Advanced Surface Movement Guidance and Control Systems (A-SMGCS) help to further improve safety and efficiency of the traffic on the aerodrome surface. The current A-SMGCS sensor technologies have certain operational and functional limitations. A new and unprecedented sensor technology is being tested as a pilot project. This unique sensors is called MagSense®. It works based on the principle of detecting the influence of ferromagnetic materials on earth’s magnetic field. For applications in the aviation environment, learning processes are necessary which are generally based on the graphical depiction of stored sensor data and features to analyze the graphs. For this purpose a visualization and analysis tool is needed. In order to create an adequate tool to allow for depicting stored sensor data and the peaks caused by ferromagnetic objects in aircraft and vehicles, a requirements engineering process will be conducted wherein the requirements of the various stakeholders will be identified and harmonized. In general, the appropriate RE approach will ensure mutual agreement among the stakeholders and a set of requirements for the first edition of the tool without contradictions. The harmonized package of requirements will then be used as the starting point for a software development process, after which the tool will be produced as specified and validated as a part of this Master’s Thesis. This Master’s Thesis puts a special focus on the choice of a suitable method in Requirements Engineering and Requirements Management, adequately adapted to the project size and its quality. The selection of appropriate elements from the methodology as well as the outcomes from applying them on a specific software production project are at the core.

Advanced Surface Movement Guidance and Control Systems (A-SMGCS) help to further improve safety and efficiency of the traffic on the aerodrome surface. The current A-SMGCS sensor technologies have certain operational and functional limitations. A new and unprecedented sensor technology is being tested as a pilot project. This unique sensors is called MagSense®. It works based on the principle of detecting the influence of ferromagnetic materials on earth’s magnetic field. For applications in the aviation environment, learning processes are necessary which are generally based on the graphical depiction of stored sensor data and features to analyze the graphs. For this purpose a visualization and analysis tool is needed. In order to create an adequate tool to allow for depicting stored sensor data and the peaks caused by ferromagnetic objects in aircraft and vehicles, a requirements engineering process will be conducted wherein the requirements of the various stakeholders will be identified and harmonized. In general, the appropriate RE approach will ensure mutual agreement among the stakeholders and a set of requirements for the first edition of the tool without contradictions. The harmonized package of requirements will then be used as the starting point for a software development process, after which the tool will be produced as specified and validated as a part of this Master’s Thesis. This Master’s Thesis puts a special focus on the choice of a suitable method in Requirements Engineering and Requirements Management, adequately adapted to the project size and its quality. The selection of appropriate elements from the methodology as well as the outcomes from applying them on a specific software production project are at the core.

Since the discovery three decades ago, fullerenes as well as metallofullerenes have been extensively investigated. However, almost all known fullerenes follow the classical definition, that is, classic fullerenes are comprised of only pentagons and hexagons. Nowadays, more and more evidence, from both theoretical and experimental studies, suggests that non-classical fullerenes, especially heptagon-containing fullerenes, are important as intermediates in fullerene formation mechanisms. To obtain fundamental understandings of fullerenes and their formation mechanisms, new systematic studies should be undertaken. Although necessary tools, such as isomer generating programs, have been developed for classical fullerenes, none of them are able to solve problems related to non-classical fullerenes. In this thesis, existing theories and algorithms of classical fullerenes are generalized to accommodate non-classical fullerenes. A new program based on these generalized principles is provided for generating non-classical isomers. Along with this program, other tools are also attached for accelerating future investigations of non-classical fullerenes. In addition, research to date is also reviewed. / Master of Science

A family of novel large cage Tb-based TNT-EMFs Tb₃N@C_2n (40 ≤ n ≤ 44), and a family of novel dimetallic endohedral metalloazafullerenes with the molecular formula of M₂@C₇₉N (M=Y, Tb, and La), were for the first time systematically synthesized, isolated, and structurally characterized. The protocol developed in this thesis provides an effective and systematic method for the synthesis, purification, and characterization of TNT-EMFs and other novel EMFs. Structural information about this family of Tb-based TNT-EMFs strongly supports the TNT formation mechanism of TNT-EMFs. It also demonstrates for the first time that EMFs do not necessarily choose an IPR-obeying cage even if the IPR cages are available. At room temperature and in a non-polar organic solvent, the fluorescence of the hydrogenated product of Tb₃N@C₈₀ was for the first time successfully obtained based on the proposed idea: de-shielding the screen effect of the fullerene cage on the metal ions or clusters inside the fullerene cage. The structural characterization of Tb₂@C₇₉N using single crystal X-ray diffraction crystallography demonstrated that the fullerene cage of M₂@C₇₉N is an I_h eighty-atom cage. The presence of the N atom in the molecule was further confirmed by mass spectra of the ¹⁵N labeled samples. ESR data demonstrated that there is a single-electron bond between the two Y atoms in Y₂@C₇₉N molecules. Theoretical calculations showed for the first time that the single-electron bond is low-lying at the HOMO-2 orbital and thereby resulting in a large HOMO-LUMO gap. It is, in fact, this large HOMO-LUMO gap and the low-lying single-electron orbital (hidden at HOMO-2) that are jointly responsible for the stability of M2@C79N. The single-electron bonds are the longest metal-metal bond reported so far. The chromatographic retention behavior of TNT-EMFs was also systematically studied on 5PBB and 5PYE columns. Both experimental and theoretical data demonstrated that the 5PBB column is sensitive to a fullerene's predicted cage size but indifferent to its cage symmetry, while the 5PYE column is more sensitive to the density and distribution of Ï electrons in a fullerene cage. Therefore, the 5PYE column is more suitable for separating structural isomers. The combination of the 5PBB column in the first stage and the 5PYE column in the second provides a highly effective way for isolating specific isomers. / Ph. D.