Fraunhofer-Publica

The Fraunhofer-Publica has been successfully documenting the research results of the Fraunhofer-Gesellschaft for over 30 years. The platform enables the collaborative linking of research-relevant objects and disseminates within the international scientific community.

The Fraunhofer-Publica thus fulfils its responsibility to promote the transfer of knowledge and know-how to industry and society.

Research outputs

As an application-oriented research organisation, Fraunhofer aims to conduct highly innovative and solution-oriented research - for the benefit of society and to strengthen the German and European economy.

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Projects

Fraunhofer is tackling the current challenges facing industry head on. By pooling their expertise and involving industrial partners at an early stage, the Fraunhofer Institutes involved in the projects aim to turn original scientific ideas into marketable products as quickly as possible.

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Researchers

Scientific achievement and practical relevance are not opposites - at Fraunhofer they are mutually dependent. Thanks to the close organisational links between Fraunhofer Institutes and universities, science at Fraunhofer is conducted at an internationally first-class level.

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Institutes

The Fraunhofer-Gesellschaft is the leading organisation for applied research in Europe. Institutes and research facilities work under its umbrella at various locations throughout Germany.

Recent Additions

Variational Quantum Circuit Design for Quantum Reinforcement Learning on Continuous Environments

( 2024)
Kruse, Georg
;
Dragan, Theodora-Augustina
;
Wille, Robert
;
Lorenz, Jeanette Miriam

Quantum Reinforcement Learning (QRL) emerged as a branch of reinforcement learning (RL) that uses quantum submodules in the architecture of the algorithm. One branch of QRL focuses on the replacement of neural networks (NN) by variational quantum circuits (VQC) as function approximators. Initial works have shown promising results on classical environments with discrete action spaces, but many of the proposed architectural design choices of the VQC lack a detailed investigation. Hence, in this work we investigate the impact of VQC design choices such as angle embedding, encoding block architecture and postprocessesing on the training capabilities of QRL agents. We show that VQC design greatly influences training performance and heuristically derive enhancements for the analyzed components. Additionally, we show how to design a QRL agent in order to solve classical environments with continuous action spaces and benchmark our agents against classical feed-forward NNs.
16th International Conference on Agents and Artificial Intelligence, ICAART 2024. Proceedings. Vol.3

(SciTePress, 2024)
Rocha, Ana Paula
International Conference on Agents and Artificial Intelligence 2024
Die Datenschutz-Vorsorge (DS-V)

( 2024)
Boll, Alina
;
Selzer, Annika

Das neu vorgeschlagene Instrument der Datenschutz-Vorsorge soll unvorhersehbare personenbezogene Datenverarbeitungen rechtskonform ermöglichen. Der vorliegende Beitrag systematisiert dieses neu vorgeschlagene Instrument.

Most viewed

Laser pulse energy conversion on sequence-specifically bound metal nanoparticles and its application for DNA manipulation

( 2005)
Garwe, F.
;
Czaki, A.
;
Maubach, G.
;
Steinbrück, A.
;
Weise, A.
;
König, K.
International Solid-State Circuits Conference 1994
Measurement of Local Recombination Activity in High Diffusion Length Semiconductors

( 2023)
Heinz, Friedemann
;
Oezkent, Maximilian
;
Rittmann, Clara
;
Schindler, Florian
;
Schubert, Martin
;
Kwapil, Wolfram
;
Glunz, Stefan

We present a conceptual approach for the localisation and characterisation of local sites of recombination in high diffusion length semiconductors under photovoltaic field conditions. While established imaging techniques operate in this very regime of uniform "1 sun" illumination, inevitable lateral diffusion of charge carriers veils the origin and severity of localised recombination sites. To reduce this limitation due to lateral diffusion the natural choice is using focussed charge carrier excitation and detection in combination with scanning the specimen. The resulting photoluminescence intensity maps are of high spatial resolution and may be composed of a superposition of a multitude of recombination active defects influencing each other due to the high bulk diffusion length. We demonstrate the feasibility of a self-consistent calibration of the setup quantum efficiency in such experimental condition which delivers a charge carrier density map in absolute units. A solution is presented to disentangle the superposition of local sites of recombination to isolate the actual recombination activity of every site. We demonstrate the feasibility of the approach experimentally on the high diffusion length semiconductor silicon.
27th International Symposium on Ballistics 2013. Proceedings. Vol.1: Interior Ballistics, Exterior Ballistics, Launch Dynamics, Vulnerability & Survivability, Explosion Mechanics

(DEStech Publications, 2013)