Ionic strength of the liquid phase of different sludge streams in a wastewater treatment plant

In a wastewater treatment plant (WWTP), several sludge streams exist and the composition of their liquid phase varies with time and place. For evaluating the potential for formation of precipitates and equilibria for weak acids/bases, the ionic strength and chemical composition need to be known. This information is often not available in...

Long-Term Dynamics of Institutions: Using ABM as a Complementary Tool to Support Theory Development in Historical Studies

Historical data are valuable resources for providing insights into general sociological patterns in the past. How-ever, these data often inform us at the macro-level of analysis but not about the role of individuals’ behaviours in the emergence of long-term patterns. Therefore, it is difficult to infer ‘how’ and ‘why’ certain patterns emerged in...

Design of a data collector for HEMS crew during OHCA

The HEMS crew is planning to conduct research on implementing ECPR treatment during OHCA cases. A data collector that collects time and chest compression data is needed for the research. Thus, this graduation project is focused on the design of a data collector for HEMS crew during OHCA. This report describes the whole process of developing the...

The future of AED training for laypeople

Ability to provide the first aid is one of the most powerful skills which can save someone’s life. The survival rate of out of hospital cardiac arrest in Europe is only 9%, even though AED (automated external defibrillators) can be accessed in public places to treat it successfully in most of the cases. First aid training is recognised as the...

Putting Heart in CPR: A new way to practice Cardiopulmonary resuscitation

Most cardiac arrests happen within the home and only 10% of these victims will survive. If a victim can receive CPR within the first 6 minutes of a cardiac event then their chances of survival increase to 45%.<br/><br/>LivisOra helps you prepare for this moment. Ora is a CPR training aid that assists anyone to master chest compressions and...

Philips LifeShield: CPR guidance for (untrained) responders

This Master graduation project describes the product development of the Philips Lifeshield, a smartwatch that provides cardiopulmonary resuscitation guidance device for (untrained) lay responders. The problem is that every year between 350,000 and 700,000 Europeans suffer and out-of-hospital cardiac arrest. In 51% of the cases these events are...

Development of a deflation-based linear solver in reservoir simulation

Extreme and isolated eigenvalues are known to be harmful to the convergence of the iterative solver. These eigenvalues are produced by strong heterogeneity in the underlying physics. We can improve the quality of the spectrum by ‘deflating’ the harmful eigenvalues. In this thesis, deflation is applied to linear systems in reservoir simulation....