Level 1 pre-post multilevel regression: Panel data or ANOVA approach?

Dear colleagues, I am currently teaching myself in multilevel analysis using educational data. I found few to zero literature on basic analysis methods. In my context we frequently use level-1...

17 February 2021 9,378 5 View

Reliable and Valid Instrument for Causes of Medical Errors?

Is there any questionnaire/survey that measures the causes of medical errors? Example: physician negligence vs. systemic issues. Looking for a reliable and validated instrument. Thank you!

15 February 2021 2,874 4 View

Should the AUC in a concentration-time graph of a subcutaneous implant be roughly the same for poeple?

I have 2 concentration time curves of a subcut drug implant. the first group has a peak around the 50 day mark where as the second group does not. Both groups received the same implant by the same...

10 February 2021 2,305 3 View

Software for flow cytometry-like gating of data sets?

I am currently trying to do image based cytometry from fluorescence microscopy images. From the images I extract data such as cell size and a number of fluorescence intensities. Is there any...

09 February 2021 6,278 1 View

Can A. thaliana splice algae genes?

24 January 2021 329 2 View

Why calcium oxide nanoparticles becomes black at 650 degree temp?

Please tell me, which temp can I select for neglect black color of the Calcium oxide nanoparticles ..

14 January 2021 5,341 5 View

Does long term preservation (10years) of Collembola in 99% Ethanol affect recovery rate of extraction by flotation?

Hello! I am currently developing an automated counting approach using Fiji to count Collembola from pitfall trapped samples that have been stored in Ethanol (99%) since 2010. I use flotation (tap...

13 January 2021 659 2 View

Co-stain Lectin PNA FITC conjugate with an uncojugated primary antibody?

Hello, I am planning to stain retinal tissue sections for IHC and want to co-stain cones and rods. For this we plan on using a Lectin PNA From Arachis hypogaea (peanut), FITC Conjugate for cones...

12 January 2021 583 1 View

How to use Abaqus USDFLD subroutine to vary stiffness?

Hi I have a problem where I am trying to vary the stiffness spatially across a structured interface. The whole idea is to vary the stiffness vertically, with a bulk stiffness of 8GPa decreasing...

06 January 2021 262 3 View

Abaqus static analysis - Applied tensile axial force on B21 cantiliver beam does not balance reaction. Can you please advise on resolving this?

I have modeled a cantilever beam in Abaqus to test metal plasticity option. The beam is cantilever, 10 m long, and discretized into 10 B21 elements with 1m x 1m cross section. The beam material is...

01 January 2021 696 0 View

ASTM or ISO standard test for duplex coatings?

Dear all, I would like to conduct scratch and linear reciprocating tribo-test on my magensium alloy, which has a plasma electrolytic oxide (PEO) layer of about 20 um and 10 - 20 um of Parylene...

25 January 2021 9,709 2 View

ISO antibody against BFP for FFPE IHC?

Suggestions and recommendations welcome. Any usage/protocol experience would also be helpful/appreciated. Cheers

22 December 2020 599 3 View

How to get dry petri dishes in glass after wet sterilization?

Hi, I warping my plates with paper, later put them in the autoclave (use wet sterilization cycle) but still some plates are get wet after ends the cycle. How to get dry the petri dishes? and if...

13 December 2020 8,062 4 View

No title

I am a PhD student, and the doctor asked to do a lecture on ISO 9000, 14000, 17000, 118000,22000 18091,27000 and I would like to prepare the lecture. Is it possible to help me with these...

15 November 2020 8,068 3 View

What for is saturrated sodium chloride solution in ISO 12966-2 ?

Hi, everyone. Our lab is going to use ISO 12966-2 and 12966-4 and there is one moment in sample preparation (rapid transmethylation method under alkali-catalysed conditions) that I can't...

15 September 2020 3,229 4 View

The ISO 14040 series standards, Life Cycle Assessment, Is it important?

What do you think about the importance and value-add of The ISO 14040 series standards, Life Cycle Assessment? In general and especially in petrochemical industry.

04 June 2020 3,580 10 View

Relationship between STEP AP209 and CGNS?

Could you please share your knowledge/experience about the relationship between STEP AP209 (ISO 10303: AP209) and CGNS: - Does AP209 covers/supports CGNS 100%? - Where can I read more about the...

22 March 2020 6,625 4 View

Hi, I want to know a standard method for determining the antimicrobial activity of thin films or coatings?

I want to know the standard procedure. For example, ISO 22196 is one of the standard guideline to test the antimicrobial activity of coatings, but it's on purchase document. Does any one know...

01 February 2020 9,425 4 View

How can any lab compare the results of Inter Lab Comparison in context of Quality Assurance (ISO 17025), if the test result is qualitative in nature?

For example, if lab conduct test like full shoe flex based on SATRA TM 92 which results in Qualitative comments (Sole Crack, upper damage etc.)

31 December 2019 6,628 3 View

How to combine Software Asset Management and Blockchain (scientific studies) ?

Hello Scientists, I am currently writing my thesis in German about Software Asset Management (SAM) and trying to integrate the trend topic "Blockchain" as a UseCase. So far I have only found one...

10 November 2019 964 3 View