Can someone clear out this contradiction regarding ab-dq transformation and their angular relation?

Hi, In the book "Power system dynamics: stability and control" by Jan Machowski, Janusz W. Bialek, and James R. Bumby, on page 117-118, in equations (3.166)-(3.167) and in figure 3.36, the...

06 July 2018 3,138 20 View

Modeling approaches when the QSS/DAE approach is not accurate enough?

Hi, I'm looking for modeling approaches when the QSS/DAE approaches are not accurate enough in power system dynamics. For example when both "slower" dynamics as machine transients x' are...

01 February 2018 4,127 6 View

Is anyone considering why people talk so little about solar power with mirrors and steam turbines nowadays?

Is anyone considering why people talk so little about solar power with mirrors and steam turbines nowadays? Such solutions should give more opportunity for load control, frequency response, etc....

31 December 2017 7,426 5 View

Is there an adjective related to "impedance" as "resistive" is related to "resistance"?

Is there an adjective related to "impedance" as "resistive" is related to "resistance"?

31 December 2016 4,780 0 View

Anyone that knows about methods of identifying multi-modality of samples of distributions? Or methods of estimating number of modes?

Anyone that knows about methods of identifying multi-modality of samples of distributions? Or methods of estimating number of modes and their respective borders?

11 December 2016 8,728 2 View

Alternative to Edgeworth series expansion?

I have read that a drawback with Edgeworth series expansion is that "... they can be inaccurate, especially in the tails, due to mainly two reasons: (1) They are obtained under a Taylor series...

09 October 2016 6,338 3 View

Where is it possible to buy single-phase AC synchronous motors for lab purposes?

Where is it possible to buy single-phase AC synchronous motors for lab purposes?

02 March 2016 5,245 7 View

Can someone help with Polynomial matrix equations?

Hi, I'm getting old and I'm not sure whether or not I've learnt any theories about solving polynomial matrix exiations, like the second order equation XTAX+BX+C=0. Can anyone fresh my mind up or...

07 August 2015 216 3 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Dear all, I was wondering if anyone knows whether MGLtools and Autodock can run on Mac OS?

I have tried to download the 64-bit version of MGLtools however, as many times as I have downloaded and uninstall the programs, an error arises that the app needs to be updated. Thank you.

03 March 2021 5,997 2 View

I got 02 moderator values defining Johnson-Neyman significance regions. Is it an error?

Hi everyone, I am conducting research for my Master's thesis. I am using PROCESS by Johnson-Neyman to analyze my Moderator model. I test the relationship between Public Service Motivation and...

03 March 2021 2,350 2 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Do I need to strip the PVDF membrane before staining it with colloidal gold?

Dear Colleagues, After running Western blot on PVDF membrane and detection using ECL, I would like to stain my PVDF with colloidal gold to be able to allign the ECL image with total proteins on...

02 March 2021 7,829 3 View

PACYC PCR not working after several attempts. Would anyone have any suggestions?

So, I have been trying to run a pACYC PCR which will be used later on for a Gibson Assembly. However the PCR is not working. I have already tried gradient PCR and changing extension time; however...

02 March 2021 1,146 2 View

How to grow E.coli on the low salt LB agar plate with 50 or 100ug/ml of Blasticidin?

Hello, I would like to ask how to grow E.coli which resists 50 or 100ug/ml of Blasticidin. I have tried many methods by using low salt Luria-Bertain(LB) agar plate. However, no colonies grow. Let...

01 March 2021 2,027 2 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View

OpenBCI eeg--has anyone used them?

I'm looking to try out an off-the-shelf EEG set for some exploratory work. Curious if anyone has used the OpenBCI, and how much set-up work is required. I've heard they are more difficult to get...

01 March 2021 4,128 3 View

Is there any expert in Smart PLS who can help me?

Dear colleagues, I have a manuscript that needs an expert in smart PLS to run the analysis, Is there anyone expert and ready to help me, please?

01 March 2021 8,212 3 View