How to derive equations for a resonant buck converter with ZVS?

I am not understanding how each author is deriving the equations and the working principle. Individual authors are giving their own working principle explanation for different circuit topology....

12 February 2021 496 1 View

How to assing secondary structure to calculated peptide/protein having xyz file?

Hi, I have an optimized structure of some peptides and I would like to represent it as a secondary structure - cartoon. Ok, so server apps ask for pdb file (like Stride). I tried in different...

04 February 2021 517 3 View

Is there a free software that could calculate electron density on a given atom?

Dear collegues, as stated - I'm looging for a soft that would calculate electron density on a given atom of a small molecules. Either for Ubuntu 18.04 or latest MacOS. I tried multiwfn, but it...

26 January 2021 4,060 3 View

Crystallinity index measurement of Cellulose nanocrystals ??

How to find the crystallinity index of cellulose nanocrystals using XRD peaks. Can anyone suggest the most appropriate method of finding CI

28 December 2020 7,809 4 View

Did anyone use spaCy multi-langage model (xx_ent_wiki_sm) to analyze Eastern Eurpean languages (e.g. Estonian, Slovakian, Croatian)?

I'm looking for morphological models that could used for stemming (NLP) in python for following languages: Croatian, Czech, Estonian, Slovakian.

08 December 2020 1,277 2 View

Does anyone knows any technique to find the location of an object in an image?

We are doing a project in which we are detecting (using YOLOv4) runway debris using a fixed camera mounted at a pole on the side of the runway. We want to find out the position of the object with...

03 December 2020 774 6 View

Hi; I need some MRI or CT scan pictures of the human brain. Can anyone suggest me any good website for finding these files?

need a human brain MRI/CT scan image dataset for research purposes.

08 November 2020 2,145 2 View

I am having problem with my Hplc chromatogram. The base line has shifted downward and its nt coming to zero. I am looking for problem and solution ?

A few days ago i eluted a sample with standard (Tartaric Acid ) for which mobile phase 0.05 M Phosphoric acid, MeoH and water ( 69:1:30) were used. After analysis the base line (Uv/Visible 254 and...

03 November 2020 9,893 3 View

Does Google's terms and conditions allow collecting and analysing user reviews for research?

I am planning to conduct research that involves analysing app reviews from Google's play store. From the hundreds of papers published on then analysis of app reviews, I am assuming collecting and...

29 September 2020 5,543 3 View

Is thematic analysis an individual analysis technique for qualitative research or comes under any of the 5 approaches to Qual Research??

is thematic analysis an individual analysis technique or it falls under grounded theory (As some literature says) or it is merely a technique that can be used under any of the 5 common approaches...

30 August 2020 1,916 11 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View