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Related Concept Videos

Problem-Solving: Tuning of a Guitar String01:04

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In the case of stringed instruments like the guitar, the elastic property that determines the speed of the sound produced is its linear mass density or the mass per unit length. This is simply called the linear density. If the string's linear density is constant along the string, then the linear density is simply the total mass divided by the total length.
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Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
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A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
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Modes of Standing Waves: II01:04

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The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
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Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
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An important characteristic of any set of data is the variation in the data. In some data sets, the data values are concentrated closely near the mean; in other data sets, the data values are more widely spread out from the mean. The most common measure of variation, or spread, is the standard deviation, which is the square root of variance.
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Related Experiment Video

Updated: Jun 15, 2025

Non-radioactive in situ Hybridization Protocol Applicable for Norway Spruce and a Range of Plant Species
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Insights from the Implementation of Open Notes in Sweden.

Åsa Cajander1, Hilde G Corneliussen2, Morten Hertzum3

  • 1Uppsala University, Lägerhyddsvägen 1, Uppsala, Sweden.

Studies in Health Technology and Informatics
|August 23, 2024
PubMed
Summary

Sweden

Keywords:
Electronic health recordonline record accessopen notes

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Area of Science:

  • Health Informatics
  • Patient Access to Records

Background:

  • Implementing Open Notes (patient access to clinical records) in Sweden presents unique challenges.
  • Regional variations and differing needs of patients and providers complicate the process.

Purpose of the Study:

  • To explore managers' experiences and strategies during Open Notes implementation in Sweden.
  • To understand how uncertainty and conflicting perspectives were managed.

Main Methods:

  • Qualitative interview study with healthcare managers.
  • Focus on five of Sweden's 21 regions.

Main Results:

  • Uncertainty was a pervasive theme during implementation.
  • Managers employed strategies to balance diverse stakeholder needs.

Conclusions:

  • Findings offer insights into optimizing Open Notes implementation.
  • Recommendations for policymakers and healthcare organizations to improve patient care access.