Recent content by blueberryfive

Ok, thanks. If the process weren't isothermal, then heat would enter the gas, right?

Homework Statement One mole of an ideal gas is in a container with a moveable piston. A 100 N force moves the piston down 1 m; the compression is isothermal. Does 100 J of energy leave the gas or enter the gas? Homework Equations W=Fd U=Q-W=Q-P(Vf-Vi) The Attempt at a Solution...

Homework Statement I know for example that a=dv/dt and v=dx/dt. I was wondering whether there are similar relationships for things in electrostatics. I have to internalize all of these formulas (for electrostatics), so I was hoping to understand them in a calculus-based sense in order to...

Homework Statement I've attached a picture of the molecule. The question: at which molecules (s) would it be likely that there would be a nucleophilic attack? Homework Equations The Attempt at a Solution The answer key says a and c, only. However, I think that b is nucleophilic because the...

Thanks, so I guess my problem is that F is the net force, not just the pulling force applied to the block.

Homework Statement An object is at rest and stays at rest, but a rope attached to it is pulling with increasing force. What is the acceleration? Homework Equations F=ma The Attempt at a Solution The solution is that acceleration is constant and 0. Obviously a= dv/dt =0, since...

nvn, I've been trying to learn awk, but I still have some questions. awk '{if(/^>/){close(file1);file1="db01/"substr($1,2)}; print $0 > file1}' m.txt I read this as: if a line matches ">" at the top, then close file 1 where file1="db01/"substr($1,2). Then, print the current record to file...

Worked like a charm! Thanks nvn.

Ok, great! db01 was created. I believe it was (3) that worked. Just a general question: what language is this? Awk? tmp01 is the same as m.txt. However, the db01 files are incorrect. It seems to have not broken it up the way it should have. I'm not sure that I decribed m.txt very well. It...

Hi nvn, It is in the same directory, removing the line break (;, right?) does not work. tmp01 is blank. m.txt looks like this: >1123.m000123 conserved hypothetical protein ATAAAGAACGCCGGaaaAATGCCTCCCCAATTTTAAAAATTTGAAAACCGGGGAAACCCTCCGCAATTTATAA >1243.m000121 hypothetical protein...

Hi nvn, I'm getting: awk: syntax error at source line 2 context is print dat1 > >>> "db01/"name1 <<< } awk: illegal statement at source line 2

Great, that worked. Thanks a lot for your help, and thanks for your advice to test it manually. Now I'm trying to build the database. I have a large .txt file m.txt in that looks like this: ... >something.m.something1.txt ATCTC...etc...ACTCCCCATTTT... >something.m.something2.txt...

Thanks Fredric that's all I wanted to know!

Thanks nvn! It's giving me output that looks like a long list of this: cp: /Users/username/databasegene/2003.m000043.txt: No such file or directory Which file or directory is it referring to? Another question, how exactly do I set up the database? I have a bunch of sequences listed in one...

Hi Everyone! This is my first question for programming. I have very little experience, so if you could explain as simply as possible. I have a list of output that actually looks like this: [SIZE="3"][SIZE="1"]# Query: 2678.m000169 conserved hypothetical protein # Database...