How the wettability of rock sample can be changed by ageing in pure hydrocarbon oils only?

I want to do wettability analysis of hydrocarbon oil (octane)/rock/surfactant solution system. but to do the analysis first I have to make rock surface oil-wet. Since hydrocarbon oil does not have...

27 February 2021 5,383 3 View

How to select therorical or conceptual framework for any proposed qualitative research work?

Hi, I am conducting an exploratory research with qualitative in-depth interview approach to understand the impact of COVID_19 in health systems response to burn care in India. Since, this is a...

19 February 2021 4,562 4 View

Do you have any experience of taking astaxanthin supplement?

Astaxanthin is a keto-carotenoids having reddish color. It occurs naturally in certain algae and causes the pink or red color of different seafood especially salmon, shrimp, trout, and lobster....

29 January 2021 7,861 2 View

Can you suggest me how can I use D2O for dissolving chitosan sample for NMR analysis?

I am trying to dissolve chitosan with pure D2O but it is not dissolving. I read some articles that used D2O for dissolving chitosan before 1H and 13C NMR analysis? Do I need to do some...

14 December 2020 6,931 5 View

How many chapters (objectives) are necessary for a standard Ph.D. thesis?

This question is focused on biological, chemical, and material science. I think the answers also will help the future Ph.D. students for writing a good Ph.D. research proposal.

10 December 2020 2,090 34 View

How to obtain Reitveld Refinement of a nanocomposite (Ni doped in CdS) and how to put the crystallographic information of both elements in Full Proof?

As the crystallogarphic information of one element is considered easily to obtain Reitveld Refinement of nanostructure but to obtain Reitveld Refinement of diffrent elements doped in one is a...

20 August 2020 6,272 3 View

What is the criteria of scoring index in research gate?

Does it depend on co-authors, journals, citations or follower? I have seen many people who has no single research paper, no citation and only one co-authorship and new-bee without a follower in RG...

06 August 2020 3,278 27 View

What will be the roadmap to implement in matlab the power adaptation at transmitter side for optical wireless communication?

In my research, I have to implement a power adaptive transmitter in free space optical communication. Please guide me.

27 April 2020 2,406 2 View

What are the ways to clean the core sample flooded with nano particles?

Core cleaning is a challenging task. In the case of chemical flooding, core samples are generally cleaned by methanol and toluene but in the case of nanoparticles, I am not able to get any solvent...

04 March 2020 5,713 7 View

Surface-based cohesive behaviour: ABAQUS properties?

URGENT! Dear all,I'm currently modelling the masonry wall in ABAQUS using simplified micro-modelling approach. My model didn't go really well, I believe could be something to do with the...

27 July 2019 5,425 5 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

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

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

Efficiency of Proximity Feed Patch Antenna ?

Greetings to all of You! I have searched some research papers for the designing of a proximity coupled patch antenna. Researchers are talking about the impedance bandwidth of the antenna but...

24 February 2021 7,662 3 View

2D or 3D phased array antennas??

Dear All, I will start my PhD maybe this year regarding phased array antennas. I'm interested in to find more detailed information about 3D phased array antennas and 2D phased array antennas. Then...

21 February 2021 368 3 View

Helix antenna coupling problem?

Dealing with a helix antenna, made with flexible material and not rigid like using a PCB board or wire. At the beginning of the helix is too close to the ground plane, causing coupling. How can I...

21 February 2021 4,453 3 View

Is there a way to use waveguide ports for circular antenna design in CST?

Hi, whenever i use circular array i get this error "Waveguide ports must be aligned with Cartesian coordinate planes for the transient solver" Does anyone use circular array with waveguide ports?...

09 February 2021 3,609 8 View