Tuesday 30 November 2021

In the quantum realm, not even time flows as you might expect

In the quantum realm, not even time flows as you might expect
A team of physicists has shown how quantum systems can simultaneously evolve along two opposite time arrows - both forward and backward in time. The study necessitates a rethink of how the flow of time is understood and represented in contexts where quantum laws play a crucial role.

source https://www.sciencedaily.com/releases/2021/11/211126130851.htm

Loss of ancient grazers triggered a global rise in fires

Loss of ancient grazers triggered a global rise in fires
From 50,000 years to 6,000 years ago, many of the world's largest animals, including such iconic grassland grazers as the woolly mammoth, giant bison, and ancient horses, went extinct. The loss of these grazing species triggered a dramatic increase in fire activity in the world's grasslands, according to a new study.

source https://www.sciencedaily.com/releases/2021/11/211125154838.htm

'Magic wand' reveals a colorful nano-world

'Magic wand' reveals a colorful nano-world
Researchers describe a revolutionary imaging technology that compresses lamp light into a nanometer-sized spot. It holds that light at the end of a silver nanowire like a Hogwarts student practicing the 'Lumos' spell, and uses it to reveal previously invisible details, including colors, in nanomaterials such as carbon nanotubes.

source https://www.sciencedaily.com/releases/2021/11/211125154829.htm

Monday 29 November 2021

A new artificial material mimics quantum entangled rare earth compounds

A new artificial material mimics quantum entangled rare earth compounds
Physicists have created a new ultra-thin two-layer material with quantum properties that normally require rare earth compounds. This material, which is relatively easy to make and does not contain rare earth metals, could provide a new platform for quantum computing and advance research into unconventional superconductivity and quantum criticality.

source https://www.sciencedaily.com/releases/2021/11/211124153917.htm

Friday 26 November 2021

Clear as (quasi) crystal: Scientists discover the first ferromagnetic quasicrystals

Clear as (quasi) crystal: Scientists discover the first ferromagnetic quasicrystals
Since the discovery of quasicrystals (QCs), solids that mimic crystals in their long-range order but lack periodicity, scientists have sought physical properties related to their peculiar structure. Now, an international group of researchers report a long-range magnetic order in QCs with icosahedral symmetry that turn ferromagnetic below certain temperatures. This groundbreaking discovery opens doors to future research on these exotic materials.

source https://www.sciencedaily.com/releases/2021/11/211122135444.htm

Thursday 25 November 2021

Can we perceive gender from children's voices?

Can we perceive gender from children's voices?
Researchers report developing a database of speech samples from children ages 5 to 18 to explore two questions: What types of changes occur in children's voices as they become adults, and how do listeners adjust to the enormous variability in acoustic patterns across speakers? When they presented listeners with both syllables and sentences from different speakers, gender identification improved for sentences. They said this supports the stylistic elements of speech that highlight gender differences and come across better in sentences.

source https://www.sciencedaily.com/releases/2021/11/211123131326.htm

Ancient human relative, Australopithecus sediba, 'walked like a human, but climbed like an ape'

Ancient human relative, Australopithecus sediba, 'walked like a human, but climbed like an ape'
The recovery of new lumbar vertebrae from the lower back of a single individual of the human relative, Australopithecus sediba, and portions of other vertebrae of the same female from Malapa, South Africa, together with previously discovered vertebrae, form one of the most complete lower backs ever discovered in the early hominid record and give insight into how this ancient human relative walked and climbed.

source https://www.sciencedaily.com/releases/2021/11/211123130821.htm

Analysis of Mars’s wind-induced vibrations sheds light on the planet’s subsurface properties

Analysis of Mars’s wind-induced vibrations sheds light on the planet’s subsurface properties
NASA's Mars mission InSight probes the geology of the Elysium Planitia, finding alternate layers of basalt and sediments. An international team of scientists compares on-the-ground data with data from models, which helps to understand, e.g., the surface's load-bearing capacity and trafficability.

source https://www.sciencedaily.com/releases/2021/11/211123130704.htm

From Elkton to Green, the Evolution of Muni’s Oldest Rail Yard

From Elkton to Green, the Evolution of Muni’s Oldest Rail Yard
From Elkton to Green, the Evolution of Muni’s Oldest Rail Yard
By Jeremy Menzies

In part two of our two-part series on one of the city’s oldest transit properties, we bring you the history of Muni’s Green Division. Green Division, also known as Muni Metro Center, has served as the primary maintenance and repair facility for our rail fleet for over 40 years.

Construction began on Green Division in 1975. This new rail facility would replace Elkton Shops, which was built in 1907. The new shops were built in two phases, first the shop building then the rail yard.

This 1976 photo shows major excavation and concrete work underway for the main shops building of Green Division.  At far left is Elkton Shops built in 1907 by the United Railroads Company.This 1976 photo shows major excavation and concrete work underway for the main shops building of Green Division.  At far left is Elkton Shops built in 1907 by the United Railroads Company.

In phase one of the project, crews demolished the bus yard occupying the eastern half of the property and built a massive new building that would house repair and maintenance shops for a new fleet of Muni rail vehicles. This phase took about two years to complete.

Construction progress on Muni Metro Center in November 1975 shows the main structure of the building taking shape.

Construction progress on Muni Metro Center in November 1975 shows the main structure of the building taking shape.

By May 27, 1977, the new shop building was completed and employees finished their last day of work in the 70-year-old Elkton Shops. Just a few days later, they moved into a brand-new building and demolition began on Elkton to make way for construction of a large rail yard in phase two of the project.

This staff group photo was taken on opening day of Muni Metro Center on June 1, 1977.

This staff group photo was taken on opening day of Muni Metro Center on June 1, 1977.

Work on the rail yard progressed quickly as Muni was anticipating the arrival of the first light rail vehicles or LRVs, a modernized version of the electric streetcars of the past. The new LRVs were designed and built by the Boeing Vertol company in a joint venture between Muni and Boston’s MBTA. The new vehicles would run in the Muni Metro, which combined Muni’s surviving streetcar lines with a subway underneath Market Street to create a more integrated rail system.

Aerial photo of construction on the rail yard where Elkton Shops once stood from August 1977

Work progresses on the rail yard where Elkton Shops once stood in this August 1977 photo.

The arrival of Boeing LRVs came in October 1977 while the rail yard was still under construction. A small crowd of city officials, staff and press celebrated the arrival of the first two cars outside Green Division. In a short time over 100 LRVs would come to form the backbone of all Muni rail lines.

This October 24, 1977 photo shows Muni’s first two LRVs on display after arrival from the factory.

This October 24, 1977 photo shows Muni’s first two LRVs on display after arrival from the factory.

On July 11, 1979, Muni Metro Center was dedicated and a new fleet of LRVs waited in the yard to start serving the city. Just one year later, the Muni Metro system and Market Street Subway would open and the railyard’s key role in maintaining the new fleet would come into full effect.

1979 aerial shot looking southwest near San Jose and Ocean Avenues shows a newly completed Muni Metro Center and surrounding area

This November 1979 aerial shot looking southwest near San Jose and Ocean Avenues shows a newly completed Muni Metro Center and surrounding area.

On May 12, 1987, Muni Metro Center was re-dedicated as the “Curtis E. Green Light Rail Center” in honor of former Muni General Manager Curtis E. Green, who worked his way up from a bus driver to become the first African American appointed head of Muni.

Green Division shop staff work on the truck from a Boeing LRV in this early 1980s photo.

Green Division shop staff work on the truck from a Boeing LRV in this early 1980s photo.

​​​​​​​Today, staff at Green Division carry on an over 100-year-old tradition started in 1907 with the United Railroads’ Elkton Shops. Working daily performing every job from routine maintenance and inspections to overhauling major components, the shops are critical to moving San Francisco.

 

 



Published November 24, 2021 at 11:10PM
https://ift.tt/3FJQadR

Wednesday 24 November 2021

Taking it easy as you get older? Wrong

Taking it easy as you get older? Wrong
A team of evolutionary biologists and biomedical researchers lay out evolutionary and biomedical evidence showing that humans, who evolved to live many decades after they stopped reproducing, also evolved to be relatively active in their later years. The researchers say that physical activity later in life shifts energy away from processes that can compromise health and toward mechanisms in the body that extend it. They hypothesize that humans evolved to remain physically active as they age -- and in doing so to allocate energy to physiological processes that slow the body's gradual deterioration over the years. This guards against chronic illnesses such as cardiovascular disease, type 2 diabetes, and even some cancers.

source https://www.sciencedaily.com/releases/2021/11/211122172720.htm

Ultrashort-pulse lasers kill bacterial superbugs, spores

Ultrashort-pulse lasers kill bacterial superbugs, spores
Researchers at Washington University School of Medicine in St. Louis have found that multidrug-resistant bacteria and bacterial spores can be killed by ultrashort-pulse lasers. The findings could lead to new ways to sterilize wounds and blood products without damaging human cells.

source https://www.sciencedaily.com/releases/2021/11/211123162812.htm

Microbes can provide sustainable hydrocarbons for the petrochemical industry

Microbes can provide sustainable hydrocarbons for the petrochemical industry
The petrochemical industry turns oil and gas into precursors used to synthesize lubricants and other critical products. Chemists show that bacteria can be metabolically engineered to generate similar precursors, providing a sustainable replacement for fossil fuels and using less energy. The microbes need only glucose. The medium-chain hydrocarbons they produce can be broken down into shorter chains and polymerized into plastics, or lengthened to make products such as diesel.

source https://www.sciencedaily.com/releases/2021/11/211123162806.htm

Monkeys, guinea pigs and native English speakers have very similar brain responses to speech sounds, study finds

Monkeys, guinea pigs and native English speakers have very similar brain responses to speech sounds, study finds
Speech sounds elicit comparable neural responses and stimulate the same region in the brain of humans, macaques and guinea pigs, researchers report. The finding could help pave the way for better understanding and diagnosis of auditory processing deficits.

source https://www.sciencedaily.com/releases/2021/11/211119155501.htm

Justinianic Plague was nothing like flu and may have struck England before it reached Constantinople, new study suggests

Justinianic Plague was nothing like flu and may have struck England before it reached Constantinople, new study suggests
'Plague sceptics' are wrong to underestimate the devastating impact that bubonic plague had in the 6th to 8th centuries CE, argues a new study based on ancient texts and recent genetic discoveries. The same study suggests that bubonic plague may have reached England before its first recorded case in the Mediterranean via a currently unknown route, possibly involving the Baltic and Scandinavia.

source https://www.sciencedaily.com/releases/2021/11/211119085132.htm

By keeping ferroelectric 'bubbles' intact, researchers pave way for new devices

By keeping ferroelectric 'bubbles' intact, researchers pave way for new devices
Scientists have discovered that ferroelectric bubbles remain intact and retain their electronic and electromechanical (piezoelectric) properties in a freestanding state. The discovery offers promise for novel microelectronics and energy-related applications.

source https://www.sciencedaily.com/releases/2021/11/211119155525.htm

Tuesday 23 November 2021

COVID-19 case severity: How genetic differences leave immune cells at a disadvantage

COVID-19 case severity: How genetic differences leave immune cells at a disadvantage
New research shows how genetic variations linked to severe cases of COVID-19 affect our immune cells. The study is one of the first in-depth look at the connections between COVID-19 severity and gene expression in many types of immune cells. This work could guide the development of new COVID-19 therapies to boost immune cell function.

source https://www.sciencedaily.com/releases/2021/11/211119085124.htm

Scientist reveals cause of lost magnetism at meteorite site

Scientist reveals cause of lost magnetism at meteorite site
A scientist has discovered a method for detecting and better defining meteorite impact sites that have long lost their tell-tale craters. The discovery could further the study of not only Earth's geology but also that of other bodies in our solar system.

source https://www.sciencedaily.com/releases/2021/11/211122135529.htm

Hurricanes expected to linger over Northeast cities, causing greater damage

Hurricanes expected to linger over Northeast cities, causing greater damage
By the late 21st century, northeastern U.S. cities will see worsening hurricane outcomes, with storms arriving more quickly but slowing down once they've made landfall. As storms linger longer over the East Coast, they will cause greater damage along the heavily populated corridor, according to a new study.

source https://www.sciencedaily.com/releases/2021/11/211122135525.htm

One in five galaxies in the early universe could still be hidden behind cosmic dust

One in five galaxies in the early universe could still be hidden behind cosmic dust
Astronomers have discovered two previously invisible galaxies 29 billion light-years away. Their discovery suggests that up to one in five such distant galaxies remain hidden from our telescopes, camouflaged by cosmic dust. The new knowledge changes perceptions of our universe's evolution since the Big Bang.

source https://www.sciencedaily.com/releases/2021/11/211122135507.htm

Digital teaching: Opportunity or challenge?

Digital teaching: Opportunity or challenge?
Researchers explain why digital teaching cannot replace face-to-face teaching in university education, but can certainly be seen as a complementary tool. The future of teaching and learning may lie in so-called blended learning, a mix of face-to-face and online education.

source https://www.sciencedaily.com/releases/2021/11/211122135438.htm

How sugar-loving microbes could help power future cars

How sugar-loving microbes could help power future cars
It sounds like modern-day alchemy: Transforming sugar into hydrocarbons found in gasoline. But that's exactly what scientists have done. Researchers report harnessing the wonders of biology and chemistry to turn glucose (a type of sugar) into olefins (a type of hydrocarbon, and one of several types of molecules that make up gasoline).

source https://www.sciencedaily.com/releases/2021/11/211122135332.htm

Monday 22 November 2021

Reading the mind of a worm

Reading the mind of a worm
It sounds like a party trick: scientists can now look at the brain activity of a tiny worm and tell you which chemical the animal smelled a few seconds before. But the findings of a new study are more than just a novelty; they help the scientists better understand how the brain functions and integrates information.

source https://www.sciencedaily.com/releases/2021/11/211119155459.htm

Scientists create insights into perhaps the most extreme state of matter produced on Earth

Scientists create insights into perhaps the most extreme state of matter produced on Earth
Exotic laser-produced high-energy-density (HED) plasmas akin to those found in stars and nuclear explosions could provide insight into events throughout the universe. Physicists have discovered a new way to measure and understand these plasmas, among the most extreme states of matter ever produced on Earth. Improved understanding could provide benefits ranging from fine-tuning the high-density plasmas in inertial confinement fusion experiments to better understanding of processes throughout the universe.

source https://www.sciencedaily.com/releases/2021/11/211119085143.htm

Scientists solve 50-year-old mystery behind plant growth

Scientists solve 50-year-old mystery behind plant growth
A team of researchers has demonstrated for the first time one way that a small molecule turns a single cell into something as large as a tree. For half a century, scientists have known that all plants depend on this molecule, auxin, to grow. Until now, they didn't understand exactly how auxin sets growth in motion.

source https://www.sciencedaily.com/releases/2021/11/211118203802.htm

Insulin in the brain influences dopamins levels

Insulin in the brain influences dopamins levels
In the human brain, the hormone insulin also acts on the most important neurotransmitter for the reward system, dopamine. Insulin lowers the dopamine level in a specific region of the brain (striatum) that regulates reward processes and cognitive functions, among other things. This interaction can be an important driver of the brain's regulation of glucose metabolism and eating behavior.

source https://www.sciencedaily.com/releases/2021/11/211118203800.htm

Promising treatment for Alexander disease moves from rat model to human clinical trials

Promising treatment for Alexander disease moves from rat model to human clinical trials
Alexander disease is a progressive and rare neurological disorder with no cure or standard course of treatment. But a new study involving a rat model of the disease offers a potential treatment for the typically fatal condition.

source https://www.sciencedaily.com/releases/2021/11/211118203504.htm

Antarctic ice-sheet destabilized within a decade

Antarctic ice-sheet destabilized within a decade
After the natural warming that followed the last Ice Age, there were repeated periods when masses of icebergs broke off from Antarctica into the Southern Ocean. A new data-model study now shows that it took only a decade to initiate this tipping point in the climate system, and that ice mass loss then continued for many centuries.

source https://www.sciencedaily.com/releases/2021/11/211118203753.htm

Rivers play key role in destructive coastal flooding, new research shows

Rivers play key role in destructive coastal flooding, new research shows
Rising oceans get more attention in climate change discussions, but rivers are rising, too, according to new research by a University of South Carolina postdoctoral fellow. The research shows that rivers need more attention in policy management and disaster preparation, both at the coast and farther inland.

source https://www.sciencedaily.com/releases/2021/11/211118203745.htm

Sunday 21 November 2021

Speeding up the energy transition reduces climate risks

Speeding up the energy transition reduces climate risks
The World Climate Conference in Glasgow has just ended, and the question is whether the goal of maximum global heating of 1.5°C can still be achieved. In a model calculation, researchers show how the energy transition could lead to the lowest possible cumulative emissions: Instead of slowly cutting back emissions, we should quickly push ahead with the conversion to solar energy and use fossil power plants at full capacity for one last time to do so.

source https://www.sciencedaily.com/releases/2021/11/211118203731.htm

Live long and prosper: Study examines genetic gems in Galápagos giant tortoise genomes

Live long and prosper: Study examines genetic gems in Galápagos giant tortoise genomes
Galápagos giant tortoises can weigh well over 300 pounds and often live over 100 years. So what's the secret to their evolutionary success? A new study concludes that compared with other turtles, these animals evolved to have extra copies of genes -- called duplications -- that may protect against the ravages of aging, including cancer. Laboratory tests on Galápagos giant tortoise cells corroborate the idea that the animals have developed such defenses.

source https://www.sciencedaily.com/releases/2021/11/211118203711.htm

Bubbling up: Previously hidden environmental impact of bursting bubbles exposed in new study

Bubbling up: Previously hidden environmental impact of bursting bubbles exposed in new study
Bubbles are common in nature and can form when ocean waves break and when raindrops impact surfaces. When bubbles burst, they send tiny jets of water and other materials into the air. A new study examines how the interplay between bubble surfaces and water that contains organic materials contributes to the transport of aerosolized organic materials -- some of which are linked to the spread of disease or contamination -- into the atmosphere.

source https://www.sciencedaily.com/releases/2021/11/211118203607.htm

How ultracold, superdense atoms become invisible

How ultracold, superdense atoms become invisible
Physicists have confirmed that as atoms are chilled and squeezed to extremes, their ability to scatter light is suppressed, making them less visible. The findings show the Pauli exclusion principle, or Pauli blocking, applies not just to electrons but also to atoms.

source https://www.sciencedaily.com/releases/2021/11/211118203443.htm

Extreme heat events jeopardize cardiovascular health, experts warn

Extreme heat events jeopardize cardiovascular health, experts warn
A consequence of global warming is a greater frequency and intensity of extreme heat events. This extreme heat is associated with a greater risk of adverse cardiovascular incidents, especially for adults with pre-existing cardiovascular diseases.

source https://www.sciencedaily.com/releases/2021/11/211118061604.htm

Saturday 20 November 2021

The brain uses bodily signals to regulate fear

The brain uses bodily signals to regulate fear
Fear is essential for survival, but must be well regulated to avoid harmful behaviors such as panic attacks or exaggerated risk taking. Scientists have now demonstrated in mice that the brain relies on the body's feedback to regulate fear. The brain's insular cortex strongly reacts to stimuli signaling danger. However, when the body freezes in response to fear, the heartbeat slows down leading to attenuated insular cortex activity. Processing these opposing signals helps the insular cortex to keep fear in balance. The body's reactions are thus actively used to regulate emotions and are much more than passive emotional responses.

source https://www.sciencedaily.com/releases/2021/11/211118203429.htm

Groundwater in California’s Central Valley may be unable to recover from past and future droughts

Groundwater in California’s Central Valley may be unable to recover from past and future droughts
Groundwater in California's Central Valley is at risk of being depleted by pumping too much water during and after droughts. Under a best-case scenario, the researchers found there is a high probability it would take six to eight years to fully recover overdrafted water, but current California climate projections suggest realistic recovery times are even longer.

source https://www.sciencedaily.com/releases/2021/11/211118203426.htm

New imaging technology may reduce need for skin biopsies

New imaging technology may reduce need for skin biopsies
A new 'virtual histology' technology shows promise by analyzing images of suspicious-looking lesions and quickly producing a detailed, microscopic image of the skin, bypassing several standard steps typically used for diagnosis -- including skin biopsy, tissue fixation, processing, sectioning and histochemical staining.

source https://www.sciencedaily.com/releases/2021/11/211118203054.htm

Plumbing the depths: Defect distribution in ion-implanted SiC diodes

Plumbing the depths: Defect distribution in ion-implanted SiC diodes
Introducing a vertical arrangement of n and p layers into the drift layer of semiconductors to enable bipolar operation is a way around the 'unipolar limit' problem in semiconductors. But defect generation during the fabrication of such devices is a matter of concern. Researchers have examined the depth and distribution of defects formed by aluminum ion implantation in silicon carbide bipolar diodes to identify ways to induce efficient conductivity modulation.

source https://www.sciencedaily.com/releases/2021/11/211118061432.htm

Different kinds of marine phytoplankton respond differently to warming ocean temperatures

Different kinds of marine phytoplankton respond differently to warming ocean temperatures
A team of researchers has concluded that different types of phytoplankton will react differently to increasing ocean temperatures resulting from the changing climate. An examination of how four key groups of phytoplankton will respond to ocean temperatures forecast to occur between 2080 and 2100 suggests that their growth rates and distribution patterns will likely be dissimilar, resulting in significant implications for the future composition of marine communities around the globe.

source https://www.sciencedaily.com/releases/2021/11/211117211613.htm

Food scientists create zinc index for human body

Food scientists create zinc index for human body
Zinc deficiency is prevalent around the world, and among children, these mineral shortfalls can lead to stunting, embryonic malformations and neurobehavioral abnormalities. Over several decades, science has improved understanding of zinc metabolism, but an accurate, comprehensive assessment tool for its physiological status within a human body has remained elusive. Until now.

source https://www.sciencedaily.com/releases/2021/11/211117161416.htm

'Deepfaking the mind' could improve brain-computer interfaces for people with disabilities

'Deepfaking the mind' could improve brain-computer interfaces for people with disabilities
Researchers are using generative adversarial networks (GANs) -- technology best known for creating deepfake videos and photorealistic human faces -- to improve brain-computer interfaces for people with disabilities. The team successfully taught an AI to generate synthetic brain activity data. The data, specifically neural signals called spike trains, can be fed into machine-learning algorithms to improve the usability of brain-computer interfaces (BCI).

source https://www.sciencedaily.com/releases/2021/11/211118203621.htm

Study challenges standard ideas about piezoelectricity in ferroelectric crystals

Study challenges standard ideas about piezoelectricity in ferroelectric crystals
For years, researchers believed that the smaller the domain size in a ferroelectric crystal, the greater the piezoelectric properties of the material. However, recent findings have raised questions about this standard rule.

source https://www.sciencedaily.com/releases/2021/11/211117211515.htm

Chemistry breakthrough leads way to more sustainable pharmaceuticals

Chemistry breakthrough leads way to more sustainable pharmaceuticals
Chemistry researchers have developed a new method using blue light to create pharmaceuticals in a more sustainable way, significantly reducing the amount of energy needed and the chemical waste created in the manufacture process.

source https://www.sciencedaily.com/releases/2021/11/211117161359.htm

Advanced microscopes help scientists understand how cells break down proteins

Advanced microscopes help scientists understand how cells break down proteins
Researchers have used advanced electron microscopes to delve deeper into the process of protein degradation. They described the structure of a key enzyme that helps mediate ubiquitination in yeast, part of a cellular process called the N-degron pathway that may be responsible for determining the rate of degradation for up to 80% of equivalent proteins in humans.

source https://www.sciencedaily.com/releases/2021/11/211117115136.htm

Friday 19 November 2021

San Francisco Announces Bold Commitment to Safer Streets

San Francisco Announces Bold Commitment to Safer Streets
San Francisco Announces Bold Commitment to Safer Streets
By Ryan Reeves

Photograph of pedestrians crossing Howard Street; protected bike lanes in the foreground and background. “2021 Vision Zero SF Action Strategy” is overlaid on the image.

This week, San Francisco Mayor London Breed released  the 2021 Vision Zero Action Strategy—our City’s multi-agency framework for eliminating traffic deaths and reducing severe injuries.

The City and County of San Francisco committed to ending traffic fatalities through Vision Zero in 2014. Since then, our approach has continued to evolve – we've incorporated new strategies and expanded on existing and successful programs. In this updated plan, we commit to bold and ambitious strategies to create safer streets. We will double down on redesigns to make streets safer for people, and expand programs like our Vision Zero Quick-Build across the city’s High Injury Network (HIN), the 13% of city streets that account for more than 75% of severe and fatal injuries.

The Vision Zero Action Strategy lays out a clear path for the city towards this ambitious goal over the next three years. The strategy focuses on slowing speeds and safer crossings. More than 80 miles of our city’s High Injury Network have been upgraded or are in construction with core safety improvements. This strategy commits the City to expand the successful Quick-Build initiative to cover the remaining 80 miles in the High-Injury Network. As part of this effort, we are committed to adding daylighting and high-visibility crosswalks to every intersection along the HIN. We will also update all eligible signals to give pedestrians head-starts and more time for crossing the street. The strategy also commits us to updating our City’s Active Transportation Network, connecting car-light/car-free streets to protected bike lanes by 2024. Through these design changes, we can make walking, biking, and taking transit safer and more accessible for San Franciscans.

A page from the Vision Zero Action Strategy describing San Francisco’s plan to establish an active transportation network. Supporting mode shift is critical to achieving zero traffic fatalities. More people walking and biking on safe streets helps make it safer for everyone traveling. The City will update the Active Transportation Network to expand low-stress streets for biking and walking by 2024. This network includes low-car and car-free streets, Slow Streets, and protected bike lanes. The SF Bicycle Plan will develop a more comprehensive and long-term vision for biking in the city. The map shows a conceptual 2024 Active Transportation Network that covers the whole city, including the Great Highway to the west, Alemany and Lake Merced Boulevard to the south, JFK Drive through Golden Gate Park, Arguello Boulevard into the Presidio, the Embarcadero, and Market Street.

This strategy shows how policy change can make a significant impact in expanding our tools for safer streets. Under the recently passed AB43, which gives cities the authority to lower speed limits along certain corridors, San Francisco will begin implementing 20 mph zones along key streets as early as next year. We will also develop and implement a comprehensive speed management plan, including education and outreach to advance a culture of traffic safety. Lowering speeds by even 5 mph can make a significant difference for safety: We have seen from peer cities like Seattle that implementing 20 mph zones can decrease collisions by around 20%. We will also continue to push for policies like congestion pricing that incentivize mode shifts away from driving and toward active transportation and public transit.

A page from the Vision Zero Action Strategy that outlines San Francisco’s intention to advance a comprehensive speed management plan. Speed is the leading cause of severe and fatal crashes in San Francisco. This strategy commits the City to developing a Speed Management Plan that will not only reduce speed limits, but include complementary tools like education and outreach, high visibility enforcement, and traffic calming. The plan will also work with communities to explore alternatives to traditional traffic enforcement to ensure compliance with new speed limits. Assembly Bill 43 (Friedman) authorizes cities to set lower speed limits in business activity districts, on safety corridors, and in areas with high concentrations of pedestrians and bicyclists. This speed management plan will propose initial locations that are eligible for speed limit reductions through AB 43. The map denotes sections of the following corridors for initial speed reductions: Taraval, Noriega, Irving, 9th Avenue, Outer Balboa, Outer Clement, Inner Clement, Inner Balboa, West Portal, Ocean, Haight, Sacramento, Mission ,Geneva, 24th Street, Upper Market/Castro, Divisadero, Chestnut, Union, Fillmore, Valencia, Cortland, San Bruno, Polk, Pacific, 3rd Street, Union Square, Grant, Powell, and Columbus, Areas for future study include Hayes Valley, Mission Bay, SOMA, the Financial District, Fisherman’s Wharf, North Beach, and Chinatown. The Tenderloin is indicated as an existing 20 mph zone.

As we begin to implement the new Vision Zero Action Strategy, we are keeping equity core to our focus. The Vision Zero HIN is disproportionately concentrated in San Francisco’s communities of color, and vulnerable people—including seniors, people with disabilities, unhoused populations, and people of color—face the greatest risks from traffic-related injuries and deaths. Our Action Strategy prioritizes these communities in engagement, education, and implementation of Vision Zero programs. This past year, we rolled out 20 mph speed limits throughout the Tenderloin, where every street is on the High Injury Network. We are also focused on pursuing legislative authority for new strategies, like speed safety cameras, that are effective in reducing crashes and can reduce racial bias and disparities in enforcement.

This updated strategy commits to bold and ambitious action to get us closer to zero traffic deaths. But to achieve Vision Zero for San Francisco, we know we need the full force of comprehensive policy change, political buy-in, and community support. We need a citywide investment toward lasting, monumental change for our streets. Getting to Vision Zero will take sustained, cross-cutting, and continually innovating action. We’re committed to ending traffic deaths and reducing severe injuries in the city—and will work urgently to save lives on our streets.

 

 



Published November 19, 2021 at 03:37AM
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Thursday 18 November 2021

Wednesday 17 November 2021

Making solar energy even more sustainable with light-powered technology

Making solar energy even more sustainable with light-powered technology
Scientists have identified a new process using coordination materials that can accelerate the use of low-cost, Earth-abundant materials with the potential to transform the energy sector by replacing silicone-based solar panels.

source https://www.sciencedaily.com/releases/2021/11/211116131736.htm

A better-fitting molecular ‘belt’ for making new drugs

A better-fitting molecular ‘belt’ for making new drugs
The most common pharmaceuticals on the market are made by chaining together rings of molecules to create the drugs that treat conditions including pain, depression and leukemia. But creating those rings and forming them in a way that is tailored to each individual disease has always been a cumbersome and expensive process in medicinal chemistry. New research proposes a way to simplify that transformation. The discovery will likely make it easier to produce new drug candidates, the researchers say.

source https://www.sciencedaily.com/releases/2021/11/211116131733.htm

Toward 'off-the-shelf’ immune cell therapy for cancer

Toward 'off-the-shelf’ immune cell therapy for cancer
Immunotherapies, which harness the body's natural defenses to combat disease, have revolutionized the treatment of aggressive and deadly cancers. But often, these therapies -- especially those based on immune cells -- must be tailored to the individual patient, costing valuable time and pushing their price into the hundreds of thousands of dollars.

source https://www.sciencedaily.com/releases/2021/11/211116131731.htm

Mathematicians derive the formulas for boundary layer turbulence 100 years after the phenomenon was first formulated

Mathematicians derive the formulas for boundary layer turbulence 100 years after the phenomenon was first formulated
Turbulence makes many people uneasy or downright queasy. And it's given researchers a headache, too. Mathematicians have been trying for a century or more to understand the turbulence that arises when a flow interacts with a boundary, but a formulation has proven elusive.

source https://www.sciencedaily.com/releases/2021/11/211116131724.htm

Older-looking brains linked to lower birth weight and genes

Older-looking brains linked to lower birth weight and genes
In brain scans of almost 1500 people throughout Europe, researchers found that people with 'older-looking' brains had both lower birth weight and genes for smaller brains, compared with those with normal aging brains. Both these factors are present early in life, indicating that your 'brain age' is mostly related to early life influences and not so much on events that happen later in life.

source https://www.sciencedaily.com/releases/2021/11/211116111357.htm

The prostate cancer cell that got away

The prostate cancer cell that got away
Researchers have pioneered a new method to track the progression of prostate cancer in mice, from its birth to its spread into other tissues. This approach allows researchers to study the origins of prostate cancer in a more realistic context than traditional methods allow.

source https://www.sciencedaily.com/releases/2021/11/211116111315.htm

San Francisco's Taxi Medallion Program Moves Onward

San Francisco's Taxi Medallion Program Moves Onward
San Francisco's Taxi Medallion Program Moves Onward
By

Photo of a taxi driver assisting a passenger with a walkerIn early October, a San Francisco jury found that the SFMTA did not breach its taxi medallion program Lender Agreements with the San Francisco Federal Credit Union.  Throughout this litigation, the SFMTA has continued to focus its attention on supporting purchased medallion holders and drivers.  In fact, over a year ago, the SFMTA made an offer to settle the lawsuit by providing millions of dollars in loan forgiveness to medallion holders.  Unfortunately, the SF Credit Union opted to continue its lawsuit against us.  With the trial now behind us, we are hopeful that the Credit Union will engage in the necessary dialogue with us and agree to participate in a loan forgiveness program. 

We understand the challenges faced by individuals who purchased taxi medallions.  Specifically, the fixed $250,000 price for a medallion is unsustainable, and needs to be lowered. Unfortunately, the SF Credit Union's Lender Agreement requires the Credit Union to consent to a lower price. For more than four years, the SFMTA has been advocating that the SF Credit Union allow us to lower the medallion sales price.   It is time for the Credit Union to work collaboratively with the SFMTA on a plan to do that. 

When taxis came under SFMTA’s umbrella in 2009, the method for distributing taxi medallions (a permit to operate a cab) was dysfunctional.  Until then, the fixed number of medallions available were distributed to taxi drivers in the order that they had placed their names on a list. There was fierce opposition to adding more permits, and the existing medallions were basically held for life. As a result, drivers could wait 15 years or more for their name to rise to the top of the waiting list. Proposition K, passed by voters in 1978, established a driving requirement for medallion holders, but many drivers were not in compliance. Adding to what was becoming a dysfunctional medallion system, the industry suffered from a reputation for poor customer service with no accountability.  

To help solve these longstanding challenges, the SFMTA established a pilot taxi medallion sale program in 2010. The early years of the program successfully allowed older medallion holders to retire, with a $200,000 windfall. Revenues from medallion sales went primarily to medallion holders and drivers (approximately $110M), and another $63M received by the SFMTA was applied toward supporting transit during the aftermath of the 2008-09 recession.  

The medallion sale program also allowed younger drivers to become small business owners by purchasing and holding a highly sought-after medallion.  

Unfortunately, a new and disruptive car service model was launched during this time, which allowed companies such as Uber and Lyft to begin operating in San Francisco outside the jurisdiction of the SMFTA and taxi industry rules.  Although the California Public Utilities Commission (CPUC) ultimately asserted jurisdiction over the “ride hail” industry, the framework they established ignored San Francisco’s taxi regulations (for example, the CPUC doesn’t require fingerprint background checks for drivers and they allow prices to change throughout the day).  Launched with incentives for drivers, seemingly unlimited venture capital advantage and free of oversight, the “ride hail” industry quickly came to dominate. 

The SFMTA Taxi Services team is focused on supporting the purchased medallion holders and drivers.  Already, taxis have become increasingly competitive in the market place.  We are eager to continue our work to simplify the medallion system in support of the purchased medallion program, promote improvements in customer service and support the competitiveness of the taxi industry.   This work is all the more important as taxis recover from the tremendous impact of the COVID-19 pandemic, and we hope the Credit Union will be part of the solution. 

We look forward to working with the industry in developing these reforms before presenting them to the SFMTA Board of Directors in 2022. 

 



Published November 17, 2021 at 01:22AM
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Immune cells against COVID-19 stay high in number six months after vaccination, study shows

Immune cells against COVID-19 stay high in number six months after vaccination, study shows
A recent study provides evidence that CD4+ T lymphocytes -- immune system cells also known as helper T cells -- produced by people who received either of the two available messenger RNA (mRNA) vaccines for COVID-19 persist six months after vaccination at only slightly reduced levels from two weeks after vaccination and are at significantly higher levels than for those who are unvaccinated.

source https://www.sciencedaily.com/releases/2021/11/211116111404.htm

Microtissue system allows study of deadly lung disease

Microtissue system allows study of deadly lung disease
Amid the COVID-19 pandemic and rising air pollution levels, incidence of idiopathic pulmonary fibrosis is anticipated to rise, urgently increasing the need for strong model systems. Researchers describe a 3D cell culturing platform that allows study of lung fibroblasts and their microenvironment. The platform enables measurement of cell behaviors and microenvironment changes involved in the disease progression of IPF, and the platform's size and simplicity make it suitable for use in high-throughput drug screening protocols.

source https://www.sciencedaily.com/releases/2021/11/211116111312.htm

Electronic nose on a drone sniffs out wastewater treatment plant stink

Electronic nose on a drone sniffs out wastewater treatment plant stink
Researchers have engineered a portable electronic nose (e-nose) that's almost as sharp as a human nose at sniffing out the stink of wastewater treatment plants. Coupled with a drone, the lightweight e-nose can measure the concentration of different smells, predict odor intensity, and produce a real-time odor map of the plant for management.

source https://www.sciencedaily.com/releases/2021/11/211116111310.htm

Alluring larvae: Competition to attract fish drives species diversity among freshwater mussels

Alluring larvae: Competition to attract fish drives species diversity among freshwater mussels
North America's freshwater mussels are both impressively diverse and highly imperiled. Nearly 300 species occur in the United States and Canada, and up to 40 species of the hard-shelled bottom dwellers can be found on a single stretch of a clean, swiftly flowing river.

source https://www.sciencedaily.com/releases/2021/11/211116103156.htm

A nanoantenna for long-distance, ultra-secure communication

A nanoantenna for long-distance, ultra-secure communication
Researchers have used a nanoantenna to focus light onto a single semiconductor nanobox. This approach will enhance the utility of quantum repeater technology currently under development for advanced communication and data storage. Such technology is essential to overcoming the limitations of classical computer information for securely sharing information over long distances.

source https://www.sciencedaily.com/releases/2021/11/211116103147.htm

Malaria parasite genomes provide insights and tools for control and elimination in Lake Victoria, Kenya

Malaria parasite genomes provide insights and tools for control and elimination in Lake Victoria, Kenya
Scientists are turning to genomics to better understand the epidemiology of malaria and to inform control and elimination interventions and strategies. In the Lake Victoria region of Kenya, malaria burden remains very high despite more than a decade of intense control activities. A team of researchers generated whole Plasmodium falciparum genome sequences from the lake region. Their analyses revealed that malaria parasites from this region appear distinct from other parasites from East Africa, while frequencies of known drug resistance markers were similar to those in other East African parasite populations.

source https://www.sciencedaily.com/releases/2021/11/211116103129.htm

Market forces halved methane emissions from Uinta Basin oil and gas wells; but that’s not the whole story

Market forces halved methane emissions from Uinta Basin oil and gas wells; but that’s not the whole story
Since 2015, researchers have been tracking emissions from oil and gas wells and report that, over that time, emissions from the region have fallen by half. But more analysis of leak rates shows that the oil and gas industry has a ways to go in stopping methane leaks, which impact the climate and human health and can impose costs on Utah's economy.

source https://www.sciencedaily.com/releases/2021/11/211116103123.htm

Solar energy with an' ironclad future'

Solar energy with an' ironclad future'
Solar energy plays an important role in the fight against climate change as a substitute for fossil fuels. Dye-sensitized solar cells promise to be a low-cost supplement to the photovoltaic systems we know today. Their key feature is the dye sensitizers attached to their surface. Researchers continue to improve the performance with sensitizers using iron -- a commonly available and environmentally friendly metal.

source https://www.sciencedaily.com/releases/2021/11/211116103118.htm

Tuesday 16 November 2021

Common blood pressure drug does not slow down the progression of more advanced Alzheimer’s, study finds

Common blood pressure drug does not slow down the progression of more advanced Alzheimer’s, study finds
New research has shown the drug losartan, normally used to treat high blood pressure (hypertension), is not effective in slowing down the progression of Alzheimer's disease (AD) in people with mild-to-moderate disease after 12 months of treatment. However, the drug could still be of benefit if prescribed for longer and if given to people with very early disease.

source https://www.sciencedaily.com/releases/2021/11/211115123531.htm

COVID patients on SSRI antidepressants are less likely to die, study finds

COVID patients on SSRI antidepressants are less likely to die, study finds
A large analysis of health records from 87 health care centers across the United States found that people taking a class of antidepressants called selective serotonin reuptake inhibitors (SSRIs), particularly fluoxetine, were significantly less likely to die of COVID-19 than a matched control group.

source https://www.sciencedaily.com/releases/2021/11/211115123538.htm

Researchers target a mouse’s own cells, rather than using antibiotics, to treat pneumonia

Researchers target a mouse’s own cells, rather than using antibiotics, to treat pneumonia
Researchers have discovered a therapy that targets host cells rather than bacterial cells in treating bacterial pneumonia in rodents. The method involves white blood cells of the immune system called macrophages that eat bacteria, and a group of compounds that are naturally produced in mice and humans called epoxyeicosatrienoic acids or EETs.

source https://www.sciencedaily.com/releases/2021/11/211115123520.htm

A key brain region responds to faces similarly in infants and adults

A key brain region responds to faces similarly in infants and adults
In a functional magnetic resonance imaging study of babies ranging in age from two to nine months, researchers have found regions of the infant visual cortex that show strong preferences for either faces, bodies, or scenes, just as they do in adults.

source https://www.sciencedaily.com/releases/2021/11/211115123518.htm

Keeping chocolate milk smooth, stable without carrageenan

Keeping chocolate milk smooth, stable without carrageenan
Fat-free chocolate milk processed for the first time with high-pressure jet technology exhibits enhanced viscosity, stabilizing cocoa particles in the fluid and eliminating the need for adding a controversial emulsifier. That's the conclusion of a team of researchers, whose study suggests that the new technology can preclude the use of carrageenan in chocolate milk. The widely used food additive -- which helps keep the liquid smooth and well-mixed even after days sitting on a store shelf -- is not desired by many consumers, especially in organic chocolate milk.

source https://www.sciencedaily.com/releases/2021/11/211115123515.htm

Simple surgical technique associated with significant reduction in the risk of atrial fibrillation after cardiac surgery

Simple surgical technique associated with significant reduction in the risk of atrial fibrillation after cardiac surgery
A simple surgical technique during cardiac surgery was associated with a 56 percent reduction in the incidence of an irregular heart rhythm known as atrial fibrillation that can lead to stroke, with no added risks or side effects, according to a new study. The findings suggest that the method, called posterior left pericardiotomy, has significant potential for preventing prolonged hospital stays and the need for additional interventions and drugs to reduce the risk of strokes and heart failure associated with atrial fibrillation.

source https://www.sciencedaily.com/releases/2021/11/211115123504.htm

Altered fat metabolism, enzyme, likely plays key role in Lou Gehrig’s disease

Altered fat metabolism, enzyme, likely plays key role in Lou Gehrig’s disease
A new study using genetically engineered mice and human cell and tissue samples has added to evidence that higher levels of inflammatory chemicals involved in fat metabolism occur in people with amyotrophic lateral sclerosis (ALS), the neuromuscular disorder, also known as Lou Gehrig's disease.

source https://www.sciencedaily.com/releases/2021/11/211115123501.htm

Where does gold come from? New insights into element synthesis in the universe

Where does gold come from? New insights into element synthesis in the universe
How are chemical elements produced in our Universe? Where do heavy elements like gold and uranium come from? Using computer simulations, a research team shows that the synthesis of heavy elements is typical for certain black holes with orbiting matter accumulations, so-called accretion disks. The predicted abundance of the formed elements provides insight into which heavy elements need to be studied in future laboratories to unravel the origin of heavy elements.

source https://www.sciencedaily.com/releases/2021/11/211115123459.htm

Are scientists contaminating their own samples? New study shows we may be emitting clouds of microfibers

Are scientists contaminating their own samples? New study shows we may be emitting clouds of microfibers
More than 70% of microplastics found in samples from oceans and rivers could come from the scientists collecting them. A new article investigates procedural contamination when sampling for microparticles in aquatic environments. The study shows that a significant amount of microplastics and microfibres from scientists' clothing and gear mixes with environmental pollution in the water samples.

source https://www.sciencedaily.com/releases/2021/11/211115123448.htm

Hubble tension: Showing the cracks in Gaussian Processes

Hubble tension: Showing the cracks in Gaussian Processes
A new analysis of the Hubble constant to show that the Gaussian Processes data reconstruction technique may not actually be independent of all cosmological models -- and that it may be time to question the validity of model independence itself.

source https://www.sciencedaily.com/releases/2021/11/211115123445.htm