How can I calculate teh crystallinity degree of graphene oxide?

I had treat my XRD diffraction pattern by Highscore to calculate the crystallinity degree Xc and I have the formula but I dont no the 2Theta of Ac and Aa to calculate Xc. Is it like polymers...

10 February 2021 6,305 5 View

Insignificant main effects, but signiciant interaction in 4 X 2 X 5 three-way factorial ANOVA?

I ran a 4 X 2 X 5 three-way factorial ANOVA to explore any viable variance in EI (Emotional intelligence) across the participants' age, gender, and YTEx (years of teaching experience), and found...

21 July 2020 5,654 4 View

What is the optimal way to transform coordinate into grid like map ?

Given a set of longitude and latitude, what is the optimal way to group the data into a matrix n*m where n and m would be respectively the height and depth of the matrix?

26 May 2020 2,045 1 View

Please, how and what equipment is needed to measure the kinetic energy parameter E, which is used to evaluate the rainfall erosivity?

Raindrops falling on the soil

23 March 2020 4,238 3 View

What is the minimum value of the coefficient of determination, which may be acceptable for validating a hydrological model?

Coefficient of determination R^2

12 March 2020 9,745 15 View

What is the recommended tool to assess the quality of case-control studies included in a meta-anlysis?

I am working on a meta-analysis of case-control studies. I used Newcastle-Ottawa scale (NOS) to assess the quality of the studies. I couldn't find a good reference to interpret the results...

08 March 2020 7,961 4 View

Titane dioxide (TiO2) in toothpaste : What is the potential risk of the nanoscale particules?

Ratio of micro/nano particules of TiO2 in toothpaste which could be tolerated

04 February 2020 4,134 4 View

I want to use the ECG-ID Database (310 ECG recordings with annotations). How can I read the .atr, .dat and .hea automatically (matlab for instance)?

I want to use the ECG-ID Database (310 ECG recordings with annotations). How can I read the .atr, .dat and .hea automatically (matlab for instance)? Manually It will take ages using the physionet...

27 December 2018 3,311 2 View

Can you help me with providing a program to calculate PbO vs. ThO2 isochorn?

A computer program for the CHIME age calculation to estimate the isochron age from a dataset of ThO2, UO2 and PbO or Th, U and Pb analyses of Th- and/or U-bearing minerals.

21 November 2018 1,137 3 View

What is this curved, different colored band on my agarose gel?

I ran 10ul of a 50ul PCR reaction on a 1% agarose gel in fresh TAE, and I observed this curved yellow-ish band underneath my intended product. The highest band is ~1700bp which is the size of my...

16 July 2018 1,458 3 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 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 relevant is Mini slump cone?

for all the rheology researchers, my question is, how relevant is a mini slump cone (smaller than a standard 50 cent rheometer). currently based on testing, the thickness of slumped material is...

26 February 2021 3,668 1 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

How to reduce residual stresses in MD simulation?

I am working on a preparation of representative polymeric structures of some popular polymers, such as polyimide or PTFE for MD simulation, during which a single nitrogen or oxygen atom will be...

24 February 2021 8,105 3 View

Suggestions for occupational stress surveys?

I am currently writing a masters thesis on reasons for occupational stress in the early childhood classroom, and want to include a short survey assessing participants work-related stress levels. I...

24 February 2021 8,678 2 View

The most suitable method to calculate the stress intensity factor in the presence of contact between the crack lips?

I'm trying to study cracked structures under a compressive load taking into account contact between the crack lips. I would like to know if the method of extrapolation by displacement remains...

21 February 2021 8,694 4 View

How to assign two different material/section properties in Abaqus(UMAT)?

Hi everyone, I am conducting a non-linear multi-layer pavement structure analysis which is a stress-dependent. So far, I am able to define the nonlinearity for one soil layer for its resilient...

11 February 2021 9,607 3 View

Are there any exception like work hardening in metals elastic limit due to dynamic loading?

The samples made out of spring steel are taken from same lot. The specimens were shaped following heating to forging temperature - Forming- Hardening -Tempering methods. After storage of almost 6...

11 February 2021 952 6 View

How to write cyclic loading in OpenSees?

Hi there, I'm having trouble with adding cyclic loading in OpenSees software. My task is to model a reinforcing bar under cyclic loading and compare the response with the experimental results....

04 February 2021 8,158 1 View