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  • Author or Editor: P. Gupta x
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Abstract  

This paper examines the following basic issues of leadership in research units: (1) characteristics of the leader and the functions performed by him that predict the image of his quality; and (2) the role of leadership in enhancing the performance of the research unit. Analysis is based on data collected on 1460 research units in six countries for the second round of International Comparative Study on Organization and Performance of Research Units. Variations in the characteristics and role of leadership in different institutional settings and countries are analyzed through POSCOR (ranking programme based on partially ordered sets). Stepwise multiple regression analysis was used to examine the common pattern of relationship of various indices of leadership with the image of leader's quality and three measures of effectiveness — scientific, user-oriented and administrative. Analysis was repeated for each country to explore the stability in the pattern of relationships and to identify universal indices that have consistent relationships across countries. Implications of the results are discussed.

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Abstract  

In 1980, H. Izumi [3] introduced the concept of an h-vector. For the Finsler space whose metric is transformed by an h-vector, B. N. Prasad [10] obtained the Cartan connection. On the other hand, M. Matsumoto [7] presented a systematic theory of Finslerian hypersurface. M. Kitayama [4] obtained certain results for the Finslerian hypersurface given by β-changes. The purpose of the present paper is to derive certain properties of a Finslerian hypersurface given by an h-vector. The terminologies and notations are referred to Matsumoto [8].

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Abstract  

Certain geometrical properties of the hypersurfaces of two conformally and h-conformally related Finsler spaces have been discussed. The terminologies and notations are referred to Matsumoto [6].

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Abstract  

Uranium and thorium mixed oxides are being prepared using natural U and Th for studies on fuels for Advanced Heavy Water Reactors, wherein composition of U and Th is specific and requires strict control in terms their contents and homogeneity. Chemical quality control necessitates accurate and precise compositional characterization of the fuel material by a suitable analytical method. Among various analytical methods for U and Th, instrumental neutron activation analysis (INAA) is one of the best methods for their simultaneous determination without chemical dissolution and separation. INAA methods using reactor neutrons namely thermal NAA and epithermal NAA were standardized for the determination of U and Th in their mixed oxides. Standards, synthetic samples and U–Th mixed oxide samples, prepared in cellulose matrix, were irradiated at pneumatic carrier facility of Dhruva reactor as well as at self serve facility of CIRUS reactor under cadmium cover (0.5 mm). Radioactive assay was carried out using a 40% relative efficiency HPGe detector. Both activation and daughter products of 238U (239U and 239Np) and 232Th (233Th and 233Pa) were used for their concentration determination. The method was validated by analyzing synthetic samples of 6–48%U–Th mixed oxides. The standardized method was used for the concentration determination of U and Th in 4–30%U–Th mixed oxide samples. Results of U and Th concentrations including associated uncertainties obtained from the INAA methods are presented in this paper.

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Abstract  

The extraction behavior of uranium, thorium and lanthanides, represented by cerium and ytterbium, by Cyanex-923 has been investigated. The effect of different variables like the concentration of acids, metal ion and extractant, nature of diluent and temperature has been studied. A composition for the extracted U(VI) and Th(IV) species has been proposed. Based on the partition data some important binary and ternary separations involving the aforesaid metal ions have been achieved. The proposed procedure has been applied for the recovery of uranium, thorium and lanthanide fraction from monazite sand. The stability and regeneration capacity of the extractant have been evaluated.

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