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Videos de Conceptos Relacionados

Encoding01:19

Encoding

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Information enters the brain through encoding, which is the input of information into the memory system. Once sensory information is received from the environment, the brain labels or codes it. The information is then organized with similar information and connected to existing concepts. Encoding occurs through automatic processing and effortful processing.
Automatic processing involves the encoding of details like time, space, frequency, and the meaning of words, usually done without conscious...
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Theoretical Approaches to Psychological Disorder01:29

Theoretical Approaches to Psychological Disorder

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The development of psychological disorders, which are characterized by deviant, maladaptive, and personally distressing behaviors, has been explored through several theoretical approaches.
Biological approach
The biological approach posits that internal, organic factors are the primary causes of such disorders. This perspective emphasizes brain structure and function, genetic predispositions, and neurotransmitter imbalances. For example, schizophrenia has been associated with both genetic...
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Theories play an essential role in organizing patient care. Theories refer to a proposed or followed belief, policy, or procedure that is the basis for action. Nursing theories are knowledge-based concepts that guide nurses' actions, influence nursing education and practice, and allow nurses to care for their patients.
Theories provide a perspective to assess patients' conditions and organize data and methods. They also assist in analyzing and interpreting information. They represent a...
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Ionic Crystal Structures02:42

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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Crystal Growth: Principles of Crystallization01:25

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Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
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Video Experimental Relacionado

Updated: Feb 15, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Estrategia teórica para lógica temporal y función de codificación basada en cristales de tiempo fotónicos

Shuo Xu, Hai-Feng Zhang

    Optics letters
    |February 13, 2026
    PubMed
    Resumen

    Este estudio presenta cristales de tiempo fotónicos anisotrópicos (APTC) para crear un codificador binario de 2 bits y puertas lógicas. Este novedoso dispositivo fotónico permite el cifrado de información eficiente y el procesamiento paralelo para futuras aplicaciones de computación óptica.

    Palabras clave:
    cristales de tiempo fotónicos anisotrópicoslógica fotónicacodificador binariocifrado de fasecomputación óptica

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    Área de la Ciencia:

    • Fotónica
    • Computación Óptica
    • Ciencia de Materiales

    Sus antecedentes:

    • Los cristales de tiempo fotónicos anisotrópicos (APTC) ofrecen propiedades únicas de manipulación de la luz.
    • La implementación de operaciones lógicas y codificación en sistemas fotónicos es crucial para la computación avanzada.

    Objetivo del estudio:

    • Proponer y demostrar una configuración novedosa que utiliza APTC para un codificador binario de 2 bits y funciones lógicas.
    • Explorar el potencial de los APTC en sistemas de cifrado de fase.

    Principales métodos:

    • Explotación del efecto de amplificación de ondas sensible al ángulo en APTC para crear una ventana de magnificación angular (AMW) sintonizable.
    • Configuración de funciones lógicas NOR y AND y un codificador binario de 2 bits controlando los cambios de transmitancia.
    • Simulaciones numéricas utilizando el método de la matriz de transferencia y el método del dominio de tiempo de diferencia finita (FDTD) para verificación.

    Principales resultados:

    • Se demostró una AMW sintonizable en el dominio angular ajustando los parámetros de APTC.
    • Se implementaron con éxito las funciones lógicas NOR y AND y un codificador binario de 2 bits.
    • Se construyó un sistema de cifrado de fase basado en el codificador APTC y el dispositivo lógico.

    Conclusiones:

    • Los APTC proporcionan una plataforma viable para la implementación paralela de estructuras de codificación y diseño lógico.
    • El enfoque propuesto allana el camino para dispositivos lógicos fotónicos avanzados y tecnologías de cifrado de información.