List of publications from CMFRI on Andaman and Nicobar Islands 1961-1980

List of publications from CMFRI on Andaman and Nicobar Islands 1961-1980 is appended

Linkages between fishermen and researchers in marine fisheries-an analysis

Fisheries play an important role in our country's economic development. In India one million active fishermen are engaged in marine fishing, with about 0.2 million in mechanized sector, 0.17 million in motorized sector and the rest in the artisanal sector. Among the fisher folk engaged in marine fisheries, about 0.7 million work as labourers of whom 65.00 per cent are engaged in artisanal fishin

Analysis of the linkages between fishermen and extension personnel in marine fisheries in Kerala

In marine fisheries the linkages between the fishermen and the extension system play an important role in technology transfer and its adoption. Research studies on linkages in marine fisheries are very limited. So thls study was taken up to find out the linkage activities through which both the systems are contacting each other. It was found that 60 % of the fishermen had medium level of linkage of with the extension personnel followed by low (21.33%) and high (19.34%) linkage level. The paper also highlights the frequency of linkage and the level of perception about linkages between the two systems. The paper implies that the linkage activities need to be enhanced so as to derive an overall development in the fisheries sector

Distributed adaptive signal processing for frequency estimation

It is widely recognised that future smart grids will heavily rely upon intelligent communication and signal processing as enabling technologies for their operation. Traditional tools for power system analysis, which have been built from a circuit theory perspective, are a good match for balanced system conditions. However, the unprecedented changes that are imposed by smart grid requirements, are pushing the limits of these old paradigms. To this end, we provide new signal processing perspectives to address some fundamental operations in power systems such as frequency estimation, regulation and fault detection. Firstly, motivated by our finding that any excursion from nominal power system conditions results in a degree of non-circularity in the measured variables, we cast the frequency estimation problem into a distributed estimation framework for noncircular complex random variables. Next, we derive the required next generation widely linear, frequency estimators which incorporate the so-called augmented data statistics and cater for the noncircularity and a widely linear nature of system functions. Uniquely, we also show that by virtue of augmented complex statistics, it is possible to treat frequency tracking and fault detection in a unified way. To address the ever shortening time-scales in future frequency regulation tasks, the developed distributed widely linear frequency estimators are equipped with the ability to compensate for the fewer available temporal voltage data by exploiting spatial diversity in wide area measurements. This contribution is further supported by new physically meaningful theoretical results on the statistical behavior of distributed adaptive filters. Our approach avoids the current restrictive assumptions routinely employed to simplify the analysis by making use of the collaborative learning strategies of distributed agents. The efficacy of the proposed distributed frequency estimators over standard strictly linear and stand-alone algorithms is illustrated in case studies over synthetic and real-world three-phase measurements. An overarching theme in this thesis is the elucidation of underlying commonalities between different methodologies employed in classical power engineering and signal processing. By revisiting fundamental power system ideas within the framework of augmented complex statistics, we provide a physically meaningful signal processing perspective of three-phase transforms and reveal their intimate connections with spatial discrete Fourier transform (DFT), optimal dimensionality reduction and frequency demodulation techniques. Moreover, under the widely linear framework, we also show that the two most widely used frequency estimators in the power grid are in fact special cases of frequency demodulation techniques. Finally, revisiting classic estimation problems in power engineering through the lens of non-circular complex estimation has made it possible to develop a new self-stabilising adaptive three-phase transformation which enables algorithms designed for balanced operating conditions to be straightforwardly implemented in a variety of real-world unbalanced operating conditions. This thesis therefore aims to help bridge the gap between signal processing and power communities by providing power system designers with advanced estimation algorithms and modern physically meaningful interpretations of key power engineering paradigms in order to match the dynamic and decentralised nature of the smart grid.Open Acces

Socio-economic profile and risk factors among pulmonary tuberculosis patients in Madurai, India: a cross sectional study

Background: This study has been carried out to assess the socio-economic profile and underlying risk factors of pulmonary tuberculosis (PTB) patients registered under RNTCP programme of India and to find the differences based on their residential place.Methods: The study design was cross sectional consisting of 167 PTB patients from three DOTS centres in Madurai, Tamilnadu during August 2015. Data was collected using a questionnaire that included personal details, socio-economic and risk factors.Results: PTB was most prevalent in the age group of 35–54 years both in the urban (46.7%) and rural (49.4%) side. In the urban population, 67 (74.4%) were men whereas in the rural population they were 53 (68.8%). Maximum of the study subjects were from nuclear family (67.8% in urban and 89.6% in rural). About 20% of the patients studied were illiterates irrespective of their residential place. Labourers were 37% in urban area and 49% in rural area. Smoking, alcoholism and Diabetes Mellitus (DM) were more common among urban PTB patients while under-nutrition and poor housing among rural PTB patients.Conclusions: The study has concluded that the usual epidemiological pattern of PTB has been observed in both urban and rural setup as reported by other researchers. Socio-economic status and risk factors have played a vital role for treatment success. To eradicate Tuberculosis (TB), a holistic and interdisciplinary approach would be necessary to improve the socio-economic status along with proper screening and treatment of underlying risk factors. More precise health education and proper awareness programmes have to be implemented from the grass-root level to get rid of TB.

Bibliography of Contributions from Central Marine Fisheries Research Institute

The Central Marine Fisheries Research Institute in the course of over two decades since its inception in 1947, has published the work done by a large number of scientific staff at the headquarters station and the outstation establishments in varied periodicals, memoirs, proceedings of the occasional symposia conducted by the world organisations etc., the total number of publications amounting to about a thousands, covering a wide range of topics in the fields of fishery biology, marine biology, physiology and other related disciplines. The need for an up to date list of publications for ready reference has been keenly felt by the scientific workers of this Institute and other organisations. This bulletin has been prepared by Shri K. Kanakasabapathi of the Institute in addition to his normal official duties. I place on record my appreciation of him for carefully compiling and indexing the list with meticulous care

Catalogue of Serials and Expedition Reports in the Library of the Central Marine Fisheries Research Institute

The present Bulletin is the second in the series issued by the Central Marine Fisheries Research Institute and lists the Serials and Expedition Reports available in the library. In addition to the Publications catalogued, the library has over 3000 books and a very large number of reprints. The Institute’s library is one of the best on fisheries and marine sciences in the Indian Ocean Region and it is hoped that a catalogue of this kind will be useful to those interested in getting an idea of its holdings. Quite a large number of the serials are incomplete at present but it is proposed as far as possible to complete, during the ensuing five-year plan period, those which are of direct interest to the work of the Institute