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HydReclaim Blender Control

HydReclaim Blender Control
Program developed in 1998 in cooperation with John L. Sullivan (instructional design), Applied Performance Technology, PA for  S&L Plastics, Inc Nazareth, PA
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Introduction

Blender simulator & Instructor panelProject presents a new CBT technology that combines advantages of real time simulation with up to date learning techniques, based on the different learning models.

Developed program introduces a successful realization of simulation not only for the object of  training (Control Panel), but also for the subject (trainer or operator) and object (Control Panel) interaction, that creates an unique learning environment. Training program has two basic components:

- Control Panel simulator (at the top of the figure) and
- Virtual Instructor (at the bottom)

Real-time Control Panel simulation
Blender SimulationReal-time engine of simulator controlled several dozens of internal dynamic parameters (variables) and displayed Blender state in the special popup box with animated scheme (figure at the left) and on the control panel display. The reaction of simulator to different actions of operator was identical to that of actual device. This enables us to situate the learning in almost authentic context.

Engine used a  mathematical model of real microprocessor controlled equipment and every 100 ms recalculated internal parameters, simulating a dozen different elements and units of the real device, including hoppers, valves, flow and level meters. For fine tuning of such dynamical system we used special configuration file with a hundred of static device parameters .

Operator had full access to the controls placed on the Blender Control Panel (top figure). Thus simulation presented traditional training environment where learner observed the reaction of the object to his actions (see figure below).

Virtual Instructor

Virtual InstructorVirtual Instructor performed at the next level of system end enabled us to simulate the behavior of operator in  real time. Mentioned HydReclaim Blender simulator processed commands from Learner or Virtual Instructor. Several modes of learning, based on different learning approaches, were employed.

Virtual Instructor had four base modes of operation:

- Let me try (the default)
- Show me
- Guide me
- Test me

1. Let me try
"Let me try" modeIn this mode, the learner was free to construct his own knowledge about the control panel through discovery and exploration. This modes presented a traditional training environment with the use of real-time simulation.
2. Show me
"Show me" modeMode "Show me", presented a more passive learning approach, closer to a more traditional objectivist styles of learning. In this mode Virtual Instructor used a special animated hand like cursor, performed different commands, pressing buttons on the control panel and providing learner with audio and text comments. There user had no access to the control panel at all, so simulator processed commands generated by Virtual Instructor.
3. Guide me
"Giide me" modeA more cognitive approach was used in the "Guide me" mode where the learner was guided and prompted to perform certain actions on the control panel. Instructor tested learner actions and the reaction of Blender simulator, providing negative feedback in the case of errors. In this mode Instructor played a passive role, following operator and presenting him local objectives of the current lesson. Instructor was able to recognize multiple commands sequences, that led to the same Blenders status.

Instructor and Blender simulator were developed in such way, that the learner could always cancel the last executed command with special undo button.

4. Test me
"Test me" modeThis mode was similar to the "guide me", but all errors performed by the leaner were fatal and led to the negative record in the session log file. Virtual Instructor had a standard set of features for CBT programs for registering users, printing reports and certificates.
Learning environment
Learning objectives were included for each lesson, however, unlike traditional objectivist learning environments, the learner was not forced to review the objectives. Also, in accordance with constructivist learning theory, the learner had total freedom to choose whichever lessons he wanted to review, in any order. Like behaviorist programs, the learner was reinforced for learning the correct sequence of operations and encouraged to try again when the sequence was not correct. To ensure that learning did take place, a test was available to be taken at any time the learning felt confident in his ability. The test could be taken as many times as required to pass and at any point during the simulation.
Instructional design
To increase the efficiency of the instructional design we developed a special meta language. Interpreting program written in this language Instructor performed different actions, generating commands, playing clips and displaying comments. Thus, the instructional design was performed in the natural for the human instructor manner.

     
   

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