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Wyświetlanie 1-15 z 38
Tytuł:
Women’s Career Development Towards School Superintendency: An Investigation into the Effect of Tacit Learning
Autorzy:
Kim, Yong-Lyun
Powiązania:
https://bibliotekanauki.pl/articles/26469813.pdf
Data publikacji:
2013-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
school superintendency
women administrators
career development
tacit learning
Opis:
Career development can be discussed in two primary ways: 1) as a type of formal education and job preparation that a person receives; and 2) as a type of informal learning-related career experiences that a person encounters. This study investigates the effect of learning preparedness on female school administrators’ career development. For the data analysis, this study uses the Structural Equation Modeling statistics. The findings from the analysis support the view that tacit learning from both direct and indirect job experiences has a greater effect on women’s career development than formal learning. The effect of these factors, however, varies according to women’s aspirations for superintendency.
Źródło:
The New Educational Review; 2013, 31; 241-251
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On some radius results for normalized analytic functions
Autorzy:
Kim, Yong
Kwon, Ern
Powiązania:
https://bibliotekanauki.pl/articles/1294513.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Hausdorff-Young theorem
univalent function
Hardy space
Dirichlet space
Opis:
We investigate some radius results for various geometric properties concerning some subclasses of the class of univalent functions.
Źródło:
Annales Polonici Mathematici; 1998, 68, 1; 51-60
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Confucian Thought Affecting Education in South-East Asian Countries vs. Socratic Education Philosophy in Western Countries
Poglądy Konfucjusza oddziałujące na edukację w krajach południowo-wschodniej Azji a filozofia edukacji Sokratesa w krajach zachodnich
Autorzy:
Juszczyk, Stanisław
Kim, Yong Deog
Powiązania:
https://bibliotekanauki.pl/articles/1943100.pdf
Data publikacji:
2017-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Socrates
Confucius
culture
education
learning
Western countries
Asian countries
Sokrates
Konfucjusz
kultura
edukacja
uczenie się
kraje zachodnie
kraje azjatyckie
Opis:
Socrates and Confucius constitute roots of western and eastern civilization respectively and represent very different cultural values and educational traditions. Both of the philosophers lived around 4 – 5th century B.C.E., but there were huge differences in the social and cultural environments in which they lived. Different cultural and social factors in ancient Greece and China led to differences in Socratic and Confucian approaches to learning. Their educational philosophies have been discussed on the base of the aim of education, the content of education, the teaching process, and the nature of the contemporary education. The method used in the described study is hermeneutics, or interpretation of the literary (here scientific) texts, thus the study is cross-cultural in nature and concerns the features of the contemporary education in both cultures.
Sokrates i Konfucjusz stanowią o fundamentach odpowiednio zachodniej i wschodniej cywilizacji i reprezentują bardzo różne wartości kulturowe oraz tradycje edukacyjne. Obaj filozofowie żyli około IV–V wieku przed naszą erą, lecz w bardzo różnych środowiskach społecznych i kulturowych. Różne czynniki kulturowe i społeczne w starożytnej Grecji i Chinach doprowadziły do różnych poglądów Sokratesa i Konfucjusza na uczenie się. Ich filozofie edukacji zostały poddane dyskusji na bazie celów edukacji, zawartości merytorycznej, procesu nauczania i natury współczesnej edukacji. W opisanych badaniach użyto metodę hermeneutyczną, zwaną inaczej interpretacją tekstów literackich (tutaj naukowych), z tego powodu badania mają charakter interdyscyplinarny i dotyczą cech współczesnej edukacji w obu kulturach.
Źródło:
Athenaeum. Polskie Studia Politologiczne; 2017, 56; 97-110
1505-2192
Pojawia się w:
Athenaeum. Polskie Studia Politologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Who I am asking about: What the sentence endings imply about the unexpressed subjects in wh-questions
Autorzy:
Izutsu, Katsunobu
Kim, Yong-Taek
Powiązania:
https://bibliotekanauki.pl/articles/1036575.pdf
Data publikacji:
2019-12-11
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Opis:
This study demonstrates that the sentence endings of Korean and Japanese wh-questions can be analyzed as serving to evoke and, in a weaker sense, to mark an unexpressed verb subject. This study further contends that the endings are not complex forms with successive morphemes each contributing to the whole meaning but rather simplex forms each of which has its own meaning and function. This study argues that pragmatic groupings of event participants help the sentence endings to mark subjects in the Korean and Japanese languages as well as other languages of the world.
Źródło:
Investigationes Linguisticae; 2018, 41; 43-56
1426-188X
1733-1757
Pojawia się w:
Investigationes Linguisticae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of Mobile Technologies to Promote Scientific Discovery Learning in Elementary School
Autorzy:
Lee, June
Koo, Yangmi
Kim, Yong-Lyun
Powiązania:
https://bibliotekanauki.pl/articles/26184010.pdf
Data publikacji:
2013-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
mobile technology
discovery learning
Smart Science
Opis:
The purpose of the study was to identify educational effects of a new learning method that integrates mobile-technology-based science learning with activity oriented discovery learning. The major finding of the study was that the mobile technology-based Science program enabled students to learn scientific knowledge through associated activities and creatively apply their knowledge to complete the mission of the learning. Also, the study found that the use of tablet PCs and SNS for scientific inquiry activities facilitated students to learn in fun ways, to collaborate with other students, and to share what they have learned with each other.
Źródło:
The New Educational Review; 2013, 32; 264-274
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nation Branding through Internationalization of Higher Education: A Case Study of African Students in South Korea
Autorzy:
Park, Jeong Kyung
Kim, Yong Deog
DeMatteo, Kaia
Powiązania:
https://bibliotekanauki.pl/articles/2004916.pdf
Data publikacji:
2016-09-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
African students
globalization
higher education
internationalization
nation branding
South Korea
Opis:
This study focuses on the effect that internationalization of higher education has on the nation branding of South Korea. To better understand the role that international students in higher education play in nation branding, research is needed on the actual experiences of international students in the country. In this study, current and former African university students’ experiences living and studying in South Korea are investigated. This study, therefore, uses the nation branding framework within the context of South Korea and the role of higher education as an image enhancement strategy geared toward global public inclusion; its focus is on the experiences of African students. In order to obtain multiple perspectives on African student experiences, a survey was conducted using a questionnaire. The empirical evidence obtained in this study demonstrates that African students’ experiences in South Korea are relevant in their perceptions of the host country. The results suggest the positive impact that the South Korean government has on improving the country’s image through encouragement of internationalization of higher education, especially among African students who come to the country for their tertiary education.
Źródło:
The New Educational Review; 2016, 45; 52-63
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of and Prospects for Students’ Academic Performance in Polish History Education
Autorzy:
Kim, Yong-Deog
Lee, Jong-Oh
Kim, Jong-Suck
Powiązania:
https://bibliotekanauki.pl/articles/48527145.pdf
Data publikacji:
2012-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Polska
Korea
Polish history
Korean students
Department of Polish
Opis:
For this study, an evaluation tool focusing on the Polish history was developed to measure the academic performance of college students who major in the Polish language in Korea. The purpose of this study was to investigate the effects of the tool on students’ academic performance after applying it in a classroom setting. The tool consisted of three types of questions, which were administered before and after the application of the tool to 108 students taking a Polish history course. The results of the study serve as a foundation for revitalizing research on Poland and Polish language education, as well as for improving students’ academic performance.
Źródło:
The New Educational Review; 2012, 28; 61-72
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Fe Content on the Mechanical Properties and Thermal Conductivity of the Al-RE Alloys
Autorzy:
Yoo, Hyo-Sang
Kim, Yong-Ho
Son, Hyeon-Taek
Powiązania:
https://bibliotekanauki.pl/articles/356397.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum
extrusion
rare earth
thermal conductivity
mechanical property
Opis:
In this study, we investigated the effect of Fe addition (0, 0.25, 0.50 and 0.75 wt.%) on the microstructure, mechanical properties and electrical conductivity of as-cast and as-extruded Al-RE alloys. As the Fe element increased by 0 and 0.75wt.%, the phase fraction increased to 5.05, 5.76, 7.14 and 7.38 %. The increased intermetallic compound increased the driving force for recrystallization and grain refinement. The electrical conductivity of Al-1.0 wt.%RE alloy with Fe addition decreased to 60.29, 60.15, 59.58 and 59.13 % IACS. With an increase in the Fe content from 0 to 0.75 wt.% the ultimate tensile strength (UTS) of the alloy increased from 74.3 to 77.5 MPa. As the mechanical properties increase compared to the reduction of the electrical conductivity due to Fe element addition, it is considered to be suitable for fields requiring high electrical conductivity and strength.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 3; 1029-1033
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Flux on the Recovery Behavior of Valuable Metals during the Melting Process of Aluminum Can Scrap
Autorzy:
Han, Chulwoong
Kim, Yong Hwan
Kim, Dae-Geun
Lee, Man Seung
Powiązania:
https://bibliotekanauki.pl/articles/2048886.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum
can scrap
flux
gas bubbling filtration
GBF
recycling
Opis:
This study investigated the effect of flux type and amounts on recovery behavior of aluminum alloy during the melting process of Al can scrap. The heat treatment was conducted to remove the coating layer on the surface of can scrap at 500°C for 30 min. The molten metal treatment of the scrap was performed at 750°C in a high-frequency induction furnace with different flux types and amounts. It was observed that the optimum condition for recovery of Al alloy was to add about 3 wt.% flux with a salt and MgCl2 mixing ratio of 70:30 during melting process. The mechanical properties of recovered Al alloy were about 254.8 mPa, which is similar to that of the virgin Al5083 alloy.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 4; 1023-1027
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Densification and Magnetic Properties of Fe Powder Compacts According to Heat-Treatment Conditions
Autorzy:
Yoo, Hyo-Sang
Kim, Yong-Ho
Kim, Cheol-Woo
Son, Hyeon-Taek
Powiązania:
https://bibliotekanauki.pl/articles/2203721.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Fe powder
heat-treatment
microstructure
density
Opis:
In this study, the effects of heat-treatment conditions of Fe powder compacts on densification, microstructure, strength and magnetic properties were investigated. The prepared Fe powder was compressed in a mold of diameter 20 mm at a pressure of 800 MPa for 30 sec. This Fe powder compact was heat-treated under different atmospheres (air and 90% Ar + 10% H2 and heat-treatment temperatures (300 and 700℃). The Fe powder compacts heat-treated in an Ar+H2 mixed gas atmosphere showed a denser microstructure and higher density than the Fe powder compacts heat-treated in an air atmosphere. Oxygen content in the heat-treatment conditions played a significant role in the improvement of the densification and magnetic properties.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 47--50
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Extrusion Temperature on Extrudability of Al-Zn-Cu Based Alloy
Autorzy:
Kim, Yong-Ho
Yoo, Hyo-Sang
Lee, Kyu-Seok
Lee, Sung-Ho
Son, Hyeon-Taek
Powiązania:
https://bibliotekanauki.pl/articles/354298.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum
extrusion
EBSD
mechanical property
Opis:
In this study, the extrusion characteristics of Al-2Zn-1Cu-0.5Mg-0.5RE alloys at 450, 500, and 550°C were investigated for the high formability of aluminum alloys. The melt was maintained at 720°C for 20 minutes, then poured into the mold at 200°C and hot-extruded with a 12 mm thickness bar at a ratio of 38:1. The average grain size was 175.5, 650.1, and 325.9 μm as the extrusion temperature increased to 450, 500 and 550°C, although the change of the phase fraction was not significant as the extrusion temperature increased. Cube texture increased with the increase of extrusion temperature to 450, 500 and 550°C. As the extrusion temperature increased, the electrical conductivity increased by 47.546, 47.592 and 47.725%IACS, and the tensile strength decreased to 92.6, 87.5, 81.4 MPa. Therefore, the extrusion temperature of Al extrusion specimen was investigated to study microstructure and mechanical properties.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1307-1310
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual Speed Laser Remelting for High Densification in H13 Tool Steel Metal 3D Printing
Autorzy:
Jung, Im Doo
Choe, Jungho
Yun, Jaecheol
Yang, Sangsun
Yang, Dong-Yeol
Kim, Yong-Jin
Yu, Ji-Hun
Powiązania:
https://bibliotekanauki.pl/articles/353737.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metal 3d printing
powder bed fusion
selective laser melting
H13 tool steel
remelting
Opis:
The densification behavior of H13 tool steel powder by dual speed laser scanning strategy have been characterized for selective laser melting process, one of powder bed fusion based metal 3d printing. Under limited given laser power, the laser re-melting increases the relative density and hardness of H13 tool steel with closing pores. The single melt-pool analysis shows that the pores are located on top area of melt pool when the scanning speed is over 400 mm/s while the low scanning speed of 200 mm/s generates pores beneath the melt pool in the form of keyhole mode with the high energy input from the laser. With the second laser scanning, the pores on top area of melt pools are efficiently closed with proper dual combination of scan speed. However pores located beneath the melt pools could not be removed by second laser scanning. When each layer of 3d printing are re-melted, the relative density and hardness are improved for most dual combination of scanning. Among the scan speed combination, the 600 mm/s by 400 mm/s leads to the highest relative density, 99.94% with hardness of 53.5 HRC. This densification characterization with H13 tool steel laser re-melting can be efficiently applied for tool steel component manufacturing via metal 3d printing.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 571-578
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Si Addition on Microstructure and Mechanical Properties of the Al Alloys with High Cr Content Prepared by Gas Atomization and SPS Processes
Autorzy:
Kim, Yong-Ho
Oh, Ik-Hyun
Yoo, Hyo-Sang
Park, Hyun-Kuk
Lee, Jung-Han
Son, Hyeon-Taek
Powiązania:
https://bibliotekanauki.pl/articles/354961.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Cr-Si
gas atomization
spark plasma sintering
powder
rapid solidification
Opis:
This research describes effects of Si addition on microstructure and mechanical properties of the Al-Cr based alloys prepared manufactured using gas atomization and SPS (Spark Plasma Sintering) processes. The Al-Cr-Si bulks with high Cr and Si content were produced successfully using SPS sintering process without crack and obtained fully dense specimens close to nearly 100% T. D. (Theoretical Density). Microstructure of the as-atomized Al-Cr-Si alloys with high contents of Cr and Si was composed multi-phases with hard and thermally stable such as Al13Cr4Si4, AlCrSi, Al8Cr5 and Cr3Si intermetallic compounds. The average hardness values were 703 Hv for S5, 698 Hv for S10 and 824 Hv for S20 alloy. Enhancement of hardness value was resulted from the formation of the multi-intermetallic compound with hard and thermally stable and fine microstructure by the addition of high Cr and Si using rapid solidification and SPS process.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 3; 1045-1049
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Recovery of Valuable Metals in Spent Lithium-Ion Batteries by Al2O3-SiO2-CaO-Fe2O3 Slag System
Autorzy:
Moon, Tae Boong
Han, Chulwoong
Hyun, Soong-Keun
Park, Sung Cheol
Son, Seong Ho
Lee, Man Seung
Kim, Yong Hwan
Powiązania:
https://bibliotekanauki.pl/articles/2049176.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
spent lithium-ion battery
smelting
Al2O3-SiO2-CaO-Fe2O3
recovery
slag
Opis:
This study investigated the recovery behavior of valuable metals (Co, Ni, Cu and Mn) in spent lithium ion-batteries based on Al2O3-SiO2-CaO-Fe2O3 slag system via DC submerged arc smelting process. The valuable metals were recovered by 93.9% at the 1250°C for 30 min on the 20 Al2O3-40SiO2-20Cao-20Fe2O3 (mass%) slag system. From the analysis of the slag by Fourier-transform infrared spectroscopy, it was considered that Fe2O2 and Al2O3 acted as basic oxides to depolymerize SiO4 and AlO4 under the addition of critical 20 mass% Fe2O3 in 20 Al2O3-40SiO2-Cao-Fe2O3 (Cao + Fe2O3 = 40 mass%). in addition, it was observed that the addition of Fe2O3 ranging between 20 and 30 mass% lowers the melting point of the slag system.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 4; 983-986
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 38

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