[Grey-Walter] [info] [Fwd: Hertfordshire Colloquium - Categorization/Neural Networks (27 Nov, 4 pm, Hatfield Campus)]

[xabier at sindominio.net]

estoy en el la lista de correo de vida artificial de la universidad de
sussex y de vez en cuando me mandan cosas que pueden ser de interes. Hasta
ahora he estado mandando algunas cosas a nuestra lista, pero no sé si os
parece spam o interesa. desde becas hasta charlas de inteligencia y vida
artificial me pasa de todo por esa lista. yo creo que es interesante saber
qué se está haciendo en las últimas investigaciones y aunque muchos
forward que mando son de charlas a las que evidentemente no vamos a ir
sigo creyendo que pueden ser interesantes. vosotros diréis si os parece
bien que las reenvie a la lista.

un saludo,

xabier

-------- Mensaje Original --------
Asunto: Hertfordshire Colloquium - Categorization/Neural Networks (27 Nov,
4 pm, Hatfield Campus)
De: Chrystopher Nehaniv <C.L.Nehaniv at herts.ac.uk>
Fecha: Lun, 25 de Noviembre de 2002, 11:53 am
Para: alergic_list at cogs.susx.ac.uk






       UNIVERSITY OF HERTFORDSHIRE

    COMPUTER SCIENCE RESEARCH COLLOQUIUM


                presents


   "Categorisation and the testing of categories:
            A neural computing approach"

                speaker:


           Dr. Khurshid Ahmad,
         Department of Computing,
        University of Surrey, U.K.



        27 November 2002 (Wednesday)

          Lecture Theatre E351
            Hatfield Campus
                4 - 5 pm

       **NOTE STARTING TIME: 4 PM**


 Coffee/tea and biscuits will be available.


        Everyone is Welcome to Attend
            [Space Permitting]


Abstract:

The creation of categories interests computing scientists
theoretically and experimentally.  Indeed, this vocation
is much beloved of philosophers, biologists, linguists and
kindred folk.  Once the categories are created then
various tests are administered to the output to ascertain
the goodness of the hypothesis used to create the categories
in the first place.  Neural computing systems, supervised and
unsupervised, are used to create categories for a range of
input data.  In this talk, I will discuss a new use of
unsupervised neural networks for categorising news reports.
We use the so-called self-organising feature maps for creating
categories into which each of a set of the news stories can
be categorised; the maps were created using the Surrey
Artificial Neural Network System (SANNC).  The effectiveness
of the categories is evaluated using a statistical test.  The
program created categories appear to overlap well with the
categories of a human categoriser (sub-editor).  The category
map is then used to test the effectiveness of a news
summarisation program.  The summary of all news items in the
training set is produced by one of our program SummariserPort,
and its representative vector categorised by the neural
network trained on a set of full texts.  Each summary input
is then allocated a category by SANNC: if the summary occupies
the same space on the map as its source full text then one
can argue that the summary was an accurate in so far as it
was given the same category.  Typically, a human expert tests
the output of a summariser; the test may sometimes have
subjectivity that characterises almost all human evaluation.
The use of a category map, produced by a neural computing
program, in my opinion, reduces the bias.

--
Hertfordshire Computer Science Research Colloquium Abstracts
On-line: http://homepages.feis.herts.ac.uk/~nehaniv/colloq/


"there is no need for fear or hope, but just to look for new weapons"
Gilles Deleuze
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xabier barandiaran      www.sindominio.net/~xabier
Metabolik BioHacklab  www.sindominio.net/metabolik
Grey-walter             grey-walter at sindominio.net
==================================================
         ::: www.sindominio.net :::
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"there is no need for fear or hope, but just to look for new weapons"
Gilles Deleuze
==================================================
    Debian gnu/linux woody :: kernel 2.4.18
==================================================
xabier barandiaran      www.sindominio.net/~xabier
Metabolik BioHacklab  www.sindominio.net/metabolik
Grey-walter             grey-walter at sindominio.net
==================================================
         ::: www.sindominio.net :::
==================================================