What are typical engineering design challenges in cryogenic spacecraft structures?

More Ashish Thakur's questions See All

In PRIMER, is it possible to downweight certain taxa in multivariate community datasets to reflect uncertainty around identification??

I have a dataset with about 80 different species. As usual, some species are very easy to identify with certainty whereas others are more difficult, which means that I am less certain of my...

03 March 2021 8,066 4 View

How to get onecolumn document from standard IEEE ACCESS LateX template?

I have prepared a manuscript in IEEE Latex template, but for some purpose, I need to prepare a word file as well (detailed format is not required). Compared to two column .tex file, one column...

02 March 2021 1,830 3 View

Gel electrophoresis result for total RNA samples, 1.5 Agarose gel was used, How to improve the integrity of RNA?

Gel electrophoresis, RNA degradation, RNA extraction from fresh tissue

02 March 2021 5,433 5 View

How to grow E.coli on the low salt LB agar plate with 50 or 100ug/ml of Blasticidin?

Hello, I would like to ask how to grow E.coli which resists 50 or 100ug/ml of Blasticidin. I have tried many methods by using low salt Luria-Bertain(LB) agar plate. However, no colonies grow. Let...

01 March 2021 2,027 2 View

OpenBCI eeg--has anyone used them?

I'm looking to try out an off-the-shelf EEG set for some exploratory work. Curious if anyone has used the OpenBCI, and how much set-up work is required. I've heard they are more difficult to get...

01 March 2021 4,128 3 View

How to remove DCU and HOBT from my reaction?

I am doing a acid and a chiral amino alcohol reaction using DCC and HOBT in DCM or THF? Can anyone suggest me how to remove DCU and HOBT from a reaction mixture??

28 February 2021 2,153 1 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

How to eliminate Steady state error from Reinforcement learning genetic algorithm code?

The following code (see 1st 2 images attached) is used to produce PID controller values that are designed to control the system (G). The code finds the PID controller values (noted as k) by using...

28 February 2021 6,560 14 View

B-mercaptoethanol (BME) protocol?

Hi everybody, I have been running a multiplex IHC which allow me to stain the same tissue with different markers (Primary Ab + Secondary conjugated Ab) (AF487, AF555, AF647). Since I would like to...

27 February 2021 5,028 2 View

What is the suitable range of Sulfur content and Viscosity of Heavy fluid Oil that used in Kiln?

What is the disadvantages of high sulfur content to the ceramic burning process? and what is the effect of outranged viscosity?

24 February 2021 8,219 2 View

Is there retained austenite in the microstructure of Inconel 718?

I am doing research on Inconel 718 and I need to learn the answer to this question to make certain information. Is there a possibility that retained austenite in the microstructure of Inconel 718...

12 January 2021 670 2 View

ESA Eureca spacecraft Solar Array Arcing demage, What is the cause of the problem?

We see a photos of solar array damage suffered by the ESA Eureca spacecraft that was recovered by the Space Shuttle. photo shows a sustained arc site on its solar arrays. In this case, the...

23 December 2020 2,512 2 View

No title

Hi everybody, We are setting up a new laboratory. We want to examine the immunological response to the presence of different bacterial species. Therefore, we have to store human cell lines and...

26 November 2020 7,940 2 View

How to calculate the dimensions and frequency, etc. of a pulse tube for required cold/hot temperatures?

Require to know the methodology for calculating dimensions (Lenght, diameter), operating frequency, etc. of a simple pulse tube refrigerator. Reference to handbook or manuscript would also be helpful.

29 September 2020 2,191 2 View

Which coordinate (inertial/spacecraft) is best useful for finding the plasma wave signatures in Parker Solar Probe (PSP) data?

The Parker Solar Probe (PSP) data is available in two coordinate systems, i.e., the interplanetary inertial coordinate RTN (Radial-Tangential-Normal) and the Spacecraft coordinate. I want to find...

17 September 2020 8,500 2 View

Would a standard camera lens survive being cooled to 4 K in a cryostat?

I want to place 2 camera lenses (eg Thorlabs MVL12M23 and MVL50M1) inside the inner vacuum can of an Oxford Kelvinox MX250 dilution cryostat. The camera lenses will be thermally connected to the...

18 June 2020 6,056 1 View

How can X Ray Crystallography Facilitate in the understanding the 3D Structure of SARS- CoV-2?

For structural biologists, x-ray crystallography is by far the most commonly used tool for unraveling protein structures. It also produces the highest-resolution images of structures. The process...

22 April 2020 5,261 3 View

What kind of ceramic and metal are proper to make a FGM?

As you know, FGMs usually include metal and ceramic. Also, These materials have been used in high temperature environments. Based on the references, there are few temperature dependent materials...

23 February 2020 6,807 4 View

What material should be preferred for manufacturing best quality heat shield?

Object while returning into atmosphere attends Hypersonic speed and to save what's inside, what material should be used to manufacture heat shield.

01 February 2020 8,649 2 View

Working on cryogenic micromachining and polymer behavior at Tg. Can anyone suggest some book or information source to know deep about this topic ?

1. LATEST RESEARCH TREND ON CRYOGENIC MACHINING 2. POLYMER BEHAVIOR BELOW GLASS TRANSITION TEMPERATURE

23 January 2020 4,482 2 View

Jan Balaz

A nice review is, e.g., here: http://www.issibern.ch/forads/sr-009-37.pdf

Ashish Thakur

Good but they talk about insulation and modifications. Indded it is very good but typical engineering challanges in this paper are there but it could be better that thus paper to illustrate complete challanges, design-tedt-redesign and geometrical and mathematical problems how they are arising during lifting, during existing, during process, during production and during performance too.

Renjish Vijay

https://www.tandfonline.com/doi/abs/10.1080/2374068X.2022.2072085?journalCode=tmpt20