During the shift from the Hallstatt to the La Tène period, we can observe through the archaeological record the upcoming importance of iron in the central European Celtic culture. The ample...Show moreDuring the shift from the Hallstatt to the La Tène period, we can observe through the archaeological record the upcoming importance of iron in the central European Celtic culture. The ample discovery of long swords, daggers, spearheads and other sorts of weaponry, suggests a significant value given to these items of war. Lavished burials and large votive deposits in water-bodies such as the renowned lake of La Tène, provide us with an ever growing record. When we zoom in on the Celtic long sword, we can observe an interesting commonly found feature, namely punch marks. These are small, round marks occurring on the blade of some of the long swords and can be found as single marks, sometimes two, or occasionally even three marks on a single blade. Recurring themes on these punchmarks are animals which were more often depicted in the Celtic world. Interestingly, zoomorphic marks only represent boars, birds, horses or bulls, yet considering the large range of animals that were included in La Tène art, there must have been a specific meaning linked to these animals. For the larger part, these animals have a clear explanation as to why they are depicted on these items of warfare; the boars for their ferocity and violence, the horses for their use in combat, and the bulls for their strength and impressive stature. When we look at birds, the scavenger birds such as ravens were renowned for their pitilessness and them being the scavengers of war. However, when we look at the six known bird-like punch marks, we can identify three of them as being scavenger birds, and three of them as being a waterbird-like species. In this research, I will be solely focusing on three punch marks, which are situated on swords found in Ilbesheim, Heuchelheim and La Tène, and I will attempt to establish a clear linkage between the symbols and warfare. The observed fact that there are waterbird-like symbols on swords, raises the question what the linkage between waterbirds and warfare could be, and if we are actually able to attempt to give meaning to their symbolism. Hence, my main question arose, i.e. can a clear linkage between the Celtic waterbird imagery and warfare be established through the use of contextual analysis of similar Celtic waterbird imagery? And if I cannot establish a clear linkage to warfare, are there any other linkages that can be made?Show less
The recent popularization of machine learning as a new paradigm in computer science provides interesting opportunities for explaining phenomena of collective motion in living systems, as for...Show moreThe recent popularization of machine learning as a new paradigm in computer science provides interesting opportunities for explaining phenomena of collective motion in living systems, as for example flocks of birds or schools of fish. In this thesis we develop a model for collective motion using multi-agent reinforcement learning with orientation-based rewards, a new type of reward system that has not yet been found in literature. While the developed model is in principle generally applicable to all forms of collective motion observed in nature, we use the language of the flocking behaviour of birds as a particular example to frame our model. The birds have the option to either fly into an instinctive direction or act based on a Viscek-type of interaction with their neighbors, and are rewarded maximally when the resulting direction of movement is some predetermined prefered direction. The model distinghuishes between leaders that instinctively move towards this direction and followers that do not. We show that collective motion into this prefered direction emerges from this model, but only with a minimum of 1.23 encounters with neighbours on average, of which a minimal fraction of 0.2 should be leaders, which on average roughly corresponds to at least one encounter with a leader every four timesteps. These lower bounds are rudimentary estimates, as the present study serves mainly as a proof of concept that collective motion can emerge from this new type of model. Additionally it is suggested that, using deep reinforcement learning, this model can be viewed as a reinforcement learning extension of the Vicsek model.Show less
The Palaeolithic locality Schöningen (Germany) is known particularly well for its magnificently preserved hominin crafted spears and the remains of large mammals with traces of butchering and...Show moreThe Palaeolithic locality Schöningen (Germany) is known particularly well for its magnificently preserved hominin crafted spears and the remains of large mammals with traces of butchering and marrow exploitation. The Palaeolithic sites in the Schöningen area yielded also several other find categories such as botanical remains, fish, amphibians, reptiles and birds. This thesis reports on the investigation of the avian remains from Schö 13 II-4, the site where they found the wooden spears. Most (≥70%) of the bird remains are from that site. For the identification of the bird remains three different comparison collections as well as the literature have been consulted. At least five species have been identified; four different ducks and a member of the Phasianidae family. The avian assemblage seems to have natural origins; there are no distinctive anthropogenic marks on the bones and the quantity of the elements is one to be expected after a natural death. The avian fauna does not contradict previous palaeoenvironmental reconstructions i.e. the occurrence of open water, temperate climate conditions and a somewhat sheltered type of vegetation.Show less
The rescue-excavation at the open-cast mine in Schöningen started in 1982. Circa 25.000 faunal remains have been excavated since that moment. These remains have been identified as large mammal...Show moreThe rescue-excavation at the open-cast mine in Schöningen started in 1982. Circa 25.000 faunal remains have been excavated since that moment. These remains have been identified as large mammal remains, small mammals, fish, mollusks, amphibians and reptiles. However the category birds is missing. Circa 167 bird bones and several egg shells were present in the layers Schöningen 13 II-2, 13 II-3 and 13 II-4. Besides the identification of the bird remains, the bones are also checked for modification marks made by the hominins who occupied Schöningen. Also the bones are compared to other archaeological sites to compare the data from Schönignen withShow less
