Thursday, October 31, 2024

Women bosses - be nice, or be assertive?

 https://hiddenbrain.org/podcast/men-45-women-0/

"It is really the very, very fine line of being a shrew on one hand and a puppet on the other that any woman in public life has to walk," says former U.S. Sen. Carol Moseley Braun, a Democrat from Illinois.

So what's a woman to do? Be nice and kind and friendly, as our gender stereotypes about women require? Or be tough and decisive, as our stereotypes about leadership demand? To be one is to be seen as nice, but weak. To be the other is to be seen as competent, but unlikable."

https://hiddenbrain.org/podcast/how-to-win-people-over/

" an amazing and depressing study...looked at longitudinal data of 15 years about of professors teaching evaluations...you might think, oh, evaluations are going to get better for the people who succeed and stay because they'll become more experienced professors. And then, I don't know, maybe at the end of their career, they tail off and they get worse...When they were younger, they would get high evaluations. As they went into middle age, their evaluations would drop, and as they got older, their evaluations would rise again...women who got the lowest teaching evaluations...middle stage of their career, those women were perceived as the most assertive and the least warm...Because if someone's gonna have control over me, I care a lot about the fact that they are gonna do good things with it, not just to help me, but to make sure they're gonna use it responsibly. If I don't respect somebody, I could be concerned, and wait a second, you're gonna have all this control, and you're just gonna mess it up."

An antidote: "humor bragging is saying something positive about yourself, while also using humor that is not self-deprecating"

World's largest iron mine, Australia

https://youtu.be/F1bJYHl5iJw?si=KgW_bpadB5XySU6r

Largest iron mine profits from very little over-burden to be removed before encountering high-grade ore. Many of the mine's operations run autonomously, and trains ship out ore 365 days a year,

Wednesday, October 30, 2024

The surprising solutions to the world's water crisis with Hannah Fry

https://youtu.be/FDY2McKLvlM?si=OTflTWbMb1xOZdBF

7:12 "Practical Action" is drawing water up from aquifers using solar power, to sustain localized farming. 
12:39 a correlation between water depletion and social unrest. 
23:21 water is this issue of national security. Singapore had to teach rock bottom before they changed their approach to the importance of water. Let's hope the rest of the world learns how important water security is, and will continue to become. 



Monday, October 28, 2024

Take off shoes indoors - to limit exposure to micro plastics


"Finnish schools, shoes are taken off by coat racks near the classrooms (shoe schools). The new course of action is to take shoes off right when entering the building (sock schools)...concentrations in corridors were significantly higher in shoe schools compared to sock schools...elemental concentrations (Li, Al, Si, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd, Ba, Pb) in settled dust were also higher in shoe schools compared to sock schools" 

"Contaminants tracked in from outside, such as lawn pesticides and lead dust from work or home renovation: Use a doormat, remove shoes at the door, and plant shrubs and grass to help reduce dust levels and limit the potential to track dust indoors." 

"...estimated that between 9,000 and 400,000 metric tonnes of microplastics are released from shoes globally per year from regular use...trail running events deposit significant plastic fibres and rubber fragments onto soil...100 runners release about 425,000 rubber particles over a 10 km race...85% of used shoes in the UK were sent to the dump rather than recycled or reused...once they're in the landfill, shoe plastics degrade...and release ethylene and methane, two potent greenhouse gases" 

"We recommend not heating food in plastic containers, because chemicals leach from that plastic into the food product...placing plastic in the dishwasher can have a similar leaching effect by degrading plastic containers...[prevent exposure by] taking off your shoes when coming inside, to removing dust, and vacuuming frequently."


Friday, October 25, 2024

Faroe Islands tidal generators underwater kites


Small 1 MW tethered kites combined with battery storage to wean the insulated Faroe Islands off fossil fuel. 

What's the difference between "Internet" and "the Web"



2:48 "I know that people use the words web and internet interchangeably but they are actually different things the web that's the bit that you see on your screen it's the collection of pages the stuff that is is stored in vast data centers owned by companies like Google and Amazon the internet however that is the physical infrastructure it's the network of cables running over land and along the seafloor that literally link up one machine to another carrying huge volumes of data." 

Sunday, October 20, 2024

Getting Internet to remote impoverished people


Ok first of all, I didn't know the "Internet" and "web" are different things. 
2:48 "I know that people use the words web and internet interchangeably but they are actually different things the web that's the bit that you see on your screen it's the collection of pages the stuff that is is stored in vast data centers owned by companies like Google and Amazon the internet however that is the physical infrastructure it's the network of cables running over land and along the seafloor that literally link up one machine to another carrying huge volumes of data." 

This team is distributing local Internet data 10-20 km by beams of light, rather than radio waves. 5:30 The challenge turns out to be small wind-induced movements of the tower, 6:09 solved by tiny compensatory movements of a mirror, akin to video stabilization gimbals. 

Google's moonshot "X" program 7:38 operates at "the intersection of purpose and profit," solving such problems to reach 2:20 the last 3 billion people not connected to the Internet. 


Unfeasable cons of cons' fees



A frustrating accumulation of predatory fees keeps ex-cons forever in debt. 

6:08 "The justice system cannot sustain itself on the backs of poor families while also striving to rehabilitate people who have committed crimes. This failure exacts a toll on all of us." 

QR codes or "quick response" -a deep dive


Amazon hunting down counterfeiters

https://youtu.be/o_7XarmoDIw?si=RuoK5bdlNZa2Svxk


3:28 Amazon ends up paying $150 per seized item to deter counterfeiters. 

4:37 customers have a harder time detecting if his are counterfeit with online shopping because they can't see and touch them; clues are recently-launched sellers, and fewer reviews. 

6:46 the landscape changed in 2024 when a judge ruled that Amazon can't be "hands-off" when a product is fake, but has to take some of the blame, and recall defective goods. 

8:38 Amazon covers the cost of investigation and lawsuits, empowering small businesses to take on counterfeiters they wouldn't otherwise be able to tackle, financially. 

Saturday, October 19, 2024

Finland has: Mandatory education in detecting fraud/fake news


4:28 "So, critical thinking is a real priority here." 

7:00 "you have a right to your own opinion, but you don't have a right to your own facts." 

Reversing pump "battery" dam failure

This power plant is a net consumer of electricity, but it helps meet peak daytime demand. After pumping all night, and reversing during the day, out achieves
2:56 overall 70% efficiency

10:12-12:50 A combination of human errors led to the failure in this unmanned system: not accounting for wall settlement, dislodged water-level sensors, backup water-level sensors placed on the highest portion of the wall, and no human confirmation of water levels monitored by these systems. 
12:50 "unfortunately, when you rely on complicated systems for safety, the likelihood of failure goes way up." 

Transform abandoned hotels into subsidized housing


Monday, October 14, 2024

DIY engine control modules


This guy seems really incredible to me, programming electronic control units for fuel injection himself, to not only revive old engines but make them more fuel efficient and powerful. 

What's "Eggs Halifax?"

Wow, this journalist went down a convoluted rabbit-hole in search of the origin of eggs Benedict with smoked salmon sometimes taking on the name "Eggs Halifax." 
Although there's no definitive answer, it could get well get its name from Halifax, NS. 

Being ok with Uncertainty

This podcast explains so much about human nature, politics, and conspiracy theories based on whether our brain is wired as prey or predator. If you want to skip past the researcher's personal history to the meat of the episode, start at 23:32. 

Dividing people into those who 1) have a need for closure vs 2) are ok with uncertainty turns out to be much more useful than the classic "type A vs B" archetype. This affects everything in our lives - whether we like abstract art, are prone to like conspiracy theories, what political party we lean towards. 
To me, it also explains why politicians will lean into bizarre things like scaremongering of transgender surgery happening in schools, immigrants eating cats and dogs, and immigrants being rapists and murderers. 


From the transcript
"our brains are wired to make sense of the world. You know, we are sense-making animals. And each of these traits in some way speaks to our drive to make sense. How quickly do we need to make sense of the world? How much are we willing to live with uncertainty? This difference turns out to have ramifications in all kinds of different areas. One of the areas that you have looked at and others have looked at is in our appreciation of aesthetics." 

"conspiracy theory beliefs are really rooted in a very simple causal mechanism. They say that whatever the crisis is, or the horrible event is, it's not some complex systemic thing. It is something that has been caused by powerful people operating in the shadows to benefit themselves and harm others. And it provides a really quick closure to what could be a complex problem...what you're looking for is, I'm dealing with a situation of high ambiguity, high uncertainty, and if I can just locate the culprit that's responsible for all of this, in some ways it moves you from that world of uncertainty to a world of predictability and closure." 

"I think about need for cognition as something that's a bit of a luxury. Because if you're high in need for cognition, it signals that you have the time, you feel that you have the time and security to be able to dedicate to thinking about something for a long period of time. Having high need for cognition is actually correlated with people who are less likely to be monitoring their environments for threat. If you're not monitoring for threat, and you're not looking around the corner to see who's lurking, you can just, you know, I call it cud-chewing. You can chew your cud all day." 

"people who enjoy thinking about things, and you know, really kind of struggling to solve problems, these are the same people who really enjoy abstract art and syncopated jazz, for example, over really predictable, like pop music or country music, that has a more predictable cadence, chorus, and verse structure." 

"people who enjoy thinking actually are less likely to be persuaded by more emotional or heuristic kind of appeals. They require evidence-based argumentation to be persuaded by information."

"I think about this in terms of how people monitor for threats in their environment. And when I think about it that way, it actually gives me sort of a unifying narrative that helps explain a lot of what's going on... It seems that individuals are born, perhaps genetically...predisposed, to have physiological systems that deal with threat in their environment. And that shapes physiological patterns, which then shape psychological tendencies. And for people who are high-threat monitors, they are all about survival in the face of threat, and it's on their mind all the time. What serves these people best is making decisions quickly and efficiently based on heuristics, emotions, intuition, and shortcuts. That is what causes them to have this lower need for cognition. It's not that they can't, it's that it doesn't make sense for them based on their sort of psychophysiological predispositions. Similarly, these are folks who, because they're monitoring for threat, of course they're going to want to be in situations that are highly certain, ordered, predictable. They're not going to be very high in tolerance for ambiguity because that exposes them to threat."

"In a survey, we looked at whether or not individuals who had higher or lower need for closure had different levels of support for transgender individuals. What we found is that even accounting for all these other things, need for closure is associated with more negative opinions of transgender people, transgender candidates, and transgender rights. And this is one of those things that is intuitive on its face. And when we thought about studying this construct, I just thought, you know, for folks who need for there to be a yes or no answer, black and white, it would make sense for these folks, the concept of gender fluidity or the concept of gender being a social construct, that I could imagine that that might be hard for them to reconcile. And sure enough, our results actually showed quite a robust effect of need for closure on these outcomes."




Wednesday, October 9, 2024

Criticism of Amtrak and Via rail


This well-illustrated critique of traveling in North America by train compared to Europe (where population densities are much larger) is quite a stark comparison - our rail system is expensive, slow, not prioritized relative to freight traffic, rough ride, and expensive with unnecessary charges and delays. Rail is much cheaper and environmentally friendly per mile. 

Wednesday, October 2, 2024

Are we running out of sand?


Sand is a complex material: It's not just beach sand, but a range of materials with different properties. (0:22)

Sand is essential for concrete: Concrete is a vital building material, and sand is a key ingredient. (3:19)

Sand is not evenly distributed: It's a non-renewable resource, and mining it can have environmental impacts. (4:49)

We can make sand: Crushing rocks can create manufactured sand, which can be more environmentally friendly and even stronger than natural sand. (5:09)

Sand shape matters: Rounded sand is easier to work with, but angular sand can make stronger concrete. (6:48)

• Workability vs. strength: Adding water to concrete makes it easier to work with, but weakens it. Rounded sand requires less water, leading to stronger concrete. (9:32)

The myth of dune sand: The idea that dune sand is unusable in concrete is a myth. (12:19)

Sand scarcity is misleading: The real issue is the cost of fans is increasing, due to environmental regulations and transportation costs. (14:27)

Concrete is a huge industry: The scale of concrete production leads to significant environmental and social impacts. (14:47)

Sand is not the only option: We can use recycled concrete aggregates and other materials to reduce our reliance on virgin sand. (17:11)

• Technology can change the game: Just like diamonds and timber, sand can be produced synthetically and sustainably. (15:30)

The video concludes that while the world is not running out of sand, we need to be more mindful of the costs associated with its extraction and use. (17:36)

Clever illusion - circle turns into square.

Interesting illusion: 


Ambiguous cylinder explained: 



Another explanation video: 

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