Computer Science

Hi all, Does anyone know of a PHP compound parser that takes a compounds formula as input (e.g. UO2(CO3)) and then spits out an array of the element symbols with the number of each present in the specified formula, in this case U=1, O=5,C=1. Any help appreciated!

hi, can system download in sleep mode? if so, please let me know how to configure for that (in windows 7). thanks, basha

Hey just had a quick question regarding ROS. I'm running a linuix distro right now (Ubuntu) and have been trying to run a downloaded copy of 'Rise of Nations' (its from my original hdd) and have decided that setting up a virtual drive to mount the iso on is too much work with not enough return (issues reported include mouse problems and no sound when running the game). So I was curious about using a new OS to run the windows program. ROS shares alot of the API with windows but its built from the ground up and I'm not real familier with its capabilities with regards to applications and there is no database that I could find that lists this information. Any help at …

So I have been having some fun messing around with the 3x+1 problem, also called the Collatz Conjecture. What I have been able to do is create a program in Python that given an integer will print each step of function until it becomes 1. The code I wrote for this was: from __future__ import division from visual import * from visual.graph import * n= while n!=1: if n%2==0: n=n/2 if n%2!=0 and n!=1: n=3*n+1 print n What I would like to do is to modify this so that I can have the program run for a large number of numbers, and return the number of steps it took to get to 1 for each number. Sadly I really have no idea how to approach …

I am currently working on a widgets library and the combination of this with my thinking on a number of other posts I have made has me delving more deeply into the subject of integrating an operating system, as a standard consumer understands one, into artificial intelligence. Just to give an idea of where I am coming from I will cover the thoughts that got me to this point and what it is I am thinking to possibly accomplish. A number of years ago I had posted on SFN that I had wished to do some work on machine vision and well three years later, although I have still not reached any of my goals, I am progressing towards this. Today I made a comment about a device th…

I want to build a computer, for gaming, but i dont need anything that is gunna run 500 fps on ultra high graphics xD I just want something that will run smoothly while playing World of Warcraft or similar games, and if anyone knows about the new game Rift coming out, i want to be able to run it smoothly. I know a little bit about computer hardware, but nothing at all about the programming, so if anyone knows anywhere that can help me, thats be great. I know a website called ibuypower.com but i was wondering if anyone knows of something a bit cheaper.

I'm a PHP Pro, but haven't use any PHP framework till now, so I have no clue on how to choose a PHP framework. Do you have some tips to help me choose the/a right PHP Framework? I want a stable and secure PHP framework for Projects with about 400 hours development time. It should be possible to use the framework on Shared-Hosting-Webservers. I don't need some AJAX support (I'm using extJS). It would be nice if the framework supports Rapid Application Development and object-relational mapping. Also some of the standard-functions (Authentification, form validation) would be nice. Caching would be a usefull, but isn't needed. Needs for a PHP framework: Link…

TECHNOVISION'11 Rulebook.pdfTECHNOVISION’11is the technical paper presentation event of TROIKA, the annual technical festof IEEE student branch of Delhi Technological University (formerly DelhiCollege of Engineering), Delhi organized in the month of February, 2011. Over the years, Technovision has witnessed an exceptionallyenthusiastic participation from students from across the country. Not just thestudents, but companies like Nokia, SchneiderElectric and STMicroelectronics have been involved with it. Papers are invited pertaining to thefollowing streams of science and technology: 1. Electrical and Electronics Engineering 2. Computer Science and Informa…

The online backup service Mozy looks like there in trouble this month as they are revealing that next month prices will go up a huge amount. To be fair in some circumstances they might occasionally make things cheaper for users with multiple computers but at the expensive of what I should think is nearly all their customers who will now be forced to leave. For example to back up 1TB used to be something like $4 a month (can't remember the exact value) but is now $89.99 per month. To put it another way thats about $48 per year before vs $1200 per year now for that amount of data. If you think there is some possibility that the company has a future look on their for…

every time i type $python myfirstprogram.py it says syntaxerror: invalid syntax whats wrong with it?

This looks pretty epic. It also has free 3G. It would be amazing if it had color e-ink and a Kindle app. I think this might be the start of the next generation of tablet tech. Imagine a non-backlit iPad that will flex instead of crunch, but has the full power of a laptop.

I read a short scifi story where there was a computer virus that was programed to delete hostile programs(other virus) . it was also designed to shut down a system if it "thought" that the security of the computer was comprised and to identify any new virus based upon their actions and source code. is that possible? is there any benefit of such a program over a antivirus software? what would make this a virus rather than a normal program?

Since about 4 months, I run Ubuntu 10.4, which is the LTS (long term support) version. - Downloading went really fast. It's officially free, so there's no hassle with payments. Just click & download. Then burn it on a CD... and be done. - Installation was really easy (choosing a partition is the hardest thing - for the rest you just need to answer some really simple questions - and I don't even choose a partition, I just disconnect my data harddrive, and use the entire main harddrive for my ubuntu). - The installation came with a number of programs which are easy to use. - The drivers for my graphic card are not free, so I had to install those separately - ju…

what is the best brand of computer and whats the best operating system? do desktop computers have better performance than laptops? what is the difference between a notebook a netbook and a laptop? which is the best browser and why? what is the best antivirus software? what is the best free antivirus software? can a laptop be gotten for $x<$300? and if so will it be crappy?

Well we've had a little bit of a problem with plagiarism recently, but that got me thinking... spam more or less has to be either gibberish or plagiarism. The gibberish is easy enough to notice. Well-written spam would be harder to spot, but it would have to look a lot like plagiarism. Right?

Last two versions of MSWORD (with document extension docx), are very different from earlier versions (with document extension doc). One of the changes is the new interface. I would vote against the new interface, if we had a referendum about it. I would argue that the 2003 version was already a very good tool; we became very familiar with it. Learning the new interface, as in the 2010 version, is a burden not worth accepting. What is gained by a typical user is negligible in comparison with what was lost. How would you vote, and why? .

Hey Guys/Girls, I'm less than a year from completing my B.A. in Computer Science at Wright State University. I had an epiphany though. I realized I don't want to spend the rest of my life sitting in front of a computer screen. Are there any options out there for jobs with my degree that don't involve operating a computer all day long? I'm starting to think my only choice would be to go back for a Math degree or something similar but I've been in school for 7+ years and even then my future seems bleak. Thanks!

Good Time, Amici. i started sourceforge project for that algo, there're first release & c++ code. Prime Idea, laid into basis, has been to get reliable source to collect Entropy, but not to've necessity to install extraneous devices. ------------------------------- Thanks a lot in Advance.

I'm studying for my bachelors degree in computer science, and I might continue on to get a masters degree. I have my A+ and Network+ certifications, and I'm planning on getting Linux, Network Security, and the Microsoft certifications. Can I get a job doing computer forensics with this? If not, what should I do to increase my chances of getting a computer forensics job?

On this page I propose a new kind of algorithm to generate random numbers. http://www.number.com.pt/index.html My question is: Is this safe or not? Thanks.

I am needing to create a 128bit hashing function for a look up table of running objects that are indexed by UUID! The typical hash<T> is not liking the 128bit unsigned integer I am passing it as it cannot be converted to the 64bit size_t internally specified in the algorithm. Why not just store a pointer to the UUID in question? Well this would be terribly convenient wouldn't it? Regardless of the underlying problem I wish to learn the best design policies of developing a hashing function as this is something I haven't directly attempted as of yet. I am analyzing this from a purely Set and Group Theoretic standpoint and am using the very few Abstract Algebra…

Hi, I was wondering if anyone knew much about non-deterministic finite automata (NFA's)? I am working on a grad project and keep running into a question I can't answer. Basically, when an NFA is "reading" input from it's alphabet, it is moving through a series of states. Because, this is an NFA, multiple branches or threads (actually, copies of itself) can all be running simultaneously checking all possible states given the input. If at least one of those branches is in accept state when the input is done, then the string is accepted by the NFA and thus part of its language. However, this being an NFA, some branches can terminate prematurely. Some states will have n…

Hello all! I think we leave in really exciting times where the power of information is becoming even greater! It is best seen these days in Wikileaks. I don't know how many of you have been following this story but they are distributing information from the government of America over the Internet which includes state secrets! It is hard to say what they're doing is good or bad. I would like to think it's good but we still don't know what all is in the files they have! All of that having been said the power they can have just by having a web site is pretty amazing to me. Wikileaks may be the most powerful web site that has ever existed.

Hi all, I'm trying to find out how to establish when to optimize for processor usage versus memory usage. In the application I'm working on it's not actually a big deal (not large-scale enough to worry about) but I'm curious how it's decided for more critical tasks. The situation is something like this: Vehicle X has Customer Y, where Y is the Owner of X. It would be possible for each Customer Y to have a list of all Vehicles they own stored within them. Which would be preferred: the increased memory usage of having each Customer Y list all Vehicles they own, or the increased processing time required to go through all Vehicles and return a list of all Vehicles …

1. Bob has n friends: a1,a2,...,an, Bob has also a list L which is a subgroup of {a1,...,an}x{a1,...,an} which specify which of the friends knows each other (i.e. the pair (ai,aj) belongs to L if and only if ai knows aj, ai knows aj if aj knows ai). Bob organize a party and he wants to invite as many friends he can but each friend has to know at least 5 of the people who are invited. write an algorithm which returns a list S who is a subgroup of the friends group and represents the friends which are invited to the party, so that S is legal and it's size is maximal. prove the correctness of the algorithm and analyze it's run time. 2. Given a undirected graph G…