Looking for Data Engineering or Analytics Engineering ideally. Formally trained as a Data Scientist, and I have a Data Analyst + Marketing background. Looking forward to hearing from you!
Well, to be fair, the oil weight is a result of CAFE standards. Squeezing out another .5mpg at the expense of an engine needing to be replaced at 115K miles (outside of warranty, of course) is the cost. There are other costs to improve fuel economy, like being stranded on the side of the road with no spare tire when you have a flat.
Web app that helps motorcyclists and automotive enthusiasts find fun roads to ride/drive. Uses OpenStreetMap data and currently indexes all roads in the US and Portugal. The "YawRate" of a road is a single number that sums up how fun a road is.
This is really cool. I'm currently working on an iPhone app for helping save favorite and newly discovered routes. Wish I had the know-how to add a feature like this haha. I'm just using Apple Maps for my stuff. Nice work! :)
Looking forward to see where you go. I used forums primarily for my automotive hobbies, but they all seemed to have died around 2013-2015 as Facebook groups took over. Still, forums are often the best place to find good information. I worry about the day that Facebook solves the search and weekly "repeat topic" problems that are the only thing holding it back.
It's a shame phpbb, vbullettin and other big players in the space were too slow to adapt to mobile.
> It's a shame phpbb, vbullettin and other big players in the space were too slow to adapt to mobile.
Was that a problem? My memory is that everything used 'Tapatalk' for mobile, perhaps before the first iPhone even (I recall using it on an iPod Touch).
I used to volunteer my time to a very major forum software. Tapatalk at the time had a very strange business model of having a plug-in/add-on that was free to the forum owner but charged for the app that the end user used. This was, even at the time, traditionally backwards from the current user interaction model: path of least resistance to engagement. It was unpopular among forum admins as they would rather buy a license for it like you would with vBulletin, Xenforo, Invision Power Board - including the people who ran open source ones like phpBB, SMF, et al.
While I understand Tapatalk have changed their business model since then, the damage was already done as the Facebook started to wholesale eat forums’ lunch as far as userbase. The biggest problem is that we never turned forum interactions into a protocol like we did with at the application level (smtp/pop, http, irc, xmpp) or on top of http like RSS, podcasts, or just plain, standardized REST APIs. This could have enabled multiple clients (like browsers) to appear and may have prevented facebooks swift dominance with online communities.
Everyone wanted to own their forum’s experience, but this stubbornness caused the fiction for users to sign up to be greater and greater. Platforms like Disqus attempted to solve this by creating an embeddable service to just drop comments in a context like a blog post, but this ultimately gave users almost no value it they were just in a shouting match against bots with generic messages laden with spam.
Facebook unified the experience for users, where the user could, with an account+app that they already had, browse and join groups and engage in discussions and become apart of communities in a way that forums could not possibly compete with.
Oh yes! I'd forgotten that aspect. Was there not anything you could do for free?
I wasn't involved with the hosting/software/ops etc. side of it at all, but I moderated 'The Computer Forum', latterly 'Computer Juice', and used it mainly with that. I fondly remember wasting an awful lot of time helping people solve Windows problems (haven't used it since.. not saying that's related..) and spec new builds.
I suppose that's all happening on StackExchange and probably some DIY custom pc Discord server or whatever these days.
>3) Planes don't feel "right" at the edges of the envelope.
Is there a simulation that does this well? With regard to racing sims, there's still some argument on what has the best tire model. I can only imagine how complex aero and airplane models must be.
Aero models are actually much simpler than racing tyre models.
Most older flight sims used a lookup table for aerodynamic forces, which is gives a pretty decent model for most of the flight envelope. Newer sims do model the airflow around the wings but it's still relatively simple.
Tyre models have similar history, most models are empirical and based on the Pacejka tyre model with some adjustments, not quite a lookup table but some very basic math formulae with no physics behind it. Notable exception is iRacing which has a physically based tyre model based.
But the physical phenomena going on in a deforming, elastic racing tyre are much more complex than a wing cutting through air.
Not sure about the details, Forza Motorsport 4 has completely redeveloped the tire model at some point, with fresh intel from (IIRC) Pirelli, and they only improved since then.
I could be wrong but it seems to go way beyond Pacejka in my experience (including sidewall deformation). On old cars it's night and day.
I assume most sims have moved beyond vanilla Pacejka model by now, but they are generally still empirical models with their roots in Pajecka. The standard model doesn't account for dynamically changing pressures and temperatures, for example.
When tyre manufacturers provide data, it is usually in the form of coefficients for the Pacejka model or some variant thereof, the model being the de facto standard in the automotive industry.
But I admit I don't know the specifics about Forza 4 tyre model.
At least a few years ago, the iRacing tyre model developers said in their dev log videos that their model is unique in being physically based and not an empirical model. But that may have changed.
Empirical models are generally considered "better" feeling for sim racing, iRacing's model is criticized for being bad in handling extreme slip angles and ratios (read: drifting).
Project CARS described their tire model that they developed for the first game[1], based on three coupled simulations for the carcass, threads and heat. They describe it as a fully dynamic model.
Not sure what the state of the art is though, I just recalled this post from way back.
> The standard model doesn't account for dynamically changing pressures and temperatures, for example.
Forza definitely accounts for these, there are three thermal bands exposed in the telemtry UI: outer, middle, and inner. Pressure is a tunable, and it varies with heat.
There is also axial and radial deformation. Like, on small rim/big wall tires accelerating produces a tire twist along its rotating axis, as the wall itself is elastic, which creates a lag in tire reaction, followed by a tightening (and even a bounce) when it reaches elasticity limit. Same on turns when the tires deform laterally and depress, which creates some additional lag/bounce back effects that tally up to create interesting situations at the limit. This all matches up with my (completely anecdotal and limited) real life experience.
Most people play the cars tuned up to a given perf class slot, which often includes rim/tire upgrades by default (there's an auto-tune feature) when handed by the game for the cars to be sort of competitive in that perf class, so they probably don't get to feel that to the full extent. I myself don't care about the perf, I like to restore the car parts and settings to stock condition and enjoy the "original" feel of cars I will probably never drive or ever come near, and lap the car by myself or with a couple of like-minded friends.
> Empirical models are generally considered "better" feeling for sim racing
Yeah, theory has this way of matching reality, save for the corner cases that are the ones being interesting. I god honest don't know what Forza is using, and certainly don't claim it's a super accurate sim, but they did a fantastic job to make it feel realistic to great detail, and gracefully degrading from a full-fledged sim race setup to a gamepad (where it still manages to convey a ludicrous amount of info given the device limitations)
Live for Speed also had tyre deformation, temperature, pressure etc but it was still based on Pacejka model, applied to different parts of the tyre separately.
Unfortunately, every company that I have been at that has tried to implant the Toyota Way just bolted additional processes onto their legacy ones, adding complexity.
Remote: Preferred, but Hybrid or On-site OK
Willing to relocate: Maybe
Technologies: Python, R, Postgres, SQL, DBT, Airbyte, Metabase, Git, AWS
Résumé/CV: https://drive.google.com/file/d/19tSwFoUwjvgO25AbG9E6d2vf3cg...
Email: hire@jacksonde.com
Looking for Data Engineering or Analytics Engineering ideally. Formally trained as a Data Scientist, and I have a Data Analyst + Marketing background. Looking forward to hearing from you!