How to calculate the amount of Hedenbergite and Johannsenite from the EPMA analyses of pyroxene mineral?

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How To Define An Initial Current For A Coil In Magnetic Fields Physics?

I'm simulating a coil with voltage source. How to define the coil initial current so that I don't need to wait for the transient period to finish? Or how to initiate the time stepping solution...

15 May 2024 509 0 View

Statistical test that compare 2 areas under the curve in ROC curve analysis?

ROC curve analysis to detect the best cut-off of the independent variables in the prediction models

12 May 2024 8,423 4 View

Prediction curves , what is new?

how to do calibration curves for the prediction models in SPSS, i think it is important in addition to the external validation

26 April 2024 2,037 3 View

What is the agricultural area using center-pivot irrigation in Egypt and how many center-pivot irrigation devices are there?

area using center-pivot irrigation in Egypt Number of center-pivot irrigation devices

16 February 2024 1,376 0 View

Is there any reference for blood grouping in experimental rats?

How could we differentiate between blood groups in rats?

31 January 2024 3,915 1 View

Where should I put the decimal after weighting the data from NHANES database?

I am conducting a cross-sectional study from NHANES database. I used the "Full.sample.2.year.interview.weight" to weight the data. However, I do not know where should I put the decimal to finish...

10 January 2024 10,034 3 View

Inquiry about sleeping quality scale for free?

I want to know a scale measure sleeping quality but need no fees to use it and I want it to be available in Arabic version so can anyone help to recommend me a sleeping quality scale that is for...

03 November 2023 6,301 0 View

Peace be upon yu. I would like an answer to: How to use artificial intelligence and (its sites) to support and support research that studies economic?

Peace be upon you. I would like an answer to: How to use artificial intelligence and (its sites) to support and support research that studies economic, financial and monetary affairs and aspects?

21 October 2023 8,630 0 View

How can I compare percentages from different groups with different sample sizes?

I would like to compare the percentage of slices which show gamma oscillations with the percentage of other slices from different conditions which also show gamma taking into consideration that...

08 October 2023 9,421 6 View

Does anyone knows a reliable entity to develop a Patient-derived xenograft (PDX) model for hepatocellular carcinoma? and an estimated cost for that?

Does anyone know a reliable entity to develop a Patient-derived xenograft (PDX) model for hepatocellular carcinoma? and an estimated cost for that? I would appreciate it a lot if you could send...

07 October 2023 1,541 0 View

How can I prepare virus for a TEM or SEM imaging?

I have virus (viral hemorrhagic septicemia virus) in suspension and the experiment will not involve cells. What level of TCID50 is preferred?

11 August 2024 3,115 1 View

1. If I can quantize the atom using this hyperbolic spiral and classical physics, could nature do the same?

If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...

07 August 2024 5,343 2 View

Is there anyone with experience in TEM analysis who can assist with a manuscript for an upcoming journal?

Hello dear colleagues, We have prepared a manuscript on NiTi-based alloys and are seeking a second opinion on our current TEM results. If you are a Ph.D. holder with experience in TEM and have...

07 August 2024 9,563 0 View

How can we differentiate between calcite, dolomite, siderite, magnesite and ankerite minerals in carbonatite rocks in thin section under op microscop?

How can we differentiate between calcite, dolomite, siderite, magnesite and ankerite minerals in carbonatite rocks in thin section under optical microscope?

07 August 2024 2,132 3 View

Which distribution type should I use when calculating the average particle size from TEM image? and how to calculate the error ?

average particle size calculation from TEM

04 August 2024 2,921 1 View

Why reactivity isn't increased with more empty spots in valence shell?

If from a geometric perspective the non-halogens, non-noble gases have more empty spots in their valence shell, and the filling/exiting of any of the empty spots in the shell constitutes a...

03 August 2024 4,787 2 View

Why is the molecule's orientation with an electric field affect polarizability?

Why is the molecule's orientation with an electric field affect polarizability? Electrons are diffuse enough to be independent with respect to orientation and effect of electric field on...

03 August 2024 7,843 1 View

Why doesn't chromium 2+ ion use all its d-orbitals to receive lone pairs from six waters in [Cr(H20)6)]3+?

I'm guessing it's because the ligand experiences too much electron repulsion or proton repulsion from the chromium to insert them close to the 3d-orbitals which are close to the metal nucleus. Is...

03 August 2024 1,370 1 View

Is it necessary to covary exogenous constructs in a structural model?

I am working on a SEM model where i have 7 latent variables (6 exogenous and 1 endogenous). In AMOS when I co-vary the exogenous constructs, only 2 paths are coming significant out of 6. But when...

03 August 2024 6,028 4 View

Why aren't most metal oxides insoluble in water?

Why BaO (s) + H2O(l) ---> Ba 2+(aq) + 2 OH - (aq) if Oxygen loves owning all the electrons, why would it bind to hydrogen which competes with Oxygen for electron ownership more so than...

03 August 2024 5,392 1 View