Where I could find AE (AU, AL) index?

I used auroral electrojet indexes (AE, AU, AL) for the ionosphere modeling. However, there is no data at Kyoto WDC after February 28, 2018 (...

25 August 2020 1,532 12 View

Where to find Klobuchar model coefficients?

Could someone help in searching the coefficients for the broadcast GPS model? I was trying to take them from the BRDC navigation files at ftp://cddis.gsfc.nasa.gov/pub/gps/data/daily. However in...

03 October 2019 2,545 2 View

Could someone recomend a paper devoted to filtering the GNSS/GPS total electron contentent?

Ussually, we use running average to detrend total electron content (TEC) data from GPS(GNSS) and to filter required period range. Could someone recomend a paper devoted to comparison of different...

25 October 2018 7,399 2 View

I am working with DNA extraction from bacteria in corn silage, however the DNA yield are too low (<10 ng/ul), it is a normal yield?

We are working with different fermentation times of silage, when extracted DNA at time 0 yield >100ng/ul but at time 140 days yield

23 July 2018 4,279 3 View

What is the best way to calculate the gap distance between two electrodes for a breakdown voltage 10V?

I need something like Paschen curves but for low voltages

10 October 2013 6,327 6 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

How can we limit artifacts caused by rotation in fiber photometry?

We are trying to run fiber photometry experiments for long time scales, but we get these sinusoidal artifacts that come up. We think they may be caused by twisting of the fiber optic subject...

25 February 2021 568 1 View

Can I use TCA instead of TFA for protein analyis in RP-HPLC?

I am trying to analyze lipase using the reverse phase-HPLC C18 column. In the literature, 0.1 % TFA was and 60% ACN was used. Can I use TCA in place of TFA? If any other methods are available to...

25 February 2021 2,388 3 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

Please. Could you help be in implementing Fractal Discrete Cosine Transform algorithm in Matlab?

I do need the Matlab code of Fractal Discrete Cosine Transform (FDCT). Can anyone who has already implement this code, help me with the implementation of this transform?

24 February 2021 5,602 2 View

I have need of XRD graph analysis software for phase identification. Can you please provide links for software tools which can be downloaded?

i am trying to download x'pert high score software, but can't download it. please do suggest software for phase analysis

24 February 2021 5,687 4 View

What is the error of the Txy diagram?

Hi, I know the attached Txy diagram has an error but can't figure it out. Could you please look at the diagrams and explain it to me?

23 February 2021 4,239 1 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View