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Related Concept Videos

Impulse01:13

Impulse

21.7K
According to Newton’s second law of motion, the rate of change of the momentum of an object is the net external force acting on it. The total change in momentum between two timepoints thus depends on both the external force acting on it and the time over which it acts. Describing this mathematically, the total change of an object’s motion is proportional to the force vector and the time over which it is applied. This product is called impulse.
Additionally, it can be shown that the...
21.7K
Impulse Response01:17

Impulse Response

763
The impulse response is the system's reaction to an input impulse. In an RC circuit, the voltage source is the input, and the capacitor's voltage is the output. The system's state and output response before and after input excitation are distinctly defined.
Kirchhoff's law forms an input signal equation, with the capacitor's current and voltage providing the output. Substituting the current and dividing by RC yields a differential equation. The output for an impulse input is the impulse...
763
Principle of Impulse and Moment01:15

Principle of Impulse and Moment

526
When one considers a rigid body undergoing a plane motion, which is essentially a blend of translational and rotational movement, the application of Newton's second law gives the formula for the translational movement of such a body. If this equation is multiplied by a time interval, dt, and then integrated over the limits of integration, it results in an equation that embodies the principle of linear impulse.
526
Impulse-Momentum Theorem00:49

Impulse-Momentum Theorem

19.4K
The total change in the motion of an object is proportional to the total force vector acting on it and the time over which it acts. This product is called impulse, a vector quantity with the same direction as the total force acting on the object.
By writing Newton's second law of motion in terms of the momentum of an object and the external force acting on it, and simultaneously using the definition of the impulse vector, it can be shown that the total impulse on an object is equal to its...
19.4K
Oxidation of Alcohols02:37

Oxidation of Alcohols

16.2K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
16.2K
Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis02:29

Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis

12.9K
Overview
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
12.9K

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A Microfluidic Device for Studying Multiple Distinct Strains
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Impulsivity and Alcohol Involvement: Multiple, Distinct Constructs and Processes.

Andrew K Littlefield1, Angela K Stevens1, Kenneth J Sher2

  • 1Department of Psychology, Texas Tech University, Psychology Building, Box 42051, Lubbock, TX 79409, USA.

Current Addiction Reports
|July 3, 2018
PubMed
Summary
This summary is machine-generated.

Impulsivity traits strongly link to alcohol use and problems. Newer research shows specific impulsivity types affect distinct alcohol behaviors, with dynamic relationships over time.

Keywords:
Alcohol involvementAlcohol use disordersBehavioral undercontrolImpulsivityPersonalityUPPS-PUrgency

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Area of Science:

  • Psychology
  • Addiction Research
  • Behavioral Science

Background:

  • Problematic alcohol involvement is linked to various personality traits.
  • Impulsivity traits demonstrate the strongest association with alcohol use and related problems.

Purpose of the Study:

  • To review research on impulsivity traits and problematic alcohol involvement.
  • To examine theoretical models explaining the link between impulsivity and alcohol use.
  • To highlight limitations and future research directions.

Main Methods:

  • Review of seminal and recent empirical studies.
  • Focus on self-report measures of impulsivity-related traits.
  • Analysis of theoretical models and empirical support.

Main Results:

  • Broad and specific impulsivity measures relate to alcohol involvement.
  • Specific impulsivity constructs are linked to distinct alcohol behaviors.
  • Emerging evidence suggests a dynamic, time-varying relationship between impulsivity and alcohol use.

Conclusions:

  • Impulsivity is a key factor in understanding problematic alcohol involvement.
  • Further research is needed to clarify the dynamic interplay between impulsivity and alcohol use across development.