What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

Has anyone succeeded in capturing uranium atoms in a fullerene structure?

Additional questions are: What are the encapsulating atoms? How difficult was the process and what rates were achieved? What factors most seriously affect the economics?

20 February 2021 3,134 5 View

How to phrase semi-structured interview questions using IPA without biasing superordinate themes?

Hello, I am preparing a semi-structured interview schedule for an interpretative phenomenological analysis study on marginalized individuals' career experiences as impacted by COVID-19. The aim...

19 February 2021 9,099 2 View

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19 January 2021 6,848 4 View

Why do my fibroblasts under hypoxia conditions proliferate slower than the same fibroblasts under normoxic conditions?

I am using healthy control lung fibroblasts in a 96 hour experiment with two drugs (nintedanib and Pirfenidone) and vehicle controls for both. I have both hypoxia (approx 1% O2) and normoxia...

12 January 2021 6,260 1 View

How much does radiative heat transfer effect thermal conductivity of materials and how to compare calculations to experirment?

I am calculating the phonon contribution to thermal conductivity for 4 perovskites (BaZrO3, BaSnO3, BaHfO3, and KTaO3) with relatively wide bandgap. When I compare my results for BaZrO3 to the...

27 December 2020 3,232 3 View

Proper method for assessing model invariance following Confirmatory Factor Analysis (CFA) and preceding 2x2 between-subject analysis?

I have produced a good-fitting, reliable baseline model according to CFA. The model contains several factors each loaded by several categorical (ordinal) items. I ultimately intend to analyze the...

15 December 2020 1,668 4 View

How to Reinstall Operating System for a TA Instruments 2910 DSC?

Hard drive crashed on an old windows 2000 that was used to control a TA Instruments 2910 DSC. Installed new hard drive and I am trying to figure out where I can find the software/operating system...

17 November 2020 2,467 3 View

Communities based websites do they serve a purpose?

I'm asking and posing this question as it forms a part of my final project year. I building an ASP.net community-based website coupled with an Oracle database and I'm looking for feedback,...

17 November 2020 7,852 1 View

How can I solve Error: "The coupling service failed to start" during simulation ANSYS 2Way FSI?

Hello, I am dealing with error during lounching 2 Way FSI in ANSYS Workbench. Setup of the Fluent is ok (stand alone I am receiving expected results) and FEM uses Transient Structural. Once I run...

11 November 2020 3,816 4 View

Can you tell the pros and cons of the proposed active AC coupling circuit?

Are there analog circuit designers? Here is a small task for you. The active circuit below aims to improve the AC coupling in the biosignal amplifiers. Is that so? Are there any pros? I'm...

17 January 2021 3,548 14 View

What kind of possible device mismatch we can expect while designing circuits with Current Mode Analog Building Blocks?How these mismatches affect THD?

Large values of resistors and capacitors are hard to match in the fabrication phase. It will create some systematic mismatches. So how to avoid those kinds of mismatches in case of current-mode...

19 November 2020 3,709 8 View

Is it possible and practical to build an electronic box with this transfer function?

PID controller is reportedly widely built and used in control systems engineering for industrial applications. The PID-controller has a transfer function as: (Kd*s^2+Kp*s+Ki)/s. Therefore, it...

08 November 2020 7,771 10 View

From your experience - what are the biggest impediments in the implementation of Digital Twins?

Even almost 20 years after the first Digital Twin (DT) concept was presented by NASA, there is still no broad implementation of DTs in industry is known to date. Why is that? What is hindering...

29 October 2020 1,003 7 View

Heat flux and heat losses on a thermal conductivity measuring device?

Hello, I am currently working on the design of a device that measures thermal conductivity of sediments and I am not sure if i estimated heat losses and heat flux in the correct way. The device is...

23 September 2020 8,119 6 View

Does the quantum vacuum have analogies in mathematics?

Take, for example, such a concept as a minimum flow, that is, a gradient vector field, the level surfaces of which are the minimum surfaces. Then the globally minimal flow, evolving to an...

13 September 2020 8,593 13 View

USB based DAQ options with atleast 4 analog output channels and 8 analog input channels other than National Instruments?

National Instruments provides vast variety of DAQ options which are based on LabVIEW, however they are way too expensive when it comes to opting option with high analog output channels (like 4)....

30 August 2020 5,195 6 View

Which methods are use for the extraction and isolation of 4-thiazolidinones and thiazole derivatives from natural resources?

Suggest methods used for extraction of thiazole analog derivatives from marine, plant, animals, and microbes.

29 August 2020 5,428 3 View

Is the output of a digital-to-analog converter (4-20 mA) dependent on the shape of the input wave, or just the frequency?

I have a turbine flowmeter giving a frequency output (-5 : 5 V) with a wave shape as in the figure attached. This signal is fed to a Digital-to-analog converter to give a 4-20 mA signal to feed to...

30 July 2020 5,869 6 View

How can the quantum resonance degradation process be used indefinitely to disinfect the environment and anti-pandemic COVID-19 ?

In the name of God I would like to thank the doctors, nurses, medical staff and those who are with the people during these difficult days. Anti-Pandemic COVID-19 : How can the quantum resonance...

26 May 2020 8,370 2 View