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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

  • Publication
    Electrocaloric temperature changes in epitaxial Ba1-xSrxTiO3 films
    ( 2022)
    Magalhaes, Bruno
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    Engelhardt, Stefan
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    Nielsch, Kornelius
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    Hühne, Ruben
    The basic aim of our study is to investigate the correlation between structural parameters and the electrocaloric effect in lead-free epitaxial Ba1-xTiO3 (BSTO) based thin film architectures. Therefore, BSTO thin films with Sr contents of x = 0 to x = 0.3 were grown on SrRuO3 buffered SrTiO3 single crystalline substrates by pulsed laser deposition. Structural characterization verified an epitaxial growth for all Sr contents with an additional tetragonal distortion compared to bulk material. Temperature and frequency-dependent measurements of dielectric properties revealed increased permittivity values for thicker films with broad maxima indicating a diffuse phase transition. The temperature of maximum permittivity decreases with increasing Sr content, whereas polarization measurements indicate a relaxor-like behaviour in particular above room temperature. Adiabatic temperature changes were determined with the indirect method resulting in |ΔT| values of up to 2.9 K for a 680 nm thick BSTO layer with x = 0.3 at an applied electric field of 750 kV cm-1.
  • Publication
    Automatic Analog Design and Layout Generation: Chances and Hurdles
    ( 2022-10-11)
    To this day, analog circuits elude comprehensive layout synthesis and therefore still have to be designed manually. Due to shrinking to ever more advance nodes as well as due to increasing design complexity, the pressure on analog designers is immense and growing. Despite a variety of improvements in design environments, full analog automation is still in its infancy. One promising approach – besides synthesis methods - applies procedural methods and specifically generators in the design process. Generators create design data automatically in an often (but not always) PCell-like way. Novel cross-technology concepts allow generators to be technologies-agnostic, too. Thus, they not only systematize the design process and shorten design time, generators also open up the possibility of analog design reuse across design projects. Especially when requirements and/or target technologies change, design efficiency can be significantly increased. However, generators are not “for free”. They become effective when applied to the right sweet spot. For example, the initial development efforts will pay off when applied on a broader project view that considers, e.g., a product family or when applied to repetitive or human-unfriendly tasks. This requires both some degree of re-thinking the design approach as well as close cooperation between analog designers and EDA developers. The keynote will first briefly introduce design problems of analog integrated circuits and present current approaches to solve them. This is followed by a closer look at design automation concepts, especially generators that enable the development of cross-technology layout generators. Afterwards, the talk discusses chances and hurdles when applying the generator-based approach in real design projects. An outlook on possible further steps towards a re-use-oriented and highly automated analog design flow concludes the talk.
  • Publication
    Quantum Hologram Distillation
    ( 2022)
    Fuenzalida, Jorge
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    Töpfer, Sebastian
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    Torres, Juan Pérez
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    A recent holography technique based on induced coherence has been introduced. The technique uses photon pairs wherein one of them illuminates the object, and its partner is detected. The photon illuminating the object is never detected. Here we present a novel technique to distill a hologram with undetected photons.

Most viewed

  • Organizational Unit
  • Journal
  • Publication
    Tongue pressure and oral conditions affect volatile release from liquid systems in a model mouth
    ( 2012)
    Benjamin, O.
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    Silcock, P.
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    Buettner, Andrea
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    Everett, D.W.
    The release of volatile organic compounds (VOCs) into the mouth cavity is an integral part of the way flavor is perceived. An in vitro model mouth with an artificial tongue was developed to measure the dynamic release of VOCs from liquid model systems [e.g., aqueous solution, oil, and oil-in-water (O/W) emulsions] under oral conditions. The release of seven selected VOCs was affected by the different polarity and vapor pressure of the compounds and their affinity to the liquid system media. Different tongue pressure patterns were applied to the liquid systems, and the release of VOCs was monitored in real time using proton transfer reaction-mass spectrometry. The release was significantly more intense for longer tongue pressure duration and was influenced by the tongue altering the sample surface area and the distribution of the VOCs. The role of saliva (artificial versus human) and the sample temperature had a significant effect on VOC release. Saliva containing mucin and a higher sample temperature enhanced the release.
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