Joseph Dubrovkin

17 Questions 103 Answers 0 Followers

Questions related from Joseph Dubrovkin

How to evaluate the reliability of PLS regression?

There are many works and programs in which the closeness of measured and calculated response variables assesses regression quality. Is this enough?

16 September 2024 628 1 View

Does the alkyl chain between the carbonyl group and the C=C bond convert this group to saturated?

Find attached file

01 May 2024 6,964 0 View

Does the alkyl chain decrease the impact of the ring on C=O stretching IR?

Find the attached file.

16 April 2024 6,824 1 View

What is the origin of two “humps” (bands) in the C=O stretching region of ketones?

Find the attached file! Maybe intramolecular hydrogen bonding in some cases ( 10, 39 )? [Conformational stability, molecular structure, intramolecular hydrogen bonding, and vibrational spectra of...

13 February 2024 9,990 2 View

What do you think about the "Twitter-diplomacy" of President Trump?

I think that this is a very smart tactics oriented to the wide audience in a new Information Age. It is more attractive than the tedious statements of classical politicians that are read from the...

12 April 2018 208 6 View

Are historical facts objective?

Maybe all historical facts exist for us as already refracted through the consciousness and social interests of our social class, our nation and epoch? Also...

04 July 2017 232 18 View

How one can merge qualitative chemical information with quantitative data?

Experienced chemist may obtained valuable qualitative information about the products obtained by the processing line according to human subjective sensations (color, odor ,....).But also we have...

13 June 2017 6,666 3 View

Do you know open large datasets of NIR spectra ?

I am looking for a large dataset of NIR spectra (more than 500-1000 samples) including sample parameters and the results of the calibrations (errors in determining these parameters). Maybe some...

28 April 2017 7,571 7 View

Why do mass media intimidate the inhabitants of the earth with asteroids?

Maybe there are political or economic goals - distract people from real problems that governments cannot solve?

22 April 2017 4,580 3 View

Derivative spectrometry is one of the Sequential Methods: Does this classification reflect the essence of the method ?

According to R.G. Brereton Derivative spectrometry (DS) is one of the Sequential Methods of data processing. However, the essence of this method is use of the derivatives instead of spectra. DS is...

16 April 2017 790 0 View

Do you know a simple method to generate the coefficients of the minimax Chebyshev filters in the time domain?

EXAMPLE From: E. López-Camacho, A. García-Cortés, C. Palacio, A family of smoothing algorithms for electron and other spectroscopies based on Chebyshev filter. Thin Solid Films 513 (2006)...

07 April 2017 1,402 2 View

Do you know an theoretical interpretation of the emission (fluorescence) spectrum of benzene ?

E.g, the spectrum is given in the open database : http://www.photochemcad.com/ One can see 4 wide overlapped peaks.

19 October 2016 6,043 30 View

Can you recommend popular programs for deconvolution which are used by analysts?

Dear all ! I am looking for software for deconvolution of overlapping symmetrical and asymmetrical peaks in spectroscopy and chromatography. There are many such applications in Internet. But I am...

01 May 2015 9,926 9 View

Is there a benefit from two MATLAB applications operating in parallel on the same computer?

I can process a big matrix on a single MATLAB application or I can divide this matrix into some parts and run many MATLAB programs simultaneously.

25 December 2014 5,185 2 View

What is your opinion about "the drain of start-up companies" ?

Successful small start-up companies are bought for a pittance by big foreign companies. This is an usual for many countries, e.g., for Israel.

29 April 2014 858 14 View

What is the impact of wearable computers on human behavior and the mind?

In my opinion the impact on some people's behavior could be unexpected.

05 December 2013 9,468 1 View

Does the modern policy prevent scientists to share information?

E.g., boycott Israel

05 November 2013 524 2 View