Hacker News: bunje

New comment by bunje in "Texas repeatedly raises pollution limits for Cheniere LNG plant"

bunje — Sat, 25 Jun 2022 16:13:05 +0000

How quickly do you think stopping the sanctions would bring the energy prices down? Russia already stopped gas exports to several countries.

New comment by bunje in "Integer vs. Linear Programming in Python"

bunje — Sat, 07 May 2022 05:35:11 +0000

In university I learned about the simplex method which can be applied to linear programming. I don't know if it's used by modern solvers.

New comment by bunje in "Ask HN: Developers who switched careers, what are you doing now?"

bunje — Sun, 20 Mar 2022 14:37:47 +0000

I did software engineering for 3 years after graduation. Now I teach mathematics in a high school since '20. Software engineering was very stressful for me and I also wanted to sync holidays with my kids. Parents seem to value my background. Pay is low but I have a reasonable amount of extra time to tinker.

New comment by bunje in "Why isn't there a replication crisis in math?"

bunje — Wed, 02 Feb 2022 21:39:31 +0000

"Mathematics is the part of physics where experiments are cheap." - V.I. Arnold

New comment by bunje in "Robotics 501: Mathematics for Robotics"

bunje — Thu, 27 Jan 2022 15:31:55 +0000

QR factorization is cool because it is part of QR iteration and you can use it to find all zeros of a polynomial at once.

New comment by bunje in "Supersonic Trebuchet"

bunje — Wed, 01 Dec 2021 21:14:36 +0000

Solutions to differential equations belong to infinite dimensional function spaces unless discretized.

New comment by bunje in "Deaths involving Covid-19 by vaccination status, England"

bunje — Wed, 15 Sep 2021 16:52:02 +0000

I don't understand, there were over 50k non-covid deaths in the twice vaccinated and around 500 covid deaths. That sounds significant, or is it due to the age distribution of twice vaccinated?

New comment by bunje in "Sci-Hub is fundraising"

bunje — Sat, 07 Aug 2021 21:29:56 +0000

I think in the past journals prohibiting the use of preprint archives was more common.

New comment by bunje in "Dark Matter: The Situation Has Changed"

bunje — Sat, 08 May 2021 13:15:25 +0000

How are the theories incompatible? My basic understanding is that GR describes how the space looks like and Standard Model describes fields defined in this space.

New comment by bunje in "Beyond Meat’s Beyond Burger life cycle assessment (2018)"

bunje — Fri, 07 May 2021 06:17:51 +0000

Colon cancer risk is increased by 28% due to excessive consumption of red meat.

New comment by bunje in "France cuts two nuclear-powered submarines in half to make one new one"

bunje — Thu, 15 Apr 2021 09:48:51 +0000

I would guess that it is much more dangerous to modify a modern car because they utilize nontrivial shell geometry to improve the rigidity or to reduce weight. When I was attending driving lessons, my teacher claimed that the specific shape of the windscreen or rear window was a very important safety feature in the scenario that the car rolls over.

New comment by bunje in "Galerkin Approximation"

bunje — Sun, 28 Mar 2021 06:54:06 +0000

I think variational problems are more naturally understood through energy minimization. You start with the energy of the system and try to minimize it via derivatives. Then you arrive at a variational problem. The differential equation is then more of an afterthought.

New comment by bunje in "Galerkin Approximation"

bunje — Sun, 28 Mar 2021 06:51:12 +0000

Finite differences are simple in cubes and domains that can be mapped to one. Not so much in an arbitrary tetrahedral mesh.

New comment by bunje in "Manim – an animation engine for explanatory math videos"

bunje — Thu, 18 Mar 2021 05:37:25 +0000

As a teacher, I'd like to use this in presentation slides, i.e. pause the output at specific times and continue only after a button is pressed. Does anyone know if there exists a tool, e.g., to automatically pause MP4 playback at specific times?

New comment by bunje in "Jair Bolsonaro: Organized Crime and Corruption 2020 Person of the Year"

bunje — Thu, 31 Dec 2020 13:25:07 +0000

I cannot understand what you are implying. Can you be more specific?

New comment by bunje in "A ubiquitous tire rubber–derived chemical induces acute mortality in coho salmon"

bunje — Sat, 05 Dec 2020 07:06:22 +0000

Why is that?

New comment by bunje in "Less than half of Americans know that alcohol is a carcinogen"

bunje — Wed, 02 Dec 2020 20:56:23 +0000

I checked some of the references at CDC web page and seems that I won't die any time soon drinking one beer a day (male, non-smoker). E.g., https://pubmed.ncbi.nlm.nih.gov/26286216/

New comment by bunje in "The Most Common Errors in Undergraduate Mathematics (2009)"

bunje — Thu, 19 Nov 2020 15:40:40 +0000

So you say we should specify when 2 means number two and when it means the constant function? How does it help?

New comment by bunje in "Tiny bubbles under a ship may help reduce fuel consumption"

bunje — Sat, 14 Nov 2020 15:18:25 +0000

I've analyzed performance data from air lubrication vessels with some retrofits included. Frankly, never witnessed over 5% gain. At specific velocity range the gain could be 5% on average if the installation has been really successful. They might be better nowadays.

New comment by bunje in "JuliaMono – a monospaced font for scientific and technical computing"

bunje — Sat, 10 Oct 2020 08:41:23 +0000

So you need a special editor to write code in Julia?