Nationals players believe extended safety netting is a ‘no-brainer’

It’s happened across sports in different fashion. An issue is discussed or dismissed until a troubling incident is brought to life via video in front of everyone’s eyes.That breaking point on extended netting arrived for Major League Baseball after Chicago Cubs outfielder Albert Almora Jr. pulled a line drive into the stands May 29. The ball struck a four-year-old girl. But, it was Almora’s reaction, as much as anything, which made the reality so stark. He was stunned and moved to tears. The player’s reaction amplified the incident to a level which forced something to be done. Steps will be taken at Nationals Park to prevent such an incident. The team announced Thursday it will extend the protective netting up the foul line during the All-Star break. It will end just short of the foul poles. Washington has a good window to complete the work because it goes on the road following the All-Star break. The Nationals’ final pre-break home game is July 7. They don’t return to Nationals Park until July 22. “As players, it’s something that we’ve pushed for and advocated for years now,” Sean Doolittle said. “I think as you see exit velocities that have continued to increase an...

Shaving surfaces and time, these cordless sanders will give you the freedom to get those long overdue

Shaving surfaces and time, these cordless sanders will give you the freedom to get those long overdue jobs done Electric sanders have been around for donkey’s years and have saved legions of DIY enthusiasts from the misery and tedium of hand-sanding large surfaces. Today’s new generation of cordless lithium-ion powered sanders means you can happily sand away in a shed without the need to hook up to a power supply. Cableless working also means greater freedom and movement when sanding away at your chosen project, and negates the chances of snaring yourself amongst trailing electrical cables. Sanders come in many different guises: random orbital sanders provide oscillation and rotation and can often run at slow speeds for use as polishers when combined with a suitably soft buffing attachment. Palm or mouse sanders (not for actually sanding mice, of course) are commonly aimed at the DIY market and are designed for light sanding work around the home. Belt sanders – big, gutsy beasts for shifting material at speed – are a rarity in the realms of the cordless power tool as they require stacks of power to operate effectively. There are also smaller, pistol gripped sanders on the market...

EPA’s Free Pass for Oil and Gas: Another Climate Surrender

The Natural Resources Defense Council works to safeguard the earth – its people, its plants and animals, and the natural systems on which all life depends. Climate change is already causing unprecedented heatwaves, droughts, wildfires, storms, and floods. Today, Hurricane Dorian is barreling down on Florida, and the Amazon, Alaska, and Siberia are on fire. And the world’s climate scientists are telling us it will only get worse unless we cut our net emissions of all heat-trapping pollutants to zero by the middle of this century.  Instead, the Trump EPA is doing all it can to let every major climate-polluting industry off scot-free.  Andy Wheeler, the former fossil-fuel lobbyist running Trump’s EPA, today proposed to let the oil and gas industry keep leaking hundreds of thousands of tons of methane from its operations across the country. Methane is an extremely powerful climate pollutant, and the oil and gas sector is its biggest industrial source. Together with EPA’s better-known rollbacks on power plants and cars, today’s proposal marks another retreat in the battle to prevent climate catastrophe.  EPA’s acting clean air chief told the Wall Street Journal: “I don’t...

Highly uniform and low hysteresis pressure sensor to increase practical applicability — ScienceDaily

Researchers have designed a flexible pressure sensor that is expected to have a much wider applicability. A KAIST research team fabricated a piezoresistive pressure sensor of high uniformity with low hysteresis by chemically grafting a conductive polymer onto a porous elastomer template. The team discovered that the uniformity of pore size and shape is directly related to the uniformity of the sensor. The team noted that by increasing pore size and shape variability, the variability of the sensor characteristics also increases. Researchers led by Professor Steve Park from the Department of Materials Science and Engineering confirmed that compared to other sensors composed of randomly sized and shaped pores, which had a coefficient of variation in relative resistance change of 69.65%, their newly developed sensor exhibited much higher uniformity with a coefficient of variation of 2.43%. This study was reported in Small as the cover article on August 16. Flexible pressure sensors have been actively researched and widely applied in electronic equipment such as touch screens, robots, wearable healthcare devices, electronic skin, and human-machine interfaces. In particular, piezoresi...

Sustainable Roofing Buyers’ Guide | Earth911.com Sustainable Roofing Buyers’ Guide

For most people, buying a new roof is one of the most important and expensive maintenance decisions for their biggest investment. For many homeowners, the cheapest option is always the default choice while others choose a style they like and leave the details to a contractor. It’s not always easy to find out who makes your roofing material. It can be even harder to find out if they recycle or work to minimize their environmental impact. But the impact of our roofing choices, both on our homes and on the environment, is too great to ignore. We’ve researched roofing materials and manufacturers to make buying an eco-friendly roof easier. Our results are far from comprehensive, but as more consumers begin to demand this information, more manufacturers will begin to provide it. When they do, we’ll update our sustainable roofing results. In this article, we consider the merits of the most common manufactured roofing materials. Natural roofing materials are not manufactured, so they are not included in the comparison chart. Asphalt is the cheapest option. It is so common that many people assume you are talking about asphalt shingles when you talk about roofing. Laminate shingles (also ...

Ceramic–metal composites for heat exchangers in concentrated solar power plants

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. The efficiency of generating electricity from heat using concentrated solar power plants (which use mirrors or lenses to concentrate sunlight in order to drive heat engines, usually involving turbines) may be appreciably increased by operating with higher turbine inlet temperatures, but this would require improved heat exchanger materials. By operating turbines with inlet temperatures above 1,023 kelvin using closed-cycle high-pressure supercritical carbon dioxide (sCO2) recompression cycles, instead of using conventional (such as subcritical steam Rankine) cycles with inlet temperatures below 823 kelvin1,2,3, the relative heat-to-electricity conversion efficiency may be increased by more than 20 per cent. The resulting reduction in the cost of dispatchable electricity from concentrated solar power plants (coupled with thermal energy storage4,5,6) wou...

Global Asphalt Shingles Market demand to cross $9.5bn by 2025: Global Market Insights, Inc.

UK dimensional asphalt shingles market share is expected to exceed over 5.35 million square meters consumption up to 2025. Strict regulatory framework by EU regarding green & sustainable construction activities will boost the demand for organic asphalt mat-based shingles. Their aesthetic characteristics such as light weight, and ability to withstand damp conditions will boost asphalt shingles market share. The proportion of population living in semi-detached houses is highest that is over 60% in UK among EU member states indicates higher number of detached and semi-detached housing structures in the country thereby driving the demand for asphalt shingles as a roofing material. Asphalt Shingles Market size is forecast to hit USD 9.5 billion by 2025, according to a 2019 Global Market Insights, Inc. research report. Rise in urban population owing to population shift from villages & towns to metropolitans will boost the market for asphalt shingles in roofing applications owing to their durability and waterproofing characteristics which will foster market growth. Asphalt shingles market size from residential applications may witness significant gains at over 3% by 2025. Rise ...