How can extract the roots of an Ill-conditioned matrix with complex elements?

Hi everybody. I have a problem with solving the characteristic equation of an acoustic absorption coating. I have a 4*4 matrix that its determinant must be solved and the answer (the roots of the...

31 December 2019 7,048 3 View

How to use MOSFET for IV measurement?

Respected sir, We are making IV measurement setup. To the Gate of MOSFET, we give voltage in steps (VGS). and at the same time, we check the voltage at drain (VD) w.r.t. ground. It is varying but...

06 March 2019 6,394 1 View

Please suggest some nanoparticles whose chages drastically before and after oxidised state?

Please suggest some nanoparticles whose chages drastically before and after oxidised state? Also, suggest methods of sysnthesis.

02 December 2018 9,522 5 View

Hi all dears, Anybody can help me to define a specific curve in abaqus part modeling?

I need to define functional curve (I mean a curve which define with a function like as A*Exp(bz) or y=x^3+3x^2-4) for optimization goal. I must write a script and change the curve to optimize the...

11 September 2018 5,120 4 View

How the optical and electronic band gaps are different?

How the optical and electronic band gaps are different?

14 October 2017 8,922 3 View

What causes that a matrix has a large condition number?

26 September 2017 7,275 4 View

Solvation in c++?

Dear colleagues, I'm beginner in C++ programming, I've coded a c++ program to solvate (hydrate) a structure (carbon nanotube for instance). Would you please check it out and give me your comments...

03 February 2017 7,152 9 View

MPI error running LAMMPS?

20 November 2016 7,494 3 View

Q2. Could you please help in supplying me with a dataset for job scheduling for cloud computing environment?

10 November 2016 3,551 3 View

Does anyone know by any chance how we can delete the extra rows in Mean Comparison Output of SAS? and make a publication-ready ANOVA table?

Unfortunately, SAS output is not that user-friendly and publication-ready, it is a very powerful software, though.When I perform ANOVA using PROC ANOVA or PROC GLM and add MEANS, the output ANOVA...

03 September 2016 5,138 4 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

How to check the uv-vis absorption of nanoparticle by surface plasmon resonance?

I try to check the uv-vis absorption of Indium nanoparticle. Now I am measuring in solution, can I measure it in the form of a film?

01 March 2021 930 3 View

Why initial concentration of Pb not the same as calculated one when testing using AAS?

I am currently doing research on the adsorption of heavy metal using magnetic reduce graphene oxide. I use AAS to determine the concentration of the heavy metal. I prepare the Pb solution with...

26 February 2021 9,580 4 View

Is this the write procedure for acid digestion of soil for heavy metal analysis using AAS?

How to do acid digestion of soil sample with 3:1 aquaregia in an open vessel?

23 February 2021 3,053 7 View

Can a semi-conductor material have different absorption coefficient?

Does the absorption coefficient of the semiconductor changes with the change in the structure of the semiconductor? If you have a thin film and nanowire of the same semiconductor, will the...

23 February 2021 9,799 4 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

absorption= 1-mag(S(FP1:1,FP1:1)*S(FP1:1,FP1:1))-mag(S(FP2:1,FP1:1)*S(FP2:1,FP1:1)) is it correct for absorption ?

hi everyone I am simulating a unit cell structure in HFSS using Flouquet port having two modes for absorption I have used this formula:- absorption=...

17 February 2021 9,178 2 View

Can I measure absorbance efficiency with wavelength in a spectrophotometer?

I measure the wavelength of material in a spectrophotometer and it peaks at 275 and its absorbance is 100. I mix it with an adsorbent and it adsorbs the first material, but when I measure the...

16 February 2021 7,515 5 View

Unusually Busy Raman Background?

Hello, I am observing a nearly periodic background spectrum for a wide variety of SERS substrates. I see this response (attached below) for bare Au films, Cu films, and Au nanoparticles on...

15 February 2021 9,922 5 View

How to detect uv vis spectrum of nanoparticle under 300nm?

I try to make the indium nanoparticle and check the uv vis spectrum. I heard that In nanoparticle has surface plasmon resonance peak at 200~300nm. But most of solvent has absorption peak under...

14 February 2021 6,950 15 View