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Masking and Demasking Agents01:19

Masking and Demasking Agents

3.6K
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
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Administering Oxygen by Mask01:30

Administering Oxygen by Mask

2.3K
Administering Oxygen by Mask
Administering oxygen by mask is a common nursing intervention that provides supplemental oxygen to patients with respiratory distress or chronic lung conditions. This procedure involves delivering oxygen at a specified rate through a face mask connected to an oxygen source.
Equipment
The equipment necessary for this procedure includes:
2.3K
Classification of Titrimetric Analysis Based on Reaction Types01:01

Classification of Titrimetric Analysis Based on Reaction Types

1.7K
Titrimetric analysis in solution chemistry involves measuring the volume of solutions and is often called volumetric analysis. The standard solution of known concentration in the burette is called the titrant, whereas the solution of unknown concentration in the flask is called the analyte, or titrand. Titrimetric analyses can be classified into four types based on the reactions between the titrant and analyte.
Titrations between an acid and a base lead to neutralization reactions that form...
1.7K
Cardiovascular Drugs: Classification based on Therapeutic Indications01:18

Cardiovascular Drugs: Classification based on Therapeutic Indications

4.2K
Cardiovascular diseases, encompassing a range of conditions, can significantly affect the heart's operations and the overall circulatory system. These conditions impair the heart's ability to pump blood, leading to a deficit in oxygen supply to crucial organs. Anomalies in the heart's electrical system, known as arrhythmias, can cause heartbeats to accelerate or slow down. Usually, heart rates increase during physical activity and decrease while resting or sleeping. However,...
4.2K
Oxygen Delivering System I: Nasal Cannula and Face Mask01:26

Oxygen Delivering System I: Nasal Cannula and Face Mask

1.6K
The human body requires oxygen to function, and when the natural process of respiration is hindered, external devices, including the following, are needed to help deliver this vital gas.
Nasal Cannula
A nasal cannula is a lightweight tube split at one end into two prongs and placed in the nostrils. It is typically used to deliver low to medium levels of oxygen.
Suggested flow rate: The suggested flow rate for a nasal cannula typically ranges between 1 and 6 L/min.
Oxygen percentage setting:...
1.6K
Force Classification01:22

Force Classification

2.4K
Forces play a crucial role in the study of physics and engineering. They are essential in describing the motion, behavior, and equilibrium of objects in the physical world. Forces can be classified based on their origin, type, and direction of action.
Contact and non-contact forces are two of the most widely used categories of forces. As the name suggests, contact forces require physical contact between two objects to act upon each other. Examples of contact forces include frictional,...
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Video Experimental Relacionado

Updated: Jan 29, 2026

A Tablet-Based Curriculum-Based Measurement Protocol for Kindergarten Writing
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Aprendizaje Profundo Eficiente con Autoencoders Enmascarados Basados en Currículo para Clasificación de OCT Retiniana

Taeyoung Yoon1, Daesung Kang1

  • 1School of Bio-Health Convergence, College of Natural Sciences, Sungshin Women's University, Seoul 01133, Republic of Korea.

Diagnostics (Basel, Switzerland)
|January 28, 2026
PubMed
Resumen
Este resumen es generado por máquina.

Un nuevo marco de autoaprendizaje supervisado basado en currículo (CurriMAE) mejora la clasificación de OCT retiniana al mejorar el aprendizaje de representaciones y reducir los costos computacionales. Este enfoque logra una alta precisión, superando los métodos estándar para diagnosticar diversas enfermedades oculares.

Palabras clave:
aprendizaje por currículoaprendizaje por conjuntosautoencoders enmascaradossopas de modelostomografía de coherencia ópticaaprendizaje autosupervisadoconjunto instantáneo

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Área de la Ciencia:

  • Análisis de Imagen Oftálmica
  • Clasificación de Imágenes Médicas
  • Aprendizaje Profundo en Oftalmología

Sus antecedentes:

  • La tomografía de coherencia óptica (OCT) retiniana es crucial para el diagnóstico de enfermedades oculares.
  • El desarrollo de clasificadores multiclase precisos para OCT se ve obstaculizado por la limitada cantidad de datos etiquetados y los altos costos computacionales del preentrenamiento autosupervisado.
  • Los métodos existentes luchan con la eficiencia y el rendimiento en tareas complejas de clasificación de OCT.

Objetivo del estudio:

  • Introducir un marco de autoaprendizaje supervisado basado en currículo (CurriMAE) para mejorar el aprendizaje de representaciones en la clasificación de OCT.
  • Reducir la carga computacional asociada con el preentrenamiento autosupervisado para el análisis de OCT.
  • Mejorar el rendimiento de los clasificadores multiclase para imágenes de OCT de retina.

Principales métodos:

  • Se desarrollaron dos estrategias de conjunto, CurriMAE-Soup y CurriMAE-Greedy, utilizando preentrenamiento progresivo de autoencoder enmascarado (MAE).
  • Se empleó una ejecución de preentrenamiento MAE guiada por currículo con proporciones de enmascaramiento progresivas, evitando entrenamientos repetidos.
  • Se evaluaron los métodos en los conjuntos de datos Kermany y OCTDL, comparándolos con MAE estándar y líneas de base supervisadas (ResNet-34, ViT-S).

Principales resultados:

  • Ambos métodos CurriMAE superaron significativamente a los métodos MAE estándar y a las líneas de base supervisadas en el conjunto de datos OCTDL (siete clases de retina).
  • CurriMAE-Greedy logró el mayor rendimiento: 0.995 AUC y 93.32% de precisión.
  • CurriMAE-Soup ofreció una precisión competitiva con una complejidad de inferencia sustancialmente menor y un almacenamiento de modelos reducido.

Conclusiones:

  • El marco de conjunto de autoaprendizaje supervisado propuesto basado en currículo (CurriMAE) es una solución eficaz y eficiente en cuanto a recursos para la clasificación multiclase de OCT retiniana.
  • Los métodos CurriMAE demuestran un alto rendimiento con costos computacionales reducidos a través de enmascaramiento progresivo y fusión de modelos.
  • Este marco muestra un potencial significativo para aplicaciones de imagenología oftalmológica en el mundo real con recursos computacionales y de datos limitados.