We need non-Apple App Stores - because Apple's store has trash like Luni Scanner App.

[Update 3/6/2022: After I exposed this scam I revisited our purchase history and the listing for the scam subscription had changed. Instead of "Luni" the company and "Scanner" the App it showed:

"Municorn" the app and AlexeyBogdanov272750744 as the Seller.

In addition, when I clicked on the Report a Problem link I see there's an entirely new feature!

Unfortunately, perhaps due to issues with my Store Apple ID, I can't select that Apple ID as a family member. Other family members appear.

--------------- ORIGINAL

There are several good arguments for a non-Apple iOS App Store. The best reason I know if for competing App Stores is that Apple's App Store has many frauds.

Consider the case of the Luni Scanner App; #85 in "Business" in the US App Store. 

Luni's is a "mobile app publisher" their site claims they are "the largest french app publisher" (yes, lower case "french"). Their domain information is protected. All their apps are subscription based. 

Luni makes a suspiciously wide range of apps with generic names including a "VPN" app, a "Translator" and a "Video Editor":

The VPN app has 22.9K ratings with an average of 4.7/5 by people like "yessirbruh". The 'most critical' ratings (only accessible on iOS) make clear it is a scam with clever subscription pattern that tricks users into paying a high weekly rate.

The Scanner App is the similar scam that bit my family. It has 174K ratings and 5 stars. The vast majority are obviously purchased. The "critical" reviews mention unwitting subscriptions. A screenshot that appears on first launch shows how it works for the "Free" app with add-in purchases:

This covers the entire screen. It appears that one cannot use the App without clicking Continue. In fact if a user closed this screen the App can be used. Of course most naive users, inducing our family member, will click Continue so they can start their "free trial". Except that's NOT what Continue does. Within 3 days charges will start. In our case, not $10 a month, but $5 a week.

The family member has some reading and processing issues, and a trusting nature, that made him particularly vulnerable to a scam. He thought "5 stars" actually meant something. It didn't occur to him that Apple would allow fake reviews; he trusted Apple. He was also unaware that iOS Notes has a decent scanner app, that Microsoft provides an excellent free app, and that we actually own a quality app from Readdle. 

Because of the way Apple's Family Sharing works for purchases the monthly charges went to my Apple ID. Because of changes Apple made to Apple IDs that account couldn't receive email; I stopped getting Apple purchase statements over 12 months ago.

It took some time for me to see what had happened. I only discovered the scam when doing a routine review of our iTunes subscriptions. With some help from Google I was able find where Apple shows purchase records -- about 20 weeks at $5/week. With more Google help I placed a repayment claim against 20 charges (Apple does not support repayment claims against a subscription.) At this time I do not know if Apple will process the claims.

Scanner App is far from the only scam app on the App Store, and Luni far from the only "publisher" to earn millions from dark subscription patterns. Apple has let this problem fester for years; they are unwilling to fix it.

That's why we need alternative curated high quality App Stores. So we can restrict purchases to a trustworthy vendor.

For me $100 is not a big cost and the experience is a great learning opportunity for my family member. Even so, a reaction is needed. I'm sharing this experience here, but more importantly I'll share a condensed version with our two MN Senators and our Representative and the MN attorney general. If Apple doesn't get the money out of Luni I'll try the AMEX fraud process.

To be clear, the problem is Apple. Luni is just taking advantage of the opportunity they've been given. We need quality App Stores. That requires competition.

Below it the letter I'm sending to our Senators and Representative:

I'm writing to share a family story that illustrates why we need alternatives to Apple's iOS App Store. I hope you will support efforts to force Apple to allow competing App Stores with viable business models.

The problem is Apple has done a poor job keeping scams out the App Store. Recently a vulnerable adult family members was tricked by very sneaky sign up procedure. He unwittingly subscribed to a worthless app for $5/month. Because Apple has no controls on purchases in family sharing accounts I got the bill. It ran for at least 20 weeks before I spotted it and unsubscribed. I submitted a reimbursement request to Apple for 20 transactions.

When I investigated I found the app vendor, Luni, had dozens of similar worthless apps with the same trick subscription process. They have hundreds of thousands of fake reviews. The scam Scanner App was #81 in its category with a 5 star rating. The "publishers" make millions. I'd wager they are a front for anyone who has a good scam app; they create an icon, embed their subscription scam, and take a cut.

The App Store has many apps like this. They make Apple hundreds of millions of dollars a year. Perhaps billions. Apple could have cleaned them out years ago. They could do so many things to make these traps less effective. They've done none of them.

We need a better App Store. Apple doesn't deserve a monopoly on iOS App sales because it's been at best negligent, at worst malevolent. We need higher quality trustworthy curated App Stores in place of Apple's service.

Civilization, complexity and the limits of human cognition - another attempt at explaining the 21st century

The 70s were pretty weird, but I was too young to notice. (Not coincidentally, the Toffler/Farrell Future Shock book was written then.) By comparison the 80s and 90s more or less made sense. In 1992 Fukuyama wrote "The End of History" and that seemed about right for the times.

Things got weird again in the late 90s. I was in a .com startup and I remember valuations getting crazy about 1997, 3 years before the .com crash. We were still picking ourselves up from the crash when 9/11 hit. (A year later, on a purely personal note, my youngest brother vanished.) In the early 00s came Enron and other frauds almost forgotten now. Then in 2008 the real estate collapse and the Great Recession. We were barely recovering from the Great Recession when Trumpism hit. Followed by COVID (which was expected and not at all weird) and the Great Stupidity of the American Unvaccinated (which we did not expect and is perhaps weirdest of all).

Each time the world went off kilter I have tried to figure out a root cause:

In Feb 2009 I tried to figure out the crash of 2008:

At last count my list of contributing factors to the crash of '09 included ...

1. Complexity collapse: we don't understand our emergent creation, we optimized for performance without adaptive reserve
2. Mass disability and income skew: The modern world has disenfranchised much of humanity
3. The Marketarian religion: The GOP in particular (now the Party of Limbaugh), but also many Democrats and libertarians, ascribed magical and benign powers to a system for finding local minima (aka The Market). The Market, like Nature, isn't bad -- but neither is it wise or kind.
4. The occult inflation of shrinking quality: What happens when buyers can't figure out what's worth buying. Aka, the toaster crisis - yes, really.
5. performance-based executive compensation and novel, unregulated, financial instruments: a lethal combination. See also - You get what you pay for. The tragedy of the incentive plan.
6. Disintermediating Wall Street: Wall Street became a fragile breakpoint 
7. The future of the publicly traded company: A part of our problem is that the publicly traded company needs to evolve
8. The role of the deadbeats: too much debt - but we know that
9. Firewalls and separation of powers: a culture of corruption, approved by the American electorate, facilitated dissolving regulatory firewalls
10. Marked!: Rapid change and the Bush culture made fraud easy and appealing

I put Marked! pretty low on the list, but maybe I should bump it up a bit. The Hall of Shame (Clusterstock) lists a lot more fraud than has made the papers [1]...

• Fairfield Greenwich Group: quietly complicit in the Madoff fraud?
• Angelo Mozilo: white collar mobster
• Sam Israel: a $400 million fraud. In the old days, he'd have been front page news. I never heard of him.
• Many more, each of which would have been in the news once - including: JS Forte, RS Piccoli, JG Ossie, D Palmer, A Nodel, Marc Dreier.
• Those swindlers who have made the news... Allen Stanford, and, of course, Mr. Madoff.

By 2010 I was focusing on RCIIIT: The rise of China and India and the effects of IT.

... The Rise of China and India (RCI) has been like strapping a jet engine with a buggy throttle onto a dune buggy. We can go real fast, but we can also get airborne – without wings. Think about the disruption of German unification – and multiply than ten thousand times.

RCI would probably have caused a Great Recession even without any technological transformations.

Except we have had technological transformation – and it’s far from over. I don’t think we can understand what IT has done to our world – we’re too embedded in the change and too much of it is invisible. When the cost of transportation fell dramatically we could see the railroad tracks. When the cost of information generation and communication fell by a thousandfold it was invisible ...

In 2016 and again in 2018 I tried to explain Trumpism by contributing factors (I was too optimistic about Murdoch's health though):

• 65% the collapse of the white non-college “working class” — as best measured by fentanyl deaths and non-college household income over the past 40 years. Driven by globalization and IT both separately and synergistically including remonopolization (megacorp). This is going to get worse.
• 15% the way peculiarities of the American constitution empower rural states and rural regions that are most impacted by the collapse of the white working class due to demographics and out-migration of the educated. This is why the crisis is worse here than in Canada. This will continue.
• 15% the long fall of patriarchy. This will continue for a time, but eventually it hits the ground. Another 20 years for the US?
• 5% Rupert Murdoch. Seriously. In the US Fox and the WSJ, but also his media in Australia and the UK. When historians make their list of villains of the 21st century he’ll be on there. He’s broken and dying now, but he’s still scary enough that his name is rarely mentioned by anyone of consequence.
• 1% Facebook, social media, Putin and the like. This will get better.

That 1% for Facebook et all is pretty small — but the election of 2016 was on the knife’s edge. That 1% was historically important.

A few months ago I listed 3 causes for the post-COVID supply and labor shock economics of 2021:

1. Wealth became extremely concentrated. 

2. Returns on labor for 40% of Americans fell below modern standard for economic life.

3. Good investments became hard to find.

It's almost 2022 now, so we're into almost 25 years of the world not making sense any more. So now I'm digging even deeper for a root cause.

Today I'm going with Gordon's Law: the complexity of a complex adaptive system will increase until it reaches a limiting factor. Our civilization is a complex adaptive system and its complexity increased until it hit a limiting factor -- the complexity capacity of the average human. These days between 40 and 50% of American's can't handle civilization 2021 (sometimes I call this mass disability (see also). Witness among other things, The Great Stupidity of the FoxCovians.

It's a variant of the "Future Shock" Toffler wrote about 52 years ago. I don't have a fix; I don't think the world will get less complex. Our technologies are moving too fast. Maybe we'll just get used to not understanding the world and civilization will stumble on regardless. After all, for most of human history the world was incomprehensible -- and we did manage. Sort of. Mostly without civilization though ...

The Cybernated Generation: Time Magazine, April 2nd 1965

First check out the Time magazine covers for 1965. That was a very long time ago. Things have improved.

Now look at the April 2nd issue and particularly The Cybernated Generation. Every generation since 1965 has been declared cybernated or digitized or meta-sized.

The article is fascinating as a history of computing and our understanding of its impact -- and as a cultural artifact about a world of white men in white coats. There are no women save a secretary to "pass" at. There is no melanin. There are nerds. Some hyperbole aside there's not a lot that the author missed about the world to come...

As viewed by Sir Leon Bagrit, the thoughtful head of Britain's Elliot-Automation, the computer and automation will bring "the greatest change in the whole history of mankind.

... Boeing announced plans two weeks ago to outfit jetliners with computer-run systems that will land a plane in almost any weather without human help. A new "talking computer" at the New York Stock Exchange recently began providing instant stock quotations over a special telephone. In Chicago a drive-in computer center now processes information for customers while they wait, much as in a Laundromat. The New York Central recently scored a first among the world's railroads by installing computer-fed TV devices that will provide instant information on the location of any of the 125,000 freight cars on the road's 10,000 miles of track...

...  In 1834 an eccentric Englishman named Charles Babbage conceived the idea of a steam-driven "Analytical Engine" that in many details anticipated the basic principles of modern computers. 

... Even if no further advances were made in computer technology, some scientists maintain, the computer has provided enough work and opportunities for man for another thousand years....

... The most expensive single computer system in U.S. business is American Airlines' $30.5 million SABRE, a mechanical reservation clerk that gives instant up-to-the-minute information about every plane seat and reservation to American's 55 ticket offices. ...

... Computers now read electrocardiograms faster and more accurately than a jury of physicians. The Los Angeles police department plans to use computers to keep a collection of useful details about crimes and an electronic rogue's gallery of known criminals. And in a growing number of schools, computers have taken jobs as instructors in languages, history and mathematics...

... IBM is far and away the leader in the field, both in the U.S. and abroad...

... The computers have also spawned the so-called "software" industry, composed of computer service centers and independent firms that program machines and sell computer time (for as little as $10 an hour) to businesses that do not need a machine fulltime....

... Because computer technology is so new and computers require such sensitive handling, a new breed of specialists has grown up to tend the machines. They are young, bright, well-paid (up to $30,000) and in short supply. With brand-new titles and responsibilities, they have formed themselves into a sort of solemn priesthood of the computer, purposely separated from ordinary laymen. Lovers of problem solving, they are apt to play chess at lunch or doodle in algebra over cocktails, speak an esoteric language that some suspect is just their way of mystifying outsiders. Deeply concerned about logic and sensitive to its breakdown in everyday life, they often annoy friends by asking them to rephrase their questions more logically....

Until now computer experts could only communicate with their machines in one of 1,700 special languages, such as COBOL (Common Business Oriented Language), Fortran (Formula Translation), MAD (Michigan Algorithmic Decoder) and JOVIAL (Jules's Own Version of the International Algebraic Language). All of them are bewildering mixtures that only the initiated can decipher. Now some computers have reached the point where they can nearly understand—and reply in—plain English. The new Honeywell 20 understands a language similar enough to English so that an engineer can give it written instructions without consulting a programmer. The day is clearly coming when most computers will be able to talk back.

... Each week, the Government estimates, some 35,000 U.S. workers lose or change their jobs because of the advance of automation. There are also thousands more who, except for automation, would have been hired for such jobs. If U.S. industry were to automate its factories to the extent that is now possible—not to speak of the new possibilities opening up each year—millions of jobs would be eliminated. Obviously, American society will have to undergo some major economic and social changes if those displaced by machines are to lead productive lives.

Men such as IBM Economist Joseph Froomkin feel that automation will eventually bring about a 20-hour work week, perhaps within a century, thus creating a mass leisure class. Some of the more radical prophets foresee the time when as little as 2% of the work force will be employed, warn that the whole concept of people as producers of goods and services will become obsolete as automation advances. Even the most moderate estimates of automation's progress show that millions of people will have to adjust to leisurely, "nonfunctional" lives, a switch that will entail both an economic wrench and a severe test of the deeply ingrained ethic that work is the good and necessary calling of man...

... Many scientists hope that in time the computer will allow man to return to the Hellenic concept of leisure, in which the Greeks had time to cultivate their minds and improve their environment while slaves did all the labor. The slaves, in modern Hellenism, would be the computers...

... The computer has proved that many management decisions are routine and repetitive and can be handled nicely by a machine. Result: many of the middle management jobs of today will go to computers that can do just about everything but make a pass at a secretary...

... What it cannot do is to look upon two human faces and tell which is male and which is female, or remember what it did for Christmas five years ago." Bellman might get an argument about that from some computermen, but his point is valid...

... Most scientists now agree that too much was made in the early days of the apparent similarities between computers and the human brain. The vacuum tubes and transistors of computers were easy to compare to the brain's neurons—but the comparison has limited validity. "There is a crude similarity," says Honeywell's Bloch, "but the machine would be at about the level of an amoeba."... eventually the idea that a machine has humanlike intelligence will become part of folklore...

... In the years to come, computers will be able to converse with men, will themselves run supermarkets and laboratories, will help to find cures for man's diseases, and will automatically translate foreign languages on worldwide TV relayed by satellite. Optical scanning devices, already in operation in some companies, will eventually enable computers to gobble up all kinds of information visually. The machines will then be able to memorize and store whole libraries, in effect acquiring matchless classical and scientific educations by capturing all the knowledge to which man is heir....

... computers will eventually become as close to everyday life as the telephone—a sort of public utility of information...

... the computer is already upsetting old patterns of life, challenging accepted concepts, raising new specters to be conquered. Years from now man will look back on these days as the beginning of a dramatic extension of his power over his environment, an age in which technology began to recast human society. In the long run, the computer is not so much a challenge to man as a challenge for him: a triumph of technology to be developed, subdued and put to constantly increasing use.

Inline Skating San Francisco -- from 1997!

I wrote this in 1997 and found it in my old pre-blog Web 1.0 archives. I decided to republish it here because, you know, I could. Some of it may even be relevant today.

Before blogs we did this kind of thing in wysiwyg tools (FrontPage 97 for this piece) and then FTPd to a web server. 

The original page is still on the web but it is not known to Google. Astonishingly it's in the Wayback Machine.

2021, 3 causes

Copied from a tweet of mine, a cartoon explanation of our peculiar economic situation.

1. Wealth became extremely concentrated. 

2. Returns on labor for 40% of Americans fell below modern standard for economic life.

3. Good investments became hard to find.

Something had to give. COVID broke the dam.

Trek's Mino Link of Doom - beware the lost spacer (Trek Fuel EX mountain bike)

Update Oct 18, 2021: I wrote Trek a paper letter (!) about my experience and they are working on removing any references to trailside Mino Link maintenance.  They are also sending me some nice swag for my troubles. (Lastly, yesterday I found the lost Mino Link spacer in the dirt of my driveway. So now I have an extra!)

----

The Trek Mino Link is a feature of the Fuel EX. It lets you raise or lower the bottom bracket depending on whether you prefer fewer pedal strikes or a lower center of gravity. Trek says: "Mino Link lets you quickly and easily make small geometry adjustments to suit your riding style or terrain." 

As of Sept 2021 Trek's Mino Link video claims you can even swap your geometry on the trail.

I am here to tell you that you we would be insane to touch the Mino Link over dirt. If you're going to mess with the Mino Link do it over light carpet so you can see what falls out and pick it up -- especially the critical spacer/washer. A sterile environment would be nice.

The 2021 Mino Link is a problematic design. (The YouTube videos I've seen describe an earlier version that the nut and the bolt, I can't speak to that design.) That doesn't mean you should avoid the Fuel EX -- I really like mine. It does mean you should treat the Mino Link cautiously. If you aren't mechanically inclined have your local shop swap it. If you are then do it over that light carpet. Check that it's secure each time you ride (I do before and after).

The problem is the washer:

SUSPENSION PART GENERIC WASHER 10 X 16 X 3.0 Item: 601479594559

Those two black washers fit are supposed to fit on the inside of the bearing race shown below. The race that's scarred up because the washer fell out when I was adjusting the Mino Lake and it took weeks for me to figure out what had happened:

Here's the other eroded part of the Mino Link hinge:

It doesn't look as bad with a replacement washer in place (it was a bit tricky to get it to stay in during assembly). You can see the black outer washer between the assembled frame components:

If you swap the Mino Link and unknowingly lose the washer two things can happen:

1. Everything assembles and seems fine but the bolt will work loose. You may have the Mino Link come apart on one side. I don't know how long the assembly will hold with just one bolt, but if it fails you'll have an unpleasant mechanical.

2. Number 1 happens so now you tighten it to spec and because you have lousy vision and it's dark you don't notice that one side of the assembly has very little to no space between two hunks of aluminum. It starts to squeal when all the nice paint and gloss wears off. Then you figure out WTF happened and buy a replacement.

Both of these are bad in their own way. I like my Trek Fuel EX. I like Trek. Just be careful about the Mino Link.

Exercise for Olds: year 63 (CrossFit and so on)

I entered my 63y recently. For me this means another look at what I'm doing with the old arthritic body I've got.

I started doing CrossFit in April of 2013. I was 53 when I started so I'm into my 9th year at CrossFit St Paul. There have been some interruptions for injury rehabilitation and COVID shut us down for a few months (I built a home gym), but it's been pretty much continuous. I've been there over a thousand times by now. I was at my peak strength and ability around age 60 -- probably stronger than I had ever been! I ran into some recurrences of lifelong and new back issues after that, but recently my new rehab program has worked pretty well. I'm not far off peak strength now and I think I'm still stronger than I was in my 30s. There are a few lifts where I could still get a new lifetime personal record.

I restarted (did some in early 90s) mountain biking 6-7 years when my oldest son joined a new High School team. I was a parent volunteer then; he stopped but I continued. During COVID I bought a Fat bike and road with friends and lights through the dark winter. A few months ago I added a new full suspension bike (Trek Fuel EX 7). I'm by far the best mountain biker I've ever been. That's a bit of a problem actually. I'll get to that.

I started ice hockey much the same way I started mountain biking. I skated as a volunteer and team manager for Minnesota Special Hockey and then 4-5 years ago I joined a local pickup league on my own. Last year was lost to COVID though.

I've always done road biking and that continues. I've a century ride coming up next week and next month. I do some short 3-5 mile runs with Emily, but not that much on my own now. I swim very little now. I inline skate with my middle son every week or two. I love classic Nordic (cross country) ski but the climate has not been our friend.

The body is mostly holding up. A typical week might look like:

Sunday: CrossFit and family bike ride/Nordic ski, in winter coach special hockey

Monday: CrossFit

Tuesday: Home CrossFit with Emily and #2 (a relative rest day for me)

Wed: Mountain bike (summer) or Fat bike (winter) ride with a friend - can be intense

Thur: Inline skating or Mountain bike with #2 (rest day)

Fri: CrossFit (plus Hockey in winter)

Sat: Road bike ride, Fat bike in winter, sometimes just a rest day

In addition I do my rehab exercises at least 4/week. I've come to love the Romanian Deadlift (RDL). I struggled a few years ago when gyms eliminated the therapeutic back extension machine I was taught to use but my PT signed off on my RDL program and it's worked well.

So far I'm still on the the 30 year plan. In 2014 I figured I'd have to downshift at 65; that sounds about right with another drop at mid-70s and dead at 85.

What's changing? With age I do a better job of relative rest days (2-3 a week of easy activity) but there are still more things I want to do than I have time for. I'm having trouble eating enough to build muscle (also limited by age related stem cell depletion). If/when I retire I will have more time to work on strength development, that's currently hard to fit in. Mountain biking is an odd problem -- it's great exercise, I love doing it -- and I'm getting too good at it. I'm good enough to do trails where a mechanical failure or a personal mistake could lead to serious injury. I should be wearing a full face helmet -- but at my age that's insane. So I have to back off a bit. It's hard to do ...

Schwinn IC 4 / Bowflex / Nautilus cycle trainer - review with Zwift and Peloton apps

We've used our Schwinn IC 4 cycle trainer for about 10 months now. It was a pandemic purchase in December of 2020. The same trainer is sold as a Schwinn IC4, a Bowflex and a Nautilus.

We paid $900 from Dicks sporting goods. In September 2021 it's closer to $1000. It may be the only decent trainer left that doesn't require a Peloton-style subscription.

It's worked well for us. The only crappy part was the pedals, but the manufacturer expects those to be replaced. My son likes SPD clips so we use those with an adapter for shoes. The magnetic resistance is easy to adjust and quiet. Unlike trainers that attach to a bicycle it's easy to move and adjust for different heights (in our home 4'11" to 5'11"). There's a mount for iPad and a USB power out.

The trainer connects with Zwift on my son's iPad via Bluetooth and transfers the calculated power output. So if you adjust the magnetic resistance but keep a constant pedaling cadence then the power output goes up. The power output is reflected in Zwift cycling speeds. Unlike more expensive units the resistance doesn't vary based on the Zwift simulated course -- but if you go "uphill" in the simulation your power output converts to slower speeds.  So it works.

It comes with a heart monitor that worked when we tested it but we never use it.

It weighs 106 lbs and comes with front wheels that make it easy for me to move. That turned out to be much more important than I expected, we move it around depending on what we're doing in the home gym.

Besides Zwift (my son has a subscription for $15/month) I tested connecting it to a bundled "ExploreTheWorld.app" and "Peloton.app".  You can't connect to an Apple Watch. ExploreTheWorld came with 4 free videos ws not very interesting.

Peloton is all classes ... lots and lots of classes. It behaves like a real iOS app with a slick signup. You get 1 month free then it's $14/user. You have to adjust the resistance yourself, the Peloton app can't change it.

Zwift is simulated rides with an avatar and lots and lots of group rides and routes. The UI is pretty crude on an iPad, I think it's made for a giant low res display or maybe a remote monitor. You get 23KM free then it's $15/user/month. We got a Zwift account for my son, the rest of us just watch our iPad or use the trainer for intervals in our family CrossFit workouts.

Alzheimer's and Amyloid: How even a perfect aducanumab could help some and hurt others.

Representational drift, if validated, tells us that a memory is a set of relationships, not the specific neurons that embody those relationships. This sentence might be rendered in electrons or ink, but it has the same meaning.

Reading an article about this reminded me about an old concern with drugs that aim to treat Alzheimer's by reducing amyloid accumulation in neurons. Drugs like the recently approved (and seemingly minimally effective) monoclonal medication aducanumab. The root problem is that we don't know why neurons accumulate amyloid. There's been a growing suspicion over the past few years that amyloidization might in some way be helpful.

I wrote about one way this might play out in a twitter post which I've revised here:

Representational drift reminds me of a theoretical problem with aducanumab and amyloid therapy for Alzheimer’s dementia. It begins with recognizing that we don’t know why neurons accumulate amyloid. 

Many suspect amyloid has a physiological reason to appear in neurons. Suppose, for example, amyloid is the way old crappy neurons are "retired" from forming memory relationships. Amyloidization would then be the brain equivalent of marking a SSD region as unusable. 

A system like this would have 2 kinds of bugs. It might be too aggressive or not aggressive enough. 

If the retirement mechanism is too aggressive then neurons will be amyloidized prematurely. They could have still formed useful memories, but now they're dead. The brain can only produce so many neurons so it runs out prematurely. Early dementia develops. In this case a drug that cleared amyloid could help -- as long as it wasn't too aggressive. The balance may be fine and hard to get right. 

If the retirement mechanism is too permissive then a lot of flaky neurons accumulate without much amyloid. Dementia follows from this too -- but it might look clinically quite different. In this case a drug that cleared amyloid would make the dementia worse! Even more flaky neurons would accumulate. 

Even if the balance is just write we do run out of viable neurons. Even a very healthy centenarian has only a fraction of the cognition they once had. Again, in this case, an amyloid clearing drug would make the brain worse. 

If this was the way the brain worked then an amyloid reduction drug would make some dementia worse and some better. The net effect would be quite small -- even if the medication worked perfectly and was dosed correctly. 

All speculative. Come back in 5 years and see how it turned out.

Why did the patient's leg swell up?

I'm a physician. Ok, so it's a very part-time practice; I'm mostly a bureaucrat trying to keep civilization together. Still I have the degree and the board status and I listen to The Curbsiders religiously. So I was really annoyed when my left leg swelled up after a modest knee injury and I didn't know why. 

It wasn't just me; neither did my physician wife nor my colleagues nor the veteran ER doc I saw nor my CrossFit Physician colleagues. Nobody had an explanation. My rheumatologist had a story though, and I'll get to that one.

Legs swell for several reasons, but the textbook ones I know of are infection, bad veins, bad lymphatics and a backed up/overloaded drainage system (heart failure, kidney failure - usually both sides same). Less common causes are muscle damage (compression syndrome, rhabdomyolysis) and (rarely) tumors. Inactivity, esp sitting, makes most things worse.

My leg wasn't infected. I didn't think my veins had obstructed but I have a family history of clot [1] so I did get an ultrasound -- all good. My muscle, heart and kidneys are all reasonable for age. I didn't think my familial [1] "osteoarthritis" (better called mysterious arthritis) had messed up my lymphatics.

So I was mystified. Why had a knee tweak turned my left (below) leg* into a painless swollen ("edematous") bag with a good half-inch of tough pitting edema over my shin? True, I have an old somewhat arthritic cartilage-depleted knee ill-suited to 150 double-under badly executed rope jumps. True, after the jumps my knee had some kind of meniscal tear and a medial ligament strain. Still, it seemed disproportionate.

I bought a cheap Amazon compression sock that worked better than I expected and I did my usual careful injury care. Meaning I did a lot of mountain and road biking and whatever CrossFit my injured knee could handle. Sitting made the leg swell, sleep and exercise with the compression sock (esp. biking) made it better.

Over the course of about 3-4 weeks the knee improved and the leg swelling mostly resolved. I still didn't know what was going on though. For a while I wondered if I'd ruptured a Baker's cyst (an arthritis thing) doing a heavy squat, but my knee effusion didn't flatten out and the volume seemed too high and persistent.

So I asked my rheumatologist. He claimed I had "reflex sympathetic dystrophy"- see also fpnotebook's great summary. Textbook RSD (now more often called "complex regional pain syndrome") is a badly understood and ill-defined disorder with a dismal prognosis. Patients I've seen with it usually have debilitating chronic pain and often have mental health issues that predate the injury. 

I had no pain that I noticed but he claimed this was not unusual in his experience. Reading the online references as a grumpy old seasoned physician I can confidently say we have no idea why things swell in RSD and that the handwaving talk about autonomic dysfunction and inflammation is mostly bullshit. I do believe there's a genetic component [1] and that the articles are correct to recommend exercise and compression. Once again my exercise addition led to a good outcome [2].

So, yeah, I'll go with RSD, which in this case translates as "it swells because you have a (somewhat rare) genetic malfunction in your injury response and the correct treatment is compression and exercise". It didn't show up in the differential of the textbooks I read, but I'll see if my friend Dr. Scott Moses will add it to his fpnotebook article on unilateral edema.

* technically and pedantically the leg is part of the lower limb below the knee but of course we use it to mean lower limb.

[1] All courtesy of my beloved mother who died age 87 of every possible medical condition (she lived on pure wilfullness). I inherited all her bad genes and, yes, she had bad leg edema. My father by contrast had only a bad back and post-90yo dementia but I inherited his back and probably the dementia disposition too. Happily my children are adopted.

[2] My back praises the Romanian deadlift.

Update 11/7/2021, wow, that's one ugly looking photo. I don't know what it was, or why it happened, but I guess I'll go with RSD plus some dubious lymphatics. My knee got better over 8-10 weeks and the edema resolved over 4 to 16 weeks. Sometimes I have trace pre-tibial edema but mostly nothing.

Update 4/12/2023: Never came back. So weird.

Mountain bikes have come a long way very quickly

My trail bike is a 2010 Cannondale Scalpel I bought used. It was a state-of-the-art racing machine in the 26" era and it's light and fun to ride.

Today I rode a friend's 2018 Trek Fuel EX alloy bike with 27.5" wheels. The Scalpel is lighter and has nicer brake levers -- but in every other way the $2,500 Fuel EX is a much better bike. Faster to climb, faster to descend, faster to cross country, better on the bumps, better shifting over a 1x range.

Huge price drop for better quality in 8 years. That's faster progress than my MacBook.

My prophylactic back exercise routine

I wrote the original of this post in the early COVID era. Since then I expanded the basement home gym with a way over-specced power lifting squat rack and a full Olympic spec weight set (what I could find, more than I wanted).  I also ran into some minor back strains, perhaps due to on/off COVID CrossFit and more of the age and arthritis annoyances. Between those two developments I've expanded my pre-lifting warmup. I still do the morning stretches and (on non-lifting days) the evening Roman chair, but if I'm lifting I have a more extensive warmup now:

• Roman Chair 10 reps
• Inchworm toe touch to push-up then Up/Down dog 5 reps
• Tuck 20 reps
• 1 arm lateral planks 40 sec each side followed by 5 lateral dips
• Touch toes with rounded back and slow roll-up
• Bar hang knee/hip rotation 40 reps (Hang from bar, trace figure 8 with knees while flex or extend hips.) 
• Tuck 20 reps
• Roman Chair 10 rep with two 15 lb dumbbells held in 90 degree reverse curl
• Romanian Deadlift (RDL) with 15lb dumbbells x 10
• Roman Chair 10 rep with two 25 lb dumbbells held in 90 degree reverse curl
• Romanian Deadlift (RDL) with 25lb dumbbells x 10
• RDL with 95 lb barbell x10
• Tucks
• RDL with 115 lb barbell x 10
• Tucks
• RDL with 135 lb barbell x 15
• Tucks
• RDL with 145 lb barbell x 10

[Update 11/11/2021: These days I take the RDLs off my rack and I go from 135 to 185 -- but I'm not sure there's much to gain for me above that. 

12/3/2022: My current routine does less roman chair, RDLs now 195, more hamstring stretches but otherwise pretty similar.]

 The Roman Chair is a 10yo StrengthTrainer ST45.

Then the workout. 

In the morning, for over 12 years I do these stretches every morning before I get out of bed, I got them from Physicians Neck and Back Clinic in Roseville MN (click for full size):

I don't bother with the wall lean stretch in morning (see below) and I combine the standing thigh stretch with a freestanding balance exercise of pivoting forward to stretch hamstring.

Editorial comments from 5/24/20 (rest of this article was updated more recently, the foot drop mentioned here went away about 1.5-2 years post onset)

My experience as a physician who treats people with back pain and as someone who has had some success with the problem is that nobody wants to hear that fitness is (almost!) the only fix. I get it, twenty years ago I also thought of this is an unfixable problem too, but at least since 2009 this has been common knowledge. The surprising bit is how much exercise it takes.

My back isn't bulletproof. I've had several episodes of back pain over the past 12 years. The most worrisome was seven months ago and was probably an L5/S1 disc prolapse. That took 6 weeks to mostly heal with diligent exercise and 10 weeks before I could set new CrossFit personal weight lifting records. I think I have some residual left foot extensor weakness (had to switch from low support CrossFit shoes to real running shoes for runs). On the other hand I play ice hockey, do CrossFit Olympic lifts, and basically expect a lot out of a crummy old back.

Weird world example: "virtual cameras" for online videoconferencing

Somewhere in my twitter stream mention was made of the "virtual camera" and its advantages for videoconferencing especially as a replacement for screen sharing.

Sounded interesting, so I went looking for more information. I thought it would be an easy google search.

All I could find, in written form, was one quickly written blog post from 2019.

Twenty-five years ago a similar topic would have had a deep technical article in BYTE and a myriad of articles in PC Magazine, Mac User, and the like. Fifteen years ago there would have been hundreds of excellent blog posts. Google would have found them all.

Now Google finds almost nothing.

How is discovery happening in 2021? I'm ancient, so I'm quite ready to believe there are sources I don't know about (and Google, evidently, doesn't care about). What are they? What is the replacement for Google search?

Sapiens by Yuval Noah Harari - a brief review

I'm a fairly average sleeper for my age, but this morning I gave up a bit before 4am. With the unexpected time I finished Yuval Harari's 2015 book "Sapiens: A Brief History of Humankind". (The "finishing" part is a bit unusual, I too often lose interest 80% of the way through many books.)

Sapiens was, I've read, quite popular with the Silicon Valley set. So I was prepared to dislike it from the start. In truth, while I can see why the Captains of Industry were fans, it's not a bad book. I'd grade it as very good to excellent.

I didn't learn much new -- I have read many of the same things as Harari. I was reminded, though, of things I'd forgotten -- and he touched on many of my favorite themes. If I'd read this as a young person I might have found it astonishing.

What are the flaws? He has a weird definition of "The Liberal" and he really dislikes whatever he means by that. He has a thing about Hosni Mubarak -- a loathsome person, but an odd choice for chief villain. He is glib, but that's a necessity in a book like this.  The glibness is somewhat offset by his habit of critiquing his assumptions at the end of each chapter. He's weakest when he strays into the sciences, particularly biology. Since he wrote this book we’ve seen Trumpism, the rise of Xi, and the slow burn of the Left Behind — events that might cause reconsiderations.

I liked the repeated reminder that non-human animals have paid a terrible price for the rise of humanity. Most books of this kind don't consider them.

In a book of this sort one constantly tries to decipher the author's agenda. What does Harari truly think? He clearly admires Buddhism; I would be surprised if he were not a practitioner of the more intellectual forms of Buddhism. He has a love and admiration for capitalism that outshines his self-critique. On the current American spectrum of political ideology he'd be a techno-optimist libertarian to the right of Obama and me (his characterization of the British Empire is more than slightly incorrect.)

Most of the time the book affirmed my own beliefs and reminded me of things I'd forgotten. Sometimes it annoyed me, but in a way that forced me to examine my priors. It's aged well -- even if some of his 2014 near-future predictions look to be still a decade or two away. I recommend it.

Nordic skiing: Salomon SNS boot and binding compatibility - Profil vs Pilot

I usually share my blog posts to Pinboard, and from there some creaky old services create tweets and an archive on kateva.org/sh. Not this post though. This post is purely for the search engines. Here I will reveal knowledge lost to humanity. As far as Google can tell, it's not available anywhere but here.

I have been through 3-4 kinds of cross-country ski binding -- 3 pin, something with a post that went straight up (Salomon?) and then bindings I thought of as SNS (in fact they are all SNS Profil, the first version of SNS). I have SNS Profil bindings on 3 "classic" skis all between 25 and 38 years old. All work quite well and, given the limited present and worse future of Nordic skiing I've no reason to replace them. (I'd buy skate ski gear if Minnesota winter were not dying, but I invested in a Kona Wo fat bike instead.)

Which brings me to the point of this post. The bindings work, but after 40 years or so the boots have disintegrated. I needed to either replace the bindings on 3 skis (does anyone even do that on such old gear?) or find SNS boots. Problem is Salomon stopped making SNS boots sometime in the past decade. They are an obsolete proprietary system that was replaced by NNN (and probably more modern proprietary variants too). I might be able to find used boots, but that's a long slow process. Happily, in this one area, Google still works. I found a new pair of Salomon R/Pilot Combi (Combi because they are supposed to work for classic and skating) boots from Boulder Nordic Sport and had them shipped to my home in Minnesota. Despite being marked as US size 10 they were EU 44 -- really US 10.5. Even then they are bit on the generous side, but they fit me well enough. I think Solomon made biggish boots.

They also fit my bindings. They came with a tiny manual that actually describes what ancient discontinued Salomon boot fits which binding types. This is information that can be found nowhere else  -- but even this obscure manual is misleading. So here is an enhanced version:

SNS PROFIL boots with 1 bar at toe -> SNS PROFIL bindings

SNS PILOT boots (1 bar at toe, 1 under ball of foot) -> SNS PROFIL bindings and SNS PILOT bindings (in other words, all SNS)

PROLINK boots -> PROLINK or NNN bindings

NNN boots -> PROLINK or NNN bindings

The Salomon's site for my R/Pilot Combi boots says they have 1 rail, but in fact they have two rails. Which fits their name. They do seem to fit my old Profil bindings, just as this old web page says (emphases mine):

... Some of the boots that use the Salomon SNS Profil binding include Salomon, Atomic and Hartjes... 

... Salomon also makes SNS Pilot bindings, and while Pilot boots can be used with a normal Profil binding, normal Profil boots cannot be used with Pilot bindings. There’s an extra hinge thingie on the Pilot bindings that attaches to the center of the Pilot boots and there’s no attachment point on the Profil boots...

In short, if you have SNS bindings, the "Pilot" boots should fit them.

PS. More on these old obsolete gear from the "binding confusion" page:

There are two main versions of the SNS Series, the Profil and the Profil Pilot ...  the black, extra hinge attachment plate in the middle of the Pilot binding.

... There’s only one cross bar on the SNS Profile and two cross bars on the Pilot. The Pilot system was intended to help stabilize the boot for skaters but I like it better for classic style striding as well.

There is both a manual and automatic version of the SNS Profil. The difference between the two versions is you physically have to open the manual styles by lifting up on the toe piece of the binding and the automatics you can simply step in to attach and use your ski pole to push down the release button on the toe piece to step out of them.... 

... Salomon also has the Propulse binding, which promises greater kick, but as far as I can tell, it accepts all SNS Profil boots...