Why am i not getting solid after reacting APTES with salicylaldehyde?

The reaction of APTES with salicylaldehyde in ethanol leads to the formation of imine compound yellow solid which is mention in literature, but I am not getting yellow solid I don't know why? when...

28 February 2021 2,955 2 View

Use of Sine voltage source in Electrical circuit with frequency domain study in COMSOL?

Dear Sir/Madam I want to use Sine voltage as a source in an RLC circuit. I want to study the driving point impedance with frequency sweep. But when I use sine voltage, I get an error like The DAE...

13 January 2021 9,826 5 View

How to find Inverse Laplace of a large matrix in MATLAB?

I am trying to find out the inverse Laplace transform of the state transition matrix obtained using inv(S*I-A). Where I is the identity matrix, and A is a state-space matrix(24x24 matrix). I have...

21 December 2020 7,041 3 View

Why gel electrophoresis is taking too much time to run ?

I am working with TBE buffer and prepared 1% agarose gel. Previously it was taking around one hour to run but now two and half hours. I have increased the voltage from 90 to 110 but this also helped.

08 December 2020 7,416 5 View

What are the recent research topics in field of Soft Robotics based on AI and ML?

I am working in the field of practical robotics since last five years and got acquainted with AI and ML recently. I know Python and learning AI and ML using python from different sources. I want...

24 October 2020 793 6 View

Why does not graphene exist as a proper 2D sheet?

We know that graphene is the strongest material as it has high tensile strength. Then why does it exist as flakes? Why we cannot make a complete sheet out of graphene?

18 May 2020 8,820 4 View

Can Solar Energy take part in fighting against COVID-19?

Can "Solar-UV-cellular-damage" be an effective method to disinfect water bodies against COVID-19 in countries with a hot climate?

10 May 2020 2,556 12 View

While performing energy minimization step in GROMACS I am getteing following error. Can anyone help with this minimization problem?

gmx mdrun -v -deffnm em Back Off! I just backed up em.log to ./em.log. Running on 1 node with total 8 cores, 16 logical cores Hardware detected: CPU info: Vendor: GenuineIntel Brand:...

11 March 2020 2,902 1 View

What are the initial values of different ion concentrations?

What are the initial values of different ion concentrations(Electron,+ve and -ve) should be taken while simulating the partial discharges between different electrodes(point-plane, point-...

11 March 2020 6,325 4 View

What is iodine number in terms of activated carbon? What are the effect of iodine number on activate carbon porosity ?

11 March 2020 5,239 3 View

I have designed reflectarray element and feeding it though Horn Antenna on HFSS. After full wave simulation, I am not getting desired results?

I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern...

01 March 2021 9,701 5 View

Timeout error!! Processor in the loop (PIL) using STM32F4 Matlab 2018a?

Dear Researchers I am trying to perform a PIL simulation using STM32F4 Discovery board and comunication serial USB TO TTL. During simulation I receive the following timeout error: An error...

01 March 2021 2,327 1 View

How to eliminate Steady state error from Reinforcement learning genetic algorithm code?

The following code (see 1st 2 images attached) is used to produce PID controller values that are designed to control the system (G). The code finds the PID controller values (noted as k) by using...

28 February 2021 6,560 14 View

Does the circuit modeling for planar monopole antennas using Foster canonical forms give good approximation?

Hi researchers, I am searching for some accurate way to do the circuit modeling of planar CPW-fed monopole antennas. I have gone through the literature where mostly circuit modeling is done using...

28 February 2021 7,016 1 View

Microstrip antenna design tutorial of HFSS 3D layout module ?

I have designed a 24 GHz rectangular antenna on HFSS 3D model and got desired results while desing the same antenna with same dimensions I am getting resonance frequency at 27 GHz I am...

28 February 2021 4,426 2 View

How to prevent ANFIS Model from negative prediction values in MATLAB?

I have input and output data set for "ANFIS modeling in MATLAB", and I am getting some negative predicted values of output in testing. However, the predicted values of output in training are...

28 February 2021 3,459 3 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

Compact antenna for the frequency range 1 MHz-5 MHz?

Hello everybody! I have a problem with developing a compact antenna for the 1MHz-5MHz frequency range. Tell me what type of antenna can be used and what books and articles to read to perform this...

27 February 2021 7,710 4 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

How does an AC-DC power supply Flyback Converter Based USB Charger Model using Matlab/Simulink looks like?

I am required to learn about Flyback converters and I got stuck not knowing to full design of the power supply flyback converter Based USB Charger Model using Simulink, especially the design model...

25 February 2021 5,435 2 View