The effect of internal acoustic excitation on the leading-edge, separated boundary layers and the aerodynamic performance of NACA23015 cross section airfoil are examined as a function of excitation location with ranging frequency range (50-400) Hz of the introduced acoustic. Tests are separately conducted in two sections, open type wind tunnels at the Reynolds number of 3.3x105 for measurement at angle of attack (0, 3, 6, 9 &12) deg. and 3x104 for the visualization at angle of attack (12) deg. based on the airfoil chord. Results indicated that the excitation frequency and the excitation location are the key parameters to alter the flow properties and thus to improve the aerodynamic performance. The most effective excitation frequency

Background: Various herbal extracts are known to provide therapeutic benefits in the oral cavity when used topically. One of these herbs is cardamom which is a dried fruit of the tall permanent herbaceous plant, have its place in the family Zingiberaceae.
Objectives: Test the effect of green and black cardamom extracts on Lactobacilli in comparison to chlorhexidine gluconate 0.2% and de-ionized water.
Materials and methods: Dried fruits of green and black cardamom were extracted by using alcohol 70% ethanol. Saliva was collected from seven volunteers. Agar well technique with different concentrations of green and black cardamom extracts was used to test the sensitivities of Lactobacilli, as well the effects

In this work we run simulation of gas dynamic problems to study the effects of Riemann
problems on the physical properties for this gas.
We studied a normal shock wave travels at a high speed through a medium (shock tube). This
would cause discontinuous change in the characteristics of the medium, such as rapid rise in
velocity, pressure, and density of the flow.
When a shock wave passes through the medium, the total energy is preserved but the energy
which can be extracted as work decreases and entropy increases.
The shock tube is initially divided into a driver and a driven section by a diaphragm. The
shock wave is created by increasing the pressure in the driver section until the diaphragm bursts,
se

Abstract: The researcher aims to highlight the historical frames of political development in royal regime era (1921-1949) and study its transitions on social-political aspect for the various periods during this consistent era of Iraq history. As some elements played an important role in shaping this era’s features ,as well as 2hat succeed it, which mainly affected the political progression’s configuration, such as : political culture role, social and cultural foundation, state policy essence and the unofficial institutions remarkable role in influencing public awareness and concerning it's relation to the state ,the clan and religious institutions. The researcher employed Alexis de Tocqueville’s evaluation criteria and indi

This study seeks to clarify the adequacy of the current legal texts - procedural and objective - to respond to our situation under Corona and whether it needs to modify or develop treatment for this general exceptional circumstance or to avoid it, and the appropriateness of the idea of force majeure or emergency circumstance or (the idea of foreign reason) to face the consequences or effects of Corona on the rules of litigation and the formation of the court and its jurisdiction and procedural appointments and litigation procedures and appeal and judgment and its implementation in order to maintain and implement the public order that interferes with the mechanisms and measures taken It is intended and has legal and judicial implications