The aim of this dissertation was to examine the influence of land cultivation on the genetic variability and genetic population structure of the Neozoen Arion lusitanicus. Arion lusitanicus is a slug, which is spreading quickly in its range. This species has been chosen as it is possible to classify them easily to single plots due to their low mobility and as they are especially exposed to environmental and cultivation influences. Another well known factor in Herl is the age of this quite young population, thus enabling to classify genetic changes to recent working environmental and cultivation influences. To examine small spatial effects on various cultivation systems, ten plots - mostly used for agriculture - have been chosen in the Hunsrück-municipality Herl. Among them were four ecologically and four conventionally cultivated areas with partly varying land development dynamics. Furthermore a waste land of many years and a meadow have been included in the test. Wahlen in Northern Saarland and Belm in South Lower Saxony have been chosen as reference areas. Two fundamentally different PCR-based molecular genetic methods came into operation. The RAPD-analysis (randomly-amplified-polymorphic DNA) and the microsatellite analysis. As microsatellite primer have not been known for A. lusitanicus so far, primer of other mollusc species have been successfully tested. Two microsatellite Loci showed results which were easy to analyse. Thus it was possible to analyse five alleles on 360 individuals. In the RAPD-analysis 94 polymorph marker have been analysed. In a comparison of the conventionally and the biologically cultivated plots no significant differences with regard to the analysed parameter (genetic diversity, genetic distances and population structuring) could be found with either of the two molecular genetic methods. The RAPD-analysis in particular showed a population division in the test area that could come into being due to reduced gene flow and gene drift through environmental-stochastic influences. A part of this population structuring can be explained through "isolation by distance". With "isolation by distance" the similarity between populations decreases with increasing distance. Although a regression analysis could proof a statistically significant connection between the ground height and the genetic diversity of the single samples (p= 0,029), is it difficult to establish functional connections. Nevertheless is it probable that abiotic factors such as temperature, humidity and soil moisture have an influence on mortality and vitality and thus on the genetic structure of slug populations. With regard to the cultivation three slug populations in Herl showed especially low genetic diversities. These were a waste land, a meadow and a plot, which had been uncultivated until the year 2001 ("conv1"). The difference between these three plots and the rest of the agriculturally used areas was significant on the basis of data of both microsatellite sites (Arin1: U-Test, p=0,033; HA-7: p=0,017). In the RAPD-analysis the areas "conv1" and "meadow" showed higher diversities, the area "waste land" lay also on a higher scale with regard to diversity. As 94 Loci have been analysed in the RAPD-analysis, while there were only two sites in the microsatellite analysis, the RAPD-results are more trustworthy. Possibly these results can be interpreted as indication that land cultivation - unaffected by biological or conventional cultivation - is able to have an influence on the genetic diversity of Arion lusitanicus.

Art, seen under the perspective of literature as an independent mode of human articulation, provides decisive motives for Cassirer's Philosophy of Symbolic Forms. The concept of art as a symbolic form opens up two fields of inquiry. On the one hand Cassirer did not actually carry out his intended systematic presentation of art as a symbolic form. On the other hand Cassirer develops his concept of art's autonomy as an indepedent form of grasping the world by conceptually linking (poetic) art with philosophy. The concepts of transformation, reflexion and heterogeneity denote characteristics of the method - not made explicit by Cassirer himself - through the cultural process becomes evident and can be interpreted as a process of becoming as movement toward Being. With the help of Cassirer's line-example it can be shown how this perspective, which manifests itself in the sense-generating force of regarding the world, is already materially given in the mere process of human perception. Language, myth and science, but also art, are different symbolic forms, which in regard to the essential function of perception turn out to be unfaling elements of the whole cultural process. Owing to the ability of the style-function of art to make transparent the performance of the symbol and with that the dynamics of culture, Cassirer in citing Rückert and Kleist can delimit the critical claim from sceptical and dogmatical positions.

The painter Marianne Werefkin (born 1860; died 1938), from the circle of artists known as the Blue Rider (Der Blaue Reiter) in Munich and lifelong companion of Alexej Jawlenskys, lived in Russia and Latvia the first 36 years of her life. She received her artistic education in Moscow and St. Petersburg. Nevertheless the influence of Russian art on her Munich creative phase has been until now been omitted from research literature. Hence it lacks an important basis for the understanding of her creative output. In many respects Marianne Werefkin led the way in bringing the goals of so-called Russian Realism (russischen Realismus) onto another level, one in which the transmission of emotions was seen as a central aspect. The way the pictures of her teacher Ilja Repin had nothing to do with superficial emotion through simple moralistic categorization, but rather the painter demonstrated life's interconnectedness. After a new artistic beginning in Munich Werefkin took out the historical-daily context from her motifs, since, in the spirit of her time, she had recognized that everything visible was illusion. However she made use of actual reality as a repertoire of symbols for her own feelings, representing universal situations and allowing the total picture space to be the bearer of emotions. In that respect she is different from Wassily Kandinsky, who employed abstraction until reference to reality dissolved. Art for Werefkin involved no self-purpose, but should have a positive influence upon the observer. Narrative instruction is pushed to the background through the way it interacts, which depends upon knowledge of psychology and spiritual groups.

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Since the end of the eighties a modern and high-quality medicine is not possible without use of data processing technology and communication technology. The physician manage the enormously big volume of medical data only with the help of computer-assisted information systems. In this regard the work deals with the concept and the construction of an intranet/internet-based radiology information system. The work examine the evaluation of the radiological systems already available on market. After the analysis of relevant qualities of these systems they are measured in demands and criteria, posed before. From discovered disadvantages as for example lacking internet ability, insufficient platform independence, the major tasks of this work will be described. In the first chapter a new concept is suggested for the construction of an intranet/internet-oriented, radiological information system for the transmission and archiving of data in clinics and local physicians implemented in modular structure, producer-independent DICOM-standardization, modern, independent of platform JAVA-technology and Intranet/Internet-technology. The second chapter treats the problems of the medical image compression. After an introducing description of the known compression procedures the difficulties of the compression of the medical images is described.In accordance with these requirements the known lossy and loss-less compression-algorithms are measured. The results of the comparative examinations will get in a representative random check of more than 500 DICOM-images. Two new adaptive compression algorithms are developed by methods suggested in the work of the classification and appreciation of the quality of medical images. The third chapter is dedicated to the implementation of the components of the developed intranet/internet-oriented radiology information system. First the different net communication scenarios for the data exchange between the components of the system on the basis of Java-technology are analyzed and than an own scenario is developed. The software is developed for the visualization and processing of DICOM-image projects. The last section considers the new internet/intranet-oriented radiology information system with whose draft the scientific and practical results of this doctoral thesis were applied.