Archive for December, 2010

Art in Oceania

The visual art and architecture of native Oceania, includes media such as sculpture, pottery, rock art, masks and personal decoration. In these societies, art and architecture have usually been closely connected, for example, storehouses and meetinghouses have been decorated with beautiful carvings, and so they are presented together in this discussion.

Up until the 16th and 17th centuries when European societies appeared upon the scene, Oceanic societies maintained several forms of Neolithic technology. The only exception was in the northwest of New Guinea, where the people living around Geelvink Bay (Teluk Cenderawasih) imported very small quantities of metal from the Indonesians of the Moluccas (Maluku). The technique of forging was jealously guarded, like a cult secret; some tools were traded but only in quantities too small to have made much impact on usual working conditions.

Throughout the rest of Melanesia and in Polynesia and Micronesia, the basic tool remained the stone blade, which was hewed as an adze or an axe, and sometimes interchangeably as both. Tridacna shell was at times used as blades in the parts of Oceania where stone was in short supply, including Micronesia and the Solomon Islands. When obsidian became available, it was chipped into blades for use as both weapons and tools. Other suitable materials included bamboo and bivalve shells, which take extremely sharp edges. Some fine cutting and engraving was done with unhafted boar tusks or with hafted shark and rodent teeth. Animal bones served as gouges, awls, and needles. All these tools were employed in working wood, which with very rare exceptions was the main medium used throughout Oceania.

Clay was also employed, in the main for sculptures, for some small musical instruments (whistles), and for pottery in Melanesia and New Guinea. The creating of clay vessels was nearly exclusively women’s work, apart from in a few small areas in New Guinea and the northern Solomons. A typical method involved spiral coiling of rolls of clay. The decorating of the pot was the work of men.

Some working of shell and turtle shell was done with simple drilling and abrading equipment. The carving of stone, although obviously presenting far more arduous and time-consuming problems than wood, was used remarkably often and occurred throughout the Pacific Islands; hammering, pecking, and polishing were the main methods. Even such a hard a material as greenstone was mastered by grinding with abrasives.

Paint and painting were thought to animate sculpture, sometimes literally, in religiosymbolic terms, as paint was considered to have magical, vivifying powers. Paints were usually ochres, with other vegetable-derived pigments. Water was the typical medium, occasionally added to with sap. Brushes were made from the fibrous ends of chewed or frayed sticks, small feather bundles, pieces of wood, and sometimes the most basic applicator of all, the finger. Apart from sculpture, the surfaces used for painting were rock faces, bark, and tapa (cloth made from pounded bark). Rock painting was most common in Australia, where panels of bark were also used. In Melanesia, paintings were made mainly on sago-palm leaves and sheets of tapa cloth. In Polynesia the women manufactured great quantities of tapa, which were then decorated with traditional designs using vegetable dyes. The techniques they used included painting, stenciling with leaf templates, rubbing over relief-design tables, stamping, and printing with carved bamboo rollers.

The only areas where weaving was practiced were the Caroline Islands, the Polynesian outliers east of the Solomon Islands, some of the Santa Cruz Islands, parts of Vanuatu, the Saint Matthias Group (northwest of New Ireland), and a few places on the northern coast of Irian Jaya. Spinning was unknown; instead of yarn or thread, strips of banana fibre were used on a simple backstrap loom. Weaving was a woman’s craft in the Caroline and Saint Matthias islands but was employed by men elsewhere. A form of “finger weaving,” as in net making, was used by Maori women in creating textiles from flax fibres.

The architecture of the Pacific Islands was varied and sometimes large in scale. Buildings reflected the structure and preoccupations of the societies that constructed them, with a great deal of symbolic detail. Technically, most buildings in Oceania were no more than simple assemblages of poles held together with cane lashings; only in the Caroline Islands were complex methods of joining and pegging known.

Oceanic artists’ quest for media was consummately opportunistic; they regarded almost anything from the lavish natural world that surrounded them as potentially usable. The marine world yielded shells of all kinds, particularly conus, cowrie, and nassa shells. Birds gave down, beaks, and plumes (those of the birds of paradise were particularly prized); animals provided teeth, tusks, and skins; insects supplied their brilliant wing cases. The vegetable kingdom was drawn upon for flowers, leaves, and fibres. The assembly of such materials into single objects was uncommon in Polynesia and Micronesia, but the practice was typical of Australian and Melanesian styles, and contributed brilliantly to their more spectacular effects. The most basic medium of all was the human body, which allowed for both removable and permanent decorations, including scarification, enhanced by treatment to raise keloid welts in New Guinea, and tattooing with needles and pigments elsewhere.

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How to get the most from your Grid-Connected Solar Power System

Ok, so you’ve just had your brand new grid-connected solar panels connected by your friendly accredited solar power installer.

Now, think back to the first meeting you had with the sales consultant at the kitchen table. Do you recall having a conversation about your previous energy use in the home, and what habits you should alter if you decided to get solar? If you answered yes, then you probably organised your solar quote through mysolarprice.com.au, as we only engage solar companies that we know will provide information to the consumer about their typical power use and give them a great understanding of what power output the system is capable of. Some ‘fly-by-night’ solar panel companies who have only recently arrived on the scene have misled the public regarding the performance capacity of their grid connected systems. This has led to some mistrust and confusion in the Solar arena. Mysolarprice.com.au knows of these companies, and will not deal with those solar installers found to be giving misleading information or involved in any dishonest sales tactics.

Have you forgotten these power saving tips the solar consultant gave you? If so, don’t worry, as we provide here the TOP 15 tips for reducing your power consumption to get the most out of your tariff feed, whether that be Net Tariff feed or Gross Tariff feed. Some homes with larger systems from 2kw (2 kilowatts) or more may not have to change their behaviour at all and will still be in positive territory, that is, able to get a surplus or credit for their power. This depends on the home, roof type, shade, number of people in the home, appliance usage, and most importantly their behaviour in the home or in other words how they interact with their home. Some people work during the day and turn their standby power off, whilst doing their washing and household chores at night time. Whereas some people have an air-conditioned home office and use a massive amount of power during the day and which does little at night. How does this make a difference you may ask? If you are in a state like Queensland which has a “Net Tariff Feed” this is extremely important. This basically means you get the balance of the power you send to the grid from the amount of power youuse during the day but not at night, as solar panels don’d generate power at night time. Therefore, if you are using a lot of power during daytime when your solar power system is working the hardest, you are competing or cancelling it out with the amount of power you are feeding back to the grid, or “Net” Feed. If however, you are away during the day and turn off all your appliances at the wall to eliminate inactive and active standby but only leave the essential items on like the fridge, you will be streets ahead of the rest and get more of a “net” balance which means one thing: more $$$$$$ in your pocket!

These top 15 energy saving tips range from modifying the building material of the building, to being more energy efficient, to minor behavioural modifications like turning off the lights when you leave the room. This list will be in the order of the simplest minor behaviour modifications to bigger structural changes to the building material.

TOP FIFTEEN POWER-REDUCING IDEAS

1.Turn the lights off when you leave a room. This is especially important if you have energy-guzzling old-fashioned incandescent lights or worse, halogen lights. I have seen people leave on 4 x tastic 500w heat lamps on in the bathroom all day. That’s an incredible 2KW or 2000 watts of power being consumed for no reason.

2.Let in natural light to the rooms. This will reduce the need for lights during the day.

3.Replace all incandescent light bulbs and halogens with CFL’s (Compact Fluorescent Lamps) or LED’s. They use only around a quarter or less power than the standard 75watt incandescent or 60watt halogen, and will last far longer than the standard incandescents or halogens.

4.Use Sensor CFL spotlights outside, instead of the old energy-inefficient spotlights of yesteryear.

5.Turn off all standby power. This is probably the best tip I can give you for reducing your daily electricity consumption. A typical dwelling generally operates at around 10-15% standby power, so if you have a quarterly bill of $400 that means $40-$60 of that account is standby power -which does nothing! It may not seem like much but that’s around $120-$240 a year just for not turning appliances off at the wall. An easy way to control your standby is to buy a proper standby power board.

6.Choose energy-efficient appliances. This doesn’t necessarily mean throwing out your 5-year-old fridge because it only has 2 stars, and spending $2,500 on one that is 4 star. It means if you are presented with an option of buying a new appliance, then make sure it has the highest star rating available. So if you have the money and the choice is over a 2 star 50 inch plasma TV or a 5 star 50 inch Led TV you should get the LED.

7.Turn off any second or third fridges not being used. I have found in energy audits that a lot of people have a spare chest freezer or 20-year-old rusting fridge with split seals in a hot basement. This will account for a great chunk of your electricity bill. Sometimes I’ll open the door and there’s nothing even in there, so the fridge is running -and working overtime- for no reason.

8.Turn off the computer screens and speakers when not being used. This is so easy, however most people I come across forget to do this. If you have a Sub-Woofer with a separate power supply be sure to turn that off also when not in use.

9.Draft Sealing in Winter. If you use electric heating in winter, then be sure to stop any drafts, otherwise you are definitely wasting money.

10.Use ceiling fans or pedestal fans instead of air-conditioning. Air-conditioning is one of the most expensive appliances to use in summer. If are going to use air-conditioning in summer, make sure that the room is tightly sealed, the windows are covered and you have insulation in the ceiling.

11.Air-Conditioning Tips for Summer.

- Buy the right sized air-conditioner for your room -not house, unless it’s ducted. If buying ducted make sure it can be zoned.
- Buy an energy efficient inverter air-conditioner with a high star rating for cooling and heating.
- Set the thermostat between 18-21 degrees. Every degree celsius higher that you set the a/c increases your consumption by 10%
- Re-circulate cool air from within instead of using hot air from outside. If the compressor is outside make sure its not sitting exposed in the western sun.
- Make sure the windows have both internal and external shading.

12.Air-Conditioning Tips for Winter.

- Set the thermostat to 23-26 degrees
- Wear warm clothes to insulate your body so you need less mechanical heating
- Insulate your space as with Air-Conditioning in Summer Tips.
- Because hot air rises, a ceiling fan can be turned to the lowest setting -in reverse- as this actually pushes the warm air down towards the house’s occupants
- Avoid electric radiator heaters and electric fan heaters as they are massively expensive.
You are better using reverse cycle air conditioning as it’s a great deal cheaper (most people don’t know this).

13.Insulation. Reflective foil type insulation is better in sub-tropical climates such as Brisbane receives, but thicker, bulky insulation such as wool/fibreglass or polyester is better suited to the more temperate climates such as Toowoomba.

14.Windows. There are plenty of things you can do to insulate your windows to stop the heat entering the house during summer, and keep it in in winter. In summer it’s important to keep direct sun rays off the east and west windows by vertical screening, and keep it off north facing windows with big eaves or horizontal shading. This is so you can allow the sun in in winter when it is lower in the sky. These are principles known as solar passive design.

15.Hot Water. If your home has an electric hot water system and it is on the wrong tariff this can be the bulk of your bill. Generally, your hot water should be on an off-peak tariff depending on your location and retail provider. A hot water bill is normally a quarter of your electricity bill if the system is electric. If it is a relatively new heat pump it will be much less. The most efficient water heating device is Solar Hot Water, with a natural gas boost.

These are just some of the generic energy-saving tips that I have come across while doing household energy audits which I find many people need help with. If you can reduce your daily consumption it’s going to make it a lot easier to:
1. Keep your bills down, and
2. Make it easier for the Solar Panels to work and provide you with a bonus or credit on your next bill.

One other thing I can also mention is panel care. Your panels should be kept free of dirt and grime, because even a small build-up of dust on the panels can drastically reduce the panel’s performance by up to 30% or more. I will look at the process of solar panel maintenance in my next article.

If you require any further energy saving tips or solar power saving tips, then Mysolarprice.com.au can help. We provide all the solar panel infomation necessary to make an informed solar purchasing decision.

Mysolarprice.com.au specialise in solar power brisbane solar hot water brisbane and solar pool heating brisbane

 

All About The New Red Laser Application For iPhones

The iPhone has a number of applications available for it and more are being made and added to the application store every day. Just about anybody can invent an application for the iPhone and place it in the app store; all that anyone is required to do is show the app to Apple for screening and approval.

One helpful application would be the red laser that comes available with the Apple iPhone. The red laser lets consumers to scan an item and readily see the available prices of that specific item online. Alongside the online comparison shopping that the barcode scanner provides, the red laser also has several other quite useful features. For instance, you can scan a dvd noticed while in a shopping mall and the red laser will find a copy of it online and will also provide for you to have the entire movie sent to your TiVo.

The red laser is also capable of adding items to your shopping list. For example, whenever anyone is about to throw away their toothpaste, they can scan the item and it will be added on the shopping list reminding them to purchase it next kitchen shopping trip.

One can use the red laser to scan almost anything and get information that is relevant to their interests. You can use it on a book and the red laser can locate a copy of it in a nearby library. It is capable of this due to its highly developed integration with the world’s biggest library catalogue -WorldCat. The red laser is also able to look for a copy of any book scanned and locate any online retailers which have it in stock.

Other than finding prices and locating products, the red laser will also let you to scan food. If someone is allergic to any ingredient, one can scan a food item and then tap on the allergen info. Instead of having to scan the whole list of ingredients in the packaging, red laser will show you a list of all the ingredients within the item and present the most common allergens within it. On top of all that, red laser will also help you eat in a healthier way by providing the full nutritive contents within the product.

Red Laser comes with several other useful features -you may be surprised at the number of products you can scan and find helpful information on. This is definitely an application worth getting.

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