Structure of the residual covariance matrix in a model with multilevel within-subject factors?

Hello, I have a dataset with a three-level structure. Participants reported an outcome of interest for 3-4 aspects of an incident, and they reported 4 types of incidents (1 incident for each...

09 February 2021 4,280 3 View

Mental health of COVID-19 Patients?

We want to conduct a study on the mental health and psychological problems in COVID-19 patients and would measure it in terms of Anxiety by Beck Anxiety Inventory, Depression by Patient Health...

02 February 2021 6,401 6 View

Which are the appropriate solvents for n-hexane plant extract for in vivo animal models to avoid toxicity?n-hexane plant extract is not soluble?

My n hexane plant extract is not soluble in any solvent. I have tried water, normal saline, tween 20 (2%, 5%, 10%, 50%), tween 80 (2%, 5%, 10%, 50%), pure DMSO, ethanol (2%, 5%, 10%, 50%, 97%),...

16 January 2021 3,547 3 View

Two antennas at transmitter and receiver both. How to limit signals such that each antenna at receiver get signal from only one antenna?

If I have two antennas at transmitter called T1 and T2 and signals are simultaneously transmitted from both antennas at same frequency towards two antennas at the receiver called r1 and r2. Is it...

16 January 2021 4,765 3 View

How much Morphine Standard is dire need for determination and extraction of Morphine in HPLC technique?

I want to purchase some Morphine Standard for HPLC to detect Morphine rate in Papaver somniferum L. how much is need in every stage or phase?

08 January 2021 1,675 3 View

What are the pros and cons of the Non-orthogonal multiple access (NOMA) scheme on Future Communication Networks?

21 December 2020 9,650 3 View

How Can I convert OD550 (Optical Density at 550 nm) to NTU (Nephelometric Turbidity Unit)?

OD and NTU are two different units, that can be measured through a spectrophotometer and Bioreactor (integrated with turbidity sensor) respectively. Because of the difference in units, the results...

03 October 2020 5,662 2 View

Can COVID-19 trigger diabetes?

06 September 2020 3,017 19 View

Is it possible to get higher wear rate with lower coefficient of friction?

i working on the enhancement of wear resistance properties of coated stainless steal in the absence and presence of various lubricant. In experiments , in the presence of some lubricants, the...

06 September 2020 8,338 26 View

ANSYS FLUENT is only launching in parallel. Can somebody please help?

My fluent is not launching in series at all, even when I uncheck the parallel option and i also have no option for using series. Please help!!! Many thanks!

04 September 2020 4,199 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 View

Do you know any MR image dataset?

I would like to research on MR images (0.5T and 3T). Can you please suggest some websites that I can download dataset including both 0.5T and 3T MR images? Thank you.

02 March 2021 7,735 3 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How to show arrows over the streamlines in CFD-post?

I follow this to make streamlines like the photos attached below: (software- CFD post-processing) First I plot the 2D streamline over a surface "streamline 1". them I plot a vector by the...

01 March 2021 8,668 3 View

Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS?

I need to model masonry and reinforced concrete minarets for my MSc thesis. Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS? (Or any other program for just...

01 March 2021 736 3 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

Can Virtual Servers (remote dekstop manager) run heavy ANSYS Fluent CFD simulation ?

I have a virtual machine. My host Pc specs are not that good thats why i went for virtual servers. so basically my host pc has 8gb of ram with nvidia quadro k2200 4Gb DDR5 GPU ,processor intel...

01 March 2021 8,415 1 View