How to find the dimensions of a patch antenna of a horn shape?

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Looking for help on sem image analysis?

Hello I am conducting a microstructural analysis of a soil treated with lime. The following sem images are of the untreated s1 and treated soil s3. The untreated soil contains quartz calcite...

01 August 2024 572 0 View

Why specific capacitance is not proportional with the specific surface area?

Dear researchers, Why specific capacitance is not proportional to the specific surface area? I have material A with a surface area higher than material B, but material B is showing little bit...

26 July 2024 9,156 2 View

How to Trace velocity plot u(t) using comsol?

Hello How can I get the velocity plot u(t) of a rising bubble using COMSOL like in this tutorial...

24 June 2024 9,441 6 View

How can we select the best energy storage system for our Microdrid, and what are the best energy storage devices to be included?

There exist a wide range of technologies used for energy storage such as electrochemical (batteries), electrical (supercapacitors), mechanical,...etc. What are the best and the most efficient...

17 May 2024 3,412 1 View

Specific capacitance values?

Why specific capacitance calculated from cyclic voltammetery is different from the one calculated from charge-discharge? Ps1: I used the same potential window. Ps2: the charge-discharge curve is...

18 April 2024 9,691 1 View

The amount of water needed during the impregnation?

How much water is typically used during the impregnation step? is there any relationship between the weight of carbon and the amount of water?

12 April 2024 2,952 0 View

I need help designing an H Infinity controller to control a wind energy conversion system ?

What is the best approach to design an H infinity controller for a linear model of a wind energy conversion system, with the goal of simulating it in Simulink? Any specific methods or tools...

26 March 2024 4,008 1 View

Time of N2 injection during chemical activation?

Dear researchers, during chemical activation, when should i start injecting N2 to the precursor? is it at the same time when start heating or until reaching the desired temperature ? thanks in...

23 February 2024 1,307 9 View

How to repair a furnce alumina tube?

the furnace i am using for activation has been damaged, the alumina tube broke , i need a good glue to fix it!

12 November 2023 5,248 1 View

Why i am getting no dischage even after long time?

during GCD, i am seeing no discharge after long time of charging?

12 November 2023 7,295 12 View

Can formaldehyd-fixed gelatin be melt?

I am puzzled about the properties of gelatin, when used for tissue-embedding. Hard gelatin can be melt again by temperatures about 40°C. Formalin-fixed gelatin is like crosslinked protein and...

07 August 2024 1,686 1 View

Why am I getting "shark finn"-like signal?

My collegue and I are having hard time to understand what is happening. Basically we have a tapping device that work with Arduino and a pneumatic pump. The pump allows the tapping of two...

04 August 2024 4,662 1 View

In SEM, if a latent variable consists of three observed variables, and each observed variable has four items, what should I do?

Suppose I am studying the construct of "Academic Motivation" (latent variable) in students, which is measured through three observed variables: "Intrinsic Motivation," "Extrinsic Motivation," and...

31 July 2024 3,913 6 View

Mechanochemistry: ball to powder mass or ball to powder volume?

I run mechanochemical reactions that involves the use of a large amount of catalyst (1:1 molar ratio to the reactant). When I try to understand the effect of amount of catalyst on the reaction, I...

23 July 2024 9,938 1 View

How to find ECC from radiation pattern on cst ?

i need to find ECC for 4-MIMO antenna using radiation pattern on CST

16 July 2024 7,291 1 View

What should I upgrade in my computer to speed up simulation in CST?

I want to reduce simulation time in CST for frequency domain solver by upgrading my computer. I already have discrete GPU but it doesn't seem to make any difference at all compared to integreted...

10 July 2024 2,789 4 View

What is Differential-Fed in microstrip patch ant? How it is design in CST studio? What is process and procedure to do Differential-Fed in CST studio?

What is Differential-Fed in microstrip patch antenna ? How it is design in CST studio? What is simulation process and procedure to do Differential-Fed in CST studio ?

08 July 2024 7,464 1 View

How to know the TM/TE modes in antenna design in CST studio?

How to know the TM/TE modes in antenna design in CST studio? Example: TM01 ,TM02 ,TM10, TM12, TM30 like this... how can identify the antenna is operate the above said mode? can any one explain...

08 July 2024 6,609 2 View

How to give excitation to Crossed Dipole Antenna in HFSS?

I'm attempting to simulate a crossed dipole antenna. For excitation, I've placed a lumped port along each dipole. However, the resulting radiation pattern is similar to that of a single dipole....

08 July 2024 1,876 3 View

For 3d transition metal elements, is there a mathematical expression for the energy E in their hard X-ray absorption spectrum?

Only the absorption side is considered, and the fine structure of the extended side is not considered

05 July 2024 2,894 2 View