The term "impulse" is also used to refer to a fast-acting force or impact. This type of impulse is often idealized so that the change in momentum produced by the force happens with no change in time. This sort of change is a step change, and is not physically possible. However, this is a useful model for computing the effects of ideal collisions (such as in game physics engines). Additionally, in rocketry, the term "total impulse" is commonly used and is considered synonymous with the term "impulse".
The application of Newton's second law for variable mass allows impulse and momentum to be used as analysis tools for jet- or rocket-propelled vehicles. In the case of rockets, the impulse imparted can be normalized by unit of propellant expended, to create a performance parameter, specific impulse. This fact can be used to derive the Tsiolkovsky rocket equation, which relates the vehicle's propulsive change in velocity to the engine's specific impulse (or nozzle exhaust velocity) and the vehicle's propellant-mass ratio.
impulse
Results. When children were assessed within a week of a homicide that occurred near their home, they exhibited lower levels of attention and impulse control and lower preacademic skills. The analysis showed strong positive effects of local violence on parental distress, providing suggestive evidence that parental responses may be a likely pathway by which local violence affects young children.
According to well-cited research by social psychologist Wilhelm Hofmann, impulses emerge through the activation of the associative cluster in long-term memory in close interaction with perceptual stimulus input.
A key factor for driving impulse buys is physical stimuli. Consumer research has shown that external factors such as retail signage, ambiance, marketing activities, and window displays influence consumer behavior.
Point-of-purchase displays are another placement tactic retailers use to encourage impulse buyers. This way, shoppers can browse featured products while they wait in line and can add them to their cart at the last minute.
Research from Ridgeway, Kukar-Kinney, and Monroe found that impulse buyers seek novelty items and are hyperactive. These sensation seekers experience positive feelings when finding new stuff that leads them to buy products right away.
Another way to keep impulse prices down is to use your designated impulse purchase areas to display products that are on sale. Take Bath & Body Works, for example. It frequently offers discounted samplers of new fragrances and little add-ons right next to the cash registers. Combining sale prices with the urgency of a limited-time promotion is a recipe for impulse buying.
Free stuff is a powerful motivator. You can use that to your advantage by structuring conditional offers around your store. Low-cost products are often bought on impulse. So try to find products with higher margins in your offers to come out profitable.
For nearly 30 years, IML's research has focused on the development of novel manufacturing solutions using impulse-based processes. We discovered that materials can be shaped and joined in unique ways by moving metals at high speeds.
On May 3, 2016, FDA warned that compulsive or uncontrollable urges to gamble, binge eat, shop, and have sex have been reported with the use of the antipsychotic drug aripiprazole (Abilify, Abilify Maintena, Aristada, and generics). These uncontrollable urges were reported to have stopped when the medicine was discontinued or the dose was reduced. These impulse-control problems are rare, but they may result in harm to the patient and others if not recognized.
Although pathological gambling is listed as a reported side effect in the current aripiprazole drug labels, this description does not entirely reflect the nature of the impulse-control risk that we identified. Additionally, we have become aware of other compulsive behaviors associated with aripiprazole, such as compulsive eating, shopping, and sexual actions. These compulsive behaviors can affect anyone taking the medicine. We are adding new warnings about these compulsive behaviors to the drug labels and patient Medication Guides for aripiprazole products.
Health care professionals should inform patients and caregivers of the risk of these uncontrollable urges and ask patients about any new or increasing urges. Closely monitor for new or worsening uncontrollable urges in patients at higher risk. These include those with a personal or family history of obsessive-compulsive disorder, impulse-control disorder, bipolar disorder, impulsive personality, alcoholism, drug abuse, or other addictive behaviors. Consider reducing the dose or stopping the medicine if such urges develop.
A search of the FDA Adverse Event Reporting System (FAERS) database and the medical literature since the approval of Abilify in November 2002 identified 184 case reports in which there was an association between aripiprazole use and impulse-control problems. Pathological gambling was the most common (164 cases), but other compulsive behaviors including compulsive eating, spending or shopping, and sexual behaviors were also reported. FAERS includes only reports submitted to FDA. There may be additional cases about which we are unaware. Approximately 1.6 million patients received an aripiprazole prescription from U.S. outpatient retail pharmacies in 2015.
[h,t] = impz(b,a) returns the impulse response of the digital filter with numerator coefficients b and denominator coefficients a. The function chooses the number of samples and returns the response coefficients in h and the sample times in t. 2ff7e9595c
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