Scheme-Based Alethic Realism: Agency,the Environment,and Truthmaking

This paper presents a position called Scheme-based Alethic Realism, which reconciles a realist position on the nature of truth with a pluralistic Kantian perspective that allows for multiple environments in which truthmaking relationships are established. We argue that truthmaking functions are constrained by a stable phenomenal world and a stable cognitive architecture. This account takes truth as normatively distinct from epistemic justification while relativizing the truth conditions of our statements to what we call Frameworks. The pluralistic aspect allows that these stable elements, while constraining representational and linguistic schemes, do not define a single framework for truthmaking relations. We strengthen this position by considering themes on situated rational agency from cognitive science and artificial intelligence, arguing that whatever enables or supports rational action within a particular environment must figure into some account of truth and truthmaking, and vice versa.     

Application of fuzzy logic controller to active power filters

In this paper, the way to use one of the most powerful problem-solving methodologies, fuzzy logic, to enhance the quality of the power system is described. To prove the power of fuzzy logic for the modeling of nonlinear systems, the modeling of active power filters with a fuzzy logic based control strategy is presented as a case study and its capability to reject reactive power eliminate current harmonic components is simulated by MATLAB. The advantages in using fuzzy logic as emphasized in the case study are its simple application to various types of systems, high performance, lower cost, and higher productivity.     

Thermodynamic Analysis of Some Industrial Applications with Variable Ambient Conditions

In this study, the general exergy balance equation of an open system is obtained based on the variable ambient temperature and pressure. Using this result, the mathematical equations regarding both the reversible work given to the system in the electric arc furnace used in steel production and the exergy loss in the rotary burner used in cement production are derived. In obtaining these equations, it is assumed that the ambient temperature has a sinusoidal variation. The effects of varying ambient parameters on calculated exergy values in industrial applications are discussed, and the obtained results are analyzed and demonstrated.     

Aerosol particle deposition and distribution in bifurcating ventilation ducts

The quantitative information gained from detailed studies of particle deposition in ducts is important, for example, to evaluate human exposure to particles within buildings, implement cleaning strategies for ventilation ducts and also understand particulate deposition in the respiratory tree. For this purpose, an experimental study for aerosol particles of diameters ranging from 8.1 to 23.2 microm was conducted in a curved bifurcating ventilation duct. At the bend segment of the duct, the particle size, bend angle, curvature ratio and Reynolds number affect aerosol deposition significantly. On the other hand, tests conducted on the bifurcating segments show that deposition increases with particle size and Reynolds number. Accumulation of particles occurs mainly around the bend segment and the ridge of carina of the bifurcation. In all segments of the duct models, particle deposition is found to be enhanced with increasing humidity which increases from 66 to 95% (i.e., close the saturation). A physical interpretation of the results obtained is also presented.     

Quench Sensitivity of an Al-7 Pct Si-0.6 Pct Mg Alloy: Characterization and Modeling

The quench sensitivity of a cast Al-7 wt pct Si-0.6 wt pct Mg alloy was characterized by tensile tests and scanning electron microscopy. Specimens were cooled from the solution treatment temperature following 58 different cooling paths including interrupted and delayed quenches. Analysis of the microstructure showed that quench precipitates were Mg₂Si (β), which nucleated heterogeneously on Si eutectic particles as well as in the aluminum matrix, presumably on dislocations. The quench sensitivity of the alloy’s yield strength was modeled by multiple C-curves, using an improved methodology for quench factor analysis. The three C-curves used in the model represented loss of solute by (1) diffusion of Si to eutectic particles, (2) precipitation of β on Si eutectic particles, and (3) precipitation of β in the matrix. The model yielded a R ² of 0.994 and a root-mean-square error (RMSE) of 7.4 MPa. The model and the implications of the results are discussed in the article. This article is based on a presentation made in the symposium entitled “Simulation of Aluminum Shape Casting Processing: From Design to Mechanical Properties,” which occurred March 12–16, 2006 during the TMS Spring Meeting in San Antonio, Texas, under the auspices of the Computational Materials Science and Engineering Committee, the Process Modeling, Analysis and Control Committee, the Solidification Committee, the Mechanical Behavior of Materials Committee, and the Light Metal Division/Aluminum Committee.     

Gradually tapered light pipes for illumination of LED projectors

Abstract— LEDs are totally different from classical light sources: they have a different shape, radiation pattern, driving requirements, etc. Therefore, the illumination engine, which determines the brightness and uniformity of the system, has to be redesigned for LED‐based projectors. A compact illumination system based on gradually tapered light pipes (GTLP) will be presented. The GTLP collects, reshapes, and uniformizes the light flux from the LED to illuminate the light‐valve uniformly. The design and the simulations have been completed. The result is a uniformly illuminated rectangular beam at the end of the pipe with an efficiency of 81.1%. Afterwards, the light pipe was fabricated, and the experimentally measured efficiency is 76.9%, which demonstrates a successful manufacturing process. Finally, two recycling techniques to enhance the brightness have been applied and these enhancements were experimentally observed.     

Corrélations «texture cristalline-propriétés mécaniques» des plâtres durcis. Étude préliminaire

Résumé Les auteurs analysent les différentes notions à considérer pour conduire une étude rigoureuse des corrélations entre texture cristalline et propriétés mécaniques des platres durcis. Ce sont: 1) les phénomènes découlant de la croissance cristalline proprement dite (mode de germination et de croissance, vitesse de croissance, taille et forme des cristaux, adhérence entre cristaux, croissance cristalline gênée); 2) l'influence de certains phénomènes extérieurs: intervention d'effets mécaniques, utilisation de modificateurs de prise et emploi d'adjuvants solides, phénomènes d'absorption, d'humidification, ou de dessication). Cette étude préliminaire est illustrée par des observations expérimentales de textures et d'évolutions de textures et de propriétés mécaniques en fonction de certains facteurs particuliers étudiés.

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Summary The authors analyze the different notions which have to be taken into account to lead a rigourous study of the correlations between the crystalline texture and the mechanical properties of hardened plasters. These notions are 1) the phenomena dealing with the crystal growth (process of nucleation and growth, rate of growth, size and form of crystals, adhesion between crystals, “bored” crystal growth) and 2) outside phenomena (mechanical effects, use of modifiers and solid additives, adsorption, humidification and drying process). This preliminary study is illustrated by experimental observations on textures and on texture and mechanical properties evolutions versus some particular factors.

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Communication à la III^e Réunion de la Commission ?Gypsum/Plaster? de la RILEM, Budapest, Hongrie, 9–10 Octobre 1974.     

Partial confounding and projective properties of Plackett–Burman designs

Screening experiments are typically used when attempting to identify a few active factors in a larger pool of potentially significant factors. In general, two‐level regular factorial designs are used, but Plackett–Burman (PB) designs provide a useful alternative. Although PB designs are run‐efficient, they confound the main effects with fractions of strings of two‐factor interactions, making the analysis difficult. However, recent discoveries regarding the projective properties of PB designs suggest that if only a few factors are active, the original design can be reduced to a full factorial, with additional trials frequently forming attractive patterns. In this paper, we show that there is a close relationship between the partial confounding in certain PB designs and their projective properties. With the aid of examples, we demonstrate how this relationship may help experimenters better appreciate the use of PB designs. Copyright © 2006 John Wiley & Sons, Ltd.     

基于医学图像内容的挖掘技术研究

该文以医学图像数据为背景,研究了医学图像挖掘技术,总结了医学图像挖掘的一般过程,并对基于医学图像内容的相似性检索、关联规则挖掘、分类挖掘和时间序列分析等理论和技术进行了探讨和分析。     

Resources for Turkish morphological processing

We present a set of language resources and tools—a morphological parser, a morphological disambiguator, and a text corpus—for exploiting Turkish morphology in natural language processing applications. The morphological parser is a state-of-the-art finite-state transducer-based implementation of Turkish morphology. The disambiguator is based on the averaged perceptron algorithm and has the best accuracy reported for Turkish in the literature. The text corpus has been compiled from the web and contains about 500 million tokens. This is the largest Turkish web corpus published.