Level 1 pre-post multilevel regression: Panel data or ANOVA approach?

Dear colleagues, I am currently teaching myself in multilevel analysis using educational data. I found few to zero literature on basic analysis methods. In my context we frequently use level-1...

17 February 2021 9,378 5 View

Reliable and Valid Instrument for Causes of Medical Errors?

Is there any questionnaire/survey that measures the causes of medical errors? Example: physician negligence vs. systemic issues. Looking for a reliable and validated instrument. Thank you!

15 February 2021 2,874 4 View

Should the AUC in a concentration-time graph of a subcutaneous implant be roughly the same for poeple?

I have 2 concentration time curves of a subcut drug implant. the first group has a peak around the 50 day mark where as the second group does not. Both groups received the same implant by the same...

10 February 2021 2,305 3 View

Software for flow cytometry-like gating of data sets?

I am currently trying to do image based cytometry from fluorescence microscopy images. From the images I extract data such as cell size and a number of fluorescence intensities. Is there any...

09 February 2021 6,278 1 View

Can A. thaliana splice algae genes?

24 January 2021 329 2 View

Does long term preservation (10years) of Collembola in 99% Ethanol affect recovery rate of extraction by flotation?

Hello! I am currently developing an automated counting approach using Fiji to count Collembola from pitfall trapped samples that have been stored in Ethanol (99%) since 2010. I use flotation (tap...

13 January 2021 659 2 View

Co-stain Lectin PNA FITC conjugate with an uncojugated primary antibody?

Hello, I am planning to stain retinal tissue sections for IHC and want to co-stain cones and rods. For this we plan on using a Lectin PNA From Arachis hypogaea (peanut), FITC Conjugate for cones...

12 January 2021 583 1 View

How to use Abaqus USDFLD subroutine to vary stiffness?

Hi I have a problem where I am trying to vary the stiffness spatially across a structured interface. The whole idea is to vary the stiffness vertically, with a bulk stiffness of 8GPa decreasing...

06 January 2021 262 3 View

I really need help with cov-2 pseudotyped lentivirus production. Support?

Hi, i'm desesperate. i'm trying to produce lentivirus usinf BEI resources kit NR-52948. 24 hours after transfection i detect a massive GFP expression in my 293T cells. After 72 hours i filtered...

30 December 2020 9,889 6 View

How can i estimate the total phenolic content from a plant extract?

Suggestions and recommendations are welcome. A protocol used and experience would also be helpful.

25 December 2020 9,807 4 View

How to correctly choose the number of solution intervals when preforming harmonic analysis in ANSYS?

Good day, I design the rail-wheel geometry and the harmonic frequency ranges between 20-10kHz with 500Hz solution intervals and the results makes sense. Most of the time on the related literatures...

19 February 2021 3,190 3 View

Mie scattering of a Gaussian with curved wavefront by a sphere?

Can anyone please suggest some references? I would like to simulate scattering of a fundamental mode of a fiber by a microsphere. I am only familiar with a plane wave case, but in case of a curved...

01 January 2021 1,440 3 View

MPC for grid connected inverter with LCL filter generates dominant 3rd & 5th order harmonics. solutions to eliminate them?

Hi, I'm trying to design a three phase grid feeding inverter. Haven't used a transformer and grid neutral is grounded. LCL filter is being used. Id* and Iq* are references for grid current. These...

23 November 2020 6,562 3 View

How to make a dispersion curve using ANSYS?

I try to make a dispersion curve using ANSYS and have some problems. I am beginning to simulate acoustic wave propagation in a simple mass-spring chain of metamaterial and have no idea for...

11 November 2020 7,803 1 View

How does one extract FRF- and phase-data from ANSYS (APDL)?

Hello. Using the instruction in: https://sites.ualberta.ca/~wmoussa/AnsysTutorial/IT/Harmonic/Harmonic.html I am able to create frequency response and corresponding phase plots. I...

10 November 2020 2,471 1 View

What is the Source of Harmonic Power ?

Consider a sinusoidal supply at fundamental frequency as shown, with a series inductive reactance leading to a bus. Let a diode rectifier load be connected to the bus. The switch Sw for resistive...

24 June 2020 8,175 27 View

What is the difference between harmonic acoustics and aero-acoustics analysis in ansys fluent?

trying to figure out difference between harmonic and aero-acoustics while studying different noise models in fluent..

01 April 2020 8,942 3 View

What is the impact of Pulsed loads and harmonics current on the battery lifetime?

I'm looking for the impact of different loading conditions such as pulsed load, harmonics load and etc. on the battery lifetime, performance and efficiency and how can I modeled this impact on the...

17 March 2020 8,850 10 View

How to set spring constant for umbrella sampling in GROMACS?

Hello everyone, I'm new to gromacs and also new to umbrella sampling, so I'm following Justin's tutorial http://www.mdtutorials.com/gmx/umbrella/index.html ; On the umbrella sampling stage, I'm...

20 February 2020 1,781 3 View

Any available paper on dynamics of heavy loads in an off-grid microgrid?

Good morning, I refer to isolated microgrids e.g rural power systems. In these off-grid systems chances are that the starting of loads involving great in-rush currents can create power unbalances....

01 February 2020 641 4 View