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

Multimachine Stability01:25

Multimachine Stability

101
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
101
Taping Over Different Ground Profiles01:12

Taping Over Different Ground Profiles

13
Taping over varying ground profiles requires careful adaptation to achieve accurate measurements. On smooth, level ground with minimal vegetation, the tape can rest directly on the ground. Here, the taping team, typically consisting of a head and a rear tapeman, coordinates their positions with clear communication. The rear tapeman holds the tape at the starting point and guides the head tapeman toward a range pole placed beyond the endpoint, using hand or voice signals to ensure alignment.On...
13
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

63
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
63
Friction: Problem Solving01:21

Friction: Problem Solving

185
Friction is an essential force that influences the motion of objects in daily life. Depending on the situation, it can be either beneficial or problematic. Consider a bus with a mass of three megagrams and its center of mass at a specific point, moving along a banked road at a constant speed. The coefficient of static friction between the tires and the road is 0.5. Find the maximum angle of the banked road at which the bus would not slip or tip.
Initially, a visual representation of the...
185
Compacting Factor test01:22

Compacting Factor test

84
The compacting factor test is a method used to assess the workability of concrete. It is  especially suitable for concrete mixes containing aggregates up to one and a half inches in size. This test involves specialized equipment consisting of two truncated cone-shaped hoppers and a cylinder, all with polished interior surfaces to minimize friction.
The procedure begins by placing concrete into the upper hopper without any compaction. Once filled, the bottom door of this hopper is opened,...
84
Load-frequency control01:28

Load-frequency control

92
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
92

You might also read

Related Articles

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

Sort by
Same author

Optimized ceramic powder geopolymer mortar reinforced with basalt fibers for mechanical durability and environmental performance.

Scientific reports·2026
Same author

Effect of Home-Based Exercise Training on Anthropometric Indices and Health-Related Quality of life in Children and Adolescents with Overweight/Obesity: A Randomized Clinical Trial.

Journal of obesity & metabolic syndrome·2026
Same author

The Ketogenic Diet: A Possible Intervention for Improving Hippocampal Function in Neurological Disorders.

Nutrition reviews·2025
Same author

Prevalence and contributing factors of nosocomial bloodstream infections in pediatric cardiac ICU patients at chamran hospital, Isfahan.

ARYA atherosclerosis·2025
Same author

Prevalence and Short-Term Outcomes of Postprocedural Complete Heart Block in Congenital Heart Disease Correction in Children.

The journal of Tehran Heart Center·2025
Same author

Green-synthesized magnetic core-shell NiFe<sub>2</sub>O<sub>4</sub>@Ag nanoparticles enhance antibiotic efficacy against nosocomial pathogens.

Biochemistry and biophysics reports·2025

Related Experiment Video

Updated: May 8, 2025

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.2K

Optimisation of railway tamping scheduling.

Mahdi Khosravi1, Alireza Ahmadi1,2, Ahmad Kasraei1

  • 1Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå, Sweden.

Heliyon
|December 25, 2024
PubMed
Summary

Optimizing railway track tamping schedules balances preventive and corrective actions for cost-effectiveness. A 6-month maintenance cycle offers the best balance, reducing corrective tamping needs and overall costs.

Keywords:
MaintenanceOptimal tamping schedulingRailway tracksTrack geometry degradationTrack geometry measurement alignmentTrack geometry modelling

More Related Videos

Author Spotlight: Optimization of Processing Technology for Tiebangchui with Zanba Based on CRITIC Combined with Box-Behnken Response Surface Method
09:16

Author Spotlight: Optimization of Processing Technology for Tiebangchui with Zanba Based on CRITIC Combined with Box-Behnken Response Surface Method

Published on: May 12, 2023

1.0K
Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm
11:53

Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm

Published on: December 9, 2012

12.9K

Related Experiment Videos

Last Updated: May 8, 2025

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

20.2K
Author Spotlight: Optimization of Processing Technology for Tiebangchui with Zanba Based on CRITIC Combined with Box-Behnken Response Surface Method
09:16

Author Spotlight: Optimization of Processing Technology for Tiebangchui with Zanba Based on CRITIC Combined with Box-Behnken Response Surface Method

Published on: May 12, 2023

1.0K
Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm
11:53

Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm

Published on: December 9, 2012

12.9K

Area of Science:

  • Railway engineering
  • Operations research
  • Asset management

Background:

  • Effective track maintenance is crucial for railway safety and operational efficiency.
  • Current tamping scheduling often struggles to balance preventive and corrective maintenance costs.
  • Optimizing scheduling requires predictive models for track degradation and maintenance impacts.

Purpose of the Study:

  • To develop a cost-effective opportunistic tamping scheduling strategy.
  • To integrate preventive and corrective tamping activities into a unified model.
  • To optimize maintenance intervals based on track quality indicators and cost factors.

Main Methods:

  • Formulated the track geometry tamping scheduling problem as a mixed integer linear programming model.
  • Employed a genetic algorithm for optimizing the scheduling model.
  • Developed predictive models for track quality indicators (standard deviation of longitudinal level, single defects).

Main Results:

  • The fixed cost of maintenance windows significantly impacts total tamping costs.
  • Shorter maintenance intervals (e.g., 3 months) drastically reduce corrective tamping needs compared to longer intervals (e.g., 9 months).
  • A 6-month interval demonstrated an optimal balance between corrective/preventive tamping and total cost in the case study.

Conclusions:

  • Opportunistic tamping scheduling can significantly reduce railway maintenance costs.
  • Predictive modeling and optimized scheduling intervals are key to efficient track maintenance.
  • The proposed model provides a valuable framework for railway infrastructure asset management.