Excellent nature photography

Wandering through the forums on photo.net, I came across the work of Wojciech Grzanka. His macro photography of insects is especially cool. Magnified insects look so other-worldly it is no suprise they have inspired to much science fiction and fantasy, ranging from the brilliant to the amusingly mediocre.

One of the best things about the photo.net community is the sheer level of skill and helpfulness among the community members. At the same time, the quality of other people’s images is almost certain to make you feel like a rank amateur.

PS. Grzanka’s website is pretty slick as well, though the images seem to be the same as those on photo.net.

Oxford B&W photo competition

I have been thinking about submitting a few images to the Intra Muros competition, but I am finding it hard to locate arty black and white shots of the right sort within my collection (1, 2). The general pattern of the ones they have accepted is that they show recognizable Oxford architecture, individual people are often included but never highlighted, and they have an abstracted quality to them. Somewhat surprisingly, most of my favourite photos taken in Oxford are in colour. Normally, I am a big fan of black & white.

The deadline isn’t until June 9th, so perhaps I can keep my eyes open for the right sort of image from now on. The winners get photos printed in their calendar and the best single entry wins £50.

What dread hand and what dread feet?

Oxford gardens

Tragically and unusually, someone in British Columbia was killed by a tiger this week. Apparently, the animal was privately owned and part of some sort of exotic zoo. The 32 year old woman was standing near the cage when a single paw strike severed her femoral artery. As a consequence, people have called for tougher laws on the ownership of such animals and the tiger has been killed.

The first measure seems entirely reasonable. It is well worth asking whether ownership of endangered and dangerous animals should be permitted. Certainly, the incident demonstrates that they are not always confined appropriately. Whether their welfare is being adequately maintained or not is another concern. According to the the Victoria Times-Colonist “the tigers were kept in small chain-link cages with no flooring.” It sounds as though the circumstances in which the animals were held were neither respectful, humane, nor intelligent. Apparently, the Society for the Prevention of Cruelty to Animals has tried several times since 2005 to have this tiger seized from its owner, on the basis of both safety and animal welfare. Paul Springate of the Rainforest Reptile Refuge has some intelligent comments on the failures in the current Canadian system for managing exotic animals. It seems intuitively obvious that if people are allowed to own such animals (itself a policy of dubious quality), there must be standards for keeping them and a system of inspections.

Putting the tiger to death, on the other hand, strikes me as highly inappropriate. It should come as no revelation to anybody that tigers are dangerous and that spending time at close quarters with one could imperil you. It is certainly a tragedy that this young woman’s life was cut short and it makes perfect sense to investigate the conditions that led to it and act upon them. Punishing a tiger simply for being a tiger, on the other hand, is an inappropriate extension of vengeance into a situation where it makes no sense to apply.

Five boxes left to tick

Along with revising, I am now working on my final paper for the M.Phil. As with the previous one on the environment, this is for the international law course with Vaughan Lowe and Adam Roberts. With that submitted by Friday, only exam preparation will remain.

The weather is doing its bit to aid the process along. Few people are out enjoying the spring greening of Oxford while there is so much rain coming down.

GPS and navigation

Oxford botanic gardens

I have been annoyed recently by full-page ads in which RIM is advertising the navigational capabilities of their new BlackBerries. They suggest that people can throw away maps and compasses and wholeheartedly embrace the combination of GPS and electronic maps.

I know firsthand how useful GPS can be. As an altimeter or a way of locating yourself in a featureless landscape, it cannot be beaten. Likewise, it is very helpful for quickly figuring out where you are when you are out on the water in a canoe or kayak. All the same, I think there is a fundamental value in being able to read a map, locate yourself on it, and work out a course to where you want to be. It isn’t enough to take a course in these things and forget about it. As with any complex skill, practice is important.

Some common sense is also a necessity, no matter how you are navigating. If your GPS-based automobile navigation system tells you to drive along train tracks, you should be aware that machines are fallible, and highly stupid as well. They have no common sense by which to evaluate whether, for instance, a bridge has been washed out or whether a linear course between A and B includes a series of lethal cliffs. There is also the small matter that some dead batteries a splash of water or a dropped piece of gear could knock out both your map and compass equivalent, if you are relying on a GPS system.

Related posts:

Circularity

Wet leaves

A night that one had no reason to expect to be abnormal has actually been highly interesting, though in entirely non-academic senses. I learned about how delicious Ketjap Manis is, a bit about Greenpeace, lots about a private Oxford company of interest, some things about friends of mine, and a bit about improvised cooking. The dish was invented in three stages, while being cooked, and worked out quite well.

In some ways, this last Oxford term is proving a lot like my first.

From Hubble to Webb

NASA has announced some more details on the James Webb telescope, slated to replace Hubble as the most important such instrument in orbit. Hubble is located in an elliptical low Earth orbit, with an orbital height of 589km and an orbital velocity of 7,500 m/s. The Webb will be located at Lagrange Point 2. This is an area where gravity will keep the telescope in a sun-earth line. As a result, the telescope will always be in the shadow of the Earth. NASA has a report on the transition.

Hubble has been one of NASAs great successes over the last 17 years, both in terms of the quality scientific information generated and in terms of the way the project reflects upon the organization. By finally offering an astronomical vantage point not affected by the Earth’s atmosphere, Hubble has been able to make unprecedented observations and discoveries. For example, consider the various exoplanets discovered in recent years, either because of how they obscure stars by passing in front of them or cause stars to wobble with their gravitational pull. Hubble was also ideally placed to observe the impact of Comet Shoemaker-Levy 9 into Jupiter. I remember watching the video feed from that at the Vancouver Planetarium, back in 1994. Some pretty stunning images of the universe have also been generated.

Just yesterday, Hubble may have observed a ring of dark matter. Given the disjoint between how galaxies behave gravitationally and the number and mass of stars we can observe, scientists have speculated that most of the material composition of the universe consists of dark matter and dark energy. The former has gravitational effects but does not interact with electromagnetic radiation. The latter is hypothetically involved in universal expansion: serving as one possible explanation for why the universe is expanding at an expanding rate, as observed through the Doppler shift. Data from the remainder of Hubble’s operational life and the full span of the Webb telescope’s operation may help with the refinement or rejection of both of these ideas, with coincidental improvement in our understanding about the contents and evolution of the universe.

Hubble has been discussed here before. A song about the Doppler shift has also been linked.

Odd bit of pharmacology

I learned an interesting fact at my second Wadham High Table dinner in as many days. Apparently, the antibiotic tetracycline binds aggressively with calcium. This is why you can’t drink milk when you are taking it, since the drug will bond to the milk and not enter your bloodstream. For the same reason, it builds up inside bones and teeth that are growing. If you examine a skeleton from a person who took tetracycline, the bones that were growing at the time can be made to fluoresce.

Because tetracycline turns brown when exposed to light, people who take these drugs while their teeth are still growing are likely to have them turn brown permanently.

An urban world

Downtown Vancouver

In recognition of how half the global population now lives in cities, this week’s issue of The Economist has a survey on urbanization. Much of it makes for fascinating reading. For instance, they allege that the Kibera slum in Nairobi exists more for reasons of corruption than of poverty. The provision of private services and the need for constant bribery make its continued existence profitable, just as the pool of cheap labour it provides plays an important economic role.

As always, they come up with some interesting statistics, as well. Vancouver is ranked as the most livable city in the world, and one is reminded that Tokyo has a larger population than all of Canada. Delhi has the world’s dirtiest air, as measured by particulates, followed by Cairo and Calcutta. More than 70% of all urban dwellers in sub-Saharran Africa live in slums. In Ethiopia, Malawi, and Uganda that figure is over 90%.

The United Nations envisions human population growth as a phenomenon that will eventually slow, leaving the world with a population of about eleven billion. By then, more than 60% of people will be living in cities, dependent upon agricultural productivity elsewhere to be able to sustain themselves. Hopefully, climate change and other ecological phenomena will not make that overly challenging.