Friday, February 28, 2020

Persuasive speech Essay Example | Topics and Well Written Essays - 250 words - 5

Persuasive speech - Essay Example People going to public places such as hotels or even some schools face the wrath of isolation. They are regarded as strangers or even terrorists and are stared at surprisingly. 2- Fear of physical harm. People opposed to wearing of hijabs have always assaulted girls wearing the hijabs in different countries such as France and other public places such as schools. They are always suspected to be hiding something behind their hijabs (Elawawadh Web). As a result of assault and discrimination, many girls have opted out of Islam and joined other religions or secular world. They fear the level of discrimination driven towards people wearing hijabs (â€Å"BBC News† Web). - Media has played a huge role in escalating challenges affecting people wearing hijabs. Through the media, such as social media and the television or newspaper, people around the world have been made to understand that terrorists are Muslims. The fear of interacting or rather mixing with Muslims has led to the isolation and physical abuse of people wearing hijabs (Elawawadh Web). Girls wearing hijabs do not have the knowledge on why they should wear the hijabs. They do not understand the benefits or even the meaning of wearing the hijabs (Asser Web). The knowledge should also be spread among people who discriminate against people wearing hijabs. They should understand that it is won for a good cause (Vyver Web). 2- Proper institutions and legal framework should be put in place to protect girls wearing hijab (Syed Web). Schools and other public places need to protect people wearing hijabs by introducing stern measures to punish any form of discrimination or physical assault. 3- Media should act as the number one messenger that promotes hijab wearing among Muslim girls (â€Å"BBC News† Web). They should bring in Muslim sheiks and clerics as well as leaders who support girls wearing hijabs. Wearing hijab is a command from Allah and it plays a major role in maintaining integrity and

Wednesday, February 12, 2020

Finite Element Analysis of structures Essay Example | Topics and Well Written Essays - 1750 words

Finite Element Analysis of structures - Essay Example Each element contains nodes which are points were the elements are mathematically connected to one another. The idea of dividing a domain up into subdomains is the basic principle of how FEA works' FEA consists of a computer model of a material or design that is stressed and analyzed for specific results. It is used in new product design, and existing product refinement. A company is able to verify a proposed design will be able to perform to the client's specifications prior to manufacturing or construction. Modifying an existing product or structure is utilized to qualify the product or structure for a new service condition. In case of structural failure, FEA may be used to help determine the design modifications to meet the new condition. There are generally two types of analysis that are used in industry: 2-D modeling, and 3-D modeling. While 2-D modeling conserves simplicity and allows the analysis to be run on a relatively normal computer, it tends to yield less accurate results. 3-D modeling, however, produces more accurate results while sacrificing the ability to run on all but the fastest computers effectively. Within each of these modeling schemes, the programmer can insert numerous algorithms (functions) which may make the system behave linearly or non-linearly. Linear systems are far less complex and generally do not take into account plastic deformation. Non-linear systems do account for plastic deformation, and many also are capable of testing a material all the way to fracture. How Does Finite Element Analysis Work' FEA uses a complex system of points called nodes which make a grid called a mesh . This mesh is programmed to contain the material and structural properties which define how the structure will react to certain loading conditions. Nodes are assigned at a certain density throughout the material depending on the anticipated stress levels of a particular area. Regions which will receive large amounts of stress usually have a higher node density than those which experience little or no stress. Points of interest may consist of: fracture point of previously tested material, fillets, corners, complex detail, and high stress areas. The mesh acts like a spider web in that from each node, there extends a mesh element to each of the adjacent nodes. This web of vectors is what carries the material properties to the object, creating many elements. A wide range of objective functions (variables within the system) are available for minimization or maximization: Mass, volume, temperature Strain energy, stress strain Force, displacement, velocity, acceleration Synthetic (User defined) There are multiple loading conditions which may be applied to a system. Next to Figure 3, some examples are shown: Point, pressure (Figure 3), thermal, gravity, and centrifugal static loads Thermal loads from solution of heat transfer analysis Enforced displacements Heat flux and convection Point, pressure and gravity dynamic loads Each FEA program may come with an element library, or one is constructed over time. Some sample elements are: Rod elements Beam elements Plate/Shell/Composite elements Shear panel Solid elements Spring elements Mass elements Rigid elements Viscous damping elements Many FEA programs also are equipped with the capability to use multiple materials within the structure such as: Isotropic, identical throughout Orthotropic, identical at 90 degrees General anisotropic, different throughout Types of