173,699 research outputs found
Delamination localisation and length estimation in composite laminate beam by VSHM and pattern recognition methods
No full textThe focus of this work is to investigate the delamination damage in laminate composite beams, to fix a Vibration-based structural health monitoring (VSHM) method for the laminate structures. The analysis is concentrated on the vibration characteristics of the samples and, in particular, the attention is addressed on the first several natural frequencies of a composite laminate beam with a delamination damage. The core of this work is an experimental investigation on the vibration response of a composite laminate beam and its changes caused by delaminations with different sizes and in different locations of the beam. The study is divided in 3 sections: delamination detection, delamination localization, and delamination estimate. The aim is to determine how the first six harmonics frequencies change due to the delamination, and the results show that they can be successfully used to investigate the presence, the location and the dimensions of the delamination in a composite beam. A Pattern Recognition analysis is used to locate the damage, while the detection and the evaluation are done using the changes in the harmonic frequencies. A finite element analysis is performed, and the variations of the natural frequencies due to delamination are in good agreement with the experimental results
Merckwürdige Mißions- und Reise-Beschreibung Nach Congo in Ethiopien : Worinnen Nicht allein alles dasjenige, was sich auf dieser Reise aus Steyermarck, durch Italien, Spanien, Portugall und Indien biß nach Ethiopien denckwürdiges zugetragen/ sondern auch die Sitten und Gebräuche der heydnischen Indianer/ ihre Abgötterey und Aberglauben, ihre Regiments-Verfassung, ihre innerliche und auswärtige Kriege, ihr Handel und Wandel, ihre Kranckheiten und derselben Curen/ ihre Art zu begraben/ die Früchte, Bäume, Thiere, Fische [et]c. so das Land hervor bringet : Desgleichen wie die Verfassung der Mißion in diesem Lande beschaffen, und wie eine grosse Menge Einwohner durch den Autorem von dem heydnischen Unglauben zur Christlichen Catholischen Religion bekehret und getaufft worden, Nebst unzehlich vielen andern curiösen und lesenswürdigen Sachen beschrieben werden
No full textvon P. Antonio Zucchelli von Gradisca, Predigern des Cappuciner-Ordens in Steyermarck und ehemahls Apostol. Missionario in Congo ; Aus der Italiänischen Sprache in die Hoch-Deutsche übersetztFrontispiz, Titelblatt in Rot- und SchwarzdruckPaginierung springt teilweiseAus dem Vorbesitz des Klosters Rheinau, mit Verblaexlibris auf dem Titelblatt. Exlibris mit der Legende "Sub Abbate Geroldo 2do. 1715" im vorderen Spiege
Sound production in the larvae of Geotrupes spiniger (Marsham) (Coleoptera: Geotrupidae).
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Long-term effect on tooth vitality of regenerative therapy in deep periodontal bony defects: a retrospective study
No full textOver the last few decades, many authors have investigated the effect of periodontal disease and treatment on pulpal status with controversial results. This study was conducted to verify whether periodontal disease in a deep intrabony defect and complex therapy, including aggressive root planing such as in periodontal regeneration, have an influence on tooth vitality. One hundred thirty-seven patients who fulfilled the requirements were included. The collected data did not support the need for "preventive" root canal treatment in severely compromised teeth that are planned to undergo periodontal regenerative surgery. © 2013 by Quintessence Publishing Co Inc
Long-term effect on tooth vitality of regenerative therapy in deep periodontal bony defects: a retrospective study.
No full textOver the last few decades, many authors have investigated the effect of periodontal disease and treatment on pulpal status with controversial results. This study was conducted to verify whether periodontal disease in a deep intrabony defect and complex therapy, including aggressive root planing such as in periodontal regeneration, have an influence on tooth vitality. One hundred thirty-seven patients who fulfilled the requirements were included. The collected data did not support the need for "preventive" root canal treatment in severely compromised teeth that are planned to undergo periodontal regenerative surgery
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