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Search found 562 results on 23 pages for 'discrete mathematics'.

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• What types of programming require practical category theory?

  - by Alexander Gruber

  Category theory has applications in theoretical computer science and obviously is central to abstract mathematics. I have heard that it also has direct practical applications in programming and software development. What type of programming is practical category theory necessary for? What do programmers use category theory to accomplish? Please note my use of "necessary" and "require" in this post. I realize that in some sense most programmers will benefit from having experience in different types of theories, but I am looking for direct applications where the usage of category theory is essential, i.e. if you didn't know category theory, you probably couldn't do it. Also, I'd like to clarify that by "what type of programming," I am hoping less for a broad answer like "functional programming," and more for specific applications like "writing bank software" or "making operating systems."

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• Multiple Monitors using nvidia-prime or bumblebee on Ubuntu 13.10

  - by user205626

  I've been unable to get multiple monitors to work with Ubuntu 13.10 using nvidia-prime or bumblebee. Could someone point me in the right direction? With nvidia-prime, I've tried the xorg.conf here http://us.download.nvidia.com/XFree86/Linux-x86/319.12/README/randr14.html, but I boot into "low graphics" mode and have to revert to get a desktop back. Any suggestions would be appreciated. Thanks. Edit: I've given up on nvidia-prime; I missed the fact that it never turns off the discrete card... So, I'm back to trying to get VIRTUAL displays working with Bumblebee.

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• Physics-based dynamic audio generation in games

  - by alexc

  I wonder if it is possible to generate audio dynamically without any (!) audio assets, using pure mathematics/physics and some input values like material properties and spatial distribution of content in scene space. What I have in mind is something like a scene, with concrete floor, wooden table and glass on it. Now let's assume force pushes the glass towards the edge of table and then the glass falls onto the floor and shatters. The near-realistic glass destruction itself would be possible using voxels and good physics engine, but what about the sound the glass makes while shattering? I believe there is a way to generate that sound, because physics of sound is fairly known these days, but how computationaly costy that would be? Consumer hardware or supercomputers? Do any of you know some good resources/videos of such an experiment?

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• what is itunes result sorted by ?

  - by NemesisII

  This is my App on Itunes: http://itunes.apple.com/us/app/buddy-calculator/id445261163?mt=8 My app Key word is : "calculator scientific calc equation math mathematics unit converter conversion statistic algebra" But when I search "Calculator" on Itunes, my app is not appeared (in first two pages). So I want to ask a question that how to improve the rank of my app , and what is the searched result sorted by (new first, vote or downloaded or ...) ? If I want to improve the rank, how can I do, does it cost fee or something ? Thanks you very much ^^ !

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• Smooth vector based jump

  - by Esa

  I started working on Wolfire's mathematics tutorials. I got the jumping working well using a step by step system, where you press a button and the cube moves to the next point on the jumping curve. Then I tried making the jumping happen during a set time period e.g the jump starts and lands within 1.5 seconds. I tried the same system I used for the step by step implementation, but it happens instantly. After some googling I found that Time.deltatime should be used, but I could not figure how. Below is my current jumping code, which makes the jump happen instantly. while (transform.position.y > 0) { modifiedJumperVelocity -= jumperDrag; transform.position += new Vector3(modifiedJumperVelocity.x, modifiedJumperVelocity.y, 0); } Where modifiedJumperVelocity is starting vector minus the jumper drag. JumperDrag is the value that is substracted from the modifiedJumperVelocity during each step of the jump. Below is an image of the jumping curve:

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• UPK Pre-Built Content Update

  - by Karen Rihs

  UPK pre-built content development efforts are always underway and growing. Over the last few months, the following new and upgraded modules became available:  NEW CONTENT RELEASES E-Business Suite 12.1 Field Service Manufacturing Operations Center Process Manufacturing:  System Administration Strategic Network Optimization U.S. Federal Financials Oracle Communications 11.1 Oracle Communications UPK for Pricing Design Center, Voice and Data Offerings Oracle Mobile Workforce 2.1.0 Administrative Setup User Tasks Primavera Primavera Portfolio Management 9.0 UPK CONTENT UPGRADES JDE E1 9.1 HCM Fundamentals for EnterpriseOne Manufacturing - Product Data Management Manufacturing Management Discrete Shop Floor Management Procurement and Subcontract Management JDE World A9.3 Accounts Payable Address Book  Common Foundation General Ledger For a list of modules currently available for each product line, visit the UPK Resource Library on Oracle.com. For more information on how your organization can take advantage of UPK pre-built content, see our previous blog,  The Value of UPK Pre-Built Content. - Karen Rihs, UPK Outbound Product Management

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• Ubuntu 14.04LTS - runtime video card configuration through Radeon driver

  - by RJVB

  How does one configure Radeon video cards when using the open source Radeon driver - power profile, vsync, etc? Why I try the widely documented solution (against overheating) that worked for me under LMDE (confirmed with kernels up to 3.12.6), I get the following error: $ sudo cat /sys/class/drm/card0/device/power_profile default $ sudo sh -c "echo mid > /sys/class/drm/card0/device/power_profile" sh: echo: I/O error Exit 1 And when I try suggestions from Arch's ATI wiki my modifications are simply ignored: $ sudo cat /sys/class/drm/card0/device/power_dpm_force_performance_level auto $ sudo sh -c "echo high> /sys/class/drm/card0/device/power_dpm_force_performance_level" $ sudo cat /sys/class/drm/card0/device/power_dpm_force_performance_level auto Is this something Ubuntu specific, or something introduced with the 3.13 version of the Radeon driver? I'm encountering this on 2 laptops, one with a Radeon HD6290 (integrated GPU), the other with a discrete RV710 card. The RV710 needs a specific power setting to prevent overheating under LMDE, fortunately it doesn't seem to overheat with the Ubuntu default setting.

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• DOT implementation

  - by Denis Ermolin

  I have some DOT(damage over time) implementation problems. My game runs on 30 FPS speed. Current implementation is: let's say hero cast spell which make 1 damage per second. So on every frame i do (pseudo code): damage_done = getRandomDamage() * delta_time; I accumulate damage and when it becomes more then 0 then subtract rounded damage from current health and so on. With 30 FPS and 1 DPS it will be 1/33 = 0.05... We know that floats a not precise enough to sum 30 circulating decimals and have exact 1 in the end. But HP is discrete value and that's why 1 DPS will not have 1 damage after 1 second because value will be 0.9999..... It's not so big deal when you have 100000 DPS - +/- 1 damage will not be noticeable. But if i have 1, 5 DPS? How modern RPG's implemented DOT's?

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• How Can Someone With Minimum Programming Experience Publish an App of an Existing Program not found in the Software Centre?

  - by Brenton Horne

  There's a free mathematics software that I would like to see in Ubuntu Software Centre, called, 'Sage.' I have minimal experience in programming, so I'm basically here asking if someone could either tell me how to accomplish this without said instructions being completely over my head or if someone could do it for me. For further information here's the sage homepage: http://sagemath.org/ and the .tar.lzma file for its installation is ~500MB and it takes around 2.2 GB on the HDD when installed, I found at least on 32 bit i386 Ubuntu 12.04 LTS. Any help will be greatly appreciated!

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• What triggered the popularity of lambda functions in modern programming languages?

  - by Giorgio

  In the last few years anonymous functions (AKA lambda functions) have become a very popular language construct and almost every major / mainstream programming language has introduced them or is planned to introduce them in an upcoming revision of the standard. Yet, anonymous functions are a very old and very well-known concept in Mathematics and Computer Science (invented by the mathematician Alonzo Church around 1936, and used by the Lisp programming language since 1958, see e.g. here). So why didn't today's mainstream programming languages (many of which originated 15 to 20 years ago) support lambda functions from the very beginning and only introduced them later? And what triggered the massive adoption of anonymous functions in the last few years? Is there some specific event, new requirement or programming technique that started this phenomenon?

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• Numerical stability in continuous physics simulation

  - by Panda Pajama

  Pretty much all of the game development I have been involved with runs afoul of simulating a physical world in discrete time steps. This is of course very simple, but hardly elegant (not to mention mathematically inaccurate). It also has severe disadvantages when large values are involved (either very large speeds, or very large time intervals). I'm trying to make a continuous physics simulation, just for learning, which goes like this: time = get_time() while true do new_time = get_time() update_world(new_time - time) render() time = new_time end And update_world() is a continuous physical simulation. Meaning that for example, for an accelerated object, instead of doing object.x = object.x + object.vx * timestep object.vx = object.vx + object.ax * timestep -- timestep is fixed I'm doing something like object.x = object.x + object.vx * deltatime + object.ax * ((deltatime ^ 2) / 2) object.vx = object.vx + object.ax * deltatime However, I'm having a hard time with the numerical stability of my solutions, especially for very large time intervals (think of simulating a physical world for hundreds of thousands of virtual years). Depending on the framerate, I get wildly different solutions. How can I improve the numerical stability of my continuous physical simulations?

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• ati graphics always on

  - by naveen

  i use a lenovo y560 and has ubunto 12.04 and win 7 installed when i boot into ubunto i find that the ati car is always on which drains the battery and overheats the system is there any to switch off the ati graphics and use intel hd in ubuntu ati hd 5730 is the graphics card that i use and it has switchable graphics in it. in bios the only two options for video adapter is discrete and switchable after installing ati driver from amd website i am getting a commamd prompt as log in screen first error message comes as Your system is running in low-graphics mode with options to run in low graphics mode this time reconfigure exit all three options i am stuck i need to manually reboot the system

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• Enterprise Trade Compliance: Changing Trade Operations around the World

  - by John Murphy

  We live in a world of incredible bounty and speed where any product can be delivered anywhere on earth. However, our world is also filled with challenges for business – where volatility, uncertainty, risk, and chaos are our daily companions. To prosper amid the realities of this new world, organizations cannot rely on old strategies; they need new business models. Key trends within the global economy are mandating that companies fully integrate global trade management best practices within broader supply chain management strategies, rather than simply leaving it as a discrete event at the end of the order or procurement cycle. To explain, many companies face a complicated and changing compliance environment. This is directly linked to the speed and configuration of the supply chain, particularly with the explosion of new markets, shorter service cycles and ship times, accelerating rates of globalization and outsourcing, and increasing product complexity and regulation. Read More...

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• An intern interview with Microsoft [on hold]

  - by Wobbles

  I'm currently in my second year(Computer Science and Mathematics). In two days I have an interview on campus with Microsoft. I'm a bit nervous, because this will be my first in person interview. I have done reviewed basic things like linked list and binary trees. I am not really sure what kinds of questions I'll be asked. Has anyone been to such interview? If so what's it like? What kinds of questions will I be asked? Any help/suggestions will be much appreciated! Also can someone provide me with a list of things I ought to know for the interview?

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• Career Advice: masters degree or work experience [on hold]

  - by user95488

  I graduated about four years ago with a degree in mathematics and I currently work as a Software Developer/Business Analyst, but more Business Analyst. I've been working for about 4 years and and I am concerned with my long term career path. I would strongly prefer to do much more software development but to continue on my current path would lead me to an analyst role. I was thinking of getting a masters in computer science to help refocus my career toward core software development. Does anyone have any advice here? Is this a bad idea?

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• why would you use textures that are not a power of 2?

  - by Will

  In the early days of OpenGL and DirectX, it was required that textures were powers of two. This meant that interpolation of float values could be done very quickly using shifting and such. Since OpenGL 2.0, and preceding that via an extension, non-power-of-two texture dimensions has been supported. Are there performance advantages to sticking to power-of-two textures on modern integrated and discrete GPUs? What advantages do non-power-of-two textures have, if any? Are there large populations of desktop users who don't have cards that support non-power-of-two textures?

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• T420 Triple Head with Optimus

  - by Rolo

  I see that this is possible on a T520 apparently (Triple-head on a Lenovo T520), but I can't see anyone claiming it's possible on a T420. I'm running 12.04 and have Bumbleebee installed and working fine but I can't get the display port monitor to display anything. The power light flicks on, but things only render on my VGA output monitor, and Ubuntu's display settings don't detect the third monitor. I'm not concerned with power management, ie, am happy to leave set on discrete graphics in the BIOS if that helps. Is this possible? Thanks.

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• Record and display Kinect audio and video via avconv

  - by ThomasH

  I'm trying to record audio and video from a Kinect using avconv but I seem to have trouble specifying the right options. avconv -f video4linux2 -video_size 640x480 -c:v h264 -c:a ac3 -i /dev/video1 test.mp4 results in: avconv: /build/buildd/libav-extra-0.8.3ubuntu0.12.04.1/libav/libavutil/mathematics.c:79: av_rescale_rnd: Assertion `c > 0' failed. Aborted (core dumped) Cheese is perfectly happy recording the audio and video from the Kinect, so it's not a setup issue. For added fun, I also need to display the video at the same time.

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• What classes are useful for an aspiring software developer? [closed]

  - by Anonymouse

  I'm a freshman in college trying to graduate in 3 years with a Math/CS dual major, and I don't have a lot of time to be fooling around with useless classes. I've tested out of most of my gen eds and science-y courses, but I need to know: what math and cs courses are most important for someone interested in algorithm development? Math courses already taken: Calc I-III,Linear Algebra, Discrete Math. CS courses taken: Java. Math courses I'm planning to take: ODE, Linear Algebra II, Vector calc, Logic, (Analysis or Algebra), Stats, probability CS courses I'm planning to take: C(required), Data Structures, Numerical Methods, Intro to Analysis of Algorithms. Which is better, analysis or algebra? Did I take enough CS courses? Am I missing out on anything? Thanks.

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• Google et le CNRS s'associent dans un partenariat, pour soutenir la recherche en informatique dans le domaine de l'optimisation

  Google et le CNRS s'associent dans un partenariat, pour soutenir la recherche en informatique dans le domaine de l'optimisation Mercredi, une annonce discrète a été faite, dont l'importance est pourtant capitale. Google a ainsi annoncé s'être associé au CNRS (le Centre National de la Recherche Scientifique), un "accord conjoint" qui est une "première en France", dont le but est de "développer un partenariat scientifique durable". Les deux organismes vont ainsi, ensemble, soutenir cinq équipes de recherche en informatique spécialisée dans l'optimisation, qui sont : - l'équipe de Denis Trystram au Laboratoire d'informatique de Grenoble (CNRS/Université de Grenoble 1, 2 et 3/...

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• I.T. degree for game programming?

  - by user6175

  Hi, I am a 19 year old who has always been interested in video & computer games. I developed the interested for game programming about three months ago and started researching on the profession. The only degrees always suggested on the internet and in books are those of computer science, physics, mathematics, & game development. BSc Information Technology has been my major for the past two years; and even though my university teaches we the I.T. students computer programming (in c++, c#, java) and offers us the opportunity to undertake some computer science courses of our choice in addition to the regular I.T. courses, I am feeling insecure about my prospects in getting into the profession. My question is: Will a game development company hire me if I exhibit good math, physics and game programming skills with an I.T. degree? If NO, will I have to obtain an MSc in a much more related course.

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• Can I use HDMI with the Intel card of my optimus laptop?

  - by Byakkun

  I have an Dell Inspiron 7110 that has a Sandy bridge i7 and a discrete graphics card (GeForce 525M) from Nvidia. I want to be able to use my 23' display at home throungh hdmi but Intel integrated graphics card does not work with hdmi (VGA is not an option). I have tried bumblebee but it does not work. How could I use the hdmi port for my monitor. Using only the nvidia card with some driver is what I tought i could do but i don't want to give up composing because I use gnome-shell. Any options for doing this?

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• Algorithm development in jobs

  - by dbeacham

  I have a mathematics background but also consider career in some form of software development. In particular I'm interested in finding out what sort of industries are most likely to have more algorithm development/mathematical and logical problem solving slant rather than pure application development etc. Obviously, I'm assuming that some subset of the canonical data structures and associated algorithms (trees, lists, hash tables, sets, maps with search, insert, traversals etc.) are mostly going to be present in software development. However, where am I more likely to encounter problems of more discrete maths nature (combinatorial, graph theory, sets, strings, ...) explicitly or more likely in disguise. Any pointers much appreciated (including possible open source projects that I could use for my further search for applications and also possibly contribute to).

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• Is ROA a specific form of doing SOA?

  - by JohnDoDo

  I have read somewhere that ROA (Resource Oriented Architecture) is SOA (Service Oriented Architecture) with specific constraints added. SOA is the abstract concept of combining discrete pieces of software and ROA is an implementation of SOA with all of the constraints of RESTful services applied to it: SOA = the concept ROA = the concept + specific implementation details I also had my share of posts saying that ROA is different than SOA, then simply fallback to statements like "ROA is REST" and "SOA is SOAP" and presenting the same more or less pertinent comparisons and differences between SOAP and REST. So just to clear up my confusion: Is ROA a specific form of doing SOA?

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• Computer Science Career Advice: Master's in Computer Science vs. Software Engineering?

  - by Everton

  Hello, I am a college student and I am majoring in Computer Science and Applied Mathematics. As I get closer to my senior year I have noticed that continuing my studies is the best choice right for me now. I see that several universities offer an Computer Science Master's Degree and an Software Engineering degree. What are their pros and cons? I feel that while the Computer Science master's degree seems a little too broad the Software Engineering is too restrictive. I did not decide yet between an career of Software development or research ( algorithm development among other things ). Any advice would be greatly apreciated!

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