In this thesis. we investigated the use of visual information in intercepting moving objects.
We have tried to determine which sources of visual information are used in guiding different
aspects of the intercepting action.
There are many interception tasks that each have their own kind of action and their
own potentially useful visual infonnation. For example. in catching balls you may have to
run. whereas that is generally not necessary in hitting running spiders. The fact that the
object that you want to intercept 'gets bigger' as it approaches you might be a useful source
of information in catching balls. In contrast. this information is less useful in hitting spiders
that run across a walL as their movement direction is not mainly towards your eyes. We thus
looked at different tasks. which implied different kinds of action and different kinds of
valuable information.
An important aspect that all interception tasks have in common. is that one has to
anticipate the movement of the target during one's own planning and moving. It is not
possible to successfully intercept a moving target by determining the target's position and
subsequently moving there. because by the time you arrive at the determined position. the
target has already moved to somewhere else. It is poorly understood how this problem is
solved.
Publication date
01/01/2002
Field of study
In this thesis. we investigated the use of visual information in intercepting moving objects.
We have tried to determine which sources of visual information are used in guiding different
aspects of the intercepting action.
There are many interception tasks that each have their own kind of action and their
own potentially useful visual infonnation. For example. in catching balls you may have to
run. whereas that is generally not necessary in hitting running spiders. The fact that the
object that you want to intercept 'gets bigger' as it approaches you might be a useful source
of information in catching balls. In contrast. this information is less useful in hitting spiders
that run across a walL as their movement direction is not mainly towards your eyes. We thus
looked at different tasks. which implied different kinds of action and different kinds of
valuable information.
An important aspect that all interception tasks have in common. is that one has to
anticipate the movement of the target during one's own planning and moving. It is not
possible to successfully intercept a moving target by determining the target's position and
subsequently moving there. because by the time you arrive at the determined position. the
target has already moved to somewhere else. It is poorly understood how this problem is
solved
Two fluorescent derivatives of 2-amino-3-carbonitrile-4H-chromene were synthesized by means of a fluorogenic Michael addition of dimedone to dicyano alkene labeled BODIPY derivatives. Different organocatalysts were used in different conditions to obtain compounds 3 and 4 in good yield (up to 65% and 85 and moderate enantiomeric excess (51% and 41% ee, respectively). This work provides the first example of an enantioselective organocatalytic conversion combined with fluorogenesis