Sampling size for unknown population?

Lets say I am sampling from an non-normal, multivariate population of unknown size and distribution. I'd like to know when I can stop sampling from the population (to a certain error) and have a...

08 September 2018 1,221 6 View

TAE buffer vs TE buffer for DNA stock storage?

Hi, Can DNA stocks be resuspended and stored in 1x TAE buffer vs. 1x TE buffer without negative effects? It would be simpler for my process to store the DNAs in TAE, however most sources recommend...

01 February 2015 9,166 0 View

Matlab, Keithley 2410, Current vs time?

Hi, I'd like to apply a fixed constant voltage using a Keithley 2410 and read out the current with respect to time using Matlab and SCPI commands via a USB/RS232 connector. I am using MaxOS,...

11 December 2014 6,988 2 View

Does anyone share a simple script using Keithley 2400 with Matlab?

Hi I'm trying to do a simple script that measures current vs time for a fixed voltage using a Keithley 2400. Does anyone have a simple script they could share on how to do this? So far I am able...

08 September 2014 2,752 1 View

What is the best Theory / Basis Set for graphene simulations in Gaussian 09?

I'm trying to do g09 simulations to obtain raman spectra of nanographene flakes (~ 24 carbon atoms) doped with nitrogen. Can you suggest a theory / basis set to use? Are diffuse orbitals...

05 June 2014 7,775 8 View

What is a good test (e.g. colormetric) for aminooxy groups (R-ONH2)?

I have seen Canaline and Jaffe's test, but I am not sure this is what I am looking for.

05 June 2014 518 2 View

Can gaussian09 be used to simulate valence band spectra?

And if so how?

02 March 2014 2,416 3 View

Can you recommend a cell line alternative to retinal ganglion cells?

I would like to test for adhesion and viability of retinal neuronal cells on materials.

10 November 2013 2,394 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

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

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 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

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View