Needle Aspiration Biopsy:

Needle aspiration biopsy (NAB), also known as fine needle aspiration cytology (FNAC), fine needle aspiration biopsy (FNAB) and fine needle aspiration (FNA), is a practice performed to analyze certain kinds of medical conditions, such as lumps in the neck. In this technique a thin needle is inserted into a mass or lump to extract cells that will be examined under a microscope. Fine needle aspiration biopsies are very safe, minor surgical procedures. Often, a major surgical (excisional or open) biopsy can be avoided by performing a needle aspiration biopsy instead.

A needle aspiration biopsy is safer and less shocking than an open surgical biopsy. Sometimes, surgery is needed to treat complications of a needle aspiration biopsy. But in such a case, the patient would have had to undergo a similar surgical procedure to obtain a diagnosis had the needle aspiration biopsy not been attempted.

Theory of Computation:

The theory of computation is the branch of computer science that deals with whether and how efficiently problems can be solved on a computer. The field is divided into two major branches: computability theory and complexity theory, but both branches deal with formal models of computation.

In order to perform a thorough study of computation, computer scientists work with a mathematical abstractions of computers called a model of computation. There are several formulations in use, but the most commonly examined is the Turing machine. A Turing machine can be thought of as a desktop PC with an infinite memory capacity, though it can only access this memory in small separate chunks. Computer scientists study the Turing machine because it is simple to formulate, can be analyzed and used to prove results, and because it represents what many consider the most powerful possible "reasonable" model of computation. While the infinite memory capacity might be considered an unphysical attribute, for any problem actually solved by a Turing machine the memory used will always be finite, so any problem that can be solved on a Turing machine could be solved on a desktop PC which has enough memory installed.

Humour

Humour also spelled humor is the capability or quality of people, objects, or situation to evoke feelings of amusement in other people. The terms encompass a form of entertainment or human communication which evokes such feelings, or which makes people laugh or feel happy. The origin of the term derives from the humoural medicine of the ancient Greeks, which stated that a mix of fluids known as humours prohibited human health and emotion.

A sense of humour is the ability to knowledge humour, a quality which all people share, although the extent to which an individual will personally find impressive humorous depends on a host of absolute and relative variables, including, but not limited to geographical location, culture, maturity, level of education and context. For example, young children of any background particularly favour slapstick, while satire tends to appeal to more mature audiences.

Sunflower

The sunflower is an annual plant in the family Asteraceae, with a large flower head.The stem of the flower can grow up to 3 metres tall, with the flower head reaching 30cm in diameter. The term "sunflower" is also used to refer to all plants of the genus Helianthus, many of which are perennial plants.What is usually called the flower is actually a head of numerous flowers crowded together. The outer flowers are the ray florets and can be yellow, maroon, orange, or other colors. These flowers are sterile. The flowers that fill the circular head inside the ray flowers are called disc florets.

The arrangement of florets within this cluster is typically such that each is separated from the next by approximately the golden angle, producing a pattern of spirals where the number of left spirals and the number of right spirals are successive Fibonacci numbers. Typically, there are 34 spirals in one direction and 55 in the other; on a very large sunflower you may see 89 in one direction and 144 in the other.