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junmyeon + sehun in nyc

This supercapacitor battery can be recharged 30,000 times

A thin, flexible supercapacitor boasts high energy and power densities. Credit: University of Central Florida

Everyone and anyone with a smartphone know it is not long before your phone holds a charge for less and less time as the battery begins to degrade. But new research by scientists at the NanoScience Technology Center at the University of Central Florida (UCF), USA, could change that. The team have developed a new method for producing flexible supercapacitors that can store greater amounts of energy and can be recharged over 30,000 times without degradation. This new method could transform technology such as electric vehicles and mobile phones in the future.

‘If you were to replace the batteries with these supercapacitors, you could charge your mobile phone in a few seconds and you wouldn’t need to charge it again for over a week,’ said University of Central Florida researcher Nitin Choudhary.

The UCF team has attempted to apply newly discovered 2D materials that measure just a few atoms thick to supercapacitors. Other scientists have also tried formulations with other 2D materials including graphene, but had only limited success. The new supercapacitors are composed of millions of nanometre-thick wires coated with shells of 2D materials. The core facilitates the super-fast charging and discharging that makes supercapacitors powerful, and the 2D coating delivers the energy storage ability.

‘We developed a simple chemical synthesis approach so we can very nicely integrate the existing materials with the two-dimensional materials,’ said Yeonwoong Eric Jung, assistant professor of the study. Jung is working with UCF’s Office of Technology Transfer to patent the new process. ‘It’s not ready for commercialisation,’ Jung said. ‘But this is a proof-of-concept demonstration, and our studies show there are very high impacts for many technologies.’

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7 years ago

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Taking ‘Dronies’ with Traveler and Drone Photographer @wrenees

To see more from Renee’s travels, follow @wrenees on Instagram.

“The first time I ever saw a drone, I knew that I wanted to have one,” says Renee Lusano (@wrenees), who uses her drone to photograph vast landscapes. “Drones really appeal to me because they’re a fun toy, but also a photographic tool. And as I started to travel more, I thought a drone would be a great way to experience, capture and photograph more on each of my trips.”

A freelance designer based in Los Angeles, Renee takes advantage of her flexible schedule to travel the world, visiting far-flung places like Antarctica, Easter Island and Siberia with her friends (and sometimes with a hot dog costume). “I don’t enjoy having a routine,” she says. “The days and weeks are more memorable when I’m having new experiences.” Renee began creating @dronies — selfies with a drone — that “first show a somewhat mundane photo of myself, and then as the drone flies up, it reveals that I’m in some expansive and incredibly beautiful place. Soon, you don’t even see me — it becomes not about the selfie, but about the scale of the environment I’m in.”

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7 years ago

Throughout the Bible (our history) God says "Fear not" and that's the truth of it. Fear leads to anger, anger to hate which is a path to destruction. Don’t go down that path. The late President John F. Kennedy stated “ And so, my fellow Americans, ask not what your country can do for you -- ask what you can do for your country.” What are you doing with your talents? Again the story of the three servants that were given money from their master. The one that did nothing with it, well you know the story. Use your talents and help make today great! We are all looking forward to seeing what you do. :)

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The Koss PortaPros: One Month Later

About a month ago, I ordered the Koss PortaPro headphones from Amazon. With $50, I wondered if I could buy anything that could sound substantially better than my Beats Solo HDs. After looking at reviews on CNET, PC Magazine, and the like, I decided to go with the Koss. The PortaPros in particular are known for their audiophile status in headphone circles because of their 80s design. According to Koss, not even the design has changed, which I don’t mind. They’re a rather unique looking pair, and no one is going to confuse them for anything else.

I can say for certain that they sound as well as every review says they are. The PortaPros do not have as much bass as the Solos, but to me, that’s a plus because it’s not masking the lows, the mids, or highs. I’ve listened to Beethoven’s Symphony 9 with both these and the Beats. There really is a difference, and I know now what CNET meant by the Beats’ “muddy sound.”

I don’t claim to be an expert. CNET’s review about the PortaPro’s sound quality is much better than my own analysis, and yet, how comfortable have they been in the month that I’ve had them? It’s takes a little time since the headphones adjust via a fully exposed collapsible steel band. They’re designed so that they fit exactly against the head.

The PortaPros can be adjusted the most spacious setting, which prevents them from collapsing before the user puts them from their head. I found this useful for placing them around the neck when I wasn’t listening to music because the metal band does bite into the neck if it’s not fit properly. However, I don’t find this cumbersome at all.

I’d recommend to not place the earpads directly on the ears when wearing these. Doing so will not affect the sound quality at all, and depending on the individual, this adjustment is anywhere from a millimeter to a centimeter or so. Sometimes, the earpads press too hard on the ear because of the pressure the metal band exerts, but this can be alleviated by the method above or by the comfortZone setting just below the band.

One month later, I can say that I definitely recommend these. They have a learning curve, but it should only take a day or two to get accustomed to its design. The biggest knock on the Koss PortaPros is not sound quality (not by a long shot) but comfort due to its design. Even so, I’d fine the comfort to be better than my $200 Beats Solo HDs. My rating for that is a 3 out of 5, and my overall rating is a 4.25. If you don’t mind the learning curve and the open design, buy these. You won’t regret it - especially since it has a lifetime warranty.

Rating Breakdown:

Sound: 5/5

Design: 4/5

Comfort: 3/5

Customer Service: 5/5

Overall: 4.25/5

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7 years ago

Too much Black Friday/Cyber Monday/Cyber Week?

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