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

Is their already an online community around electrocoagulation-flotation?

We are a start-up company working around industrial waste water treatment via electrocoagulation-flotation. It is our believe that the implementation of this technology is necessary to reach the...

03 March 2020 824 3 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

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

Can I adapt primers used for 250 bp amplicon sequencing into primers for 500 bp amplicon Illumina sequencing on MiSeq?

Untill now I have always used the Illumina technique for sequencing the V4 region of the 16S rRNA on the Miseq System. Primers targeting the 16S V4 region were designed and tailed with sequences...

18 November 2014 4,219 4 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

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

What analysis to choose with a large neste dataset and clearly skewed or kurtotic distributions?

Hello! I have a dataset of n=3000 nested within 8 countries with approximately 200 or 400 responses in each country. I originally planned to perform multilevel modelling with 4 dependent variables...

02 March 2021 6,865 1 View

Which SAR dataset to use for generating coherency matrix and performing target decomposition (Description) ?

Working on chandrayaan-2 DFSAR data, there are three datasets available: 1) Slant range image data product: The slant range complex image file. Each pixel is represented by two 4-byte floating...

02 March 2021 8,481 3 View

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

In frequency domain alpha band(8-16hz), beta band(16-32hz), gamma band(32-64hz), sub-band(64-128hz) are same as LL,LH,HL,HH in wavelet decomposition?

I am working on single trial motor imagery data i.e. EEG data. I am following a paper which has a dataset from BCI challenge IV (dataset 2b). After removing noise and extracting all the data from...

23 February 2021 5,503 1 View

Are there methods for automatically mapping floodplains, fans and terraces?

I want to map these river geoforms with as little subjectivity as possible. I have a high resolution DEM generated by drone data.

22 February 2021 7,800 3 View

Covid 19 Pandemic ' impact on digital transformation?

Covid 19 Pandemic and digital transformation

22 February 2021 3,351 5 View

How can we improve AI in detecting fraudulent activities on digital payments?

I am conducting a study on the effectiveness of AI towards detecting and averting digital payment fraud. What are the popular AI techniques being adopted in mitigating digital fraud and how could...

21 February 2021 3,888 4 View

Are we using now IT technology effectively?

I discover now two my papers, which are more then 30 years old and which are describing something, what was done in years 1985 -...

21 February 2021 5,008 3 View

Is the box plot of climatic indices better illustrate from daily data or annual data?

Hello, I hope you have a good time. I work on a research project about temperature indices. Due to the high number of indices, I only work on tables and maps on an annual time scale. In other...

19 February 2021 9,742 2 View