I used to have a sail boat. One of the most important #safety rules in sailing is "don't sail on a schedule".
What this means is that if you have a destination & a deadline, you will override safety signals (like weather) & travel in unsafe conditions due to deadline pressure. This is how serious accidents happen while sailing.
Planning for sailing puts an emphasis on having a checklist that includes having situational awareness of issues like boat condition, charts, & weather by explicitly checking the marine weather forecasts.
Also you have to be prepared to bail on your destination & schedule if the safety signals change. You have to know where your closest port is to seek shelter if a storm arises.
It occurred to me that the #airbornePrecautions equivalent is "don't be task focused on a deadline".
The need to get a task done by a deadline causes you to lose situational awareness, & accept risk that you would not otherwise accept if you thought your safety plan through ahead of time.
This is exacerbated by the total lack of a danger signal in society right now. No mitigations visible. Out of sight, out of mind.
This bit me yesterday getting a vaccination from an unmasked pharmacist in a small room. I took a risk I should not have, because I lost situational awareness under the drive to get the task done. I never would have accepted that risk in my pre-thought out safety plan. But it just popped up in the middle of the task, & I let it slide because I wasn't situationally aware.
Now, ofc I was wearing #P100#elastomeric so the risk here is relative. My event was ocular exposure during high water mark for community transmission, not being maskless. But it is not a risk I would have taken in a pre-thought through safety plan.
And that's the big deal now. Every little ordinary task needs a safety plan.
It's frustrating. It's exhausting.
When it goes wrong, when the safety signals change, when you get off plan, you have to be prepared to "bail". Halt a task, walk out, cancel, reschedule. Find a safe port in the new storm.
I should have refused entry with a maskless pharmacist. Cancelled, requested accommodation & rescheduled.
This is a kind of risk "velocitization" that happens. I am getting velocitized into one-way masking even during high #community#transmission periods. Everyone else but me unmasked is the new normal.
This is how accidents happen - a bunch of little issues leading to an unwanted, unplanned outcome.
Analysis of #SARSCoV2#transmission in #airports based on real human close contact behaviors, Journal of Building Engineering
> The average close contact ratio in 9 airport's areas is 25.4 % (ranging from 6.1 % to 55.0 %), with passengers having the highest frequency of close contact in manual check-in areas. During close contacts, the average interpersonal distance in airports is 1.2 m (ranging from 1.1 to 1.4 m), being shortest in boarding areas. Face-to-face close contact is highest in charging areas, with a percentage of 46.9 %. Dining areas have the highest virus exposure risk for both short-range inhalation and mucosal deposition, followed by manual check-in areas.
Very useful explainer posted by @dfisman. I’m am going to try and copy and paste it over here as it’s worth sharing and reading.
Going to be a bit bloody tedious as Bluesky doesn’t seem to allow copying of text. I have to “translate” it which opens it in a web page.. where I can copy the text😔
"Energy infrastructure in the North Sea: a time-sensitive international challenge."
My opinion article for #EUSEW, with learnings from the work that we did on a strategic vision for the upcoming Energy Infrastructure Plan for the North Sea.
Published by @cinea_EU - European Climate, Infrastructure and Environment Executive Agency today.
The transmission project is a “critical step forward as the state works to meet its ambitious climate mandates,” said Rich Dewey, NYISO’s president and CEO.
New #Fingrid CEO Asta Sihvonen-Punkka:
Today Finland has five 400kV #Transmission lines between windy north and consumers in south. In 10 years it will be eleven. #Uusiutua2024
In it, he speculates on what would happen if The Tower of Babel were completed. For those unfamiliar with the legend, it tells of a people who tried to build a tower tall enough to reach the heavens. The book talks about the people who live partway up the massive tower, unable to comprehend what life is like for those living on the ground.
In Chiang's tale, he mentions that it takes a cart laden with bricks several months to reach the top of the tower. And empty, lighter cart takes a month to make the opposite journey.
Being a short story, it doesn't delve to deeply into the workings of life at the top of a tower, but I thought it would be a fun exercise to think about what life would be like with such an asymmetric gap between sending and receiving a message.
Throughout most of human history, communication times have been roughly symmetric. It takes the same time to send a message from London to Edinburgh as it does to send a reply from Edinburgh to London.
Even in the Age of Discovery, when Europeans went pillaging the rest of the world, travel times were fairly consistent - albeit sometimes disrupted by storm, snow, or other natural disaster.
Our communications with Mars may have asymmetric bandwidth - but the latency in both directions is only limited by the speed of light. Well, that and how often the planets can see each other.
What would data transmission be like from the top to the bottom of this great tower?
Were the tower to be laid down across the plain of Shinar, it would be two days' journey to walk from one end to the other. While the tower stands, it takes a full month and a half to climb from its base to its summit, if a man walks unburdened. Tower of Babylon by Ted Chiang
For simplicity's sake, let's assume that the average person can walk a Marathon in a single day. So this tower would be around 84Km tall.
We can conclude that any message dropped from the top of the tower would probably take less than an hour to make an uncontrolled descent. Adding a parachute would increase the time taken - and may cause the message to drift off target - but would protect it from impact damage. It is safe to say that a message could be sent from the top of the tower to the bottom in much less time than the opposite direction.
What about uplink? The messengers are not climbing vertically - they're walking a spiralling passageway up the tower. A man burdened only with a scroll or messages could carry up a reply in 6 weeks - 42 days. Let's be generous and say an 84:1 ratio between uplink and downlink.
At first thought, this would seem to be the obvious solution. Place a pulley at the top of the tower - and raise the messages that way. This method of raising heavy loads was well known in ancient times. Sadly, it isn't as simple as that.
My first thought was that it would be possible to use semaphore and telescopes to achieve low-latency communications. The optical telescope wasn't successfully developed until the 17th Century. Even if basic optics were developed, it is likely that clouds and other atmospheric phenomena would impede reception of information.
What about audio? Shouting probably isn't going to be successful - but there are other ways to transmit sounds.
Mechanical telephony is fairly simple. You may be familiar with the tin-can phone - a length of string with a tin-can at each end. Although developed around the same time as the telescope, there is nothing fundamentally stopping mechanical telephones from being developed by any society with basic metalworking and rope-making skills.
Currently, the longest tin-can phone is around 200 metres. To climb the height of the tower would require about 400 relay stations - staffed with people to listen to the message, and then retransmit it to the next one.
Let's assume that it takes a minute to transmit a 10 second message to the next relay. That's still under 10 hours to get a message to the top of the tower. Practically instantaneous compared to physically carrying a scroll!
I am fascinated by the idea of how our history could have developed.
A few years ago, I wrote a post asking why the Romans hadn't invented semaphore. The development of an optical based "Internet" would have naturally led to the invention of a whole host of communications technologies.
Similarly, Ted Chiang's story touches on some of the inventions necessitated by building the tower - mostly structural engineering and agriculture.
Let's imagine what other technologies would have to be invented by a society who wished to communicate with those working at the top of such a tower.
Encryption - do you want every messenger in the chain to know what is being said?
Compression - if longer messages increase transmission time, how can a message be shortened and retain understood?
Error correction - how to ensure spoken or transcribed messages do not become garbled?
Routing algorithms - what if one link is broken, or if a message is intended for a specific destination?
Verifiability - has this message really come from its supposed author?
Multiplexing - what if we had two networks transmitting?
Acknowledgement - when do we need to ask for a retransmission?
Even if a mechanical telephone wasn't practical, communication would still require the development of several fields of science:
Aerodynamics - how do you guide something dropped from a vast height?
Parachutes - how do you slow descent? Not just for transmissions, but for people?
Nutritional science - how do you keep people in peak physical condition for climbing? A problem faced by the builders of the Pyramids.
Material science - how to keep ropes, pulleys, and other mechanical objects in good working order?
Animal breeding - is a small horse more economical than a human courier?
I'm sure you can think of many others.
What I find infuriating is that the majority of these scientific advancements don't require much physical technology. It is knowledge waiting to be discovered - requiring only a challenge to make it practical.
What advancements are just waiting to be found for want of a challenge?
Les presento mi próximo proyecto ñoño: Armar mi propio NAS
Voy a remplazar un Qnap de 2 discos por un sistema armado con 4 discos. Ya tengo el gabinete, fuente de poder, procesador, RAM, SSD (Reciclada de la que cambié en el laptop) y los discos duros los reutilizo del Qnap. Solo falta que me llegue la placa madre.
Voy a utilizar TrueNAS SCALE como sistema operativo.
The US urgently needs an expansion of the electric grid to move clean energy.
it's starting to happen.
"The US government is speeding deployment of more than $30 billion in federal support for #transmission projects.
In late October, the Energy Department announced commitments to purchase $1.3 billion worth of electric power from three multistate transmission projects, making the department the “anchor” tenant to help speed their construction."
Teaching the kid to drive, we've talked about manual and automatic transmissions (we only have automatic) and why it's needed with gas engines. I don't think he really gets it (or cares). When I made my EV, almost 30yrs ago, I'd left the manual transmission in, not knowing the range of operation the big DC motor and not needing reverse electrical relays. City driving I used 2nd gear all of the time.
NYISO picks $3.3B transmission project to deliver 3,000 MW of offshore wind power from Long Island [US] (www.utilitydive.com)
The transmission project is a “critical step forward as the state works to meet its ambitious climate mandates,” said Rich Dewey, NYISO’s president and CEO.
Breaking borders: The future of Europe’s electricity is in interconnectors (ember-climate.org)
Europe’s energy transition is accelerating and infrastructure must keep up, with a special role for cross-border interconnectors.