As underlying fields are physical entities, in what sense are the geometry and metric "physical" too?

06 June 2015 0 1K Report

If this is one way of saying that (Minkowski) space-time is real ("physical") and supporting a real energy tensor, then I'm with you.

Article Gauge Freedom and Relativity: A Unified Treatment of Electro...

Badges
Science topic

Similar topics
Physics

1. If I can quantize the atom using this hyperbolic spiral and classical physics, could nature do the same?

If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...

07 August 2024 5,343 2 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

Are there any instruments for studying time similar to the way it is in space?

There are a huge number of methods for studying objects in space, according to the senses (and not only). Mechanical, thermal, optical, acoustic, electrical, magnetic, based on particle beams,...

06 August 2024 7,102 0 View

Why does the MFDFA algorithm need to calculate the profile of the time series?

As described in the Multifractal detrended fluctuation analysis (MFDFA) algorithm, it at first calculates the profile of the time series, and then other steps are operated on the profile....

05 August 2024 9,366 2 View

How can i do multivariate Time Series forecast using MLP, ANFIS and LSTM?

I need the python code to forecast what crop production will be in the next decade considering climate and crop production variables as seen in the attached.csv file.

05 August 2024 2,977 3 View

Is there any machine to do real time pcr?

I want to know how do you make real time pcr solation ? is there any machine to make it? thanks for answering

05 August 2024 1,660 0 View

Need help with my research project on open source SIEM and machine learning?

Hello everyone, I am currently working on a research project that aims to integrate machine learning techniques into an open source SIEM tool to automate the creation of security use cases from...

04 August 2024 3,196 2 View

What do you consider to be the most relevant elements of EEG for studying cognitive biases?

I've seen articles that primarily focus on alpha and beta activity in the frontal regions, but these studies often compare healthy subjects with those having various pathologies. I haven't seen a...

31 July 2024 7,259 1 View

Is space-time dilation conceptually equivalent to space-time expansion?

Relativistic space-time is described as a four-dimensional continuum comprising three dimensions of space and one dimension of time. In this framework, space and time are interwoven, forming an...

29 July 2024 5,365 2 View

How to Import Blade geometry from CAD file in ANSYS design modeler?

Hello. I have the geometry of a blade in CAD file (stp) and I want to prepare the blade for meshing with turboGrid. I must import this file into designModeler and then transfer to the...

27 July 2024 356 3 View