Difficult to Categorize

Primary progressive apraxia: a syndrome difficult to categorize.

1Outpatient clinic for Memory and Behavior Disorders (ADEMEC), Instituto de Neurologia de Curitiba (INC), Curitiba PR, Brazil; 2ADEMEC, INC, Curitiba PR, Brazil; 3INC, Curitiba PR, Brazil; 4Center of Computed Tomography (CETAC), INC, Curitiba PR, Brazil. Correspondece: Ricardo Krause Martinez de Souza; Instituto de Neurologia de Curitiba; Rua Jeremias Maciel Perretto 300; 81210-310 Curitiba PR ...

Continuous Variables: to Categorize or to Model?

Continuous variables are often encountered in life. We measure age, blood pressure and many other things. In medicine, such measurements are often used to assess risk or prognosis or to select a therapy. However, the question of how best to use information from continuous variables is relevant in many areas. To relate an outcome variable to a single continuous variable, a suitable regression mo...

Prevention of Iodine Deficiency: Difficult to Implement, More Difficult to Sustain

Exploring Children’s Ability to Categorize and Symbolize

Cartographers categorize the features to be mapped according to their dimensions (i.e. point, linear, area) and according to their qualitative and quantitative inherent characteristics. This classification is crucial for the selection of the symbols. But are cartographers aware of the way children conceptualize the geographical space? Do cartographers know the way children categorize things (it...

Learning to Categorize Objects Using Temporal Coherence

The invariance of an objects' identity as it transformed over time provides a powerful cue for perceptual learning. We present an unsupervised learning procedure which maximizes the mutual information between the representations adopted by a feed-forward network at consecutive time steps. We demonstrate that the network can learn, entirely unsupervised, to classify an ensemble of several patter...