Numerical analysis of multiaxial test setup for composite cryogenic hydrogen tank development

Hydrogen is one of aviation's most promising fuel alternatives in the coming years. However, to store it, a large and light vessel is needed. <br/><br/>The solution to this problem can be the carbon fibre fuel tank. Composite structures provide significant weight savings, which is crucial in this application. However, despite its superior...

Testing of Interconnect and Contact Defects in STT-MRAMs

Spin-transfer-torque magnetic random access memory (STT-MRAM) is regarded as one of the most promising non-volatile memory (NVM) technologies, which has the potential to replace the traditional memories in the modern memory hierarchy. Due to some advantages such as non-volatility, fast access speed, low leakage power and high density, more and...

Development of Resonance-Based Test System to Measure Lifetime Curves of Dielectric Materials

With the increasing growth and penetration of power electronic devices in the power system, it is essential to understand the behaviour of insulation materials and systems under the varied signals that are produced with power electronic systems. These signals could be square pulses, sinusoidal or even superimposed. The high-frequency sinusoidal...

Automated testing for self-driving cars using real-world roads

Cyber-physical systems are complex systems constructed from different independent parts. A self-driving car is an example of a cyber-physical system where independent parts have to come together in order to result in a car that is able to drive by itself. The main challenge is finding failures within the interactions between the independent...

Hydrocarbon Seeded ABS - Nitrous Hybrid Engine Development: Experimental Validation of an Analytical Design Tool

After the breakup of the Stratos III vehicle, inertial roll coupling was pinpointed to be the root cause. In order to battle the problem a propulsive roll control system was suggested to keep the roll rate under acceptable bounds. A restartable hybrid rocket engine using nitrous oxide and ABS plastic was proposed. 27 tests have been performed of...

They could live - encoding invisible information in displays and ways to extract it

In the recent years, several papers have implemented methods which seamlessly integrate data streams into high frame rate monitors without affecting casual viewer experience. This paper proposes an improvement to existing systems which can in theory increase the data throughput of the data stream several times. Exploiting the same...

Training a Machine-Learning Model for Optimal Fitness Function Selection with the Aim of Finding Bugs

To ensure that a software system operates in the correct way, it is crucial to test it extensively. Manual software testing is severely time-consuming, and developers often underestimate its importance. Consequently, many tools for automatic test generation have been developed during the past decade. EvoSuite is a state-of-the-art tool for...

Detecting Unique RRAM Faults: High Fault Coverage Design-For-Testability Scheme

Resistive Random-Access Memory (RRAM) is an emerging memory technology that has the possibility to compete with mainstream memory technologies such as Dynamic Random-Access Memory (DRAM) and flash memory. The reason why RRAM has not seen mass adoption yet is due to its defect-prone nature. The resistance of RRAM can assume any value within its...

Collective test: Can generative tools working autonomously create new cultures in the long run?

The term AI has entered the creative industry in the last decades. Computer based design is now omnipresent in everyday life. Will AI take over the creative industry? Can they autonomously be creative? These are some of the headlines propagated by the mainstream media. This paper will unveil the human labor behind these computer generated...

Redesigning the Spoofax Testing Language

The Spoofax Testing Language (SPT) is the existing solution for testing in the Spoofax language workbench. It allows developers of domain specific languages to write their test cases declaratively. As it aims to be implementation agnostic, developers don't need to concern themselves with the details of the artifacts generated by Spoofax, and can...

Effective Thermal Testing and Potential Design Solutions for PocketQube Subsystems

The PocketQube is an emerging satellite class, which pushes the miniaturization of space technology beyond the well-established CubeSats, promising rapid design-to-orbit cycles while lowering the cost of accessing space. A showstopper in the success story of nano- and picosatellites are their high mission failure rates. Environmental testing...

Testing Code Generators against Definitional Interpreters

Large companies suffer from the increasing complexity that exist in their software systems. Evolving their software becomes even harder if we consider that a change in one system can affect several other parts of their software architecture. Especially banks that need to be always complied with regulations, have to constantly make changes in...

Shaping KLM X-Flights: Creating co-design with cabin crew, passengers and startups in the airline industry, to facilitate test flights

The identified problem KLM has, is a knowledge gap between KLM employees in middle and higher management and KLM’s frontline staff (FLS). New ideas or processes are created at KLM’s headquarters by ‘thinkers’, while these new ideas or processes need to be executed and iterated by front live staff, ‘do-ers’. By involving startups in their...