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184 results on '"Lamparter, Steffen"'

1. On Event-Driven Knowledge Graph Completion in Digital Factories

Author

Ringsquandl, Martin, Kharlamov, Evgeny, Stepanova, Daria, Lamparter, Steffen, Lepratti, Raffaello, Horrocks, Ian, and Kröger, Peer

Subjects
Computer Science - Machine Learning, Computer Science - Artificial Intelligence
Abstract

Smart factories are equipped with machines that can sense their manufacturing environments, interact with each other, and control production processes. Smooth operation of such factories requires that the machines and engineering personnel that conduct their monitoring and diagnostics share a detailed common industrial knowledge about the factory, e.g., in the form of knowledge graphs. Creation and maintenance of such knowledge is expensive and requires automation. In this work we show how machine learning that is specifically tailored towards industrial applications can help in knowledge graph completion. In particular, we show how knowledge completion can benefit from event logs that are common in smart factories. We evaluate this on the knowledge graph from a real world-inspired smart factory with encouraging results.

Published
2021
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2. Towards Analytics Aware Ontology Based Access to Static and Streaming Data (Extended Version)

Author

Kharlamov, Evgeny, Kotidis, Yannis, Mailis, Theofilos, Neuenstadt, Christian, Nikolaou, Charalampos, Özcep, Özgür, Svingos, Christoforos, Zheleznyakov, Dmitriy, Brandt, Sebastian, Horrocks, Ian, Ioannidis, Yannis, Lamparter, Steffen, and Möller, Ralf

Subjects
Computer Science - Artificial Intelligence, Computer Science - Databases
Abstract

Real-time analytics that requires integration and aggregation of heterogeneous and distributed streaming and static data is a typical task in many industrial scenarios such as diagnostics of turbines in Siemens. OBDA approach has a great potential to facilitate such tasks; however, it has a number of limitations in dealing with analytics that restrict its use in important industrial applications. Based on our experience with Siemens, we argue that in order to overcome those limitations OBDA should be extended and become analytics, source, and cost aware. In this work we propose such an extension. In particular, we propose an ontology, mapping, and query language for OBDA, where aggregate and other analytical functions are first class citizens. Moreover, we develop query optimisation techniques that allow to efficiently process analytical tasks over static and streaming data. We implement our approach in a system and evaluate our system with Siemens turbine data.

Published
2016

3. Context-Aware Analytics in MOM Applications

Author

Ringsquandl, Martin, Lamparter, Steffen, and Lepratti, Raffaello

Subjects
Computer Science - Artificial Intelligence
Abstract

Manufacturing Operations Management (MOM) systems are complex in the sense that they integrate data from heterogeneous systems inside the automation pyramid. The need for context-aware analytics arises from the dynamics of these systems that influence data generation and hamper comparability of analytics, especially predictive models (e.g. predictive maintenance), where concept drift affects application of these models in the future. Recently, an increasing amount of research has been directed towards data integration using semantic context models. Manual construction of such context models is an elaborate and error-prone task. Therefore, we pose the challenge to apply combinations of knowledge extraction techniques in the domain of analytics in MOM, which comprises the scope of data integration within Product Life-cycle Management (PLM), Enterprise Resource Planning (ERP), and Manufacturing Execution Systems (MES). We describe motivations, technological challenges and show benefits of context-aware analytics, which leverage from and regard the interconnectedness of semantic context data. Our example scenario shows the need for distribution and effective change tracking of context information., Comment: ARCOE-Logic 2014 Workshop Notes, pp. 44-49

Published
2014

4. Validation of SHACL Constraints over KGs with OWL 2 QL Ontologies via Rewriting

Author

Savković, Ognjen, Kharlamov, Evgeny, Lamparter, Steffen, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Hitzler, Pascal, editor, Fernández, Miriam, editor, Janowicz, Krzysztof, editor, Zaveri, Amrapali, editor, Gray, Alasdair J.G., editor, Lopez, Vanessa, editor, Haller, Armin, editor, and Hammar, Karl, editor

Published
2019
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6. Event-Enhanced Learning for KG Completion

Author

Ringsquandl, Martin, Kharlamov, Evgeny, Stepanova, Daria, Hildebrandt, Marcel, Lamparter, Steffen, Lepratti, Raffaello, Horrocks, Ian, Kröger, Peer, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Weikum, Gerhard, Series Editor, Gangemi, Aldo, editor, Navigli, Roberto, editor, Vidal, Maria-Esther, editor, Hitzler, Pascal, editor, Troncy, Raphaël, editor, Hollink, Laura, editor, Tordai, Anna, editor, and Alam, Mehwish, editor

Published
2018
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7. Knowledge Fusion of Manufacturing Operations Data Using Representation Learning

Author

Ringsquandl, Martin, Lamparter, Steffen, Lepratti, Raffaello, Kröger, Peer, Rannenberg, Kai, Editor-in-chief, Sakarovitch, Jacques, Series editor, Goedicke, Michael, Series editor, Tatnall, Arthur, Series editor, Neuhold, Erich J., Series editor, Pras, Aiko, Series editor, Tröltzsch, Fredi, Series editor, Pries-Heje, Jan, Series editor, Whitehouse, Diane, Series editor, Reis, Ricardo, Series editor, Furnell, Steven, Series editor, Furbach, Ulrich, Series editor, Winckler, Marco, Series editor, Rauterberg, Matthias, Series editor, Lödding, Hermann, editor, Riedel, Ralph, editor, Thoben, Klaus-Dieter, editor, von Cieminski, Gregor, editor, and Kiritsis, Dimitris, editor

Published
2017
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8. Semantic access to streaming and static data at Siemens

Author

Kharlamov, Evgeny, Mailis, Theofilos, Mehdi, Gulnar, Neuenstadt, Christian, Özçep, Özgür, Roshchin, Mikhail, Solomakhina, Nina, Soylu, Ahmet, Svingos, Christoforos, Brandt, Sebastian, Giese, Martin, Ioannidis, Yannis, Lamparter, Steffen, Möller, Ralf, Kotidis, Yannis, and Waaler, Arild

Published
2017
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9. Capturing Industrial Information Models with Ontologies and Constraints

Author

Kharlamov, Evgeny, Grau, Bernardo Cuenca, Jiménez-Ruiz, Ernesto, Lamparter, Steffen, Mehdi, Gulnar, Ringsquandl, Martin, Nenov, Yavor, Grimm, Stephan, Roshchin, Mikhail, Horrocks, Ian, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Groth, Paul, editor, Simperl, Elena, editor, Gray, Alasdair, editor, Sabou, Marta, editor, Krötzsch, Markus, editor, Lecue, Freddy, editor, Flöck, Fabian, editor, and Gil, Yolanda, editor

Published
2016
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10. Towards Analytics Aware Ontology Based Access to Static and Streaming Data

Author

Kharlamov, Evgeny, Kotidis, Yannis, Mailis, Theofilos, Neuenstadt, Christian, Nikolaou, Charalampos, Özçep, Özgür, Svingos, Christoforos, Zheleznyakov, Dmitriy, Brandt, Sebastian, Horrocks, Ian, Ioannidis, Yannis, Lamparter, Steffen, Möller, Ralf, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Groth, Paul, editor, Simperl, Elena, editor, Gray, Alasdair, editor, Sabou, Marta, editor, Krötzsch, Markus, editor, Lecue, Freddy, editor, Flöck, Fabian, editor, and Gil, Yolanda, editor

Published
2016
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11. Semantic-Guided Feature Selection for Industrial Automation Systems

Author

Ringsquandl, Martin, Lamparter, Steffen, Brandt, Sebastian, Hubauer, Thomas, Lepratti, Raffaello, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Arenas, Marcelo, editor, Corcho, Oscar, editor, Simperl, Elena, editor, Strohmaier, Markus, editor, d'Aquin, Mathieu, editor, Srinivas, Kavitha, editor, Groth, Paul, editor, Dumontier, Michel, editor, Heflin, Jeff, editor, Thirunarayan, Krishnaprasad, editor, and Staab, Steffen, editor

Published
2015
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15. How Semantic Technologies Can Enhance Data Access at Siemens Energy

Author

Kharlamov, Evgeny, Solomakhina, Nina, Özçep, Özgür Lütfü, Zheleznyakov, Dmitriy, Hubauer, Thomas, Lamparter, Steffen, Roshchin, Mikhail, Soylu, Ahmet, Watson, Stuart, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Mika, Peter, editor, Tudorache, Tania, editor, Bernstein, Abraham, editor, Welty, Chris, editor, Knoblock, Craig, editor, Vrandečić, Denny, editor, Groth, Paul, editor, Noy, Natasha, editor, Janowicz, Krzysztof, editor, and Goble, Carole, editor

Published
2014
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20. Efficient Identification of Energy-Optimal Switching and Operating Sequences for Modular Factory Automation Systems

Author

Mechs, Sebastian, Lamparter, Steffen, Peschke, Jörn, Müller, Jörg P., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Ali, Moonis, editor, Bosse, Tibor, editor, Hindriks, Koen V., editor, Hoogendoorn, Mark, editor, Jonker, Catholijn M., editor, and Treur, Jan, editor

Published
2013
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22. Event-Enhanced Learning for KG Completion

Author

Ringsquandl, Martin, primary, Kharlamov, Evgeny, additional, Stepanova, Daria, additional, Hildebrandt, Marcel, additional, Lamparter, Steffen, additional, Lepratti, Raffaello, additional, Horrocks, Ian, additional, and Kröger, Peer, additional

Published
2018
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24. Personalization Using Ontologies and Rules

Author

Tran, Thanh, Wang, Haofen, Lamparter, Steffen, Cimiano, Philipp, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Nejdl, Wolfgang, editor, Kay, Judy, editor, Pu, Pearl, editor, and Herder, Eelco, editor

Published
2008
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25. Formation of Service Value Networks for Decentralized Service Provisioning

Author

Speiser, Sebastian, Blau, Benjamin, Lamparter, Steffen, Tai, Stefan, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Bouguettaya, Athman, editor, Krueger, Ingolf, editor, and Margaria, Tiziana, editor

Published
2008
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27. Semantic Management of Web Services

Author

Oberle, Daniel, Lamparter, Steffen, Eberhart, Andreas, Staab, Steffen, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Benatallah, Boualem, editor, Casati, Fabio, editor, and Traverso, Paolo, editor

Published
2005
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28. Knowledge Extraction from Classification Schemas

Author

Lamparter, Steffen, Ehrig, Marc, Tempich, Christoph, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Meersman, Robert, editor, and Tari, Zahir, editor

Published
2004
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30. Impact of the COVID-19 pandemic on cardiovascular mortality and catherization activity during the lockdown in central Germany: an observational study

Author

Nef, Holger M., Elsässer, Albrecht, Möllmann, Helge, Abdel-Hadi, Mohammed, Bauer, Timm, Brück, Martin, Eggebrecht, Holger, Ehrlich, Joachim R., Ferrari, Markus W., Fichtlscherer, Stephan, Hink, Ulrich, Hölschermann, Hans, Kacapor, Rifat, Koeth, Oliver, Korboukov, Serguei, Lamparter, Steffen, Laspoulas, Alexander J., Lehmann, Ralf, Liebetrau, Christoph, Plücker, Tobias, Pons-Kühnemann, Jörn, Schächinger, Volker, Schieffer, Bernhard, Schott, Peter, Schulze, Matthias, Teupe, Claudius, Vasa-Nicotera, Mariuca, Weber, Michael, Weinbrenner, Christoph, Werner, Gerald, Hamm, Christian W., Dörr, Oliver, and Justus Liebig University Giessen

Subjects
Male, Cardiac Catheterization, Acute coronary syndrome, medicine.medical_specialty, Time Factors, Cardiovascular mortality, medicine.medical_treatment, Chronic coronary syndrome, 030204 cardiovascular system & hematology, Rate ratio, 03 medical and health sciences, Percutaneous Coronary Intervention, 0302 clinical medicine, Risk Factors, Cause of Death, Germany, Internal medicine, Pandemic, Humans, Medicine, Hospital Mortality, 030212 general & internal medicine, SARS-CoV2 pandemic, Aged, Cause of death, Cardiac catheterization, ddc:610, Original Paper, business.industry, COVID-19, Percutaneous coronary intervention, General Medicine, Middle Aged, medicine.disease, Confidence interval, Hospitalization, Cardiovascular Diseases, Emergency medicine, Cardiology, Female, Observational study, Cardiology and Cardiovascular Medicine, business
Abstract

Aims During the COVID-19 pandemic, hospital admissions for cardiac care have declined. However, effects on mortality are unclear. Thus, we sought to evaluate the impact of the lockdown period in central Germany on overall and cardiovascular deaths. Simultaneously we looked at catheterization activities in the same region. Methods and results Data from 22 of 24 public health-authorities in central Germany were aggregated during the pandemic related lockdown period and compared to the same time period in 2019. Information on the total number of deaths and causes of death, including cardiovascular mortality, were collected. Additionally, we compared rates of hospitalization (n = 5178) for chronic coronary syndrome (CCS), acute coronary syndrome (ACS), and out of hospital cardiac arrest (OHCA) in 26 hospitals in this area. Data on 5,984 deaths occurring between March 23, 2020 and April 26, 2020 were evaluated. In comparison to the reference non-pandemic period in 2019 (deaths: n = 5832), there was a non-significant increase in all-cause mortality of 2.6% [incidence rate ratio (IRR) 1.03, 95% confidence interval (CI) 0.99–1.06; p = 0.16]. Cardiovascular and cardiac mortality increased significantly by 7.6% (IRR 1.08, 95%-CI 1.01–1.14; p = 0.02) and by 11.8% (IRR 1.12, 95%-CI 1.05–1.19; p Conclusion During the COVID-19-related lockdown a significant increase in cardiovascular mortality was observed in central Germany, whereas catherization activities were reduced. The mechanisms underlying both of these observations should be investigated further in order to better understand the effects of a pandemic-related lockdown and social-distancing restrictions on cardiovascular care and mortality. Graphic abstract

Published
2020
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49. An Ontology-Mediated Analytics-Aware Approach to Support Monitoring and Diagnostics of Static and Streaming Data

Author

Kharlamov, Evgeny, primary, Kotidis, Yannis, additional, Mailis, Theofilos, additional, Neuenstadt, Christian, additional, Nikolaou, Charalampos, additional, Ozcep, Ozgur, additional, Christoforos Svingos, Christoforos, additional, Zheleznyakov, Dmitriy, additional, Ioannidis, Yannis, additional, Lamparter, Steffen, additional, and Moller, Ralf, additional

Published
2019
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50. Impact of the COVID-19 pandemic on cardiovascular mortality and catherization activity during the lockdown in central Germany: an observational study.

Author

Nef, Holger M., Elsässer, Albrecht, Möllmann, Helge, Abdel-Hadi, Mohammed, Bauer, Timm, Brück, Martin, Eggebrecht, Holger, Ehrlich, Joachim R., Ferrari, Markus W., Fichtlscherer, Stephan, Hink, Ulrich, Hölschermann, Hans, Kacapor, Rifat, Koeth, Oliver, Korboukov, Serguei, Lamparter, Steffen, Laspoulas, Alexander J., Lehmann, Ralf, Liebetrau, Christoph, and Plücker, Tobias

Abstract

Aims: During the COVID-19 pandemic, hospital admissions for cardiac care have declined. However, effects on mortality are unclear. Thus, we sought to evaluate the impact of the lockdown period in central Germany on overall and cardiovascular deaths. Simultaneously we looked at catheterization activities in the same region. Methods and results: Data from 22 of 24 public health-authorities in central Germany were aggregated during the pandemic related lockdown period and compared to the same time period in 2019. Information on the total number of deaths and causes of death, including cardiovascular mortality, were collected. Additionally, we compared rates of hospitalization (n = 5178) for chronic coronary syndrome (CCS), acute coronary syndrome (ACS), and out of hospital cardiac arrest (OHCA) in 26 hospitals in this area. Data on 5,984 deaths occurring between March 23, 2020 and April 26, 2020 were evaluated. In comparison to the reference non-pandemic period in 2019 (deaths: n = 5832), there was a non-significant increase in all-cause mortality of 2.6% [incidence rate ratio (IRR) 1.03, 95% confidence interval (CI) 0.99–1.06; p = 0.16]. Cardiovascular and cardiac mortality increased significantly by 7.6% (IRR 1.08, 95%-CI 1.01–1.14; p = 0.02) and by 11.8% (IRR 1.12, 95%-CI 1.05–1.19; p < 0.001), respectively. During the same period, our data revealed a drop in cardiac catherization procedures. Conclusion: During the COVID-19-related lockdown a significant increase in cardiovascular mortality was observed in central Germany, whereas catherization activities were reduced. The mechanisms underlying both of these observations should be investigated further in order to better understand the effects of a pandemic-related lockdown and social-distancing restrictions on cardiovascular care and mortality. [ABSTRACT FROM AUTHOR]

Published
2021
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