Alquannis 9. Panorama general de los graffiti murales y de los grabados al aire libre medievales y post-medievales en Aragón: Paralelos y divergencias. 2002. Alquannis 9. Overview of graffiti murals and medieval and post-medieval rock engravings in Aragon: Parallels and divergences. 2002

The analysis of findings in the area of Kryvyi Rih metallurgy center shows a number of identical features in the forms and decorations of Dnipro variant of Sabatynivka culture items, which brings them closer to the items of Loboikivka type of Berezhnivsko-Maivska Zrubna culture and Kardashynka types of Bilohrudivka and Bilozerka cultures. It reflects their genetic connection as well as co-existence in the region which served as the contact area. Therefore it is possible that although Kryvyi Rih ore massif was under the control of Sabatynivka people, it also served as the raw basis of bronze production for their northern and eastern neighbors. Keywords: Late Bronze Age, Kryvyi Rih metallurgy center Sabatynivka culture, casting foundries, hoards

The extended representation of the water management problem as an important component of the supply of resources in an effective regional economy is vital. This article justifies the importance of such a representation through the prism of the paired strategizing of the water resource system and regional economic development. The purpose of this article is to analyse the rationality of the usage of water resources in conjunction with regional socio-economic development indicators, by applying tools that allow grouping based on the existing trends in water consumption. This article studies the importance of the effective management of the allocation of scarce water resources among users. It also examines the rationality of their usage in the context of optimising resource usage. The article studies high variations across areas based on the potential of the resource components, as well as the dynamic socio-economic indicators. The theoretical framework of the rational water usage paradigm comprises a set of interrelated concepts and theories, such as the theory of economic growth, as well as theories and concepts of regional development, particularly regional resource management, considering the parameters of current and proposed mesoeconomic policies in combination with the basin approach for the allocation of water resources. It has been shown that the gross regional product (GRP) water intensity indicator is one of the important criteria in assessing the rational usage of territorial water resources. Our hypothesis is that regional peculiarities in the changes in the tendencies of the GRP water intensity indicator allows not only to define the current situation pertaining to water usage, but to also determine the direction of the control actions to increase the efficiency of water usage. In our study, this hypothesis is confirmed. Unlike other existing approaches and models, which are oriented chiefly towards the identification of scarce water resource allocation options in accordance with water usage standards, this article implements an approach to the assessment of efficiency of water usage as a strategic resource for socio-economic development at the regional level. Based on the analysis of the GRP water intensity indicator and the problematic nature of region grouping from the standpoint of rational water use, regions are identified. The results of this study can serve as a guide for designing regional development strategies.

INLAID BUCKLES AND PLATES FROM THE GREAT MIGRATION PERIOD SHOWING RELIEF SCROLL DECORATIONS: BYZANTIUM AND BARBARICUM This article examines the inlaid artefacts with garnets decorated with carved spirals, which originate from Kerch and date from the late stage of the Great Migration Period. According to B. Arrhenius, carved gemstones occurring in Europe in the Hunnic and Post-Hunnic Periods were the products of Mediterranean workshops, primarily of Constantinople. This stone-working technology requires specific skills; the barbarians did not have this technology in the period in question. The finds from Kerch were possibly imported from Constantinople, as the Cimmerian Bosporos was closely connected with the Eastern Roman Empire in political and economic respect. However, it is still possible that the artefacts featuring the carved designs in question were produced in the Western Mediterranean workshops. The first thing to meet the eye is the appearance of a significant number of metal ware showing comparable spiral decorations in the Barbaricum in the said period. The artefacts showing the most similar style concentrated in Eastern Europe; there also are the finds of the kind from Central Europe and southern Scandinavia. It is very likely that metal objects with spiral decorations, prestigious in themselves and in some cases undoubtedly originated from “chieftain” complexes or the centres of power, imitated even more prestigious artefacts featuring carved garnets, like those found in Kerch. If it was the case, the Central European and Scandinavian finds possibly imitated not only Byzantine ware, but also certain ornaments from the Western Mediterranean, for example from Ravenna. Bethat as it may, it seems that the rather wide distribution of metal artefacts featuring twoscroll spiral decorations indicates a significant influence of the elite Mediterranean / Byzantine culture on the barbarian elite, which also occurred in other elements of the “princely” civilization of the European Barbaricum in the fifth and sixth centuries.

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Small RNAs present in bovine ejaculate can be linked to sperm abnormalities and fertility disorders. At present, quality parameters routinely used in semen evaluation are not fully reliable to predict bull fertility. In order to provide additional quality measurements for cryopreserved semen used for breeding, a method based on deep sequencing of sperm microRNA (miRNA) and Piwi-interacting RNA (piRNA) from individual bulls was developed. To validate our method, two populations of spermatozoa isolated from high and low motile fractions separated by Percoll were sequenced, and their small RNAs content characterized. Sperm cells from frozen thawed semen samples of 4 bulls were successfully separated in two fractions. We identified 83 miRNAs and 79 putative piRNAs clusters that were differentially expressed in both fractions. Gene pathways targeted by 40 known differentially expressed miRNAs were related to apoptosis. Dysregulation of miR-17-5p, miR-26a-5p, miR-486-5p, miR-122-5p, miR-1...

Boglehead investing, founded on the principles of John C. Bogle is one of the classic time tested long term, low cost, and passive investment strategy. This paper uses various machine learning methods, and fundamental stock data in order to predict whether or not a stock would incur negative returns next year, and suggests a loss averted bogle-head strategy to invest in all stocks which are expected to not give negative returns over the next year. Results reveal that XGBoost, out of the 44 models trained, has the highest classification metrics for this task. Furthermore, this paper shall use various machine learning methods for exploratory data analysis, and SHAP values reveal that Net Income Margin, ROA, Gross Profit Margin and EBIT are some of the most important factors for this. Also, based on the SHAP values it is interesting to note that the current year has negligible contribution to the final prediction. Investors can use this as a heuristic guide for loss averted long term (1-year) stock portfolios.

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