This work deals with carbon materials and using them in electrochemical energy sources. Object of this work was to prepare carbon materials and investigate their electrical properties. The theoretical part objects of the carbon materials, their properties, application in electrochemical energy sources and measurement methods used in experimental part. Experimental part describes the preparation of the electrodes with various carbon materials and summarizes the results of measurements.

Geographically Albania is divided into two main regions: northern Ghegeria and southern Toskeria. The southern part (Toskeria) consists of two sub-regions, Toske and Laberia. These share many commonalities yet the musical styles of each are distinctly different. The Shkumbini River serves as a boundary between the two main regions, as well as a cultural divide distinguishing the varying musical performances and styles. Monodic music is practiced mainly in the north whilst polyphonic music is most commonly performed in the south. These two diverse systems impact on the folk songs of the two regions making them sound significantly different. In addition, different folk instruments are used in both regions. The instrumental and vocal monodic music of the north (Ghegeria) is based on the modal system, with Dorian, Aeolian, Mixolydian, Phrygian, Lydian, Ionian and Hypolydian modes being used. The songs of the north typically portray important historical events or heroic deeds, while the southern songs are not as nationalistic and cover various social themes. They are in general a lot softer and more melodic in character. The folk music of the south (Toskeria) is based on the pentatonic scale, with significant differences which are noticed within the two sub-regions (Toske and Laberia). The vocal music of the south consists of two, three or four vocal parts singing a capella, although sometimes instrumental accompaniment is added. The polyphonic music of the sub-region of Toske is characterized by imitative elements utilized in both the melodies and rhythms of the songs, providing a sense of thematic unity, whereas in Laberia contrasting elements are more dominant throughout the songs. Despite these differences, iso (or drone) is performed similarly in both sub-regions, and is another important element in the polyphonic music of the south. A notable form of instrumental polyphonic music of Toskeria is that of Kaba, performed by Saze folk ensembles. What distinguishes Albanian polyphonic folk music from its counterparts in other areas of the world is that it has not only survived but is flourishing in modern times. Unlike many other cultures that have excluded polyphonic music from mainstream society, Albanian polyphonic music is known by most Albanians and is well practiced and enjoyed by all age groups, and rural as well as urban Albanians, regardless of their degree of formal musical training / Dissertation (MMus)--University of Pretoria, 2011. / Music / unrestricted

Ordinary concrete is the most commonly used building material, but nowadays the requirements for low energy consumption, durability of structures together with their easy diagnostics as well as ecological production raises. This thesis deals with cement and aluminosilicate composites with content of conductive fillers, which allows to monitor the change in electrical properties, most commonly electrical resistance in dependence on mechanical stress. In the experimental part of the thesis, test beams were produced based on alkali-activated slag with content of carbon nanotubes, graphite powder, carbon black and carbon fibre. The beams were subjected to flexural loading in a three-point bending configuration and the shift in electrical resistance was monitored.

Production of construction materials requires a large amount of energy. That can be decreased by using of waste materials. This thesis deals with the self-sensing properties of composites. It presents electrical properties of building materials and their measurement. In the experimental part, the influence of conductive fillers on the self-sensing properties of aluminosilicate composites was examined. Test cubes were made of alkali-activated slag with a content of graphite powder, carbon black, carbon fibers, steel fibers or carbon nanotubes. The fractional change in resistence during cyclic compressive loading was monitored.