Likely a more logical setup would be a shape charge installed at the cable, which is triggered by a depth charge when needed. The complicated leg work happens over time, and you just drop the charge or fire a missile at a time of conflict.
I have no idea why people allow outside access to their NAS device or webcams. At a minimum, require VPN access, but ideally put them in a VLAN "jail".
Someone is going to need to get much more savvy when it comes to securing this "IoT" monster.
It is pretty hard to accommodate 25-50kW/rack in a building that isn't purpose-built as a data center. It is pretty hard to get the economies of scale associated with 24x7 staffing under a certain size. These are the challenges that push small data centers out and into co-lo facilities.
Rural data centers can be very hard to work with. Also, lake-effect snow can have a pretty big impact on electrical reliability. Very cold weather is not great for generators either, so you end up with a location that has high power risk and therefore high overall risk.
That isn't exactly true; they can be very quiet (outside the room/enclosure), but it takes pretty much work to get an enclosure down to 65dBA at 21'. For a 2MW engine, you need about 7' sound traps on intake and exhaust, plus a way to keep the combustion exhaust pipe from having any reflected noise hitting a sensitive area. (Direct engine exhaust is about 85dBA with the best silencer you can buy.)
What is hardest on people is that they are generally tested at night, and when they run they often do so for long periods of time. Working inside the generator room is very stressful, as the low-frequency noise is really penetrating.
All of these challenges can and have been solved before. The problem is that it adds cost. Equinix has a nice facility in south San Jose that did a good job addressing potential sound concerns; it has 30' high precast concrete walls around the generator enclosure, places most of the mechanical equipment on the roof, but keeps noisy equipment on the far side of the building from residential areas. The facility pre-dates the need for Tier-4 emissions controls, and a few more things could have been done to improve the impact on neighbors, but generally a responsible modern design.
In contrast, many 70's-era data centers were designed to withstand major civil unrest, nuclear fallout, and just about anything else. Nobody knew when their 6MW turbines were running, and the same went for the cooling towers and chillers. This requires a very specialized design, and places all equipment indoors. Today most of the facilities are commodity designs, and some even have freaking wood roofs!
Placing these facilities in the heart of an urban mixed-use area is hard if you want to be a good neighbor-- and costs nearly twice as much to do effectively for a Tier IV data center.
580,000 liters is only really a lot in a single above-ground tank, but based on your read I agree that it isn't the primary issue. (It is only ~200MWh of fuel.)
As for noise, would they really not have an ordinance on acceptable noise levels at the property line? (In the US) violating that ordinance can get you shut down quickly. 50dBA at the property line continuously though is quite annoying, especially in the higher pitches of a chiller.
In the US, the rules for noise and emissions from generators are generally pretty solid. If the summary is correct, their complaints are more noise and *quantity* of diesel storage on-site. The quantity shouldn't be an issue, although in the US we would generally try to use ballistic tanks if close to the property line or any sensitive locations.
Noise can be a couple things-- cooling towers too close to the property line without any acoustic treatment, air cooled chillers without an acoustic screen wall... but the most annoying one is a procedural issue of testing (or operating) the generators in early morning hours.
I had a project where we had a lynch mob ready at the gates while we were running a generator for 8 hours starting at 8AM on a Saturday. Never put a critical facility close to a wealthy neighborhood...
To-date he has saved less than $200 by his own math. From here forward he is "saving" almost $2k per month, but he could save half that without the penalty. Half the money could have been saved sharing a studio.
Well, after actually reading some of his posts I have to change my opinion: He is an idiot. If he can rent a studio in Mountain View for $2,100 and is willing to share it then his solution just doesn't have any net benefits. My current zillow-fu shows a 450SF unit for $1850/month, so he could have similar comfort sharing with two other people at $600/month, or an improvement in lifestyle for $925/month. Under $2k, you can still get as much as 750SF.
Unfortunately, many of the people find San Francisco an attractive location to work, compared to say Detroit.
If I were 23, I would likely do the same thing compared to paying $2k/month for a shared bedroom. Hell, I did live in a Hostel the first month I was there. I would likely push for a Sprinter rather than a box van, but his decision is likely more rational. If you can handle it for two years, you save up a good chunk of change. If you go with something that is "fun" to live in, and get out of the city and explore when you are off then all the better.
For the social suicide aspect, you can always time-share a place with others, but you pretty much have to resolve yourself to having a significant other with their own place or being single for the duration plus a social readjustment phase afterwards...
Like the MP3 player, an e-ink device is a niche application and will always exist, even when other devices can integrate other functions for the masses.
The eventual direction will be real-time pricing, where batteries will be very effective. Right now though, Orange County has a power deficit which means any tricks the utility company can pull off help stabilize things.
Real-time pricing will eventually make the hours between 1-2 hours before sunset and 8-9PM be most expensive. This will kill the PV incentives.
The reason there are incentives for Orange County is the decommissioning of San Onofre nuclear power plant. That area is now short peak capacity especially, but also base load to a degree. The transmission lines out of San Onofre primarily feed to Orange County and don't have nearly as much import capacity.
Batteries are cost effective at $200/kW. I assume the incentives cover the delta in cost. Chilled water or ice thermal storage is much cheaper, but Irvine Company has a lot of buildings without chilled water systems (although not so much in that particular area).
It is an inefficient solution though; on-site generation would be much more cost effective and energy efficient.
Those don't help much. Paying for something doesn't do anything to guarantee you aren't being "spied" on.
The better goal is to become a low-value target and increase the cost of marketing to you. Use ad blocking, and when you do see ads, just click on them. Click around on the site a little bit, and happily close the tab and get on with your life. Try to do so while reciting how much you hate advertising scum and all kinds of negative thoughts while on the advertiser's pages to make sure any association with their brand is negative.
Focus on the ad block though. If they can't display an ad to you you don't have much value to them.
For me, there are 4-5 news sites I visit regularly that all push for subscriptions. $5/month each starts to be obscene if it isn't your only go-to source for information.
To be honest, I think it has more to do with page load times for most. The ads might be intrusive, but now with adblocking on my iPad pages load quickly, even with spotty Internet. The bidding game the advertisers were playing is a big part of their downfall.
The tracking does have its "creepy" factor, with ads following you from site to site... Despite having already made whatever purchase was under consideration.
Arguably the most effective learning experiences are co-ops of 6-12 months minimum duration. The best I have seen is 2 years with a partial course load in addition (full time work in the summers).
What I can't really speak to is if (on average) an 18-20 year old is better equipped to succeed than a 20-22 year old. My personal experience was that the older student was better in the workplace climate, while the younger students would be able to absorb lots of information, but not always the critical application of the information. Not enough young 'uns though to really speak to trends.
It is actually done that way due to the LEED certification process for green buildings; parking spots for carpools, low emitting vehicles, and EVs need to be prime spots. Electrically they are a pain because they are 40A at 208V, which makes provisions for more than three a bit of a challenge; 480V units would be much easier to accommodate.
The shortage is just a timing issue; chargers will catch up. The problem really is that many employers provide them for free.
More likely, a city will have the wrong infrastructure rather than it being "too much." Infrastructure has to be built for peak actual or anticipated loads. When a neighborhood goes from a high population density to abandoned, you do end up with too much. Unfortunately, neighborhoods are rarely 100% abandonded, so you still need to serve the people that are left.
Is it cheaper to convert a 4-lane road to a 2-lane road rather than fix the potholes? (It might be for bridge repairs, or water mains at end of life.) these things require major investment, and the money just isn't there.
I hope Detroit uses the app to actually gain revenue from other communities-- selling the service and customization. It sounds like they have a much better solution than many other cities.
Slashdot Mirror
Likely a more logical setup would be a shape charge installed at the cable, which is triggered by a depth charge when needed. The complicated leg work happens over time, and you just drop the charge or fire a missile at a time of conflict.
The backup cooling is a gravity fed system, once-through. The goal is simplicity for an emergency operation.
Anything more complex is really just duplicating the primary cooling system.
I have no idea why people allow outside access to their NAS device or webcams. At a minimum, require VPN access, but ideally put them in a VLAN "jail".
Someone is going to need to get much more savvy when it comes to securing this "IoT" monster.
Problem is 9:30AM on a weekday is a high-risk/high-volume period where the SLA impact can be more substantial-- it is called a "Maintenance Window."
It is pretty hard to accommodate 25-50kW/rack in a building that isn't purpose-built as a data center. It is pretty hard to get the economies of scale associated with 24x7 staffing under a certain size. These are the challenges that push small data centers out and into co-lo facilities.
Rural data centers can be very hard to work with. Also, lake-effect snow can have a pretty big impact on electrical reliability. Very cold weather is not great for generators either, so you end up with a location that has high power risk and therefore high overall risk.
That isn't exactly true; they can be very quiet (outside the room/enclosure), but it takes pretty much work to get an enclosure down to 65dBA at 21'. For a 2MW engine, you need about 7' sound traps on intake and exhaust, plus a way to keep the combustion exhaust pipe from having any reflected noise hitting a sensitive area. (Direct engine exhaust is about 85dBA with the best silencer you can buy.)
What is hardest on people is that they are generally tested at night, and when they run they often do so for long periods of time. Working inside the generator room is very stressful, as the low-frequency noise is really penetrating.
All of these challenges can and have been solved before. The problem is that it adds cost. Equinix has a nice facility in south San Jose that did a good job addressing potential sound concerns; it has 30' high precast concrete walls around the generator enclosure, places most of the mechanical equipment on the roof, but keeps noisy equipment on the far side of the building from residential areas. The facility pre-dates the need for Tier-4 emissions controls, and a few more things could have been done to improve the impact on neighbors, but generally a responsible modern design.
In contrast, many 70's-era data centers were designed to withstand major civil unrest, nuclear fallout, and just about anything else. Nobody knew when their 6MW turbines were running, and the same went for the cooling towers and chillers. This requires a very specialized design, and places all equipment indoors. Today most of the facilities are commodity designs, and some even have freaking wood roofs!
Placing these facilities in the heart of an urban mixed-use area is hard if you want to be a good neighbor-- and costs nearly twice as much to do effectively for a Tier IV data center.
580,000 liters is only really a lot in a single above-ground tank, but based on your read I agree that it isn't the primary issue. (It is only ~200MWh of fuel.)
As for noise, would they really not have an ordinance on acceptable noise levels at the property line? (In the US) violating that ordinance can get you shut down quickly. 50dBA at the property line continuously though is quite annoying, especially in the higher pitches of a chiller.
In the US, the rules for noise and emissions from generators are generally pretty solid. If the summary is correct, their complaints are more noise and *quantity* of diesel storage on-site. The quantity shouldn't be an issue, although in the US we would generally try to use ballistic tanks if close to the property line or any sensitive locations.
Noise can be a couple things-- cooling towers too close to the property line without any acoustic treatment, air cooled chillers without an acoustic screen wall... but the most annoying one is a procedural issue of testing (or operating) the generators in early morning hours.
I had a project where we had a lynch mob ready at the gates while we were running a generator for 8 hours starting at 8AM on a Saturday. Never put a critical facility close to a wealthy neighborhood...
To-date he has saved less than $200 by his own math. From here forward he is "saving" almost $2k per month, but he could save half that without the penalty. Half the money could have been saved sharing a studio.
Well, after actually reading some of his posts I have to change my opinion: He is an idiot. If he can rent a studio in Mountain View for $2,100 and is willing to share it then his solution just doesn't have any net benefits. My current zillow-fu shows a 450SF unit for $1850/month, so he could have similar comfort sharing with two other people at $600/month, or an improvement in lifestyle for $925/month. Under $2k, you can still get as much as 750SF.
Unfortunately, many of the people find San Francisco an attractive location to work, compared to say Detroit.
If I were 23, I would likely do the same thing compared to paying $2k/month for a shared bedroom. Hell, I did live in a Hostel the first month I was there. I would likely push for a Sprinter rather than a box van, but his decision is likely more rational. If you can handle it for two years, you save up a good chunk of change. If you go with something that is "fun" to live in, and get out of the city and explore when you are off then all the better.
For the social suicide aspect, you can always time-share a place with others, but you pretty much have to resolve yourself to having a significant other with their own place or being single for the duration plus a social readjustment phase afterwards...
Like the MP3 player, an e-ink device is a niche application and will always exist, even when other devices can integrate other functions for the masses.
The eventual direction will be real-time pricing, where batteries will be very effective. Right now though, Orange County has a power deficit which means any tricks the utility company can pull off help stabilize things.
Real-time pricing will eventually make the hours between 1-2 hours before sunset and 8-9PM be most expensive. This will kill the PV incentives.
The reason there are incentives for Orange County is the decommissioning of San Onofre nuclear power plant. That area is now short peak capacity especially, but also base load to a degree. The transmission lines out of San Onofre primarily feed to Orange County and don't have nearly as much import capacity.
Batteries are cost effective at $200/kW. I assume the incentives cover the delta in cost. Chilled water or ice thermal storage is much cheaper, but Irvine Company has a lot of buildings without chilled water systems (although not so much in that particular area).
It is an inefficient solution though; on-site generation would be much more cost effective and energy efficient.
Those don't help much. Paying for something doesn't do anything to guarantee you aren't being "spied" on.
The better goal is to become a low-value target and increase the cost of marketing to you. Use ad blocking, and when you do see ads, just click on them. Click around on the site a little bit, and happily close the tab and get on with your life. Try to do so while reciting how much you hate advertising scum and all kinds of negative thoughts while on the advertiser's pages to make sure any association with their brand is negative.
Focus on the ad block though. If they can't display an ad to you you don't have much value to them.
For me, there are 4-5 news sites I visit regularly that all push for subscriptions. $5/month each starts to be obscene if it isn't your only go-to source for information.
To be honest, I think it has more to do with page load times for most. The ads might be intrusive, but now with adblocking on my iPad pages load quickly, even with spotty Internet. The bidding game the advertisers were playing is a big part of their downfall.
The tracking does have its "creepy" factor, with ads following you from site to site... Despite having already made whatever purchase was under consideration.
It is simply the us price converted to aud, plus GST. The Aussie dollar has dropped from parity to 0.75/USD.
Is the re-install just required for employee-owned devices? I thought it was more transparent, at least for company devices.
Arguably the most effective learning experiences are co-ops of 6-12 months minimum duration. The best I have seen is 2 years with a partial course load in addition (full time work in the summers).
What I can't really speak to is if (on average) an 18-20 year old is better equipped to succeed than a 20-22 year old. My personal experience was that the older student was better in the workplace climate, while the younger students would be able to absorb lots of information, but not always the critical application of the information. Not enough young 'uns though to really speak to trends.
It is a space issue; you have more bulky equipment at the car chargers. For a group of over 6-10 chargers it is economically justifiable.
It is actually done that way due to the LEED certification process for green buildings; parking spots for carpools, low emitting vehicles, and EVs need to be prime spots. Electrically they are a pain because they are 40A at 208V, which makes provisions for more than three a bit of a challenge; 480V units would be much easier to accommodate.
The shortage is just a timing issue; chargers will catch up. The problem really is that many employers provide them for free.
More likely, a city will have the wrong infrastructure rather than it being "too much." Infrastructure has to be built for peak actual or anticipated loads. When a neighborhood goes from a high population density to abandoned, you do end up with too much. Unfortunately, neighborhoods are rarely 100% abandonded, so you still need to serve the people that are left.
Is it cheaper to convert a 4-lane road to a 2-lane road rather than fix the potholes? (It might be for bridge repairs, or water mains at end of life.) these things require major investment, and the money just isn't there.
I hope Detroit uses the app to actually gain revenue from other communities-- selling the service and customization. It sounds like they have a much better solution than many other cities.