For regions where f ''(x) is positive, the function is concave up; where f ''(x) is negative the function is concave down. So, looking at the graph of f '(x), wherever slope is positive, you've got a positive second derivative and the function is concave up.
U-Meleni was a part of a group of Artists conducting workshops on spoken word and creative writing showing how it can be used to empower and create change. U-Meleni then travelled to ZIMBABWE for three weeks ( Aug 13-Sept 2, 2006) to spend time with family and friends.
Melena (Overview) Melina is blood in the stool that is black, tarry, sticky, and smelly. The blood in melena comes from high up in the gastrointestinal tract, and gets partially digested which is why it changes to melena. Bright red blood comes from lower in the GI tract.