How can I make unsupervised clustering of trees species using algorithms like HAC, Kmeans... in R?

I am working on the development of multi-species volume allometric equation from diameter (DBH). I would like to form groups of species with the largest possible volume-diameter correlations by...

19 January 2021 5,752 5 View

How can I build a crystal model(Beta-silicon nitride) in VESTA?

I will make an atomistic simulation of the beta-silicon nitride phase with the GULP code in order to obtain its structural, mechanic and thermodynamic properties; I would like to use fractional...

16 July 2019 4,819 3 View

Where can i find good resolution imagery (remote sensing, DEM) for Gange river basin ?

I must first collect some data of the Gange basin (6 states), India. I find SRTM data for DEM, and look for hydrologic vector data, and good remote sensing imagery. Thank you for your next...

24 March 2019 3,557 4 View

Nature of a white cloudy floating layer observed during HeLa lysate centrifugation ?

Preparing Lysate of HeLa cells (1E+6 in 0.5mL lysis buffer 1.5mL eppendorf tube) by standard chemical lysis (RIPA like buffer) during the 12000 RCF centrifugation step (clarification) I noticed a...

28 October 2018 2,035 2 View

Pairwise.t.test after lmer: is that right?

I used the following model: model1= lmer(A~B*C+(1|block)) where A is a quantitative (continuous) variable and B and C are qualitative ones, with respectively 3 and 4 levels (A and B are crossed, 1...

06 October 2016 382 4 View

Hello, i am doing clonogenic assay but my cells appear dot like(form is not covenient) can someone help troubleshoot?

i seeded 1000 cells and it has been 2 days, what to do?

04 September 2016 1,857 5 View

Do you have pictures of the experimental setup for electrophysiological recordings of the moth's auditory circuit?

17 November 2014 9,841 3 View

Why are plant meristems always virus free ?

When plant breeders want to re-generate plants that are virus-free using asexual multiplication (in order to obtain clones of the primary unhealthy plant), they often collect the apical meristem...

23 October 2014 7,040 16 View

In optomechanics, when the ratio k/w_m is < 1, should the ratio (in absolute value) between the linear and quadratic couplings also be < 1 ?

02 September 2014 5,123 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

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

Do you know any MR image dataset?

I would like to research on MR images (0.5T and 3T). Can you please suggest some websites that I can download dataset including both 0.5T and 3T MR images? Thank you.

02 March 2021 7,735 3 View

Which is suitable for use with Python? MySQL or SQL Server?

Which is suitable for use with Python? MySQL or SQL Server? What is your suggestion?

01 March 2021 3,422 3 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View