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Related Concept Videos

Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55 °C.
Magnetic Field Due To A Thin Straight Wire01:27

Magnetic Field Due To A Thin Straight Wire

Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...

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Related Experiment Video

Updated: Jun 7, 2026

Force System with Vertical V-Bends: A 3D In Vitro Assessment of Elastic and Rigid Rectangular Archwires
08:46

Force System with Vertical V-Bends: A 3D In Vitro Assessment of Elastic and Rigid Rectangular Archwires

Published on: July 24, 2018

Modifications in straight wire treatment.

Alvin Cardona

    International Journal of Orthodontics (Milwaukee, Wis.)
    |November 2, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces the Modified Straight Wire or Physiologic Arch Technique for orthodontic treatment. This approach uses light, continuous forces for improved dental alignment, function, and facial esthetics with minimal patient cooperation.

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    Area of Science:

    • Dentistry
    • Orthodontics
    • Biomedical Engineering

    Background:

    • Orthodontic treatments evolve with clinical generations, prioritizing facial aesthetics and temporomandibular joint health.
    • Orthopedic treatment aids in dental arch development, creating space for alignment, and achieving functional and aesthetic outcomes with stability.

    Purpose of the Study:

    • To demonstrate a fixed orthopedic and orthodontic approach termed "Modified Straight Wire" or "Physiologic Arch Technique."

    Main Methods:

    • Combines two-phase treatment utilizing low-friction fixed orthodontics and super-elastic wires.
    • Employs light, continuous forces to elicit physiological and functional orthopedic orthodontic reactions.

    Main Results:

    • Achieves dental arch development for tooth alignment, adequate function, and esthetics.
    • Demonstrates successful patient outcomes due to slow and continuous force application.
    • Requires minimal patient cooperation for effective treatment.

    Conclusions:

    • The Modified Straight Wire/Physiologic Arch Technique offers an effective method for orthodontic treatment.
    • This technique enhances patient results through controlled, continuous forces.
    • It successfully balances esthetics, function, and stability in orthodontic care.