Using Moodle to build e-learning website

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Ảnh trường Bách Khoa

C1 Building

Water Park

Electronic Library

Posted in Relax. 3 Comments »

Enabling Compiz Fusion On A Fedora 8 GNOME Desktop

Compiz

This tutorial shows how you can enable Compiz Fusion on a Fedora 8 GNOME desktop (the system must have a 3D-capable graphics card – I’m using an ATI Mobility Radeon 9200 here). With Compiz Fusion you can use beautiful 3D effects like wobbly windows or a desktop cube on your desktop.

This document comes without warranty of any kind! I do not issue any guarantee that this will work for you!

Link : http://www.howtoforge.com/compiz-fusion-fedora8-ati-mobility-radeon-9200

Keyboard Shortcuts

Here’s a list of the most common Compiz Fusion keyboard shortcuts:

SUPER+SHIFT+DRAG LEFT MOUSE = draw fire
SUPER+SHIFT+C = clear fire
CTRL+ALT+DRAG LEFT MOUSE = rotate cube
CTRL+ALT+LEFT ARROW = rotate cube
CTRL+ALT+DOWN ARROW = flat desktop
SHIFT+ALT+UP = initiate window picker
CTRL+ALT+DOWN = unfold cube
ALT+TAB = window switch
SUPER+TAB = flip switcher or ring switcher, depending on which is enabled.
ALT+F7 = initiate ‘move windows’
SHIFT+F9 = water effect
SHIFT+F10 = slow animations
CTRL+ALT+D = show desktop

For Grouping and Tabbing:
SUPER+S = select single window
SUPER+T = tab group
SUPER+Left = change left tab
SUPER+Right = change right tab
SUPER+G = group windows
SUPER+U = ungroup windows
SUPER+R = remove group window
SUPER+C = close group
SUPER+X = ignore group
Hold the SUPER button then select the windows you want to group and then hit SUPER+G.

The SUPER key is the Windows key on most keyboards.

We need a feature list and how to use Compiz including key combination

* Rotate – [Control] +[Alt] +Right Arrow Key or Left Arrow Key
* 3D Cube – [Control] +[Alt] +Left Mouse Click then Drag the mouse
* Scale – Move mouse to Top Right Corner or press [Pause] key. Press [Esc] key to go back.
* Zoom – [Super/Windows] + Right Mouse Click

Posted in FOSS. Tags: . 1 Comment »

Dawn of a new Century.mp3

Dawn of a new Century.mp3 in Secret Garden

Chương trình mô phỏng các cổng logic

Chương trình viết bằng java, nhỏ gọn minh họa các cổng logic (not, and, or..) khi được nối với đèn LED.
Chạy online
Download chương trình nguồn

System Requirements

Simcir requires a browser or Java Runtime Environment that support Java1.1.
Successfully tested on following environment.

* Sun JDK/JRE 1.1.7, 1.2.1
* Netscape Communicator 4.08, 4.5
* Microsoft Internet Explorer 4.01 SP1, 5.0

Usage

1. Choice a device from the toolbox and move to right side.
2. Connect them by drag operation.
3. Click a input node to disconnect.
4. Move a device back to the toolbox if you don’t use.
5. Double click the label to edit.

Note

* To simplify the model, all devices transfer only voltage but current.
* Please don’t make infinity loop like a vibrator. 🙂
* When logic gate’s input node is not connected, it treated as pulled down.

Link : http://www.d-project.com/simcir/

Simcir the circuit simulator

Shortcut Keys in Linux

Global shortcut keys
Global shortcut keys enable you to use the keyboard to perform tasks related to your desktop, rather than tasks on the currently selected window or application. The following table lists some global shortcut keys:
Shortcut Key Function
Alt+F1 Open the Applications Menu.
Alt+F2 Display the Run Application dialog. See Section 7.1 ― Running Applications for more information.
Print Screen Take a screenshot of the entire desktop. See Section 7.2 ― Taking Screenshots for more information.
Alt+Print Screen Take a screenshot of the currently focused window.
Ctrl+Alt+Arrow keys Switch to the workspace to the specified direction of the current workspace. See Section 2.4 ― Workspaces for more information on working with multiple workspaces.
Ctrl+Alt+D Minimize all windows and give focus to the desktop.
Alt+Tab Switch between windows. A list of windows that you can select is displayed. Release the keys to select a window. You can press the Shift key to cycle through the windows in reverse order.
Ctrl+Alt+Tab Switch the focus between the panels and the desktop. A list of items that you can select is displayed. Release the keys to select an item. You can press the Shift key to cycle through the items in reverse order.

Application Keys
Application shortcut keys enable you to perform application tasks. You can use shortcut keys to perform application tasks more quickly than if you use a mouse. The following table lists some common application shortcut keys:
Shortcut Key Action
Ctrl+N Create a new document or window.
Ctrl+X Cut the selected text or region and place it on the clipboard.
Ctrl+C Copy the selected text or region onto the clipboard.
Ctrl+V Paste the contents of the clipboard.
Ctrl+Z Undo the last action.
Ctrl+S Save the current document to disk.
F1 Load the online help document for the application.

In addition to these shortcut keys, all applications support a set of keys to navigate and work with the user interface. These keys allow you to perform operations that you might normally perform with a mouse. The following table describes some interface control keys:
Keys Action
Arrow keys or Tab Move between controls in the interface or items in a list.
Enter or spacebar Activate or choose the selected item.
F10 Activate the left-most menu of the application window.
Shift+F10 Activate the context menu for the selected item.
Esc Close a menu without selecting a menu item, or cancel a drag operation.

Window shortcut keys
Window shortcut keys allow you to use the keyboard to perform tasks on the currently focused window. The following table lists some window shortcut keys:
Shortcut Key Function
Alt+Tab Switch between windows. A list of windows that you can select is displayed. Release the keys to select a window. You can press the Shift key to cycle through the windows in reverse order.
Alt+F4 Close the currently focused window.
Alt+F5 Unmaximize the current window, if it is maximized.
Alt+F7 Move the currently focused window. After pressing this shortcut, you can move the window using either the mouse or the arrow keys. To finish the move, click the mouse or press any key on the keyboard.
Alt+F8 Resize the currently focused window. After pressing this shortcut, you can resize the window using either the mouse or the arrow keys. To finish the resize, click the mouse or press any key on the keyboard.
Alt+F9 Minimize the current window.
Alt+F10 Maximize the current window.
Alt+spacebar Open the window menu for the currently selected window. The window menu allows you to perform actions on the window, such as minimizing, moving between workspaces, and closing.
Shift+Ctrl+Alt+Arrow keys Move the current window to another workspace in the specified direction. See Section 2.4 ― Workspaces for more information on working with multiple workspaces.