Do I have to get consents for thousands of samples in my ethical approved retrospective study ? What about passed away poeple ?

More Hassan A Al-Jafar's questions See All

How to determine the false positive sequencing result?

Hello Researchers. I am conducting a study on the determination of WNV on mosquito samples. I run nested PCR. Bands were shown to almost all samples during carrying out gel electrophoresis. After...

17 January 2021 3,263 11 View

How can we increse the osmotic pressure of a solution while maintaining the electrical conductivity of the solution?

in other words what kind of salts increase the osmotic pressure with the same salt content. for example 1g of NaCl or 1 gr of Na2SO4 or KCl or ....

25 January 2019 2,610 3 View

Dental decision support systems by Image Processing and Data Mining?

Intelligent Therapist Designer for Dentistry with Data mining and image processing

18 January 2019 9,288 3 View

Surface treatment and finishing for BiFeO3?

Hello everyone, I want to do surface treatment for my sol-gel synthesized BiFeO3. For this purpose if anyone have a kind suggestions regarding methodology that how to do and which way is better...

26 December 2018 7,295 7 View

How to check valence state of Cr using UV vis spectroscopy?

I want to ask about how to get the accurate valence statr of Cr in solution form? As from XPS I found it is +3 but somebody ask that Cr+3 can not be attached on material in acidic solution. So ask...

10 December 2018 2,502 3 View

Can we measure the employee performance by asking employee directly instead of their managers? or if anybody have measurement instrument please Share?

I want to study the impact of Social media usage on employee's performance so therefore i need measurement instrument for employee's performance if anybody can help me, or wants to give me some...

30 June 2018 3,071 10 View

Can mosquitoes be homogenized with mechanical homogenizer without beads?

I am a master student under virology program. Currently, I am working on determination of virus among mosquitoes population . Based on previous study, most of them used bead-based homogenization...

30 May 2018 6,836 15 View

Kidney stone: study of medical geochemistry ?

Please provide me with an illustration of XRD and IR card.

03 April 2018 7,551 4 View

Has nano-emulsion fuel technology been applied on an industrial scale?

Nano-emulsion fuel technology has been around for some time. However, its use has not yet been fully established for different reasons. I would be interested to know of any plant or industry where...

03 April 2018 6,062 3 View

Does any one have these books (X-ray diffraction and IR) and the identification and analysis of kidney stone ?

Please provide me...

03 April 2018 2,613 0 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

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 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

Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View