Computer Science

Hi, I'm struggling with these 2 questions: I'm trying to understand what should i prove here and what is the approach for solving that? Q1: both expressions are O(nlogn) ? Q2: ?? Tnx, Shimon

Greetings all... i just need guide or opinion from all.. i need to develop the compiler word for short form words to full words.. example: B4U ---> before you so what kind of technique can i implement for this?? it is decision tree??or else? or what kind of programming language that can i use to develop this?? C#??C++?? or JAVA? hope anybody could give opinion..and help me. many thanks.

I am doing my masters in computer science. Now we have java Programming so kindly anyone who can help me about the projects in Java Programming. I need the projects step by step whether in videos form or PDF.

A digital/analog computer. The human brain combines analog (smooth curves) and digital (this/that: hot/cold, love/hate) verbal/symbolic reasoning. Fully analog brain = smoothly curved shape receiving input, outputting output, and morphing simultaneously in realtime, merged seamlessly with sensory input. It can recognize shapes based on fuzzy matches with memories, and uses fuzzy matching to output any curved fuzzy thing it wants (and understands any curved fuzzy input it is familiar with). Combining analog with digital = much better graphics, superintelligent "AI," much better pattern recognition, infinite resolution (no joke , and more fluid and organic behavior for soft…

Maybe someone can help me. I am looking for at least three major mechanisms for Voip security so i can describe and compare them. Thank you.

Hi, I go to school in Holland and I need to do a sort of term paper to graduate. Now I am doing a very simplified paper about Computer Sciences and cryptology. I do not know a lot about cs yet, but I am planning on studying it after I graduate. Now here is my question: I am doing a small research on how to measure how secure a cryptology method is. I researched the subject and found the complexity theory, but that was far too advanced for me. So I decided to do research and simplify the awnser a bit. Now I am trying to turn several cryptology methods into simple additions, subtractions and multiplications. Then I interview a group of classmates and see how fast they …

Hello everyone! I have an assignment about configuring and compering NFS and Hadoop. For me this two option for distributed file system are unknown and i would like to know if someone has previous knowledge related to this. My main question is which one NFS or Hadoop is the best choice, which is more suitable? Thank you.

hello everybody, it's my firts post and i wanna share with you some of my favourite books in computer scxience especialy in computer networks. first of all, I am fun of Andrew Tanembaum and i'd like to introduce 2 book of this great professor. the first one is Computer Networks and the second one is Modern Operating System and the third book is about the Ethical Hacking. for the ones who are intersted by this fielld and they want to pass the certificate or to have some ideas about it . Computer Networks : Advertising links removed by Moderator Modern Operating System : * Advertising links removed by Moderator CEH …

my son needs help with programming1(beginner) course. we have Skype and PayPal.

A modern approach to computer science [link removed] wireless communication and networks [link removed] these books are recommended by the teachers

a) Write a function, named getNumSum(), for accumulating(summing)float numbers: ->The function has no return value ->The function has 1 input argument named aSum: the current accumulative sum to be "updated" inside this function(Hint: use pass by reference) ->The function asks user for a float input, then updates the accumulative sum ->No code for input validation needed

Hi there, I received a bachelors degree in computer science about 3 years ago, but since I did not have any experience, i could not find a job in the industry. I have been working at a law firm doing real estate closing for awhile now. However this is not what i want to do with my life. I really want to start a job in the computer science field. Can anyone give me any pointers as to what I should be doing to better my chances of landing a job in the field. I do not mind to start low, as long as the job would teach me the skills needed to advance in the industry. I tried to refresh my programming skill, but I find it very easy to get out of practice, especially when you d…

Allows you to simulate memory with only a styling language(CSS). Clicking the image will cause the text to show up. Dragging the image will cause text to remain. Works in Firefox and somewhat in Chrome. http://jsfiddle.net/w7B6S/2/ Typically more appropriate JavaScript is used instead, so kind of novel. There are similar tricks out there, this is just the first time I've seen this particular method put to use. Technical: In Firefox if you drag an image, the active state remains until you click elsewhere. If you drag in Chrome, it will only last until you move the mouse again.

So last night my brother in law took my ThinkPad Lenovo t410 and did a backup of the data (It was his fathers and had some private info) When I got it back this morning and opened it..This is what I see. NOTE: I have reinstalled the drivers for the graphics card from the IBM website. I asked the system admin here at the university and he had no clue. I figured this would be the place to ask and I hope I am right. I was planning to do a complete restore next but wanted a third opinion first. Also I am not sure if the screen caps are going to come out right. All black on my laptop looks like a Green, Contrasted Gif or something. With the little green pixels all over the…

Hey fellas, I have a Problem in understanding on how to proof the following: Let Q = {max,f,L} be a NPO-Problem, where f only supports integers. LQ* ={(x0,1k)|there exists x such that L(x0,x) and f(x0,x) >=k} The instance of x0 is binary coded while the numerical parameter k is unary coded. Show that if LQ* is NP-Complete, then there is no full polynomial approximation scheme for Q. Normally I have so sort of idea, but this time I am really stumped I would be grateful if you could show me on how to solve such issues. Sincerely yours heliodromus

I'm rather stuck in my attempt to try to learn something. I want to learn how to implement data decoding and encoding for compression purposes primarily for decoding text streams in PDF files. I have read the pdf reference though it doesn't teach me what I'll need to know. I didn't for a minute think it would. I'm stuck in my understanding of this. In order to decode text streams there are a number of different encoding algorithms used, which can depend on the age of the pdf document. I know that in allot of cases now, for text streams, FlateDecode is common so the open source library zlib can be used for this purpose. There are a number of other different…

Hi, My name is Ilya Gazman. I found an exact solution for Traveling salesmen problem. Currently the best implementation according to wiki is Held–Karp algorithm that solves the problem in time O(N^2 * 2^N). I believe that my algorithm can do this in O(N*C * 2^N) when C is a bit smaller than 1. I need your help to officially approve my work and update the wiki page. So if this is interesting you here is how I did it: Lets say we want to solve a 6 cities route with the brout algorithm. There are (6-1)! options for that, we will need to test them all and return the shortest route founded. So it will look something like that(Cities names are: A, B, C, D, E, F…

Hello i am taking a comp sci inro course and i was wondering if anyone here could help me? Here are the questions i am currently trying to answer. Complete the following method that determines if two chains of nodes are equal, that is, they have the same strings in the same order. Note two empty chains are considered equal. public static boolean equals(Listnode<String> chain1, Listnode<String> chain2) { Assume the LinkedList class uses a header node with null data. Complete the method below to be added to theLinkedListIterator class. This method inserts item after the node currently pointed to by the iterator. (You may assume that the Linke…

Hi, I have talked about services such as readnotify.com which tell you if your email was read or not. The only problem is that they charge you arround 30 us dollars per year. I don't want to pay that much. My summer vacation is here and this summer i want to figure out how this works and how to make it. As far as i know it either puts an activeX script of an image in the email. Can someone tell me how exactly it works and help me make something like this?

I was reading this article, it was news some days ago, but basically there was a communication problem between the module and the ISS, which aborted the docking attempt. I followed the link to the source and read this: And then it sort of hit me; this is a typical protocol implementation error on the side of the module programmers, i.e. langsec vulnerability... Hilarious and sad at the same time! http://www.space.com/22895-private-cygnus-spacecraft-aborts-docking.html

Hello Everyone, I am conducting a research on Go language (Google's new language) to see if it can be used for teaching. If you have gone through an introductory programming course, please could you spare few minutes to fill in a short questionnaire below (just questions about your programming experience, no personal data ), the data will be used solely for the research work. http://fluidsurveys.com/surveys/okonud/introdcutory-programming-survey-questionnaire/ Thanks and Best Regards,

How does ALU multiply and divide representations, or does it depend on the signature of the bits or number(s) being processed.

I'm confused with the notations used in algorithm analysis. Can somebody compare and contrast "Big-Oh vs Big Omega vs Big-Theta" notations with respect to time Thank you......

Is there a computer language that can be more efficient? The only other I've heard of that's more viable than binary is a quantum computer language (forgot the name, pretty sure its called Dynamic Binary)

Can we use JOptionPane to show messages while we are using a scanner as out public class? ( import java.util.Scanner; ) ?