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Related Concept Videos

The Y-to-Y Circuit01:19

The Y-to-Y Circuit

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In a balanced four-wire wye-to-wye system, the arrangement involves wye-connected sinusoidal voltage sources and loads, connected through a neutral wire that links the neutral nodes of the source and load. The load impedance is connected across each phase of the load. The wye-connected source can be connected to the wye-connected load in four-wire and three-wire arrangements. A three-phase system is considered balanced when the load on each phase is equal, leading to uniform current flow and...
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The Delta-to-Y Circuit01:16

The Delta-to-Y Circuit

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In the delta-wye circuit, the source is delta-connected, while the load is in a wye configuration. This means that the phase voltage of the delta-connected source is equal to the line voltage of the wye-connected load. The connection between two-line currents originates from the delta-connected source. The phase difference in the balanced system allows for calculating one line current given the other, utilizing the positive sequence of phases. In the delta-wye system, the phase currents in the...
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Magnetic Fields01:27

Magnetic Fields

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A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
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The Y-to-Delta Circuit01:19

The Y-to-Delta Circuit

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A balanced wye-to-delta circuit comprises balanced Y-connected voltage sources and delta-connected loads with no neutral line connection.
The initial step in analyzing a wye-to-delta circuit is to assume a positive phase sequence. These phase voltages are then utilized to calculate the line voltages that occur directly across the delta-connected load impedances. Van, Vbn, and Vcn are the phase voltages in wye, and Vab, Vbc, and Vca are the line voltages for a delta circuit. The relation between...
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Two-Dimensional Force System01:20

Two-Dimensional Force System

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A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved into its components as:
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Newton's Third Law: Introduction00:58

Newton's Third Law: Introduction

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Whenever one body exerts a force on a second body, the first body experiences a force equal in magnitude and opposite in direction, to the force that it exerts. For instance, when a person pushes on a wall, the wall exerts an equal and opposite force towards the person. This brings us to Newton's third law of motion. Newton's third law represents a certain symmetry in nature: Forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
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Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence
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[GINA 2014: Yin and Yang].

P Kardos1

  • 1Gemeinschaftspraxis & Zentrum für Allergologie, Pneumologie & Schlafmedizin.

Pneumologie (Stuttgart, Germany)
|December 10, 2014
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Summary

The Global Initiative for Asthma (GINA) released a revised report in 2014, shifting its focus from strict guidelines to a practical approach for asthma management. This update emphasizes a more pragmatic strategy for clinical practice.

Area of Science:

  • Respiratory Medicine
  • Clinical Practice Guidelines

Context:

  • The Global Initiative for Asthma (GINA) published its first fully revised report in 8 years in May 2014.
  • The new GINA report was presented at the European Respiratory Society (ERS) conference 2014 in Munich.

Purpose:

  • To present the fully revised Global Initiative for Asthma (GINA) report.
  • To highlight the updated GINA statement emphasizing a practical approach to asthma management.

Summary:

  • The 2014 GINA report redefines its role, moving from a prescriptive guideline to a flexible, practical approach for asthma management.
  • Key changes were presented at the European Respiratory Society (ERS) conference, stressing a pragmatic strategy for clinical practice.

Impact:

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Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence
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Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence

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  • The revised GINA approach may indicate a shift towards more adaptable asthma care strategies.
  • This change could influence how healthcare professionals manage asthma in clinical settings, potentially reducing liability concerns.