I broke this piece of pure vanadium by putting it through a rolling machine. The fracture surface consists of many harsh, right angles. It's likely a form of brittle fracture but unlike anything I've ever seen.
What I did (unpublished yet) is extract several (e.g. 16) mask features within Mask R-CNN from multiple images, construct a distance metric to compare them to predict the image class. Each set of...
13 December 2020 9,504 2 View
Generalization of COVID-19 models is a very serious challenge. I'm trying to find a model (ct scans or x-rays) that was trained and evaluated on multiple datasets. It would be particular...
03 December 2020 8,863 4 View
I've only come across models that were trained and evaluated on one of these data. I don't see why it would be a problem to do both, as there are many similar features.
03 December 2020 8,310 3 View
I must measure the oxidation resistance of several cobalt-based super alloys. Since time is short, it might be a good idea to leave them in a tube furnace filled with pure oxygen to accelerate the...
11 April 2019 8,621 1 View
Often times, a pure metal is described as isotropic because the mechanical properties do not vary with direction. However, I recently learned that Young's modulus changes with direction according...
30 January 2019 877 3 View
31 December 2018 6,643 3 View
Currently I am using a 3 wt% concentration of nital to etch quenched 1050 steel. The martensite grains become visible but difficult to see for grain counting. I do not want to use picral due to...
01 February 2018 6,911 1 View
I've been stuck on a homework assignment for a while now. The first problem gave me the XRD pattern of an unknown element, which I successfully identified as Mo. The second problem involved the...
09 October 2017 4,631 5 View
Currently I have a dataset with students from 8 different studies identifying which values (Responsibility, Trust, etc.) they find important. They were allowed to choose up to 5 values from 17. I...
16 January 2017 2,451 5 View
28 July 2014 483 1 View
Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...
02 March 2021 2,431 3 View
Which tools can be used to generate machine codes for additive manufacturing?
02 March 2021 7,220 2 View
Does anyone have the experience of using Taq Man probes in the QIAGEN Rotar- Gene qPCR machine?
01 March 2021 5,311 1 View
I have a sample of treated water sample & asked to obtain ammonia conc. in sample using a machine with 5-25 ppm detection range. However, upon testing with different dilution factors, all...
27 February 2021 8,483 3 View
25 February 2021 1,987 3 View
I need to make an injection molding machine in which short fibers are to be introduced. Short fiber length and material properties are to be determined and also the material strength are to be...
22 February 2021 4,290 1 View
I'm trying to study cracked structures under a compressive load taking into account contact between the crack lips. I would like to know if the method of extrapolation by displacement remains...
21 February 2021 8,694 4 View
I've been working with qPCR for some months now. I amplify 2 genes (PSEN2 and HN1), and the protocols are optimized for both and have been working fine. The other day I amplified HN1 for some...
21 February 2021 3,437 3 View
Dear all, I hope everyone is safe and healthy I do have a question please. Where can I find a drop-weight impact testing machine to test fiber reinforced polymer composite plates (CFRP and GFRP)...
17 February 2021 3,820 3 View
I know that my target is in my sample as I extracted it from cell culture myself. These plots show some amplification. The first one seems O.K for the first 36 cycles but then collapses at the...
14 February 2021 2,809 2 View