Friday, October 23, 2026

Fatal officer shooting

https://youtu.be/XCLiJ9JetSQ?is=hnLj4PRhI_cG8qEZ

What started as a routine shoplifter call quickly elevated to a legal gunfight when the suspect produced a concealed weapon. 

In this tragic confrontation, the known felon has deadly accuracy with only a few bullets, and the police, one after another, fire many shots that missed. There are many regrettable tactical mistakes. 

Key Tactical Mistakes:
Underestimating the Suspect's Threat Level.

Initial Assessment: The officers were responding to a report of a disturbance at a shopping center. While the suspect was known to be non-compliant, officers initially approached the situation as a routine property dispute rather than treating the individual as an immediately high-risk, armed felony suspect.  

Lack of Early High-Risk Protocols: The approach lacked pre-contact staging or distance preservation before attempting physical control.

Proximity and Spatial Management (Tactical Isolation)

Closing Distance Too Quickly: The officers moved into immediate physical range to effect an arrest without establishing clear cover or controlling the suspect’s hands first.

Reactionary Gap: By closing the distance rapidly in an open parking lot environment, they eliminated their reactionary gap—leaving almost no time or space to react when the suspect unexpectedly drew a concealed firearm.

Inadequate Threat/Hand Identification Prior to Contact
Failure to Secure Hands: Standard law enforcement tactics emphasize securing or controlling a subject's hands before attempting physical restraint. The suspect managed to draw a concealed weapon from his waistband or clothing without warning and open fire at point-blank range.

Lack of Immediate Cover in an Open Environment: The initial confrontation occurred in an open parking area where options for hard cover (engine blocks, structural pillars) were either not utilized or unavailable. When the gunman drew his weapon, both officers were completely exposed with no physical barrier to absorb fire.

Crossfire and Backstop Vulnerabilities
During the Initial Response:
Positioning: The officers' relative positioning during the attempt to grab or cuff the suspect made crossfire or mutual obstruction an issue during the sudden transition to lethal force.

For interest, here's what Claude AI said about the above conclusions. 
Calling something a "mistake" after a fatal outcome is hindsight bias. Officers regularly make hands-on contacts like this, and nearly all end without a shooting. Most of what Gemini wrote isn't backed by anything I found, and it reads as confident hindsight rather than findings. [The claims that] they closed distance too quickly, that they failed to control his hands, or that they skipped cover. No published review, department statement or investigation says any of this. Gemini also doesn't cite a source.

Is an officer automatically put on administrative leave after they fire their gun? 

If the officer returns fire or discharges their weapon—regardless of whether anyone was hit—standard department policies almost universally require taking the officer off active street duty immediately. 
[Even if they did not fire their gun but were shot at,] The agency or officer may opt for a short period of administrative time off or psychological debriefing to process the trauma. However, removal from street duty is generally not mandatory.
Before returning to active field duty following a gunfire incident, officers typically go through:  

Psychological Clearance / "Fitness-for-Duty" Evaluation: A licensed mental health professional evaluates the officer to ensure they are mentally and emotionally cleared to handle active policing.

Internal Review Clearance: Investigators verify that the officer’s actions complied with department use-of-force policies.

Do police officers who've been shot at have subsequent impaired judgement in use of lethal force?

Research in occupational psychology, cognitive neuroscience, and police science shows that exposure to life-threatening trauma impacts subsequent decision-making. 

Officers who suffer PTSD often experience perceptual hypervigilance (Fewer Cues, Faster Escalation) and are more likely to misinterpret benign movements (e.g., reaching for a cell phone) as a draw of a weapon.

Studies evaluating shoot/don't-shoot decision-making show that officers [with] post-traumatic stress exhibit a lower threshold for perceiving a threat as imminent, which increases the likelihood of "false-positive" errors (shooting an unarmed subject).
Brain mechanism: they suppress activity in the prefrontal cortex—the region responsible for executive function, impulse control, and critical analysis—while activating the amygdala (the brain's threat-processing center).

The other extreme can also happen - Hesitation:
An officer traumatized by a previous shooting—or by the intense scrutiny, administrative stress, and potential legal fallout following an officer-involved shooting—may hesitate during a subsequent legitimate threat.

Mitigating these responses. 
Modalities like Eye Movement Desensitization and Reprocessing (EMDR*) and specialized Cognitive Behavioral Therapy (CBT) are widely used to reduce hyperarousal and restore baseline cognitive function.

EMDR involves watching the therapists fingers waving slowly back and forth, similar to hypnotizing in popular culture, while retelling the event. I can just imagine how much officers would hate this "touchy-feely" treatment when they're trying to get back on duty. 

Wednesday, October 21, 2026

SR71 nose camera engineering challenge

https://youtube.com/shorts/9TwqQuA9LLs?is=gGvJCJ7oGd-cObrQ

Monday, October 19, 2026

Making tires from dandelions


Not your regular dandelion, but rather the Russian dandelion, which grows in temperate climates and marginal soils, whose roots contain 3% to 12% rubber by dry weight of high-molecular-weight cis-1,4-polyisoprene, making it chemically identical to traditional Hevea tree rubber. 


Sunday, October 18, 2026

Zero-click scam: Malware embedded in an ad you scroll pay and don't even click on.

https://youtu.be/oTNqhH4KzxY?is=enyHEjwjiSV6im8k


Elevator micro-adjustment when people get on board

How much micro adjustment (in mm) is needed in a 50-storey building when a dozen people get in?

In a 50-story building, an elevator car sitting at the bottom floor will stretch by approximately 51 mm (about 2 inches) when a dozen people step inside. Therefore, the elevator's micro-leveling system must winch the car upward by that exact distance to bring it flush with the building floor again.

• Added Load (P): 8,829 N (12 people averaging 75 kg each = 900 kg total mass x gravity @ 9.81m/s²
• Cable Length (L): 175,000 mm (Assuming a standard 3.5 meters per story over 50 stories, measured when the car is at the lowest level to evaluate maximum possible stretch).
• Number of Cables (n): 6 cables (A typical configuration for heavy high-rise cars).
• Metallic Cross-Sectional Area (A): ~60 mm² per cable (Based on a standard 13 mm / 0.5-inch elevator wire rope. Because cables are braided strands wrapped around a core, the actual solid metal area is roughly 45% of a solid cylinder's area): π(13/2)² x 45% = 60mm²
• Modulus of Elasticity (E): 85,000 N/mm²
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AI-intensive Alpha schools

https://youtu.be/SC69VqCjRoQ?is=nR_vQN2pa-z5EpkI

Ridiculously high tuition averages $52000 a year. 

AI teaching specifically tailored to the student's individual interests, tracks their engagement and alters methods accordingly 

Very few teachers on site - mostly tech grads and life coaches staffing the schools

Intensive student monitoring and recording even at home and when sleeping

Large donations by the founders to politicians who control school vouchers which funnel public funding to private schools


Saturday, October 17, 2026

Mesmerizing

https://www.instagram.com/reel/Dc30rOaM4EA/?psln=cHczeXdldXA1NDYw

Save massive energy finally with straighter larger tubing in municipal systems


Here's the short version: 
• About half of the world's electricity runs electric motors, and half of that motor torque drives fans and pumps.
• Friction Reduction: Narrow, twisting pipes create massive fluid friction. Straight, wide-diameter pipes cut friction by 86% or more.
• Downsized Equipment: When friction drops, the pumps and motors pushing the fluid can be shrunk significantly (often by 80–90%).
• Lower Costs: Redesigning the whole loop frequently lowers total capital costs (because smaller pumps and motors cost less) while paying for itself in under a year or instantaneously on new builds.

Weather forecasting keeps getting better


Overall, weather predictions have come a long way in recent decades. 

Forecasting skill increases by roughly one extra day of accuracy per decade. 

A 5-day forecast today is roughly as accurate as a 1-day forecast was in the early 1980s, and a 3-day prediction of a tropical storm or hurricane track today is more precise than a 24-hour forecast was 40 years ago.

I've often wondered how much forecasting has improved. This video emphasizes how granular or hyper-regional current predictions are getting using AI and massive amounts of data. 

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Thursday, October 15, 2026

Avoid car break-ins


Minimize, and hide valuables in spare tire compartment. 
Leave the glovebox open, turn any bags inside out to show they're empty, make it obvious you have no electronics in the car, and *put the rear seat in the flooded-down position so they can see the trunk is empty. 

World's largest electric aircraft just flew

14:27 of we can [build an airplane] that is lower emissions, lower cost, better quality of life — we should do it. 
3:10 jet engines are inefficient at taxiing, takeoff, and landing. For a short flight, [a jet] can burn 10% of it's fuel [load] taxiing. 
3:25 the segment [of aviation] of regional flights is really badly served by the technology we have today. 
3:32 half of all flights [flown today] are under 2 hours. 
5:49 if you're a founder... every time you need more capital, there needs to be something material, something [one] can touch, that you've made. 
8:10 [built-in redundancy] everything has to work,  even if everything goes wrong 
9:40 1 in 1000 flights gets diverted to another airport...you need 45 minutes of "loiter" and then [another 100 miles of range.]

Wednesday, October 14, 2026

AI makes a novel medical advance

https://youtube.com/shorts/FoifEkBtxkE?is=XDcNm5AHfh5L2avr

 AI was able to come up with a new hypothesis, and search for a drug that would make previously innocuous-seeming tumor cells "visible" to the immune system, without affecting normal cells. 

Sunday, October 11, 2026

How actors show emotion, and what directors do with masked actors do instead.

https://youtu.be/-gitexWSLlg?is=_yBEGNsI8OqIPW2Z

Excellent video with the perfect excerpt to illustrate each point. Clearly very well researched by someone knowledgeable. 
3:05 the Kuleshov effect - context imparts emotion to an identically neutral face

Thursday, October 8, 2026

Powerful long-range drones for military supply shipments

https://youtu.be/mXLGGZM_b50?is=XNbxlP_mYYRIqoOA

The capability of these military drones is growing in leaps and bounds, and the race is being fueled by the remarkably lower cost than moving goods by helicopter. And, 1:29 "according to the Navy, over 90% of logistics deliveries are under 50 pounds," so sending a helicopter is a huge waste. 

Tuesday, October 6, 2026

How to respond when someone has cancer

https://www.hiddenbrain.org/podcast/when-bad-things-happen-to-good-people/

Kate Bowler categorizes the harmful or unhelpful responses people give when faced with terrible news into the archetypes of "Teachers," "Solvers," and "Optimizers."
Instead of meeting suffering with simple presence, people in these categories try to manage their own discomfort by attempting to fix, explain, or improve the situation.

1. The Teachers
The Teachers look at someone else's tragedy and immediately try to find a lesson, blueprint, or a "silver lining" to explain why it happened.
• The Response: They offer platitudes like "Everything happens for a reason," "God is testing you," or "Think of what you are learning about yourself through this."
• The Reality: Bowler notes that this response forces a false sense of order onto chaos. It attempts to wrap a tragic situation in an educational bow, which ultimately minimizes the raw reality of the person's grief and makes them feel like their pain is just a homework assignment they need to master.

2. The Solvers (or Fixers)
The Solvers treat a person's crisis or illness like a practical puzzle that can be cracked with enough effort or information.
• The Response: They offer unsolicited medical, spiritual, or lifestyle advice: "Have you tried cutting out sugar, or eating more vegetables?" "You should look into this alternative treatment," or "If you just pray harder, things will change."
• The Reality: This response is driven by the fear that tragedy is random. By insisting there is a solution, the Solver protects their own illusion of control. The underlying—and damaging—message to the sufferer is that if they just try harder, they can fix their own tragedy, subtly placing the blame on them if things go wrong.

3. The Optimizers (and "Purpose Monsters")
The Optimizers are products of modern self-help and productivity culture, treating human beings like assembly lines that can be continuously upgraded.
• The Response: When hit with bad news, they immediately pivot toward tracking metrics, relentless self-improvement, or toxic positivity. They want to optimize your mindset, your morning routine, your step counts, or your macros to "outrun" the pain.
• The Reality: Bowler argues that optimization is a joy blocker. The culture of optimization insists that human agency is unlimited and that any physical or emotional limitation is a personal failure. In reality, human beings are breakable and dependent. Trying to "optimize" your way through a tragedy forces you to hoard positive vibes while running away from the necessary, messy work of feeling the pain all the way through.


What to Do Instead: True Presence
Bowler's work emphasizes that life is beautiful and terrible, and there is no cure for being human. When someone receives bad news, they do not need a lesson, a 5-step optimization plan, or an amateur solution. What they actually need is presence and love—people who are brave enough to sit with them in the muck of unpredictable reality without trying to clean it up.

What to say to someone falling with terrible news. 
At 39 minutes: "I will keep pace with your hope. I will hold your hope when you can't any longer. I won't turn away from the difficulty you're facing — to hold possibility but not be blind to reality." 

39:45 Optimism - the hope that there are still beautiful things ahead for the person. Hold on to a sense of self-continuity. (Vs blind optimism or toxic positivity that "You will be ok no matter what," which leads to not listening to your doctor, or leads to avoiding negative words that might create reality.) 

"Remain porous" - Charles Taylor (open to God, open to despair, open to reality.) More beautiful will come your way, and you'll spare yourself the delusion of having control over it. 
Modern "self" seals itself off from reality, trying to make meaning out of everything. Every dark chapter needs to be improved, to be a self-improvement project. 

This is why vitamin D deficiency is prevalent

https://www.facebook.com/share/r/18iL33gAiJ/

See the video that shows, through winter, the latitude above which the sun can't provide you any vitamin D. 

Sunday, October 4, 2026

Toxic tire dust is also a huge source of microplastics.

Today I learned that vehicle tires produce toxic dust that enters the air, rivers, and oceans spreading massive amounts of toxicity and is the largest source of ocean microplastics. 

One specific tire-rubber additive called 6PPD turns out to be uniquely toxic even at remarkably low levels in Coho salmon, specifically. 

It's the breakdown product of 6PPD into its quinone derivative when altered by ozone that is specifically toxic to Coho salmon at very low concentrations; Coho are about 800 times more sensitive than Chinook salmon. 

Several non-toxic replacements are being evaluated, and are mandated to replace the toxic compound before 2035. In the meantime, environmental agencies are relying on stormwater solutions like rain gardens and bioretention soils to trap tire particles before they reach salmon streams.



The estimated per capita emission from tires ranges from 0.23 to 4.7 kg/year, with a global average of 0.81 kg/year. The emissions from car tires (100%) are substantially higher than those of other sources of microplastics, e.g., airplane tires (2%), artificial turf (12–50%), brake wear (8%) and road markings (5%). Ref

Car tires are one of the single largest sources of microplastics in our environment, accounting for roughly 28% of all microplastics found in the world's oceans. Scientists refer to this pollution as Tire and Road Wear Particles (TRWP). Unlike standard microplastics (like a degrading plastic water bottle), tire microplastics are uniquely dangerous because they act as "toxic sponges." They are packed with chemical preservatives, heavy metals (like zinc and lead), and anti-cracking agents (like 6PPD). As the microplastics sit in the water or inside an organism's stomach, these toxic chemicals leach out into the surroundings. 

Another study suggested that microplastics specifically derived from tire dust accounts for approximately 78% of the total mass of ocean microplastics. Ref

Rainfall washes more than 7 trillion pieces of microplastics, much of it tire particles left behind on streets, into San Francisco Bay each year — an amount 300 times greater than what comes from microfibers washing off polyester clothes, microbeads from beauty products and the many other plastics washing down our sinks and sewers...a local rain garden was found to capture more than 90% of the microplastics before they reach the ocean. Ref





Preservative chemical from tires is uniquely poisonous to Coho salmon, who are exposed through road runoff of tire dust.

Several non-toxic replacements are being evaluated, and are mandated to replace the toxic compound before 2035. It's the breakdown product of 6PPD into its quinone derivative when altered by ozone that is specifically toxic to Coho salmon at very low concentrations; Coho are about 800 times more sensitive than Chinook salmon. In the meantime, environmental agencies are relying on stormwater solutions like rain gardens and bioretention soils to trap tire particles before they reach salmon streams.





Saturday, October 3, 2026

Darpa lift challenge

https://youtu.be/kXqXWcw-hSI?is=va--pTH9Q3OCg4Pu

Incredible story of last-minute changes, crashes requiring design changes, and down to the wire final attempts to get the 2nd prize in the darpa lift challenge which sought a drone to lift 4 times the drone's weight as well as navigating a mile-long course. It took incredible persistence with several major crashes right before deadlines. 

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