Archives-December  

The structural and tectonic analysis of Okposi and environs, Lower Benue Trough using Landsat-TM data was carried out with the aim of carrying out a detailed structural interpretation of the study area by identifying the lineaments associated with the study area and inferring their effect on the economic potentials of the study area. In addition, this study was aimed at determining whether the Okposi Brine Lake in the study area is structurally controlled. Several GIS softwares which include the ILWIS 3.1 Academic were used to analyze the data. Simple digital image processing techniques were applied on the data to enhance edges of linear features, followed by computer aided visual interpretation. Results revealed that high lineament frequencies/density were obtained in areas where basement rocks outcrop or are closer to the surface whereas low lineament frequencies are characteristics of areas with deeply buried basement rocks. Similarly, the absence of visible lineaments in parts of the area may not be indicative of complete absence of geological structures. Trend analysis of the lineaments computed by plotting the strikes and lengths of all the lineaments revealed on the image on a rose diagram revealed structural trends in the E-W, N-S, NW-SE and NE-SW directions with the NW-SE and NE-SW directions as the dominant trends. The NE-SW linear structures observed from the study are believed to be the continental extension of the known pre-Cretaceous trans-Oceanic Fracture Zones viz. Charcot and Chain Fracture Zones. The numerous lineaments in the study area make the region viable for mineral prospecting. Finally, the presence of a lineament zone around Okposi area may be responsible for the formation of the Okposi Brine Lake. It is believed that this linear feature must have cut through the basinal brine of the Asu River group of the Benue Trough.

The spin coating method was used for the preparation of ZnS, Mn doped ZnS (MZS) and Cobalt doped ZnS (CZS) thin films and their structural and optical properties were studied. The ZnS thin films were grown on well cleaned glass substrates by spin coating method from aqueous solution of Zinc Sulphide and Thiourea with two different dopants Mn and Co. The properties of ZnS, MZS and CZS thin films and their growth mechanisms were studied using x-ray diffraction, UV-Visible spectroscopy, photoluminescence and VSM studies. Effect of dopants on structural, optical and magnetic properties was reported. Keywords: ZnS, Spin Coating, Dopants, Structural, Optical and magnetic properties.

Bio-metric identification systems are widely used for unique identification of humans mainly is verification and identification .It is used as a form of identity access management and access control. Fingerprint identification is one of the best biometric technique. The biometric fingerprints identification are secure to use and mainly unique for every person and do not change in one’s lifetime. This paper is to identify each and every student of the department as well as the college.

In this work Cadmium Sulphide/Porous Silicon (CdS/PS) nanocomposite structure was successfully synthesized by depositing CdS film over PS substrate at room temperature. CdS was incorporated into the pores of PS and thereby making a protecting layer. The XRD, SEM, FTIR and PL analysis were carried out to characterize the CdS/PS structure. XRD result suggests the formation of CdS hexagonal structure on PS surface. The diffraction peaks pertaining to PS along with those corresponding to CdS were observed. The surface morphology of the prepared CdS/PS layer was studied by SEM analysis. The information about the vibration and rotation of molecular groups and the bonding of inorganic molecules on silicon surfaces are confirmed by transmission FTIR spectra. The PL measurements on CdS/PS structure show emission peaks at around 620 & 660 nm with 2.0 & 1.9 eV band gap respectively. These results show the incorporation of CdS into the pores of PS and capable of utilizing for device applications. Keywords: CdS/PS, XRD, SEM, FTIR, PL

The term “producer” rather than “farmer” because it covers all aspects of agricultural production, including livestock and fisheries, and the processing of agricultural products on-farm or in the rural areas (such as the women’s cottage industries). The producer organizations (POs) considered are formal rural organizations whose members organized themselves with the objective of improving farm income through improved production, marketing, and local processing activities. POs deal with: policies on issues such as pricing and export and import of agricultural products; improvement of agricultural production practices; access to inputs and services, including agricultural credit; marketing of agricultural production; and local processing of agricultural production and its marketing. Collectivization of producers, especially small and marginal farmers, into producer organizations has emerged as one of the most effective pathways to address the many challenges of agriculture but most importantly, improved access to investments, technology and inputs and markets. Department of Agriculture and Cooperation, Ministry of Agriculture, Govt. of India has identified farmer producer organization registered under the special provisions of the Companies Act, 1956 as the most appropriate institutional form around which to mobilize farmers and build their capacity to collectively leverage their production and marketing strength. It has been argued that rural producer organizations (RPOs) are an effective tool for solving problems in rural areas and promoting agricultural development. The empirical evidence of the effectiveness of POs on serving their members is scarce at best.

We have studied the relationship between suicide in Slovakia and various Solar, Interplanetary and Geomagnetic Activity parameters, such as Sunspot Numbers (SSN), Solar Flare Index (SFI), Sudden Storm Commencements (SSC), and planetary Ap, Kp and Dst Indices observed during the period of 1986 to 2010. The data shows that the number of deaths due to suicide of males and females is well correlated with the yearly mean of Sunspot Numbers (SSN), Solar Flare Index (SFI), Sudden Storm Commencements (SSC), and planetary Ap, Kp and Dst Indices. We have calculated a large positive correlation, with correlation coefficients of 0.72, 0.64, and 0.62, between the yearly total number of male deaths due to suicide and the Planetary Kp, Ap, and Dst (magnitude) Indices. In addition, we have found a large negative correlation, with correlation coefficients -0.77, -0.68, and -0.60, between the yearly total number of female deaths due to suicide and the Planetary Kp, Ap, and Dst (magnitude) Indices. A large positive correlation, with a correlation coefficient of 0.60, and a good medium positive correlation, with correlation coefficient 0.57, has been found between the yearly total number of male deaths due to suicide and the yearly mean of the SSN and SFI. A good medium negative correlation, with correlation coefficients -0.49 and -0.40, has been found between the yearly total number of female deaths due to suicide and the SSN, SFI. From the statistical analysis of sudden storm commencements (SSC), and death due to suicide, we have obtained a positive correlation, with correlation coefficient of 0.51, between the yearly total number of male deaths due to suicide and Sudden Storm Commencements (SSC), as well as a negative correlation, with a correlation coefficient of -0.38, between the yearly total number of female deaths due to suicide and Sudden Storm Commencements (SSC).

The title organic–inorganic hybrid material, (C5N2ClH6)2[CdCl3.57(H2O)0.43].Cl0.43.H2O1.57, crystallizes in the non-centrosymmetric setting in the chiral space group P212121. Its simplified structure consists of edge sharing [CdCl4]2- units that are connected with each other to form infinite {[CdCl2Cl4/2]2-}n anionic chains; of 2-amino-5-chloropyridinium cations (two for every cadmium ion); and of one localized water molecule. Areas with additional electron density, adding up to 12 electrons each, are found in the form of narrow tubes that stretch along the direction of the a-axis, but no meaningful model for these regions could be devised and the electron density in there was instead corrected for by back-Fourier transformation methods. In the solid state structure one of the chlorine atoms of the tetrachlorocadmate units is partially replaced by a water molecule in a 0.568 (7) to 0.432 (7) ratio, with charge balance achieved through partial replacement of an interstitial water molecule by a chlorine ion. This leads to an actual formula for the compound of (C5N2ClH6)2[CdCl3.57(H2O)0.43].Cl0.43.H2O1.57 rather than the simplified (C5N2ClH6)2[CdCl4].2H2O. In the more prevalent cadmate units the metal centers have a distorted octahedral CdCl6 coordination sphere. In the remainder of the sites with one of the chlorines replaced by water, the coordination geometry is CdCl5(OH2) instead. The anionic and cationic units and the water molecules are connected through intricate O—H•••Cl, N—H•••Cl and N—H•••O hydrogen bonding interactions, with three of these being three-center interactions. The exocyclic N atom is an electron receiving center, which is consistent with features of imino resonance evidenced by bond lengths and angles. Results from solid state 13C and 15N CP–MAS NMR spectroscopy are in good agreement with the X-ray structure. Density functional theory calculations allowed for the assignment of the carbon peaks to the independent crystallographic sites.

Some N-(substituted)-5,6-dimethylthieno[2,3-d]pyrimidin-4-amine derivatives 3(a-e) and 3-(substitutedphenyl)-1-(4-(5,6-dimethyl thieno [2,3-d]pyrimidin-4-ylamino)phenyl)prop-2-en-1-one derivatives 5(a-e) were synthesized starting from 2-amino thiophene-3-carboxylic acid ester analogue. The structures of all synthesized compounds have been evaluated by physical methods (melting point as well as elemental analyses) and also were confirmed by IR, 1H and 13C NMR spectroscopies. All the newly synthesized compounds were tested for their in vitro antimicrobial activity against gram (+)ve and gram (-)ve bacteria and also on different strains of fungi. Some of the compounds showed better antibacterial as well as antifungal activities in comparison with the standard drugs.

A series containing fourteen substituted styryl 5-methyl-2-furyl ketones [2E- 1(5-methyl-2-furyl)-3-(substituted phenyl)-2-propen-1-ones] were synthesized by Crossed-Aldol condensation between2-acetyl-5-methylfuron and various substituted benzaldehydes. The synthesized ketones were characterized by their physical constants and spectral data. The group frequencies of infrared absorption (cm-1) of ?COs-cis and s-trans, ?CHout of plane and in-plane, ?CH=CH out of plane, ?>C=C

Worldwide national policies on higher education are giving increasing importance to improve the quality of education on offer. Consequently, the evaluation of teachers’ performance is especially relevant for the academic institutions as it helps to define efficient plans to guarantee quality of teachers and the teaching learning process. However, a key challenge is to understand the complex range of features associated with teacher evaluation, the contentiuos issues on accuracy and reliability of classical evaluation methods coupled with both mixed empirical evidence about their effects on students’ learning and conflicts of interest between key actors of education systems. This paper is an overview of evaluation of teachers’ performance in higher institutions, challenges in the progress, the main research areas and its applications to develop an effective and improved teachers’ performance evaluation system.