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Angular Momentum: Single Particle01:10

Angular Momentum: Single Particle

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Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm...
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Principle of Linear Impulse and Momentum for a Single Particle01:20

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Linear momentum is a fundamental concept in physics that describes the motion of an object. It is a vector quantity, having a magnitude equal to the product of its mass and its velocity, and direction along the object's velocity. On the other hand, linear impulse, also known as momentum impulse, is a concept in physics related to the change in the linear momentum of an object. Impulse is a vector quantity defined as the product of force and the time over which the force is applied.
Delving...
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Electron Microscope Tomography and Single-particle Reconstruction01:07

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
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Electron tomography can be performed either in TEM or STEM (scanning transmission...
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Antibiotic Selection00:57

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Machines01:19

Machines

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Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. One example of a machine is the cutting plier, which is used to cut wires by applying forces to its handles. When equal and opposite forces are exerted on the handles of the cutting plier, they cause the cutting edges to come together and apply equal and opposite reaction forces on the wire, which are greater than the applied forces.
A free-body diagram of the...
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Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving01:23

Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving

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Consider a wooden box and a cylinder of known masses m1 and m2, respectively,  hanging from a ceiling with the help of a massless pulley system.
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Video Experimental Relacionado

Updated: Jan 31, 2026

A Protocol for Real-time 3D Single Particle Tracking
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A Protocol for Real-time 3D Single Particle Tracking

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Selección de características y optimización de hiperparámetros para la clasificación mediante aprendizaje automático

Jagriti Chatterjee1,2, Subhojyoti Chatterjee1,2, Emil Gillett1,2

  • 1Department of Chemistry, University of Illinois at UrbanaChampaign, Urbana, Illinois 61801, United States.

Chemical & biomedical imaging
|January 30, 2026
PubMed
Resumen
Este resumen es generado por máquina.

El aprendizaje automático caracteriza con precisión los patrones de difusión complejos en entornos abarrotados. Este enfoque mejora la comprensión del movimiento de las partículas en sistemas biológicos y de materiales.

Palabras clave:
difusiónselección de característicasoptimización de hiperparámetrosaprendizaje automáticodinámica de partículas individuales

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