The 24-hour mountain bike race is the most demanding, requiring intense physical and mental preparation. Cyclists ride non-stop for 24 hours, requiring food, water, and support for both the body and the bike. Powerful lights are needed for night riding, and the race can be done solo or as a team. Mental exhaustion is as […]
Cycle lanes are designated sections of roads for bicycles, used in traffic management strategies. They can be controversial, but encourage cycling and reduce conflicts between cyclists and pedestrians. Bike lanes need to be coupled with common sense and both cyclists and motorists must be responsible for safety. Cycle lanes are specially designated sections of a […]
A news cycle is the time between the release of a news bulletin and the follow-up edition. It was originally associated with newspapers but is now applied to all forms of news distribution. Magazines and TV news have their own cycles, while radio has hourly updates. Cable TV has changed the cycle of many TV […]
A typical menstrual cycle lasts 28 days, with a normal period lasting five days. Deviations from this range are considered abnormal, including irregular periods, cycles lasting less than 20 days or more than 35 days, heavy or light flow, and severe symptoms. It’s important to seek medical help if periods are less than two days […]
The menstrual cycle is controlled by five hormones: estrogen, progesterone, luteinizing hormone, follicle-stimulating hormone, and gonadotropin-releasing hormone. These hormones work together to cause ovulation and prepare the body for possible fertilization. The menstrual cycle has three phases: follicular, ovulatory, and luteal. Every woman’s body contains hundreds of different hormones, but there are some that work […]
Air cycle machines provide fresh, temperature-controlled oxygen to aircraft cabins without the use of harmful chemicals. They come in different types and sizes and are eco-friendly, reliable, and long-lasting. The process involves compressing and cooling air from the engines and using it to circulate cooled air through the cabin. An air cycle machine is the […]
Plastic bottles are a common product made from petroleum or bioplastics. The oil must be extracted and sent to a processing plant before being distilled to create plastic pellets. These pellets are melted into preforms and then heated to create the final bottle. After use, plastic bottles can be reused, recycled, or thrown away. However, […]
The Brayton cycle is a thermodynamic cycle used in gas turbine engines and other turbine engines. It was developed by American engineer George Brayton in the 1870s and is used for electrical power generation and jet aircraft propulsion. The original engine consisted of a gas compressor, mixing chamber, and expander, while modern gas turbine engines […]
Cycle billing involves updating customer balances on a daily basis and issuing a single invoice at the end of a billing period. It is used by utility and telecommunications companies and offers benefits for both suppliers and customers, including time and cost savings. Cycle billing is typically used for ongoing customer-supplier relationships and cannot be […]
The Carnot cycle determines the maximum possible efficiency for a heat engine between two temperatures. It is theoretical and cannot operate in physical systems, but establishes maximum efficiency for other engines. The cycle includes four processes and assumes no change in entropy. Efficiency can be calculated using the maximum and minimum temperatures. The Carnot thermal […]
The Otto cycle is a four-stroke internal combustion engine used in most cars, invented by Nikolaus Otto. It involves four stages: intake, compression, ignition, and exhaust. Diesel cycles are similar but use compression instead of spark to create power. Otto cycle and Otto engine are common terms used interchangeably to represent a four-stroke internal combustion […]
Life cycle cost analysis considers all costs of ownership, from acquisition to disposal, for informed decision making. It can be used for large purchases, repairs, and pricing decisions. It also includes environmental costs and can be performed for real estate using computer programs. Life cycle cost analysis is an approach to asset valuation that involves […]
Business cycle analysis involves reviewing the stages of the economy, historical trends, and leading or lagging indicators to understand changes in the market. The four stages are boom, peak, bust, and trough, and economists use indicators to signal changes. Historical trends provide insight into why the cycle shifts, and companies should conduct frequent analysis. Business […]
Urea cycle disorders are rare genetic disorders that occur when one of the six enzymes involved in removing ammonia from the blood is depleted. Symptoms range from irritability to coma and death, and treatment involves protein restriction and medication to remove ammonia. Liver transplants can serve as a cure for some cases. A urea cycle […]
Monetary policy and the business cycle are two important aspects of a market economy that can have unintended negative effects. Governments can influence the business cycle through monetary policy, but loose policies can result in rampant inflation and a contraction in the economy. An economy is a vast conglomeration of individuals, companies, regulations, government policies […]
The creatine cycle is a process used by bodybuilders to prevent the body from getting used to the supplement and to continue muscle gains long term. It involves a loading phase, a maintenance phase, and a no creatine phase. Creatine is a supplement used to promote muscle growth and recovery after a workout. During the […]
Cytomel is a thyroid hormone used to treat thyroid deficiency, obesity, and fatigue. It increases metabolism and is used by bodybuilders to lose excess body fat. A cycle should not exceed six weeks and should be tapered to avoid negative side effects. Women are more susceptible to side effects. It should only be used with […]
The knowledge management cycle involves capturing, processing, and distributing knowledge within an organization, including from external sources. Proper archiving and designated personnel are important for effective knowledge capture, while a knowledge manager can direct relevant information to where it is needed. Feedback updates and refreshes the knowledge file. The knowledge management cycle describes the way […]
Loop gain is the gain in a parameter when a portion of the output is fed back as input. Negative and positive loop gain systems are used in control techniques for various systems. A combined feedback/feed-forward control system is used to maintain a constant output value. Open-loop gain does not use process information to control […]
Life cycle analysis evaluates a product or service’s impact on the environment, with four phases: focus and scope, inventory, impact assessment, and interpretation. It helps companies choose the least harmful course of action, but unforeseen consequences can arise. A life cycle analysis, also known as a life cycle assessment, evaluates how a given product or […]
