When Correlation is high and RMSE is High too- How to select good model ?

Dear all, I wanted to evaluate the accuracy of a model using observation data. My problem is the correlation of the model with observed data is really good (bigger than 0.7) but RMSE is very high...

02 November 2020 9,005 3 View

How to locate nodes in mass or stiffness matrix?

I've extracted mass and stiffness matrices from a modal analysis in Ansys. I need to know how the elements of each matrix is related to node ID. Anyone can help me with an ansys command to find...

11 September 2020 9,462 4 View

How to visualise a journal issue?

Dear all, One of my friends is a editor in chief of a geospatial journal and he asked me to visualise the recent issue of the journal for publishing on the journal website. I have some ideas, for...

22 July 2020 6,275 4 View

Why does the Editor reject the article based on only one reviewer's comments?

Hi everyone, I submitted two of my papers to a well-established journal in Elsevier. However, in both cases, the Editor rejected the papers based on the comments of only 1 reviewer without asking...

02 April 2020 3,210 19 View

Where should I register my systematic review and meta-analysis?

Dear colleagues, Is it alright to register a systematic review and meta-analysis (focusing on human health studies) with the International Platform of Registered Systematic Review and...

25 March 2020 5,382 9 View

Why Aluminum powders color sometimes change after Ball Milling?

Dear viewers, I am working on ball milling of Aluminum powders for a couple of years and a question yet not answered to me is that "why sometimes- not always or so many- I encounter a color change...

24 March 2020 2,237 6 View

Hi, I need to simulate an LPG in fiber by COMSOL. is there any step-by-step manual for this purpose?

Hi, I need to simulate an LPG in fiber by COMSOL. is there any step-by-step manual for this purpose? thanks for any help in advance

18 March 2020 728 3 View

Does the scanning rate affect the degree of crystallinity?

Hi every one, I wonder if the DSC heating rate affects the degree of crystallinity in semi-crystalline polymers? thanks

25 January 2020 8,884 7 View

How to make nutrient broth to grow rhizosphere bacteria in it? It will be good if i get a robust protocol?

i want to grow rhizosphere bacteria on nutrient broth and subsequently check their growth through OD. I need a robust protocol that can tell me all the details about conducting this experiment.

23 January 2020 4,734 3 View

Is any particular rule exist for fill and use missing included climate station for rainfall and precipitation?

Is there any particular rule that told us in what condition we allowed to rebuilding missing data in a synoptic station? For example, if a station has 15% missing data over 30 years, can it be...

20 January 2020 3,843 5 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Which database would give me this list of chemical components?

Dear colleagues: I would like to know if anyone knows of a database that gives me the parameters pH, K, K, Mg, P, C, N, Zn, Cu, Ni and Cd of common foods. I find a lot of information of proteins,...

26 February 2021 5,525 3 View

Why is NH4OH added in heavy metals limit test?

The limit test I'm referring to is USP method II. In this procedure you need to dropwise add 6N of NH4OH to the sample until it the pH is alkali. After that you need to dilute and add HOAc until...

23 February 2021 2,049 3 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View

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22 February 2021 9,932 11 View

Can anyone help or comment on solubilising chlorobutanol in aqueous injections in minimum time possible?

Please suggest solubilisation of chlorobutanol in injections. Tried pH and high temperature. But the issue is of assay drop. If anyone can suggest any solution. Its a commonly used excipient for...

21 February 2021 7,397 1 View

What reaction will occur when adding hexamine into ammonium nitrate in an acidic medium?

Hello, I am investigating properties of water in oil emulsion explosives. And adding hexamine (hexamethylenetetramine) into one of the phases that are used to make the emulsion should increase the...

21 February 2021 8,680 1 View

What properties of water shall be analyzed and evaluated to test the effectiveness of activated carbon?

I would like to ask what other properties of water (pH and such) shall be analyzed and evaluated to test the effectiveness of activated carbon from filtering the contaminants present in the water?

20 February 2021 9,422 8 View

Phenol-pH graphic?

We want to use phenol pH graphic to measure the pH of mediums before and after inhibitor application to cells. We have phenol absorbence values at 460, 560 and 720 nm wavelength. When we measure...

20 February 2021 7,700 3 View

How to measure the pH of Peat Soil?

Peat possess organic content above 75% and is highly acidic in nature (i.e. pH < 4). Before commencing stabilization, it is mandatory to know about the pH level of peat. Therefore, your...

18 February 2021 9,424 7 View