Current Logarithmic News and Events

Current Logarithmic News and Events, Logarithmic News Articles.
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Hierarchical dynamics
Researchers investigate signal transfer in proteins across multiple time scales (2021-02-03)

Efficient fluorescent materials and OLEDs for the NIR
Near-infrared emitters (NIR) will be of crucial importance for a variety of biomedical, security and defence applications, as well as for (in)visible light communications and the internet-of-things (IoT). Researchers from the UK and Italy have developed porphyrin oligomer NIR emitters which afford high efficiencies despite being totally free from heavy metals. They demonstrated organic light-emitting diodes (OLEDs) at 850 nm with 3.8% peak external quantum efficiency, together with a novel quantitative model of device efficiency. (2021-01-28)

Grasping exponential growth
Most people underestimate exponential growth, including when it comes to the spread of the coronavirus. The ability to grasp the magnitude of exponential growth depends on the way in which it is communicated. Using the right framing helps to understand the benefit of mitigation measures, especially during a pandemic. (2020-12-14)

New physical picture leads to a precise finite-size scaling of (3+1)-dimensional O(n) critical system
Logarithmic finite-size scaling of O(n) critical systems at upper critical dimensionality has been a long-standing issue. Recently, scientists based in China and US provided a new physical picture. On this basis, they established an explicit scaling form for the free energy density, which simultaneously consists of a scaling term for the Gaussian fixed point and another term with multiplicative logarithmic corrections. They found that the finite-size critical two-point correlation exhibits a two-length behavior. (2020-11-24)

Study describes COVID-19 transmission pattern
Model developed by Brazilian researchers predicts spatial and temporal evolution of epidemic diseases and can help plan more effective social isolation programs with less socio-economic impact. (2020-10-08)

Memory protein
When UC Santa Barbara materials scientist Omar Saleh and graduate student Ian Morgan sought to understand the mechanical behaviors of disordered proteins in the lab, they expected that after being stretched, one particular model protein would snap back instantaneously, like a rubber band. (2020-08-25)

Healing an Achilles' heel of quantum entanglement
Louisiana State University Associate Professor of Physics Mark M. Wilde and his collaborator have solved a 20-year-old problem in quantum information theory on how to calculate entanglement cost--a way to measure entanglement--in a manner that's efficiently computable, useful, and broadly applicable in several quantum research areas. (2020-07-29)

When calling loudly, echolocation is costly for small bats
Calling in the ultrasonic range enables small bats to orient themselves in the dark and track down insects. Louder calls travel farther, improving a bat's ability to detect their prey. It was long assumed that echolocation does not contribute much to energy expenditure in flight because individuals couple their calls with the beat of their wings. Scientists at the Leibniz-IZW in Berlin have now shown that high intensity echolocation calls substantially contribute to energy expenditure. (2020-07-13)

10,000 times faster calculations of many-body quantum dynamics possible
How an electron behaves in an atom, or how it moves in a solid, can be predicted precisely with the equations of quantum mechanics. These theoretical calculations agree with the results from experiments. But complex quantum systems, which contain many electrons or elementary particles can currently not be described exactly. A team from Kiel University has now developed a simulation method, which enables quantum mechanical calculations up to around 10,000 times faster than previously possible. (2020-02-20)

Physicists look to navigational 'rhumb lines' to study polymer's unique spindle structure
A new study describes how spheres can be transformed into twisted spindles thanks to insights from 16th century navigational tools. Researchers show how polymers can contract into spiral structures, known as loxodromes, that have complex patterning ten times smaller than the width of a human hair. The research was a collaboration between physicists at the University of Pennsylvania and the École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI). (2019-10-11)

Groovy! These grooved patterns better mitigate shock waves
A team of engineers at UC San Diego has discovered a method that could make materials more resilient against massive shocks such as earthquakes or explosions. They found that cutting small grooves in obstacle materials diminished the impacts of what's called the reflected shock wave--once the initial wave has hit the spiral of obstacles and bounced back. (2019-09-13)

Music charts are increasingly short-lived
Cultural processes are increasingly short-lived, showing in addition a growing tendency toward self-organisation. As a result, success is now governed by a universal law. This was discovered by the physicists Professor Claudius Gros and Lukas Schneider from Goethe University. Their object of research: 50 years of music charts. (2019-08-21)

Improving researchers' abilities to forecast epidemics
An annual influenza season forecasting challenge issued by the US Centers for Disease Control provides unique insight into epidemic forecasting, according to a study published in the journal Scientific Reports. (2019-03-08)

Bioinspired camera could help self-driving cars see better
Inspired by the visual system of the mantis shrimp-researchers have created a new type of camera that could greatly improve the ability of cars to spot hazards in challenging imaging conditions. (2018-10-11)

Children found capable of using the 'wisdom of crowds'
Children, like adults, can improve their response to difficult tasks by the power of group work, new research led by the University of Bristol has found. (2018-09-24)

Mathematicians propose first continuous self-organised criticality model
An international group of researchers (the first author is Nikita Kalinin, Higher School of Economics - Saint-Petersburg, the last author is Ernesto Lupercio, CINVESTAV, Mexico) has presented the first continuous model describing self-organised criticality. The proposed solution is simpler and more universal than the classical sandpile model: it integrates areas as remote from one another as economics, developmental biology and gravity in the context of tropical geometry. The paper was published in PNAS: (2018-09-12)

Research finds quakes can systematically trigger other ones on opposite side of Earth
New research shows that a big earthquake can not only cause other quakes, but large ones, and on the opposite side of the Earth. (2018-08-02)

UCI simulation technique models material-aging process
Imagine if engineers could build structures with materials that do not degrade over time. Researchers at the University of California, Irvine have proposed a new simulation technique that could help engineers do just that. (2018-05-04)

Making big data a little smaller
Harvard computer scientist found that the Johnson-Lindenstrauss lemma, a 30-year-old therum, is the best approach to pre-process large data into a manageably low dimension for algorithmic processing. (2017-10-18)

Acidified ocean water widespread along North American West Coast
A three-year survey of the California Current System along the West Coast of the United States found persistent, highly acidified water throughout this ecologically critical nearshore habitat, with 'hotspots' of pH measurements as low as any oceanic surface waters in the world. (2017-05-31)

NASA examines newly formed Tropical Depression 3W in 3-D
Tropical Depression 03W formed in the Pacific Ocean west of Guam on April 24, 2017, and data from the Global Precipitation Measurement Mission or GPM core satellite was used to look at the storm in 3-D. (2017-04-25)

The beginning of the end of order
Classical physics states that a crystal consists of perfectly ordered particles from a continuous symmetrical atomic structure. The Mermin-Wagner theorem from 1966 broke with this view: it states that in one-dimensional and two-dimensional atomic structures (for example in an atomic chain or membrane) there cannot be perfect ordering of particles over long ranges. (2017-03-30)

Killer spirals offer wild ride
Øyvind Hammer was first seduced by the spiral's charms 20 years ago while studying fossils and with his new book he aims to make others susceptible. After reading it, you'll look for spirals wherever you turn and Hammer will have succeeded in his 'evil scheme.' (2017-03-15)

Pokémon Go and the potential for increased accidents
New research published by Oxford Medical Case Reports indicates that augmented reality games like Pokémon Go, while holding great promise to promote exercise, also increases the potential for distraction-related death. (2016-10-05)

New book on participatory approach to modern geometry caters to non-math majors
World Scientific has published a book on the 'Participatory approach to Modern Geometry' by Jay Kappraff. (2015-01-13)

Golden Ratio offers a unity of science
Researchers are suggesting that the 'Golden Ratio' -- designated by the Greek symbol ∅ (letter Phi) with a mathematical value of about 1.618 -- also relates to the topology of space-time, and to a biological species constant (T). (2014-11-27)

RSV research breakthrough to help infected children
Researchers at Le Bonheur Children's Hospital and the University of Tennessee Health Science Center announced results of a clinical trial of a new drug shown to safely reduce the viral load and clinical illness of healthy adult volunteers intranasally infected with respiratory syncytial virus (RSV). RSV is the most common cause of lower respiratory tract infections in young children in the United States and worldwide. (2014-07-24)

Market crashes are anomalous features in the financial data fractal landscape
Due to their previously discovered fractal nature, financial data patterns are self-similar when scaling up. New research shows that the most extreme events in financial data dynamics -- reflected in very large price moves -- are incompatible with multi-fractal scaling. These findings have been published in EPJ B by physicist Elena Green and colleagues. Understanding the multi-fractal structure of financially sound markets could, ultimately, help in identifying structural signs of impending extreme events. (2014-06-16)

Improved computer simulations enable better calculation of interfacial tension
Researchers from Mainz University identify novel mechanisms of logarithmic finite-size corrections relevant to the determination of interfacial tension. (2014-05-20)

The unexpected power of baby math
A new study from Tel Aviv University has found new evidence that educated adults retain traces of their innate sense of numbers from childhood -- and that it's more powerful than many scientists think. The findings could contribute to the development of methods to more effectively educate or treat children with learning disabilities and people with brain injuries. (2014-01-22)

MIT research: What number is halfway between 1 and 9? Is it 5 -- or 3?
A new information-theoretical model of human sensory perception and memory sheds light on some peculiarities of the nervous system. (2012-10-05)

TacSat-4 participates in Navy fleet experiment Trident Warrior
NRL provides TacSat-4 SATCOM testing and training during the 2012 Trident Warrior Experiment. (2012-08-29)

UD's long-term monitoring shows 60 percent reduction in acidity of Delaware rain
Several decades ago, precipitation in Delaware was among the most acidic in the country. The scientific consensus is that pollution controls enacted through the Clean Air Act Amendments in the 1990s and other measures have helped decrease the acidity of rain by approximately 60 percent to less harmful levels, as reflected in data gathered nationwide and by UD researchers in Lewes, Del., as part of a longstanding study. (2012-05-02)

Slow road to stability for emulsions
By studying the behavior of tiny particles at an interface between oil and water, researchers at Harvard have discovered that stabilized emulsions may take much longer to reach equilibrium than previously thought. The findings have important implications for the manufacturing processes used in pharmaceuticals, cosmetics, and foods, among other chemical industries. (2011-12-09)

Amount of AIDS virus in genital secretions predicts risk of heterosexual transmission
In a study that took place in seven African countries, higher concentrations of the AIDS virus in genital secretions were linked to a greater risk of virus transmission between opposite-sex couples. The effect is independent of blood levels of the virus. The findings point to research strategies to make HIV positive people less infectious to their partners. The genital HIV levels may be a marker of effectiveness in testing preventive strategies. (2011-04-06)

How spring-loaded filaree seeds self launch
When filaree seeds ripen and burst, they are launched with an inbuilt spring. Scientists based at the University of California, Berkeley, and Harvard University have discovered that the inbuilt spring stores energy as the seed head dries and can flick the seed as far as 0.5m before drilling it into the soil by repeatedly unwinding and rewinding as the humidity rises and falls. (2011-01-27)

Child's 'mental number line' affects memory for numbers
As children in Western cultures grow, they learn to place numbers on a mental number line, with smaller numbers to the left and spaced further apart than the larger numbers on the right. Then the number line changes to become more linear, with small and large numbers the same distance apart. Children whose number line has made this change are better at remembering numbers, according to a new study published in the journal Psychological Science. (2010-09-09)

Spherical cows help to dump metabolism law
The mysterious (2010-02-02)

Refinement of glaucoma testing, treatment expected from US, United Kingdom study
An Indiana University School of Optometry researcher's ongoing work to improve testing for and treatment of one of the world's leading causes of blindness will advance with support from a $2.35 million grant from the National Institutes of Health. IU Professor William H. Swanson will lead research from patient studies in Bloomington, Indianapolis and New York City, coupled with data from the United Kingdom. (2010-01-14)

New method proposed to calculate reduction in road accident deaths
A team of engineers from the University of Almeria has developed a methodology to help meet the EU objective of cutting road deaths by 50 percent between 2000 and 2010. The researchers have calculated the relevant amount for each country according to its starting point, and have done the same for each of the Spanish provinces. (2009-10-15)

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