Bias voltage is an electrical charge applied to the gate or base of a transistor or vacuum tube, controlling the amount of current flowing through it. It enables switching functions and directs current flow, allowing for fine control of amplification. Bias voltage is essential to transistor theory and electronic engineering. Bias voltage typically refers to […]
Normal tension glaucoma is a type of glaucoma that causes damage to the optic nerve even when the pressure within the eye is normal. The causes are unknown, but theories suggest decreased blood flow or weaknesses in the optic nerve. Risk factors include family history, cardiovascular disease, and Japanese descent. Treatment involves keeping intraocular pressure […]
Ice class ships have special construction provisions and qualities to operate in icy waters without sustaining damage. They have thicker hull material, increased spars and bulkheads, special rudder and propeller features, heated fuel and ballast tanks, and improved sea chests. They receive special high-tensile strength keel and hull materials, and have heating elements within the […]
A parapet wall is a low wall that encloses a roof or provides a protective barrier at the edge of a terrace or bridge. They were originally used for defense but now serve to prevent accidents and fires. Different types of parapets include crenellated, pierced, paneled, and plain. Modern buildings require parapets for safety reasons, […]
Road oil is a thick, dark asphalt product used to protect and seal roads. It can be purchased from manufacturers or hardware stores. It can cause stains and blockages and should be handled with protective clothing. It can be used to periodically seal roads and fill potholes temporarily. Eventually, roads will need to be repaved. […]
New South Wales is Australia’s largest state in population, with a coastline of 8,293 miles and the highest point being Mount Kosciusko. It was the site of the first British settlement in Australia and is home to Sydney, the country’s largest city. The state plays a vital role in Australia’s economy, producing a large proportion […]
A stool test can diagnose abnormalities such as infection, parasites, or colon cancer. Samples are usually collected at home and sent to a lab for testing. Results can prompt further medical attention and treatment. A stool test is a medical procedure in which a small stool sample is collected and tested for abnormalities such as […]
Rocker switches are one-piece switches commonly used as light switches and in other applications. They are easy to use and can be wired in a multi-way switch system. When repairing or replacing, cut off power to the circuit. A rocker switch is a one-piece switch that swings back and forth in response to pressure to […]
Water mains are primary pipelines that transport treated water to consumers through secondary feeders. Water is treated and purified before being pressurized for distribution. Infrastructure problems arise from poor maintenance, causing pipe failures and water problems in some cities. A water main is a primary pipeline used to move water from a purification and treatment […]
VIPoma is a rare cancer affecting hormone-producing cells in the pancreas, causing high levels of vasoactive intestinal peptide (VIP). Symptoms include watery diarrhea and dehydration. Treatment is palliative, with surgery providing a cure if the cancer hasn’t spread. VIPoma is an extremely rare form of cancer, affecting only one in ten million people each year. […]
A snow ATV can have tracks or tires designed for snow and ice, with accessories like a plow blade. Winterizing the vehicle is important, including using lubricants for cold temperatures and installing canopies and mud flaps. A snow ATV is an all-terrain vehicle designed or altered to function efficiently in snowy conditions. This may mean […]
Backfill is natural material used to fill voids after construction or excavation. It stabilizes mines, protects building foundations, fills trenches, and stabilizes pipes. It’s environmentally friendly, practical, and saves time and money. The backfill is mostly natural material that is used to fill in some voids left after construction or excavation efforts. Usually, backfill is […]
The floating workweek, designed to protect employees from receiving less than normal wages, has changed to benefit employers. The complex rules require careful control of employee hours to avoid violating minimum wage laws, and legal advice is recommended. Employers are using the model to hire fewer employees to save money on overtime pay. The floating […]
An electric winch uses an electric motor to wind a steel cable or flat nylon strap to pull an object towards the winch. It typically uses a 12-volt battery, and a crank can be used in case of a dead battery. It should not be used as a primary tie-down device. An electric winch is […]
Afghan bread, or Noni Afghani, is a flatbread served with almost every meal in Afghanistan. It is made with a mix of whole wheat and white flour, and can be flavored with cumin, sesame, or poppy seeds. The dough is shaped by hand and baked in a traditional oven, and is often served with yogurt […]
The cam pulley controls the camshaft’s rotational speed, which opens and closes the cylinders. It is checked during timing belt replacement and can be replaced in high-performance vehicles. Adjustable pulleys and dual camshafts are used to adjust timing. During a timing belt change, the mechanic must ensure correct alignment. Aftermarket parts may void the warranty. […]
Circulation area is the space in a building that provides access to all areas and must meet safety and accessibility regulations. It includes hallways, elevators, and loading docks. Ceilings and width requirements must be met. It cannot be sold or leased and is important for square footage calculations and government requirements. Blueprints and CAD drawings […]
Porton Down is a secretive research facility in England, established in 1915 for chemical warfare research. It has expanded to include nerve agents, biological agents, and riot control tactics. The lab uses animals for testing and has attracted controversy from the animal rights community. It also uses human volunteers in tests, sometimes in controversial ways. […]
Acute disseminated encephalitis is an autoimmune condition where the body’s immune cells attack the myelin sheath of nerves in the brain and spinal cord, resulting in neurological symptoms. It can be caused by infections or immunizations and is treated with anti-inflammatory agents. Recovery usually occurs within one to six months, but complications may occur. Acute […]
Aeration tanks increase the amount of air in liquid, commonly used in wastewater recovery. Two main methods are forcing air through liquid or liquid through air. There are two types of aeration tanks, shallow and wide for air forced through and tall for water into air. Air to water tanks have nozzles that force air […]
