Is there an alternative, more ecological solvent for shape memory polyurethane other than N, N-dimethylformamide (DMF) ?

As DMF creates problems for environmental aspects, we are looking for an alternative solvent for potential commercial end use applications of SMPU.

25 November 2020 8,728 3 View

How can you calculate the correlation of the independent variables in SPSS if the data is panel data?

I am not sure if I can just calculate my correlation with the Pearson test for example if I have panel data. Or if there is anything I have to take into consideration, when calculating it in SPSS.

26 April 2019 8,558 3 View

It is possible to solve the viscous sub-layer with ANSYS-CFX for sub-cooled boiling flow?

Hello I am solving sub-cooled boiling flow with CFX. I do not want to use single phase wall function. I want to solve the viscous sub-layer. Is it possible? If so which turbulence model is...

12 February 2019 3,685 3 View

What could be reason that as I increase the mesh, mesh dependency is increasing up to a point and after that point it is decreasing?

I am simulating (CFX) a pipe with a turbulence promoter in it. I am using RNG k-e turbulence model yplus is lower than 1. For mesh independency analysis I am using turbulence kinetic energy as a...

29 January 2019 6,801 8 View

What should I pay attention to mesh when I simulate boiling flow?

I am simulating boiling flow with CFX. I want to make mesh sensivitiy study. The problem is that for coarse mesh the solution is converginig. As I do finer mesh I am getting trouble. It is not...

28 November 2018 3,923 8 View

How can I save multiple planes as pictures along the flow domain?

Hello Everyone I am calculating average void fraction for 100 cross sections along the flow direction with "play session". But I want to create and save these 100 cross sections as images. Can I...

04 September 2018 7,016 5 View

Generic inverse variance method leads to different OR and CI values than the original (extracted) ones?

13 October 2016 3,966 18 View

What is time dynamics of relic (CMB) radiation temperature accounting for dark energy?

I've asked this question once; want to be more specific now; hope will be luckier this time around. According to the original Gamov-Alpher-Hermann theory, the CMB temperature goes down with time...

24 February 2015 9,540 7 View

Any advice on graphene growth on Nickel and transferring onto glass substrate?

09 January 2015 298 4 View

Could a dirty quartz tube effect on cvd growth graphene?

I've been working on CVD growth graphene for two years. I growth graphene on copper substrate. I didn't have any problem about producing graphene until nowadays but I've some problem about growth...

23 December 2014 8,281 5 View

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

03 March 2021 8,272 1 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

What is the most reliable source to get Impact factor of journals?

Source to get Impact factor of journals

01 March 2021 6,654 2 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

Which index or sites are reliable in determining of plant species?

There are many indexes when determining plant species: Plants of the World Online (POWO), International Plants Names Index (www.ipni.org), The Plant List (www.theplantlist.org) and others. But...

26 February 2021 3,404 10 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

How can I verify my centrifugal fan design for electric motor cooling?

I have radial blade centrifugal fan design which will be mounted on exhaust side of electric traction motor. The fan will be mounted on same motor shaft inside the housing. How can I verify that...

23 February 2021 2,390 3 View

How do historians determine the credibility sources in modern history?

For a source to be considered reliable it must contain accurate historical information. But how does one determine the accuracy and reliability of sources in modern and recent history since not...

23 February 2021 1,346 13 View