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    Wyświetlanie 1-7 z 7
    Tytuł:
    Impact of Edge Detection Algorithms in Medical Image Processing
    Autorzy:
    Anas, Ruba
    Elhadi, Hadeel A.
    Ali, Elmustafa Sayed
    Powiązania:
    https://bibliotekanauki.pl/articles/1075754.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Canny
    Edge detection
    Gaussian Noise
    LOG
    Laplacian
    Prewitt
    Salt & Pepper Noise
    Opis:
    Imaging technology in Medicine let the doctors to see the interior portions of the body for easy diagnosis. It also helped doctors to make keyhole surgeries for reaching the interior parts without really opening too much of the body. Noise in medical images appears in an image from a variety sources or it is the random variation of brightness or color information in images. Edge detection is a common process in the treatment of medical images and it is a very useful task for object recognition of human organs. Edge detection also show where shadows fall in an image or any other distinct change in the intensity of an image due to noise effects. In this paper we evaluated the performance of different edge detection algorithms; Canny, Prewitt, LOG, and Laplacian with and without adding filer such as wiener and median. The statement of effectiveness in removing noise and preserving important information in medical image is identified by using quality measurements like PSNR and MSE. Results show that the best algorithm for displaying edge and removing salt & pepper noise is the Prewitt Algorithm after using the median filter. Additionally, it was found that the best algorithm for displaying edge and removing Gaussian noise is the Canny algorithm after using the median filter.
    Źródło:
    World Scientific News; 2019, 118; 129-143
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    IR Detection of Impact Places of Projectiles in the Training System “ŚNIEŻNIK”
    Detekcja w podczerwieni miejsc uderzenia pocisków w systemie szkolno-treningowym „Śnieżnik”
    Autorzy:
    Świderski, W.
    Głogowski, T.
    Hłosta, P.
    Stępniak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/403412.pdf
    Data publikacji:
    2018
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    electronics
    multimedia shooting range
    infrared radiation
    projectile
    elektronika
    strzelnica multimedialna
    podczerwień
    pocisk
    Opis:
    Multimedia laser-shooting training systems are more and more frequently used for trainings uniformed services and protective formations. One of the subsequent stages of the development of the “Śnieżnik” system is the possibility of training with weapon and combat ammunition, basing on dynamic scenarios and moving targets displayed on a screen. The paper presents application of IR for detection of the impact place of the projectile of combat or blank ammunition.
    Multimedialne laserowe strzeleckie systemy szkoleniowe coraz częściej są wykorzystywane w szkoleniu służb mundurowych i formacji ochronnych. Jednym z kolejnych etapów rozwoju systemu „Śnieżnik” jest umożliwienie treningu z użyciem broni i amunicji bojowej w oparciu o dynamiczne scenariusze oraz poruszające się cele wyświetlane na ekranie. W artykule przedstawiono zastosowanie podczerwieni do detekcji miejsca uderzenia pocisku amunicji bojowej i ćwiczebnej.
    Źródło:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2018, 9, 2 (32); 99-109
    2081-5891
    Pojawia się w:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of membrane pore structure on protein detection sensitivity of affinity-based immunoassay
    Autorzy:
    Ahmad, A. L.
    Ideris, N.
    Ooi, B.S.
    Low, S.C.
    Ismail, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/777927.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    morphology
    PVDF membrane
    protein immobilization
    Opis:
    Understanding a membrane’s morphology is important for controlling its final performance during protein immobilization. Porous, symmetric membranes were prepared from a polyvinylidene fluoride/N-methyl-2-pyrrolidinone solution by phase inversion process, to obtain membrane with various microsized pores. The concentration and surface area of aprotein dotted on the membrane surface were measured by staining with Ponceau S dye. The dotted protein was further scanned and analysed to perform quantitative measurements for relative comparison. The intensity of the red protein spot and its surface area varied depending on the membrane pore size, demonstrating the dependence of protein immobilization on this factor. The membrane with the smallest pore size (M3) showed the highest protein spot intensity and surface area when examined at different protein concentrations. An increase in the applied protein volume showed a linearity proportional trend to the total surface area, and an uneven round dot shape was observed at a large applied volume of protein solution.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 2; 97-103
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of damages in hybrid composite plates with the use of elastic waves generated by PZT active sensors
    Autorzy:
    Barski, M.
    Pająk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/246873.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    elastic waves
    hybrid composite plates
    piezoelectric active sensors
    low velocity impact
    damages
    FEM
    Opis:
    The presented article is devoted to the problem of detection and localization of damages occurring in components of structures, which are made of hybrid composite materials. The subject of the work is a square plate consisting of a single layer made of aluminum alloy and several layers made of glass fibres (glass fabric) and epoxy resin. On the surface, which is made of composite, 12 piezoelectric elements are installed. These elements sequentially, one by one, generates a signal that is further recorded by the remaining piezoelectric elements. Picked up signal for the selected pair of activator – sensor is compared with the reference signal. The reference signal corresponds to the intact structure. This kind of approach is known as the pitch – catch configuration. In situations when the signal obtained for interrogated structure and reference one differs significantly, this may indicate that a damage exists between the activator and the sensor. Next, taking into account the information obtained from the other sensors, it is possible not only to detect but also to determine the approximate location of the flaw and to estimate its size. In order to visualize the obtained results, an especially dedicated software is developed according to the algorithms available in the literature – probability ellipse. Several computer simulations of wave propagation are performed using the finite element method. The proposed procedure is also tested experimentally. The presented approach makes it possible to detect both single and multiple damages.
    Źródło:
    Journal of KONES; 2017, 24, 2; 17-24
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of potential areas of changing climatic conditions at a regional scale until 2100 for Saxony, Germany
    Autorzy:
    Kronenberg, R.
    Franke, J.
    Bernhofer, C.
    Körner, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/108494.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
    Tematy:
    multivariate statistics
    cluster analysis
    climate impact research
    WETTREG2010
    WEREX-V
    RaKliDa
    Opis:
    Two different approaches are applied for the investigation of possible changes within the climate regime – as an important component of vulnerability – on a regional scale for Saxony, Germany. Therefore data were applied from the output of the statistical climate models WETTREG2010 and WEREX-V for a projected period until 2100. In the first step, rain gauge-based precipitation regions with similar statistics have been classified. The results show that stable regions are mainly located in the Ore Mountains, while regions of higher uncertainty in terms of a climate signal exist particularly between the lowlands and mountains. In the second step, station-based data on precipitation, temperature and climatic water balance were interpolated by the regionalisation service RaKliDa. Model runs which lay closest to the observed data for the period 1968 to 2007 were identified. Therefore, regions of similar climates were classified and compared by means of a Taylor diagram. The derived patterns of the observed data are in good agreement with formerly defined climate regions. In the final step, anomalies of 10 yearlong averages from 2021 until 2090 were calculated and then spatially classified. The classification revealed four complex regions of changing climate conditions. The derived patterns show large differences in the spatial distribution of future precipitation and climatic water balance changes. In contrast, temperature anomalies are almost independent of these patterns and nearly equally distributed.
    Źródło:
    Meteorology Hydrology and Water Management. Research and Operational Applications; 2015, 3, 2; 17-26
    2299-3835
    2353-5652
    Pojawia się w:
    Meteorology Hydrology and Water Management. Research and Operational Applications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the Impact of Transient Disturbances on Railway Signaling Systems Using an Adapted Time-Frequency Analysis Method
    Autorzy:
    Kousri, M. R.
    Deniau, V.
    Heddebaut, M.
    Baranowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226198.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    EMC
    railways
    signaling
    transient disturbances
    transient detection
    cellular radio
    bit error rate
    Opis:
    As many other industrial environments, the railway electromagnetic environment is characterized by a large number of electromagnetic signals and disturbances. Among these, transient signals, with high energy level and wide frequency spectrum, represent an important threat to different signaling subsystems. In this paper, a new methodology dedicated to the detection and the characterization of the transient disturbances is presented. Based on a flexible and adjustable time-frequency analysis, this methodology is used to evaluate the impact of transient disturbances on a ground-to-train radio communication. A test bench was developed in order to validate the results of this evaluation.
    Źródło:
    International Journal of Electronics and Telecommunications; 2017, 63, 4; 347-354
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of selected environmental factors on attendance in the Breast and Cervical Cancer Early Detection Programme in the Wielkopolska Province of Poland during 2007–2012
    Autorzy:
    Kycler, Witold
    Kubiak, Anna
    Rzymski, Paweł
    Wilczak, Maciej
    Trojanowski, Maciej
    Roszak, Magdalena
    Włoszczak-Szubzda, Anna
    Rzymska, Izabela
    Powiązania:
    https://bibliotekanauki.pl/articles/989556.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    screening
    breast cancer
    cervical cancer
    Opis:
    Breast and cervical cancer represent a significant health and economic issue for Polish society, although if detected early, both can be cured successfully. For this reason, since 2006, according to the National Cancer Combat Programme, populationbased screening programmes have been implemented, aimed at reducing the mortality and morbidity for breast and cervical cancer. The aim of this study is to determine which of the selected four environmental factors affect attendance for screening mammography and cytology. Analysis included data from questionnaires filled in during mammography by 582,959 women aged 50–69 years, and 288,142 women during cytology, aged 25–59 years, in 2007–2012 in the Wielkopolska Province of Poland. It was found that the impact of medical staff on the attendance for cytological screening was the strongest statistically significant factor (p = 0,0001). Invitation by name (p=0,001) and other factors (p= 0,0001) also affected the attendance. In the cytological screening, medical staff was the factor that had the greatest impact on attendance. Other factors, such as self-reporting, increased participation in the next screening rounds, although the factors that affect attendance changed over time. Their constant analysis is essential for the efficient and effective evaluation of screening programsme.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2017, 24, 3
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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