I am preparing a 30h course and need to source out information regarding air monitoring and quality control.
It is well known that low-cycle and high-cycle fatigue cracks initiate from the surface, while ultra-high cycle fatigue cracks initiate from the inside. I am very curious why this transformation...
17 January 2021 9,633 6 View
Recently, I came into contact with a new discipline named chemo-mechanical coupling. I found that chemo-mechanical coupling phenomena exist in many research areas, ranging from development of...
17 December 2020 1,065 3 View
There is a recent publication titled "In vivo DNA assembly using common laboratory bacteria: A re-emerging tool to simplify molecular cloning" (J. Biol. Chem, 2019; doi:...
05 March 2020 153 3 View
We are working on a protein that is predicted to contain a zinc finger (ZnF). Could someone share your experience working with ZnF proteins? Should we add Zn during expression in E. coli? If so,...
23 February 2020 2,125 1 View
ABAQUS ERROR: ONE OF THE ELEMENT IS CLOSE TO PARALLEL WITH ITS BEAM SECTION AXIS, so I'd like to know how to solve this problem? The element property is beam element, so I should define the...
08 August 2019 2,092 2 View
When you create the systematic review paper, do you think it necessary to flesh out the theoretical framework/background section?
31 January 2019 1,106 11 View
In practice, the signal is usually time-varying,like s(t)=Aexp(iw(t)), where A is the amplitude and w(t) is the instantaneous phase. To calculate the Fourier transform of the signal s(t), we can...
08 December 2018 6,218 3 View
Magnetic induced polarization has been reported about HoMn2O5, are there some data about single crystal or polycrystalline ceramic of HoMn2O5?
08 November 2017 6,093 2 View
Most software packages for analyzing polytomous models under the Item Response Theory approach show option characteristic curves as an output. Given that I have the data on those option...
14 October 2017 8,379 10 View
10 August 2016 6,920 4 View
Dear Dr. Cai, my name is Simone Prospero and I work in the team of Phytopathology at the Swiss Federal Institute for Forest Snow and Landscape Research (WSL;...
01 March 2021 1,133 1 View
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
Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...
26 February 2021 4,026 5 View
Has anyone ever tried to deliver CO2 with a CGA 300 regulator? I know that a CGA 320 regulator is standard for CO2. The issue is that I currently do not have any free CGA 320 regulators. I also...
25 February 2021 3,292 3 View
Hi, I am having trouble with a problem, in the field of Optimal Control and the generation of optimal time-series. Let's consider a system, whose dynamics are represented by dx/dt =...
24 February 2021 9,105 2 View
Hi everyone, I'm researching about mobile learning in higher education. Due to the small number of the students in the semesters, I cannot have a experimental and control group together. I'm...
22 February 2021 3,653 11 View
My real system (buck converter) can only take an input of 0 to 1 (duty ratio) and I need to constrain the system so the controller action keeps within this bounds. How can I do this? The code for...
22 February 2021 2,125 3 View
I ran RT-qPCR for a control and a treated group and it appears that my gene of interest was not expressed at all in any of the subjects in the control group. So I was wondering if I could...
20 February 2021 6,243 10 View
Hi, I have modelled a three-span arch bridge with soil fill over along with pedestals. The FE modelling is done in LUSAS with HX8M solid elements (i.e. 3D solid modelling). The non-linearity is...
20 February 2021 1,346 2 View
I am doing a project on classification of EEG signals of Alzheimer's disease and control groups. Previously, I extracted the alpha power of the EEG signals and found out the strengths. I want a...
18 February 2021 8,502 2 View