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Wyszukujesz frazę "Aprilia, Sri" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Optimization of Particle Size and Ramie Fiber Ratio on Hybrid Bio Panel Production from Oil Palm Trunk as Thermal Insulation Materials
Autorzy:
Mawardi, Indra
Nurdin
Fakhriza
Rizal, Samsul
Aprilia, Sri
Faisal, Muhammad
Jaya, Ramadhansyah Putra
Powiązania:
https://bibliotekanauki.pl/articles/2202371.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
oil palm trunk
hybrid bio panel
thermal insulation
particle size
ramie fibre ratio
RSM
response surface methodology
Opis:
The abundant availability of waste oil palm trunks is one of the potential fibers for new thermal insulation materials. While focusing on the manufacturing of thermal insulation materials, the main points to be considered are particle size, reinforcement fiber ratio, and press durations, besides binders type and temperature. This study aimed to optimize the manufacturing process of hybrid bio panels based on oil palm trunks as thermal insulation material. The response surface methodology (RSM), with a Box-Behnken Design (BBD), was used to model and optimize the manufacturing process variables. A total of 17 hybrid bio panels were in operation and the independent variables used were particle size, ramie ratio, and press duration. The dependent variables were water absorption, thickness swelling, MOR, and thermal conductivity. The hybrid bio panel obtained under the optimum conditions was characterized by thermogravimetric analysis to observe thermal stability. On the basis of analysis of variance and the contour plot, it was discovered that the interaction between particle size and ramie fiber ratio was a significant variable to optimize hybrid bio panel manufacture. The thermal resistance and modulus of rupture of hybrid bio panels also improved with higher particle size and ramie fiber ratio. The optimum manufacturing process was obtained at OPT particle size of 0.248 mm, ramie fiber ratio of 19.775, and press duration of 25 min. This condition produces a thermal conductivity of 0.079 W/mK, modulus of rupture of 17.702 MPa, water absorption of 54.428%, and thickness swelling of 21.974%. In addition, the hybrid bio panel resulted in thermal stability of 341 °C.
Źródło:
Journal of Ecological Engineering; 2023, 24, 2; 39--49
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differences in the spatial distribution and characteristics of urban beggars: the case of the Sanglah district in Denpasar (Indonesia)
Autorzy:
Shara, Aprilia Riszi Indah Dewi
Listyaningsih, Umi
Giyarsih, Sri Rum
Powiązania:
https://bibliotekanauki.pl/articles/1050963.pdf
Data publikacji:
2020-12-21
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
characteristics of beggars
spatial distribution
urban beggars
urban poverty
Indonesia
Opis:
The study set out to analyse the differences in the characteristics and spatial distribution of urban beggars in Sanglah, Denpasar City. It employed survey research for data collection by observation, structured interviews with a questionnaire, and documentation. These data were later processed and analysed in a quantitative descriptive manner. The results show that, based on religion, there were two groups of beggars, namely Muslim and Hindu. Spatially, the Hindu beggars disregarded the religion of the people they implored, whereas the Muslim beggars would only target the houses and shops owned by Muslims. Those two class of beggars differ in languages, bagging duration, daily-earning, clothing, and sympathy-drawing strategy during the panhandling
Źródło:
Quaestiones Geographicae; 2020, 39, 4; 109-119
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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