The h Bar

2017

17:00

There might have been flags before that too

Or maybe not

I don't know :/

83

Q: How was this answer posted after this question was closed?

Question: lot of .exe folders are created on my windows7 Answer: try that... The question was closed at 11:57:57 (according to the hover-over-"x-mins-ago" bar) and the answer was posted at 12:16:35. It's a fairly lengthy answer, so it's possible that it was started to be written before it was c...

Yashas Samaga

It has the "status-bydesign" tag :O

2017

However, this is only a client-side restriction, so it is possible in some cases that this process fails.

For users answering from a mobile device, there's no client-side restriction in place to begin with, so this situation is presumably even easier to create when using the mobile version of the site.

(Maybe they answered using the mobile app and started writing it before getting duped)

D3075

@DanielSank sorry was afk, and I don't remember but I did beat it several times.

0celo7

Daniel Son; Necklace Don

Daniel Son; Necklace Don is a mixtape by American rapper 2 Chainz. It was released on August 5, 2016 independently by 2 Chainz. The project consists of ten tracks, with guest appearances from Drake and YFN Lucci, with production from TM88, C4, Dun Deal, DJ Spinz, Bobby Kritical, K Swisha, Mr. 2-17, Southside, and Buddah Bless. == Critical reception == Daniel Son; Necklace Don received mixed reviews, with XXL Magazine giving the mixtape a 3 out of 5 stars. == Track listing == == References == == External links == Official download on DatPiff...

@DanielSank ^reminds me of you

Yashas Samaga

@JohnRennie Has there ever been a time when you hit the 200 max reputation limit in a day without answering any question?

John Rennie

17:09

No, or at least I don't think so.

I get a steady trickle of upvotes from old answers but I'd guess it averages out at 3-5 upvotes a day. Far short of the limit anyway.

Yashas Samaga

As the number of questions a person has answered well increases, there might be a point where the answerer earns the reputation for doing nothing. People might bump into one of the answer and upvote it.

So the people with high reputation and a lot of answers will become more richer (reputation-wise)?

lol

John Rennie

Kind of like real life then :-)

Yashas Samaga

yea :D

John Rennie

In a way I would prefer it if reputation decayed exponentially.

2

That way your rep would be a good guide to your current prowess. As it is you get people with massive reps who just live of past glories - a bit like me :-)

Yashas Samaga

So this is a flaw in the SE system.

DanielSank

17:13

@JohnRennie wat? Why?

My ability to use my site privileges for awesome doesn't decay exponentially does it?

ACuriousMind

@JohnRennie Uh, it at least already gets exponentially more useless the more you have :P

DanielSank

I mean, maybe it does...

What kind of time constant do you have in mind?

John Rennie

@DanielSank half life of a year.

DanielSank

@ACuriousMind Yeah, which is probably good.

@JohnRennie Hmm, you know... perhaps having both numbers would be interesting.

ACuriousMind

@DanielSank Yep, it's not a bad thing

John Rennie

17:15

It would take some thinking through. Ideally the privileges you get wouldn't change and you wouldn't lose the upvotes. It's just that the rep from each vote decays with time.

ACuriousMind

@YashasSamaga I'm not really sure why this is a flaw: People who produce a lot of good content get a lot of rep - where's the flaw?

Slereah

JD gets a lot of good rep

ACuriousMind

There are several flaws with the rep system in my view, but that you can get rep from old posts is not one of them

Yashas Samaga

@ACuriousMind If a time comes when you get 200 rep daily just becaz of the old answers, then that would discourage the user from making new posts. As more people enter that group, the new users will find it extremely difficult to compete.

John Rennie

Look what I've just found at the bottom of a drawer:

Yashas Samaga

17:19

I believe that if an answer has 50 upvotes, at least 10 of them are from people who never read the answer.

It is just a belief which could be wrong.

ACuriousMind

@YashasSamaga The top SO users are exactly in that situation, yet SO does not appear to be stagnating.

Yashas Samaga

After reading a research paper on herd-like behaviour of humans, I have started speculating too much I think :p

John Rennie

2

Slereah

Maybe the problem is that you think Stack exchange is a competition

John Rennie

Me in 1985 in my motorbiking days. I think that was in the Alps somewhere.

ACuriousMind

17:21

Jon Skeet gets 200 rep a day, every day, and is still writing new answers. If you have posted so much that you get 200 rep on old posts alone, I think it is evident you're not actually doing it for the points.

Yashas Samaga

SO is ruled by Jhon, PSE is also ruled by a John :D

ACuriousMind

@JohnRennie is...is that you?

Yashas Samaga

I was wondering the same

John Rennie

You think that's bad, look at this one!

ACuriousMind

What on earth is a "Furener Knupp"?

@JohnRennie It's not bad, it is...authentic. That's pretty much how I imagined you when you said you rode motorcycles :P

John Rennie

17:24

2

Yashas Samaga

@JohnRennie is your profile pic photoshopped?

John Rennie

Who is that young git? !!!

Yashas Samaga

or do you really have that awesome beard?

John Rennie

@YashasSamaga no the profile picture really is me, though that was 20 years ago and I've shaved the beard off since.

Yashas Samaga

aw you look handsom with the beard

I am not saying that you look ugly without the beard

D3075

17:26

lmao

John Rennie

And just to prove that motorbikes really were involved :-)
Mercifully the picture is too low resolution to show me in any detail.

DanielSank

@ACuriousMind I think it's good to require some level of content creation as prerequisite to privileges, but after a point rep is just a measure of how much time a good user spends on the site.

Yashas Samaga

What on earth does this mean "Can we fully describe a sine wave as a form of uniform increase in acceleration?"?

Slereah

Well no

2017

@JohnRennie Ah!!! You look really nerdy (and a bit stylish :P) in that picture :D

@JohnRennie This is cute :P

John Rennie

17:38

Only my mother thinks I'm cute :-)

2017

I'm not your mother and still feel that you are a cute old gentleman :D @JohnRennie BTW I guess it is time for a new profile picture now :)

Yashas Samaga

@JohnRennie With all this handsomeness, how did you manage to stay unmarried?

2017

@JohnRennie Great scenery there :)

@YashasSamaga Na na...I am sure he had multiple girlfriends :D

Being a bachelor was a choice :D

Yashas Samaga

Aha! That's the reason.

xD

John Rennie

@2017 It was on the Luxembourg Germany border.

DanielSank

17:47

@JohnRennie what about your so?

vzn

somebody posted a pic awhile back of fonda or hopper in this movie, easy rider, cant find it again. has anyone seen it? legendary in US. imdb.com/title/tt0064276

Emilio Pisanty

0

Q: Potential wells in nanostructures

When do finite potential wells form and when do infinite potential wells form?

quantum-mechanics potential nanoscience

opinions?

because I can't even

Yashas Samaga

I actually flagged it for close

vzn

easy rider movie seems like it might have been loosely inspired by this legendary book also semifamous, on the road by kerouac en.wikipedia.org/wiki/On_the_Road

Yashas Samaga

the question appears as if the author did not show any research effort

Emilio Pisanty

17:55

@YashasSamaga for which reason, though?

Yashas Samaga

it also looks like a homework question

but I think I am going over the line here by flagging too many questions as homework questions

DanielSank

@EmilioPisanty sup?

Emilio Pisanty

@DanielSank nothing much, leaving in a bit

just came online to buy my Rogue One tickets, and I'm off to see it in a min

so there

see y'all after some starwars

2017

Eh, Rogue One still running in theaters ?

Wasn't it released in 2016 ?

Yashas Samaga

You watch movies? :o

2017

18:03

Obvio

you don't?

heather

hello

@DanielSank article class? twocolumn? okay

oh, and the sectioning link, okay

2017

@YashasSamaga Is there any equation that relates base current to collector current in transistors ?

Yashas Samaga

yes

Ib/Ic = alpha

dmckee

@2017 Second run theater and uneeded screeds a huge multiplexes in small towns will keep running the blockbusters long after most places have moved on.

2017

Given that I know the percentage of electrons injected into base region that passes into collector

Yashas Samaga

18:12

You should be given alpha and beta.

dmckee

As long as there are enough fan-kids and grumpy old people who didn't want to pay $20 but did actually want to see it, it'll stay on the screen in the smaller projection rooms.

2017

@YashasSamaga Alpha and beta is not given. I need to derive it I guess. Wait I'm showing you the question.

Yashas Samaga

?

alpha and beta are constants for a given transistor

2017

@dmckee Oh, never heard of such theaters !

Yashas Samaga

yea just post the whole question

dmckee

18:15

@2017 They aren't as common these days as they used to be, but most regions have one or two. Seats can be $5 or even $3 for the matinee (out in fly-over country where I live, anyway).

Minimal staffing and limited refreshment, relatively plain seating.

And they get the rights to run the film cheep because the studios can't sell them to the big boys anymore.

2017

In an npn power transistor the collector current is 20 mA. If 98 % of electrons injected into base region reach the collector, then what is the base current? I think the 98% will help in finding alpha and beta

@YashasSamaga

dmckee

But that means they don't get the film for a month or more after its release.

2017

@dmckee Good way to earn for small theaters :)

Nice

@YashasSamaga α (Alpha), the factor by which emitter current is multiplied to yield collector current, can be calculated in two ways.

Yashas Samaga

I am confused between alpha and beta

not sure which one is which

leme check

2017

Me too

I'm checking

Ic/Ib

Yashas Samaga

18:18

Ic/Ib is beta lol

2017

Yep

Yashas Samaga

so beta is 0.98

2017

These formulae are hard to remember :P

Yep, then toh it is done

Yashas Samaga

base for beta :)

2017

I need to revise semiconductors!!!

Yashas Samaga

18:19

anyway

the question you posted is just stupid

you have 20mA current in the collector

98% of the base current = collect current

this is a 6th grade school problem ,=,

2017

Yeah, it is stupid and so am I (sometimes) :P

Yashas Samaga

have you ever used transistors?

I have made a 4 bit adder once :D

I had also made a two register 4bit computer in minecraft

2017

@YashasSamaga I am using transistors even while typing this sentence. LOL :'D

Yashas Samaga

-_____________________________-

2017

My CPU has too many :P

Mostafa

18:23

@YashasSamaga If you've played the online game agario, it's almost the same situation. In this game, you have to eat others and get big.

Yashas Samaga

you obviously know what "used" in that context meant

Mostafa

But once you hit a certain mass threshold, your mass starts decaying. The bigger you are the faster your mass decays.

Yashas Samaga

I have played agario :D

I form teams :D

I never betray anyone but some people betray me :'(

Mostafa

Remember the Trump skin (agario) in the election days? :)

Yashas Samaga

I haven't played agario for a long time

Mostafa

18:28

It's especially similar to the SE rep system because of those tiny masses floating around: the bigger you are, the more mass you absorb from them *for free*.
It's equivalent to the reps coming from the old posts; which is more for the *bigger* users.

Therefore it is absolutely necessary to have some kind of decay if you want to have a fair competition (not sure if this is what you're looking for at SE).

2017

@YashasSamaga Hmm, I think beta should be 0.02 as 98 percent base electrons flow into collector leaving behind 2 percent in base...

Yashas Samaga

omg

I made a mistake even in that simple thing

2017

Ib/Ic=0.02 and not 0.98

Yashas Samaga

yea

wait what?

2017

See, overconfidence kills ;)

Yashas Samaga

18:30

alpha is Ic/Ib

2017

I checked the answer

Yashas Samaga

Ic is common for both formulae and is at the toop

2017

It is 0.02

Mostafa

@JohnRennie wow you looked so... geeky back in 1985 :O

Emilio Pisanty

G*d*****t, film's dubbed in Spanish

And Spain Spanish at that

Hell no

2017

18:31

Yeah, beta is reciprocal of Ib/Ic

heather

@EmilioPisanty, what film?

Yashas Samaga

@2017 what the hell

base current is always very tiny

2017

$\frac{2}{100}(20 mA)$

Yashas Samaga

98% of base current goes to collector

wth

that question is non-sense

oh nvm

2017

Hypothetical

Yashas Samaga

18:33

nah it is correct

it says 98% of the base current reaches the collector

2017

Yeah, that's what I am saying

Yashas Samaga

it did not tell collector current is 98% of the base current

2017

Yeah, 2 percent of total is base current

If Ib=2 units then Ic=98 units

$\beta= Ic/Ib=\frac{98}{2}$

Mostafa

@YashasSamaga Form teams in team mode or FFA (individual) mode?

Yashas Samaga

FFA mode

people make teams in FFA mode

lol

Mostafa

18:36

that's not really fair

Yashas Samaga

Ic is NOT 98 units

@2017

If Ib = 2

then Ic is 98 + emitter current

you are getting confused

Firstly, the base current has to be tiny. Base current cannot be 98% of the collect current.

That is ridiculous.

2017

Base current is 2 units..

Yashas Samaga

Secondly, the question said 98% of the base current goes to collector.

2017

How does emitter current come into play? You don't even know alpha!

Yashas Samaga

It did not say98% of the base current "IS" the collector current.

21 mins ago, by 2017

In an npn power transistor the collector current is 20 mA. If 98 % of electrons injected into base region reach the collector, then what is the base current? I think the 98% will help in finding alpha and beta

There is a big difference between telling "98% of X goes to Y" and "98% of X is Y"

Ok, that question looks unsolvable now.

2017

18:38

I said that suppose there are 100 units of current entering. Then 98 units goes in collector and 2 units is in base.

Yashas Samaga

pff

the question is wrong

2017

@YashasSamaga why?

Yashas Samaga

If 100 units enters base, 98 of them go to the collector.

and what you said is right

but

98 units is NOT collector current

heather

if you are writing a paper by yourself, should you still use "we" in the abstract? it sounds awkward (to me) to say "I show" instead of "We show".

Yashas Samaga

98% of the base current goes to collector but 98% of base current is not the collector current

2017

18:40

Yashas Samaga

@heather you are writing a research paper while you are in 8th grade?

@2017 That diagram makes absolutely no sense with your question.

wrong configuration

2017

@YashasSamaga How?

heather

@YashasSamaga it's not really a research paper

Yashas Samaga

@2017 oh nvm

DanielSank

Hi, heather.

heather

18:41

i'm just doing it for practice with the format

@DanielSank, hello =)

DanielSank

About sectioning: the usual way of doing it with \section, \subsection etc. works fine until you start wanting to reuse document fragments.

When you get to that point, if ever, then the thing in my blog is relevant.

Until then you can ignore it.

heather

yes, I read through your blog post.

DanielSank

oh ok

2017

@YashasSamaga What is collector current according to you? I think my analysis is correct.

heather

i think this paper is short enough and unimportant enough I don't need to do that, but I will certainly keep it in mind - I've bookmarked it =)

DanielSank

18:42

In any case, I definitely recommend breaking all TeX projects into smallish bits, i.e. one file for each section or something.

Makes editing a lot easier.

Another suggestion I wish I'd had:

Yashas Samaga

@2017 Collector current is the current flowing through the collector.

DanielSank

Within each document, choose some kind of name prefix for named figures and equations and use it consistently.

2017

@YashasSamaga I'm asking for value.

Yashas Samaga

@Mostafa have you worked with transistors?

heather

@DanielSank what do you mean?

(by name prefix)

DanielSank

18:43

That way, if you ever need to cross refer to equations later when re-using document fragments, you avoid name collisions.

In TeX you can label equations:

\begin{equation}
g(x) = \int f(x) \, dx \label{my_equation}
\end{equation}

heather

well that's cool!

DanielSank

zomg yes it's essential.

Then later in your document you say From Eq.\,(\ref{my_equation}) we can see that....

Yeah, you need dis.

ACuriousMind

@DanielSank Doesn't the label go after the "begin"?

DanielSank

@ACuriousMind It really doesn't matter.

2017

@YashasSamaga Remember that the base emitter junction if forward biased. Electrons injected into base won't cross over to that as easily as it will cross over to collector.

ACuriousMind

18:45

I've been taught to label enviroments directly after opening them, I think there are some weird cases where it breaks otherwise

DanielSank

@heather, in multiline equation arrays you can label individual lines:

Yashas Samaga

That isn't the point. @2017

2017

@YashasSamaga Then what is?

Yashas Samaga

The question said 98% of the base current goes to the collector.

It did not tell 98% of the base current is equal to the collector.

but you considered Ic = 0.98Ib

DanielSank

\begin{align*}
g(x)
&= 5x + x \\
&= 6x \label{second_line}
\end{align*}

Emilio Pisanty

18:46

@DanielSank @heather meh

Yashas Samaga

the base region is very thin is super lightly doped @2017

Emilio Pisanty

I mean, it's nice

DanielSank

@EmilioPisanty Meh yourslef.

Emilio Pisanty

Bit nowhere near crucial

DanielSank

@EmilioPisanty How can you TeX without it?

Anyway, heather, after generating a lot of TeX, i started wanting to include some bits in more than one larger project.

Emilio Pisanty

18:47

@DanielSank by being mildly careful when I reuse TeX from some other document

2017

@YashasSamaga A small change in base current causes a huge change in collector current. You can say that collector current value is governed by base current value. That is the mechanism used in amplifiers. So approximately my calc is good enough.

DanielSank

So now what happens if I have my_equation in more than one included document? Answer: I'm fukt.

@EmilioPisanty How do you even ref within one document without using label and ref?

Yashas Samaga

@2017 facepalm

I really don't know what to say any more.

Emilio Pisanty

@DanielSank oh, that, yes

DanielSank

You manually put equations numbers in? That's like hard-coding memory addresses in computer code. Forget it. No.

Emilio Pisanty

18:48

But document-specific label prefixes?

DanielSank

@EmilioPisanty Yes, for exactly the same reason people do that in C libraries.

It's not elegant but it's the best available options and it's 100% time tested.

heather

If there's one thing this exercise is teaching me, it's that I can write a terrible abstract.

=P

DanielSank

@heather heheh

@EmilioPisanty It's not necessary until it is.

and then you really wish you'd done it.

2017

@YashasSamaga It will be better if you state facts rather than emotions.

Yashas Samaga

"So approximately my calc is good enough"

ACuriousMind

18:50

@2017 Is that a fact or an emotion? :P

heather

I get annoyed at the authors of papers for using obscure, strange, archaic language, and now I'm doing it, lol.

Yashas Samaga

@2017 It is not an approximate.

Emilio Pisanty

I just came out of a 240 page document that reused code from six different papers and survived without it

Yashas Samaga

@2017 Error of 5,000% or more is not approximate

2017

@ACuriousMind Both.

Emilio Pisanty

18:51

Labels had prefixes on a per-chapter basis

Yashas Samaga

@ACuriousMind can you answer this?

35 mins ago, by 2017

In an npn power transistor the collector current is 20 mA. If 98 % of electrons injected into base region reach the collector, then what is the base current? I think the 98% will help in finding alpha and beta

ACuriousMind

@YashasSamaga What?

Ah

DanielSank

@YashasSamaga You're asking a mathematician about transistors ;-)

4

That is rather amusing.

Emilio Pisanty

But giving labels on a per-paper basis would just have been more noise and red tape

ACuriousMind

@DanielSank that

Yashas Samaga

18:52

@DanielSank aren't transistors a part of the high school syllabus?

DanielSank

@EmilioPisanty Tell that to every C programmer ever.

ACuriousMind

I vaguely know how a transistor works, but that's it, certainly couldn't calculate anything for it

DanielSank

@YashasSamaga Heh, not in the USA anyway.

Yashas Samaga

:|

Emilio Pisanty

@DanielSank well, tex is not C

Yashas Samaga

18:52

not even in 12th grade?

2017

@YashasSamaga Hmm, unless you point out the mistake then it is no use talking to you. Phew. in this way you are blocking yourself to suggestions and I am wasting my time.

DanielSank

@EmilioPisanty It's similar in how multi-document projects work.

@YashasSamaga No.

Yashas Samaga

@2017 I already told the mistake. 98% of the base current goes into the collector but 98% of the base current is NOT the collector.

heather

@DanielSank oh, I forgot to tell you: my highschool offers a digital electronics class! =D

2017

@YashasSamaga Why?

DanielSank

18:53

@heather Excellent. Do it.

heather

needless to say, I'm going to take it.

DanielSank

Don't skimp on analog electronics too, if you can help it.

You need both to become a true wizard.

Yashas Samaga

@2017 Firstly, the base current has to be tiny. Base current cannot be 98% of the collect current.
That is ridiculous.

heather

i will try not to skimp =)

ACuriousMind

@EmilioPisanty Well...both are probably Turing-complete, though ;)

Yashas Samaga

18:54

@2017 Secondly, the question said 98% of the base current goes to collector.

Emilio Pisanty

@DanielSank yeah, but when Heather gets to concurrent-multi-document peirce she can start worrying about that

DanielSank

@EmilioPisanty Yes, and if she's like me, she'll get there after having generated a ton of content, and have to go back through all of it and fix the labels.

2017

@YashasSamaga BASE CURRENT ISN'T 98 PERCENT OF COLLECTOR CURRENT! PLEASE READ THE QUESTION.

Yashas Samaga

omg

THat is exactly what I was telling lol

Emilio Pisanty

In the meantime, there's plenty of more important good TeXing practices to learn, I'd say

heather

18:55

@EmilioPisanty at first I misread that as TeXting

Emilio Pisanty

@DanielSank nothing search and replace wasn't designed to fix

DanielSank

@EmilioPisanty Perhaps.

Yashas Samaga

17 mins ago, by 2017

I said that suppose there are 100 units of current entering. Then 98 units goes in collector and 2 units is in base.

you said it other way round earlier

oh wait wrong msg

2017

@YashasSamaga 2 units isn't 98 percent

@YashasSamaga Earlier might have been a mistake. Let it go.

heather

<3 LaTeX

DanielSank

18:57

@heather it's the best we have. It's really outdated though.

Mostafa

@YashasSamaga Yes. Had 4 electronics courses (ElectronicsI & II & III + RF electronics ...but 3~4 years ago

heather

@DanielSank how is it outdated?

Yashas Samaga

@Mostafa solve this

41 mins ago, by 2017

In an npn power transistor the collector current is 20 mA. If 98 % of electrons injected into base region reach the collector, then what is the base current? I think the 98% will help in finding alpha and beta

2017

Who remembers stuff from 3-4 years ago?

LOL XD

heather

i mean, admittedly, I can waste hours just making a table or a simple TikZ diagram, but depending on how you look at it, those are features, not problems

DanielSank

18:59

@heather The compiler error messages are completely worthless. There's no namespacing for labels etc., the build system involves you running the same executables several times in the right order, and other such nonsense.

Yashas Samaga

@2017 nobody forgets the basics -,-

2017

@YashasSamaga I don't agree. You need revision from time to time.

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