how can i have the optical Mode size in COMSOL?

hello, Im using the Electromagnetic Waves Beam Envelops interface in order to simulate two seperate structures: one is a waveguide inside silicon, second is just propagation inside a bulk of...

10 October 2020 6,184 2 View

What would happen if the work function (WF) of the cathode is lower than the acceptor LUMO?

Dear colleagues, Now I am working on BHJ solar cells with inverted structure. I have a case where the cathode's WF (~3.8 eV) is lower than acceptor LUMO (~3.9 eV). What would happen if the...

18 August 2020 9,367 3 View

How to implement lower partial moment of order 1 for given stocks in excel sheet?

I am working on portfolio optimization using lower partial moment of order 1, can someone help me how to implement LPM-1 in excel sheet using "tau" as my threshold value as 0.00% and order (n) as...

05 July 2020 2,510 1 View

Do female sandbar sharks school?

I am looking for literature regarding sexual segregation in sandbar sharks (carcharhinus plumbeus). I was told once that males school but females are solitary, and I cannot find a reference...

07 May 2020 2,537 2 View

How can I adjust the tilt angle and the distance between the absorbed small molecules and the substrate?

I am here using the avogadro program for the construction of molecular structures, before doing DFT calculations. I use H2O and Graphene as small molecules and their substrates.

07 May 2020 4,661 3 View

Which evaluation is more effective and robust for imbalanced class classification?

In imbalanced class classification task, accuracy is not good enough as a main evaluation. There are several alternative evaluation, i.e.: AUC, kappa coefficient and Matthew's correlation...

22 April 2019 794 9 View

Why the active layer film becomes bad when I spin-coat a solution on it?

Dear colleague, I try to make opv device using PTB7:PC70BM active layer. The solvent/additive of this active solution are Chlorobenzene and DIO. When I try to spin-coat a phosphomolybdic acid...

28 March 2019 7,675 7 View

How can I convert from ppm to weight or volume for stearic acid in solution?

Dear, How can I convert from ppm to %wt or %vol for stearic acid in solution? For example 200 ppm of stearic acid in 10 mL of ethanol contains 20 mg PEIE. Thanks Sincerely, Adi Prasetio

23 January 2019 8,510 3 View

Hi! Does anyone know of an easy method to stain nerve tissue in isects?

I'm looking for a staining method or an antibody that'll work with antibody staining protocols for microscopy. I have a protein that I suspect enters the insect nerve tissue. I have specific...

10 January 2019 1,450 2 View

Roughness surface versus kinetic energy?

how can i simulate roughness surface of deposition thin film versus kinetic energy

17 October 2018 2,532 3 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

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

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 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

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View