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Light Pollution Is Getting Worse Every Year. That ’s Bad For Your Health
Nothing has captured the march of wealth and progress like any society’s ability to light up the night—first with campfires and torches, then with gas lamps, finally with incandescent lights. Franklin Roosevelt’s 1936 Rural Electrification Act was an effort both to bring modernity to the 90% of American farms that lacked electricity and to help jolt the American economy, which was still deep in the Depression. The modern nighttime image of the Korean peninsula as seen from space, with darkness north of the 38th parallel and brilliant light in the vibrant south, powerfully captures the connection between c...
Source: TIME.com: Top Science and Health Stories - November 22, 2017 Category: Consumer Health News Authors: Jeffrey Kluger Tags: Uncategorized Environment health illumination Light NASA nature NOAA onetime Science Sprawl Source Type: news

Water divining is bunk. So why do myths continue to trump science? | Philip Ball
The use of dowsing by major water companies shows that the appeal of natural magic needs to be understood – and, where needed, confrontedThe news that manywater companies use dowsing to locate underground water has prompted outraged demands from scientists that they desist at once from wasting time and money on “medieval witchcraft”. They are right to call this practice deluded. But it reveals how complicated the relationship is between scientific evidence and public belief.When thescience blogger Sally Le Page highlighted the issue after her parents spotted an engineer dowsing for Severn Trent Water, the...
Source: Guardian Unlimited Science - November 22, 2017 Category: Science Authors: Philip Ball Tags: Science Utilities Severn Trent Physics Business UK news Water bills Consumer affairs Source Type: news

Cold atoms in space could target gravitational waves
Atom interferometers could be more effective than light-based instruments (Source: PhysicsWeb News)
Source: PhysicsWeb News - November 22, 2017 Category: Physics Source Type: news

Congress Passes National Defense Authorization Act for Fiscal Year 2018
Congress has passed the National Defense Authorization Act, an annual bill that sets policy for the Department of Defense and the National Nuclear Security Administration. The final version incorporated or adapted many of the R&D-related proposals from the original House and Senate versions of the bill. (Source: FYI: The AIP Bulletin of Science Policy News)
Source: FYI: The AIP Bulletin of Science Policy News - November 21, 2017 Category: Physics Authors: wthomas Source Type: news

Porpoise ’s forehead acts like an acoustic metamaterial
Echolocation beam controlled with deformable tissue (Source: PhysicsWeb News)
Source: PhysicsWeb News - November 21, 2017 Category: Physics Source Type: news

Russian radiation leak: everything you need to know
‘Extremely high’ levels of a radioactive isotope were discovered in parts of Russia in September. But where did it come from? And is it dangerous?Russia reports radioactivity 986 times the norm after nuclear accident claimRussia ’s meteorological service has confirmed that “extremely high” concentrations of a radioactive isotope, ruthenium-106, were found in several parts of the country in late September. Ru-106 is a decay product from nuclear reactions: the initial fuel is typically uranium or plutonium, and this spl its into smaller nucleii, which decay through a series of different radioact...
Source: Guardian Unlimited Science - November 21, 2017 Category: Science Authors: Hannah Devlin Science correspondent Tags: Russia Nuclear power Nuclear waste Energy Environment Europe Science Physics Source Type: news

Quantum Circuits bags $18m in first-round financing
Flash Physics: need-to-know updates from the world of physics (Source: PhysicsWeb News)
Source: PhysicsWeb News - November 21, 2017 Category: Physics Source Type: news

Academy of Laser Dentistry Hosts Three Educational Sessions at GNYDM
Coral Springs, FL – November 15, 2017 – The Academy of Laser Dentistry (ALD) the only independent and unbiased non-profit association dedicated to improving patient care with the proper use of laser technology, will carry on its mission with three hands-on sessions during the upcoming Greater New York Dental Meeting.According to ALD president, Dr. Charles Hoopingarner, “I’m very excited to be co-presenting three valuable courses with my friend and colleague, Dr. Edward Kusek. As always, the ALD will provide hands on clinical training on many different lasers for both the new laser user as well ...
Source: Dental Technology Blog - November 20, 2017 Category: Dentistry Source Type: news

Scientists Predict 2018 Will Be a Bad Year for Earthquakes. Here ’s Why
There is no natural disaster sneakier than an earthquake. Hurricanes can be predicted and tracked weeks in advance, and even tornados, monsoons and blizzards at least have seasons. But earthquakes strike entirely without warning. Now, however, a new study suggests that we may want to brace for a surge of quakes in the year ahead, and the reason for the danger is an unlikely one: the rotation of the Earth has slowed slightly. While accurately forecasting earthquakes is impossible, a backward look through the seismic record allows geologists to detect some distinct patterns. In the new study — which was presented at th...
Source: TIME.com: Top Science and Health Stories - November 20, 2017 Category: Consumer Health News Authors: Jeffrey Kluger Tags: Uncategorized Earth's rotation earthquakes geology Physics Richter scale Science Source Type: news

PSU researchers design survey to tap students' motivation in STEM
(Portland State University) Researchers at Portland State University are learning more about undergraduates' experience in science, technology, engineering and math (STEM) classes and sharing a set of survey questions that will help researchers and educators at other universities do the same. This survey was developed by a team of researchers in PSU's STEM Equity and Education Institute with the help of instructors in chemistry, biology and physics. (Source: EurekAlert! - Biology)
Source: EurekAlert! - Biology - November 20, 2017 Category: Biology Source Type: news

Arecibo Observatory lives on, but with less money
Flash Physics: need-to-know updates from the world of physics (Source: PhysicsWeb News)
Source: PhysicsWeb News - November 18, 2017 Category: Physics Source Type: news

Science Committee Advances Bipartisan Research Infrastructure and STEM Education Bills
The House Science Committee has approved a package of bills that establish target funding profiles for eight Department of Energy research facility construction projects. The committee also approved four STEM education and research bills, one of which would require federal science agencies to annually report to the National Science Foundation information on the demographics of all R&D grant applicants. (Source: FYI: The AIP Bulletin of Science Policy News)
Source: FYI: The AIP Bulletin of Science Policy News - November 17, 2017 Category: Physics Authors: mambrose Source Type: news

NSF Creating Board to Oversee Research Facilities Throughout Their Lifecycles
The National Science Foundation plans to create a Facilities Governance Board that  will oversee the agency’s major research infrastructure projects at all stages of their lifecycle, from development through divestment. (Source: FYI: The AIP Bulletin of Science Policy News)
Source: FYI: The AIP Bulletin of Science Policy News - November 17, 2017 Category: Physics Authors: mambrose Source Type: news

Hope fades for axion-like dark matter
Flash Physics: need-to-know updates from the world of physics (Source: PhysicsWeb News)
Source: PhysicsWeb News - November 17, 2017 Category: Physics Source Type: news

Springer Nature launches a pilot with PaperHive
(Springer) Springer Nature has launched a one-year pilot with PaperHive, a market-leading annotation system and copyright-compliant collaborative research platform. The partnership focuses on increasing reader engagement of university students with academic literature in various fields including biomedicine, mathematics, physics, and chemistry. The pilot phase comprises books and textbooks from Springer and Springer Spektrum, the leading publisher for classical and digital educational media in the field of natural sciences and mathematics in the German-speaking region. (Source: EurekAlert! - Social and Behavioral Science)
Source: EurekAlert! - Social and Behavioral Science - November 17, 2017 Category: International Medicine & Public Health Source Type: news

The effect of speed on foldable ROPS actuation forces - Khorsandi F, Ayers PD, Jackson DL, Wilkerson J.
The number of fatalities caused by tractor rollovers has decreased in recent years, but the number of fatal tractor rollover accidents with a folded-down rollover protective structure (ROPS) has increased. Operating a ROPS-equipped tractor in low overhead ... (Source: SafetyLit)
Source: SafetyLit - November 17, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Effects of rubber tracks on narrow-track tractors on the non-continuous rolling prediction model - Franceschetti B, Capacci E, Rondelli V.
Tractor rollover is one of the most hazardous events for the driver. The rollover protective structure (ROPS) was introduced to passively protect the driver. In the specific case of two-post protective structures fitted in front of the driver on narrow-tra... (Source: SafetyLit)
Source: SafetyLit - November 17, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Development of an open-source tractor driving simulator for tractor stability tests - Ochoa Lleras N, Brennan S, Murphy D, Klena J, Garvey PM, Sommer Iii HJ.
Developing devices for stability monitoring and rollover alerts is a promising possibility to prevent overturn events, which pose a severe risk to tractor operators. However, performing relevant tests with operators in the field is dangerous and impractica... (Source: SafetyLit)
Source: SafetyLit - November 17, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Development and evaluation of a computer-based ROPS design program - Ayers PD, Khorsandi F, John Y, Whitaker G.
Tractor overturn is the leading cause of agricultural fatalities in the U.S. Most of these fatalities can be eliminated using a rollover protective structure (ROPS) and a seatbelt. Unfortunately, not all agricultural tractors designed to support ROPS have ... (Source: SafetyLit)
Source: SafetyLit - November 17, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Determining the effectiveness of mirrors and camera systems in monitoring the rearward visibility of self-propelled agricultural machinery - Ehlers SG, Field WE.
This study concerned the ability of operators of tractors and other self-propelled agricultural machinery to visually recognize objects and/or hazards within close proximity to the rear of those machines and/or any implements in tow, especially when backin... (Source: SafetyLit)
Source: SafetyLit - November 17, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Autonomous vehicles' disengagements: trends, triggers, and regulatory limitations - Favar ò F, Eurich S, Nader N.
Autonomous Vehicle (AV) technology is quickly becoming a reality on US roads. Testing on public roads is currently undergoing, with many AV makers located and testing in Silicon Valley, California. The California Department of Motor Vehicles (CA DMV) curre... (Source: SafetyLit)
Source: SafetyLit - November 17, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Australian leadership: saving lives with crush prevention devices - Myers ML.
The burden of injury and death due to quad bike [all-terrain vehicle, or ATV] use cannot be allowed to continue unchecked, and ongoing delay in action may permit to further avoidable tragedies." -Royal Australasian College of Surgeons (2016, p. 13).... (Source: SafetyLit)
Source: SafetyLit - November 17, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Agricultural worker injury comparative risk assessment methodology: assessing corn and biofuel switchgrass production systems - Schwab CV, Mosher GA, Ryan SJ.
Keeping workers safe is a continuing challenge in agricultural production. Risk assessment methodologies have been used widely in other industries to better understand systems and enhance decision making, yet their use in production agriculture has been li... (Source: SafetyLit)
Source: SafetyLit - November 17, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

A video-based real-time adaptive vehicle-counting system for urban roads - Liu F, Zeng Z, Jiang R.
In developing nations, many expanding cities are facing challenges that result from the overwhelming numbers of people and vehicles. Collecting real-time, reliable and precise traffic flow information is crucial for urban traffic management. The main purpo... (Source: SafetyLit)
Source: SafetyLit - November 17, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Geoengineering Research Receives Backing at House Science Committee Hearing
Republican committee leaders  expressed hope that geoengineering technologies could someday address climate change. Democratic members were more cautious, supporting research but emphasizing it should not be viewed as a substitute for emissions reductions or other approaches for combating climate change. (Source: FYI: The AIP Bulletin of Science Policy News)
Source: FYI: The AIP Bulletin of Science Policy News - November 16, 2017 Category: Physics Authors: awolfe Source Type: news

DOE ’s Termination of Low Dose Radiation Research Receives Bipartisan Pushback
The House Science Committee held a hearing earlier this month at which witnesses testified to the value of the Department of Energy ’s recently terminated research program on low dose radiation. Despite bipartisan congressional support for the research, DOE has been reluctant to continue work in the area. (Source: FYI: The AIP Bulletin of Science Policy News)
Source: FYI: The AIP Bulletin of Science Policy News - November 16, 2017 Category: Physics Authors: wthomas Source Type: news

The scaling structure of the global road network - Strano E, Giometto A, Shai S, Bertuzzo E, Mucha PJ, Rinaldo A.
Because of increasing global urbanization and its immediate consequences, including changes in patterns of food demand, circulation and land use, the next century will witness a major increase in the extent of paved roads built worldwide. To model the effe... (Source: SafetyLit)
Source: SafetyLit - November 16, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Earth ’s body tide hints at deep mantle structure
Flash Physics: need-to-know updates from the world of physics (Source: PhysicsWeb News)
Source: PhysicsWeb News - November 16, 2017 Category: Physics Source Type: news

Wheelchair services and use outcomes: a cross-sectional survey in Kenya and the Philippines - Bazant ES, Himelfarb Hurwitz EJ, Onguti BN, Williams EK, Noon JH, Xavier CA, Garcia FDS, Gichangi A, Gabbow M, Musakhi P, Lee Kirby R.
This study examined the relationship of wheelchair service provision in Kenya and the Philippines and wheelchair-use-related outcomes. METHOD: We ... (Source: SafetyLit)
Source: SafetyLit - November 16, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Coefficient of friction, walking speed and cadence on slippery and dry surfaces: shoes with different groove depths - Ziaei M, Mokhtarinia HR, Tabatabai Ghomshe F, Maghsoudipour M.
OBJECTIVE: The aim of the present study was to determine the coefficient of friction (COF), walking speed (WS), and cadence while walking on slippery and dry surfaces using shoes with different sole groove depths to predict how much it is likely to fall. ... (Source: SafetyLit)
Source: SafetyLit - November 16, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Micro-spectroscopy opens new routes for diagnostics
(Changchun Institute of Optics, Fine Mechanics and Physics) In recent years, optics and photonics, and in particular the microspectroscopic techniques, have demonstrated their effectiveness for the materials analysis. The work 'Non-contact mechanical and chemical analysis of single living cells by micro-spectroscopic techniques' which will appear in the journalNature-Light: Science& Applications (LSA), introduces the use of a new spectrometer capable of analysing living cells in situ, in non-invasive manner and with sub-micrometric spatial resolution. (Source: EurekAlert! - Biology)
Source: EurekAlert! - Biology - November 16, 2017 Category: Biology Source Type: news

‘Target skyrmions’ swirl on tiny discs
Stable structures need no applied magnetic field (Source: PhysicsWeb News)
Source: PhysicsWeb News - November 16, 2017 Category: Physics Source Type: news

State-to-state chemistry for three-body recombination in an ultracold rubidium gas
Experimental investigation of chemical reactions with full quantum state resolution for all reactants and products has been a long-term challenge. Here we prepare an ultracold few-body quantum state of reactants and demonstrate state-to-state chemistry for the recombination of three spin-polarized ultracold rubidium (Rb) atoms to form a weakly bound Rb2 molecule. The measured product distribution covers about 90% of the final products, and we are able to discriminate between product states with a level splitting as small as 20 megahertz multiplied by Planck’s constant. Furthermore, we formulate propensity rules for t...
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Wolf, J., Deiss, M., Krükow, A., Tiemann, E., Ruzic, B. P., Wang, Y., DIncao, J. P., Julienne, P. S., Denschlag, J. H. Tags: Chemistry, Physics reports Source Type: news

Compacted dimensions and singular plasmonic surfaces
We report a simple model, unconnected to field theory, for a compacted dimension realized in a metallic metasurface periodically structured in the form of a grating comprising a series of singularities. An extra dimension of the grating is hidden, and the surface plasmon excitations, though localized at the surface, are characterized by three wave vectors rather than the two of typical two-dimensional metal grating. We propose an experimental realization in a doped graphene layer. (Source: ScienceNOW)
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Pendry, J. B., Huidobro, P. A., Luo, Y., Galiffi, E. Tags: Physics reports Source Type: news

Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth
We report the detection, using the High-Altitude Water Cherenkov Observatory (HAWC), of extended tera–electron volt gamma-ray emission coincident with the locations of two nearby middle-aged pulsars (Geminga and PSR B0656+14). The HAWC observations demonstrate that these pulsars are indeed local sources of accelerated leptons, but the measured tera–electron volt emission profile constrains the diffusion of particles away from these sources to be much slower than previously assumed. We demonstrate that the leptons emitted by these objects are therefore unlikely to be the origin of the excess positrons, which may...
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Abeysekara, A. U., Albert, A., Alfaro, R., Alvarez, C., Alvarez, J. D., Arceo, R., Arteaga-Velazquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Barber, A. S., Bautista-Elivar, N., Becerril, A., Belmont-Moreno, E., BenZvi, S. Y., Berley, D., Bernal, A. Tags: Astronomy, Physics reports Source Type: news

Tunable excitons in bilayer graphene
Excitons, the bound states of an electron and a hole in a solid material, play a key role in the optical properties of insulators and semiconductors. Here, we report the observation of excitons in bilayer graphene (BLG) using photocurrent spectroscopy of high-quality BLG encapsulated in hexagonal boron nitride. We observed two prominent excitonic resonances with narrow line widths that are tunable from the mid-infrared to the terahertz range. These excitons obey optical selection rules distinct from those in conventional semiconductors and feature an electron pseudospin winding number of 2. An external magnetic field induc...
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Ju, L., Wang, L., Cao, T., Taniguchi, T., Watanabe, K., Louie, S. G., Rana, F., Park, J., Hone, J., Wang, F., McEuen, P. L. Tags: Materials Science reports Source Type: news

Full momentum- and energy-resolved spectral function of a 2D electronic system
The single-particle spectral function measures the density of electronic states in a material as a function of both momentum and energy, providing central insights into strongly correlated electron phenomena. Here we demonstrate a high-resolution method for measuring the full momentum- and energy-resolved electronic spectral function of a two-dimensional (2D) electronic system embedded in a semiconductor. The technique remains operational in the presence of large externally applied magnetic fields and functions even for electronic systems with zero electrical conductivity or with zero electron density. Using the technique ...
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Jang, J., Yoo, H. M., Pfeiffer, L. N., West, K. W., Baldwin, K. W., Ashoori, R. C. Tags: Physics reports Source Type: news

Arbitrary spin-to-orbital angular momentum conversion of light
We present a method for converting arbitrary SAM states into total angular momentum states characterized by a superposition of independent OAM. We designed a metasurface that converts left- and right-circular polarizations into states with independent values of OAM and designed another device that performs this operation for elliptically polarized states. These results illustrate a general material-mediated connection between SAM and OAM of light and may find applications in producing complex structured light and in optical communication. (Source: ScienceNOW)
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Devlin, R. C., Ambrosio, A., Rubin, N. A., Mueller, J. P. B., Capasso, F. Tags: Physics reports Source Type: news

Photoionization in the time and frequency domain
Ultrafast processes in matter, such as the electron emission after light absorption, can now be studied using ultrashort light pulses of attosecond duration (10–18 seconds) in the extreme ultraviolet spectral range. The lack of spectral resolution due to the use of short light pulses has raised issues in the interpretation of the experimental results and the comparison with theoretical calculations. We determine photoionization time delays in neon atoms over a 40–electron volt energy range with an interferometric technique combining high temporal and spectral resolution. We spectrally disentangle direct ionizat...
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Isinger, M., Squibb, R. J., Busto, D., Zhong, S., Harth, A., Kroon, D., Nandi, S., Arnold, C. L., Miranda, M., Dahlström, J. M., Lindroth, E., Feifel, R., Gisselbrecht, M., LHuillier, A. Tags: Physics r-articles Source Type: news

Resetting the clock on photoemission
(Source: ScienceNOW)
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Osborne, I. S. Tags: Physics twis Source Type: news

Tracking a trio of rubidium atoms
(Source: ScienceNOW)
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Yeston, J. Tags: Chemistry, Physics twis Source Type: news

Delving deep into electronic properties
(Source: ScienceNOW)
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Stajic, J. Tags: Physics twis Source Type: news

From spins to spirals
(Source: ScienceNOW)
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Osborne, I. S. Tags: Physics twis Source Type: news

Exotic origin for cosmic positrons
(Source: ScienceNOW)
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Smith, K. T. Tags: Astronomy, Physics twis Source Type: news

How to hide a dimension from view
(Source: ScienceNOW)
Source: ScienceNOW - November 16, 2017 Category: Science Authors: Osborne, I. S. Tags: Physics twis Source Type: news

IBM offers 20-qubit quantum computer to clients
Flash Physics: need-to-know updates from the world of physics (Source: PhysicsWeb News)
Source: PhysicsWeb News - November 15, 2017 Category: Physics Source Type: news

New microscope technologies light up vital medical research
New photonic microscopes, systems and techniques developed within the EU-backed PHOQUS project are shining a light on vital medical research bringing life sciences and physics closer together. Findings will have direct applications in medicine, especially for better disease diagnosis. (Source: EUROPA - Research Information Centre)
Source: EUROPA - Research Information Centre - November 15, 2017 Category: Research Source Type: news

On The Alien Question: Where Are They?
The great physicist Enrico Fermi asked this question in the 1950s. There are more than 50 possible "solutions" to Fermi's Paradox: Here, astrophysicist Marcelo Gleiser explores a few.(Image credit: Ken Brown/Getty Images) (Source: NPR Health and Science)
Source: NPR Health and Science - November 14, 2017 Category: Consumer Health News Authors: Marcelo Gleiser Source Type: news

"Horrendoplasty" - a case of total perineal destruction by agricultural implement - de Oliveira PS, de Oliveira TR, Martinho D, Martins F.
Although posterior urethral injury occurs almost always in association with pelvic fracture, it may result from severe trauma to the perineum with its associated potential lethality and severe morbidity. Early primary endoscopic realignment over a urethral... (Source: SafetyLit)
Source: SafetyLit - November 13, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news

Correction to: Impact performance of modern football helmets - Viano DC, Withnall C, Halstead D.
This erratum is to correct headings listing the impact location and speed in Figs.  5 and 6. The following provides corrected Figs. 5 and 6. The data is unchanged. The authors apologize for any inconvenience this might have caused. Keywords: American f... (Source: SafetyLit)
Source: SafetyLit - November 13, 2017 Category: International Medicine & Public Health Tags: Engineering, Physics, Structural Soundness and Failure Source Type: news