Is there an open source free software for text mining and sentiment analysis?

I am looking for a free software for text mining and sentiment analysis for my research on customer review mining (it involves calculating polarity of attributes,opinion oriented information...

25 February 2021 1,920 6 View

Why dielectric anomaly on the dielectric constant curves tend to disappear for a particular Mn doping content?

Why dielectric anomaly peak related to the defect dipoles present in the paraelectric region (around 450 K) of temperature dependent dielectric constant curve tends to disappear? The dielectric...

25 November 2020 209 2 View

Can protons, ions and neutrons be used for SEM imaging rather than electron beam?

Generally it is known that SEM is based on the principle of interaction of electron beam with matter. Proton and ion beam can be used instead of electron beam? How their interaction will be...

27 September 2020 4,432 9 View

India's New Education Policy ( NEP- 2020) has scrapped the M.Phil. Degree. Do you think the fresh Masters students can go for Ph.D. directly ?

India's New Education Policy ( NEP- 2020) has scrapped the M.Phil. Degree. Do you think the fresh Master's students can go for Ph.D. directly? Many scholars have gradually entered into Ph.D. by...

31 July 2020 7,863 13 View

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28 April 2020 8,048 3 View

How can we decide the frequency range for approximation to be used for a Fractional order PID controller used in a power electronic converter?

Hi, I am not clear as to how to decide the frequency range required for the approximation of a FOPID controller used to control a power electronic converter. Can anyone suggest some papers which...

27 March 2020 1,454 2 View

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21 March 2020 2,530 3 View

SEM micrograph of doped Barium Titanate ceramics had certain white spots on the grains? What can be the possible reason for such white spots?

SEM micrograph of doped Barium Titanate ceramics had certain white spots on the grains? What can be the possible reason for such white spots?

18 March 2020 3,275 4 View

How to find quantum yield of a fluorescent material?

How to find quantum yield of a fluorescent material?

17 March 2020 7,471 2 View

What is the meaning of bending moment in entire bridge section in SAP2000 when box girder bridge is analysed?

I did analysis of box girder bridge in SAP2000, it is giving bending moment in entire bridge section. I want to know where it is giving moments for entire bridge section.

10 September 2019 2,991 3 View

How two melting peaks in DSC of polypropylene can be merged into one crystallization peak?

The figure shows DSC cooling (blue) and 2nd heating (green) curves (step: 10 K/min) for a commercial sample supplied as Atactic Polypropylene (APP). The heating curve illustrates two major...

03 March 2021 5,857 3 View

What are the countries most affected by extreme rainfall as a result of climate change?

Increased heat, drought and insect outbreaks, all associated to climate change, have increased wildfires. Decreasing water supplies, declined agricultural yields, health impacts in cities owing to...

01 March 2021 7,168 9 View

Issues with Permeabilization during Flow Cytometry?

Hello Everyone. Currently I am working to characterize macrophages in the myocardium after ischemia-reperfusion injury in rats. Due to the low total cell number isolated from rat hearts I can...

01 March 2021 3,867 3 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

What do I do with DLS peaks that are from the buffer?

I'm looking at the aggregation of my protein sample using DLS. Unfortunately, my buffer (20mM HEPES) also results in a set of peaks. These are at approximately 1 and 1000 d.nm. The lowest peak...

01 March 2021 9,015 2 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View

Exit velocity of natural gas from pressurized tank?

Hi Guys. I'm a mechanical engineer and have a bit trouble, would be very glad if you could help me with my questions. I have a pressurized tank which contains Natural Gas at 200 Bar and 293...

26 February 2021 6,253 3 View