Sreeja S.

16 Questions 42 Answers 0 Followers

Questions related from Sreeja S.

Why is there a loss of information in the below mathematical operation?

To elaborate: If X = (convolution of p(a), q(a) ,r(a))/(convolution of p(a), q(a)) Y = (convolution of p(a), q(a) ,s(a))/(convolution of p(a), q(a)) Why is X almost equal to Y even if...

09 September 2019 7,902 5 View

Why is the standard colour temperature for Daylight 6500 K?

Isn't 6500 K bluish? To me daylight looks yellowish. We've all coloured the sun and sunlight as yellow since we've been kids. Someone please explain why 6500 K is standard. Is it something that...

09 September 2019 1,022 4 View

Has anyone come across any study of the varying spectrum, colour and CCT of daylight at various geographic locations/conditions?

CCT = Color Correlated Temperature Please provide references. Preferably for tropical regions. Thanks in Advance

09 September 2019 4,000 10 View

Can someone explain how the size of the tolerance ellipsoids in the Lab space was defined?

Were they experimentally derived based on color perception from human subjects or can the size of the tolerance ellipsoid for every "color" be mathematically calculated for every point in the 3D...

08 August 2019 6,213 2 View

Can someone physically explain the conversion PROCESS of RGB color space to XYZ color space and LAB color space?

06 June 2019 6,222 16 View

How to convert RGB values to their corresponding colors and their dominant wavelengths in MATLAB?

I understand there's a challenge in the conversion as the colors are not monochromatic and there could be metamerism. I just want an approximation for the purpose of visualization of data.

05 May 2019 5,151 12 View

How do you define and measure human error in experiments?

For eg. sample variability in different solar cells (which are of identical configurations) fabricated manually.

09 September 2018 6,921 10 View

What is the colour of silver nanoparticles?

What would be the colour if AgNPs of sizes 50 nm - 80 nm, along with bigger aggregates are present together.

01 January 2018 9,300 4 View

Can anyone suggest some good journals to submit work on DSSCs with normalized impact factor between 1 and 3?

Thanks in advance for your help.

10 October 2017 10,011 3 View

How does Sigma Aldrich check for 99% purity of compounds?

For eg. I would like to what are the analytical techniques used in checking purity of natural dyes bought from Sigma Aldrich so as to conduct the same tests on the dyes extracted from other sources.

03 March 2017 8,783 2 View

Dye Sensitized Solar Cells: How is power conversion efficiency calculated from wavelength vs % EQE data?

I would like to compare it with the PCE obtained from I-V curves.In an EQE measurement, at every wavelength of light that is made incident, the DSSC give a certain current, voltage and efficiency...

09 September 2016 9,327 7 View

How is IPCE convoluted with A.M 1.5 solar spectrum?

In the context of DSSCs.

09 September 2016 4,770 0 View

Which solvent system is recommended to extract betanin from crude extract using column chromatography?

Which solvent system is recommended to extract betanin from crude extract using column chromatography? Any other suggestions on extraction methods that can be easily set-up from scratch are also...

01 January 1970 5,095 5 View

How do I measure scattering of an Ag nanoparticle dispersion experimentally?

01 January 1970 4,509 4 View

How to calculate extinction coefficient (K) from transmittance?

Is there a relationship that can be used?

01 January 1970 9,295 2 View

What is Constant Phase Element Index in a physical sense?

In the context of Dye Sensitized Solar Cells.

01 January 1970 9,982 2 View