Materials Literature
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This article discusses the fundamentals of motor protection principle. A brief overview of the existing protection philosophy for asynchronous motors is reviewed with a special consideration of thermal protection of motors. Because large synchronous motors are used in the cement industry, a review of additional functi…
Due to the electrical, sensory and optical properties the interest on ZnO-based devices including thin-film transistors (TFT) aroused. The main concerns, when using ZnO nanoparticles (NP-ZnO) in TFT, are the low charge carrier mobility and the hysteresis when poly(4-vinylphenol) (PVP) is used as gate dielectric. It is…
Structural and magnetic measurements were done on polycrystalline manganite, Pr0.5Eu0.5MnO3. The Rietveld refinement of the x-ray powder diffraction pattern at room temperature suggests considerable Jahn-Teller distortion due to ionic size mismatch of the isovalent ions. Dc and ac magnetometry suggest a disordered ant…
Polymeric bicontinuous microemulsions (BμE), found in well-designed ternary blends of two homopolymers and a diblock copolymer, have been extensively studied in the bulk, for example, as versatile templates for the synthesis of nanoporous materials. However, there have been few reports regarding BμE-forming blends as…
Several species of diatoms prominent in the sea-ice flora of McMurdo Sound, Antarctica, have been shown to possess an extreme capacity for shade adaptation and to be obligately psychrophilic in their temperature responses. Their capacities for growth and their photosynthetic activities as well as their pigment composi…
In this work, the surface of silicon etched by sulphur hexafluoride (SF6) and carbon tetrafluoride (CF4) plasma jet, pure or mixed with oxygen gas (O2), was investigated by scanning electron microscope (SEM), optical perfilometry and x-ray photoelectron spectroscopy (XPS). Through these techniques it was possible to i…
Water is not only by far the most important liquid in nature but also the one with the most puzzling behavior. Its density decreases upon cooling below 4 ◦C and the compressibility and specific heat increase anomalously by cooling. Water has also unusually high boiling, freezing and critical points and also a very hig…
ETFE막재는 PTFE막재에 비해 상대적으로 두께가 매우 얇고 유연하기 때문에 다양한 온도환경에 따른 막재의 재료특성을 알아볼 필요가 있다. 본 논문에서는 ETFE 막재에 대해 다양한 온도하에서의 재료특성 실험을 수행하였다. 첫째로, -20 $^{\circ}C$ , 0 $^{\circ}C$ , +20 $^{\circ}C$ , +40 $^{\circ}C$ 하에서 각각 5 시험편을 이용하여 인장실험을 수행하였으며, 각 온도하에서의 항복응력, 인장강도, 영계수를 도출하였다. 두 번째는, 25 $^{\circ}C$ , 40 $^{\circ}C$ , 60 $^{\circ}C…
This chapter discusses magnetic field gradients and spin isochromats, and introduces their phase evolution under magnetic field gradients using the ideas of the magnetization helix and k-space, thus leading to a description of Magnetic Resonance Imaging and selective excitation. Translational motion encoding using var…
C-axis oriented YBa2Cu3O7-δ (YBCO) nanowires have been fabricated so as to connect two c-axis oriented semi-ring-shaped YBCO thin films along the c-axis direction. This allows the characterization of high-Tc nanowires with the electrodes being of the same material. Four different lengths of the nanowire arrays were ch…
GaAs etch characteristics like etch rate, etch profile sidewall angle, etch surface morphology and selectivity are studied as a function of Inductively Coupled Plasma (ICP) power and Cl 2 /BCl 3 flow rate ratio in ICP at low pressure (<15mTorr) and low RF bias power (<100W) regime to achieve moderate GaAs etch rate wi…
Gastritis represents an inflammation of the stomach lining in response to injury. It is either acute or chronic, and has many underlying causes which can be diagnosed and classified histologically where endoscopic appearances such as redness are often misleading. Gastritis is seldom if ever symptomatic, but usually ha…
Abstract The mechanism of formation of initial condensate droplets for dropwise condensation in the nanometer scale is still undetermined. In this paper, magnesium was used as the condensation surface since it can react with condensate to produce magnesium hydroxide, which can be regarded as the marker of the initial…
This paper is about the study of catalytic effect of nanolayered montmorillonite- (MMT-) based organoclays (OCs) in epoxy polymer by directly monitoring their exothermic temperature versus time during curing. Untreated clays (UCs) of MMT were also filled in the epoxy polymer for comparative study. OCs and UCs were ind…
In this work, we investigated structural, electrical, and magnetic properties of ferroelectric PbZr0.2Ti0.8O3 (PZT) and ferrimagnetic/ferroelectric [CoFe2O4(CFO)/PZT] bilayers grown on (100)LaAlO3 (LAO) substrates supplied with bottom 50 nm thick LaNiO3 electrodes. Interestingly, structural and electrical properties o…
Abstract Eine neue Methode zur modellbasierten Optimierung der zeitabhängigen Harnstoffdosierung für SCR‐Katalysatoren (Selective Catalytic Reduction) wird präsentiert. Es werden Dosierprofile für zwei verschiedene Katalysatoren (Fe‐ und Cu‐Zeolith) berechnet. Dabei zeigt sich, dass die relative Leistungsfähigkeit der…
Summary: The objective was to define the mechanism of the growth inhibition of active hexose correlated compound (AHCC) alone and evaluate its activity in combination with pegylated liposomal doxorubicin (PLD). Scientific Methods: In vitro growth inhibition assays were completed with AHCC alone and in combination with…
This work describes a novel bearingless slice motor concept. Being the first bearingless slice motor without permanent magnets in the rotor but in the stator, this magnetically suspended drive system is most suitable for disposable devices in the biomedical, chemical or food industry. Due to the fact that the rotor ho…
Potential-pH Diagrams for Oxidation-State Control of Nanoparticles Synthesized via Chemical Reduction
In the present work, thermodynamic study of adsorption of Amaranth dye on to steam activated pigmented carbon prepared from ricehusk (B.N. ORYZA SATIVA) was investigated The adsorbent was investigated under variable system parameters, such as intra particlediffusion and temperature. The results of the present study ha…