KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Lumyong, ChayaninHas files: No

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Skin Video-based Blood Pressure Approximation Using CHROM with LSTM-NN
    (2023-01-01)
    Lumyong, Chayanin
    ;
    Yodrabum, Nutcha
    ;
    Winaikosol, Kengkart
    ;
    Titijaroonroj, Taravichet
    The measurement of blood pressure (BP) is an essential step in clinical practice. It is used to determine the patient's BP, which reflects the condition of the patient. Recently, there is a solution for extracting, non-invasively and with no contact, a blood pressure indicator from electrical signal like Photoplethysmography (PPG), called remote-Photoplethysmography (rPPG). This rPPG signal can be used to estimate from a video clip several vital physiological indicators for humans, especially, systolic blood pressure (SBP), diastolic blood pressure (DBP), and mean arterial pressure (MAP). This paper proposed a computer method for blood pressure approximation from an input video. A chrominance method, or CHROM, was used to extract rPPG signal from a given video before forwarding it to estimate SBP and DBP values by LSTM-NN. Afterwards, MAP value was determined from SBP and DBP values by a weighting score technique. Experimental results showed that CHROM achieved the lowest mean absolute error (MAE) at 14.04, 8.37, and 9.78 for the SBP, DBP, and MAP, respectively, when compared among NN, RNN, and GRU.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Proposed Structural Validation-based Testing for Object-Oriented Programming
    (2021-01-21)
    Lumyong, Chayanin
    ;
    Tachasriburapha, Natthawut
    ;
    Titijaroonroj, Taravichet
    Nowadays, Java program testing is widely used in an academic e-learning system. It can help a lecturer to give feedback and suggestion to learners automatically and immediately. Especially, an object-oriented programming (OOP) class should have a system to support learners. It is difficult and labor-intensive, if there are many learners. The test case-based approach is widely used in programming testing, because they are simple and convenient. This approach requires input-output pairs to evaluate the submitted code by comparing the output from their code with the expected output. However, it considers the output only, thus making it not appropriate for an OOP class. To develop the Java program testing to support an OOP class, a proposed structural validation-based testing (PSVT) is proposed. The experiments showed that our method can evaluate the correctness and the relation validity of the given code which is corresponding to the human. Moreover, its complexity is O(N^{2}).