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From: Orchid XP v8
Subject: Re: Dr SQL
Date: 22 Feb 2009 07:59:05
Message: <49a14c19$1@news.povray.org>
>>>> I wandered into lots of terms like "universal quantification" and 
>>>> got horribly lost...
>>>
>>> You should look up "universal quantification" and "existential 
>>> quantification" on wikipedia.
>>
>> I've already done this several times. I still don't comprehend. 
> 
> What exactly is the problem? Other than that the upside down E and A are 
> not part of the ascii character set?

I don't know. I would imagine I'm looking at one specific technical 
term, and I'm therefore not seeing the entire background context that 
goes with it, so it doesn't make much sense. Something like that.

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*


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From: Orchid XP v8
Subject: Re: Dr POV-Ray
Date: 22 Feb 2009 08:00:00
Message: <49a14c50$1@news.povray.org>
>> Yes, but... having a BSc already says all those things. I spent 4 years
>> of my life studying for it, I learned all sorts of stuff, and in the end
>> I did actually get my BSc. And yet, nobody gives a **** about that. How
>> is a PhD different?
> 
> How is a PhD different?!?
> 
> A PhD is *entirely* different from a BSc.  

> They are different.  Very different.

Agreed.

> And employers will recognize the difference.

This is the part I'm dubious about.

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*


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From: triple r
Subject: Re: Dr POV-Ray
Date: 22 Feb 2009 08:50:01
Message: <web.49a157a2ce2515f163a1b7c30@news.povray.org>
Orchid XP v8 <voi### [at] devnull> wrote:
> > They are different.  Very different.
>
> Agreed.
>
> > And employers will recognize the difference.
>
> This is the part I'm dubious about.

Then I don't understand.  Employers (both the people doing the hiring and the
people doing the thinking) obviously look for *something*.  I think we can all
agree on that.  Then the question is what.  Experience?  Certainly.
Communication and interpersonal skills?  Without a doubt.  Knowledge or
specific skills?  Yes, or maybe slightly less as long as you can learn.  It
seems to me (and I can only answer from my understanding, not personal
experience) that a PhD shows all of these qualities.

Is the point of contention that you might not have exactly the right specific
skill?  I believe Mr. New said that he learned a new programming language in
almost all of his jobs.  Even if they don't have to take it on faith that you
can learn, then shouldn't the fact that your research was funded indicate that
someone out there is willing to pay for what you have?

 - Ricky


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From: Mueen Nawaz
Subject: Re: Dr POV-Ray
Date: 22 Feb 2009 10:45:56
Message: <49a17334$1@news.povray.org>
Orchid XP v8 wrote:
>> And employers will recognize the difference.
> 
> This is the part I'm dubious about.

	Don't know about UK, but there are quite a number of jobs in the US
that require at least an MSc. And if it's research, they almost always
require a PhD.

	In electrical engineering jobs, it's almost a given that you won't be
part of product design unless you have the MSc.

	So of course, some employers recognize the difference.

-- 
On a clear disk you can seek forever.


                    /\  /\               /\  /
                   /  \/  \ u e e n     /  \/  a w a z
                       >>>>>>mue### [at] nawazorg<<<<<<
                                   anl


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From: triple r
Subject: Re: Dr POV-Ray
Date: 22 Feb 2009 10:55:00
Message: <web.49a1747fce2515f163a1b7c30@news.povray.org>
Stephen <mcavoysAT@aolDOTcom> wrote:
> True but not a lot. I believe that introspection is bad for you, I also believe
> that analysis, public displays of grief and talking about your (not aimed at
> you) feelings are amongst the worst things that you can do for your mental
> health.

Ignorance is bliss?

> <Sits back and waits for the avalanche>

No avalanche, just curious.

 - Ricky


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From: Darren New
Subject: Re: Dr SQL
Date: 22 Feb 2009 12:32:35
Message: <49a18c33$1@news.povray.org>
Orchid XP v8 wrote:
> I've already done this several times. I still don't comprehend.

OK, you understand boolean "and" and boolean "or", right? This is called 
"propositional logic":

   If it rains, the street is wet.
   It is raining.
   Therefore the street is wet.
That's propositional logic.

Go the next step, and you get first order predicate logic:
   All ravens are black.
   My bird is a raven.
   Therefore my bird is black.

The "all X are Y" is universal quantification.

If you have "some X is Y", that's existential quantification. Usually it's 
part of an expression involving universal quantification, like
   "for all integers X, there exists a integer Y such that
      if X is prime then Y is prime and Y > X."
That's just saying there's no biggest prime. No matter what
number we pick, if it's prime, there's some other number that's
also prime and larger. (It's not a proof, just a statement of
a boolean value. Proving the boolean is true is a separate step.)

Note also that the result is *one* boolean value. It's either true for all 
X, or it isn't.

There are, of course, standard rules of deduction, like
   "for all X, pred(X)"
is the same as
   "not for some X, not pred(X)"
and so on.



You might be getting stuck by reading too low in the explanation stack. Try
http://en.wikipedia.org/wiki/First_order_predicate_logic



-- 
   Darren New, San Diego CA, USA (PST)
   My fortune cookie said, "You will soon be
   unable to read this, even at arm's length."


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From: Darren New
Subject: Re: Dr POV-Ray
Date: 22 Feb 2009 12:41:18
Message: <49a18e3e$1@news.povray.org>
Orchid XP v8 wrote:
> I guess it's just that I've spent my entire life surrounded by people 
> telling me how stupid I am, 

They're wrong. All my teachers thought I was crap too. I was just bored for 
the most part, and uninterested.

>> Know what? My wife has a PhD too. Know where I met her?
> Heh. What do you have a PhD *in* though?

Both our PhDs were in computers.

> I rather doubt there are many females who have a PhD in anything 
> remotely related to computing. 

In my university, it seemed pretty close to even, IIRC. At least in the PhD 
program.

> Like I say, I couldn't figure out the application process. Maybe because 
> I don't have a clear idea of how this stuff is supposed to work...

Oh. You mean, you were blocked by HR? That's not unusual.

> That's pretty impressive... I've spent years writting silly scraps of 
> text, but I've never yet managed to write "a paper".

Did you ever take an intensive 3-year class in "how to write a technical 
paper destined for an academic journal" taught one-on-one by someone who 
does that regularly for a living? :-)

>> It's not "no apparently reason."  Think of it like taking a job doing 
>> something fun, for not quite as much money as you might like, but 
>> probably still more than you're making now. :-)
> 
> Well, if you put it like that... ;-)

I'm serious. Don't look at it as a destination. You want to get out of where 
you are, so think of the PhD as a place to go, have fun, meet people, and do 
exciting stuff. It doesn't matter if you finish or not, any more than 
running a marathon is about whether you come in first.

> I think spending all day in a brand new, possibly hostile environment is 
> quite enough to be dealing with, without living in a completely random 
> country on top of all that. (Quite apart from the fact that I have no 
> desire to leave the UK in the first place.)

That's fair.  Part of the fun is living in a different country, mind. (Not 
that I did, but ...)   I can completely understand if it isn't fun, tho. Do 
take advantage of the fact that you speak one of the languages that ran 
rampant all over the world not too long ago, so you can get by language-wise 
pretty much anywhere. China was the only place I've been that people 
generally didn't know enough English to get by.

-- 
   Darren New, San Diego CA, USA (PST)
   My fortune cookie said, "You will soon be
   unable to read this, even at arm's length."


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From: Darren New
Subject: Re: Dr POV-Ray
Date: 22 Feb 2009 12:43:34
Message: <49a18ec6$1@news.povray.org>
Orchid XP v8 wrote:
> I did actually get my BSc. And yet, nobody gives a **** about that. How 
> is a PhD different?

What's the difference between being a sailor in the navy and the captain of 
the ship?  In one, you're swabbing the decks when the captain tells you to. 
In the other, you're responsible for making sure the ship gets where it's going.

-- 
   Darren New, San Diego CA, USA (PST)
   My fortune cookie said, "You will soon be
   unable to read this, even at arm's length."


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From: Jim Henderson
Subject: Re: Dr POV-Ray
Date: 22 Feb 2009 12:57:25
Message: <49a19205$1@news.povray.org>
On Sun, 22 Feb 2009 10:01:47 +0000, Orchid XP v8 wrote:

> Jim Henderson wrote:
> 
>> My brother and I used to fall asleep listening to episodes of the radio
>> series, and we'd quiz each other on the finer details.  Clearly I've
>> lost my touch a little bit. ;-)
> 
> You think *that* is bad?! I used to be able to sleep properly...

Heh, I've never been able to sleep properly.  Better now than it used to 
be, but still pretty restless.

Jim


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From: Nicolas Alvarez
Subject: Re: Dr POV-Ray
Date: 22 Feb 2009 13:05:19
Message: <49a193df@news.povray.org>
scott wrote:
> Now, is it possible to do a search using SQL that does something like
> this: Find all the times that an experiment has gone over temperature
> while switched on (ie after a switched on event but not after a switched
> off
> event)?  This is beyond my basic knowledge how I would do such a thing
> without writing some code to manually search the results and checking
> times.

I know enough about SQL to be able to get a complete list of students
(including their phone numbers and course marks) from a supposedly
important university in my area, through the SQL injection bug a friend
found, but your question goes beyond my knowledge too.

It would be easier if you had a "switched on" column on each temperature
event, saying if at that event the...thing was on or off.


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