A comparison of LII analysis results from numerical model and experiment at elevated surrounding pressures

With environmental concerns over emitted particulate matters(PM) from combustion systems, various researches have been conducted on reduction and measurement techniques of particulate matters. The LII analysis results from numerical models and experiments in an ethylene/air laminar diffusion flame at elevated pressure up to 2.0 MPa with laser fluence 0.07 J/cm², detection wavelength 400 nm were compared to validate a modified LII numerical model. The lifetime of the LII signal decreased as the elevated pressure increased, so that LII decay time also decreased in both results. In the aspect of heat transfer mechanism, it becomes earlier that dominant conduction starts. This shows that the results matched well under the pressure conditions. It is concluded that the LII numerical model could be applied to decide particle size in TIRE-LII at the high-pressure condition.     

Green‐Function Calculations of Coherent Electron Transport in a Gated Si Nanowire

We describe a detailed numerical scheme to calculate electron transport in quantum wires using the Green function formalism combined with tight‐binding orbital basis. As an example of the application, we study the electron transport in a Si nanowire containing a finite potential barrier. The effects of nonzero bias, temperature, and disorder on the barrier‐induced oscillatory conductance are investigated within the context of coherent transport model. The oscillatory behavior of the conductance as a function of the Fermi energy is found to be highly sensitive to sample disorder and limited to a very low temperature and a small bias range.     

Synthesis and structural properties of lithium titanium oxide powder as-synthesized by two step calcination process

A two-step calcination synthesis, considering the potential for mass production, of lithium titanium oxide powder was carried out to fabricate a single Li₄Ti₅O₁₂ phase, which is useful for anode electrode material of Li-based rechargeable battery as well as an electrode for supercapacitor. The final composition is controlled by adding more TiO₂ powder into powder gained at one calcination process during the two calcination process. We investigated the influence of excess TiO₂ on the structural characteristics of lithium titanium oxide synthesized by the two-step calcination method. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) measurements showed that the as-synthesized powder had a spinel crystal structure as well as A composition of 4: 5: 12. In addition, a high resolution transmission electron microscopy (HRTEM) analysis revealed that the fabricated powder exhibited a single crystalline phase formation. These results indicated that the powder synthesized in the one-step calcination process showed coexistence crystalline phases, which are the Li₄Ti₅O₁₂ and Li_2.39Ti_3.4O₈ phase. However, in the two-step calcination process, the powder synthesized showed the single crystalline Li₄Ti₅O₁₂ phase. A very uniform grain size of the as-synthesized powder was shown in a field emission scanning electron microscopy (FESEM). These results suggested that the two-step calcination process can be used for synthesis of single crystalline Li₄Ti₅O₁₂ powder with uniform grain shape and provide motivation to pursue mass production of lithium titanium based oxide powder for bulk type batteries.     

On Fundamental Limitations of Proving Data Theft

We show software agents that operate on input plaintext, transmit the result, and have the property that characterizes the operation as theft of plaintext amounts to solving a hard cryptographic problem. Such agents employ what we call a "questionable encryption scheme" in which it is computationally intractable to determine if the output is an asymmetric ciphertext or nonce. We therefore show a fundamental computational limitation of information forensics     

Comment—a note on expert systems packaging expertise on a disk

Many packaging decisions are routine, but require a high level of expertise. The research described in this paper explores the use of expert systems for automating routine package development tasks. It begins with a general discussion of expert systems and outlines some feasible packaging applications in design, prediction, problem diagnosis, and management control. A PC-based prototype system is described, which is composed of six modules related to the following tasks: performance requirements, packaging solutions, testing specifications, testing results analysis, vendor specifications and procurement.     

On-line monitoring system development for single-phase flow accelerated corrosion

Aged nuclear piping has been reported to undergo corrosion-induced accelerated failures, often without giving signatures to current inspection campaigns. Therefore, we need diverse sensors which can cover a wide area in an on-line application. We suggest an integrated approach to monitor the flow accelerated corrosion (FAC) susceptible piping. Since FAC is a combined phenomenon, we need to monitor as many parameters as possible and that cover wide area, since we do not know where the FAC occurs. For this purpose, we introduce the wearing rate model which focuses on the electrochemical parameters. Using this model, we can predict the wearing rate and then compare testing results. Through analysis we identified feasibility and then developed electrochemical sensors for high temperature application; we also introduced a mechanical monitoring system which is still under development. To support the validation of the monitored results, we adopted high temperature ultrasonic transducer (UT), which shows good resolution in the testing environment. As such, all the monitored results can be compared in terms of thickness. Our validation tests demonstrated the feasibility of sensors. To support direct thickness measurement for a wide-area, the direct current potential drop (DCPD) method will be researched to integrate into the developed framework.     

Parallel processing of the sex and familiarity of faces.

78 undergraduates were asked to rate photographs of faces as male or female and familiar or unfamiliar under a total of 4 conditions in 2 experiments. Results from Exp I indicate that faces whose sex was difficult to classify were no harder to judge as familiar than those whose sex was easy to classify. In Exp II this result was replicated and extended to a situation where the familiarity judgment was contingent on the sex judgment. Findings support the view that analyses of the face's sex and its identity proceed in parallel, rather than in hierarchical, order as claimed by H. Ellis (1986). (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved)