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The Physiology of the Grid pdfIn both e-business and e-science, we often need to integrate services across distributed, heterogeneous, dynamic “virtual organizations” formed from the disparate resources within a single enterprise and/or from external resource sharing and service provider relationships. This integration can be technically challenging because of the need to achieve various qualities of service when running on top of different native platforms. We present an Open Grid Services Architecture that addresses these challenges.
Building on concepts and technologies from the Grid and Web services communities, this architecture defines a uniform exposed service semantics (the Grid service); defines standard mechanisms for creating, naming, and discovering transient Grid service instances; provides location transparency and multiple protocol bindings for service instances; and supports integration with underlying native platform facilities. The Open Grid Services Architecture also defines, in terms of Web Services Description Language (WSDL) interfaces and associated conventions, mechanisms required for creating and composing sophisticated distributed systems, including lifetime management, change management, and notification. Service bindings can support reliable invocation, authentication, authorization, and delegation, if required. Our presentation complements an earlier foundational article, “The Anatomy of the Grid,” by describing how Grid mechanisms can implement a service-oriented architecture, explaining how Grid functionality can be incorporated into a Web services framework, and illustrating how our architecture can be applied within commercial computing as a basis for distributed system integration—within and across organizational domains.
Download The Physiology of the Grid pdfHands-On Python A Tutorial Introduction for BeginnersAlthough Python is a high-level language, it is not English or some other natural human language. The Python translator does not understand “add the numbers two and three”. Python is a formal language with its own specific rules and formats, which these tutorials will introduce gradually, at a pace intended for a beginner. These tutorials are also appropriate for beginners because they gradually introduce fundamental logical programming skills. Learning these skills will allow you to much more easily program in other languages besides Python. Some of the skills you will learn are
• breaking down problems into manageable parts
• building up creative solutions
• making sure the solutions are clear for humans
• making sure the solutions also work correctly on the computer. Guiding Principals for the Hands-on Python Tutorials:
• The best way to learn is by active participation. Information is principally introduced in small quantities, where your active participation, experiencing Python, is assumed. In many place you will only be able to see what Python does by doing it yourself (in a hands-on fashion). The tutorial will often not show. Among the most common and important words in the tutorial are “Try this:”
• Other requests are for more creative responses. Sometimes there are Hints, which end up as hyperlinks in the web page version, and footnote references in the pdf version. Both formats should encourage you to think actively about your response first before looking up the hint.
The tutorials also provide labeled exercises, for further practice, without immediate answers provided. The exercisesAJAX for Mobile DevicesOver the last 12 years, Microsoft Corporation has developed a successful operating system for mobile devices based on Windows CE, currently known as Windows Mobile. The Windows Mobile deliverable consists of (1) a particular set of Windows CE components, (2) a logo test kit requirements document, (3) a set of light weight middleware applications, and (4) commercialization components, such as drivers and value-added services provided by OEMs and Mobile Operators. Microsoft licenses the Windows Mobile OS to third parties, (generally OEMs and MOs), who commercialize and sell the operating system as part of a device and service offering.
Microsoft entered the embedded device space with Windows CE in 1992, after many years of creating desktop operating systems. Microsoft’s desktop strategy centered on the idea of “platform,” and we brought this idea to the device space. The notion of a vibrant and compelling third party software ecosystem was perceived a necessity for success. That said the small, handheld device is not a PC, and the limitations of the battery powered device, with a small screen, and intermittent and variable network connectivity, make a successful software ecosystem a difficult proposition.
Web applications
The last five years have seen the growth of “Web 2.0” and AJAX as a new approach to developing applications on the desktop, hosted in the web browser. Before the rise of AJAX, web “applications” were extremely limited in the types of interactivity that they could deliver. Web pages hosted content, and while web sites quickly acquired the ability to dynamically adjust thatTraits in CSharpThe main focus of this work is on identifying interesting and important aspects of introducing traits to CSharp. We also identify required and optional features for statically typed languages as well as conflict situations. The implementation presented in this paper is a simple prototype (a preprocessor) based on the trait flattening property [9]. It is meant to be a study case for a clean implementation.
The main problem concerning traits and statically typed languages like CSharp is about typing traits and to keep the ability to share code easily. Many approaches already exist in theory. This practical work contributes to the research about traits by presenting a simple prototype, showing the possibilities and difficulties in integrating traits in statically typed languages.
Although the focus of this work is on CSharp most of the results are directly applicable to other typed object-oriented languages. The implemented “trait flattening framework”, kept mostly language independent, would also work for most other c-like languages (with only slight modification).
Section 2 shortly introduces traits. The following sections cover the basics about CSharp, give a short overview about a first dirty-prototype done in CSharp itself and contain some more extensive descriptions, results and practical research by doing the final implementation using Smalltalk.
Download pdf Traits in CSharpEudora Email 6.0 User Manual for MacintoshWhat s New in Eudora Email 6.0 15 System Requirements 16 Opening and Configuring Eudora 16 Open Eudora 16 Getting Started Settings 17 Hosts Settings 18 Specifying POP or IMAP for the Incoming Mail Server Protocol 20 Importing from Other Email Programs 21 Using Eudora in One of Three Modes 22 Choosing an Operating Mode and Registering Eudora 23 Quitting Eudora 25 Getting Help 25 Reporting a Bug 26 Technical Support 27 About Security (Sponsored and Paid modes only) 28 Using SSL
28 Creating Messages 31 Creating an Outgoing Message 31 Using the Composition Window 31 Title Bar 31 Icon Bar 32 Formatting Toolbar (Text Styles) 34 Message Header 37 Message Body 38 Saving a Message for Later Changes 38 Setting the Message Priority 39 Requesting a Return Receipt (Sponsored and Paid modes only) 40 Formatting Text (Sponsored and Paid modes only) 41 Text Editing Menu Commands 42 Other Formatting Options 45 Inserting Objects in Message Text (Sponsored and Paid modes only) 45 Attaching a File to a Message 47 Sending Attachments to non-Eudora Users 49 Inserting the Contents of a Text File into a Message 49 Including a URL in a Message (Sponsored and Paid modes only) 50 Checking Your Spelling (Sponsored and Paid modes only) 50 Checking Your Spelling Automatically 51 Checking Your Spelling Manually 52 Check Spelling on Send or Queue 54 Adding Custom User Dictionaries 54 Using MoodWatch 55 Using MoodWatch for Outgoing Messages 56 Using MoodWatch for Incoming Messages 57 Sending Messages and Checking Mail 58BoKS Access Control for Desktops and Microsoft Active DirectoryWith Active Directory, Microsoft has provided administrators with a powerful directory service to organize network data and to control access to network resources from a central point. However, "powerful" by necessity also means complex, and the complexity of Active Directory has probably contributed to slowing down the rollout of Windows 2000 and 2003 servers. Initially, many organizations found simply migrating their flat NT4 domain structures into a more sophisticated Active Directory wrapping to be a significant challenge. By now, many have defined their Active Directory Forests, survived an often cumbersome deployment process, and seen their directories mature into efficient tools for centralized administration. Policies have become the levers of network management, and, as a result, Active Directory has become a repository holding extremely sensitive data.
Passwords Remain the Weakest Link in the Security Chain
Surprisingly, in most organizations, authentication is still based on passwords only, regardless of how sophisticated their use of Active Directory otherwise may be. Ideally, in a pure Windows 2000 / XP environment, Windows clients use NTLM 2 or Kerberos to protect authentication requests, which is certainly a great improvement compared to the old LM or NTLM 1 protocols. Yet, by default and for backwards compatibility, Windows clients will revert to the old, weaker protocols if required to do so by one of the nodes involved.
Although you can configure clients to refuse LM and NTLM 1 communication, this may conflict with other important services, and the gain is limited since password cracking tools such as @stake LC™ 5 (L0phtCrack™),The Python TutorialPython is an easy to learn, powerful programming language. It has efficient high-level data structures and a simple but effective approach to object-oriented programming. Python's elegant syntax and dynamic typing, together with its interpreted nature, make it an ideal language for scripting and rapid application development in many areas on most platforms.
The Python interpreter and the extensive standard library are freely available in source or binary form for all major platforms from the Python Web site, http://www.python.org/, and may be freely distributed. The same site also contains distributions of and pointers to many free third party Python modules, programs and tools, and additional documentation.
The Python interpreter is easily extended with new functions and data types implemented in C or C++ (or other languages callable from C). Python is also suitable as an extension language for customizable applications.
This tutorial introduces the reader informally to the basic concepts and features of the Python language and system. It helps to have a Python interpreter handy for hands-on experience, but all examples are self-contained, so the tutorial can be read off-line as well.
For a description of standard objects and modules, see the Python Library Reference document. The Python Reference Manual gives a more formal definition of the language. To write extensions in C or C++, read Extending and Embedding the Python Interpreter and Python/C API Reference. There are also several books covering Python in depth.
This tutorial does not attempt to be comprehensive and cover every single feature, or even every commonly used feature. Instead,iChoose – an Introduction to AJAX on MobilesWhen Symbian was formed 10 years ago, it inherited a browser from Psion. In the following years, the ability to browse real Web pages became a key differentiator of smartphones as compared to feature phones, and so Web technologies have played an important role in the story of Symbian. At the time of Symbian’s formation, there was much debate in the industry on whether the future of personal and enterprise computing would be in thick or thin clients – that is, in rich client software running mainly on the phone, or software hosted on a network server with a fairly simple browsing terminal. Ten years later and we see AJAX blurring the gap between the notion of thin and thick clients with rich browsing terminals backed with colossal arrays of servers dishing out email, photos, twitters and Facebook messages.
To summarize, early mobile Web browsers provided poor user experience and low bandwidth, with initiatives such as WAP failing to deliver compelling content to match the expectation of a mobile Web. The situation has greatly improved recently, and now that devices such as the Nokia N95 and Apple iPhone provide very capable desktop-grade browsers, content providers are starting to produce simpler, mobile versions of their sites in order to improve the user experience (for example, see Facebook and Google’s applications).
The WebKit-based Web browser looks likely to become the de facto standard for mobile Web. Aside from its adoption into the Symbian ecosystem as part of S60, WebKit also provides the engine forCisco 2600 Series Gateway-PBX InteroperabilitySet Up. ? Alcatel PBX Configuration. ? Cisco 2621 Gateway Configuration ....The following is the configuration of the Cisco 2621 gateway connected to the ...
Page 1 Cisco 2600 Series Gateway-PBX Interoperability: Alcatel 4400 with BRI Q.931 Signaling This document describes the interoperability and configuration of a Cisco 2600 series voice gateway with an Alcatel 4400 PBX using BRI Q.931signaling. It includes the following sectio: • System Components • Configuration Tasks • Caveats System Components PBX Model Alcatel 4400 PBX PBX Release Veion R3.2, Veion c1.712 Telephony Signaling BRI Q.931 Voice Gateway Cisco 2621 Gateway Release Cisco IOS TM 12.2(1a) VoX Protocol H.323 Configuration Tasks See the following sectio for configuration tasks for this feature: • Set Up • Alcatel PBX Configuration • Cisco 2621 Gateway Configuration Cisco 2600 Series Gateway-PBX Interoperability: Alcatel 4400 with BRI Q.931 Signaling Set Up This section includes the following information: • Connectivity Diagrams • Set Up Notes Connectivity Diagrams Figure 1: Test Configuration Figure 1 represents the configuration used for testing: an Alcatel 4400 connected to a Cisco 2621 voice gateway via a BRI
Get PDF.NET 2.0: Responsive IT Solution for Your Enterprise ApplicationsSolutions | J2EE to .NET 2.0 Migration
Since almost two years, there has been an active debate over the endurance of the two giant enterprise platforms, Microsoft‘s .NET and Sun‘s Java 2 Platform, Enterprise Edition (J2EE). Which technology would emerge as the leading platform for developing new web applications?
Now that the combat has settled down a bit, each platform has managed to capture a substantial share of market for itself. In fact, many organizations have arranged for a strategy for one or the other of these frameworks. But many (e.g. those which have large investments in the legacy systems) are still evaluating the merits of the two platforms. The IT personnel in those businesses is questioning as to what extent would choosing .NET or J2EE influence their host strategy, etc.
It's getting harder, not easier, to pick a clear winner, because J2EE and .NET are so similar. With J2EE and .NET, selection may be based less upon intrinsic merits of the platforms and more on your existing environment (e.g. resources, investments) and personal preference or style. Instead of choosing your platform based on marketing hype or technical bias, you can look at more bottom-line factors:
• What assets does your company already possess (software, hardware, middleware)?
• What level of experience do you have in people who know both your business and your implemented technology?
• Will upgrading that system asset result in a positive ROI for the business? Adopting this philosophy of architecture will provide the greatest stability and ROI over time, not whether
