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

Do we have any empirical model to model the combined effect of carbonation and chloride attack in concrete concerning climate change?

Do we have any empirical model to model the combined effect of carbonation and chloride attack in concrete concerning time-dependent temperature, relative humidity and concentration of carbon dioxide?

08 February 2021 4,277 1 View

How to estimate total electron content using GPS data (with MATLAB)?

06 January 2021 1,110 2 View

How to add two vertical and parallel Fresnel reflection coefficients to retrieve overall reflection coefficient for a right hand circular wave?

I have a problem in which a right hand circular polarized wave (GPS wave) encounters an ideal smooth plane obliquely, and then is reflected off that. To solve this kind of problems, the wave is...

28 December 2020 2,271 3 View

How does one subset time series GPS data to to 1 hour intervals?

I have time series GPS tracking data from a number of individuals, all with varying time between locations (i.e. certain individuals recording at 15 minutes intervals, others at 20 minutes or 1...

06 December 2020 9,038 3 View

What are the different units of determining the concentrations of gases in ambient air?

Gases in ambient air are measured in various units. Like ppm, ppb, percentages, microgtam per cubic meter etc. What are these exactly? I am new to the air field. earlier I worked with soil and...

27 November 2020 3,908 1 View

Is there a way to implement Kalman filter on three dimensional GPS data to remove noisy data?

I am trying to implement Kalman filter to get rid of multipath error points on GPS data while my data contains Latitude, Longitude, accuracy, altitude, speed and time. I am using python but unable...

01 November 2020 8,837 3 View

Can anyone suggest some cheap GPS data loggers with atleast 2-3 days battery backup for boat surveys?

We want to conduct a boat survey and need to track the trajectory and need to register the location and time of animal sightings. The logger should have a decent battery life, at least for 3 or...

14 October 2020 4,711 8 View

Available datasets for occupational skin diseases?

Hi, is there any dataset about occupational skin diseases (especially skin cancers) that contains skin lesions images (simple or dermoscopic or histologic) ,integrated with clinical data and...

10 October 2020 3,301 4 View

Does anyone have experience with movement-based kernel density estimation (MKDE)?

Hello, I have mapped the locations of several individuals of a certain species of bird. I have the GPS coordinates, the date and the time data every half hour for several consecutive days and I am...

26 September 2020 3,712 2 View

Why do some informal settlements and societies successfully adjust and even thrive amid adversity while others fail to do so?

Many informal settlements have insufficient capacity to forecast, check, handle and reduce disaster risk. These communities face a growing range of challenges including economic hardship,...

23 July 2020 3,511 8 View