Posts

August 16, 2014

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4:00 AM | ALMA and the Brazilian Community Workshop
The new ALMA observatory opens up the possibility to observe many different types of astronomical objects at millimeter and submillimeter wavelengths with an unprecedented sensitivity and angular resolution. ALMA is planned to reach its full capacity in terms of sensitivity in early 2015. The angular resolution will continue to be increased until the longest baselines […]
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2:12 AM | Proving A Rotation Matrix Is What It Purports to Be: EM II Notes 2014_08_15
Summary:  The one that took four days.  A detector that worked finally arrived for the experiment, so work on EM II has been somewhat slower.  Also, the example here uses a lot of material from prior examples and requires being on your toes.  This example is all about showing that a rather abstruse looking rotation matrix is in fact a rotation matrix.  It involves recognizing dot and cross products when they're written in tensor index notation and having rock solid […]

August 15, 2014

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10:59 PM | Ask Ethan #50: Why didn’t the Universe become a black hole?
With all the matter-and-energy so close together and so dense at the moment of the Big Bang, why didn’t it recollapse?Continue reading on Medium »
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6:00 PM | How Quantum Mechanics Helps Us Breathe
New insights explain how respiration does not result in asphyxiation. Image credit: Antonio Guillem via shutterstockRights information: http://shutr.bz/1kivwqcWhy don't we suffocate whenever we try to take a breath? An international team of scientists has used quantum mechanics – the science that usually deals with events at the level of the ultra-small – to solve this human-sized mystery.Quantum mechanics has long proved its value in understanding such phenomena as the behavior […]
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2:50 PM | Bigger Government Makes for More Satisfied People
People living in countries with governments that spend more on […]
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2:09 PM | Satellite mystery solved!
Couple of days ago I wrote a post about mysterious satellite triplet, that I observed while trying to cathc a perseid meteors with my camera. I posted a mail about this satellite to the Seesat -e-mail list, and with the help of Leo Barhorst, Cees Bassa and Björn Gimle I was able to identify this! […]
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2:00 PM | Stories of the past as promises of the future
Author:. Robert Bud is an historian of science, technology and medicine. Also the Principal Curator of Medicine at the Science Museum, he has worked at […] Read more The post Stories of the past as promises of the future appeared first on Mapping Ignorance. Related posts:Flexible needles as the future for cancer treatment Cellulose conversion to starch, a promising strategy for future global food demand Epistemology in the courts. Or, Sherlock Holmes is dead, long live to Thomas […]
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12:49 PM | Nanotechnology law and guidelines in Europe
The book is a concise guideline to different issues of nanotechnology in the European legislation.
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12:28 PM | Laser makes atomic force microscopes way cooler
Cooling a nanowire probe with a laser could lead to substantial improvements in the sensitivity of atomic force probe microscopes.
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12:23 PM | Combined nanoscopy technique for studying cellular structures
Scientists develop a combined technique for studying cellular structures via high-resolution imaging.
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11:27 AM | Experts nearly perfect in determining truth in interrogations using active question methods
Non-experts have high rates of success of lie detection when […]
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11:25 AM | Scientific misconduct: Calculating the personal, public costs
Much has been assumed about the private and public damage […]
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11:24 AM | Acoustic Beams Hold Promise for Imaging, Cloaking, Levitation
There’s a new wave of sound on the horizon carrying […]
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11:22 AM | Still a Lot to Learn About India’s Deadly Air Pollution
What exactly is the relationship between exposure to air pollution […]
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11:20 AM | Excessive Running or Walking May Eliminate Health Gains in Heart Attack Survivors
Heart attack survivors who exceed 30 miles of running per […]
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11:12 AM | Scientists use lasers to control mouse brain switchboard
Ever wonder why it’s hard to focus after a bad […]
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11:09 AM | Science of origin stories of Captain America and the Incredible Hulk
In the colorful pages of comic books, a swig of […]
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11:06 AM | Correlated novelties: How one thing leads to another
“One thing led to another,” people often say. Events, discoveries […]
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11:05 AM | New tool makes a single picture worth a thousand – and more – images
A photo is worth a thousand words, but what if […]
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11:03 AM | Study helps prevent rhino deaths during relocation
Wildlife experts lose one to two black rhinoceros each year […]
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9:42 AM | Perplexed by Pauli
A rather pervasive meme claiming that nothing ever really touches anything else has been circulating on the internet for a number of years. I think, although I’m not entirely certain, that it may well have its origins in an explanation by a certain Michio Kaku. This type of explanation later formed the basis of a […] The post Perplexed by Pauli appeared first on physicsfocus.org.
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9:07 AM | FDA warns of fraudulent Ebola drug claims
The U.S. Food and Drug Administration is advising consumers to be aware of products sold online claiming to prevent or treat the Ebola virus.
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8:56 AM | Complex photonic nanostructures of an ultra-white beetle
The physical properties of the ultra-white scales on certain species of beetle could be used to make whiter paper, plastics and paints, while using far less material than is used in current manufacturing methods.
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8:18 AM | Direct and label-free discrimination of cytosine and its modifications utilizing silver ions in nanopores
Cytosine (C) modifications such as 5-methylcytosine (mC) and 5-hydroxymethylcytosine (hmC) are important epigenetic markers associated with gene expression and tumorigenesis. However, bisulfite conversion, the gold standard methodology for mC mapping, can not distinguish mC and hmC bases. Recent studies have demonstrated hmC detection via peptide recognizing, enzymes, fluorescence and hmC-specific antibodies - nevertheless, a method for directly discriminating C, mC and hmC bases without […]
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7:12 AM | Polar blue phases
arXiv:1405.5584v1 With the twist-bend nematic phase firmly established experimentally within the last few years, Shamid and colleagues [1] now investigate whether analogous phases are possible which instead have 2D or 3D modulated structures. After all, the theory of the twist-bend modulated structure by Dozov, for example, considered 1D modulations largely as a simplifying assumption. Motivated by an analogy between chirality and polarity, Shamid and colleagues reason that just as chirality […]
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7:09 AM | Heliconical cholesterics
Phys. Rev. Lett 112, 217801 (2014) The theory of the structural modifications of chiral nematics due to an applied electric or magnetic field was established to a large extent almost 50 years ago in two key papers by de Gennes and Meyer. Although the main elements of the theory have been extensively observed experimentally, Xiang and colleagues point out that one prediction—the field-induced ‘heliconical’ state—has remained elusive. That is, until now. Xiang and […]
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7:07 AM | Switchable grippers
Agnew. Chem. 126, 4630 (2014) Liu and colleagues have used the light-induced change in a liquid crystalline polymer system to produce surfaces with optically-switchable friction [1]. A chiral nematic polymer film which incorporated azobenzene was prepared in the fingerprint texture; upon exposure to ultraviolet light, regions where the director was parallel to the surface formed protrusions whereas regions where the director was perpendicular to the surface formed wells. In this way, the […]
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6:38 AM | Thin films reveal hidden potential
Thin films of oxide materials reveal topological electronic properties hidden in the three-dimensional form.
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6:33 AM | Molecular engineers record an electron's quantum mechanical behavior
Researchers have developed a technique to record the quantum mechanical behavior of an individual electron contained within a nanoscale defect in diamond. Their technique uses ultrafast pulses of laser light, both to control the defect?s entire quantum state and observe how that single electron state changes over time.
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4:00 AM | Le basi quantistiche in un universo classico
In occasione dell’anniversario della nascita del grande fisico e matematico austriaco Erwin Schrödinger, si è svolto in questi giorni presso l’IBM Watson Research Center, Yorktown Heights (New York) un interessante convegno che ha visto la partecipazione di alcuni fisici teorici di fama mondiale. Gli argomenti sono stati centrati attorno alle eventuali correlazioni tra le funzioni d’onda e […]
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