The recent developments in the building industry to build more sustainable should result in the use of light constructions with a low environmental impact. Timber is a suitable material for this purpose. To reduce the environmental impact of a building, an improvement in an often used structural element can have a significant impact on the sustaina...
Published in IOP Conference Series: Earth and Environmental Science
The research aims to study the effect of the fuel type, plow types, and engine speeds on Tractor Seat Vibrations (TSV), Noise of Agricultural Tractors(NAT), and fuel consumption. The field experiments were conducted on an experimental farm in Al-Hamdaniya, Nineveh province, Iraq. The investigation was factorial, using a Randomized Complete Block De...
The present work focuses on ambient vibrations energy harvesting. Specifically, this article deals with bistable piezoelectric energy harvester. In order to rectify the piezoelectric voltage and to supply power to autonomous sensors, these systems require an energy extraction circuit. As an interesting feature, energy extraction circuits allow to i...
In order to facilitate the development of wrist-worn vibrotactile devices, detailed knowledge about how vibrations are perceived by the users is needed. In particular, perceptual thresholds in amplitude are really important. Thresholds have been measured in the literature for other areas of the body, but given the variability reported between areas...
Space debris and micrometeoroids are abundant around our home planet and offer both an opportunity of research for scientists and a threat to human’s endeavours in space. Impacts with even the smallest particles can happen at such high velocities that they can damage or destroy an operational spacecraft, creating even more debris and possibly endan...
This dissertation describes our study of the fundamental role vibrations play in the excited-state dynamics of semiconducting energy materials. We examine these effects in self-assembled organic semiconducting nanostructures and small molecules, focussing on the implications for exciton transport, energy transfer, and light emission. Special use of...
Les oscillateurs optoélectroniques (OEO) représentent une solution alternative aux traditionnels oscillateurs à quartz pour la génération de références de fréquence de haute pureté spectrale. Pour les applications les plus exigeantes, les performances de bruit de phase doivent être maintenues dans des environnements vibratoires sévères. L'objectif ...
A non-linear Euler-Lagrange (EL) controller is proposed for underactuated mechanical Euler-Lagrange systems. The rationale is that mimicking the process structure in the controller will lead to improved performance. The tuning of the controller can be rather intuitive as it can be seen as an auxiliary mechanical system that is connected to the proc...
Impact sound can be caused, for example, by children jumping and playing or by other types of mechanical contact with the structure. Insufficient impact sound insulation in lightweight timber structures is a recurring issue and is of great importance for the overall quality assessment of residential buildings. Impact sound is a complex topic that, ...
This thesis aims to explore if multibody simulations is a suitable method to investigate vibrations in the steering system of trucks. Vibrations in the steering system and subsequently in the steering wheel is a common issue that automotive manufacturers face. The vibration levels in the steering wheel are in some countries regulated and some vibra...
