Imaginary Part

The imaginary part of a complex number is the real coefficient that multiplies the imaginary unit i, where i² = −1; it records a number’s position along the vertical axis of the complex plane. For z = a + bi, the imaginary part is Im(z) = b, obtained by expressing z in standard Cartesian form, while the real part is a. This component supports complex arithmetic, conjugation, and geometric interpretation, and it is essential in mathematics and applied fields for representing rotations, oscillations, wave behavior, and solutions to equations that have no real roots.

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Research

JoVE EoE - Neuropathology

Modeling Repetitive Concussive Head Injuries in a Mouse Model

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2025

Source: Yang, Z., et.al. A Repetitive Concussive Head Injury Model in Mice. J. Vis. Exp. (2016).This video demonstrates the induction of repetitive concussive head injuries in a mouse using an electromagnetic impact device. The procedure involves positioning the impact tip between the interfrontal and lambdoid sutures on the skull of an anesthetized mouse and using a probe tip to precisely set the impact depth. The impact is delivered at a controlled velocity and depth to simulate mild...

A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures

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Cited by 33 •

2014

The present work provides a comprehensive set of guidelines for manually tracing the medial temporal lobe (MTL) structures. This protocol can be applied to research involving structural and/or combined structural-functional magnetic resonance imaging (MRI) investigations of the MTL, in both healthy and clinical groups.

Education

JoVE Science Education - Engineering

Electrochemical Impedance Spectroscopy

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2023

Source: Kara Ingraham, Jared McCutchen, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Electrical resistance is the ability of an electrical circuit element to resist the flow of electricity. Resistance is defined by Ohm's Law: (Equation 1) Where is the voltage and is the current. Ohm's law is useful for determining the resistance of ideal resistors. However, many circuit elements are more complex and can't be described by...

Hypoxia Alters miRNAs Levels Involved in Non-Mendelian Inheritance of Autism Spectrum Disorder in Mice

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Cited by 1 •

2025

Here, we present a protocol to induce hypoxia in neonatal mice by delivering them in controlled environments with varying oxygen concentrations. Mouse models subjected to oxygen variations at birth have durably varied the expression of miRNAs involved in the induction of behavioral phenotypic changes such as autism.

A Repetitive Concussive Head Injury Model in Mice

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Cited by 5 •

2016

Concussion presents the most common type of traumatic brain injury. Therefore, a repetitive concussive animal model, which replicates the important features of an injury in patients, may provide a means to study concussion in a rigorous, controlled, and efficient manner.

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