Alkoxide Complexes of Some Tri- & Tetra-valent Metals: Part I- Conductometric & Potentiometric Studies on Some Aluminium Alkoxide Complexes in Non-aqueous Solvents

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A study of knowledge beliefs and attitudes regarding aids and human sexuality among medical college, engineering college and university Undergraduates of gorakhpur.

Research Problem: i) What is the level of knowledge and altitude of undergraduates about AIDS and human sexuality? ii) What arc the preferred modes of obtaining such knowledge?. Objectives: To assess the knowledge, beliefs and attitudes of undergraduate students regarding AIDS and human sexuality. Study Design: Self administered questionnaire. Setting and Participants: 1289 undergraduates from B.R.D. Medical College., M. M. M. Engineering College and University of Gorakhpur. Study Variables: Knowledge, beliefs and attitudes regarding AIDS and sexuality. Outcome Variables: Proportion of students having correct knowledge and positive attitudes. Statistical Analysis: By proportions. Result: l.evcl of knowledge about AIDS was generally high. Most of the students obtained knowledge about it through mass media. Few students had misconceptions about transmission of 1IIV infection. Knowledge about sex was obtained mainly from friends (36%) and books (31.31%). Most of the students preferred doctors (44.15%) and friends (43.66%) for asking something about sex. and not their parents (4.37%) or teachers (4.61%). 59.13% of boys and 34.49% of girls thought that students of their age had sex. Conclusion and Recommendations: The most peculiar fact in (his study is that students have no reliable means of obtaining correct information about subjects related to sex. Medical profession contributed very little in providing such knowledge. Most of them relied on their friends for such information. So. emphasis is to be given on recommending proper education material for the youth

Bronchoalveolar lavage study in victims of toxic gas leak at Bhopal

Bronchoalveolar lavage using flexible fibreoptic bronchoscope was carried out in 50 patients 1-2½ yr after exposure to the ‘toxic gas’ at Bhopal. Thirty six patients in the analysis were categorised into 3 groups (viz., mild, moderate and severe), depending upon the severity of exposure. There was an increase in cellularity in the lower respiratory tract (alveolitis) of the severely exposed patients (in both smokers and non-smokers), compared to normals (P< 0.05). The increase in cellularity in severely exposed non-smokers was due to abnormal accumulation of macrophages (P<0.01), and in severely exposed smokers, to macrophages (P<0.01) and neutrophils (P<0.05). Mild and moderately exposed patients did not show significant change in cellularity in lower respiratory tract, compared to normal individuals (P>0.2). There was a trend towards increasing cellularity, as the severity increased (P < 0.0001) and higher numbers of total cells were seen in severely exposed smokers, suggesting that smoking is a risk factor. It appears, therefore, that subjects severely exposed to the toxic gas at Bhopal may have a subclinical alveolitis characterised by accumulation and possibly activation of macrophages in the lower respiratory tract. Smokers, who were exposed to the gas had in addition, accumulation of neutrophils

Characterization and its implication on beneficiation of low grade iron ore by gravity separation

Studies were undertaken on low grade iron ore sample from Noamundi iron ore mines. The objective of this study was to examine the possibility of the physical beneficiation of low grade iron ore sample by physical methods for the blast furnace route of iron production. The present investigation relies on petrography and ore mineralogical characterization, ore textures (primary, secondary, metamorphic), liberation characters and its impact on the mineral beneficiation methods to produce quality concentrate. The geological characters, alteration mineralogy, morphometric variation, ore microscopy (using model microscope with transmitted and reflected light) and thereby understanding the genesis has given proper insight into the occurrence of various minerals. In addition to this, representative samples were employed for detailed investigation by using XRD, SEM-EDS and cathodoluminescence (CL) studies for confirmation of major as well as minor ore minerals and associated gangue minerals. Investigations suggest that lateritic iron ore samples obtained from the study area are composed of hematite (two generations), goethite (two generations) and limonitic material (younger generation) in association with major gangue minerals such as clay minerals (kaolinite, illite), bauxitic minerals(gibbsite, boehmite and diaspore), cryptocrystalline silica(japer, chert) and crystalline quartz as well as apatite and collophane. Fair liberation obtained below 74 micron size. It was interesting to find that inspite of the complex mineralogy of iron ore, beneficiation results using gravity separation like multi gravity separator (MGS), particularly in finer size ranges was encouraging. The result of ore-gangue mineralogical studies were found quite useful in evaluating the separation efficacy of gravity separation process. The process mineralogical data corroborated well with beneficiation results

A Neural Network Simulator for the Connnection Machine

In this paper we describe the design, development, and performance of a neural network simulator for the Connection Machine (CM)3. The design of the simulator is based on the Rochester Connectionist Simulator(RCS). RCS is a simulator for connectionist networks developed at the University of Rochester. The CM simulator can be used as a stand-alone system or as a high-performance parallel back-end to RCS. In the latter case, once the network has been built by RCS, the high-performance parallel back-end system constructs an equivalent network on the CM processor array and executes it. The CM simulator facilitates the exploitation of the massive parallelism inherent in connectionist networks. It can also enable substantial reduction in the training times of connectionist networks

Low-Temperature Mobility of Surface Electrons and Ripplon-Phonon Interaction in Liquid Helium

The low-temperature dc mobility of the two-dimensional electron system localized above the surface of superfluid helium is determined by the slowest stage of the longitudinal momentum transfer to the bulk liquid, namely, by the interaction of surface and volume excitations of liquid helium, which rapidly decreases with temperature. Thus, the temperature dependence of the low-frequency mobility is \mu_{dc} = 8.4x10^{-11}n_e T^{-20/3} cm^4 K^{20/3}/(V s), where n_e is the surface electron density. The relation T^{20/3}E_\perp^{-3} << 2x10^{-7} between the pressing electric field (in kV/cm) and temperature (in K) and the value \omega < 10^8 T^5 K^{-5}s^{-1} of the driving-field frequency have been obtained, at which the above effect can be observed. In particular, E_\perp = 1 kV/cm corresponds to T < 70 mK and \omega/2\pi < 30 Hz.Comment: 4 pages, 1 figur