June 15, 2024

The Engineering of Duct Tape

Long story short: I sent this video to two of my Crack Correspondents©®™ and they both liked it so I figured I might as well share it with bojWorld©®™.

June 15, 2024 at 12:01 PM | Permalink | Comments (0)

Color Blind Test T-Shirt





June 15, 2024 at 08:01 AM | Permalink | Comments (0)

June 14, 2024

Reaction Time Test


This is a simple tool to measure your reaction time. The average (median) reaction time is 215 milliseconds, according to the data collected so far.

Free, the way we like it.

June 14, 2024 at 04:01 PM | Permalink | Comments (0)

All Possible Love To boj Comment Peeps

Screenshot 2024-06-14 at 10.19.32 AM

Above, the sidebar of boj's homepage at 10:22 am ET today.

If you click [in the sidebar, silly billy — not the reproduction above] on the various comments on the June 10, 2024 post "Seven things I've done once that I don't plan to ever do again," you'll find all manner of wonderfully wacky/crazy/dumb/dangerous things readers have done over the years.

I wish there were a way to let you hover the cursor over a comment in the sidebar and read the contents without having to scroll down to the original post or leave the homepage and go to the June 10 post's individual link.

June 14, 2024 at 12:01 PM | Permalink | Comments (0)

Book Repair Tape

Screenshot 2024-05-30 at 8.03.40 AM

Because Scotch tape is not what you want to be using on your rare first editions.

From the website:

Neschen filmoplast® P Paper Repair Tape

Transparent, tissue-thin Neschen filmoplast® P Paper Repair Tape mends all torn paper.

The acid-free, pH neutral adhesive won't yellow, flake off, or damage materials.

The tape is temporarily repositionable and, once set, it can be removed with mineral spirits.

Features and Details:

Permanent pressure-sensitive acrylic adhesive will not discolor

Opaque: best suited for areas without print or decoration

Perfect for hinging mats or making "T" hinges

ph neutral; tests at 9.1 unaged, 7.8 aged

0.75" wide

165 feet: $38.30.

June 14, 2024 at 08:01 AM | Permalink | Comments (0)

June 13, 2024

Helpful Hints from joeeze: A Better Way To Dry Sweaty/Wet Gloves

Being dumb, I waited until we had a run of weather in the 90s with bright sunshine and 100% humidity to clean up the debris that's piled up in my yard and outside my house over the past couple years.

I looked out the window one morning and thought, "This place looks like a dump."

To put off having to deal with the unpleasantness of sweat running into my eyes and a lot of effort, I decided to first clean up inside the house, which was equally messy.

Vanta, my cat, has no problem with clutter — doh! — but when you find yourself sneezing from all the dust bunnies and shmutz on the floor every time you get down on your hands and knees to find something, you finally have to say "Enough!"

But I digress.

Long story short: watch the video up top, in which I demonstrate my longtime default supine/prone position sweaty work glove placement over a floor vent and the revolutionary breakthrough that vertically rotates them 90° onto their open ends and dries the outsides far faster, since both sides are now exposed to moving air from the vent.

As always, my guiding principle: how can I accomplish the most with the least effort?

June 13, 2024 at 04:01 PM | Permalink | Comments (2)

Spectacular 2,300-Year-Old Gold Ring Discovered in Jerusalem


From jns.org:

Discoveries at the site "are beginning to paint a new picture of the nature and stature of Jerusalem's inhabitants in the Early Hellenistic Period," said professor Yuval Gadot.

A gold ring dating from the early Hellenistic period set with a precious stone was recently found in the joint Israel Antiquities Authority-Tel Aviv University excavation in Jerusalem's City of David.

The 2,300-year-old ring was discovered by Tehiya Gangate, a City of David excavation team member.

"I was sifting earth... and suddenly saw something glitter," she recounted. "I immediately yelled, 'I found a ring, I found a ring!' Within seconds everyone gathered around me, and there was great excitement," she said, adding, "This is an emotionally moving find, not the kind you find every day."

The ring was manufactured by hammering thin pre-cut gold leaves onto a metal base. Stylistically it reflects the common fashion of the Persian and Early Hellenistic periods, dating from the late 4th to early 3rd century BCE and onwards.

Said Gadot, "Whereas in the past we found only a few structures and finds from this era, and thus most scholars assumed Jerusalem was then a small town, limited to the top of the southeastern slope ("City of David") and with relatively very few resources, these new finds tell a different story: The aggregate of revealed structures now constitute an entire neighborhood."

"They attest to both domestic and public buildings, and that the city extended from the hilltop westward. The character of the buildings — and now of course, the gold finds and other discoveries — display the city's healthy economy and even its elite status," he said.

"It certainly seems that the city's residents were open to the widespread Hellenistic style and influences prevalent also in the eastern Mediterranean Basin."

June 13, 2024 at 12:01 PM | Permalink | Comments (0)

North Face x Kilim


When it appeared in 2010 it cost $300.

Screenshot 2024-05-30 at 9.38.23 AM

That's $430 in today's money.

June 13, 2024 at 08:01 AM | Permalink | Comments (0)

June 12, 2024

Meta Stories Glasses Hack: Occluding Non-Dominant Eye Improves Video Framing

I love Meta Stories glasses because they let me make videos with both hands free, something that's important to me because I like to demonstrate things.

Since inception I've been annoyed by my inability to properly center my subject: far too often, part of the field is outside the video frame.

I noticed that when I close my right (non-dominant*) eye, what I see with my left eye is much more congruent with the subsequent video (the embedded camera is at the upper outside corner of the right lens).

I taped a small piece of opaque black construction paper atop the right lens so I don't have to think about closing my right eye while I record, and now videos show what I see.

Up top, a video shot on my iPhone because I'm demonstrating my Meta Stories glasses hack.

*"How to Find Your Dominant Eye"

June 12, 2024 at 04:01 PM | Permalink | Comments (0)

Wind Phone


[Wind phone in May 2018, before the inauguration of the newer aluminum booth.]

From Wikipedia:

The wind phone (風の電話kaze no denwa) is an unconnected telephone booth in ŌtsuchiIwate Prefecture, Japan, where visitors can hold one-way conversations with deceased loved ones.

Initially created by garden designer Itaru Sasaki in 2010 to help him cope with his cousin's death, it was opened to the public in the following year after the 2011 Tōhoku earthquake and tsunami killed over 15,000 people in the Tōhoku region.

The wind phone has since received over 30,000 visitors.

June 12, 2024 at 12:01 PM | Permalink | Comments (0)

Boil Alert Pot Watcher

Screenshot 2024-05-26 at 11.58.44 AM

I need this.

I heat water for Asian noodles at the highest range setting and inevitably it boils over while I'm not paying attention, doing something close to nothing (but different than the day before).

Screenshot 2024-05-26 at 11.58.38 AM

From websites:

Prevents water, milk, or cream from boiling over on range top.

Use with ramen, pasta, eggs, potatoes and more.

Makes a gentle rattling sound on bottom of pan as water begins to boil.

Put this heat-resistant glass disc in the bottom of your pot of water.

You will know the water's boiling when you hear the ring gently rattling.

Save on energy costs and time.

Features and Details:

Made of tempered glass

Safe and easy to use

Weight: 1.6 oz.

Hand wash

3.25" Ø

Screenshot 2024-05-26 at 11.58.23 AM


Not done with this item?

Want more?

Your wish is my demand.

Wait a sec — what's that song I'm hearing?

June 12, 2024 at 08:01 AM | Permalink | Comments (2)

June 11, 2024

Feynman's Garden

10602     1058

Published here on May 26, 2024 by Viktor Lofgren.

June 11, 2024 at 04:01 PM | Permalink | Comments (0)

LORIS — World's First Lightweight Free Climbing Robot

From New Atlas:

Rock-climbing robot climbs rough walls with active microspine grippers

Scientists have created a four-legged bio-inspired robot that climbs like no other. It clings to rough vertical surfaces utilizing a unique mechanism that is highly effective, yet at the same time relatively simple.


[The LORIS robot, pictured here scaling a concrete wall.]

One alternative involves using what are known as microspine grippers. These incorporate an array of tiny sharp hooks that snag small nooks and crannies in the surface being climbed. The hooks are released from that surface when the gripper is lifted off to take the next step up.

Some microspine grippers are passive, relying on the weight of the robot's hanging body to maintain a hold. This type works OK on relatively flat walls but struggles with more irregular surfaces such as cliff faces, which require a more varied climbing strategy.

Active microspine grippers get around this limitation by incorporating electric actuators that purposefully sink a ring of the hooks into the surface, maintaining a motorized hold that works in any direction. These tend to be bulky, energy-hungry and mechanically complex, however, plus they make for a fairly slow climbing speed.

That's where the LORIS quadruped robot comes in.


[LORIS was developed in partnership with NASA, with an eye toward the exploration of other planets.]

Named for a climbing marsupial — and also for the words "Lightweight Observation Robot for Irregular Slopes" — the device was created by Paul Nadan, Spencer Backus, Aaron M. Johnson and colleagues at Carnegie Mellon University's Robomechanics Lab.

At the end of each of the bot's four legs is a splayed microspine gripper, incorporating two groups of spines arranged at a right angle to one another. The gripper is connected to the leg by a passive wrist joint. This basically means that the gripper just flops around in response to whatever the leg is doing.


[Each of LORIS' microspines consists of a fish hook encapsulated in a 3D-printed plastic body.]

Utilizing an onboard depth-sensing camera and microprocessor, the robot strategically advances its legs in such a manner that when the gripper on one leg takes hold of the climbing surface, the gripper on an opposing leg – on the other side of the body, at the other end of the body – also does so.

As long as those two diagonally opposed legs maintain inward tension on their grippers, those grippers stay firmly attached to the surface. The robot's other two opposing legs, meanwhile, are free to take the next step upward. This is an insect-inspired climbing strategy known as directed inward grasping (DIG).


According to the researchers, LORIS combines the light weight, speed, energy efficiency and simplicity of passive microspine grippers with the firm hold and adaptability of active grippers. And as an added bonus, the robot is designed to be easy and inexpensive to manufacture.

Alex Honnold, call your office: your climbing partner has finally arrived.

June 11, 2024 at 12:01 PM | Permalink | Comments (0)

Bumper Stickers For Your Phone



Screenshot 2024-05-25 at 10.44.39 AM

Sticker Sheet Vol. 1 or 2: $10.


Sticker Bundle (Vol 1+2): $15.

June 11, 2024 at 08:01 AM | Permalink | Comments (0)

June 10, 2024

Most Common 4-Digit PIN Numbers


From Kottke:

According to the analysis, just 20 4-digit numbers account for 27% of all PINs: 1234, 0000, 7777, 2000, 2222, 9999, 5555, 1122, 8888, 2001, 1111, 1212, 1004, 4444, 6969 (nice), 3333, 6666, 1313, 4321, 1010.

The diagonal line is people using repeated pairs of digits (e.g. 2727 or 8888) while the horizontal line near the bottom is people who are presumably using their (19xx) birth year as a PIN. (You can see the beginning of a 20xx line on the left side.)

The best causally unguessable PINs would seem to be unrepeated pairs of numbers greater than 50 — so 8957, 7064, 9653, etc.

Choose wisely.

Chuffed that my PINs are not among the top 20 most common.

My Crack Tech Team©®™ continues to keep me clean.

June 10, 2024 at 04:01 PM | Permalink | Comments (0)

« June 12, 2024