Mode Cleaner Cavity

A mode cleaner cavity is an optical resonator that filters a laser beam’s spatial and frequency content, producing a stable, predominantly fundamental transverse mode for precision optical measurements. Light enters a resonant cavity formed by mirrors; the cavity geometry and length determine which modes satisfy the resonance condition, while higher-order transverse modes are suppressed when they are not resonant. Active length stabilization can maintain resonance despite environmental disturbances such as vibration or thermal drift. In physics experiments, mode cleaner cavities improve beam quality and pointing stability, supporting sensitive interferometry, optical frequency control, and gravitational-wave detectors.

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Education

JoVE Core - Anatomy and Physiology

Oral Cavity

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2024

The oral cavity, or the mouth, is a complex structure in humans that plays a vital role in our day-to-day lives. Its role is not only in chewing and swallowing food; it also plays a role in speech and facial expressions. Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...

What is a Mode?

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2023

The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set. There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times. A data set with two modes is called bimodal. For example,...

Research

JoVE Journal - Immunology and Infection
Free Sample

Isolation of Mouse Peritoneal Cavity Cells

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Cited by 445 •

2010

The peritoneal cavity in mammals contains different immune cell populations crucial for innate immune responses. An efficient isolation method is required for biochemical and functional analyses of these cells. Here we provide a comprehensive method for the isolation of peritoneal cavity cells in the mouse.

Nose and Nasal Cavity

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2025

The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...

Ventilatory Modes

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2025

Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure. There are three ventilatory modes: full support, partial support, and spontaneous. These are described below. Full Support Modes Full support modes include controlled mechanical ventilation, continuous mandatory...

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