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  • A Method for Reducing Contention and Overhead in Worker Queues for Multithreaded Java Applications

    - by Janice J. Heiss
    A java.net article, rich in practical resources, by IBM India Labs’ Sathiskumar Palaniappan, Kavitha Varadarajan, and Jayashree Viswanathan, explores the challenge of writing code in a way that that effectively makes use of the resources of modern multicore processors and multiprocessor servers.As the article states: “Many server applications, such as Web servers, application servers, database servers, file servers, and mail servers, maintain worker queues and thread pools to handle large numbers of short tasks that arrive from remote sources. In general, a ‘worker queue’ holds all the short tasks that need to be executed, and the threads in the thread pool retrieve the tasks from the worker queue and complete the tasks. Since multiple threads act on the worker queue, adding tasks to and deleting tasks from the worker queue needs to be synchronized, which introduces contention in the worker queue.” The article goes on to explain ways that developers can reduce contention by maintaining one queue per thread. It also demonstrates a work-stealing technique that helps in effectively utilizing the CPU in multicore systems. Read the rest of the article here.

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  • What defines good developer culture? [closed]

    - by Sven
    We are a team of 6 people developing applications for mobile devices (Android & iOS). In our company, which consists of many teams responsible for "classic" software development, business intelligence, virtualization, hardware, etc., we are kind of a small startup because we were the first to use agile methods like Scrum and we are open to new technologies and methods. Also our team is pretty young with me being the oldest with 30 years. We would like to further raise productivity and motivation and thus are currently collecting points which make up a good developer/hacker culture and which may be improved in our team/company. This can be points that we can either improve ourselves or have to pass on to management. I would like to know what in your opinion defines good, modern developer culture? What does developer culture consists of? For example is it clearly defined career opportunities geeky office benefits like trips to extraordinary conferences like WWDC or Google I/O ...

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  • Byte Size Tips: How to Stop OS X from Changing the Display Brightness Automatically

    - by The Geek
    After getting a new MacBook Air and deciding to try out OS X for a while, I started wondering why the battery would suddenly start dying really fast, but only when I was sitting at the kitchen table. That’s when I noticed the display brightness kept changing on its own… and realized the problem. OS X, just like your phone, and any modern device, tries to figure out the brightness of the room you’re in, and adjust the brightness of the screen. If you are over in Windows, it’s called “Adaptive” brightness, while your phone will just call it “Auto”. While this technology is great in theory, I don’t really need max brightness all the time, and I like to control it manually to make sure I’m getting the best battery life. Open up System Preferences, head to Displays. Then uncheck the Automatically adjust brightness setting.     

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  • Alternative ways to make a battle system in a mobile indie game more fun and engaging

    - by Matt Beckman
    I'm developing an indie game for mobile platforms, and part of the game involves a PvP battle system (where the target player is passive). My vision is simple: the active player can select a weapon/item, then attack/use, and display the calculated outcome. I have a concept for battle modifiers that affect stats to make it more interesting, but I'm not convinced this by itself will add enough of a fun factor. I've received some inspiration from the game engine that powers Modern War/Kingdom Age/Crime City, but I want more control to make it more fun. In those games, you don't have the option to select weapons or use items, and the "battling" screen is simply 3D eye candy. Since this will be an indie game, I won't be spending $$$ on a team of professional 3D artists/animators, so my edge needs to be different. What are some alternatives to expensive eye candy that you or others have used to make a non-3D PvP game more fun and engaging? Did the alternative concepts survive the release?

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  • Powder games: how do they work?

    - by Marc Müller
    Hey guys, I recently found these two gems: http://powdertoy.co.uk/ http://dan-ball.jp/en/javagame/dust/ My question is: How are the physics with so many elements efficiently handled? Am I just severely underestimating modern computing power or is it possible to 'just' have a two-dimensional array, each cell of which describes what is placed at the according position and simulate each cell in every step. Or are there more complex things being done like summarising large areas of the same kind into a single data set and separating said set as needed? Are there any open-source games like this I could look at?

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  • Star Trail Photos Taken from the International Space Station

    - by Jason Fitzpatrick
    While most people have seen a star trail photo or two, seeing a set of star trail photos taken from over 300 miles above the Earth’s surface is a treat. Courtesy of Astronaut and Expedition 31 Flight Engineer Don Pettit, the photos capture star trails from the vantage point of the International Space Station. He explains his technique: My star trail images are made by taking a time exposure of about 10 to 15 minutes. However, with modern digital cameras, 30 seconds is about the longest exposure possible, due to electronic detector noise effectively snowing out the image. To achieve the longer exposures I do what many amateur astronomers do. I take multiple 30-second exposures, then ‘stack’ them using imaging software, thus producing the longer exposure. Hit up the link below for the full Flickr set of the star trails. ISS Star Trails [via Smithsonian Magazine] 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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  • How to Play PC Games on Your TV

    - by Chris Hoffman
    No need to wait for Valve’s Steam Machines — connect your Windows gaming PC to your TV and use powerful PC graphics in the living room today. It’s easy — you don’t need any unusual hardware or special software. This is ideal if you’re already a PC gamer who wants to play your games on a larger screen. It’s also convenient if you want to play multiplayer PC games with controllers in your living rom. HDMI Cables and Controllers You’ll need an HDMI cable to connect your PC to your television. This requires a TV with HDMI-in, a PC with HDMI-out, and an HDMI cable. Modern TVs and PCs have had HDMI built in for years, so you should already be good to go. If you don’t have a spare HDMI cable lying around, you may have to buy one or repurpose one of your existing HDMI cables. Just don’t buy the expensive HDMI cables — even a cheap HDMI cable will work just as well as a more expensive one. Plug one end of the HDMI cable into the HDMI-out port on your PC and one end into the HDMI-In port on your TV. Switch your TV’s input to the appropriate HDMI port and you’ll see your PC’s desktop appear on your TV.  Your TV becomes just another external monitor. If you have your TV and PC far away from each other in different rooms, this won’t work. If you have a reasonably powerful laptop, you can just plug that into your TV — or you can unplug your desktop PC and hook it up next to your TV. Now you’ll just need an input device. You probably don’t want to sit directly in front of your TV with a wired keyboard and mouse! A wireless keyboard and wireless mouse can be convenient and may be ideal for some games. However, you’ll probably want a game controller like console players use. Better yet, get multiple game controllers so you can play local-multiplayer PC games with other people. The Xbox 360 controller is the ideal controller for PC gaming. Windows supports these controllers natively, and many PC games are designed specifically for these controllers. Note that Xbox One controllers aren’t yet supported on Windows because Microsoft hasn’t released drivers for them. Yes, you could use a third-party controller or go through the process of pairing a PlayStation controller with your PC using unofficial tools, but it’s better to get an Xbox 360 controller. Just plug one or more Xbox controllers into your PC’s USB ports and they’ll work without any setup required. While many PC games to support controllers, bear in mind that some games require a keyboard and mouse. A TV-Optimized Interface Use Steam’s Big Picture interface to more easily browse and launch games. This interface was designed for using on a television with controllers and even has an integrated web browser you can use with your controller. It will be used on the Valve’s Steam Machine consoles as the default TV interface. You can use a mouse with it too, of course. There’s also nothing stopping you from just using your Windows desktop with a mouse and keyboard — aside from how inconvenient it will be. To launch Big Picture Mode, open Steam and click the Big Picture button at the top-right corner of your screen. You can also press the glowing Xbox logo button in the middle of an Xbox 360 Controller to launch the Big Picture interface if Steam is open. Another Option: In-Home Streaming If you want to leave your PC in one room of your home and play PC games on a TV in a different room, you can consider using local streaming to stream games over your home network from your gaming PC to your television. Bear in mind that the game won’t be as smooth and responsive as it would if you were sitting in front of your PC. You’ll also need a modern router with fast wireless network speeds to keep up with the game streaming. Steam’s built-in In-Home Streaming feature is now available to everyone. You could plug a laptop with less-powerful graphics hardware into your TV and use it to stream games from your powerful desktop gaming rig. You could also use an older desktop PC you have lying around. To stream a game, log into Steam on your gaming PC and log into Steam with the same account on another computer on your home network. You’ll be able to view the library of installed games on your other PC and start streaming them. NVIDIA also has their own GameStream solution that allows you to stream games from a PC with powerful NVIDIA graphics hardware. However, you’ll need an NVIDIA Shield handheld gaming console to do this. At the moment, NVIDIA’s game streaming solution can only stream to the NVIDIA Shield. However, the NVIDIA Shield device can be connected to your TV so you can play that streaming game on your TV. Valve’s Steam Machines are supposed to bring PC gaming to the living room and they’ll do it using HDMI cables, a custom Steam controller, the Big Picture interface, and in-home streaming for compatibility with Windows games. You can do all of this yourself today — you’ll just need an Xbox 360 controller instead of the not-yet-released Steam controller. Image Credit: Marco Arment on Flickr, William Hook on Flickr, Lewis Dowling on Flickr

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  • Webinar: Meeting Customer Expectations in the New Age of Retail

    - by Sanjeev Sharma
    Webcast Date: Thursday, November 8, 2012 Time: 10am PT/ 1pm ET The retail market has expanded into the online, mobile, and social worlds. But the key to success hasn’t changed since the days of traditional, brick-and-mortar business. It’s still about service. A successful retailer today in omni-channel customer engagement must be able to deliver quality service that meets customer expectations. For many retailers, Oracle Web commerce applications help them achieve that success, allowing them to market, interact, and transact across multiple channels in a predictable, consistent, and personalized manner. Join us for this Webcast, and learn what Oracle applications can do for your business. In this session, we will discuss: The significance and dimensions of modern omni-channel customer experience The Oracle Commerce platform Real-world examples of business value derived by running customer-facing applications on Oracle Engineered Systems Register today Speakers: Sanjeev Sharma Principal Product Director, Oracle Exalogic, Oracle Kelly Goetsch Senior Principal Product Manager, Oracle Commerce, Oracle Dan Conway Senior Product Manager, Oracle Retail, Oracle

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  • Database Management System do exist?

    - by Bakaburg
    I want to build a database for my no-profit association, and i was planning to do it by myself. But then i realize that really i don't have the time to buid a solid, secure system. So i was thinking, maybe like cms do exist, maybe there are also database management systems. I mean a layer of abstraction over the database that allow you manage data, manage access to data, create widgets with and expand the data. Maybe with a frontend to use this data and a backend to manage it. that is a cms but not based on pages and post but on data! Moreover, i would like some standard solution, because my IT management position ends this year, so i need something that will be easy to use and expand even by someone that is not a developer. So do exist something that fit my need? PS: i would really like some modern and visually pleasant solution, javascritp and ajax heavy and that relies the fewest is possible on server and reloading of the pages.

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  • Tackling Security and Compliance Barriers with a Platform Approach to IDM: Featuring SuperValu

    - by Darin Pendergraft
    On October 25, 2012 ISACA and Oracle sponsored a webcast discussing how SUPERVALU has embraced the platform approach to IDM.  Scott Bonnell, Sr. Director of Product Management at Oracle, and Phil Black, Security Director for IAM at SUPERVALU discussed how a platform strategy could be used to formulate an upgrade plan for a large SUN IDM installation. See the webcast replay here: ISACA Webcast Replay (Requires Internet Explorer or Chrome) Some of the main points discussed in the webcast include: Getting support for an upgrade project by aligning with corporate initiatives How to leverage an existing IDM investment while planning for future growth How SUN and Oracle IDM architectures can be used in a coexistance strategy Advantages of a rationalized, modern, IDM Platform architecture ISACA Webcast Featuring SuperValu - Tackling Security and Compliance Barriers with a Platform Approach to Identity Management from OracleIDM  

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  • On my way home ...

    - by Mike Dietrich
    Modern technology is nice - sitting in the speed train from Holyhead to London Euston - working a bit. This means: I'm heading home. Still 16 hours to go - but up to now everything seems to work fine. Irish Ferries did a great job. Even though they might never have seen some many passengers entering the Ulysses (what a good name for a ship to start the journey with) everybody was so friendly and helpful. The night at Holyhead station ... ahm ... But the train left right in time. German airspace is still closed until at least 8pm tonight. And Irish airspace seems to be closed as well today. So it might be the best decision to take the longer journey. At least now I have the chance to see some countryside (a bit flat out there - but very green) ;-)

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  • BREAKING NEWS: Bunny Inc. becomes a Social Enterprise

    - by kellsey.ruppel(at)oracle.com
    Bunny what? Is your business adaptive, agile, innovative, productive… profitable? No? Wondering how to make it so?Social Enterprise is gaining ground as a global trend to accelerate business performance by better engaging employees, partners and customers.Starting with this post we are looking forward to stimulate an open conversation on the benefits, the stumbling blocks and the best practices of the Enterprise 2.0 journey… but with a bunny smile!Is Social Enterprise revolutionary or evolutionary? How does it impact traditional systems (such as ERP, CRM, BPM, Portals)? How do you measure it? How do you avoid major mistakes?We want to share our vision and to hear from you. Tell us what you did, what you are going to do and what you would never do with social and ... start looking for the invasion of the #e20bunnies at #webcenterJoin the discussion on LinkedIn! And follow the conversation on Twitter!Technorati Tags: UXP, collaboration, enterprise 2.0, modern user experience, oracle, portals, webcenter, e20bunnies

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  • Is it ok to replace optimized code with readable code?

    - by Coder
    Sometimes you run into a situation where you have to extend/improve an existing code. You see that the old code is very lean, but it's also difficult to extend, and takes time to read. Is it a good idea to replace it with modern code? Some time ago I liked the lean approach, but now, it seems to me that it's better to sacrifice a lot of optimizations in favor of higher abstractions, better interfaces and more readable, extendable code. The compilers seem to be getting better as well, so things like struct abc = {} are silently turned into memsets, shared_ptrs are pretty much producing the same code as raw pointer twiddling, templates are working super good because they produce super lean code, and so on. But still, sometimes you see stack based arrays and old C functions with some obscure logic, and usually they are not on the critical path. Is it good idea to change such code if you have to touch a small piece of it either way?

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  • What's Your Supply Chain+Manufacturing Strategy for Success

    - by [email protected]
    Forward thinking enterprises look to eliminate their dependence on legacy applications that manage information in batch - replacing them with real-time integrated/modern information managment. With rapid manufacturing and global supply chains much more complex today, with the pace of chance ever increasing, leading organizations need better ways to orchestrate their supply chain synchronization with their partner and customer base. EM magazine Mar/Apr'10 edition, covers this topic in an article "Strategising for Success" pgs 26-27, and discusses the available options to organizations as they drive improvements in the levels of collaboration with their partners, suppliers, shippers, distributors and ultimately their end-users, the customer! I'll past the link to the article here as soon as i validate/confirm it.

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  • Is there such a thing as too much experience?

    - by sunpech
    For modern software developers in today's world, is there such a thing as having too much experience with a certain technology or programming language? To a recruiter, interviewer, or company hiring-- could there often be cases where a particular candidate has so much experience in a certain area or technology where it works against the candidate to being hired? I'm not talking about cases where a senior developer is applying for an entry-level developer position, and has a lot of experience in that sense. Nor am I talking about cases where a candidate is outright lying (e.g. 20+ years experience with Ruby on Rails). I've overheard this in conversations between hiring managers/developers during happy hours, yet I'm not quite sure I fully understand what they mean.

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  • C library build system dependencies

    - by Ninefingers
    Hello all, This debate has cropped up on a mailing list for a project I'm involved in. Unfortunately we're quite a small bunch at the moment, so I want to ask a wider audience. We're writing a C library (for arbitrary precision arithmetic) and are investigating build systems. Currently we have a bash script in desperate need of work. I believe we can't use autotools etc due to licensing (bsd vs gpl). So I suggested we use a modern scripting language like python or perl. The question is: is having something like perl or python around at build time an unrealistic dependency on Unix-like platforms these days?

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  • Should I use title case in URLs?

    - by Amadiere
    We are currently deciding on a consistent naming convention across a site with multiple web applications. Historically, I've been an advocate of the 'lowercase all the letters!' when creating URLs: http://example.com/mysystem/account/view/1551 However, within the last year or two, specifically since I began using ASP.NET MVC & had more dealings with REST based URLs, I've become a fan of capitalizing the first letter of each section/word within the URL as it makes it easier to read (imho). http://example.com/MySystem/Account/View/1551 We're not in a situation where people need to read or be able to understand the URLs, so that's not a driver per se. The main thing we are after is a consistent approach that is rational and makes sense. Are there any standards that declare it good to do one way or another, or issues that we may run into on (at least realistically modern) setups that would choose a preference over another? What is the general consensus for this debate currently?

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  • Java - learning / migrating fast

    - by Yippie-Kai-Yay
    Hello! This is not one of those questions like "How do I learn Java extremely fast, I know nothing about programming, but I heard Java is cool, yo". I have an interview for a Java Software Developer in a couple of weeks and the thing is that I think that I know C++ really good and I am somewhat good at C# (like, here I can probably answer on a lot of questions related to these languages), but I have almost zero experience with Java. I have a lot of projects written in both languages, I participiated in several open-source projects (mostly C++, though). Now, what should I do (in your opinion) to prepare myself for this Java interview. I guess migrating from C# to Java should be kind of fast, especially when you know a lot about programming in global, patterns, modern techniques and have a lot of practical experience behind you. But still two weeks is obviously not enough to get Java in-depth - so what should I focus on to have the best chances to pass the interview? Thank you.

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  • Learn About HTML5 and the Future of the Web

    Learn About HTML5 and the Future of the Web San Francisco Java, PHP, and HTML5 user groups hosted an event on May 11th, 2010 on HTML5 with three amazing speakers: Brad Neuberg from Google, Giorgio Sardo from Microsoft, and Peter Lubbers from Kaazing. In this first of the three videos, Brad Neuberg from Google (formerly an HTML5 advocate and currently a Software Engineer on the Google Buzz team) explains why HTML5 matters - to consumers as well as developers! His overview of HTML5 included SVG/Canvas rendering, CSS transforms, app-cache, local databases, web workers, and much more. He also identified the scope and practical implications of the changes that are coming along with HTML5 support in modern browsers. This event was organized by Marakana, Michael Tougeron from Gamespot, and Bruno Terkaly from Microsoft. Microsoft was the host and Marakana, Gamespot, Medallia, TEKsystems, and Guidewire Software sponsored the event. marakana.com From: GoogleDevelopers Views: 177 6 ratings Time: 50:44 More in Science & Technology

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  • Vintage Fan Home Movie Captures the Filming of Return of the Jedi

    - by Jason Fitzpatrick
    Back in 1982, Jeff Broz and a group of his friends heard the next Star Wars film was being shot out in the California desert so they did what any fan would do; they trekked out into the desert and crashed the set. In this 7 minute home video we’re treated to views of the set, actors at work, and other behind-the-scenes footage of the production of Return of the Jedi. It’s hard to imagine, given modern security practices and secrecy surrounding movies, that a bunch of kids could just walk onto a set and start filming these days. [via Neatorama] HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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  • Should integer divide by zero halt execution?

    - by Pyrolistical
    I know that modern languages handle integer divide by zero as an error just like the hardware does, but what if we could design a whole new language? Ignoring existing hardware, what should a programming language does when an integer divide by zero occurs? Should it return a NaN of type integer? Or should it mirror IEEE 754 float and return +/- Infinity? Or is the existing design choice correct, and an error should be thrown? Is there a language that handles integer divide by zero nicely? EDIT When I said ignore existing hardware, I mean don't assume integer is represented as 32 bits, it can be represented in anyway you can to imagine.

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  • Learning to optimize with Assembly

    - by niktehpui
    I am a second year student of Computer Games Technology. I recently finished my first prototype of my "kind" of own pathfinder (that doesn't use A* instead a geometrical approach/pattern recognition, the pathfinder just needs the knowledge about the terrain that is in his view to make decisions, because I wanted an AI that could actually explore, if the terrain is already known, then it will walk the shortest way easily, because the pathfinder has a memory of nodes). Anyway my question is more general: How do I start optimizing algorithms/loops/for_each/etc. using Assembly, although general tips are welcome. I am specifically looking for good books, because it is really hard to find good books on this topic. There are some small articles out there like this one, but still isn't enough knowledge to optimize an algorithm/game... I hope there is a modern good book out there, that I just couldn't find...

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  • How to Play Classic Arcade Games On Your PC

    - by Jason Fitzpatrick
    New games with their fancy textures, 3D modeling, and immersive environments have their charm, sure, but what if you crave some old-school arcade gaming? Read on to see how you can turn your computer into an virtual arcade cabinet. Vintage games ran on hardware significantly less powerful than that found in modern desktop computers. With the right software, a joystick or two (if you want to make experience feel more authentic), and a little digging online to find your favorite games, it’s easy to play the arcade hits of your childhood. How to Play Classic Arcade Games On Your PC How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8

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  • Creating and Using a jQuery Plug-in in ASP.NET Web Forms

    - by bipinjoshi
    Developers often resort to code reuse techniques in their projects. As far as ASP.NET framework server side programming is concerned classes, class libraries, components, custom server controls and user controls are popular code reuse techniques. Modern ASP.NET web applications no longer restrict themselves only to server side programming. They also make use of client side scripting to render rich web forms. No wonder that Microsoft Visual Studio 2010 includes jQuery library by default as a part of newly created web site. If you are using jQuery for client side scripting then one way to reuse your client side code is to create a jQuery plug-in. Creating a plug-in allows you to bundle your reusable jQuery code in a neat way and then reuse it across web forms. In this article you will learn how to create a simple jQuery plug-in from scratch. You will also learn about certain guidelines that help you build professional jQuery plug-ins.http://www.bipinjoshi.net/articles/aae84a03-b4a8-477d-b087-5b7f42935220.aspx 

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  • Get Real Multitasking on Android With These 8 Floating Apps

    - by Chris Hoffman
    Android has decent multitasking, but the missing piece of the puzzle is the ability to have multiple apps on-screen at the same time – particularly useful on a larger tablet. Floating apps fill this need. Floating apps function as always-on-top windows, allowing you to watch videos, browse the web, take notes, or do other things while using another app. They demonstrate how Android’s interface is more flexible than iOS and the Modern UI in Windows. Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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