New algorithm exploits community structure of the web.
The web has spontaneously organized itself into communities. A new search algorithm that pinpoints these could help surfers find what they want and avoid offensive content.
Page builders can link anywhere. But they dont, Gary Flake, of the NEC Research Institute in Princeton, and his colleagues have found. Instead, pages congregate into social groups that focus most of their attention on each other.
Web dir
Early humans came out of Africa again and again.
There were at least three major waves of early human migration out of Africa, our DNA suggests. Apparently the wanderers made love, not war: gene patterns hint that later emigrants bred with residents.
Human origins are contentious. Most researchers agree that there have been several major migrations out of Africa. Some hold that human populations in many regions evolved in parallel after Homo erectus left Africa around two mi
Gloves are coming off in ancient bacteria bust-up.
A claim to have found evidence of the oldest living things on Earth is being fiercely contested. The argument looks set to run and run, and no one may win, but it may lead to a better understanding of the origins of life on our planet.
The debate is academic, but its implications are not. The ’fossil bacteria’ in question are around 3.5 billion years old. That’s roughly one billion years older than the only confirmed fossil
Scientists at Umeå University in Sweden are putting forward an entirely new picture of climate change and the first immigration of trees following the last Ice Age. Research shows that 8,000-14,000 years ago the climate was considerably warmer than was previously thought. When it was at its warmest 9,000-10,000 years ago, the timberline was 500 m higher than today, and leafy trees grew in the mountains. The spruce immigrated considerably earlier that was assumed until now, and it probably came from t
Neue Materialien mit nichtlinearen optischen Eigenschaften
Fensterscheiben und Brillengläser, die sich bei zunehmender Helligkeit dunkler färben, sind besonders im Sommer eine feine Sache. Optische Eigenschaften, die sich mit der Lichtstärke verändern, so genannte nichtlineare optische Eigenschaften, sind ihr Geheimnis. Auch als optoelektronische Bauteile sind derartige Materialien von Interesse. Voraussetzung für die besonderen optischen Eigenschaften ist eine sehr regelmäßigen Mikrostruktu
A new spin-out from Oxford University, Spinox, is aiming to devise novel ways to copy spiders` ability to spin silks. The new silks may be used for sutures or woven material for surgical implants, protective clothing and in sports equipment.
Spinox has been set up to fully develop a spinning process to create high performance fibres from natural or artificial proteins based on the principles used by spiders and insects to create natural silk fibres. This approach – biomimetic (mimicking biology)
Although Mars is currently a cold, dry planet, geological evidence suggests that liquid water existed there around 3 to 4 billion years ago. Where there is water, there is usually…
A new paper unravels the mysteries of a bizarre physical state known as the pseudogap, which has close ties to the sought-after state called high-temperature superconductivity, in which electrical resistance…
Researchers from Delft University of Technology in The Netherlands have been able to initiate a controlled movement in the very heart of an atom. They caused the atomic nucleus to…
5-formylcytosine activates genes in the embryonic development of vertebrates. The team of Professor Christof Niehrs at the Institute of Molecular Biology (IMB) in Mainz, Germany, has discovered that a DNA…
Research led by the Institute for Bioengineering of Catalonia (IBEC) has studied the migratory movement of groups of cells using light control. In processes such as embryonic development, wound healing…
Brigham researchers develop strategy to improve immunotherapy by helping T cells penetrate and kill tumor cells. Fighting cancer is exhausting for T cells. Hostile tumor microenvironments can drain their mitochondrial…
… that can harvest energy at room temperature. Researchers have succeeded in developing a framework for organic thermoelectric power generation from ambient temperature and without a temperature gradient. Researchers have…
The global use of lithium-ion batteries has doubled in just the past four years, generating alarming amounts of battery waste containing many hazardous substances. The need for effective recycling methods…
A new study led by researchers at the University of Minnesota Twin Cities is providing new insights into how next-generation electronics, including memory components in computers, breakdown or degrade over…
… shape-shift into versatile robots. Scientists at MPI-IS have developed electrically driven robotic components, called HEXEL modules, which can snap together into high-speed reconfigurable robots. Magnets embedded along the outside…
The AQT quantum computer, featuring 20 qubits based on trapped-ion technology, is now operational at LRZ’s Quantum Integration Centre (QIC), making it the first of its kind in a computing…
The CHAI joint project aims to optimize corrosion management in ports and waterways. The federal state of Schleswig-Holstein is funding the CHAI research project with a total of 900,000 euros….