Age of the Isimila Prehistoric Site in Tanzania?

Does anyone knows results from the new dating program from the Isimila Prehistoric Site in Tanzania?- of course without to give away too much, before a final publication. The data of ca 260...

03 February 2021 6,864 3 View

How to apply graphene oxide on an gold electrode?

Dear Fellows, now it is the time to push graphene applications further in terms of easy and low cost production surroundings. Thus I recently dived in the materia and I am facing tons of papers,...

02 February 2021 6,284 2 View

Is there any tool or database to identify unknown materials using Raman Spectroscopy?

Hello, I'm loonking for some online tool or database where I can identify for me unknown materials using the wave number of Raman peaks and maybe including some filtering using elements. Do you...

08 January 2021 3,227 5 View

Matlab: train random forest with time series? How to transform time series data to a supervised learning dataset?

Hey, I've build random forest using Matlab Machine-Learning Toolbox Function (treeBagger). I've computed several kinematic features like velocity or acceleration as predictors (24 predictors) for...

22 December 2020 2,638 3 View

How to calculate the dissipated power in a semiconductor?

If I am dealing with a simple conductor that follows Ohm's law I can take the dissipated electrical power for a DC current running through the conductor as P = U*I. However, I think that this...

30 August 2020 4,747 4 View

Are there any promising approaches for deep learning for classifications based on very small data sets?

Hi, I am looking for deep learning approaches to pattern recognition on very small data sets. Previous attempts using convolutional neural networks have been far less powerful than common machine...

24 April 2020 1,411 6 View

How can I determine a measure for the similarity between two time series?

I am looking for a way to compare two time series and to find a measure of similarity between them. Previous ideas were to compare the distance between both series and to count the number of...

19 April 2020 5,577 20 View

Has anyone experience with dry electrodes for EEG / EVP / ERP?

Hi, has anyone good experience with dry EEG electrodes, e.g. from ANT, for EVP/EEG recordings? I have read that impedance is much higher compared to wet electrodes. Thanks - Johannes

13 April 2020 7,306 4 View

Examples of overfitting to reporter assay through directed evolution?

Let's say you're developing an enzyme to catalyze a certain reaction. But the progress of this reaction is only measurable through e.g. fluorescently labelled substrate analogs, i.e. not actually...

24 March 2020 7,856 3 View

Hi, i need help with ANSYS FLUENT evaporation simulation?

i am trying to simulate a solar drying chamber in Ansys Fluent. Hot air enters the chamber and inside the chamber there are products with high moisture content. The hot air need to carry the...

20 September 2019 8,952 2 View

How can one define the modes of dispersion curve numerically?

Dear all, I am trying to find a way to find dispersion curves of plates using Rayleigh-Lamb frequency equations. I used a repetitive procedure by sweeping through the frequencies and inside it...

25 November 2020 7,254 5 View

Can anyone recommend a NDT to analyze the status of W-mesh heating elements of the furnace?

In the metallurgical lab we are used to working with destructive testing methods to characterize the properties of the different elements/parts, but sometimes it comes to analyze functional parts...

26 August 2020 5,890 3 View

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09 October 2019 9,258 2 View

Using abaqus, How to excite a plate with pure mode S0???

Using abaqus, How to excite a plate with pure mode S0???

08 September 2019 5,866 1 View

Where does this extra wave come from?

Using Abaqus, I am trying to generate symmetric lamb wave mode in a simple Aluminum plate by applying symmetric point force parallel to the plate. The extra wave followed by the S0 mode appears...

08 September 2019 5,190 3 View

Where does this extra wave come from?

Using Abaqus, I am trying to generate symmetric lamb wave mode in a simple Aluminum plate by applying symmetric point force parallel to the plate. The extra wave followed by the S0 mode appears...

03 September 2019 7,247 5 View

Which FEA software is good for fracture analysisbin different conditions like :- corrosion,pitting,SCC,multiple cracks,fatigue test, UT NDT, AE NDT?

I want to model a scenario in FEA software for corrosion fatigue testing and detection of nucleation of cracks using Acoustic emission NDT and UT NDT. So, for this application which FEA software...

07 August 2019 9,732 2 View

Which NDT methods is the most effective technique for assessing the the steel stands(to know the exact cross section of the steel which is corroded ?

Which NDT methods would be the most effective techniques for assessing grouted pre-stressed cable ducts in post-tensioned bridge decks in oder to determine the loss in cross-sectional area of the...

05 June 2019 2,607 4 View

What is the difference between ultrasound or ultrasonic wave propagation in elastic and viscoelastic materials (concrete VS bituminous mixtures) ?

Good Morning, I am looking in NDT test such as ultrasound in bituminous mixtures, which is a special materials with viscoelastic behavior, this viscosity provide a delay between force applied and...

02 March 2019 7,054 3 View

What is the difference between ultrasound or ultrasonic wave propagation in elastic and viscoelastic materials (concrete VS bituminous mixtures) ?

Good Morning, I am looking in NDT test such as ultrasound in bituminous mixtures, which is a special materials with viscoelastic behavior, this viscosity provide a delay between force applied and...

01 March 2019 8,335 3 View