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  • SQL SERVER – Integrate Your Data with Skyvia – Cloud ETL Solution

    - by Pinal Dave
    In our days data integration often becomes a key aspect of business success. For business analysts it’s very important to get integrated data from various sources, such as relational databases, cloud CRMs, etc. to make correct and successful decisions. There are various data integration solutions on market, and today I will tell about one of them – Skyvia. Skyvia is a cloud data integration service, which allows integrating data in cloud CRMs and different relational databases. It is a completely online solution and does not require anything except for a browser. Skyvia provides powerful etl tools for data import, export, replication, and synchronization for SQL Server and other databases and cloud CRMs. You can use Skyvia data import tools to load data from various sources to SQL Server (and SQL Azure). Skyvia supports such cloud CRMs as Salesforce and Microsoft Dynamics CRM and such databases as MySQL and PostgreSQL. You even can migrate data from SQL Server to SQL Server, or from SQL Server to other databases and cloud CRMs. Additionally Skyvia supports import of CSV files, either uploaded manually or stored on cloud file storage services, such as Dropbox, Box, Google Drive, or FTP servers. When data import is not enough, Skyvia offers bidirectional data synchronization. With this tool, you can synchronize SQL Server data with other databases and cloud CRMs. After performing the first synchronization, Skyvia tracks data changes in the synchronized data storages. In SQL Server databases (and other relational databases) it creates additional tracking tables and triggers. This allows synchronizing only the changed data. Skyvia also maps records by their primary key values to each other, so it does not require different sources to have the same primary key structure. It still can match the corresponding records without having to add any additional columns or changing data structure. The only requirement for synchronization is that primary keys must be autogenerated. With Skyvia it’s not necessary for data to have the same structure in integrated data storages. Skyvia supports powerful mapping mechanisms that allow synchronizing data with completely different structure. It provides support for complex mathematical and string expressions when mapping data, using lookups, etc. You may use data splitting – loading data from a single CSV file or source table to multiple related target tables. Or you may load data from several source CSV files or tables to several related target tables. In each case Skyvia preserves data relations. It builds corresponding relations between the target data automatically. When you often work with cloud CRM data, native CRM data reporting and analysis tools may be not enough for you. And there is a vast set of professional data analysis and reporting tools available for SQL Server. With Skyvia you can quickly copy your cloud CRM data to an SQL Server database and apply corresponding SQL Server tools to the data. In such case you can use Skyvia data replication tools. It allows you to quickly copy cloud CRM data to SQL Server or other databases without customizing any mapping. You need just to specify columns to copy data from. Target database tables will be created automatically. Skyvia offers powerful filtering settings to replicate only the records you need. Skyvia also provides capability to export data from SQL Server (including SQL Azure) and other databases and cloud CRMs to CSV files. These files can be either downloadable manually or loaded to cloud file storages or FTP server. You can use export, for example, to backup SQL Azure data to Dropbox. Any data integration operation can be scheduled for automatic execution. Thus, you can automate your SQL Azure data backup or data synchronization – just configure it once, then schedule it, and benefit from automatic data integration with Skyvia. Currently registration and using Skyvia is completely free, so you can try it yourself and find out whether its data migration and integration tools suits for you. Visit this link to register on Skyvia: https://app.skyvia.com/register Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL Tagged: Cloud Computing

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  • PASS Summit 2012: keynote and Mobile BI announcements #sqlpass

    - by Marco Russo (SQLBI)
    Today at PASS Summit 2012 there have been several announcements during the keynote. Moreover, other news have not been highlighted in the keynote but are equally if not more important for the BI community. Let’s start from the big news in the keynote (other details on SQL Server Blog): Hekaton: this is the codename for in-memory OLTP technology that will appear (I suppose) in the next release of the SQL Server relational engine. The improvement in performance and scalability is impressive and it enables new scenarios. I’m curious to see whether it can be used also to improve ETL performance and how it differs from using SSD technology. Updates on Columnstore: In the next major release of SQL Server the columnstore indexes will be updatable and it will be possible to create a clustered index with Columnstore index. This is really a great news for near real-time reporting needs! Polybase: in 2013 it will debut SQL Server 2012 Parallel Data Warehouse (PDW), which will include the Polybase technology. By using Polybase a single T-SQL query will run queries across relational data and Hadoop data. A single query language for both. Sounds really interesting for using BigData in a more integrated way with existing relational databases. And, of course, to load a data warehouse using BigData, which is the ultimate goal that we all BI Pro have, right? SQL Server 2012 SP1: the Service Pack 1 for SQL Server 2012 is available now and it enable the use of PowerPivot for SharePoint and Power View on a SharePoint 2013 installation with Excel 2013. Power View works with Multidimensional cube: the long-awaited feature of being able to use PowerPivot with Multidimensional cubes has been shown by Amir Netz in an amazing demonstration during the keynote. The interesting thing is that the data model behind was based on a many-to-many relationship (something that is not fully supported by Power View with Tabular models). Another interesting aspect is that it is Analysis Services 2012 that supports DAX queries run on a Multidimensional model, enabling the use of any future tool generating DAX queries on top of a Multidimensional model. There are still no info about availability by now, but this is *not* included in SQL Server 2012 SP1. So what about Mobile BI? Well, even if not announced during the keynote, there is a dedicated session on this topic and there are very important news in this area: iOS, Android and Microsoft mobile platforms: the commitment is to get data exploration and visualization capabilities working within June 2013. This should impact at least Power View and SharePoint/Excel Services. This is the type of UI experience we are all waiting for, in order to satisfy the requests coming from users and customers. The important news here is that native applications will be available for both iOS and Windows 8 so it seems that Android will be supported initially only through the web. Unfortunately we haven’t seen any demo, so it’s not clear what will be the offline navigation experience (and whether there will be one). But at least we know that Microsoft is working on native applications in this area. I’m not too surprised that HTML5 is not the magic bullet for all the platforms. The next PASS Business Analytics conference in 2013 seems a good place to see this in action, even if I hope we don’t have to wait other six months before seeing some demo of native BI applications on mobile platforms! Viewing Reporting Services reports on iPad is supported starting with SQL Server 2012 SP1, which has been released today. This is another good reason to install SP1 on SQL Server 2012. If you are at PASS Summit 2012, come and join me, Alberto Ferrari and Chris Webb at our book signing event tomorrow, Thursday 8 2012, at the bookstore between 12:00pm and 12:30pm, or follow one of our sessions!

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  • What is the difference between cubes and the Unified Dimensional Model (if any)?

    - by ngm
    I'm currently researching SQL Server 2008 as a business intelligence solution, and currently looking at Analysis Services (and I'm pretty new to business intelligence as a whole...) I'm a bit confused by some of the terms in SSAS, particularly the conceptual differences between cubes and MS's Unified Dimensional Model. I believe that a cube in SSAS is basically an OLAP cube -- dimensions, measures, something that sits between the underlying data source and a business user. But then that's kind of what I understand UDM to be as well. The docs for SQL Server 2005 seem to suggest as much: "A cube is essentially synonymous with a Unified Dimensional Model (UDM)". But then the SQL Server 2008 pages sort of suggest that UDM is a wrapper for both multidimensional data (cubes) and relational data: "Use the Unified Dimensional Model to provide one consolidated business view for relational and multidimensional data that includes business entities, business logic, calculations, and metrics." This blog post suggests similarly: "UDM provides a single dimensional model for all OLAP analysis and relational reporting needs. So you can use either MDX or SQL" Is UDM something that sits above cubes? Or are they the same thing? I presume I would develop cubes with the Cube Designer application; what would I develop a UDM with?

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  • .NET Ascertaining mouse is on line drawn between two arbitrary points

    - by johnc
    I have an arrow drawn between two objects on a Winform. What would be the simplest way to determine that my mouse is currently hovering over, or near, this line. I have considered testing whether the mouse point intersects a square defined and extrapolated by the two points, however this would only be feasible if the two points had very similar x or y values. I am thinking, also, this problem is probably more in the realms of linear algebra rather than simple trigonometry, and whilst I do remember the simpler aspects of matrices, this problem is beyond my knowledge of linear algebra. On the other hand, if a .NET library can cope with the function, even better.

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  • CodePlex Daily Summary for Wednesday, March 21, 2012

    CodePlex Daily Summary for Wednesday, March 21, 2012Popular ReleasesMetodología General Ajustada - MGA: 02.02.01: Cambios John: Se actualizan los seis formularios de Identificaciòn para que despuès de guardar actualice las grillas, de tal manera que no se dupliquen los registros al guardar. Se genera instalador con los cambios y se actualiza la base datos con ùltimos cambios en el SP de Flujo de Caja.xyzzy+: xyzzy+ 0.2.2.235+0: SHA1: 4a0258736e7df52bb6e2304178b7fcf02414ae17 PrerequisitesMicrosoft Visual C++ 2010 SP1 Redistributable Package (x86) (ja) FeaturesUnicode Visual Style Known ProblemsCharacter encodings other than Shift_JIS and UTF-X may be broken. Functions related to character encodings may not work. (ex. iso-code-char)Phalanger - The PHP Language Compiler for the .NET Framework: 3.0 (March 2012) for .NET 4.0: March release of Phalanger 3.0 significantly enhances performance, adds new features and fixes many issues. See following for the list of main improvements: New features: Phalanger Tools installable for Visual Studio 2011 Beta "filter" extension with several most used filters implemented DomDocument HTML parser, loadHTML() method mail() PHP compatible function PHP 5.4 T_CALLABLE token PHP 5.4 "callable" type hint PCRE: UTF32 characters in range support configuration supports <c...Nearforums - ASP.NET MVC forum engine: Nearforums v8.0: Version 8.0 of Nearforums, the ASP.NET MVC Forum Engine, containing new features: Internationalization Custom authentication provider Access control list for forums and threads Webdeploy package checksum: abc62990189cf0d488ef915d4a55e4b14169bc01 Visit Roadmap for more details.BIDS Helper: BIDS Helper 1.6: This beta release is the first to support SQL Server 2012 (in addition to SQL Server 2005, 2008, and 2008 R2). Since it is marked as a beta release, we are looking for bug reports in the next few months as you use BIDS Helper on real projects. In addition to getting all existing BIDS Helper functionality working appropriately in SQL Server 2012 (SSDT), the following features are new... Analysis Services Tabular Smart Diff Tabular Actions Editor Tabular HideMemberIf Tabular Pre-Build ...SQL Monitor - managing sql server performance: SQLMon 4.2 alpha 12: 1. improved process visualizer, now shows how many dead locks, and what are the locked objects 2. fixed some other problems.Json.NET: Json.NET 4.5 Release 1: New feature - Windows 8 Metro build New feature - JsonTextReader automatically reads ISO strings as dates New feature - Added DateFormatHandling to control whether dates are written in the MS format or ISO format, with ISO as the default New feature - Added DateTimeZoneHandling to control reading and writing DateTime time zone details New feature - Added async serialize/deserialize methods to JsonConvert New feature - Added Path to JsonReader/JsonWriter/ErrorContext and exceptions w...SCCM Client Actions Tool: SCCM Client Actions Tool v1.11: SCCM Client Actions Tool v1.11 is the latest version. It comes with following changes since last version: Fixed a bug when ping and cmd.exe kept running in endless loop after action progress was finished. Fixed update checking from Codeplex RSS feed. The tool is downloadable as a ZIP file that contains four files: ClientActionsTool.hta – The tool itself. Cmdkey.exe – command line tool for managing cached credentials. This is needed for alternate credentials feature when running the HTA...WebSocket4Net: WebSocket4Net 0.5: Changes in this release fixed the wss's default port bug improved JsonWebSocket supported set client access policy protocol for silverlight fixed a handshake issue in Silverlight fixed a bug that "Host" field in handshake hadn't contained port if the port is not default supported passing in Origin parameter for handshaking supported reacting pings from server side fixed a bug in data sending fixed the bug sending a closing handshake with no message which would cause an excepti...SuperWebSocket, a .NET WebSocket Server: SuperWebSocket 0.5: Changes included in this release: supported closing handshake queue checking improved JSON subprotocol supported sending ping from server to client fixed a bug about sending a closing handshake with no message refactored the code to improve protocol compatibility fixed a bug about sub protocol configuration loading in Mono improved BasicSubProtocol added JsonWebSocketSessionDaun Management Studio: Daun Management Studio 0.1 (Alpha Version): These are these the alpha application packages for Daun Management Studio to manage MongoDB Server. Please visit our official website http://www.daun-project.comSurvey™ - web survey & form engine: Survey™ 2.0: The new stable Survey™ Project 2.0.0.1 version contains many new features like: Technical changes: - Use of Jquery, ASTreeview, Tabs, Tooltips and new menuprovider Features & Bugfixes: Survey list and search function Folder structure for surveys New Menustructure Library list New Library fields User list and search functions Layout options for a survey with CSS, page header and footer New IP filter security feature Enhanced Token Management New Question fields as ID, Alias...SmartNet: V1.0.0.0: DY SmartNet ?????? V1.0Project Vanquish: 0.0.3: Implemented SSAO and also added a new Hemispheric light.Relational data Transfer Application: Data Transfer Application: Relational data Transfer Application helps to move data scenarios from One relational database to other Relational database without moving entire tables.Media.Net: 0.1: This is the first version.FolderDrive: FolderDrive release 0.01 (alpha): FolderDrive v. 0.01 [alpha] This is the first alpha release of FolderDrive utility. Known problems: - displays popup message at every startup (needs to be shown only at first start) Plans for next release: - more options - startup behavior fixes - adding permanent drive bindings that don't require the app to be constantly run - ClickOnce deployment (?)Javascript .NET: Javascript .NET v0.6: Upgraded to the latest stable branch of v8 (/tags/3.9.18), and switched to using their scons build system. We no longer include v8 source code as part of this project's source code. Simultaneous multithreaded use of v8 now supported (v8 Isolates), although different contexts may not share objects or call each other. 64-bit .Net 4.0 DLL now included. (Download now includes x86 and x64 for both .Net 3.5 and .Net 4.0.)MyRouter (Virtual WiFi Router): MyRouter 1.0.6: This release should be more stable there were a few bug fixes including the x64 issue as well as an error popping up when MyRouter started this was caused by a NULL valueFinestra Virtual Desktops: 2.5.4501: This is a very minor update release. Please see the information about the 2.5 and 2.5.4500 releases for more information on recent changes. This update did not even have an automatic update triggered for it. Adds error checking and reporting to all threads, not only those with message loopsNew Projects320 TWIN System: twin systemArtificial Intelligence Optimization: Optimization of artificial intelligenceAuthor-it DITA Importer: Author-it plug-in that imports DITA XML content into a library.Drag Animated Panel: DragAnimatedPanel is a WPF (Window Presentation Fundation) panel that lets you drag and rearrange elements of animation. It's developed in C#.Empires: Create an empire - in space!EpLibrary: EpLibrary makes it easier for Visual C++ developers to develop an application. You will no longer have to create the basic functionality over and over again. It's developed in Visual C++ 2008.estructuradedatos2012: Our final project, we need hosting; an action game with wiiremote enabled.ExcelTestRunner: With Excel Test Runner, numerical models (eg quantative libraries) in Excel can be used to directly feed your .NET unit tests with input data and test outcomes. Developed in C# and does not use automation.Fast Binary Serialization: fastbinaryserializer is based on local class methods serializing properties unboxed to streams. Besides that is can serialize objects partial.Iveely Search Engine: ?????????。???C#??。IveelyOS (Iveely Operating System): ?????????。JoySys: MVC project .eCommercekinectlearningbswu09: Bachelor project about a motion controlled learning game with Kinect.LabTech: Program stworzony jako laboratorium do testów sprzetu, wirtualnych rozwiazan, symulowania sieci i problemów zlozonych. Sluzy równiez do testowania obciazenia serwerów, sieci i aplikacji. Zawiera: symulator sieci, tester aplikacji, wirtualny serwer i serwery baz danych.LINQPad examples: LINQPad code examplesProjet LIF7: Projet LIF7 RPG Printemps 2012ReCaptcha Validator Plugin for Kooboo CMS for adding content or sending feedback: ReCaptcha Validator Plugin for Kooboo CMS for adding content or sending feedback e-mailSecurity Foundation -- WCF based SSO: This project was started as a WCF based SSO solution that serves ASP.NET websites (through membership providers ) and other winform / web services. Then we realized that we need to bring in claim-based funcitionalities and make it work as our own identity foundation. SharePoint 2010 InfoPath Forms Hub: The SharePoint 2010 InfoPath Forms Hub enables SharePoint users to consume all browserenabled InfoPath forms that are deployed across the entire SharePoint farm from one single Webpart.trident_library: ???????????????User Accounts Manager: Aplikacija, ki omogoca operacije z uporabniki v doloceni domeni na google apps. Za komunikacijo s strežniki uporablja Google Apps API.USI Reporting: Project USI ReportingWAYWO Enterprise Conversation System: Enterprise Conversation SystemxgcBase: my helper????????? ??????? ???: ?????? ????????? (http://d.hatena.ne.jp/gsf_zero1 ) ???????????????????。 ** ????????????????????????????。???????々??????????。 **

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  • More Fun With Math

    - by PointsToShare
    More Fun with Math   The runaway student – three different ways of solving one problem Here is a problem I read in a Russian site: A student is running away. He is moving at 1 mph. Pursuing him are a lion, a tiger and his math teacher. The lion is 40 miles behind and moving at 6 mph. The tiger is 28 miles behind and moving at 4 mph. His math teacher is 30 miles behind and moving at 5 mph. Who will catch him first? Analysis Obviously we have a set of three problems. They are all basically the same, but the details are different. The problems are of the same class. Here is a little excursion into computer science. One of the things we strive to do is to create solutions for classes of problems rather than individual problems. In your daily routine, you call it re-usability. Not all classes of problems have such solutions. If a class has a general (re-usable) solution, it is called computable. Otherwise it is unsolvable. Within unsolvable classes, we may still solve individual (some but not all) problems, albeit with different approaches to each. Luckily the vast majority of our daily problems are computable, and the 3 problems of our runaway student belong to a computable class. So, let’s solve for the catch-up time by the math teacher, after all she is the most frightening. She might even make the poor runaway solve this very problem – perish the thought! Method 1 – numerical analysis. At 30 miles and 5 mph, it’ll take her 6 hours to come to where the student was to begin with. But by then the student has advanced by 6 miles. 6 miles require 6/5 hours, but by then the student advanced by another 6/5 of a mile as well. And so on and so forth. So what are we to do? One way is to write code and iterate it until we have solved it. But this is an infinite process so we’ll end up with an infinite loop. So what to do? We’ll use the principles of numerical analysis. Any calculator – your computer included – has a limited number of digits. A double floating point number is good for about 14 digits. Nothing can be computed at a greater accuracy than that. This means that we will not iterate ad infinidum, but rather to the point where 2 consecutive iterations yield the same result. When we do financial computations, we don’t even have to go that far. We stop at the 10th of a penny.  It behooves us here to stop at a 10th of a second (100 milliseconds) and this will how we will avoid an infinite loop. Interestingly this alludes to the Zeno paradoxes of motion – in particular “Achilles and the Tortoise”. Zeno says exactly the same. To catch the tortoise, Achilles must always first come to where the tortoise was, but the tortoise keeps moving – hence Achilles will never catch the tortoise and our math teacher (or lion, or tiger) will never catch the student, or the policeman the thief. Here is my resolution to the paradox. The distance and time in each step are smaller and smaller, so the student will be caught. The only thing that is infinite is the iterative solution. The race is a convergent geometric process so the steps are diminishing, but each step in the solution takes the same amount of effort and time so with an infinite number of steps, we’ll spend an eternity solving it.  This BTW is an original thought that I have never seen before. But I digress. Let’s simply write the code to solve the problem. To make sure that it runs everywhere, I’ll do it in JavaScript. function LongCatchUpTime(D, PV, FV) // D is Distance; PV is Pursuers Velocity; FV is Fugitive’ Velocity {     var t = 0;     var T = 0;     var d = parseFloat(D);     var pv = parseFloat (PV);     var fv = parseFloat (FV);     t = d / pv;     while (t > 0.000001) //a 10th of a second is 1/36,000 of an hour, I used 1/100,000     {         T = T + t;         d = t * fv;         t = d / pv;     }     return T;     } By and large, the higher the Pursuer’s velocity relative to the fugitive, the faster the calculation. Solving this with the 10th of a second limit yields: 7.499999232000001 Method 2 – Geometric Series. Each step in the iteration above is smaller than the next. As you saw, we stopped iterating when the last step was small enough, small enough not to really matter.  When we have a sequence of numbers in which the ratio of each number to its predecessor is fixed we call the sequence geometric. When we are looking at the sum of sequence, we call the sequence of sums series.  Now let’s look at our student and teacher. The teacher runs 5 times faster than the student, so with each iteration the distance between them shrinks to a fifth of what it was before. This is a fixed ratio so we deal with a geometric series.  We normally designate this ratio as q and when q is less than 1 (0 < q < 1) the sum of  + … +  is  – 1) / (q – 1). When q is less than 1, it is easier to use ) / (1 - q). Now, the steps are 6 hours then 6/5 hours then 6/5*5 and so on, so q = 1/5. And the whole series is multiplied by 6. Also because q is less than 1 , 1/  diminishes to 0. So the sum is just  / (1 - q). or 1/ (1 – 1/5) = 1 / (4/5) = 5/4. This times 6 yields 7.5 hours. We can now continue with some algebra and take it back to a simpler formula. This is arduous and I am not going to do it here. Instead let’s do some simpler algebra. Method 3 – Simple Algebra. If the time to capture the fugitive is T and the fugitive travels at 1 mph, then by the time the pursuer catches him he travelled additional T miles. Time is distance divided by speed, so…. (D + T)/V = T  thus D + T = VT  and D = VT – T = (V – 1)T  and T = D/(V – 1) This “strangely” coincides with the solution we just got from the geometric sequence. This is simpler ad faster. Here is the corresponding code. function ShortCatchUpTime(D, PV, FV) {     var d = parseFloat(D);     var pv = parseFloat (PV);     var fv = parseFloat (FV);     return d / (pv - fv); } The code above, for both the iterative solution and the algebraic solution are actually for a larger class of problems.  In our original problem the student’s velocity (speed) is 1 mph. In the code it may be anything as long as it is less than the pursuer’s velocity. As long as PV > FV, the pursuer will catch up. Here is the really general formula: T = D / (PV – FV) Finally, let’s run the program for each of the pursuers.  It could not be worse. I know he’d rather be eaten alive than suffering through yet another math lesson. See the code run? Select  “Catch Up Time” in www.mgsltns.com/games.htm The host is running on Unix, so the link is case sensitive. That’s All Folks

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  • Should certain math classes be required for a Computer Science degree?

    - by sunpech
    For a Computer Science degree at many colleges and universities, certain math courses are required: Calculus, Linear Algebra, and Discrete Mathematics are few examples. However, since I've started working in the real world as a software developer, I have yet to truly use the knowledge I had at once acquired from taking those classes. My question is: Should these math classes be required to obtain a computer science degree? Or would they better served as electives? A Slashdot post: CS Profs Debate Role of Math In CS Education

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  • New SQL Azure Development Accelerator Core promotional offer announced

    - by Eric Nelson
    This is (almost) a straight copy and paste but represents an important announcement worthy of a little more “exposure” :-) Starting August 1, 2010, we will release a new SQL Azure Development Accelerator Core promotional offer.  This new offer will give you the flexibility to purchase commitment quantities of SQL Azure Business Edition databases independent of other Windows Azure platform services at a deeply discounted monthly price.  The offer is valid only for a six month term.  You may purchase in 10 GB increments the amount of our Business Edition relational database that you require (each Business Edition database is capable of storing up to 50 GB).  The offer price will be $74.95 per 10 GB per month.  This promotional offer represents 25% off of our normal consumption rates.  Monthly Business Edition relational database usage exceeding the purchased commitment amount and usage for other Windows Azure platform services for this offer will be charged at our normal consumption rates.  Please click here for full details of our new SQL Azure Development Accelerator Core offer.  Related Links: Details of 5GB and 50GB databases have been released http://ukazure.ning.com UK community site Getting started with the Windows Azure Platform

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  • library for octree or kdtree

    - by Will
    Are there any robust performant libraries for indexing objects? It would need frustum culling and visiting objects hit by a ray as well as neighbourhood searches. I can find lots of articles showing the math for the component parts, often as algebra rather than simple C, but nothing that puts it all together (apart from perhaps Ogre, which has rather more involved and isn't so stand-alone). Surely hobby game makers don't all have to make their own octrees? (Python or C/C++ w/bindings preferred)

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  • JavaOne 2012: Lessons from Mathematics

    - by darcy
    I was pleased to get notification recently that my bof proposal for Lessons from Mathematics was accepted for JavaOne 2012. This is a bit of a departure from the project-centric JavaOne talks I usually give, but whisps of this kind of material have appeared before. I'm looking forward to presenting material from linear algebra, stochastics, and numerical optimization that have influence my thinking about technical problems in the JDK and elsewhere.

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  • What algorithms can I use for bullet movement toward the enemy?

    - by theateist
    I develop 2D strategy game(probably for Android). There are weapons that shooting on enemies. From what I've read in this, this, this and this post I think that I need Linear algebra, but I don't really understand what algorithm I should use so the bullet will go to the target? Do I nee pathfinder, why? Can you please suggest what algorithms and/or books I can use for bullet movement toward the enemy?

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  • What library for octrees or kd-trees?

    - by Will
    Are there any robust performant libraries for indexing objects? It would need frustum culling and visiting objects hit by a ray as well as neighbourhood searches. I can find lots of articles showing the math for the component parts, often as algebra rather than simple C, but nothing that puts it all together (apart from perhaps Ogre, which has rather more involved and isn't so stand-alone). Surely hobby game makers don't all have to make their own octrees? (Python or C/C++ w/bindings preferred)

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  • Oracle as a Service in the Cloud

    - by Jason Williamson
    This should really be a Tweet, but I guess I'm writing a bit more. In theme of data migration and legacy modernization, I am seeing more and more of a push to consolidate data sources, especially from non-oracle to oracle in an effort to save dollars. From a modernization perspective, this fits in quite well. We are able to migrate things like Terradata, Sybase and DB2 and put that all into an Oracle database and then provide that as a OaaS (Oracle as a Service) Cloud offering. This seems to be a growing trend, and not unlike the cool RDS Amazon Database cloud being built on Oracle as well. We again find ourselves back in the similar theme of migration, however. The target technology sounds like a winner (COBOL to Java/SOA...DB2/Datacom/Adabas to Oracle) but the age-old problem of how to get there still persists. It it not trivial to migrate large amounts of pre-relational or "devolved" relational data. To do this, we again must revert back to a tight roadmap to migration and leverage the growing tools and services that we have. I'm working on a couple of new sections and chapters for a book that Tom and Prakash and I are writing around Database Migration and Consolidation. I'll share some snipits shortly.

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  • Use a SQL Database for a Desktop Game

    - by sharethis
    Developing a Game Engine I am planning a computer game and its engine. There will be a 3 dimensional world with first person view and it will be single player for now. The programming language is C++ and it uses OpenGL. Data Centered Design Decision My design decision is to use a data centered architecture where there is a global event manager and a global data manager. There are many components like physics, input, sound, renderer, ai, ... Each component can trigger and listen to events. Moreover, each component can read, edit, create and remove data. The question is about the data manager. Whether to Use a Relational Database Should I use a SQL Database, e.g. SQLite or MySQL, to store the game data? This contains virtually all game content like items, characters, inventories, ... Except of meshes and textures which are even more performance related, so I will keep them in memory. Is a SQL database fast enough to use it for realtime reading and writing game informations, like the position of a moving character? I also need to care about cross-platform compatibility. Aside from keeping everything in memory, what alternatives do I have? Advantages Would Be The advantages of using a relational database like MySQL would be the data orientated structure which allows fast computation. I would not need objects for representing entities. I could easily query data of objects near the player needed for rendering. And I don't have to take care about data of objects far away. Moreover there would be no need for savegames since the hole game state is saved in the database. Last but not least, expanding the game to an online game would be relative easy because there already is a place where the hole game state is stored.

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  • CodePlex Daily Summary for Saturday, March 17, 2012

    CodePlex Daily Summary for Saturday, March 17, 2012Popular ReleasesAutoSPEditor: AutoSPEditor Installer: Installs the current version of the AutoSPEditor using ClickOnce. Your application will be updated automatically.Javascript .NET: Javascript .NET v0.6: Upgraded to the latest stable branch of v8 (/tags/3.9.18), and switched to using their scons build system. We no longer include v8 source code as part of this project's source code. Simultaneous multithreaded use of v8 now supported (v8 Isolates), although different contexts may not share objects or call each other. 64-bit .Net 4.0 DLL now included. (Download now includes x86 and x64 for both .Net 3.5 and .Net 4.0.)MyRouter (Virtual WiFi Router): MyRouter 1.0.6: This release should be more stable there were a few bug fixes including the x64 issue as well as an error popping up when MyRouter started this was caused by a NULL valuePulse: Pulse Beta 4: This version is still in development but should include: Logging and error handling have been greatly improved. If you run into an error or Pulse crashes make sure to check the Log folder for a recently modified log file so you can report the details of the issue A bunch of new features for the Wallbase.cc provider. Cleaner separation between inputs, downloading and output. Input and downloading are fairly clean now but outputs are still mixed up in the mix which I'm trying to resolve ...Google Books Downloader for Windows: Google Books Downloader-2.0.0.0.: Google Books DownloaderFinestra Virtual Desktops: 2.5.4501: This is a very minor update release. Please see the information about the 2.5 and 2.5.4500 releases for more information on recent changes. This update did not even have an automatic update triggered for it. Adds error checking and reporting to all threads, not only those with message loopsAcDown????? - Anime&Comic Downloader: AcDown????? v3.9.2: ?? ●AcDown??????????、??、??????,????1M,????,????,?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。??????AcPlay?????,??????、????????????????。 ● AcDown???????????????????????????,???,???????????????????。 ● AcDown???????C#??,????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7/8 ????????????? ??:????????Windows XP???,?????????.NET Framework 2.0???(x86),?????"?????????"??? ??????????????,??????????: ??"AcDo...ArcGIS Editor for OpenStreetMap: ArcGIS Editor for OSM 2.0 Release Candidate: Your feedback is welcome - and this is your last chance to get your fixes in for this version! Includes installer for both Feature Server extension and Desktop extension, enhanced functionality for the Desktop tools, and enhanced built-in Javascript Editor for the Feature Server component. This release candidate includes fixes to beta 4 that accommodate domain users for setting up the Server Component, and fixes for reporting/uploading references tracked in the revision table. See Code In-P...C.B.R. : Comic Book Reader: CBR 0.6: 20 Issue trackers are closed and a lot of bugs too Localize view is now MVVM and delete is working. Added the unused flag (take care that it goes to true only when displaying screen elements) Backstage - new input/output format choice control for the conversion Backstage - Add display, behaviour and register file type options in the extended options dialog Explorer list view has been transformed to a custom control. New group header, colunms order and size are saved Single insta...Windows Azure Toolkit for Windows 8: Windows Azure Toolkit for Windows 8 Consumer Prv: Windows Azure Toolkit for Windows 8 Consumer Preview - Preview Release v1.2.1Minor updates to setup experience: Check for WebPI before install Dependency Check updated to support the following VS 11 and VS 2010 SKUs Ultimate, Premium, Professional and Express Certs Windows Azure Toolkit for Windows 8 Consumer Preview - Preview Release v1.2.0 Please download this for Windows Azure Toolkit for Windows 8 functionality on Windows 8 Consumer Preview. The core features of the toolkit include:...Facebook Graph Toolkit: Facebook Graph Toolkit 3.0: ships with JSON Toolkit v3.0, offering parse speed up to 10 times of last version supports Facebook's new auth dialog supports new extend access token endpoint new example Page Tab app filter Graph Api connections using dates fixed bugs in Page Tab appsCODE Framework: 4.0.20312.0: This version includes significant improvements in the WPF system (and the WPF MVVM/MVC system). This includes new styles for Metro controls and layouts. Improved color handling. It also includes an improved theme/style swapping engine down to active (open) views. There also are various other enhancements and small fixes throughout the entire framework.ScintillaNET: ScintillaNET 2.4: 3/12/2012 Jacob Slusser Added support for annotations. Issues Fixed with this Release Issue # Title 25012 25012 25018 25018 25023 25023 25014 25014 Visual Studio ALM Quick Reference Guidance: v3 - For Visual Studio 11: RELEASE README Welcome to the BETA release of the Quick Reference Guide preview As this is a BETA release and the quality bar for the final Release has not been achieved, we value your candid feedback and recommend that you do not use or deploy these BETA artifacts in a production environment. Quality-Bar Details Documentation has been reviewed by Visual Studio ALM Rangers Documentation has not been through an independent technical review Documentation ...AvalonDock: AvalonDock 2.0.0345: Welcome to early alpha release of AvalonDock 2.0 I've completely rewritten AvalonDock in order to take full advantage of the MVVM pattern. New version also boost a lot of new features: 1) Deep separation between model and layout. 2) Full WPF binding support thanks to unified logical tree between main docking manager, auto-hide windows and floating windows. 3) Support for Aero semi-maximized windows feature. 4) Support for multiple panes in the same floating windows. For a short list of new f...Windows Azure PowerShell Cmdlets: Windows Azure PowerShell Cmdlets 2.2.2: Changes Added Start Menu Item for Easy Startup Added Link to Getting Started Document Added Ability to Persist Subscription Data to Disk Fixed Get-Deployment to not throw on empty slot Simplified numerous default values for cmdlets Breaking Changes: -SubscriptionName is now mandatory in Set-Subscription. -DefaultStorageAccountName and -DefaultStorageAccountKey parameters were removed from Set-Subscription. Instead, when adding multiple accounts to a subscription, each one needs to be added ...IronPython: 2.7.2.1: On behalf of the IronPython team, I'm happy to announce the final release IronPython 2.7.2. This release includes everything from IronPython 54498 and 62475 as well. Like all IronPython 2.7-series releases, .NET 4 is required to install it. Installing this release will replace any existing IronPython 2.7-series installation. Unlike previous releases, the assemblies for all supported platforms are included in the installer as well as the zip package, in the "Platforms" directory. IronPython 2...Kooboo CMS: Kooboo CMS 3.2.0.0: Breaking changes: When upgrade from previous versions, MUST reset the all the content type templates, otherwise the content manager might get a compile error. New features Integrate with Windows azure. See: http://wiki.kooboo.com/?wiki=Kooboo CMS on Azure Complete solution to deploy on load balance servers. See: http://wiki.kooboo.com/?wiki=Kooboo CMS load balance Update Jquery and Jquery ui to the lastest version(Jquery 1.71, Jquery UI 1.8.16). Tree style text content editing. See:h...Extensions for Reactive Extensions (Rxx): Rxx 1.3: Please read the latest release notes for details about what's new. Related Work Items Content SummaryRxx provides the following features. See the Documentation for details. Many IObservable<T> extension methods and IEnumerable<T> extension methods. Many wrappers that convert asynchronous Framework Class Library APIs into observables. Many useful types such as ListSubject<T>, DictionarySubject<T>, CommandSubject, ViewModel, ObservableDynamicObject, Either<TLeft, TRight>, Maybe<T>, Scala...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.47: Properly output escaped characters in CSS identifiers throw an EOF error when parsing a CSS selector that doesn't end in a declaration block chased down a stack-overflow issue with really large JS sources. Needed to flatten out the AST tree for adjacent expression statements that the application merges into a single expression statement, or that already contain large, comma-separated expressions in the original source. fix issue #17569: tie together the -debug switch with the DEBUG defi...New ProjectsCOBOL Bubble Sort: The famous Bubble Sort algorithm using COBOLCross Site Media Dashboard (webpart) for SharePoint video content: View video content in easy to configure dashboard structure. Supports a vast range of video formatsDataObjects.Net Samples: DataObjects.Net SamplesDev Tracking Tool: Dev Tracking Tool is thought to help software developers keeping track of their activities in a fast way, and use these informations for later update of tasks in other informatic systems (i.e.: tracking tasks in TFS and/or other tracking tools).Governance Checklist - Create/manage your Governance Checklist: Governance Checklist - Create/manage your Governance Checklist. SharePoint Governance Checklist generated as a starting point however you can update to your own criteria. Visual Guages to show the status of your governance progresslibspotify.NET - a managed interop library for libspotify: libspotify.NET is a simple interop wrapper library for libspotify written in C#. It enables .NET developers to write applications that can browse, search, and stream digital music from the Spotify platform. This project is compatible with libspotify API version 10.1.16. Requires libspotify.dll, a Spotify premium account, and an application API key. More info on the libspotify API at http://developer.spotify.com/en/libspotify/overview/ Media.Net: All-In-One Media Player for Windows XP, Vista, Windows 7 and Windows 8.MisTutoriales: MisTutoriales Ejemplos de programación.mobile video: mobile videoMugen MVVM Toolkit: Mugen MVVM Toolkit makes it easier to develop Silverlight, WPF and WP7 applications using the Model-View-ViewModel design pattern. It is very easy to use. It combines the pattern of DI (dependency injection) and MVVM (Model-View-ViewModel).Project SIMPLE Orca: SIMPLE makes it easier for non-programmers to create simple applications. You'll no longer have to learn an entire language in order to create that simple application you've been stressing over. S imple And I deal M acroed P rogramming L anguage For E aseRelational data Transfer Application: Relational data Transfer Application helps to move data scenarios from One relational database to other Relational database without moving entire tables. Basically this applciation moves a given data row along with its relational data to destination database. rGUI: rGUI is an open source .NET front-end for Robocopy written in C#. It is designed for users already familiar with the Robocopy command-line switches and what they do, but who want the command parameters presented in a visual way.S#: Spontaneous Sharp: A mix of very easy to use c# libraries, born out of spontaneous needs to simplify a large number of programming tasks in .NET C#.SDF - Smart Document Framework: Smart Document Framework offers an alternative to the FlowDocument which provides a simpler rendering engine and allows for better pagination.Shatong: Shatong SystemSPD 2007 Custom Activity Pause Until CheckOut = None: This activity can be added to the beginning of a SharePoint Designer 2007 workflow to pause the workflow until the item is no longer checked out (soft or hard checkout)Spontaneous XNA Library (SXL): Yet another XNA Library that has arisen from various spontaneous needs. Hopefully it can be as helpful to others as it has been to me.TeaFiles.Net - time series storage: TeaFiles.Net is an API for TeaFiles that makes it easy to store and exchange time series data between .Net programs and C++, Python, R and other applications. Written in C#. Find more details about the file specification, other APIs and tools at discretelogics.comTypePipe: TypePipe allows you to modify existing CLR types using a simple, expression-based API. Modifications from several tools and libraries (AOP, IoC etc.) can be combined. Types are generated via Reflection.Emit or user-defined back-ends.UCB_12_1: This is a research projectUCB_12_2: UCB_12_2UCB_12_3: UCB_12_3UCB_12_4: UCB_12_4UCB_12_Common: UCB_12_CommonVG Task Manager: task manager demo project created by Vivek Gupta.WP7 Map Control: Lightweight universal map control for Windows Phone 7xRM#: xRM# is focused on boosting productivity while developing JavaScript customizations for Microsoft Dynamics CRM 2011. xRM# provided a platform to scribble code in C# and translating them to JavaScript snippet for xRM customizations. Developers can benefit from structural and coherent flow of using existing C# coding guidelines. Pseudo data types, IntelliSense and Code Documentation reduce code look-ups and increase productivity. xRM# also supports deploying generated scripts as minified ver...

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  • In SQL Server Business Intelligence, why would I create a report model from an OLAP cube?

    - by ngm
    In Business Intelligence Developer Studio, I'm wondering why one would want to create a report model from an OLAP cube. As far as I understand it, OLAP cubes and report models are both business-oriented views of underlying structures (usually relational databases) that may not mean much to a business user. The cube is a multidimensional view in terms of dimensions and measures, and the report model is... well I'm not sure entirely -- is it a more business-oriented, but still essentially relational view? Anyway, in Report Builder I can connect directly to both an OLAP cube or a report model. So I don't see why, if I have an OLAP cube which already provides a business-oriented view of the data suitable for end-users, why I would then convert that to a report model and use that in Report Builder instead. I think I'm obviously missing some fundamental difference between report models and cubes -- any help appreciated!

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  • Foreign keys in MySQL?

    - by icco
    I have been slowly learning SQL the last few weeks. I've picked up all of the relational algebra and the basics of how relational databases work. What I'm trying to do now is learn how it's implemented. A stumbling block I've come across in this, is foreign keys in MySQL. I can't seem to find much about the other than that they exist in the InnoDB storage schema that MySQL has. What is a simple example of foreign keys implemented in MySQL? Here's part of a schema I wrote that doesn't seem to be working if you would rather point out my flaw than show me a working example. CREATE TABLE `posts` ( `pID` bigint(20) NOT NULL auto_increment, `content` text NOT NULL, `time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `uID` bigint(20) NOT NULL, `wikiptr` bigint(20) default NULL, `cID` bigint(20) NOT NULL, PRIMARY KEY (`pID`), Foreign Key(`cID`) references categories, Foreign Key(`uID`) references users ) ENGINE=InnoDB;

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  • ORM on iPhone. More simple than CoreData.

    - by Alexander Babaev
    The question is rather simple. I know that there is SQLite. There is Core Data also. But I need something in between. More object-oriented than SQLite API and simplier than Core Data. Main points are: I need access to stored entities only by id. No queries required. I need to store items of a single type, it means that I can use only one table if I choose SQLite. I want automatic object-relational conversion. Or object-storage if the storage is not relational. I can use object archiving, but I have to implement things (NSArchiver). But I want to write some kind of class and get persistence automatically. As it can be done with Hibernate/ActiveRecord/Core Data/etc. Thanks.

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  • What are alternatives to standard ORM in a data access layer?

    - by swampsjohn
    We're all familiar with basic ORM with relational databases: an object corresponds to a row and an attribute in that object to a column (or some slight variation), though many ORMs add a lot of bells and whistles. I'm wondering what other alternatives there are (besides raw access to the database or whatever you're working with). Alternatives that just work with relational databases would be great, but ones that could encapsulate multiple types of backends besides just SQL (such as flat files, RSS, NoSQL, etc.) would be even better. I'm more interested in ideas rather than specific implantations and what languages/platforms they work with, but please link to anything you think is interesting.

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  • How to create a voldemort store?

    - by Pankaj
    I am trying to understand the Voldemort java API. I am new to non relational databases, so as I understand, Voldemort's store can be compared to a table in relational model. I saw the following code in the documentation. String bootstrapUrl = "tcp://localhost:6666"; StoreClientFactory factory = new SocketStoreClientFactory(new ClientConfig().setBootstrapUrls(bootstrapUrl)); // create a client that executes operations on a single store StoreClient client = factory.getStoreClient("test"); Here, we got a Store client based on the an existing store (test). How can I actually create a store for Voldemort through java?

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  • Looking for a good course/book/resource on modern databases

    - by spanky
    This is slightly embarrassing. I'm a professional developer working at one of the big tech companies and I've never used a database. I've got an idea for a website I want to build as a learning experience and possibly as a business, but I don't have the faintest idea what database to use, let alone how to fix/debug the database when I run into problems. I'm looking for a course, a website, a book, etc., that will give me an overview of modern database technology (SQL vs. NOSQL vs. relational vs. non-relational (I only have a vague idea what these even mean)). I'm starting by googling/wikipediaing all of these terms, but if there are better, comprehensive resources available that I should be aware of, I'd love to hear about them.

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  • Request/Response objects

    - by Dan
    I'm planning on using CXF's rest implementation. I'm thinking of simply annotating my entity classes with jaxb annotations, such as @XmlRootElement, in order to create response objects. The benefit being avoidance of code duplication. As for the (client) request object, which will be used by a separate web app, I'm thinking of 'copying' the entity classes, removing the orm annotations, and adding jaxb annotations. Based on the above: Are there any dangers of creating request/response objects from entity classes? My entity classes contain relational properties, if I were to annotate them with @XmlRootElement, how can I stop the relational properties from being added (or considered apart of) to the response object? Is there a better/easier way to create request objects rather than copying the entity classes, removing/adding annotations?

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  • How to draw an Arc in OpenGL

    - by rpgFANATIC
    While making a little Pong game in C++ OpenGL, I decided it'd be fun to create arcs (semi-circles) when stuff bounces. I decided to skip Bezier curves for the moment and just go with straight algebra, but I didn't get far. My algebra follows a simple quadratic function (y = +- sqrt(mx+c)). This little excerpt is just an example I've yet to fully parameterize, I just wanted to see how it would look. When I draw this, however, it gives me a straight vertical line where the line's tangent line approaches -1.0 / 1.0. Is this a limitation of the GL_LINE_STRIP style or is there an easier way to draw semi-circles / arcs? Or did I just completely miss something obvious? void Ball::drawBounce() { float piecesToDraw = 100.0f; float arcWidth = 10.0f; float arcAngle = 4.0f; glBegin(GL_LINE_STRIP); for (float i = 0.0f; i < piecesToDraw; i += 1.0f) // Positive Half { float currentX = (i / piecesToDraw) * arcWidth; glVertex2f(currentX, sqrtf((-currentX * arcAngle)+ arcWidth)); } for (float j = piecesToDraw; j > 0.0f; j -= 1.0f) // Negative half (go backwards in X direction now) { float currentX = (j / piecesToDraw) * arcWidth; glVertex2f(currentX, -sqrtf((-currentX * arcAngle) + arcWidth)); } glEnd(); } Thanks in advance.

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