The AN/SPG51C continuous-wave illumination radar for surface to air missile fire control (1970s vintage) operating in the X-band (3cm... 10GHz) had a lethal range of 1125 feet. In a 3 degree beam. About 4 kilowatts I think (that figure may have been peak power of pulsed tracking beam I can't recall exactly). Most of the DDG's upper deck had to be cleared to turn it on (no big deal, that's empty at action stations, aft of the AAC just above and behind the bridge, anyway).
But I wonder what that distance would be for 1500W at 2.4GHz? What sort of beam width are we talking about -- I don't really know communications RF, just shooting rockets at things -- what's the radar cross-section of the target?
Well sure someone can teach themselves how to think, reading always helps. And I would not deny that being able to think helps you to do (not always). Sometimes you can think without doing, or do without thinking. Most times requires both IMO, but not everyone masters it.
Anyway I was commenting on the role of universities. Being taught how to generate and navigate knowledge is always longer-term useful than some specific piece of knowledge. In the context of a university teaching really specific work-related skills, they will always be out of date skills pretty quickly, as the skills required move on as technology, or the world itself, changes.
You know the old age 'give a man a fish and he eats for a day, teach him how to fish and he eats for a lifetime'? Like that.
Better they teach how to acquire skills. Plenty of people don't know how, and still don't know how after leaving university all chock-full of some particular set of skills soon to be redundant.
I think these B&O loudspeakers are just big fancy sculptures for people with too much money to spend on their hi-fi.
You can get a decent set of powered studio monitors for like USD$500. USD$1500 and you've got -great- speakers. I've got AUD$300 (approx USD$180) Acoustic Research infinite-baffle bookshelf speakers in the loungeroom and they are well loud and clear enough (with the late 1980s model Yamaha class-A amp) for recreational listening purposes. My studio's speakers are much more expensive, but their job is quite different and my expectations of them much more demanding.
Why would I want to spend EURO$8000 on a pair of speakers that are more expensive than the microphones that the most of the music I listen to was recorded on? I am also a bit suspicious of the claims mad for them as well... audiophile gear (and culture) to me seems full of ridiculous claims, and prices.
You mean I would be really neat if they made sound that wasn't affected by the room around it? How else does a microphone not record it's surroundings? If noise and room reflection are your issue, you have to change the characteristics of the room, the microphone charcteristics and placements, etc. If the room is that bad, try another room. There is very little that the microphone manufacturer can do about your room.
It's not impossibly expensive to at least get rid of the worst effects in a room. Buy some office partitions, soft furnishings etc and rig up the room so you can easily move these around until you get an acceptable sound.
"enterprise level... I wonder if Java is ready for prime time. One of our departments has to restart their Websphere environment 4 times a day to keep it running. We haven't seen those problems with our.Net deployments. "
Websphere runs more enterprise critical application installations than.Net even dreams about. If you have to restart websphere 4 times a day then obviously you have done something wrong.
And you know what? It only highlights the J2EE advantage. Don't like Websphere? Try Weblogic. Ohh Weblogic is too expensive? Install Sun One off your Solaris disks. Don't want the all-Sun lock-in? Download the free alternative JBoss. Can't figure JBoss out? Try and look at the Oracle 9i app server. Don't own any Oracle licences? Go and buy Macromedia JRun.
Now what hardware shall we deploy it on... hmmm... choice.
And so on. Your app should run on all of those, unless your app is so poorly designed it won't run on any. But that's *your* problem and converting to.Net won't make your app any less poorly architected.
Or as a previous poster said, ask management if they want to guide the company according to their business plan or according to the plan of their OS provider.
And for some, this is the kind of guidance that they are looking for.
If by 'kind of guidance' you mean letting their OS vendor planning their IT strategy... If that's what they want (ie let someone else drive it) they should get an managed services agreement with an outsourcing company and not be running their own IT.
It's a very good advice, the business plan line of query.
Also I'm not clear exactly what open source we are discussing... just operating systems? What about applications and other infrastructure?
It is possible to devise hybrid strategies in which you deploy open source application servers on proprietry OSes. JBoss on Sun is a pretty common deployment, I'd guess. I've written applications to run on that combination of infrastructure before.
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The AN/SPG51C continuous-wave illumination radar for surface to air missile fire control (1970s vintage) operating in the X-band (3cm ... 10GHz) had a lethal range of 1125 feet. In a 3 degree beam. About 4 kilowatts I think (that figure may have been peak power of pulsed tracking beam I can't recall exactly). Most of the DDG's upper deck had to be cleared to turn it on (no big deal, that's empty at action stations, aft of the AAC just above and behind the bridge, anyway).
But I wonder what that distance would be for 1500W at 2.4GHz? What sort of beam width are we talking about -- I don't really know communications RF, just shooting rockets at things -- what's the radar cross-section of the target?
SUCH A THING ALREADY EXISTS
Well sure someone can teach themselves how to think, reading always helps. And I would not deny that being able to think helps you to do (not always). Sometimes you can think without doing, or do without thinking. Most times requires both IMO, but not everyone masters it.
Anyway I was commenting on the role of universities. Being taught how to generate and navigate knowledge is always longer-term useful than some specific piece of knowledge. In the context of a university teaching really specific work-related skills, they will always be out of date skills pretty quickly, as the skills required move on as technology, or the world itself, changes.
You know the old age 'give a man a fish and he eats for a day, teach him how to fish and he eats for a lifetime'? Like that.
Better they teach how to acquire skills. Plenty of people don't know how, and still don't know how after leaving university all chock-full of some particular set of skills soon to be redundant.
Tertiary education should teach you how to think (philosophise, conceptualise, extemporise, research, theorise, plan, observe etc), not how to do.
if they are using lenses to focus the sound;
- how wide is the sweet spot?
- what is their stereo imaging like?
I think these B&O loudspeakers are just big fancy sculptures for people with too much money to spend on their hi-fi.
... audiophile gear (and culture) to me seems full of ridiculous claims, and prices.
You can get a decent set of powered studio monitors for like USD$500. USD$1500 and you've got -great- speakers. I've got AUD$300 (approx USD$180) Acoustic Research infinite-baffle bookshelf speakers in the loungeroom and they are well loud and clear enough (with the late 1980s model Yamaha class-A amp) for recreational listening purposes. My studio's speakers are much more expensive, but their job is quite different and my expectations of them much more demanding.
Why would I want to spend EURO$8000 on a pair of speakers that are more expensive than the microphones that the most of the music I listen to was recorded on? I am also a bit suspicious of the claims mad for them as well
You mean I would be really neat if they made sound that wasn't affected by the room around it? How else does a microphone not record it's surroundings? If noise and room reflection are your issue, you have to change the characteristics of the room, the microphone charcteristics and placements, etc. If the room is that bad, try another room. There is very little that the microphone manufacturer can do about your room.
It's not impossibly expensive to at least get rid of the worst effects in a room. Buy some office partitions, soft furnishings etc and rig up the room so you can easily move these around until you get an acceptable sound.
"enterprise level... I wonder if Java is ready for prime time. One of our departments has to restart their Websphere environment 4 times a day to keep it running. We haven't seen those problems with our .Net deployments. "
.Net even dreams about. If you have to restart websphere 4 times a day then obviously you have done something wrong.
... hmmm ... choice.
.Net won't make your app any less poorly architected.
Websphere runs more enterprise critical application installations than
And you know what? It only highlights the J2EE advantage. Don't like Websphere? Try Weblogic. Ohh Weblogic is too expensive? Install Sun One off your Solaris disks. Don't want the all-Sun lock-in? Download the free alternative JBoss. Can't figure JBoss out? Try and look at the Oracle 9i app server. Don't own any Oracle licences? Go and buy Macromedia JRun.
Now what hardware shall we deploy it on
And so on. Your app should run on all of those, unless your app is so poorly designed it won't run on any. But that's *your* problem and converting to
It's a very good advice, the business plan line of query.
Also I'm not clear exactly what open source we are discussing ... just operating systems? What about applications and other infrastructure?
It is possible to devise hybrid strategies in which you deploy open source application servers on proprietry OSes. JBoss on Sun is a pretty common deployment, I'd guess. I've written applications to run on that combination of infrastructure before.