Air defence in Northern Europe

Finnish Defence Studies is published under the auspices of the National Defence College, and the contributions reflect the fields of research and teaching of the College. Finnish Defence Studies will occasionally feature documentation on Finnish Security Policy. Views expressed are those of the authors and do not necessarily imply endorsement by the National Defence College.

Helsinki hub – new traffic flows and business networks

This thesis is the Logistics Development Forum's assignment and the work dealing with the development of the Port of Helsinki as part of Helsinki hub. The Forum aims to develop logistics efficiency through public-private co-operation and development of the port is clearly dependent on both factors. Freight volumes in the Port of Helsinki are the biggest single factor in hub and, therefore, the role of the port of the entire hub development is strong. The aim is to look at how the port will develop as a result of changes in the foreign trade of Finland and the Northern European logistics trends in 25 years time period. Work includes the current state analysis and scenario work. The analyses are intended to find out, which trends are the most important in the port volume development. The change and effect of trends is examined through scenarios based on current state. Based on the work, the structure of Finnish export industry and international demand are in the key role in the port volume development. There is significant difference between demands of Finnish exporting products in different export markets and the development between the markets has different impacts on the port volumes by mass and cargo type. On the other hand, the Finnish economy is stuck in a prolonged recession and competition between ports has become a significant factor in the individual port's volume development. Ecological valuesand regulations have changed the competitive landscape and maritime transport emissions reductions has become an important competitive factor for short routes in the Baltic Sea, such as in the link between Helsinki and Tallinn.

Natural freeze crystallization : purification of aqueous Na2SO4 solutions with cold air

The aim of this thesis was to examine efficiency of freeze crystallization and eutectic freeze crystallization in purification of wastewater by imitating natural freezing. In addition, a mathematic model based on heat transfer to determine ice thickness and ice growth rate was examined. Also, the amount of sodium sulfate crystallized at the eutectic point was under investigation. In literature part, advantages and applications of the freeze crystallization are discussed, and possibility to apply it in Northern hemisphere winter weather conditions is under study. Furthermore, main sources of sodium sulfate from Finnish industries are described. The experiments were carried out in modified chest freezer, where a fan was placed in order to obtain laminar air flow inside. Picolog PT-104 data logger was used to monitor temperature changes in the salt-water solution, and constant temperature was maintained in the crystallizer with Lauda RP 850 thermostat. The impurity of formed ice layer was determined by weighing ice samples after experiment and again after 24 hours drying to full dryness in oven. Volume of salt-water solution was also measured after experiment. The highest purity of formed ice layer was obtained with small temperature difference and with long freezing time. On the other hand, the amount of crystallized sodium sulfate was its greatest with long freezing time and higher temperature difference. The results obtained by the mathematic model and empirical results did not differ significantly in most of the experiments. However, the difference increased when salt-water mixture reached its eutectic point, leading to simultaneous ice and salt crystallization. Eutectic point was reached only with the highest salt concentration with one exception. In these cases, calculated values were in many cases greater than the experimental ones. In winter weather conditions freeze crystallization is cost-effective wastewater treatment method and rather simple. Nonetheless, the efficiency and separation rate are strongly depended on ambient temperature and its changes

La flûte enchantée. Ah! l'ingrat par son silence : air de Pamina / Mozart, comp.. Roméo et Juliette. Ah! je veux vivre dans le rêve : valse / Gounod, comp. ; Mme Ritter Ciampi, S ; accompagnement d'orchestre

Comprend : La flûte enchantée ; Roméo et Juliette

Airs de Ballet : Marche, Air gai en rondeau, Tambourins... / Jean-Philippe Rameau, comp. ; Mme Pauline Aubert, clav. ; orchestre sous la direction de M. R. Gerlin

Comprend : Marche / Jean-Philippe Rameau, comp. ; Mme Pauline Aubert, clav. ; orchestre sous la direction de M. R. Gerlin ; Air gai en rondeau / Jean-Philippe Rameau, comp. ; Mme Pauline Aubert, clav. ; orchestre sous la direction de M. R. Gerlin ; Tambourins / Jean-Philippe Rameau, comp. ; Mme Pauline Aubert, clav. ; orchestre sous la direction de M. R. Gerlin ; Menuets / Jean-Philippe Rameau, comp. ; Mme Pauline Aubert, clav. ; orchestre sous la direction de M. R. Gerlin ; Rondeau / Jean-Philippe Rameau, comp. ; Mme Pauline Aubert, clav. ; orchestre sous la direction de M. R. Gerlin ; Air / Jean-Philippe Rameau, comp. ; Mme Pauline Aubert, clav. ; orchestre sous la direction de M. R. Gerlin