Tag: Teaching

I was running out of time last week as the publication hour was neigh, so I was not able too include everything that I wanted to include.  In the meantime, I have gained some additional information that refutes one of the points that I made.  Remember, The Geek likes to be corrected when he is wrong.  We shall get to that after the fold.

This installment has to do with some experimental or otherwise not widely used loudspeaker designs, but also something much more personal to me.  It has to do with a good friend from almost 40 years, and his interaction with Paul Klipsch and others involved in the company.

First we shall make the correction, then talk about other loudspeaker designs, and then the more personal stuff.  Ready to go?

In electronics, a loudspeaker is what most people just call a speaker, the device that converts electrical signals to sound.  They can range from very simple to very complex designs, with variations in cost from just a few cents to thousands of dollars.

All practical loudspeakers are electromechanical devices, using an analogue electrical signal to make the loudspeaker components to move in such a manner as to in turn move air (usually, although other media can be used for purposes other than human perception) and thus make a sound.  For human hearing, air is almost always the medium used.

Loudspeakers are one of the few modern electronic devices that are analogue only.  In other words, a truly digital loudspeaker does not exist except in a few research laboratories and they are not very good.  It is interesting to me that the final stage of reproducing sound is firmly rooted in the 19th century insofar as basic technology in concerned.  This discussion is limited to electromechanical loudspeakers.  Purely mechanical ones are much older than electromechanical ones.

Donald Jay “Don” Rickles (I like it that he uses his own name, and I would here but would have to give up my low UID to do so) is unique.  I am actually not that fond of him, but he is an American icon.  Born 19260508, he is now 85 years old, and going strong!  That is quite an accomplishment just by itself!

His trademark is really being a jerk.  I am a jerk unintentionally from time to time, and when I am a jerk, the results are usually not very good.  He does it intentionally, and that seems to work for him.

I was going to write this piece about a completely different subject, but had what I call the Jay Leno TeeVee Show on for background noise, and Rickles was one of the guests.  I thought that he was dead, but I guess that I had him confused with Rodney Dangerfield.

Before we get started, let me be clear that any information contained here, although to be best of my knowledge accurate, in in no way intended to be a substitute for advice and care from licensed medical professionals.  OK, disclaimer stated.

Aspirin is one of the first synthetic drugs, and is still in wide use after over 100 years.  It was first marketed by Bayer in 1899, and sales are still strong despite competition from drugs like acetaminophen,  ibuprofen, and naproxin sodium.  Bayer has in the past week or two come out with a new advert about its new “quick acting” aspirin.

This material is “quick acting” because the particle size is much smaller than that of regular aspirin.  Since aspirin is only slowly soluble in water, the greater surface area for the same mass does speed up absorption.

I have written pieces about fireworks in this space for several years now.  This year is no different, but instead of describing how modern fireworks operate, we shall, courtesy of The Doctor, take the TARDIS back to 1784, the first Independence Day after ratification of the Treaty of Paris, so for the first time the United States was a truly independent Nation on 04 July.

Unfortunately, my video camera was not working at the time, so I shall have just to describe what fireworks looked like at the time.  The Doctor told me that he would come again and that we would go to the 1785 one for next year, and make sure that I had a functional video camera.

Except for color, fireworks in that era were similar to some of the least advanced ones that we have today.  The complex aerial effects are quite modern, bright color is modern, and set pieces are also modern.

Those of you who read this regular series know that I am from Hackett, Arkansas, just a mile or so from the Oklahoma border, and just about 10 miles south of the Arkansas River.  It was a redneck sort of place, and just zoom onto my previous posts to understand a bit about it.

I rarely write about living people except with their express permission, but may make an exception or two here because it might be important to talk about some of her decedents who still breathe.  None of those references will be derogatory.

I introduced you to Ma a few weeks ago here.  Now comes more about her.

Sulfur is one of the few chemical elements found in its pure state in nature.  Consequently, it was known and used by the ancients.  Many of those uses are still employed to this day, so it is a good thing that sulfur is rather common, at least locally.  Historically, sulfur was mined near volcanic activity and thermal springs where it often occurs.  In a few third world countries that is still a source of income for a significant number of people.

As the use of sulfur (mostly as sulfuric acid) increased in the 19th century, mining sulfur near volcanic regions could not keep up with demand, so new sources had to be developed.  It was known that vast amounts of sulfur occur in association with salt domes in and near the Gulf of Mexico, but there was no way to mine it due to water and shifting sand.  Thus, in 1894 a brilliant process was devised by German-American engineer Herman Frasch to solve the problem.

A comment thread on Friday evening’s Popular Culture installment got me to thinking about this, and I decided that it would be a good topic here, and some Geeky stuff that can be used by a wide range of the public.  Thus, I write this as a public service.

There are several situations that people can find themselves in due to circumstances beyond their control.  Many of them involve interruptions of utility service, but some other eventualities can also require fast attention to mitigate further damage or even personal injury.  We shall discuss a few of those this evening.

Probably the most common situation that occurs is electrical service interruption.  This can be more serious than one might think.

This may be a bit of an enigmatic title, so I shall explain posthaste.  I have quit listening to and watching the extreme right wing talkers.  I have monitored them for years, so you do not have to do so, but I finally just had enough, and could not take it any more.  There are a couple of reasons, but the largest one was that I was stupider after listening than before.

Ma always told me that after I read a book, listened to a radio program, or watched a TeeVee show to ask myself one question:  what have I learnt?  In the case of the radical, hate filled, ultra right wing talkers, NOTHING lately.  I learnt some time ago who they were and what they were preaching, and it is nothing but hatred and fear.  I guess that I was just listening more recently for how they would do it.

That is enough.  I am gone.  I quit listening to the drug addled and deafened Limbaugh some months ago because all he does is bellow.  More to follow.

Those of you who read this regular series know that I am from Hackett, Arkansas, just a mile or so from the Oklahoma border, and just about 10 miles south of the Arkansas River.  It was a redneck sort of place, and just zoom onto my previous posts to understand a bit about it.

I rarely write about living people except with their express permission, but may make an exception or two here because it might be important to talk about some of her decedents who still breathe.  None of those references will be derogatory.

I actually know less about Granddad than I do about Ma, because he died in 1969 at the age of 91.  I was only 12 years old then.  Ma lived until she saw me as an adult and married and their mother having her great, great grandchildren.  Here is what I know about his history.