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

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Is there any tutorial for comsol general projections?

Hi, im trying to make a projection in a 3d comsol model. I have a non uniforme chanel and my intention is to get the average tempreture in the y-z cross section and se the average tempreture...

02 March 2021 4,624 4 View

Is it possible to do piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch?

How to do Piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch? Piezoelectric coupling between the rectangular substrate and rectangular...

02 March 2021 9,833 3 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

How to grow E.coli on the low salt LB agar plate with 50 or 100ug/ml of Blasticidin?

Hello, I would like to ask how to grow E.coli which resists 50 or 100ug/ml of Blasticidin. I have tried many methods by using low salt Luria-Bertain(LB) agar plate. However, no colonies grow. Let...

01 March 2021 2,027 2 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View

Concrete compressive strength databases?

I am looking for datasets similar to this one: http://archive.ics.uci.edu/ml/datasets/Concrete+Compressive+Strength I am looking for concretes with different types of aggregates (Recycled,...

27 February 2021 6,801 3 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View