Materials Literature
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To improve stability and confinement in fusion plasmas via sufficient control of the plasma current profile represents a major objective for the progress of thermonuclear fusion research based on the tokamak concept.The lower hybrid current drive (LHCD) would provide a solution, by removing the problematic extrapolati…
Manganese-based octahedral molecular sieves of the type K-OMS-2 (cryptomelane structure) were prepared either by synproportionation of KMnO4 and Mn 2+sulfate salts, in acidic aqueous suspension (reflux method) and or by the reduction of Mn+7 using benzyl alcohol and CTAB (as template) in neutral medium. The prepared K…
Single atom chemically doped graphene has been theoretically studied by density functional theory. The largest band gap, 0.62 eV, appears in arsenic atom doped graphene, then 0.60 eV comes by the tin atom, whose deformations can neither be ignored. It is also found that oxygen and iron single atom embedded graphene ca…
En este trabajo se plantea una metodología para generar las condiciones óptimas para excitar en general los modos de superficie en las polarizaciones P y S en un sistema vidrio - metamaterial - aire (configuración de Kretschmann) . Para ello s e calculan las relaciones de dispersión electromagnética que de riv an de r…
Telah dilakukan penelitian penggunaan komposit Karboksimetil Kitosan (KMK) dan fraksi amilosa sebagai inhibitor korosi pada baja lunak dalam media HCl 1 M. Penentuan efisiensi inhibisi korosi dilakukan dengan menggunakan metode gravimetri dan karakterisasi dipelajari berdasarkan foto morfologi permukaan baja menggunak…
The development of H-mode scenarios in JET with ITER-like wall (ILW) has indicated the need of understanding and controlling W accumulation, which hinders the attainment of good confinement for long durations [1,2]. This paper presents experimental results, interpretative modeling and theory predictions of W transport…
Wafer-scale SiO2photonic crystal(PhC)patterns(SiO2air-hole PhC,SiO2-pillar PhC)on indium tin oxide(ITO)layer of GaN-based light-emitting diode(LED)are fabricated via novel nanospherical-lens lithography.Nanoscale polystyrene spheres are self-assembled into a hexagonal closed-packed monolayer array acting as convex len…
Peneltian ini bertujuan menganalisis spektrum Fourier Transform Infra Red (FTIR) dan menentukan minimum loss dari kaca Tellurite-Bismuth-Zinc-Plumbum (TBZP) yang dipengaruhi oleh variasi (PbO). Kaca TBZP difabrikasi dengan teknik melt quenching dengan komposisi 55TeO2–2Bi2O3–[43-x]ZnO–xPbO (%mol) dengan x=2, 3, 4, 5.…
Fundamental understanding on microscopic physical changes of plant materials is vital to optimize product quality and processing techniques, particularly in food engineering. Although grid-based numerical modelling can assist in this regard, it becomes quite challenging to overcome the inherited complexities of these…
"El objetivo principal de esta investigación fue la obtención de ácido láctico por fermentación del mosto del fruto de cují (prosopis juliflora) y su posterior poli-condensación con zinc metálico a poli (ácido láctico) (PLA). Se determinó que a temperaturas entre el rango de 34 a 40 ºC, pH de 4 a 5 y 14 ºBrix se tiene…
Les couches minces de Cu 2 ZnSnS 4 (CZTS) ont ete preparees par voie chimique sol-gel et deposees sur des substrats de verre par la technique de spin coating. La solution de depot a ete faite a partir des sels de metaux de chlorure de cuivre (II) (CuCl 2 ), chlorure de zinc (II) (ZnCl 2 ), chlorure d’etain (IV) (SnCl…
In this study, poly(3-hexylthiophene):[6,6]-phenyl C61-butyric acid methylester (P3HT:PCBM) organic photovoltaic (OPV) devices, with ZnO nanoparticles buffer layer between the photoactive layer (P3HT:PCBM) and the cathode (Al top electrode), were fabricated. The active layer were annealed at 140 o C before depositing…
Direct decomposition of NO to N2 and O2 would in principle constitute the most attractive solution to remove NOx since it does not require the use of a reducing agent. The main limitation to the application of this reaction is the slow kinetics. Indeed, the Cu-ZSM5, the only catalyst able to activate the NO decomposit…
Abstrak Pada saat ini BATAN tengah menyusun konseptual desain reaktor gas temperatur tinggi untuk kogenerasi dengan daya 200MWt yang dinamakan RGTT200K.Reaktor ini menggunakan solid material grafit sebagai moderator dan bahan bakar berpengayaan rendah LEU-TRISO ( Low Enriched Uranium - TripleCoated Isotropic ), bahan…
Modification of chitosan by p-t-butylcalix[4]arenes has been conducted using a nucleophilic subtitution reaction between chitosan, p-t-butylcalix[4]arenes and N,N-diisopropyl carbodiimide (DIC) in reagent dichlorometane at room temperature and under nitrogen atmosphere. Analysis structure of the chitosan-p-t-butylcali…
The uncontrolled release of radioactive fission products from the primary circuit of a nuclear power reactor, described as “release source term”, is one of the major criteria for assessing a severe nuclear accident. A large number of tests were carried out under the European Commission (EC) Framework Programmes to imp…
A variety of concepts have been suggested to explain material failure attributed to hydrogen embrittlement. They are often based on empirical observations and can hardly be transferred to novel material systems. Using ab initio methods we can put the understanding of hydrogen embrittlement on a firm physical basis. We…
Grain bulk is anisotropic for airflow through it, thus having different resistance to airflow through grain beds in horizontal and vertical directions. In the present study, a three-dimensional finite element model that can predict the air pressure patterns in canola was developed. A modified form of Darcy's lawfor fl…
An auto-stereoscopic three-dimensional(3D)display method with the narrow structure pitch and high dense viewpoints is presented.Normally,the number of views is proportional to the structure pitch of the lenticular lens array.Increasing the density of views will decrease the spatial display resolution.Here a lenticular…
Biologically active compounds obtained from the medicinal plants are the effective chemotherapeutic agents and offering a broad spectrum of activity with greater emphasis on preventive action. The present study was aimed at evaluating the antimicrobial activities of crude methanolic extract of Oligochaeta ramose ( Ast…