Calculate sample size for diagnostic tests?

What sample size formula should I use to compare the three area under the roc curve (AUC) obtained from three diagnostic methods from similar sample? MedCalc software gives us the sample...

20 December 2020 5,635 3 View

Dose any-one knows about cleaning validation for pathogens from fermentor?

Hi Dose any-one knows about cleaning validation protocols for pathogen-bacteria from fermentor? In industerial size, 1000 lit?

15 December 2020 4,418 3 View

How can I model mechanical properties of a material using Von Misses-Hill model in Abaqus?

Hello everyone; I am trying to simulate a stent which is made of stainless steel in abaqus and in addition to the elastic properties that are defined by Young's modulus and Poisson's ratio I need...

15 September 2020 1,809 4 View

How can we calculate the concentration of 1000 tons of carbon dioxide in the air in PPM?

Dear All scientists; How can we calculate the concentration of CO2 emitted in the air in PPM? shall we use PPMv(Volume PPM) or Mass PPM is also acceptable? Regards

01 August 2019 7,464 4 View

How can I recall a modified citation style in Mendeley with the name I entered?

When I save as a modified style and change its name, the new style does not show up with the name I have entered for in the styles list. In stead, a general title like "APA-Saeideh" is built...

20 May 2019 6,622 6 View

How can implement print screen key action in c# ?

We can implement for example enter key in c# by SendKey.Send( {"ENTER"}) code. but this method didn't have option for print screen key (reserved for future use ). how can I implement it? My...

29 January 2019 6,161 1 View

How do you control the cancer?

25 October 2018 7,240 3 View

Economic evaluation modeling based on secondary data; which of the following approaches is accurate?

I need to run an economic evaluation model of 6 drugs based on secondary data of a network meta-analysis study which has covered 21 drugs. This study also has reported separate pairwise head to...

03 September 2018 3,174 1 View

Can I run GEE having two within factor variables?

I have one factor as time (3 time points) and the other as treatment( absorbable versus nonabsorbable Sutures that each of them were used on different sides of a scar) so two treatments had been...

08 June 2018 6,220 1 View

How can I make a teeth whitener in the chemistry lab?

How can I make a teeth whitener in the chemistry lab?

02 June 2018 6,306 3 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

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

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 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

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

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View