Selecting particular columns from large datasets (csv) using R Studio?

So I have large number of csv files (100+) in a directory with same structure and column names. The data is in time series and there are approx 30 columns/file. However i only want to aggregate...

08 February 2021 245 5 View

How can solve the second order linear homogeneous partial differential equation with variable coefficients?

can someone help me with reduced the partial differential equation du/dt = - f(x) d^2 u/ dx^2 - g(x) du/dx --- (1) to become: du/dt = - p(x) d^2 u/ dx^2...

21 January 2021 3,296 1 View

IHC-paraffin experiment: how do you approach shopping for an antibody?

Hello everyone! I am shopping for an arginase 1 antibody to use for IHC-paraffin experiments with rat tissue. So far what I have understood is that if an antibody says it is reactive with rat,...

16 January 2021 794 3 View

How to explain insignificant independent variable which is significant with interacting (Moderation) variable?

10 December 2020 3,037 1 View

What could be the impediments to the initiatives adopted by the bank towards FI in the Indian scenario?

this question from case Union Bank of India: Initiatives towards IT-enabled Financial Inclusion

09 December 2020 7,721 3 View

Can we use the general hotplate as a source of heating in the Soxhelt method or not ? what is optimal temperature when using n-hexane as a solvent?

there is a problem with the heating part in soxhelt apparatus, so my question can we use the standard hot plate as a source of heating?

05 December 2020 9,322 2 View

Carbon Emission calculation factors ?

I am thinking about writing a paper on carbon emissions based on electricity consumption data from some buildings. From a research perspective, which factors should i specially focus while...

09 October 2020 4,142 3 View

How to calculate the quantity of enzyme needed to hydrolyze protein?

I have alcalase enzyme it's activity 10000U/g and I want to use it in hydrolysis whey protein isolate 90% protein. A suspension of 5% (w/v)WPI prepared so I am asking about the quantity of enzyme...

05 October 2020 9,825 3 View

Will the publishing of conference papers be counted?

During promotion, papers published as conference proceedings are not considered; on the other hand, it is counted as publications in a few places but with less credits. kindly request your...

23 September 2020 3,254 38 View

Which configuration should be more preferred AC or DC coupled for PV-battery storage systems?

The ideal assumption is : uniform sized PV and battery storage system, and similar load for both configurations.

07 September 2020 7,193 30 View

What is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 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

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

How to address this issue in the analysis of Real-Time PCR results?

To dear Researchers, I was analyzing a series of concentration for estimation of Real-Time PCR efficiency. The concentration was 1:10. I used MS-excel to evaluate Slope. The result of slope was -8...

01 March 2021 8,683 4 View

Could anyone tell me what is the range of submillimeter wave?

There is confusion regarding the submillimeter-wave range. Many papers specify its range from 300GHz but some also consider its range from 100GHz. If I design an antenna on 122ghz what would I...

01 March 2021 516 7 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

How to modify Johnson cook equation in ABAQUS?

I wanted to add an extra parameter to the existing Johnson cook equation in the ABAQUS simulation. How to add those extra parameters. Ref: A modified Johnson-Cook material model with strain...

28 February 2021 4,841 3 View

How can we simulate an hyperelastic-viscoelastic behavor with Ansys APDL?

I am working on modeling and simulation of biomecanical material behaviour, I have succeded on simulating skin using anisotropic hyperelastic material, on APDL and in our lab's finite element...

28 February 2021 552 3 View

Complex wave form in ANSYS?

Is there a way to input wave speed in a complex form on ANSYS? The wave speed I need to assign a material is 325(1+0.11i) however I have been unable to do this thus far. Failing that, is there...

27 February 2021 5,969 1 View

How to find the right number of integration points in second order 3d finite elements?

I am familiar with finite element simulations and numerical schemes like the Gauss Legendre quadrature. I also know that the Gauss integration yields exact values for polynomials up to degree 2n-1...

27 February 2021 6,818 3 View