Image of Black Mountain from one of the Hague Islands.
Interesting to note the pastoral lands depicted by Durand are gone. Continue reading
It was great to have help clearing out the mint.
The Arugula seems to have recovered it’s transplanting as the rains passed over. and it has been joined by many little radish sprouts!
boulder, boulder canyon, chopters, clouds, Colorado, fall, flatirons, flower, granite, helicopter, Leaf, leaves, lenticular, light, moon, red, rock, rose, sandstone, spinning, star house, sunrsie, water, wein
Some more of the beauty experienced around Boulder some weeks ago. Granite rock, falling leaves and helicopters, the dawn breaking over leaves and red rock, roses, clouds, and more. check out the gallery Continue reading
Heading up to the gorge one morning the hazy air made for some great skies.
I’ll have to post a little collection of halo images soon if the haze keeps up =)
Went to a star party in the gorge last night and got to gaze at the stars through astronomers telescopes. The Rose City Astronomers is a portland group affiliated with OMSI that holds monthly lectures and frequent star parties to go enjoy the stars and share knowledge. Some friends and I got together and headed up the gorge to rooster rock to partake. The location is somewhat removed from city glow, but the wester sky is still muddy, and washugal/camas lights can also be seen. There were a good 2 dozen telescope out, and binoculars and cameras too. Continue reading
Been a while since I got to just go walk with my camera and take pictures. I’ve always been doing something else at the same time, or rushing or had time limits, or gone out too late. at least for a while now. but house sitting gives one some extra time and a break from routine. so here is what I saw at the landing that evening.
I’d like to scout for a moonrise spot. But I think I missed this month’s moon.
Portland has a river running through it, called the Willamette, which comes from the south. My work is down south just off the bank, outside a wetland called Oak’s Bottom. I would ride my bike down the Willamette – following the spring water trail – into oaks bottom, and then through it to Trackers Earth. After work I would often be exhausted and ready to take a shower and chill at home, but some days I went for a walk – to sit at the river bank, or explore some of the other footpaths in Oak’s Bottom. This one day I walked the main trail over to the lake. And got a few pictures. A hint of the purple flower explosion that occurred here some weeks before is in the one image, sorry i missed the main event. Never the less, enjoy.
Always spectacular to watch the magical billowing revealed by the schlieren imaging technique. As in the last investigation the images below are of dense cold water descending from an ice cube in room temperature water. While we dont normally see this magical cascade of water within water the schlieren imaging technique allows this ‘invisible’ phenomena to be seen. Schlieren uses a set of mirrors to control the light and make the invisible visible. Differences in water temperature/density cause the light to bend and dissrupt a uniform color gradient, which allows the intricate patterns to be photographed.
This is a followup to the last investigation. This time I used some small circular plates of ice, and some larger ones (you can see one held in the field of view). The field of view is approximately 4″ in diameter for these images.
The magic revealed by Schlieren! these images use a set of mirrors to make the invisible visible. Differences in water density cause light to bend and allow the intricate patterns to be photographed. This setup uses a large sheet of ice which creates plumes of less dense cold water that billow downwards.
These are the first picks…and a video!
an investigation of vortex shedding – dye injected into boundry layer of a cylinder.
vanKarman Vortex streets and other cool vorticity effects
These are the first picks…