Archive for the 'Sci & Tech' Category

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Unscientific Questions

I watched an excellent programme on BBC One last night, called the Narnia Code.

One of the points of the documentary was that CS Lewis preferred a medieval understanding of the universe to the modern scientific one, which he claimed made things cold and mechanical.

A couple of the interviewees (which included John Polkinghorne) made this point: science is very good at answering its own questions (how does this work, what happens if we do this, etc).

But there are two important questions that science can't answer:

Why is there something rather than nothing?

Why is nature ordered and comprehensible?

I'm sure there are others, but these two are a good start.  This is from The Voyage of the Dawntreader:

"In our world," said Eustace, "a star is a huge ball of flaming gas."

"Even in your world, my son, that is not what a star is but only what it is made of."

We need to ask both kinds of questions, I think – and use science and theology together to enrich our understanding of the universe.

Cricket Referrals

I enjoy listening to Test Match Special (TMS) on BBC Radio 4 – usually.  During the current test series there has been a lot of fuss about the new referrals system, which is cricket's attempt at using modern technology to ensure accuracy in umpiring decisions.

They seem to me to be making a bit of a shambles of it.  They have got a mix of the implementation of technology in tennis and in rugby – the teams can question an umpiring decision that they disagree with.

This seems to me to be a nonsense.  In rugby, the umpire makes the final decision – and has the option of referring it to the video referee if he has any doubt.  This would seem to me to be the best way of implementing technology in cricket as well.  The referee's decision is final – but if he has a doubt about (say) an LBW or a run-out, he can ask the fourth official.

Then the teams have no say in it.  The umpires always have the final say – just like in rugby.

Gmail… ooops

Gmail ErrorOoops – Gmail has a major server error, not just on Gmail itself, but also on Gmail for Apps.  The web is afire with complaints, and the BBC are reporting it here.  For the latest status updates, the Gmail help and status page is here.

This must be a pretty major error, as it appears to be affecting pretty much everyone – except that I can read my emails on my iPod!  I have no problems connecting there.  The trouble is, of course, I think this may be affecting delivery of emails too – although I can see my inbox, there's no new mail.  Of course it could just be a slow day...

Mac Printing

Another stupid problem with Mac printing – I upgraded to OS X 10.5.6, and my Canon MP610 stopped working. I removed it, but when I tried to re-add it, I got an error message: Error 9672, unable to add printer.

I tried restarting my Airport Express, turning the printer on and off, but nothing seemed to work.

Fed up, I reinstalled the printer driver, and restarted OS X – and that has done the trick.  I have printing back!  Message to Apple: when installing a Service Pack on many, many Windows machines, stuff like this hardly ever happens.

Is this problem with OS X 10.5.6 just me, or has it affected other people as well?

Switching to a Mac

Well it's been about five months or so since my shiny new MacBook Pro arrived, and I thought I'd share some of my thoughts, as an experienced Windows user of many years switching to OS X.

My first thoughts were that it looks, quite simply, amazing.  The graphics are smooth, the way it displays fonts is miles better than Windows.  Spotlight works better than Windows Search, it's faster and more accurate.  The various features like stacks, Time Machine, Spaces, Exposé make it great to use.  I have to say I prefer navigating files and folders in Windows Explorer than in Finder, but I'm getting used to it.  And anyway, I'm mostly using Spotlight to find things anyway.

As with any new thing, there are certain annoyances, things that OS X does in a strange way, that I find difficult.  There are also things that I find helpful to deal with the different Mac behaviour.

Home/End Keys

In Windows, the Home key jumps to the beginning of the line, and Ctrl-Home to the beginning of the document.  Likewise the End key with the end of a line/document.

On a Mac things are different.  To get the same behaviour you have to press the Apple Key+left arrow/right arrow.  Even on a keyboard with Home/End keys.  So I downloaded Double Command, which has an option to use PC style Home/End keys.  Much more sensible.

Forward/Back

Now, this is really stupid.  To navigate forward or back a word, you press Alt (which is also called the 'Option' key) and left/right arrow.  To select text at the same time use Alt+Shift+arrow.

To delete a word backwards, use Alt+Backspace.  But to delete a word forwards, you have to use Apple Key+Delete.  Now, can someone enlighten me as to the reason for that?  On a PC, pressing Ctrl with an arrow or delete button affects the whole word.  Simple.

The Mac behaviour isn't difficult to get used to, it just annoys me.

App Cleaner

One of the best things about OS X is that there is no registry like Windows.  When you install an application, usually you just have a single file (which is actually a folder, though you can't see its contents) for your application, and maybe a preferences file or folder in your Library directory.

This makes for a much cleaner operating system – but it means that there is no 'Uninstall' app in OS X.  To get rid of an application you just delete it from your Applications folder.  But that leaves any preference files/folders in you Library directory.  Hence the very useful AppCleaner, which searches for those and deletes them too.

Mac Office 2008

It might seem strange to get a Mac and install Microsoft software on it, but I actually like Office, it gets the job done and it's cheaper on a Mac anyway.

Word 2008 is ok (except for a really annoying Word Count bug where the 'live' word count is WRONG), it's like an updated version of Word 2003 for PC.  This is because OS X forces the use of a toolbar (the grey thing at the top of the screen), so the new Office 2007 'ribbon' wouldn't work on a Mac.

Excel is terrible.  I used to use Excel a lot for work, so I know it backwards.  And Excel 2008 for Mac is just awful.  It doesn't have Visual Basic support for a start, so none of macros works.  The default layout is awful, and I just hate using it.  So I use Excel 2007 on a Windows Vista Virtual Machine instead.

Don't even think about using Entourage – Mac Mail, iCal and Address Book are so much better.  And PowerPoint is fine, but not as good as KeyNote.

So, overall, do I wish I had bought iWork?  Probably, yes, but when one of the 'great new features' of Pages '08 is that it 'automatically formats lists as you type' I was a bit suspicious.  It also seems heavily based on templates – I prefer to have my own layouts.

I may get iWork to see what it's like – I'm a technophile after all – but at the moment I'm sticking with Word.

Stability

One of the much-vaunted benefits of having a Mac is the inherent stability of OS X.  I would agree, in general – however I have noticed complaints among seasoned Mac users that OS X 10.5 (Leopard) is the least stable Mac OS.  I can confirm I have had a few crashes – one last night in fact as I tried to turn my laptop off.

However, I have had far fewer problems than I have had with Windows.  For example, updating a driver last week caused my PC to die spectacularly (it was a graphics driver), and I had to do a full repair (reinstallation over the top) of Windows – and that was even XP, which is far more stable than Vista!  Overall, I have had far fewer problems than Windows, but I am looking forward to OS X 10.6 (Snow Leopard), for which Apple are concentrating primarily on performance and stability.

Printing

By far the biggest problem I have had with the Mac is printing.  I am using a Canon MP 610, which is one of Apple's recommended printers for Mac.  However, the Canon driver is simply not good enough, especially when trying to print double-sided.

Actually this raises a bigger point: the reason Apples are so much more stable than PCs is that Apple has total control over BOTH the hardware AND the drivers.  Windows, on the other hand, is expected to work with pretty much anything.  So, I have noticed that third-party drivers (e.g. for the Canon MP 610) are significantly more stable on Windows than Mac OS.

For 'more stable', read 'they actually work all the time.'  I use booklet printing for my sermons, and I have had such trouble printing them out – sometimes identical settings work, sometimes they don't work.  Grrr!  Hear the frustration!

Conclusion

Overall, however, I love my Mac.  The user experience is (almost always) a joy.  Occasionally I miss Windows (especially Office 2007) – running it on a Virtual Machine (VMWare Fusion) is ok, but nothing like running it natively.  However, I can cope with it given the rest of the experience.

Netgear DG834G and Wireless Repeating

I have a problem with my MacBook Pro – its metal case weakens the signal of my wireless network, meaning that I can't access the internet in my lounge.  That is rather annoying, because that's where the comfy sofa is!

A recent firmware update meant that my trusty DG834G v3 had Wireless Distribution System added as a feature – both bridging and repeating.  So I decided to buy a second DG834G (this time v4), to repeat the network downstairs and to be a backup wireless router in case my old one dies.

Sound easy?  Anything but.  There are absolutely no instructions on the Netgear site about repeating with two DG834Gs.  I found instructions on repeating with other hardware, but the options were not quite the same, and it just would not work.  I tried repeating, bridging, all kinds of variations, WEP, WPA, and nothing was working.

I was beginning to wonder if the repeating 'feature' was added to make the DG834G look better than it really is.

And so after several hours of frustration I emailed Netgear support, and they sorted me out.  If you are having this problem, follow the instructions below to the letter and you will get wireless repeating working.  The key part is the security encryption.

  1. Make sure both routers have the latest firmware.  The best way to do this is by plugging your computer into the ethernet port, rather than doing it over the wireless, in case there are any problems.  Make sure you download the correct firmware for your router version (I think WDS only works on v3 upwards).
  2. On the 'internet' DG834G, go to the 'Advanced Wireless Settings' page and ensure 'Enable Wireless Bridging and Repeating' is checked.
  3. Select 'Repeater with Wireless Client Association' and enter the MAC address of the 'repeating' DG834G in the boxes for 'Remote MAC Address 1′.
  4. Click 'Apply'.
  5. Now go to the 'Wireless Settings' page and enable WEP security.  Do NOT enable WPA, or it won't work.
  6. Choose '64-bit'.  Again, if you choose 128-bit, it won't work.
  7. Enter a phrase, and the DG834G will generate your hexadecimal passphrase automatically for you.
  8. Click 'Apply'.
  9. Now click on 'Setup Access List' in the middle of the page.
  10. Ensure 'Turn Access Control on' is enabled.
  11. Add the MAC addresses of all the devices you want to be able to access your wireless network.
  12. Click 'Apply'.
  13. Now go to the 'LAN IP Setup' page, and change 'Ending IP Address' to 192.168.0.99.
  14. Click 'Apply'.
  15. Now unplug your computer from the 'internet' DG834G, and plug it into the 'repeating' DG834G.
  16. Repeat steps 2-12, making sure you duplicate all MAC addresses you entered into the 'internet' DG834G.
  17. Once you have performed step 12, go to 'LAN IP Setup', and change 'IP Address' to 192.168.0.100.
  18. Now make sure that 'Use Router As DHCP Server' is unchecked. [Edit: if you leave this checked, usually the 'internet' router assigns the IP address to your computer, but sometimes the 'repeating' router does - and then you can't access the internet.  Better to leave it unchecked.]
  19. Click 'Apply'.
  20. Now unplug both DG834Gs.  Put each in their proper locations.
  21. Plug the 'internet' DG834G back in.  Wait until all the status lights (especially the wireless light) are green.
  22. Now plug in the 'repeating' DG834G.  The status lights will come on, including the wireless one.
  23. If you now plug your computer into the 'repeating' DG834G you should have an IP address where the final number is less than 100, and you should be able to access the internet (as long as the 'internet' DG834G is accessing the internet!).
  24. Congratulations, your wireless network is now be extended!

The reason why you enable 'Access Control' is that WEP 64-bit security is barely worth having.  It is better than nothing, but is easily cracked by a determined hacker.  So by limiting the devices that can connect to the computer, you hugely reduce the risk of someone hijacking your network.

VMware Enter Key

I have recently taken the plunge and bought myself a Mac.  I love it – for a long-term Windows user there have been the inevitable confusions and frustrations (the weirdness of skipping/deleting entire words is STUPID – Ctrl-Arrow and Ctrl-Delete is so much easier and more sensible).

Anyway – one of my biggest frustrations was using VMware Fusion to run Windows.  Yes, I still have some applications that need Windows – not least Excel, which is absolutely awful in Mac compared to a PC.  And I discovered that the Enter key on the number pad simply will not work as an Enter key.

I spent ages looking for a solution, mapping keyboards in Windows etc etc, and finally I found this.  I believe it is in Italian, but the instructions are clear enough.  Shut down VMware Fusion and open this file in TextEdit:

~/Library/Preferences/VMware Fusion/preferences

Then add this line to the bottom of the file:

pref.mapISONumpadEnterToAltGrEnabled = "FALSE"

Open VMware Fusion again, run Windows, and, hey presto, you have an Enter key again!  Of course, you won't have an Alt Gr key, because that's what VMware use the Enter key for by default.  Why they didn't leave it as the right-hand side Alt key, I'll never know.

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