Newtons force mathematical definition hides a hidden physical problem?

More Manfred Geilhaupt's questions See All

What is the maximum Si content in Al-Si alloys and the parting limit during dealloying/chemical leaching?

We recently 3D printed (SLM) hypereutectic (high Si)% Al-Si-alloys and chemically removed the Al afterwards (via HCl (aq)) in order do get a porous structure, which worked quite well. 1.) I was...

16 October 2023 1,716 1 View

Does hematuria in 80years old men is caused by lower urinary tract or upper urinary tract?

a patient has a cyst 10cm size in the kidney and is suffering from bleeding after 30 km bycicle rides? could this be due to the K.cyst rather than prositate or bladder ?

22 September 2023 1,890 0 View

How do rubber-like materials fail in montone compression?

Rubber and rubber-like elastomers fail in a brittle manner. Therefore, I have some idea how the defect free bulk material fails. I have seen such failures in tension. But I have never seen any...

26 May 2022 2,046 2 View

How can I add research published in a series?

I have recently published a paper in "Fundberichte aus Baden-Württemberg" a regional publication of the state office of antiquities and monuments of Baden-Württemberg. This is a series forthcoming...

18 April 2022 4,635 2 View

Why is the strain intensity factor not used in the same way as the stress intensity factor in LEFM?

In linear elastic fracture mechanics (LEFM), only the stress intensity factor seems to be used. LEFM implies the same r−1/2 singularities of stress and strain at the crack tip. Very few articles...

03 September 2021 9,296 4 View

When is a beam a plate and when is a membrane/bar thick?

Wide beam, or when is the beam a plate? The bending stiffness of a beam with rectangular cross-section (h x b) is D=Eh3b/12 with E=Young's modulus. If the width b is large, the beam deflects like...

01 July 2021 9,542 0 View

Can strain based failure theories for brittle materials replace stress based theories?

Engineers are trained to think of stress limits and effective stress in strength of materials. Do you know strain limits and theories for effective strain? The idea to ask for strain limits came...

13 January 2020 436 1 View

Generalization of Kirsch's problem to finite plate?

Kirsch's celebrated 1898 problem gives the stress in points A and B at a circular hole in the infinite plate. For the finite plate a formula for the stress in point A is given in books. I am...

03 January 2020 9,155 0 View

How do I design primer set for single mutation?

I have coordinates for my genes of interest and I want to design primer set to identify single mutation. I got the DNA sequences using UCSC browser and designed my primers using Primer3, however,...

15 December 2019 9,786 3 View

Where can I find a guide to objectively evaluate teaching quality?

I wish to get away from opinion polls and vague expressions such as good or poor. I am looking for a precise job evaluation, preferably using numbers. With this I could than compare one teacher to...

16 May 2017 4,559 3 View

What is the difference between mathematical R^4 space and physical 4D unit space?

We assume that the difference is huge and that it is not possible to compare the two spaces. The R^4 mathematical space considers time as an external controller and the space itself is immobile in...

10 August 2024 6,678 14 View

How to load and plot 2D-PIV (particle image velocimetry) recorded velocity vector field in Techplot?

Dear Researchers I need to know, how to load and plot 2D-PIV (particle image velocimetry) recorded velocity vector field data in Tecplot? Thank You

02 August 2024 3,615 1 View

Transfection in HEK293T cells?

Dear All, I am trying to transfect a pCDNA3.1 vector containing my gene of interest. The purpose is to figure out the localization of the protein of interest. I have fused the protein with GFP on...

31 July 2024 9,892 4 View

All math can be explained by iterator of code?

all math can be traversed by code? all math can be translate to code?

26 July 2024 9,530 0 View

Can we eliminate the stress singularity at the tip of the crack by manipulating the elastic constants?

The aim of the research here is to prevent the propagation of the crack in the fabricated elastic medium with useful applications.

25 July 2024 9,976 3 View

How can I extract the mathematical equation from existing Neural Network Model?

There exists a neural network model designed to predict a specific output, detailed in a published article. The model comprises 14 inputs, each normalized with minimum and maximum parameters...

14 July 2024 2,714 3 View

Does anyone know, any conference related to "mathematical data compression" topic?

Please suggest me, I want to present my research work.

13 July 2024 1,461 1 View

I need help with cloning a 200 bp insert and a 4,7 Kb pEGFP-N1 vector. How can I do it?

I've been trying to clone my N-terminal inserts in the comercial pEGFP-N1 vector. Initially, I cloned my N-terminal insert into a pGEMT-easy vector to ensure that the insert digestion was done...

09 July 2024 4,277 1 View

How i can calculate mathematically COD concentration if i add 1gr from glucose to 1 L distilled water ?

how i can calculate mathematically COD concentration if i add 1gr from glucose to 1 L distilled water

08 July 2024 9,104 2 View

Interested in Postdoc position in Mathematics at IMI-BAS BG?

Computational topology of solitons The well-established research area of algebraic topology currently goes interdisciplinary with computer science in many directions. The Topological Data Analysis...

08 July 2024 2,816 0 View