Saturday, October 3, 2026

Some Organizations Should Remember Lincoln's Remarks About Appearing Stupid

 “Tis better people think you a fool, then open your mouth and erase all doubt.”

10/15/20 NBC San Diego:

Students will no longer be graded based on a yearly average, or on how late they turn in assignments. Those are just some of the major grading changes approved this week by California's second-largest school district.

The San Diego Unified School District (SDUSD) is overhauling the way it grades students. Board members say the changes are part of a larger effort to combat racism.

“This is part of our honest reckoning as a school district,” says SDUSD Vice President Richard Barrera. “If we’re actually going to be an anti-racist school district, we have to confront practices like this that have gone on for years and years.”

According to data presented by the district, under the old grading system, teachers fail minority students more than White students – a lot more.

During the first semester of last year, 30% of all D or F grades were given to English learners. One in four, 25%, of failing marks went to students with disabilities.

By ethnicity, 23% went to Native Americans. Another 23% of failing grades went to Hispanics. And 20% of D or F grades went to Black students.

By comparison, just 7% of failing marks went to White students.

Because turning papers on time is so white. 

Some Family History From My Sister Carolyn That You Might Find Interesting

 ROOT BEER IN GRANNY’S BATHTUB

 by Carolyn Cramer Goldwasser Oct. 1, 2026

 Yes, I got to help my Granny Annie Langley Naylor make and bottle root beer. I was 8 years old in 1950 and she was 65 years old. She did things in an old fashioned (even for then) kind of way. Her cook stove was a huge cast iron, woodburning stove, (meaning the heat to cook on the top and in the oven came from pieces of wood burning inside one end of it). Out of the top of the other end of it rose a curved shiny metal smokestack that fitted tightly into a hole in the actual brick chimney, thru the kitchen side of the wall. Next to the smokestack was a cast iron shelf on which a very big tea kettle sat, keeping water hot.

 On the living room side of the wall, there was a heater which burned “fuel-oil”.  It was about two feet away from the wall and it had a similar smoke- stack that fitted into a hole on the other side of the same chimney. All the smoke and fumes from both stoves went out of the brick chimney (which extended several feet above the top of the roof) up into the sky.

 I don’t think there was a separate water heater in that house. But there was plumbing, and cold water would flow into the kitchen sink, bathroom sink, and bathtub. The water in the kettle above the cook stove was always hot, so granny would grab it and pour some hot water into the cold water in the tub to warm it up enough for us kids to take a bath. Only on Saturday nights we got baths. Other times we washed in the sink, with less water.

 So how did we make Root Beer? First, you save the glass soda bottles from last year. Then you gather or buy roots (from which the name root beer comes). Wintergreen is the only root I remember granny naming, but it seemed to me there were several different kinds of roots involved.  She roasted and boiled the roots to make a dark brown liquid in a giant pot. Then she added a big bag of sugar and boiled it some more.

 She did tell me how they had dug and roasted chicory roots to make “coffee” during the Depression – chicory is bitter, and so is dandelion root, which they may have used for the root beer as well as for the “coffee.”

 So, then the bathtub was scrubbed clean and rinsed well.  The stopper was securely put in place and several gallons of the dark brown, warm sweet liquid were poured into the tub to ferment for a week or so.  She stirred it every day watching for bubbles to form when it was ready. The root beer got the bathtub. It was summertime, warm weather, no school, no baths. Warm weather all day and all night was needed for the fermentation to proceed properly. So we made root beer in summer.

 Next step: last year’s glass bottles were put in the giant pot covered with water and slowly brought to a boil, to be sterilized.  They then cooled, in the water. A funnel and a ladlecargol helped us fill the sterile bottles, as we sat on thick towels on the bathroom floor.

 We moved to the kitchen table and the heavy steel bottle capping tool was brought out, as were the many thin discs of soft metal that would become lids for the bottles.

 The bottling tool worked with a handle on a lever, which we older kids could pull down, to exert force onto the top of the metal disc, which we had set on top of the full bottle; the bottle was held securely in place below the lever, by a clamp, which was a part of the boxy form of the tool.  The soft, thin metal disc was forced over the top of the bottle, bending into a bunch of evenly spaced little crimps around the edges, holding it securely onto the top of the bottle, keeping the liquid and the bubbles inside for many months. 

 Root beer has no alcohol content. It is bitter and sweet and fizzy and it was considered healthier than regular beer with alcohol in it. And kids could drink it!  My grandparents were members of the Salvation Army and were against alcohol. My mother was an officer in the Salvation Army before she married my father. There were no alcoholic beverages in our house, ever.

 I think it is not a coincidence that after I was grown and married with kids, I studied and learned to make several kinds of fermented foods: including Kosher dill pickles (lots of bubbles, sour but without vinegar – just salt, garlic, dill and cucumbers), sourdough bread, raising without yeast; and Amasake, a drink. 

 Amasake is made from whole grain glutinous rice cooked soft, with extra water, and then fermented with koji (a fermentation starter), in a warm oven, for a couple of days, just long enough to let the starches (carbohydrates) in the rice chemically change into sugars. It gets stirred from time to time. The fermentation breaks down the skin of the whole grain, and it gets mushy and sweet. It can have a similar taste and consistency to a milkshake if it is pureed and chilled. I helped some macrobiotic folks at the Grainaissance mochi factory, near Berkeley, make amazake to sell, flavored with cooked fruits and nut butters. Yes, a good substitute for milk shake.

 Quickly stopping the fermentation (by boiling it) prevents the sugars from progressing to become alcohols. “Amasake” means Sweet Sake. If you let it ferment past sugars, then you have regular Sake – the Japanese alcoholic drink. 

 Miso and soy sauce are made with soybeans and grain, fermented in the presence of salt, which controls the fermentation.  The soy proteins become more accessible, being already partially digested by the fermentation process. Not just a flavoring, but they are good high protein foods. And they are an important part of a vegan macrobiotic diet.

 Miso and soy sauce are dark brown, like root beer. And here I am, many decades later, still involved with dark brown fermented foods!  Yesterday, I cooked my breakfast soup with miso in it. Today I flavored my breakfast porridge with a splash of soy sauce.  Thanks, Granny for teaching me how to cook and how to grow food in your garden. And for saying grace before every meal: “Bless this food to our bodies and make us grateful, teach us how to be kind and to help each other. Amen.”

 

 

 

Have You Seen This Joke?

Only in Los Angeles can you go into night court and see someone charged with human sacrifice without the proper permit?

I think my memory says Fred Clark, 1940s.

This Should Start Impacting Gas Prices Soon

10/3/26 BBC reports that oil exports from Persian Gulf are back to 92% of pre-war levels through combination of pipelines around Hormuz and U.S. escorts of tankers. 

Friday, October 2, 2026

Machining Nerd Time

 As I have previously discussed, the core of all machine tools is a 20 threads/inch leadscrew. One turn of the screw is 0.50". If you can narrow that down to 100 divisions, you can easily move pieces on that lead screw .01". This is beginning to get accurate for mildly precise work. But how do divide a circles into 100 equal divisions. Think back to the suffering of high school geometry. Dividing a circle in half is just drawing a line across the center point. Another diameter that crosses the center point gets you 4 divisions of 90 degrees. How do you get to 100 divisions? Even more useful, 360 divisions? I often think about having to rebuild civilization even without a 20 threads/inch screw thread. (Okay, not on your list of concerns.)

How do you get this capability if you lack a starting reference for 360 degrees. This has been bugging me for years. This video explains how it was done.

Short answer is that you use a worm gear to turn a wheel with a 40:1 gear ratio. Forty turns of the worm gear did one full rotation. One rotation was 9 degrees. Keep increasing the worm gear ratio to get finer divisions. The rotating table that I use with my Sherline mill uses this technique to get 0.1 degree divisions. Actually with some interpolation better than that!

When I was young, my father taught me how to use a caliper with a Vernier scale. I learned and forgot. Digital calipers are too easy to use and cheap, too! But how do they work? I have a slight inkling from using a Foucault tester for making a telescope mirror. It used a nomograph for allowing measurement of hundredths of an inch of movement. You make a nomograph by drawing a series of lines .1" apart in the X direction. Then you draw diagonal lines from left side of 0" to right side of .1". Now measure 1" wide line with .1" divisions on 0" line. Now draw lines from each .1" division to the last line along Y. 

This is an oversimplified version, not done very well using OpenOffice Draw:

Where the objects sits as you reach the point where the mirror edge exactly shows a proper paraboloid image, you look at where the knife edge intersects the diagonal. The magic of the Foucault tester is that a very simple set of parts lets you measure optical precision to millionths of an inch.

This video explains the math and history of the vernier scale:


I find myself wondering about use of vernier scales for angles (for which Vernier first developed the idea). Equatorial telescope mounts have an adjustment for the polar axis, which needs to be aimed at your latitude above the horizon in order track across the sky.


As you can sort of see, the degree divisions are necessarily not very fine. On smaller, cheap mounts, you are lucky to get 2 degree divisions. A vernier scale should make this much more precise, more precise than it really needs to be.


Thursday, October 1, 2026

Shop Coming Together

There were some cabinets in the wall that I had not bothered to open. When I did, they were ugly dirty. So I cleaned them out (spider webs, dead spiders, spider egg sacks). A number of items that so not regularly get used (a fine sander for example) will go in there getting space on the workbenches for power tools.  All the hand tools are now on pegboards. There is still some organizing needed.  

I have out together two of the Losmandy mounts and put the 5" refractor on one of them. The box collection that looked like a student film project version of the last scene in Raiders of the Lost Ark is largely gone 

Skin Graft Graft (Or Is That Skin Graft Squared?)

 The report from the Trump Administration is old news but the prosecutions below are not. 7/8/26 Fox News:

FIRST ON FOX: The Trump administration revealed new figures that show a drastic 7,100% spike in Medicare claims for skin substitutes in just six years as the task force led by Vice President JD Vance continues to crack down on fraud across the country.

The staggering increase in claims occurred between 2019 and 2025, surging from $200 million to $14.4 billion, prompting the anti-fraud task force and the Centers for Medicare and Medicaid Services (CMS) to identify potentially fraudulent claims and deny 96% of claims made since March.

The CMS, which is led by Administrator Mehmet Oz, identified 4,200 suspicious claims for skin substitutes, known as allografts, totaling $224 million in charges through May of this year.

"That's a lot of money," Oz said during a press conference in Milwaukee, Wisconsin, on Wednesday. "And that bankrupts not just hospital systems and physician groups, but it causes major problems across the entire landscape."

The agency also found alleged fraudulent claims for Durable Medical Equipment (DME), which includes wheelchairs, walkers, hospital beds and other essential equipment. The agency says that payments have been suspended to 102 suppliers and revoked billing privileges for an additional 725 suppliers.

"In just six months, the task force has effectively wiped out Durable Medical Equipment fraud in America," a spokesperson for Vance’s office told Fox News Digital. "After the vice president and Dr. Oz announced a moratorium on new DME companies, paired with aggressive enforcement actions by DOJ and HHS, this kind of fraud has effectively ended."

The suppliers who were suspected of fraud and had payments suspended represented 8.6% of all Medicare-funded Durable Medical Equipment in 2025.

That is not a small problem: 8.6%. So where are the prosecutions? 7/1/26 Las Vegas channel 3:

A Las Vegas nurse practitioner has been indicted in federal court in Houston, accused of ordering unnecessary skin grafts for hospice patients who were already close to death.

Prosecutors allege the procedures were performed on patients who did not need them and that some of those patients died within days of the grafts. Authorities also allege $297 million in payouts tied to the scheme went toward luxury purchases and projects, including a Ferrari, an $865,000 necklace and a resort under construction in the Philippines.

If a patient is a few days from death, this makes even less sense than unneeded grafts for those who are going to live.

4/28/26 Los Angeles Times:

Federal prosecutors seized more than $2 million from a Pasadena wound-care clinic bank account “suspected of scamming millions of dollars from Medicare” through reimbursements for skin grafts that patients allegedly never received, federal officials announced Tuesday.

Working with Department of Homeland Security Investigations, First Assistant U.S. Atty. Bill Essayli revealed that Expert Wound Care, which does business as St. Victoria Home Health Care, is the target of a federal inquiry. The Pasadena-based clinic is accused of fraud, according to a seizure warrant affidavit that federal prosecutors filed Monday and that a federal magistrate in Los Angeles approved.

The clinic received more than $34 million in federal payouts, with claims involving a single patient totaling more than $6 million, according to a U.S. Secret Service agent affidavit in the investigation. Expert Wound Care and its principals could be immediately reached for comment on Tuesday. 

 

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