The atmospheric stable boundary layer: Data analysis and comparison with similarity theories

The objective of this dissertation is to study the structure and behavior of the Atmospheric Boundary Layer (ABL) in stable conditions. This type of boundary layer is not completely well understood yet, although it is very important for many practical uses, from forecast modeling to atmospheric dispersion of pollutants. We analyzed data from the SABLES98 experiment (Stable Atmospheric Boundary Layer Experiment in Spain, 1998), and compared the behaviour of this data using Monin-Obukhov's similarity functions for wind speed and potential temperature. Analyzing the vertical profiles of various variables, in particular the thermal and momentum fluxes, we identified two main contrasting structures describing two different states of the SBL, a traditional and an upside-down boundary layer. We were able to determine the main features of these two states of the boundary layer in terms of vertical profiles of potential temperature and wind speed, turbulent kinetic energy and fluxes, studying the time series and vertical structure of the atmosphere for two separate nights in the dataset, taken as case studies. We also developed an original classification of the SBL, in order to separate the influence of mesoscale phenomena from turbulent behavior, using as parameters the wind speed and the gradient Richardson number. We then compared these two formulations, using the SABLES98 dataset, verifying their validity for different variables (wind speed and potential temperature, and their difference, at different heights) and with different stability parameters (zita or Rg). Despite these two classifications having completely different physical origins, we were able to find some common behavior, in particular under weak stability conditions.

Tradurre il genere documentario : Due proposte di sottotitolaggio del documentario Little Land a confronto

The aim of this thesis is to discuss the main translation issues encountered while performing a double version of the subtitles of the documentary “Little Land” from English into Italian. The main motivation behind my choice is a personal interest in the subtitling field applied to the documentary filmic genre. This project is divided into two parts. The first part constitutes the theoretical basis of the thesis and is divided in three chapters. The first chapter introduces the documentary “Little Land” and analyses its main features and characteristics. The second chapter is devoted to documentary studies and theory of documentary, including the historical overview of the changes of this filmic genre and an overview of its market potential in order to meet both the audience and the director’s requirements. The third chapter deals with audiovisual translation as a discipline, and analyses the main translation techniques adopted for the documentary genre: dubbing, voice-over and subtitling. The subtitling section is particularly rich, and a discussion of the use of double and pivot subtitles and the possibilities of subtitling for accessibility issues is included. The second part constitutes the practical development of the theories introduced and dealt with in the first part. Chapter four provides an overview of the history of the Cineteca di Bologna, for whom I worked as a subtitler, and explains the guide lines and equipment required in order to perform the manual launch of the subtitles during their festival Human Rights Nights. The fifth and final chapter provides an analysis of the second version of the subtitles, meant for TV broadcasting, and highlights the main issues encountered during the translation process, both from a structural and a lexical point of view. A discussion of the different translation strategies adopted is provided, in a constant comparison with the first version of the subtitles. The function of self-reflection and self-observation in translation is also examined. Appendix A and B contain the interviews with “Little Land”’s director and protagonist respectively, Appendix C contains the subtitles table.