1,701 research outputs found
Fixed Point Result with Compact Metric Space
The goal of this research is to study some fixed point results in compact metric space. We have proved some fixed point theorem for self-mapping satisfying a new contractive condition involving rational expressions in compact metric space
Occurrence of pteropods in a deep eastern Arabian Sea core: Neotectonic implications
This paper reports pteropod shells (aragonitic) at 100, 200, 270-277 and 470 cm sediment depths in a core (EAST) recovered from 3820 m deep water from the eastern Arabian Sea. Ages of the four stratigraphic levels showing pteropod presence are estimated as 29, 52, 70-72 and 127 kyr. In normal circumstances microfaunal assemblages of this core are expected to be devoid of pteropod shells because the site is situated far below (∼ 3.5 km) the Aragonite Compensation Depth. Therefore, the recorded pteropod shells are exotic to the location and may have been transported from the shallower depths by the turbidity currents. The plausible reason for the preservation of aragonitic shells at such greater depth appears to be quick burial of pteropods resulting from large-scale vigorous slumping triggered by neotectonic activity
Improvement of Synergetic Effect In Heterogeneous Catalysis By Addition Of Metal Oxides
Over the past few years, synergetic effect has great importance in the heterogeneous catalysis structure. Synergetic effect provides the importance of the activity and stability of catalysis to produce desired product by improving the defects in the solid heterogeneous catalysis. These defects occur due to imperfection of the solid crystal lattices. And these defects can be improved by the addition of various metal oxides, which finally improve the synergetic effect or the defects in the heterogeneous catalysis. The metal oxide additives were found to influence the catalytic activity in the reaction, surface composition of the catalyst and the stability of catalysts during their operation. This paper reviews and assesses the effectiveness of different metal oxides additives in the heterogeneous catalysis activity and stability i.e. by improving synergetic effect in the heterogeneous catalysis. Keywords: synergy effect, encapsulation, mimic enzyme, BET, coprecipitation, calcination.
Application of Appopolite in Adsorption of Heavy Metals (Co and Ni) from Waste Water
The optimum conditions for adsorption/ion exchange by using a batch method were evaluated by changing various parameters such as adsorbent amount, initial pH of the solution, mixing temperature and initial metal ions. The influence of the temperature on the ion-exchange/adsorption process was also examined. The Langmuir and Freundlich adsorption isotherm equations were derived from the basic empirical equations, and used for calculation of ion exchange parameters. Adsorption isotherms of Co2+ & Ni2+ ions could be best modelled by the Langmuir equation. The influences of contact time, metal initial concentration, adsorbent dosage concentration, and temperature have been studied. The adsorption efficiencies are found to be contact time dependent, increasing the contact time in the range of 20 180 min. The sorption equilibrium has attained between 60 and 180 min. Keywords - Adsorption, Freundlich adsorption isotherm, ion exchange, Langmuir equation, sorption equilibriu
Fixed Point Result in Menger Space with EA Property
This paper’s main objective is to define Menger space (PQM) and the concept of weakly compatible by using the notion of property (EA) & JSR maps to define new property to prove a common fixed point theorem for 4 self maps in Menger space (PQM). Key Words: Fixed Point, Probabilistic Metric Space, Menger space, JSR mappings, property EA Subject classification: 47H10, 54H2
Structural and Optical Studies of 100 MeV Ni+7 Irradiated Cadmium Selenide Thin Films
The effect of irradiation with Swift (100 MeV) Ni+ 7 ions on the structural and optical properties of
Cadmium Selenide (CdSe) thin films have been investigated at different fluencies in the range of 1 1011-
1 1013 ions/cm – 2. The CdSe films on glass substrates were prepared by thermal evaporation. The structural
and optical changes with respect to increasing fluence were observed by the means of X-ray diffraction
(XRD), UV-VIS and Raman spectroscopy. After irradiating the films with Ni+ 7 ions XRD show the increased
in peak intensity and crystallite size with increasing fluence. The UV-VIS-IR spectroscopy revealed
that there is decrease in band gap energy of the films after irradiation with increasing fluencies.
Raman spectrum for as deposited and irradiated films show two peak, one at 209 cm – 1 and at 410 cm – 1
which is assigned to the longitudinal optical (LO) phonon mode
Structural and Optical Studies of 100 MeV Ni+7 Irradiated Cadmium Selenide Thin Films
The effect of irradiation with Swift (100 MeV) Ni+ 7 ions on the structural and optical properties of
Cadmium Selenide (CdSe) thin films have been investigated at different fluencies in the range of 1 1011-
1 1013 ions/cm – 2. The CdSe films on glass substrates were prepared by thermal evaporation. The structural
and optical changes with respect to increasing fluence were observed by the means of X-ray diffraction
(XRD), UV-VIS and Raman spectroscopy. After irradiating the films with Ni+ 7 ions XRD show the increased
in peak intensity and crystallite size with increasing fluence. The UV-VIS-IR spectroscopy revealed
that there is decrease in band gap energy of the films after irradiation with increasing fluencies.
Raman spectrum for as deposited and irradiated films show two peak, one at 209 cm – 1 and at 410 cm – 1
which is assigned to the longitudinal optical (LO) phonon mode
Structure and Surface Analysis of SHI Irradiated Thin Films of Cadmium Telluride
Cadmium Telluride (CdTe) thin films grown by thermal evaporation on quartz substrates were irradiated with swift (100 MeV) Ni + 4 ions at various fluences in the range 1011 – 1013 cm – 2. The modification in structure and surface morphology has been analyzed as a function of fluence using XRD and AFM techniques. The XRD showed a reduction in peak intensity and grain size with increasing fluence. The AFM micrographs of irradiated thin films show small spherical nanostructures. In addition to direct imaging, AFM profile data enable to derive the Power Spectral Density (PSD) of the surface roughness. In the present work PSD spectra computed from AFM data were used for studying the surface morphology of films. The PSD curves were fitted with an appropriate analytic function and characteristic parameters were deduced and discussed in order to compare film morphology with varying fluence levels.
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Community-Based Health Insurance Schemes
Due to the limited ability of publicly financed health systems in developing countries to provide adequate access to health care, community-based health financing has been proposed as a viable option. This has led to the implementation of a number of Community- Based Health Insurance (CBHI) schemes, in several developing countries. To assess the ability of such schemes in meeting their stated objectives, this study systematically reviews the existing empirical evidence on three outcomes – access to schemes, effect on health care utilization and effect on financial protection. In addition to collating and summarizing the evidence we analyse the link between key scheme design characteristics and their effect on outcomes and comment on the role that may be played by study characteristics in influencing outcomes. The review shows that the ultra-poor are often excluded and at the same time there is evidence of adverse selection. The bulk of the studies find that access to CBHI is associated with increased health care utilization, especially with regard
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