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Scanning table for old digital cameras

I have several sheetfed scanners. They are great in many ways — though not nearly as automatic as they could be — but they are expensive and have their limitations when it comes to real-world documents, which are often not in pristine shape.

I still believe in sheetfed scanners for the home, in fact one of my first blog posts here was about the paperless home, and some products are now on the market similar to this design, though none have the concept I really wanted — a battery powered scanner which simply scans to flash cards, and you take the flash card to a computer later for processing.

My multi-page document scanners will do a whole document, but they sometimes mis-feed. My single-page sheetfed scanner isn’t as fast or fancy but it’s still faster than using a flatbed because the act of putting the paper in the scanner is the act of scanning. There is no “open the top, remove old document, put in new one, lower top, push scan button” process.

Here’s a design that might be cheap and just what a house needs to get rid of its documents. It begins with a table which has an arm coming out from one side which has a tripod screw to hold a digital camera. Also running up the arm is a USB cable to the camera. Also on the arm, at enough of an angle to avoid glare and reflections are lighting, either white LED or CCFL tubes.

In the bed of the table is a capacitive sensor able to tell if your hand is near the table, as well as a simple photosensor to tell if there is a document on the table. All of this plugs into a laptop for control.

You slap a document on the table. As soon as you draw your hand away, the light flashes and the camera takes a picture. Then go and replace or flip the document and it happens again. No need to push a button, the removal of your hand with a document in place causes the photo. A button will be present to say “take it again” or “erase that” but you should not need to push it much. The light should be bright enough so the camera can shoot fairly stopped down, allowing a sharp image with good depth of field. The light might be on all the time in the single-sided version.

The camera can’t be any camera, alas, but many older cameras in the 6MP range would get about 300dpi colour from a typical letter sized page, which is quite fine. Key is that the camera has macro mode (or can otherwise focus close) and can be made to shoot over USB. An infrared LED could also be used to trigger many consumer cameras. Another plus is manual focus. It would be nice if the camera can just be locked in focus at the right distance, as that means much faster shooting for typical consumer digital cameras. And ideally all this (macro mode, manual focus) can all be set by USB control and thus be done under the control of the computer.

Of course, 3-D objects can also be shot in this way, though they might get glare from the lights if they have surfaces at the wrong angles. A fancier box would put the lights behind cloth diffusers, making things bulkier, though it can all pack down pretty small. In fact, since the arm can be designed to be easily removed, the whole thing can pack down into a very small box. A sheet of plexi would be available to flatten crumpled papers, though with good depth of field, this might not strictly be necessary.

One nice option might be a table filled with holes and a small suction pump. This would hold paper flat to the table. It would also make it easy to determine when paper is on the table. It would not help stacks of paper much but could be turned off, of course.

A fancier and bulkier version would have legs and support a 2nd camera below the table, which would now be a transparent piece of plexiglass. Double sided shots could then be taken, though in this case the lights would have to be turned off on the other side when shooting, and a darkened room or shade around the bottom and part of the top would be a good idea, to avoid bleed through the page. Suction might not be such a good idea here. The software should figure if the other side is blank and discard or highly compress that image. Of course the software must also crop images to size, and straighten rectangular items.

There are other options besides the capacitive hand sensor. These include a button, of course, a simple voice command detector, and clever use of the preview video mode that many digital cameras now have over USB. (ie. the computer can look through the camera and see when the document is in place and the hand is removed.) This approach would also allow gesture commands, little hand signals to indicate if the document is single sided, or B&W, or needs other special treatment.

The goal however, is a table where you can just slap pages down, move your hand away slightly and then slap down another. For stacks of documents one could even put down the whole stack and take pages off one at a time though this would surely bump the stack a bit requiring a bit of cleverness in straightening and cropping. Many people would find they could do this as fast as some of the faster professional document scanners, and with no errors on imperfect pages. The scans would not be as good as true scanner output, but good enough for many purposes.

In fact, digital camera photography’s speed (and ability to handle 3-D objects) led both Google Books and the Internet Archive to use it for their book scanning projects. This was of course primarily because they were unwilling to destroy books. Google came up with the idea of using a laser rangefinder to map the shape of the curved book page to correct any distortions in it. While this could be done here it is probably overkill.

One nice bonus here is that it’s very easy to design this to handle large documents, and even to be adjustable to handle both small and large documents. Normally scanners wide enough for large items are very expensive.

Serve the multi-monitor market better with thin or removable bezels

A serious proportion of the computer users I know these days have gone multi-monitor. While I strongly recommend the 30” monitor (Dell 3007WFP and cousins or Apple) which I have to everybody, at $1000 it’s not the most cost effective way to get a lot of screen real estate. Today 24” 1080p monitors are down to $200, and flat panels don’t take so much space, so it makes a lot of sense to have two monitors or more.

Except there’s a big gap between them. And while there are a few monitors that advertise being thin bezel, even these have at least half an inch, so two monitors together will still have an inch of (usually black) between them.

I’m quite interested in building a panoramic photo wall with this new generation of cheap panels, but the 1” bars will be annoying, though tolerable from a distance. But does it have to be?

There are 1/4” bezel monitors made for the video wall industry, but it’s all very high end, and in fact it’s hard to find these monitors for sale on the regular market from what I have seen. If they are, they no doubt cost 2-3x as much as “specialty” market monitors. I really think it’s time to push multi-monitor as more than a specialty market.

I accept that you need to have something strong supporting and protecting the edge of your delicate LCD panel. But we all know from laptops it doesn’t have to be that wide. So what might we see?

  • Design the edges of the monitor to interlock, and have the supporting substrate further back on the left and further forward on the right. Thus let the two panels get closer together. Alternately let one monitor go behind the other and try to keep the distance to a minimum.
  • Design monitors that can be connected together by removing the bezel and protection/mounting hardware and carefully inserting a joiner unit which protects the edges of both panels but gets them as close together as it can, and firmly joins the two backs for strength. May not work as well for 2x2 grids without special joiners.
  • Just sell a monitor that has 2, 3 or 4 panels in it, mounted as close as possible. I think people would buy these, allowing them to be priced even better than two monitors. Offer rows of 1, 2 or 3 and a 2x2 grid. I will admit that a row of 4, which is what I want, is not likely to be as big a market.
  • Sell components to let VARs easily build such multi-panel monitors.

When it comes to multi-panel, I don’t know how close you could get the panels but I suspect it could be quite close. So what do you put in the gap? Well, it could be a black strip or a neutral strip. It could also be a translucent one that deliberately covers one or two pixels on each side, and thus shines and blends their colours. It might be interesting to see how much you could reduce visual effect of the gap. The eye has no problem looking through grid windows at a scene and not seeing the bars, so it may be that bars remain the right answer.

It might even be possible to cover the gap with a small thin LCD display strip. Such a strip, designed to have a very sharp edge, would probably go slightly in front of the panels, and appear as a bump in the screen — but a bump with pixels. From a distance this might look like a video wall with very obscured seams.

For big video walls, projection is still a popular choice, other than the fact that such walls must be very deep. With projection, you barely need the bezel at all, and in fact you can overlap projectors and use special software to blend them for a completely seamless display. However, projectors need expensive bulbs that burn out fairly quickly in constant use, so they have a number of downsides. LCD panel walls have enough upsides that people would tolerate the gaps if they can be made small using techniques above.

Anybody know how the Barco wall at the Comcast center is done? Even in the video from people’s camcorders, it looks very impressive.

If you see LCD panels larger than 24” with thin bezels (3/8 inch or less) at a good price (under $250) and with a good quality panel (doesn’t change colour as you move your head up and down) let me know. The Samsung 2443 looked good until I learned that it, and many others in this size, have serious view angle problems.

Flashforward, Deja Vu and Hollywood's problem with time travel

Tonight I watched the debut of FlashForward, which is based on the novel of the same name by Rob Sawyer, an SF writer from my hometown whom I have known for many years. However, “based on” is the correct phrase because the TV show features Hollywood’s standard inability to write a decent time travel story. Oddly, just last week I watched the fairly old movie “Deja Vu” with Denzel Washington, which is also a time travel story.

Hollywood absolutely loves time travel. It’s hard to find a Hollywood F/SF TV show that hasn’t fallen to the temptation to have a time travel episode. Battlestar Galactica’s producer avowed he would never have time travel, and he didn’t, but he did have a god who delivered prophecies of the future which is a very close cousin of that. Time travel stories seem easy, and they are fun. They are often used to explore alternate possibilities for characters, which writers and viewers love to see.

But it’s very hard to do it consistently. In fact, it’s almost never done consistently, except perhaps in shows devoted to time travel (where it gets more thought) and not often even then. Time travel stories must deal with the question of whether a trip to the past (by people or information) changes the future, how it changes it, who it changes it for, and how “fast” it changes it. I have an article in the works on a taxonomy of time travel fiction, but some rough categories from it are:

  • Calvinist: Everything is cast, nothing changes. When you go back into the past it turns out you always did, and it results in the same present you came from.
  • Alternate world: Going into the past creates a new reality, and the old reality vanishes (at varying speeds) or becomes a different, co-existing fork. Sometimes only the TT (time traveler) is aware of this, sometimes not even she is.
  • Be careful not to change the past: If you change it, you might erase yourself. If you break it, you may get a chance to fix it in some limited amount of time.
  • Go ahead and change the past: You won’t get erased, but your world might be erased when you return to it.
  • Try to change the past and you can’t: Some magic force keeps pushing things back the way they are meant to be. You kill Hitler and somebody else rises to do the same thing.

Inherent in several of these is the idea of a second time dimension, in which there is a “before” the past was changed and an “after” the past was changed. In this second time dimension, it takes time (or rather time-2) for the changes to propagate. This is mainly there to give protagonists a chance to undo changes. We see Marty Mcfly slowly fade away until he gets his parents back together, and then instantly he’s OK again.

In a time travel story, it is likely we will see cause follow effect, reversing normal causality. However, many writers take this as an excuse to throw all logic out the window. And almost all Hollywood SF inconsistently mixes up the various modes I describe above in one way or another.

Spoilers below for the first episode of FlashForward, and later for Deja Vu.

Update note: The fine folks at io9 asked FlashForward’s producers about the flaw I raise but they are not as bothered by it.  read more »

No, I don't want to participate in a customer satisfaction survey every time

It seems that with more and more of the online transactions I engage in — and sometimes even when I don’t buy anything — I will get a request to participate in a customer satisfaction survey. Not just some of the time in some cases, but with every purchase. I’m also seeing it on web sites — sometimes just for visiting a web site I will get a request to do a survey, either while reading, or upon clicking on a link away from the site.

On the surface this may seem like the company is showing they care. But in reality it is just the marketing group’s thirst for numbers both to actually improve things and to give them something to do. But there’s a problem with doing it all the time, or most of the time.

First, it doesn’t scale. I do a lot of transactions, and in the future I will do even more. I can’t possibly fill out a survey on each, and I certainly don’t want to. As such I find the requests an annoyance, almost spam. And I bet a lot of other people do.

And that actually means that if you ask too much, you now will get a self-selected subset of people who either have lots of free time, or who have something pointed to say (ie. they got a bad experience, or perhaps rarely a very good one.) So your survey becomes valueless as data collection the more people you ask to do it, or rather the more refusals you get. Oddly, you will get more useful results asking fewer people.

Sort of. Because if other people keep asking everybody, it creates the same burn-out and even a survey that is only requested from 1 user out of 1000 will still see high rejection and self-selection. There is no answer but for everybody to truly only survey a tiny random subset of the transactions, and offer a real reward (not some bogus coupon) to get participation.

I also get phone surveys today from companies I have actually done business with. I ask them, “Do you have this survey on the web?” So far, they always say no, so I say, “I won’t do it on the phone, sorry. If you had it on the web I might have.” I’m lying a bit, in that the probability is still low I would do it, but it’s a lot higher. I can do a web survey in 1/10th the time it takes to get quizzed on the phone, and my time is valuable. Telling me I need to do it on the phone instead of the web says the company doesn’t care about my time, and so I won’t do it and the company loses points.

Sadly, I don’t see companies learning these lessons, unless they hire better stats people to manage their surveys.

Also, I don’t want a reminder from everybody I buy from on eBay to leave feedback. In fact, remind me twice and I’ll leave negative feedback if I’m in a bad mood. I prefer to leave feedback in bulk, that way every transaction isn’t really multiple transactions. Much better if ebay sends me a reminder once a month to leave feedback for those I didn’t report on, and takes me right to the bulk feedback page.

Panoramas of Burning Man 2009

I have put up a gallery of panoramas for Burning Man 2009. This year I went with the new Canon 5D Mark II, which has remarkable low-light shooting capabilities. As such, I generated a number of interesting new night panoramas in addition to the giant ones of the day.

In particular, you will want to check out the panorama of the crowd around the burn, as seen from the Esplanade, and the night scene around the Temple, and a twilight shot.

Below you see a shot of the Gothic Raygun Rocket, not because it is the best of the panoramas, but because it is one of the shortest and thus fits in the blog!

Some of these are still in progress. Check back for more results, particularly in the HDR department. The regular sized photos will also be processed and available in the future.

Finally, I have gone back and rebuilt the web pages for the last 5 years of panoramas at a higher resolution and with better scaling. So you may want to look at them again to see more detail. A few are also up as gigapans including one super high-res 2009 shot in a zoomable viewer.

Events: Randall Monroe (xkcd) tonight in SF, Singularity Summit Oct 3-4 in NYC

Two events I will be at…

Tonight, at 111 Minna Gallery in San Francisco, we at EFF will be hosting a reading by Randall Monroe, creator of the popular nerd comic “xkcd.” There is a regular ticket ($30) and a VIP reception ticket ($100) and just a few are still available. Payments are contributions to the EFF.

In two weeks, on Oct 3-4, I will be speaking on the future of robot cars at the Singularity Summit in New York City. Lots of other good speakers on the podium too.

See you there…

Burning Man Exodus, Part II

Two years ago, I discussed solutions for Burning Man Exodus. The problem: Get 45,000 people off the playa in 2 days, 95% of them taking a single highway south which goes through a small town which has a chokepoint capacity of about 450 cars/hour. Quite often wait times to get onto the road are 4 hours or more, though this year things were smoother (perhaps due to a lower attendance) and the number of people with 4 hour waits was lower. In a bad year, we might imagine that 25,000 people wait an average of 3 hours, or 75,000 person hours, almost 40 man-years of human labour.

Some judge my prior solution, with appointments, as too complex. Let’s try something which is perhaps simpler, at least at its base, though I have also thought up some complexities that may have value.

When you are ready to leave, drive to the gate. There, as was tried in 2,000, you would be directed into a waiting lot, shaped with cones at the front. The lot would have perhaps 20 rows of 10 cars (around 150 vehicles as there are so many trailers and RVs.) The lot would have a big number displayed. There you would park. You would then have three options:

  1. Stay in the lot and party with the other people in the lot, or sit in your car. This is in fact what you would do in the current situation, except there you start your engine and go forward 30 feet every minute. Share leftover food. Give donations to DPW crew. Have a good time.
  2. Go to the exodus station near the parking lots. Get a padded envelope and write your address on it, and your plate number, DL number and car description. Put your spare set of keys in the envelope. Get on your bike, or walk back to the city, and have a good time there. Listen to Exodus Radio. They will give reports on when your lot is going to move, in particular a 30 minute warning. When you get it, go back, pick up your keys and get ready.
  3. Volunteer to help with city cleanup. Do that by driving to the premium section of the waiting lot. Park there, wait a bit, and then get on a bus which takes you somewhere to do an hour shift of clean-up. You moop check the playa, clean, take down infrastructure, or spend an hour doing Exodus work which you trained for earlier. At the end of your shift, you are free to take a bus back to the lot, or wait in the city with friends. Listen to Exodus Radio. They will call your premium lot. It will be called well before the regular lot. Ideally give an hour, gain an hour! Get there and be ready.

When your lot is called, the Exodus worker pulls back the cones and the lanes stream out, non-stop (but still 10mph) off the playa. The road does not have to be lengthened to hold more cars. At the blacktop entrance, an Exodus worker with a temporary traffic light has it set to a green left arrow except when other traffic is coming, when it’s red. You turn without hesitation (people do that on green arrows, but slow down for flag workers.) Off you go.

Keys

As noted, it seems a good idea that people who want to leave the lot leave a set of keys. Not their only set — it is foolish to bring only one set to the playa anyway, and if you read the instructions you knew this. This allows exodus workers to easily move vehicles for people who don’t return, and there will be some. Even so the lots should be designed so it’s not hard to get around them. If the first lane has a spare lane to the other direction that works. It does require somebody to hand back the keys. If you read the instructions, they will say to bring photos of yourself (and alternate drivers.) Tape that photo to the key envelope and it makes it very quick and easy for the key wrangler to hand you the right keys. Don’t bring a photo and they must confirm a DL number, which they won’t have time to do if time is short — so get there in plenty of time.

If you don’t get there in time to get your keys, you can wait, or you can pay $10 (or whatever it costs) and the BM Org will mail you the keys after the event. Of course with rental vehicles this is not an option, so be there early.

However, it may also be simpler to not do the key system, and tow people who don’t show up, and charge them a fat fee for that. Or tow those who don’t leave a key. People might leave a fake key, which would result in a tow and an even larger fine, perhaps. As such I am not wedded to the key desk idea and it may be simpler to first see if no-shows are a big problem. No-shows can be punished in lots of ways if they signed a contract before leaving.

There is an issue for people who do volunteer work and then head for the city. They need to have left keys before the volunteer shift, or return to the lot to leave them, or not leave them and risk a tow.

Volunteers

Volunteers would get a leader who directs them what they will be doing. A common task will be doing a playa walk/MOOP sweep. The leader will listen to Exodus Radio and know if things move quickly and the volunteers must return. Normally, however, volunteer shifts would be taken only when the line is very long, much longer than a volunteer shift. People can of course offer to do more than one shift when the line is long but in that case they should bring their own portable radio, just as people who leave the lot should bring one or be near one. The shift leaders could also have a radio on loud enough for all to hear, hopefully the DJ will be doing something fun between exodus lot announcements.

As noted, one of the things people can volunteer for is exodus work itself. The offer of early exodus in exchange for an hour of exodus work assures there can never be a shortage of workers as long as there is a base of workers that does it without that reward. You’re helping the people ahead of you in line get out earlier. However, regular (non-leaving) volunteers are needed for when the line is short and first bunches up, and for when it shortens again.

To do exodus work you would have to attend training in advance, and be certified as able to do it. Probably done in SF, but possibly on-playa. Some other volunteer jobs (such as cleanup crew leader) would require some training and approval.

Staff needed are

  • An exodus DJ (in a tower overlooking the line and the lots) with assistant or two who are controlling the whole operation.
  • Flag worker controlling the traffic light at the blacktop. Possibly others in Gerlach.
  • 2 crews of 1-2 workers directing cars into the lot currently filling up. They also prepare the lot, replacing the exit cones and possibly moving no-show cars to the side. May have a golf cart.
  • 1-2 workers diverting cars from the main exit lane merge (the “fallopian tubes”) to the staging lots when needed. A cop would be very handy here.
  • 1 worker to remove the cones at the lot being emptied and wave cars out of it. (The Exodus DJ is also telling those people to get going.) When only one lane is left, this person moves to the next lot. Worker probably has a scooter or golf cart.
  • 1-2 workers to man the key desk.

Police

The police come in huge numbers and spend a lot of time on victimless crimes. Managing traffic is a a great way to make really effective use of their police powers. Police can be there to deal with people who ignore signs, bypass or cut out of lots, or who leave their car without doing a key drop or contract.

How to start the lots

It is an interesting problem how to start the lots close to the city. Initially the volume is low and people exit directly, and will tend to go in multiple lanes without a lot of work, eager as faster vehicles will be to pass slow ones. Eventually they will bunch up at the forced merge, and then the bunch up will spread backwards, traffic-jam style. However, this is taking place three miles from the city, at least 15 minutes drive at 10mph. There is a magic amount of back-up at which point you should start holding cars, and then a point at which you should release a lot full of them. Fortunately any short gaps you put in the stream are not wasted as they are re-smoothed on the blacktop before Gerlach-Empire, which is believed to be the primary choke point. However, it will take experience to learn the exact right times, so the first year will not do as well as later years. Data has been kept on car counts from the past, presumably broken down by hour, which could help.

So what would it cost to allow pre-existing conditions?

There is a number that should not be horribly hard to calculate by the actuaries of the health insurance companies. In fact, it’s a number that they have surely already calculated. What would alternate health insurance systems cost?

A lot of confusion in the health debate concerns two views the public has of health insurance. On the one hand, it’s insurance. Which means that of course insurers would not cover things like most pre-existing conditions. Insurance is normally only sold to cover unknown risk in every other field. If your neighbours regularly shoot flaming arrows onto your house, you will not get fire insurance to cover that, except at an extreme price. Viewed purely as insurance, it is silly to ask insurance companies to cover these things. Or to cover known and voluntary expenses, like preventative care, or birth control pills and the like. (Rather, an insurance company should decide to raise your prices if you don’t take preventative care, or allocate funds for the ordinary costs of planned events, because they don’t want to cover choices, just risks.)

However, we also seek social goals for the health insurance system. So we put rules on health insurance companies of all sorts. And now the USA is considering a very broad change — “cover everybody, and don’t ding them for pre-existing conditions.”

From a purely business standpoint, if you don’t have pre-existing conditions, you don’t want your insurance company to cover them. While your company may not be a mutual one, in a free market all should be not too far off the range of such a plan. Everything your company covers that is expensive and not going to happen to you raises your premiums. If you are a healthy-living, healthy person, you want to insure with a company that covers only such people’s unexpected illnesses, as this will give you the lowest premiums by a wide margin.

However, several things are changing the game. First of all, taxes are paying for highly inefficient emergency room care for the uninsured, and society is paying other costs for a sick populace, including the spread of disease. Next, insurance companies have discovered that if the application process is complex enough, then it becomes possible to find a flaw in the application of many patients who make expensive claims, and thus deny them coverage. Generally you don’t want to insure with a company that would do this: while your premiums will be lower, it is too hard to predict if this might happen to you. The more complex the policy rules, the more impossible it is to predict. However, it is hard to discover this in advance when buying a policy, and hard to shop on.

But when an insurance company decides on a set of rules, it does so under the guidance of its actuaries. They tell the officers, “If you avoid covering X, it will save us $Y” and they tell it with high accuracy. It is their job.

As such, these actuaries should already know the cost of a system where a company must take any client at a premium decided by some fairly simple factors (age being the prime one) compared to a system where they can exclude or surcharge people who have higher risks of claims. Indeed, one might argue that while clearly older people have a higher risk of claims, that is not their fault, and even this should not be used. Every factor a company uses to deny or surcharge coverage is something that reduces its costs (and thus its premiums) or they would not bother doing it.

On the other hand, elimination of such factors of discrimination would reduce costs in selling policies and enforcing policies, though not enough to make up for it, or they would already do it, at least in a competitive market. (It’s not, since any company that took all comers at the same price would quickly be out of business as it would get only the rejects of other companies.)

Single payer systems give us some suggestion on what this costs, but since they all cost less than the current U.S. system it is hard to get guidance. They get these savings for various reasons that people argue about, but not all of them translate into the U.S. system.

There is still a conundrum in a “sell to everybody” system. Insurance plans will still compete on how good the care they will buy is. What doctors can you go to? HMO or PPO? What procedures will they pay for, what limits will they have? The problem is this: If I’m really sick, it is very cost effective for me to go out and buy a very premium plan, with the best doctors and the highest limits. Unlike a random person, I know I am going to use them. It’s like letting people increase the coverage on their fire insurance after their house is on fire. If people can change their insurance company after they get sick then high-end policies will not work. This leaves us back at trying to define pre-existing conditions, and for example allowing people only to switch to an equivalent-payout plan for those conditions, while changing the quality of the plan on unknown risks. This means you need to buy high-end insurance when you are young, which most people don’t. And it means companies still have an incentive to declare things as pre-existing conditions to cap their costs. (Though at least it would not be possible for them to deny all coverage to such customers, just limit it.)

Some would argue that this problem is really just a progressive tax — the health plans favoured by the wealthy end up costing 3 times what they normally would while poorer health plans are actually cheaper than they should be. But it should put pressure on all the plans up the chain, as many poor people can’t afford a $5,000/month premium plan no matter that it gives them $50,000/month in benefits, but the very wealthy still can. So they will then switch to the $2,000/month plan the upper-middle class prefer, and go broke paying for it, but stay alive.

Or let’s consider a new insurance plan, the “well person’s insurance” which covers your ordinary medical costs, and emergencies, but has a lifetime cap of $5,000 on chronic or slow-to-treat conditions like cancer, diabetes and heart disease. You can do very well on this coverage, until you get cancer. Then you leave the old policy and sign up for premium coverage that includes it, which can’t be denied in spite of your diagnosis.

This may suggest that single-payer may be the only plan which works if you want to cover everybody. But single-payer (under which I lived for 30 years in Canada) is not without its issues. Almost all insurance companies ration care, including single payer ones, but in single payer you don’t get a choice on how much there will be.

However, it would be good if the actuaries would tell us the numbers here. Just what will the various options truly cost and what premiums will they generate? Of course, the actuaries have a self-interest or at least an employer’s interest in reporting these numbers, so it may be hard to get the truth, but the truth is at least out there.

Damn it, I didn't mean to power you on.

Yes, any system which is going to engage in some long activity which will freeze up the system for more than a few seconds should offer a way to cancel, abort or undo it. You would think designers would know that by now.

My latest peeve is cell phones and other smart devices which are complex enough to “boot.” now. In many cases if you want to see if they are on or not, you touch the power button — and if they were not on, they start their 30 to 60 second boot process. Which you must wait through so that you can then turn them off again. On some devices there is still a physical power button (and on many laptops you can fake one by holding down the soft power button for 4 seconds) but that’s not a great solution. Sure, at some point the booting device reaches a state where it can’t easily abort the boot as it is writing state, but this usually takes at least several seconds if not much longer to reach, so you should be able to abort right away.

Are Frequent Flyer Mile credit cards a good idea?

I just decided to cancel my AAdvantage credit card for a 1% cashback card with no annual fee. Many people have the frequent flyer cards so let’s consider the math on them. They typically come with a high annual fee (around $80) while other cards have no fee and other rewards.

Let’s say you spend $25,000 per year on the card, which is enough for 25,000 miles or one domestic flight on the typical airline. With a typical cashback card you get 1% back though some cards give 2% or even 4% back on certain classes of purchases. I have an Amex from Costco that gives 3% on gasoline and 2% on travel expenses, but Amex is not as accepted as Visa or MC.

  • Your cash cost for the 25K miles is $250 plus the $80 annual fee = $320
  • There are varying taxes and fees on award tickets, as low as $8 but sometimes much higher
  • If you are booking less than 3 weeks in advance, fees of $50 to $100 will apply
  • Finding available award seats can be quite difficult, the supply is far lower than for cash seats in most cases. There are also blackouts.
  • You will not receive miles for your trip. A typical cross-country return is 5,000 miles, of $50 at the 1% rate, $80-$100 at the rate airlines claim
  • Most people use miles long after they earn them, and in fact have a large balance. So a time discount should apply. Miles sitting in accounts earn no interest, cash does.

As such the free trip is harder to get and costs $400 to $500. But that is not far from (and sometimes more than) the cash price of a ticket. But cash is of course a much more flexible thing — you can use it for anything, not just airline tickets. There are a raft of cards out there now which tout “miles on any airline” and what they really give you is a 1% cashback that is only good on airlines. General 1% cashback is much better.

There is an argument that upgrades do much better. Upgrading with miles can be cheaper than upgrading with cash, since the cash price of business class seats is very high. However, as you learn if you are not a top elite flyer, upgrades are quite hard to get. Others are ahead of you in line. AA also instituted a cash co-pay on upgrades making them more expensive than before when done with miles.

If you spend less than $25K per year on the card, the math gets even worse. At $12.5K per year, you gave up at least $460 to $550 for your free ticket, and when the tickets are available on miles, the cash fare is often lower. If you spend much more a year, the cost may make some sense.

A common trick for people who have mileage cards is to pick up group checks at restaurants and have everybody pay you cash. However, the cards that give 3% cashback at restaurants like the Amex are much better for this.

RV daisy chain power grid

After every RV trip (I’m back from Burning Man) I think of more I want RVs to do. This year, as we have for many years, we built a power distribution system with a master generator rather than having each RV run its own noisy, smelly and inefficient generator. However, this is expensive and a lot of work for a small group, it is cheap and a lot of work for a larger group.

There’s been a revolution in small generator design of late thanks to the declining cost of inverters and other power conversion. A modern quality generator feeds the output of its windings to circuits to step up and step down the voltage to produce the required power. The output power is cleaner and more stable, and the generator is spun at different RPMs based on the power load, making it quieter and more efficient. With many models, you can also combine the internal output of two generators to produce a higher power generator.

RVs have come with expensive old-style generators that are quieter than cheap ones, and which produce better power, but today they are moving to inverter generators. With an inverter generator, it’s also possible to draw on the RV batteries for power surges (such as starting an AC or microwave) beyond what the generator can do.

I’m interested in the potential for smarter power, so what I would like to see is a way for a group of RVs with new generation power systems to plug together. In this way, they could all make use of the power in the other vehicles, and in most cases only a fraction of the generators would need to be running to provide power to all. (For example, at night, only one generator could power a whole cluster. In the day, with ACs running, several would need to run, but it would be very unlikely to have to run all, or even 75% of them.)  read more »