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Comment Re:Looks slow to me. (Score 1) 78

Two modern techniques for building are SIPs (structural insulated panels) and ICFs (insulated concrete forms). Both methods involve foam insulation and also reduce the time to build. They're both just as costly, though. SIPs are constructed in a factory and the panels are trucked to the jobsite but exterior siding and interior drywall still need to be done on site. Stone and brick are great materials for longevity but are less energy efficient.

Comment Re:Can it be used locally? (Score 1) 64

I have been able to "smarten" dumb appliances by plugging them into smart power switches. For less than $8 each I bought a couple boxes of smart switches from Amazon, then reflashed them with Tasmota -- no more cloud! -- and joined them to Home Assistant. Now any device I want to be smart, I plug it into a smart switch and monitor the power.

One of my scripts monitors the power draw on my dryer, and when it goes above 100W for a minute then drops below 10W for 15 seconds, it knows the cycle is done and alerts us to go down to the basement and take out the clothes before they wrinkle. A similar script monitors the washer.

The refrigerator's plug has a script alert me when the average daily power draw is higher than normal. I added that after my son called me from his most recent vacation and said "my refrigerator is using more power than it should, can you go check it?" Sure enough, their freezer door had been left open by their toddler. Of course the food was already thawing, but we cleaned it out a week before they would have come home to a house full of rotted food stench. And before you ask, yes, when I installed Tasmota I configured the switch to be "always on", so that even if Home Assistant thinks it would be a good idea to shut off the refrigerator's power, it can't.

I also have a small water pump on a smart switch. Normally the pump draws 36W, but when it runs dry it draws 30W. Now if the power consumption drops below 33W and stays there for a few minutes, it shuts off the pump and alerts me that the water is low.

So I get what I need -- timely information about the equipment in my home, automated reactions when things go bad that might keep things from getting worse, and no cloud involvement from any sleazy appliance manufacturers. And an $8 plug is a lot cheaper than paying a $400 premium for a "smart washer".

Comment Re:what about needs to work with local server off (Score 1) 64

Tuya's become a nightmare to deal with. They've decided they fear local integrations because they're losing ad revenue when people don't use the Tuya app. They have been going to progressively greater lengths to prevent device buyers from bypassing the Tuya servers and running their stuff locally.

My understanding is you can no longer register for a free Tuya developer account that lets you set it up with the "Local Tuya" integration for HomeAssistant -- you have to have a paid developer account, if it works at all. And their libraries used to flash right onto an ESP32, but now they're encouraging developers to more secure chips, in an attempt to prevent end users from reflashing their own devices with firmware (like Tasmota) that no longer communicates via Tuya services.

I wouldn't buy anything Tuya with the hopes that it will someday integrate with anything else. If you buy them, expect them only to work with the official apps.

Comment Re:more data (Score 1) 64

PKIs were designed for offline use. There are a couple hundred trusted Certificate Authorities that each issue a "root" certificate. These root certificates are distributed worldwide, in browsers, operating system distros, phones, etc. When you encounter a certificate in the wild, you have to verify the certificate before accepting it, which is done by checking what you can locally: is it expired? Does its DNS name resolve to the name on the cert? Does it have a valid signature? This means checking to see if it was signed by a CA certificate that you already have in your local trust store; if so, you can accept it without going online.

Not to say that the online component of certificate validation isn't important, but it's of varying importance depending on the risk level. When online you should check for certificate revocation, which is to check to see if a previously issued certificate has since been flagged by the CA as compromised and revoked. This can be done by looking for it on a Certificate Revocation List (CRL) published by the signing authority, or by querying the authority's Online Certificate Status Protocol (OCSP) server. But it's an optional step, and can be skipped in low-risk situations (such as being offline.)

Comment Re:We were told from the very beginning (Score 1, Insightful) 501

Two things I think are frequently lost in these discussions:

1. When Fauci made his statement about people not needing to wear masks, people tend to forget the context of the situation. At the time, mask manufacturers were caught off-guard and there was a huge run on masks. They were extremely hard to find to buy. Hospitals were running out and having a very hard time procuring the masks that they needed to perform operations. They were actively trying to discourage people from hoarding masks so that medical providers could have "dibs" on acquiring them first.

Once the supply line caught up with demand and they were more easily obtainable, they changed their position—but not because the facts or evidence of their effectiveness changed.

It wasn't just masks to which this flawed logic was applied. When the COVID vaccines first became available, people who were over the age of 65 were given priority on getting them. A bunch of people willfully ignorantly took that to mean that people who were younger just plain didn't benefit from having the vaccine. Nothing could be further from the truth; it benefits them greatly. But with a highly limited supply, we necessarily had to prioritize who got the shots first.

2. When you wear a mask, it isn't particularly effective in protecting you from COVID. Its purpose is to protect everyone else if you have COVID, especially since in the initial stage of infection many people were asymptomatic. As mentioned in comments above, it prevents a 10-foot plume of aerosolized infected saliva from projecting forth from your sneezes, coughs, and even just breathing. The idea is that if everyone is wearing a mask to protect everyone else, then you'll have a much higher level of protection also.

Living in the South of the US, I can't count the number of times I heard chuckleheads explain to me how those masks still let particles through. They couldn't wrap their brains around the point being that those particles for the most part won't be there if everyone is wearing masks. And it's not just COVID that controlled by masks. Did anyone notice that cases of the flu dropped to a fraction of its normal rate of infection where people consistently masked up?

Comment Re:Did the BBC have his blessing? (Score 1) 53

Why does this asshat feel he's entitled to something his father did 14 years prior to his death?

Because of huge sums of money involved if he can hit this hail mary. It sounds like he doesn't give a shit what Doctor Who fans think about him, so why not take the shot?

(Note that I'm not endorsing that mentality, it's asshattery. But I certainly understand why he's doing it, and why others in his position might also take a shot at it even if deep down they know it's not right.)

Comment Re:Multiple optimizations (Score 1) 102

Why would your battery be drained? Leading up to an outage, you would be using utility power to run your heating and other stuff, not the battery. The battery would only need enough juice to stay charged at full. And because of the way modern battery packs work, that means that it would only charge up at periodic intervals, never letting the capacity get below maybe 80% to 85%. (But could be set arbitrarily high, depending on need given outage frequency and average length.) And that charging would happen during non-peak hours, so there's no extra load on the grid. I have an EV, and that's how I have my car set up today to charge; in the middle of the night when the grid is nowhere near peak load. This "problem" has been solved long ago.

The availability of solar or wind power has nothing to do with this conversation. We were talking about load distribution and how much the grid would be taxed with batteries at people's houses, not energy sources. But just to counter the FUD...

Wind turbines work fine during bad weather if they're properly maintained. Plenty of countries with more bad weather than we have generate plenty of wind and solar power, including places like Sweden, Finland, Denmark, Norway, and Germany.

What you're likely thinking of is the problems that Texas had in 2021 due to a freak ice storm. A bunch of right-wing nitwits got all over television and the internet to decry how unreliable wind power is, when in fact, it was natural gas that took the heaviest hit in failing to supply enough power. Windmills actually worked much more reliably during that snowstorm. (Citation)

[W]ind turbines — like natural gas plants — can be “winterized,” or modified to operate during very low temperatures. Experts say that many of Texas’ power generators have not made those investments necessary to prevent disruptions to equipment since the state does not regularly experience extreme winter storms.

While Webber said all of Texas’ energy sources share blame for the power crisis, the natural gas industry is most notably producing significantly less power than normal.

“Gas is failing in the most spectacular fashion right now,” Webber said.

Dan Woodfin, a senior director at ERCOT, echoed that sentiment Tuesday.

“It appears that a lot of the generation that has gone offline today has been primarily due to issues on the natural gas system,” he said during a Tuesday call with reporters.

As for solar, it can be impacted, but it's rather unusual for it to be. It has to be really cold or a really heavy snowfall, because the surface of solar panels generally are warmer than the surrounding area, meaning that snow generally melts off of it quickly. Also, solar panels are typically mounted at an angle, which induces snow to slide off of them. And even panels that are partially obstructed generate decent amounts of power. (Citation) Again, in practical use, this is a non-issue.

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