Materials Literature
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The existence of pathogenic bacteria and fungi on surfaces can be a serious threat to health causing numerous infections. With microorganisms developing antimicrobial resistance over the years, there is an increasing need to develop surfaces that can kill or inhibit the growth of bacteria and fungi. Antimicrobial coat…
We have studied the static and dynamic properties of liquid metal, namely Pd at thermodynamic state T=1853K within the scope of the orbital free ab-initio molecular dynamics (OF-AIMD) simulation technique. In this simulation process, electronic energy is calculated by using the Hohenberg-Kohn version of DFT. Here the…
Ultra-high performance concrete (UHPC) adalah beton dengan kekuatan dan daya tahan yang sangat baik. Penggunaan UHPC sebagai material infrastruktur dapat menghasilkan struktur lebih ramping. Tujuan penelitian ini adalah untuk menganalisis sifat mekanis beton berupa kuat tarik lentur. Pembuatan UHPC memerlukan semen ya…
Copper nanoparticles are one type of metal nanoparticles that have not been widely studied. Copper nanoparticles have some uniqueness that affects their optical, catalysis and conductive properties. In addition, nanoparticles can also be applied in the field of microbiology because of their antibacterial activity. Thi…
International audience
Aquifer remediation at a former refinery site, mainly contaminated by BTEX compounds, led to the removal of about 2400 tons of hydrocarbons e.g. 98% of the initial contamination by pumping, free product recovery and in situ bioremediation treatment. Due to risc assessment based on mass transfer and groundwater transpo…
Based on an internal energy concept an analytical approach is proposed to determine whether a pumped pipeline system needs surge protection during the loss of power to the pumping units and, if required, to calculate the additional energy that protects the system against the resulting transient pressures. The approach…
Detonation of HMX has been simulated using a multi-reaction chain and species equation-of-states. A reacting flow code capable of handling arbitrary number of reactions and species has been used. Computational results are compared to the results produced by a pressure-based single reaction model (AJEX) and a temperatu…
Evaluation of pipeline infrastructure system resilience requires an understanding of pipeline risk of failure. Current methods for pipeline risk assessment are largely deterministic, and as such, do not explicitly represent the effect of uncertainties in the critical parameters. This limits the understanding of which…
This paper provides a comparison of basic features of the three most popular numerical techniques that are utilized to solve differential equations, by computer software to conduct hydraulic surge analyses of liquid pipeline systems. These three numerical techniques are comprised of the method of characteristics (MOC)…
Fate of aircraft de-icing fluid (ADF) and propylene glycol when introduced into saturated soils was studied. Bacteria degraded the ADF primary constituent Propylene glycol (PG) and bio-growth significantly reduced hydraulic conductivity (K). Value of K dropped steadily by 1 to 3 orders of magnitude until reaching a st…
Abstract not provided.
Detergency is fundamentally a colloidal phenomenon, and it is also true that a researcher is confronted with the difficulty of the qualitative treatment of a detersive system because of the complicated and diversified soiling systems and complicated hydrodynamics in washing textiles. In Japan, the development of synth…
Energy consumption and efficient use are important factors of thermal systems. This work indicates numerical studies on surface radiation and the effects of natural convection on the heat transfer and flow field between two united cylinders united, using a radiation shield between them. This study reveals the physical…
The paper outlines a process undertaken to determine the need for cathodic protection (CP) on a new pipe installation. Coating breakdown over time was predicted based on CP design codes. Published data on corrosion of buried or immersed metal samples was reviewed to provide a correlation between ground water chemistry…
Background: Intrinsic discoloration of the tooth can be caused following trauma, loss of vitality, endodontic treatment, and restorative procedures apart from known local and systemic factors. Tooth bleaching, veneering or placement of a full coverage crown are treatment options for discolored tooth. Non-vital teeth t…
Optical absorption and emission of -Sn nanocrystals from first principles
Ferroelectrics In magnetic materials, magnetic dipoles typically line up parallel or antiparallel to each other. However, more complex orderings, such as helical, can also occur. Khalyavin et al. found that in the material BiCu0.1Mn6.9O12, a helical order can be formed out of electric rather than magnetic dipoles. The…
Nanoteknologi adalah teknologi terbaru yang sangat menjanjikan untuk masa depan yang memiliki banyak aplikasi potensial dan aktual pada perangkat nanoelektronik. Namun, untuk mendapatkan manfaat pada nanoteknologi diperlukan teknologi canggih itu sendiri. Masalah utama fabrikasi perangkat nanoelectronic adalah skalany…
Nanomaterials Transition metal carbides and nitrides are nonlayered materials that in monolayer form have potentially useful electronic and chemical properties. These monolayers are usually made by chemical etching that produces flakes with surface defects that have poor air and water stability. Hong et al. report tha…