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

Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

79
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.
79
Quarrying of Stone01:15

Quarrying of Stone

109
Quarrying is the process of extracting stone from a quarry, where specialized techniques are employed to remove large blocks of stone safely and efficiently. This process can involve controlled explosions or more precision-oriented methods such as cutting and drilling.
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the...
109
Design Example: Maintaining Level of an Embankment01:19

Design Example: Maintaining Level of an Embankment

61
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
61
Preplaced Aggregate Concrete01:29

Preplaced Aggregate Concrete

95
Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
95
Deleterious Substances in Aggregate01:25

Deleterious Substances in Aggregate

164
Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
Another type of impurity is clay and fine material that...
164
Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

43
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
43

You might also read

Related Articles

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

Sort by
Same author

Long-cycling and High-voltage Solid State Lithium Metal Batteries Enabled by Fluorinated and Crosslinked Polyether Electrolytes.

Angewandte Chemie (International ed. in English)·2024
Same author

Succulent-Inspired Implicit Structural Change for Smart "ON/OFF" Switchable and Flexible EMI Shielding Coating.

ACS applied materials & interfaces·2024
Same author

Global research on RNA vaccines for COVID-19 from 2019 to 2023: a bibliometric analysis.

Frontiers in immunology·2024
Same author

Macular Neural and Microvascular Alterations in Type 2 Diabetes Without Retinopathy: A SS-OCT Study.

American journal of ophthalmology·2024
Same author

Tumor characteristics, brain functional activity, and connectivity of tinnitus in patients with vestibular schwannoma: a pilot study.

Quantitative imaging in medicine and surgery·2024
Same author

Dysregulation of ferroptosis-related genes in granulosa cells associates with impaired oocyte quality in polycystic ovary syndrome.

Frontiers in endocrinology·2024

Related Experiment Video

Updated: Jun 23, 2025

Project-Based Learning Guidelines for Health Sciences Students: An Analysis with Data Mining and Qualitative Techniques
13:44

Project-Based Learning Guidelines for Health Sciences Students: An Analysis with Data Mining and Qualitative Techniques

Published on: December 9, 2022

3.5K

Mining LDA topics on construction engineering change risks based on graded evidence.

Lianghai Jin1,2,3,4, Chenxi Li1,2, Zhongrong Zhu1,2,4

  • 1Hubei Key Laboratory of Hydro-Power Construction and Management, China Three Gorges University, Yichang, Hubei, China.

Plos One
|June 20, 2024
PubMed
Summary

This study introduces a new method for managing engineering change (EC) risks by grading evidence reliability. Technical risks, including design defects, are identified as the most significant EC risks.

More Related Videos

Involving Individuals with Developmental Language Disorder and Their Parents/Carers in Research Priority Setting
06:16

Involving Individuals with Developmental Language Disorder and Their Parents/Carers in Research Priority Setting

Published on: June 6, 2020

3.7K
Watershed Planning within a Quantitative Scenario Analysis Framework
12:44

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

8.0K

Related Experiment Videos

Last Updated: Jun 23, 2025

Project-Based Learning Guidelines for Health Sciences Students: An Analysis with Data Mining and Qualitative Techniques
13:44

Project-Based Learning Guidelines for Health Sciences Students: An Analysis with Data Mining and Qualitative Techniques

Published on: December 9, 2022

3.5K
Involving Individuals with Developmental Language Disorder and Their Parents/Carers in Research Priority Setting
06:16

Involving Individuals with Developmental Language Disorder and Their Parents/Carers in Research Priority Setting

Published on: June 6, 2020

3.7K
Watershed Planning within a Quantitative Scenario Analysis Framework
12:44

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

8.0K

Area of Science:

  • Engineering Management
  • Risk Management
  • Information Science

Background:

  • Engineering change (EC) risks can negatively impact project outcomes, including schedule, cost, quality, and stakeholder satisfaction.
  • Current EC risk management methods often lack robust evidence selection and do not sufficiently consider evidence quality and reliability.
  • Evidence grading is essential for reliable decision-making in EC risk management, providing scientific and reliability support.

Purpose of the Study:

  • To develop a methodology for identifying and prioritizing potential risks associated with architectural engineering changes (ECs).
  • To enhance the reliability of EC risk management by integrating evidence grading with topic analysis.

Main Methods:

  • A methodology combining evidence grading theory and Latent Dirichlet Allocation (LDA) topic analysis was proposed.
  • Evidence sources for EC risks were categorized into three credibility levels using evidence-based grading theory.
  • Higher credibility evidence was analyzed using LDA topic modeling to identify EC risk themes, factors, and key risks through expert surveys.

Main Results:

  • Five prominent EC risk themes were identified: contract, technology, funds, personnel, and other hazards.
  • Technical risks emerged as the most significant category of EC risks.
  • Key risks identified include engineering design defects, errors, and omissions.

Conclusions:

  • The proposed methodology effectively identifies and prioritizes EC risks by leveraging evidence grading and LDA topic analysis.
  • Understanding the hierarchy and nature of EC risks, particularly technical ones, is crucial for effective project management.
  • Reliable evidence assessment is fundamental for mitigating negative impacts of engineering changes.