Dual feed dual polarization antenna can operate at same frequency?

I have been working on an array of simple rectangular microstrip antenna (not aperture coupled) for dual polarization with dual feed. I am finding it very hard to make the operating frequency of...

06 August 2020 8,124 3 View

How to use phase change material and nano particles in solar still?

can we directly add nano particles with saline water? and how to use PCM at which location it needs to be placed?

21 February 2020 9,237 2 View

PVLIB PYTHON: Is there any function in PVLIB for calculating energy output with power optimisers?

Dear all, I am using PVLIB Python script to calculate energy output. I am analysing the data with Trina 275 Wp Solar module and Solar Edge HD wave inverter (with power optimisers). In the attached...

19 January 2020 9,514 3 View

Is PV_LIB Toolbox (mono and bifacial model) by Sandia well accepted within PV community? Where is the scope for improvement in the modelling script?

PV system can be optimized for different design parameters such as tilt, azimuth angle, row spacing, etc to maximize the energy and economical benefits. Where is the scope for improvement in PV...

18 May 2019 3,361 1 View

Pls. guide to generate correct regression model connecting 4 inputs and one output. I faced problem generating model on SPSS ?

I am using 18 data sets for generating the model and 09 data sets for testing the model and finding Coeff. of regression R2. The SPSS software gives me R2=1 which is not correct as there is...

13 September 2018 2,169 2 View

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

03 March 2021 8,272 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

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

Why do a weight decrease for thermal degradation in nitrogen gas condition?

Hi all The question is related to TGA(Thermogravimetric analysis). Thermal degradation easily understood but why do samples weight decrease? altough just binding is broked, the weight of...

26 February 2021 1,100 5 View

Can thermal cycler machines be problematic during PCR?

Hi, my question is about the heating of thermal cycler machines and I hope some of you had experienced a similar thing previously. There are two thermal cycler machines in the lab(BioRad) and for...

26 February 2021 4,777 4 View

What could be reason for getting such type of graph for complex impedance in case of polymer blend films?

Its effect appears in real part of ac conductivity also. Can anyone suggest any reason behind it?

26 February 2021 3,487 3 View

Modeling viscosity using model of Chung?

Hello, As part of simulation of gases mixture and water, I need to calculate viscosity of the fluid components and I am using relationships proposed by Chung et al. (1988). The irony is while I...

25 February 2021 8,053 5 View

How to increase solubility of Poly acrylic acid in Dioxane solvent?

I am working with Polyacrylic acid (100.000Da) and instead of water, I need to use another solvent (dioxane) to dissolve PAA. However, because of the high molecular weight, it's quite hard to...

25 February 2021 2,225 5 View