Networking in Paradise... In response to a reader's question: the network cable tester I have is the Fluke MS2-100, pictured at right. It has a basic TDR (Time Domain Reflectometer) built in – no analog display, but it tells you the wire distance from the meter to any problem. It detects opens, shorts, and pairing. Having this thing in my toolkit has saved me hours of manual troubleshooting. Just on this job I've used it to tell me exactly where three separate wiring problems were, and to verify that the complete installation is working correctly. Highly recommended!
There's one other challenge to my networking here that I haven't mentioned before. The cable modem and main router for my house are located in Debbie's second floor office, and powered from the house electrical power. To get Internet in my shed, I've run CAT-6 all the way from that router out into the shed. The challenge is that the ground wires on that Ethernet cable are using the house's power ground – and the shed (including the network equipment out there) is on its own ground (because it has a completely separate AC main, including it's own transformer and meter).
If you've ever done any utility-side electrical work, you can anticipate my challenge: it's the classic “ground loop” problem. In my case, it's exacerbated by the fact that I have high current intermittent loads in the shed – things like a welder, 5 HP air compressor, etc. If I tried to connect the house Ethernet to the shed Ethernet, I'm sure to have large transient ground loop currents between them – and quite likely fry some equipment!
The classic solution for this sort of problem is electrical isolation (between the house and shed, in my case). I've never done this for Ethernet before (never needed to!), so I didn't know what was available. It turns out that medical equipment with network connections routinely deals with this, and there are parts readily available. I chose a Black Box SP426A “Ethernet Isolator”, pictured above left. This is an optoelectronic device that's powered from the Ethernet line, very conveniently for me. Mine should arrive tomorrow, and at that point I can actually install the router, switch, and wireless router in my shed...
Thursday, November 19, 2015
Paradise ponders...
Paradise ponders... Yesterday I spent a good part of the day in small and dark places :) Some of it was in the attic, crawling around to locate the top of the wall (in Debbie's office) through which I wanted to run the network cables. This was much more challenging than I had imagined it would be, for two reasons.
First, the wall in question isn't structural; it's just a dividing wall between two rooms. That matters because that means there's no corresponding structure in the attic – in fact, nothing visible in the attic at all to indicate where that wall might be. Precisely where it was actually matters a great deal, as I needed to drill a hole through the 2x4 at the top of that wall – and my target area for that hole was 3.5" wide by 8" long. That's not a very big target!
Second, the attic is completely filled with blown-in insulation, right to the tops of the 2x12 joists. That means that everything in the attic that might give me a visual cue (like wires, nails, etc.) is completely covered up with the insulation, rendering it invisible.
How could I find my drilling target? The only way I could think of is to measure from the one reference point I had that was visible both on the second floor and in the attic: the little hole that I crawled up to the attic in. That hole is about 12' east of the target wall, and about 2' south. So I did some very careful measuring on the second floor, then went up into the attic and duplicated it. That put me right between two joists (mounted north/south) and two big rectangular air ducts (going east/west). I dug through the insulation, marked an “X”, and drilled – then went down to the second floor to see if I'd drilled a hole through the ceiling. Nope! Apparently I actually hit the target! Yay!
At that point I cut a hole in the wallboard (photo above), “fished” the cable down toward the hole, and Debbie pulled it out. Victory!
But we still had one more challenge. One of the network cables was intended for a wireless router to be located in our kitchen. The wall there that I wanted to run the cable through was just barely accessible from our mechanical room in the basement. But, once again, I had no easy way to locate it. This was actually a tad more difficult than the attic location problem, as this time there wasn't a nice convenient common reference point. I ended up using the north and the east exterior walls as a reference. The east wall was nearly 20' away, in a different room both on the first floor and in the basement – but even so, it was the best reference I had. Once I located the place where I wanted the cable, I discovered that a huge steel air duct was blocking my access. Dang it! Then I had another idea: I could drill in from about a 45° angle, with a 20" long drill bit, and I could make it into the right area. That was a little scary making that hole – if I was off by even a couple inches, I'd be drilling into either a (very) visible area, or into a kitchen cabinet. Yikes! But I drilled away, and the hole came out within a quarter inch of where I intended it. Yay!
Shortly after that, I had everything wired up for the wireless router, and fired it up. Oops. It didn't work. Out came the cable tester, and I soon discovered that one wire was broken. The cable tester tells me where the problem is – and this time, it was in the female connector installed in the second floor wall (the photo above). On inspection I found a broken wire. All I needed to do was rewire it, and everything was working. And now we have 5 bars of WiFi throughout our house, including in our bedroom. Hooray!
Elray the well driller had a very successful day. His attempts to develop the water layer at 321' were successful. By the time he left yesterday afternoon he had almost completely cleaned out the area after having opened up the water bearing seams (with compressed air). The result: 30 GPM of clear water, no detectable odors, at 54°F. He's not going to be here today, but tomorrow he anticipates finishing the development work, pulling up the outer casing, and sealing the well. Then on Saturday or Monday he'll be pulling his rig out.
The next stage for us will be to put in a low-capacity pump, wire it up (to the shed), run a water line to the shed, and then put some infrastructure in the shed. I'm planning a 2,000 gallon cistern in there, with a float valve that controls the well pump. That can be filled at a low rate – probably under 5 GPM – which will help keep pump costs down. There will be a water softener and (if needed) iron removal system between the pump and the cistern. Then after the cistern there will be a booster pump and pressure tank. One potential variation on this scheme is to have a concrete cistern underground, outside the shed. I need to check into the feasibility of that. We have that setup for the spring that feed our house water, and it works well.
First, the wall in question isn't structural; it's just a dividing wall between two rooms. That matters because that means there's no corresponding structure in the attic – in fact, nothing visible in the attic at all to indicate where that wall might be. Precisely where it was actually matters a great deal, as I needed to drill a hole through the 2x4 at the top of that wall – and my target area for that hole was 3.5" wide by 8" long. That's not a very big target!
Second, the attic is completely filled with blown-in insulation, right to the tops of the 2x12 joists. That means that everything in the attic that might give me a visual cue (like wires, nails, etc.) is completely covered up with the insulation, rendering it invisible.
How could I find my drilling target? The only way I could think of is to measure from the one reference point I had that was visible both on the second floor and in the attic: the little hole that I crawled up to the attic in. That hole is about 12' east of the target wall, and about 2' south. So I did some very careful measuring on the second floor, then went up into the attic and duplicated it. That put me right between two joists (mounted north/south) and two big rectangular air ducts (going east/west). I dug through the insulation, marked an “X”, and drilled – then went down to the second floor to see if I'd drilled a hole through the ceiling. Nope! Apparently I actually hit the target! Yay!
At that point I cut a hole in the wallboard (photo above), “fished” the cable down toward the hole, and Debbie pulled it out. Victory!
But we still had one more challenge. One of the network cables was intended for a wireless router to be located in our kitchen. The wall there that I wanted to run the cable through was just barely accessible from our mechanical room in the basement. But, once again, I had no easy way to locate it. This was actually a tad more difficult than the attic location problem, as this time there wasn't a nice convenient common reference point. I ended up using the north and the east exterior walls as a reference. The east wall was nearly 20' away, in a different room both on the first floor and in the basement – but even so, it was the best reference I had. Once I located the place where I wanted the cable, I discovered that a huge steel air duct was blocking my access. Dang it! Then I had another idea: I could drill in from about a 45° angle, with a 20" long drill bit, and I could make it into the right area. That was a little scary making that hole – if I was off by even a couple inches, I'd be drilling into either a (very) visible area, or into a kitchen cabinet. Yikes! But I drilled away, and the hole came out within a quarter inch of where I intended it. Yay!
Shortly after that, I had everything wired up for the wireless router, and fired it up. Oops. It didn't work. Out came the cable tester, and I soon discovered that one wire was broken. The cable tester tells me where the problem is – and this time, it was in the female connector installed in the second floor wall (the photo above). On inspection I found a broken wire. All I needed to do was rewire it, and everything was working. And now we have 5 bars of WiFi throughout our house, including in our bedroom. Hooray!
Elray the well driller had a very successful day. His attempts to develop the water layer at 321' were successful. By the time he left yesterday afternoon he had almost completely cleaned out the area after having opened up the water bearing seams (with compressed air). The result: 30 GPM of clear water, no detectable odors, at 54°F. He's not going to be here today, but tomorrow he anticipates finishing the development work, pulling up the outer casing, and sealing the well. Then on Saturday or Monday he'll be pulling his rig out.
The next stage for us will be to put in a low-capacity pump, wire it up (to the shed), run a water line to the shed, and then put some infrastructure in the shed. I'm planning a 2,000 gallon cistern in there, with a float valve that controls the well pump. That can be filled at a low rate – probably under 5 GPM – which will help keep pump costs down. There will be a water softener and (if needed) iron removal system between the pump and the cistern. Then after the cistern there will be a booster pump and pressure tank. One potential variation on this scheme is to have a concrete cistern underground, outside the shed. I need to check into the feasibility of that. We have that setup for the spring that feed our house water, and it works well.
Wednesday, November 18, 2015
Paradise ponders...
Paradise ponders... This morning I built the seconds counter on my clock kit (photo of that section at right). It all worked on the first try. When I put my 'scope on the output of the 2^3 flip-flop, I saw a “0” for 8 seconds and a “1” for 2 seconds, repeating in that 10 second cycle. That's exactly what I should see there, because that flip-flop is only set when the seconds counter contains an 8 or a 9 – which it does for 2 seconds out of every 10. The other three flip-flops in the counter also had the expected patterns. My next assembly effort will be the seven-segment decoder logic, the seven-segment LED driver, and the LED itself. When I get that done, I'll see the seconds for the clock counting up!
Yesterday I started installing some network cables in the house. The first step was to run two CAT-6 cables from the basement “mechanical room” up into the attic. I ran them alongside the chimney, where there's already quite an assortment of pipes and wires running. Today I'm hoping to run them from the attic down through a wall in our second floor office, where I'll terminate them in a wall panel. One of those wires I'll be connecting to the underground CAT-6 that runs out to the barn; the other I'll be running up through a wall in the kitchen, to attach to a second wireless router for the house. Our WiFi on the first floor (especially in our bedroom) is kind of shaky, so we're hoping this will fix it.
We took Debbie in for her first treatment with a transdermal steroid patch. This is designed to attack her patella tendinitis. The patch contains a battery that uses an electric field to drive the drug down through her skin into the tendon. The physical therapist there noted that Debbie's extension in her injured leg isn't quite as good as in the uninjured leg, and he's pretty sure that's the root cause of her tendinitis. We got a bunch of exercises for her to do, all with the objective of improving that extension. She's hard at work on them already :)
Yesterday I started installing some network cables in the house. The first step was to run two CAT-6 cables from the basement “mechanical room” up into the attic. I ran them alongside the chimney, where there's already quite an assortment of pipes and wires running. Today I'm hoping to run them from the attic down through a wall in our second floor office, where I'll terminate them in a wall panel. One of those wires I'll be connecting to the underground CAT-6 that runs out to the barn; the other I'll be running up through a wall in the kitchen, to attach to a second wireless router for the house. Our WiFi on the first floor (especially in our bedroom) is kind of shaky, so we're hoping this will fix it.
We took Debbie in for her first treatment with a transdermal steroid patch. This is designed to attack her patella tendinitis. The patch contains a battery that uses an electric field to drive the drug down through her skin into the tendon. The physical therapist there noted that Debbie's extension in her injured leg isn't quite as good as in the uninjured leg, and he's pretty sure that's the root cause of her tendinitis. We got a bunch of exercises for her to do, all with the objective of improving that extension. She's hard at work on them already :)
Suppose I told you...
Suppose I told you ... that there was a group of armed people in the U.S. who have (so far) killed over 1,000 people this year. Would that alarm you?
It certainly alarms me!
Well, there really is such a group – the cops.
It's remarkable how little press this phenomenon – a recent one – gets...
It certainly alarms me!
Well, there really is such a group – the cops.
It's remarkable how little press this phenomenon – a recent one – gets...
Charts in presentations...
Charts in presentations... This morning's Dilbert cartoon (below) triggered a memory of a conversation I once had with my company's CEO. I was, at the time, the Chief Technology Officer. I had been tasked with making a presentation to the Board about our software development process. In my presentation, I had a chart that showed the number of unresolved bugs in our main product declining over time. If you're a software company, a steadily declining number of unresolved (“open”) bugs is a really good thing. The CEO – my boss – was very unhappy with that chart. Why? Because the trend was down, and that (to him) by definition was negative. So he had me change out the chart for one that showed the resolved (“closed”) bug count, which of course went steadily up. My protestations that the closed bug count was the wrong measure fell upon deaf ears. I couldn't even get him to let me use the inverse of unresolved bugs (which would make the trend upwards), as he said that would be too hard to explain to the Board.
The result?
When I gave my presentation, two Board members reacted as my CEO hoped – they saw the upward trend and assumed life was good. The rest of the board – four or five members – all jumped on me for having a stupid metric in my presentation, and they proceeded to lecture me about the importance of tracking unresolved bugs.
I'm so glad to be retired! :)
The result?
When I gave my presentation, two Board members reacted as my CEO hoped – they saw the upward trend and assumed life was good. The rest of the board – four or five members – all jumped on me for having a stupid metric in my presentation, and they proceeded to lecture me about the importance of tracking unresolved bugs.
I'm so glad to be retired! :)
Tuesday, November 17, 2015
Paradise postcards...
Paradise postcards... Just a couple of scenes from our yard this morning. The first was taken looking west just before sunrise; the Wellsville Mountains were lit up, but the valley floor was not (and that's our shed on the left). The second was taken from the same spot, looking east. That's my friend Tim's alfalfa field, with his two horses very contentedly munching away on the 4 to 6 inches that's grown since the last mowing of the season. They sometimes hang over our fence (on the right) and look longingly into our kitchen :)
Electronics and wildlife!
Electronics and wildlife! Down under transplant, reader, friend, and former colleague Simon M. noted that the latest xkcd cartoon combines two of my favorite things: wildlife and electronics! When I saw the cartoon yesterday, I just smiled – it didn't occur to me that a lot of people wouldn't get it.
Red and yellow are two of the ten standard colors used for coding the value of components (especially resistors). It's a very old system, predating me considerably, and it's used worldwide. I've been familiar with it since the early 1960s, so it's second nature to me. Red is the code for 2, and yellow for 4, hence the reference to “24” in the cartoon. The omega (Ω) is the symbol for ohms, the unit of electrical resistance.
The “red touches yellow” is part of a rhyme for telling a coral snake apart from a king snake. This is important where both snakes coexist (like in Florida), as the coral snake is venomous, and the king snake is not. The complete rhyme:
Red and yellow are two of the ten standard colors used for coding the value of components (especially resistors). It's a very old system, predating me considerably, and it's used worldwide. I've been familiar with it since the early 1960s, so it's second nature to me. Red is the code for 2, and yellow for 4, hence the reference to “24” in the cartoon. The omega (Ω) is the symbol for ohms, the unit of electrical resistance.
The “red touches yellow” is part of a rhyme for telling a coral snake apart from a king snake. This is important where both snakes coexist (like in Florida), as the coral snake is venomous, and the king snake is not. The complete rhyme:
Red Touch Yellow - Kills a Fellow
Red Touch Black - Venom Lack
Yellow Touches Red - Soon You'll Be Dead
Red Touches Black - Friend of Jack
Monday, November 16, 2015
Paradise ponders...
Paradise ponders... Another busy day today! First we went to see Debbie's doctor. She's been having some pain in her knee, making it painful to walk – and to make progress in her recovery. Tendinitis in the patella tendon was the diagnosis, and she's going to start treatment for that tomorrow. The treatment is a steroid-infused patch for her knee, with a battery that drives the steroid from her skin into the tendon. Amazing medical technology these days! We're hoping for a fast cure for this latest challenge.
When we finished with the doctor's appointment, we headed out to the cabin we're buying near Newton. Today was the final walkthrough; our last chance to voice objections before we formally take possession. We were very pleasantly surprised – the sellers did a bang-up job cleaning up the mess that we saw on our last visit. We found absolutely nothing to worry about.
The next step after that happened later this afternoon: the formal “closing”. We've done this several times in California, and I did it once in Utah (for our Paradise home). Debbie had never before seen the difference between closing in California versus closing in Utah. The short version: California took a couple hours and something like 100 signatures. Utah took 7 minutes and 3 signatures. Done! Before we went into the title company office to do the closing (they do it here, not escrow companies as in California), I wired the money to their trust account. Three signatures and a handshake, and now we're the owners. So easy here, and so straightforward. The recording will happen either this afternoon or early tomorrow morning. After that, the process is completely done!
After we got home from the closing, I went out to talk with Elray the well driller. He worked away as we talked, and he told me he was hoping to get through a clay layer and into water-bearing sandstone shortly. A few minutes later, he did – and by the purest luck, I was there to see it. I stayed out with him for about an hour as he went through the process of deepening the hole into the sandstone, and backing out the drill by 25' or so to “proof” the well (testing to see if good, clear water was coming up). He's going to be proofing the rest of the day today, and part of tomorrow, but as of now it looks like we have good water – at 321'. If things still look good tomorrow, he's going to weld about 4 more feet of casing on top and pound it down so that the bottom of the casing is resting on top of the water-bearing sandstone. This will keep the water as clean as possible by keeping it out of the clay layer above the sandstone. All good!
When we finished with the doctor's appointment, we headed out to the cabin we're buying near Newton. Today was the final walkthrough; our last chance to voice objections before we formally take possession. We were very pleasantly surprised – the sellers did a bang-up job cleaning up the mess that we saw on our last visit. We found absolutely nothing to worry about.
The next step after that happened later this afternoon: the formal “closing”. We've done this several times in California, and I did it once in Utah (for our Paradise home). Debbie had never before seen the difference between closing in California versus closing in Utah. The short version: California took a couple hours and something like 100 signatures. Utah took 7 minutes and 3 signatures. Done! Before we went into the title company office to do the closing (they do it here, not escrow companies as in California), I wired the money to their trust account. Three signatures and a handshake, and now we're the owners. So easy here, and so straightforward. The recording will happen either this afternoon or early tomorrow morning. After that, the process is completely done!
After we got home from the closing, I went out to talk with Elray the well driller. He worked away as we talked, and he told me he was hoping to get through a clay layer and into water-bearing sandstone shortly. A few minutes later, he did – and by the purest luck, I was there to see it. I stayed out with him for about an hour as he went through the process of deepening the hole into the sandstone, and backing out the drill by 25' or so to “proof” the well (testing to see if good, clear water was coming up). He's going to be proofing the rest of the day today, and part of tomorrow, but as of now it looks like we have good water – at 321'. If things still look good tomorrow, he's going to weld about 4 more feet of casing on top and pound it down so that the bottom of the casing is resting on top of the water-bearing sandstone. This will keep the water as clean as possible by keeping it out of the clay layer above the sandstone. All good!
Paradise problem puzzled!
Paradise problem puzzled! Yesterday I posted about the clock kit I was building, and how the prescaler had a problem that needed to be troubleshot. Well, this morning I found the problem: a bad trace on the printed circuit board. I soldered in a jumper, about a quarter inch long, and presto! The prescaler is now working perfectly, giving me a beautiful 1 Hz (one pulse per second) signal. That 1 Hz signal will drive the seconds counter, which is the next part I'll be assembling.
I was surprised that it turned out to be a circuit board problem. There must have been a tiny break in the trace, but I couldn't see it under the solder mask. I found two components whose leads were very close together, that were supposed to be connected (but weren't), so the break had to be somewhere in the quarter inch or so between them. That little jumper did the trick nicely. Troubleshooting it was actually fairly easy: one component was a resistor that showed a signal on the end that was supposed to be connected to the base of a transistor. That base showed no signal at all. Straight wires (or circuit board traces) aren't supposed to behave like that :) Once I observed that anomaly, finding the actual cause was easy...
I was surprised that it turned out to be a circuit board problem. There must have been a tiny break in the trace, but I couldn't see it under the solder mask. I found two components whose leads were very close together, that were supposed to be connected (but weren't), so the break had to be somewhere in the quarter inch or so between them. That little jumper did the trick nicely. Troubleshooting it was actually fairly easy: one component was a resistor that showed a signal on the end that was supposed to be connected to the base of a transistor. That base showed no signal at all. Straight wires (or circuit board traces) aren't supposed to behave like that :) Once I observed that anomaly, finding the actual cause was easy...
“Why has this not been done before?”
“Why has this not been done before?” Neoneocon asks a most pertinent question about the French bombing of Raqqa, Syria:
Why on earth was this not done earlier? Was it because everyone was hoping the crocodile would eat them last?:In addition to lack of leadership and lack of will, there's also the delusional political correctness that seems to have taken over our institutions. It seems rather obvious that ISIS and al Qaeda are derived of Islam, and it's also true that most Muslims are not radical terrorists – but our “leaders” seem unable to recognize and accept this. Their dumbassed adherence to politically correct views of Islam is preventing any traction on the problem. Similarly, the oh-so-politically-correct views in Europe regarding open arms for Syrian immigrants is preventing them from getting any traction on their problem – though recent events in Paris may turn that attitude around...
The operation, carried out in coordination with U.S. forces, struck a command centre, recruitment centre for jihadists, a munitions depot and a training camp for fighters, it said. Activists inside Syria have suggested that no civilian casualties have been sustained in the Raqqa bombings.If that’s true, once again I ask: why has this not been done before?
Water supplies and electricity have reportedly been cut as a result of the air strikes, with activists claiming there has been ‘panic’ inside the city.
I understand the answer is “lack of leadership, lack of will.” But that doesn’t completely explain it, either. Perhaps the leaders of Europe (and Obama, naturally) were, among other things, deluded into thinking that ISIS hadn’t set its sights on the West and that the carnage would remain confined to the barbaric murder of a bunch of Arabs in Arab countries: Christians, but also Muslims who didn’t quite toe the proper ISIS line.
A shocking development...
A shocking development... MIT scientists have come up with a novel method for cleaning up water, including getting rid of the salt in salt water (desalination). Their method uses shock waves to concentrate dirty water on one side of a passage, and clean on the other. It doesn't use any membranes to get clogged, doesn't require high pressures or temperatures, and (most importantly) is vastly more energy-efficient than any current desalination method.
This is very clever engineering, and a great example of technological innovation that defies conventional wisdom. In this case, the assumption has long been that desalination was a high-energy process, and methods like reverse-osmosis that took less energy were complicated and high maintenance. Here these guys come along with a method that's basically careful banging on the pipes, turning conventional wisdom on its head and out-performing every other method. Awesome!
This is very clever engineering, and a great example of technological innovation that defies conventional wisdom. In this case, the assumption has long been that desalination was a high-energy process, and methods like reverse-osmosis that took less energy were complicated and high maintenance. Here these guys come along with a method that's basically careful banging on the pipes, turning conventional wisdom on its head and out-performing every other method. Awesome!
Sunday, November 15, 2015
Intel 4004...
Intel 4004... This was the very first microprocessor, and it has a special place in my memory. Today is the 44th anniversary of its announcement, on November 15, 1971. It wasn't immediately available; in fact, it wasn't available to ordinary individuals until about 3 years later. I don't remember the exact date, but sometime in 1974 – about 41 years ago – I bought one of these magnificent parts. Mine looked just like the photo above, with a ceramic case and gold-plated (literally!) pins and lid. It was an expensive part when sold at retail – over $100, as I recall. At the same time, I bought a kit from some long-gone company. It was a bag of parts and a schematic; the entire kit had to be wire-wrapped. The schematic was the key bit. I had never designed anything like a microprocessor before, and having a schematic was mighty comforting. There was also a PROM (programmable read-only memory) with a small test program. I put the thing together in a single evening, staying up until quite late to do it. The “input” was a set of four toggle switches and a momentary push button; the “output” was four LEDs. I fired it up, and it worked – first try! Then I spent weeks understanding what I had built, and what it could do.
After exhausting the things I could do with a 4004 (they were ... not very powerful), I then built an 8008 kit, an 8080 kit, and finally tried my own hand at designing with a Z80 board, a Motorola 6800, a Mostek 6502, and even a Motorola 68000. Somewhere along the way I also built a bit-slice machine, 16 bits wide based on four AMD 2901s. The 4004 launched all that learning for me, and, in a significant way, launched my career.
Happy birthday, little 4004!
After exhausting the things I could do with a 4004 (they were ... not very powerful), I then built an 8008 kit, an 8080 kit, and finally tried my own hand at designing with a Z80 board, a Motorola 6800, a Mostek 6502, and even a Motorola 68000. Somewhere along the way I also built a bit-slice machine, 16 bits wide based on four AMD 2901s. The 4004 launched all that learning for me, and, in a significant way, launched my career.
Happy birthday, little 4004!
Paradise ponders...
Paradise ponders... Just finished assembling the prescaler on my clock kit (photo at right). It doesn't work :) That's not surprising, given that I just loaded and soldered a hundred or so parts. I troubleshot it for a few minutes, and discovered that an “or” gate has one input permanently stuck low. My next job will be to figure out why that should be. It's fun to be doing electronics again, and it's even fun for me to troubleshoot. It's been a good many years since I've troubleshot digital logic at the component level – takes me back to my days in the Navy...
Our doctor in San Diego retired earlier than he'd planned to...
Our doctor in San Diego retired earlier than he'd planned to ... and ObamaCare was a contributing factor. Anecdotally we've heard of several other doctors doing the same thing, including one who changed careers from surgery to truck driving. They are not alone...
Our government's ineffectiveness isn't just a recent phenomenon...
Our government's ineffectiveness isn't just a recent phenomenon... One of the best examples I can think of to illustrate this is the fact that homeopathic “medicines” are still legally advertised and sold in the U.S. The notions underlying these quack remedies has been thoroughly debunked. By the 1940s, scientists and doctors knew for certain that at the very best homeopathic remedies were placebos. There is no disease or condition that any of them can help. We know this – and yet, the makers of homeopathic “remedies” are allowed to advertise them as effective.
Why is this? It's a combination of corruption (the homeopathic industry dispenses a lot of money in their lobbying) and political expediency (no politician wants to tell a mom that she can't get “medicine” for her baby – even if that “medicine” is utterly worthless).
If our dysfunctional national government can't even outlaw homeopathic “remedies”, how are they going to tackle something that's actually hard, like, say, immigration?
Why is this? It's a combination of corruption (the homeopathic industry dispenses a lot of money in their lobbying) and political expediency (no politician wants to tell a mom that she can't get “medicine” for her baby – even if that “medicine” is utterly worthless).
If our dysfunctional national government can't even outlaw homeopathic “remedies”, how are they going to tackle something that's actually hard, like, say, immigration?
Do it now!
Do it now! Friend, reader, and former colleague Simon M. passes along some excellent advice. However, I think his advice is just a wee bit too specific. You could insert the name and photo of any of the 2016 presidential candidates and it would be just as useful...Like a dead bug on a windshield...
Like a dead bug on a windshield... A delightful essay on the strangeness of English. A teaser:
Old English had the crazy genders we would expect of a good European language – but the Scandies didn’t bother with those, and so now we have none. Chalk up one of English’s weirdnesses. What’s more, the Vikings mastered only that one shred of a once-lovely conjugation system: hence the lonely third‑person singular –s, hanging on like a dead bug on a windshield. Here and in other ways, they smoothed out the hard stuff.Do go read the whole thing!
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