Time to Adjust: Changes to the 2016 NFPA 72

Excerpted from page 94 of Electrical Contractor Magazine. 

The Mystery of the Flickering Star

This development was just too cool to pass up. Recently, professional and citizen scientists in the Planet Hunter program using the Kepler Space Telescope picked up on a bizarre occurrence - a flickering star.  Located around 1,500 light years away, the star has been labeled KIC 8462852. Out of the approximately 150,000 stars that the telescope observes, this one star is somehow displaying unusual, irregular flashes light.

Theories as to what may have caused this phenomenon are varied. An astronomer at Yale University, Tabetha Boyajian, wrote that " the scenario most consistent with the data in hand is the passage of a family of exocomet fragments, all of which are associated with a single previous breakup event."

Others brought up the possibility that this event could be a confirmation of alien life, exploring that "the mysterious dips in light were due to massive structures built around the star by an advanced civilization."

Who really knows? The Kepler Space telescope was damaged in 2013 so researchers have less data to work with and unfortunately will have a hard time figuring out just what is happening 1,500 light years away.

Read more here: http://abcnews.go.com/Technology/kepler-space-telescope-mysterious-objects-raise-questions-bizarre/story?id=34494182
Tabetha Boyajian's Report in the Monthly Notes of the Royals Astronomical Society: http://arxiv.org/pdf/1509.03622v1.pdf

How portobello mushrooms are going to replace graphite in batteries.

"Can portabella mushrooms stop cell phone batteries from degrading over time?

Researchers at the University of California, Riverside Bourns College of Engineering think so.

They have created a new type of lithium-ion battery anode using portabella mushrooms, which are inexpensive, environmentally friendly and easy to produce. The current industry standard for rechargeable lithium-ion battery anodes is synthetic graphite, which comes with a high cost of manufacturing because it requires tedious purification and preparation processes that are also harmful to the environment.

With the anticipated increase in batteries needed for electric vehicles and electronics, a cheaper and sustainable source to replace graphite is needed. Using biomass, a biological material from living or recently living organisms, as a replacement for graphite, has drawn recent attention because of its high carbon content, low cost and environmental friendliness.

Diagram showing how mushrooms are turned into a material for battery anodes.

UC Riverside engineers were drawn to using mushrooms as a form of biomass because past research has established they are highly porous, meaning they have a lot of small spaces for liquid or air to pass through. That porosity is important for batteries because it creates more space for the storage and transfer of energy, a critical component to improving battery performance.

In addition, the high potassium salt concentration in mushrooms allows for increased electrolyte-active material over time by activating more pores, gradually increasing its capacity.

A conventional anode allows lithium to fully access most of the material during the first few cycles and capacity fades from electrode damage occurs from that point on. The mushroom carbon anode technology could, with optimization, replace graphite anodes. It also provides a binderless and current-collector free approach to anode fabrication.

“With battery materials like this, future cell phones may see an increase in run time after many uses, rather than a decrease, due to apparent activation of blind pores within the carbon architectures as the cell charges and discharges over time,” said Brennan Campbell, a graduate student in the Materials Science and Engineering program at UC Riverside.

The research findings were outlined in a paper, “Bio-Derived, Binderless, Hierarchically Porous Carbon Anodes for Li-ion Batteries,” published today (Sept. 29) in the journal Nature Scientific Reports. It was authored by Cengiz Ozkan and Mihri Ozkan, both professors in the Bourns College of Engineering, and three of their current or former graduate students: Campbell, Robert Ionescu and Zachary Favors.

Nanocarbon architectures derived from biological materials such as mushrooms can be considered a green and sustainable alternative to graphite-based anodes, said Cengiz Ozkan, a professor of mechanical engineering and materials science and engineering.

The nano-ribbon-like architectures transform upon heat treatment into an interconnected porous network architecture which is important for battery electrodes because such architectures possess a very large surface area for the storage of energy, a critical component to improving battery performance.

One of the problems with conventional carbons, such as graphite, is that they are typically prepared with chemicals such as acids and activated by bases that are not environmentally friendly, said Mihri Ozkan, a professor of electrical and computer engineering. Therefore, the UC Riverside team is focused on naturally-derived carbons, such as the skin of the caps of portabella mushrooms, for making batteries.

It is expected that nearly 900,000 tons of natural raw graphite would be needed for anode fabrication for nearly six million electric vehicle forecast to be built by 2020. This requires that the graphite be treated with harsh chemicals, including hydrofluoric and sulfuric acids, a process that creates large quantities of hazardous waste. The European Union projects this process will be unsustainable in the future.

The Ozkan’s research is supported by the University of California, Riverside.

This paper involving mushrooms is published just over a year after the Ozkan’s labs developed a lithium-ion battery anode based on nanosilicon via beach sand as the natural raw material. Ozkan’s team is currently working on the development of pouch prototype batteries based on nanosilicon anodes.

The UCR Office of Technology Commercialization has filed patents for the inventions above."

Source: http://www.upworthy.com/what-do-portobello-mushrooms-have-to-do-with-better-batteries-everything?c=utw1&utm_content=buffer4bdcf&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer