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  • How to plan/manage multi-platform (mobile) products?

    - by PhD
    Say I've to develop an app that runs on iOS, Android and Windows 8 Mobile. Now all three platforms are technically in different program languages. The only 'reuse' that I can see is that of the boxes-and-lines drawings (UML :) charts and nothing else. So how do companies/programmers manage the variation of the same product across different platforms especially since the implementation languages differ? It's 'easier' in the desktop world IMO given the plethora of languages and cross-platform libraries to make your life easier. Not so in the mobile world. More so, product line management principles don't seem to be all that applicable - what is same and variant doesn't really matter - the application is the same (conceptually) and the implementation is variant. Some difficulties that come to mind: Bug Fixing: Applications maybe designed in a similar manner but the bug identification and fixing would be radically different. A bug on iOS may/may-not be existent for that on Android. Or a bug fix approach on one platform may not be the same on another (unless it's a semantic bug like a!=b instead of a==b which would require the same 'approach' to fixing in essence Enhancements: Making a change on one platform would be radically different than on another Code-Design Divergence: They way the code is written/organized, the class structures etc., could be very different given the different implementation environments - leading to further reuse of the (above) UML models. There are of course many others - just keeping the development in sync and making sure all applications are up to the same version with the same set of features etc. Seems the effort is 3x that of a single application. So how exactly does one manage this nightmarish situation? Some thoughts: Split application to client/server to minimize the effect to client side only (not always doable) Use frameworks like Unity-3D that could take care of the cross-platform problem (mostly applicable to games and probably not to other applications etc.) Any other ways of managing a platform line? What are some proven approaches to managing/taming the effects?

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  • GNOME Usability Hackfest

    Google recently sponsored the GNOME Usability Hackfest , which took place in London. With over 30 GNOME design and usability experts attending on some days, it was an...

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  • Hierachies....from the Top Down

    - by Joe G
    I've been struggling with how to write on the topic of the importance of hierarchy design.  It's not so much that hierarchies haven't always been important, it's more of that with Fusion, the timing of when the hierarchies are designed should take a higher priority.    I will attempt to explain..... When I was implementing applications, back in the day, we had the list of detailed account values to enter with the obvious parent accounts. Then, after the setup was complete and things were functioning, the reporting phase started.  Users explained the elements that they want on the reports, what totals should be included, and how things should be compared.  Frequently, there was at least one calculation that became a nightmare either because it was based on very specific things that didn't relate to anything else or because it was "hardcoded" so that when something changed, someone need to "fix" the report. With Fusion, the process changes slightly.  You still want to enter all of the detailed accounts, but before you start adding parent values, you should investigate the reporting requirements from the top-down.  It's better to build hierarchies based on the reporting requirements than it is to build reports based on random hierarchies. Build reports based on hierarchies that resemble the reports themselves, and maintain the hierarchies without rework of the reports. For example, if you look at an income statement, you may have line items for Material Costs, Employee Costs, Travel & Entertainment, and Total Operating Expenses.  In your hierarchy, you have detail values that roll up to Material Costs, Employee Costs, and Travel & Entertainment which roll up to Total Operating Expenses. Balances are stored automatically in the cube for each of these.  When you define the report, you pick each of these members - no calculations required.  If a new detail value is added, you simply add it to the hierarchy, and there is no need to modify the report. I realize that there are always exceptions that require special handling, but I am confident that you will end up with much fewer exceptions if you make reporting a priority and design your hierarchies from the top-down.

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  • Input prediction and server re-simultaion

    - by Lope
    I have read plenty of articles about multiplayer principles and I have basic client-server system set up. There is however one thing I am not clear on. When player enters input, it is sent to the server and steps back in time to check if what should have happened at the time of that input and it resimulates the world again. So far everything's clear. All articles took shooting as an example, because it is easy to explain and it is pretty straightforward, but I believe movement is more complicated. Imagine following situation: 2 players move towards each other. A------<------B Player A stops halfway towards the collision point, but there is lag spike so the command does not arrive on the server for a second or so. Current state of the world on the server (and on the other clients as well) at the time when input arrives is this: [1]: -------AB------- The command arrives and we go back in time and re-simulate the world, the result is this: [2]: ---AB----------- Player A sees situation [2] which is correct, but the player is suddenly teleported from the position in [1] (center) to the position in [2]. Is this how this is supposed to work? Point of the client prediction is to give lagged player feeling that everything is smooth, not to ruin experience for other players. Alternative is to discard timestamp on the player's input and handle it when it arrives on the server without going back in time. This, however, creates even more severe problems for lagged player (even if he is lagging just a bit)

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  • Methods Of Preventing Spams In Blogs

    One of the most widely used form of spamdexing method in today';s market is comment spam. This method involves the use of random and irrelevant comments, commonly promoting a commercial service in blo... [Author: Margarette Mcbride - Web Design and Development - June 08, 2010]

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  • DotNetNuke Website Developers in India

    DotNetNuke is a novel technology here in India and developers providing services through this technology are available in reasonable numbers. The technology has been brought into effect over a period... [Author: John Anthony - Web Design and Development - May 18, 2010]

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  • Yet Another SQL Strategy for Versioned Data

    There is a popular design for a database that requires a built-in audit-trail of amendments and additions, where data is never deleted, but merely superseded by a later version. Whilst this is conceptually simple, it has always made for complicated SQL for reporting the latest version of data. Alex joins the debate on the best way of doing this with an example using an indexed view and the filtered index.

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  • SEO, The Techniques And Tools

    SEO or search engine optimization is one of the most widely used types of Internet marketing across the industry. It is a technique similar in approach with SEM or search engine marketing (in which b... [Author: Margarette Mcbride - Web Design and Development - May 30, 2010]

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  • What's the simplest way to create a page with dynamic elements?

    - by ElendilTheTall
    I'm developing a site, part of which lists training courses with dates and prices. Every year the dates and prices change, which would mean loads of manual code editing to update the pages. What I'd like to do is have a database containing the relevant information, which the course pages then reference, so we can just update the database rather than the HTML. My experience lies in static design - so, what is a simple way to achieve this?

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  • Vattenfall Accelerates Projects and Cuts Costs with AutoVue Document Visualization

    Ringhals, a Swedish nuclear power plant, part of the Vattenfall Group, produces 20 percent of the country's electricity and is the largest power station in the Nordic region. Ringhals has standardized on AutoVue for most of their engineering and asset document visualization requirements throughout their plant maintenance, design and engineering operations. As a result, they have cut IT maintenance costs, increased productivity, and improved maintenance operations.

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  • Enable Seamless Transformation and Effective Adoption of Change with Oracle User Productivity Kit

    Organizations go through continuous transformation and change - whether it is through mergers and acquisitions, standardizations of systems, a rollout of a new application or business process improvements. With Oracle User Productivity Kit, project teams can capture and deploy best practices to streamline efficiency, reduce cost, and ensure successful change adoption. Discover how organizations can leverage the multiple outputs of Oracle UPK for all phases of the project from blueprinting/design/configuration to testing/training/go-live as well as maintenance and support.

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  • Empirical evidence regarding testability

    - by Xodarap
    A google scholar search turns up numerous papers on testability, including models for computing testability, recommendations for how ones code can be more testable, etc. They all come with the assertion that more testable code is more stable, but I can't find any studies which actually demonstrate this. Can someone link me to a study evaluating the effect of testable code vs. quality? The closest I can find is Improving the Testability of Object Oriented Systems, which discusses the relationship between design flaws and testability.

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  • Windows 7: Use VirtualStore technology as user for own benefit?

    - by mfn
    I've researched a bit and came to the understanding that VirtualStore is part of the new UAC feature in Vista/W7 which is the file system part of the transparent data redirection and redirects write access to folders like program files to C:\User\<username>\AppData\Local\VirtualStore\ in lack of applications respecting the LUA principles. Now I'm interested if that kind of transparent redirection can also be used as a power to the user. Here's an example which comes to my mind: I install any kind of software to e.g. D:\Whatever\ThisAndThisApp\ and I set up things that, after initial installation, any write access to this folder is transparently redirected to e.g. D:\MyOwnVirtualStore\Whatever\ThisAndThisApp\file_only_writable_here.txt. Is this thinking too far or can I actually use that power of VirtualStore as a user on Windows 7? I'm using the Professional version of that matters.

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  • Fixed window size app development for Mac OS X

    - by Phil
    I am developing a rather eye-candy application which is to be released on Mac App Store. Due to its graphics intensive use, it would save a great deal of time on UI end if the app could be released with a fixed size main frame-dialog. I did try doing a search regarding App Store policies on the matter but could not find anything. Is the distribution of fixed-size frame [productivity] apps are allowed within the App Store if they conform with other design guidelines?

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  • Download NDepend Analysis Tool

    - by Editor
    NDepend is a tool that simplifies managing a complex .NET code base. Architects and developers can analyze code structure, specify design rules, plan massive refactoring, do effective code reviews and master evolution by comparing different versions of the code. The result is better communication, improved quality, easier maintenance and faster development. NDepend supports the Code Query Language [...]

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  • Why Dedicated Servers Make Good Business Sense

    When your company begins the process of creating a website, there are several things you have to keep in mind. One of the first questions is what kind of web hosting service does your business requir... [Author: Shane Watson - Web Design and Development - April 20, 2010]

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  • Quality Aspects of a Web Development Company

    In most cases people have tend to think that both web design and web development is a very easy and simple task and that it does not require much to do. But the truth of the matter is actually that it is not an easy task for it really requires the knowledge of web designing and developing which is highly possessed by the web designers. However, there are a number of things that should be put in place before any web development company come up with a very vital website for any individual or company.

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  • Movement prediction for non-shooters

    - by ShadowChaser
    I'm working on an isometric (2D) game with moderate-scale multiplayer - 20-30 players. I've had some difficulty getting a good movement prediction implementation in place. Right now, clients are authoritative for their own position. The server performs validation and broad-scale cheat detection, and I fully realize that the system will never be fully robust against cheating. However, the performance and implementation tradeoffs work well for me right now. Given that I'm dealing with sprite graphics, the game has 8 defined directions rather than free movement. Whenever the player changes their direction or speed (walk, run, stop), a "true" 3D velocity is set on the entity and a packet it sent to the server with the new movement state. In addition, every 250ms additional packets are transmitted with the player's current position for state updates on the server as well as for client prediction. After the server validates the packet, it gets automatically distributed to all of the other "nearby" players. Client-side, all entities with non-zero velocity (ie/ moving entities) are tracked and updated by a rudimentary "physics" system - basically nothing more than changing the position by the velocity according to the elapsed time slice (40ms or so). What I'm struggling with is how to implement clean movement prediction. I have the nagging suspicion that I've made a design mistake somewhere. I've been over the Unreal, Half-life, and all other movement prediction/lag compensation articles I could find, but they all seam geared toward shooters: "Don't send each control change, send updates every 120ms, server is authoritative, client predicts, etc". Unfortunately, that style of design won't work well for me - there's no 3D environment so each individual state change is important. 1) Most of the samples I saw tightly couple movement prediction right into the entities themselves. For example, storing the previous state along with the current state. I'd like to avoid that and keep entities with their "current state" only. Is there a better way to handle this? 2) What should happen when the player stops? I can't interpolate to the correct position, since they might need to walk backwards or another strange direction if their position is too far ahead. 3) What should happen when entities collide? If the current player collides with something, the answer is simple - just stop the player from moving. But what happens if two entities take up the same space on the server? What if the local prediction causes a remote entity to collide with the player or another entity - do I stop them as well? If the prediction had the misfortune of sticking them in front of a wall that the player has gone around, the prediction will never be able to compensate and once the error gets to high the entity will snap to the new position.

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  • Gamagora présente 3 nouveaux jeux pour les 5 ans de l'école, plus de 300 visiteurs ont assisté au Gamagora Game Show

    Gamagora présente 3 nouveaux jeux pour les 5 ans de l'école Une explosion de pixels durant le Gamagora Game Show Au sein de l'université lumière Lyon 2 se trouve une section spécialisée dans la création de jeux vidéo, appelée Gamagora. Cette section regroupe des étudiants en programmation, infographie et game design. Au cours du cursus, les élèves doivent créer une démonstration de jeu en trois mois. Les élèves sont ainsi confrontés aux différentes problématiques que l'on peut rencontrer durant le processus de la création, allant des problèmes d'organisati...

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  • Optimizing Blog Entries for Search Engine Traffic

    Search engine traffic is important for anybody doing business online. This type of traffic is not only free but is also very highly targeted. One of the easiest ways to optimize your site for traffic... [Author: TJ Philpott - Web Design and Development - April 30, 2010]

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