TY - CHAP A1 - Raptis, Georgios T1 - Die Konzepte und Mechanismen der elektronischen Gesundheitskarte und des Heilberufsausweises aus der Sicht der Datensicherheit / des Datenschutzes BT - Vortrag T2 - Forschungsseminar med. Informatik an der Universität Heidelberg, 22.06.2006 KW - Elektronische Gesundheitskarte KW - Heilberuf KW - Ausweis KW - Datenschutz KW - Datensicherheit Y1 - 2005 ER - TY - GEN A1 - Raptis, Georgios T1 - Ist die Sicherheit der medizinischen Daten in der Telematik-Infrastruktur zu gewährleisten? BT - Vortrag an der Universität Heidelberg, Kolloquium Wissenschaftlichkeit in der Medizin, 10.05.2007 T2 - Kolloquium Wissenschaftlichkeit in der Medizin, Universität Heidelberg, 10.05.2007 KW - Telemedizin KW - Datensicherheit Y1 - 2007 ER - TY - CHAP A1 - Markus Rütten, A1 - Krenkel, Lars A1 - Kessler, Roland T1 - Secondary Flow Effects as Physical Mechanism of Molecular Species Transport in Highly Oscillating Generic-Trachea Flows T2 - 83rd Annual Scientific Conference of the International Association of Applied Mathematics and Mechanics, 26.-30. März 2012, Darmstadt, Germany N2 - The high frequency oscillation artificial respiration technique is often the last hope for patients to survive highly damaged lung tissue. The mortality can significantly be reduced. In comparison to conventional artificial respiration the applied volume flow rate and pressure is significantly lowered in order to avoid further damaging of lung tissue and remaining intact alveolae. However, the physical mechanism of transport of oxygen to the aeriols under high frequency oscillation is not well understood. In the upper part of the lung convection is dominant, in contrast, the gas exchange in the lower parts of the lung is mainly driven by diffusion. It is not clear how associated gradients of concentrations of different molecular species are then achieved. Highly oscillating fluid flows has been a long research topic in fluid dynamics. It is known that oscillating pressure fluctuations are able to induce secondary flows, in particular, in curved ducts and pipes. The question is, whether the trachea enforces the generation of secondary flow by its kidney like cross section geometry. The influence of molecular species of different densities onto the formation of secondary flows and the convectional transport within the trachea is investigated. In order to clarify the physical mechanisms behind flow simulations have been conducted by using state of the art CFD techniques. KW - CFD KW - Generic-Trachea Flows Y1 - 2012 UR - https://elib.dlr.de/75733/ ER - TY - CHAP A1 - Friedrich, Janet A1 - Feldmann, Daniel A1 - Krenkel, Lars A1 - Wagner, Claus A1 - Schreiber, Laura Maria T1 - 19F Gas Flow Measurement of C3F7H During Constant Flow and High Frequency Oscillatory Ventilation T2 - Discovery, innovation & application - advancing mr for improved health : ISMRM 21st Annual Meeting & Exhibition ; SMRT 22nd Annual Meeting Salt Lake City, Utah, USA 20-26 April 2013 N2 - The aim of the current study is the development of MRI methods that enable the investigation of gas flow mechanisms during high frequency oscillatory ventilation. This work includes flow measurements during three constant flows (19.9, 30.6 and 41.4 L min-1) and the comparison to direct numerical simulations (DNS) using a second-order-acurate finite-volume method and to data measured with a volume flow meter. 19F-MRI, DNS and flow meter data are in good agreement. Flow measurements during HFOV of 4 Hz were successfully performed and velocity profiles could be recorded at different phases of the ventilation cycle. Y1 - 2013 UR - https://archive.ismrm.org/2013/1482.html VL - 21 ER - TY - JOUR A1 - Horn, Lars-Christian A1 - Raptis, Georgios A1 - Fischer, Uta A1 - Bilek, Karin T1 - Standardised handling of hysterectomy specimen in cervical cancer – report of over 900 stage pT1b1- to pT2b-tumors JF - Pathology - Research and Practice KW - Gebärmutterhalskrebs KW - Chirurgie KW - Gewebe KW - Gebärmutterentfernung Y1 - 2000 VL - 196 SP - 450 ER - TY - JOUR A1 - Horn, Lars-Christian A1 - Raptis, Georgios A1 - Fischer, Uta A1 - Bilek, Karin T1 - Impact of tumorload in surgically treated, histologically staged early cervical cancer: Multivariate analysis of 568 patients JF - International Journal of Gynecology & Obstetrics KW - Gebärmutterhalskrebs KW - Chirurgie KW - Tumorklasifikation Y1 - 2000 VL - 70 IS - Suppl. 1 SP - 20 EP - 21 ER - TY - JOUR A1 - Horn, Lars-Christian A1 - Raptis, Georgios A1 - Fischer, Uta A1 - Bilek, Karin T1 - p53-tumorsuppressor gene in surgically treated histologically staged early cervical cancer JF - International Journal of Gynecology & Obstetrics KW - Tumorsuppressor-Gen KW - Chirurgie KW - Histopathologie KW - Gebärmutterhalskrebs Y1 - 2000 VL - 70 IS - Suppl. 1 SP - 112 ER - TY - JOUR A1 - Schenkel, Johannes A1 - Albert, Jürgen A1 - Raptis, Georgios A1 - Butz, Norbert T1 - Notfalldatensatz: Bessere Unterstützung für den Arzt JF - Deutsches Ärzteblatt KW - Elektronische Gesundheitskarte KW - Notfallmedizin Y1 - 2011 UR - https://www.aerzteblatt.de/pdf.asp?id=89546 VL - 108 IS - 19 SP - A-1046, B-864, C-864 ER - TY - JOUR A1 - Horn, Lars-Christian A1 - Raptis, Georgios A1 - Martin, Rosemarie T1 - Tumorassoziierte Proteolyse, p53-Immunhistochemie und Zelladhäsion bei primär operierten Zervixkarzinomen JF - Geburtshilfe und Frauenheilkunde KW - Tumorassoziierte Proteolyse KW - Immuncytochemie KW - Zelladhäsion KW - Gebärmutterhalskrebs Y1 - 2000 VL - 60 IS - Suppl. 1 SP - 200 ER - TY - JOUR A1 - Schenkel, Johannes A1 - Albert, Jürgen A1 - Raptis, Georgios A1 - Butz, Norbert ED - Duesberg, Felix T1 - Notfalldatenmanagement auf der elektronischen Gesundheitskarte JF - e-Health KW - Elektronische Gesundheitskarte KW - Notfallmedizin Y1 - 2012 SP - 64 EP - 67 PB - medical future verlag CY - Solingen ER - TY - CHAP A1 - Raptis, Georgios T1 - Notfalldaten und Datenerhalt mit der elektronischen Gesundheitskarte. T2 - Tagungsband 22. Smartcard-Workshop 2012 KW - Elektronische Gesundheitskarte KW - Notfallmedizin KW - Datensicherung Y1 - 2012 SP - 166 PB - Fraunhofer-Verlag ER - TY - GEN A1 - Raptis, Georgios T1 - Biometrie - Anwendungen und Datenschutz. Welche Zusatzinformationen liefert der IRIS-Pförtner? Nebennutzen in einem biometrischen Zugangskontrollsystem. Medizinische Hintergründe. Symposium des Bundesamtes für Sicherheit in der Informationstechnik, Vortrag, Darmstadt 23. Mai 2002 BT - Vortrag, Darmstadt 23. Mai 2002 T2 - Symposium des Bundesamtes für Sicherheit in der Informationstechnik Y1 - 2002 ER - TY - JOUR A1 - Lekakis, J. A1 - Nanas, J. A1 - Prassopoulos, V. A1 - Raptis, Georgios T1 - Cardiac I-123 metaiodobenzylguanidine uptake in predicting early and late mortality in patients with congestive heart failure JF - Circulation (Suppl.) KW - Stauungssuffizienz KW - Radiologische Diagnostik KW - Prognose Y1 - 1997 VL - 96 IS - 8 SP - 2104 ER - TY - JOUR A1 - Horn, Lars-Christian A1 - Fischer, Uta A1 - Tannapfel, A. A1 - Kuhn, H. A1 - Hänel, C. A1 - Raptis, Georgios T1 - The role of p53 tumorsuppressorgene in tumor progression in cervical cancer JF - Pathology - Research and Practice KW - Tumorsuppressor-Gen KW - Tumorwachstum KW - Gebärmutterhalskrebs Y1 - 1999 VL - 195 SP - 328 ER - TY - RPRT A1 - Schenkel, Johannes A1 - Albert, Jürgen A1 - Raptis, Georgios T1 - Arbeitskonzept Notfalldatenmanagement KW - Elektronische Gesundheitskarte KW - Notfallmedizin Y1 - 2011 UR - www.bundesaerztekammer.de/downloads/Arbeitskonzept_NFDM_1.051.pdf ER - TY - THES A1 - Raptis, Georgios T1 - Vertraulichkeit von medizinischen Daten in der Telematik-Infrastruktur - Sicherheitsanalyse unter Berücksichtigung von Aspekten der langfristigen Sicherheit KW - Medizinische Dokumentation KW - Telekommunikation KW - Datensicherheit Y1 - 2008 CY - Heidelberg ER - TY - GEN A1 - Raptis, Georgios T1 - Mechanismen und Einsatzkonzepte von Heilberufsausweis und elektronischer Gesundheitskarte BT - Vortrag T2 - Oberseminar im Fachbereich Informatik, Kryptographie und Computeralgebra der TU-Darmstadt, 28.11.2006 KW - Elektronische Gesundheitskarte KW - Heilberuf KW - Ausweis Y1 - 2006 ER - TY - JOUR A1 - Höh, H. A1 - Gamael, A. A1 - Raptis, Georgios T1 - Energie und Phakozeit bei Ultraschall und Laserphakoemulsifikation JF - Klinische Monatsblätter für Augenheilkunde KW - Phakoemulsifikation KW - Ultraschall Y1 - 2000 VL - 217 IS - Suppl. 8 SP - 5 ER - TY - GEN A1 - Raptis, Georgios T1 - Einsatzmöglichkeiten des elektronischen Heilberufsausweises BT - Vortrag im Rahmen des CAST-Forums, Fraunhofer IGD, 14.09.2006 T2 - CAST-Forums, Fraunhofer IGD, 14.09.2006 KW - Heilberuf KW - Ausweis Y1 - 2006 ER - TY - JOUR A1 - Hornberger, Helga A1 - Marquis, Peter M. A1 - Christiansen, Silke H. A1 - Strunk, Horst P. T1 - Microstructure of a high strength alumina glass composite JF - Journal of Materials Research N2 - The morphology and microstructure of an Al2O3 glass composite (trade name In-Ceram, Vita Zahnfabrik) were studied using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The composite was produced by infiltration of a lanthanum-based glass throughout a porous Al2O3 body. This alumina body was formed by three classes of particles differing in size and shape: faceted particles typically ≤4 μm in diameter, platelets of average diameter 8 μm, 1.5 μm thickness, and small spheres 0.4 μm in diameter. The outstanding strength properties of the composite (600 MPa, ball-on-ring test) are a result of the high wetting capability of the glass phase on the Al2O3 surface. In addition, plastic strain relaxation in the faceted particles by dislocation formation compensates partially for residual stresses and impedes crack formation at the glass/Al2O3 interface. Y1 - 1996 U6 - https://doi.org/10.1557/JMR.1996.0104 VL - 11 IS - 4 SP - 855 EP - 858 ER - TY - PAT A1 - Hornberger, Helga A1 - Thiel, Norbert A1 - Vollmann, Markus T1 - Fully ceramic tooth replacement with a frame made of cer-stabilised zircon-oxide N2 - Vollkeramischer Zahnersatz mit einem Gerüst, das aus einem Gerüstmaterial aus einem Cer-stabilisierten Zirkonoxid (Ce-ZrO2) mit einem Anteil von bis zu 25 Gew% Aluminiumoxid (Al2O3) bezogen auf den Anteil an ZrO2 aufgebaut ist und einem Infiltrationsglasanteil im Gerüst von 0-40 Vol% bezogen auf das Volumen des Gerüsts sowie einer auf das Gerüstmaterial abgestimmten Verblendkeramik.Die Erfindung betrifft die Verwendung von cer-stabilisiertem ZrO2 zur Herstellung von Gerüstmaterialien, die als Restauration im Dentalbereich einsetzbar sind. T2 - Vollkeramischer Zahnersatz mit einem Gerüst aus einem cer-stabilisierten Zirkonoxid Y1 - 2002 UR - https://depatisnet.dpma.de/DepatisNet/depatisnet?action=bibdat&docid=WO002002047616A3 ER - TY - JOUR A1 - Gebhardt, F. A1 - Seuss, Sigrid A1 - Turhan, Metehan C. A1 - Hornberger, Helga A1 - Virtanen, Sannakaisa A1 - Boccaccini, Aldo R. T1 - Characterization of electrophoretic chitosan coatings on stainless steel JF - Materials Letters N2 - Electrophoretic chitosan deposits on stainless steel AISI 316 L were produced and characterized. The coating quality (thickness, defectiveness, corrosion protection ability) was seen to depend on the electric field used for EPD. Corrosion studies in concentrated simulated body fluid (SBF5) demonstrated that the surface characteristics of AISI 316 L can be positively influenced by the chitosan coating. KW - Chitosan KW - Electrophoretic deposition KW - Biomaterials KW - Electrochemistry Y1 - 2012 U6 - https://doi.org/10.1016/j.matlet.2011.08.088 VL - 66 IS - 1 SP - 302 EP - 304 ER - TY - PAT A1 - Aechtner, Stefan A1 - Hornberger, Helga A1 - Nagel, Emil A1 - Thiel, Norbert T1 - Composite material and method for the preparation thereof N2 - A composite material with a porous inorganic-nonmetallic matrix and a second material, characterized in that said porous inorganic-nonmetallic matrix has a bending strength of >=40 MPa as measured according to ISO 6 872; said second material is an organic material which at least partly fills the pores of said porous matrix; and said composite material has a modulus of elasticity, E, of >=25 GPa as measured according to ISO 10 477. Y1 - 2001 UR - https://depatisnet.dpma.de/DepatisNet/depatisnet?action=bibdat&docid=US020090001623A1 ER - TY - PAT A1 - Muerrle, Ulrich A1 - Hornberger, Helga T1 - Method of making a ceramic restoration N2 - Production of a dental reconstruction comprises: (a) forming a mold (12) from a model (10); (b) using (12) to make an isotropically heat-expandable replica from a ceramic precursor (14); (c) oxidizing (14) to produce an enlarged ceramic replica; (d) forming a silicone mold from this replica; (e) using (d) to make a second ceramic replica; and (f) sintering the second replica with volume reduction to form a replica identical to (10). T2 - Verfahren zur Herstellung einer Zahnrestauration aus Keramik Y1 - 2003 UR - https://depatisnet.dpma.de/DepatisNet/depatisnet?action=bibdat&docid=EP000001346702A1 ER - TY - JOUR A1 - Hornberger, Helga A1 - Marquis, Peter M. A1 - Franks, J. T1 - The impact of diamond-like coatings on the strength of dental ceramics JF - Journal of Dental Research Y1 - 1995 VL - 74 SP - 522 ER - TY - JOUR A1 - Hornberger, Helga A1 - Marquis, Peter M. T1 - Mechanical properties and microstructure of In-Ceram BT - a ceramic-glass composite for dental crowns JF - Glastechnische Berichte - Glass Science and Technology Y1 - 1995 VL - 68 IS - 6 SP - 188 EP - 194 ER - TY - JOUR A1 - Manaranche, Claire A1 - Hornberger, Helga T1 - A proposal for the classification of precious dental alloys according to their resistance to corrosion based on the iso 10271 standard JF - European Cells and Materials N2 - A lot of dental alloys are available on the market. Among these alloys, there are the conventional alloys, the so called casting alloys used without ceramics, the bonding alloys used with high fusing ceramics and the universal alloys used without or with low fusing ceramics. It is im portant to know the physical and mechanical properties of these materials but also their biocompatibility and their resistance to corrosion. Dental alloys are generally placed in the mouth for many years, they must not induce adverse biological reactions such as gingival swelling and erythema, mucosal pain and lichenoid reactions. Although these troubles are often caused not by the materials itself (1, 2), they can be induced by the metallic ions released during their corrosion. In order to decrease the risks to the health, it is necessary to study the corrosion of the dental alloys. Currently, the ISO 10271 Standard (3), describes 3 different corrosion tests: a static immersion test (chemical corrosion), an electrochemic al test and a tarnish test. However, there are no indications yet about the possible interpretation of test results. In this paper, we propose a method to compare and classify the dental alloys in relation to their chemical and electrochemical corrosion results. METHODS: The material tested are pure metals such as gold, palladium, silver, copper and zinc as well as dental alloys which are commercially sold (see Table 1). 54 different materials have been tested. A minimum of four samples of each material were tested by electrochemic al corrosio n and a minimum of three in chemical test. The samples were cast and prepared as indicated by the manufacturer and by the ISO 10271. For the electrochemical test, the samples are in the form of disks 11 mm in diameter. They are tested with a potentiostat/galvanostat Voltalab Model 21. For the chemical test, the samples are rectangular with the dimensions 35X10X1.7 mm. The solution used and the operating conditions are described in the ISO 10271. The concentration of metallic ions released is measured by Induced Coupled Plasma Y1 - 2003 UR - https://www.researchgate.net/publication/242728857_A_proposal_for_the_classification_of_precious_dental_alloys_according_to_their_resistance_to_corrosion_based_on_the_ISO_10271_standard VL - 5 IS - SUPPL. 1 SP - 34 EP - 36 PB - Univ. of Wales CY - Aberystwyth, Wales ER - TY - JOUR A1 - Hornberger, Helga A1 - Weissmann, R. A1 - Lutz, N. T1 - Machining of silica glasses using excimer laser radiation JF - Glastechnische Berichte - Glass Science and Technology Y1 - 1996 VL - 69 IS - 2 SP - 44 EP - 49 ER - TY - JOUR A1 - Wessely, Rainer A1 - Hausleiter, Jörg A1 - Michaelis, Cornelia A1 - Jaschke, Birgit A1 - Vogeser, Michael A1 - Milz, Stefan A1 - Behnisch, Boris A1 - Schratzenstaller, Thomas A1 - Renke-Gluszko, Magdalena A1 - Stöver, Michael A1 - Wintermantel, Erich A1 - Kastrati, Adnan A1 - Schömig, Albert T1 - Inhibition of neointima formation by a novel drug-eluting stent system that allows for dose-adjustable, multiple, and on-site stent coating JF - Arteriosclerosis, Thrombosis, and Vascular Biology N2 - Objective The risk of in-stent restenosis can be considerably reduced by stents eluting cytostatic compounds. We created a novel drug-eluting stent system that includes several new features in the rapidly evolving field of stent-based drug delivery. Methods and Results The aim of the present study was the preclinical evaluation of a stent-coating system permitting individual, on-site coating of stents with a unique microporous surface allowing for individualizable, dose-adjustable, and multiple coatings with identical or various compounds, designated ISAR (individualizable drug-eluting stent system to abrogate restenosis). Stents were coated with 0.75% rapamycin solution, and high-performance liquid chromatography (HPLC)-based determination of drug release profile indicated drug release for >21 days. Rapamycin-eluting microporous (REMP) stents implanted in porcine coronary arteries were safe. To determine the efficacy of REMP stents, this novel drug-eluting stent platform was compared with the standard sirolimus-eluting stent. At 30 days, in-stent neointima formation in porcine coronary arteries was similar in both groups, yielding a significant decrease of neointimal area and injury-dependent neointimal thickness compared with bare-metal stents. Conclusion The ISAR drug-eluting stent platform as a novel concept for stent coating allows for a safe, effective, on-site stent coating process, thus justifying further clinical evaluation to decrease in-stent restenosis in humans. In-stent neointima formation can be successfully attenuated by drug-eluting stents. We introduce a novel conceptual approach for stent-coating that allows for dose-adjustable, on-site stent coating process if desired with multiple compounds. Microporous stents coated with rapamycin proved safe and effective for the limitation of neointima formation in a porcine coronary stent model. KW - drug-eluting stent KW - stent platform KW - sirolimus KW - rapamycin Y1 - 2005 U6 - https://doi.org/10.1161/01.ATV.0000157579.52566.ee SN - 1524-4636 VL - 25 IS - 4 SP - 748 EP - 753 ER - TY - JOUR A1 - Hausleiter, Jörg A1 - Kastrati, Adnan A1 - Wessely, Rainer A1 - Dibra, Alban A1 - Mehilli, Julinda A1 - Schratzenstaller, Thomas A1 - Graf, Isolde A1 - Renke-Gluszko, Magdalena A1 - Behnisch, Boris A1 - Dirschinger, Josef A1 - Wintermantel, Erich A1 - Schömig, Albert T1 - Prevention of restenosis by a novel drug-eluting stent system with a dose-adjustable, polymer-free, on-site stent coating JF - European Heart Journal - Clinical research N2 - Aims Drug-eluting stents (DES) represent a major advance in interventional cardiology. Along with the success shown, current DES also present limitations related to the presence of polymer-coating, fixed drug, and dose used. With the ISAR (Individualized Drug-Eluting Stent System to Abrogate Restenosis) project, a DES system has been developed that permits individualized choice of the drug and dose to use for the given patient. The objective of this prospective dose finding study was to assess the feasibility, safety, and efficacy of a polymer-free on-site stent coating with increasing rapamycin doses. Methods and results In this dose finding study, 602 patients were sequentially enrolled in four groups: microporous bare metal stent (BMS), DES stents coated with a 0.5, 1.0, and 2.0% rapamycin solution. The angiographic in-segment restenosis rate at follow-up angiography was the primary study endpoint. In-segment restenosis was significantly reduced from 25.9% with BMS to 18.9, 17.2, and 14.7% with 0.5, 1.0, and 2.0% rapamycin-eluting stents, respectively (P=0.024). Similarly, the need for target lesion revascularization at 1 year follow-up was reduced from 21.5% with BMS to 16.4, 12.6, and 8.8% with 0.5, 1.0, and 2.0% rapamycin-eluting stents, respectively (P=0.006). Conclusion The placement of polymer-free stents coated on-site with rapamycin is feasible and safe. Furthermore, a dose-dependent efficacy in restenosis prevention is achievable with this new DES concept. KW - Restenosis KW - Stents KW - Randomized KW - Rapamycin KW - Polymer Y1 - 2005 U6 - https://doi.org/10.1093/eurheartj/ehi405 VL - 26 IS - 15 SP - 1475 EP - 1481 ER - TY - CHAP A1 - Weber, Karsten T1 - Der Preis der Informationsfreiheit T2 - Wissen und Bildung in der modernen Gesellschaft Y1 - 2005 UR - https://www.hg-graebe.de/Texte/RLKonf-2005/weber-05-1.pdf PB - Rosa-Luxemburg-Stiftung e.V. CY - Leipzig ER - TY - CHAP A1 - Meyer-Sickendiek, Burkhard A1 - Hussein, Hussein A1 - Baumann, Timo ED - Berton, André ED - Haiber, Udo ED - Minker, Wolfgang T1 - Recognizing Modern Sound Poetry with LSTM Networks T2 - Proceedings of Elektronische Sprachsignalverarbeitung (ESSV) N2 - Our paper focuses on the computational analysis of “readout poetry” (german: Hördichtung) – recordings of poets reading their own work – with regards to the most important type of this genre, the modern “sound poetry” (german: Lautdichtung). Whereas “readout poetry” often uses normal words and sentences, the “sound poetry”, developed by dadaistic poets like Hugo Ball and Kurt Schwitters or concrete poets like Ernst Jandl, Oskar Pastior, or Bob Cobbing, combines the “microparticles of the human voice” like the segments in Ernst Jandls sound poem “schtzngrmm” (“schtzngrmm / schtzngrmm / tttt / tttt / grrrmmmmm / tttt / sch / tzngrmm”). Within the genre of sound poetry, there are two main forms: The lettristic and the syllabic decomposition. A short anecdote will explain this difference: The dadaist Raoul Hausmann developed the lettristic sound poetry in his early dadaistic poem “fmsbw” from 1918. This is said to have inspired his successor Schwitters, whose famous “Ursonate” [The Sonata in Primal Speech] begins with the words “Fümms bö wö tää zää Uu”. With the “Ursonate”, Schwitters developed a syllabic variation of the lettristic poems of Hausmann. The paper shows how to train a bidirectional LSTM network in order to differ between these “dadaistic” sound poems and the “normal” read out poems. In a further step, we will also show how to distinguish between the lettristic and the syllabic decomposition. Based on a bidirectional LSTM network that reads encodings of the character sequence in the poem and uses the output of each directional layer, we identify poems of the sound poetry genre and differentiate between its two types of compositions. The classification results of sound poetry vs. other poetry as well as lettristic vs. syllabic decomposition are with a high performance, yielding a f-scores of 0.86 and 0.84, respectively. KW - Sprachverarbeitung Y1 - 2018 UR - http://www.essv.de/paper.php?id=407 SN - 978-3-959081-28-3 SP - 192 EP - 199 PB - TUDpress CY - Ulm, Germany ER - TY - CHAP A1 - Laumer, Tobias A1 - Schmidt, Michael A1 - Stichel, Thomas T1 - Correlation Analysis of Different Building Parameters on the Part Properties of Parts Built by Simultaneous Laser Beam Melting of Polymers T2 - Fraunhofer Direct Digital Manufacturing Conference DDMC 2016 : Conference Proceedings, March 2016, Berlin N2 - Simultaneous Laser Beam Melting of polymers (SLBM) allows the generation of multi-material components,consisting of different thermoplastic polymers, within one additive building process. Besides the common advantagesof conventional Laser Beam Melting (LBM), multi-material components built by SLBM can fulfill different productrequirements like different chemical resistances or haptic material properties within a single part. To achieve suchparts, different powder materials are deposited next to each other and preheated a few degrees below their meltingtemperatures by infrared emitters and laser radiation (λ = 10.60 μm), before in the last step the preheated powdersare molten simultaneously by an additional laser source (λ = 1.94 μm). In this paper, different polymer powders likepolypropylene (PP) and polyamide 12 (PA12) are used for the generation of multi-material specimens. By varyingdifferent building parameters according to a specified design of experiments, their influence on the part properties isanalyzed. Important building parameters are the intensity and the irradiation time of the laser beam used for meltingthe preheated powders. Besides using tensile tests to determine the tensile strength and the elongation at break, theaverage part height in dependence of the energy input is analyzed. The overall aim is to specify the correlationbetween different building parameters regarding the energy deposition on the resulting part properties. Y1 - 2016 UR - https://www.researchgate.net/publication/298791419_Correlation_Analysis_of_Different_Building_Parameters_on_the_Part_Properties_of_Parts_Built_by_Simultaneous_Laser_Beam_Melting_of_Polymers PB - Fraunhofer Verlag ER - TY - CHAP A1 - Laumer, Tobias A1 - Stichel, Thomas A1 - Bock, Thomas A1 - Amend, Philipp A1 - Schmidt, Michael T1 - Characterization of temperature-dependent optical material properties of polymer powders T2 - AIP Conference Proceedings N2 - In former works, the optical material properties of different polymer powders used for Laser Beam Melting (LBM) at room temperature have been analyzed. With a measurement setup using two integration spheres, it was shown that the optical material properties of polymer powders differ significantly due to multiple reflections within the powder compared to solid bodies of the same material. Additionally, the absorption behavior of the single particles shows an important influence on the overall optical material properties, especially the reflectance of the powder bed. Now the setup is modified to allow measurements at higher temperatures. Because crystalline areas of semi-crystalline thermoplastics are mainly responsible for the absorption of the laser radiation, the influence of the temperature increase on the overall optical material properties is analyzed. As material, conventional polyamide 12 and polypropylene as new polymer powder material, is used. By comparing results at room temperature and at higher temperatures towards the melting point, the temperature-dependent optical material properties and their influence on the beam-matter interaction during the process are discussed. It is shown that the phase transition during melting leads to significant changes of the optical material properties of the analyzed powders. KW - laser beam melting KW - material qualification KW - Optical Material Properties KW - Polymers Y1 - 2014 U6 - https://doi.org/10.1063/1.4918508 IS - 1 PB - AIP Publishing ER - TY - JOUR A1 - Laumer, Tobias A1 - Stichel, Thomas A1 - Raths, Max A1 - Schmidt, Michael T1 - Analysis of the Influence of Different Flowability on Part Characteristics Regarding the Simultaneous Laser Beam Melting of Polymers JF - Physics Procedia N2 - Powder based Additive Manufacturing technologies offer huge potential for building parts with almost no geometrical restrictions, but both the process controlling as well as the part properties are strongly dependent on different material characteristics of the material, like the flowability. In this work, different weight percentages of nano-scaled silica dioxide particles (Aerosil®) are admixed to pure polyethylene and polypropylene powder and the resulting flowability is determined. Besides using the Hausner ratio as standardized value, the degree of coverage is introduced as a new characteristic to quantify the powder flowability. The degrees of coverage are compared to the Hausner ratios to allow a discussion and evaluation about the different characteristic values. Additionally, tensile bars consisting of polypropylene are generated to determine the porosity by cross sections and the mechanical part properties by tensile testing. As mechanical part properties, the tensile strength and elongation at break are determined and the effects of different powder flowability on these properties are analyzed. KW - additive manufacturing KW - laser beam melting of polymers KW - material qualification Y1 - 2016 U6 - https://doi.org/10.1016/j.phpro.2016.08.098 SN - 1875-3892 SN - 1875-3884 VL - 83 SP - 937 EP - 946 PB - Elsevier ER - TY - JOUR A1 - Stichel, Thomas A1 - Frick, Thomas A1 - Laumer, Tobias A1 - Tenner, Felix A1 - Hausotte, Tino A1 - Merklein, Marion A1 - Schmidt, Michael T1 - A Round Robin study for selective laser sintering of polymers: Back tracing of the pore morphology to the process parameters JF - Journal of Materials Processing Technology N2 - The mechanical properties of polymer parts built by Selective Laser Sintering are strongly related to the internal microstructure which differs with the applied production parameters. The paper focuses on the back tracing of the pore morphology of laser sintered polyamide-12 samples to the process parameters. Therefore, a data base is used which is supplied by a Round Robin initiative and includes mechanical tensile tests and the microstructural analysis of the pore morphology of several different sample charges built with different machines. The pore morphologies (porosity, pore density, pore shape and pore arrangement) measured by X-ray computed tomography are compared and discussed regarding the employed parameters and the resulting mechanical properties. The investigations point out that pore density is a superior indicator than porosity for mechanical issues. This is especially valid along the build direction since pore morphology has shown to be strongly anisotropic. Moreover, the analysis revealed that pore density is strongly affected by the process temperature, which is proved to be essential for the fabrication of mechanical robust parts using Selective Laser Sintering. Y1 - 2018 U6 - https://doi.org/10.1016/j.jmatprotec.2017.10.013 VL - 252 IS - February SP - 537 EP - 545 PB - Elsevier ER - TY - JOUR A1 - Pfingsten, Andrea T1 - Genauigkeit des Lachman Tests zur Feststellung einer Ruptur des vorderen Kreuzbandes BT - Ein systematischer Review über Metaanalysen der letzten fünf Jahre JF - pt - Zeitschrift für Physiotherapeuten N2 - Die Ruptur des vorderen Kreuzbandes (ACL, anterior cruciate ligament) ist die häufigste Bandverletzung des Kniegelenks und kann zu schwerwiegenden Folgen führen. Um diese im Rahmen einer Behandlung oder eines Forschungsprojektes manuell zu diagnostizieren, werden geeignete Assessments benötigt. Der vorliegende systematische Review stellt die vorhandene Evidenz des Lachman-Tests als diagnostisches Verfahren zur Feststellung einer ACL-Ruptur dar. Y1 - 2009 SN - 1614-0397 VL - 61 IS - 2 SP - 108 EP - 123 PB - Pflaum CY - München ER - TY - JOUR A1 - Pfingsten, Andrea A1 - Trickes, Claudia A1 - Max, Susanne A1 - Borgetto, Bernhard T1 - Die Forschungspyramide. Ein Modell zur Bewertung der Evidenz durch Zusammenführung verschiedener Forschungsansätze in einem systematischen Review JF - pt - Zeitschrift für Physiotherapeuten Y1 - 2011 SN - 1614-0397 VL - 63 IS - 10 SP - 16 EP - 18 PB - Pflaum CY - München ER - TY - JOUR A1 - Pfingsten, Andrea T1 - Untersuchung des vorderen Kreuzbandes. Indikation, Ausführung und Interpretation des Lachman-Tests im Rahmen der Befunderhebung des Kniegelenks JF - pt - Zeitschrift für Physiotherapeuten Y1 - 2009 SN - 1614-0397 VL - 61 IS - 2 SP - 38 EP - 40 PB - Pflaum CY - München ER - TY - JOUR A1 - Pfingsten, Andrea T1 - Bewertung der Gesamtevidenz in Reviews. Kombination beobachtender und experimenteller Studien JF - pt - Zeitschrift für Physiotherapeuten Y1 - 2011 SN - 1614-0397 VL - 63 IS - 12 SP - 18 EP - 20 PB - Pflaum CY - München ER - TY - CHAP A1 - Grunow, Dieter A1 - Pfingsten, Andrea A1 - Borgetto, Bernhard ED - Hurrelmann, Klaus ED - Laaser, Ulrich ED - Razum, Oliver T1 - Selbsthilfe T2 - Handbuch Gesundheitswissenschaften Y1 - 2012 SN - 978-3-7799-3857-6 PB - Juventa Verlag CY - Weinheim, München ET - 5. Auflage ER - TY - CHAP A1 - Steffens, Oliver A1 - Suhrke, Michael A1 - Rössler, Ulrich ED - Kramer, Bernhard T1 - Ground state and collective excitations of quantum dots: Correlation effects and Hund’s rule in magnetic field T2 - Advances in Solid State Physics N2 - We review ground-state properties and collective excitations of semiconductor quantum dots in a magnetic field obtained from current-spin density-functional theory. Due to exchange-correlation, a generalized Hund’s rule in magnetic field can be established which leads to spin alignment in partially occupied energy shells at the Fermi energy. This results, in distinct spin structures in single-electron addition spectra. Current-dependent exchange-correlation modifies the magnetic-field dependence of the ground state configuration and leads to deviations from plain spin-density calculations. Moreover it gives rise to spontaneous current textures at zero magnetic field. Collective excitation spectra, explicitly calculated for inelastic light scattering, exhibit novel features in their magnetic field dependence due to a finite ground-state spin density. KW - Spin Density KW - Fermi Energy KW - Collective Excitation KW - Addition Spectrum KW - Inelastic Light Scattering Y1 - 1999 SN - 978-3-540-44553-1 U6 - https://doi.org/10.1007/BFb0107469 VL - 39 SP - 111 EP - 120 PB - Friedr. Vieweg & Sohn CY - Braunschweig ER - TY - CHAP A1 - Görtler, Michael ED - Görtler, Michael ED - Lotz, Mathias ED - Partetzke, Marc ED - Poma, Sara Poma ED - Winckler, Marie T1 - Herausforderungen einer kritischen politischen Bildung T2 - Kritische politische Bildung: Standpunkte und Perspektiven N2 - In der politischen Bildung wird die Debatte um eine kritische politische Bildung erneut geführt. Im Fokus der Debattenbeiträge stehen unterschiedliche Vorstellungen hinsichtlich Notwendigkeit, Begründung, Ziele, Inhalte und Methoden einer kritischen politischen Bildung im schulischen wie außerschulischen Bereich. Dieser Band zeigt unterschiedliche Standpunkte und Forschungsperspektiven auf, wie sie diesbezüglich auf der GPJE-Nachwuchstagung im Frühjahr 2016 an der Universität Bremen diskutiert worden sind. Der Band gliedert sich in drei Teile. Der erste umfasst theoretische wie konzeptionelle Beiträge. Im zweiten Teil steht die empirische Forschung im Mittelpunkt. Im dritten Teil werden schließlich die politisch-bildnerische Praxis und deren Reflexion thematisiert. Insgesamt werfen die Beiträge einen differenzierten Blick auf die Debatte um den Gehalt einer kritischen politischen Bildung. Dabei setzen sich die Autorinnen und Autoren mit Argumenten aus der aktuellen Diskussion auseinander und beleuchten blinde Flecken. KW - Diskurs KW - Perspektive KW - Politische Bildung KW - Standort Y1 - 2017 SN - 978-3-7344-0420-7 SP - 123 EP - 135 PB - Wochenschau Verl. CY - Schwalbach/Ts. ER - TY - JOUR A1 - Borrmann, André A1 - Schorr, Markus A1 - Obergrießer, Mathias A1 - Ji, Yang A1 - Wu, I-Chen A1 - Günthner, Willibald A. A1 - Euringer, Thomas A1 - Rank, Ernst ED - Caldas, Carlos H. ED - O'Brien, William J. T1 - Using product data management systems for civil engineering projects - Potentials and obstacles JF - Computing in civil engineering : proceedings of the 2009 ASCE International Workshop on Computing in Civil Engineering ; June 24 - 27, 2009, Austin, Texas Y1 - 2009 VL - 346 SP - 359 EP - 369 PB - ASCE ER - TY - JOUR A1 - Görtler, Michael T1 - Politische Erwachsenenbildung und Zeit JF - Zeitschrift für Weiterbildungsforschung (ZfW) N2 - Der Beitrag fokussiert die Bedeutung von Zeit für die politische Erwachsenenbildung. Angesichts aktueller soziokultureller und sozioökonomischer Herausforderungen - besonders: der Ökonomisierung und Beschleunigung im Kontext von Bildung und Lernen - ergeben sich eine ganze Reihe von drängenden Zeitfragen. Der Bedeutung von Zeit wird in der Erwachsenenbildung und der Politischen Bildung jedoch bisher wenig Aufmerksamkeit geschenkt. Aus diesem Grund wird diese Fragestellung im Beitrag vertieft. Erstens werden die Situation der politischen Erwachsenenbildung und zweitens der Forschungsstand untersucht. Ausgehend von den Befunden werden drittens drei Zugänge herausgearbeitet, welche die Bedeutung von Zeit für die politische Erwachsenenbildung sichtbar machen: Politische Bildung als Prozess und Verzögerung sowie Zeit als Gegenstand, um die Zeitlichkeit von Gesellschaft und Politik zu verstehen und zu beurteilen, um sich an der Gestaltung der Zeitstrukturen zu beteiligen. Der Beitrag endet mit einem Ausblick und offenen Fragen, die sich an die zeittheoretischen Überlegungen anschließen. The article focusses on the importance of time for the political adult education. Current socio-cultural and socio-economic challenges – in particular: the commodification and acceleration in the context of education and learning – results in a wide range of pressing time issues. However the adult education und the political education pay little attention to the importance of time. For this reason, this issue will be deepened in the article. First, the situation of the political adult education and secondly, the state of research are examined. On the base of the findings, three approaches are pointed out, which emphasize the importance of time for the political adult education: political education as a process and as a deceleration and also as a subject to understand and judge the temporality of politics and society as a necessary condition to participate in shaping the time structures. The paper ends with an outlook and open-ended questions, which adjoin the time theoretical considerations. KW - Acceleration KW - Adult education KW - Forschungsbericht KW - Lernen KW - Political education KW - Politische Erwachsenenbildung KW - Time Y1 - 2016 U6 - https://doi.org/10.1007/s40955-016-0052-2 IS - 1 SP - 9 EP - 25 PB - Springer ER - TY - JOUR A1 - Görtler, Michael T1 - Migration als Herausforderung der politischen Bildung. Bildungspraxis zwischen Vermittlungs- und Präventionsfunktion JF - Erwachsenenbildung: Vierteljahresschrift für Theorie und Praxis N2 - Dieser Beitrag ist als Theorie-Praxis-Reflexion ausgelegt, die auf einem Vortrag mit anschließender Gruppendiskussion mit Bildungspraktikern der katholischen Erwachsenenbildung basiert. Im Mittelpunkt steht die Frage, welche Aufgaben sich für die politische Bildungsarbeit mit Erwachsenen in der momentanen Situation ergeben. KW - Europa KW - Flüchtling KW - Katholische Erwachsenenbildung KW - Krise KW - Teilnehmer Y1 - 2016 U6 - https://doi.org/10.13109/erbi.2016.62.3.128 SN - 0341-7905 SN - 2365-4953 VL - 62 IS - 3 SP - 128 EP - 130 PB - Vandenhoeck & Ruprecht CY - Göttingen ER - TY - JOUR A1 - Görtler, Michael T1 - Politische Bildung in unruhigen Zeiten? Ein Beispiel für eine Theorie-Praxis-Reflexion JF - forum erwachsenenbildung KW - Evangelische Erwachsenenbildung KW - Politische Bildung KW - Tagungsbericht KW - Theorie-Praxis-Beziehung Y1 - 2016 UR - https://www.waxmann.com/waxmann-zeitschriften/waxmann-zeitschriftendetails/?tx_p2waxmann_pi2[zeitschrift]=ZEI1028&tx_p2waxmann_pi2[ausgabe]=AUG100240&tx_p2waxmann_pi2[artikel]=ART101908&tx_p2waxmann_pi2[action]=artikel SN - 1433-769X VL - 49 IS - 2 SP - 48 EP - 49 PB - Waxmann CY - Münster ER - TY - JOUR A1 - Görtler, Michael T1 - Unzufriedene Demokraten und Radikalisierung als Herausforderung für die politische Bildung JF - Politische Bildung: Journal für politische Bildung KW - Demokratie KW - Fremdenfeindlichkeit KW - Politische Bildung KW - Radikalismus Y1 - 2015 SN - 2191-8244 SN - 2749-4888 IS - 4: Unzufriedene Demokraten - radikalisierte Überzeugungen SP - 34 EP - 42 PB - Wochenschau Verlag CY - Frankfurt am Main ER - TY - JOUR A1 - Görtler, Michael T1 - Dem Rechtspopulismus begegnen. Drei bildungspraktische Thesen JF - forum erwachsenenbildung KW - Erwachsenenbildung KW - Populismus Y1 - 2017 UR - https://www.waxmann.com/index.php?eID=download&id_artikel=ART102163&uid=frei SN - 1433-769X VL - 50 IS - 2 SP - 43 EP - 44 PB - Waxmann ER - TY - JOUR A1 - Görtler, Michael T1 - Was ist politische Bildung? JF - Praxis Gemeindepädagogik KW - Didaktik KW - Geschichte (Histor) KW - Konzept KW - Politische Bildung KW - Theorie Y1 - 2014 SN - 1860-6946 VL - 67 IS - 1 SP - 11 EP - 14 PB - Evangelische Verlagsanstalt CY - Leipzig ER - TY - JOUR A1 - Görtler, Michael T1 - Politische Bildung in Zeiten des Rechtspopulismus. Pädagogische und fachdidaktische Ansätze zum Umgang mit einer gegenwärtigen Bedrohung für den Frieden JF - Vierteljahrsschrift für wissenschaftliche Pädagogik N2 - Right-wing populism challenges the societies in Europe. The rise of such movements and parties are a threat to peace and democracy in Germany. This article focuses the possibilities as well as the boundaries of political education under the current circumstances. To this end, it discusses theoretical explanations based on approaches in peace education, political didactics and social sciences to deal with right-wing populism in practice. (DIPF/Orig.). T2 - Political education in times of right-wing populism : Pedagogical and didactical approaches to deal with a current threat to peace KW - Begriff KW - Demokratie KW - Fachdidaktik KW - Frieden KW - Friedenspädagogik KW - Pädagogik KW - Politische Bildung KW - Populismus KW - Sozialwissenschaften Y1 - 2019 U6 - https://doi.org/10.30965/25890581-09501006 SN - 2589-0581 VL - 95 IS - 1 SP - 61 EP - 73 PB - Brill ER -