MathJax Tips

Over at John Cook’s TeX Tips there’s a pointer to a very nice MathJax
basic tutorial and quick reference
. It’s especially handy for those
who don’t use \(\mathrm{\LaTeX}\) all the time but occasionally want to
include a bit of mathematics in a blog post. It by no means covers
everything but there’s enough there to probably get you through adding
a quick formula or two to a post.

The very first tip is something that I didn’t know. When you’re
looking at a Web site with some MathJax generated mathematics can you
can see the \(\mathrm{\LaTeX}\) source by right clicking on the formula
and choosing Show Math AsTeX Commands. That will open another
tab with the \(\mathrm{\LaTeX}\) source.

The cheat sheet is definitely worth bookmarking if you’re not a
\(\mathrm{\LaTeX}\) expert but sometimes want to include some
mathematics in a post.

Postscript: After writing this, I came across this macOS application
that lets you take a screenshot of an equation and output the LaTeX
source
. If the tip about right clicking on a MathJax-displayed
equation to display the \(\mathrm{\LaTeX}\) appeals to you, you should
check out Mathpix.

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Ten Tools for Academics

Over at Academia Obscura they have a list of 10 essential tools for
academics and PhD students
. It’s a useful list but my immediate
reaction upon reading it was that you can do all that with Emacs.
Well, you can’t backup your data with Emacs but other than that you
can forget about all those tools and just use Emacs.

Here’s a list of those tools and how Emacs (and Org mode) can do the
same things and often, in my opinion, better:

Citation Manager
Use John Kitchen’s org-ref. Here’s a video that
shows it in action as well as demonstrating using Org mode to
write a paper.
Scrivener
Org mode can export to almost any format and is
infinitely configurable to work your way;
Evernote
Org mode can store and index content seamlessly. You can
attach data to an Org entry including PDFs or links to
HTML. You can even download your Evernote content to Org;
Trello
This is what Org mode was made for. TODO lists and agendas
that can accumulate tasks from multiple lists. John
Goerzen explains why he gave up other tools for this in
favor of Org mode
. If you can’t give up Trello—because of
collaboration, say—org-trello lets you interface it and
Org mode. And, it’s all local. If you’re offline, it’s
still available;
Unroll.me
Elfeed delivers all your feeds and mailing lists to a
single list that can be perused at your leisure. If you
really need to get some of your feeds via email,
open a second, free, account to receive them. Then let
mu4e, or notmuch, or something similar download those
emails whenever you like.
Twitter
You shouldn’t be wasting your time on Twitter but if you
must, Emacs has several Twitter clients that bring
everything into the Emacs environment;
Anti-Social
You don’t need any special tools for this; just
redirect those sites to localhost. If you need finer
grained control, Matt Mite has some suggestions;
Coach.me
You can ask Org to remind you everyday or you can use
any of the several pomodoro applications available for Emacs;
A clipboard manager
Emacs can handle this on its own but you can
make it even better with counsel-yank-pop;
An external drive/backup plan
Emacs can’t do this, of course, but
it is important so get a backup plan that operates in the
background and doesn’t require any action on your part.

If you’re like me, your initial reaction is probably that Emacs is the
obvious choice for STEM folks but that maybe Emacs is too much for
those in the Liberal Arts. Really, though, that’s just snobbery. Many
people in the “soft sciences” and liberal arts have shown themselves
able to learn and use Emacs just as effectively as their brethren in
the sciences and engineering. Just like for the rest of us, Emacs has
a steep learning curve and takes a concerted effort to master but I
doubt it’s harder than learning those other 9 tools.

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The Smartphone as Part of Your Mind

Karina Vold over at the Sigularity Hub has a thought provoking article
on the extent to which your smartphone is part of your mind. At first,
it seems like a silly idea except in a trivial sense. But as Vold
observes,

No other piece of hardware in history, not even your brain, contains
the quality or quantity of information held on your phone: it ‘knows’
whom you speak to, when you speak to them, what you said, where you
have been, your purchases, photos, biometric data, even your notes to
yourself—and all this dating back years.

This idea is not new and is not being pushed just by techies. In 1998,
the philosophers Andy Clark and David Chalmers published a paper, The
Extended Mind
, the explored the idea.

These days, the issue comes up mostly in law enforcement settings in
which questions of privacy are raised regarding gaining access to a
suspect’s smartphone. The courts, oddly, have taken the lead in
examining the issues. Several rulings, some even from the U.S. Supreme
Court, have acknowledged that smartphones have a unique relation to
our minds in a way that, say, paper records don’t.

Those that are looking at the idea seriously raise a number of
interesting questions such as should our phones be treated as part of
our remains when we die? Or, if our phones are really an extension of
our minds, should destroying or wiping them be considered a form of
assault the way injuring someone with a blow to the head is?

Be sure to take a look at Vold’s article. It’s full of interesting
ideas, especially for those of us trying to live digital lives.

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A Return to Emacs

John Goerzen has returned to Emacs after a decade of being a Vim user.
His reason for doing so is Org mode. If all you want from your editor
is to edit, Vim is hard to beat: it’s fast, loads in a flash, and its
composable command set make it flexible and easy to learn. If
you use Vim, however, you’re going to need a bunch of other tools to
handle things like your agenda and TODO lists.

Emacs, of course, has Org mode, which nicely integrates these
functions into the editor and lets you easily link all your data
together under the Org aegis. Goerzen does a nice job of explaining
how Emacs and Org mode make tying together your data and data
collection tasks easy.

He mentions, for example, recording a task to answer an email sometime
in the future. With many tools, this is difficult or impossible but
Org makes it easy to tie an email to a TODO item so that when the time
comes to deal with it, you can simply click on the link and bring the
email up in your email client. I do this all the time and even have a
special template to automatically capture the email link.

Goerzen’s post is the first of a series of planned posts on his use of
Org mode. The second and third are already done and more are planned.
This is a great series for Org beginners. It’s written from the point
of view of a developer trying to streamline his workflow. If you’re an
Org user or thinking about becoming one, be sure to check out this
series.

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A Sound Investment

How much would you pay for Org mode? $10? $25? $100? More? Well
fortunately you don’t have to pay anything at all because, of course,
Org mode is free software in all senses of the word “free.” Still,
free software does have a cost even if we aren’t the ones paying. Most
often that cost is the significant free labor that the implementers
and maintainers provide.

Sometimes the cost includes more than the free labor. Bastien Guerry
is one of the principal maintainers of Org accounting for, according
to Karl Voit, more than 20% of the commits. But now Bastien’s computer
is dying and he can’t afford to get a new one:

I don’t know what computer prices are like in Paris but whatever they
are, if every Org user chipped in a small amount, Bastien would be
able to replace his dying machine with a new and powerful computer so
that he could continue his vital work. Of course, not every Org user
can afford to help but if you can, please chip in a few Euros. I’ve
sent him €20; that’s only about $25 US. If even 100 people do the
same, Bastien will probably have enough for a decent replacement.

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UPSide Project Update

I’ve written a couple of times about Eric Raymond’s (esr) project to
design and build an open source UPS power supply. Esr has posted an
update on the project.

The TL;DR is that they now have all the necessary engineers on board
and have a working design. The design is, of course, subject to
revision and not everything has been finalized but things are pretty
much specified, even down to the component level. They even have had
some interest from UPS vendor representatives.

I really hope this project succeeds. Those of us who really need a UPS
know what a pain they are. It would be nice to have a reliable system
that has an interface to the target computer that is easy to program
for. In my case, I’m mostly interested in powering down systems if the
power doesn’t come back in a minute or two. One of the goals of the
UPSide project is to provide such an interface.

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Zamansky 44: A PDF-view Workflow

Mike Zamansky has another video in his Using Emacs Series available
for viewing. This video demonstrates the PDF-view workflow that he
developed to help him deal with applications to an honors program at
Hunter College.

I really like this video because it shows how he used Emacs to solve
an actual problem rather than just demonstrating an Emacs feature. The
problem is how to deal with (PDF-based) applications and sort them
into ACCEPT/REJECT/MAYBE… categories. Zamansky is very conscientious
about the application process and spends time getting additional
information that he adds as notes to the applications.

By using pdf-tools, he’s able to handle all this from Emacs and to
make annotations directly to the PDFs if he wants. The org-pdfview
lets him add org links to the PDFs so that they open in Emacs.

In addition to explaining his workflow, the video also serves as a
nice demonstration of pdf-tools. I use it all the time and can attest
that it’s a big improvement over the built in Docview. If you haven’t
tried it, take a look at the video to see it in action.

The video is 14 minutes, 40 seconds so plan accordingly.

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Update 2

Still no word back from the hosting provider. They’re probably trying to have a life so I don’t expect to hear from them until Monday.

In the meantime, I’m going to manually paste the HTML for posts into the WordPress editor. I don’t like to do that because the formatting never comes out quite right but at least the content is getting out. Please excuse the poor formatting until things get back to normal.

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Update

As far as I can tell, the problem is at my hosting provider’s end. I’ve opened a ticket and they are working to resolve the issue. It’s clear, however, that today’s post will have to be postponed until I and my hosting provider figure out what’s going on.

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Trouble Publishing

I’m having trouble pushing my latest post to Irreal. I’m investigating the problem and will publish the post as soon as I can.

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