Refine
Year of publication
- 2012 (164) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (59)
- INB - Institut für Nano- und Biotechnologien (28)
- IfB - Institut für Bioengineering (28)
- Fachbereich Elektrotechnik und Informationstechnik (24)
- Fachbereich Chemie und Biotechnologie (15)
- Fachbereich Maschinenbau und Mechatronik (14)
- Solar-Institut Jülich (13)
- Fachbereich Luft- und Raumfahrttechnik (10)
- Fachbereich Wirtschaftswissenschaften (10)
- Fachbereich Bauingenieurwesen (9)
Language
- English (164) (remove)
Document Type
- Article (82)
- Conference Proceeding (59)
- Book (6)
- Part of a Book (5)
- Conference: Meeting Abstract (5)
- Doctoral Thesis (5)
- Other (1)
- Review (1)
Keywords
- (Bio)degradation (1)
- 802.15.4 (1)
- Acceleration (1)
- Afterload (1)
- Alginate beads (1)
- Anastomotic leakage (1)
- Autolysis (1)
- Avalanche (1)
- Bank-issued Warrants (1)
- Bio-Sensors (1)
- Biosensor (1)
- Bluetooth (1)
- Borehole heat exchanger (1)
- Calorimetric gas sensor (1)
- Cell permeability (1)
- CellDrum (1)
- Cellular force (1)
- Central receiver system (1)
- Chemical imaging sensor (1)
- Circular Dichroism (1)
- Cloud Computing (1)
- Cloud Service Broker (1)
- Compliance (1)
- Concentrated solar collector (1)
- Consensus (1)
- Contractile tension (1)
- Contractility (1)
- C–V method (1)
- Decomposition (1)
- Detergent protease (1)
- Discourse ethics (1)
- Disposition Effect (1)
- Distributed Control Systems, (1)
- Eisschicht (1)
- Elemental (1)
- End-to-end colorectal anastomosis (1)
- Endothelial cells (1)
- Esophageal Doppler monitor (1)
- Extracellular enzymes (1)
- Field-effect sensor (1)
- Finite differences (1)
- Finite element modelling (1)
- Force (1)
- Freeze–thaw process (1)
- Fresnel collector (1)
- Grid Computing (1)
- Heat transport (1)
- Hydrogen peroxide (1)
- Hypersecretion (1)
- IP-based networks (1)
- Impedance spectroscopy (1)
- Individual Investors (1)
- Industrial Automation Technology, (1)
- Kinetic energy (1)
- LAPS (1)
- Light-addressable potentiometric sensor (1)
- Lipopolysaccharide (1)
- Liver (1)
- Low-field NMR (1)
- MATLAB , MLPI , Motion control , Open Core , industrial drives , rapid control prototypin , sercos automation bus (1)
- Marker-free mutagenesis (1)
- NGN (1)
- NMR exchange relaxometry (1)
- NONOate (1)
- Nano Materials (1)
- Nanomaterial (1)
- Nanotechnologie (1)
- Negative Feedback Trading (1)
- Nitric Oxide (1)
- Nitric Oxide Donor (1)
- Numerical linear algebra (1)
- Optical and thermal analysis (1)
- Organic light-emitting diode display (1)
- PIV (1)
- PROFINET (1)
- Poly(d,l-lacticacid) (1)
- Polyimide (1)
- Real-time monitoring (1)
- Recombinant activated protein C (1)
- Requirements prioritization (1)
- Requirements relations (1)
- ScaLAPACK (1)
- Snow (1)
- Solar concentration (1)
- Sonde (1)
- Spleen (1)
- Stenotrophomonas maltophilia (1)
- Sterilisation process (1)
- Surgical staplers (1)
- Tool support (1)
- Trading Behavior (1)
- Uracil-phosphoribosyltransferase (1)
- VOF (1)
- Variable height stapler design (1)
- Velocity (1)
- Volume status (1)
- Wireless Networks (1)
- Workflow (1)
- Workflow Orchestration (1)
- architectural design process (1)
- brachytherapy (1)
- dam-break (1)
- design theory (1)
- drag force (1)
- eigensolvers (1)
- incontinence (1)
- instruments (1)
- interdisciplinarity (1)
- methodologies (1)
- next generation network (1)
- numerical model (1)
- performance analysis (1)
- physical model (1)
- product bundling (1)
- prostate cancer (1)
- prostatectomy (1)
- quality of life (1)
- subglacial aquatic ecosystems (1)
- subsurface ice (1)
- telecommunication (1)
Inkompressible Strömungen
(2012)
Determination of the frictional coefficient of the implant-antler interface : experimental approach
(2012)
The similar bone structure of reindeer antler to human bone permits studying the osseointegration of dental implants in the jawbone. As the friction is one of the major factors that have a significant influence on the initial stability of immediately loaded dental implants, it is essential to define the frictional coefficient of the implant-antler interface. In this study, the kinetic frictional forces at the implant-antler interface were measured experimentally using an optomechanical setup and a stepping motor controller under different axial loads and sliding velocities. The corresponding mean values of the static and kinetic frictional coefficients were within the range of 0.5–0.7 and 0.3–0.5, respectively. An increase in the frictional forces with increasing applied axial loads was registered. The measurements showed an evidence of a decrease in the magnitude of the frictional coefficient with increasing sliding velocity. The results of this study provide a considerable assessment to clarify the suitable frictional coefficient to be used in the finite element contact analysis of antler specimens.
Although Selective Laser Melting (SLM) process is an innovative manufacturing method, there are challenges such as inferior mechanical properties of fabricated objects. Regarding this, buckling deformation which is caused by thermal stress is one of the undesired mechanical properties which must be alleviated. As buckling deformation is more observable in hard to process materials, silver is selected to be studied theoretically and experimentally for this paper. Different scanning strategies are utilized and a Finite Element Method (FEM) is applied to calculate the temperature gradient in order to determine its effect on the buckling deformation of the objects from experiments.
Often, detailed simulations of heat conduction in complicated, porous media have large runtimes. Then homogenization is a powerful tool to speed up the calculations by preserving accurate solutions at the same time. Unfortunately real structures are generally non-periodic, which requires unpractical, complicated homogenization techniques. We demonstrate in this paper, that the application of simple, periodic techniques to realistic media, that are just close to periodic, gives accurate, approximative solutions. In order to obtain effective parameters for the homogenized heat equation, we have to solve a so called “cell problem”. In contrast to periodic structures it is not trivial to determine a suitable unit cell, which represents a non-periodic media. To overcome this problem, we give a rule of thumb on how to choose a good cell. Finally we demonstrate the efficiency of our method for virtually generated foams as well as real foams and compare these results to periodic structures.
Field-effect capacitive electrolyte-insulator-semiconductor (EIS) sensors functionalised with citrate-capped gold nanoparticles (AuNP) have been used for the electrostatic detection of macromolecules by their intrinsic molecular charge. The EIS sensor detects the charge changes in the AuNP/macromolecule hybrids induced by the adsorption or binding events. A feasibility of the proposed detection scheme has been exemplary demonstrated by realising EIS sensors for the detection of poly-D-lysine molecules.
The chemical imaging sensor is a chemical sensor which is capable of visualizing the spatial distribution of chemical species in sample solution. In this study, a novel measurement system based on the chemical imaging sensor was developed to observe the inside of a Y-shaped microfluidic channel while injecting two sample solutions from two branches. From the collected chemical images, it was clearly observed that the injected solutions formed laminar flows in the microfluidic channel. In addition, ion diffusion across the laminar flows was observed. This label-free method can acquire quantitative data of ion distribution and diffusion in microfluidic devices, which can be used to determine the diffusion coefficients, and therefore, the molecular weights of chemical species in the sample solution.
This work describes the novel combination of the light-addressable electrode (LAE) and the light-addressable potentiometric sensor (LAPS) into a microsystem set-up. Both the LAE as well as the LAPS shares the principle of addressing the active spot by means of a light beam. This enables both systems to manipulate resp. to detect an analyte with a high spatial resolution. Hence, combining both principles into a single set-up enables the active stimulation e.g., by means of electrolysis and a simultaneous observation e.g., the response of an entrapped biological cell by detection of extracellular pH changes. The work will describe the principles of both technologies and the necessary steps to integrate them into a single set-up. Furthermore, examples of application and operation of such systems will be presented.
A variety of transition metals, e.g., copper, zinc, cadmium, lead, etc. are widely used in industry as components for wires, coatings, alloys, batteries, paints and so on. The inevitable presence of transition metals in industrial processes implies the ambition of developing a proper analytical technique for their adequate monitoring. Most of these elements, especially lead and cadmium, are acutely toxic for biological organisms. Quantitative determination of these metals at low activity levels in different environmental and industrial samples is therefore a vital task. A promising approach to achieve an at-side or on-line monitoring on a miniaturized and cost efficient way is the combination of a common potentiometric sensor array with heavy metal-sensitive thin-film materials, like chalcogenide glasses and polymeric materials, respectively.
The construction of a statistical test is investigated which is based only on “reliability” and “precision” as quality criteria. The reliability of a statistical test is quantifiedin a straightforward way by the probability that the decision of the test is correct. However, the quantification of the precision of a statistical test is not at all evident. Thereforethe paper presents and discusses several approaches. Moreover the distinction of “nullhypothesis” and “alternative hypothesis” is not necessary any longer.
Real-time and reliable monitoring of the biogas process is crucial for a stable and efficient operation of biogas production in order to avoid digester breakdowns. The concentration of dissolved hydrogen (H₂) represents one of the key parameters for biogas process control. In this work, a one-chip integrated combined amperometric/field-effect sensor for monitoring the dissolved H₂ concentration has been developed for biogas applications. The combination of two different transducer principles might allow a more accurate and reliable measurement of dissolved H₂ as an early warning indicator of digester failures. The feasibility of the approach has been demonstrated by simultaneous amperometric/field-effect measurements of dissolved H₂ concentrations in electrolyte solutions. Both, the amperometric and the field-effect transducer show a linear response behaviour in the H₂ concentration range from 0.1 to 3% (v/v) with a slope of 198.4 ± 13.7 nA/% (v/v) and 14.9 ± 0.5 mV/% (v/v), respectively.