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julosflbon Ask HN: What have you created that deserves a second chance on HN?

https://www.d2xlab.com/app

I built an interactive viewer/editor for time series. that can load data from text files.

In my previous job, I spent a lot of time dealing with time series collected from various simulations and measurements, so I wrote a desktop app. When I quit I was missing the tool so I partially rebuilt it in the browser!

julosflbon Investors conclude that Tesla is a carmaker, not a tech firm

Jumping from computer to cell phones appears to me order of magnitude easier than jumping from computer to car buisness.

julosflbon What it's like to live in Monaco

yes they do have schools, even high schools.

julosflbon Ask HN: How innovative is the hydrogen industry?

The answer is to build enough for the average load

Not really as the round trip efficiency of electricity to h2 to electricity again is only in the order of 30%. So it will be less attractive than that.

julosflbon Ask HN: Has anyone tried to model the entire business world as a graph?

This thread may be of interest as somewhat related, with modeling of the energy flow at global scale. https://news.ycombinator.com/item?id=31966435

julosflbon Ask HN: Why isn't remote work advertised as a pro environment initiative?

We shouldn't forget that only a small portions of jobs are eligible to WFH. How the vast majority of non remote workers will commute to work?

julosflbon Exxon’s Exodus

Total HPC ranked 1st in 2019 within commercial sector.

https://newsroom.ibm.com/2019-06-18-IBM-Develops-Worlds-Most...

julosflbon New Offshore Wind Design: 20% the weight and 30% the price of conventional

There is a french company with similar concept. They did already some testing at sea.

http://eolink.fr/.

julosflbon Just-in-time code generation within WebAssembly

I did implement a math parser a couple of years that did JIT wasm code generation. It operated on 1d array, providing kind of numpy syntax. It achieved a very decent performance. It was quite some fun.

julosflbon India’s biggest businesses are tapping green hydrogen as a future fuel

Hydrogen as such can't replace fossil fuels as it needs to be produced first using energy. It is only a vector. So many people make the confusion thinking that hydrogen is the solution.

julosflbon Over 15% of world population has a headache on any given day

Idem for me. Too much sleep or late wake up during the week end tends to cause me migraine.

julosflbon Why DC May Replace AC (2019)

Blade pitching first use is to reduce the aerodynamics power above the rater power point of the turbine and avoid overload.

julosflbon Why did renewables become so cheap so fast? (2020)

Capacity factor of latest floating offshore wind can be as large as 57% (https://www.equinor.com/en/news/20210323-hywind-scotland-uk-...). 30% is typically what you get onshore.

julosflbon Boring Technology Checklist

In aerospace engineering you would usually select technologies based on a concept of technology readiness level, which provides a framework for evaluating new technology and make sure you are in control of their maturity.

https://en.wikipedia.org/wiki/Technology_readiness_level

julosflbon 13 years sailing around the world

Finding a boat on a budget is easy. What is not is finding a harbour post to moor it. At least here in south of France, this can get really expensive and you may have to wait for years before getting one.

julosflbon Getting Started with QGIS, PostgreSQL and PostGIS

I recently discovered Qgis as I had to put on maps various data. I was quite amazed by its capabilities while being relatively easy to learn. Definitely a great open source achievement!

julosflbon Will real estate ever be normal again?

Mortgage on your home residence also acts as life insurance. If tomorrow I die, my mortgage will be 100% reimbursed by the mortgage insurance. This was a motivation to buy in my case, to protect my kids.

julosflbon Hertz orders 100k Teslas

Exactly what Total did: they rebranded themselves few months ago as TotalEnergies...

julosflbon Show HN: Edit Time Series in the Browser

I use it routinely with 50mb csv files, and successfully managed to load files as big as 500mb.

julosflbon Public health impacts of an imminent Red Sea oil spill

> Interestingly, the ship itself doesn't appear on any of the "vessel finder" type websites that I can locate,

Vessel finder & al rely on AIS signal sent by vessel. The AIS beacon probably stopped emitting.

julosflbon Show HN: Edit Time Series in the Browser

I started writing this web app during first lockdown as an experimental port of a internal desktop app we were using at my company. I was curious about the performance that could be achieved by a pure web app solution. It turned out to be quite capable so I decided to move forward.

Basically this is a handy tool to plot and edit time series, typically obtained from measurements or produced by simulations.

One of the main feature is the built in expression parser that can be used to combine time series and which is reasonably fast thanks to JIT webassembly compilation.

julosflbon Hydrogen’s moment is here at last?

> Hydrogen is a great battery

Indeed, but the round trip efficiency is hardly exceeding 30 to 40%.

julosflbon Archaeologists find ancient Egyptian warship sunk near Alexandria

The wave making resistance is generally much larger than pure viscous drag/friction on the hull for conventional boat.

julosflbon Maybe you don't need Rust and WASM to speed up your JS (2018)

"Javascript JITs are really good, you (likely) aren't going to see major performance improvements by dropping into WASM."

WASM may not significantly outperform the JIT of one particular browser on a given scenario but you are more likely to get homogeneous performance across different browsers.

julosflbon wxWidgets 3.1.5

Idem. I developed quite a number of desktop apps in a professional environment using wxPython. I found easy to quickly prototype new ideas. Also, you have access to the rich python ecosystem that other solutions for producing desktop apps won't have.

I found the API to be usable although the event system is bit limited in my opinion.

I even chosen it to develop a commercial app in c++(https://seamuove.com) mainly because I knew the API. Bonus is that you can produce small single exe using static linking.

Overall thanks for the effort dear wx team!

julosflbon Spreadsheet is a software development paradigm

"The gridlines are the most important feature of Excel, not recalc"

So true.

julosflbon Ask HN: Which technology for creating internal desktop application?

Application shall be usable without any network.

It is mainly about creating new tools, some of them currently existing as spreadsheet.

Update/fixing small bugs shall be doable by engineers that have basic coding skills. So the deployment shall be easy.

julosflbon Ask HN: What are you working on?

I'm building a time series viewer / editor running in the browser.

I'm working in the ocean engineering space where we extensively use time domain simulations and need to view/edit/transform a lot of time series data. I had previously build a proprietary desktop version at my current company.

One of the key feature is the embedded expression calculator that's operating directly on the times series in a vectorized fashion.

I have a proof of concept running, but still a lot to implement before I can disclose it.

julosflbon Rotating Sails Help to Revive Wind-Powered Shipping

Related to this, a french startup is trying to build fleet of autonomous ships to harvest energy from ocean. They make use of flettner rotors also.

https://farwind-energy.com/

julosflbon What I Learned About UX Writing from a British Prog Drummer and David Lynch

Yes and usually the click ends up on an ad... I'm wondering sometimes if this is not intentional to artificially increase click on ads.