Sunday, September 30, 2007

A poor design for blood donation

Apparantly, my arms aren't designed properly for donating blood. Ever since I can remember, people have always had trouble when trying to draw blood from my arms for doctor visits and such. There was one particular case where a nurse tried jabbing me with a needle three or four times before giving up and asking another nurse to give it a try. That paired with my propensity for fainting when having blood drawn has caused me to avoid donating blood.

I know donating blood is for a good cause and saves lives, so a couple months ago when a friend mentioned she was going to donate blood, I decided to try again. The last time I donated blood I was in high school over 20 years ago and I nearly fainted. Surprisingly, this time the whole process went quite well. While the nurse did mention my vein was a bit of a challenge, she had no problem getting the needle in on the first attempt, and I didn't even get light-headed.

So, two months later I became eligible to donate again and I was happy to give it another go today. Unfortunately, it didn't go so well. The nurse suggested that since I have a common blood type (A+) it would be worthwhile for me to do some sort of "double" donation of red blood cells. For this type of donation they hook you up to a machine and take twice the number of red cells than usual, but also attach a return tube to you to put back all your plasma and platelets and also add some saline. The nurse ran a quick test to see if I was eligible for this type of donation and it turned out I was - almost 50% of my blood was made up of red cells. So far so good. But, the problem started when the nurse went to attach me to the machine that would be filtering my blood. From what I've been told, the vein in my right arm is so well hidden it was immediately ruled out for use. The vein in my left arm is slightly better. After a consultation among three different nurses, one nurse didn't feel comfortable enough to attempt it, but the the other two thought it would be doable, just a bit challenging. The nurse was able to get the needle into the vein, but once the machine was turned on to draw my blood at a faster than normal rate, my vein collapsed and the blood flow stopped. The nurse tried to move the needle around a bit to get the blood flowing again, but it would always end up stopping a few seconds later. After about 15 minutes of this, they finally gave up. I had only donated 48ml of blood - not an amount that could be usable. I was told that in the future I should just stick with the normal "whole blood" donation. Since I had lost such a small amount of blood, I was told I could donate again right away. If my right arm actually had a vein they could use I could have done it right then. However they said I'll need to wait until the current vein in my left arm heals before coming back.

Hopefully I'll be back again next week for another donation attempt. It's just a slight discomfort and is definitely worth the minor inconvenience since it helps saves lives. Too bad my body doesn't seem to have a good design for donating blood.

Saturday, September 29, 2007

Learning Japanese

I'm trying to learn Japanese. Since Japanese doesn't use the alphabet for writing, my first task is to learn how to recognize the primary symbols used in Japanese writing. To complicate matters, there are actually three different ways of writing things in Japanese. There are two sets of phonetic symbols - Hiragana and Katakana - and then a very large set of symbols called Kanji, which mostly originated from the Chinese writing system. Unlike English with it's myriad rules of pronunciation and spelling, things written in hiragana and katakana are very easy to sound out. Each symbol represents a unique sound. However, kanji is a different story. Unlike Hiragana and Katakana, Kanji symbols (called characters) represent words rather than phonetics, so if you don't recognize a Kanji character, you have no way of sounding it out to know how to pronounce it. Fortunately, a lot of Japanese text is in the phonetic Hirigana and Katakana, so it's a good place to start.

Hiragana is the set of symbols used for writing normal Japanese words. Katakana is a different set of symbols used for writing words of foreign origin. Since each symbol represents a unique sound, there are quite a few more symbols than there are letters in the alphabet. In fact, there are 46 basic hiragana symbols, along with another 25 minor variations to some of these base symbols. Here's a picture showing the hiragana set:

Notice the block of 25 characters on the right are based on other characters in the main group from the left, but with simple additions. So, if you know the base character, it's pretty easy to know what sound the modified form is.

The other interesting thing about this table is it represents all the sounds used in the Japanese language. Every word is made from a combination of these sounds. Notice there are some sounds in the English language that don't exist in Japanese. There are also some sounds in Japanese that aren't very easy for an English speaker to pronounce. For example, try to pronounce tsu. If you've never studied Japanese or Chinese before, it's not likely to be easy to say it correctly.

As I already mentioned, there's also a second set of symbols - called katakana - used to write foreign words. This includes the names of non-Japanese people, the names of countries, certain modern inventions (computer), or other items not originally from Japan. Even the phrase coffee milk is written in katakana. (Surprisingly, while coffee milk tends to mainly be found only in the Rhode Island area here in the United States, it's actually a common item (along with coffee soy milk) in Japanese supermarkets. This was a pleasant surprise to this coffee milk fan.) Here's the katakana set:

So, when someone is first learning to read or write Japanese, there's an initial learning curve just to be able to know how to write the sounds of the language. And not only do you have to learn all these symbols once, you have to learn them twice so you can write them as both native language words and foreign words! It's a bit more to memorize than the 26 letters of the alphabet - even if you count both upper and lower case letters. And I won't even talk about then trying to learn the thousands of kanji characters used in every-day Japanese.

Given this large set of symbols to learn, I was looking for helpful tools to aid in learning them. I came across a pretty handy web site that lets you practice learning groups of characters. It can be found here: While the tool is quite simple, I found it very useful. It lets you check off different blocks of characters to learn and then it randomly presents them in flash-card form. I have found it easiest to work with learning blocks of 5 characters at a time. Then once I know those 5 fairly well, I'll go back and practice with the previous few blocks and this latest block. Then, once I'm comfortable distinguishing those characters, I'll do some practice sessions with all the ones I've learned so far mixed together. Working this way, I find I can get pretty comfortable with 15 or 20 new characters in an hour or so. But, after that hour of practicing I find I really need to give my mind a break.