Quiz Essay Example | Topics and Well Written Essays - 250 words - 7

Quiz - Essay Example he computer screen behind the objective of staying connected to the people online, he does not know that to stay connected online, he is getting disconnected from the world around him, and is getting oblivious of those living around him, who need him and can make him happier than the online community. The social isolation creates adverse effects on the family relationships because online socializing works by dissociating social relationships from physical actuality. Today, we are always connected to the people we know, whether we are sitting on our couch or we are out of town, yet we are suffering from depression, anxiety and loneliness. Today, we are all the time getting updates from our friends, relatives and classmates; and, we do not have to schedule face-to-face meetings in order to stay in each other’s lives. And, all this has been possible thanks to the online social networking websites which offer great fun and mind-engaging applications in addition to letting us find people of our own interests and hobbies. However, this has resulted in people hesitating in interacting with others in the physical world. They are hiding from the bitter events that come with real relationships. They do not want to make commitments with physical world relationships. So, they find a way out in the form of online socializing. They are, however, unaware of the fact that this epidemic of social media will make them socially excluded; and, time will come when they will become totally oblivious to real feelings and

Dislocation and strengthening mechanism on various materials Essay - 1

Dislocation and strengthening mechanism on various materials - Essay Example Composites are strengthened in a similar fashion by reinforcing the material matrix with particles or fibers. Fiber reinforced plastics (FRP) are the most commonly used composites [2]. The fibers act as load carrying mediums while the surrounding filler works to transmit the load to the fibers. At times polymers possessing higher material strength are required. There are three basic fundamental means of increasing material strength for polymers; these are crystallization, cross-linking and chain-stiffening [3]. Crystallization causes polymers to gain regularity in their molecular arrangement. Cross-linking is a process by which adjacent molecular chains are bonded with one other through covalent bonds. Chain-stiffening involves a number of methods through which chain bending is restricted. . Strengthening mechanisms for metals include grain size reduction, solid-solution strengthening and strain hardening. Grain size reduction involves reducing the grain size of the metal. The reduction in grain size obstructs dislocation motion when stress is applied. At a macro level, the material appears to have more strength. Solid-solution strengthening involves introducing impurity atoms in the interstitial solid solution. Strain hardening is also known as work hardening or cold work. Cold work is a process by which a ductile metal is plastically deformed resulting in a metal that is harder and stronger. Furthermore, recrystallization is a process by which a cold worked material regains its precold-worked properties. As mentioned afore, cold work or strain hardening is a inexpensive process by which a ductile metal is hardened through plastic deformation. The process is performed well below the absolute melting point of the metal [4]. There are a number of advantages related to strain hardening. The materials maybe strain hardened and molded into desired shape simultaneously while still being able to achieve superb dimensional tolerance and surface