Hubungan Antara Emotionaldan Prokrastinasi Akademik dengan Flow Akademik

Pola kognitif dapat menciptakan prestasi belajar siswa dengan cara mengontrol emosi yang buruk menjadi emosi yang baik dan penundaan tugas tugas sekolah menjadi tepat waktu dalam mengumpulkan tugas. Hasil analisis regresi ganda untuk menguji hubungan antara emotional exhaustion dan prokrastinasi akademik dengan flow akademik diperoleh nilai F = 17.827, R = 0,362 dan p = 0,000, sehingga H0 ditolak. Hubungan antara emotional exhaustion dengan flow akademik dengan nilai r = -0,291 dan p = 0,000 , jadi ada hubungan negatif anatara emotional exhaustion dengan flow akademik. Hubungan antara prokrastinasi akademik dengan flow akademik nilai r = -0,339 dan p = 0,000, jadi ada hubungan negatif anatara prokrastinasi akademik dengan flow akademik. Hasil penelitian nampak bahwa dari 3 ( tiga ) aspek flow akademik, tidak semua aspek memiliki korelasi negatif dengan emotional exhaustion dan prokrastinasi akademik, yaitu aspek intrinsik motivation memiliki korelasi positif dengan emotional exhaustion dan prokrastinasi akademik. Sumbangan efektif emotional exhaustion dan prokrastinasi akademik dengan flow akademik sangat kecil yaitu 0,131 atau 13.1 %. Dengan demikian 86,9% flow akademik ditentukan oleh variabel lain diluar emotional exhaustion dan prokrastinasi.akademik

Dye-sensitized solar cell with a pairof carbon-based electrodes

Cataloged from PDF version of article.We have fabricated a dye-sensitized solar cell (DSSC) with a pair of carbon-based electrodes using a transparent, conductive carbon nanotubes (CNTs) film modified with ultra-thin titanium-sub-oxide (TiOx) as the working electrode and a bilayer of conductive CNTs and carbon black as the counter electrode. Without TiOx modification, the DSSC is almost nonfunctional whereas the power conversion efficiency (PCE) increases significantly when the working electrode is modified with TiOx. The performance of the cell could be further improved when the carbon black film was added on the counter electrode. The improved efficiency can be attributed to the inhibition of the mass recombination at the working electrode/electrolyte interface by TiOx and the acceleration of the electron transfer kinetics at the counter electrode by carbon black. The DSSC with a pair of carbon-based electrodes gives the PCE of 1.37%

Dye-sensitized solar cell with a titanium-oxide-modified carbon nanotube transparent electrode

Cataloged from PDF version of article.Transparent and conductive carbon-based materials are promising for window electrodes in solid-state optoelectronic devices. However, the catalytic activity to redox reaction limits their application as a working electrode in a liquid-type dye-sensitized solar cell (DSSC). In this letter, we propose and demonstrate a transparent carbon nanotubes (CNTs) film as the working electrode in a DSSC containing iodide/triiodide redox couples. This implementation is realized by inhibiting the charge-transfer kinetics at CNT/redox solution interface with an aid of thin titanium oxide film that facilitates the unidirectional flow of electrons in the cell without sacrificing the electrical and optical properties of CNT. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3610488

Carbon based conductive thin film : fabrication, properties and application

Transparent conductors are increasingly becoming important components in electronic devices due to the growing demand for devices such as LED, LCD, and touch screens. In particular, the common transparent conductor, Indium tin oxide (ITO), has become increasingly expensive due to limited supplies of the raw material, thus creating the need for an alternative to this material. Carbon nanotubes (CNT) were thoroughly studied in this research to determine if they could be the replacement material for ITO. In this research, two types of sample were used: CNT solution and CNT thin films. Three kinds of material property were investigated from the samples: electrical (conductivity), optical (raman spectra or UV-vis absorption spectra) and physical properties (morphology). The first investigation was dedicated to optimization of transparent conductive film fabrication method. The focus of the first investigation were on feedstock quality, composition formula, deposition methods and solutions properties. Afterwards, a study of the correlation between electrical property and optical property was carried out. Out of several reported mathematical models that could describe the correlation between conductivity and transmittance of conductive films, one model, namely the thin metallic film model was verified to be a suitable mathematical model for CNT films. That model could describe the behavior of CNT films well except in certain conditions where semiconducting nanotubes content in solution exceeds 90 %. Apart from that, a study on the effects of different metallic and semiconducting nanotube mixture was also presented, as it was believed previously that metallic semiconducting junctions are the crucial factor in CNT films, although our results proved otherwise. The next topic of investigation was on how to improve carbon nanotube films conductivity through doping, as the present state of carbon nanotube film conductivity is still far inferior compared to Indium Tin Oxide (ITO). A new doping mechanism and new doping agents were presented in this research. Acid treatment of carbon nanotubes, which was previously thought to be a chemical attachment or surfactant removal, proved to be a proton attachment instead. With that argument, a new dopant, the piranha mixture, was found to be a stronger dopant. Finally, after studying the film fabrication, investigating the film physics, improving the conductivity of CNT films by doping, and obtaining a highly conductive carbon nanotube films, these films were tested by some simple devices.DOCTOR OF PHILOSOPHY (MSE

Kepemimpinan dalam konperensi suatu pedoman pengembangan pimpinan pertemuan/ Estrada

IX, 90 hal.: 21 cm

Kepemimpinan dalam konperensi suatu pedoman pengembangan pimpinan pertemuan/ Estrada

IX, 90 hal.: 21 cm

Kepemimpinan dalam konperensi suatu pedoman pengembangan pimpinan pertemuan/ Estrada

IX, 90 hal.: 21 cm

Dye-sensitized solar cell with a pair of carbon-based electrodes

We have fabricated a dye-sensitized solar cell (DSSC) with a pair of carbon-based electrodes using a transparent, conductive carbon nanotubes (CNTs) film modified with ultra-thin titanium-sub-oxide (TiO x) as the working electrode and a bilayer of conductive CNTs and carbon black as the counter electrode. Without TiO x modification, the DSSC is almost nonfunctional whereas the power conversion efficiency (PCE) increases significantly when the working electrode is modified with TiO x. The performance of the cell could be further improved when the carbon black film was added on the counter electrode. The improved efficiency can be attributed to the inhibition of the mass recombination at the working electrode/electrolyte interface by TiO x and the acceleration of the electron transfer kinetics at the counter electrode by carbon black. The DSSC with a pair of carbon-based electrodes gives the PCE of 1.37%. © 2012 IOP Publishing Ltd

Patterning Colloidal Metal Nanoparticles for Controlled Growth of Carbon Nanotubes

status: publishe

Agromineral "salah satu alternatif pengganti pupuk buatan"

xv, 256 hlm. : Ilus. : Tab. : 25 cm