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771.

비디오 기반의 중재가 학습장애를 가진 학생의 자기조절학습 및 학습동기에 미치는 효과에 대한 고찰

허유성 한국학습장애학회 학습장애연구 31 Pages

한국학습장애학회 학습장애연구 2008, Vol.5 No.2 17 165-195 (31 pages)

허유성 저
...
- 6,000원
본 연구의 목적은 비디오를 활용한 중재가 학습장애를 가진 학생의 학습동기와 자기조절학습에 미치는 효과에 대한 선행연구를 분석하는 것이다. 최근 통합교육이 확대되어 일반학급에 배치되는 학생의 수가 증가하고 있다. 그러나 선행연구에 의하면, 학습장애를 가진 학생들을 위한 교수적 수정 혹은 적응적 교수법의 활용은 매우 제한적으로 수행되고 있는 것으로 나타났다. 이러한 상황에서 학습장애를 가진 학생들의 자기조절학습과 학습동기 여부는 성공적인 통합교육을 위한 주요한 요인이 된다. 비디오를 활용한 중재는...
772.

A Comparison of Three Bayesian Point Estimates for Cross-Classified Multiple Membership Growth Curve Modeling

Chung Hyewon, Jeon Hyeonjeong, Park Soyoung 한국교육학회 교육학연구 26 Pages

한국교육학회 교육학연구 2021, 59권 7호 7 167-192 (26 pages)

Chung Hyewon, Jeon Hyeonjeong, Park Soyoung 저
...
- 5,500원
of groups (30, 50, 100), average group size (20, 40), and non-pure hierarchical data rates (20%, 40%). Three Bayesian point estimates were compared: the posterior mean, the posterior median, and the posterior mode. With the inverse Wishart prior, the posterior mean estimates for the between-school variances in the intercept and slope were substantially overestimated with 50 groups or less, while the posterior mode estimates were substantially underestimated. The posterior median estimates were...
773.

A Simulation Study for Examining Roles of Sampling Weight in Multilevel Analysis with data from a Complex Survey Design

Jung Hyekyung, Park In-Yong 한국교육학회 교육학연구 21 Pages

한국교육학회 교육학연구 2021, 59권 7호 4 85-105 (21 pages)

Jung Hyekyung, Park In-Yong 저
...
- 5,000원
This study was motivated by the National Assessment of Educational Achievement (NAEA) involving a complex survey design for sampling. The goal of the study was to explore the benefit of weighted analysis in multilevel modeling. Large-scale data such as the NAEA data are often analyzed in multilevel analyses to reflect the nested data structure. A simulation study was conducted incorporating different conditions. Multilevel analysis results were compared without weights, with basic design...
774.

Developing Design Principles for Digital Textbooks in Korea

Hyung Mi Joo, Chang Woo Nam, Eun A Ka, Chong Uk Ahn 한국교육학회 교육학연구 23 Pages

한국교육학회 교육학연구 2015, 53권 3호 16 435-457 (23 pages)

Hyung Mi Joo, Chang Woo Nam, Eun A Ka, Chong Uk Ahn 저
...
- 5,200원
In Korea, digital textbooks has been developed from the 3rd grade to the 5th grade, and 7th grade primarily for the subject matters of Science, and Social Studies since 2013, and then been applied to schools since 2014. The purpose of this study was to develop the design principles for digital textbooks in Korea. The study employed the Delphi technique. The thirty experts answered questionnaires in three rounds. This study concluded that the design principles for digital textbook consist of 4...
775.

Nitrogen-doped carbon nanosheets from polyurethane foams and removal of Cr(VI)

Jiaqi Duan, Baohua Zhang, Huailin Fan, Wenzhong Shen, Shijie Qu 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2017, Vol.22 7 60-69 (10 pages)

Jiaqi Duan, Baohua Zhang, Huailin Fan, Wenzhong Shen, Shijie Qu 저
...
- 3,000원
Nitrogen-doped carbon nanosheets with a developed porous structure were prepared from polyurethane foams by hydrothermal carbonization following ZnCl2 chemical activation. Scanning electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, solid state 13C nuclear magnetic resonance (NMR) spectra and X-ray photoelectron spectroscopy were used to characterize the nitrogen-doped carbon nanosheet structure and composition. The removal of Cr(VI) by the N-doped carbon...
776.

Synthesis and characterization of carbon doped TiO₂ photocatalysts supported on stainless steel mesh by sol-gel method

JO. Tijani, OO. Fatoba, TC. Totito, WD. Roos, LF. Petrik 한국탄소학회 Carbon Letters 12 Pages

한국탄소학회 Carbon Letters 2017, Vol.22 6 48-59 (12 pages)

JO. Tijani, OO. Fatoba, TC. Totito, WD. Roos, LF. Petrik 저
...
- 4,100원
This study synthesized pure anatase carbon doped TiO₂ photocatalysts supported on a stainless steel mesh using a sol-gel solution of 8% polyacrylonitrile (PAN)/dimethylformamide (DMF)/TiCl₄. The influence of the pyrolysis temperature and holding time on the morphological characteristics, particle sizes and surface area of the prepared catalyst was investigated. The prepared catalysts were characterized by several analytical methods: high resolution scanning electron microscopy (HRSEM), energy...
777.

Kinetic and multi-parameter isotherm studies of picric acid removal from aqueous solutions by carboxylated multi-walled carbon nanotubes in the presence and absence of ultrasound

Soheila Gholitabar, Hasan Tahermansouri 한국탄소학회 Carbon Letters 11 Pages

한국탄소학회 Carbon Letters 2017, Vol.22 2 14-24 (11 pages)

Soheila Gholitabar, Hasan Tahermansouri 저
...
- 4,000원
Carboxylated multi-wall carbon nanotubes (MWCNTs-COOH) have been used as efficient adsorbents for the removal of picric acid from aqueous solutions under stirring and ultrasound conditions. Batch experiments were conducted to study the influence of the different parameters such as pH, amount of adsorbents, contact time and concentration of picric acid on the adsorption process. The kinetic data were fitted with pseudo-first order, pseudo-secondorder, Elovich and intra-particle diffusion models....
778.

Synthesize multi-walled carbon nanotubes via catalytic chemical vapour deposition method on Fe-Ni bimetallic catalyst supported on kaolin

Aliyu A, Abdulkareem AS, Kovo AS, Abubakre OK, Tijani JO, Kariim I 한국탄소학회 Carbon Letters 18 Pages

한국탄소학회 Carbon Letters 2017, Vol.21 5 33-50 (18 pages)

Aliyu A, Abdulkareem AS, Kovo AS, Abubakre OK, Tijani JO, Kariim I 저
...
- 4,700원
combined effects of the reaction temperature and acetylene flow rate predominantly influenced the MWCNT yield. The N2 adsorption (BET) and TGA analyses reveal high surface areas and thermally stable MWCNTs. The HRTEM/HRSEM micrographs confirm the formation of tangled MWCNTs with a particle size of less than 62 nm. The XRD patterns of the MWCNTs reveal the formation of a typical graphitized carbon. This study establishes the production of MWCNTs from a bi-metallic catalyst supported on kaolin.
779.

Effect of fiber-matrix adhesion on the fracture behavior of a carbon fiber reinforced thermoplastic-modified epoxy matrix

H.J. Carrillo-Escalante, A. ?lvarez-Castillo, A. Valadez-Gonz?lez, P. J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2016, Vol.19 6 47-56 (10 pages)

H.J. Carrillo-Escalante, A. ?lvarez-Castillo, A. Valadez-Gonz?lez, P. J. Herrera-Franco 저
...
- 3,000원
In this study, the fracture behavior of a thermoplastic-modified epoxy resin reinforced with continuous carbon fibers for two levels of fiber-matrix adhesion was performed. A carbon fiber with commercial sizing was used and also treated with a known silane, (3-glycidoxy propyl trimethoxysilane) coupling agent. Toughness was determined using the double cantilever test, together with surface analysis after failure using scanning electron microscope. The presence of polysulfone particles improved...
780.

Carbon rich fly ash and their nanostructures

Numan Salah, Sami S. Habib, Zishan H. Khan, Ahmed Alshahrie, Adnan Memic, Attieh A. Al-ghamdi 한국탄소학회 Carbon Letters 9 Pages

한국탄소학회 Carbon Letters 2016, Vol.19 3 23-31 (9 pages)

Numan Salah, Sami S. Habib, Zishan H. Khan, Ahmed Alshahrie, Adnan Memic, Attieh A. Al-ghamdi 저
...
- 3,000원
Carbon rich fly ash was recently reported to have compositions that are ideal for use as a precursor and catalyst for carbon nanotube growth. This fly ash powder is mostly composed of pure carbon, predominantly present as sp2. In this work, the effect of sonication time on the morphology and structural properties of carbon rich fly ash particles is reported. The obtained results show that ultrasound treatment is an effective tool for producing ultrafine particles/fragments with higher porosity,...

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