On 10/17/07, David Joyner <[EMAIL PROTECTED]> wrote: > > (1), this works fine on the public notebooks. I just tried > > and it worked without any trouble. See > > https://sage.math.washington.edu:8103/home/pub/1493/ > > There is something about worksheets which I don't understand. > When I copy and paste the code in your worksheet linked above > into my old worksheet which had the error message, the problem > re-occurred. When I copy and paste the code in your worksheet > into a new worksheet, it disappeared. > It seems to me that this should not happen, but maybe that it > indended behavior.
That doesn't make any sense. I don't understand that at all either. > > > > > > (2) Having a class actually depend in a fundamental way > > on the public notebook servers that I make available is > > a very bad idea. I must emphasize that I reserve the right > > to -- possibly permanently -- take them down at any time. > > > Well understood, and I have explained that to some of them. > I've only heard of 4 or 5 students attempting the online version > but based on limited experience most prefer to have the > program loaded on their machine (which surprised me). It's slow to use sagenb.org, when sage.math is heavily loaded (which is often), and one is using it from across the country. > > One issue is that, as has been discussed here before, there > > are numerous security issues, and at some point people will > > use the public notebook in a way that will require their complete > > removal permanently. For example, if spammers / p0rnographers > > found out about them, they could just post bad content to them > > and use them as an advertising portal or something -- there is > > no way to prevent this short of not giving out accounts and/or > > creating a spam filtering system (which would take quite a while). > > Another issue is simple usage. The sage notebooks currently > > run on a machine that's mainly devoted to research (sage.math) > > and sage development. Unfortunately when the public notebooks > > become too popular -- which will happen at some point -- they will > > start to use all the resources of that machine, and I will have to > > turn the notebooks off, because that machine is needed for other > > computations. (This might be an issue, if I'm able to get new > > hardware before this happens...) > > > > Anyway, there are numerous reasons why having classes depend on the > > public sage notebook server at UW isn't recommended at present. > > The public sage notebooks could be a service like Google mail or maps > > or something, if there were a lot of money available to support a person > > or people to maintain it along with money for sufficient hardware, etc. > > > > Is it possible you could give students a shell account on a machine > > at USNA, at least? > > > Okay, I'll work a little harder on that and also encourage the students to > use the downloaded version. > Thanks. Sorry that I'm not able to provide services like a dot-com, but I'm just not that. William --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~----------~----~----~----~------~----~------~--~---
