Papers

Iran

Kiruna-type iron deposits are variable concentrations of magnetite-fluoroapatite-actinolite found in volcano-plutonic terranes from Early Proterozoic to Pliocene. No Archean ones are known. The iron ore deposits of Bafq region in central Iran have long been known as Kiruna-type. The origin and tectonic setting of these deposits have been a matter of debate during the last century. In this study, geochemistry of host rocks of Chadormalu and Esfordy iron deposits in Bafq region are investigated to elucidate the spatial-temporal characteristics of iron metallogeny. Geochemical evidence supports a nonorogenic continental setting. The Bafq region metallogenic characteristics are very similar to those of the Neoprotrozoic- Cambrian boundary.

Tantalum(V) complexes [TaCl5(LH)] (where LH = 1- para substituted phenyl tetrazoline-5-thione) have been synthesised and characterised on the basis of elemental analyses, conductivity measurements, IR, UV-vis and ‘HMNR studies. The ligands behaves as neutral monodentate having bonding through thiocarbonyl sulphur of thioamide group.

We have studied the interplanetary shock arrivals for the ascending phases of solar cycle-23 and 24(1996-2000, and 2008-2012). Total IP shocks (sum of forward and reverse shocks) are plotted with forward and reverse shocks for these times of intervals, and analysis of IP shocks, we found that occurrence of total IP shocks and Forward IP shocks are greater in the ascending phase of cycle-23 than that for the ascending phase of solar cycle-24, but the occurrence of the Reverse IP
shocks are greater in ascending phase of solar cycle-24 than the ascending phase of cycle-23.

In today’s sensitive environment, there are so many biometric technologies including iris recognition are available for person authentication and are coming of age due to the need to address sensitive security concerns in the 21st century. But, the single biometrics technique is not adequate for person identity recognition due to both sufficiently accurate and user-acceptable for universal application. When capturing an iris image under unconstrained conditions and without user cooperation, the image quality can be highly degraded by poor focus, off-angle view, motion blur, specular reûection (SR), and other artifacts. The noisy iris images increase the intra-individual variations, thus markedly degrading recognition accuracy. To overcome these problems, there are various iris recognition algorithms for noisy iris images. This paper is organized as follows. Part 1 discusses introduction & the technology of iris recognition; Part 2 and Part 3 discusses the application areas; and advantages of iris recognition for personal authentication; Part 4 discusses the importance of noisy iris recognition

The nanocomposites of polypyrrole (PPy), single wall carbon nanotube (SWCNT) and polyvinyl alcohol (PVA) with different compositions were synthesized by the chemical oxidative polymerization and solution casting methods. The morphological and structural properties of the nanocomposites were investigated with the help of FTIR and SEM techniques. The Fourier transform infrared spectroscopy (FTIR) analysis showed that the addition of PPy/SWCNT nanocomposite into PVA created interaction within the composite structure. SEM images revealed that the incorporation of SWCNT significantly altered morphology of PPy and PVA. The PPy/SWCNT nanocomposites exhibit
an enhanced electrical conductivity 0.746 Scm-1 compared to 6.87 ×10-3 Scm-1 for pure PPy and 1.18 ×10-15 Scm-1 for neat PVA. However, the DCconductivity of PPy/SWCNT/PVA nanocomposite is found to drop a little giving a value of 2.44x10-4 S/cm-1. PVA has been selected as the matrix for PPy/SWCNT nanocomposite in order to give mechanical stability to the PPy/SWCNT nanocomposites. The tensile strength study suggests that the incorporation of PVA makes it possible to cast the mechanically stable conducting film of the PPy/SWCNT/PVA ternary composite.

The purpose of the present problem is to study the effect of Rotation on MHD flow of visco-elastic (Rivlin-Ericksen) fluid through porous medium with transpiration. The governing equations of motions are solved by a regular perturbation technique. The velocity of fluid, skin friction, temperature and concentration are discussed with the help of tables and graphs. The primary velocity of fluid increases with the increase in M (Hartman number), but it decreases with the increase in Gr (Grashof Number), K (Porosity parameter) and  (Rotation parameter). The secondary velocity increases with the increase in Gr, M and , but it decreases with the increase in K.

When a straight channel formed by two parallel plates, through which two immiscible liquids occupying different heights are flowing under constant pressure gradients is rotated about an axis perpendicular to the plates, secondary motion is set up. The motion is caused due to the combined effects of the pressure gradient and motion of the upper plate. The heat transfer characteristics are evaluated assuming equal and different plate temperatures. The solutions are exact. The heat
transfer coefficient at the upper and lower plate has been calculated and presented graphically.

This paper mainly dealt with the geochemistry, mineralogy and genesis of the bauxite deposits of Ratnagiri district of Maharashtra. The bauxite deposit occurring at an elevation of 320 m from the mean sea level in the Konkan tract with a step-wise fall in the altitude from east to west. Regolith occurs mainly over the Deccan basalts and forms characteristic weathering profiles with distinct petro-mineralogical features. A simple geochemical balance of lateritization processes governing the development of several tens of meters of weathering profiles overlain by duricrust is estimated on the basis of detailed mineralogical and geochemical data.

The weathering mantle at the study area is composed of different weathering layers described from the base to the top of vertical profiles. These profiles are visible into the saprolith, pedolith, and in variably a topmost lateritic duricrust. Based on the textural and mineralogical studies, the saprolith is further differentiated into sap rock and saprolite where
as pedolith is sub divided in to plasmic and mottled zones. The appearance of sap rock is not uniform throughout but it is observed in the Gothane-Vikhare profile where, as a well developed saprolite horizon is encountered at Hativale profile.

Primitive stage of alteration of primary minerals is observed well within the sap rock where as the profuse neo-mineralization is depicted by the saprolite zone. Pedolith part is characterized by the absence of relict minerals and it commences with an aluminous or ferruginous plasmic zone. Gibbsite is the main component of the bauxite zone with minor amount of goethite or limonite. The main component of the laterite zone is gibbsite with subordinate amount of goethite. Thelithological gradation from bed rock upwards to the duricrust is very well preserved in the surrounding area. Geochemical data of major oxides of the profile samples reveals that the rocks of the area are mainly composed of 81.23 to 99.44 % major oxides. The alumina content varies from 40.35 and 49.45% in bauxites and 25.72 to 33.84% in laterites where as it is very low in Deccan basalt which varies from 14.9 to 16.07%. Fe2O3 content varies in all the profiles which is highest at the lateritic zone (45.52-40.05-37.45%) and lower at the Deccan basalt (11.92-12.29-12.37%). The LOI is directly proportional to the alumina content and inversely proportional to the Fe2O3 content.

In this correlative analysis, we have taken daily value and yearly mean value of total interplanetary magnetic field B, Solar wind speed V, Geomagnetic Index, (Ap), Electro magnetic field V*B, Sunspot number (Rz) with equatorial disturbance storm time (Dst  -50 nT) index for the solar cycle 22 to ascending phase of recent solar cycle 24, (years 1986 – 3 June 2013), 577 geomagnetic storms are identified and a correlative study has been preformed. It has been found that the anti- correlation betweentotal interplanetary magnetic field B, Solar wind speed V, Geomagnetic Index (Ap), Electro magnetic field (V*B), with geomagnetic storms (Dst  -50 nT) index and Ap Index are also found to be positive correlated with B, Solar wind speed V, Electro magnetic field (EMF) V*B, which clearly indicate a good positive correlation r = 0.947 (Ap with V*B), r = 0.901 (Apwith B), and negative correlation coefficient between geomagnetic storms (Dst  -50 nT) with V*B, r = -0.947 and r = -0.947 (Dst-50 nT) with B. The study of solar, interplanetary and geomagnetic parameters make possible to know the disturbances and impact on space weather interaction in the interplanetary magnetic field. In the present papers, we have analyzed the effect of interplanetary parameters on geomagnetic-sphere.

The primary objectives of feed formulation is to provide the species under culture with an acceptable diet that meets its nutritional requirements at different stages of its life, so as to yield optimum production at minimum cost. Although rice bran and mustard oil cake are being used as fish supplementary feed, these materials are highly scarce and the cost is very high. Animal by-products constitute the most important ingredients of aqua culture feeds. The most suitable animal product for incorporation into fish diets is fish meal. The processed soybean (as a protein source) and aquatic macrophytes have been known to have potential food value. Squilla (as a another protein source) is valuable animal protein for fishes. In deficiency of natural feed, the supplementary feed is best option to increase economical value of fishes. In the present study indicates that incorporation of soybean ,fish meal and squilla meal at high dietary protein level in the traditional rice bran an oil cake diets, would perform well and further studies at higher level of incorporation may reveal the optimum dietary requirement levels of this protein source.