4.4 PRINTING SCREENS   If at any time the user wishes to print a screen, pressing the CNTL and PRT SCR keys on the keyboard at the same time will select the [Print Screen Menu]. The Print Screen offers the following options:

	Print - will print the image displayed on the color monitor. The printout will be directed to the graphics printer designated in Figure 4-6.
	Save - will save a screen to a .PCX file. The file will be saved in the current directory. with the .PCX extension being added automatically.
	Restore - will retrieve a .PCX file from the current directory that has been previously stored.
	Mode - allows .PCX files to be combined or manipulated. The current mode is shown in the upper right corner of the menu box.
	Text - transfers the text on the monochrome monitor to the color monitor to be printed. The Print option is then selected to print the text on the color monitor screen.
	Quit - simply returns to the previous screen.

4.5 MAIN APAS MENU   After the system boot and APAS/CES is selected, the Main APAS Menu will appear. This is a pull down menu listing the various programs and options available. Selection may be made through use of either the mouse pointer or the cursor arrow keys and striking ENTER or by selecting the underlined letter. Some options shown in the diagrams may not be visible due to your particular configuration.

The Exit selection from this window will take the user to the Disk Operating System (DOS).

4.5.1 APAS   The APAS Menu lists the modules that comprise the Ariel Performance Analysis System. The modules are arranged in the order that they would generally be used when performing a new analysis.

The following chapters describing each of the individual modules will begin by accessing the particular module from this window.

4.5.2 OneMon   The OneMon menu allows the user to select Ariel Performance Analysis System modules in a one monitor mode. APAS modules selected under this option do not require use of the monochrome monitor. The menu screen that is displayed on the monochrome monitor in the two monitor mode can be accessed in the one monitor mode by pressing the INSERT key on the keyboard. Menu selections using the One Monitor mode are identical to the two monitor mode, however, the appearance of menus may vary slightly.

4.5.3 Application   Under the Application Menu is a listing of the special Ariel programs. These are specialty programs and are designed as aids to the APAS analysis.

4.5.3.1 DELTA   The Dynamic Ergonomic Lift Task Analysis (DELTA) program is a special application program developed around the basic APAS for movement analysis.

The DELTA program is based upon the lifting model presented in Don Chafin's text, Occupational Biomechanics. This model is concerned with the biomechanical and static strength capabilities of the employee in relation to the physical demands of the work environment. Ariel has added to this model the inertial effects of load to help provide more accurate results in the DELTA program. This program was designed to help the analyst in the evaluation of the physical demands of a prescribed job and to evaluate proposed workplace designs in order to implement the necessary changes prior to the construction of that work station. The information derived from the analysis is useful for job design and as an evaluation tool for instructional purposes. Since the information is collected in two dimensions, it is applicable only to the worker's movement in the sagital plane.

The DELTA program is an optional program and is not installed with every APAS system. This program is discussed further in Chapter 15, DELTA - Dynamic Ergonomic Lift Task Analysis.

4.5.3.2 Gait   The Gait program was created with the intention of providing kinematic and timing characteristics of sagital gait movement. It also serves as a general instructional tool on improving gait movement. The program provides the ability to easily compare results with a specified data base. The special characteristics of the Gait program gives the orthopedic surgeon and the clinician the capacity to see how a patient is rehabilitating or recovering from surgery.

The Gait program is an optional program and is not installed with every APAS system. This program is discussed further in Chapter 16, The Gait Program.

4.5.3.3 RPI2D   The Redundant Point Interpolation 2-Dimensional (RPI2D) program is used in conjunction with the Gait program. It is based on the fact that in 2-dimensions you can define any segment with three points. By knowing the relationship of each of the three points to the other two, if any one point is not visible, the location of the missing point can be computed from the known location of the remaining two points. For example, in a sagital gait analysis, the thigh can be defined by one point on hip, one point on the knee joint and a third point on the posterior surface of the thigh (somewhere between the first two points). When the hip joint is blocked by the swinging arm, the location is "estimated" while digitizing. The RPI2D program is then used on the digitized image to compute the exact location of the "estimated" points. This has been shown to significantly increase digitizing accuracy.

4.5.3.4 Anthro   The Anthro program is a calculation module using formulas based on abstracts of various investigations. This module calculates values of segmental mass, location of center-of-mass (CM), and principal moments of intertia with respect to the CM.

4.5.4 System   Programs dealing with global system parameters are filed under the Systems menu.

4.5.4.1 Printers   When the Printers option is chosen the Printer Option Screen shows the type of printer that has been selected. The first six fields pertain to the graphics printer. The "Text_Type" field is used to select the text printer. The APAS is compatible with a multitude of different printers.

The APAS supports 2 line printer ports (LPT1 & LPT2). By default, the color graphic printouts are routed to LPT2 by the "CTRL" & "PRT SCRN" command. Table and numerical data are routed to LPT1.

4.5.4.2 Setup   The Setup Information menu is used to set global parameters for use by the APAS. These parameters are set prior to delivery of the system. The default force plate file can be selected for use in the Analog module. Resolution can be set to the user's preference. The VCR type should be selected to correspond to the VCR used with your particular system. NOTE: The Panasonic AG-7150 and AG-7350 use the same PAN7350 setting.

4.5.5 Util1   This is the system Utilities 1 menu (Figure 4-8). This menu provides programs for manipulation of files, general disk maintenance and other various programs.

	View_Files - Selects file maintenance programs.
	Tape_backup - Selects the optional tape backup software.
	Modem - Selects the optional modem software.
	Dos_shell - Selects MS Dos shell.
	VRG_On/VRG_Off - Used to toggle the optional Video Report Generator software On and Off.
	Lotus-123 - Selects Lotus 123
	Smooth_Test - Optional smoothing software.
	Paint - Selects optional graphics software.
	Convert - ShareWare program for unit conversion.

4.5.6 Util2   The Utilities 2 menu provides interface with other 3rd party programs. These may be installed at the time of purchase or the user may purchase and install the programs themselves.

4.5.7 Windows   The Windows selection allows the user to run Microsoft Windows 3.11 operating environment.

4.6 HELP SCREENS   The Help Screens are accessed by pressing the SHIFT & QUESTION MARK (?) keys within any of the APAS modules. The Help screen offers a more detailed description of an items on the currently displayed menu. The Help Screen will overlay the current menu and will explain the menu items. Different menu items help screens are accessed using the left/right arrow keys. The help screen may be removed by pressing the ESC key.