Zuid-Afrika Informatie Zoeken

De beste SAASTA-foto's 2009

SAASTA is het South African Agency for Science and Technology Advancement. Het doel van SAATSA is samengevat in de Afrikaanstalige omschrijving: ‘die Suid-Afrikaanse Agentskap vir Wetenskaplike en Tegnologiese Vooruitgang'. Eén van de vele manieren waarop SAATSA streeft naar meer wetenschappelijke en technologische betrokkenheid van de Zuid-Afrikanen is de jaarlijkse fotowedstrijd "Southern African Science Lens". Zoals de naam doet vermoeden mag elke foto het resultaat zijn van wetenschappelijke en/of technologische ingrepen, maar moet het eindresultaat tonen wat de lens van het fototoestel gezien heeft. De SAATSA 2009 foto-wedstrijd Zuid-Afrika is een reeks van prachtige foto's waarvan sommige eerder gemaakt lijken te zijn door een artiest of een computer. De algemene winnaar kreeg een Canon EOS1000D met lenskit 18-55mm. De winnaar van elke categorie kreeg 10.000 Rand (905 Euro), en de twee runners up van elke categorie 2.500 Rand (226 euro). Om twijfel over de vertaling van de begeleide commentaar te vermijden vermelden we telkens de oorspronkelijke titel en de Engelse uitleg van SAATSA of van de fotograaf.


2009-winnaar, algemeen:

SAATSA - winnaar 2009

Fotograaf: Camilla Floros

Titel: Coral polyp mouth (koraalmond)

Beschrijving: This is a macro shot showing the mouth of a coral polyp surrounded by tentacles. Corals are actually animals and not plants as many people think. They have tiny algae cells that live in their tissue. These algae cells are called zooxanthellae and provide the corals with nutrients. Corals also feed via their tentacles, which have stinging cells that are lethal to tiny prey. Despite the tiny size of individual corals, they are the building blocks of coral reefs and are responsible for building the largest living structure on earth, the Great Barrier Reef. Corals are under threat due to global climate change. This coral is one of many that are being grown in a research aquarium. The aim is to cultivate corals in aquaria to reduce the pressure of collecting colonies from the wild and disturbing the coral reefs.


Categorie 1: Wetenschappen in Actie: winnaar:

SAATSA actie - nr 1

Fotograaf: Kim van Zyl

Titel: Lightning over Cape Town (bliksem in Kaapstad)

Beschrijving: This was taken during a rare thunderstorm over Cape Town just before sunrise on 21st May 2009. It shows the intricate pattern of the lightning strike as it releases huge amounts of energy. The average peak power output of a single lightning stroke is about a terawatt (1012W) and the stroke lasts for about 30 microseconds. Lightning rapidly heats the air in its immediate vicinity to around 20.000 degrees C - about three times the temperature of the surface of the sun. This compresses the surrounding clear air and creates a supersonic shock wave which decays to an acoustic wave that is heard as thunder.


Categorie 1: Wetenschappen in Actie: 2de prijs:

SAATSA - actie - nr 2

Fotograaf: Kim Kim van Zyl

Titel: Water column (waterkolom)

Beschrijving: This shows what happens after a drop of water has fallen into a bowl of water. The resulting rising column of water is caused by the rushing back to fill the void created by the displacement of the falling drop. This upper portion of this column sometimes creates a secondary drop that repeats the process, but to a lesser extent.


Categorie 1: Wetenschappen in Actie: 3de prijs:

SAATSA - Actie - nr 3
Fotograaf: Stephen Libera

Titel: Drawing beneath the stars (tekenen onder de sterren)

Beschrijving: The use of a longer shutter speed allows time for the camera to catch the light dispersed from a LED torch used to trace the people, while a lower aperture gives clarity to the LED light; above in the sky the Southern Cross can be clearly seen.


Categorie 2: Wetenschappen Close-up: winnaar:

SAATSA - Close-up - nr 1
Fotograaf: Camilla Floros

Titel: Coral polyp mouth (koraalmond)

Beschrijving: This is a macro shot showing the mouth of a coral polyp surrounded by tentacles. Corals are actually animals and not plants as many people think. They have tiny algae cells that live in their tissue. These algae cells are called zooxanthellae and provide the corals with nutrients. Corals also feed via their tentacles, which have stinging cells that are lethal to tiny prey. Despite the tiny size of individual corals, they are the building blocks of coral reefs and are responsible for building the largest living structure on earth, the Great Barrier Reef. Corals are under threat due to global climate change. This coral is one of many that are being grown in a research aquarium. The aim is to cultivate corals in aquaria to reduce the pressure of collecting colonies from the wild and disturbing the coral reefs.


Categorie 2 : Wetenschappen Close-up : 2de prijs:

SAATSA - close-up - nr 2
Fotograaf: John Hobson

Titel: Huntsman (jager)

Beschrijving: This image was taken as part of B-Tech in photography in which I was exploring means of creating aesthetic image using either scientific subject matter and/or scientific techniques. In this case I used photomicrography to photograph the forelegs of the African Huntsman Spider. The subject is the discarded husk of the spider not living specimen. The color in the image is due to using stressed plastic as a slide, instead of glass, and polarizing the light in the microscope.


Categorie 2 : Wetenschappen Close-up : 3de prijs:

SAATSA - close-up - nr 3
Fotograaf: Nicolas Santrucek

Titel: Hydrophytic leaf (blad van waterplant)

Beschrijving: The image shows a close-up shot of a hydrophytic leaf. It was taken through a microscope at 200x magnification. A hydrophytic plant is a plant which grows partly or wholly in water. This is about 2mm in length.


Categorie 3 : Wetenschap als Kunst : winnaar:

SAATSA - kunst - nr 1
Fotograaf: Kim van Zyl

Titel: Nature's Crystal (kristal van de natuur)

Beschrijving: The image shows water drops that have formed on a grass seed after a heavy mist. It shows the refractive properties of a convex "lens" that is formed by the drops of water. The magnifying effect can also clearly be seen in the way that the grass seed filaments have been "enlarged".


Categorie 3 : Wetenschap als Kunst : 2de prijs:

SAATSA - kunst - nr 2
Fotograaf: Prof Alvaro Viljoen

Titel: Hoodia Star (Hoodia ster)

Beschrijving: In the past few years there has been increased commercial interest in the Hoodia plant indigenous to South Africa and used as an appetite suppressant. The live plant is really not photogenic...then I received a sample for research purposes from Namibia. I was struck by the intricate shapes and texture of the dried stem in cross-section and this made me realize there is always something beautiful to see (find) in nature.

 


Categorie 3 : Wetenschap als Kunst : 3de prijs:

SAATSA - kunst - nr 3
Fotograaf: Oleg Toumilovitch

Titel: Dynamic light 2 (dynamisch licht 2)

Beschrijving: The image shows an optical effect, produced by two laser beams - red and green. Two laser beams are combined, so they exit an optical system as a yellow beam (as seen in the centre). The combined beam passes through two diffractive optical components (with identical pattern-dots in this case) rotating in opposite directions. The light is refracted by these optical components, but at different angles due to different wavelengths of green and red light, causing a difference in the distance between the dots for both lasers.

 


Categorie 4: Ik Zie Wetenschappen en Technologie: winnaar:

SAATSA - I see ... - nr 1
Fotograaf: Mischa Durrant - Pretoria High School for Girls

Titel: Inspiration (inspiratie)

Beschrijving: I took this picture in my room using a blank piece of A4 paper, bubbles, pipe cleaners, a bedroom lamp with the light falling on the blank paper. I shaped the pipe cleaner into scientific symbols. I blew bubbles towards paper and took a photo with my phone, the flash was on and I used a negative setting.


Categorie 4: Ik Zie Wetenschappen en Technologie: 2de prijs:

SAATSA - I see ... nr 2
Fotograaf: Anita de Jager

Titel: Phases matter (fases zijn belangrijk)

Beschrijving: The three phases are illustrated: Liquid, ice and gas bubbles are visible in this image of ice cubes with Coke in a glass.


Categorie 4: Ik Zie Wetenschappen en Technologie: 3de prijs:

SAATSA - I see ... nr 3
Fotograaf: Shinea Swartz

Titel: Gautrain construction site (constructie van de Gauteng-trein)

Beschrijving: The Gautrain is one of the most prominent landmarks in Gauteng at the moment. The technology being used to build the Gautrain has been imported from around the world and has been overseen by engineers experienced in high speed trains. We are fortunate enough to watch the progression of this train.


Categorie 5 : Wetenschappen en Sport: geen winnaar. Eerste eervolle vermelding:

SAATSA - sport 1
Fotograaf: Tamryn Swanepoel

Titel: Motion (beweging)

Beschrijving: This image has captured motion. Motion in physics means the change in location of the body. Change in motion is the result of applied force. An object's momentum is directly related to the objects mass and velocity. A body which is motionless relative to a given reference frame, moves relative to infinitely many other frames. Thus everything in the universe is moving.


Categorie 5 : Wetenschappen en Sport: geen winnaar. Tweede eervolle vermelding:

SAATSA - sport 2
Fotograaf: Alan Bucke

Titel: Ski (ski)

Beschrijving: There is so much science engulfed in any simple sport. This image portrays a graphical sketch over a picture of some of some of the influences surrounding a simple manoeuvre of skiing down a slope. The variables of speed and position are taken into account with this image.


Speciale Trofee voor promotie van Wetenschappen:

SAATSA - Promotie - 1
Fotograaf: Hannes Pieterse

Titel: Eish, the tension! (de spanning!)

Beschrijving: This physics experiment shows how surface tension in soapy water works. The force acts to keep all of those water and soap molecules together and you can push a wet finger through the frame with the soapy film. A dry finger (or rose, or needle) will push those soap and water molecules away from each other but ... a wet finger is covered in the same kind of water and soap molecules so they just become a part of the network. The bubble in now shaped mostly like a dome and partly like a finger!


7 december 2009