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Wyszukujesz frazę "Anjum, N. A." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Determination of residual stress distribution in high strength aluminum alloy after EDM
    Autorzy:
    Mehmood, S.
    Sultan, A.
    Anjum, N. A.
    Anwar, W.
    Butt, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/103214.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    electric discharge machining
    residual stresses
    discharge current
    aluminum alloy
    Opis:
    Thermal energy produced by discrete and random electric sparks in electric discharge machining (EDM) melts surface material. A portion of this molten material is removed and the remaining material resolidified by rapid cooling in a hydrocarbon oil. The effect of repeated heating and cooling of the surface and sub surface material with complex temperature gradients results in residual stresses in machined parts. The aim of this investigation is to determine the distribution of residual stresses in the depth of machined material with respect to discharge current, most important electric parameter during EDM. It is well known that surface finish is dependent on discharge current. Therefore, investigations were carried out for smaller discharge current levels i.e. 3, 6, 9, 12 ampere. Hole-drill strain gauge method is used for the determination of residual stresses in the depth of material. For comparison purposes, residual stresses are also determined for conventionally turned specimens. This study provided quantitative analysis of the residual stresses for various discharge current in EDM which is a key parameter in deciding the service life of material.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 1; 29-35
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the risk for human health of Enterovirus and Hepatitis A virus in clinical and water sources from three metropolitan cities of Pakistan
    Autorzy:
    Ahmad, T.
    Adnan, F.
    Nadeem, M.
    Kakar, S.J.
    Anjum, S.
    Saad, A.
    Waheed, A.
    Arshad, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2081926.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    epidemiology
    Enterovirus (EntV)
    HAV
    PCR
    virology
    Opis:
    Introduction. Molecular studies have confirmed the silent circulation of enterovirus (EntV) and hepatitis A virus in the environment, even in the absence of clinical manifestation. Viral pathogens are among the major causes of disease outbreaks, particularly in the bigger cities and both in the developed and underdeveloped nations. Materials and method. Between June 2016 – June 2017, 97 samples of drinking water, river water polluted with sewage and blood were selected and obtained from high risk communities in Pakistan. Negatively charged membrane filters were used to concentrate the virus, followed by the use of specific PCR primers set for quick identification of the waterborne viruses. Results. Enteroviruses were recovered from 40%, 28.57% and 33.33% of river water polluted with sewage samples in Lahore, Islamabad and Rawalpindi, respectively, while the presence of 13.13% and 11.76% of viral load was also confirmed in the drinking water of Lahore and Rawalpindi, respectively. A high prevalence of HAV (12.5% and 21.05%) was also verified in the clinical samples. Phylogenetic analysis indicated close resemblance of HAV isolates with the Indian strains. This study is the first ever comparative analysis of the EntV and HAV isolated from environmental samples and clinical specimen on a molecular level. Conclusions. The parallel surveillance of EntV and HAV in the river water polluted with sewage, and clinical samples is quite helpful for controlling and reducing the disease burden of the waterborne illnesses.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2018, 25, 4; 708-713
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Frequency of hepatitis E and Hepatitis A virus in water sample collected from Faisalabad, Pakistan
    Autorzy:
    Ahmad, T.
    Anjum, S.
    Zaidi, N-us-S.S.
    Ali, A.
    Waqas, M.
    Afzal, M.S.
    Arshad, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/50021.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2015, 22, 4
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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