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Working with C# SerializationAt some point in the development of most software applications, design decisions are made about how to store and retrieve application data. For example, if your application reads and writes to disk files, you need to make basic choices about how to represent the data on disk. In this column we want to look a bit at C# I/O issues, and in particular at a mechanism called serialization. Serialization is used to convert C# objects into bytestreams, in a standardized way, so that those objects can be saved to disk or sent across a network.
The Need for Serialization
Let’s start by considering a couple of examples. The first one writes a floating-point value to a text file and then reads it back:
using System;
using System.IO;
public class SerialDemo1 {
public static void Main() {
// write double value to text file
double d1 = 0.1 + 0.1 + 0.1;
StreamWriter sw =
new StreamWriter("out", false);
sw.WriteLine(d1);
sw.Close();
// read double value back from text file
StreamReader sr = new
StreamReader("out");
string ln = sr.ReadLine();
double d2 = Double.Parse(ln);
sr.Close();
// compare values
if (d1 != d2) {
Console.WriteLine("d1 != d2");
Console.WriteLine("difference = " +
(d1 - d2));
}
}
}
When this program is run, the result is:
d1 != d2
difference = 5.55111512312578E-17
For some reason, our attempt to store a floating value in a text file fails. If we know much about floating-point, we may not be surprised, given that many decimal values have no exact representation in binary. For example, the common value 0.1 is the sum of an infinite series of binary fractions. Somehow our initial value got changed a bit, due to roundoffPostini IM Security User’s Guide pdfWhat is Postini IM Security? Postini IM Security is a service that helps protect your computer and the company as a whole from unwanted and malicious instant messaging (IM) content. IM has become a valuable tool for business communications, but as the use of IM continues to grow there’s an increased risk of malware infection (IM worms and viruses), spim (IM spam), and other security threats. This service provides protection for instant messaging by:
• Blocking IM worms and viruses
• Filtering incoming IM messages for spim
• Filtering message content based on your company’s messaging policies
• Allowing or disallowing file transfers based on your company’s messaging policies
• Blocking IM file transfers that contain viruses
How does this affect me? Once Postini IM Security is activated, you’ll be prompted to register your screen name while using your IM client. For details, see the next section, “How to Register for Postini IM Security”. To connect to IM at work, you must be a registered user. Your buddies and contacts don’t need to be registered to send instant messages to you.
Get Postini IM Security User’s Guide pdfCisco 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 PDFVisor Handheld User Guide Manual Macintosh EditionIntroduction to Your Visor” Handheld Getting to know your handheld What is a Visor handheld? System requirements Upgrade information Visor components Charging the battery Connecting the cradle Tapping and typing Tap with the stylus to get things done Elements of the handheld interface Opening applications Using menus Four ways to enter data Customizing your handheld Palm Desktop software Using your handheld with another PIM Installing a Springboard module
Chapter 2: Entering Data in Your Handheld Using Graffiti writing to enter data Writing Graffiti characters Graffiti tips The Graffiti alphabet Writing capital letters Writing numbers Graffiti numbers Writing punctuation marks Writing symbols and extended characters Writing accented characters Accent strokes Additional non-English characters Navigation strokes Graffiti ShortCuts Using the onscreen keyboard Using your computer keyboard Importing data Using an external keyboard Chapter 3: Managing Your Applications Using the Applications Launcher Selecting applications Switching between applications Categorizing applications Changing the Applications Launcher display Choosing preferences Installing and removing applications Installing add-on applications Installing games Removing applications Removing Palm Desktop software Security Assigning a password Changing or deleting a password Locking your handheld Recovering from a forgotten password Chapter 4: Overview of Basic Applications Date Book Date Book Plus Address To Do List Memo Pad Calculator CityTime Expense Chapter 5: Common Tasks Creating records Editing records Entering text Edit menu Deleting records Other ways to delete records Purging records Exchanging and updating data: HotSync operations Performing a HotSync operation for the first time Categorizing records System-definedDOSCH DESIGN TUTORIAL Using HDRIs in 3ds max A Step-by-Step GuideThis tutorial show you how to use HDRIs in 3ds max by using Vray or Brazil r/s. Things you will need for this tutorial. 3D Studio Max 4.xx or above Vray or Brazil r/s HDRI files from one of the Dosch Design HDRI collections the scene files delivered with this tutorial About HDRI There are two types of images. Low Dynamic Range Image(LDRI) and High Dynamic Range Image(HDRI). The first one comprises “normal” bitmaps [like JPEG, TIFF, BMP…], bitmaps which have 8 bits per pixel, with values between 0-255 [in RGB mode]. Which means that there are only 256 levels of luminosity, which doesn’t cover by far the range that can be captured by a real camera, with different levels of exposure.
On the other end we find HDRI, whose values can get a lot higher then 256. The main feature is that the value of each pixel is proportional with the quantity of light on each pixel. Basically, instead of just storing colors on the screen like normal bitmaps do, the HDR format stores the quantity of light per pixel. Meaning we can have more then 256 levels of luminosity.
Download DOSCH DESIGN TUTORIAL Using HDRIs in 3ds max A Step-by-Step GuideMicrosoft Windows Vista animated mouse pointer loader vulnerability analysisMicrosoft Windows Vista, like previous versions, supports animated mouse pointer. The animated mouse pointers are loaded from .ANI files by the functions from USER32.DLL called LoadCursorIconFromResource and LoadCursor. These functions use an internal function called _LoadCursorIconFromFileMap which, under certain conditions, is prone to a buffer overflow
To understand the vulnerability, a basic knowledge about the .ANI file format is required. The .ANI file starts with a magic value “RIFF”, followed by a DWORD containing the data length, and followed by another magic value “ACON”. The rest of the file is based on chunks. Each chunks starts with a four byte identification word (“anih” for ANI header, “fram” for frames, etc), and a DWORD containing the chunk length. For example, the length of the “anih” ANI header is always 36 bytes long, so the eight bytes of the chunk would be “anihx24 ”.
The internal function responsible for reading the animated pointer from the file is called _LoadCursorIconFromFileMap and is located in the USER32.DLL. The function tries to determine if the file has more than one frame, and if so, it calls another internal function called _LoadAniIcon.
Download pdf Microsoft Windows Vista animated mouse pointer loader vulnerability analysisCyberinfrastructure and Web 2.0Cyberinfrastructure 1 and e-Science 1 are conventionally presented in terms of Grid technologies 2 3 that support remote access to computational science resources (such as supercomputers), distributed data management, networked instruments and similar technologies. Web Services are a key technology for realizing this vision 4 5. In contrast to these heavyweight approaches, however, many important innovations in network programming are emerging outside the (by now) traditional Web Services framework and are collectively known as Web 2.0 6. As we discuss in this chapter, these developments need to be tracked and incorporated into the e-Science vision.
This chapter reviews some of the core Web 2.0 concepts by considering their impact on e-Science activities. For a related perspective on these issues, see 7. Web 2.0 is not a specific set of technologies and is best characterized as a movement towards network programming for everyone. The blurred distinction between a Web application and a Web tool (such as Google’s My Maps and Yahoo’s Pipes applications) means that even non-programmers can make sophisticated custom Web applications. In contrast to Web 2.0, the Enterprise-centric view of Web technologies holds that Web development is the domain of highly trained programmers working in very sophisticated development environments with complicated service interface and message specifications. Enterprise technologies are characterized by various Web software vendor efforts from Microsoft, Oracle, IBM, Sun, HP, and others. Grid computing is closely aligned (through the Open Grid Forum 8, for example) with Enterprise computing.
The numerous Web Service specifications (collectively known as WS-*) have formedIntroduction to Microsoft Access 2003Microsoft Access 2003 is a powerful, yet easy to learn, relational database application for Microsoft Windows. This tutorial is designed for users who are new or only have little experience using Access 2003. It introduces fundamental database concepts and operations and illustrates how they are performed in Microsoft Access 2003. This tutorial does not cover all of the features and functions of Microsoft Access 2003; emphasis will be on basic and frequently-used features, such as the creation of tables and queries, or importing spreadsheet into Access.
Please be aware that Microsoft Access is only available for Windows users; Mac users may want to seek out a FileMaker Pro Tutorial.
Objectives
By using this tutorial, you will learn to perform the following operations in Access 2003:
• Launch Access and identify the parts of the screen.
• Define fields and field properties constructing table structures.
• Enter and edit records in a table.
• Find, sort data.
• Design custom queries to display data.
• Import and export data between Excel and Access.
Download pdf Introduction to Microsoft Access 2003Advanced Rigging tools in MayaA tutorial for using the Zoo Character Setup Toolkit
Synopsis: The zooCST is a plugin for the Maya 3d program which enables automated rigging of characters. In this tutorial, I’ll describe the steps needed to rig a basic biped character. Zoocst by Hamish McKenzie: http://www.macaronikazoo.com/ Tutorial by Jerry Kalkhof: http://www.jerryartist.com
Requirements:
Maya7.0 or above ZooCST plugin
A simple biped mesh
A simple skeleton joint system.
1. Installation first install the zooCST plugin run the zooCST script from Maya script editor
note: the interface gui seems to be sensitive – wiggling it around will crash Maya 7.
2. create a basic skeleton inside your biped mesh
Download pdf Advanced Rigging tools in MayaIntegrating RDBMS into an LDAP EnvironmentIn this tutorial, we will assume that our organization has a single LDAP directory containing some information about our
users, while a MySQL database is used to contain further information about users that is accessible via a web
interface. For now, we will simply work toward providing a means for LDAP-ready applications to access data within
the MySQL database used by our web application. This is easily achieved using VDS.
Assumptions
1. VDS is installed and configured properly; VDS is currently running.
2. An LDAP directory such as Active Directory is already installed and accessible from the computer on which VDS is installed.
3. A MySQL database server is already installed and accessible from the computer on which VDS is installed.
4. A MySQL database called "test" has been created, and contains a table called "users" with a schema that contains the following items:
`uid` varchar(25) NOT NULL,
`password` varchar(40) NOT NULL,
`Title` varchar(255) default '',
`FirstName` varchar(255) default '',
`LastName` varchar(255) default '',
`Company` varchar(255) default '',
`EmailDisplayName` varchar(255) default '',
`EmailAddress` varchar(255) default ''
5. The MySQL table called "users" is populated with at least one entry.
6. The LDAP directory is accessible on port 389 (default ldap port) and the MySQL server is accessible on port 3306 (default mysql port).
7. Port 3890 is available on the computer in which VDS is installed.
Download pdf Integrating RDBMS into an LDAP Environment
