Rev 2.0
New User Computing Guide
This document was created to assist Stanford Linear Accelerator (SLAC) employees
and collaborators in familiarizing themselves with computing resources.
To modify this document, please contact Charles Cline.
Page 1
Rev 2.0
Table of Contents
New User Computing Guide ............................................................................................... 1
Table of Contents ................................................................................................................ 2
Introduction to SCCS .......................................................................................................... 3
Getting Computing Help ..................................................................................................... 3
Password Policy .................................................................................................................. 4
How to Change Your Password .......................................................................................... 4
Network Storage and Drives ............................................................................................... 6
Overview ......................................................................................................................... 6
Clean Up and Proper Use of Network Storage ............................................................... 6
Backups ........................................................................................................................... 7
Restores ........................................................................................................................... 7
OpenAFS........................................................................................................................... 11
Windows Authentication .................................................................................................. 11
Email ................................................................................................................................. 12
Address Books .............................................................................................................. 12
Outlook 2003 Mailbox Cleanup.................................................................................... 13
Recovering Deleted Items ............................................................................................. 16
Printing.............................................................................................................................. 17
Adding a Printer ............................................................................................................ 17
What do I do when I suspect the print server is down? ................................................ 20
Wireless Networking and the Visitor Network ................................................................. 21
Document Management .................................................................................................... 22
Remote Access .................................................................................................................. 23
Citrix ............................................................................................................................. 23
Page 2
Rev 2.0
Introduction to SCCS
The Scientific Computing and Computing Services Group (SCCS) is dedicated to
providing leadership and support in computing and communications to the laboratory as a
whole. SCCS is located in building 50. Some of the different areas within SCCS are:
Computing Security - http://www2.slac.stanford.edu/computing/security/
Database Team - https://www-internal.slac.stanford.edu/database/dbteam/
Email - http://www2.slac.stanford.edu/comp/messaging/
Telecommunications - http://www2.slac.stanford.edu/comp/telecom/phone/phoneservice.htm
UNIX - http://www.slac.stanford.edu/comp/unix/unix.html
Getting Computing Help
Local administrators who are responsible for IT support can be found at
http://www2.slac.stanford.edu/comp/winnt/local-administrators.html. For fastest
resolution, the recommended way for requesting computing assistance is via email. Most
groups/departments have an email address that will generate a ticket from the contents of
the email and route it the appropriate team. Two examples of these email addresses are
ithelp-lcls (for the LCLS project) and ithelp-ppa (for the PPA Directorate). If you are
unsure of your group, you may send an email to ithelp and it will be routed appropriately.
Page 3
Rev 2.0
Password Policy
The current password policies as of this writing are:






Maximum age of 180 days or 6 months
Minimum of 8 characters
Cannot be dictionary words, your name, your account name, or common strings
Use 3 of 4 character sets (upper, lower, number, special)
Memory of 5 previous passwords
Lockout of account after 5 bad passwords in a 5 minute interval for a period of 30
minutes.
The most recent password policy can be found at
http://www2.slac.stanford.edu/computing/security/password/passwordpolicy.htm.
You may also find suggestions for selecting good passwords at
http://www2.slac.stanford.edu/computing/security/password/goodpassword.htm.
How to Change Your Password
If you have a UNIX and Windows accounts, it is recommended that you change your
UNIX password first, then your Windows password. The most recent instructions on
how to change your passwords can be found at
http://www2.slac.stanford.edu/computing/security/password/password1.htm
To change your password in UNIX:
1. Log into your UNIX shell on a Solaris or Linux system.
2. Type: password
3. Follow the prompt to change your password using the criteria above.
4. If you use the /bin/passwd program, it will not change your login password in
most cases -- rather it will claim the old password is incorrect.
5. The change to the password takes place immediately.
To change the password for an alternate account in UNIX:
1. Log into your UNIX shell on a Solaris or Linux system.
2. Type: password <alternate-account>
3. Follow the prompt to change your password using the criteria above.
4. If you use the /bin/passwd program, it will not change your login password in
most cases -- rather it will claim the old password is incorrect.
5. The change to the password takes place immediately.
Page 4
Rev 2.0
To change your password in Windows:
Note: Do not log in from a MAC or from Win95/98 to change your Windows password.
(the change may appear to be successful but could leave you with an old or null Windows
password). Be sure you are not logged onto a Windows machine in any other location
(and do not have scheduled processes running) or after you change your password there
will be a conflict causing your account to be locked. In case something should go wrong
and you need help, it is strongly suggested you do NOT change your password just prior
to leaving SLAC for the day or weekend. Change your password just before a break or
lunch so someone will be available to help if there is a problem.
1. Log into your account as usual, from a Windows machine.
2. Once logged in, press the CTRL-ALT-DEL keys all at once.
3. Click the "Change Password" button in the dialog box that comes up.
4. Follow the prompt to change your password using the criteria above, using TAB
or mouse to change fields.
5. Windows password changes should go into affect within an hour.
Windows users can also change their Windows password using this web page:
https://www-mail.slac.stanford.edu/iisadmpwd/aexp2b.asp
To change your MCC or "SCP" password:
1. Start a terminal session on mcc.slac.stanford.edu (use ssh rather than telnet)
2. Type set password and follow the prompts
To change your Oracle password on the SLAC_TCP instance (which has most of the
Oracle user accounts):
You can change a password on the SLAC_TCP system by going to the following URL.
You will be prompted for your Oracle account and its current password and offered the
opportunity to enter a new password.
https://oraweb.slac.stanford.edu/pls/slac/change_my_password
Note: If you have multiple accounts to change on SLAC_TCP, you will need to
completely exit all browsers and re-enter, using the above URL, for each subsequent
accounts.
For accounts on other instances of Oracle at SLAC:
You will need to log onto each instance using SQL Plus and issue the "Password"
command.
Page 5
Rev 2.0
Network Storage and Drives
Overview
Your computer will begin its logon process which will create a standard SLAC
environment. This environment includes connections to multiple networks locations.
SLAC staff and users are encouraged to keep their files in network folders where
possible. Files in these network folders will be backed up and available for restoration if
deleted or otherwise lost. These folders will appear on any SLAC domain computer
when you use your SLAC account. Hence, your network files will be available to you
from different machines. Furthermore, since these standard mappings are visible to all
users, files can be shared with other people. It is suggested that you store your data on
network storage rather than your local computer drive for the backup and sharing abilities
listed above.
Each user will see a U, V, and Z drive. They are connected to the following network
locations:
Drive Letter
U:
V:
Z:
Location
\\slac\my storage\users
\\slac\my storage\groups
\\slac\my storage\users\user initial\username
Clean Up and Proper Use of Network Storage
Please do not use the Z drive and other network drives for storing:


Program Files
There is no need for multiple copies of Microsoft Office executables, etc. to be on
the network drive which is on RAID storage and adds to the backup load.
Personal multi-media files (mp3, avi, mov, mpg, etc.)
Please clean up periodically so that network storage does not carry a lot of temporary and
junk files and add to maintenance and backup load. When cleaning up your Z drive,
please do not work off the U drive except to copy files from another user. The U drive is
just a reflection of ALL USER home directories (their Z drives). Therefore, if you delete
a file on the U drive, you will be deleting the same file on the Z drive.
If you maintain files used by your department, it is better to keep them on the V drive
group space. Having files in a user home directory makes it harder to clean up home
directories and delete user accounts when people leave. Ask your department Windows
Administrator regarding your department group space on the V drive.
Page 6
Rev 2.0
In order for administration duties to be performed, the permissions for files and
directories on all network drives must include:


System: Full Control
Administrators: Full Control
Backups
Full backups are done once a month, usually on the last weekend of the month. A full
backup set from the month before is kept off-site (vaulting).
Incremental backups are done during weekends between Full backups, and Daily
Differentials are done during the weekdays.
Each Monthly Full Backup is retained for one year. The Daily Differential and MidMonth Incremental backups are retained for one month.
Backups are performed on a daily basis and should be viewed primarily as a disaster
recovery mechanism, not as an archival system. This means that the backups are not
retained forever. See below for the backup retention times.
How long does a file have to exist before it is sure to be on a backup?
A file has to be on the server overnight for it to be picked up by nightly backup.
How long after a file has been backed up do I have to request it be restored?
Since only Full backup is kept for one year, a file has to have existed across the monthly
Full backup cycle for it to be available for restore for up to one year. If a file (or a
particular version of a file) existed shorter than this monthly cycle, then it will only be
available for restore for one month.
Restores
Copies of changed files on network storage are created daily at 5:00AM, 12:00PM and
5:00PM, so copies of changed files and folders are created 3 times a day, 7 days a week.
Users can restore files on their own by following these instructions:
Step 1: Identify a file or folder to restore
Identify the file or folder to restore (Note: if a file was deleted it will not show up unless
you use the "View" button on a folder in step 3). To restore a file or folder, right click on
a file or folder – you will see a window similar to the one figure 1.1. Click “Properties”.
Page 7
Rev 2.0
Figure 1.1
Step 2: Viewing Previous Versions
After opening the “Properties” window, click on the “Previous Versions” tab as seen in
figure 1.2
Page 8
Rev 2.0
Figure 1.2
Step 3: Viewing File or Folder
Preview the file or folder to make sure it is the information that you want, highlight the
version of file or folder you wish to view and click on the view button. This window
shows up to 64 copies of the file or folder (Copies are only created if the file has
changed). You may see this window in figure 1.3.
Page 9
Rev 2.0
Figure 1.3
STEP 4: Restoring File or Folder
Once you have determined which file or folder to restore, highlight the file or folder you
wish to restore, click on either the Copy or Restore buttons. Details and ramifications of
each action are listed below:
(Note: you cannot restore a file or folder that you do not have write access to).
View: This is to open the file or folder to view it. This is a handy action if your not sure
which file or folder you wish to restore or to view the contents before restoring or
copying the file. It is recommended that you use the view function to find the version of
the file or folder you are looking for before copying or restoring it.
Copy: This option allows you to copy the file or folder to some other location that is not
the original location. This is handy when you need to get information without over
writing the current copy.
Restore: This action restores the selected file or folder to the original location, over
writing the current file or folder in that location. Unless there is another backup of the
Page 10
Rev 2.0
file or folder, all currently in the file or folder is lost and is reverted back to the state of
the Snapshot. Use the restore action with EXTREME care!
NOTE: Both the Copy and Restore Actions DELETE that copy of the data. So once you
have decided to Copy the information to another location or you have decided to restore
the information to the original location, that Shadow Copy is removed from the list and
CANNOT be restored or copied again.
Recommendations
Do steps 1, 2, and 3 once you discover that you need a file or an entire folder recovered.
Before doing step 4, use the view button to view the contents of the file or folder to make
sure that it is the information you need recovered. Use the copy action to copy the
information to a new location for use. At that point you can rename the file or folder to
ensure that no other information is accidentally deleted. Use the Restore action ONLY if
the file or folder was deleted. If you use the restore action and the file or folder exists,
then the entire content is reversed to that copy. It is therefore recommended you restore
information to a new location. Also, when you restore from a previous version, once you
have restored the file or folder, it is removed from the previous versions tab.
Restore Request
If the above instructions do not contain the needed file, users may request the restoration
of their files or directories through the Windows Files Restore Request by going to
http://www2.slac.stanford.edu/comp/helptrak/Public/NTRestore_remedy1.asp?Catg=NT
&CItem=NTFS%20Restore&Carea=N/A. The SCCS system administrator has to carry
out the restore for you (since higher privilege accounts are needed for this operation), as
there is no user-initiated restore available. We will try to restore your files within a day,
depending on other backup/restore jobs that we are running. Sometime due to incomplete
information, we may need to ask more questions in order to restore the correct version of
the file.
OpenAFS
OpenAFS for Windows gives the capabilities of the AFS distributed file system to
Microsoft Windows operating systems, allowing you to map drives to AFS paths. The
OpenAFS software is located on https://xweb.slac.stanford.edu/, and installation
instructions can be found at
http://www2.slac.stanford.edu/comp/winnt/software/afs/Readme.htm.
Windows Authentication
When a Windows computer connects to a server or other remote machine, you might be
prompted to enter your credentials. Normally Windows passes your credentials to the
remote machine without you having to enter them – this is called Pass-Through
Authentication. In instances where you are asked to enter your credentials you will see a
Page 11
Rev 2.0
window similar to the one in figure 1.4. For Username enter slac\username and
Password is your Windows password.
Figure 1.4: Authentication Window
Email
Address Books
There are three kinds of address books in Outlook:
 Global Address List (GAL) - This is the primary address list for our organization's
Exchange e-mail system. All SLAC e-mail addresses are put here automatically,
whether they have Exchange accounts or not.
 Outlook Address Book - This is actually what you see as your Contacts folder.
 Personal Address Book - For those e-mail addresses you want to keep private and
store on your own computer. We do not recommend the use of Personal Address
Book, most of the time it only adds an extra layer of confusion.
Adding Contacts to Outlook
You can add Contacts as another address book to be searched when you are composing email. On the menu bar:
 Select Tools;
 E-mail Accounts;
 Click on Add a new directory or address book;
 Click the Next button;
 Click on Additional Address Books;
 Press the Next button;
 On the next window select Outlook Address Book;
Page 12
Rev 2.0



Press Next;
Click OK;
Restart Outlook.
After Outlook is restarted you will need to:
 Right click on Contacts;
 Select Properties;
 Click the Outlook Address Book tab and make sure the "Show this folder as an email address book" is checked.
Changing the way Names Appear in Contacts
To change the sort order of an Address Book:
 From the menu bar select Tools;
 E-mail Accounts;
 Select the View or Change Existing Directories or Address Books option;
 Click Next;
 Click the Change button;
 You can change the "Show names by" setting here if you want;
 Then press Close.
Setting Order of Address Books
If people use the Global Address List, they'll want it at the top of the search order. Others
prefer to have Contacts at the top of the search order; it's really a matter of preference and
can be changed any time. To change the order of the Outlook Address Book:
 Select Tools;
 Address Book;
 In the Address Book dialog box:
o Select Tools;
o Select Options;
o In the "Show this address list first" drop-down list select the address book
you want automatically displayed each time the Address Book or a Select
Names dialog box opens;
o To change the order in which the address books appear click the up or
down arrow on the right side.
Outlook 2003 Mailbox Cleanup
Do you know how big your mailbox is? What is the default size limit of an
Outlook/Exchange mailbox? How much e-mail are you storing? What happens when
you're near the limit? It is important to understand the answers to these questions so you
aren't prevented from sending and/or receiving e-mail.
The default mailbox size limit is 300MB. The limit is set up by SLAC's E-mail
Administrators and can be increased upon request, by sending an email to mailadmin@slac.stanford.edu.
Page 13
Rev 2.0
As you reach your limit, you'll get a message about the possibility of being unable to send
or receive messages (when approaching ~250MB). Don't panic, with these first warnings
you are still fully able to send and receive email messages. However, if you don't do
some cleanup you'll eventually receive some more warnings about not being able to send
messages (when approaching ~300MB). Finally, if you still don't clean up your mailbox,
you'll eventually be unable to receive messages at all (once limit is reached @350MB).
What can you do?
In Outlook 2003 there is a tool called Mailbox Cleanup used to manage the size of your
mailbox. You can use this tool to view the size of your mailbox and individual folders. It
can also locate any items that are older than a certain date or items larger than a certain
size. You can also View or Empty items in your Deleted Items folder. From the top menu
in Outlook 2003 select Tools, then Mailbox Cleanup and you'll see a window like the
one in figure 1.5.
Figure 1.5: Mailbox Cleanup
Finding Total Size of Mailbox and Individual Folders
Click on the "View Mailbox Size..." button. You'll see the total size of the mailbox and
individual mail folders.
Finding Large Messages
Page 14
Rev 2.0
Select "Find items larger than" and then fill in a size. Press Find... and you'll see an
Advanced Find window open and it will locate the messages. You can delete the
messages you no longer need.
Finding Old Messages
Select "Find items older than" and then fill in the number of days. Press the "Find..."
button. The Advanced Find window opens and it will locate the messages. You can delete
the messages you no longer need.
Cleaning Out Your Trash
Click on the "View Deleted Items Size..." button to view items in your Deleted Items
folder and/or press Empty to delete items from your Deleted Items folder. You can still
retrieve them via Recover Deleted Items feature for 30 days.
Finding Messages with Attachments
For this you'll use the Advanced Find feature directly. From the Tools menu select Find
and then Advanced Find. Press the Browse button and click on the top-most folder (e.g.
Mailbox - ...) and press OK. Select the More Choices tab and place a checkmark in the
box labeled "only items with - one or more attachments". You can fill in a minimum
size in the lower part of this window too if you want (e.g. "greater than" and "1000" to
find those > 1MB). Press the Find Now button and it will begin the search. When it is
completed you can delete the messages you no longer need from the displayed window.
Removing Attachments from messages
Based on the previous procedure (Finding Messages with Attachments); once you find
the messages with attachments, your may choose to remove the attachment only and
leave the original message in your mailbox:
Open the message in Outlook, right click the attachment, and select Remove. Then save
the message when prompted. Note that there will be no indication that there ever was an
attachment after this action is taken.
Reduce Items Count in Core Folders
For performance reasons, it's strongly suggested that both the "Inbox" and "Sent Items"
folders (known as Outlook Core folders) are kept with the minimum amount of items at
any given time. The recommended amount is between 2500 to 5000 items. A range is
given since email messages come in various sizes. The larger the messages in your
Inbox, the lesser the number of messages you ought to keep in it. To obtain optimal
performance for your online Outlook client, the contents of each of these two core folders
should not exceed 5000 items. This can be achieved by creating more mailbox folders
and moving/filing messages accordingly.
Extra Cleaning Tips
Page 15
Rev 2.0



With Outlook 2003, use the "Large Mail" under the "Search Folders" (bottom of
Outlook left pane) to identify really big saved messages. You'll see messages
grouped by Size categories (Enormous, Huge, Very Large and Large). Review
and delete those you don't need any longer.
Sort your "Sent Items" folder by size and remove large unneeded messages.
Look for mail items you may have in your "Junk E-mail" folder, review and
delete unwanted messages.
Recovering Deleted Items
From the Deleted Items Folder
By default, Exchange saves deleted items in the Deleted Items folder on the Exchange
server. To recover mail items from this folder:
Using Outlook 2003
 Click on the Deleted Items folder
 Select the item(s) you want to recover
 Click on the right mouse button
 Select Move to Folder
 Select the folder you want to move the mail items to and click OK
From the Dumpster
If mail items are no longer in the Deleted Items folder, you'll need to recover them from
the dumpster. When you empty your Deleted Items folder they are held in the "dumpster"
for 30 days.
To recover items from dumpster:
Using Outlook 2003
 Select "Deleted Items" folder
 Go to the top menu and select Tools, Recover Deleted Items
 Select the item(s) you want to recover
 On the menu bar in this window, click on the icon with the envelope (Recover
Deleted Items)
 They will be restored to your Deleted Items folder
 Move them to their original folder by using the instructions in the prior section
Using Outlook Web Access (https://www-mail.slac.stanford.edu) with Internet Explorer
 Select "Deleted Items" folder
 Go to the line of icons just above the folder headings and click on the one for
"Recover Deleted Items"
 A new window will pop up and you can select the item(s) you want to recover
 Then press the Recover button in the upper left of the window
 They will be restored to your Deleted Items folder
 Press the Close button to close this extra window
Page 16
Rev 2.0

Move them to their original folder by dragging them or by using the Move/Copy
icon.
Using Outlook Web Access (https://www-mail.slac.stanford.edu) with Firefox
 Select Options from the list at the left
 Scroll down until you find the Recover Deleted Items section
 Press the View Items button
 Select the item(s) you want to recover and press the Recover button at the top
 Press the Close button to take you back to the Options window
 Select Folders icon along the left and look in your Deleted Items folder for the
recovered item(s)
 Move them to their original folder by using the Move icon.
Printing
Adding a Printer
From the Windows Start Menu:
1. Select "Settings",
2. “Control Panel”
3. Then "Printers and Faxes".
4. Double-click on the "Add a Printer" icon or click “Add a Printer” under Printer
Tasks in the left window pane.
5. “Next” on the Add Printer Wizard
6. Select "A network printer, or a printer attached to another computer" (Figure
1.6)
Page 17
Rev 2.0
Figure 1.6
7. Click “Next”
8. Select “Find a printer in the directory” and click “Next” (Figure 1.7)
Page 18
Rev 2.0
Figure 1.7
Enter in the Name field “XXX” (XXX must be replaced by the 3 digit of the
building number that the printer is located in). The printer name is derived from
the building-room-manufacturer and model-device. The Location field gives
more detail information. You can see this window in figure 1.8.
e.g., printers in Building 084 (Central Lab Annex)
New Name
Old Name
Comment|
084-209-HP5100PS-01
HPCLA2
A or B size paper
084-209-HPMVPS-01
HPBCLA2
084-209-HP4500CPST-01
HP Color
transparency
9.
Page 19
Rev 2.0
Figure 1.8
11. Select the printer you wish to add and click OK.
12. Click "Next". (If you want this printer to be your default click “Yes” otherwise
selects “No”.)
13. Click “Finish”
What do I do when I suspect the print server is down?
The recommended practice is for printers to be served from the SCCS central print
servers (rather than from department print servers or peer-to-peer printing).
For printers that are on the SCCS print servers, each printer is served from 2 central print
servers (in the Server Name field, they are listed as scs050print01 and scs050print02)
to provide a backup print server when one of them is not working. When you suspect
that the print server you are connected to is down, go through the procedures above and
select the printer being served from the other print server.
Page 20
Rev 2.0
Wireless Networking and the Visitor Network
Wireless Networking
Wireless networking (802.11b/g) is supported in many locations at SLAC for staff,
visitors, collaborators, and conference attendees. You will be on the SLAC “visitor”
network which is outside the SLAC network. This means you will not have access to
internal SLAC network resources unless you use VPN. It is important to know that you
will not have full visitor network and internet access until you read and accept the SLAC
Acceptable Use Agreement. You can do this by performing the following:
1. To connect to the visitor network for the first time you will need to open a web
browser and attempt to connect to any normal internet web site (we suggest
http://www.slac.stanford.edu). If your browser was already running, you may
have to hit the “refresh” button. You will be redirected to a portal web page that
provides basic information about the SLAC Visitor Network and asks you to
provide some information about yourself. The purpose of asking you for this
information is so that SCCS can locate you in the event that your computer has a
virus or causes problems with the network. Before you can proceed to the
internet, you will need to agree to the SLAC Acceptable Use Agreement
regarding network use. After you agree, your system will be given regular internet
access. At this point you have internet access.
Laptop owners are strongly encouraged to check their laptop and wireless configuration
to ensure they adhere to recommended settings. Laptops that are not configured correctly
can (and have) shutdown wireless networking in the auditorium and other locations at
SLAC.
Recommended settings and information:
 Wireless adapter card:
802.11b or 802.11g
 Network configuration: DHCP
 SSID:
Set to ‘visitor’ or to allow any value
 Network Type:
Set to ‘infrastructure’
 Open access:
No WEP, no data encryption, no authentication
Some possible problem areas:
 Bridging must be turned off or disabled
hint: for Windows XP go to Network Connections, right click on the wireless
adapter. Check for bridging. Turn it off or disable it.
 Do not set the Network Type to ‘Ad hoc’
hint: for Windows XP see Network Connections, right click on wireless
adapter>Properties> Wireless Networks tab>Advanced. Select ‘Access point
(infrastructure) networks only’.
Page 21
Rev 2.0


Mac laptops - Turn off AirPort setting
hint: System Preferences>Network> Show:AirPort. Ensure that ‘Allow this
computer to create networks’ is not checked.
Personal access points are not allowed on the SLAC network
For help:
 If you have problems configuring your laptop check with your SLAC Desktop
Admin, conference coordinator, or fellow conference attendees.
 Contact your SLAC Desktop Admin
 In any case call the SCS Help Desk at x4357 and report it. When possible email:
net-admin@slac.stanford.edu. Even though you may have a correct configuration,
or corrected an incorrect one, the problem should still be reported in case
networking equipment needs resetting.
Document Management
SLAC Space is an enterprise information portal provided by SCCS to allow people,
teams and expertise to connect and collaborate. You can access SLAC Space by going to
https://slacspace.slac.stanford.edu.
Figure 1.9
Page 22
Rev 2.0
Remote Access
Citrix
Citrix is the preferred method for accessing SLAC’s Windows environment remotely.
Citrix enables members of the SLAC user community to access a Windows desktop or a
variety of common Windows applications through a Web browser from any location with
an internet connection. With Citrix, SLAC users can even access the Windows
environment from a Mac, Linux, or Solaris computer. The URL to access SLAC’s Citrix
farm is https://citrix.slac.stanford.edu. You will need to download and install the
Presentation Server Web Client Package. As of this writing the current version is 10.200,
and can be downloaded at
http://www.citrix.com/English/ss/downloads/details.asp?downloadId=1339765&productI
d=186&c1=sot2755.
Figure 1.10
Page 23