Refine
Year of publication
Document Type
- Conference Proceeding (91)
- Article (47)
- Lecture (3)
- Report (2)
- Course Material (1)
- Other (1)
Has Fulltext
- yes (145) (remove)
Keywords
- Biosensor (25)
- Finite-Elemente-Methode (16)
- CAD (15)
- civil engineering (14)
- Bauingenieurwesen (13)
- Einspielen <Werkstoff> (13)
- shakedown analysis (8)
- FEM (6)
- Clusterion (5)
- limit analysis (5)
- Air purification (4)
- Einspielanalyse (4)
- Hämoglobin (4)
- Limit analysis (4)
- Luftreiniger (4)
- Plasmacluster ion technology (4)
- Raumluft (4)
- Shakedown (4)
- Shakedown analysis (4)
- Technische Mechanik (4)
- Traglast (4)
- Traglastanalyse (4)
- shakedown (4)
- Kohlenstofffaser (3)
- Lipopolysaccharide (3)
- Sonde (3)
- lipopolysaccharides (3)
- ratchetting (3)
- Analytischer Zulaessigkeitsnachweis (2)
- Architektur (2)
- Bruchmechanik (2)
- Capacitive field-effect sensor (2)
- Druckbeanspruchung (2)
- Druckbehälter (2)
- Druckbelastung (2)
- Einspiel-Analyse (2)
- Eisschicht (2)
- Erythrozyt (2)
- Fehlerstellen (2)
- Fibroblast (2)
- Label-free detection (2)
- Pflanzenphysiologie (2)
- Pflanzenscanner (2)
- Ratcheting (2)
- Rohr (2)
- Rohrbruch (2)
- Stahl (2)
- Stickstoffmonoxid (2)
- architecture (2)
- biosensor (2)
- biosensors (2)
- burst pressure (2)
- burst tests (2)
- capacitive field-effect sensors (2)
- celldrum technology (2)
- flaw (2)
- limit load (2)
- load limit (2)
- nanostructured carbonized plant parts (2)
- nanostrukturierte carbonisierte Pflanzenteile (2)
- nitric oxide gas (2)
- pipes (2)
- plant scanner (2)
- tension–torsion loading (2)
- vessels (2)
- 3-nitrofluoranthene (1)
- Adsorption (1)
- Alternating plasticity (1)
- Analysis (1)
- Anastomose (1)
- Anastomosis (1)
- Architectural design (1)
- Arthosetherapie (1)
- Aufschlagversuch (1)
- Autofluoreszenzverfahren (1)
- Axialbelastung (1)
- Axially cracked pipe (1)
- BTEX compounds (1)
- Bacterial cellulose (1)
- Bakterien (1)
- Basis Reduktion (1)
- Basis reduction (1)
- Bicharakteristikenverfahren (1)
- Bio-Sensors (1)
- Bioabsorbable (1)
- Biomechanics (1)
- Biomechanik (1)
- Biomedizinische Technik (1)
- Biophoton (1)
- Bioreaktor (1)
- Biosensorik (1)
- Blitzschutz (1)
- Blutzellenlagerung (1)
- Bone quality and biomechanics (1)
- CAD ; (1)
- CO (1)
- Carbon sources (1)
- Cellulose nanostructure (1)
- Cement infiltration (1)
- Conducing polymer (1)
- Convex optimization (1)
- Cost-effectiveness (1)
- Culture media (1)
- Dattel (1)
- Deformation (1)
- Dekontamination (1)
- Design-by-analysis (1)
- Druckgeräte (1)
- ECT (1)
- ELISA (1)
- EPN (1)
- Einspiel-Kriterium (1)
- Einspielen (1)
- Elastizität (1)
- Elastodynamik (1)
- Elastostatics (1)
- Elektrodynamik (1)
- Endothelzelle (1)
- Enterprise information systems (1)
- Environmental impact (1)
- Enzyme-linked immunosorbent assay (1)
- Epithel (1)
- Exact Ilyushin yield surface (1)
- Experiment (1)
- FEM-Programm (1)
- FEM-computation (1)
- Fault approximation (1)
- Fault detection (1)
- Festkörper (1)
- Finite element method (1)
- First Order Reliabiblity Method (1)
- First-order reliability method (1)
- Fließgrenze (1)
- Fluorescence (1)
- Fußball (1)
- GaAs hot electron injector (1)
- Gas sensor (1)
- Geriatric (1)
- German (1)
- Global and local collapse (1)
- Gold nanoparticles (1)
- Gonarthrose (1)
- Grenzwertberechnung (1)
- Gunn diode (1)
- Harnleiter (1)
- Heavy metal detection (1)
- Hemoglobin structure (1)
- High throughput experimentation (1)
- Hip fractures (1)
- Hotplate (1)
- Human Factors (1)
- Hydrodynamik (1)
- Hydrogel (1)
- Hydrogen sensor (1)
- Hämoglobinstruktur (1)
- I3S 2005 (1)
- ISFET (1)
- Information Integration Tools (1)
- Information extraction (1)
- International Symposium on Sensor Science (1)
- Inverse scattering problem (1)
- Kinematics (1)
- Kinetics (1)
- Kniegelenkarthrose (1)
- Knochen (1)
- Knochenbildung (1)
- Knochenchirugie (1)
- Knochendichte (1)
- Knowledge Management (1)
- Körpertemperatur (1)
- LED chip (1)
- LISA (1)
- Level sensor (1)
- Lichtstreuungsbasierte Instrumente (1)
- MBST (1)
- MCDA (1)
- MEMS (1)
- Main sensitivity (1)
- Materialermüdung (1)
- Mechanics (1)
- Mechanische Beanspruchung (1)
- Medusomyces gisevi (1)
- Microreactors (1)
- Model-driven software engineering (1)
- Multi-dimensional wave propagation (1)
- Multicell (1)
- Multiplexing (1)
- Nano Materials (1)
- Nanomaterial (1)
- Nanoparticles (1)
- Nanopartikel (1)
- Nanostructuring (1)
- Nanotechnologie (1)
- Nanotechnology ; Microelectronics ; Biosensors ; Superconductor ; MEMS (1)
- Natriumhypochlorit (1)
- Nichtlineare Gleichung (1)
- Nichtlineare Optimierung (1)
- Nichtlineare Welle (1)
- Ontologie <Wissensverarbeitung> (1)
- Ontology Engineering (1)
- Organkultur (1)
- Organophosphorus (1)
- Ostazine Orange (1)
- Osteoporose (1)
- Osteoporosis (1)
- PFM (1)
- Permeability (1)
- Permeabilität (1)
- Peroxidase (1)
- Pflanzenstress (1)
- Phenylalanine determination (1)
- Plant virus (1)
- Plastizität (1)
- Polylactide acid (1)
- Potentiometry (1)
- Pressure loaded crack-face (1)
- Prevention (1)
- Progressive plastic deformation (1)
- Prophylaxis (1)
- Proteine (1)
- Pseudomonas putida (1)
- Quartz crystal nanobalance (QCN) (1)
- Quartz micro balances (1)
- Random variable (1)
- Ratchetting (1)
- Reaction-diffusion (1)
- Red blood cell storage (1)
- Resistive temperature detector (1)
- Schienbeinschoner (1)
- Schwammknochen (1)
- Sensitivity (1)
- Sepsis (1)
- Shakedown criterion (1)
- Silk fibroin (1)
- Skeletal muscle (1)
- Small Aral Sea (1)
- Software and systems modeling (1)
- Solid amalgam electrodes (1)
- Statics (1)
- Strukturanalyse (1)
- Supraleiter (1)
- Temperaturabhängigkeit (1)
- Tendons (1)
- Tin oxide (1)
- Tissue Engineering (1)
- Tobacco mosaic virus (TMV) (1)
- Torsion (1)
- Torsionsbelastung (1)
- Tragfähigkeit (1)
- UML (1)
- Ultrasound (1)
- Unified Modeling Language (1)
- Vertebroplastie (1)
- Vertebroplasty (1)
- Viscous flow (1)
- Viskose Strömung (1)
- Viskosität (1)
- Wafer (1)
- Wasserbrücke (1)
- Wasserstoffperoxid (1)
- Wellen (1)
- Wolff's Law (1)
- Wolffsches Gesetz (1)
- Wundheilung (1)
- Zeta potential (1)
- Zug-Druck Belastung (1)
- Zug-Druck-Beanspruchung (1)
- Zug-Druck-Belastung (1)
- acetoin (1)
- acetoin reductase (1)
- activated nanostructured carbon (1)
- aktivierte nanostrukturierte Kohlenstofffaser (1)
- alcoholic beverages (1)
- alternierend Verformbarkeit (1)
- ammonia gas sensors (1)
- amperometric biosensors (1)
- amperometric sensor (1)
- antimony doped tin oxide (1)
- aromatic amines (1)
- arthrosis therapy (1)
- atomic layer deposition (1)
- autofluorescence-based detection system (1)
- bicharacteristics (1)
- bioburdens (1)
- biocompatible (1)
- biocompatible materials (1)
- biodegradabl (1)
- biodegradable electronic devices (1)
- bone density (1)
- bone structure (1)
- cancellous bone (1)
- capacitive electrolyte–insulator–semiconductor sensors (1)
- capillary micro-droplet cell (1)
- carbon electrodes (1)
- carbonized rice husk (1)
- carcinogens (1)
- catalytic decomposition (1)
- chemical reduction method (1)
- contractile tension (1)
- cross sensitivity (1)
- cytosolic water diffusion (1)
- date palm tree (1)
- design-by-analysis (1)
- direct method (1)
- doped metal oxide (1)
- doped silicon (1)
- doping (1)
- ecological structure (1)
- elastic solids (1)
- electrical capacitance tomography (1)
- electro-migration (1)
- electronic noses dendronized polymers inverted mesa technology (1)
- encapsulation materials (1)
- enzymatic biosensor (1)
- enzymatic methods (1)
- enzyme immobilisation (1)
- epithelization (1)
- fatigue analyses (1)
- fenitrothion (1)
- fibroin (1)
- finite element analysis (1)
- fluidic (1)
- fortschreitende plastische Deformation (1)
- gas sensor (1)
- gas sensor array (1)
- glucose (1)
- gonarthrosis (1)
- graphene oxide (1)
- heater metallisation (1)
- hemoglobin (1)
- hemoglobin dynamics (1)
- high-temperature stability (1)
- human dermal fibroblasts (1)
- humidity (1)
- hydrogel (1)
- hydrogen peroxide (1)
- image sensor (1)
- imaging (1)
- impedance spectroscopy (1)
- ion-selective electrodes (1)
- kontraktile Spannung (1)
- konvexe Optimierung (1)
- lab-on-a-chip (1)
- lab-on-chip (1)
- large language models (1)
- layer expansion (1)
- layer-by-layer technique (1)
- lenslet array (1)
- light scattering analysis (1)
- lightning flash (1)
- limit and shakedown analysis (1)
- linear kinematic hardening (1)
- load carrying capacity (1)
- lower bound theorem (1)
- magnetic particles (1)
- material shakedown (1)
- matrix method (1)
- mechanical waves (1)
- metagenomics (1)
- metal oxide (1)
- microbial diversity (1)
- microreactor (1)
- microwave generation (1)
- modeling biosensor (1)
- modelling (1)
- modified electrode (1)
- multi-interface measurement (1)
- nanomaterials (1)
- naphtols (1)
- nitrogen oxides (1)
- nonlinear kinematic hardening (1)
- nonlinear optimization (1)
- nonlinear solids (1)
- nonlinear tensor constitutive equation (1)
- organic PVC membranes (1)
- pH sensors (1)
- pH-based biosensing (1)
- pattern-size reduction (1)
- penicillin (1)
- penicillinase (1)
- phenols (1)
- photoelectrochemistry (1)
- plant stress (1)
- plasma generated ions (1)
- plastic deformation (1)
- polyaniline (1)
- polymer composites (1)
- porous Pt electrode (1)
- principal component (1)
- probabilistic fracture mechanics (1)
- protein (1)
- quantum charging (1)
- reliability (1)
- reliability analysis (1)
- rhAPC (1)
- screen-printing (1)
- second-order reliability method (1)
- self-aligned patterning (1)
- semantic role labeling (1)
- sensing properties (1)
- shakedown analyses (1)
- shotgun sequencing (1)
- speaker attribution (1)
- sterilisation (1)
- sterility tests (1)
- sterilization efficacy (1)
- sterilization methods (1)
- subsurface ice research (1)
- subsurface probe (1)
- surface modification (1)
- swift heavy ions (1)
- thermal ratcheting (1)
- thick-film technology (1)
- thin-film microsensors (1)
- titanium dioxide photoanode (1)
- ultrathin gate insulators (1)
- validation methods (1)
- voltammetry (1)
- wafer-level testing (1)
- water bridge phenomenon (1)
- wound healing (1)
- yield stress (1)
Institute
- Fachbereich Medizintechnik und Technomathematik (145) (remove)
A concept for a sensitive micro total analysis system for high throughput fluorescence imaging
(2006)
This paper discusses possible methods for on-chip fluorescent imaging for integrated bio-sensors. The integration of optical and electro-optical accessories, according to suggested methods, can improve the performance of fluorescence imaging. It can boost the signal to background ratio by a few orders of magnitudes in comparison to conventional discrete setups. The methods that are present in this paper are oriented towards building reproducible arrays for high-throughput micro total analysis systems (µTAS). The first method relates to side illumination of the fluorescent material placed into microcompartments of the lab-on-chip. Its significance is in high utilization of excitation energy for low concentration of fluorescent material. The utilization of a transparent µLED chip, for the second method, allows the placement of the excitation light sources on the same optical axis with emission detector, such that the excitation and emission rays are directed controversly. The third method presents a spatial filtering of the excitation background.
Contractile behavior of the gastrocnemius medialis muscle during running in simulated hypogravity
(2021)
Vigorous exercise countermeasures in microgravity can largely attenuate muscular degeneration, albeit the extent of applied loading is key for the extent of muscle wasting. Running on the International Space Station is usually performed with maximum loads of 70% body weight (0.7 g). However, it has not been investigated how the reduced musculoskeletal loading affects muscle and series elastic element dynamics, and thereby force and power generation. Therefore, this study examined the effects of running on the vertical treadmill facility, a ground-based analog, at simulated 0.7 g on gastrocnemius medialis contractile behavior. The results reveal that fascicle−series elastic element behavior differs between simulated hypogravity and 1 g running. Whilst shorter peak series elastic element lengths at simulated 0.7 g appear to be the result of lower muscular and gravitational forces acting on it, increased fascicle lengths and decreased velocities could not be anticipated, but may inform the development of optimized running training in hypogravity. However, whether the alterations in contractile behavior precipitate musculoskeletal degeneration warrants further study.
The international partnership of space agencies has agreed to proceed forward to the Moon sustainably. Activities on the Lunar surface (0.16 g) will allow crewmembers to advance the exploration skills needed when expanding human presence to Mars (0.38 g). Whilst data from actual hypogravity activities are limited to the Apollo missions, simulation studies have indicated that ground reaction forces, mechanical work, muscle activation, and joint angles decrease with declining gravity level. However, these alterations in locomotion biomechanics do not necessarily scale to the gravity level, the reduction in gastrocnemius medialis activation even appears to level off around 0.2 g, while muscle activation pattern remains similar. Thus, it is difficult to predict whether gastrocnemius medialis contractile behavior during running on Moon will basically be the same as on Mars. Therefore, this study investigated lower limb joint kinematics and gastrocnemius medialis behavior during running at 1 g, simulated Martian gravity, and simulated Lunar gravity on the vertical treadmill facility. The results indicate that hypogravity-induced alterations in joint kinematics and contractile behavior still persist between simulated running on the Moon and Mars. This contrasts with the concept of a ceiling effect and should be carefully considered when evaluating exercise prescriptions and the transferability of locomotion practiced in Lunar gravity to Martian gravity.
REM sleep without atonia (RSWA) is a key feature for the diagnosis of rapid eye movement (REM) sleep behaviour disorder (RBD). We introduce RBDtector, a novel open-source software to score RSWA according to established SINBAR visual scoring criteria. We assessed muscle activity of the mentalis, flexor digitorum superficialis (FDS), and anterior tibialis (AT) muscles. RSWA was scored manually as tonic, phasic, and any activity by human scorers as well as using RBDtector in 20 subjects. Subsequently, 174 subjects (72 without RBD and 102 with RBD) were analysed with RBDtector to show the algorithm’s applicability. We additionally compared RBDtector estimates to a previously published dataset. RBDtector showed robust conformity with human scorings. The highest congruency was achieved for phasic and any activity of the FDS. Combining mentalis any and FDS any, RBDtector identified RBD subjects with 100% specificity and 96% sensitivity applying a cut-off of 20.6%. Comparable performance was obtained without manual artefact removal. RBD subjects also showed muscle bouts of higher amplitude and longer duration. RBDtector provides estimates of tonic, phasic, and any activity comparable to human scorings. RBDtector, which is freely available, can help identify RBD subjects and provides reliable RSWA metrics.
A solid-state amperometric hydrogen sensor based on a protonated Nafion membrane and catalytic active electrode operating at room temperature was fabricated and tested. Ionic conducting polymer-metal electrode interfaces were prepared chemically by using the impregnation-reduction method. The polymer membrane was impregnated with tetra-ammine platinum chloride hydrate and the metal ions were subsequently reduced by using either sodium tetrahydroborate or potassium tetrahydroborate. The hydrogen sensing characteristics with air as reference gas is reported. The sensors were capable of detecting hydrogen concentrations from 10 ppm to 10% in nitrogen. The response time was in the range of 10-30 s and a stable linear current output was observed. The thin Pt films were characterized by XRD, Infrared Spectroscopy, Optical Microscopy, Atomic Force Microscopy, Scanning Electron Microscopy and EDAX.
Für die Verarbeitung von natürlicher Sprache ist ein wichtiger Zwischenschritt das Parsing, bei dem für Sätze der natürlichen Sprache Ableitungsbäume bestimmt werden. Dieses Verfahren ist vergleichbar zum Parsen formaler Sprachen, wie z. B. das Parsen eines Quelltextes. Die Parsing-Methoden der formalen Sprachen, z. B. Bottom-up-Parser, können nicht auf das Parsen der natürlichen Sprache übertragen werden, da keine Formalisierung der natürlichen Sprachen existiert [3, 12, 23, 30].
In den ersten Programmen, die natürliche Sprache verarbeiten [32, 41], wurde versucht die natürliche Sprache mit festen Regelmengen zu verarbeiten. Dieser Ansatz stieß jedoch schnell an seine Grenzen, da die Regelmenge nicht vollständig sowie nicht minimal ist und wegen der benötigten Menge an Regeln schwer zu verwalten ist. Die Korpuslinguistik [22] bot die Möglichkeit, die Regelmenge durch Supervised-Machine-Learning-Verfahren [2] abzulösen.
Teil der Korpuslinguistik ist es, große Textkorpora zu erstellen und diese mit sprachlichen Strukturen zu annotieren. Zu diesen Strukturen gehören sowohl die Wortarten als auch die Ableitungsbäume der Sätze. Vorteil dieser Methodik ist es, dass repräsentative Daten zur Verfügung stehen. Diese Daten werden genutzt, um mit Supervised-Machine-Learning-Verfahren die Gesetzmäßigkeiten der natürliche Sprachen zu erlernen.
Das Maximum-Entropie-Verfahren ist ein Supervised-Machine-Learning-Verfahren, das genutzt wird, um natürliche Sprache zu erlernen. Ratnaparkhi [25] nutzt Maximum-Entropie, um Ableitungsbäume für Sätze der natürlichen Sprache zu erlernen. Dieses Verfahren macht es möglich, die natürliche Sprache (abgebildet als Σ∗) trotz einer fehlenden formalen Grammatik zu parsen.
Research collaborations provide opportunities for both practitioners and researchers: practitioners need solutions for difficult business challenges and researchers are looking for hard problems to solve and publish. Nevertheless, research collaborations carry the risk that practitioners focus on quick solutions too much and that researchers tackle theoretical problems, resulting in products which do not fulfill the project requirements.
In this paper we introduce an approach extending the ideas of agile and lean software development. It helps practitioners and researchers keep track of their common research collaboration goal: a scientifically enriched software product which fulfills the needs of the practitioner’s business model.
This approach gives first-class status to application-oriented metrics that measure progress and success of a research collaboration continuously. Those metrics are derived from the collaboration requirements and help to focus on a commonly defined goal.
An appropriate tool set evaluates and visualizes those metrics with minimal effort, and all participants will be pushed to focus on their tasks with appropriate effort. Thus project status, challenges and progress are transparent to all research collaboration members at any time.
The ANM’09 multi-disciplinary scientific program includes topics in the fields of "Nanotechnology and Microelectronics" ranging from "Bio/Micro/Nano Materials and Interfacing" aspects, "Chemical and Bio-Sensors", "Magnetic and Superconducting Devices", "MEMS and Microfluidics" over "Theoretical Aspects, Methods and Modelling" up to the important bridging "Academics meet Industry".
Proceedings of the 2nd Humboldt Kolleg, Hammamet, Tunisia Organizer: Alexander von Humboldt Stiftung, Germany. pdf 184 p. Welcome Address Dear Participants, Welcome to the 2nd Humboldt Kolleg in “Nanoscale Science and Technology” (NS&T’12) in Tunisia, sponsored by the "Alexander von Humboldt" foundation. The NS&T’12 multidisciplinary scientific program includes seven "hot" topics dealing with "Nanoscale Science and Technology" covering basic and application-oriented research as well as industrial (market) aspects: - Molecular Biophyics, Spectroscopy Techniques, Imaging Microscopy - Nanomaterials Synthesis for Medicine and Bio-chemical Sensors - Nanostructures, Semiconductors, Photonics and Nanodevices - New Technologies in Market Industry - Environment, Electro-chemistry, Bio-polymers and Fuel Cells - Nanomaterials, Photovoltaic, Modelling, Quantum Physics - Microelectronics, Sensors Networks and Embedded Systems We are deeply indebted to all members of the Scientific Committee and General Chairs for joint Sessions and to all speakers and chairmen, who have dedicated invaluable time and efforts for the realization of this event. On behalf of the Organizing Committee, we are cordially inviting you to join the conference and hope that your stay will be fruitful, rewarding and enjoyable. Prof. Dr. Michael J. Schöning, Prof. Dr. Adnane Abdelghani
The demand of replacements for inoperable organs exceeds the amount of available organ transplants. Therefore, tissue engineering developed as a multidisciplinary field of research for autologous in-vitro organs. Such three dimensional tissue constructs request the application of a bioreactor. The UREPLACE bioreactor is used to grow cells on tubular collagen scaffolds OPTIMAIX Sponge 1 with a maximal length of 7 cm, in order to culture in vitro an adequate ureter replacement. With a rotating unit, (urothelial) cells can be placed homogeneously on the inner scaffold surface. Furthermore, a stimulation is combined with this bioreactor resulting in an orientation of muscle cells. These culturing methods request a precise control of several parameters and actuators. A combination of a LabBox and the suitable software LabVision is used to set and conduct parameters like rotation angles, velocities, pressures and other important cell culture values. The bioreactor was tested waterproof successfully. Furthermore, the temperature controlling was adjusted to 37 °C and the CO2 - concentration regulated to 5 %. Additionally, the pH step responses of several substances showed a perfect functioning of the designed flow chamber. All used software was tested and remained stable for several days.