Determination of local material properties of OSB sample by coupling advanced imaging techniques and morphology-based FEM simulation

This is the publisher’s final pdf. The published article is copyrighted by Walter de Gruyter & Co. and can be found at: http://www.degruyter.com/.The goal was to determine local mechanical properties inside of oriented strand board (OSB) based on a realistic morphology-based finite element (FE) model and data acquired from a physical test performed on the same material. The spatial information and local grayscale intensity from CT-scans obtained from small OSB sample was transformed into a 2D regular morphology-based FE mesh with corresponding material properties. The model was then used to simulate the actual compression test performed on the specimen using simplified boundary conditions. The simulated strain fields from the model were compared with the actual strain field measured on the specimen surface during the compression test by means of a full-field optical method, named digital image correlation (DIC). Finally, the original set of material properties was adjusted by an iterative procedure to minimize the difference between the simulated and the measured strain data. The results show that the developed procedure is useful to find local material properties as well as for morphological modeling without the need of segmentation of the image data. The achieved results serve as a prerequisite for full 3D analyses of the complex materials

Bürgerschaftliches Engagement und soziale Ungleichheit. Eine Untersuchung auf Basis des European Social Survey

(no abstract available

A finite element based formulation for sensitivity studies of piezoelectric systems

Sensitivity Analysis is a branch of numerical analysis which aims to quantify the affects that variability in the parameters of a numerical model have on the model output. A finite element based sensitivity analysis formulation for piezoelectric media is developed here and implemented to simulate the operational and sensitivity characteristics of a piezoelectric based distributed mode actuator (DMA). The work acts as a starting point for robustness analysis in the DMA technology

Finite Element Crash Simulations and Impact-Induced Injuries

This bibliography lists references to papers, conference proceedings and theses/dissertations dealing with finite element simulations of crashes, impact-induced injuries and their protection that were published in 1980–1998. 390 citations are listed

Finite Element Computational Dynamics of Rotating Systems

This bibliography lists references to papers, conference proceedings and theses/dissertations dealing with finite element analysis of rotor dynamics problems that were published in 1994–1998. It contains 319 citations. Also included, as separate subsections, are finite element analyses of rotor elements – discs, shafts, spindles, and blades. Topics dealing with fracture mechanics, contact and stability problems of rotating machinery are also considered in specific sections. The last part of the bibliography presents papers dealing with specific industrial applications

Finite Element Vibration Analysis of Beams, Plates and Shells

This bibliography lists references to papers, conference proceedings and theses/dissertations dealing with finite element vibration analysis of beams, plates and shells that were published in 1994–1998. It contains 361 citations. Also included, as separated subsections, are vibration analysis of composite materials and vibration analysis of structural elements with cracks/contacts

Blick-Wechsel

Die vorliegende Arbeit nimmt bei der Beobachtung, dass Veza Canettis Texte durch das Vokabular visueller Wahrnehmung strukturiert sind, ihren Ausgang. Im Theorieteil der Arbeit werden drei Ansätze dargestellt: Georg Simmels "Soziologie der Sinne", Otto Fenichels "Schautrieb und Identifizierung" und Jean-Paul Sartres Kapitel "Der Blick", welches in "Das Sein und das Nichts" enthalten ist. Im Analyseteil der Arbeit werden die Erzählungen "Drei Viertel" und "Hellseher" mittels der zuvor herausgearbeiteten Methode auf ihre Blickordnung hin untersucht. Ergebnis dieser Untersuchung ist, dass das Blicken in den analysierten Texten eine gesellschaftliche Funktion einnimmt. Figuren, die jemanden anblicken, sind oft diejenigen, die eine bestimmte gesellschaftliche Position innehaben und damit auch zum Blicken – und damit zum Beurteilen – innerhalb der vorhandenen sozialen Ordnung "legitimiert" sind. So werden die sozialen Machtverhältnisse im Netz der Blicke widergespiegelt. Das bedeutet mitunter auch einen raschen Wechsel in der Rollenverteilung, wenn sich die Figurenkonstellation ändert. In den untersuchten Erzählungen Canettis werden Dichotomien, wie jene zwischen TäterIn und Opfer, zwischen Gesellschaft und Individuum, aufgezeigt – um daraufhin gebrochen zu werden. Aus Canettis Texten lässt sich keine klare Einteilung der Figuren in diejenigen, die blicken und diejenigen, die nicht blicken können, herauslesen. Die Figuren bewegen sich vielmehr in verschiedenen Bedeutungsrahmen und nehmen dadurch unterschiedliche Positionen und auch Perspektiven ein. Es finden "Blick-Wechsel" statt, die die Machtverteilung ständig ändern

Electrochemical Direct Determination of Catecholamines for the Early Detection of Neurodegenerative Diseases

Smart (Nano) materials with biosensing functions posses enormous potential in development of new generation of stable biosensors, chemical sensors, and actuators. Recently, there is a considerable interest in using TiO2 nanostructured materials as a film-forming material since they have high surface area, optical transparency, high bio-compatibility, and relatively good conductivity. In this work, TiO2 nanostructured films were used as nanoporous electrodes to study the electron transfer mechanisms of dopamine. epinephrine and norepinephrine, in order to develop a new generation of chemical sensors. The interesting results obtained are described herein and the analytical characterization of these neurotransmitter sensors is reported

Prolonged survival in patients with local chronic infection after high-grade glioma treatment: Two case reports

High-grade gliomas are primary brain tumors with poor prognosis, despite surgical treatment followed by radiotherapy and concomitant chemotherapy. We present two cases of long-term survival in patients treated for high-grade glioma and concomitant prolonged bacterial wound infection. The first patient treated for glioblastoma IDH-wildtype had been without disease progression for 61 months from the first resected recurrence. Despite incomplete chemotherapy-induced myelosuppression in the second patient with anaplastic astrocytoma IDH-mutant, she died without disease relapse after 14 years from the diagnosis due to other comorbidities. We assume that the documented prolonged survival could be related to the bacterial infection