Dog-Proofing the Garden

April 6th, 2009

This will be the third year we’ve tried to have a garden. The first year we planted way too late for Las Vegas. (In February you should plant beets, carrots, lettuce, chard, cabbage, cauliflower & all their relatives. By March you should plant  watermelons, cantaloupes, squash, zucchini, pumpkins, gourds, cucumbers, and eggplant.) Most of what we planted stopped growing, long before it matured, when the heat of summer arrived. The second year we adopted a little dog who turned out to be quite a digger and chewer. I replaced most of the drip system at least twice, and most of the plants perished. This year we hope will be different. We’ve repaired the drip system, we’ve kept the dog out of the garden, and we’ve planted early.

Keeping the dog out was a little inconvenient. Being busy with other projects, I temporized a “gate,” which consisted of a piece of 3/4″ chip board that slid out from between our storage sheds to block the entrance along the side of the house. It was extremely heavy, and in using it for a few months, it left its mark in the stucco and more than a few splinters in my hands. I certainly had no intention of putting up with this arrangement as long as I did, but time has a way of slipping by. One weekend my wife and I agreed that if we were going to have a successful garden this year, we needed to have a more convenient gate or we probably wouldn’t visit and maintain it as often as we should.

I decided to model our new gate after the one on the other side of our house — a gate that has received a new coat of stain along with the new garden gate since this picture was taken.

The first step was to plant a gate post. I dug a post hole deep enough to bury two half cinder blocks stacked on their sides, filled the blocks and surrounding hole with concrete, and set  a pressure treated 4″ x 4″ post through the center holes of the cinder blocks. Then I covered the new concrete with plastic and let it cure until the following weekend. Something doesn’t look very plumb (vertical) here. It’s not the post; it’s the shed. I built a little extra tip into the sheds to help the rain run off. I didn’t think the roof had enough pitch. If you know anything about our climate in Las Vegas, you might know that although we don’t get a large annual rainfall, when it does rain, it can really put down a gully washer!

The finished gate, hung on the post. The gate latches into a board mounted to the side of the house. I considered narrower gaps between the boards like the gate on the other side, but that would have required more wood, and I wanted to keep the gate as light as possible. There’s nothing square about this project. The ground slopes downward from the house to the shed (for drainage), so the left side of the gate is a few inches longer than the right side. The slope also dictated hinge placement. I really wanted it hinged on the house side, but would have had to put up with a huge gap under the gate on the left side in order to have it short enough to clear the higher ground next to the house when opened.

A New Air Conditioner Clutch for My Wrangler

February 22nd, 2009

My Jeep Wrangler’s air conditioner pulley has been making some pretty scary noises this past week on my way to and from work. This weekend I was able to tear it down to confirm that my air conditioner clutch was toast. There was no friction material left — just metal-to-metal. Even though I wasn’t using the AC, the bearing had developed enough play to allow the clutch surfaces to contact each other and scrape away all the friction lining. Below are my steps.

Here’s the culprit: a noisy air conditioner pulley/clutch assembly.

Start by loosening the center bolt on the idler pulley. It’s 15 mm.

Back off the idler pully adjustment bolt, also 15 mm. This will allow you to get enough slack in the belt to slip it off the pulleys. A short ratchet like the one shown is handy in these tight quarters.

Once the belt is off, remove the bolt in the center of the clutch plate. (It’s 10 mm.) This keeps the clutch plate on the splined shaft of the compressor. After removing the bolt, work the clutch plate off the shaft. The factory service manual warns you against prying on the clutch plate because you might warp it. The manual suggests tapping it with a plastic mallet to loosen it from the shaft. That didn’t work for me, and I ended up doing a little careful prying along with a whole lot of tapping and wiggling to get the plate off.

Here’s the back side of the clutch plate after I got it off. Notice the two small washers sitting on it. These are shims that fit into the center to establish the proper clearance between the clutch plate and the clutch pulley. Also notice there is no friction material left, and the metal is scored and shined from metal-to-metal contact with the pulley.

Next, remove the clutch pulley itself. To do that, the snap ring you see around the center hub must be removed. The snap ring holds the bearing onto the hub. The bearing fits inside the center of the pulley. As with the clutch plate, I had a lot of trouble getting the pulley off. (The factory manual says it will slide off.) I had to do some careful prying and a lot of wiggling with this piece, as well.

Snap ring plyers, such as these, are needed to get the snap ring off.

Here’s the air conditioner compressor after both the clutch plate and pulley have been removed.

This is a view of the back side of the pulley, where the bearing fits in. If you look closely, you can see a series of stake marks around the bearing’s outer circumference, where the metal of the pulley hub has been dimpled in order to hold the bearing securely in the pulley. This seems to be a weak arrangement, at least in the case of my 2001 Wrangler. The bearing worked against the stakes and pushed them back out enough to create some extra clearance, which allowed a slight wobbling of the pulley. Eventually enough wobble was created to begin scraping the pulley and clutch plate together, ruining the friction lining.

It’s time for a new clutch assembly. Even though it’s a Sunday, I optimistically set out to find one. After all, Las Vegas is a 24/7 town, and being in the desert, I figured I wouldn’t have a problem finding a parts store that handled a nice variety of AC parts. Hmm … wrong! I visited four different parts stores. The closest I came was the entire compressor and clutch unit, which ranged from around $300 to $400 in the various stores.

Since I need to drive my Jeep to work on Monday, I decided I’d have to put it back together, at least partly, and work on finding a clutch assembly in the meantime. I’m probably going to have to buy it on the Internet — or at the dealer.

I restaked the bearing in the pulley, using a screwdriver and hammer. It’s not too pretty, but the bearing is now nice and tight again. Too bad the mating surfact for the clutch plate is so trashed. I also put a thin film of anti-seize compound on the bearing hub so it will slide off easier when I find a new replacement.

Make sure you protect your eyes when doing something like re-staking a bearing. Little pieces of the pulley’s hub can splinter and fly into your face.

The pulley and snap ring are back into place, the belt is reinstalled, and its initial tension has been adjusted. I decided not to reinstall the clutch plate.

A block of wood is useful to tap the pulley all the way back onto the shaft. (I suppose this means it will be hard to remove again.)

After running the engine a few moments, I stopped the engine and retensioned the belt. The belt isn’t new so it’s done stretching, but there always seems to be some play acquired as the belt seats itself comfortably back into pulley grooves by running a few revolutions. After the final belt adjustment, don’t forget to tighten the center bolt on the idler pulley a bit more than you might when you first start the motor to reseat the belt. Although I snugged it up with my short ratchet to test my installation, I wouln’t have trusted it to stay tight during extended running.

The next step: Find a replacement clutch assembly and do most of these steps all over again!

Quickly Making a Bunch of Folders

January 2nd, 2009
Folder Maker

Folder Builder

Have you ever needed to create a lot of folders, but didn’t want to spend all that time creating and naming them? I’ve had the occasional need. The most recent was when I was working with a group of students and wanted them to each save what they were working on in their own folders. It turned out that their teacher hadn’t established individual folders for each student within the classroom folder. This added a considerable amount of time to what I was trying to do with the class.

It occurred to me that if I had a list of the folders I’d like to create, I could feed the list to a program and have it automatically create the folders. A list of student names is easy to obtain, and once fed to a program, it would take less than a second to create a folder for every name on the list.

I wrote a program I call Folder Builder, which does just what I’ve described. Drag and drop a file onto it that contains a list of folders to be created, select a destination for the folders, and viola! The list can be anything you want, not necessarily a bunch of student names. The program can create and name about 900 folders in around 5 seconds! If you’d like to try out Folder Builder, you can download it at http://papertrailsoftware.com/foldermaker/index.htm. It’s free.

NCLB Isn’t Working

December 30th, 2008

No Child Left Behind isn’t working. Of course, if you’re a teacher, you already knew that. This month’s issue of neatoday (January/February 2009) has a great article that discusses how improved high-stakes test scores should not be taken as an indication that NCLB is successful. See the article on pp 30-31: “Is NCLB Working? The ’scientifically-based’ answer”.

It’s all about something called Campbell’s Law, which basically says that students’ scores will rise when you devote your resources to doing well on a particular test, even though students may not actually know more. If you’re a teacher, you already knew that, too! After months of preparing students to do well on a high-stakes test, just try asking them to solve problems in a way that isn’t on the test and see what you get.

My favorite quote from the article: “… to see whether NCLB is really boosting achievement, we can’t rely on high-stakes state tests. We need to look at scores on a test for which students don’t get prepped.” Or maybe it was this one, a quote of Susan Neuman, former Bush education official: “Villifying teachers and saying we are going to shame them was not the right approach …”

See the online edition at http://www.nea.org/home/20755.htm.

Monitoring Drive Free Space

December 29th, 2008

A couple weeks before Christmas I received an e-mail from our networking department advising me that the data volume on our server was getting awfully full. Admittedly I’d been a little lax lately in keeping close tabs on it. (Hey, I’ve been busy with other distractions!) It turns out that a couple of users were syncing their iPods to the server, and there was an incredibly large amount of music filling up the data volume. (This might be a good time to consider reinstituting space limitations. )

Disc Size

Disc Size

I got it all cleaned up and began thinking about a better way to keep track of the amount of space being used without having to remember to go check it periodically. I decided to write a little program that would automatically give me a report whenever I logged in. The result is Disc Size. Whenever it runs, it has a look at each drive on the system and reports (among other things) the amount of space used and available. To run it automatically, I just placed a shortcut in my startup folder. If you’d like to give the program a try, you can download it at http://papertrailsoftware.com/discsize/.

More Fun With Water Pipes

December 14th, 2008
Trenching For a New Water Line

Trenching For a New Water Line

Back in September after fixing a pipe that a tree root broke, I wrote in a post, “I have to wonder how many more spots there are along the system of pipes under my back lawn that are slowly being pulled apart …” (by roots). Well, the next installment arrived, only this time it was much more serious than a broken sprinkler pipe. It was the supply line to my house from the water meter. Amazingly, our water pressure seemed OK, and there was no evidence of a wet or spongy lawn, but our bill for last month was $800! Usage was 168,000 gallons for the month! That’s like filling up three 25 x 50 foot swimming pools, 6 feet deep!

I knew this day would arrive eventually, but I wasn’t prepared for it. We’re the seventh or eighth house on our cul-de-sac to replace our main water line. I’ve been told that the plastic line they used 20 years ago wasn’t very good. The truth in that statement is evident, as one-by-one, main lines are failing in the neighborhood.

The best fix is to run a completely new line. There’s no sense trying to find where it’s leaking and just fix the leak. Soon it will leak again in another spot. My neighbor found that out. I was lucky to get ahold of Mario, a contractor I’ve used in the past. He’s very talented and very reasonable. He’s done several of these jobs and is careful not to tear up the yard more than absolutely necessary. He even tunnels under sidewalks instead of breaking them. (I’ve read a few horror stories online about contractors who come in and rip and tear, fix the leak, and then leave the mess for the owner to clean up.) In addition to replacing the line, Mario replaced the shut-off valve, the sprinkler valves, and the anti-siphon valve. Might as well, since most of the plumbing was all torn up anyway. Mario did a nice job of putting the yard back together, as shown below.

If you’re in the Las Vegas area and need someone to do this kind of work, contact me. I’ll get you in touch with him.

Together Again

Together Again

The Bushes That Broke the Original

The Bushes That Broke the Original

The Need for On Site Technical Assistance

December 6th, 2008

Recently a new version of Shockwave was automatically updated on a large number of computers in my district. Probably it happened all over the country. I don’t know, I’ve been too busy to notice. One of the results of this update was to break the eTools (virtual manipulatives) piece of Pearson Success Net. The problem was referred to our district’s user support division. We were hoping for an automated fix. After spending a considerable amount of time trying to find a way to automatically push a fix onto all affected machines over the network, the technicians concluded that they just couldn’t find a way.

To understand the scope of the problem, you must realize that Success Net is part of a district-wide adopted elementary math program, and there are 208 elementary schools in our district, each with between 100 and 200 machines. The majority of these are used by students and teachers, hopefully for curriculum-related endeavors such as reinforcing math concepts using the aforementioned software. The technicians concluded that someone at each school would have to go to each affected machine, temporarily disable the anti-virus program, and reinstall the older version of Shockwave.

For the past 12 years, the someone who will be doing that at my two schools has been me–an ECS. That’s fine. I’m an Educational Computing Strategist, and that falls within my abilities and my job description. ECS is the label our district has given me and about 220 others who do my job. We have two jobs, really: to provide instructional technology to teachers and students, and to serve as level 1 technical support at our schools.

So, okay, I’ll get that done. I think the folks at user support do a pretty good job, and if they say they can’t find a way, then they can’t find a way, and I’ll just spend the time and do it. It’s only about 265 machines between my two schools that I’ll have to go around and perform those steps on. No, not quite that many. A few, maybe 30, are used by administrators and office staff, and I’m not going to worry about them. At least not for the current problem.

It should only take, um let me see, a huge chunk of my time! Time I won’t be spending on my other responsibilities, but, still, okay. I’m the one with the necessary rights to do the job, and I understand what I need to do without anyone having to talk me through it, provide me a handout, or send me to a training. Imagine if we asked the teachers to fix this problem on their own classroom machines and the ones in the common learning areas, as well! Imagine if the Shockwave update has also broken some other program that might be used in our 102 middle and high schools, or our 27 other facilities that provide special services to students who aren’t placed in “regular” settings.

But what about next year? When problems like this come up, who will be there for the teachers and students next year? You see, like many other parts of the country, we’re undergoing a budget crisis. The ECS position is being seriously looked at as one of many positions to cut in order to save money. The district believes it will save $18 million by sending ECSs back to the classroom. I have to wonder if, in the long run, it will cost them more than that by eliminating us.

If we’re all back in classrooms and User Support says,

“You’ll have to have your ECS …. no, wait! …. I forgot …. you don’t have an ECS anymore, do you? … um … sorry, we can’t help you. We don’t have any people left, either. Budget cuts. Well, actually we have a couple, but you’ll have to wait a few weeks until they can make it to your side of town. Try to find a computer in your building that’s still working and just use that one.”

Substitute any software title in the above for one of your choice. They all seem to break sooner or later and require timely human intervention: Fast ForWord, Lexia, AIMS Web, Accelerated Reader, Accelerated Math, Star Math, Dibels, Destination Math, Fastt Math, Study Island, eWalk, and several other titles in use that I can’t think of at the moment. Even the operating itself, whether Windows or Mac, is subject to damage when an update goes wrong. (Sometimes that requires that a machine be reimaged, a process where the machine’s hard drive is wiped out and then receives a fresh, uncorrupted load of the operating system and other software. That’s part of my job, too.)

My district has a huge investment in these programs and the machines that run them, and many have become important components of plans to meet AYP (Adequate Yearly Progress). I hope the administration dwelling in the stratosphere know what we’ll be in for when stuff starts falling apart. Further, I hope our building administrators understand that a former ECS who has again become a classroom teacher has a full-time job planning, reflecting on his/her teaching, doing reports, grading, conferencing, meeting individual instructional needs, maintaining discipline, pulling duty, going to meetings, doing the bulletin boards, and probably a hundred other things I don’t remember that happen in an elementary classroom on a recurring basis.

I know my building administrators may not have a lot of power to affect the upcoming decisions about who is in which job next year, and I’m sure they’ve begun to ponder what they’ll have to do to try and keep as many of their instructional programs intact as possible. I know they have many other possible scenarios that should be bothering them by now, for example, “How will I get all the stuff done if my Literacy Specialist is cut”, or “Who will service my ELL (English Language Learner) students if I lose my ELL specialist?” But the e-tools problem is just such a nice example of how quickly an innocent automatic upgrade can quickly affect every machine in the district that uses a particular program, rendering it useless for a given task or program, or even useless, period!

A few weeks ago it was Fast ForWord on the Macs, requiring every Mac to be reconfigured by human hands in order to use the program again.  Again, victims of an automatic update. Now, it’s e-Tools. What an impossible job it would be for user support to send technicians out to all these schools and touch all the machines that use this program. It will also be impossible for a bunch of former ECS’s, now classroom teachers, to deal with problems of this magnitude and do justice to their students.

Let’s hope our leaders decide not to save $18 million, only to have to spend much more to recover from a foolish decision!

My Homemade Turkey Soup

November 30th, 2008

For the past five years, I’ve used what was left of the turkey to make homemade turkey soup. My recipe is a combination of several I’ve read in the past. Nobody agrees on exactly what goes into something like turkey soup, and that’s OK. For what it’s worth, here’s my take on it. I think this year’s batch was my best. I must have gotten the ingredients about right.

Ingredients

1st Phase

turkey carcass & scraps, salt, water, tall boiler

2nd Phase

bay leaves, basil, thyme, chili pepper, fresh ground pepper, parsley, marjoram, crushed garlic cloves, brown rice, carrots, celery, sun dried tomatoes

3rd Phase

Onion, noodles, grated zucchini, potatoes, turkey, recovered from 1st phase, green chilies, mushrooms, corn, diced red/yellow/orange sweet pepper(s)

Cooking

1st Phase

  1. Throw turkey carcass & scraps and salt in the boiler and fill with water until the carcass is at least covered. Fill with as much water as you think you can get away with, but remember that you’ll need room in the boiler later on for the rest of the ingredients. (When you remove the carcass later, there’ll be some extra room again, but keep in mind that the rice and noodles will swell. Don’t get too carried away with the salt!
  2. Boil the carcass until the meat falls away from the bones. While it’s boiling, make room in the refrigerator for the boiler.
  3. Drain the broth through a colander. Sift through what remains in the colander, throwing away the skin, gristle, and bones. Place the meat that remains in the colander into the refrigerator for later.
  4. Refrigerate the broth in the boiler until the grease has solidified at the top (probably overnight.) When the grease is solid, skim it off. The remaining broth will be quite gelatinous until it’s re-warmed.

2nd Phase

  1. Add ingredients for 2nd phase to the broth. These ingredients are separated into 2nd and 3rd phases based on how much longer it takes to cook them until soft. Quantities are by guess and by gosh, which is what makes it interesting. Adjust ingredients to suit. Omit or add anything you’d like. Move ingredients back and forth in the columns if you discover something needs more/less cooking than something else.
  2. Bring to a boil, then reduce heat until it is just barely simmering.
  3. Stir occasionally.
  4. When the rice begins to soften, begin the 3rd phase.

3rd Phase

  1. Add ingredients for 3rd phase. Again, quantities are personal preference.
  2. Bring to a boil again, then reduce heat until it is just barely simmering.
  3. Stir occasionally.
  4. When the potatoes and noodles are soft, remove the soup from the heat.
  5. Add cool water to make up for any additional volume of broth you want to have. This also helps cool it faster.
  6. Package and freeze in serving-sized portions when the soup has cooled enough to easily handle.

Enjoy.

Erratic Optical Mouse

November 28th, 2008
This is one of those simple little things that can trip you (me) up.
This morning it was like I was drunk, every time I’d try to use my mouse. It was working fine, then suddenly it wasn’t–jumping all over the place when I’d try to guide it to anything I wanted to click on. I turned it over and everything looked OK until I took off my glasses (a tactic employed by people past 40) and held it closer. There was just the tiniest thread of fuzz riding along, clinging to the lens. One end was brushing my desktop as I moved the mouse, and the other end was apparently wiggling all over the place, giving my mouse’s tiny little brain fits as it tried to coordinate my movements with the movements of the fuzz. All is well now. The fuzz has been added to the collection on the floor, and my mouse is clean and happy.

New Life for an Old Cordless Drill

September 7th, 2008
Old cordless drill turned into a new 12-volt drill.

Old cordless drill turned into a new 12-volt drill.

Cheap cordless drills seem to last longer than the batteries that come with them. The problem is, a replacement battery is usually more than half the price of a new (cheap) drill. As far as I’m concerned, I might as well buy a new drill, which usually comes with two new batteries. The batteries usually last for 12 to 18 months. This presents a problem, though. I now have a small collection of cordless drills and no way to power and use them.

One solution is to find an alternate power supply, like I’ve shown in the picture. Shown is an old 12-volt Sears drill, perfect for running from a 12-volt autotive battery. I gutted the old battery and soldered a two-conductor cable to the battery shell’s connectors. On the other end of the cable, I attached battery clips. I now have a drill I can carry in my vehicle and power directly from the vehicle battery.

My next challenge is to figure out how to re-power my 18-volt drill.

Maybe it’s time to quit buying the cheapies and invest in a professional-grade tool.