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• How is Basic Physics applied in CS/SE?

  - by Wulf

  What basic physics principles do software engineers and/or computer scientists use to help solve specific or common problems? The first one that came to my head was creating a Physics engine for a game; physics is involved, as it requires knowledge of: Forces and Motion: Kinematics, Dynamics, Circular Motion However, I need another example, but haven't come across one that involves basic physics. Please consider the following basic physics (grade 12 level) concepts: Energy and Momentum: Work and Energy, Momentum and Collisions, Gravitational and Celestial Mechanics Electric, Gravitational & Magnetic Field: Electric Charges and Electric Field, Magnetic Fields and Electomagnetism The Wave Nature of Light: Waves and Light, Wave Effects of Light Matter-Energy Interface: Einstein’s Special Theory of Relativity, Waves, Photons and Matter, Radioactivity and Elementary Particles I will be happy with any response; Keywords for google, names of methods like raycasting, etc.

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• Interview approaches and questions for a software developer intern

  - by maple_shaft

  What are some good ideas, common approaches and appropriate questions that you would bring when interviewing a software development intern to join your team? I really don't have expectations of any kind for this person, I understand that as an intern with no prior work experience that he won't have much to bring to the table. I am more or less looking for a good attitude and somebody willing to learn. What would be appropriate if you intend to put this intern 70/30 (QA Testing/Coding)? Would that be a good internship experience in your opinion?

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• Announcement: How-To Series Explaining Customizations Step By Step

  - by Oliver Steinmeier

  Yesterday we officially launched our new YouTube channel.  Today we are announcing another initiative that we have been working on for a while: to help you learn common customization tasks, we are going to publish a series of detailed How-To documents with lots of screenshots.  Many of these will also be the script for a YouTube video, giving you the choice to see it in action or go through the steps yourself guided by a PDF document. The focus of the initial set of How-Tos will be JDeveloper/ADF customizations, but over time we will expand into other areas.  Today's first document is meant to get everyone up to the point where a JDeveloper environment is up and running: a white paper that shows you how to set up JDeveloper, configure the integrated WLS domain, and make a very, very simple customization work. As always we are looking for your feedback.  Please let us know whether this is helpful for your work or learning, and what use cases you would like to see us document in these How-Tos.

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• 6 Steam Troubleshooting Tips

  - by Chris Hoffman

  Steam is generally pretty stable, but every now and then you’ll run into a problem. This guide gives solutions to common problems you’ll encounter in Steam, from games crashing or not working properly to Steam failing to launch. If none of these solutions helps, try Googling the problem – you may have run into a game-specific problem with a game-specific solution or just a more obscure Steam bug. HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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• Quality Assurance tools discrepancies

  - by Roudak

  It is a bit ironic, yesterday I answered a question related to this topic that was marked to be good and today I'm the one who asks. These are my thoughts and a question: Also let's agree on the terms: QA is a set of activities that defines and implements processes during SW development. The common tool is the process audit. However, my colleague at work agrees with the opinion that reviews and inspections are also quality assurance tools, although most sources classify them as quality control. I would say both sides are partially right: during inspections, we evaluate a physical product (clearly QC) but we see it as a white box so we can check its compliance with set processes (QA). Do you think it is the reason of the dichotomy among the authors? I know it is more like an academic question but it deserves the answer :)

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• AGPL License - does it apply in this scenario?

  - by user1645310

  There is an AGPLv3 based software (Client) that makes web service calls (using SOAP) to another software (Server - commercial, cloud based). There is no common code or any connection whatsoever between these two except for the web service calls being made. My questions - Does the Server need to be AGPL too? I guess not - but would like to confirm. Let us say the end point URL for the Server can be configured on the Client side (by editing an XML file) to connect it to different Servers (again, there is no connection other than the webservice calls being made) does it require any of these Servers being AGPL? Are there any issues in running the Client as a DLL that is loaded by other commercial applications on users' desktops? Does it require these other applications also to be AGPL?

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• Oracle Launches Mobile User Experiences Design Patterns

  - by asantaga

  Mobile design requires a different way of thinking. Use Oracle’s mobile design patterns to design iPhone, Android, or browser-based smartphone applications.  We are sharing our mobile design patterns and their baked-in, scientifically proven usability to enable Oracle customers and partners to build mobile apps quickly. Our design patterns are common solutions that developers can easily apply across all application suite products. Crafted by our insight into Oracle Fusion Middleware, the patterns are designed to work with the mobile technology provided by the Oracle Application Development Framework.  Normal 0 false false false false EN-US JA X-NONE

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• Which isometric angles can be mirrored (and otherwise transformed) for optimization?

  - by Tom

  I am working on a basic isometric game, and am struggling to find the correct mirrors. Mirror can be any form of transform. I have managed to get SE out of SW, by scaling the sprite on X axis by -1. Same applies for NE angle. Something is bugging me, that I should be able to also mirror N to S, but I cannot manage to pull this one off. Am I just too sleepy and trying to do the impossible, or a basic -1 scale on Y axis is not enough? What are the common used mirror table for optimizing 8 angle (N, NE, E, SE, S, SW, W, NW) isometric sprites?

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• Develop a small size software using C only for copying same data to multiple external drives simultaneously [on hold]

  - by VSP

  I want to develop a software that can copy the same data to multiple external drives, simultaneously. For example, consider a file Movie and I have 3 external drives to copy it to, and I want to copy Movie to all these 3 drives(these drives can be flash storage or external hard-disk or pen-drive etc. but have one thing in common, i.e. they are all external drives) at the same time, means when I right-click on Movie there has to be 1 option saying Copy to All Drives. It's a sort of mini-project and I want to use C language only. For starting I would like it to work only on Windows OS. What are the requirements of developing this software (not the system requirements but what will I need to develop such a software, like editor,compiler etc.)? I know this type of software must have already been developed but I want to use C language and C Language only. So, is it possible to develop such a software?

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• Video: Coherence Community on Java.net - 4 Projects available under CDDL-1.0

  - by OTN ArchBeat

  If you work with Oracle Coherence and you're not familiar with the Coherence Community on Java.net you're missing out. The Coherence Community was launched on Java.net in June 2013, operating under the Open Source Initiative's Common Development and Distribution License (CDDL-1.0). Four projects are currently available for your participation: Coherence Hibernate Integration Coherence Spring Integration Oracle Tools The Coherence Incubator You'll learn a lot more about the Coherence Community in the video above, which features my conversation with Oracle Coherence Senior Principal Solutions Architect Brian Oliver and Oracle Coherence Consulting Solutions Architect Randy Stafford, two of the people behind the creation and management of the Community and it's projects.

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• How do you cope mentally with one very long piece of work

  - by Asher Einhorn

  This is my first games industry job and my task is to take out one major game component and put in a newer one. So far it's been 5 weeks, and I'm still just staring at errors. I think it could be months before it's at the point that it can compile. It's really getting me down. I'm just changing things over, I'm not really writing anything myself. it's just endless. I fix a thousand errors and nine thousand take their place. I'm sure this must be a common thing, so I was just wondering, how do you cope with this? It doesn't seem like I can break it down into little chunks at all.

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• Coherence Query Performance in Large Clusters

  - by jpurdy

  Large clusters (measured in terms of the number of storage-enabled members participating in the largest cache services) may introduce challenges when issuing queries. There is no particular cluster size threshold for this, rather a gradually increasing tendency for issues to arise. The most obvious challenges are that a client's perceived query latency will be determined by the slowest responder (more likely to be a factor in larger clusters) as well as the fact that adding additional cache servers will not increase query throughput if the query processing is not compute-bound (which would generally be the case for most indexed queries). If the data set can take advantage of the partition affinity features of Coherence, then the application can use a PartitionedFilter to target a query to a single server (using partition affinity to ensure that all data is in a single partition). If this can not be done, then avoiding an excessive number of cache server JVMs will help, as will ensuring that each cache server has sufficient CPU resources available and is also properly configured to minimize GC pauses (the most common cause of a slow-responding cache server).

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• Creating an online community - use templates or self-develop?

  - by ican ican

  PHPMotion, Joomla or develop my own? I'm thinking of developing a common interest online community. It will be have UGC, stats, etc.. functionality, and perhaps an online store. Though cost is an issue at this time, I want to be professional and effective. Should I use existing free platform templates, like PHP, Joomla, or should I develop my own? What are the advantages/disadvantages of either option? As a rough estimate, how much will it cost me to develop and manage my own? And how long will it take. In general what should I be careful about on this journey?

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• QotD: Eben Upton on Raspberry Pi Model B Shipping With 512MB of RAM

  - by $utils.escapeXML($entry.author)

  One of the most common suggestions we’ve heard since launch is that we should produce a more expensive “Model C” version of Raspberry Pi with extra RAM. This would be useful for people who want to use the Pi as a general-purpose computer, with multiple large applications running concurrently, and would enable some interesting embedded use cases (particularly using Java) which are slightly too heavyweight to fit comfortably in 256MB.The downside of this suggestion for us is that we’re very attached to $35 as our highest price point. With this in mind, we’re pleased to announce that from today all Model B Raspberry Pis will ship with 512MB of RAM as standard.Eben Upton, a founder and trustee of the Raspberry Pi foundation, in a blog post announcing the change.

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• What software development model has worked best for software teams with heavy dependancy on hardware teams?

  - by MasterDIB

  So, let me explain more. There are a number of competing best practices for software development. I can find that many teams have benefited from Agile practices in some cases. In some other cases, using the Unified Process has been championed by large companies like IBM. The common themes that I find seemed to work well for teams that mainly develop software. I am interested to know what has worked best for people who have worked in shops where there is a team on the other side that produce the hardware that your software is running on. For example, one team puts together a crate with several custom hardware on it; while you need to develop the software that would run on those crates. I can't find a development model (agile, spiral ...) that works best in this case. Any wisdom is this area will be well appreciated.

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• What is the concept behind writing a cancel operation in c++?

  - by ToMan

  I'm attempting to write a cancel operation for a software download application. This application will first transfer the software to the device and then install the software on it. (These are givens I'm not allowed to change). What should the cancel operation do? When a user presses 'cancel', the application should stop transferring/installing the software immediately. Question: Since I've never written a "cancel" function, I'm wondering what are the types of things to consider when writing the code, and what are the common bugs I should expect and how to deal with them? Couldn't find anything in google so if you have some links that would be good reads I'd really appreciate it since I'm not looking for answers I'm just looking for guidelines/macro/concept help

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• Separating merged array of arithmetic and geometric series

  - by user1814037

  Given an array of positive integers in increasing order. Separate them in two series, an arithmetic sequence and geometric sequence. The given array is such that a solution do exist. The union of numbers of the two sequence must be the given array. Both series can have common elements i.e. series need not to be disjoint. The ratio of the geometric series can be fractional. Example: Given series : 2,4,6,8,10,12,25 AP: 2,4,6,8,10,12 GP: 4,10,25 I tried taking few examples but could not reach a general way. Even tried some graph implementation by introducing edges if they follow a particular sequence but could not reach solution.

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• ASP.NET 3.5 Gridview Hyperlink Columns

  One of the most common applications of GridView tables in ASP.NET 3.5 involves hyperlinks. The hyperlink can be database-driven which means it will retrieve hyperlink information from the MS SQL server database in the form of URLs or part of complete URLs. Adding hyperlinks to the Gridview columns can be accomplished using the hyperlinkfield. ... Business Productivity Online Suite From $10 per user per month. Includes a 12-month subscription. Min 5 seats.

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• Trouble Setting up Open SSH with Putty

  - by warpstack

  I for the life of me can't seem to get openSSH to work on Ubuntu Server 10.10 with keys I generated in PuttyGen on my Windows machine. After hours of trial and error and web searches I can't get my ssh service to accept my private key! Here is my sshd_config. I generated my public and private keys using Putty in Windows then used a ssh connection to paste my key from putty directly into my authorized_keys2 file located in */etc/ssh/publickeys/authorized_keys2* The authorized_keys2 file looks something like: ssh-rsa AAAAB3NzaC1yc2EAAAA... with no email or anything at the end of it. I just pasted it straight from PuttyGen without using a key comment. I feel like it's not working because of some nuance I am not understanding or some unusual setting or incompatibility. I've restarted the ssh service (and the machine) to no avail. What are some common pitfalls I might have gotten myself into? Is there a simpler way to generate ssh keys that putty can use in windows?

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• Testing what is happening inside your BizTalk solution

  - by Michael Stephenson

  As BizTalk developers we all know that one of the common challenges is how to test your BizTalk solution once it is deployed to BizTalk. Hopefully most of us are using the BizUnit framework for testing, but we still have the limitation that it's a very Black Box test. I have put together a sample and video to show a technique where I'm using the Logging Framework from the BizTalk CAT Team at Microsoft and where by BizUnit test is able to make assertions against the instrumentation going through the framework. This means that I can test for things happening such as the fact a component was executed or which branch of an orchestration was executed by simply using my normal instrumented code. I've put the sample and video for this on the following codeplex site: http://btsloggingeventsinbi.codeplex.com/ The video should also be on cloud casts fairly soon too.

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• Should an object know its own ID?

  - by xenoterracide

  obj.id seems fairly common and also seems to fall within the range of something an object could know about itself. I find myself asking why should my object know its own id? It doesn't seem to have a reason to have it? One of the main reason for it existing is retrieve it, and so my repositories need to know it, and thus use it for database interaction. I also once encountered a problem where I wanted to serialize an object to JSON for a RESTful API where the id did not seem to fit in the payload, but only the URI and including it in the object made that more difficult. Should an object know it's own id? why or why not?

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• What's the term describing this system for generating user interfaces?

  - by mjfgates

  So, there's this idea, which you already know: Define the layout of your UI by creating a tree of panels. The leaf nodes on the tree are what we used to call 'controls' way back in the day-- the things that the user interacts with, radio buttons and listboxes and such. The internal nodes are mostly concerned with layout; this kind of panel stacks its child panels vertically, that kind puts its children into a grid, etc. It's COMMON. Most of the UI-generating systems I've seen in the past twenty years are implementations of this, and the ones that aren't borrow from it. What's the word for this idea?

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• How to check if my open source idea already exists?

  - by Andreas

  I've got a great idea for an open source project. What should I do before starting, to make sure that I'm not duplicating anyone's efforts? Of course I've googled, but which keywords to use isn't obvious. Is there a site to discuss such ideas? To address a common answer: My goal is not to be the author of a successful project. It is to make sure that this product exists, and can be improved. (There's already a similar commercial venture, which is of low quality and not being developed.) Thus, it won't help me to have the only project that can be found in this niche. If there's a start out there, I'd like to find it and help.

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• How to create reproducible probability in map generation?

  - by nickbadal

  So for my game, I'm using perlin noise to generate regions of my map (water/land, forest/grass) but I'd also like to create some probability based generation too. For instance: if(nextInt(10) > 2 && tile.adjacentTo(Type.WATER)) tile.setType(Type.SAND); This works fine, and is even reproduceable (based on a common seed) if the nextInt() calls are always in the same order. The issue is that in my game, the world is generated on demand, based on the player's location. This means, that if I explore the map differently, and the chunks of the map are generated in a different order, the randomness is no longer consistent. How can I get this sort of randomness to be consistent, independent of call order? Thanks in advance :)

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• Who should respond to collision: Unit or projectile?

  - by aleguna

  In an RTS if a projectile hits a unit. Who should handle the collision? If projectile handles the collision, it must be aware of all possible types of units, to know what damage to inflict. For example a bullet will likely kill a human, but it will do nothing to a tank. The same goes if unit handles a collision. So either way one of them should be aware of all possible types of the other. Of course the 'true' way would be to do full physics simulation, but that's not an option for an RTS with 1000s of units and projectiles... So what are the common practicies in this regards?

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