Lee.org

(This was supposed to be posted in the summer of 2013 but it got stuck in my Drafts folder. Actually, I want to write many many more good things about Minnesota and tighten up the writing here but I figure it’s time to just let this post fly)

How I Spent My Summer or Life on a Northern Minnesota Island  

Megan and I spent the last 2 weeks on a privately owned island with friends that may have well been family.

Located roughly between the triangle between Thunder Bay, Winnipeg, and Duluth in more ways than one, we had a tremendous vacation.

The island was formed by glaciers some twenty thousand years ago, stretching long and lean eleven hundred feet north-south and mostly 100 feet wide, but bulging out to almost 500 feet east-west at the northern proboscis.

Megan and I got in a lot of living on our trip!

• The surprisingly glorious Mall of America
• Sailing near Canadian waters with Don & Craig
• Swimming in Rainy Lake
• Kettle Falls boat trip & lunch (fried walleye and a Reuben!) & touring with Robin, Becky and Lucas
• Working on the Review Islands with Robin & Bob, getting a tour of historic Mallard Island and Ernest Oberholtzer’s legacy
• Playing dominoes & Set & Settlers of Catan
• Shooting Star gazing on the dock with family
• Being the last car in the Ranier Days parade!!
• Getting a tour of the house & garden of Sarah & Don’s place in International Falls
• Seeing Don Johnson’s Memoir Books of life on Rainy Lake at Coffee Landing… and then seeing the originals in the house on the island
• Megan saw Planes with Sarah, Don & Billy
• Great food: spaghetti with homemade sauce, tamari chicken, cold quinoa salad, pancakes, frittata….
• Sunsets seen from the Happy Shack
• Getting a tour of the (1,000′ x 200′) island
• Looking for blueberries on the island and only finding sour mini cherries
• Billy saying “there’s water on the floor in the bathroom” (uh oh!), “I’m not talking at you!”, “That’s my moon… you can look at it…”
• Living in the “1st cabin”
• A giant spider with egg sack living in our outhouse
• Dockboy Lee! – cuz he’s often the first one to the dock when a boat arrives, to help bring stuff up the hill
• Stomping trees with Chris
• Getting 10-12 hours sleep per night!
• Chickens doing their job with their vuvuzelas for our breakfast

Short form: 2/3 of wisdom teeth removals are unnecessary and dentists don’t really want you to know.

In about 1999 I had a wisdom tooth removed because the gum had gotten infected, inflamed, and painful. The dentist suggested I get all of my wisdom teeth out “because it would be better in the long run.” I declined, just getting the one tooth removed.

In about 2003 I had a new dentist after moving. I remember the intake form had this on it:

Do you still have your wisdom teeth?
Yes | No
If so, why?

The answer I wrote was “because I use my teeth to chew my food“. Of course, the intake form question lead to a discussion with the dentist. I had this crazy belief that nature wouldn’t create a system where every human was better off if they had four serious dental surgeries as a matter of course.

I was incensed. This question, delivered by a board certified professional dentist practically stated that it was wrong of me to have wisdom teeth. The follow-up is of course, “…and you know, we can fix that problem for you.” It’s like bringing your car in for an oil change and having the mechanic tell you that your confabulator needs realigning, and if you don’t get it done soon, well, who knows what will happen! I’m allergic to professionals using Fear, uncertainty, and doubt on me. I didn’t go back. I thought about blogging about it back then but who has time for that junk?

Well, I just came across this article more-or-less confirming my suspicions. It says about 2/3 of wisdom teeth shouldn’t be removed.  But don’t believe the article, believe the links the author shows us…

• The Prophylactic Extraction of Third Molars: A Public Health Hazard, in the American Journal of Public Health. 2007 September; 97(9): 1554—1559.  doi: 10.2105/AJPH.2006.100271
• The British National Health Service saying, “Your wisdom teeth don’t usually need to be removed if they’re impacted but aren’t causing any problems. This is because there’s no proven benefit of doing this and it carries the risk of complications.”

And here is a VERY curious article I found in the Cochrane database (Cochrane is awesome, it’s like the Consumer Reports of research, they look for and help create systematic review research because it is so much better than individual studies).

• Surgical removal versus retention for the management of asymptomatic impacted wisdom teeth. – In brief, they couldn’t find any good research on whether it was better to leave wisdom teeth in or take them out preemptively. Something is very fishy there!

PS, Great thanks to the folks at The Daily Digg for putting the original article in my inbox, with the title of Wisdom Tooth Removal Is A Racket. The Daily Digg is one of my major sources of curated news right now. They practically hide the link to join their mailing list so… sign up here.

Last Academic Semester. I’m writing this from the BART train. Today begins my last academic semester at San Jose State University, studying for my Master’s of Occupational Therapy degree. This summer and fall I’ll be doing fieldwork. Then in January I’ll take the NBCOT. Passing that, I’ll be an Occupational Therapist!

Last semester was rough. The stress of the program, lack of sleep, very long hours, and isolation took it’s toll on me and my family. I feel like I’m ducking into a long, dark tunnel for another four months. Please wish us well.

I ordered eight sensible gifts from Cards Against Humanity for Abigail for Hannukkah. The gifts were AMAZING! Really. They were inspiring, thoughtful, absurd, touching… just amazing!

Oh, and in case you’re wondering, Abigail isn’t Jewish, she’s a toddler! She welcomes presents from all religious and secular sources.

The first 3 nights were, of course, socks! You can’t have Hannukkah without lots of socks. Each pair came with nice, hand-written letters from dads. I don’t know whose dads but they were obviously lovingly written. Sensible as they a gift, they were unfortunately too large for Abigail’s tiny feet.

The fourth night held a Cards Against Humanity US Treasury Inflation Protected Securities Fund and a letter about the value of being thrifty! They friggin’ sent Abigail a dollar in an interest bearing account to keep safe! It’s like they were helping her open her first bank account! Yes, it’s a real dollar in a real account. The redemption information is on the back.

And here’s a photo of the tuppence bank scene in Mary Poppins for reference :-)

Here’s a snapshot of her investment portfolio. As you can see, since investing in November, her $1 has already turned into at least $1.00024645!

Then things started getting cray-cray. For the fifth night of hannukkah, they made Abigail a supporting member of NPR through WBEZ Chicago! So many firsts! So she’s like really a member of NPR now!

Next up, they gave the Chinese workers that actually print Cards Against Humanity a week of paid vacation. This might sound a bit odd but those folks live in the kind of place where they literally didn’t have a procedure for filing for vacation. The note explained how the CAH folks had to “buy” a week of nothing and then tell the workers to go home. It was accompanied by photos and thank-you cards from the people that work there. That is such a beautiful thing. There was also an awesome letter from “Josh’s dad” about the nature of gratitude. You can read more about it here.

Day Seven: This is when shit went off the rails. Stolen from their website:

We used the money for the seventh night of Hanukkah to purchase Tête de Faune, an original 1962 Picasso. The 150,000 people who subscribed to our Eight Sensible Gifts for Hanukkah now have a chance to vote: should we donate this work to the permanent collection of the Art Institute of Chicago, or should we laser-cut it into 150,000 tiny squares and send everyone their own scrap of a real Picasso?

Again, a link. As of this writing, they haven’t gotten back to us about the fate of the Picaso. It included a hand written letter from “David M.’s Dad” about the nature of culture.

Last and greatest, they made Abigail king for a day! Well, strictly speaking, she will be king for exactly 3 minutes. They bought a castle in Ireland and are letting each of the 150,000 people that bought in have their turn at ruling it! Yes, it’s a real castle. Though it’s rather modest. No hot water, no heat… not even a roof. But it is a certifiable, verifiable castle! You can read some of the proclamations of prior kings here!
Abigail’s turn at rulership be August 4th, 2016 10:06am-10:08 Central time. Look for some big changes!

Here’s a local copy of the manual for the Britax Advocate car seat. One of ours was manufactured 8-2015, the other 10-2015. We own one for each of our cars. There are good instructions and videos on how to install it on the Britax website.

Nerd alert: Here’s my latest attempt at hypermiling in our 2012 Prius C. I was stuck in 30-50 mph traffic on 880 North for a while on a trip in December. I went 11.8 miles averaging 80.4 mpg.

A friend asked me some advice on what books to get for school. Here is my school book advice:

I have thought a lot about books and tried various things. Here’s what I do these days.

I buy all the required reading at the very beginning of the semester from Amazon. I figure that I can sell it back on Amazon if I want to keep it and only lose a little bit. That strategy has worked out well… low stress and generally inexpensive. Only a few times have I been stuck with a book that has a new edition, thus devaluing my book greatly. I figure that if I am trying to save $100 by not getting a book, and that is getting in the way of a $70,000/year job, my priorities are in the wrong place!

To sell on Amazon: I generally match the lowest price and it usually sells within 2 weeks. I ship USPS “Media Mail” which is usually about $3-4 instead of $8-15 for Priority Mail. Pay for shipping online, wrap the package, then walk into the post office, CUT IN LINE, set the package on the counter and say “my package is all set. Thanks.”

After I’ve bought the book, I find a PDF version as a personal backup. I leave this on my computer, this has been very useful for me as I study during my long commute. There is some question as to the legality of having the paper book and a PDF backup but this definitely isn’t a settled matter.

Looking to use your VHS player. I’ve got some tapes but don’t know what’s on them. Could I come over and take a peek? Message me.

In August, 2015, I wrote this policy for keeping children safe from lead poisoning in the  electronics lab at The Crucible in Oakland, CA. It is a description of the problem, a well researched discussion, and a solution.

Here is the guide nicely formatted: Protecting Children from Leaded Solder at the Crucible
————–

Protecting Children from Leaded Solder at The Crucible

Policy Statement:

Due to the potential of lead intoxication, it is the policy of The Crucible to not allow persons under age 18 to use solder that contains lead for electrical connections. Lead-free solder performs acceptably with far less possibility of toxicity.

Background:

This document is directed at multiple audiences:

– to the organization so they understand the additional expenses of maintaining a lead-free environment.

– to faculty so they understand the reasons for the shift away from an easier-to-work-with material.

– to parents so they understand how we are acting to protect children.

Solder is used with soldering irons in the Kinetics and Electronics department to make electrical connections. Solder composed of tin and lead is long established as a well performing product, but the dangers of working with lead are also well known. Even small amounts of ingested lead can cause irreversible neurological damage, especially in children. Large international efforts have been implemented to reduce human exposure to lead. Notably, leaded paint and gasoline were banned in the U.S. in the 1970’s, the European Union banned lead in all electronics in the 2000’s, and California’s Electronic Waste Recycling Act of 2003 bans lead in some electronics.

Leaded solder remains legal and commonly used for electronics in the United States. It is generally understood that when leaded solder is used with proper precautions, it does not constitute a danger to the user. However, younger students may have trouble following these precautions and may put themselves at risk.

Important dangers for children using lead solder are:

– The difficulty of enforcing strict hand washing policies in a classroom environment with children

– The relatively high incidence of pica (habitual eating of non-foods) among children and the difficulty of recognizing this practice in the classroom

– The possibility of careless handling of solder by children

– The extremely long-term toxic effects of lead poisoning

– The low dose needed to reach toxic levels

Alternatives:

Lead-free solder is slightly harder to work with but the safety concerns far outweigh the time spent learning how to use the new material. Solder that is made with 96.5% tin, 3% silver, 0.5% copper is a popular substitute for leaded solder. Here is one vendor’s product: http://www.all-spec.com/products/KWLF27500.html and another http://www.techni-tool.com/488SO7871.  Solder made from 99.4% tin, 0.6% copper works almost as well as the tin-silver-copper solder and is less expensive. Other types of lead-free solder are also available.

Costs of switching:  

Tin/lead solder costs about $25/lb, tin-silver-copper solder costs about $50/lb, tin-copper solder costs about $35/lb. Both lead-free solders wear out the tip of a soldering iron in 1/3 the time as with tin-lead solder. A new tip costs about $2-10.

A summer of classes typically goes through 1.5 lb of solder and 5 soldering tips. So switching to lead-free solder might cost an extra $50 in solder and $50 in tips.

Research on Leaded Solder:

“Lead poisoning has been reported in children after a single ingestion… Pica is a very well identified risk factor of lead intoxication in children.”

– Sabouraud, S et al. Lead poisoning following ingestion of pieces of lead roofing plates: pica-like behavior in an adult., 46 Clinical toxicology (Philadelphia, Pa.) 267—269 (2008). http://doi.org/10.1080/15563650701639014

In the Sabouraud et al. article above, a case study described a woman with a single 6mm bullet lodged in her body. Her blood lead level climbed to dangerous levels over a few months. This implies that if piece of lead-solder was lodged in a student’s stomach, the negative consequences could be dramatic.

(paraphrased) A 45 year-old woman had lead shot pellet lodged in her stomach, probably from eating a hunted animal. Her blood lead level climbed to 550 μg/L before she excreted the pellet. There are several similar medical case studies described in this article.

– “Intoxication from an Accidentally Ingested Lead Shot Retained in the Gastrointestinal Tract” Environ Health Perspect. 2005 Apr; 113(4): 491—493. Per Gustavsson and Lars Gerhardsson. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1278491/#!po=25.4717

“one study showed that about 10% of children older than 12 years engage in pica”

– http://www.academia.edu/202338/Pica_An_Update

“Pica is observed most commonly in areas of low socioeconomic status and is more common in women (especially pregnant women) and in children. To our knowledge, the prevalence of pica is not known. Numerous complications of the disorder have been described, including iron-deficiency anemia, lead poisoning, and helminthic infestations.”

– “Pica: Common but Commonly Missed” http://www.medscape.com/viewarticle/405804_1

The CDC recognizes that “[n]o safe blood lead level in children has been identified” and that a blood lead level above 5 micrograms per deciliter ( µg/dL) should be treated.

– http://www.cdc.gov/nceh/lead/

“…the average blood lead levels from 4 to 10 years had the strongest association with the adult full-scale IQ. For each 1 µg/dL average blood lead levels, the adult full-scale IQ deficit was about two IQ points.”

– http://www.environmentalhealthnews.org/ehs/newscience/iq-effects-childhood-lead-exposure-persist-in-adults/

“Lead in the body comprises 2% in the blood (t1/2 35 days) and 95% in bone and dentine (t1/2 20—30 years). Blood lead may remain elevated for years after cessation from long exposure, due to redistribution from bone.”

– Gordon, J. N., Taylor, a., & Bennett, P. N. (2002). Lead poisoning: Case studies. British Journal of Clinical Pharmacology, 53(5), 451—458. http://doi.org/10.1046/j.1365-2125.2002.01580.x

“Early symptoms of lead neurotoxicity in both adults and children include irritability, headache, decreased attention span, memory loss, and low-level cognitive impairment… As childhood exposure increases, behavioral symptoms of impulsiveness, inability to follow sequences or directions, decreased play activity, lowered IQ. and poor attentiveness are seen at PbBs of 10-35 µg/dL. …  Recent studies evaluating the relationship between blood lead levels and neurobehavioral performance have shown evidence of effect at levels below 10 µg/dL -the current level considered excessive for pediatric exposure… [In one study] a significant inverse relationship was observed between blood lead levels and reading and math test scores and comprehension testing. The correlation was noted at levels as low as 2.5 µg/dL.”

– Patrick, L. (2006). Lead Toxicity, A Review of the Literature. Part I: Exposure, Evaluation, and Treatment. Alternative Medicine Review, 11(1), 2-22. http://europepmc.org/abstract/med/16597190

A cursory review demonstrates that ingestion (accidental or otherwise) of even a single grain-of-rice sized piece of lead solder could be dangerous for a child. A grain of rice weighs about 0.01 grams. A 0.01 gram piece of 60/40 Tin/Lead solder has about 0.004 grams of lead. That could raise the blood lead level of a 50 kg child by 8 µg/dL, higher than the current proposed actionable level of 5 µg/dL. Accidental ingestion of piece of solder the size of a grain of rice is extremely plausible when a child eats their lunch in the same clothes they solder in.

Concerning the Dangers of Solder Flux:

Another potential danger to soldering are the fumes from the flux. People exposed to flux fumes for multiple years in the workplace have developed asthma-like symptoms. The danger to students appears to be very small owing to the short duration of exposure. Additionally, research on this topic continues to be inconclusive, even for people that have worked for many years with solder. No particular flux has been singled out as more toxic than another. As more research is found on this subject, the policy will be reviewed.

Research on Solder Flux:

“Research on the respiratory effect of exposure to solder fumes in electronics workers has been conducted since the 1970s, but has yielded inconsistent results. The aim of this meta-analysis was to clarify the potential association… Soldering may be a risk factor for wheeze, but may not be associated with a clinically significant impairment of lung function among electronics workers.”

– Mendy, A, et al (2011). Work-related respiratory symptoms and lung function among solderers in the electronics industry: a meta-analysis, http://doi.org/10.1007/s12199-011-0236-8

“A cross-sectional study was conducted in four medium-sized electronics firms in which control measures to capture solder flux fume were absent or visibly ineffective… The odds ratios for ‘all wheeze’, shortness of breath, and work-related eye, nose and chest symptoms were all significantly greater (raised about 4-5 fold) in women who soldered > or = 37 h/wk when compared with those soldering < or = 20 h/wk.”

– Palmer, K. (1997). Respiratory disease in workers exposed to colophony solder flux fumes: continuing health concerns. http://www.ncbi.nlm.nih.gov/pubmed/9604483

Tips on Using Lead-free Solder in Place of Leaded Solder

Be sure to leave a small blob of solder on the tip when putting it down. Leaded solder only needs the tiniest bit on the tip to keep going, lead-free needs a larger blob, lest it oxidize fully.

Lead-free solder needs a higher temperature than leaded, typically 700-750F instead of 600-650F. A temperature-controlled iron works better than a cheaper current-controlled iron put to a higher setting. The higher setting will contribute to the tip wearing out faster, especially so with a current-controlled iron. Common tip failures include the tip becoming uncleanable after fully oxidizing, and the tip gradually being melted away.

Leaded flux-core solder adheres to dirty metal better than lead-free solder. Cleaning your piece with 98% isopropyl alcohol or other chemical wipes can help with adhesion.

Using finer gauge wire for lead-free may help. 0.031″ is popular for thru-hole and 0.023″ for surface mount.

Using deionized water in the cleaning sponge may help.

Lead-free solder wears out tips about 3 times faster than leaded solder. Be sure to have spare tips on hand.

Here is a guide to lead-free soldering from a major solder manufacturer: http://www.kester.com/kester-content/uploads/2013/06/Lead-free-Handsoldering.Final_.4.19.06.pdf

See a wonderful new drone firework artform!

With all this talk about drones being scary, here is a glimpse at the future of art!

Skip to 43 seconds
http://www.huffingtonpost.com/entry/drones-beethoven-intel-world-record_5693ae9de4b0a2b6fb70b843

.
.