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[IEEE 2018 Conference on Design and Architectures for Signal and Image Processing (DASIP) - Porto, Portugal (2018.10.10-2018.10.12)] 2018 Conference on Design and Architectures for Signal and Image Processing (DASIP) - Real-Time Analysis of Living Biological Cell Activity
摘要： This demo shows a computing system able to process data from electrophysiology cultures in real-time. It is the first one able to identify eventual relationship among living cells from the cell activity signals. The hardware demonstrator is able to acquire data from 64 analog signals sampled at 10kHz, but the computing architecture is flexible enough to provide various number of input electrodes depending of its configuration. Most of the parameters are user definable without reconfiguration to ensure the usability of the system for real-life biology experiment.
关键词： biological cell activity,FPGA,HLS,electrophysiology,spike detection,inter-channel correlation,real-time analysis
更新于2025-09-23 15:23:52
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Fourier transforms for fast and quantitative Laser Speckle Imaging
摘要： Laser speckle imaging is a powerful imaging technique that visualizes microscopic motion within turbid materials. At current two methods are widely used to analyze speckle data: one is fast but qualitative, the other quantitative but computationally expensive. We have developed a new processing algorithm based on the fast fourier transform, which converts raw speckle patterns into maps of microscopic motion and is both fast and quantitative, providing a dynamnic spectrum of the material over a frequency range spanning several decades. in this article we show how to apply this algorithm and how to measure a diffusion coefficient with it. We show that this method is quantitative and several orders of magnitude faster than the existing quantitative method. finally we harness the potential of this new approach by constructing a portable laser speckle imaging setup that performs quantitative data processing in real-time on a tablet.
关键词： Fast Fourier Transform,Real-time Analysis,Quantitative Imaging,Laser Speckle Imaging,Microscopic Motion
更新于2025-09-12 10:27:22
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In situ FTIR reactor for monitoring gas phase products during a (photo)catalytic reaction in the liquid phase
摘要： Various catalytic and photocatalytic reactions in the liquid phase give rise to gas products. Therefore, the identification and quantification of these products are of high importance and even essential for some reactions. In this communication, a new in situ FTIR reactor is designed and used for analyzing the gas headspace of a (photo)catalytic reaction in solution. It allows the identification and quantification of the gas products of a liquid reaction under operating conditions and in real time. The new reactor has been tested in three representative photocatalytic reactions widely studied as model reactions in the liquid phase, i.e., i) decomposition of formic acid, ii) oxidation of Methylene Blue and iii) reduction of CO2. The validity of the results has been confirmed by analyzing the headspace at the end of the reaction using GC. The new reactor opens the possibility to follow on-line the (photo)catalyst activity. This is useful for ensuring the stability of the catalyst and studying the evolution of the selectivity during the reaction. The non-destructive behavior of the FTIR technique allows its coupling with other techniques for obtaining complementary results. The new reactor setup is easy to handle, to ship, and is very efficient which make it very suitable for performing fast and/or preliminary studies.
关键词： gas phase products,photocatalytic reaction,liquid phase,real-time analysis,FTIR reactor
更新于2025-09-10 09:29:36