Computer Science

I saw a retro episode yesterday of a tv adventure called 'amazing race' in it the participants had travelled to japan. I recall that i had seen the same exact episode in year 1999 in poor quality television broadcast. So it might had been originally recorded in 1998. In it was shown that 'windows7' software was used in a japan's railway bullet train terminal pc touchscreen for tourist information. The same 'windows 7' was launched in india in 2011. So if this is true that pc and software came late to india, then what are the current pc and software available in japan??? Which would be available in india in 2026?

I want to better understand CPU architectures, and learn to program at the same time. My goal would be to learn how the CPU manipulates data at the lowest level(I/O, computations, etc), and so I thought maybe learning how to program at lower levels(assembly, or directly on simple micro-controllers) would be a good way to understand. What is your opinion? What would you recommend? I figure someone in the CS field would have the best advice. Thanks

I'm starting my research in bioinformatic area. There are a lot of bioinformatic tools that I need to study and find gaps in each of them. I'm confuse which one should I choose. Can you help me identify tools which are used by pharmacist (drug-drug interaction / drug development / etc) and oncologist (identify cancer genes). I'm stuck right now..helps!! Thanks a lot

For example, will a tooltip for an image or a website link display on touchscreens? What happens on a touchscreen to the mouse effects that drop a menu when you roll over a navigation link, or to the mouse effect that displays a thumbnail preview image at different sections of a video's progress bar? Or are touchscreens missing a way to display these useful info accessories?

Hello Guys, I wanna know how i could simpify this expression . It's been 5 days since I started thinking about it so how can i simplify that expression A'B'C' + A'B'C + A'BC' + AB'C' to equal A'B' + A'C+ B'C' Thanks alot, Ahmed.

Hi all, I am just revising my computer skills after a 30 year break. The question on my mind is what are the fundamentals building blocks of computing? From my revision I have learnt that there are four basic logic gates AND OR XOR and NOT - from these all other logic gates can be built. Then of course there is binary. the conditional statement IF - THEN is currently puzzling me how is this constructed from the above operations? It seems to me that it cannot be?

We design cars with computers, and as a result we get better cars. We design computers with computers, and we get better computers. Why don't we start designing robots with computers? We should get better robots, which could use computers to design even better robots, which could use computers to design even better robots, etc., etc., etc. It's a neat idea, don't you think?

The basic set of commands, or instructions, that a microprocessor understands. One of the principal characteristics that separates RISC from CISC microprocessors is the size of the instruction set — RISC microprocessors have relatively small instruction sets whereas CISC processors have relatively large instruction sets. What is Instruction set | Instruction Set Format | What is Instruction set | What is Instruction set

started on a space game a few months back with a friend here is my latest video

For example, without .html. Or, www.scienceforums.net/index rather than www.scienceforums.net/index.php I've even seen it where they just keep adding deeper pages, each separated by a slash. Like so www.scienceforums.net/index/how-do-I-make-a-url-without-a-second-extension/the-answer My webpages are set up as a normal file structure. I put all .htm pages in the home folder, and images, .css, etc., in a deeper folder. Is this as simple as not giving the file an extension? For example, naming it example rather than example.htm (it just occured to me ) If so, I still don't understand how to make one file a deeper part of the other (in the file hierarchy …

Hi I'm taking a multimedia systems course and I'm preparing for my exam on tuesday. I'm trying to get my head around LPC compression on a general level, but I'm having trouble with what is going on with the linear predictive filter part. This is my understanding so far: LPC works by digitising the analog signal and splitting it into segments. For each of the segments we determine the key features of the signal and try to encode these as accurately as possible. The key features are the pitch of the signal (i.e. the basic formant frequency), the loudness of the signal and whether the sound is voiced or unvoiced. Parameters called vocal tract excitation parameters are al…

We are trying to develop an algorithm to calculate a unique numeric value for any English word. Example: School = 675237652376523 etc...

I'm looking to start learning CS just for funsies. Do any of you have suggestions for layman level books that go through how transistors work, how gates are made of transistors, how gates make processors, memory, etc.?

Recently I have been trying to understand machine learning. I have a problem that machine learning maybe can solve. In principle this is my problem( the number of individuals in the real case is more than 10 in each set ) Everyday I get 9 data sets that look like this: 1 4 9 3 2 0 2 1 4 6 8 1 3 2 1 4 3 0 4 10 3 1 5 0 5 3 2 5 1 0 6 5 6 8 7 0 . . 9 . . . . 0 10 . . . . 0 The first column is always identical and let's call them identities. In the 9 data sets I want to get a solution that will predict the postive outcome(1) in column 6. So in this…

Here's a program I wrote in Structured Basic on my C64 computer: 100 REM COMPUTING PI USING RECTANGLES 110 REM DOTS REPRESENT INDENTATIONS 120 CALL INIT 140 CALL MAIN 160 CALL OUTPUT 180 END 200 : 220 PROC INIT 240 .....TI$="000000" 260 .....A=0:B=1 280 .....N=10 300 ENDPROC 320 : 340 PROC MAIN 360 .....DX=(B-A)/N 380 .....PRINT:PRINT"DX =";DX 400 .....X=-DX 420 .....I=-1 440 .....PRINT:PRINT" I ";" X ";" Y ";" T ":PRINT 460 .....LOOP 480 ........I=I+1 500 ........X=X+DX 520 ........Y=SQR(1-X*X) 540 ........T=T+Y 560 ........PRINT I;X;Y;T 580 .....UNTIL I=N-1 600 .....PI=DX*T*4 620 ENDPROC 640 : 660 PROC OUTPUT 680 .....PRINT:PRINT"PI =";…

I am currently reviewing the potentials of cloud computing regarding energy efficiency and green IT. In connection with this review I am having a look on techniques for increasing energy-efficiency in data centers (computing), hardware, networking and storage devices. Specificially for computing/servers I have found already a few: energy-aware scheduling techniques utilizing frequency and voltage scaling virtualization to consolidate server resources energy-saving hardware, e.g. ACPI, several processor techniques, especially for mobile devices etc. However, for networking devices it is rather hard to get information about energy-saving technologies. I have read …

hello guys consider the following production rules A->Bb A->a B->Cc B->b C->Aa C->c I think the above grammar has indirect left recursion I need an equivalent grammar which is not left recursive

Hello everyone, I have searched on the internet with the same question the last several months and I never really could find the answer. Because of my great interest in computers I want to learn almost everything about it (who wouldn't?). But I really don't like surfing the web all day long so I'm searching for some well written books. These books need to prepare me for University. I have already read some good books, examples of these books: - C ++, PHP, ruby, HTML, JS etc (languages) - Algorithm and data structures - Networks Mostly, the knowledge I've gained was reading wikipedia page's of a screen. But, I want to have books that cover almost everyth…

Solve the following recurrence using a tree method 1. T(n) = T(n/2) + c 2. 3(Tn/2) + cn^2

So I am currently working on an associates for Computer Programming and am knocking out some of my basics to give me a head start when I finally transfer to a college and go towards my Computer Science Major. I am curious though as to which is or which are the best colleges for Computer Science? If I type this into google I get a lot of online colleges and ads. I was wondering what you guys thought or have heard? Which college is the one people usually consider good colleges to graduate from as a Computer Science Major? Currently, I am working on transferring to University of Houston once my associates is done at a community college.

Hey folks, So in the fall I'm going to be taking a university level microcontroller design course. It's going to be a busy quarter and I do not want to go into this cold. I have some C and programming experience, but interfacing between microcontrollers and hardware is new to me. The course is going to focus on C and work on ADC/DAC, PWM, sigma delta, memory mapping, DMA, and interrupts I believe there will be working with motors and radio. What I would like is a recommendation for a good book on this level. I'm also going to get a chip and equipment and start programming it.

I was looking up the fastest multiplication algorithms on Wikipedia. Karatsuba showed up [O(N1.585)], Strassen showed up[O(N log N log log N)], all with respectable big O scores, but a friend recently told me of an algorithm that seems to work in linear time (wrt to the number of digits in the numbers). I can't seem to find it on Google, so I'll just describe it here with an example: Suppose you have two numbers 141 and 45 and we want to multiply them. We keep dividing the first number by 2 until it becomes 1 (integer division), and keep multiplying the 2nd number the same number of times. 141 45 70 90 35 180 17 360 8 720 4 1440 2 2880 1 5760 Now, w…

Standard data correction methods, has some maximal number of errors they can correct. For example Hamming (7,4) uses 3 additional checksum bits for 4 bits of information - it works fine when there is at most 1 error per block of 7 bits. We use quite large redundancy, but is it safe now? The problem is with pessimistic cases - if expected error rate is 1/100 bits, still quite often it can happen that we have 2 errors in some of 7 bit blocks. I would like to propose some statistical approach to data correction, which allow to protect against such pessimistic cases. Thanks of this we can for example reduce redundancy to achieve similar safeness. The trick is to …

Basically, I'd like to play around with the electronic stuff here around the house. I want to experiment and explore things. I never went farther than connection 2 torn copper cables together. Those that have 4 copper wires inside, white, black red and blue (iirc). I was successful but it didn't look very professionally connected. I suppose current did run through, though. So I'm basically asking for fun things to experiment with. Something practical that I can do at home. This is a funny example: It would likely help if I told you I'm in my first year of an informatics course. It's nearly the end of the year and I've studied and learned a lot of different…

I am brand new to programming and I have no prior knowledge of programming or software other than the usual computer usage that I conduct on a day to day basis (on windows). I wondered what the difference is between Windows and Linux, why there is a difference, and what they are best used for in a programming sense? (I'm also considering learning Python as my first programming language) Any help would be greatly appreciated.