leghifla
Joined 8 years ago
Joined 8 years ago
I complained about a failed delivery (broken box, one item missing). They refunded me but then immediately put me on a watch-list, threatening to ban me if I ever complain again. I will never buy anymore on amazon.
A set of wheels and a cushion do not make a good wheelchair, if you want to live an active life. Please see https://news.ycombinator.com/item?id=41721976
I am from Europe and chairs are a bit less expensive here, but an "active" wheelchair is usually more than 2k$ anyway, often closer to 3k$. And some are much more than that (for instance if you want a soldered chassis)
I have no idea why a car should be more than 10k. On Amazon you can get a go-kart for less than 100: https://www.amazon.com/s?k=go-kart
It is really the same comparison. A true every-day wheelchair or a "hospital" wheelchair that will make you sweat after 10 yards
None of the chairs you have shown are suitable for daily use. Even the "Magnesium" one.
One of the most important point (beside being the right size) is to be able to move the center of the rear wheels just behind the center of gravity. Too far rear and you have very good stability (hospital chairs), but you need to use most of your strength just to be able to turn (and you take a lot of space for turning). Too far ahead and it becomes dangerous. So it must be adjustable. In theory this should be possible on a cheap wheelchair, but I have never seen it. Probably the weight ditribution is too different (most is on the rear wheel) that the chassis must be thought differently?
My account is not closed (but they "reserve the right to close it" anytime). I am glad I have no kindle or DRM stuff...
I tried to get an explanation, but just got a robot email.
I will never buy there anymore. Even if some stuff are hard to find elsewhere
For some reason (I think someone dived just in front of me), I needed to stop swimming and ended "vertical" in the water. It was quite unusual for me at the time. For a moment, I tried to go back to swim horizontally on the belly, without success. Then tried on the back, no success either. After a few tries, I began panicking like it is said the the video: I was just climbing an invisible ladder... A guard finally helped me reach the border of the pool and that was over.
After that, I tried to put me under the same circumstances: vertical in the water, 2 m from the border. And then convert to horizontal swimming. Every time it was easy. To this day, I still have no clue why I was not able to do that
Some parts of the algorithm were easy to test, others very hard. On the easy part was loading and saving the file. I tried to test as best as I could, but the lossy part was not really tested.
Then time to benchmark the algo on some images. The results were kind of OK, but some images compressed much better than others at low bit-rate, while the content did not look much different.
On square images, everything was fine. On rectangular ones, at high-bit rates it was somewhat fine, but strange patterns like ghosts of another part on the image started to appear for lower and lower bit rates.
Of course, I searched on the mostly algorithmic parts what was going on, and failed. Only after a holiday break and fresh eyes did I found the root cause: inversion of height and width in some part of the loading AND saving.
I had "end to end" test of the loading and saving, but the error was symmetric, so undetected. Young engineer error...
Of course it is a goal, but not always possible. You sometimes have two (or more) conflicting "relations" in the codebase. E.g.: you are dealing with taxes in various countries. Do you group by country or by kind of taxes (on sales, profits, earnings, energy, real estate...) ?
The right answer really depends on how your team is organized and how you are making changes.
To achieve that, the max acceleration must be quite low (software controlled), and the whole experience is sluggish, like trying to steer a car by pulling on rubber bands attached to the wheel.
From the moment I found a way to overcome this, I never went back. I know that I can hurt myself if I do something stupid, but I prefer this hypothetical risk instead of cursing 100 times a day because I cannot move how I want. It has been 10 years and I never got hurt.
I understand that such "high" risk device cannot be sold, but forbidding someone to change this is like inflicting a second handicap on him.
Back when I started programming, I did simulate a jackpot machine in software (no money involved). The final probabilities were fair, but I added a twist while rolling the images: before stopping, the probability of having 2 or 3 of the same image was quite significant... My younger brother was instantly hooked to it. The trick made him overestimate the probability of having 3 images the same, as he was seeing this pattern quite often just before stopping. This made me realize of fucked-up casino can be, while still abiding by the rules
The creators "invested" in foreign companies that would buy their product. They had realized that $1 of product sold was making them much more than that in the stock exchange...