Materials Literature
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Pengaturan perilaku fisis dan mekanis suatu produk semakin diperlukan untuk meningkatkan aspek ekonomis dan unjuk kerjanya. Salah satu teknik aplikatif yang dapat dikerjakan adalah penggabungan material penyusun suatu produk dengan variasi jenis maupun posisinya. Penelitian ini bertujuan memodelkan dan membandingkan h…
Cellulose usage is essential in various industries mainly in paper industry, food industry, pharmaceutical and paint industry. Cellulose is mainly obtained from wood but the source is very limited in developed countries which cause the industries to find an alternative resource. Agricultural residue is the unconventio…
Equal channel angular pressing (ECAP) merupakan suatu proses penghalusan ukuran.butir, spesimen diberikan gaya regangan plastis secara menyeluruh. Penelitian ini bertujuan untuk mempelajari pengaruh jumlah laluan pada proses equal channel angular pressing (ECAP) terhadap sifat mampu bentuk pada aluminium. Batang alumi…
Sıralı küme örneklemesinde küme çapı arttıkça yığın ortalamasına ilişkin tahmin edicinin etkinliği artmaktadır. Ancak etkinliği arttırmak amacıyla, örnek seçim işleminde, küme çapı aynı kalmak üzere aşama sayısı arttırılarak, çeşitli çok aşamalı sıralı küme örneklemesi tasarımları önerilmiştir. Bu çalışmada, son yılla…
Building a nuclear power plant has always been one of the most risky investment decisions because of the very poor record of nuclear power plants being built to time and cost and being operated efficiently and cheaply. The economic record of South Africa’s existing nuclear plants at Koeberg is mediocre. Both plants to…
This paper presents the study on the production and characterization of Hydroxyl functional Multi-Walled Carbon Nanotube (MWCNT) reinforced Polyester composite. The main objective of this study is to optimize the weight percentage of MWCNT in the composite and the sonication time of the composite. To determine the opt…
Biomass fuels can be produce by widely available raw materials which is come from different sources and wide variety of forms. Co-gasification can reduce the cost of the feedstock and reduce the problems that occur in plant-operation due to the production of tar (Kumabe et al., 2006). For the pre-treatment of biomass,…
South Africa’s call for tenders for nuclear power plants failed because the costs were high and because the requirements to obtain funding were not politically acceptable. The response to this failure seemed to be that pursuing a wider range of technical options and partners would produce a cheaper and more readily fi…
ABSTRAK Muhammad Amfrudin. “PENGARUH JUMLAH SALURAN MASUK TERHADAP KETANGGUHAN, KEKERASAN, DAN STRUKTUR MIKRO PADA PENGECORAN PULLEY DARI BESI COR DENGAN CETAKAN PASIR”. Skripsi, Surakarta: Fakultas Keguruan dan Ilmu Pendidikan. Universitas Sebelas Maret Surakarta, Juni 2014. Tujuan penelitian ini adalah: (1) Mengetah…
This work is concerned with a study of dry sliding wear of Aluminum bace alloy of (Al-4%Cu) reinforcement by silicon carbide particles with different percentage (3, 6,9,12 wt %SiC). Composite materials prepared by stir casting method using vortex technique. The base alloy and composite materials samples were tested to…
Solubility is the process of dissolution of solid in liquid phase to give a homogenous system and is one of the important parameter to achieve desired concentration of drug in systemic circulation for pharmacological response. Dissolution rate of poorly water-soluble drugs is rate limiting step for its bioavailability…
The consumption of plastic materials has been increasing and the accumulation of plastic at the end of its life cycle has also increased on the earth. This causes a big waste disposal and pollution problem. Therefore, this motivated many researchers to conduct studies to produce a polymer which is biodegradable and en…
O estudo de novos materiais para a captura de CO2 aponta como uma opção, o uso de líquidos iônicos como solventes para absorção, pois são compostos nos quais o CO2 apresenta uma solubilidade preferencial. Imobilizar líquidos iônicos em materiais mesoporosos pode ser uma combinação mais vantajosa na captura seletiva. D…
p-tert-butylcalix[4]arene was synthesized with the condesation reaction of p-tert-butylphenol and formaldehyde in basic conditions and then has derivatized from the both of two hydroxyl position with chloride which is containing donor oxygen atoms. BODIPY compound (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) was synth…
Penelitian rambat retak pada poros pejal berbentuk silindris dilakukan dengan cara eksperimen, pengamatan kecepatan dan perilaku rambat retak setelah siklus beban berulang bending overload dilakukan dengan mengamati retak yang merambat pada permukaan specimen yang berbentuk poros pejal. Dari hasil penelitian ini diket…
Combustion synthesis in electrothermal explosion mode can be regarded as an efficient method to obtain new nanomaterials. Different starting mixtures of magnesium powder with various carbonates (Li2CO3, Na2CO3, CaCO3, FeCO3, (NH4)2CO3) were tried and the self-thermal reactions were carried out under both reactive (air…
Mn-doped TiO2nanocrystal photocatalysts were prepared by the sol-gel method using MnSO4·H2O as manganese source. The catalysts were characterized by XRD, SEM, EPR, UV-Vis, their photocatalytic activity for methylene blue (MB) degradation was investigated. The results showed that Mn was doped into the crystal lattice o…
Controlling the optical properties of semiconductors with an engineered surface plasmon nanocavity is of great importance for understanding the underlying physics and designing new nanoscale photonic devices including highly efficient photovoltaics. In this talk we will demonstrate highly enhanced absorption and also…
This report describes the air breakdown characteristics in plane-plane and sphere gap electrode configuration under lightning impulse. The breakdown in air (spark breakdown) is the transition of a non-sustaining discharge into a self�sustaining discharge. In electrical power system, high voltage power equipments are m…
In this paper, we report our models on electron emission frm graphene and metallic tips. For graphene, we will cover 3 types of emission: field emission, over-barrier photo-emission and thermionic emission. On each model, we will highlight the main difference as compared to the traditional models that were constructed…