Materials Literature
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Abstract After data collection and entry, survey data need to be prepared for analysis and analyzed. The data preparation stage involves three important components: data formatting, data editing, and computation of survey weights. The data analysis stage involves the choice of relevant statistical tools according to t…
Yttria stabilised tetragonal zirconia polycrystal (Y-TZP) ceramics have attracted particular attention in medical applications due to their outstanding mechanical properties. In particular they have increased toughness compared to other ceramics such as alumina. Transformation toughened zirconia has the highest fractu…
Proses quenching adalah proses pendinginan cepat yang dialami oleh logam yang telah mengalami pemanasan diatas temperature kritis untuk memperoleh peningkatan kekuatan dan kekerasan. Dalam proses quenching, logam mengalami tiga tahapan pendinginan yaitu tahap selimut uap, tahap pendidihan dan tahap pendinginan. Peneli…
NASAs Orbital Debris Engineering Model was designed to calculate orbital debris fluxes on spacecraft in order to assess collision risk. The newest of these models, ORDEM 3.0, has a number of features not present in previous models. One of the most important is that the populations and fluxes are now broken out into ma…
Homogeneous charge compression ignition engines have the potential for low emissions and better efficiency. This benefit is due to its low temperature constant volume combustion where the diesel cycle moves closer to Otto cycle for the same compression ratio. Numerical investigations are carried out on a direct inject…
In this work, we explore the ability of plasma assisted chemical vapor deposition (PACVD) operating under high power densities to produce thin high-quality diamond layers with a controlled doping with negatively-charged nitrogen-vacancy (NV-) centers. This luminescent defect possesses specific physical characteristics…
Finding an accurate ab initio approach for calculating the electronic properties of transition metal oxides has been a problem for several decades. In this paper, we investigate the electronic structure of the transition metal monoxides MnO, CoO, and NiO in their undistorted rock-salt structure within a fully iterated…
Pediastrum and other representatives of the green algae family Hydrodictyaceae (Chlorophyta), commonly found in freshwater environments, are potential bioindicators for paleolimnological studies as they are preserved in sediments and morphologically classified as non-pollen palynomorphs obtained along with pollen spec…
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Abstract. The present study attempts to employ K release parameters to identify soil quality degradation due to changed land use pattern in sweetpotato (Ipomoea batatas (L.) Lam) gardens of Highlands of Papua New Guinea. Soils with widely differing exchangeable and non-exchangeable K contents were successively extract…
I consider a special atomic scattering problem where the target atom has distinct "soft" and "hard" excitation modes. I demonstrate that in this problem the integration out of "short-distance" (or "high-energy") physics may occur automatically in the regular perturbative calculations, i.e., it may occur without any cu…
Die Clusterbildungsprozesse in abgeschrecktem reinem Al, Al-Mg und Al-Si, sowie in reinen oder Cu/Ge-haltigen Al-Mg-Si-Legierungen wurden während der Kaltauslagerung mittels Positronen-Lebensdauer-Spektroskopie, Dopplerverbreiterungs-Spektroskopie sowie Thermoanalyse (DSC) untersucht. In reinem Al, Al-Mg- und Al-Si-Le…
This thesis was carried out in the frame of the BIOCOR ITN European project, in close collaboration with the industrial partner RSE S.p.A. (Italy). Copper alloys commonly used in cooling systems of power plants may be affected by biocorrosion induced by biofilm formation. The main objective of this work was to study t…
The widespread use of engineered nanomaterials (ENMs) in a variety of technologies and consumer products inevitably causes their release into aquatic environments and final deposition into the oceans. In addition, a growing number of ENM products are being developed specifically for marine applications, such as antifo…
We demonstrate the expansion and collapse of surface-grafted zwitterionic polymer brushes in water caused by the addition of urea. We hypothesize that at low urea concentrations, this is an effect of an ion–dipole interaction between urea and the polymer, and at high urea concentrations, an effect of a change in water…
Purpose. Relevant to the bridges, which are operated, is to determine the actual parameters of natural modes, which actually allow the identification of the design as a dynamic system. It is proposed to determine these parameters for the results of dynamic tests to analyze them in the developed computational and analy…
Concerns on corrosion and effective coating protection of double hull tankers and bulk carriers in service have been raised especially in water ballast tanks (WBTs). Test protocols/methodologies specifically that which is incorporated in the International Maritime Organisation (IMO), Performance Standard for Protectiv…
The crystallization behavior and intriguing crystal morphologies of double crystalline poly( p -dioxanone)-poly(tetramethylene ether)glycol (PPDO–PTMEG) multiblock co-polymers were investigated via differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and transmission electron microscopy (TEM).…
The risk of pipeline failure is a measure of the state of knowledge of the pipeline; improved knowledge of the pipeline reduces the uncertainty and therefore can reduce the associated risk. Specifically for corrosion defects, the knowledge of the number and size of defects is often obtained using in-line inspection to…
Abstract For assessing fire loads in industrial buildings it is essential to quantify the burning behavior of materials as accurate as adequate. There for the combustion efficiency is used. To determine the combustion efficiency required energies and energy rates can be measured via Cone Calorimeter. Exemplified by tw…