Avinash Meetoo: Blog

The Rajiv Gandhi Science Centre which is at Bell Village is one of the most well-kept secrets in Mauritius!

We went there two weeks ago with average expectations… We payed (I believe) Rs. 30 for a ticket. The first nice surprise was that there were a lot of things to experiment with in the yard. Things like using parabolas to transmit sound very efficiently (3rd picture) and lots of optical illusion experiments (4th and 5th pictures above.) As you can expect, the kids were having a lot of fun. And Christina and I were happy to answer all their questions.

Inside we got our second surprise: there were so many things to see (the story of the universe, the geological story of Mauritius, lots of background info on great scientists, etc.) and also so many things to experiment with (see the photos.) Anya, Kyan and their cousin, Chloé, were running everywhere trying out things and having a lot of fun! As a scientific, I was ecstatic. I couldn’t prevent myself wondering why some science classes (at primary and secondary levels) were not done there. I’m sure students would have understood a lot more.

I have to admit that there are some problems. Some of the experiments have stopped working and should be repaired. Applying fresh paint would not be a bad idea at all especially outside. But apart from those “details” which are so easy to remedy, the Rajiv Gandhi Science Centre is a great place to go to spend some hours and learn a lot at the same time.

Go there one day and I’m sure you’ll like it. We did.

(Click on the picture above or here for additional photos.)

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written by avinash

iPhoto is an excellent Mac OS X application created by Apple which is used by countless amateurs (like yours truly) to manage their digital photo collection. Since the release of iPhoto ‘08, a lot of people have wondered how to do an incremental backup of their library as this latest version of iPhoto keeps the library in a package (a special type of folder) instead of a plain folder and some backup applications have trouble with that. (An update: I tried doing the same thing with the latest HFS+-aware version of rsync 3.0 but I couldn’t do it as it seems to me that rsync does not copy all the metadata created by Mac OS X. Maybe I missed an option…)

I’ve managed to do incremental backups (i.e. quick and painless) using my registered version of SuperDuper! It’s important to use a registered version of SuperDuper! in order to do smart updates which is what SuperDuper! calls incremental backups. The non-registered version of SuperDuper! cannot do incremental backups which means that the whole iPhoto library will be copied over when doing a backup (which means 15Gb in my case…)

This great backup software is normally used to backup a whole partition (i.e. my MacBook’s hard disk) to another partition (i.e. a partition on an external drive which can then be used to boot the MacBook.) I’ve just realized that it’s relatively straightforward to restrict the files to be backed up to a selection (i.e. your iPhoto library only…) and, instead of the destination being a partition, to choose a sparse image (i.e. a special file containing other files and which takes up only as much actual disk space as the data contained within.)

Step 1

First of all, select the partition where the iPhoto ‘08 library resides in ‘Copy’ (mine is Multimedia.) Then select where the sparse image will reside (I chose a folder on another disk.) Then you’ll have to create what SuperDuper! calls a copy script which will be used to indicate what to copy and what to ignore. To do that click on the drop down next to ‘using’ and choose ‘New Copy Script.’

Step 2

Write a nice description and make sure that the ‘Allow the user to select this script’ is ticked.

Step 3

In the ‘Included Scripts’ tab, click on the ‘+’ and choose the predefined ‘Exclude all files’ script. This is to make sure that SuperDuper! only backups those files and folders that you’ll explicitly specify and ignore all the rest. This is essential.

Step 4

Then, in the ‘Script Commands’ tab, navigate to the folder where the iPhoto library is found and select it. Click on ‘Add Item’ and it will be added in the top part of the window. The default command is ‘ignore.’ Change that to ‘copy.’ As you can easily guess, this, combined with the ‘Exclude all files’ seen previously, will tell SuperDuper! to only consider the iPhoto library and nothing else which is what we want.

Click on ‘Close.’ and give a sensible name to the script (’Backup iPhoto library’ is nice…)

Then you can click on ‘Copy Now’ and, voilà, an incremental backup is done! Remember to use a registered version of SuperDuper!

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written by avinash

A lot of bloggers I know display Google advertisements on their respective blogs in order to earn some money. Naturally, I also have two Google advertisements on every page of this blog for exactly the same reason… (I’d like to point out that I have not received any cheque from Google up to now.)

This service from Google is called Google Adsense.

I got a comment today from Josh who told me that I need to have a privacy page on this blog to comply with Google’s Adsense latest Terms and Conditions. Using Google (what else?), I discovered a blog entry by Jennifer Slegg explaining in details the changes brought by Google. The most relevant paragraph is:

You must have and abide by an appropriate privacy policy that clearly discloses that third parties may be placing and reading cookies on your users’ browser, or using web beacons to collect information, in the course of ads being served on your website. Your privacy policy should also include information about user options for cookie management.

The idea is to make explicit that Google uses web beacons aka web bugs and cookies to track visitors. I suppose this brings some peace of mind to Google lawyers.

Then I realized…

This blog, noulakaz.net, is in violation with the terms and conditions and Google might terminate my Adsense account anytime. Fortunately, Jennifer Slegg has also thoughtfully written a sample privacy policy which she has made public. I read it and realized it was much too long for my blog. With some cut and paste, I finally came up with:

The privacy of visitors to noulakaz.net is important to me. Like most other websites, I collect and use the data contained in log files. I do use cookies to store information, such as your personal preferences when you visit my blog. To support my weblog, I also use third party advertisements which may use cookies and web beacons. You can choose to disable or selectively turn off our cookies in your browser settings or by managing security preferences. However, this can affect how you are able to interact with noulakaz.net as well as other websites.

Nice and compact! I’ve added this to my About page.

15 Common Mistakes

Not having a privacy policy was a mistake. But it’s arguably a cosmetic mistake. The baddest mistake as far as Google Adsense is concerned is for someone to click on his own Adsense ads or get them clicked for whatever reason (e.g. click on my links coz i need to pay for my hosting.) I came across this list of 15 Common Mistakes that violate Google Adsense Terms & Conditions and I would strongly advise all bloggers using Adsense to go through it once or twice.

Addendum

The “Software Failure / Guru Meditation” picture shown above should bring tears to those happy few who had an Amiga 15-20 years ago… To the rest, this is what we got when the Amiga crashed. No blue screen of death. No core dump. Instead, we had a flashing Guru Meditation message. People were cool at that time…

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written by avinash