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    Wyświetlanie 1-3 z 3
    Tytuł:
    Skin Bridge versus Rod Colostomy in Children – Comparison between Complications
    Autorzy:
    Askarpour, Shahnam
    Peyvasteh, Mehran
    Changai, Bahram
    Javaherizadeh, Hazhir
    Powiązania:
    https://bibliotekanauki.pl/articles/1396847.pdf
    Data publikacji:
    2012-12-01
    Wydawca:
    Index Copernicus International
    Tematy:
    colostomy
    Hirschsprung
    imperforate anus
    prolapse
    sigmoid colostomy
    skin bridge
    Opis:
    Due to economic problems, sigmoid loop colostomy using glass rod may cause problems for our patients for finding glass rod and several visits. The aim of the study was to compare rod versus skin bridge colostomy. Material and methods. In this study, 42 cases who are candidate for colostomy were included. Cases were randomly placed in skin bridge and rod colostomy group. Independent sample t-test and Chi-square were used for comparison. SPSS version 16.0 (SPSS Inc, Chicago, IL, USA) was used for analysis. Results. Of 42 cases, 20 were male and 22 were female. Hirschsprung’s disease was the indication of colostomy in 33 cases. In nine cases, imperforate anus was the indication of colostomy. Mean time of surgery was 79.4 and 82.5 minute for the rod and skin bridge group respectively (P>0.05). Retraction was seen in 2 case of rod group, and no case of skin bridge group. Prolapse was seen in 2 (9.5%) case of rod group and 1(4.7%) case in skin bridge. There were no reports of necrosis, stenosis, and hernia in both groups. Conclusion. In the skin bridge group the rates of complications were lower but the groups are too small for statistical analysis. Colostomy with a skin bridge method may decrease number of revision and expenses and may be appropriate option. Sigmoid loop colostomy using skin bridge flap may be appropriate choice in developing country. Another study with more samples is recommended to better comparison of Skin Bridge versus rod colostomy.
    Źródło:
    Polish Journal of Surgery; 2012, 84, 10; 485-487
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hardware implementation of hyperbolic tangent and sigmoid activation functions
    Autorzy:
    Hajduk, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/200063.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FPGA
    hyperbolic tangent
    sigmoid
    floating point arithmetic
    tangens hiperboliczny
    arytmetyka zmiennoprzecinkowa
    funkcja sigmoidalna
    Opis:
    This paper presents the high accuracy hardware implementation of the hyperbolic tangent and sigmoid activation functions for artificial neural networks. A kind of a direct implementation of the functions in a few different versions is proposed and investigated both by software and hardware modeling. A single precision floating point arithmetic is applied. Apart from conventional design style with hardware description language coding, high level synthesis design techniques with the Matlab HDL coder and Xilinx Vivado HLS have also been investigated.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 5; 563-577
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Curve fitting problem: torque–velocity relationship with polynomials and Boltzmann sigmoid functions
    Autorzy:
    Milanov, P.
    Koroleova, G.
    Mavrevski, R.
    Pencheva, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/307013.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    prędkość
    staw łokciowy
    wielomiany
    funkcja Boltzmanna
    torque–velocity relationship
    elbow flexors
    extensors
    Boltzmann sigmoid
    polynomials
    fitting function
    model selection criteria
    Opis:
    The aim of this study was to investigate the curve fitting and model selection problem of the torque–velocity relationship of elbow flexors and extensors in untrained females. The second goal was to determine the optimal models in different function classes and the best, among the optimal ones. Lastly, test the best models to predict the torque were tested. Methods: Using the polynomials (second – fourth degree) and Boltzmann sigmoid functions, and a different presentation of data points (averages, a point cloud, etc.), we determined the optimal models by both error criteria: minimum residual sum of squares and minimum of the maximal absolute residue. To assess the best models, we applied Akaike and Bayesian information criteria, Hausdorff distance and the minimum of the smallest maximal absolute residue and the predictive torque–velocity relationships of the best models with torque values, calculated beyond the experimental velocity interval. Results: The application of different error and model selection criteria showed that the best models in the majority of cases were polynomials of fourth degree, with some exceptions from second and third degree. The criteria values for the optimal Boltzmann sigmoids were very close to those of the best polynomial models. However, the predicted torque–velocity relationships had physiological behavior only in Boltzmann’s sigmoid functions, and their parameters had a clear interpretation. Conclusion: The results obtained suggest that the Boltzmann sigmoid functions are suitable for modeling and predicting of the torque–velocity relationship of elbow flexors and extensors in untrained females, as compared to polynomials, and their curves are physiologically relevant.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2018, 20, 1; 169-184
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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