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Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
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Multiple comparison test, abbreviated as MCT, is a post hoc analysis generally performed after comparing multiple samples with one or more tests. An MCT will help identify a significantly different sample among multiple samples or a factor among multiple factors.
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The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...
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Quality assurance is the overarching term used to describe the activities employed to ensure the proper performance of a system. These activities can be classified into three categories: quality control, quality assessment, and internal corrective measures. Typically, these activities work cyclically: quality control is performed before and during the analysis, while quality assessment occurs during and after the investigation. Internal corrective measures are implemented based on the findings...
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A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
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Metamorphic Testing for Cybersecurity.

Tsong Yueh Chen1, Fei-Ching Kuo1, Wenjuan Ma2

  • 1Department of Computer Science and Software Engineering, Swinburne University of Technology, Australia.

Computer
|August 26, 2016
PubMed
Summary
This summary is machine-generated.

Metamorphic testing (MT) offers a novel approach to software defect detection, particularly for security features. This method aids in negative testing and addresses the oracle problem, enhancing cybersecurity through diverse testing perspectives.

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Area of Science:

  • Software Engineering
  • Cybersecurity
  • Software Testing

Background:

  • Software defects, including security vulnerabilities, pose significant risks.
  • Traditional testing methods face challenges in detecting certain types of software flaws.
  • Security features require rigorous testing to ensure robust protection.

Purpose of the Study:

  • Introduce metamorphic testing (MT) as an advanced software testing technique.
  • Explore MT's utility in negative testing and addressing the oracle problem for security functions.
  • Advocate for diverse testing perspectives to improve cybersecurity.

Main Methods:

  • Application of metamorphic testing principles to security-related software functionality.
  • Utilizing MT to identify defects in critical applications like compilers and code obfuscators.
  • Comparative analysis of MT against traditional testing for security feature validation.

Main Results:

  • Metamorphic testing effectively detected previously unknown bugs in real-world applications.
  • MT demonstrated significant advantages in testing security-related functionality.
  • The approach proved valuable in alleviating the oracle problem in software testing.

Conclusions:

  • Metamorphic testing is a powerful technique for enhancing software security.
  • Diverse testing perspectives are crucial for achieving comprehensive cybersecurity.
  • Further adoption of MT is recommended for robust security feature validation.