Book Review: Tunnel in the Sky, Robert Heinlein

In William Golding’s 1955 novel ‘Lord of the Flies’, a group of students is stranded on an island–and they revert quickly to barbarism.   The book sold millions of copies and has become common assigned reading for high school classes.   Another book, published at about the same time, projects a very different view of human nature and society.

Heinlein’s future world in Tunnel in the Sky has been faced with a crisis of massive overpopulation…a common projected future in books of this period:

…the population of Terra had climbed well beyond that which its farm lands could support.   The hydrogen, germ, and nerve gas horrors that followed were not truly political.   The true meaning was more that of beggars fighting over a crust of bread…Life, all life, has the twin drives to survive and to reproduce.    

Release from the Malthusian Trap was ultimately gained through an invention that opened up new worlds for settlement:   a hyperfold device called a Gate allows people to transition instantly from earth to their new homes light-years away…and, unlike rockets, the Gate technology allows very large numbers of people to be transferred.   There’s a catch, though:   keeping a gate open requires huge amounts of energy, so when the migrants move to a new planet, the gate is relaxed and they are left on their own until such time as they can offer enough trade goods to be worth the energy of reconnecting them…which may be a long, long time.   Hence, old skills have again become relevant…the situation of the settlers:

…made horses more practical than helicopters, picks and shovels more useful than bulldozers.   Machinery gets out of order and requires a complex technology to keep it going–but good old “hayburners” keep right on breeding, cropping grass, and pulling loads.

The book’s protagonist, Rod Walker, is a high school senior who plans on a future as a pioneer and a colonist and hence is taking a course in Outlands Survival.   Final exam time has arrived: the students will be sent to a planet of which they know nothing–the test rules are ANY planet–ANY climate–ANY terrain and NO rules–ANY weapons–ALL equipment.   They will be left on their own for 1-2 weeks, then returned to earth.

The class (which includes girls as well as boys) has a final session with their instructor…Rod is asked to stay after the others and is advised that he would be wise drop the course and skip the test:

Rod, you’re a good boy…but sometimes that isn’t enough.   I think you are a romantic.   Now this is a very romantic age; it calls for practical men…You are way too emotional, too sentimental to be a real survivor type…I’m not sure that you can beware of the Truce of the Bear.

But Rod decides to go, despite the advice and despite the fact that the boy he had intended to team with decides at the last moment to drop the class.   After passing through the Gate and finding himself alone, he discovers one of his classmates–who has been killed.   By a predator?   Yes…but:

Yo’s proud Thunderbolt gun was no longer in sight…The only animal who would bother to steal a gun ran around on two legs.   Rod reminded himself that a Thunderbolt could kill at almost any line-of-sight range–and now somebody had it who obviously took advantage of the absence of law and order in a survival test area.

After surviving for several days, beginning to get oriented, and encountering various local animal species, Rod meets up with Jack, a member of a different class sent to the same survival area.   Over time, they encounter others, and a group begins to develop with Rod as the de facto leader.   Their recall at the end of the test period is delayed–at first, they think it is just a minor technical problem of some sort, but the feeling grows that something has gone very badly wrong, and they may be stuck on this planet for an indeterminate time–maybe forever.

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A Pretty Decent Example of Government Public Communications

The FAA information page on the 5G vs radio altimeter issue.

Note especially the visual explanation of the answer to the question “if it’s safe in other countries, why would it be a problem here?   (linked in the text with the word ‘France’)

It strikes me that this is significantly better done than most government communications (whether federal, state, or local) regarding Covid.

 

More Supply Chain Stories

A guy who makes Programmable Logic Controllers (PLCs) writes about his problems getting parts and the impact on his customers.  He describes a PLC as:

…a computer that runs actual stuff. Not things like a washer and dryer but how about the water that comes into your house, the water that leaves, the drawbridge that needs to go up, the MRI you desperately need. Almost everything you touch that is manmade uses one of these controllers at some point in the process.

Lots of comments, many of them from people talking about their own supply chain experiences.

Gallipoli, China, and the Snapping Shrimp

An article in the Proceedings of the US Naval Institute says that a major factor in the Gallipoli disaster of WWI was the great effectiveness of the Turkish minefields, which checkmated the power of the Allied (British, French, and Russian) navies and prohibited a seapower-only passage through the Strait of Dardanelles.  The authors argue that China’s intensive production of naval mines could result in a similar strategically-critical threat in a future conflict.

Several approaches to reduce the minefield threat are discussed…one rather surprising angle is to exploit the characteristics of the snapping shrimp…these crustaceans generate extremely loud sounds when they close their claws, and American submarine commanders in WWII would sometimes hide in snapping shrimp colonies to mask their acoustic signatures from enemy hydrophones.  These creatures are especially and conveniently dense, it seems, in the East and South China Seas, and it is suggested that arrays of sensors, backed by considerable computing power, could process the returns from the noise generated by the shrimp and hence locate the enemy mines.

Stranger things have happened…I guess.

Extremely Cool

Here’s a 22-year-old who builds microchips in his parents’ garage.   His most recent production contains 1200 transistors, he made a 6-transistor version when he was a senior in high school.   The famous Intel 4004 microprocessor contained 2300 transistors, and he’s hoping to get to that level soon.

The article also mentions Jeri Ellsworth…in 2002, she created a system to emulate the old Commodore 64 computer, and also other systems of that period, so that she and other people could play old games that had been developed for them.   This led to Mammoth Toys hiring her to create a computer on a chip for the C64 Direct-to-TV joystick…it sold over half a million units.

Haven’t watched it yet, but she describes her own adventures in making microchips at home in the YouTube series Cooking with Jeri.

Great to see this kind of spirit!