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Related Concept Videos

Graphs of Polar Equations01:17

Graphs of Polar Equations

456
The polar coordinate system represents points using a distance from a central point (the pole) and an angle from a reference direction (the polar axis). Unlike rectangular coordinates, polar coordinates are ideal for graphing curves with radial symmetry or periodic behavior.Some general forms of graphs in polar coordinates include the following:Equation of a Circle (Centered at the Pole):A graph where the radius remains constant for all angles traces a circle centered at the pole:Equation of a...
456
Polar Coordinates01:24

Polar Coordinates

635
The polar coordinate system offers an alternative to the Cartesian coordinate system for specifying points in a plane, using a distance and an angle instead of x and y coordinates. This system is particularly advantageous in situations involving circular or rotational symmetry, such as in physics or engineering problems involving waves, oscillations, or orbital paths.Defining Polar CoordinatesIn polar coordinates, a point is represented as P(r, ��), where r is the radial distance...
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Naturalistic Observations02:30

Naturalistic Observations

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If you want to understand how behavior occurs, one of the best ways to gain information is to simply observe the behavior in its natural context. However, people might change their behavior in unexpected ways if they know they are being observed. How do researchers obtain accurate information when people tend to hide their natural behavior? As an example, imagine that your professor asks everyone in your class to raise their hand if they always wash their hands after using the restroom. Chances...
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Global Climate Change01:50

Global Climate Change

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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Polar Equations of Conics01:29

Polar Equations of Conics

395
A conic section can be defined in polar coordinates as the set of all points whose distance from a fixed point, known as the focus, bears a constant ratio to their distance from a fixed line, known as the directrix. This constant ratio is called the eccentricity. This definition unifies all types of conic sections—ellipses, parabolas, and hyperbolas—under a single framework. When the focus is positioned at the origin of the polar coordinate system, a single polar equation can...
395
Curvilinear Motion: Polar Coordinates01:27

Curvilinear Motion: Polar Coordinates

1.2K
In polar coordinates, the motion of a particle follows a curvilinear path. The radial coordinate symbolized as 'r,' extends outward from a fixed origin to the particle, while the angular coordinate, 'θ,' measured in radians, represents the counterclockwise angle between a fixed reference line and the radial line connecting the origin to the particle.
The particle's location is described using a unit vector along the radial direction. Deriving the particle's position...
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Related Experiment Video

Updated: Apr 25, 2026

Laser-Induced Fluorescence Emission L.I.F.E. as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats
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Sustaining observations in the polar oceans.

E P Abrahamsen1

  • 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK epab@bas.ac.uk.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|August 27, 2014
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Summary

Sustained polar ocean observations are crucial for understanding climate change. Novel technologies like seal-borne CTD tags and autonomous platforms are improving year-round data collection in these challenging environments.

Keywords:
AntarcticArcticsustained observations

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Area of Science:

  • Oceanography
  • Climate Science
  • Polar Research

Background:

  • Polar oceans are critical to global ocean circulation and climate regulation.
  • Sea ice cover and icebergs pose significant challenges to traditional oceanographic observation methods.
  • Historically, polar ocean data collection has been limited, primarily occurring during summer months.

Purpose of the Study:

  • To highlight the necessity of sustained observations in polar oceans.
  • To discuss advancements in polar observation techniques.
  • To emphasize the need for international collaboration in polar research.

Main Methods:

  • Utilizing miniature CTD (conductivity-temperature-depth) tags deployed on seals for year-round measurements.
  • Employing autonomous profiling floats and gliders equipped with ice-avoidance capabilities.
  • Leveraging remote sensing technologies to monitor sea ice cover changes.

Main Results:

  • Seal-borne CTD tags have significantly increased year-round data acquisition in previously inaccessible areas.
  • Autonomous platforms with enhanced navigation are improving observational capabilities.
  • Remote sensing provides crucial data on sea ice dynamics at both poles.

Conclusions:

  • Innovative technologies are overcoming historical limitations in polar ocean observation.
  • Continued development and deployment of autonomous systems are vital for future research.
  • Enhanced international cooperation is essential for optimizing polar observing networks and ensuring sustainable data collection.