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# 电子代写|虚拟现实代写Virtual Reality代考|DECO3009 Cognitive Software Aids

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## 电子代写|虚拟现实代写Virtual Reality代考|Cognitive Software Aids

The Cognitive Software Aids for motoricity and perception, associated with the VBPs, help the subject in completing a task. The CogSA can focus either on helping to solve the sensorimotor discrepancies or on helping the user to complete a task by detecting his intention. The following examples illustrate the first case:

• As mentioned earlier, it is possible to add specific constraints while handling an object using a 6 DOF sensor and without force feedback, leading to sensorimotor discrepancies when the object collides with another object. The movements of the virtual object are restricted to help the user obtain the desired motoricity. For example, the object’s supporting surface becomes parallel to the table surface when they are close to each other. These unreal constraints are called virtual guides (for movement) or the effects of magnetism;
• For fixed transport simulators having sensorimotor discrepancies between vision and kinaesthesia, the INRETS (Institut National de Recherche et d’Etudes des Transports et de la Sécurité or National Institute of Research and Studies on Transport and Safety) recommends setting up a higher force feedback on the simulator’s steering wheel compared to the feedback received in a real vehicle. In this way, the inexperienced drivers using the simulator have a greater perception of the vehicle’s on-road behaviour though their vestibular systems have no knowledge about the vehicle movements. In this case, it is obvious that at the level of functional $\mathrm{I}^2$ the force feedback does not need to be exactly like the feedback in the real world. The $\operatorname{Cog} S \mathrm{~A}$ used helps every inexperienced driver using the simulator to control the vehicle.

In the second case, it is necessary to detect the intention of the subject who is trying to accomplish a task, for example:

• In a VR-based training system for the members of the driving crew of TGV (we will discuss this later at length), the user has to go near a telephone pole to pick up the receiver. Considering the interfaces used (big screen, moving walkway and handle bar), it is difficult for the driver to move as easily as he walks in a real environment (without BSAs, he might desperately go round the pole several times while controlling the handle bar). CogSA has been programmed to make this task easier: once the pole comes close and the driver’s intention becomes clear, he automatically starts facing the pole. This is in line with the objective of functional $\mathrm{I}^2$ because the training is not for moving in a virtual environment! Determining the intention of the immersed subject(s) is an important issue of research in the field of VR, which should eventually make it possible to find efficient cognitive software aids.

## 电子代写|虚拟现实代写Virtual Reality代考|Design approach

For designing a virtual reality system, we will assume that it is preferable to reach the level of the user’s sensorimotor intelligence to help his $\mathrm{I}^2$ in the virtual world, rather than calling for his level of semiotic intelligence. Therefore for a required VBP, in principle we prefer using an Imported Behavioural Schema with its corresponding artefact if the interfacing is more effective in psychological, technical and economic terms, rather than using a metaphor. After analysing the interfacing and the associated model that we just explained, we propose the following chronological approach for designing using the VR techniques:

First we very strictly specify the functional $\mathrm{I}^2$ for the application (a long and tricky stage in many cases). Then we determine the useful VBPs on the basis of the desired functional $\mathrm{I}^2$. Then at the level of cognitive $\mathrm{I}^2$, we search for, either offhand or on the basis of the earlier experiments in virtual reality, the Imported Behavioural Schema(s) that are likely to give an effective immersion and interaction for each of these VBPs. If it is impossible to find IBS that are efficient and technically feasible at an affordable price, we select a suitable metaphor with or without sensory or motor substitution, compatible with the functional I ${ }^2$. Then we simultaneously determine the sensorimotor $\mathrm{I}^2$, the senses and (or) motor responses as well as the artefact of the behavioural interface, associated to the selected cognitive process. The metrological characteristics of the hardware interfaces must be compatible with the psychophysical characteristics of senses and motor responses in relation to the required sensorimotor $\mathrm{I}^2$. Then the Behavioural Software Aids will be designed to improve the cognitive and sensorimotor $\mathrm{I}^2$. Do not forget the design of BSAs (SMSAs and CogSAs) that we studied specifically. They are very effective and often indispensable to help the subject in immersion and interaction. They disturb the “perception, cognition, action” loop of the subject and almost always impose sensorimotor discrepancies. The BSAs can help the subject’s brain to accept these discrepancies. And only then can you program a VR software package, not before!
Chronological summary of the design approach:

• Step 1: Determination of functional $\mathrm{I}^2$;
• Step 2: Determination of the necessary VBPs on the basis of the functional $\mathrm{I}^2$;
• Step 3: Designing the Behavioural Interfaces on the basis of the VBPs (IBS, metaphors with or without substitution, artefacts, stimulated senses and motor responses);
• Step 4: Designing the BSAs based on the BIs;
• Step 5: Designing the VR software (programming the BSAs, drivers of BIs and modelling the virtual environment). Designing the software is an important part and takes a long time, especially for modelling the virtual environment. But this does not mean that you can neglect or even delete the previous steps!

## 电子代写|虚拟现实代写Virtual Reality代考|设计方法

• $\mathrm{I}^2$
• 步骤2:在泛函的基础上确定必要的VBPs $\mathrm{I}^2$
• 步骤5:设计VR软件(bsa编程、BIs驱动程序和虚拟环境建模)。软件设计是软件开发的重要组成部分，耗时较长，特别是对虚拟环境的建模。但这并不意味着您可以忽略甚至删除前面的步骤!

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