Can random sampling have inclusion criteria?

As random sampling means that everyone in the population have an equal chance to be chosen, can it have inclusion criteria? My research participants have been chosen based on the inclusion...

26 February 2021 6,905 10 View

Hye All, Greetings, How can i get surface run off water data?

this is for my thesis project, so this is the title of my thesis, the effect of land use on hydrological components in Muar, Johor, Malaysia any ideas, guidance, and suggestions all? Thank You, :)

02 February 2021 265 5 View

What is the difference of FTIR for functional properties and structural properties of protein?

I need to send my sample to outsource laboratory and how can i tell them that i want to run the FTIR for structural properties of protein? is there any differenece between FTIR for functional...

15 January 2021 8,992 1 View

What's the correct way of treating ordinal variable as continuous in regression?

08 January 2021 920 16 View

Does low pHPZC (Zero point charge) indicates higher negative charged surface ?

I found that, there is a difference in pHPZC value when higher impregnation ratio of acid on adsorbent surface. Lower pHPZC value when higher ratio of acid impregnation and adsorption performance...

05 January 2021 7,224 3 View

Why do I see many vacuoles on my cancer cells?

I am currently growing BICR31 cancer cells for conditioned media collection, and as I passaged it I have seen many bubbles/vacuoles - like structures. Cells were healthy during the first split...

05 January 2021 2,320 5 View

How can be the Virus COVID-19 become mutation?

The current situation the virus become mutation, but there were information that zero percent case in Wuhan?

31 December 2020 2,457 4 View

Why does activation process called as activation? what does the term means actually?

I'm referring to activated carbon activation. Activation process does increase the surface area and functional groups content in activated carbon compared to biochar and raw biomass. But I'm...

30 December 2020 6,514 1 View

What is the good water absorption value for construction materials (brick, mortar etc.)?

According to many construction standards such as ASTM, a good construction material should have a water absorption value within 20%. However, if we compare with many water absorption values (from...

26 November 2020 8,538 8 View

What sample extraction/ preparation needed prior HPLC test?

I want to screen the presence of plastic additives in a few water samples using HPLC-UV. I am very new to HPLC, and after doing a reading on the sample preparation for HPLC, I found there are a...

19 November 2020 2,724 4 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View