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Zoekresultaten (81)

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HBO/WO

MBO

31 oktober 2025

Bomb Blast Testing

In this video, Andrej Vorkapić details the engineering and testing processes behind bomb blast-resistant facades, explaining that such protection is needed for public buildings and high-risk sites due to threats from terrorism, military action, or accidental industrial explosions. The main danger is the air shock wave from a blast, characterized by its peak pressure and impulse. A successful facade must protect occupants and the main structure, prevent pressure penetration, and—critically—not generate hazardous fragments. While frames can be made from ductile materials like steel or aluminum, the brittle nature of glass is overcome by using laminated glass with a PVB interlayer, which holds the broken pieces in place. The most reliable validation method is physical testing, with two primary types discussed: the cost-effective but incomplete shock tube test and the expensive but highly realistic range test, which was successfully demonstrated on a full-scale sample designed to withstand a 200kg TNT car bomb simulation. The video was produced by the Open GLASSroom project. Special thanks to Andrej Vorkapić and Nebojša Buljan for contributing to the Open GLASSroom OER collection. The creation of these resources has been (partially) funded by the ERASMUS+ grant program of the European Union under grant no. 2022-1-DE01-KA220-HED-000089750. Neither the European Commission nor the project's national funding agency DAAD are responsible for the content or liable for any losses or damage resulting of the use of these resources.

Video

Andrej Vorkapić, Nebojša Buljan

14 maart 2016

Nutr103x 4 6 alternatives to animal testing

Video about alternatives to animal testing

Video

Auteur onbekend

20 juni 2024

Testing theory: an introduction

These lecture notes are a follow up on Adjustment theory. Adjustment theory deals with the optimal combination of redundant measurements together with the estimation of unknown parameters. There are two main reasons for performing redundant measurements. First, the wish to increase the accuracy of the results computed. Second, the requirement to be able to check for mistakes or errors. The present book addresses this second topic. Although one always will try one's best to avoid making mistakes, they can and will occasionally happen. It is therefore of importance to have ways of detecting and identifying such mistakes. Mistakes or errors can come in many different guises. They could be caused by mistakes made by the observer, or by the fact that defective instruments are used, or by wrong assumptions about the functional relations between the observables. When passed unnoticed, these errors will deteriorate the final results. The goal of this introductory course on testing theory is therefore to convey the necessary knowledge for testing the validity of both the measurements and the mathematical model. Typical questions that will be addressed are: 'How to check the validity of the mathematical model? How to search for certain mistakes or errors? How well can errors be traced? And how do undetected errors affect the final results?' The theory is worked out in detail for the important case of linear(ized) models. Both the parametric form (observation equations) and the implicit form (condition equations) of linear models are treated. As an additional aid in understanding the basic principles involved, a geometric interpretation is given throughout. Attention is also paid to the performance of the testing procedures. The closely related concept of reliability is introduced and diagnostic measures are given to determine the size of the minimal detectable biases. In this introductory text the methodology of testing is emphasized, although various examples are given to illustrate the theory. The methods discussed form the basis for geodetic quality control and they provide the ingredients for the formulation of guidelines for the reliable design of measurement set-ups.

Open (Access) Tekst Boek

Peter Teunissen

19 maart 2026

Testing

Main Concepts Technical / engineering testing: Checking whether the system or VR build works correctly, meets requirements, and behaves consistently. Research / participant testing: Testing with participants to verify that the experiment supports the hypothesis and produces valid data. Debugging: Systematically identifying, isolating, and fixing the cause of a technical problem. Learning Goals Distinguish between the two types of testing. Apply a simple technical testing protocol to a project. Systematically identify, document, and fix software or VR errors. Use the Testing Worksheet to maintain traceability and collaboration. Recognize testing as essential quality assurance for both research and development. Key Takeaways Technical testing validates the build before research testing validates the hypothesis. Debugging is guided observation — not random trial and error. Documenting your tests ensures accountability and repeatability. Continuous testing builds confidence and prevents surprises during research trials. A clear testing workflow saves time and makes collaboration smoother. Further Exploration Search for “Unity debugging and testing workflow.” Search for “How to create software testing protocols.” Search for “Difference between pilot study and technical testing.” Search for “Best practice bug tracking templates.”

Video

Lucia M Rabago Mayer, Jordi Weldink, Amanda Poulin

10 maart 2025

EPIFFANI Project Results

These are the combined results for the EPIFFANI Project by Prof. Nicolas Mangin. This project was funded buy SURF's Stimuleringsregeling open en online onderwijs. The aim of the project was to build and test a set of four open source applications for R/integration into the LMS, which allowed teachers to easily automate formative testing through IT solutions. With these applications, teachers can easily and quickly create automate the processing of making tests with personalized feedback for students. The results have three elements: A full project report, which provides context for the creation and creation process A link to Youtube video demonstration of the tools, made for the University of Groningen's education festival 2022 A link to the Github page of project lead Nicolas Mangin. On this page, all the packages can be downloaded, and documentation and instruction are available All tools are licensed under a GPL-3 license, but as this license is not available, it has been noted as CC BY-SA here.

Document

Nicolas Mangin

23 februari 2023

Parentage testing in dogs

These videos show the purpose and principles of parentage testing in dogs by use of DNA markers

Video

Camilla Sichlau Bruun, Claus Jorgensen

22 juli 2017

2. Business Model Testing: Stress testing your BM

In this block, we will introduce business model stress testing, a tool to make sure your business model will withstand future changes whether these are social, technical or political.

Website

Timber Haaker, Mark de Reuver, Harry Bouwman

22 juli 2017

1. Business Model Testing: Introduction to Business Model testing

In this first block we challenge you to formulate criteria for testing your business model. We'll deal with the core question of this course: what makes a good business model, and how can you test this?

Website

Mark de Reuver, Timber Haaker, Harry Bouwman

8 mei 2018

06-02: Scale index construction and assessment - micro lecture Computerized Adaptive Testing

In this micro lecture the following items will be explained regarding this lecture: latent traits items itembank item difficulty adaptive testing computerizedadaptive testing (CAD)

Video

Henk van der Kolk

7 november 2025

Understanding Glass Codes and Standards

In this video, Martina Eliášová outlines the critical role of codes and standards in the use of structural glass in modern architecture. As glass evolves from a simple infill material to a primary structural element in beams, columns, and load-bearing walls, ensuring safety becomes paramount. The framework has evolved from national standards to unified European Eurocodes, which harmonize design, manufacturing, and testing rules across the EU to ensure quality and safety. The key groups of standards cover glass production, material property determination (e.g., EN 1288, EN 16612), and the design of load-bearing structures (with the upcoming EN 19100). Essential testing standards are also outlined, including those for impact resistance from human bodies (EN 12600), manual burglary attacks (EN 356), and resistance to firearms and explosions, all necessary to meet the reliability and safety requirements for building structures throughout their service life. The video was produced by the Open GLASSroom project. Special thanks to Martina Eliášová for contributing to the Open GLASSroom OER collection. The creation of these resources has been (partially) funded by the ERASMUS+ grant program of the European Union under grant no. 2022-1-DE01-KA220-HED-000089750. Neither the European Commission nor the project's national funding agency DAAD are responsible for the content or liable for any losses or damage resulting of the use of these resources.

Video

Martina Eliasova