[[http://cadia.ru.is/wiki/public:t-720-atai:atai-16:main|T-720-ATAI-2016 Main]]

=====T-720-ATAI-2016=====
====Lecture Notes, F-2	15.01.2016====
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====Task-Environments: Key Concepts====

|  Task  | A Problem that can be assigned. Typically comes with Instructions (guide to Solutions).  |
|  Problem  | A Goal with (all) relevant constraints (≈ requirements).  |
|  Problem Family |  A set of problems that are similar in some (important) ways; a Problem plus variations of that Problem.  |
|  Goal  | A (future) State to be attained, plus optional constraints on the Goal.  |
|  State  | A set of values (with error bounds) for a set of variables relevant to a Goal.  |
|  Environment  | A set of constraints relevant to a Task but not counted as part of a Task proper.   |
|  World  | A set of constraints that a set of Environments have in common.  |
|  Constraint  | A set of factors that limit the flexibility of that which it constrains.  |
|  Solution  | The set of (atomic) actions that can achieve a Goal.  |
|  Action  | The changes an Agent can make to variables relevant to a Task-Environment.  |
|  Plan  | A partial way to accomplish a Task.   |
|  Instructions  | Partial Plan for accomplishing a Task, typically given to an Agent along with a Task by a Teacher.  |
|  Teacher  | The Agent assigning a Task to another Agent (student), optionally in charge of Instructions.  |

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====Task-Environment Constraints====

|  Solution Constraint  | Reduces the flexibility for producing a Solution.   |
|  Task Constraint  | Limits the allowed Solution Space for a Problem. Can help or hinder a Task to be achieved.   |
|  Solution Space  | The amount of variation allowed on a State while still counting as a Solution to a Problem.  |
|  Task Space  | The size of variations on a Task that would have be explored with no up-front knowledge or information about the Solution Space of a Problem.  |

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====Limited Time & Energy====

| Task | All tasks have a limited time & energy: No Task exists that can be performed with infinite energy, or for for which infinite time is available for achieving.  |
|  LTE  | Limited Time & Energy.  |

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====Problems in Task-Environments====

|  Closed Problem  | May be assigned as a Task with known Time & Energy for achieving a solution.  |
|  Example  | Doing the dishes.  |
|  Plans for Closed problems | Can be reliably produced for closed problems, e.g. in the form of Instructions.  |
|  Open Problem  | A Problem whose solution is unknown and cannot be obviously assumed from analogy with similar problems whose solution is known. Cannot be guaranteed a solution with LTE.  |
|  Example  | Any research problem for which no known solution exists.  |
|  Plans for Open problems | Cannot be reliably produced.   | 


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2016(c)K. R. Thórisson 
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