A face transplant involves transplanting facial material from a cadaver donor to someone else, and can be used to address congenital birth defects or replace a damaged face. There are two types of transplant: partial and complete. The surgery is complex and patients must take lifelong immunosuppressive drugs to prevent rejection. The resulting face is […]
CNG conversion kits allow vehicles to run on compressed natural gas, a cheaper and greener alternative to gasoline and diesel. Kits can be installed manually or automatically, but must be EPA or CARB certified and installed by a Qualified Systems Fitter. Savings from the conversion can cover the cost of the kit and installation, and […]
Coffee cake mix is a prepackaged mixture of ingredients used to make a sweet breakfast. It can be made at home or bought in stores and is often enjoyed with a cup of coffee. The cake is traditionally topped with streusel and can be made with various flavors and fillings. It is typically baked in […]
Torsional stiffness measures the amount of torque a rotating shaft can handle in a mechanical system. It is critical to understand the stress a shaft can withstand. Torsional stiffness and bending stiffness are measured in pounds per inch or newtons per meter. The rate of torsional stiffness is highest along the taut outer layer and […]
Silicon diodes are semiconductors that allow electric current to flow in one direction while limiting it in another. They are made by adding small amounts of other elements to pure silicon, creating a pn junction. The diode has a forward bias of 0.7 volts and can protect other devices in a circuit. Zener diodes can […]
End stage renal disease (ESRD) is when the kidneys are failing and will never recover, functioning at no more than 10% capacity. It usually doesn’t come on quickly, and patients may live for years with compromised kidneys. Treatment options include hemodialysis, peritoneal dialysis, or kidney transplantation. Some choose not to treat ESRD due to quality […]
A soil pile connects indoor plumbing to the sewer and vents gases out of a building. Wastewater flows through a pipe to a centrally located soil pile, where solids and liquids travel down and gases travel up. The top end of the soil pile is usually an open tube that vents gases into the atmosphere. […]
Rendering plants recycle dead animals into products such as pet food and biodiesel. Slaughterhouse remains and waste are the main contributors, but dead animals from farms, zoos, and veterinary clinics also end up there. The final products contain heavy metals, pesticides, and other toxic waste. The process also produces products for human consumption such as […]
A forklift with a winged platform can lift boats out of the water, replacing traditional dry docking and launching techniques. The platform can be lowered underwater to navigate a ship and lift it partially or completely out of the water for maintenance. It can also be used to build ships and move ferries and supplies. […]
Dark chocolate frosting can be made with cocoa powder or melted dark chocolate, mixed with butter and powdered sugar. Some dark chocolate bars contain enough sugar to make them sweet enough for frosting. A recipe for dark chocolate fudge candy frosting uses chopped dark chocolate instead of cocoa powder. A third option is to use […]
Gate valves control water flow in various industries and locations. They can be made of wood or metal and slide vertically or act like a flap. Gates regulate water movement for flood control and agriculture. Penstocks are often moved by hydraulic systems, while sluice gates were historically used in mills. Fish cannot pass through gates […]
Air conditioners and refrigerators require a correct charge of refrigerant gas to function properly. Leaks or repairs may cause depleted levels, requiring recharging using a refrigerant charge manifold and a non-return service port or valve. Signs of depleted refrigerant charge include low efficiency, freezing coils, and oily residue. Recharging should be done with the compressor […]
Brain abscesses are caused by infections in the brain or other parts of the body and can be fatal if left untreated. Symptoms include swelling, seizures, and confusion. Treatment options include surgery and antibiotics. Prompt medical attention is necessary for neurological symptoms. A brain abscess is an encapsulated area of dead cells, pus, infected tissue, […]
A housing market study can gather data on buying and selling trends, new construction or renovation needs, demographics, and consumer confidence. There are two main types of studies: area-wide and specific. Specific studies are project-based and require specific objectives, reliable data collection, and careful analysis. Real estate market studies can impact the investment market by […]
Cheese mashed potatoes are made by adding cheese to homemade or instant mashed potatoes, with options for additional ingredients like garlic or bacon bits. Cheddar and American cheese are common choices, and the dish can be served with extra cheese on top. Cheese mashed potatoes are a variation of plain mashed potatoes. To make these […]
Structural unemployment is caused by a mismatch between job vacancies and applicants’ skills or location. It cannot be solved by one-time stimulus measures, but training programs and tax breaks for companies could help. However, it is unlikely to be completely eliminated due to changing market conditions. Structural unemployment, one of the main types of unemployment, […]
A fastback car has a roof that slopes constantly from the front to the rear, providing ideal aerodynamic properties. The design can be curved or straight, with varying lean angles. The Stout Scarab may have been one of the first cars to use this design. Fastbacks have a low coefficient of drag, making them ideal […]
Mastic adhesive is a strong adhesive used in construction, made from the resin of the mastic tree or synthetically. It can bond many materials together quickly and permanently, but works best on hard, non-porous surfaces. It is popular for laying tiles and sealing windows, walls, and ceilings. Mastic trees grow in Greece and Turkey, and […]
The construction industry includes various types of work such as carpentry, road construction, and home design. It has three main parts: general contractors, specialist commercial construction, and civil engineering construction. The industry requires physical fitness and safety equipment due to the dangerous tools and equipment used. Some jobs require only a high school diploma, while […]
The agricultural industry includes growing and raising produce, livestock, flowers, timber, and crops for sale. It dates back thousands of years and includes biotech companies, veterinarians, florists, and wineries. The beginning of agriculture marked the beginning of civilization, and most products are considered part of the primary sector. The industry has seen changes due to […]
