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    Wyświetlanie 1-11 z 11
    Tytuł:
    Detection and enumeration of Enteric bacteria associated with food handlers and surfaces of food manufacturing industry located in Hub city, Pakistan
    Autorzy:
    Ali, Razim
    Hayat, Amir
    Fatima, Madiha
    Noman, Muhammad
    Powiązania:
    https://bibliotekanauki.pl/articles/1182928.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    enterobacteriaceae
    foodborne microbes
    hygiene
    surface contamination
    food handlers
    e. coli
    sanitation
    Opis:
    Foodborne microorganisms harbor and adheres itself to the food material and surrounding surfaces for a long time and influence the food quality and consumers health. Among these microbes the presence of Enteric indicator bacteria in food premises confers the indication of entero-pathogens, i.e. E. coli, Salmonella, Shigella and Campylobacters that could cause severe systemic infections in consumers. In this study, the hygienic status of confectionery and supplementary food processing facility was evaluated. A total of 10497 examinations were performed on 3499 swab samples collected from food premises and handlers for the analysis of Enteric indicator bacteria. From swabs, 1277 (12.2%) isolates were identified in which Enterobacteriaceae were found with higher frequency 604 (47.3%) followed by Coliforms 293 (30.8%) and Escherichia coli 280 (21.9%) respectively. The mean count (CFU/cm2) was found maximum for plain surfaces (floors, walls and door), while the lowest was for equipment and machinery. Overall isolates percent prevalence was determined where Enterobacteriaceae were 47%, Coliforms 31% and Escherichia coli 22%. Majority of the floor surfaces were highly contaminated, where washing and sanitation practices were observed to be inappropriate. Worker hygiene status was lacking essential food safety and hygiene standards. In general, the Enteric bacteria were found with higher ratio, that could affect the food quality and quantity both to a greater extent with some influences on consumers health.
    Źródło:
    World Scientific News; 2016, 49, 2; 192-203
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison between traditional and disposable bed baths in Intensive Care Unit
    Autorzy:
    Amir, Haeril
    Yusuf, Muhammad
    Syam, Yuliana
    Irwan, Andi Masyitha
    Cahyani, Desy Dwi
    Djalid, Nia Kurnia
    Idrus, Hasta Handayani
    Rosita
    Powiązania:
    https://bibliotekanauki.pl/articles/2211427.pdf
    Data publikacji:
    2023-03-25
    Wydawca:
    Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
    Tematy:
    disposable bed baths
    number of microorganisms
    traditional bed baths
    Opis:
    Introduction and aim. This study aimed to compare the difference in the number of microorganisms (microbial counts) between traditional and disposable bed baths. Material and methods. This study is quasi-experimental with two groups. The sample consisted of 30 respondents from the traditional bed bath and the disposable bed bath groups. Cultures of the groin were obtained to compare the number of microorganisms before and after bathing. Results. Bathing with disposable bed baths has proven to be more effective in reducing the number of microorganisms in both the control group and the intervention group on day I and day II with p=0.014 and p=0.033. Conclusion. Disposable bed baths are more effective in reducing the number of microorganisms on the skin than traditional bed baths.
    Źródło:
    European Journal of Clinical and Experimental Medicine; 2023, 1; 108-113
    2544-2406
    2544-1361
    Pojawia się w:
    European Journal of Clinical and Experimental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Approximate solution of painlevé equation i by natural decomposition method and laplace decomposition method
    Autorzy:
    Amir, Muhammad
    Haider, Jamil Abbase
    Ahmad, Shahbaz
    Ashraf, Asifa
    Gul, Sana
    Powiązania:
    https://bibliotekanauki.pl/articles/2233067.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    natural decomposition method
    Laplace decomposition method
    series solution
    Adomain polynomial
    Painlevéequation
    Opis:
    The Painlevé equations and their solutions occur in some areas of theoretical physics, pure and applied mathematics. This paper applies natural decomposition method (NDM) and Laplace decomposition method (LDM) to solve the second-order Painlevé equation. These methods are based on the Adomain polynomial to find the non-linear term in the differential equation. The approximate solution of Painlevé equations is determined in the series form, and recursive relation is used to calculate the remaining components. The results are compared with the existing numerical solutions in the literature to demonstrate the efficiency and validity of the proposed methods. Using these methods, we can properly handle a class of non-linear partial differential equations (NLPDEs) simply. Novelty: One of the key novelties of the Painlevé equations is their remarkable property of having only movable singularities, which means that their solutions do not have any singularities that are fixed in position. This property makes the Painlevé equations particularly useful in the study of non-linear systems, as it allows for the construction of exact solutions in certain cases. Another important feature of the Painlevé equations is their appearance in diverse fields such as statistical mechanics, random matrix theory and soliton theory. This has led to a wide range of applications, including the study of random processes, the dynamics of fluids and the behaviour of non-linear waves.
    Źródło:
    Acta Mechanica et Automatica; 2023, 17, 3; 417--422
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of bentonite nanoclay for textile application
    Modyfikacja nano bentonitu do zastosowań włókienniczych
    Autorzy:
    Amir, Muhammad
    Hasany, Syed Farhan
    Asghar, Muhammad Sajid Ali
    Powiązania:
    https://bibliotekanauki.pl/articles/24202774.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    bentonite
    textile fabrics
    mechanical properties
    bentonit
    tekstylia
    właściwości mechaniczne
    Opis:
    The influence of the bentonite content (1, 3, 5 wt%) on the mechanical properties of lightweight cotton (C), polyester (P) and polyester-cotton (P/C 50/50) fabrics was investigated. Starch was used as a water-insoluble binder for coating fabrics. Bentonite nanoparticles were obtained by repeated hydration, decantation and evaporation of the water dispersion. The bentonite particle size was determined by the XRD method using the Debye-Scherrer equation. The diffraction of the laser beam was used to determine particles size distribution. The addition of bentonite nanoclay significantly improved tensile strength (26-61% and 99–118% in the warp and weft direction, respectively) and tear strength (4‒13% and 5–24% in the wrap and weft direction, respectively) of coated fabrics. Their abrasion resistance has also slightly increased. The biggest changes were noted for the cotton fabric, the smallest for the polyester fabric, which may result from the low compatibility between starch and the polyester fabric.
    Zbadano wpływ zawartości bentonitu (1, 3, 5% mas.) na właściwości mechaniczne lekkich tkanin bawełnianych (C), poliestrowych (P) i poliestrowo-bawełnianych (P/C 50/50). Jako nie-rozpuszczalny w wodzie środek wiążący do powlekania tkanin zastosowano skrobię. Nanocząstki bentonitu otrzymywano poprzez kilkukrotną hydratację, dekantację i odparowanie dyspersji wodnej. Wielkość cząstek bentonitu oznaczono metodą XRD, stosując równanie Debye-Scherrera. Dyfrakcja wiązki laserowej posłużyła do określenia rozkładu wielkości cząstek. Zastosowanie nanoglinki bentonitowej wpłynęło na istotną poprawę wytrzymałości na rozciąganie (o 26‒61% w kierunku osnowy i 99‒118% w kierunku wątku) oraz rozdzieranie (4‒13% w kierunku osnowy i 5‒24% w kierunku wątku) powlekanych tkanin. Nieznacznie zwiększyła się również ich odporność na ścieranie. Największe zmiany zanotowano w przypadku tkaniny bawełnianej, najmniejsze dla tkaniny poliestrowej, co może wynikać z małej kompatybilności między skrobią a tkaniną poliestrową.
    Źródło:
    Polimery; 2023, 68, 2; 79--85
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solutions of the nonlinear evolution problems and their applications
    Autorzy:
    Amir, Muhammad
    Haider, Jamil Abbas
    Rahman, Jamshaid Ul
    Ashraf, Asifa
    Powiązania:
    https://bibliotekanauki.pl/articles/2233663.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    Laplace variational iteration method
    nonlinear problems
    duffing equation
    simple pendulum
    mass and spring oscillator
    Simulink
    Opis:
    In this article, a well-known technique, the variational iterative method with the Laplace transform, is used to solve nonlinear evolution problems of a simple pendulum and mass spring oscillator, which represents the duffing equation. In the variational iteration method (VIM), finding the Lagrange multiplier is an important step, and the variational theory is often used for this purpose. This paper shows how the Laplace transform can be used to find the multiplier in a simpler way. This method gives an easy approach for scientists and engineers who deal with a wide range of nonlinear problems. Duffing equation is solved by different analytic methods, but we tackle this for the first time to solve the duffing equation and the nonlinear oscillator by using the Laplace-based VIM. In the majority of cases, Laplace variational iteration method (LVIM) just needs one iteration to attain high accuracy of the answer for linearization anddiscretization, or intensive computational work is needed. The convergence criteria of this method are efficient as compared with the VIM. Comparing the analytical VIM by Laplace transform with MATLAB’s built-in command Simulink that confirms the method’s suitability for solving nonlinear evolution problems will be helpful. In future, we will be able to find the solution of highly nonlinear oscillators.
    Źródło:
    Acta Mechanica et Automatica; 2023, 17, 3; 357--363
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zinc and graphene oxide composites as new protective coatings for oil and gas pipes
    Kompozyty cynku i tlenku grafenu jako nowe powłoki ochronne rur do przesyłu nafty i gazu
    Autorzy:
    Asghar, M. Sajid Ali
    Amir, Muhammad
    Hussain, Umer
    Sabri, Mohammed M.
    Powiązania:
    https://bibliotekanauki.pl/articles/24202808.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    corrosion resistance
    graphene oxide
    Hummers method
    nanocomposites
    electrophoretic deposition
    odporność na korozję
    tlenek grafenu
    metoda Hummersa
    nanokompozyty
    osadzanie elektroforetyczne
    Opis:
    A method was developed to obtain a durable coating consisting of zinc and graphene oxide (Zn-GO) in order to reduce the mechanical wear and tear rate of oil and gas pipelines made of steel. Graphene oxide was obtained from graphite by wet chemical oxidation (unmodified and modified Hummers’ method) using potassium permanganate and sulfuric acid. The process was carried out at various temperatures. The steel was covered with an ultrathin layer of Zn-GO using the electrophoretic deposition method. The GO particle size (< 90 nm) was confirmed by XRD and laser analysis. For GO particles obtained by the modified Hummers’ method, a significant correlation was observed in the scratch (R2 = 0.87) and the Vickers microhardness tests (R2 = 0.93), which indicates a lower wear rate of Zn-GO-coated steel.
    Opracowano metodę otrzymywania trwałej powłoki składającej się z cynku i tlenku grafenu (Zn-GO) w celu zmniejszenia zużycia mechanicznego rurociągów naftowo-gazowych wykonanych ze stali. Tlenek grafenu pozyskano z grafitu metodą mokrego utleniania chemicznego (niezmodyfikowana i zmodyfikowana metoda Hummersa) z użyciem nadmanganianu potasu i kwasu siarkowego. Proces prowadzono w różnej temperaturze. Stal powlekano ultra cienką warstwą Zn-GO techniką osadzania elektroforetycznego. Metodą XRD i analizą laserową potwierdzono wielkość cząstek GO (≤ 90 nm). Dla cząstek GO otrzymanych zmodyfikowaną metoda Hummersa zaobserwowano znaczącą korelację w teście zarysowania (R2 = 0.87) i mikrotwardości Vickersa (R2 = 0.93), co świadczy o mniejszym stopniu zużycia stali pokrytej powłoką Zn-GO.
    Źródło:
    Polimery; 2023, 68, 7-8; 378--385
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    BOX BEHNKEN DESIGN: A STATISTICAL APPROACH TO EVALUATE THE EFFECT OF CROSSLINKED CARBOXYMETHYL CELLULOSE AND SODIUM STARCH GLYCOLATE ON RELEASE KINETICS OF DRUG
    Autorzy:
    Hanif, Muhammad
    Abbas, Ghulam
    Rasul, Akhtar
    Khan, Sajid M.
    Amir, Muhammad N.
    Powiązania:
    https://bibliotekanauki.pl/articles/895395.pdf
    Data publikacji:
    2018-08-31
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    FTIR
    XRD
    DSC
    quality by design
    domperidone maleate
    drug release kinetics
    Opis:
    The aim of study was to evaluate the release kinetics of domperidone maleate (DM) from immediate release (IR) tablets prepared by wet granulation method. Box behnken design (BBD) was used to optimize and evaluate the main, interaction and quadratic effects of independent variables i.e. crosslinked carboxymethyl cellulose (CMC) (X1), sodium starch glycolate (SSG) (X2) and starch (X3) on responses R2 of first order (YI) and β value of weibull model (Y2). Prepared tablets were characterized by various physical tests, in-vitro drug release, fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). Accelerated stabilities studies were performed on optimized formulation D9. Y1 and Y2 were ranged from 0.9959 to 0.9994 and 0.041 to 0.912 respectively. β value of weibull model indicated the parabolic shape of dissolution curve. The quadratic model fit the data well and the resulting equations were used to predict the responses in the box behnken design. FTIR spectra showed the compatibility of DM with CMC and SSG. XRD presented diffraction lines indicates crystalline nature of drug. DSC thermograms indicated endothermic peak at 220 0C for DM. Stabilities studies revealed that no significant change in hardness, friability, disintegration time and dissolution release profile of DM. It is concluded that a combination of CMC and SSG can be used to enhance the dissolution and release kinetics of IR tablets of DM.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 4; 965-975
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Image encryption based on Chebyshev chaotic map and S8 S-boxes
    Autorzy:
    Hussain, Iqtadar
    Anees, Amir
    Alkhaldi, Ali Hussain
    Aslam, Muhammad
    Siddiqui, Nasir
    Ahmed, Rehan
    Powiązania:
    https://bibliotekanauki.pl/articles/173918.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    image encryption
    chaos
    noise-resistant
    statistical analysis
    key sensitivity
    Opis:
    The encryption of image data is artful as compare to others due to some special characteristics such as entropy, contrast, the correlation between the pixels, intensity, and homogeneity. During encryption process, it is conventionally not easy to manage these characteristics with non-chaotic cryptosystems. Therefore for the sake of strong encryption algorithms, in last decades many cryptographers have presented invulnerable schemes for image encryption based on the chaotic maps. This manuscript aims to propose a strong encryption scheme based on a symmetric group of permutation advanced encryption standard (AES) substitution boxes and modified Chebyshev map. Principally, the secret key depends upon the parameters of Chebyshev map to create confusion in the main image and is encrypted by the scheme made from the S8 AES S-boxes and chaotic map. By this procedure, one can obtain an encrypted image that is entirely twisted. The results of analyses showed that the presented image encryption is strong and invulnerable.
    Źródło:
    Optica Applicata; 2019, 49, 2; 317-330
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of safety climate on job performance and job satisfaction with moderating role of psychological capital
    Autorzy:
    Kiyani, Amir Saif Ali
    Rizvi, Tahir Hussain
    Khan, Muhammad Saqib
    Powiązania:
    https://bibliotekanauki.pl/articles/1375509.pdf
    Data publikacji:
    2019
    Wydawca:
    Międzynarodowy Instytut Innowacji Nauka – Edukacja – Rozwój w Warszawie
    Tematy:
    Safety climate
    Job Satisfaction
    Job Performance
    psychological Capital
    Conserva-tion of Resource Theory
    Public Sector Organization Rawalpindi and Islamabad
    Opis:
    The current research investigated the effect of safety climate on job satisfaction and job performance with psychological capital as a moderator between safety climate and job satisfaction as well as job performance. This research fills the gap by collecting empirical evidence from the emerging organizations of Pakistan. Conservation of resource theory (COR) is relevant to the research area. Data were collected from 300 employees from different Organizations. The current study is empirical and quantitative-based study is used to conducted research. Data were collected by convenient non-probability sampling techniques to be used and collected from employees working in the reputed organization; Chemical, Cement, Petroleum, Oil and Gas industry of Islamabad and Rawalpindi. Confirmatory Factor analysis was done through AMOS and hypotheses were tested through SPSS regression analysis process of Hayes model. To test the moderation effects, the process of Hayes model 1 was also performed. Safety climate has a positive relationship with the two DVs which are job performance and job satisfaction. Moreover, Psychological Capital played a significant moderating role between safety climate and job satisfaction as well as job performance. When Psychological capital was high, the relationship between safety climate and job performance as well as the relationship between safety climate and job satisfaction were stronger. These results are important for future studies. This research recommended top management and responsible authorities to promote safety climate activates between their organization in order to enhance their employees satisfy and high performed. Moreover, this research strongly recommends psychological capital amongst organization looking for highly satisfied and effective employees. Further implications for practice were discussed in detail.
    Źródło:
    International Journal of New Economics and Social Sciences; 2019, 9(1); 363-379
    2450-2146
    2451-1064
    Pojawia się w:
    International Journal of New Economics and Social Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and optimization of a cross-beam force transducer for a stationary dynamometer for measuring milling cutting force
    Autorzy:
    Rizal, Muhammad
    Ghani, Jaharah A.
    Usman, Husni
    Dirhamsyah, Muhammad
    Mubarak, Amir Zaki
    Powiązania:
    https://bibliotekanauki.pl/articles/24084662.pdf
    Data publikacji:
    2023
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    force transducer optimisation
    stationary dynamometer
    cutting force measurement
    Opis:
    This paper’s objective is to design and optimize a force transducer to build a stationary dynamometer that can measure three axes of milling cutting force. To reduce interference error and increase sensitivity, the force transducer's Maltese cross-beam design was optimized. The force transducer's performance depends on three design parameters: the cross-rectangular beam's through-hole length and width, the compliant plate thickness, and the strain, stress, and stiffness of force transducer constructions calculated by ANSYS. The response surface method (RSM) estimates a desired second-order polynomial function for three geometric parameters based on sensitivity, interference error, safety factor, and stiffness. A stationary dynamometer prototype was made with four optimized force transducers and several piezoresistive strain sensors. The developed dynamometer has good linearity, repeatability, and hysteresis, as well as high sensitivities and low cross-sensitivity errors. The reference dynamometer's cutting force measurements were very close to those of the designed dynamometer in the validation test.
    Źródło:
    Journal of Machine Engineering; 2023, 23, 2; 41--65
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling the internal forces of SMEs digital adaptation strategy towards industry revolution 4.0
    Modelowanie wewnętrznych sił MSP strategia adaptacji cyfrowej w kierunku przemysłu rewolucji 4.0
    Autorzy:
    Rusly, Fariza Hanim
    Talib, Yurita Yakimin Abdul
    Hussin, Muhammad Rosni Amir
    Mutalib, Hafizah Abd
    Powiązania:
    https://bibliotekanauki.pl/articles/2147289.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    adaptacja do zmiany
    zarządzanie zmianą
    adaptacja cyfrowa
    cyfryzacja
    strategia cyfrowa
    IR 4.0
    MŚP
    change adaptation
    change management
    digital adaptation
    digitalisation
    digital strategy
    SME
    Opis:
    This paper explores internal forces that formed the digital adaptation strategy for SMEs embarking on the digital transformation of Industrial Revolution 4.0 (IR4.0). A qualitative case study design was adopted involving Small and Medium-sized Enterprises (SMEs) from the manufacturing and service sectors in Malaysia. Data was gathered through semi-structured interviews and supported by the resources from the firms’ website. Adopting the Planned Process Change Model and Technology Adaptation Process Model as new theoretical lenses in the digital adaptation study, findings from the multiple case studies using thematic analysis revealed four dimensions of internal forces driving SMEs’ digital adaptation: business strategy, value creation, digital leadership and digital talent. Findings contribute to the theoretical development of the digital adaptation strategy from a change management perspective.
    Niniejszy artykuł bada siły wewnętrzne, które ukształtowały strategię adaptacji cyfrowej dla MŚP rozpoczynających cyfrową transformację rewolucji przemysłowej 4.0 (IR4.0). Przyjęto jakościowy projekt studium przypadku z udziałem MŚP z sektora produkcyjnego i usługowego w Malezji. Dane zostały zebrane za pomocą częściowo ustrukturyzowanych wywiadów i poparte zasobami ze strony internetowej firm. Przyjmując Model Planowanej Zmiany Procesu i Model Procesu Adaptacji Technologii jako nowe soczewki teoretyczne w badaniu adaptacji cyfrowej, wnioski z wielu studiów przypadku z wykorzystaniem analizy tematycznej ujawniły cztery wymiary sił wewnętrznych napędzających adaptację cyfrową MŚP: strategia biznesowa, tworzenie wartości, przywództwo cyfrowe i talent cyfrowy. Ustalenia przyczyniają się do teoretycznego opracowania strategii adaptacji cyfrowej z perspektywy zarządzania zmianą.
    Źródło:
    Polish Journal of Management Studies; 2021, 24, 1; 306--321
    2081-7452
    Pojawia się w:
    Polish Journal of Management Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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