Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Machine Learning-based Classification of Active Walking Tasks in Older
  Adults using fNIRS   Decline in gait features is common in older adults and an indicator of
disability and mortality. Cortical control of gait, specifically in the
pre-frontal cortex as measured by functional near infrared spectroscopy
(fNIRS), during dual task walking has shown to be moderated by age, gender,
cognitive status, and various age-related disease conditions. In this study, we
develop classification models using machine learning methods to classify active
walking tasks in older adults based on fNIRS signals into either
Single-Task-Walk (STW) or Dual-Task-Walk (DTW) conditions. In this study, we
develop classification models using machine learning methods to classify active
walking tasks in older adults based on fNIRS signals into either single-task
walking (STW) or dual-task walking (DTW). The fNIRS measurements included
oxyhemoglobin (HbO2) and deoxyhemoglobin (Hb) signals obtained from prefrontal
cortex (PFC) of the subject performing on the ground active walking tasks with
or without a secondary cognitive task. We extract the fNIRS-related features by
calculating the minimum, maximum, mean, skewness and kurtosis values of Hb and
Hbo2 signals. We then use feature encoding to map the values into binary space.
Using these features, we apply and evaluate various machine learning methods
including logistic regression (LR), decision tree (DT), support vector machine
(SVM), k-nearest neighbors (kNN), multilayer perceptron (MLP), and Random
Forest (RF). Results showed that the machine learning models can achieve around
97\% classification accuracy.

31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph