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Related Concept Videos

Rationalizing Substitutions01:29

Rationalizing Substitutions

Integrals involving non-rational functions are often difficult to evaluate using standard techniques, especially when radicals appear in the integrand. Rationalizing substitution provides a systematic method for simplifying such integrals by converting them into rational forms that are easier to handle.Consider a rod whose linear mass density depends on a constant linear density, a characteristic length, and the distance from the left end of the rod. Determining the total mass requires...

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Related Experiment Video

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Introducing an Angle Adjustable Cutting Box for Analyzing Slice Shear Force in Meat
09:30

Introducing an Angle Adjustable Cutting Box for Analyzing Slice Shear Force in Meat

Published on: April 26, 2013

Rationalization in meat cutting - consequences on physical workload.

Inger Arvidsson1, Istvan Balogh, Gert-Åke Hansson

  • 1Occupational and Environmental Medicine, Lund University Hospital, Sweden. inger.arvidsson@med.lu.se

Applied Ergonomics
|April 6, 2012
PubMed
Summary

New meat cutting systems reduce physical workload for workers. Mechanization, like using electrical saws and line production, lowers ergonomic risks and musculoskeletal disorder potential compared to traditional knife methods.

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Area of Science:

  • Occupational Health
  • Ergonomics
  • Industrial Engineering

Background:

  • Meat cutting involves significant ergonomic risks and musculoskeletal disorder (MSD) prevalence.
  • Advancements in production systems increase mechanization, altering worker tasks and physical demands.

Purpose of the Study:

  • To evaluate and compare the physical workload across different meat carcass processing systems.
  • To assess the impact of mechanization on worker postures, movements, and muscular load.

Main Methods:

  • Utilized inclinometry, goniometry, and electromyography to measure worker physical exposure.
  • Compared three systems: split-carcass (knife), sixth-part (electrical saw), and line production.
  • Analyzed posture variation using a novel inclinometry-based method.

Main Results:

  • Increasing mechanization significantly reduced physical exposure across most measured parameters.
  • Movement velocities of the upper arm were highest in the split-carcass system and lowest in line production.
  • The split-carcass system showed the highest within-minute posture variation but the lowest between-minute variation.

Conclusions:

  • Line production systems demonstrate a significantly lower physical workload compared to the traditional split-carcass method.
  • The sixth-part system also tended to reduce physical workload compared to split-carcass processing.
  • While reducing physical strain, line production may introduce challenges like machine-paced work and shorter cycles.