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Junk_Collector

831 karma · joined July 6, 2017

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Junk_Collector··on How much your computer can do in a second (2015)
If your average connection has 100 ms (50 ms would be extremely good but doable these days) of round trip latency to Google.com, then you have a hard upper limit of 10 loads per second just to connect to the system. Then you have to move the data, store it in memory, parse it, and run it.
Junk_Collector··on When Covid-19 deaths are analysed by age, America is an outlier
I'm not trying to pick fights with experts or claim there there is some hidden agenda to inflate death counts, I just want frank discussion of the data. Now, from the CDC methodology you linked,

"For COVIDView, the percentage of total deaths occurring in a given week that had pneumonia, influenza and/or COVID-19 (PIC) listed as a cause of death is calculated. PIC deaths are identified based on ICD-10 multiple cause of death codes J09-J18.9 or U07.1. PIC is being monitored in order to provide a more accurate representation of COVID-19 related mortality than would monitoring COVID-19 alone. Deaths due to COVID-19 may be classified as pneumonia deaths or influenza deaths (deaths due to “flu” or “flu-like illness”) in the absence of positive SARS-CoV-2 test results. The combined PIC categorization also prevents double counting of deaths"

The death rate from Covid-19 includes deaths from other causes that have similar symptoms. The reasons for this are good, it's very difficult to identify between these diseases and lumping them together probably gives a more accurate result than relying on confirmed cases. There's no malice here, it's just a very difficult problem to work on, but it's also a methodology that should be likely to give a high side estimate. Then from there, they calculate excess deaths [1], which I was able to find through your link (thank you). Outside of New York/New Jersey and Massachusetts, I don't find a high disparity in the excess death ratio that supports the idea that there is significant under reporting of deaths.

You can find cause of death vs year on their charts at [2] and most of the excess deaths are from cardiac arrest or dementia. Now, that could be caused by Covid, except if we go to New York where Covid has been by far the worst in the US, you see a huge jump in respiratory deaths directly lining up with the peaks in the reported Covid cases. So are more people having heart attacks? Is Covid causing heart attacks? Are people unwilling to get treated at hospitals for heart attacks because they are afraid of Covid? These are unanswered questions and it could go any which way from what I understand. The data appears to be out, and I think it will be out for a while which is why I don't feel comfortable pushing the idea that we are under-reporting deaths or over-reporting deaths because I think that we don't actually know.

[1] https://www.cdc.gov/nchs/nvss/vsrr/COVID19/index.htm [2] https://www.cdc.gov/nchs/nvss/vsrr/covid19/excess_deaths.htm...

Junk_Collector··on 'We've bought the wrong satellites': UK tech gamble baffles experts
These satellites are likely too small to support a proper positioning system. They would need the radio transmitters, power system, and clocks all redesigned at which point you have an entirely new satellite.
Junk_Collector··on When Covid-19 deaths are analysed by age, America is an outlier
Is this really true though? Most states report separate numbers for cases and confirmed cases as well as deaths and confirmed deaths. In Texas there is something like a 3 order of magnitude difference between the number of reported cases and the number of confirmed cases and you can see wild discontinuities in the reporting data as they periodically change their methodology and or criteria. New York, for instance, was reporting deaths were Covid-19 might have contributed rather than confirmed deaths.

My biggest problem is that while it is trivial to find mountains of Covid visualizations, raw data with clear explanations of it's criteria and methodology is very hard to come by. I think it's quiet likely that some locations are over reporting and others are under reporting.

Junk_Collector··on What vertical farming and ag startups don't understand about agriculture, part 2
Modern farming is heavily dependent on positioning and weather satellites. The quality of these services scale with density and SpaceX lowers launch costs which allows more satellites which in turn will create more efficient harvesting and help prevent crop losses due to unexpected weather events.
Junk_Collector··on Companies Pitch Shortwave Radio to Shave Milliseconds Off Trades
Yes, that would commonly be called circular wavegguide. The issue with using waveguide is that it is very expensive to run over distances. WR-75 flexible waveguide, for instance, costs roughly $1k/ft.
Junk_Collector··on University of the People: Tuition-Free, Accredited Online Degree Programs
While there are some truly staggering examples of US college loan debt, the average loan debt at the end of a 4 year degree in the US is $26k or about the price of a new mid range car. For the majority of people, their total college loan debt is below a single year of their first year annual income out of college and certainly not 5-10x.

[1]http://www.collegescholarships.org/loans/average-debt.htm

Junk_Collector··on Brilliant Hardware in the Valley of the Software Slump
Running old software on new hardware is by far the best user experience that I've had. Everything is blazing fast to the point of feeling instantaneous.

Unfortunately it's getting harder and harder to keep things running with various licensing schemes and whatnot. Hell Microsoft even keeps breaking my old Office install with windows 10 updates forcing me to constantly fix it because they want me to update to their office 360 offering. All that said, both the hardware and software stack are getting a little silly even at the low level. You can send a keypress around the world as a data packet faster than you can send it to your monitor now a days.

Junk_Collector··on Brilliant Hardware in the Valley of the Software Slump
Is it not insane to anyone else that we talk about only having 8 GB of ram with regards to the performance of mail and chat applications?
Junk_Collector··on Terahertz radiation can disrupt proteins in living cells
It's interesting to me because this same team published https://www.nature.com/articles/s41598-018-28245-9

which claims to show that THz radiation promotes actin filaments, but their new publication claims are that the THz radiation induces mechanical vibrations which remove or destroy actin filaments. It will be interesting to see where this all goes.

Junk_Collector··on Detecting a 2.4 GHz transmission for under 1 EUR
For $35 most of the scope you see are going to be repurposed sound card chips acting as a digitizer. They work ok-ish but you get what you pay for.

My big problem with a USB oscilloscope is that they are only ground referenced through the USB ground to your computer and if you measure something with a different ground reference you can blow up the USB port on your computer.

Junk_Collector··on A complete 4-year course plan for an AI undergraduate degree
First off, Ethics course requirements are incredibly common in engineering studies and I've never heard someone accuse lawyers of enforcing ethics. They enforce law and contracts, and are inherently reactive. The existence of lawyers has certainly not prevented a variety of engineering disasters that could have been avoided if the engineer had chosen to act differently.

Now, is it an ethical dilemma if you are asked to write firmware that disables a redundant safety sensor unless the customer pays additional fees? Is it a ethical to use a dataset that you may know is not fully representative for a crime estimation algorithm in order to achieve cost targets for your contract? Is it ethical to write a software that changes device behavior when being examined by regulators? Is it ethical to design an interface for a public service that will be inaccessible to a portion of the population to meet contract deadlines?

>learning what is useful for your employer" is exactly what university is about, is exactly what you pay for, and is exactly what is expected This is a warped viewpoint that assumes you have no agency. I studied engineering because I wanted to learn how it worked and how to build things. Employers be damned, I have no issue working for myself if I cannot find an employer who I can come to terms with.

If you mean to argue that the standing of engineering as a profession has greatly fallen then I agree with you. Especially in software. However, even if there is no license to be revoked, and no personal feeling of responsibility, the engineer who makes these design choices is not shielded from the legal repercussion of his actions no matter how many times his supervisor told him to even assuming he is willing to be responsible. No matter how much you may wish otherwise, engineers are still considered to hold the public trust and expected to behave accordingly. And you should consider it because when you comply with your employer to do something unethical and shit hits the fan, they are going to put you immediately in front of the firing squad to shield themselves from as many bullets as possible just the same as they are going to take the reward for as long as it flies under the radar.

Junk_Collector··on A complete 4-year course plan for an AI undergraduate degree
Possibly that people from underprivileged backgrounds are unlikely to have high speed and reliable network services, that using image mapping makes a website unusable by the vision impaired, and that making a website such that it's layout changes after loading can prevent navigation by systems for people with physical disabilities?

While in most forms of engineering, a lack of ethics can demonstrably lead to death (and AI is no exception when you look at proposed use cases in military and law enforcement) even web developers work on things that are for the public good.

Junk_Collector··on A complete 4-year course plan for an AI undergraduate degree
This recommendation only specifies 9 credit hours (at most) a semester which free study in the 4th year. I know that you have to build in room for your cross discipline and electives, but it's not a very tight schedule. Which is good because it's also missing Differential Equations, Set Theory, Fourier Analysis and Stochastic Calculus all of which are mathematical underpinnings of AI. I also agree that they need a class on Software testing or validation or something along those lines.

A crash course in Filter theory, so that people have some historical background of where these methods derived from would be useful as well.

Junk_Collector··on Zoom fatigue is real
You would think this sort of functionality would be implemented in sound cards but I can't think of any significant advancement in audio processing in years.
Junk_Collector··on Pentagon official: FCC decision on 5G threatens GPS, national security
FR1 (the low band 5G) is capable of greater carrier aggregation and denser QAM modulation than LTE-A so it can achieve higher bandwidths than LTE-A under good conditions. It also has better latency and congestion controls which should provide a better general use experience as well as reduce degradation in heavy traffic. It also pushes more open hardware/software standards for base stations to reduce vendor lock-in.
Junk_Collector··on Pentagon official: FCC decision on 5G threatens GPS, national security
The counter 5G bandwagon seems to be largely comprised of conspiracy theories, dubious health claims, and unqualified assertions that people don't want more bandwidth. Why would you poison a legitimately important topic like spectrum allocation with associations like that?
Junk_Collector··on Pentagon official: FCC decision on 5G threatens GPS, national security
There exists a fundamental level of electrical noise at all frequencies typically controlled by the background temperature that sets the minimum level of signal you can resolve before it gets washed out in noise. GPS uses multiple coherent (noise being random instead of coherent does not combine at the same rate) copies of the signal that can be recombined to increase their effective signal, so even though they are transmitted below the universal noise floor, they are above it once recombined.

*edited for spelling

Junk_Collector··on Google's top quantum scientist explains why he resigned
The wiring thing highlights the problem I think. He was the hardware manager but he didn't actually have control over the direction of the hardware team. That's a terrible position to be in.

Also, don't underestimate wiring in a quantum computer. I don't know the details of Google's system but Quantum computers uses analog RF pulses to interact with the Qubit system which are then later digitized. The design of a wiring system in a Quantum computer is similar to what you would see designing a high end phased array radar system with the need for everything to be phase matched, highly stable, and temperature controlled except that a quantum computer is also extremely susceptible to cross talk at the interfaces. Wiring a system of Google's scale can easily run into the $100k+ range in just material and manufacturing costs. If the other person didn't have any experimental experience like Martinis says, then he would almost certainly run into problems.

Junk_Collector··on Three free meals available daily for any New Yorker
Right, it all makes sense, I'm just curious about the process and long term scope of the program. The official announcement that I am aware of is pretty spartan.

It also shows the conflict of wanting to keep as many people employed/working as possible while also wanting to keep people quarantined.

Junk_Collector··on Three free meals available daily for any New Yorker
I wonder why this is done through the Department of Education and if they will continue such a program when schools are back in session. People normally don't like a bunch of random adults hanging around schools.
Junk_Collector··on Teardown of a $1.25 LED Lightbulb
This is actually a pretty big deal if you work with high speed or rotating machines. Using an high flicker LED bulb over your lathe (for instance) can cause it to appear static when it is in fact running due to visual aliasing. There are lines of flicker free LED bulbs for industrial spaces for this reason.
Junk_Collector··on Judge rules that student loan debt is dischargeable in bankruptcy
I also strongly dislike the focus on college football but Texas has close to 100 universities as well as many additional research institutions (that can confer a phD) and many of those have serious research funding without a sports team. University of Texas systems has 14 universities alone, and only 1 football team.

Personally, I think High School Football and funding is a much larger problem in Texas.

Junk_Collector··on Thousands of Google’s cafeteria workers have unionized
Simple perks like free coffee are a canary for the corporate coal mine.

When you look at the cost of coffee or soda, providing it free may cost the company in the ballpark of $500 a year per employee (though often less) which is minuscule in the total annual cost of an employee. Taken in a vacuum however, the number looks big. We spent how much on Coffee last quarter! When companies get to the mostly investor owned squeezing for growth stage, it's almost always among the first thing that gets cut. This is then usually followed by other more important quality of life cuts like training, equipment, and bonuses. Many companies hit this stage and start increasing margins by letting inflation eat their employee's high salaries over time for instance.

Junk_Collector··on Quantum Dominance, Hegemony, and Superiority
In my own anecdotal experience it's very few people and even then they are each only particularly offended about some rather specific subset of words. They just happen to be very vocal about it and then they usually have some cadre of people who don't particularly care about the word/phrase, but get upset that you upset someone in their group. I also seem to encounter this much more often within academia than business. The internet tends to amplify things, especially twitter.

That said, I was recently discussing a legacy instrument control setup with a customer (GPIB based) and was discussing the master slave controller and they got agitated with my wording. Eventually I realized what was going on and we switched to Main/Secondary and everybody was happy. I'm never going to pick an ideological argument with a customer especially when there is actual work to be done, but I got a private laugh later because Master and Slave were embossed on the connector name plates.

Junk_Collector··on How Complex Modern Headlights Can Be
It's almost funny that it's not permitted in the US because the technology behind the headlights are from Texas Instruments.
Junk_Collector··on S&P 500 Buybacks Now Outpace All R&D Spending in the US
I've never understood this take. Buybacks cannot be analogous to dividends because they require you to relinquish your stake in the company to realize the gains.

It's a public buyout offer, not profit sharing.

Junk_Collector··on H-1B in 2020: Immigration Visa Faces Further Restrictions
I don't think the schools are all that different myself and in some ways are probably better than ever. I do think it is easier than ever to get through school without actually learning what you are exposed to.

In engineering maths, people lean on Wolfram Alpha to solve and break down equations then pretend like they understand because they know the steps. You can look up endless discussion and breakdown of rhetoric and take a position as your own without applying much critical thought beforehand. Cliffnotes. People these days seems to think that because they can look up information it's the same as knowing it.

That's before we get into issues such as institutional cheating. I know a person who makes most of his daily cash shadow writing essays for college and high school students. It's done through an anonymizing method on the web. No idea how many he actually writes, but he seems to write a lot of them especially late spring/fall.

Junk_Collector··on Oxide Computer Company: Initial boot sequence
Looks like one of the higher end hobbyist Weller soldering irons and an old single channel bench power supply. I'd have to hazard that this is an office that happened to be set up in a garage.
Junk_Collector··on The rise of solar is ‘jeopardising the grid’ and it's a lesson for Australia
I'm curious how you approach the earthquake problem with underground pumped hydro storage?
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