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Hemp Fibers Make Better Supercapacitors Than Graphene

russejl suitable for home use? (178 comments)

This is potentially exciting... no pun intended :-)

The article abstract says:
The nanosheets are ideally suited for low (down to 0 C) through high (100 C) temperature ionic-liquid-based supercapacitor applications: At 0 C and a current density of 10 A g–1, the electrode maintains a remarkable capacitance of 106 F g–1. At 20, 60, and 100 C and an extreme current density of 100 A g–1, there is excellent capacitance retention (72–92%) with the specific capacitances being 113, 144, and 142 F g–1, respectively. These characteristics favorably place the materials on a Ragone chart providing among the best power–energy characteristics (on an active mass normalized basis) ever reported for an electrochemical capacitor: At a very high power density of 20 kW kg–1 and 20, 60, and 100 C, the energy densities are 19, 34, and 40 Wh kg–1, respectively. "

Which possibly suggests that the materials are suitable for indoor use (but not in cars unless you happen to operate in a non-freezing climate) which could have some very practical applications. Solar panels are becoming attractive and I'd like a storage bank but would like to avoid batteries because of the slow charge, expense, and maintenance. A super capacitor, of course, is attractive. Off the top of my head, I don't know what the power density of this type of capacitor is relative to lead acid deep cycle batteries. Still, I smile though :)

about 3 months ago
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French Parliament Votes To Give Priority To Free Software

russejl Re:"Free Software" is NOT enough, F/LOSS is needed (98 comments)

I think I'm deviating from the thread but while I personally love & admire FOSS I think that the law is discriminatory toward non-free software which might offer a worthy product albeit lack of source code is disappointing. It'd be better to see them put FOSS at an equal footing with closed/proprietary. That's my idealistic thinking anyhow.

about a year ago
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Microsoft Windows, On a Mainframe

russejl One question: (422 comments)

Why!??

more than 5 years ago
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Linux Growth Doesn't Offset NetWare Decline

russejl training, poor compatibility, and instability (165 comments)

My company has been a Novell shop for long time and is finally giving in to Active Directory. :(

But here's my take on it. Maybe somebody at Novell will read this. The admins seem to be afraid to learn UNIX... So I am assuming that Novell charges for the training, the testing, etc. Now our admins, they get Winders but they really don't get Linux or UNIX. I think it would have been in Novell's best interest to eat the cost for training, especially to those who have already gotten their CNA or CNE in older Netware products. I think FUD and discomfort are major factors in hindering old Netware shops from going to Novell Linux.

Another issue that my company seems to hate about Netware (ver. 6.5) is its poor compatibility with Enterprise software and hardware. Netware clustering doesn't play well with Netbackup (it works, but it's very clunky). It also doesn't do well with SAN stuff... I really don't know what the issues are, but I've heard that expressed on more than one occasion. We do some Heirarchal Storage Management (HSM) (HSM essentially is a user transparent file archiving mechanism) which also is pretty klunky, esp. with Netbackup, etc. I have no idea if the Novell Linux works around these issues, but the FUD and discomfort of going to Linux don't help.

Netware 6.5 isn't all that stable. The servers ABEND fairly often. IMHO, they should have gotten off the DOS base a long time ago. I guess if we were running "workgroup" class Netware systems with less "enterprise" features, they'd be a bit more stable, but Netware needs work fairly well in a mid-level enterprise environment if it wants any real respect in from IT departments.

The old IBM adage, "No one ever got fired for buying IBM," seems to apply now to Microsoft.

But the training is probably the best thing they can do to keep the momentum. I think SUSE, although I haven't used it in a long time, and Linux in general, can and does operate well at the enterprise level, but for non UNIX people, it takes a lot of faith to trust in it.

But that's my two cents.

-Jim

more than 8 years ago

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