№ lp_2_3_18872
File format: docx
Character count: 53236
File size: 875 KB
Scientific research article presenting a three-dimensional quantitative analysis of air void spatial arrangement in mortars based on X-ray computed tomography and analytical modeling in the context of freeze-thaw durability.
Authors:
Kai Lyu; E.J. Garboczi; Xiaoyan Liu
Affiliations:
College of Civil and Transportation Engineering, Hohai University, Nanjing, China; National Institute of Standards and Technology, Boulder, CO, USA; Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, China; College of Mechanics and Materials, Hohai University, Nanjing, China
Type of document:
Scientific research article
Subject:
Spatial distribution of air voids in mortars
Keywords:
air void spacing distribution; void–void proximity; paste–void proximity; growing spheres dilation method; random points method; X-ray computed tomography; sand specific surface area
Methodology:
X-ray computed tomography imaging and numerical calculations
Materials studied:
Mortar samples with varying fine aggregate size and blended proportions
Standards referenced:
ASTM C457
Field:
Cement-based materials; construction materials science
Abstracted parameters:
average spacing; SF50; SF95; Gaussian expectation
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The product description is provided for reference. Actual content and formatting may differ slightly.
Note:
Year
Topic:
Road and bridge construction, hot mix asphalt
Document type:
Special provision
Organ / institution:
CDOT (Colorado Department of Transportation)
Target audience:
Contractors working on CDOT construction projects
Year:
2021
Region / city:
Not specified
Theme:
Physics, Mechanical Engineering
Document type:
Research paper
Organization / institution:
Not specified
Author:
Alireza Tahmaseb Zadeh
Target audience:
Researchers, Engineers
Period of validity:
Not specified
Approval date:
Not specified
Date of changes:
Not specified
Year:
Not specified
Region / City:
Not specified
Theme:
Mathematics, Exponents
Document Type:
Educational Activity
Organization / Institution:
Not specified
Author:
Not specified
Target Audience:
Students
Period of Validity:
Not specified
Approval Date:
Not specified
Modification Date:
Not specified
Year:
2026
Grade Level:
5th grade
Subject:
Mathematics
Lesson Number:
33
Duration:
60 minutes
Instructional Focus:
Fluency practice, concept development, word problem solving
Materials:
Divide Decimals Sprint, Personal white board, Problem Set
Standards:
5.NBT.7, 5.OA.1
Learning Objectives:
Create story contexts for numerical expressions and tape diagrams, solve word problems
Target Skills:
Division of decimals, equivalent expressions, reasoning with fractions and mixed numbers
Student Engagement Notes:
Multiple means of engagement strategies included
Year:
Not specified
Region / city:
Not specified
Subject:
Numerical methods, signal processing, approximation error
Document type:
Research article
Organization / institution:
Not specified
Author:
Not specified
Target audience:
Researchers in computational chemistry and signal processing
Validity period:
Not specified
Approval date:
Not specified
Modification date:
Not specified
Year:
2008
Region / City:
University Park, PA
Topic:
Numerical Methods, Signal Processing
Document Type:
Research Paper
Institution:
The Pennsylvania State University
Author:
H.J. Sommer III, Ph.D.
Target Audience:
Researchers, Engineers, Academics
Period of Validity:
Not specified
Approval Date:
Not specified
Modification Date:
Not specified
Title:
Ethiopian Banks Aptitude Exam Questions Part 4
Country:
Ethiopia
Subject:
Banking recruitment examination
Topic:
Arithmetic aptitude and numerical competency
Document type:
Multiple-choice examination questions
Sector:
Banking
Currency mentioned:
Ethiopian Birr
Intended audience:
Bank job applicants
Language:
English
Structure:
Objective questions with four answer options each
Sections:
Arithmetic Aptitude; Numerical Competency
Number of questions:
53
Year:
2026
Region / City:
Northern Illinois University
Topic:
Python programming, Data Visualization, Numerical Methods
Document Type:
Tutorial
Organization / Institution:
Northern Illinois University, Department of Physics
Author:
Unspecified
Target Audience:
Undergraduate students in physics
Period of Application:
Spring 2026
Date of Approval:
Unspecified
Date of Changes:
Unspecified
Year:
2025
Region / City:
Ireland
Subject:
Offshore Renewable Energy Technologies
Document Type:
Application Form
Organization / Institution:
Lir-NOTF, SEAI
Author:
Milad Zabihi
Target Audience:
Irish registered companies in the offshore renewable energy sector, including Irish subsidiaries of overseas companies
Duration:
Testing to be completed by December 2025
Approval Date:
Not specified
Revision Date:
Not specified
Note:
Year
Subject Code:
SEHS4612
Credit Value:
3
Level:
4
Medium of Instruction:
English
Pre-requisite:
SEHS2340 Mathematics II
Prior Knowledge:
Nil
Upon completion of the subject, students will be able to:
analyse simple engineering problems using prior knowledge in engineering mathematics; solve non-linear equations, simultaneous linear algebraic equations, eigenvalue problems, using numerical methods; use numerical differentiation and integration and analyze the errors; investigate various curve fitting techniques to visualize experimental data; use MATLAB or other numerical software tools to compute the solutions of engineering problems using the appropriate numerical methods.
Year:
2018
Topic:
Estimating Crowd Sizes
Document Type:
Educational Practice Worksheet
Audience:
Students
Period:
Not specified
Organization:
Not specified
Author:
Not specified
Date of Approval:
Not specified
Date of Changes:
Not specified
Subject:
Physics
Class Level:
XII
Topic:
Electrostatics
Type of Document:
Holiday Assignment
Content Type:
Numerical Problems
Concepts Covered:
Coulomb’s Law, Electric Field, Electric Potential, Electric Flux, Gauss’s Law, Dipole Field, Charge Density
Units Used:
SI Units
Physical Constants Referenced:
ε0, electron charge, proton mass
Format:
Problem Set
Year:
2026
Region / City:
Not specified
Topic:
Energy barriers in magnetic stripe domains
Document Type:
Research Supplementary Material
Organization / Institution:
Not specified
Author:
Kyoung-Woong Moon, Seungmo Yang, Changsoo Kim, Tae-Seong Ju, Chanyong Hwang
Target Audience:
Researchers in material science and physics
Period of validity:
Not specified
Approval Date:
Not specified
Date of Changes:
Not specified
Year:
N/A
Region / City:
N/A
Topic:
Mathematics
Document Type:
Educational Material
Institution:
N/A
Author:
N/A
Target Audience:
Students (specifically those learning algebra)
Period of Validity:
N/A
Approval Date:
N/A
Date of Changes:
N/A
Year:
2023
Region / city:
Not specified
Subject:
Cancer treatment, Microwave ablation, Numerical modeling
Document type:
Research paper
Institution:
Not specified
Author:
Not specified
Target audience:
Researchers, Medical professionals, Scientists
Effective period:
Not specified
Approval date:
Not specified
Modification date:
Not specified
Date:
March 4, 2013
Subject:
Matlab programming and numerical methods
Topics:
Variable naming rules, programming functions, built-in Matlab functions, algorithms for solving non-linear equations
Software:
Matlab
Programming concepts:
Variables, user-defined functions, built-in functions
Mathematical topics:
Root finding, numerical analysis
Algorithms discussed:
Bisection method, Regula-Falsi method, Newton-Raphson method, Secant method, Fixed-Point Iteration
Educational context:
Review for Exam 1
Document type:
Lecture notes
Field of study:
Engineering computation / numerical methods
Audience:
Students studying Matlab and numerical solution methods