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Hossein A.,Islamic Azad University at Baft | Safdar A.,Islamic Azad University at Baft | Safdar A.,Young Researchers and Elite Club
Indian Journal of Animal Sciences

Bovine somatotropin (bST) was administered @ 50 and 100 mg at the beginning of the estrus synchronization and natural mating of the sheep to evaluate the improvement of the ovulation rate, embryonic development and pregnancy rate of the transferred embryos. Donors (48) were treated with 3 different types of treatment; group A (15): treated with bST-100, received 100 mg of bST at the beginning of the synchronization and natural mating, group B (15): treated with 50 mg of bST same as the previous group and control (18) did not receive any type of bST. Each recipient (108) received 2 embryos: 30 recipients received embryos from bST-100s, 45 received the embryos from bST-50 and 33 received embryos from the control group. Using SAS related GENMOD method, superovulatory response, embryo recovery, cleavage rate, transferable embryo percentage, quality of embryos, rates of pregnancy and embryonic development were analyzed. Using GLM procedure, numbers of corpus luteum and blastocyst cells were analyzed. The results showed that bST administration had no significant effect on superovulatory response, number of CL and recovered structures. Number of transferable embryos and embryos that had reached to the blastocyst in bST-50 was more than bST-100 and control group. In conclusion, treatment 50 mg bovine somatotropins enhance the ratio and growth of the transferable embryos. Embryos of bST-50 treatment indicated an improved embryonic development but bST did not affect the pregnancy rates of transferred embryos. © 2016, Indian Council of Agricultural Research. All rights reserved. Source

This article deals with free vibration analysis of thick nanocomposite laminated curved panels with finite length resting on two-parameter elastic foundations, based on the three-dimensional elasticity theory. The main objective of this research paper is to present a 3D elasticity solution for free vibration analysis of thick laminated curved panels with continuously graded carbon nanotube-reinforced (CGCNTR) sheets. The structure is supported by an elastic foundation with Winkler's (normal) and Pasternak's (shear) coefficients. The volume fractions of oriented, straight single-walled carbon nanotubes (SWCNTs) are assumed to be a three-parameter power-law distribution which is graded in the radial direction of the panels. An equivalent continuum model based on the Eshelby-Mori-Tanaka approach is employed to estimate the effective constitutive law of the elastic isotropic medium (matrix) with oriented, straight carbon nanotubes (CNTs). Because of using two-dimensional generalized differential quadrature method, the present approach makes possible vibration analysis of cylindrical panels with two opposite axial edges simply supported and arbitrary boundary conditions including Free, Simply supported and Clamped at the curved edges. The convergence of the method is demonstrated and comparisons are made between the present results and results reported by well-known references and have confirmed accuracy and efficiency of the present approach. This study serves as a benchmark for assessing the validity of numerical methods or two-dimensional theories used to analysis of laminated curved panels. © 2016 Society of Plastics Engineers. Source

Ahmadi M.,Young Researchers and Elite Club | Sami A.,Shiraz University | Rahimi H.,Shiraz University | Yadegari B.,Shiraz University
Computer Fraud and Security

For many years, malware has been the subject of intensive study by researchers in industry and academia. Malware production, while not being an organised business, has reached a level where automatic malicious code generators/engines are easily found. These tools are able to exploit multiple techniques for countering anti-virus (AV) protections, from aggressive AV killing to passive evasive behaviours in any arbitrary malicious code or executable. Development of such techniques has lead to easier creation of malicious executables. Consequently, an unprecedented prevalence of new and unseen malware is being observed. Reports suggested a global, annual economic loss due to malware exceeding $13bn in 2007.1 Traditional signature-based antivirus methods struggle to cope with polymorphic, metamorphic and unknown malicious executables. And analysing and debugging obfuscated programs is a tricky and cumbersome process. Now Mansour Ahmadi of Young Researchers and Elite Club, Shiraz Branch, Iran and Ashkan Sami, Hossein Rahimi and Babak Yadegari of Shiraz University, Iran have developed a novel framework based on runtime API call auditing and data mining, a method that achieved a malware detection rate of 98.4% in tests. Here, they detail their approach and the benefits it could bring. © 2013 Elsevier Ltd. Source

Khalili K.,Urmia University | Tahoudi M.N.,Young Researchers and Elite Club | Mirabbasi R.,Shahrekord University | Ahmadi F.,Shahid Chamran University
Stochastic Environmental Research and Risk Assessment

Investigation of the precipitation phenomenon as one of the most important meteorological factors directly affecting access to water resources is of paramount importance. In this study, the precipitation concentration index (PCI) was calculated using annual precipitation data from 34 synoptic stations of Iran over a 50-year period (1961–2010). The trend of precipitation and the PCI index were analyzed using the Mann–Kendall test after removing the effect of autocorrelation coefficients in annual and seasonal time scales. The results of zoning the studied index at annual time scale revealed that precipitation concentration follows a similar trend within two 25-year subscales. Furthermore, the PCI index in central and southern regions of the country, including the stations of Kerman, Bandarabbas, Yazd, Zahedan, Shahrekord, Birjand, Bushehr, Ahwaz, and Esfahan indicates a strong irregularity and high concentration in atmospheric precipitations. In annual time scale, none of the studied stations, had shown regular concentration (PCI < 10). Analyzing the trend of PCI index during the period of 1961–2010 witnessed an insignificant increasing (decreasing) trend in 16 (15) stations for winter season, respectively, while it faced a significant negative trend in Dezful, Saghez, and Hamedan stations. Similarly, in spring, Kerman and Ramsar stations exhibited a significant increasing trend in the PCI index, implying significant development of precipitation concentration irregularities in these two stations. In summer, Gorgan station showed a strong and significant irregularity for the PCI index and in autumn, Tabriz and Zahedan (Babolsar) stations experienced a significant increasing (decreasing) trend in the PCI index. At the annual time scale, 50 % of stations experienced an increasing trend in the PCI index. Investigating the changes in the precipitation trend also revealed that in annual time scale, about 58 % of the stations had a decreasing trend. In winter, which is the rainiest season in Iran, about 64 % of stations experienced a decreasing trend in precipitation that caused an increasing trend in PCI index. Comparing the spatial distribution of PCI index within two 25 years sub-periods indicated that the PCI index of the second sub-period increased in the spring time scale that means irregularity of precipitation distribution has been increased. But in the other seasons any significant variations were not observed. Also in the annual time scale the PCI index increased in the second sub-period because of the increasing trend of precipitation. © 2015 Springer-Verlag Berlin Heidelberg Source

Sayyadi S.Y.,Young Researchers and Elite Club | Ardestani V.E.,University of Tehran
Near Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics

The most important goal in hydrocarbon explorations is finding undersurface anomalies which have good quality for gas and oil explorations. Gravity data can be useful in fields with salt body structures. In our case study, Charak anticline has some out growing salt bodies. This anticline has arc image, it looks that an undersurface anomaly make this image. In this paper, in this paper To clarify this anomaly we improve the precision of inversion result, with minimum inertia, in Lewi algorithm .the result shows a salt body which have at least 2kilometeres depth that is a good place for exploring gas and oil. © (2015) by the European Association of Geoscientists & Engineers (EAGE). Source

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