Computer Science

I don't know if this has been done before, but I thought of an idea where people can install a java program that takes all the mouse clicks from your computer and sends it to a webserver so people can make apps that use those mouse clicks to carry out a function, i.e. making music from all the user's mouse clicks or making an analysis app. What do you think?

So, I want to implement some encryption into my webpage in relation to some data pertaining to IP Addresses. I want to use XOR encryption since it seems to be more efficient for smaller strings. However, after researching for a bit, there are apparently ways to crack XOR encryption through pattern recognition. So, is it an encryption method I should use for smaller data?

I just read this WIRED article about how malware implanted in the firmware of computer components would be especially persistent. http://www.wired.com/2015/02/nsa-firmware-hacking/ How commonly does malware infect the firmware of computer components or networking devices? How would one go about identifying or eliminating such malware?

How many bytes are required to send a query to a mysql server over the web? I know it is relative to the data being sent, but let's just say we are only sending 4 integers and 1 date/time type. What is the required bandwidth to do this? EDIT: Let's also assume that an ODBC is being used to make this connection.

If you haven't heard, Nevada is beginning to use self-driving cards. Not fully self-driving, but enough to stir some discussion. http://www.extremetech.com/extreme/205160-sign-of-the-apocalypse-as-daimler-unleashes-self-driving-trucks-in-nevada-hardly Anyways, I think this should begin a discussion about the future of strategy and how self-driving(running) vehicles or units will enter us into a new age of strategy, mainly real-time strategy. As technology gets perfected and the reliance of human uncertainty will grow nill, real-time strategy simulations will become more realistic due to the certainty of this technology. This means that real-time strategy game…

never mind I solved it

Running time T(n), where n is input size of recursive algorithm is given as follows T(n) = A + T(n-1), if n > 2, T(n) = d if n<=1. wi

What is the running time order of the following code fragment? int sum = 0; for(int i=0; i<10; i++) for(int j=0; j<N; j++) for(int k=N-2; k<N+2; k++) sum = sum + k; Is it O(N^2)?I am so sure!

How do I send sms? I want the computers on my network to be able to send and receive sms messages. To other computers on my network and to the other network providers how do I do this?

Hi all, Got this question. Is there a way to guarantee that a data set can be clustered such that it's silhouette coefficient will be greater than a constant? Note that there is no clustering method specified(dbscan, k-means etc.). I have been thinking about this problem for so long and no paper has addressed that.. Sad... Any thoughts will be appreciated.. Thanks so much!

hi i have a table and one of the questions is P(X≠Y) I am so confused! does this mean is the same as Pr[X∪Y ] which means : Pr[X⋃Y ]=Pr[X]+Pr[Y]-Pr[X ∩ Y] Please help ! for example the table is something like that: y x 1 2 3 4 1 0.02 0.02 0.02 0.04 2 0.04 0.04 0.04 0.08 3 0.14 0.14 0.14 0.28

Hi. I used to do a little programming back in the very old days. I know languages are far different now. I'm curious to know how many words (approximately) are required for a computer to follow. Can you list a few of these words like "go to"? I'm trying to get a feel for the number of words needed for basic one way "communication" and the most extensive computer vocabulary should be reflective of this, I believe. Thanks in advance.

Hi there gents I managed to find this function which converts a 2 byte hex to 2 byte BCD, but since 2 bytes of hex can hold a decimal value 0 to 255, it is limited to a hex value between 0x00 and 0x63 (0 to 99). uint8_t hex2bcd (uint8_t x) { uint8_t y; y = (x / 10) << 4; y = y | (x % 10); return (y); } I need some help adapting this to produce a 12 bit (can use a 16bit variable) BCD output. I have developed my own code, but it is very very long and highly inefficient, so I am looking to use the simplest code and/or fasted code possible. CK edit: came up with this, which doesn't seem to work. uint16_t hex2bcd12bit (uint8_t x) { ui…

So, I was just thinking about this earlier and thought I would just share my idea. I don't know if this is an actual bypass. Inform me if it is, though. The idea involves developing an app that allows a mobile device/PC to connect to the hotspot device(which also has the app) that has the Internet access. While the device doesn't provide direct access to the Internet, what happens is the hotspot device would allow requests from the connected devices. Essentially, the connected devices make requests of webpages to the device. The hotspot device would then download that requested webpage and then send it to the device that requested it. That is just the basic aspect of …

Hey guys, I am new to this beautiful forum and WELCOME ME I have a little problem here that I can't find an answer about it ... There is an exercise in the AI book I read ... that asks : Why can Bidirectional Search be used in the N-Puzzle problem but not in the Travelling Salesman Problem ? So there are two things we need for BiS ... The Transition States must be the same when we apply them in the opposite way We have to fully know the Final/Goal State, not just some characteristics about it . But they both meet the requirements , we know for both of them where they'll be (N-Puzzle has to count from 1 - N & Travelling Salesman has to travel from the 'A' City to th…

This thread has been merged with the topic opened by the OP in mathematics. Before considering the imminent demise of RSA encryption there is a mathematical question to answer. Merged thread here http://www.scienceforums.net/topic/78958-does-this-hold-true-for-all-prime-products-rsa-isn-the-encryption/#entry861328

Hi (new here). I've been thinking about the web and it's purpose of sharing information with other people. I'm beginning to wonder whether sharing all information is strictly a good idea. What if I could share some information that could then be modified and used to control people. How can I know whether the information I share will save or doom us? I feel that I should be careful with what I share as governments can take information and adapt it into a tool of propaganda. If the government know what you are thinking and what the general mood is amongst the population they can easily reflect this back to you in order to keep you in a controlled state. What are the rules o…

When I was learning Java, the tutor use to use HEAP and STACK memory as example to teach how does Java work on the method and data of the objects..... but is there any clear, well-explained explanation/concept/definition on STACK and HEAP memory? ALbert

Hi I wanted to sart this thread to talk to you about Full Dive (you might now this from The Animi Sword Art Online) So for anyone who does not know what Full Dive is: Full Dive is what you might call a full game so the idea of Full Diving is that you put on a helmet and you get trancferd to a gaming world and the controller is your brain! so thing with me please, you now have a helmet and your just laying on your bed but you thing you are in a other world try to move, oh you just moved in this Pc world right? well you are still laying on you bed with this helmet but you did not move in the Real Wolrd (for short RL) Thats the idea! …

Hi! Now I was going around in the park later today and I thought about Full Dive technologie (here is a post I made about it!: http://www.scienceforums.net/topic/88270-full-dive-technologie/) now there seems to be a broblem with our pc´s because today of time we dont have so good pc´s to handel all of that Information! But we can our barins can Prosses Terabites of information every second! now so how about a Barian Pc so its not like you use a human as a pc dont get me wrong! but you could maybe make a new Brain it should not have its own mind or it will get mad and so... but you could maybe acctuly make a living pc in that kind of way... I mean we can make app…

Hi all. I am looking to plot a graph of the Parallelogram Law summations shown in the link below. I am not sure how to do this, since the vector g, needs to continuously point to the origin after each summation. Does anyone here know how to do this or on what platform to do this? Using the graph, one can determine the rate of precession per revolution. Also the vector, g, needs to incorporate the inverse square law. The initial velocity is something the user determines. The rest should be done by the software. Thanks in advance for the help. http://3.bp.blogspot.com/-tFDkItTrHWY/Ug-bh0x_NRI/AAAAAAAAE6U/PKx81419uBA/s1600/Kepler For some background on the que…

so lost!

How do I write pseudocode where input is a table and output is a list for this example: Please see the table attached. It's a table where the first column are students in a classroom and they are ranked based on their performance from the exams. A. I want to write a pseudocode algorithm to determine the rank changes after the exam. Input is the table with n rows, and 5 columns. So far I have this: M[n-1,4] The output should be a list with the differences in ranks for each student. For example [2,3, -4, 0, -7] B How do I write a pseudocode algorithm to determine which student scored at least 90% of the questions they completed. Output should produce a list eg.[0,4] T…

So, I am currently working on a database project that would improve(or try to) on the current model of database queries and other stuff. One idea I had was to allow a column have multiple types allowed within itself instead of having a fixed type. Would this be a bad idea? Also, would allowing queries to contain arrays/lists be bad? If someone has any suggestions on new features for a database to have, that would be fine. I am currently testing out my skills in programming and seeing how far I can go with a project like this.

I just need help verifying that I have the correct analyses to the problem below: Assume we have a random number generator function called randInt(i, j), which generates a random number between i and j. We will use this function to randomly generate a number between 1 and N, i.e., randInt(1, N). We want to fill an N-sized array with a random permutation of the first N integers using the randInt function above. Algorithm 1 : Fill array arr_ from arr_[0] to arr_[N-1]. To do this, randomly generate numbers until you get a number that isn't contained in any of the filled slots of arr_. This ensures that all numbers from 0 to N is used. My analyses: My analys…