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Understanding astigmatismAstigmatism in an aberration that results when an optical system focuses two … exhibits no astigmatism. The lens is symmetric in the horizontal and
Astigmatism in an aberration that results when an optical system focuses two orthogonal axes of light at two different distances in space. Holograms and holographic optical elements intentionally produce, or unintentionally suffer, from astigmatism. To explain the basic properties of astigmatism, though, we choose a simpler optical model using spherical and cylindrical refractive lenses.
Spherical lens with no astigmatism
The ideal version of the common spherical lens, of which a typical magnifying glass is an example, exhibits no astigmatism. The lens is symmetric in the horizontal and vertical directions (indeed, all directions), and thus has an optical power that doesn’t vary depending on whether the angle that light strikes the lens isNEC Versa Series Docking Station 6000 Users ManualIntroducing the NEC Docking Station 6000 What’s in the Box NEC Docking Station 6000 Features Front and Left Side Features LEDs and the Volume Control Knob Back Features Internal Features The Right Environment Operating Environment Storage Environment Docking Station 6000 Care Precautions Routine Care Battery Charging Docking/Undocking the NEC Versa Hardware Setup Connecting the Power Cable Preparing the NEC Versa for Docking Docking the NEC Versa Undocking the NEC Versa Normal Undocking Emergency Undocking Setting Up and Using the Software Plug and Play Systems Non-Plug and Play Systems Running the Setup Utility Windows for Workgroups Setup Windows 95
Setup Docking Station 6000 Setup Software Choosing a Configuration Option Configuration Drivers Quick Start Adding Options Cover Removal Cover Replacement Expansion Boards Precautions Slot Locations Installation Removal Data Storage Devices Preparing the Drive Installing Drives in the Front Bay Removing the Drive Cage Attaching the Drive to the Drive Cage Attaching the Cables Finishing Up Hard Disk Drives Preparing the Hard Disk Drive Specifying Master and Slave Drives Installing the Drive Attaching IDE Drive Cables Attaching SCSI Drive Cables VersaBay II Adapter Installation Removing the Drive Cage Securing the NEC VersaBay II Adapter Attaching Cables Finishing Up Connecting Peripheral Devices External Monitor External Keyboard External Mouse External Audio Options Microphone Headphones or Speakers Headphones Speakers Line In/Line Out Line In Line Out Telephone Cable Gaming Devices Parallel Devices Serial Devices External SCSI Devices Specifications Pin Assignments Keyboard and Mouse Ports COM Port Printer Port Monitor Port AT Interface Connectors Expansion Port Solving ProblemsTeaching Programming with Python and PyGameWhile we are enormously pleased with Python as a programming language for introductory classes, we did note a few issues which were awkward or confusing to Intro students. We want to make it clear in discussing these issues that we are only speaking from the point of view of novice programmers. Experienced programmers might well have very different views.
First, console input presents a problem: input() is not appropriate for strings and raw_input() either requires dealing with types and typecasting or puts us back in the realm of magic. In our experience getting input is one of the largest sources of errors for Python beginners. This has lead to our writing a simple input function which returns an integer, float or string, depending on the input string. (See example on http://tech.canterburyschool.org/pycon/) This function handles our students' needs but does have the disadvantage of not being part of the language “out of the box”.
A second and related issue for novices is the way Python handles types. In contrast to the rigid insistence upon type compatibility found in C++ and Java, Python seems less predictable to the beginner. Type compatibility is not needed for assignment, is needed logically, but not syntactically, for the comparison and equality operators, and is required for the + operator. Confusion about this behavior is probably the second most common source of errors for inexperienced programmers.
Finally, in common with C++ and Java, Python has different operators for assignment and equality, even though its syntax enforces correct usage. Again likeAjax on RailsIn a few short months, Ajax has moved from an obscure and rarely used technology to the hottest thing since sliced bread.
This article introduces the incredibly easy-to-use Ajax support that is part of the Ruby on Rails web application framework. This is not a step-by-step tutorial, and I assume that you know a little bit about how to organize and construct a Rails web application. If you need a quick refresher, check out Rolling with Ruby on Rails, Part 1 and Part 2.
Just in case you've been stranded on a faraway island for most of the year, here's the history of Ajax in 60 seconds or less. In the beginning, there was the World Wide Web. Compared with desktop applications, web applications were slow and clunky. People liked web applications anyway because they were conveniently available from anywhere, on any computer that had a browser. Then Microsoft created XMLHttpRequest in Internet Explorer 5, which let browser-side JavaScript communicate with the web server in the background without requiring the browser to display a new web page. That made it possible to develop more fluid and responsive web applications. Mozilla soon implemented XMLHttpRequest in its browsers, as did Apple (in the Safari browser) and Opera.
XMLHttpRequest must have been one of the Web's best kept secrets. Since its debut in 1998, few sites have used it at all, and most developers, if they even knew about it, never used it. Google started to change that when it released a series of high-profile webCharacter Animation Tutorialhen creating animations, you should be very careful what you do with the FloorRef. When walking or running, the character should stay at a constant height from the FloorRef object. When jumping, the Character should increase it's distance from the FloorRef object to give the appearance of translation away from the floor. Characters should ALSO have a "stationary root" that only moves relative to the floor reference (e.g. for walking, jumping etc.) but that does not move constantly (i.e. in an idle animation the root should not move). This is very important if you wish to use your Characters with the Virtools Mulituser Pack, or the dead reckoning algorithm used for predicting distributed objects will not work correctly.
In short: Make sure the (stationary) root element does not move at all when the character is in its default ('wait' or 'idle') animation. For other animations make sure the root moves a minimum; in a walk animation along the Z axis for example, make sure that the root moves along the Z axis only - there should be no movement on the X or Y axes.
Note: Ensure the animations you create are 'real' in the sense that the Character actually performs them and does not 'pretend' to perform them - e.g. for a walk animation you should ensure that your character actually moves (translates) in your modeling application, and does not perform the animation in situ ("on the spot" or "in place").
This tutorial is designed to show you the exporting data processVPN Client User Guide for Mac OS X pdfUnderstanding the VPN Client 1-1 Connection Technologies 1-1 VPN Client Overview 1-2 VPN Client Features 1-3 Program Features 1-3 Authentication Features 1-5 IPSec Features 1-5 VPN Client IPSec Attributes 1-6 CHAPT E R 2 Installing the VPN Client 2-1 Verifying System Requirements 2-1 Gathering Information You Need 2-1 Obtaining the VPN Client Software 2-2 Preconfiguring the VPN Client 2-2 Preconfiguring the User Profile 2-3 Preconfiguring the Global Profile 2-3 Bundling a Root Certificate with the Installation Package for Darwin 2-4 Installing the VPN Client 2-4 Authentication 2-4 VPN Client Installation Process 2-6 Introduction 2-6 Accepting the License Agreement 2-7 Selecting the Application Destination 2-7 Choosing the Installation Type 2-8 CLI Version Install Script Notes 2-12 Uninstalling the VPN Client 2-12
CHAPT E R 3 Navigating the User Interface 3-1 VPN Client Menu 3-1 Choosing a Run Mode 3-2 Operating in Simple Mode 3-2 VPN Client Window Simple Mode 3-2 Main Menus Simple Mode 3-3 Connection Entries Menu 3-3 Status Menu 3-3 Operating in Advanced Mode 3-4 VPN Client Window Advanced Mode 3-4 Toolbar Action Buttons Advanced Mode 3-5 Main Tabs Advanced Mode 3-5 Main Menus Advanced Mode 3-6 Connection Entries Menu 3-6 Status Menu 3-7 Certificates Menu 3-7 Log Menu 3-8 Right-Click Menus 3-8 Connection Entries Tab Right-Click Menu 3-9 Certificates Tab Right-Click Menu 3-10 CHAPT E R 4 Configuring Connection Entries 4-1 Creating a Connection Entry 4-1 Authentication Methods 4-3 Group Authentication 4-3 Mutual Group Authentication 4-4 Certificate Authentication 4-4 Transport Parameters 4-6 Enable Transport Tunneling 4-7 Transparent Tunneling ModeProceedings of the Linux SymposiumThis paper will discuss the difficulties and methods involved in debugging the Linux kernel on huge clusters. Intermittent errors that occur once every few years are hard to debug and become a real problem when running across thousands of machines simultaneously. The more we scale clusters, the more reliability becomes critical. Many of the normal debugging luxuries like a serial console or physical access are unavailable. Instead, we need a new strategy for addressing thorny intermittent race conditions. This paper presents the case for a new set of tools that are critical to solve these problems and also very useful in a broader context. It then presents the design for one such tool created from a hybrid of a Google internal tool and the open source LTTng project. Real world case studies are included.
Well established techniques exist for debugging most Linux kernel problems; instrumentation is added, the error is reproduced, and this cycle is repeated until the problem can be identified and fixed. Good access to the machine via tools such as hardware debuggers (ITPs), VGA and serial consoles simplify this process significantly, reducing the number of iterations required. These techniques work well for problems that can be reproduced quickly and produce a clear error such as an oops or kernel panic. However, there are some types of problems that cannot be properly debugged in this fashion as they are:
• Not easily reproducible on demand;
• Only reproducible in a live production environment;
• Occur infrequently, particularly if they occur infrequently onFocusrite Saffire Getting Started Guide Manual1. Run the Installer from the Saffire resources disc. 2. During the installation process you will see the following message: The software you are installing has not passed the Windows Logo testing to verify its compatibility with Windows XP. Select Continue Anyway to proceed. 3. You will now be instructed to connect your Saffire to your PC using the 6 pin Firewire (IEEE 1394) cable. You can use either port 1 or 2. NOTE: Please use the firewire provided as other cables may not be compatible. If the computer/laptop only has a (smaller) 4-pin Firewire port then a different Firewire cable will be required; note that in this case, the external power supply will also be required, as 4-pin Firewire ports cannot supply power. The 4-pin Firewire cable is not included.
4. Once connected, the Saffire drivers and plugins will be installed automatically. Please be patient during this process. 5. Upon opening your sequencer you will need to authorise your Saffire Plugins * . 6. Once installation is complete, you may exit the installer. 7.You are now ready to run Saffire control. 8. The first time you run Saffire it may prompt you to update firmware. Ensure you have an internet connection and follow the on screen instructions. Mac OS X Installation 1. Connect your Saffire to your Mac using the 6 pin Firewire (IEEE 1394) cable. NOTE: Some early Powerbooks may still require the Saffire PSU to be used. (If the screen goes dark, then youSAP Free Tutorial: Translation Tools for Translators (BC-DOC-TTL) PDFThis topic gives you a quick overview of the functionality in transaction SE63. However, for a detailed explanation of the various functions, please refer to the individual topics. Working With SE63 You translate short texts and long texts in the respective editors within transaction SE63. To call up this transaction, either: • Enter /NSE63 in the command field in the initial screen of the R/3 System • Choose Tools ? ABAP/4 Workbench ? Utilities ? Translation ? Short/Long texts on the initial screen of the R/3 System. You can translate texts either: • By using a worklist • By calling up the objects directly.
Worklists Most objects requiring translation are assigned to development classes. When you create a worklist, you can include one or more development classes. All the objects belonging to the development classes you choose are then included in your worklist. To create a worklist, proceed as follows:
Download SAP Free Tutorial: Translation Tools for Translators (BC-DOC-TTL) PDFRenault All Types Service Manual PDFInstrument panel with or without trip computer 83 ALL TYPES except N engine Adjust the various instrument panel functions (clock, etc…) if necessary. Check that all the instrument panel functions operate correctly. AFTER REPAIR FAULT FINDING CHARTS no CHART 7 SPEEDOMETER PROBLEM (vehicles fitted with an electric speedometer). Needle vibrates or oscillates or no needle movement and total mileage recorder does not operate. Check that the system connectors are engaged correctly. Take care not to damage the connectors during checks.
NOTES yes Check that the speed sensor is connected and secured correctly. Is the speed sensor secured correctly? no Disconnect the speed sensor connector. Connect the XR25. Use the frequency generation function (key G, output terminal G). Connect the frequency generator wire to the “vehicle speed” input of the connector (connector wiring end). With the ignition on, enter on the XR25 : - the speedometer should indicate ~ 36 km/h. - the speedometer should indicate ~ 108 km/h. - the speedometer should indicate ~ 180 km/h. Does the speedometer needle indicate these values without vibrating or oscillating? G 1 G 3 G 5 yes Change the speedometer or the instrument panel depending on instrument panel model. Check the condition of the electrical wiring between the speed sensor and the “vehicle speed” input on the instrument panel. Is the electrical wiring in good condition? yes Change the speed sensor. no Repair the electrical wiring between the instrument panel and the speed sensor. Secure the speed sensor correctly.
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