Photoionisation cross section of (singly) excited Helium?

Hello, I am searching the photoionisation cross section of (singly) excited Helium (1s2s as well as 1s3s). I only find either neutral Helium or doubly excited Helium. If someone could provide...

17 November 2020 7,096 3 View

If the daily (hourly) concentration of PM2.5 is not Gaussian. Is correct apply an arithmetic mean in epidemiological studies for risk assessment?

The distribution of daily PM2.5 concentration (hourly) is bimodal in the city of Coyhaique (South of Chile). Coyhaique is the city more polluted by particulate matter accord the WHO. The major...

11 October 2020 2,006 3 View

Residual stresses of heat-soaked hot bent glass - are they different from flat glass?

Usually, during the structural design of flat glass, one does not need to take into account the effects of changes from residual stresses. Question: How to understand and predict the residual...

15 March 2020 681 5 View

Structural steel design - Effective length of a fillet weld according to EN 1993-1-8, 4.5.1 (1) unclear in definition?

In contrast to the older German steel code DIN 18800-1, the Eurocode for steel design defines an effective length of a fillet weld as follows (no sketch is provided in the Eurocode): "The...

12 December 2019 592 5 View

How is the deflection of aluminum frame structures influenced by the stiffness of corner cleats and the fitting tolerance?

How is the deflection of aluminum frame structures influenced by the stiffness of corner cleats and the fitting tolerance? Explanation: An ( orthogonal ) corner where two (extruded) aluminum...

05 June 2019 2,194 5 View

Raman spectra of Melanoidins ?

Hi there, we failed to measure Raman spectra of dark products of the Maillard reaction for several times. In fact fluorescence seems to be a problem even when working with 1064 nm. In addition...

05 June 2018 4,890 7 View

Are there proofs that interest in sustainability is correlated with research based learning ?

Actually we have a lot of discussions how research based learning pushes the interest in sustainability. In our project laboratory of chemistry it seems as if the students are activated to get...

05 June 2018 1,430 6 View

Outcome and competence level achieved by digital teaching ?

Hi, actually we have a strong discussion going on, if learning outcomes and competence levels rise when applying digital elements in the classroom. It seems that any approach is biased because...

05 June 2018 3,734 3 View

PCA (Principal Component Analysis) and its application in identification and analytics with IR spectroscopy ?

We measured a series of spectra of individual compounds and got a good separability with PCA Analysis. The questions risig are as follows: What happens if we ad mictures of the individual...

05 June 2018 5,627 3 View

Are there proofs that interest in sustainability is correlated with research based learning ?

Actually we have a lot of discussions how research based learning pushes the interest in sustainability. In our project laboratory of chemistry it seems as if the students are activated to get...

02 June 2018 908 5 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

What are the most reliable approaches to extract key continuous frames from a video, with complete automation?

I have an input video, of skin (from a microscope that means it is magnified such that blood capillaries are visible). The idea is to extract 15 sec of continuous frames from a video of 1 min,...

02 March 2021 2,735 2 View

What are the application of Fixed points thoery in Chemistry.?

It is said that fixed point theory has lot of applications not in the field of mathematics only but also in various areas. So I am looking for applications in Chemistry only..

26 February 2021 3,533 1 View

Can I ask did any good platform or journals for learning the calcluation on the reference governors and command governor?

Recently I face some problems with the mathematical ( calculation) on the reference governor and command governor, so I need some help from you all to get which platform or journal can let me...

23 February 2021 7,746 2 View

What is the standard protocol in doing replicates for C. elegans lifespan assay on solid media (thru worm picking)?

I would like to know what is the standard protocol in the number of worms per plate and number of plates per concentration of extract X in a lifespan assay done in solid media and not automated...

23 February 2021 9,933 1 View

Special issue on PLS-SEM in Mathematics. Are you interested?

21 February 2021 5,601 3 View

What is the better software for approximation of 3D surface with equations?

I have a massive of x, y, z coordinates of 2D surface in 3D space, which builded in Ansys HFSS or AutoCAD. How can I get the analitical aproximation of this surface by formulas?

21 February 2021 3,444 7 View

How to validate image labeling quality within dataset?

Hello, it is about creating a dataset for semantic segmentation with three classes. The problem is that one class dominates with >90% and one class is

18 February 2021 4,254 5 View

How can I obtain a sine function along a path with known equation?

I have a symmetric airfoil with known equation. Now a sine function passes along the airfoil equation like following figure. I want to find the sine function in (x,y) coordinate system.

17 February 2021 1,594 12 View

Does learning mathematics exclusively improve cognitive abilities?

Teaching Mathematics at school to all students is commonly justified by the opinion that it improves their problem-solving skills and "makes them smarter" (whichever measure is implied by this). I...

15 February 2021 7,391 7 View