Men and Women Essay Example | Topics and Well Written Essays - 500 words

Men and Women - Essay Example Moreover, they also have similarities and differences in terms of emotional and psychological needs which will be dealt with in detail. Firstly, men and women have similar physical needs such as food, clothing and shelter. Both genders need food and water in order to live. They also need clothing not only to beautify themselves but especially to keep them away from the dangers of the environment such as the dangerous effects of the heat of the sun or from the cold during winter. Shelter is also necessary for both men and women to keep them secure. Secondly, they have similar emotional needs such as the need to be loved. Since love is said to be the universal language, it is evident that people around the world regardless of race, age and gender need this emotional value that seems to be naturally a part of every individual. In addition, men and women experience pain, discouragements and other negative emotional stressors that affect the way they live. Thus, they also need emotions that soothe the pains such as joy, assurance and encouragements to lift their spirits and enable them to overcome the difficulties life b rings. Thirdly, men and women also have similar psychological needs. Since they have similar fears and concerns, men and women need similar psychological interferences. For instance both men and women worry about how they look so they both need to be assured that they look good. When they have achieved something, both men and women need to be praised for their success or they will feel like they are failures. On the other hand, there are also differences between men and women that make them distinctly different from each other. First among these differences would be their physical needs. For instance, women are known to be more concerned about how they look therefore, they spend more time and money on their clothing, accessories and make up. They spend a lot of time thinking about how they would appear so that women often end up spending

Recent Developments in the use of Titanium Alloys as Implant Materials Essay

Recent Developments in the use of Titanium Alloys as Implant Materials - Essay Example One of the main objectives of implants is to be chemically inert and biocompatible with body so that it may not be deteriorated by the body fluids. Titanium and its alloys are the materials that fulfill these criteria, so they may be used as implants with certain checks that require some studies. Biomedical implant reliability depends on the corrosion, wear, and fatigue resistance of the materials. Unalloyed titanium grades are largely used for implants and other parts which do not have to cope with high loads in the human body, while titanium alloys predominate in applications for endoprotheses and surgical instruments (http://www.metallurgy.nist.gov/techactv1995/titanall.html). Unalloyed titanium and titanium alloys have been used for years in medical engineering for a wide range of applications, some examples of which are listed below: Medical grade titanium alloys have a significantly higher strength to than stainless steels. The range of available titanium alloys enables medical specialists designers to select materials and forms closely tailored to the needs of the application. The effectiveness and reliability of implants, and medical and surgical instruments and devices is an essential factor in saving lives. Implantation represents a potential assault on the chemical, physiological and mechanical structure of the human body. There is nothing comparable to a metallic implant in living tissue. Most metals in body fluids and tissue are found in stable organic complexes. Corrosion of implanted metal by body fluids, results in the release of unwanted metallic ions, with likely interference in the processes of life. Corrosion resistance is not sufficient of itself to suppress the body's reaction to cell toxic metals or allergenic elements such as nickel, and even in very small concentrations from a minimum level of corrosion, these may initiate rejection reactions. Titanium is judged to be completely inert and immune to corrosion by all body fluids and tissue, and is thus biocompatible. 3.1. Objectives: To determine the suitability of titanium for use as surgical implants. Studies of coupled metals in dentistry alloyed with titanium. Development of standards for titanium alloys and for updating existing standards. Studies on response of pure and alloyed titanium to model surgical wound environment. 4. Theoretical Background 4.1. How Implants affects Bogy Functions The oxide film forms the interface between the metal implant and the body, its properties are