How to improve results of system identification procedure?

Hello, I'm performing system identification of the lateral closed-loop dynamics of a quadrotor. My model receives a setpoint and should return position and acceleration. I've proposed a second...

07 February 2021 9,791 2 View

What is the maximum time duration allowed between photoresist coating and exposure?

I have coated the Silicon wafer with photoresist (AZ1518) but until the exposure (Laser Writer) I had to wait for more than a week (Laser Writer was not operative) - would the photoresist still be...

03 January 2021 9,640 4 View

What would happen if all nitrogen atoms in DNA were replaced by Carbon atoms ?

The DNA molecule is in the form of a double helix, The atoms which compose it are carbon, nitrogen, hydrogen, and phosphorus

02 January 2021 4,402 3 View

Which is more important for a journal? The impact factor or the quartile ranking?

I always found confusing both concepts! Which one do you think is more important? I give an example: The journal of "Theoretical and Applied Climatology" has an impact factor of 2.88, but it's a...

01 December 2020 8,608 19 View

Who can collaborate with us?

Salam (Hello)! We have prepared some new compounds with important potential to inhibit viruses. We are interested in inhibition of Hepatetis-B/C, Nipah, Nil and coronavirus. Who can collaborate...

22 November 2020 3,850 14 View

What is the most effective way to transfect HAP1 cells?

I am starting a project with the HAP1 cell line and previously our lab has had difficulty to transfect them. -we have nucleofection equipment - but have only been getting ~10% transfection -i...

19 October 2020 5,340 2 View

What effect do epidemics have on cerebral physiology?

How trauma and fear of infection can affect brain functions and structures?

10 October 2020 6,642 1 View

What are the XRD analysis conditions of the cement, sand and Limestone ?

I am a Phd student and I need to do XRD analysis on my pouder samples namely ( cement- sand- limestone and calcined clay). I was asked asked to specify the analysis conditions: -the nature of...

07 October 2020 5,737 6 View

Why I couldn't obtain a gel from APTES? Does the Amine group affect the gelation process?

I am trying to make a gel from APTES as a precursor using the sol-gel reaction. I tried different solvents (ethanol, acetone, DMF) and different catalysts (basic and acidic) with different...

03 October 2020 9,673 5 View

Best meta-analytic approach with Mean, SD, Sample size for regional values of MRI measure?

I'm interested in evaluting the evidence in the literature I've collected for spatial/anatomical variation in an MRI measure. The data consists of mean values, standard deviations and sample...

14 September 2020 8,910 1 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How can you bring two structures together to create an adhesive bond in LAMMPS?

I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....

01 March 2021 3,325 2 View

How to make a time series imputation benchmark ?

Hello ! In a work, I have to benchmark different algorithms to fill in missing values in time series. I insist on the fact that this is imputation and not forecasting. In my case, I have access...

24 February 2021 7,470 7 View

Steps to calculate activation energy by coats & redfern method?

I'm a chemistry student and I'm researching the kinetic degradation of mixed plastic waste. I'm having trouble calculating the activation energy by the coats & Redfern method. The data that...

24 February 2021 974 1 View

I am looking for a simple software program to model 3D chemical bonds. The purpose is to generate high-quality graphical abstracts. Any suggestion?

Hello everyone: I am looking for a simple software program to model chemical bonds. The purpose is to generate a high-quality graphical abstract for a top leading journal in the field of...

23 February 2021 8,012 3 View

What kind of steel moulds are used for hot pressing metal powders?

My main concern is that the metal powders should not weld to the mold surface and I should easily be able to eject out the pressed samples. I am looking for alternative for graphite moulds. The...

22 February 2021 2,965 4 View

How to interpret this FTIR spectrum of pyrolyzed hydrochar?

20 February 2021 2,840 3 View

Droplet PCR in plastic chips always result an unexpected band, any suggestion of possible contaminations and how to improve?

I am doing droplet based digital PCR inside plastic chips. I can get the correct band, but I also consistently get an unexpected band, slightly shorter. I attached a typical gel image here....

18 February 2021 6,618 2 View

What is error #2070 in gaussian.how we do resolve it?

We want to ONIOM calculation in gaussian16. However, gaussian doesn't work. What should we do? Atom 15 layer R linked to atom 85 is also bonded to atom 161 in layer M bad...

15 February 2021 7,766 3 View

Inquiry regarding engineering journals for free publications for my dissertation (laser polishing of 3D printed parts?

my dissertation was on laser polishing of 3D printed plastic parts, i want to publish it, can anyone suggest me a free copy engineer journal for this purpos, plz?

01 February 2021 7,140 4 View