Add a news item about Gelson's first PhD paper

news/micromag-euler-dipole.md

@@ -0,0 +1,97 @@
+---
+title: "New paper proposing a new cost-effective way to automatically analyze magnetic microscopy images"
+date: 2024-08-07
+---
+
+{% import "macros.html" as macros %}
+
+After over 1 year in review (😮‍💨), we have a new open-access paper by
+lab member [Gelson F. Souza Junior](../team#Souza-junior), the first of his PhD
+🎉 :
+
+> Souza‐Junior, G. F., Uieda, L., Trindade, R. I. F., Carmo, J., & Fu, R.
+> (2024). Full vector inversion of magnetic microscopy images using Euler
+> deconvolution as prior information. Geochemistry, Geophysics, Geosystems, 25,
+> e2023GC011082. doi:[10.1029/2023GC011082](https://doi.org/10.1029/2023GC011082)
+
+## About
+
+In short, very small magnetic particles in rocks and other materials can store
+information about what the Earth’s magnetic field was like in the past.
+But not all particles are good recorders of this magnetic information, and some
+may have recorded different overlapping directions and strengths.
+So it is important to measure each particle separately in order to identify and
+separate the good recorders from the bad ones.
+A device called a "quantum diamond microscope" is able to measure the
+magnetic field near the surface of a rock sample at microscopic scale.
+We propose a new method for processing data from this microscope that is able
+to find out the individual magnetizations of large amounts of small magnetic
+particles automatically.
+We created a computer program to execute the method, which calculates the 3D
+position and magnetization of each particle using the simple model of a
+magnetic dipole.
+We tested the method on simulated data, using fake magnetic particles for which
+we know the correct magnetization and position, and real data, both of which
+showed good results in most cases.
+The method we created has the potential to enable the widespread study of the
+magnetism of natural materials with more detail than before.
+
+Here is an example of what the data and results we can obtain from it look
+like:
+
+{{ macros.figure(src="../images/news/micromag-euler-dipole-paper-figure.jpg", alt="Two figures side by side. On the right, a stereogram with dots showing estimated dipole moment directions with some dots concentrate in upper part, a few scattered points, and most dots concentrated in the bottom. On the left, a gray-scale map with some dipolar signals overlaid by colored vectors of various sizes, most pointing up or down.", caption="Results of applying the method we propose in the paper to a <a href='https://doi.org/10.6084/M9.FIGSHARE.22965200.V1'>real magnetic microscopy image of a speleothem sample</a>. The sample contains magnetite and hematite and was magnetized first with strong field in the +y direction and then with a weak field in the -y direction. This results is magnetites aligned with -y and hematites aligned with +y. Our estimated directions fit this expectation and allow us to map the occurrence of both minerals in the same. Modified from a figure in the paper.") }}
+
+The main advantage of the method we came up with is that it can yield results
+for even small magnetic particles requiring only the data itself and a few
+seconds of processing times.
+Other techniques available usually required either manual picking of the
+signals in the images or expensive and time-consuming tomography data.
+
+## Open science
+
+All of our results and the figures in the paper can be reproduced with the
+material in the GitHub repository
+[compgeolab/micromag-euler-dipole](https://github.com/compgeolab/micromag-euler-dipole).
+It contains a [`REPRODUCING.md`](https://github.com/compgeolab/micromag-euler-dipole/blob/main/REPRODUCING.md)
+file with instructions for setting up your computing environment and running
+the code.
+The repository is also [archived on figshare](https://doi.org/10.6084/m9.figshare.22672978)
+for long term availability and to provide a citation point.
+
+The method is being implemented by MSc student
+[Yago Moreira Castro](../team#YagoMCastro) into the open-source software project
+[Magali](https://github.com/fatiando/magali), which is a part of
+[Fatiando a Terra](https://www.fatiando.org/).
+Yago is also working with Gelson to make improvements to the method and
+implementing other quality-of-life features, such as plotting support and
+statistics of vectors and directions.
+
+![Magali logo (a watermelon cut in half with dipoles as seeds)](https://raw.githubusercontent.com/fatiando/magali/5e260e734ebf6b7e73af681c86d4589b9a2ed10b/doc/_static/readme-banner.png)
+
+## History
+
+The idea for this paper came from a chat I had with
+[Prof. Ricardo Trindade](../team#ricardo) at AGU 2019, where he presented the
+problem and I realised it was very similar to
+things I had worked on before
+in the [PINGA lab](https://www.pinga-lab.org)
+([Melo et al. (2013)](https://doi.org/10.1190/geo2012-0515.1)
+and [Oliveira Jr. et al. (2015)](https://doi.org/10.5194/npg-22-215-2015)).
+We started planning a collaboration to combine the CompGeoLab's expertise in applied
+geophysics and [USPMag](https://paleomagnetismo.iag.usp.br)'s long track record
+in paleomagnetism.
+
+The manuscript was originally published [as a preprint n June 2023]({{
+macros.pretty_relative_link(site["news/preprint-micromag-euler-dipole"], page)
+}}) and took much to long in the peer-review process.
+But we're very happy that it's finally out because Gelson is already
+[working on many improvements to the method]({{
+macros.pretty_relative_link(site["news/castlemeeting2024"], page)
+}})!
+
+Leo
+
+> This research is being developed under our [Royal Society grant](rsoc-mag-microscopy-2022.html) and Gelson's PhD, which is funded by [FAPESP](https://fapesp.br/).
+
+> The plain language description of the paper was originally published in the
+> paper and preprint, both licensed CC-BY.

team/index.md

@@ -15,9 +15,14 @@ geoscience and open-source.
 {%- macro profiles(people) %}
 {# Function for generating the profiles of a list of people #}
 {%- for person in people %}
+  {%- if person.id is defined %}
+    {%- set id=person.id %}
+  {%- else %}
+    {%- set id=person.github %}
+  {%- endif %}
   <div class="profile">
     <div class="profile-info flow">
-      <h3 id="{{ person.github }}">
+      <h3 id="{{ id }}">
         {{ person.name }}
         {%- if person.pronouns is defined %}
           <span class="font-normal">({{ person.pronouns }})</span>

team/people.yml

@@ -93,6 +93,7 @@ collaborators:
     picture: ../images/team/valeria-barbosa.jpg
 
   - name: Ricardo I. F. Trindade
+    id: ricardo
     role: Professor
     affiliation: Universidade de São Paulo, Brazil
     pronouns: he/him