The Effect of Raw Materials Molar Ratio in Mechanochemical Synthesis of Amorphous Fe-B Alloy Nanoparticles

In this study, amorphous iron-boron alloy nanoparticles successfully synthesized by mechanochemical method. The raw materials were ferrous sulfate heptahydrate (FeSO4.7H2O) as a source of iron and sodium borohydride (NaBH4) as a reducing agent. Powders grinding was performed with different NaBH4/FeSO4.7H2O molar ratio. The results revealed that high active and completely amorphous particles could be synthesized with the molar ratio of 4:1 for NaBH4:FeSO4 in 10 minutes of grinding time. Various characterizations, such as the chemical analysis, atomic absorption spectroscopy (AAS), fourier transform infrared spectroscopy (FT-IR), x-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) have been performed. The XRD results confirmed the formation of the amorphous phase. Other results also indicate the formation of amorphous alloy nanoparticles with an average particle size below 50 nm and the composition was Fe-10 Wt percent B. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3489

Hydrologic Assessment in Uri River Basin, using SWAT Model

River basin is considered to be perfect unit for management of the natural resources. Utilizing Remote Sensing and Geographical Information System (GIS) technique with mathematical models to assess the hydrologic parameters for the basin is being practiced widely now a day. In this work SWAT (Soil and Water Assessment Tool) having an interface with Arc MAP GIS software was used for the estimation of runoff yield of Uri river basin tributary of Narmada basin. The developed model was calibrated from the year 1999 to 2006 and validated for the period of 2008 to 2014. The coefficient of determination (R2) and Nash-Sutcliffe simulation efficiency (ENS) for the monthly runoff was obtained as 0.71 and 0.70 respectively for the calibration period and 0.70 and 0.69 respectively for the validation period

Temperature - dependent life table of the predatory mite, Amblyseius swirskii (Mesostigmata: Phytoseidae) fed on stored product mite Carpoglyphus lactis (Astigmata: Carpoglyphidae)

The predatory mite, Amblyseius swirskii (Athias-Henriot) is an efficient predator of some insect pests particularly thrips and whiteflies. To evaluate the optimum temperature for  A.swirskii, a life table study, based on the age-stage, two-sex life table theory, was conducted using the stored product mite, Carpoglyphus lactis L. as the food diet. Experiments were performed at temperatures of 22, 25, 30 and 32° C, %70 ± 5 relative humidity and 16: 8 (L: D) photoperiod. Developmental time of eggs at 30° C was significantly shorter comparing to the temperatures 22 and 32° C. Developmental time of the mobile pre-adult stages, male and female, were significantly shorter at 32° C, comparing to 25° C. The highest fecundity of the predator was observed at 25° C (72.34 eggs / female). The intrinsic rate of increase (r), finite rate of population increase (λ), net reproductive rate (R0), at temperature of 22° C were 0/226 day-1, 1/25 day-1, 25/53 offspring/individual; at 25° C were 0/304 day-1, 1.35 day-1, 33/82 offspring/ individual; at 30° C were 0/097 day-1, 1/102 day-1, 2/42 offspring/ individual; at a temperature of 32° C were 0/128 day-1, 1/137 day-1, 2/67 offspring/ individual. The population parameters of A. swirskii, except mean generation times (T), at 25° C and 32° C were significantly higher than those at 30° C, and the average generation time (T), at temperature of 22° C, was found to be the highest. The total population projection demonstrated that the highest population growth of predatory mite, A. swirskii occurred at 25° C

Diásporas de encantados na Amazônia Bragantina

Partindo de exercícios etnográficos, o texto apresenta experiências diaspóricas de mulheres rezadeiras que, ao migrarem do Nordeste brasileiro para a “Amazônia Bragantina”, no Estado do Pará, a partir da década de 1950, tiveram suas vidas marcadas pelo processo de iniciação junto a entidades da encantaria brasileira (Prandi, 2004). Em viagens noturnas a cemitérios, transfigurações, transportes físicos, vidências e andanças em corpos de animais, ventos e águas, essas rezadeiras revisitaram “mundos” e “tempos” imemoriais, passando a dialogar com pajés e “poderosos” rezadores do Maranhão, Paraíba, Piauí e Ceará, deixando ver pessoas e encantados em outros sentidos de deslocamento. A crença na capacidade das entidades de acompanhar as pessoas detentoras do “dom de rezar” até o Pará, bem como de transitarem continuamente nesses locais, nomadizando-se (Deleuze; Guattari, 1995) entre o “lá” e o “aqui”, constitui o fenômeno da “diáspora dos encantados” (Brah, 2011; Hall, 1999, 2009). A convivência com essas mulheres ensina, entre outros aspectos, a defender concepções de encontros e deslocamentos de culturas que percebam a alteridade radical da cosmologia das ciências humanas, mesmo quando esta se crê fielmente situada em lugares de partida, movimentos de passagem ou chegada, esquecendo, muitas vezes, que se trata não de lugar, mas de trânsitos materiais e simbólicos.Starting from ethnographic exercises, the text presents diasporic experiences of women mourners that when migrating from northeastern Brazil to “Amazon Bragantina”, in Pará State, from the 1950s, whose lives were marked by the initiation process with the entities of the Brazilian enchant (Prandi, 2004). On overnight trips to cemeteries, transfiguration, physical transport, clairvoyance and wanderings in animal bodies, winds and waters, these mourners revisited “worlds” and ancient “times”, going to talk with shamans and “powerful” chanters of Maranhão, Paraíba, Piauí and Ceará, letting people see and delighted in other senses of displacement. The belief in the ability of entities to monitor persons holding the “gift of praying” to the Pará, as well as continually transitioning these sites, nomadizando up (Deleuze; Guattari, 1995) between “there” and “here”, constitute the phenomenon of “diaspora of the enchanted” (Brah, 2011; Hall, 1999, 2009). Living with these women teaches, among other things, to defend conceptions of meetings and displacements of cultures that perceive the radical otherness of the cosmology of the human sciences, even when one believes this faithfully situated in places of departure, passage and arrival of movements, forgetting often it is not the place, but the material and symbolic transits

Effect of Steel Fiber on The Behavior of Deep Beams With and Without Web Opening

This study investigates experimentally the strengthening of reinforced concrete deep beams using steel fibers. The experimental work could be divided in two parts, the first part consists of casting and testing six deep beams without web opening and the second part consists of casting and testing six deep beams with web openings to show the effect of volume of steel fibers on the behavior of the deep beams with and without web opening on ultimate load, deflection, with various shear span to depth (a/d) ratios [variable of clear shear span].On the other hand, the effects of these parameters on the behavior and capability of deep beams with constant steel fiber – volume fraction are obtained by using three groups of beams having steel fiber– volume fractions of 0.0%, 0.5%, 1.0% and studying the effect of the presence of steel fibers in deep beams with web openings. The results obtained from the experimental work [solid deep beams and deep beams with web openings], demonstrate that when the steel fiber volume- fraction is increased, the ultimate loads are also increased. The effect of steel fibers increases as the (a/d) ratio is decreased. In addition, the experimental work on deep beams without web opening showed that when the steel fiber volume-fraction is kept constant, the ultimate loads are increased as the (a/d) ratio is decreased. On the other hand, the percentages of increase in ultimate loads become higher as the steel fiber volumefraction is increased from 0.0% to 0.5% and 1.0%. However, the effect of decreasing the (a/d) ratio on the ultimate and cracking loads of the deep beams with web openings was not significant

A novel approach to computer-aided diagnosis of mammographic images

This is a work-in-progress report of a research endeavor that deals with the design and development of a novel approach to computer-aided diagnosis (CAD) of mammographic images. With the initial emphasis being on the analysis of microcalcifications, the proposed approach defines a synergistic paradigm that utilizes new methodologies together with previously developed techniques. The new paradigm is intended to promote a higher degree of accuracy in CAD of mammograms with an increased overall throughput. The process of accomplishing these goals is initiated by the fractal encoding of the input image, which gives rise to the generation of focus-of-attention regions (FARs), that is, regions that contain anomalies. The primary thrust of this work is to demonstrate that by considering FARs, rather than the entire input image, the performances of the ensuing processes (i.e., segmentation, feature extraction, and classification) are enhanced in terms of accuracy and speed. After presenting the proposed approach to CAD of mammographic images, the paper describes the generation of FARs. Furthermore, an experimental study is included that demonstrates the impact of this front-end procedure on the process of microcalcification segmentation. Specifically, the experimentation reveals a dramatic decrease (increase) in the amount of input data (throughput), as well as a reduction in the number of false detections