Hello house, is it necessary to compute Content Validity Ratio (CVR) for an adapted questionnaire pls?

What should one do if he obtains conflicting results between Content Validity Index (CVI) and CVR for items in a quetionnare. For example based on the CVI obtained the items are acceptable but the...

25 February 2021 7,325 2 View

Can cells be reused after using WST 8/ CCK 8 from Sigma Aldrich?

Hi all, Can cells be reused after I have seed them onto 96 well plates and test them with cell counting kit at OD450 (CCK8) at 12 hours, wash them with PBS x3 and add new media and let them...

24 February 2021 5,072 1 View

Does it mean my paper will be published if the editor encourages a full submission from me?

Hello everyone, I am new to journal paper submission. I submitted an abstract to a paper last month in reponse to a 'call for paper'. An editor came back to me a few days ago saying my abstract is...

26 November 2020 5,370 11 View

How to crystallize curcumin from ethanolic turmeric extract?

I'm having difficulty recovering curcumin from my ethanolic extract. I tried reducing its solubility in the solution by slowly adding water, but the solid just crashed out of the solution in very...

03 September 2020 3,020 5 View

Is it natural to observe shifts in spin-orbit splitting values of an element for different stoichiometries or compounds containing that element?

Hello, In XPS measurements, I am observing consistent shifts in spin-orbit splitting values for different oxides of the same base element. I'm being told by many that this is not possible, that...

25 May 2020 4,389 3 View

How Do You Incubate Microfluidic Chips with Cells?

Hello, I am interested in this research field. I have the prototype of my microfluidic chips, but I am having a hard time finding literature that says exactly how they incubate their chips (with...

21 April 2020 3,277 5 View

Has anyone carried out public health expenditure reviews on spending on nutrition in their country ?

If you have carried out national budget analysis for nutrition expenditure I would love to read your research findings

03 October 2019 5,213 2 View

What technique can be used for imaging wet hydrogels?

I'm working on alginate-based hydrogels and I want to observe the microstructures (porosity, roughness, etc.). The hydrogels were produced by gelation in aqueous calcium chloride. SEM is out of...

30 August 2019 2,863 4 View

Does anyone know how and can share how to suspend and spray dry tungsten carbide in an aqueous medium?

I am looking to create a slurry of tungsten carbide to generate press ready powders in order to fully density our laboratory scale small parts for testing. If anyone can share how to suspend WC...

12 June 2019 5,630 3 View

What is the best strategy to launch a technical product that solves an educational problem?

We have designed and launched a research platform that enhances the student - supervisor relationship during a research product. The platform encapsulates the process of conducting and managing...

23 January 2019 6,221 2 View

What are backpropagation formulas for residual neural networks?

14 February 2021 4,194 3 View

Has anyone used Pro-Touch color bands to mark raptors?

We have been color banding American Kestrels using A-craft alpha-numeric color bands since ~2013 and would like to test other options. I am curious if any other researchers have experience using...

01 February 2021 6,786 3 View

How to obtain the plot of frequency shift w.r.t. pressure in a micro resonator (cc beam) based MEMS pressure sensor in COMSOL?

I need to know how to plot the impact of pressure (0 - 100 kPa) (which is applied on the back side of diaphragm) on the frequency shift caused in the cc beam supported on the diaphragm with...

01 February 2021 5,805 17 View

How to measure beam radius over some distance in Lumerical fdtd (Collimation evaluation)?

31 January 2021 6,354 2 View

Should I make 2 helical antennas? One for 2.4 GHz and another for 5.8 GHz?

Should I make 2 antennas, one for 2.4 GHz and one for 5.8 GHz? How should I approach the problem if I want to design the antennas which cover 400 and 900 MHz and 2.4 and 5.8 GHz? All together in...

26 January 2021 906 3 View

How can Plasmonic nanoparticles with different shapes be simulated using FDTD if they are imbedded in Organic solar cells ?

I need help on how can i simulate Organic solar cells with Plasmonic nanoparticles of different shapes using Lumerical FDTD . Is there any body familiar with such simulation and can share...

26 January 2021 4,188 3 View

Why transmission power drops with Lumerical FDTD simulation time?

Hello everyone, I am trying to design a ring resonator in FDTD. I simulated the design and found transmission power dropped by increasing simulation time. Once I increased the simulation time the...

21 January 2021 4,872 4 View

Does anyone know about vision-guided control of civil structures?

I would like to know more about the following issues: 1. Using images as feedback for the closed-loop control of civil structures 2. Simulating the vision-guided control on the computer without...

03 January 2021 7,566 1 View

Simulation of a Prestress Force Monitoring for PSC Beam using ansys fem package?

Any person who can help me in simulation of a Prestress Force Monitoring for PSC Beam using ansys fem package.

01 January 2021 2,588 2 View

Among All the environmental pollutants how much % out of 100% are due to chemists?

Environmental pollutants and hazardous are major issues through which the modern world. Among all the environmental pollutants and hazardous materials how much contribution is from chemists (out...

31 December 2020 833 7 View