Cost estimation and management control of software development in scientific/technical projects

Cost estimation of software development.and the monitoring and control of factors which affect the development cost is difficult due to the lack of uniformity in the development approach, to the lack of a standard terminology and due to the limited and difficult to access cost data bases. This report presents a cost estimation approach, together...

Air bubbles for water quality improvement

Thermal stratification in water supply reservoirs can result in a serious degradation in water quality. The techniques of artificial mixing and aeration, using air bubbles, have been applied in a number of impoundments to prevent the formation of the anaerobic conditions that lead to poor water quality. The first part of this report describes...

Optimalisatietechnieken in kwantitatief en kwalitatief waterbeheer

Modellering Rijnwaterkwaliteit: Probleemanalyse

Evaluatie van de nota's 73-08 en 74-09 van de projektgroep Hollands Diep-Haringvliet en enkele algemene beschouwingen over het toepassen van massabalansen

Modellering Rijnwaterkwaliteit: Evaluatie zuurstofmodellen

Waterkwaliteitsmodel Rijn: Processen zuurstofmodellering

De toepassing van schade-onderzoek in de luchtvaart

Following an introduction about the methods of failure smalysis the present paper illustrates by meaJis of actual case histories the role of service failure analysis in defining new inspection procedures and the adapting of existing ones. It appears that in some cases this leads to a different design or choice of material. The examples are all...

Verspreiding schutwater Kreekraksluizen in de kom van de Oosterschelde

Systeem analyse in het waterbeheer: Een verkennende studie

Optimalisering van de bemonsteringsfrekwenties van de waterkwaliteitsparameters in het Brielse Meer: Verslag wiskundig onderzoek

Experiences with mathematical models used for water quality and quantity problems

The use of models for solving water quality and quantity problems is not restricted to mathematical modeIs, as other types also have their possibilities and drawbacks. Mathematical methods, however, have certain properties which make them particularly suitable for water management studies. The examples of mathematical models dealt with in this...

Hydrography of the Dutch Wadden Sea

In this paper an attempt has been made to describe for the Dutch Wadden Sea water movement, transport of suspended matter and the cycle of suspended organic matter. Stress has been laid on the fact that these are related subjects, which therefore ought to be studied in combination. The discussion was based on observations made in the years 1949...