Nucleation Phenomenon in Oscillatory Reactions

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Modelling the dynamics of turbulent floods

Consider the dynamics of turbulent flow in rivers, estuaries and floods. Based on the widely used k-epsilon model for turbulence, we use the techniques of centre manifold theory to derive dynamical models for the evolution of the water depth and of vertically averaged flow velocity and turbulent parameters. This new model for the shallow water dynamics of turbulent flow: resolves the vertical structure of the flow and the turbulence; includes interaction between turbulence and long waves; and gives a rational alternative to classical models for turbulent environmental flows

Simulated Model Studies on the Beneficiation of Calcareous Phosphate Ore

The main sources of rock phosphate are located in Rajasthan, Mussoorie (U.P.), Singhbhum (Bihar), Purulia (W.B.) etc. Phosphate rocks generally occur as calcitic, siliceous and ferruginous in nature. Rajasthan and Muss-oorie rocks are calcareous (CaO 40-50%). Hence to enrich the phosphate in the rock from average 16-20% to above 30% P205 two possible alternatives to beneficiate this ore

Extrahepatic undifferentiated embryonal sarcoma, cytology as an accurate method for early diagnosis: an extremely rare case report in an Indian child

Undifferentiated embryonal sarcoma has been described in the liver, a rare malignant mesenchymal neoplasm, that occurs primarily in children and teenagers. Approximately 260 cases have been reported arising in the liver since 1978 when this disease was first described. Its pathogenesis is still obscure. Authors presented a case of extrahepatic undifferentiated embryonal sarcoma in a 9-year-old female presenting with upper abdominal dull pain. Ultrasound and CT Scan showed normal liver architecture, with liver pushed upwards due to compression by tumor arising in the retroperitoneum. To the best of our knowledge, this is first case of extrahepatic undifferentiated embryonal sarcoma diagnosed on cytomorphology and confirmed by histopathology and immunohistochemistry markers

TSUNAMIGENIC SOURCES IN THE INDIAN OCEAN

Based on an assessment of the repeat periods of great earthquakes from past seismicity, convergence rates and paleoseismological results, possible future source zones of tsunami generating earthquakes in the Indian Ocean (possible seismic gap areas) are identified along subduction zones and zones of compression. Central Sumatra, Java, Makran coast, Indus Delta, Kutch-Saurashtra, Bangladesh and southern Myanmar are identified as possible source zones of earthquakes in near future which might cause tsunamis in the Indian Ocean, and in particular, that could affect India. The Sunda Arc (covering Sumatra and Java) subduction zone, situated on the eastern side of the Indian Ocean, is one of the most active plate margins in the world that generates frequent great earthquakes, volcanic eruptions and tsunamis. The Andaman- Nicobar group of islands is also a seismically active zone that generates frequent earthquakes. However, northern Sumatra and Andaman-Nicobar regions are assessed to be probably free from great earthquakes (M!8.0) for a few decades due to occurrence of 2004 Mw 9.3 and 2005 Mw 8.7 earthquakes. The Krakatau volcanic eruptions have caused large tsunamis in the past. This volcano and a few others situated on the ocean bed can cause large tsunamis in the future. List of past tsunamis generated due to earthquakes/volcanic eruptions that affected the Indian region and vicinity in the Indian Ocean are also presented

Birefringence analysis of multilayer leaky cladding optical fibre

We analyse a multilayer leaky cladding (MLC) fibre using the finite element method and study the effect of the MLC on the bending loss and birefringence of two types of structures: (i) a circular core large-mode-area structure and (ii) an elliptical-small-core structure. In a large-mode-area structure, we verify that the multilayer leaky cladding strongly discriminates against higher order modes to achieve single-mode operation, the fibre shows negligible birefringence, and the bending loss of the fibre is low for bending radii larger than 10 cm. In the elliptical-small-core structure we show that the MLC reduces the birefringence of the fibre. This prevents the structure from becoming birefringent in case of any departures from circular geometry. The study should be useful in the designs of MLC fibres for various applications including high power amplifiers, gain flattening of fibre amplifiers and dispersion compensation.Comment: 18 page

Benefits of core strengthening exercise in osteoarthritis knee patients: a narrative review

Osteoarthritis is a degenerative joint disease results from breakdown of cartilage that covers the ends of bones in joint. Breakdown causes bones to rub each other leading to pain, stiffness, swelling, loss of function in joint and can be accompanied by synovitis with or without joint fluid effusion. Muscle atrophy may develop if patient was inactive and did not perform exercises, which will affect functionality and stability of joint including activities of daily life. The aim of the study was to evaluate current literature and provide comprehensive overview of benefits of core muscle strengthening exercise in managing OA. The objective of this study was to discuss effectiveness of core muscle strengthening exercise in reducing pain, improving physical function, and enhancing quality of life in individuals with osteoarthritis knee. A systematic search was conducted to identify all relevant studies related to core muscle strengthening, database such as Pubmed, Cochrane library, Scopus had been used. Studies demonstrating clinical importance of core strengthening in treatment of osteoarthritis knee are limited. By performing randomized controlled trials with a big sample size, new researchers should produce more unique findings

Substituted Thiobiurets as Corrosion Inhibitors for Mild Steel in L.ON Sulphuric Acid

Corrosion inhibition studies of mild steel in 1.ON sulphuric acid have been performed at 25°C using substituted thiobiurets as inhibitors. All the inhibit- ors were found to inhibit the process by getting adsorbed on the metal surface. A comparative account of inhibition efficiencies of different compounds has been given consi-dering their size and probable sites through which adsor-ption can take place. Among the studied thiobiurets methoxyphenyl derivative behaved as the best corrosion inhibitor followed by mefhylphenyl-, phenyl- and chlorophenyl-derivatives

Agro-morphological and quality characterization of indigenous and exotic aromatic rice (Oryza sativa L.) germplasm

For establishment of the distinctness among 64 aromatic rice germplasm, 35 agro-morphological and quality traits were used. Most of the studied traits showed wide variation among the germplasm. Purple colour of auricles and ligule was found in only one genotype, while light purple colour of auricles was recorded in four genotypes. White colour of stigma was recorded in 57 accessions, whereas purple stigma was observed in six accessions. Awns present in 31 accessions. The weight of 1000 grains, which is one of the most important yield attributing traits showed wide variation among accessions, and ranges from very low to very high weight. Grain: length and decorticated grain: length showed high variation and ranges from very short to long type, while grain: width and decorticated grain: width showed somewhat little variation among the genotypes. Extra long slender type grain shape was observed in 27 accessions. White type of decorticated grain colour was found in 55 genotypes, while light red and red colour was observed in only three genotypes. The present study concluded that all sixty four accessions were found to be distinct on the basis of thirty one agro-morphological and quality traits. Accessions having short stem length, very long panicle length, more number of panicle per plant, and extra long slender grain may be used as potential donor in hybridization programmes. This study will be useful for breeders, researchers and farmers toidentify and choose the restoration and conservation of beneficial genes for crop improvement