Elsevier
Refine
Year of publication
Institute
- Fachbereich Medizintechnik und Technomathematik (183)
- INB - Institut für Nano- und Biotechnologien (106)
- IfB - Institut für Bioengineering (64)
- Fachbereich Chemie und Biotechnologie (59)
- Fachbereich Luft- und Raumfahrttechnik (34)
- Fachbereich Energietechnik (29)
- Fachbereich Maschinenbau und Mechatronik (16)
- Fachbereich Bauingenieurwesen (14)
- Solar-Institut Jülich (14)
- Fachbereich Elektrotechnik und Informationstechnik (9)
Document Type
- Article (329)
- Part of a Book (12)
- Conference Proceeding (9)
- Other (1)
Keywords
- Earthquake (4)
- LAPS (4)
- Gamification (3)
- Heparin (3)
- Central receiver power plant (2)
- Central receiver system (2)
- Chemometrics (2)
- Concentrated solar collector (2)
- Concentrated systems (2)
- Field-effect sensor (2)
- Gas turbine (2)
- IR spectroscopy (2)
- Light-addressable potentiometric sensor (2)
- NMR spectroscopy (2)
- Solar concentration (2)
- Standardization (2)
- hydrogen peroxide (2)
- qNMR (2)
- (Bio)degradation (1)
- (Poly)saccharides (1)
- Adaptive Systems (1)
- Adaptive control (1)
- Additive Manufacturing (1)
- Additive manufacturing (1)
- Alginate beads (1)
- Aloe vera (1)
- Alzheimer's disease (1)
- Anastomotic leakage (1)
- Assembly (1)
- Assistive technology (1)
- Asymptotic efficiency (1)
- Augmented Reality (1)
- Authenticity (1)
- Autolysis (1)
- Automatic control (1)
- Avalanche (1)
- Bacillus atrophaeus (1)
- Binder Jetting (1)
- Biocomposites (1)
- Biomass (1)
- Bootstrapping (1)
- Borehole heat exchanger (1)
- CNOT (1)
- Calorimetric gas sensor (1)
- Capacitive field-effect (1)
- Cardiac tissue (1)
- Carrier solvents (1)
- Cell permeability (1)
- CellDrum (1)
- Cellular force (1)
- Censored data (1)
- Chemical images (1)
- Chemical imaging sensor (1)
- Chemical sensor (1)
- Chimeric liver-humanized mice (1)
- Collective risk model (1)
- Competitiveness (1)
- Computational biomechanics (1)
- Concentrating solar power (1)
- Constitutive model (1)
- Contractile tension (1)
- Cross border adjustment mechanism (1)
- Crude heparin (1)
- C–V method (1)
- DLR-ESTEC GOSSAMER roadmap for solar sailing (1)
- DNA biosensor (1)
- DNA hybridization (1)
- Damage mechanics theory (1)
- Decomposition (1)
- Decoupling (1)
- Dehydrogenase (1)
- Detergent protease (1)
- Deuterated solvents (1)
- Deuterium NMR (1)
- Diaphorase (1)
- Digital Twin (1)
- Dimensional splitting (1)
- Directed Energy Deposition (1)
- Discontinuous fractures (1)
- Drinfeld modules (1)
- Drug distribution (1)
- Drug metabolism (1)
- Drug simulation (1)
- Dry-low-NOx (DLN) combustion (1)
- Dynamic simulation (1)
- E-Mobility (1)
- E. coli detection (1)
- EGG (1)
- EIS capacitive sensor (1)
- Electrolyte–insulator–semiconductor (1)
- Electromechanical modeling (1)
- Electronic cigarettes (1)
- End-to-end colorectal anastomosis (1)
- Endothelial cells (1)
- Energy-intensive industry (1)
- Enzymatic biosensor (1)
- Enzyme logic gate (1)
- Error Recovery (1)
- Exponential time differencing (1)
- External knee adduction moments (1)
- Extracellular enzymes (1)
- Fault detection (1)
- Field effect (1)
- Finite differences (1)
- Finite element analysis (1)
- Finite element modelling (1)
- Floor prices (1)
- Fracture classification (1)
- Frame structure (1)
- Free-base nicotine (1)
- Freeze–thaw process (1)
- Frequency adaption (1)
- Fresnel collector (1)
- Fresnel power plant (1)
- Fuel cell (1)
- GOSSAMER-1 (1)
- Gamma distribution (1)
- Goodness-of-fit test (1)
- Hazard assessment (1)
- Health management system (1)
- Heat transport (1)
- High hydrogen combustion (1)
- Higher derivations (1)
- Hodgkin–Huxley models (1)
- Homogenization (1)
- Human-Computer interaction (1)
- Humidity (1)
- Hybridization (1)
- Hydrogen combustion (1)
- Hydrogen gas turbine (1)
- Hydrogen peroxide (1)
- Hypersecretion (1)
- INSYSME (1)
- Imaging (1)
- Impedance spectroscopy (1)
- In-plane performance, isolation (1)
- Independence test (1)
- Infill wall design (1)
- Inorganic ions (1)
- Interplanetary flight (1)
- Interstellar objects (1)
- Inverse dynamic problem (1)
- Inverse kinematic problem (1)
- Ions (1)
- Iterative learning control (1)
- Knockout mice (1)
- L-PBF (1)
- LPBF (1)
- Label-free detection (1)
- Landslide tsunamis (1)
- Large scale tests (1)
- Larynx position (1)
- Laser-Powder Bed Fusion (1)
- Layer-by-layer adsorption (1)
- Level system (1)
- Light-addressable Potentiometric Sensor (1)
- Lipopolysaccharide (1)
- Liver (1)
- Low field NMR (1)
- Low-field NMR (1)
- Manipulated variables (1)
- Marker-free mutagenesis (1)
- Masonry infill (1)
- Masonry partition walls (1)
- Master stamp (1)
- Matrix exponential (1)
- Micromix combustion (1)
- Mild cognitive impairment (1)
- Missions (1)
- Mobility transition (1)
- Molecular modelling (1)
- Molecular weight determination (1)
- Molten salt receiver system (1)
- Molten salt solar tower (1)
- Morphing (1)
- Multi-criteria decision analysis (1)
- Multi-storey (1)
- Musculoskeletal model (1)
- NMR (1)
- NMR exchange relaxometry (1)
- Natural fibres (1)
- Negative impedance convertor (1)
- Niacin (1)
- Non-model-based Evaluation (1)
- Non-parallel fissures (1)
- Numerical modelling (1)
- Online diagnostic (1)
- Optical and thermal analysis (1)
- Organic acids (1)
- Organic light-emitting diode display (1)
- Out-of-plane capacity (1)
- Overland flow (1)
- PLS-regression (1)
- Parametric bootstrap (1)
- Periods (1)
- Photolithographic mimics (1)
- Piping (1)
- Poly(allylamine hydrochloride) (1)
- Poly(d,l-lacticacid) (1)
- Polyimide (1)
- Polymer-matrix composites (1)
- Powder Material (1)
- Power conversion systems (1)
- Preference assessment (1)
- Principal component analysis (1)
- Probability distribution mapping (1)
- Product-integration (1)
- Proper Orthogonal Decomposition (1)
- Pulsations (1)
- Q-criterion (1)
- Quality control (1)
- Quantum chemistry (1)
- Quartz crystal microbalance (1)
- Reaction-diffusion systems (1)
- Real distinct pole (1)
- Real-time monitoring (1)
- Recombinant activated protein C (1)
- Regionalization (1)
- Rehabilitation engineering (1)
- Reinforced concrete frame (1)
- Resonance-mode measurement (1)
- Retinal vessel analysis (1)
- Riboflavin (1)
- Robotic rehabilitation (1)
- Seismic loading (1)
- Semi-parametric random censorship model (1)
- Shoulder (1)
- Simultaneous determination (1)
- Slab deflection (1)
- Small spacecraft (1)
- Snow (1)
- Soft independent modeling of class analogy (1)
- Solar dish (1)
- Solar sail (1)
- Solitary waves (1)
- Spacecraft (1)
- Spectroscopy (1)
- Spleen (1)
- Steel industry (1)
- Stenotrophomonas maltophilia (1)
- Sterilisation process (1)
- Stress concentrations (1)
- Support System (1)
- Surface imprinted polymer (1)
- Surgical staplers (1)
- Survival analysis (1)
- Tank (1)
- Thiamine (1)
- Tomography (1)
- Toxicology (1)
- Trajectories (1)
- Transcendence (1)
- Transfer impedance (1)
- Transient flux distribution (1)
- Two-phase modelling (1)
- USP (1)
- Uniaxial compression test (1)
- Uracil-phosphoribosyltransferase (1)
- User study (1)
- Vapnik–Čhervonenkis class (1)
- Variable height stapler design (1)
- Vasomotions (1)
- Virtual reality (1)
- Vitamin A (1)
- Vitamin B (1)
- Voice assessment (1)
- Volterra integral equation (1)
- Weak organic acids (1)
- XOR (1)
- anaesthetic complications (1)
- barium strontium titanate (1)
- calorimetric gas sensor (1)
- coherent structures (1)
- constructive alignment (1)
- contactless conductivity sensor (1)
- dental trauma (1)
- difficult airway (1)
- double-lumen tube intubation (1)
- enzymatic (bio)degradation (1)
- examination (1)
- field-effect sensor (1)
- hiPS cardiomyocytes (1)
- high-k material (1)
- hydraulic modelling (1)
- impedance spectroscopy (1)
- in-situ monitoring (1)
- intraclass correlation coefficient (1)
- lable-free detection (1)
- long-term retention (1)
- magnetic actuation (1)
- magnetic separation (1)
- magnetic tweezers (1)
- magnetophoretic velocity (1)
- model performance (1)
- multi-functional material (1)
- multimodal (1)
- novel photoexcitation method (1)
- poly(d, l-lactic acid) (1)
- practical learning (1)
- shoulder (1)
- spatial resolution (1)
- standard error of measurement (1)
- sterilisation (1)
- stretch reflex (1)
- superparamagnetic bead (1)
- t-modules (1)
- test-retest reliability (1)
- tilted constant illumination (1)
- videolaryngoscopy (1)
We study the estimation of some linear functionals which are based on an unknown lifetime distribution. The observations are assumed to be generated under the semi-parametric random censorship model (SRCM), that is, a random censorship model where the conditional expectation of the censoring indicator given the observation belongs to a parametric family. Under this setup a semi-parametric estimator of the survival function was introduced by the author. If the parametric model assumption is correct, it is known that the estimated functional which is based on this semi-parametric estimator is asymptotically at least as efficient as the corresponding one which rests on the nonparametric Kaplan–Meier estimator.
In this paper we show that the estimated functional which is based on this semi-parametric estimator is asymptotically efficient with respect to the class of all regular estimators under this semi-parametric model.
This article describes the fabrication, characterization and application of an epidermal temporary-transfer tattoo-based potentiometric sensor, coupled with a miniaturized wearable wireless transceiver, for real-time monitoring of sodium in the human perspiration. Sodium excreted during perspiration is an excellent marker for electrolyte imbalance and provides valuable information regarding an individual's physical and mental wellbeing. The realization of the new skin-worn non-invasive tattoo-like sensing device has been realized by amalgamating several state-of-the-art thick film, laser printing, solid-state potentiometry, fluidics and wireless technologies. The resulting tattoo-based potentiometric sodium sensor displays a rapid near-Nernstian response with negligible carryover effects, and good resiliency against various mechanical deformations experienced by the human epidermis. On-body testing of the tattoo sensor coupled to a wireless transceiver during exercise activity demonstrated its ability to continuously monitor sweat sodium dynamics. The real-time sweat sodium concentration was transmitted wirelessly via a body-worn transceiver from the sodium tattoo sensor to a notebook while the subjects perspired on a stationary cycle. The favorable analytical performance along with the wearable nature of the wireless transceiver makes the new epidermal potentiometric sensing system attractive for continuous monitoring the sodium dynamics in human perspiration during diverse activities relevant to the healthcare, fitness, military, healthcare and skin-care domains.
Size unlimited markerless deletions by a transconjugative plasmid-system in Bacillus licheniformis
(2013)
Disruption experiments targeted at the Bacillus licheniformis degSU operon and GFP-reporter analysis provided evidence for promoter activity immediately upstream of degU. pMutin mediated concomitant introduction of the degU32 allele – known to cause hypersecretion in Bacillus subtilis – resulted in a marked increase in protease activity. Application of 5-fluorouracil based counterselection through establishment of a phosphoribosyltransferase deficient Δupp strain eventually facilitated the marker-free introduction of degU32 leading to further protease enhancement achieving levels as for hypersecreting wild strains in which degU was overexpressed. Surprisingly, deletion of rapG – known to interfere with DegU DNA-binding in B. subtilis – did not enhance protease production neither in the wild type nor in the degU32 strain. The combination of degU32 and Δupp counterselection in the type strain is not only equally effective as in hypersecreting wild strains with respect to protease production but furthermore facilitates genetic strain improvement aiming at biological containment and effectiveness of biotechnological processes.
Generally, the quality of a weld joint is directly influenced by the welding input parameter settings. Selection of proper process parameters is important to obtain the desired weld bead profile and quality. In this research work, numerical and graphical optimization techniques of the CO2 laser beam welding of dual phase (DP600)/transformation induced plasticity (TRIP700) steel sheets were carried out using response surface methodology (RSM) based on Box–Behnken design. The procedure was established to improve the weld quality, increase the productivity and minimize the total operation cost by considering the welding parameters range of laser power (2–2.2 kW), welding speed (40–50 mm/s) and focus position (−1 to 0 mm). It was found that, RSM can be considered as a powerful tool in experimental welding optimization, even when the experimenter does not have a model for the process. Strong, efficient and low cost weld joints could be achieved using the optimum welding conditions.
In this research work, a statistical analysis of the CO2 laser beam welding of dual phase (DP600)/transformation induced plasticity (TRIP700) steel sheets was done using response surface methodology. The analysis considered the effect of laser power (2–2.2 kW), welding speed (40–50 mm/s) and focus position (−1 to 0 mm) on the heat input, the weld bead geometry, uniaxial tensile strength, formability limited dome height and welding operation cost. The experimental design was based on Box–Behnken design using linear and quadratic polynomial equations for predicting the mathematical models. The results indicate that the proposed models predict the responses adequately within the limits of welding parameters being used and the welding speed is the most significant parameter during the welding process.
Bead-on-plate butt joints of 2.5 mm hot rolled DP600/DP600 and 1.2 mm cold rolled TRIP700/TRIP700 steel sheets were performed using 6 kW CO2 laser beam welding. The welding speed ranged from 1.5 to 3.0 and from 2.1 to 3.9 m/min in DP/DP and TRIP/TRIP steel weldments respectively. A top surface helium gas was used as a shielding gas at a flow rate of 20 l/min. Metallographic examinations and transverse tensile testing (DIN EN 895: 1995) were carried out to characterize the weldments. The formability of base metals and weldments were investigated by standard Erichsen test (DIN EN ISO 20482). It was found that the uniaxial plastic behavior of both DP600 and TRIP700 base metals was in agreement with Swift and modified Mecking–Kocks models respectively. In a perpendicular tensile test to the weld line, all specimens were fractured at the base metal however the strengths were somewhat higher than those of base metal. There was a significant reduction in formability caused by welding of both DP/DP and TRIP/TRIP steel weldments and the formability has been improved with the increase of the welding speed.
Shielding gas influences on laser weldability of tailored blanks of advanced automotive steels
(2010)
The effects of shielding gas types and flow rates on CO2 laser weldability of DP600/TRIP700 steel sheets were studied in this work. The evaluated shielding gases were helium (He), argon (Ar) and different mixtures of He and Ar. Weld penetration, tensile strength and formability (Erichsen test) of laser welds were found to be strongly dependent upon the shielding gas types. The ability of shielding gas in removing plasma plume and thus increasing weld penetration is believed to be closely related to ionization potential and atomic weight which determine the period of plasma formation and disappearance. It was found that the higher helium shielding gas flow rate, the deeper weld penetration and the lower weld width.
Concentrating solar power
(2012)
Solar thermal concentrated power is an emerging technology that provides clean electricity for the growing energy market. To the solar thermal concentrated power plant systems belong the parabolic trough, the Fresnel collector, the solar dish, and the central receiver system.
For high-concentration solar collector systems, optical and thermal analysis is essential. There exist a number of measurement techniques and systems for the optical and thermal characterization of the efficiency of solar thermal concentrated systems.
For each system, structure, components, and specific characteristics types are described. The chapter presents additionally an outline for the calculation of system performance and operation and maintenance topics. One main focus is set to the models of components and their construction details as well as different types on the market. In the later part of this chapter, different criteria for the choice of technology are analyzed in detail.