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An ASM specification of C# threads and the .NET memory modelModern object-oriented programming languages like Java or C# support multithreaded programming. They allow several threads to run concurrently sharing objects on the heap in the same address space. Each thread has its own frame stack, program counter, local variables and registers. The languages have special syntactical constructs for synchronization. Java has a synchronized statement and synchronized methods, while C# has a lock statement and several attributes that can be applied to classes and methods to control their run-time synchronization behavior.
Although the C# programming languages supports multi-threaded programming directly via special syntax, the underlying thread model is poorly documented and still considered to be part of the library. The Ecma standards for C# [4] and the Common Language Infrastructure [5] contain only a few paragraphs about threads. For example, the lock statement is defined in by a reduction to the library functions Monitor.Enter and Monitor.Exit which are not further specified there. Important issues, such as the order of writes to volatile and non-volatile fields, are just briefly mentioned in two paragraphs in. Hence, a program developer has to rely solely on the class library documentation that comes with Microsoft’s .NET framework Software Development Kit. Unfortunately, that documentation is not very precise with respect to threads, locks and memory issues. Moreover, it is not identical with the (XML) specification of the types that comprise the standard li- braries in [5, Partition IV, Profiles and Libraries]. For example, specifications of Thread.Interrupt, Thread.Suspend and Thread.Resume are not included in.
If a programmer cannot rely onDealing with Facebook Phenomenon EffectivelyThe tone of recent news stories about the dangers of Facebook has been quite hysterical and many IT directors can be forgiven for feeling under threat from the phenomenon. But is a blanket ban for the site the best approach or merely a knee-jerk reaction, perhaps a more tailored approach with network management tools is appropriate?
Dangers come in threes
In some regards, IT directors are right to be anxious. Facebook usage is horribly addictive and many users admit to spending at least two hours a day on the site during working hours. Not only is this a massive drain on productivity, it also hits company resources hard and opens up some significant security threats to boot. Estimates from some organisations are quite alarming; a figure of £130m per day in lost productivity for UK businesses has been widely referenced and this is probably the key reason why 50% of employers have now banned the site completely.
192.com, the search engine, decided to prohibit the site completely after it was discovered that add-on applications used by ‘Facebookers’ were absorbing 40% of the company’s available internet connection. Hackers have of course cottoned onto the infiltration opportunities that Facebook presents and the coming months will doubtless see an increasing number of security scares. Personal security is also a potential minefield as many users are blithely sharing personal information on Facebook which could fuel identity theft and phishing attacks. News now comes that Facebook has agreed a deal to make users’ names and photos available onSAP Help Guide: Time Zones TutorialUse Processes which cover more than one time zone primarily affect logistic functions such as availability checks, production planning, delivery scheduling, statistics and service provision, but they also affect financial accounting in areas such as treasury, inter-company transactions, and so on. This function enables you to use dates and times that are comparable and exchangeable in applications that are implemented worldwide. For time-related applications, the SAP system can use local dates and times for proposed dates and validations (for example, to ensure that a requested delivery date is not in the past).
Time Zone Management in Global Systems Global Application Generally, users think and act in terms of their local time, and they also expect to use their local time in business transactions. When the SAP System is used for global transactions that span time zones, business partners and systems will have different local times. These differences in local times can lead to problems such as late postings and missed batch runs.
Download SAP Help Guide: Time Zones TutorialClient-Server Socket Programming ProjectThis project serves as an introduction to client-server programming. You will be expected to implement an abstract protocol called Simple Registration Protocol using simple TCP socket programming. To illustrate the use of the protocol, you will also implement a concrete application: a simple appointment management system. This application will introduce you to the use of LAMP (Linux, Apache, MySQL and PHP), a free, powerful and commonly-used combination for Web-based applications.
The SRP uses a client-server model where multiple client processes request services from a server using request messages. These requests are answered using reply messages. The SRP includes only one mandatory request message (called REQ) and one mandatory reply message (REP). REQ is sent by a client to the server to indicate a specific application-defined service (e.g. reservation, confirmation, information request). The server responds with a REP message, the contents of which is specific to each type of request. The server should check the validity of each request and should not fail if an invalid request is received.
The client follows these three steps to make a request:
1. Establishes a TCP connection with the server,
2. Sends the request to the server, and
3. Closes the connection.
If the request is valid, the server
1. Opens a TCP connection to the client,
2. Sends the reply, and
3. Closes the connection.
Note that the REQ and REP messages are sent in two separate TCP sessions. The client will close the existing REQ TCP session and wait for the server to open a new TCP session for the REP.
Download pdfMetaprogramming RubyDomain-Specific Languages for Programmers Metaprogramming • My definition: “programming your programming.” • Change the way you program in your programming language. • Transform your general -purpose language … • Make it a domain-specific language. • Program in a language designed for the problem you’re solving. isp • Metaprogramming seems to have originated in Lisp. Lisp is a programmable programming language. —John Foderaro In Lisp, you don’t just write your program down toward the language, you also build the language up toward your program. —Paul Graham • Lisp isn’t the only programmable language Ruby.
Rubyists have been rediscovering metaprogramming. • Ruby style and idioms are still changing and adapting. Rails leverages metaprogramming heavily. • To great effect! • Ruby is a natural for metaprogramming.
Download pdf Metaprogramming RubyTutorial for 3dsmax : How to bind a biped's hand to a dummy objectStep 01
Linking an object to a dummy can be very usefull. For example if you want an 3D human model to open an door you need to link the biped's hand to the door-handle. Linking a biped requires a different approach then a standard 3dsmax object. In this example we are creating a very basic scene with a biped object and a dummy object.
First create a biped by going to the systems panel > biped, and drag one out in your viewport. Also create a Dummy object. A dummy object is found in the Helpers tab. You can see the image below for reference.
Step 02
Select you biped’s hand and goto the motion panel. First expand the KeyInfo properties and next expand the IK properties. Click on “Select IK Object” and choose your dummy object. When you have selected the dummy object you need to set some properties for the IK-link
Download pdf Tutorial for 3dsmax : How to bind a biped's hand to a dummy objectHonda Customs 2006 PDF ManualLegendary Dreams Forever Powered By Dreams At Honda, we’re driven by the Power of Dreams. It encourages us to challenge convention and to think in new ways. That’s why our motorcycles, cars, ATVs, marine engines and power equipment products are winning acclaim the world over. Honda is leading the way in engine technology and product innovation, and is all set to revolutionise the jet sector. Then again, wouldn’t you expect that from the world’s largest engine manufacturer and the number one in motorcycles, respected for its engineering excellence and renowned ‘Honda’ performance.
The Custom motorcycling experience is powered by your dreams of freedom and independence. Honda’s legendary line-up of custom motorcycles offers well-sculpted and reliable machines that pack ample power and a comfortable cruising attitude. Whether you go for the dynamic VTX1800 or get your first taste of Custom biking with the Shadow, you are bound to become part of Honda’s great Custom tradition.
Download Honda Customs 2006 PDF Manual3d modelling for Virtual Reality Tutorial #2 – VRML sliding doorThis tutorial will guide you through one way of setting up an animated sliding door in a vrml world using 3ds max. You will be provided with a prepared AutoCAD (3rooms.dwg) model of three rooms, comprising walls, ceiling, floor and a door, as shown above. You will import the AutoCAD model to 3ds max. You will apply lights, materials, cameras, and a navigation helper as previously done in the Tutorial #1 – VRML room of primitives! tutorial. You will animate the door to make it slide, and then create a ‘touch sensor’ helper to control the door opening.
Finally you export as a virtual reality model in the form of a VRML file. You will view and interact with the VRML file (world, *.wrl) using a web browser. When completed you will be able to freely navigate around and view the internal spaces and click on the door to open it.
Download 3d modelling for Virtual Reality Tutorial #2 – VRML sliding doorWeb 2.0 and beyond – changing the map, anywhere, any deviceWe have seen Web 2.0 technologies used to create new web GIS applications. In this paper Eamon Walsh, Chief Technology Officer for eSpatial examines technologies progressing the industry from the first Web 2.0 GIS applications.
Key new capabilities include:
• Annotating and updating spatial data rather than just viewing and searching, using “pure web” technologies rather than desktop GIS tools.
• Data input from other consumer devices, such as cell phones.
• Working with organizations’ own data (including large databases) rather than just points of interest on standard maps.
Technologies considered include:
• AJAX
• Data input from cell-phones, including innovative mechanisms for determining location.
Examples will be presented, including from a multi-disciplinary research project in this area - “ICING”, being carried out by a group including city governments, technology providers, and universities ( http://fp6-project-icing.eu ).
We also look at how these capabilities are now moving from “mash-ups” to eGovernment and commercial systems, for both public access and internal use. Such systems range from “eCommunity” through to more traditional GIS areas such as Defense. In this we consider the requirements that prompted some organizations to move from sites based on “mash-ups” to systems built using commercial geospatial technology deployed in-house.
Download pdf Web 2.0 and beyond – changing the map, anywhere, any deviceHair Care Book ManualHair Care Tips for
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Feeling Fit and Looking Fine
This booklet is about hair care for women who are physically active or planning to be. Regular exercise improves your health and helps you feel good about yourself. Some women say that concern for their hair style can get in the way of exercise. Having neat and stylish hair has always been part of our culture. This booklet offers tips to make hair care easier for active women.
Physical Activity can
3 Reduce stress
3 Burn off extra calories
3 Boost your confidence and improve self-esteem
3 Lower your risk for diabetes, cancer, and heart disease.
Engaging in physical activity may mean extra time and care for your hair. Here are some tips to follow before, during, and after exercise to keep your hair looking fine.
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