Slashdot Mirror
Domain: ibm.com
Stories and comments across the archive that link to ibm.com.
Stories · 981
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How to use Subversion with Eclipse
An anonymous reader writes "From the beginning, Eclipse included tight integration with the Concurrent Versions System (CVS) in order to provide access to change-management capabilities. Now, many projects -- notably those run by the Apache Software Foundation -- are using a different change-management system: Subversion. This article demonstrates how to add Subversion support to Eclipse and how to perform basic version-control activities from the IDE." -
Independent Data and Formatting with Microformats
IdaAshley writes to tell us IBM DeveloperWorks is running an article about how to best utilize microformats to embed data within standard XHTML code. From the article: "Microformats are a pragmatic approach to solving the issue of structured data on the Web. Is it as architecturally pure as XML-encoded data separated from its formatting through a mechanism such as XSLT style sheets? No. But I think this approach is a realistic middle step that will help build a more intelligent Web that is easier to use and provides better search and data integration." -
Going beyond JSP with Ruby and Seaside
An anonymous reader writes "The Java community has used JavaServer Pages (JSP) technology through most of the last decade, but signs of rust are starting to show. Longstanding conventions inhibit Java programmers from using Java code within Web pages now. Other languages handle Web development much better than Java. This article discuss how code generation works in Ruby, and it delve into a more radical component-based approach in Seaside." -
Java Static Analysis And Custom Bug Detectors
An anonymous reader writes "Java static analysis and custom bug detectors can be a very cost-effective way to improve software quality. By creating a detector for a known bug pattern, we can search for that bug pattern not only in the current code base for a specific project, but in any project, current or future. This article looks at how static analysis tools can change the way you manage software quality." -
Dick Tracy's New Linux Box?
An anonymous reader writes "The Zypad is a new arm-wearable computer right out of Futurama. It can run Windows CE or Linux and has a 400 MHz CPU, 64MB Flash memory, 3.5 inch screen. The Zypad leaves the user's hands free — it has no keyboard, just a touchscreen and navigation keys. Voice recognition is 'being developed.' It turns on only when you look at it, so it saves power. It has GPS and Bluetooth/WLAN/GSM connectivity. Price: 1000 Euro." Too bad it's not yet available for sale — that screen looks more useful than the one on IBM's Linux watch from 2000. -
Is the Google Web Toolkit Right For You?
An anonymous reader writes "The recently released Google Web Toolkit (GWT) is a comprehensive set of APIs and tools that lets you create dynamic Web applications almost entirely in Java code. However, GWT is something of an all-or-nothing approach, targeted at a relatively small niche in Web application development market. This article shows you what GWT can do and will help you decide if it's the best tool to use for your web development." -
Ruby on Rails for DB2 Developers
An anonymous reader writes "Ruby on Rails seems to be the new hotness in the world of web development, right up there with Ajax. IBM DeveloperWorks has a helpful howto on how to bring the worlds of Ruby on Rails and your DB2 framework together. From the article: 'Because Rails emerged from the open source world, until recently you had to use MySQL or PostgreSQL to work with it. Now that IBM has released a DB2 adapter for Rails, it's possible to write efficient Web applications on top of your existing DB2 database investment.'" -
What Makes a Valid Benchmark?
An anonymous reader writes "Benchmarks can make a big difference if they are accurate in predicting performance. That's simple enough to describe; it's not nearly so simple to implement. Benchmarks can be an excellent tool for predicting performance and estimating requirements, but they also can be misleading, possibly catastrophically so. This article looks at benchmarks; the good, the bad and the ugly." -
Software to Make Blue Gene Top 200 Teraflops
An anonymous reader writes "New Scientist has a story about the most intensive computer program ever created. It runs on IBM's big beast, Blue Gene/L, at Lawrence Livermore National Laboratory in California and carries out 207.3 teraflops (trillion cacluations per second). The program, called Qbox, performs very complex quantum calculations to simulate the behaviour of thousands of atoms in three dimensions. Wow." -
Ajax Back, Forward, Reload and PHP
IdaAshley writes "A major challenge of Asynchronous JavaScript and XML (Ajax)-driven Web sites is the lack of a Back button. Mike Brittain discusses ways to get around this obstacle in part 1 of the 'Developing PHP the Ajax way' series." From the article: "The Web is a page-by-page medium. The backward and forward buttons on your browser's toolbar direct the browser from page to page. When Macromedia's Flash became all of the rage, developers and users started to see how Rich Internet Applications (RIAs) break this metaphor. You might click around a few sites, land on a Flash-based Web site, then click around in it for a few minutes. One click of the Back button and the ride is over. Rather than going one step backward within the Flash site, you completely lose your place." -
High Definition Radio and New Content Alternatives
An anonymous reader writes "Many people are aware that satellite radio is a viable consumer option thanks to massive marketing campaigns. What many people do not know is that an alternative, High Definition Radio, exists in most major US markets. IBM DeveloperWorks explains how HD Radio works and why the masses may soon be scrambling to adopt this technology and expand it to alternative content as fast as possible." -
What's the Secret Sauce in Ruby on Rails?
An anonymous reader writes "Ruby on Rails seems to be a lightning rod for controversy. At the heart of most of the controversy lies amazing productivity claims. Rails isn't a better hammer; it's a different kind of tool. This article explores the compromises and design decisions that went into making Rails so productive within its niche." -
An Ajax Reality Worth Worrying About
An anonymous reader writes "This article discusses the hype that currently surrounds Ajax and it's shortcomings. Reliable Ajax frameworks are still under construction, and you should worry about navigation history, bookmarkability, feedback, persistence, concurrency, and security. This article will help you avoid the major problems inherent in Ajax development." -
Web 2.0 Recipes With PHP + DHTML
An anonymous reader writes "Take a look at these full simple code examples for dynamic elements for your web apps, including: Ad boxes, Pop-ups, Spinners, and Tabs. Easy ways to show and hide content on the page." From the article: "Incorporating JavaScript into your page makes the page dynamic and creates a more compelling user experience. Users can get more data more quickly, look at information from different aspects, and seamlessly navigate the site -- and the site doesn't have to go back to the server for lots of pages. However, there's also a reason to avoid using JavaScript: browser compatibility. In the early days of flat HTML, Internet Explorer rendered pages differently from Netscape. Those problems were fixed, but when support for CSS was added, new compatibility issues arose. Now most of the CSS issues have been solved, but JavaScript compatibility issues have cropped up. These compatibility problems have no easy solution. You need to weigh the benefit of what the JavaScript is doing against the number of browsers you'll need to test against and support." -
PS3 Cell Processor Security Architecture
hoyhoy writes "IBM Developerworks is discussing the PS3 Cell Processor Security Architecture today on Developerworks. It details the hardware level security for isolating processes that exists in the Cell processor's architecture." From the article: "The architecture's main strength is its ability to allow an application to protect itself using the hardware security features instead of the conventional method of solely relying on the operating system or other supervisory software for protection. Therefore, if the operating system is compromised by an attack, the hardware security features can still protect the application and its valuable data. As an analogy, consider the protection the supervisory software provides as the castle's moat and the Cell BE security hardware features as the locked safe inside the castle." -
Ajax and the Ken Burns Effect
An anonymous reader writes "IBM DeveloperWorks has an interesting project posted that shows how to design a client-side slide show using the 'Ken Burns Effect.' From the article: 'If the Web 2.0 revolution has one buzzword, it's Asynchronous JavaScript and XML (Ajax). [...] Here, you discover how to build XML data sources for Ajax, request XML data from the client, and then dynamically create and animate HTML elements with that XML.'" -
Porting to 64-bit Linux
An anonymous reader writes "As 64-bit architectures continue to gain popularity it is becoming more and more important to make sure that your software is ready for the shift. IBMDeveloperworks takes a look at a few of the most common pitfalls when making sure your applications are 64-bit ready. From the article: 'Major hardware vendors have recently expanded their 64-bit offerings because of the performance, value, and scalability that 64-bit platforms can provide. The constraints of 32-bit systems, particularly the 4GB virtual memory ceiling, have spurred companies to consider migrating to 64-bit platforms. Knowing how to port applications to comply with a 64-bit architecture can help you write portable and efficient code.'" -
Nice Performance Tuning For UNIX
Professor writes "Be 'nice' to your computers and examine some general guidelines for tuning server performance. A computer is like an employee who does tasks for you -- it's a good idea to keep from overburdening them. Keep this from happening by using the UNIX 'nice' command." -
Computer Science as a Major and as a Career
An anonymous reader writes "IBM DeveloperWorks is running an interesting Q&A with Director of IBM's Academic Initiative, Gina Poole. In the article she talks specifically about taking computer science as a major and ultimately as a career. From the article: 'There are a couple of reasons [for the decline in science and engineering degrees]: one is a myth, believed by parents, students, and high school guidance counselors, that computer science and engineering jobs are all being outsourced to China and India. This is not true. The percentage of the total number of jobs in this space is quite small -- less than 5%. According to a government study, the voluntary attrition in the U.S. has outpaced the number of outsourced jobs to emerging nations. Further, for every job outsourced from the U.S., nine new jobs are actually created in the U.S.'" -
Recommended Reading List for PHP
Steve writes "IBM developerWorks has put together a PHP recommended reading list. It provides resources for developers and admins adopting PHP and tackling advanced topics such as building extensions and writing secure code. There's also a list of books and blogs for keeping up with changes to the language itself." -
Build Your Own Java Performance Profiling Tool
An anonymous reader writes "IBM DeveloperWorks has an interesting look at creating a custom profiler using Java 5 and AOP. From the article: 'Profiling is a technique for measuring where software programs consume resources, including CPU time and memory. This article provides a list of best-of-breed features you might look for in an ideal profiler and explains why aspect-oriented techniques are well suited to achieving some of those features. It also introduces you to the JDK 5.0 agent interface and walks you through the steps of using it to build your own aspect-oriented profiler.'" -
What is UNIX, Anyway?
Lieutenant writes "Technology professionals have loosely used the term "UNIX" since the first person had to explain the difference between the Berkeley and AT&T flavors, so it's not surprising to find as many UNIX standards as there are versions of the operating system. Peter Seebach wades through the wellspring of UNIX standards and sorts them out for you, concluding that the rumors of the death of UNIX are (as usual) greatly exaggerated." -
IBM's High Performance File System
HoosierPeschke writes "BetaNews is running a story about IBM's new file system, General Parallel File System (GPFS). The short and skinny is that the new file system attained a 102 Gigabyte per second transfer rate. The size of the file system is also astonishing at 1.6 petabytes (petabyte == 1,024 terabytes). IBM has up a page with more information and specs on the system.." -
Exploring Active Record
An anonymous reader writes "Everyone knows that no programming language is a perfect fit for every job. This article launches a 'new series by Bruce Tate that looks at ways other languages solve major problems and what those solutions mean to Java developers. He first explores Active Record, the persistence engine behind Ruby on Rails.'" -
Better Networking with SCTP
5-0 writes to tell us that IBM DeveloperWorks has an interesting look at the key features of SCTP in the Linux 2.6 kernel and the ability to deliver multi-streaming. "SCTP is a reliable, general-purpose transport layer protocol for use on IP networks. While the protocol was originally designed for telephony signaling, SCTP provided an added bonus -- it solved some of the limitations of TCP while borrowing beneficial features of UDP. SCTP provides features for high availability, increased reliability, and improved security for socket initiation." -
SWT, Swing, or AWT - Which Is Right For You?
An anonymous reader writes "Why is there more than one Java GUI tool kit? The best answer is that one size does not fit all, nor is there a one-size-fits-all GUI tool kit to be invented soon. Each tool kit offers advantages and disadvantages that make selecting one more appropriate, given your needs and intended audience. Read descriptions of each tool kit's basic features, and the pros and cons of using each." -
Going Dynamic with PHP
Five-Oh writes to tell us that IBM DeveloperWorks has an interesting article about the OO advantages of PHP V's new features. From the article: "PHP V5's new object-oriented programming features have raised the level of functionality in this popular language significantly. Learn how to use the dynamic features of PHP V5 to create objects that bend to fit your needs." -
Advanced Requests and Responses in Ajax
An anonymous reader writes "The Web is no longer a place where simple applications are tolerated; 'users have become more advanced, customers expect robustness and advanced error reporting, and managers are fired because an application goes down 1 percent of the time. It's your job then, to go beyond a simple Ajax application that requires a more thorough understanding of XMLHttpRequest.' This DevWorks article tries to help developers use Ajax to build a solid foundation in which an application handles errors and problems smoothly." -
Test Coverage Leading You Astray?
An anonymous reader writes "Are your test coverage measurements leading you astray? Test coverage tools bring valuable depth to unit testing, but they're often misused. This article takes a closer look at what the numbers on the coverage report really mean, as well as what they don't. It then suggests three ways you can use your coverage to ensure code quality early and often." -
IBM Sets DB2 Database Free (Beer)
Anonymous Coward writes to tell us that in the hopes of winning more developer interest, IBM has released a free version of their DB2 database. From the article: "DB Express-C is the same database as IBM's commercial offerings but the company places limits on what kind of hardware it can run on. It can be deployed on systems with two processor cores or up to two dual-core chips on Advanced Micro Devices- or Intel-based servers. The memory limit is 4GB but there are no limits on the size of database or number of users. " -
The Future is XHTML 2.0
An anonymous reader writes "As with its past, the future of HTML will be varied, some might say messy, but I believe XHTML 2.0 will ultimately receive widespread acceptance and adoption. A big move in this direction will be in Embedded devices such as phones and digital TVs, which will have no need to support the Web's legacy of messy HTML, and are free to take unburdened advantage of XHTML 2.0. This Developer Works article examines the work of the World Wide Web Consortium (W3C) in creating the next-generation version of their XHTML specification, and also their response to the demand for 'rich client" behavior exemplified by Ajax applications.' -
Explore the Linux Memory Model
Constable On Patrol writes to tell us that IBM DeveloperWorks has an interesting look at the 'fundamentals of how memory is constructed and managed' in the Linux memory module. The article serves as a great intro to the basics of memory management for Linux design and implementation. From the article: "This guide includes an examination of the segment control unit and the paging models as well as a detailed look at the physical memory zone." -
IBM Open Sources UIMA
psykocrime writes "Line56 is reporting that IBM has open-sourced core components of their UIMA project. UIMA is (or was) an IBM Research Project for managing "unstructured information" such as free-text. IBM describes UIMA as: 'an open, industrial-strength, scalable and extensible platform for creating, integrating and deploying unstructured information management solutions from combinations of semantic analysis and search components. [...] and makes the core Java framework available as open source software to provide a common foundation for industry and academia to collaborate and accelerate the world-wide development of technologies critical for discovering the vital knowledge present in the fastest growing sources of information today.' The newly opened source is available at SourceForge." -
Asynchronous Requests with JavaScript and Ajax
An anonymous reader writes "I rarely read an entire article about a single object, especially one that is this simple. However, you will use this object over and over again in each page and application that you write that uses Ajax. This article shows you how to create XMLHttpRequest instances in a cross-browser way, construct and send requests, and respond to the server." -
Boosting Socket Performance on Linux
Cop writes "The Sockets API lets you develop client and server applications that can communicate across a local network or across the world via the Internet. Like any API, you can use the Sockets API in ways that promote high performance -- or inhibit it. This article explores four ways to use the Sockets API to squeeze the greatest performance out your application and to tune the GNU/Linux® environment to achieve the best results." -
Secure Java Apps on Linux using MD5 Crypt
An anonymous reader writes "If you are a security developer and need to interface a Java application with the local operating system user registry, what do you do? IBMDeveloperWorks gives you the answer: 'UNIX/Linux PAM (Pluggable Authentication Module)-compatible systems that use authentication based on the GNU MD5 extensions to the crypt() system call. It will describe these extensions and show you a Java implementation of MD5 crypt (using FreeBSD as my UNIX).'" -
Tapestry Making Web Development a Breeze?
An anonymous reader writes "IBM DeveloperWorks has an interesting article on how to simplify your Web-based development with Tapestry, an open-source, Java-based framework that makes developing a breeze. The article shows you around Tapestry, from installation to file structure. See for yourself how Tapestry facilitates servlet-based Web application development using HTML and template tags." -
The Boot Loader Showdown
An anonymous reader writes "What utility do practically all Linux users use, regardless of their job or expertise? A boot loader. In this article from IBM, see how a boot loader works, meet two popular loaders -- LILO (LInux LOader) and GNU GRUB (GRand Unified Boot loader) -- and review the pros and cons of each." From the article: "Most simply, a boot loader loads the operating system. When your machine loads its operating system, the BIOS reads the first 512 bytes of your bootable media (which is known as the master boot record, or MBR). You can store the boot record of only one operating system in a single MBR, so a problem becomes apparent when you require multiple operating systems. Hence the need for more flexible boot loaders."" -
2005 Good Year for Power Architecture
An anonymous reader wrote to mention an IBM article looking back on what the piece calls the best year ever for the Power Architecture. From the article: "While IBM is considered by many to be an 800lb. gorilla, in the microelectronics space, it is actually very small -- last year IBM was way down at number 21 on the iSuppli list of the top 25 semiconductor suppliers worldwide. Now, that isn't necessarily a bad thing: for instance, it means that IBM Semiconductor solutions is small and nimble and competitive -- and this agility (coupled with the fact that we do get to share Research and some other resources with the parts of IBM that are 800lb. gorillas) has led some to predict that the IBM chips division will be named the fastest growing semiconductor supplier of 2005. In fact, there is a very good chance that IBM may regain the coveted #18 spot on iSuppli's list this year!" -
IBM iSeries or Windows server?
Rabid Cougar asks: "I am the network administrator for a small manufacturing company. Our current ERP system has outlived its usefulness and we are in the process of selecting another package. Our present ERP system runs on an IBM AS/400, but there are those in the company who believe we should switch to something that only runs on Windows. My position is this: if we can find software that will meet our needs that runs on an IBM iSeries (new name for the AS/400) then we'd be certifiably crazy to move over to the Windows platform. A co-worker insists there are a ton of reasons to avoid the iSeries like the plague. I'm not trying to start a flamewar, but if you were to bet your career on this issue, which side would you choose and why?" -
Why Use GTK+?
An anonymous reader writes "IBM DeveloperWorks is running an interesting student article that introduces users to the world of GTK+. It explains what GTK+ is, why you should consider using it, and the benefits it provides. Together with the rest of the series, this installment provides enough introductory information that, if you decide to use GTK+ in your own projects, you'll know where to look for further materials." -
System on a Chip Concurrent Development
An anonymous reader writes "The old silo method of chip development, with hardware and firmware developers barely interacting with each other, won't cut it in today's fast-moving industry. IBM DeveloperWorks has the third in a series of articles about system-on-a-chip design. The author, Sam Siewert, displays the development tools and processes that speed system on a chip design and get all your developers working together effectively." -
Ruby Off the Rails
An anonymous reader writes "IBM DeveloperWorks has an interesting writeup on Ruby that takes a look at the programming language as a stand-alone solution rather than defining it in terms of Rails. From the article: 'Ruby on Rails is just one facet of what makes Ruby great, just like EJB is only part of the Java enterprise platform. Andrew Glover digs beneath the hype for a look at what Java developers can do with Ruby, all by itself. Ruby's syntax is quite different from that of the Java language, but it's amazingly easy to pick up. Moreover, some things are just plain easier to do in Ruby than they are in the Java language.'" -
Run Linux as a Windows Screensaver
zornorph writes "A software engineer at IBM has come up with a way to 'construct and package a Linux® LiveCD so that it will install using the standard Microsoft® Windows® install process and will operate as a standard Windows screensaver.'" -
Retrofit Your Web Pages For Wireless Compatibility
An anonymous reader writes "You probably don't want to maintain Web and wireless versions of the same site or take on the overhead of Extensible Markup Language (XML) transformations. This article shows you a more practical approach to wireless compatibility. With some well-designed XHTML, a bit of CSS, and the media attribute, you can do wonders. Create more flexible, Mobile device ready, Web pages with XHTML and CSS." -
Dependency Injection with AspectJ and Spring
An anonymous reader writes "IBM DeveloperWorks has an interesting article about the complementary aspects of dependency injection and aspect-oriented programming. Adrian Colyer, Chief scientist of Interface21, examines how to combine these two techniques to 'facilitate advanced dependency injection scenarios.' From the article: 'Dependency injection and aspect-oriented programming (AOP) are two key technologies that help to simplify and purify domain models and application layers in enterprise applications. Dependency injection encapsulates the details of resource and collaborator discovery, and aspects can (among other things) encapsulate the details of middleware service invocations'" -
Under the Hood of the Xbox 360
An anonymous reader writes "IBM DeveloperWorks is running a behind the design story for the making of the Xbox 360. The 360 has but a single chip with 165 million transistors for it's CPU " From the article: "This chip is in fact a three-way symmetric multiprocessor design. The three PowerPC cores are identical, except that they are physically reflected through the X and Y axis. Each of the CPU cores is a specialized PowerPC chip with a VMX128 extension related to (and partially compatible with) the VMX instructions in the G4 and G5 CPUs. The three CPU cores share a 1MB Level2 cache. Each processor has 32KB each of data and instruction Level1 cache. The chip's front-side bus/physical interface has a 21.6GB/second bandwidth, and runs at 5.4GHz." -
Mastering Ajax Websites
An anonymous reader writes to tell us that IBM DeveloperWorks has an interesting article introducing the uninitiated to the world of Ajax. From the article: "Ajax, which consists of HTML, JavaScript technology, DHTML, and DOM, is an approach that helps you transform clunky Web interfaces into interactive Ajax applications. The author, an Ajax expert, demonstrates how these technologies work together. Ajax is more than just the latest fad -- it's your stepping stone to build better Web sites through efficient use of your time." -
The Future of HTML
An anonymous reader writes "HTML isn't a very good language for making Web pages. However, it has been a very good language for making the Web. This article examines the future of HTML and what it will mean to Web authors, browser and developers. It covers the incremental approach embodied by the WHATWG specifications and the radical cleanup of XHTML proposed by the W3C. Additionally, the author gives an overview of the W3C's new Rich Client Activity." -
PlayStation Touch Screen for Your Linux Box
hebertrich writes to tell us that IBM DeveloperWorks has an interesting article about how to modify a PlayStation LCD for use as a touch screen panel for your Linux box. From the article: "Historically, the lack of friendly interfaces has been an obstacle to making Linux® a commercially viable product for end users, but with available GUIs, that's yesterday's news. What's the next step in creating an easy-to-use Linux-based product for consumers? Imagine adding a user-oriented LCD touchscreen. A touchscreen facade can make back-end Linux applications very usable in such devices as custom digital media centers (either in the home or in automobiles), DVRs and PVRs, and even control interfaces for household robots."