Computer Science

I am in a Computer Network Security class, and I have to answer 2 different discussion questions (each answer has to be about a page long). I am having trouble with one of them (the other I have yet to try to answer), so I was wondering if someone could help me with the question. Here it is: Most of the encryption standards that are being used such as RSA and DES have not been formally proven to be safe. Why then do we take them to be secure - what evidence do we have? Any help will be appreciated.

Hi I'm new to these forums I don't get exactly how it works but I need a way to test theories of higher dimensional shapes, how do I make those and test them? I don't know anything about programming and I don't like it, is there just some thing I can do in blender? Like mesh-->render->tesseract plugin or something? I need to run things through them too like waves and fluid and balls and ect.

Hi, My name is Cathy Ennis and I am a post-doctoral researcher in the Computer Science department in Utrecht University. We are currently running a perceptual experiment on the animation of a virtual character (to be used in a serious game) and would be grateful of any participants we could get. Details of the experiment: You will be asked to view a series of short animations of a 3D Character (60 in total). After viewing each animation, you will be asked to rate the motions based on four parameters, which will be explained at the start of the experiment. Duration: It will depend on how long it takes you to answer each question, approx. 30mins. I have include…

I am new to the forum. Hello all... I was flabbergasted the first time I used an IDE that had the "period completion" feature (or the similar, "left parenthesis"). It made me considering leaving old trusted "vi". The problem with the period is that it only goes one step deep: more steps are needed! Additionally, sometimes the period is not the answer to your travails, when a non-member function is the one that will convert from type "A" to type "B". When I was learning Java, a large number of questions (and time wasted) that I posted were of the form: "How do I convert [some type] to [some other type]?" The text conversions alone occupy an unordi…

Hi everyone, I have a problem about an exercise. If main memory's split into 4 sections with size: 600K, 500K, 200K, 300K ( by order ), and 4 proccesses with size: 212K, 417K, 112K và 426K ( by order ). How those proccesses would be allocated to main memory if using : a) First fit b) Best fit c) Worst fit Which is the most effective in using memory? I've found 2 answers for this. One with external fragmentation, another with internal fragmentation. I can't make up my mind. Which is the correct answer? Please help me. Thank you.

I'd like to respectfully ask for some advice on this forum. If you have to program complex mathematical code, do you prefer to write the code yourself or obtain an algorithm from a library of such downloadable code. I'm especially interested who has real experience in this area. Have you had good luck with the libraries? Just for clarity sake, I mean a library like Numerical Algorithm Group (www.nag.com), that costs $3000 per year for unlimited downloads. The code is supposed to be checked out and they offer assistance implementing the code. Do you think this a bargain, have you ever tried such a service? Thanks for any advice you can share on this topic.

I understand that machine language ( and assembly ) is the only language that the computer understands. But, how is a microprocessor able to read these codes ?

So I invented a turn-based board game with some buddies based on monopoly and I'd like to implement a version that's playable online, since we're no longer all living in the same town. I'm thinking I could implement the back-end in Python, or possibly java, but i'd need user accounts, some way to restrict timing for user-turns, do in-game auctions, display pieces moving across a simple game board. A simple user-interface would be perfect - my goal is to have a feel somewhat similar to this version of Diplomacy: http://webdiplomacy.net/ I have programming experience but have never created a game and haven't done much web-based stuff besides for static html pages. A…

Hi all, Please suggest a good hash function and the optimal table size top hash 4 billion unsigned integers. Thanks in advance, Roy

Hi, we are looking for best solution to configure CFP MSA compatible PHY with MDIO interface. The best would be to have some USB to MDIO adapter with LabView support.

hi, I applied sequence alignment with dataset of social networks, and I got similarity matrix. for ex. z is similarity matrix with size 3*3 z=[0 2 3; 2 0 4; 3 4 0]; when I did sequence alignment, I skipped the comparison the element with itself, so get zeros in diagonal. Is the processing is right? which the best method to do clustering given similarity matrix of sequence alignment? and if similarity matrix h as zeros in diagonal , is that has affecting the clustering results? thanks in advance

I realise I could probably be massively out of my depth here, but i've recently gained a desire to learn and become capable in the world of computer science. Consequently, with such a massive field to learn about I was wondering where to start, and so basically I set up this thread to ask for any tips or recommendations of how to learn about it. Currently I study History at a university in England which leaves me with a fair bit of spare time but not much money and so im basically looking for help or free internet sites that can teach me the basics from which to develop a further understanding. Or, if any of you could give me a basic introduction and explanation, it c…

Hello. Forgive me if this question is too simple or perhaps I did not make the question it in a constructive form. I'm not used to asking questions in forums and I'm very much afraid that I might have broke the rule of this forum. I am quite new to computer science and I am in the process of learning about Finite State Machine and so far it has been good. So, I traveled around the net seeking an example of a basic and intuitive FSM model for a VCD or DVD player but was unable to see any example so far. This is strange as I wonder, how could no one ever thought of making an example of FSM model for a simple machine such as this? The purpose for me asking this ques…

Guys, can anyone tell me if there is a technique to capture only the selected information from a 'copy' action and paste it on a sheet that has labels which have the same name as the copy area.. If I'm not clear, I'd cite an example. sheet1 has : Name : Sam College : GSC Place : Bangalore Batch : 2010-2012 Sheet 2 has, Name : College : Now if I copy all from sheet 1 and paste it in sheet 2 it should capture only those fields that have the same name, others should be simply ignored.

Hi can anybody provide me source code for automatic rule generation from previous data in Fuzzy system by neural network. Thank you.

Oh hi, So I was wondering if someone could explain how memory works on a laptop and/or desktop (if there's any difference). I know there are several sources of memory which all are interconnected but I'm not quite sure how. There's the processor which has a small amount of memory (cache memory?), then there is the solid-state drive memory (flash memory?), then there is the RAM memory, and lastly, the hard drive memory (storage space?). Could you please explain to me what all of these are/do and how they all function together? Thank you in advance.

I want to aplly the 1 Recursion Thorem and find fix for this function: 0 if x=0,1 f(x)={ f(f(x+2))+1 if x>=2 Can anyone help me to slove this?

Hello everyone, I'm a project manager in a research institute in Russia. Our team comprises ~20 developers. In the last 4 years, our main amusement was outsourcing software R&D projects for IT companies. On the one hand, we are supposed to quickly (4-6 months for a project) deliver proof-of-concept prototypes with measured accuracy and performance, as well as to devise demo web-applications. On the other hand, as an academy, we are interested in fundamental researching, i.e., trying different approaches to the same task, familiarizing with new technologies, improving overall R&D skills, submitting papers and patents, and so on. Moreover, there is a constant nee…

Hi guys, it's me again. for i=1:n; fprintf('Enter the coefficient of b%d:',i) b(i)=input(''); end Just wondering what's the (' ') doing over there? I've already run it several times, and it seems that it is accumulating your input. Just want to know perspectives of you guys.

HI, please help me..i comsume a lot of time to think this but i still cant slove it~~~~ Consider a combinational logic circuit with three inputs a,b and c, and six outputs u,v,w,x,y,and z.The input is an unsigned number between 0and 7,and the output is the sequare of the input.The most significant bit of the input is a,and the most significant bit of the output is u.Create a truth table for the six function.

Taking some courses which will teach certain maths programmes but i was wondering which ones to focus on. At the moment i am learning mathcad, but later will have the option of learning C++. I'm told C++ is similar to mathmatica, so by learning one you get to know the other a bit. Is it worth learning mathcad at all? Also learning some stats packages, S+ and R. Are these used outside the world of stats at all?

There are some articles online on this but none of htem really answer my questions. I'm not a programmer so I'm just interested in how it works algorhytmically; How does it format data to make it searchable and how does it interpret querries in natural language?

Hi guys, I am currently doing a Matlab program for scaled partial pivoting. I looked at my friend's example: % Partial Pivoting for i=1:n-1 for j = i+1:n if (a(j,i)) > (a(i,i)) u=a(i,; a(i,=a(j,; a(j,=u; v=b(i,1); b(i,1)=b(j,1); b(j,1)=v; end end end I was wondering what is the meaning of the :? Previously I have come across a few times this thing, but I don't know what it stands for. Is it some sort of Matlab keyword?

So I'm studying for my final and I'm trying to understand what are some of the tradeoffs between creating a class function or a global function (consider operator functions I suppose, my professor mentioned that some operator functions MUST be global, and I didn't really understand). If anyone could help me understand this I would be grateful, thanks!

is there anyone who is well versed in python or capable of sharing the basics of python language. just help me to start off with the python language; i will develop from that. thanks