Call your doctor immediately if you have: 1  Blood in your diarrhea or black, tarry stools. 2  A fever that is high (above 101 F) or that lasts more than 24 hours. 3  Diarrhea lasting longer than 2 days.  Nausea or throwing up that prevents you from drinking liquids to replace lost 1  fluids. Severe pain in your abdomen or rectum.
The discipline of engineering is extremely broad, and encompasses a range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied science, technology and types of application.
Materials Engineering is a field of engineering that encompasses the spectrum of materials types and how to use them in manufacturing. Materials span the range: metals, ceramics, polymers (plastics), semiconductors, and combinations of materials called composites.echanical engineering is one of the largest, broadest, and oldest engineering disciplines. Mechanical engineers use the principles of energy, materials, and mechanics to design and manufacture machines and devices of all types. They create the processes and systems that drive technology and industry. more information.