I need dataset for recommandation system?

Hi every body I need to collect datasets from different source to work on recommendation system algorithms, could you advise me how collect data?

27 February 2021 7,063 7 View

How can I plot MODIS HDF-EOS grid images into geographic coordinates (lat-lon)?

I'm analyzing Madis products (MCD64A1), when I finish my analysis, I have a 2400X2400 matrix that I want to draw, but since the original image was in sine design, when using From imagesc, draws...

14 January 2021 6,534 2 View

Geographic location of MCD64A1 images in hdf format"?

Is the lat, lon (geographical location) extracted from the MCD64A1 images in hdf format accurate, or should they be converted to the exact location because they are sinusoidal?

31 December 2020 4,988 3 View

Data set for customer baseline load (CBL) estimation?

23 December 2020 6,739 2 View

Output of rankMANOVA in R?

Dear all, I am working on data including two responses (count data, relatively correlated~R2=0.4, non-normal distribution, and violated the homogeneity of covariance) and three independent...

26 November 2020 711 3 View

As an EFL/ESL English teacher has your professional identity changed in any way during this time of virtual teaching?

Since teacher professional identity is ever changing and not fluid, do you feel as an English teacher your identity has in any way changed due to online teaching? Are you the same person when...

14 November 2020 7,788 11 View

For modifying of dna probe, which end of strand dna is better to modify, the end of 3 pime or 5?

Electrochemical microrna biosensor

01 November 2020 5,271 1 View

How has the Covid pandemic affected your classes as an English teacher? Have you been forced to switch to online teaching instead of f2f teaching?

I am interested to know how has English teachers' working conditions changed due to the pandemic and how they are coping with the new situation.

12 October 2020 1,803 1 View

What is the effect of Ascorbic acid in the synthesis of Au nanorods?

I prepared seed solution with HAuCl, CTAB, and NaBH4, after this growth solution with HAuCl4, CTAB, AgNO3, and Ascorbic acid. In the end step, I added Ascorbic acid in growth solution and solution...

17 August 2020 7,506 3 View

Is it possible to image transparent tissue using dark-field microscopy?

I was wondering whether it is possible to image transparent tissue like cornea, with dark-field imaging technology? I'd appreciate any help :)!

29 October 2019 8,301 1 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

What could be the reason for not having further low chi square value (better agreement) in my refinement result?

I have tried every combination of parameter changes and after that i have a poor chi square value. I can't get it lower any further. I know there have been a lot of discussion about Rietveld...

26 February 2021 8,480 3 View

How to replicate the well conditions of a crystal hit with 20%(w/v) isopropanol?

I had a crystal hit in a well with 0.1M HEPEs pH 7.5, 10%(w/v) PEG 4000, and 20%(w/v) isopropanol. Why is isopropanol in w/v here if it's just solvent? How do I recreate this well condition?

25 February 2021 9,761 1 View

Mixture neutralization after Boc deprotection ?

I am performing a Boc-deprotection with HCl in organic solvent (dioxane or Ethylacetate) but would like to isolate the free amine. Several problems: - Neutralizing with inorganic base as NEt3...

18 February 2021 3,366 3 View

Is there a way to tell based on appearance which protein crystal should diffract the best?

I have had unheard of success with protein crystallography lately from a super successful protein expression and purification batch. I have attained a lately reproducible vast amount of crystals...

09 February 2021 5,155 5 View

Ligands with 3,4,5-trihydroxyphenyl group?

Hi In the design of a bidentate ligand with imine group, is it okay to have a 3,4,5-trihydroxyphenyl group in the structure? In other words, does the 3,4,5-trihydroxyphenyl group compete with...

08 February 2021 4,977 7 View

Electron density difference maps(Fo-Fc): what is the meaning of negative densities (red blobs)?

Dear community, As far as I understand, negative density features point at stuff that is in the model, but not supported by experimental data. However, in many cases (e.g. attached image), when...

06 February 2021 2,847 2 View

How do microbes tell the presence of an inorganic minaral in the soil?

Due to their ubiquitous nature, there is a tendency of the presence of microbes in a given mineral(s). For instance, if microorganisms that love the of pH less than 6 in the pH value, is isolated...

03 February 2021 4,630 10 View

For Carbon-emission free steelmaking by electrolysis with nonoxidizable electrode in EAF, what would be electrode material?

While CCS can be employed along with a conventional Carbon-efficient EAF steelmaking process (especially from iron ore) or even Hydrogen or hydrocarbon can bee passed through central electrode,...

30 January 2021 3,378 1 View