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Related Concept Videos

Physical Assessment of the Respiratory Tract III: Percussion01:29

Physical Assessment of the Respiratory Tract III: Percussion

The respiratory system, fundamental to life, consists of complex structures responsible for gas exchange. The percussion assessment is critical to understanding this system's health and functionality. This non-invasive assessment technique allows healthcare providers to evaluate the density or aeration of the lungs, thereby identifying potential abnormalities.
Percussion in Respiratory Assessment
Percussion evaluates underlying tissue composition with audible and tactile vibrations,...
Speed of Sound in Gases01:08

Speed of Sound in Gases

The speed of sound in a gaseous medium depends on various factors. Since gases constitute molecules that are free to move, they are highly compressible. Hence, sound waves travel slowly through gases. Thermodynamics helps us understand the relationship between pressure, volume, and temperature of gases, thus, the speed of sound in an ideal gas can be determined using the laws of thermodynamics. At the same time, Newton's laws of motion and the continuity equation of fluid dynamics also come in...
Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Respiratory System Abnormal Finding I: Inspection and Percussion01:30

Respiratory System Abnormal Finding I: Inspection and Percussion

Respiratory system abnormalities are a significant concern in healthcare due to their potential to indicate underlying severe conditions like Chronic Obstructive Pulmonary Disease (COPD), asthma, and pneumonia. These abnormalities can often be detected through physical examination methods like inspection and percussion.
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...
Respiratory System Abnormal Finding II: Palpation and Auscultation01:31

Respiratory System Abnormal Finding II: Palpation and Auscultation

In assessing respiratory abnormalities, palpation and auscultation are critical tools for detecting and interpreting various pathophysiological changes. These techniques provide insight into underlying disorders by evaluating tactile sensations and sounds produced by the respiratory system.
Palpation Findings
During a respiratory assessment, palpation can reveal several vital abnormalities:
Physical Assessment of the Respiratory Tract IV: Auscultation01:28

Physical Assessment of the Respiratory Tract IV: Auscultation

Auscultation is a crucial component of the physical assessment of the respiratory tract. It offers valuable insights into airflow through the bronchial tree and potential lung obstructions. This process involves careful listening to breath, voice, and adventitious sounds, which can reveal a wealth of information about a patient's respiratory health.
Breath Sounds
Breath sounds are categorized into vesicular, bronchovesicular, and bronchial.

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Related Experiment Video

Updated: Jun 12, 2026

Design and Use of a Full Flow Sampling System (FFS) for the Quantification of Methane Emissions
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Published on: June 12, 2016

Noise performance of InAs/GaSb/AlSb/GaSb SWIR FPA.

Ruoyu Xie, Shan Yifan, Lingze Yao

    Optics Express
    |June 11, 2026
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a short-wave infrared focal plane array using M-type superlattices. Three-dimensional noise analysis revealed temporal column noise limits performance, not dark current, guiding future SWIR FPA optimization.

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    Published on: July 19, 2018

    Area of Science:

    • Materials Science
    • Optoelectronics
    • Semiconductor Devices

    Background:

    • Short-wave infrared (SWIR) focal plane arrays (FPAs) are crucial for various imaging applications.
    • Understanding and mitigating noise is essential for optimizing SWIR FPA performance.
    • M-type superlattices offer potential for advanced SWIR detector fabrication.

    Purpose of the Study:

    • To fabricate and characterize an M-type superlattice-based SWIR FPA.
    • To apply and summarize three-dimensional (3D) noise analysis techniques for SWIR devices.
    • To identify dominant noise sources and limitations in the SWIR FPA.

    Main Methods:

    • Fabrication of an M-type superlattice SWIR FPA.
    • Characterization of optoelectronic properties.
    • Application of 3D noise analysis, including linearity fitting, two-point calibration, and noise source decomposition.

    Main Results:

    • The SWIR FPA exhibited measurable optoelectronic properties.
    • Temporal column noise was identified as the primary contributor to the overall noise budget.
    • The detection capability of the FPA was found to be limited by the readout circuit, not dark current.

    Conclusions:

    • The study successfully applied 3D noise analysis to an M-type superlattice SWIR FPA.
    • Temporal column noise is a critical factor affecting SWIR FPA performance.
    • The findings provide a framework for noise localization and performance enhancement in SWIR FPAs for engineering applications.