How does a freeze dryer destruct your solid sample?

Several times I lost my sample during freeze drying. There was no solid or powder in the vial after freeze drying. I'm sure sample contained solute because i took its NMR spectrum. I covered the...

15 February 2021 6,749 2 View

What is your suggested method and materials for producing UV-curable transparent coatings?

What are the easy methods for synthesizing UV curable resins? I need to synthesis UV curable coatings. MMA seems to have good features for transparent coatings, but the additives and synthesizing...

24 April 2020 3,256 7 View

What is the command for running comsol in the linux os?

I'm using comsol multiphysics on a cluster that operate linux os. i used this command to run and solve my mph file that named s4: comsol batch inputfile s4.mph outputfile s4solve.mph but the...

25 February 2020 5,691 1 View

Comsol semiconductor error?

Undefined value found in the equation residual vector. There are 1 degrees of freedom giving NaN/Inf in the vector for the variable comp1.Ph. at coordinates: (9.6875e-09), ...

19 January 2020 2,459 2 View

How can one learn about the effects of an organic substance on the human body?

For example, we synthesized organic matter called A, at this point we want to know its effects on the human body. I wanted to know if there was a special device for this or were they using other...

16 December 2019 2,223 3 View

Is there any way to conver several dicom to one 3D dicom?

Hi I want use 90 slice of ct dicom(head) in gate as a phantom for dosimetry. is there any way to convert these 90 dicom into 1 dicom file(2D files to 3D file) or mhd/raw file?cuz I want gate...

03 November 2019 7,560 3 View

In immunofluorescence assay, do we need to wash away (with 1X PBS) blocking buffer (10% FBS-PBS) before adding the first antibody?

In immunofluorescence assay, do we need to wash away (with 1X PBS) blocking buffer (10% FBS-PBS) before adding the first antibody?

25 September 2019 6,591 3 View

How can I attach an amine group (-NH2) to a carboxyl group (-COOH)?

20 September 2019 5,256 5 View

I need a method for plating nano-silicon on a metal substrate?

Coating of metals with silicon

13 August 2019 1,318 3 View

Is it possible to simulate hysteresis effect for piezoelectric material in COMSOL or ansys?

I tried sinusoidal input voltage with the amplitude of 100 V but couldn't get any hysteresis curve

24 May 2019 5,973 4 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 should we choose deep learning to machine learning? Why is CNN better for image classification? Can I get Typical Answer?

What Characteristics makes CNN work better?

03 March 2021 1,458 4 View

What are some of the research gaps in machine learning and artificial intelligence in africa?

i would to know some of the research gaps in the artificial intelligence field in most african countries.

03 March 2021 6,145 3 View

Anyone plz suggest relevant topic for research in image processing+Deep learning.?

I have selected brain tumor images ...but now found that already lots of research done n this topic.

03 March 2021 5,774 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 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

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View