were qualified through a series of tests and large number fins were formed for use in the annular recuperator of the Micro Gas Turbine

General Account on the Problems of Marine Fisheries Research and Development in Maharashtra.

Maharashtra with a coastline of 720 km has a shelf area of about 90,000 sq.km. The EEZ confers an additional 20,000 sq.km approximately for exploitation. At present only 30% of the shelf area upto a depth of about 50 m is intensively exploited. The strategy to boost marine fish production in Maharashtra will be to increase production from the currently exploited groimds through increased effort in a phased manner, effective utilisation of the EEZ resources through offshore fishing, improvement of infrastructure facilities such as berthing, cold storage, etc

Trawl fisheries; south Kanara coast

The trawl catci and the catch rate showed great fluctuations during Jhe different years at Mangalore. Best catches were generally during February-May. Prawns constituted the single largest group, followed by flat fishes, silver-bellies, and sciaenids. High catch rates for prawns and fish were observed in the southern and northern parts of this coast respectively. The catch rate for all fish showed a decline during 1969-70 throughout the entire coast, that at Malpe, being exceptionally low, despite a four-fold increase in fishing effori there

LIDA: A Working Model of Cognition

In this paper we present the LIDA architecture as a working model of cognition. We argue that such working models are broad in scope and address real world problems in comparison to experimentally based models which focus on specific pieces of cognition. While experimentally based models are useful, we need a working model of cognition that integrates what we know from neuroscience, cognitive science and AI. The LIDA architecture provides such a working model. A LIDA based cognitive robot or software agent will be capable of multiple learning mechanisms. With artificial feelings and emotions as primary motivators and learning facilitators, such systems will ‘live’ through a developmental period during which they will learn in multiple ways to act in an effective, human-like manner in complex, dynamic, and unpredictable environments. We discuss the integration of the learning mechanisms into the existing IDA architecture as a working model of cognition

Studies on the fishery of the penaeid prawn Metapenaeus affinis (Milne Edwards) Along the Mangalore coast

Tbe fishery anl certain features of the population structures of M. affiMs caught by the trawlers fran 1962 through 1971 are reported. The fishery was chiefly i^odal and was dominated by large size groups early in the season and smaller size groups later. The maximum number of broods entering the fishery was observed to be four. Age and growth studies indicated that tbe males attain a length of about 95, 140 and 160 mm and females, lOO, 143 and 170 mm at the end of one, two and three years, respectively. The miniminn size at first maturity for males was found tp be 116 mm. The average annual instantaneous fishing mwtality was found to be 3.76 for males and 2.50 for females between one and two year olds

Gandhian Thoughts in Poems of Erode Tamilanpan

Gandhiji proved in his lifetime that through non-violence, one can overcome great injustice and he proved it in the Indian war of Independence. Gandhianism is not only what Gandhi said and did. Modernity developed throughout the world over the centuries and Ghandhianism integrated in political, economic and ecological thoughts. Gandhi said that his first great realization was that truth has many faces. There can be no single solution and no single answer to any issue. Insisting on single truth is called Anti-Ghandhianism. True solutions can only exist at the common ground where truths can be negotiated and reconciled, so Gandhianism always emphasizes dialogue. It seeks to observe the other side and move towards a possible compromise. Truth is not singular it is plural. Erode Tamilanpan has a unique place among the other poets. The purpose of this article is to study Gandhianism through his poetry