UW-Madison
Computer Sciences Dept.

Amos Ron

Professor of Computer Sciences and Mathematics
Picture of Amos Ron
Research Interests:
Approximation theory, wavelets, Gabor systems, splines, polynomial interpolation, data representation, frames, scientific data, applications.


Amos Ron's Personal Page is presently under
It is slated to contain info about:

Travel such as my favorite hotel clubs, and the best way to earn free hotel nights.

Collections as a child, I used to collect stamps (I have an almost complete set of Israeli stamps between 48-72). These days I collect credit cards.

My addictions Uneducated people connect the word "addiction" to substance abuse and gambling. Well, that's completely wrong...

My health My late grandma used to tell me not to eat while standing, since `the food will go to my legs'.

Learning Korean (past) and learning Chinese (present) I used to think that learning a far-eastern language is practically impossible. I changed my mind after visiting Korea in the fall of 2005. Then I even changed my mind about Chinese, after meeting one day (at denver airport) with an american who makes living by real-time Chinese-English translation.

Travel


I need to write that part fast, since hotels, for example, change their program rules very often. Hilton points used to be a great deal. Not any more. Holiday Inn points were as good as Hilton. They also lost a lot of their glamor, but not as much as Hilton. I assess the value of hotel points using the following metric:

1. The ease of accumulating points. That's usually the good part, but also the misleading one (after all it is easy, for example, to accumulate miles. The hard part is to spend them.)

2. The ease of getting a free hotel room. Holiday Inn is fabulous here. The rest are also pretty good. That sets hotels apart from airlines.

3. The stability of the rules. Here the airlines are great. They last changed the cost of a ticket (from 20k to 25k miles) about 15 years ago. Hotels? just the opposite.

4. The "value" of a point computed by dividing the market cost of the hotel room by the point charge as a free night. E.g., if the room costs $150, and you pay instead 15k points, that every point is worth 1c, provided that you cannot find an alternative room of the same quality but for lower price at some other chain. As a rule, 1c per point is a good deal.

5. I have gone a long way since starting to write this part (around 06-07). Eventually, I realised that the best strategy is stick with one program, and chose the Holiday Inn since they are by far the best. By now, I am a platinum royal ambassador of the chain, which for all practical purposes means that I stay more or less at each hotel at the best room that they have (as an upgrade). It is completely unimaginable to realize how far loyalty to a chain can pay off (and of course you need to spend many night a year at that hotel. I have been far more than 100 nights at IHG hotels during 2009).

Collections: credit cards


Why credit cards? Let me just say that the credit card industry is one of the most intriguing financial industries in the U.S. Want to know more? what was the last time that you really read the fine print of your credit agreement? are you one of the oldies who accumulate miles via cc charges (which is outright dumb, even if your airline won't go bankrupt). want to know the whole story? stay tuned.

  • What are credit cards good for?.

    There are three major ways your credit card can benefit you:

    1. You can get cash rebates on your card. Cash rebates can be as high as 5% (E.g., the older version of Citibank dividend card. If you have the card make sure you use it frequently. otherwise Citi might downgrade you card to their current 2% one). Getting 1% is widely available. Avoid cards that offer miles (the miles are on par with 1% cash, at best. and the card usually charges an annual fee). If you find a card that offers 2% cash rebate on everything, that's a deal (I have an AE that does it, but the card is not available any more: the rule is that good deals do not last long. I used to have a Citibank Ford that gave 5% rebate toward the purchase of a new car. Three years into the program Ford realised the kind of money that they lose, and canceled the card. I still managed to save a total of $5k on two different Ford cars. That was a bad deal, of course, I mean the cars).
    Avoid "award cards" that promise "valuable gifts" for accumulating points. These cards work like 1% rebate cards, but make it harder to pocket the money.
    2. The next reason for having a credit card is for borrowing.

    My addictions


    in fact, I bet that most people do not recognize the fact that they are addicted to something (and many do), and most addictions are either benign or positive. For example, I am addicted to coffee.

    My Health

    Since then, I have always been skeptical about the merit of proper diet (treating almost all statistical `evidence' as the result of some random process. Smoking has always been the notable exception. I quit 25 years ago) Well, not any more: after avoiding the flu and all types of viral cold for more than ten years (while having once or twice of these in each of the preceding years), I made my own scientific excursion, and was stunned to see the amount of evidence that supports eating (and drinking!) certain types of food. Of course, everything starts with coffee; but coffee is not alone. more to come. In the meanwhile, here is the person who changed my life.

    Learning Korean and Chinese


    1. I started with Korean in 2006 since Korean is so easy. Korean is easy since (1) it has only 14 or so consonants (which can be pronounced each in multiple ways), (2) it has only 150 or so vowels, (3) it is actually not one language but five different ones, and you need to choose the right one according to your relative seniority and level of familiarity with your counterpart. Sounds simple, right? It is really simple: for example, the words "oni?", "wayo?" and "umnikka?" all mean "do ... come?" and are all derived from exactly the same root ("upnida", pronounced as "umnida") by well-structured rules. Did I tell you that Koreans will omit from the sentence words that are not essential to understanding the meaning (e.g., the subject of the sentence)? ... Yes, yes, I like challenges.
    2. In 2008, I decided that Chinese is also quite easy. You see, you just need to memorize no more than 3000 characters, and you can read 99% of Chinese! There are no more than 35 vowels in Chinese, and each can have 4 different intonations, so we are talking about a mere 140 different vowels. Adding to the simplicity is the fact that some of the characters that look similar may even be pronounced similarly (most of the time this is not the case). I decided that life is short and that my Chinese can do with 500 characters (if you learn the right ones this gives you control over 80% of the characters). Right now I am over 400, so may not stop at the 500... My laoshi (teacher) is my former TA Shengnan Wang (whose name means, for my level of Chinese, the king of the southern victory. However, if you choose the wrong characters for "wang", "sheng" and "nan", you get instead the death of the hard life). Chinese is so trivial to learn that I may learn Korean in Chinese characters. zai jian!

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