The Epworth Sleepiness Scale is a test used to measure daytime sleepiness and evaluate people with sleep disorders. Patients answer a series of self-reported questions, with scores of 10 or higher indicating excessive daytime sleepiness. The test was devised by Dr. Murray Johns in the 1990s and is used worldwide in clinical settings. It provides […]
The Fujita scale rates tornado intensity based on damage caused. The Enhanced Fujita Scale replaced it in the US in 2007, taking build quality into consideration. Both are damage scales that estimate wind speed. Past tornadoes will not be re-rated using the new scale. The Fujita scale (F-Scale), also known as the Fujita-Pearson scale, is […]
The Beaufort wind force scale was created in the early 19th century for mariners and later expanded for land use. It has 12 grades, ranging from still air to hurricane-force winds, and became popular with the invention of the telegraph and cup anemometer. The scale became the mandatory standard for measuring wind speed in the […]
Behavioral observation measures employee behavior and worth when productivity alone cannot be evaluated. A scale rates behavior and actions, and can be used for comparison and disciplinary action. Clerical workers often need to be ranked on this scale. A questionnaire is used to gather data, and employers may use it to evaluate new employees in […]
The Celsius temperature scale was invented by Anders Celsius in 1742, with 0 as the boiling point and 100 as the freezing point. The modern scale has reversed these values and is easier to calculate than Fahrenheit. Most countries use Celsius, while scientists use a combination of Celsius and Kelvin. In the US, Fahrenheit is […]
Magnitude scales are used to measure the strength of earthquakes and the brightness of stars. The astronomical magnitude scale measures the amount of light emitted by stars, with higher numbers indicating fainter stars. The Richter scale measures the energy released by an earthquake, with each unit representing ten times more energy. The moment magnitude scale […]
The Mohs scale, created by Friedrich Mohs in 1812, measures the hardness of minerals by their ability to scratch or be scratched. The traditional scale rates hardness up to 10, with diamond being the hardest, but a revised scale rates up to 15. The scale is relative and not exact, with each number not being […]
The Brix scale measures the concentration and density of sugar solutions, commonly used in wine, beer, soda, and food production. Developed by Adolf Brix in the mid-1800s, it is expressed metrically and used to maintain consistency and experiment with new flavors. It is also important for fruit juice, honey, and fountain beverage production, where it […]
The Perceived Stress Scale is a psychological test that measures an individual’s perception of stress in their life. It has three versions, with the 10-question version being the most reliable. The questions are easy to understand and do not address specific events or stress triggers. The score is calculated by assigning numerical values to each […]
The SAD PERSONS scale assesses the risk of suicide in patients, with each risk factor represented by a letter in the mnemonic. The scale is used for both adults and children, and a higher score indicates a higher risk of suicide. Medical students who used the scale showed an increased ability to determine patients’ risk […]
Economies of scale refer to cost savings per unit manufactured as production increases. This can be achieved through bulk purchasing of raw materials, strategic location of facilities, and spreading fixed costs over a greater number of units. Diseconomies of scale occur when negative factors impact the benefits of economies of scale. Finding the right balance […]
Spring balances measure weight by the deflection of a spring, but can be inaccurate and wear out over time. Force gauges use the extension of a spring to determine force. Spring scales must be calibrated and checked regularly. They are used in supermarkets and portable versions are available for field work and education. A spring […]
The Childhood Autism Rating Scale assesses autism in children aged two and older by evaluating 15 aspects of behavior. Scores above 30 indicate autism, with higher scores indicating more severe cases. The test should be administered by a trained professional. The Childhood Autism Rating Scale is a scale that is used to assess the presence […]
The Beck Hopelessness Scale is a questionnaire that evaluates a patient’s risk of suicide by asking them to classify 20 statements as true or false. A higher score indicates a higher risk of suicide, with four possible outcomes. The scale has proven to be highly accurate for high-risk patients and drug users. The Beck Hopelessness […]
Mobile escalator fares change prices based on a buyer’s ability to pay, commonly used by non-profit organizations and government services. Professionals may also use it for commercial or altruistic reasons. However, it can be limited by the potential for abuse and the cost of retrieving necessary information. It is found more frequently in continuous relationships […]
