ANAs can be found in approximately 5% of the normal population, usually in low titers (low levels). These people usually have no disease. Titers of 1:80 or lower are less likely to be significant. (ANA titers of less than or equal to 1:40 are considered negative.) What is considered positiveRead More →

When this line crosses the t-axis, the object has (momentarily) stopped, and is in the process of changing direction. Negative velocity must mean movement in the opposite direction. Why can position be negative? Displacement can be negative because it defines a change in position of an object while carefully monitoringRead More →

Easy-going is a desirable quality as well: Easy-going partners will adjust to your needs, let you make decisions, and be happy with what they have. How do you say you’re going easy? Easygoing synonyms carefree. Free from troubles or worry. … laid-back. The definition of laid back is someone orRead More →

The BIC values are always negative, e.g. . In the documentation of the method bic() , it says “The lower the better”. What does it mean if your AIC is negative? Further more it is only meaningful to look at AIC when comparing models! But to answer your question, theRead More →

When you design a controller using PID Tuner, the resulting derivative gain, D, can have a different sign from the integral gain I. PID Tuner always returns a stable controller, even if one or more gains are negative. … Therefore, as long as DN > –1, a negative D stillRead More →

characterized by or given to pretentious or conspicuous show in an attempt to impress others: an ostentatious dresser. (of actions, manner, qualities exhibited, etc.) intended to attract notice: Lady Bountiful’s ostentatious charity. What is the difference between something ostentatious and something pretentious? Ostentatious means attracting attention or “showy”. An ostentatiousRead More →

: affected by strong feelings of shock and dismay … the Allied commanders were appalled to learn that 300 glider troops had drowned at sea.— Kathleen McAuliffe I was amazed, impressed, appalled, touched, embarrassed. Can a person be rancorous? A rancorous argument or person is full of bitterness and anger.Read More →

Example of negative oil prices Oil futures have only turned negative once in history, which happened to WTI futures expiring in May 2020. The price went negative on 20 April 2020, a day ahead of the May 2020 delivery (21 April 2020). Why did WTI go negative? The crash inRead More →