Valves

tubing length of about 148 cm. Earlier heralds did not have valves, but modern instruments typically have either three piston…

HλLF-LIFE Half-Life, a science fiction first person shooter developed by Valve Corporation, it was their first video game to be released. At the time Valve was creating this game they were an unknown game company. It was very hard for Valve to find a publisher but they had what Sierra Entertainment wanted, a game based on the Quake engine, later signing Valve on a one-game deal. The game was released on November 8, 1998, on Windows, PlayStation 2, OSX, and Linux. Developed on the GoldSrc…

What conditions contribute to turbulent blood flow or heart murmurs. Turbulent blood flow occurs as blood moves through narrowed or leaking valves producing a swooshing sound over the precordium and a high heart rate combine with narrowing, causing the heart to handle a larger amount of blood flow than normal; the basis is increased blood velocity, structural valve malfunction, or atypical chambers. Some pathological causes of heart murmurs are anemia, high blood pressure, overactive thyroid,…

first trimester to become the heart. The heart is made up of four chambers: the right atrium, the left atrium, the right ventricle, and the left ventricle. There are two atrioventricular valves: the tricuspid valve in the right side and the mitral valve in the left side. There are also the pulmonary and aortic valves that originate from the right and the left ventricles. The heart is located in the mediastinum. During embryonic development, oxygenated blood from the placenta flows into the right…

Ultrasound in Patients with Ebstein’s Anomaly Ebstein’s Anomaly of the tricuspid valve is a disease close to my heart, because I was diagnosed with it at birth and it has been a part of my life and a factor of inspiration toward the field of medical imaging. It has affected my health negatively, yet affected my life positively. I have seen every test and imaging modality involving this condition and its understanding. Ebstein’s anomaly is a congenital heart defect that counts for less than 1% of…

is made because the blood passing through the heart’s valves and chambers make a sound. Sometimes, the valve doesn’t open entirely, and the blood goes back to the chamber it just left. When that happens, it makes a swishing noise, making it easy to find. Generally, heart murmurs are not exactly dangerous, unless it is abnormal. Abnormal heart murmur is caused, in children, by congenital heart disease. Adults may get it as well by heart valve problems. People do not naturally…

that look like the trumpet. Instrument design, as well as metal making, improved tremendously over the Middle Ages and the Renaissance, which made these "natural trumpets" more suitable for creating actual music However, these trumpets did not have valves and could only produce a small amount of notes. Also, changing the key meant that you had to change different pipes on the horn. In fact, many examples of the "natural trumpet" can be found easily on You Tube. Due to its limited amount of…

later in Britain and America, as a result of the popularity and movements of instrument makers such as Gustave Auguste Besson and Henry Distin . Afterwards there have been many other various types of the Tuba including some with different types of valves different numbers and more. Role An orchestra usually has a single tuba, though an additional tuba may be asked for. It serves as the bass of the orchestral brass section and it can reinforce the bass voices of the strings and woodwinds. It…

reaction of incidents. After the turbine had shut down and radioactive fluids started overflowing the release valves were opened and coolant waters were rushed in. This coolant water cooled the turbines but then was exposed to the radiation. Now there had already been a couple technical errors that occurred leading up to this so the workers there could not get a lucky bounce this day. The release valves that had previously been open had a technical fault occur because of the radiation affecting…

is a muscular organ located in the thoracic cavity; it is responsible for pumping the blood to rest of the body through the circulatory system.1 It is composed of four chambers: left & right atrium and ventricle, these two chambers are separated by valves(atrioventricular), whereas the left and right side of heart is separated by interventricular septum.1 Walls of heart are composed of cardiac myocytes, these cells contain myofilaments, each unit is composed of contractile protein called actin…