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2006, European Conference on Non …
2007 •
This paper presents an application of neural networks in pattern recognition of defects in sonic signals from non-destructive evaluation by multichannel impact-echo. The problem approached consists in allocating parallelepiped-shape materials in four levels of classifications defining material condition (homogeneous or defective), kind of defects (holes and cracks), defect orientation, and defect dimension. Various signal features as centroid frequency, attenuation and amplitude of the principal frequency are estimated per channel and processed by PCA and feature selection methods to reduce dimensionality. Results for simulations and experiments applying Radial Basis Function, Multilayer Perceptron and Linear Vector Quantization neural networks are presented. Neural networks obtain good performance in classifying several 3D finite element models and specimens of aluminum alloy.
1994 •
2006 •
Automation in Construction
Ultrasonic signal processing methods for detection of defects in concrete pipes2012 •
2005 •
The use of welded structures is extremely common nowadays. But its inspection deserves care and attention to increase the reliability in these structures.The present work evaluates the application of artificial neural networks for the pattern recognition of ultrasonic signals using the pulse-echo and TOFD (Time of Flight Diffraction) techniques in weld beads. Four conditions of weld bead were evaluated: lack of fusion (LF), lack of penetration (LP), porosity (PO) and non-defect (ND). The defects were intentionally inserted in a weld bead of AISI 1020 steel plates of 20 mm thickness and 300 mm length and were confirmed using radiographic tests. In this study a standard classifier implemented by an artificial neural network of the backpropagation type. The ultrasonic signals acquired from pulse-echo and TOFD were introduced, separately, in the network with and without preprocessing. The preprocessing was only used to smoothen the signal improving the classification. The results obtain...
G. Zabiela (Hrsg.), Prakalbinta priešistorė. Leidinys, skirtas Audronės Bliujienės sukakčiai / Unveiling Prehistory. A Book on the Occasion of Audronė Bliujienė’s Jubilee (Klaipėda 2024)
The hillfort complex of Kraam and Pokirben in Eastern Prussia in the light of archives and modern fieldwork2024 •
The aftermath of the Second World War and its repercussions have had a profound impact on the trajectory of East Prussian archaeology, with archaeological endeavours abruptly halted, and findings seemingly lost or scattered. However, the discovery of significant parts of the Königsberg antiquities collections in Berlin, Kaliningrad, and other European locations unveiled a preserved wealth of knowledge, reconnecting with the longstanding research tradition. Since 2012 a comprehensive project titled "Research Continuity and Continuity Research: Settlement Archaeological Basic Research on the Iron Age in the Baltic" is dealing with the reconstruction of the archaeological knowledge of the German research period in the former province of East Prussia. Collaboratively conducted by archaeologists at the Centre for Baltic and Scandinavian Archaeology (ZBSA) in Schleswig and the Museum of Pre- and Early History (MVF) in Berlin, the project aims to reconstruct settlement history in the Iron Age, bridging the period between 500 BC and 1250 AD. The former German province of East Prussia, now divided among Lithuania, Russia (Kaliningrad region), and Poland, poses unique challenges for the project, necessitating collaboration with relevant state and cultural institutions in these countries. The initiative involves an international scientific advisory board and focuses on cataloguing and making sources accessible for both digital and analogue research, including current field research. The project explores the continuity of settlement processes during the Iron Age, particularly through the examination of hillforts, a prominent monument category in the region. The challenge lies in confirming settlement continuity through primary monuments, as direct evidence of settlements is scarce. The project developed an efficient methodology for investigating hillforts, leading to successful C14-based dating of nine such monuments in the former Kreis Fischhausen/Zelenogradskiĭ raĭon. This provides a nuanced understanding of their occupation phases and their correlation with burial sites. The results challenge previous perspectives and contribute to the re-evaluation of entire settlement chambers. Ongoing collaborations, such as the investigation of Lithuanian hillforts, among others together with Audronė Bliujienė, demonstrate the methods lasting impact and its role in advancing our understanding of settlement dynamics in the Baltic region.
Journal of World Prehistory
Prehistory to History: A New Archaeological Approach to Knowledge Transmission and the Inception of Literacy in Central Europe2024 •
This paper reviews archaeological research on the transmission of writing knowledge between literate and pre-literate societies. It proposes the use of productive approaches, such as cultural epidemiology and cultural attraction theory (CAT). The case study focuses on East-Central Europe and discusses the role of writing in the construction of social group identity and the transition from local communities with a prehistoric mindset to a historically acting society during the first millennium AD. The study collects relevant archaeological records of Early Mediaeval writing and explains them using reflective archaeology. It is shown that interactions between literate and pre-literate societies are highly complex social processes that function not only at the cultural and cognitive levels of individuals but also among larger groups of people. By combining cultural attraction theory with empirical archaeological data, this study formulates a conclusive explanation for the introduction of writing among Europe's Slavic-speaking population.
Open Journal of Earthquake Research
Forecasting the Epicenter Area of a Future Strong Earthquake2024 •
It is clear from the literature data that the geometric characteristics of the seismogenic source are directly related to the nucleation of their strong earthquakes. Our study starts from the observation of the proximity relationship between the epicenter of a strong earthquake and the surface trace of the seismogenic source. The proposed model is based on the mathematical analysis of seismicity falling within an area, through a polynomial function to determine a curve. The experimental results of our model confirm that 97% of the epicenters of strong earthquakes are located near the concavities or at the inflection points of the polynomial curve. Only 3% of strong earthquakes are located at the edges of the analyzed areas, where the number of data is not significant. The proposed model makes it possible to locate, with good approximation, the areas most likely to be the site of future strong earthquakes.
8th International Symposium for Geotechnical Safety & Risk (ISGSR 2022)
The Impact of Spatial Variability on Deep Foundation Design for Tall Buildings2022 •
İBB Kütüphane ve Müzeler Müdürlüğü
Işık Dervişler ve Seyyid Gazi Işıklarının Klasik Türk Edebiyatına Yansımaları2023 •
Revue Tomaine de Philosophie
CLIMBING JACOB'S LADDER: COLLECTIVE ACTION AND HUMILITY IN PHILOSOPHICAL PRACTICE AND PSYCHOTHERAPY2024 •
Silva jrg. 4 nr.3
Een ivoren polsbeschermer uit Bossche bodem (An excavated ivory bracer from 's Hertogenbosch)2023 •
War in History
Keeping the Germans Out of the Straits: The Five Ottoman Dreadnought Thesis Reconsidered2016 •
St. Stephan in Wien. Die "Herzogswerkstatt". Ed. B. Schedl & F. Zehetner, Wien / Köln 2022, pp. 173-187.
Inhabited Architecture. Das Bischofs- und das Singertor an St. Stephan zu Wien und die Figurenportale des 14. JahrhundertsJesús Rodríguez Zepeda
Jesús Rodríguez Zepeda, Estado de derecho y democracia, nueva edición, con nota introductoria. México, INE, 2019.2019 •
Debates em Psiquiatria
Saúde mental em situação de emergência: Covid-192020 •
2023 •
Journal of Constructional Steel Research
A simplified method for assessing the ductile behaviour of stud connectors in composite beams with high strength concrete slab2004 •
Tạp chí Y học Việt Nam
Chẩn Đoán DI Truyền Tiền Làm Tổ Bệnh Thiếu Men GLUCOSE-6-PHOSPHATASE Dehydrogenase (G6PD)2023 •
2014 •