background preloader

International Dark-Sky Association

International Dark-Sky Association

http://darksky.org/

Related:  2019 Avril

Ancient human bone reveals when we bred with Neanderthals When a human bone was found on a gravelly riverbank by a bone-carver who was searching for mammoth ivory, little did he know it would provide the oldest modern-human genome yet sequenced. The anatomically modern male thigh-bone, found near the town of Ust’-Ishim in south-western Siberia, has been radiocarbon-dated to around 45,000 years old. This was an interesting time in human prehistory. Although within the most-recent ice age, it was a relatively warm period, sometimes proposed as the point at which modern humans entered Europe. It is also when the artefacts left by many modern humans start to develop from tools similar to those used by older human species to more sophisticated ones. At the same time, we see appearance of evidence for fishing, trade, music and art.

Magnifying the Universe Embed this infographic on your site! <iframe width="500" height="323" scrolling="no" src=" frameborder="0" allowfullscreen></iframe><br />Copyright 2012. <a href=" the Universe</a> by <a href=" Sleuth</a>. The above is an interactive infographic. We have also developed a complimentary poster that you can view here: Sizes of the Universe poster. If you're technically inclined, here's a look at the references we used to construct these infographics: Facts About The Universe.

2012 Perseids meteor shower viewing times and information In 2015, the peak of the Perseids meteor shower will occur around the time of a New Moon. This will produce favorable viewing circumstances for observers expecting to get the full effect of this yearly summer experience. With upwards of 80 meteors per hour predicted, it should well be worth staying out to catch quite a few impressive bursts of light streaking through the night sky. On average, under completely clear skies, and in complete darkness, observers may witness 50 to 80 meteors per hour; but these rates can exceed up to 120 meteors per hour in rural locations. Be aware that local conditions such as light pollution, cloud cover, and precipitation will also play a major role in the number of meteors you are likely to see. For the best viewing experience, find an area unobstructed by a structure that is far away from city lights.

Large-scale recent expansion of European patrilineages shown by population resequencing Samples DNA donors were recruited with informed consent (University of Leicester Research Ethics Committee reference: maj4-cb66). DNA was extracted from various sources including lymphoblastoid cell lines, peripheral blood and saliva. Samples (340) were included in the design from 17 populations (20 males each) across Europe and the Near East. Samples from Greece, Serbia, Hungary, Germany (Bavaria), Spanish Basque country, central Spain, Netherlands (Frisia), Denmark, Norway, Finland (Saami), England38 (Herefordshire and Worcestershire), Orkney38, Ireland and Turkey were collected by the authors. Twenty random Palestinian male samples were purchased from the National Laboratory for the Genetics of Israeli Populations ( www.tau.ac.il/medicine/NLGIP).

External Drive Not Recognized? This Is How You Fix It in Windows Removable disk drives—either USB flash drives or external hard drives—should be easy to use. But in some cases, you may connect your drive to a Windows PC or another device with a USB port and find the external hard drive isn’t showing up. Advertisement This problem has several possible causes: partition issues on the external drive, using the wrong file system, dead USB ports, or driver issues in Windows. In a worst-case scenario, the drive itself may be dead.

Amazing Vertical Panoramas of Church Ceilings Around the World In 2012, photographer Richard Silver started photographing the ceilings of churches in New York City. After some experimenting, Silver discovered that he could stitch 6-10 photos in Photoshop, creating a panorama. However, instead of going from left to right, Silver’s panoramas went from top to bottom. These ‘vertical panoramas’ turned into an ongoing photo series and Silver has been capturing church ceilings around the world ever since. Below you will find a small selection of Silver’s vertical church ceiling panoramas. You can find many more on his Behance page where you can also check out his other fantastic travel photography.

Neural Style Transfer for Matte Painting and Fractal Art — Julius Horsthuis You might wonder what I used as style images in above examples. For some, I used multiple and blended them, but basically I don't have the copyright, so can't publish. Just do a Google image search for 'Nature' or 'City' - that kind of stuff. I also used the technique that I talked about in my last blog post - a Google Similar Image search on the fractal source image. Deep Learning & Art: Neural Style Transfer – An Implementation with Tensorflow (using Transfer Learning with a Pre-trained VGG-19 Network) in Python This problem appeared as an assignment in the online coursera course Convolution Neural Networks by Prof Andrew Ng, (deeplearing.ai). The description of the problem is taken straightway from the assignment. Neural Style Transfer algorithm was created by Gatys et al. (2015) , the paper can be found here .

Tensorflow Implementation Note: Installing Tensorflow and Keras on Windows - Chun’s Machine Learning Page Hello everyone, it’s been a long long while, hasn’t it? I was busy fulfilling my job and literally kept away from my blog. But hey, if this takes any longer then there will be a big chance that I don’t feel like writing anymore, I suppose. So it might not be a bad idea to just make some simple posts (some kind of implementation note like the one I’m writing right now), until life becomes easier, right? That’s enough talking. Let’s get down to business.

Related: