Materials Literature
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Kayu yang bermutu baik dapat mengalami penurunan kualitas, terutama dari segi kekuatan kayu. Banyak hal yang menyebabkan berkurangnya kekuatan kayu, diantaranya lubang pada kayu. Maka dari itu timbullah suatu gagasan bagaimana cara meningkatkan kembali kualitas kayu yang sudah berkurang tersebut, dalam hal ini kuat le…
This chapter contains sections titled: Introduction Localization of a charge in an “ideally perfect” and pure polarizable medium Localization and trapping of carriers in a real material Detrapping Bibliography
Liner merupakan komponen yang sangat penting pada rawmill untuk proses pengecilan dimensi dan mixing material di industri semen. Rawmill IIIB Indarung IV PT.Semen Padang telah mengalami kegagalan pada komponen ini. Tipe material yang digunakan yaitu FEM A (1110 4 RI C) ialah baja austenitik paduan tinggi mangan (High…
In this paper, surface modification of the strut dowel used in ITER PF support is reported. Different ions (nitrogen/titanium) with different doses are implanted into the surface of strut dowel. The result of Auger Electron Spectroscopy (AES) indicates that nitrogen can be implanted more deeply than titanium under the…
Kerusakan yang terjadi pada kayu menyebabkan kekuatan kayu berkurang. Kerusakan tersebut salah satunya dapat berupa lubang yang disebabkan karena serangan serangga, jamur dan kesalahan manusia dalam pengerjaannya. Untuk meningkatkan kembali kekuatan kayu tersebut digunakan metode patching. Tujuan dari penelitian ini u…
Se presenta un sistema para el cálculo del decaimiento radiactivo de los isótopos empleados en la medicina nuclear con el objetivo de calcular, en cada momento de tiempo hasta su desintegración, el valor radiactivo de isótopos presentes en radiofármacos. Se utilizó la fórmula para el cálculo del decaimiento radiactivo…
Abstract : Multiple sclerosis (MS) is an inflammatory-mediated demyelinating disease of the human CNS. The clinical disease course is variable and starts with reversible episodes of neurological disability (remitting relapsing (RR-MS) stage). This transforms into a disease of continuous and irreversible neurological d…
Environmental durability, ageing and corrosion tests are applied before a product comes to the market to ensure that the product's life time behaviour is well established. Current tests demand a long period of weeks - months before safe results can be concluded based on the procedures described and implemented so far.…
The structures of the lead-free perovskites in the solid solution range \n(KxNa1-x)0.5Bi0.5TiO3 (KNBT100x) have been investigated using high-resolution x-ray \ndiffraction (XRD) on polycrystalline samples. The room-temperature structure of \nNa0.5Bi0.5TiO3 (NBT) has been studied, and identified as having monoclinic Cc…
ABSTRACT: The NO removal over oxide sorbents (K2O/Al2O3, CaO/Al2O3 and BaO/Al2O3) at a loading of up to 25 wt. % was investigated using a synthetic diesel exhaust gas containing 1,000 ppm NO, 1000 ppm iso-butane (i-C4H10), 8 % O2 and N2 balance. The reactor was operated at 250 oC to 450 oC for the activity study. NO w…
ENGLISH ABSTRACT: Impact Polypropylene Copolymers (IPCs) are extremely complex materials, consisting of a mixture of polypropylene homopolymer and copolymers having different comonomer (ethylene) contents and chemical composition distributions. IPC can only be effectively analysed by multidimensional analytical approa…
摘要： 用水热法合成了过渡金属联吡啶配阳离子硅钨杂多酸：[M(2,2′-bpy)2]2SiW12O40(M=Mn(1)和M=Co(2)），采用红外光谱、元素分析、热重和单晶X射线衍射对其进行了表征。 结果表明，化合物1和2是异质同构体，具有二维格子框架结构。 初步研究了2种化合物的电催化H2O析出O2性能，发现化合物1对电催化H2O析出O2有一定的催化作用。
This paper is focused on giving an alternative compensation scheme for wave reflections in long cable AC drives interconnections. In our previous works, e.g., [ORT 04, RIN 05c], we presented a framework for the design of feed-back controllers (without prior knowledge of the load parameters) acting on a hybrid active f…
Ethanol is a promissing chemical fuel as an in situ source of energy generation for lowtemperature fuel cells application (25 ºC).However, due to the dominance of the paralell reaction pathway, the development of direct ethanol fuel cells (DEFC) has been impeded by the low activity of existing electrocatalysts for oxi…
Beton ringan struktural dapat diproduksi dengan menggunakan agregat ringan alami salah satunya adalah pumice. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan kandungan semen dalam campuran beton ringan terhadap kuat tekan beton ringan. Dalam penelitian ini metode yang digunakan adalah metode eksperimen. V…
Pada penelitian ini, dilakukan analisa perbandingan pada kekuatan pressure vessel compressed natural gas. Pressure vessel yang digunakan yaitu tipe satu dan tipe tiga, tipe satu adalah tabung menggunakan material logam yaitu Carbon Steel SA 516 Grade 70 dan Aluminium Alloy T6-6061. Pada tabung tipe tiga material mengg…
L’omogeneizzazione termica e chimica dei lingotti e un tema di rilevante interesse per garantire uniformita nelle caratteristiche meccaniche finali dei prodotti forgiati. L’obiettivo del presente studio e quello di controllare i parametri fisici di riscaldo dei lingotti per comprendere se il ciclo termico sia adeguato…
Multi-walled carbon nanotubes (MWCNTs) were synthesized using catalytic chemical vapor deposition (CVD) method. Oxygen plasma treatment was applied to modify surface state of the CNTs synthesized for improvement of field emission performance. Surface state of the plasma treated CNTs was studied by X-ray photoelectron…
This chapter contains sections titled: Introduction Space environment The thermal control of space vehicles Electrostatic phenomena in materials Conclusion Bibliography
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