Networking Principles Essays - Scripting Languages, Variable

Networking Principles Dial-Up Scripting Command Language For Dial-Up Networking Scripting Support Copyright (c) 1995 Microsoft Corp. Table of Contents 1.0 Overview 2.0 Basic Structure of a Script 3.0 Variables 3.1 System Variables 4.0 String Literals 5.0 Expressions 6.0 Comments 7.0 Keywords 8.0 Commands 9.0 Reserved Words 1.0 Overview Many Internet service providers and online services require you to manually enter information, such as your user name and password, to establish a connection. With Scripting support for Dial-Up Networking, you can write a script to automate this process. A script is a text file that contains a series of commands, parameters, and expressions required by your Internet service provider or online service to establish the connection and use the service. You can use any text editor, such as Microsoft Notepad, to create a script file. Once you've created your script file, you can then assign it to a specific Dial-Up Networking connection by running the Dial-Up Scripting Tool. 2.0 Basic Structure of a Script A command is the basic instruction that a script file contains. Some commands require parameters that further define what the command should do. An expression is a combination of operators and arguments that create a result. Expressions can be used as values in any command. Examples of expressions include arithmetic, relational comparisons, and string concatenations. The basic form of a script for Dial-Up Networking follows: ; ; A comment begins with a semi-colon and extends to ; the end of the line. ; proc main ; A script can have any number of variables ; and commands variable declarations command block endproc A script must have a main procedure, specified by the proc keyword, and a matching endproc keyword, indicating the end of the procedure. You must declare variables before you add commands. The first command in the main procedure is executed, and then any subsequent commands are executed in the order they appear in the script. The script ends when the end of the main procedure is reached. 3.0 Variables Scripts may contain variables. Variable names must begin with a letter or an underscore ('_'), and may contain any sequence of upper- or lower-case letters, digits, and underscores. You cannot use a reserved word as a variable name. For more information, see the list of reserved words at the end of this document. You must declare variables before you use them. When you declare a variable, you must also define its type. A variable of a certain type may only contain values of that same type. The following three types of variables are supported: Type Description integer A negative or positive number, such as 7, -12, or 5698. string A series of characters enclosed in double-quotes; for example, Hello world! or Enter password:. boolean A logical boolean value of TRUE or FALSE. Variables are assigned values using the following assignment statement: variable = expression The variable gets the evaluated expression. Examples: integer count = 5 integer timeout = (4 * 3) integer i boolean bDone = FALSE string szIP = (getip 2) set ipaddr szIP 3.1 System Variables System variables are set by scripting commands or are determined by the information your enter when you set up a Dial-Up Networking connection. System variables are read-only, which means they cannot be changed within the script. The system variables are: Name Type Description $USERID String The user identification for the current connection. This variable is the value of the user name specified in the Dial-Up Networking Connect To dialog box. $PASSWORD String The password for the current connection. This variable is the value of the user name specified in the Dial-Up Networking Connect To dialog box. $SUCCESS Boolean This variable is set by certain commands to indicate whether or not the command succeeded. A script can make decisions based upon the value of this variable. $FAILURE Boolean This variable is set by certain commands to indicate whether or not the command failed. A script can make decisions based upon the value of this variable. These variables may be used wherever an expression of a similar type is used. For example, transmit $USERID is a valid command because $USERID is a variable of type string. 4.0 String Literals Scripting for Dial-Up Networking supports escape sequences and caret translations, as described below. String Literal Description ^char Caret translation If char is a value between '@' and '_', the character sequence is translated into a single-byte value between 0 and 31. For example, ^M is converted to a carriage return. If char is a value between

Fetal Monitoring in the 21st Century essays

Fetal Monitoring in the 21st Century essays Wouldnt you or your family want to have the ability to see your unborn baby whenever you wanted? As technology evolves and our families grow, so does the need for families to connect to their unborn child. Ultrasounds have come a long way in the last decade. When families would go to the doctor for an ultrasound, they would get to see a small fuzzy or darkened area that the doctor would say was the baby. The doctor would also use a specialized microphone to let parents hear the babys heartbeat. Todays technology has allowed hospitals to provide a crisp and clear image that utilizes either three or four dimensional viewing. Right now, the ability to perform at home heart monitoring has grown exponentially with new devices. When parents, especially soon to be mothers are able to feel, see, or hear the baby, the emotional connection grows. The gap between being able to view your baby at the hospital and also at your home has not been fulfilled. During the World War II, there were many researches of the radar and sonar which led to the development of the ultrasound device. English physician Ian Donalds invention of the ultrasound in 1957, and then being used on pregnant woman in 1958, provided families an insight into the world of the unborn baby. This technology has fueled the need to see an unborn baby has become a family need. Ultrasounds are sound waves of very high frequencies that can easily penetrate through human flesh. When the waves penetrate through the body, they are affected by different materials such as the bone and internal organs. The materials affect the ultrasound waves to bounce back to the source. Because the waves reflecting back differently, medical personnel can identify the tissue type by the nature of the reflection. Doctors are also able to detect major anatomical abnormalities or birth defects are visible on an ultrasound. Without the invention of the ultrasound device, doc...

The Basis of Christianity Term Paper Example | Topics and Well Written Essays - 2000 words

The Basis of Christianity - Term Paper Example Although Christianity claims that there is just one God, the assign three different elements to this singular God. These elements include God himself as the Father, Jesus Christ as the Son and the third element is that of the Holy Spirit. Churches are where Christians gather to worship and the spiritual leaders of Christianity are either called priests or ministers. Their holy book of guidance is the Bible which consists of both the Old as well as the New Testament. Celebrated holidays in Christianity include Christmas and Easter which mark important milestones in the Western secular calendar.   These facts are perhaps well known to anyone who has ever heard the Christianity. The reason for choosing them as a community to base anthropological research had nothing to do with those facts but more with the Christianity’s extremely interesting and rich historical past as well as some of their values.   Christian socialism is a religious socialism that is based on the teachings and wisdom of Jesus Christ. Several Christian socialists believe that capitalism is idolatrous and has roots in greed. Greed is considered as a mortal sin in Christianity (Hastings, Mason, and Pyper).   Christianity teaches its followers some core values which, if followed, can lead the followers living a happy and prosperous life. Their first belief is having faith in one God. All Christians worship one God and consider it to be the most important thing in life. Second, which Christianity tells its followers is to respect other people. It is their core concept to give respect to other people irrespective of their age or gender. As it is written in the Bible, â€Å"Love your neighbor as yourself.† There is no commandment greater than these." (NIV, Mark 12:31). The word â€Å"love† carries respect for others in itself.