Journal of Research in Humanities and Social Science. Is a real magazine?

Dear colleagues: I have received many emails from a magazine called ournal of Research in Humanities and Social Science. I have gone to the website of this journal, and I read "some" indexes but,...

13 December 2020 6,208 6 View

Has anyone compared supervised classification methods using google earth engine?

Good Morning! Has anyone compared supervised classification methods using Google Earth Engine? Could you comment on what are the criteria you used to decide on any method?

29 November 2020 544 4 View

Looking for literature?

I am currently looking for relevant literature concerning international competition as I interested in the effects it may have on science diplomacy.

07 July 2020 9,713 1 View

Doed anyone have a protocol for comet assay in chlamydomonas?

Hi everyone! I am looking for an efficient comey assay protocol in chlamydomonas reinhardtii if you have some suggestions let me know thanks a lot!

15 January 2020 698 3 View

Carboxylate ion IR bands can appear in solid state?

I got a IR spectrum of Gum Arabic and two bands appear around 1600 and 1400 cm-1 respectively. I found these bands are related to carboxylate ion but I got the spectrum of the Gum Arabic powder....

16 August 2019 1,391 3 View

Can i test cytotoxicity of chitosan nanoparticles in ZFL cells?

Chitosan nanoparticles are pH sensitive, being soluble at pH < 5. The problem is that acidic pH promotes apoptosis in ZFL cells. How can i resolve this?

08 October 2018 487 3 View

How to create a DocumentTerm matrix?

I'm trying to feed a corpus into a DocumentTermMatrix (dtm) to analyze, but I noticed that dtm doesn't keep all terms (for example, I have terms with parenthesis and semicolons that I would like...

02 November 2017 6,082 1 View

Multitemporal landsat image?

29 October 2017 2,469 7 View

What actions can be taken to stopping predatory journals?

Stopping predatory journals and preventing researchers from submitting to them requires a collaborative effort.

21 September 2017 3,342 14 View

What are the fundamental characteristics of the teaching of physics in engineering careers?

There are pedagogical tendencies to teach applied physics in engineering careers

15 September 2017 9,356 8 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

How can we limit artifacts caused by rotation in fiber photometry?

We are trying to run fiber photometry experiments for long time scales, but we get these sinusoidal artifacts that come up. We think they may be caused by twisting of the fiber optic subject...

25 February 2021 568 1 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

What is the reason of the received optical signal to be slimmed down in multi-mode fiber?

What is the reason of the received optical signal to be slimmed down in multi-mode fiber? I have 4 km multi-mode fiber

03 February 2021 1,105 10 View

What Buffer should i use for T4 virus for electron microscopy ?

Hello, I currently have my T4 virus in HEPES buffer. Unfortunately, there are always crystals that are contaminating my solution (due to the buffer in which the Viruses are) when I observe them...

01 February 2021 400 3 View

Why it is not permissible to correct all 5 classical optical aberration (spherical, chromatic, coma, astigmatism, curvature of field) simultaneously?

When first order paraxial optics is expanded to third order optics (i.e. sin x~ x-x3/3! instead of sin x~x) , these 5 optical aberrations result in. What is the rigorous mathematical proof that,...

26 January 2021 8,666 4 View

Difference between Second-harmonic generation and Two-photon absorption?

Hello Dear Researchers, I am confused about the Difference between Second-harmonic generation and Two-photon absorption? Can anyone describe the two phenomena briefly in the physical picture? What...

24 January 2021 9,912 5 View

Is it possible that the single-pass absorption exceeds 50%?

Dear researchers It's well-known that the maximum light absorption of any structure can not be greater than 50%. Is it possible that the single-pass absorption exceeds 50%? How?

17 January 2021 2,335 7 View

What can cause laser beam polarisation fluctuations?

Dear colleagues, We have observed large fluctuations in laser power in our setup and traced them down to fluctuations in laser beam polarisation. Attached is a schematic of the relevant part of...

14 January 2021 7,505 4 View