Mathematicians: Making numerous contributions.
A mathematician is described as someone who uses logic or theory to solve problems. Mathematicians and their craft have been making milestones in history ever since the Neanderthal man became homo - sapiens and began communicating, with the use of speech.
The first period of time in the history of mathematics is known as the Chinese Egyptian Babylonian Period. This era starts in 50,000 B.C., and reaches to 601 B.C. During this primitive age, man used notches in bones, and clay tokens for counting. Sundials were used as a method of telling time and keeping track of the days. The most infamous mathematician from this time was Ahmes of papyrus. Ahmes was the author of the Egyptian scribe "The Rhind papyrus-; it is one of the oldest mathematical documents in existence.
The Greek Period (600B.C. - 499 A.D.) took mathematics far beyond the realm of counting and measuring time. The Greeks brought a variety of great minds to life, including Thales of Miletus, Archimedes, Apollonius, Euclid, and Democritus. They began using logic to explore new mathematical concepts. Pythagoras of Samos was one of the foremost logical minds of this age. He is the inventor of abstract mathematics, and the founder of the "Pythagoras Theorem-. This theorem is still used today, in modern geometric equations .
The Hindu Arabian Period (500A.D. - 1199A.D.), gave us Aryabhata the Elder and Muhammad ibn Musa al-Khowarizmi. Al-Khowarizmi wrote a very important Egyptian book titled "Al-jabr- His book helped to advance the study of algebra, and is responsible for coining the term we now know as algebra. This time period donated very few mathematical masterminds, however the contributions of this period are equally important .
Some of the more renowned names in the Transition Period (1200A.D. - 1599A.D.) are John Napier, Ludolf van Ceulen, Robert Recorde, and Simon Stevin. Leon Alberti wrote a revolutionary book, it described a method of achieving a more logical perspective in a mathematical manner.
The Heart Description: Your heart is about the size of your fist. ... The heart is a muscle; it acts like a small pump. ... The middle of the heart is called myocardium. ... • Coronary Heart Disease: It is the most common heart disease in the US today. ... Sometimes the heart will skip a beat, or it might be a continuous slow or fast heart rate. ...
THE HEART The heart is one of the most vital organs in the body. ... First, it keeps the heart contained in the chest cavity, second, it prevents the heart from over-expanding when blood volume increases, and third, limits heart motion. ... "# It provides an outer protective layer for the heart, keeps the heart contained in the chest cavity, and Prevents the heart from over-expanding when blood volume increases. ... Another disease or malfunction of the heart is, congestive heart failure (CHF), or heart failure, which is a condition in which the heart cannot pump enough blood to the bodies ...
HEART The human heart is a specialized, four-chambered muscle that maintains BLOOD flow in the CIRCULATORY SYSTEM. ... Since heart attacks are the number-one cause of death in the United States, the heart gets a great deal of attention. ... STRUCTURE AND FUNCTION OF THE HUMAN HEART The heart's wall has three parts. ... The output of the heart is expressed as the amount of blood pumped out of the heart each minute: the heart minute-volume (HMV). ... EVOLUTION OF THE HEART The hearts of primitive vertebrates apparently had only one atrium and one ventricle. ...
Each year thousands of people die from coronary heart disease. ... My husband 34 years of age, nearly died of heart attack. ... There are many factors that lead to heart attack. ... Heart disease is a silent killer. ... Taking care of your self will reduce heart disease. ...
Parasympathetic innervation of the heart originates in the Medulla Oblongata and travels via the Vagus nerve to the heart, where it splits into two sides of innervation. ... Sympathetic innervation of the heart serves to speed up the heart and increase the stroke volume. ... Marey's law of the heart describes the fact that an inverse relationship exists between arterial blood pressure and heart rate. ... If the right side of the heart is suitably distended by and increased pressure the heart elicits a tachycardic response to increase the cardiac output. ... Hypothyroidism has the opposite...
The primary prevention is designed to help patients manage their hearts before a heart attack by eliminating smoking, controlling blood pressure, eating a healthy diet, and exercising. Next, a secondary prevention method helps those already diagnosed with heart problems such as coronary heart disease, cerebrovascular disease, and peripheral vascular disease. ... However, it has been suggested that taking aspirin may reduce the severity of a heart attack and aid in thinning the blood, which could prevent blood clot forming in the arteries of the heart. ... It has been noted that "regular con...
All muscles in the heart require oxygen to operate correctly. ... When the heart cannot get oxygen, the heart muscle is damaged and heart attacks occur. A heart attack is also known as a myocardial infraction. ... He can also view the performance of the heart and its valves. ... The patient must not strain the heart in any strenuous activities. ...
Heart Attacks Heart attacks are the leading cause of death in the United States. Heart attacks are caused by blockage in the arteries that carry blood to parts of the heart. ... If a small part of the heart dies, the heart can remain alive without it. But if a big part of the heart dies, it can cause death. ... Heart attacks can also be due to a blood clot. ...
The average heart rate was 55.5 beats per minute. ... The body needs to maintain a constant cardiac output, which is the stoke volume, the volume of blood out each time the heart beats, multiplied by the heart rate, the number of times the heart beats per minute. ... Therefore stroke volume and heart rate should be low. ... This increases the physical activity will mean that the heart will beat faster to supply the respiring cell with oxygen thus increasing heart rate. ... This may be because the subject is quite a fit person, so therefore has a low heart rate, as his/her heart is particularly...
There have been many different models for artificial hearts but none as promising as the newest product by Abiomed. ... However the history of artificial heart research spans farther back than this. ... Beyond that, some doctors used artificial hearts as temporary solutions for pending heart transplant patients (Nunn). ... Abiomed has designed this device to service the needs of patients suffering from coronary heart disease or congestive heart failure. The Abiocor Artificial Heart shows the possibilities when different sciences come together. ...
