Results 21 to 30 of about 22,152 (50)

High-sensitivity quantum sensing with pump-enhanced spontaneous parametric down-conversion

APL Photonics, 2023
Recent years have seen the development of quantum sensing concepts utilizing nonlinear interferometers based on correlated photon pairs generated by spontaneous parametric down-conversion (SPDC).
Chiara Lindner, Jachin Kunz, Simon J. Herr, Jens Kießling, Sebastian Wolf, Frank Kühnemann   +5 more
doaj   +1 more source

Motion compensation for interferometric off-center measurements of rotating objects with varying radii

APL Photonics, 2019
Interferometric 3D metrology on arbitrarily moving objects is possible if the reference phase is adapted to match the object speed. We show this theoretically for rotation with constant angular velocity and provide experimental results for off-center ...
Annelie Schiller, Tobias Beckmann, Markus Fratz, Alexander Bertz, Daniel Carl, Karsten Buse   +5 more
doaj   +1 more source

Electrocaloric cooling system utilizing latent heat transfer for high power density

Communications Engineering
Electrocalorics (EC) is potentially more efficient than refrigeration and heat pumps based on compressors and does not need detrimental fluids. Current EC-prototypes use solid-state contact or forced convection with liquids to transfer the heat generated
Julius Metzdorf, Patrick Corhan, David Bach, Sakyo Hirose, Dirk Lellinger, Stefan Mönch, Frank Kühnemann, Olaf Schäfer-Welsen, Kilian Bartholomé   +8 more
doaj   +1 more source

Immobilization Techniques for Aptamers on Gold Electrodes for the Electrochemical Detection of Proteins: A Review

Biosensors, 2020
The development of reliable biosensing platforms plays a key role in the detection of proteins in clinically and environmentally derived samples for diagnostics, as well as for process monitoring in biotechnological productions.
Franziska V. Oberhaus, Dieter Frense, Dieter Beckmann   +2 more
doaj   +1 more source

Fully Automated Segmentation of 2D and 3D Mobile Mapping Data for Reliable Modeling of Surface Structures Using Deep Learning

Remote Sensing, 2020
Maintenance and expansion of transport and communications infrastructure requires ongoing construction work on a large scale. To plan and execute these in the best possible way, up-to-date and highly detailed digital maps are needed.
Alexander Reiterer, Katharina Wäschle, Dominik Störk, Achim Leydecker, Niko Gitzen   +4 more
doaj   +1 more source

Multi-Perspective Anomaly Detection

Sensors, 2021
Anomaly detection is a critical problem in the manufacturing industry. In many applications, images of objects to be analyzed are captured from multiple perspectives which can be exploited to improve the robustness of anomaly detection.
Peter Jakob, Manav Madan, Tobias Schmid-Schirling, Abhinav Valada   +3 more
doaj   +1 more source

Simulation model for the evaluation and design of miniaturized non-resonant photoacoustic gas sensors [PDF]

Journal of Sensors and Sensor Systems, 2016
This publication reports the derivation and the implementation of a simulation model that describes non-resonant photoacoustic gas sensors. The photoacoustic effect is modelled in detail for the successive steps of radiation emission, stimulation of ...
J. Huber, K. Schmitt, J. Wöllenstein
doaj   +1 more source

Reducing Training Data Using Pre-Trained Foundation Models: A Case Study on Traffic Sign Segmentation Using the Segment Anything Model

Journal of Imaging
The utilization of robust, pre-trained foundation models enables simple adaptation to specific ongoing tasks. In particular, the recently developed Segment Anything Model (SAM) has demonstrated impressive results in the context of semantic segmentation ...
Sofia Henninger, Maximilian Kellner, Benedikt Rombach, Alexander Reiterer   +3 more
doaj   +1 more source

Colorimetric Materials for Fire Gas Detection—A Review

Chemosensors, 2018
The damage caused by outbreaks of fire continues to be enormous despite ongoing improvements in fire detection and fighting. Therefore, the detection of fires at the earliest possible stage is essential.
Katrin Schmitt, Karina R. Tarantik, Carolin Pannek, Jürgen Wöllenstein   +3 more
doaj   +1 more source

First Isolation and Structure Elucidation of GDNT‐β‐Glu – Tetraether Lipid Fragment from Archaeal Sulfolobus Strains

ChemistryOpen, 2021
Due to their special chemical structure, tetraether lipids (TEL) represent essential elements of archaeal membranes, providing these organisms with extraordinary properties.
Dr. Alexander Scholte, Christoph Hübner, Dr. Dieter Ströhl, Olaf Scheufler, Dr. Steffen Czich, Julia M. Börke, Dr. Gerhard Hildebrand, Prof. Dr. Klaus Liefeith   +7 more
doaj   +1 more source