How can I generate random samples from Bingham distribution in R? How can I construct those symmetric matrices?

in the function rbingham(n,A) in R software how can I construct that A (symmetric) matrix?

24 February 2021 3,528 3 View

How can i increase biomass of my E. coli culture to better plasmid yield?

Hi everyone, I want to increase the biomass of my E. coli culture for better plasmid yield. Use of different strains of cells and media or any other suggestions are welcome. Thanks!

11 October 2020 6,400 3 View

Do you have the following alloys?

Dear colleagues, It will be a great help if someone can provide me small pieces (1.5 cm * 1.5 cm * 1.5 cm) of cast Al 5024 alloy and Al 7068 alloy (with and/or without T6 heat treatment. Happy to...

31 July 2020 3,593 1 View

What to do when there is no main or interaction effect but multivariate tests and pairwise comparision tables show significance?

I run repeated measures ANOVA for an intervention study. I have 3 intervention groups and 3-time points. The output in SPSS showed that there is no significant main effect of time and no...

02 April 2020 2,328 7 View

Nonparametric equivalent of ANCOVA?

For testing the effectiveness of group intervention, I would like to conduct ANCOVA. I have one experimental and two comparison interventions. However, my data is not normally distributed. Also, I...

20 November 2019 432 9 View

Would you recommend using SYBR green based real time PCR kit for disease diagnostics?

It is seen that most diagnostics kits are Taqman based, now as PCR is quite sensitive, can we settle ourselves with SYBR based kits in a resource-crunch set up?

17 August 2019 3,051 3 View

Is the amount of RNA extracted from normal human serum too little, to give amplification of a marker gene by RT PCR?

I have isolated RNA from 50ul serum and eluted the RNA in 30ul of DEPC- treated water. But when i am preparing 10ul of cDNA from 1ul of the RNA and using it for amplification of a 115bp...

22 January 2019 6,813 3 View

How to draw collinearity of a gene?

I want to study collinearity of a set of genes. However, while going through a few related papers, I found out that the most used software is MCscanX. I did download it, but since I am not a...

07 November 2018 2,285 3 View

How do you decide which housekeeping/reference gene is the most suitable for your samples?

I used UBC, GAPDH and Beta actin as housekeeping genes in my proximal colon samples. Bu my each Cq calculation shows difference according to housekeeping gene that I analyzed. For instance the Cq...

29 June 2018 4,479 2 View

What is theory behind the PIV ( Particle Image Velocimetry) analysis in Geotechnical field??

PIV means Particle Image Velocitimetry.

15 May 2018 6,196 2 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

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

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

How to calculate average trend in maximum annual NDVI from MODIS?

I am wanting to calculate the average trend in maximum annual NDVI in Iceland from 2010-2020 using MODIS MYD13Q1 V6. How would I do this? I have currently inserted the NDVI bands from the MODIS...

02 March 2021 752 2 View

Why does two different bioinformatics tools for the same proteins show different subcellular localizations?

During a computational analysis, I found that for a protein of a plant, two different subcellular localizations are seen using CELLO and WoLF PSORT. For example, in CELLO, it identified the...

01 March 2021 6,729 2 View

What is the most suitable server for predicting protein structures in bacteria?

I have used the i-Tasser several times, however it has been unavailable for several days. I tried the swiss-model, but the output was not very pleasant due to the model used. Is there any other...

28 February 2021 4,521 3 View