Archive for August, 2011

The Traditional Queenslander Home

To some eyes, Queensland’s familiar timber and tin homes lent Brisbane, and other Queensland cities and towns, a particular temporary, insubstantial air. Known as 'A Queenslander’, they seemed so much less solid and permanent than houses built of brick or stone. Many Queensland houses were perched high in the air on tall stumps, as the supporting pillars were always known as, and seemed likely to simply fly away.

The Queensland house was relatively inexpensive when trees were plentiful, easy to move from place to place, and, in a relatively benign climate, single skin, unlined walls were all that were considered needed to protect dwellers~people~the dwellers within} from cold. Sturdy corrugated iron roofs stood up to heavy tropical rain and could be re-used if moved by cyclonic winds.

Verandahs sheltered people from the burning sun and also caught any breeze that might be passing during the steamy summers. Coverings outside window openings meant that windows didn’t have to be closed when humidity brought rain. Clever little revolving tin cylinders on the roofs removed hot air that had been drawn into ceiling spaces through decorative fretwork openings.

Although timber is not a particularly effective insulator against either heat or cold, air could flow along long central hallways in a typical Queensland house and across the house from an open window on one side through open doors to the open window on the other side. Some exteriors were painted, others were simply oiled. Some verandahs were decorated with elaborate and expensive iron lace; others made do with simple timber dowels and carved timber decoration in pediments over the front entrance.

Despite the impression of apparent impermanence, the Queensland house has survived since its first appearance in the mid-nineteenth century. However, it has evolved. The simple two-room or four-room cottage has given way to large, sprawling homes. The pattern of the Queenslander home can be translated into early types of kit-set houses.

Many were manufactured by companies in Brisbane and transported long distances as flat-packs on trains. Selections of verandahs, tongue and groove boards for walls and sheets of corrugated iron for roofs were available at the destination for assembling. The public housing movement that produced workers cottages adapted the basic materials to different shapes and sizes suitable for lower-cost housing.

After the war, the Queenslander seemed out of date in a world of modem architecture. Brick houses, American ranch style residences and other imported styles began to populate new suburbs. However, Brisbane is a hilly city and even modem designs often adapted the idea of stumps so that houses could be close to the ground near the top of a rising allotment and high where the ground angled away. In the late twentieth century, the old materials, tin and timber, were given new currency by innovative architects to create distinctly modem, light and airy Queensland homes.

In the 1970s and 1980s, when a drift back towards the inner suburbs attracted a new generation, old Queenslanders were discovered by younger owners. They painted them lovingly and added various renovations to bring an old favourite into the modem era.

However they originated, whether from sugar planters houses in the West Indies, bungalows in India or high houses in Malaysia, the Queenslander still distinguishes Brisbane from the other Australian capital cities.

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RGB verses CMYK Colours

For the colour printing of your digital files, you must supply the graphics and images in the right colour mode. Many software programs will let you to work with RGB colour mode or CMYK colour mode. RGB colours or Red-Green-Blue colours are known as the primary colours of the light. This combination can be seen on your t.v. or computer monitors. Digital cameras and scanners also create pictures with Red-Green-Blue colour combinations. Red-Green-Blue colour mode ought to be in use while taking photos that need to be viewed on a monitor, emails or CD.

All the colours of the light spectrum are created from primary colours, but monitors can display only a limited colour range from the spectrum able to be seen. Light is sent by the monitor, and the printing ink recognises only a particular wavelength of colours. All three primary colours are combined to create white. If all three primary colours are missing, then the light will show as black. By combining various intensities of RGB colours, each mixture produces different colours. The monitor of a television or a computer consists of small units called pixels. Each pixel contains three units of light, and each unit represents red, green and blue.

You cannot see individual pixels with the naked eye as they are so tiny. Each pixel is developed by the application of correct values of RGB, and without the proper values of the colour units, you will not see any image displayed on the screen. The values of RGB colours are calculated mainly by three methods. The first method is to set them with the help of different numeric values. The numeric values used for this purpose are the values from 0 to 255, and this is the superior method of the three.

The second method is by using hexadecimal notations. This method is mainly used for HTML and other languages of the computer. These notations follow a logical pattern. The hexadecimal notation consists of six characters, and these characters are divided into three. The first pair represents the red, the second pair green and the third pair as blue. Each pair is represented by a hexadecimal number (0-9) and the letters (A-F). The third method is the percentage in which a certain percentage represents each colour. The programme translates these percentages into suitable values ranges from 0-255.

CMYK colours or Cyan-Magenta-Yellow colours are subtractive colours, whereas RGB colours are additive colours. Additive colours refer to light, whereas subtractive colours refer to inks, paint or pigment. CMYK mode is used for printing as all kind of printers use subtractive colours to result in different colours. When three additive colours are combined, the combination will produce white colour. But when three subtractive colours are combined, the combination produces black colour. This difference develops a great diversity between the print and the monitor display. Additive colour throws the light from the monitor, and if more light is projected from a particular pixel, it will be closer to the pure light. In the case of printer inks, they absorb light and reflects only the wavelengths of light that is linked with the colour of the ink.

The inks of the printer take away the non-essential wavelengths from the light that falls on the ink. The remaining light will return to the eye, resulting in the impression of a variety of colours. If you are mixing even more colours, then more light will be absorbed by the ink and a lesser amount of light will get reflected to the eye, and that results in darker colour. Black ink produced by the CMYK colours isn’t the strong black. So you must add black ink to produce the best results for receiving true black. If you would like to have a stronger tone of any colour, you have to add black in CMYK mode.

What about the lighter shade of colours? As white ink cannot be created using CMYK colours, you have to work under the hypothesis that you are printing colour on a white paper. As tiny dots of inks are used to print images you have to use the inks in a lower percentage to receive lighter shades so that more white colour is seen among the dots. The values of CMYK colours are calculated with the help of four different percentages. The values of each percentage should be between 0 and 100 so that the total percentage of the ink values can be up to 400%. But if the total percentage reaches 400%, the ink will take more time to dry. And so, the total percentage of ink should not be more than 300% in CMYK mode.

Both of the colour modes have limitations. The images resulting using RGB mode cannot be converted smoothly into CMYK mode because of the brightness of RGB colours. Similarly, CMYK colours can not be translated into RGB mode as the sharp look of RGB colours is missing in CMYK mode online. This is the reason why RGB colours are used in monitors and CMYK colours are used in printers.

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Moodle Learning Management System (LMS)

Moodle is a learning management system (LMS), a piece of software designed using sound educational principles, to help people create effective web-based learning experiences. Moodle has a large and diverse range of users with over 1,000,000 registered users on the Moodle Community site, speaking over 75 languages in 200 countries.

This group includes developers, educators, system administrators and business users. Validated registration statistics indicate there are more than 35 million users of Moodle software, globally.

Moodle is provided freely as Open Source software. This means Moodle is copyrighted, but the software can be changed and customised to suit your organisational needs. Due to this, Moodle has an active web community of developers who contribute additional features to the application as requested by educators, administrators and business. Benefits include:

1. Promotion of social constructionist pedagogy through learning activities such as blog, chat, comments, forums, messaging, rss, tags and wiki;
2. Enables web-based user activity monitoring, assessment, feedback and grade book functionality;
3. Suitable for 100% online education as well as endorsing a blended learning approach by supplementing face-to-face classes;
4. Simple, lightweight, efficient, flexible, scalable and highly compatible;
5. The software is open source. This means no licensing costs or vendor lock-in. Therefore lowering the total cost of ownership and enabling your organisation to invest resources to ensure a successful deployment.

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