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Daylight savings time

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Published on: March 29, 2004

The clocks went forward an hour on Sunday morning at 2am. Those of you reading in Tanzania may well not know what I am talking about.

The UK has moved into daylight savings time, meaning that here we are now one hour ahead of Greenwich Mean Time. Why? Since the UK is far from the equator, throughout the year the times of sunrise and sunset vary. In winter the sun rises later in the morning, and earlier in the evening. In summer the sun rises early, and sets late. Twice a year we adjust our clocks, and our lives, by one hour. It doesn’t really make much sense. We get up an hour earlier now than we would have done, but it doesn’t get us any extra light.

More discussion of this can be found on Wikipedia.

RSS me up!

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Published on: March 29, 2004

Well, today’s successful web fiddling is the new Links of Interest list on the left – you might have to scroll down to see it. This is compiled from an RSS feed automatically pulled from del.icio.us every hour.

Is that not some sort of overkill? Well, del.icio.us have the best online bookmark system I have seen. It is much easier to use theirs than write my own. Even though I had to get up to speed with how to parse XML with PHP. Sounds scary. I don’t think I know the half of it… Idle hands…

Musings

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Published on: March 26, 2004

Apparently, most blogs, which I admit is what this is, are added to once or twice, and then forgotten about. I haven’t forgotten about this one.

Problem is, since getting back from Tanzania, and for some time whilst I was there, I really haven’t felt like I have that much to say. Right now I am seeking work. It doesn’t really feel like something worth writing about.

I could list all the jobs I have applied for, but what does that mean? To avoid going mad on the job market you can’t become attached to any particular job. The over-riding factor in getting a job is luck, and the only tactic to add to the obvious ones (eye-catching well written CV etc) is to apply for as many jobs as you can manage.

Application forms are beginning to drive me nuts. Somehow the recruiters for many jobs I feel like applying for prefer to deal with application forms. I can’t stand out from anyone else’s unless I do something silly like write in pink ink. Most of these application forms ask all the questions I answer perfectly adequately on my lovely CV, and then leave a page which more or less reflects the covering letter I would send with my CV. The application form makes me sit down and spend an hour writing up what I already have worked hard on with my CV.

At least some application forms are downloadable word documents, which I can copy and paste to from my CV.

Ok, enough of that. Hope you enjoy the tiny icon that now appears on some browsers next to the address, Make your own from any image at Chami.com.

Currently looking for a good way of adding the links blog I set up at del.icio.us before I end up spending a week writing my own version…

Interesting, if slightly old, essay on the blogging phenomenon.

Activities

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Published on: March 22, 2004

Ok,

I have been fiddling around a fair bit with the site – some sort of displacement activity no doubt. Not much has changed. You will have notice that the controls have moved over to the left. This is part of my fixing a problem in some browsers, whilst maintaining some sort of logical order in the raw code for the page. Probably something only I was noticing. For those who care, this site is built using CSS and XHTML. I was using them specifically for building sites that show up in Internet Explorer. However I have since started using Mozilla, and the site was totally wonky. Spent Friday and Saturday mornings fixing it up. Works now, more or less.

I am working on the back end stuff behind the site so that it is easy for other people to add the system to their own site – as if there weren’t enough blogging systems out there.

Been talking with Dave and Paul about doing some work on Meantime. Particularly interested in getting some sort of blogging culture going on there. Another plan is to run a competition in the Arusha Times, where the winner gets blog space on this site. I have to think up a way of getting people to enter who will actually use the blog.

What should I write about in next week’s article?

Added some more pictures mostly for the start of this month.

Are you sitting comfortably

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Published on: March 20, 2004

Even in our small East African town more and more people are sitting in front of a computer day in day out, either because they must to get a day’s work done, or because they are hopelessly addicted to the stream of information available over the internet. These people do not realise they are in DANGER! Sitting in front of a computer all day is a hazardous activity. I am not talking about hackers, spyware or even the danger of electric shock. You are in danger simply by sitting in front of that monitor. Common problems include headaches, neck strain, back ache and wrist and forearm pain. Clearly using a computer is not as dangerous as your daily dalladalla journeys, but taking action to avoid the risks can improve the quality of your working life.

Refresh yourself

If you aren’t lucky enough to sit in front of a flat LCD monitor you will be using some kind of Cathode Ray Tube (CRT) monitor. These work by a beam (the cathode ray) scanning across the screen many times a second. The image on the screen changes with each scan. This causes the screen to flicker. The number of times per second that this happens is known as the Refresh Rate, and is measured in hertz (Hz). The lower the refresh rate, the more it is possible to notice the flickering of the screen. Many people find flickering lights bring on headaches and even nausea. A combination of fluorescent lighting (which also flickers) and CRT monitors can make things even worse. What is the solution besides popping down to the local computer store and buying a fancy LCD monitor? Increase the refresh rate of course!

To change the refresh rate click on the windows desktop with the right hand mouse button, and select Properties. In the window that pops up select the Settings tab, and then click the Advanced button. Another window will pop up. Click the Monitor tab on this window and you will see information about your monitor. There is a drop down list of Refresh Rates that your computer can use. By default, Windows uses 60 Hertz. Most monitors support rates of 75 or higher. If you change the setting and the screen goes blank, hit the Esc key to return to the previous setting. Increasing the refresh rate can make a noticeable difference to flickering, and can reduce headaches in some computer users.

Assume the position

Many computer users sit with their keyboards parallel with the edge of their desk, and the monitor sitting at an angle to the left or right. When typing the user has to twist their head to one side in order to see the screen. This can cause neck strain, especially when using the computer for long periods of time. Ideally, the monitor should be positioned directly in front of the keyboard.

Staring into space

Eye strain can also lead to headaches. You should avoid looking at the screen continuously for long periods of time. If possible you should look away from the screen for a minute for every fifteen minutes you are working. It has been suggested that this can reduce the risks of eyesight deterioration later in life. Regular breaks for your hands are also useful in preventing Repetitive Strain Injuries (RSI).

Basking in radiation

A lot of people use special filters which hang over the front of the monitor screen. These screens are supposed to filter out radiation from monitors. From what I have read there is no real risk from this radiation. It is a lot less than given out by mobile phones. So do you need a filter? If you use one, try using your computer both with and without. I have found that a lot of filters increase reflections, making it harder to read what is on the screen. This is another cause of headaches. Your filter may reduce reflections, in which case use it.

Using computers of course is very safe. You aren’t about to fall out of an open door at 80 kph, but you can make it safer and more enjoyable.

Links

And the winner is…

We have a winner for the competition to win a Microsoft 32Mb data key. Congratulations to Gervase Mlola, whose vision of Arusha in ten years time includes security guards in control towers monitoring the activity in the streets using cameras and mirrors. Big brother is watching you! Special mention to Georgette Byela, whose vision included robots directing traffic
around Arusha’s streets. Thanks to everyone who entered. Look out for another competition very soon.

Originally published in Arusha Times 312

March marches by

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Published on: March 16, 2004

Time is slipping by. I haven’t added anything for two weeks! Oops. What have I been up to in this time? Looking for work – so slow…

Meeting up with old friends I haven’t seen for a year or more.

Endless days surfing the web since I can dial up from home and it costs a tenner a month.

Learning some new stuff. RSS. More PHP and SQL.

Writing. I am still writing the InfoTech column for the Arusha Times and will continue till they stop publishing me. Stop and start short stories (mostly stop).

Thinking about how to improve this site (which probably means adding entries more frequently rather than messing with the underlying code). Not taking nearly enough photoshop.

Indulging in Japanese food! Mmmm.

Keeping track of what you like

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Published on: March 13, 2004

Time spent online costs money – whether you are watching Time-Keeper’s seconds tick away in an internet caf� or surfing on a broadband connection in the office when you should be doing something that brings in cash. If you are anything like me you fear that a lot of time spent online is wasted. I sit down at my computer in order to start writing this article, do some heavy programming on my web site, find out the latest news, or email my mother. What actually happens is this – I end up searching Google for that really interesting and useful anecdote I vaguely remember from a couple of weeks ago. It would be really cool to put it in an article or tell my mum. Google goes on to list hundreds of completely unrelated pages, one of which captures my attention. The next thing I know I have spent an hour jumping around the web without getting
any nearer to completing my important task. I can barely remember what I have achieved in the past hour. Time has been wasted, and time is money!

This problem is always going to arise when I am looking for something new. Surely there must be a way of keeping track of what I already know I want to find.

Bookmarks, or Favorites (sic) as they are known in Internet Explorer, are links you store within your web browser. You add your favourite pages, and can then access them from the Favorites menu. It is a feature built into web browsers since the very start. Somewhere along the line Google became so good at finding pages that I no longer felt the need for bookmarks. Sadly, these days I find Google less useful and wish I had bookmarked pages.

Creating a bookmark is really easy. When you are on a page you want to bookmark, just press CTRL and D – the link and page title go straight into your Favorites menu. You can a list of your bookmarks open on the left hand of your screen by clicking on the Favorites button on the toolbar (marked with a star). Your bookmarks can be arranged into folders, making it easy to find just what you want. Netscape and Mozilla use the more sensible name Bookmarks instead of Favorites – they work in exactly the same way.

You can also add bookmarks as buttons to the Links toolbar in Internet Explorer. To do this click on a link keeping the mouse button held down, and drag it to the Links toolbar.

Unfortunately, browser bookmarks are only really useful if you have your own computer. If you use an internet caf� to surf you won’t be looking at the same browser on each visit. Luckily, a number of web sites allow you to store bookmarks and access them from anywhere. Unsurprisingly, Yahoo! offers bookmark storage where you can upload bookmarks from your browser, in effect backing them up. Unfortunately it is not clear how you share them with other people. Another service worth a look because it is designed for sharing bookmarks is http://del.icio.us/ – very strange address.
You can see my list of bookmarks at http://del.icio.us/dunxd/. Not very long at the moment!

Bookmarks are great for visiting the same sites on a regular basis. But you can go a step further where all the information you regularly need is available at a single bookmark!

Many sites today, particularly news sites, publish in a format called RSS. This creates a special web page with headlines and summaries for each article that appears on a site. These RSS news feeds are designed so that the information on them can be extracted by computers and displayed in different ways. A number of sites exist which pull together RSS news feeds from different sources and display them all in a single place, often summarising them on a single page. NewsIsFree specialises in bringing together the latest news from the sources you want. You can subscribe to news from the BBC, CNN,
AllAfrica.com and thousands of others and see all the latest stories from them all on a single page. Bloglines also pulls in news feeds, but displays them in an email style way. NewsIsFree is better for finding established news sources, but Bloglines makes it easier to add RSS feeds you find for yourself.

There are also programmes which download RSS feeds to your hard drive, allowing you to view the contents offline. This is useful if you only connect to the internet occasionally – you can download the news headlines all at once and then read them while you are disconnected. Feed Reader is one such programme, available for free.

A site that has an RSS feed will often have a small red or orange box, or just a plain link with the letters XML or RSS in it – click on this to see the feed. Copy the address of this feed into NewsIsFree or Bloglines to subscribe to it.

All this is supposed to save you time. However, if you are anything like me you might end up adding every web page you visit to your bookmarks and subscribing to every RSS feed you find. Hopefully someone will soon come up with something that helps me make a favourites list of my Favorites.

Useful Links

Originally published in Arusha Times 311

Local ISP Celebrates 10th Anniversary

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Published on: March 6, 2004

Ten years ago this week a small group of Arushans switched on a computer, turning on the email service that would grow into one of Arusha’s most reliable internet service providers – Arusha Node Marie.

Now and then

Today, to the surprise of many visitors to the town, people in Arusha are able to take a decent connection to the internet for granted. With internet cafes on almost every street corner getting access to your email is cheap and relatively straight forward. Ten years ago the situation was very different.

Before 1994 accessing email was only possible by making a telephone call to a server in Nairobi or Europe. The low quality of Tanzanian phone lines slowed email reception to a snail’s pace and that was if you could get access to a phone line! Costing as much as $300 a month, email was something only larger businesses could afford. Smaller businesses relied on faxing and telephone to communicate with foreign business partners and clients – also an expensive affair.

In February 1994, twelve individuals and businesses decided to set up an email node in Arusha to lower costs and open up the technology to the local market. They christened it Arusha Node Marie (ANM), after Marie Benson. Marie had acted as the repository of information for the group, and thus represented what the group hoped their service would provide to the greater community. She also helped ANM leapfrog the 5-10 year wait for a phone line by donating hers.

The ISP would be a membership organisation rather than a business, with a company, AFAM, contracted to look after the day to day running of the equipment.

Milestones and stumbling blocks

The first service available to members was just email. Using the FIDO network, ANM’s server would dial into a UK or Nairobi node. At speeds of 2.4 kbps it would take up to one hour to send and receive all the emails. Members could then dial in to the local server once or twice a day to send and receive their messages.

The connection was very shaky, with frequent disconnections due to noisy lines and the quirks of the TTCL telephone system. Erik Rowberg recalls:

Sometimes for more than 24 hours the phones were too poor and we kept getting disconnected. We would resort to carrying the mail server and modem to different offices to see if their phone lines were better.

To make this simpler a laptop was bought.

In 1996 Arusha Node Marie brought full access to the internet, including the web, to its members. Connection speeds were very slow – 19kbps (kilobytes per second) compared to today’s speeds well over 100kbps. Few people in Tanzania had seen what the internet made possible at that time. The wow factor was significant and the popularity of the service began to grow.

People behind the scenes

Arusha Node Marie has been pushed forward not only by developments in technology but by the people who have worked to build its abilities and reputation. Erik Rowberg was the sole employee at the beginning, attending to the fledgling server’s needs from day one.

Since those early days, ANM has grown to 40 staff and over 800 members. Previous members of staff have moved on to prominent roles at other dynamic technology companies in Tanzania and further afield.

The Technology

Slowly the services ANM provide and the technology they employ to deliver them have grown from simple email on a single laptop to full internet services ranging from cached web access to database management on a cluster of eleven servers with battery power backup.

The mail server now handles upwards of 15,000 emails a day. 25% of these are rejected as junk mail, but the rest are legitimate emails fuelling the business and social lives of Arusha.

The proxy caching server handles up to 60 requests per second for web pages, and stores them so the next person doesn’t have to wait to view the same web page.

The connection to the outside world is made by a satellite connection. Data is received at 3Mbps (3,000 Kbps), and can be sent at 1Mbps. This is backed up by a second connection at a different location so email can still be received in the unlikely event of equipment failure at the AICC.

The Future

Ten years, and Arusha Node Marie have come a long way. This begs the question: What about the next ten years? I posed this to David Erickson, Operations Manager at AFAM:

In ten years time connections to the internet in Tanzania will be as fast as you can imagine, thanks to a fibre optic connection down the East coast of Africa by 2006. The Tanzanian infrastructure will be managed by companies and organisations sharing and linking their networks. All telephone calls will be made over the internet. Local businesses will really start to take advantage of things like remote process monitoring and enterprise resource planning. Arusha Node Marie will be at the forefront of providing these services and
pushing the envelope of what is possible in Tanzania.

Web Sites

Arusha Node Marie

Originally published in Arusha Times 310

Clamped blood transfusion van

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Published on: March 5, 2004

Something about this just seemed wrong…

London post box

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Published on: March 1, 2004

A nice red London post box. Left slot for first class and abroad, second slot for second class.

«page 2 of 3»
Status

dunxd: Sunrise, Baby cries, Wave goodbyes, Into the skies.

(Updated 7 days, 23 minutes ago)

Photos
Mexican Gallery - Ash took a shine to this figure in the Mexican Gallery at the British Museum. 201201_Kai_004 Trying out new balancing skills - Ash came with us this time around. Shield and Sword
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