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Wyszukujesz frazę "KAN." wg kryterium: Autor


Tytuł:
Some Hellenistic and late Roman terracotta lamps in the Sinop Archaeological Museum in northern Turkey
Autorzy:
Kan Şahín, Gülseren
Aksoy, Eray
Powiązania:
https://bibliotekanauki.pl/articles/1634112.pdf
Data publikacji:
2020-01-04
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
Hellenistic/Roman period
Sinope
Paphlagonia
northern Anatolia
museum studies
Opis:
The paper considers some terracotta lamps from recent rescue excavations by the Sinop Archaeological Museum in ancient Sinope, classifying them by types and chronological groups, from the 2nd century BC to the 7th century AD. The lamps represent part of the local lamp-making tradition, which is underinvestigated although equally important as the amphora production industry in this eastern Paphlagonian city.
Źródło:
Polish Archaeology in the Mediterranean; 2019, 28(1); 349-361
1234-5415
Pojawia się w:
Polish Archaeology in the Mediterranean
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examination of Different Heat Exchangers and the Thermal Activities of Different Designs
Autorzy:
Ipek, O.
Kan, M.
Gurel, B.
Powiązania:
https://bibliotekanauki.pl/articles/1031281.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
heat exchangers
compact heat exchanger
micro channel heat exchanger
Opis:
In this study, instead of gasketed or brazed plate heat exchangers, which are used in various fields of application, a direct metal sintering method is used to design a heat exchanger with its original geometry and with different geometries. Studies of heat exchangers found in published literature were reviewed, and the thermal behaviors of the proposed unique designs were examined. Usually heat exchangers using this design do not use channel spacing angles of 30-45-60-75° for the plate ducts. The thermal behaviors of the fluid-circulating systems were analyzed using ANSYS FLUENT software, and they used the boundary conditions found in the literature for this design. Heat transfer between the heat exchanger channels and channel walls was calculated. The analyses results show that an increase in the amount of heat transfer surface area and also an increase in surface roughness increased the amount of positive heat transfer.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 580-584
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Aspect Ratio on Natural Convection in a Cavity with Wavy Walls
Autorzy:
Arici, M.
Kan, M.
Karabay, H.
Powiązania:
https://bibliotekanauki.pl/articles/1401974.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.25.+f
47.15.Rq
47.55.P-
47.20.Bp
Opis:
In this study, flow characteristics and natural convection in a cavity with two wavy walls is studied numerically. The wavy walls of the cavity are isothermal and at different temperatures while other straight walls are adiabatic. The fluid considered inside the cavity is air having Prandtl number of 0.71. A parametric study is conducted for various aspect ratios (1 ≤ AR ≤ 5), Rayleigh numbers (10³ ≤ $Ra_{H}$ ≤ 10⁶) and inclination angles (0° ≤ θ ≤ 180°). Streamlines, isotherms and local and mean Nusselt numbers are presented to show the effect of the investigated parameters on the flow field and heat transfer.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-197-B-200
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Analysis of Pulverised Coal Fired Boiler with Different Burner Geometries
Autorzy:
Gurel, B.
Ipek, O.
Kan, M.
Powiązania:
https://bibliotekanauki.pl/articles/1402493.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.15.+a
Opis:
Pulverized coal combustion is extensively used in utility boilers, industrial boilers, furnaces, kilns, and other energy conversion appliances. The effective utilization of pulverized coal is the main problem in study of combustion processes, particularly in burning low-grade coal. It is well known that the emission of nitrogen oxides $(NO_{x})$ during coal combustion is a main environmental problem. In this study, three different pulverised coal burner geometries for a pulverised coal fired boiler have been studied by numerical analysis. GLI-Tunçbilek coal was used as fuel. Three-dimensional numerical analysis was carried out using Ansys Fluent code. Realizable K-ε turbulence method, single rate devolatilization method, multiple char combustion method and second-order upwind discretization method were used during calculations. Coal particle diameter and coal mass flow rate were assumed to be 70 μm and 378 kg/h respectively.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-43-B-45
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Investigation on Hydrodynamic Combustion and NO_x Emission Behavior in 8 MW Circulating Fluidized Bed
Autorzy:
İpek, O.
Gürel, B.
Kan, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031746.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
circulating fluidized bed
hydrodynamic analysis
multi-phase flow
NO_x emissions
clean coal
Opis:
Multi-phase flow is one of the types of flow which is frequently observed in natural phenomena and engineering applications. Circulating fluidized beds constitute an important application of multi-phase flow. The combustion and emission behaviours in circulating fluidized beds are determined by hydrodynamic of bearing. The most appropriate combustion can be provided with the hydrodynamic structure of bearing, taking into account fuel and operating parameters. Therefore, the hydrodynamic structure of circulating fluidized beds should be displayed with mathematical/physical modelling and simulation approach for its analysis and synthesis. Mathematical analysis in today's conditions is very difficult or impossible because of excessive turbulence, unstable and two-phase flow characteristics of the bed. Therefore, the most effective way to do this is the use the physical modelling and simulation approach. In this study, 8 MW circulating fluidized bed hydrodynamic analysis are made by ANSYS-FLUENT R14 commercial CFD code and then combustion and emissions analysis are made with hydrodynamic analysis results. These analysis results show that combustion chamber exit mean NO_x emission was 38.5 ppm and combustion chamber exit mean temperature was 1123 K.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 553-557
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plate Heat Exchangers as a Compact Design and Optimization of Different Channel Angles
Autorzy:
Kan, M.
Ipek, O.
Gurel, B.
Powiązania:
https://bibliotekanauki.pl/articles/1402529.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.15.+a
Opis:
In this study, thermal treatments have been investigated for different channel angles and mass flow rates of a compact heat exchanger have been manufactured by direct metal laser sintering technique instead of a sealed and brazed one used in many areas. Boundary conditions of available heat exchanger experimental test have been used in laboratory. In this study, we have designed for compact heat exchanger of 30°, 45° and 60° channel angle and used three different mass flow rates (0.2, 0.3, and 0.43 kg/s). Heat transfers occurring between heat channels and walls of heat exchangers for different channel angles and efficiency of heat exchangers have been calculated. As a result of the analysis, it has been determined that in order for maximum of heat transfer of a compact heat exchanger, following working conditions ought to be fulfilled: channel angle 30°, hot water input temperature 60°C, cold water input temperature 15°C, and mass flow rate 0.43 kg/s.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-49-B-52
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of frequency and idiomaticity on second language reading comprehension in children with English as an additional language
Autorzy:
Kan, Rachel T. Y.
Murphy, Victoria A.
Powiązania:
https://bibliotekanauki.pl/articles/780665.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
reading comprehension
vocabulary
English as an additional language
idioms
bilingual language development
Opis:
Vocabulary plays an important role in reading comprehension in both the L1 and the L2 (Murphy, 2018). In measuring vocabulary knowledge, however, researchers typically focus on mono-lexical units where vocabulary assessments tend not to take into account multi-word expressions which include phrasal verbs, collocations, and idioms. Omitting these multi-word lexical items can lead to an over-estimation of comprehension skills, particularly in reading. Indeed, adult learners of English comprehend texts containing a larger number of multi-word expressions less well compared to texts containing fewer of these expressions, even when the same words are used in each text (Martinez & Murphy, 2011). To investigate whether children learning English as an additional language (EAL) face a similar challenge, two reading comprehension tests were administered to EAL and monolingual (non-EAL) English-speaking children in primary school. Both tests contained the same common words, but whereas in one test some of the words occurred in multi-word expressions, in the other test they did not. Reading comprehension was significantly reduced for both groups of children when multi-word expressions were included. Monolingual participants generally performed better than children with EAL on both tests further suggesting that children with EAL may face a particular disadvantage in English reading comprehension. These results are discussed within the context of the importance of developing rich vocabulary knowledge in all children, and especially emergent bilingual children, within primary school and beyond.
Źródło:
Studies in Second Language Learning and Teaching; 2020, 10, 3; 579-605
2083-5205
2084-1965
Pojawia się w:
Studies in Second Language Learning and Teaching
Dostawca treści:
Biblioteka Nauki
Artykuł

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