Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Vector Algebra: Graphical Method01:10

Vector Algebra: Graphical Method

15.3K
Vectors can be multiplied by scalars, added to other vectors, or subtracted from other vectors. The vector sum of two (or more) vectors is called the resultant vector or, for short, the resultant.
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
15.3K
Theorems of Pappus and Guldinus: Problem Solving01:12

Theorems of Pappus and Guldinus: Problem Solving

836
Pappus and Guldinus's theorems are powerful mathematical principles that are used for finding the surface area and volume of composite shapes. For example, consider a cylindrical storage tank with a conical top. Finding the surface area or volume can be challenging for such complex shapes. These theorems are particularly useful in calculating the volume and surface area of such systems. Here, the cylindrical storage tank with a conical top can be broken down into two simple shapes: a...
836
Statically Indeterminate Problem Solving01:16

Statically Indeterminate Problem Solving

526
Statically indeterminate problems are those where statics alone can not determine the internal forces or reactions. Consider a structure comprising two cylindrical rods made of steel and brass. These rods are joined at point B and restrained by rigid supports at points A and C. Now, the reactions at points A and C and the deflection at point B are to be determined. This rod structure is classified as statically indeterminate as the structure has more supports than are necessary for maintaining...
526
Castigliano's Theorem: Problem Solving01:14

Castigliano's Theorem: Problem Solving

809
The deflection of a simply supported beam that carries a central point load can be analyzed using structural mechanics principles, particularly by applying Castigliano's theorem. This theorem relates the displacement at the load application point to the partial derivatives of the strain energy in the structure. The simply supported beam with a point load at its center has symmetric reaction forces at the supports, each bearing half of the load. The bending moment at any point along the beam...
809
SFG Algebra01:16

SFG Algebra

187
In Signal Flow Graph (SFG) algebra, the value a node represents is determined by the sum of all signals entering that node. This summed value is then transmitted through every branch leaving the node, making the SFG a powerful tool for visualizing and analyzing control systems.
Each node in an SFG corresponds to a variable, and the interactions between nodes are represented by branches with associated gains. When multiple branches lead into a node, the value at that node is the sum of the...
187
Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

330
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
330

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same journal

Generators for Discrete Polynomial L<sub>1</sub> Approximation Problems.

Journal of research of the National Bureau of Standards (1977)·2021
Same journal

Room Temperature Poling of Poly(Vinylidene Fluoride) with Deposited Metal Electrodes.

Journal of research of the National Bureau of Standards (1977)·2021
Same journal

Molecular Dynamics Study of Liquid Rubidium and the Lennard-Jones Fluid.

Journal of research of the National Bureau of Standards (1977)·2021
Same journal

Isoionic Isotope Exchange with Hydroxylapatite and the Dilution Effect.

Journal of research of the National Bureau of Standards (1977)·2021
Same journal

Observations of Surface Changes in Platinum Crucibles.

Journal of research of the National Bureau of Standards (1977)·2021
Same journal

Theory of Flow-Induced Fibril Formation in Polymer Solutions.

Journal of research of the National Bureau of Standards (1977)·2021
See all related articles

Related Experiment Video

Updated: Oct 10, 2025

Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps
11:52

Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps

Published on: February 9, 2017

6.1K

A Graph Coloring Algorithm for Large Scheduling Problems.

Frank Thomson Leighton1

  • 1Center for Applied Mathematics, National Bureau of Standards Washington, DC 20234.

Journal of Research of the National Bureau of Standards (1977)
|December 9, 2021
PubMed
Summary
This summary is machine-generated.

A novel graph coloring algorithm demonstrates efficient O(n^2) time complexity for sparse graphs, making it ideal for large-scale scheduling. A new method for generating test graphs aids in evaluating algorithm performance.

Keywords:
05C1568A1068A2090B35Algorithmchromatic numbercolor functiongraphgraph coloringheuristicinterchangerandom test graphsschedulingtime complexity

More Related Videos

Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy
07:53

Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy

Published on: August 5, 2022

2.2K
Revealing Neural Circuit Topography in Multi-Color
09:11

Revealing Neural Circuit Topography in Multi-Color

Published on: November 14, 2011

15.2K

Related Experiment Videos

Last Updated: Oct 10, 2025

Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps
11:52

Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps

Published on: February 9, 2017

6.1K
Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy
07:53

Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy

Published on: August 5, 2022

2.2K
Revealing Neural Circuit Topography in Multi-Color
09:11

Revealing Neural Circuit Topography in Multi-Color

Published on: November 14, 2011

15.2K

Area of Science:

  • Computer Science
  • Discrete Mathematics
  • Algorithm Analysis

Background:

  • Graph coloring is a fundamental problem in computer science with applications in resource allocation.
  • Existing algorithms face scalability challenges with large and complex graphs.

Purpose of the Study:

  • Introduce a new graph coloring algorithm.
  • Evaluate its performance against established methods.
  • Provide a tool for heuristic evaluation of graph coloring algorithms.

Main Methods:

  • Developed a novel graph coloring algorithm.
  • Implemented and compared its performance with existing algorithms.
  • Created a procedure for generating random test graphs with a known chromatic number.

Main Results:

  • The new algorithm exhibits O(n^2) time complexity on sparse graphs.
  • It is particularly effective for large-scale scheduling problems.
  • Heuristic evaluations using generated test graphs provide insights into algorithm capabilities.

Conclusions:

  • The proposed graph coloring algorithm offers an efficient solution for sparse graph problems.
  • Its performance characteristics make it suitable for practical applications like scheduling.
  • The graph generation procedure is a valuable tool for future algorithm research.