Recent advances in numerical simulation and control of asymmetric flows around slender bodies

The problems of asymmetric flow around slender bodies and its control are formulated using the unsteady, compressible, thin-layer or full Navier-Stokes equations which are solved using an implicit, flux-difference splitting, finite-volume scheme. The problem is numerically simulated for both locally-conical and three-dimensional flows. The numerical applications include studies of the effects of relative incidence, Mach number and Reynolds number on the flow asymmetry. For the control of flow asymmetry, the numerical simulation cover passive and active control methods. For the passive control, the effectiveness of vertical fins placed in the leeward plane of geometric symmetry and side strakes with different orientations is studied. For the active control, the effectiveness of normal and tangential flow injection and surface heating and a combination of these methods is studied

Power Triangle: Military, Security, and Politics in the Shaping of the Egyptian, Iranian, and Turkish Regimes

The dissertation explains why similar coup-installed regimes in Egypt (1952), Iran (1921), and Turkey (1923) developed along different political trajectories (authoritarianism, royal absolutism, and democracy, respectively). While most studies of regime change tend to underline popular forces, I demonstrate that these changes cannot be fully comprehended without a grasp of the shifting power balance within the ruling bloc. I argue that these divergent paths were determined by the ensuing power struggle between the military, security, and political institutions. A thorough comparative and historical examination of the critical junctures that marked the path of this unfolding power relation reveals that the ultimate dominance of the security establishment created an authoritarian police state in Egypt; the dominance of the political apparatus in Iran produced a monarchy vulnerable to overthrow from below; and the dominance of the military allowed enough space for a limited yet expanding democracy to develop in Turkey

Effect of Melatonin-loaded Chitosan Nanoparticles (CMN) on Gene Expression of In-vitro Matured Buffalo Oocyte

This study aimed to evaluate the effect of melatonin and melatonin-loaded chitosan nanoparticle (CMN) supplementation to maturation media on buffalo oocyte maturation rate and relative expression of genes: growth differentiation factor 9 (GDF9), bone morphogenetic protein 15 (BMP15), B Cell Lymphoma 2 (BCL2), Associated X protein (BAX) and superoxide dismutase 1 (SOD1). Buffalo ovaries were heaved from Al-Mounib slaughterhouse, cumulus-oocyte complexes (COCs) were in vitro matured in three different media, TCM-199 medium (control), TCM-199 with melatonin 10-9M, and TCM-199 with CMN 10-9M. The assessment of the nuclear maturation rate was carried out through the presence of the first polar body. In addition, the mature buffalo oocytes were stored on RNA later for genetic analysis of GDF9, BMP15, SOD1, BCL2, and BAX genes using quantitative real-time PCR (qRT-PCR). The results were reported that buffalo oocytes supplemented with melatonin-loaded chitosan nanoparticle (CMN) or melatonin have a significant effect on nuclear maturation rate 94.04±0.65 and 88.74±0.77 respectively when compared with buffalo oocytes matured with basic media (control) 79.67±1.35. Furthermore, buffalo oocytes supplemented with melatonin-loaded chitosan nanoparticle (CMN) or melatonin showed significant upregulation of GDF9, BMP15, SOD1, and BCL2 genes and significant downregulation of BAX gene when compared with oocyte matured with basic media (control). In conclusion, the results of nuclear maturation rate and relative expression pattern of GDF9, BMP15, SOD1, BCL2, and BAX reflect that melatonin-loaded chitosan nanoparticle (CMN) and melatonin` may play an important role in the buffalo oocytes developmental competence