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Related Concept Videos

Conservation of Momentum: Introduction01:16

Conservation of Momentum: Introduction

The total momentum of a system consisting of N interacting objects is constant in time or is conserved. A system must meet two requirements for its momentum to be conserved:
Conservation of Linear Momentum for a System of Particles01:28

Conservation of Linear Momentum for a System of Particles

In the dynamic realm of billiards, a fascinating interplay of forces governs the motion of cue balls and stationary balls. When the cue ball collides with a stationary ball, linear momentum is exchanged. The cue ball imparts a fraction of its linear momentum to the stationary ball, causing the cue ball to decelerate while initiating the motion of the stationary ball.
The impulsive force at play during this interaction is of extremely short duration, rendering its impulse negligible. When...
Motion of a Projectile01:23

Motion of a Projectile

Projectile motion becomes evident when a player kicks the ball into the air. The launch angle, or the angle at which the ball is kicked, plays a crucial role in determining the trajectory of the projectile. As the ball soars through the air, influenced solely by gravity, its motion can be dissected into two independent velocity components: the horizontal and the vertical.
Horizontal motion, governed by the initial kick, maintains a constant velocity throughout the flight of the soccer ball.
BIBO stability of continuous and discrete -time systems01:24

BIBO stability of continuous and discrete -time systems

System stability is a fundamental concept in signal processing, often assessed using convolution. For a system to be considered bounded-input bounded-output (BIBO) stable, any bounded input signal must produce a bounded output signal. A bounded input signal is one where the modulus does not exceed a certain constant at any point in time.
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system.
Conservation of Mass in Moving, Nondeforming Control Volume01:14

Conservation of Mass in Moving, Nondeforming Control Volume

Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
Conservation of Energy in Control Volume01:14

Conservation of Energy in Control Volume

Consider a turbine operating under steady-flow conditions. The control volume is drawn around the turbine, with fluid entering at one point and exiting at another. The turbine extracts energy from the fluid, which performs mechanical work (shaft work).
For steady flow systems, the time derivative of the stored energy becomes zero since there is no energy accumulation within the control volume. This simplifies the energy equation to:

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Keeping the ball in bounds.

John Carroll

    Biotechnology Healthcare
    |February 21, 2013
    PubMed
    Summary
    This summary is machine-generated.

    Biotech companies face scrutiny over off-label drug promotion despite potential patient benefits. Government regulations and Centers for Medicare & Medicaid Services (CMS) policy create a complex environment for drug marketing and research.

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    Area of Science:

    • Pharmaceuticals
    • Regulatory Affairs
    • Health Economics

    Background:

    • The 'one drug, many uses' concept can increase drug sales and offer hope to patients seeking alternative treatments.
    • Off-label drug promotion by pharmaceutical companies is under strict government regulation.
    • Centers for Medicare & Medicaid Services (CMS) policy may inadvertently encourage scientific investigation into unapproved drug applications.

    Purpose of the Study:

    • To analyze the impact of regulatory actions on the promotion of off-label drug uses.
    • To examine the interplay between government enforcement and CMS policies regarding pharmaceutical marketing.
    • To understand the evolving landscape for biotech companies navigating off-label promotion.

    Main Methods:

    • Review of government enforcement actions related to off-label promotion.
    • Analysis of current CMS policies and their implications for drug research.
    • Case studies of biotech companies' strategies in response to regulatory pressures.

    Main Results:

    • Increased caution among biotech firms regarding off-label promotion due to regulatory crackdowns.
    • Apparent contradiction between strict promotion regulations and CMS policies favoring research into off-label uses.
    • Biotech companies are actively monitoring regulatory guidance and adapting their commercial strategies.

    Conclusions:

    • The pharmaceutical industry operates in a complex regulatory environment concerning off-label drug promotion.
    • CMS policies may create opportunities for legitimate scientific exploration of off-label drug applications.
    • Biotech companies must balance commercial interests with strict adherence to promotional regulations.