What is the most efficient way for computing Archetypal Analysis?

Archetypal Analysis (AA) is a method for analyzing data by looking at its convex hull and not by looking "inside" it, as is the practice in most of other procedures. For example in Cluster...

05 June 2019 5,819 3 View

Have we silently entered on a modern gray Inquisition in Science?

05 June 2016 2,632 19 View

Lets talk about Cosmology. Are the basic foundations valid?

03 April 2016 7,819 22 View

What is the largest permitted number of observations for using self starting methods of nls in R?

05 June 2015 3,223 1 View

Which is the best wound dressing for a pressure ulcer of type III or IV?

01 February 2015 8,956 22 View

What is going on with arXiv.org? Is it a shadow journal with jungle rule to govern it?

Has arxiv.org fallen into an arrogant state, due to its over-success? From certain examples it seems that: (i)It is a non-declared Journal without known editor in chief, without known referees...

10 November 2014 4,661 30 View

How do you use Fortran .dll and .so executables from an R package?

I have an R package and I want to update it by giving the option to run a pre-compiled .dll made from a Fortran source, since by this way it is very fast. The problem is that I'd like to have...

09 October 2014 7,311 10 View

What if gravitational waves will never be found?

09 October 2014 1,228 23 View

Is the concept of field the proper way to describe physical processes?

What is a field? Everywhere around a 'source' of the field, if we put a 'test particle', then a 'force' will be applied to it, coming from the source.This definition has a critical drawback: if...

09 October 2014 7,840 100 View

Should we move towards a totally new cosmological paradigm?

Many paradoxes have been created the last 100 years after the complete dominance of relativity theories in cosmology. We could talk about the End of Physics, in a similar manner as F. Fukuyama...

07 August 2014 8,170 6 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 are possible instrumental variables for business dynamics (firm entry/exit)?

Dear All, For my paper, I use business dynamics (firm entry/exit rates) as an independent variable in the econometric part. Due to endogeneity I follow a 2SLS approach, for which I need a...

28 February 2021 5,322 3 View

Does RNAiMAX transfection reagent work in serum free medium?

I diluted siRNA and RNAiMAX in opti-MEM and added to the cells which they were in the growth medium. Is it a right way? or should I culture cells in the opti-MEM medium for a while and not in...

26 February 2021 10,041 3 View

How do I transfect a large plasmid into PC12 cells with nerve growth factor (NGF) receptor?

I have a large 16 kb plasmid, which I need to transfect into PC12 cells. Lipofectamin 2000 didn't work and with GFP alone the transfection rate is very low. I also tried the neon invitrogen...

25 February 2021 6,635 5 View

How to model Supercritical water gasification (SCWG) process in Homer software?

Hi everyone How to model Supercritical water gasification (SCWG) process in Homer software?

25 February 2021 4,075 1 View

Can we recognize signs of the "volatility clustering" property of a time series in its time domain plot?

My purpose is to recognize the volatility clustering property without statistical tests such as The Lagrange Multiplier (LM) test.

24 February 2021 4,150 3 View

How to estimate 2SLS with different instruments for different endogenous variables?

To be specific, I want to conduct an IV regression in stata with the following three equations. EQ1: Y1 ~Y2 Y3 X EQ2: Y2 ~ Z1 EQ3: Y3 ~ Z2 Both Y2 and Y3 are endogenous. However, Z1 and Z2 are...

23 February 2021 6,266 3 View

Can anyone suggest a topic for the Impact of AI and ML in the financial institutions?

I am currently doing my Master Thesis in FinTech and I am thinking of doing my project on the impact of AI and ML on the financial industry but as the impact of these technologies on the industry...

21 February 2021 7,128 3 View

How to disaggregate country data into city ones?

I'm using a number of indicators in my research which are not available at a sub-national level. Is there a reliable method for disaggregating the country data into city ones? (preferably with a...

16 February 2021 6,861 3 View

Is there any effective FEM solver to perform simulation of balloon inflation with large deformation (e.g. 300% strain)?

Hi! Thank you for your time, attention, and support. I am currently using FEM solver Abaqus to perform a set of balloon inflation simulations, trying to understand the deformation shape, stress,...

14 February 2021 2,524 4 View