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# Phase - Science topic

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Questions related to Phase

metal carbide and nitride specly 4 5 6 group transition metal carbides and nitride.

I want to simulate the plasticity for the Ti and its alloys with two phases (Alpha and Beta) in Abaqus. Now I have already created the microstructure model but unsure what properties I should assign to its two constituent phases, namely alpha and beta, as I only know the bulk material parameters (e.g., Ti-10Mn)?

Alpha and beta are part of Ti-8Mn; the only difference I see is that one will be HCP while the other the BCC structure, so how do I create such a material?

The term "phase" is always a confusing thing for me. When we recoding images, we say that we have recorded the amplitude and phase. Amplitude I am able to relate/ physically understand by connecting with intensity. As, intensity increases, the amplitude will also increase. But the phase term is still I am not able to digest. I am not able physically understand the phase term, like understand the amplitude term. Can anyone explain this?

I have studied the mathematics of Phase. But I am not able to physically relate it.

Dear all,

I am trying to find a way to find dispersion curves of plates using Rayleigh-Lamb frequency equations. I used a repetitive procedure by sweeping through the frequencies and inside it increasing the phase velocity incrementally to find the roots of the equation.

In each frequency, there is some roots of phase velocity. As symmetric and asymmetric equations are already separated it is easy to separate data points of the two different waves. However, at the end of the process we have just (W frequency , Cp phase velocity) datapoints and after plotting the result we can see the behavior of the curves to manually define the mode number.

Main question: One way of clustering the data to different modes is to sweep through the data and define the first Cp as the mode zero, the second one as 1st mode and so on.

1. What if we had a crossing between curves?

2. I got some identical roots derived from both symmetric and asymmetric equations. How can one distinguish these datapoints correctly for the type of wave they belong?

Many thanks in advance for your help.

Mohsen

Are both the phases crystallographically same? Can WS

_{2 }exist in both the phases or not? I have been trying to make cubic BaTiO3 nanoparticles in ambient conditions but could not do so. The solid-state route that I tried ended up melting and sticking of BaCO3 powders in the crucible. I am not able to find some convenient chemical route either for making these cubic BaTiO3 nanoparticles. Please also suggest a way to get dense ceramic (I mean sintering parameters) out of these cubic BaTiO3 nanoparticles.

IRS modify the phase and Backscatter device adjust the reflection coefficient. Backscatter device can modulate its information symbols over incident carriers by intelligently changing its load impedance and IRS can also modulate its own information. So, how they are different from each other ?

I was trying to research about an automatic phase splitter project for 3 phase induction motor but Google will give me results for automatic phase inverters. When i tried to find the definition, it confused me and i couldn't point out their difference.

I have read that to know the composition of different phases in a ternary phase diagram of metals A,B,C (at a particular temp. T), we can apply lever rule along the tie line. But, I am not sure about how to draw the tie line and how to apply lever rule along it as some procedure says to use line and few have mentioned smaller triangles to draw (tie-triangles) to know the composition of the phases. Kindly illustrate on the concept. Thanks in advance for help.

I obtain the image attached when using an in-house design with a Taqman probe. The template is a synthetic DNA. Which could be the problem?

Thanks in advance

What are the difference between the crystal structure, lattice parameters, and wyckoff positions of atoms in X2YZ system in L21 and B2 phases?

A photon is a wave-packet which can be Fourier expanded as

(1) Σ

**exp[i(**_{p}**pr**-*Et*)/*ħ*]The phase velocity, i.e. the velocity of propagation of the phase, is obtained for each Fourier component by requiring

(2) φ

**= (**_{p}**pr**-*Et*)/*ħ =*const.Taking the time derivative one gets

**p**d**r**/d*t*=*E*, i.e. the well-known relation,(4)

**pv**^{φ}**= E.**^{p}The phase velocity

**v**^{φ}**is not the same for all the Fourier components, some of them propagate more quickly and some more slowly. Some propagate faster than c, some are slower than c, leading to the dispersion of the wave-packet after some time.**^{p }**The universal constant c is the***group velocity*, not the phase velocity.**WHY the group velocity has more physical significance than the phase velocity? And why all the photons have the same group velocity, c?**

I have another question regarding the relation between the thickness of the substrate and reflection phase of FSS.I have observed different results for different thickness i.e. the thickness of 1.6mm phase is changing +180 to -180 and extends more than -200 by adding the phase progressively, whereas with the thickness of 0.8mm it is changing from +180 to +100 and then suddenly rises to +235 degrees at the resonance frequency.Then after again decreasing as the frequency increases, but overall this value is having positive phase.

Can anyone explain the reason?

Bandgap=1.74eV is for which phase of CdSe?

how to bring metallized spheres at the surface of the formulation. what I am facing is that metal coated glass spheres are sinking in resin system so it could not get the light reflection that I want. Is there any ways that - plausible in solid compositions-

that I can use to bring glass spheres on top ?

I was thinking to create surface tension difference which might lead to phase separation but since there is NO solvent\water , I could not accomplish.

Can any one suggest a stable electronic circuit which can measure very low phase angle, of the order of minutes between two sinusoidal voltages at power frequency.

I am going to create phase-randomized surrogated time series [they can be generated by randomizing the phases of the Fourier transformed components of the original time series between 0-2pi] for my daily or monthly time series, but to keep the cycle of fluctuations in the generated times series I want to keep the original phase related to the most significant frequency of my original time series in the generated ones.

I found the most significant frequency of my original time series which is 0.002738601 and so is related to the period (T) of 365.1499 days which means it is related to the Annual Cycle.

Now I want to keep the original phase related to this frequency in my generated time series, while all other phases are randomized between 0-2pi.

I can make my phase-randomized generated time series but I am not sure how can I keep the phase related to a especial frequency in the generated time series.

I changed the format of my question by removing my codes and explaining it more clear.

I am doing my coding in R, but this question can be assumed as a general question related to signal analysis.

Hi all,

I'm performing a total nucleic acid extraction from viruses as follows:

- lysis of capsids by EDTA+SDS buffer with proteinase K, incubation 1 h at 55C.

- addition of protein precipitation reagent (likely ammonium acetate).

- spin 10 min at 10,000xg and then transfer supernatant to a new tube.

- add 1 vol of cold isopropanol. Mix by invertion (30x).

- Spin 30 min at 20,000xg....

My problem is that after this last centrifugation, a bottom bubble of aqueous phase is formed in determined tubes.

Curiously, the bottom bubble is only formed in those samples in which initially the virus in 1 M sodium citrate buffer. Samples for which the virus was in ascorbate-Na2EDTA buffer didn't show bottom bubble after centrifugation with isopropanol.

What's the problem here?

thanks!

Hello:

I´m working on an analog active crossver in the audio range and need to achieve zero phase (or close to it) in the pass band. I have tried several prototypes but now I discover several differences between the real components (opamps) and the simulations (i tried a 5532 from internet and the 741 from Texas and both showed differences, one in amplitude and the other in phase).

I´m a bit stuck and don´t know how to face this challenge. I already asked in facebook groups, linekdin and here at university, but I´m not clear about how to fix simulation issues and how to organize the design process. This is my first electronics design job, so any help will be appreciated.

I am observing the shift in peaks in a mixed phase system (2 phases). I observed the peak shifting is more at higher angles i.e if it is 0.2 upto 2 theta =30 degrees which increases to 0.4 towards higher 2 theta value. What is the possible reason for this? In addition I would like to ask is it possible to have peaks corresponding to high 2 theta value without seeing significant intense peaks (by any means) .

i try for finding by using the formula given in attach file but in vain. The reported value for a, b and c is same that i find for 'd'(inter planner spacing) in each case.i want to find a, b, c values by using 'd' in given formula.

Any body can help me....?

I am constructing a dynamic model (using ordinary differential equations) of Three Phase Fully Controlled Unidirectional Rectifier. And I am facing problems regarding the triggering logic of Thyristors. I would like to know if anyone can give any suggestions regarding various methods available for the triggering logic of thyristors (especially for the dynamic model). Any help would be greatly appreciated.

Thanks in advance.

I couldn't get a satisfactory yield of 1-hexadecyl imidazole using the attached method. Can anyone suggest me a better way to get a higher yield?

* 1-bromo hexadecane was used Instead of 1-bromooctadecane,

In addition, if two microwave have the same phase, does it mean they are coherent? Thanks

I have toluene solution of a monomer. If i heat the toluene above it's boiling point in an auto-clave, will there be some monomers molecules too in the vapor phase? Actually I need these monomer molecules in vapor phase for surface reaction on a solid (covered with the other monomer). Thanks

In case that the p and q are predefined, which the most complicated phase in RSA algorithm. Is it the computation of "m^e mod n" ?

magnitude and phase calculation for multi-degree of freedom system using frequency domain method??

Acinetobacter baumannii: An Emerging hospital based pathogen,whose morphology seems to be Coccobacilli, however, It gives few rod and spherical morphology also in my ESEM images. apparently, this is not contamination for sure. I repeated this thrice but getting same morphology all over again.

Moreover, some literature suggest that during the log phase, baumannii appears as rod shapes but during stationary phase its turns to coccobacillus.

Does anybody have any Idea? regarding its morphology, I would be grateful! to receive comment over it.

I am working on a plant fraction and its weight is 24 mg.. I tried it on TLC normal phase using CHCl3 methanol system 10;1 and reversed phase using methanol; water 8;2 but there is tailing which makes it difficult to run on HPLC .. so what is the solution

Does light change phase when reflecting off a metal surface?

It seems to be an amorphous phase but I could not identify it !

From the literature, I know that ZrO2 have different structures at different temperatures i.e. monoclinic (m) at room temperature (RT), tetragonal (t) at 1478 K and cubic (c) at 2650 K. I want to calculate the energy of all the three phases (m, t, c) at above mentioned temperatures i.e. at RT, 1478 K and 2650 K. My expectation is that (m) phase should have the lowest energy at RT among the three, (t) phase should have the lowest energy at 1478K among the three and (c) phase should have the lowest energy at 2650 K among the three. How should I go on with such simulations in LAMMPS? Which thermostat to use and how to define temperatures that I wish?

What analyte could not be separatet by Reversed Phase Chromatography? Ionic ones? May there are some Others?

Dear Colleagues

Greetings

I would like to ask about the CuS and Cu

_{2}S pahses, why CuS is more conductive and less transparent than Cu_{2}S phase?Thank you

Fayroz

Provide me some simple and easy to learn, that how to calculate the complete efficiency during photosynthesis, in both macro and micro phase.

I've tried selfing on the same umbel by brushing with Kimwipes, but it doesn't seem to have worked. Maybe crossing from male-phase umbel onto a female-phase umbel? I'm not sure if the phases overlap enough. Anyone have thoughts?

Hi everyone. Please clarify me the basic question related to filters.

As we know that the ideal magnitude response of low pass filter is shown in Fig below. It signifies that, it passes low frequencies and attenuates high frequencies. Similarly, please clarify me what is the significance of ideal phase response of low pass filter (order may be two or three) with Figure (ideal phase response of low pass filter)? Thank you.

How can I use Phase modulator to apply quadratic phase on previously generated pulses from intensity modulator?

I’m facing some challenges in calculating

*Standard Means Difference*. Student A obtained zeros in all baseline sessions. I subtracted the mean of the baseline phase (*M*= 0) from the mean of the intervention phase (*M*= 13.41) and then divided by standard deviation of baseline (*SD*= 0). The results will be error.Any thoughts?

three phase unbalance power flow using backward-forward method

I am interested to know about the Golay plots in Gas Chromatography.

Hello Dr. Gavril

I am taking a theory on chromatography class. I came across a question in which our professor wants us to do some research. I am wondering if you can steer me in the right direction. The question is:

The mass transfer in the stationary phase in negligible compared to the mass transfer in the gas phase. Show that this assertion is true?

I am trying to calculate the interfacial energy between two crystalline phases. Any guidance in this matter will be very helpful.

I am simulating the effect of an grid voltage amplitude imbalance on a PLL structure. However, I want to know if an amplitude imbalance (e.g. a sag in phase A), must be accompanied by a phase imbalance as well. Is it a realistic to simulate amplitude imbalance while the phase remains the same?

How to find out the hkl values and phase corresponding to the smaller d spacing (below 1,eg.0.279) obtained from SAED pattern analysis?

Using reductive perturbation technique we have derived the KdV equation and there we are getting the phase velocity 'u' as a complex number under some conditions. In that case, what can we conclude?

Options a) -40Hz b) 0Hz c) -22Hz d)20Hz e)None of the above

I have heard we can use the phase and amplitude modulation of SLM to implement a lens on SLM. How should I do it, please provide some references. Thanks

I am asking about Al-Cu and Al-Cu-Mn allloys.

I have some diffraction patterns and i am attaching.

Except one pattern i dont know what phase is it. Either Al

_{20}Cu_{2}Mn_{3}or Cu_{3}Mn_{2}Al...please let me know how to do analysis and suggest some literatrue...

If anatase, rutile and Brookite phases are present, how would you calculate the percentage? Is there any software available like Rietveld Analysis?

I need .cif file for Ca-Sialon which i couldn't find on online database. It would be great if someone could provide me the .cif file.

Regards

Bilal

Hello,everyone.

1,can I extarct spiramycin from fermentation broth using PEG4000/PEG6000-Na2SO4/(NH4)2SO4 system?

2, if the aqueous two-phase system is formed, how can I know which is the PEG-riched phase or aqueous-riched phase?

I'm working conversion of glycerol to value added value added product in gas phase. i want to convert liquid phase to gas phase. if any external vaporized processes? how? or any system? or general idea liquid to gas?

Hello,

I am working on a piping network consisting of one inlet and two outlets. I am introducing air(primary phase) and water (secondary phase) into this network and I am interested in finding out the mass flow rate of each phase through each outlet. For this purpose I am using Eulerian multiphase model in Ansys Fluent. The problem I am facing is, the mass of each phase coming out of the two outlets is actually greater then the mass introduced at the inlet.

Can anyone help me with this ? Thanks

Has any one used a voltage controlled phase shifter in the measurements of phased arrays? i need some help in clearing some ambiguities regarding the use of voltage controlled phase shifters in phased array radiation pattern measurements. Your response will be highly appreciated.

sampling rate is 100Hz

please suggest me

The material is sinergle phase and present size lies in range of micrometer. I desire to increase up to mili meter range.

In Phase measurement Unit (PMU), we require sampling clock pulses of 1pps through GPS. How will I create this Time synchronization or 1pps in MATLAB??

How will I generate timing pulses in order of 1 microsecond/1pps in MATLAB?

I have 60 ml aqueous phase and 10 ml organic phase for nanoparticles while evaporating organic phase if I evaporate 40 ml of water too at rotary evaporator, is it right?

The small angle x- ray scattering profiles for ripple phase frequently indicate a 01 direction (as found in many literatures) but scattering along this direction is not found in the gel phase phosphatidylcholines, why?

Mixture of metals that are not in single phase, but a mixture of two phases of individual metals themselves are also termed as alloys at many places. This creates confusion regarding definition of alloys. Could anyone please give clarity on this?

For a 12 pulse diode rectifier is it necessary a transformer for a phase shift of 30 degrees. What is the difference between the Y/Y/D and D/Y/D transformers for 12-pulse rectifier?

I want to measure XRD on 1T-MoS2 phase, but sinceit is unstable phase I am wondering whether it will transform into stable 2H-MoS2 phase after measurement.

I am doing the DICTRA simulation for AL12MG17_A12 phase.

But this phase is not available in any of the mobility databases. Can anyone suggest me where I can find the mobility data for this phase, or is it possible to proceed further without it?

Trying to install Heterodyne Interferometry.

Theoretically a signal peak which appears within positive phase in DEPT135 should appear within negative phase in DEPTQ. But mines, both (meaning signals with same chemical shifts) appear in the same phase. Is there any reason why this happens? Is this normal?

My solvent peaks, however appear in the opposite phases. The pulse sequence for DEPTQ used is deptqgpsp.2

What kind of industry or process that use micro-extraction acetone from aqueous to toluene phase? Please give an example of the application of it in that industry.

Thank you for your kindness.

transport intensity equation

phase values

XRD analysis of Ceramic formed shows the presence of TiB2 and TiB phases, how will you distinguish both and how did TiB phases formed along with TiB2

The 2 common winding types of three phase motors are star(Y) and Delta winding. In the catalog of a PMSM the Winding type is expressed as Wdg#1.

why in a traveling wave tube , in chart of phase velocity versus frequency, phase velocity decreases as frequency increases?

Is the phase the same everywhere at the focal plane of a high NA objective? or the phase front is always spherical as it just pass the lens?

Dear all

I would like to know if for two-phase solid-gas flow in dusty regime (dusty regime consider the flow as a single phase flow where particle fellow the flow streams), the pressure drop can be calculated using the correlation of single phase flow or should use the correlations for two phase flow ? any suggestions for the appropriate correlation ? Regards

Hi

Where can I find and download new papers about Phase Shift control method for switching power supplies such as Dual Active Bridge converters?

Best regards.