Tuesday, September 29, 2009
PowerPoint Presentation On AJAX
Presentation On AJAX
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AJAX Presentation Transcript:
1. ContentsThis presentation demonstrates the following topics.
2. APPIN KNOWLEDGE SOLUTIONS
Appin Knowledge Solutions is an education consulting company dedicated to providing quality consulting, training & e-learning solutions in education sector. Appin group of companies was incorporated in March 2003 in Austin Texas under the XIRS Ventures Inc. The first ones in the industry to come up with Distance learning programs in Embedded Systems, VLSI & Nano-Technology. Appin Knowledge Solutions, with its Asia-Pacific Head Quarters in New Delhi, is an affiliate of Appin Group of Companies based in Austin, Texas
3. What is AJaX?
A name given to an existing approach to building dynamic web applications. Web pages use JavaScript to make asynchronous calls to web-based services that typically return XML allows user to continue interacting with web page while waiting for data to be returned page can be updated without refreshing browser results in a better user experience there are AJaX libraries that reduce the amount of JavaScript code that must be written Uses a JavaScript class called XMLHttpRequest
4. A is for “asynchronous” requests can be made asynchronously technique allow web page to be updated without refreshing it J is for “JavaScript” typically JavaScript is used on the client-side (in the browser) can use any language on server-side that can accept HTTP requests and return HTTP responses X is for “XML” request and response messages can contain XML can contain any text
5. XML Http Request
A JavaScript Class that lets you make asynchronous HTTP requests from JavaScript. Make an HTTP request from a JavaScript event. A call back JavaScript function is invoked at each state of the HTTP request and response.
6. onreadystatechange - call back function for state changes readyState - the current state of the HTTP call responseText - the text result of the request responseXML - DOM xml object from the request status - HTTP status code of the response statusText - HTTP status text
7. DWR
DWR, stands for Direct Web Remoting. Is a combination Java/JavaScript open source library that allows you to simply and easily build Ajax applications. Allows to call server-side code in a way that looks like it is running locally in the browser from the point of view of the client-side.
8. About the Project
It provide the ability to see a tree view of the directory structure of the server the application is running on. Provides facility to perform basic operations of copying files and directories, moving files and directories Provides the ability to edit the files. Uploading and downloading files. When select a directory from the tree, it shows the contents of that directory in a grid, showing us the item’s name, size, type, and last modified date/time. Implement security check using container-managed J2EE security UI look similar to Windows Explorer.
9. Thanks.
PowerPoint Presentation On I Mode
Presentation On I Mode
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I Mode Presentation Transcript:
1. i mode - Historyi-mode was launched in Japan on 22 February 1999. The content planning and service design team was led by Mari Matsunaga, while Takeshi Natsuno was responsible for the business development. Further Developments: Dec. 1999 i-mode compatible handsets with color screens were marketed Jan. 2001 i-appli service launched Jul. 2001 i-area service launched Nov. 2001 i-motion service launched Jun. 2002 i-shot service launched Jan. 2003 i-motion mail service launched Sep. 2005 i-channel service launched Oct. 2006 keyword search service for i-mode launched
2. What is i mode???
NTT DoCoMo's i-mode is a wireless internet service popular in Japan. Unlike WAP, i-mode encompasses a wider variety of internet standards, including web access, e-mail and the packet-switched network that delivers the data. i-mode users have access to various services such as e-mail, sports results, weather forecast, games, financial services and ticket booking. Content is provided by specialized services, typically from the mobile carrier, which allows them to have tighter control over billing.
3. i mode Server
The iMode server is a regular Web server. It can reside at NTT DoCoMo or at the Enterprise. DoCoMo has been acting as a portal and so “normally” maintains the iMode server. For future implementations with advanced security requirements, it is possible to host the iMode server at the Enterprise.
4. (PDC-P) Personal Digital Cellular-Packet
iMode provides Internet service using Personal Digital Cellular-Packet (PDC-P) and a subset of HTML 3.0 for content description . iMode allows application/content providers to distribute software (Java applets) to cellular phones and also allows users to download applets (e.g., games). iMode uses packet switched technology for the wireless part of the communication and is carried over TCP/IP for the wired part of the communication. The mobile packet communications system has a network configuration in which the packet communications function is added and integrated into DoCoMo’s Personal Digital Cellular (PDC) which is the digital system for portable and automobile telephones.
5. Protocols
TLP Improved efficiency in PDC-P network over TCP (uses fewer packets to save charges) Higher data packet ratio No 3-way handshake, control signals can piggyback data ALP Supports both pull (HTTP) and push style communication Direct HTTP communication between mobile phone and iMode server UITP (User Information Transfer Protocol) sends subscriber information from PDC-P network to iMode server NWMP (Network Management Protocol) performs signaling Start/end of packet communication E.g. email delivery, push content notification
6. How does i-Mode work?
The i-Mode service uses an additional packet communication network that is built onto DoCoMo's main network. This packet data transmission technology allows for constant connectivity.Thus, users are not charged for how long they are online, since this time is unlimited. Rather, users are charged only for how much information they retrieve. There are essentially 4 main components that are required for the i-Mode service. 1)A cellular phone capable of voice and packet communication and with a browser installed. 2)A packet network. 3)An i-mode server. 4)Information providers.
7. Security Issues
1. Security of the radio link between iMode handset and the cellular base station. 2. Security of the transparent public Internet connection between iMode sites and the handset in the cHTML layer. 3. Security of private networks on iMode. 4. Security of private network links between the iMode center and special service providers such as banks. 5. Password security.
8. Security Protocols
iMode security relies on “standard” Internet security as provided by SSL(Secure Sockets Layer). The security protocols used within the DoCoMo network and over the air are proprietary protocols that run over SSL (using the packet switched capabilities of the DoCoMo network). iMode recently adopted SSL (in March, 2001). Before this, iMode provided ‘only air interface security’.
9. i-mode Related Services
i-appli: i-mode with Java This service group consists of software (programs) used with i-mode compatible mobile phone terminals. Downloading the software makes it possible to automatically update the news and weather forecast displays as well as to play new games. i-area: Location Based Service This is DOCOMO's location information service. The i-area service enables the user to check the weather forecast, traffic and store information and other convenient information for local areas as well as the map information to the user's current location.
10. For more please refer our PPT. Thanks.
PowerPoint Presentation On Java Projects
PPT On Bank Management System In Java
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Online Examination In Java
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The Exam Simulator In Java
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PowerPoint Presentation On Holography
Presentation On Holography
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Holography Presentation Transcript:
1. What is Holographic Memory ?It is a memory that can store information in form of holographic image. It is a technique that can store information at high density inside crystals or photopolymers. It provides data to be written beneath the surface of the disc. Holographic memory can store up to 1 Tb in a storage medium the size of a sugar cube crystal.
2. Why do we need this ?
“For Internet applications alone, industry estimates are that storage needs are doubling every 100 days” By the year 2010, a storage system serving an average LAN will need … 100 TB and a WAN server will require 10TB to 1 petabyte …of storage” (Red Herring)
3. Properties of Hologram
A block or sheet of photosensitive material which records the diffraction of two light sources. A laser beam is splatted into two beams: Source beam Reference beam The two beams diffracts to form the image on the recording medium
4. Spatial light modulator
It is used for creating binary information out of laser light. It is a 2D plane, consisting of pixels which can be turned on and off to create binary 1.s and 0.s. It contains a two-dimensional array of windows, which are only microns wide.
5. Page Data Access
As the data is stored in the form of holograms, data retrieval must be in the same form. So, a holographic system sends data in the form of pages. It provides fast access times.
6. Error Correction
As the density of data is massive, it is prone to errors. Errors can be controlled by: Recording errors Page level parity bits Interfacing
7. Recording Errors Cause:
Noise generated by laser beam Result: Can change a binary 0 to binary 1 Possible Solution: Improvement in laser beam and recording material
8. Page-level Parity Bits
Data is stored in the form of 2-D array Odd no. of bits accounts for parity 1 Even no. of bits accounts for parity 0 Parity check bits are used to identify any errors present in the array
9. Interfacing
While reading the data, they are sent to the computer as sheets. Such thing may exceed the processor throughput Remedy: Defining set of rules which can be used for correction and reading of data efficiently.
10. For more please refer our PPT. Thanks.
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