Proboscidea-Homo interactions in open-air localities during the Early and Middle Pleistocene of western Eurasia: a palaeontological and archaeolocigal perspective

In recent years, a significant number of Pleistocene localities with evidence of proboscidean exploita- tion by humans has been discovered, substantial- ly enriching our knowledge on Homo subsistence strategies and megafauna acquisition. In this study, we provide a synthesis of the evidence for Pro- boscidea-Homo interactions in Early and Middle Pleistocene open-air sites of western Eurasia with direct (e.g., presence of cut marks, proboscidean bone artifacts, fractures for marrow extraction) and indirect (e.g., association and refitting of lithic ar- tifacts, use-wear analysis) evidence of exploitation. Sex and ontogenetic age of butchered proboscide- ans are recorded, in order to assess possible human preferences. Furthermore, we investigate the role of large carnivores focusing on important renew- als in the carnivore guilds, and their significance in terms of carrion availability for scavenging and human-carnivore competition for access to food resources. By applying an ecomorphological/be- havioral approach, we examine the large carnivore community structure and dynamics, with empha- sis in the hunting strategies of large predators. Ad- ditionally, we aim to infer their possible role in the changes of early human subsistence strategies fo- cusing on proboscidean acquisition, and to explore the role of humans within the predatory guild. The ecological adaptations of the two common Middle Pleistocene proboscideans in Europe, the Europe- an straight-tusked elephant Palaeoloxodon antiquus and the steppe mammoth Mammuthus trogonthe- rii, are also evaluated. Finally, we discuss various aspects of the Homo bio-cultural evolution during the period under study, including developments in material culture and relevant inferences about hu- man social behavior.The symposium and the volume "Human-elephant interactions: from past to present" were funded by the Volkswagen Foundation

Human-elephant interactions: from past to present

korrigierter Nachdruck, nur Änderungen im ImpressumIn recent decades, a significant number of Pleistocene (ca. 2.6 million years–10,000 years ago) open-air and cave sites yielding elephant or mammoth bones in direct association with hominin remains and/or lithic artifacts have been discovered in Eurasia, Africa and America. Many of them show strong evidence of acquisition and processing of proboscidean carcasses by early humans, leading scientists to interpret them as “elephant butchering sites”. Indeed, proboscidean exploitation by early Homo has been proposed to have been critical for Palaeolithic human lifeways, influencing not only their subsistence, but also other aspects of early human evolution and adaptations. The nature and degree of interactions between humans and elephants comprises an important field in palaeoanthropological studies since decades, but many questions remain still unanswered or partially explored. By bringing together research papers from the fields of Palaeolithic Archaeology, Palaeoanthropology, Palaeontology, Zooarchaeology, Geology, Ethnography and Nutrition Studies, the book systematically covers a diverse array of perspectives on elephant-human interactions across the world from the Pleistocene times until today. The volume includes 19 contributions and is organized into four thematic sections: 1) The Palaeolithic record, 2) A view of the evidence, 3) Elephants in past human nutrition, and 4) Ethnography – Human-elephant interactions in recent Africa. Collectively, the volume not only showcases the current state of knowledge, but also intends to provoke renewed interest for current and further research, and build an interdisciplinary and synthetic understanding of the significance of proboscideans throughout human evolution

Human-elephant interactions from past to present: an introduction

In this introductory chapter of the interdisciplinary volume “Human-elephant interactions: from past to present”, we provide the background and the main questions of the archaeological, paleoanthropological and ethnographic studies that examine this field of ​​research. In addition, we describe the objectives and the thematic sections of the book, and for each section we present the current status of investigations. Finally, we conduct a brief description of the chapters, presenting their subject and their main research results.The symposium and the volume "Human-elephant interactions: from past to present" were funded by the Volkswagen Foundation

Human-elephant interactions: from past to present

In recent decades, a significant number of Pleistocene (ca. 2.6 million years–10,000 years ago) open-air and cave sites yielding elephant or mammoth bones in direct association with hominin remains and/or lithic artifacts have been discovered in Eurasia, Africa and America. Many of them show strong evidence of acquisition and processing of proboscidean carcasses by early humans, leading scientists to interpret them as “elephant butchering sites”. Indeed, proboscidean exploitation by early Homo has been proposed to have been critical for Palaeolithic human lifeways, influencing not only their subsistence, but also other aspects of early human evolution and adaptations. The nature and degree of interactions between humans and elephants comprises an important field in palaeoanthropological studies since decades, but many questions remain still unanswered or partially explored. By bringing together research papers from the fields of Palaeolithic Archaeology, Palaeoanthropology, Palaeontology, Zooarchaeology, Geology, Ethnography and Nutrition Studies, the book systematically covers a diverse array of perspectives on elephant-human interactions across the world from the Pleistocene times until today. The volume includes 19 contributions and is organized into four thematic sections: 1) The Palaeolithic record, 2) A view of the evidence, 3) Elephants in past human nutrition, and 4) Ethnography – Human-elephant interactions in recent Africa. Collectively, the volume not only showcases the current state of knowledge, but also intends to provoke renewed interest for current and further research, and build an interdisciplinary and synthetic understanding of the significance of proboscideans throughout human evolution.The symposium and the volume "Human-elephant interactions: from past to present" were funded by the Volkswagen Foundation

Deep Radial-Basis Value Functions for Continuous Control

A core operation in reinforcement learning (RL) is finding an action that is optimal with respect to a learned value function. This operation is often challenging when the learned value function takes continuous actions as input. We introduce deep radial-basis value functions (RBVFs): value functions learned using a deep network with a radial-basis function (RBF) output layer. We show that the maximum action-value with respect to a deep RBVF can be approximated easily and accurately. Moreover, deep RBVFs can represent any true value function owing to their support for universal function approximation. We extend the standard DQN algorithm to continuous control by endowing the agent with a deep RBVF. We show that the resultant agent, called RBF-DQN, significantly outperforms value-function-only baselines, and is competitive with state-of-the-art actor-critic algorithms.Comment: In Proceedings of the 35th AAAI Conference on Artificial Intelligence (AAAI

Supramolecular assemblies involving metal organic ring interactions: Heterometallic Cu(II)-Ln(III) two dimensional coordination polymers

Three isostructural two-dimensional coordination polymers of the general formula [Ln2(CuL)3(H2O)9]$5.5H2O, where Ln is La (1), Nd (2), and Gd (3), have been synthesized and isolated from aqueous solutions and their single-crystal structures determined by X-ray diffraction. The supramolecular interaction between the non-aromatic metallorings plays an important role in stabilizing the structure of these compounds. The thermal stability, reversible solvent uptake, electronic properties and magnetic studies of these compounds are also reported

Correction: Konidaris et al. Dating of the Lower Pleistocene Vertebrate Site of Tsiotra Vryssi (Mygdonia Basin, Greece): Biochronology, Magnetostratigraphy, and Cosmogenic Radionuclides. Quaternary 2021, 4, 1

Background and scope: The late Villafranchian large mammal age (~2.0–1.2 Ma) of the Early Pleistocene is a crucial interval of time for mammal/hominin migrations and faunal turnovers in western Eurasia. However, an accurate chronological framework for the Balkans and adjacent territories is still missing, preventing pan-European biogeographic correlations and schemes. In this article, we report the first detailed chronological scheme for the late Villafranchian of southeastern Europe through a comprehensive and multidisciplinary dating approach (biochronology, magnetostratigraphy, and cosmogenic radionuclides) of the recently discovered Lower Pleistocene vertebrate site Tsiotra Vryssi (TSR) in the Mygdonia Basin, Greece. Results: The minimum burial ages (1.88 ± 0.16 Ma, 2.10 ± 0.18 Ma, and 1.98 ± 0.18 Ma) provided by the method of cosmogenic radionuclides indicate that the normal magnetic polarity identified below the fossiliferous layer correlates to the Olduvai subchron (1.95–1.78 Ma; C2n). Therefore, an age younger than 1.78 Ma is indicated for the fossiliferous layer, which was deposited during reverse polarity chron C1r. These results are in agreement with the biochronological data, which further point to an upper age limit at ~1.5 Ma. Overall, an age between 1.78 and ~1.5 Ma (i.e., within the first part of the late Villafranchian) is proposed for the TSR fauna. Conclusions: Our results not only provide age constraints for the local mammal faunal succession, thus allowing for a better understanding of faunal changes within the same sedimentary basin, but also contribute to improving correlations on a broader scale, leading to more accurate biogeographic, palaeoecological, and taphonomic interpretations