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Wyszukujesz frazę "PERFECT scale" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Screening of the pelvic floor muscle strenght of female physiotherapists
Autorzy:
Tomková, Šárka
Gurín, Daniel
Špringrová Palaščákov, Ingrid
Powiązania:
https://bibliotekanauki.pl/articles/527625.pdf
Data publikacji:
2019
Wydawca:
Krakowska Akademia im. Andrzeja Frycza Modrzewskiego
Tematy:
Pelvic floor muscles
PERFECT scale
incontinence
physiotherapists
Opis:
Introduction: The study compares contractions of pelvic floor muscles of female physiotherapists examined per vaginam with the results of the tests presented using Peritone device. Materials and methods: 23 female respondents were tested and evaluated as a correlation between the muscle strength P within the PERFECT scale and the measurements of maximum voluntary contraction using Peritone device performed by two examinators. Results: The differences in the results of the study using two methods were not statistically significant. There was also no significant difference in two independent examinations of the pelvic floor muscle strength performed by two physiotherapists. Conclusion: Based on the results of our study we can state that female respondents of our study were assessed from the viewpoint of pelvic floor muscle strength expressed by the means of the PERFECT scale referring to good results.
Źródło:
Państwo i Społeczeństwo; 2019, 1; 65-75
1643-8299
2451-0858
Pojawia się w:
Państwo i Społeczeństwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of laboratory conditions effect on prediction accuracy of size distribution of industrial ball mill discharge by using a perfect mixing model. A case study: Ozdogu copper-molybdenum plant
Autorzy:
Gharehgheshlagh, H. H.
Ergun, L.
Chehreghani, S.
Powiązania:
https://bibliotekanauki.pl/articles/110599.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ball mill scale-up
perfect mixing model
particle size distribution
simulation
Opis:
In this study, the perfect mixing model was used to investigate its accuracy level, under different laboratory conditions, in predicting the particle size distribution of industrial ball mills discharges. For this purpose, data sets of two laboratory ball mills with eight different compositions of balls and two industrial mills of a copper processing plant for seven different tonnages, which totally included 56 simulation operations, were used. For simulation, the necessary data were obtained through performing the breakage distribution function and kinetic grinding tests using laboratory mills. The results were used to determine the first order grinding kinetics and normalized breakage rate parameters. For the industrial scale, the simulation process was carried out using data, perfect mixing model equations and JKSimMet software. The results showed that the operating conditions of the laboratory mills were quite affected by the predictive power of the desired model. Comparing the measured and simulated values of P80, it is clear that 2 minutes of first order grinding using the Bond laboratory ball mill with standard operating conditions and single size ball load of 20 mm provided the best prediction with trivial errors, less than 10%, for all seven tonnages of the industrial mills. The results of this study together with more investigations on different plants can be helpful in optimization, simulation and scale-up procedures of ball mills.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1175-1187
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perfect absorption for modulus-near-zero acoustic metamaterial in air or underwater at low-frequency
Autorzy:
Gaafer, Fatma Nafaa
Powiązania:
https://bibliotekanauki.pl/articles/2141684.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustic metamaterial
perfect absorption
Fabry-Pérot resonances
subwavelength scale
modulus-near-zero
Opis:
We theoretically propose a method to achieve an optimum absorbing material through a modulus-near-zero (MNZ) metamaterial immersed in air or water with a change in slit width part. The destructive interference has paved the way to achieve perfect absorption (PA). Depending upon theoretical analysis, an acoustic metamaterial (AMMs) that supports resonance with a monopole (140 Hz) is developed to construct a low-frequency sound-absorbing technology. The dissipative loss effect can be by attentively controlling onto slit width to achieve perfect absorption. When there are thin slit width and visco-thermal losses in the structure, it is observed that they lead to high absorption. We use finite element simulations via COMSOL Multiphysics software to theoretical measurement in impedance tube and show the influence of structural parameters in both mediums. The results are of extraordinary correspondence at low frequency to achieve optimum perfect absorption (99%). That might support AMMs to actual engineering-related applications in the process of mitigating noise, slow sound trapping, notch filtering, energy conversion, and time reversal technology.
Źródło:
Archives of Acoustics; 2022, 47, 1; 25-31
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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