Search research articles

ACERCA DE JoVE

Visión General Liderazgo Blog Centro de Ayuda JoVE

AUTORES

Proceso de Publicación Consejo Editorial Alcance y Políticas Revisión por Pares Preguntas Frecuentes Enviar

BIBLIOTECARIOS

Testimonios Suscripciones Acceso Recursos Consejo Asesor de Bibliotecas Preguntas Frecuentes

INVESTIGACIÓN

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archivo

EDUCACIÓN

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Centro de Recursos para Profesores Sitio de Profesores

Términos y Condiciones de Uso

Política de Privacidad

Videos de Conceptos Relacionados

Motion Of A Charged Particle In A Magnetic Field

Motion Of A Charged Particle In A Magnetic Field

A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...

Relative Motion Analysis - Velocity

Relative Motion Analysis - Velocity

A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...

Relative Velocity in One Dimension

Relative Velocity in One Dimension

The understanding of the concept of reference frames is essential to discuss relative motion in one or more dimensions. When we say that an object has a certain velocity, we must state the velocity with respect to a given reference frame. In most examples, this reference frame has been Earth. For instance, if a statement reads that a person is sitting in a train moving at 10 m/s east, then it implies that the person on the train is moving relative to the surface of Earth at this velocity,...

Simplified Synchronous Machine Model

Simplified Synchronous Machine Model

The Synchronous Machine Model is a fundamental tool in analyzing and ensuring the transient stability of power systems. This model simplifies the representation of a synchronous machine under balanced three-phase positive-sequence conditions, assuming constant excitation and ignoring losses and saturation. The model is pivotal for understanding the behavior of synchronous generators connected to a power grid, particularly during transient events.
In this model, each generator is connected to a...

Relative Velocity in Two Dimensions

Relative Velocity in Two Dimensions

Relative velocity is the velocity of an object as observed from a particular reference frame, or the velocity of one reference frame with respect to another reference frame. The concept of relative velocity can be used to describe motion in two dimensions. Consider a particle P and two reference frames S and S′. The position of the origin of S′ as measured in S is , the position of P as measured in S′ is , and the position of P as measured in S is , which can be evaluated by...

Steady, Laminar Flow Between Parallel Plates

Steady, Laminar Flow Between Parallel Plates

Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por

Same author

Comparison of nanopore sequencing, MethylationEPIC array, and EM-Seq for DNA methylation detection.

Computational biology and chemistry·2026

Same author

Postoperative anlotinib plus radiotherapy in patients with newly diagnosed, unmethylated O<sup>6</sup>-methylguanine-DNA methyltransferase glioblastoma: A single-arm, phase 2 study.

Cancer·2026

Same author

Placental toxic metal concentrations and preterm birth: Modification by social stressors.

Reproductive toxicology (Elmsford, N.Y.)·2026

Same author

Proton therapy treatment planning via the alternating direction method of multipliers: a tutorial review.

Biomedical physics & engineering express·2026

Same author

Fabrication of RADA32/Ngf_EE/MSCs composite hydrogel and its protective mechanism against radiation-induced ototoxicity.

iScience·2026

Same author

Complete response of a giant metastatic neck mass in tonsillar squamous cell carcinoma achieved with radiotherapy combined with immunotherapy: a case report.

Frontiers in oncology·2026

Search research articles

Video Experimental Relacionado

Updated: Sep 9, 2025

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Published on: February 6, 2019

Algoritmo de programación de velocidad bidireccional basado en escaneo para pórtico de arco de protones con tirón

Shiyi Zhou¹, Qingkun Fan¹, Yujia Qian²

¹School of Mathematics and Statistics, Wuhan University, No. 299, Bayi Road, Wuchang District, Wuhan, Hubei, 430072, CHINA.

Physics in medicine and biology

|September 2, 2025

Resumen

Un nuevo algoritmo de programación de velocidad de pórtico basado en escaneo bidireccional (BDS) mejora la eficiencia de la administración de terapia de arco de protones de escaneo puntual. Este método reduce el tiempo de tratamiento y mejora la suavidad de la velocidad del pórtico para mejores planes de SPArc.

Palabras clave:

Escaneo bidireccional Programación de la velocidad del pórtico Terapia de protones modulada en intensidad

Más Videos Relacionados

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

Videos de Experimentos Relacionados

Last Updated: Sep 9, 2025

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Published on: February 6, 2019

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

Área de la Ciencia:

Física médica
Radiología Oncológica
Tratamiento del cáncer

Sus antecedentes:

La terapia de arco protónico de exploración puntual (SPArc) ofrece una distribución de dosis conforme, pero requiere una administración eficiente.
La programación de la velocidad del pórtico es fundamental para optimizar la entrega del tratamiento SPArc y garantizar una rotación suave del pórtico.
Los métodos actuales pueden no satisfacer completamente las demandas mecánicas y clínicas de SPArc.

Objetivo del estudio:

Introducir y evaluar un nuevo algoritmo de programación de velocidad de pórtico basado en escaneo bidireccional, BDS_SPArc.
Mejorar la eficiencia de la entrega y mejorar los perfiles de velocidad del pórtico para los planes SPArc.
Asegurar que la administración de SPArc cumpla con los requisitos mecánicos y clínicos.

Principales métodos:

El algoritmo BDS_SPArc determina las velocidades máximas factibles del pórtico para la irradiación y la conmutación de la capa de energía utilizando un escaneo bidireccional.
Genera perfiles de velocidad con una sacudida limitada para garantizar transiciones suaves entre ángulos de pórtico.
El rendimiento se evaluó con el modelo de secuencia de entrega SPArc (DSM< sub>SPArc) utilizando nueve casos clínicos.

Principales resultados:

BDS_SPArc redujo significativamente el tiempo de entrega dinámica promedio de 308,5 ± 10,0 s a 273,1 ± 18,5 s en comparación con DSM_SPArc.
El tiempo perdido se redujo de 48, 1 ± 10, 0 s a 12, 6 ± 3, 1 s, lo que indica una mejora de la eficiencia.
El algoritmo generó perfiles de velocidad de pórtico más suaves.

Conclusiones:

BDS_SPArc es un nuevo algoritmo eficaz para la administración del tratamiento SPArc.
Se puede demostrar que mejora la eficiencia de la entrega y optimiza los perfiles de velocidad del pórtico.
BDS_SPArc representa un avance práctico para la planificación y la implementación clínica de SPArc.