Sound matters: Notes toward the analysis and design of sound in multimodal webtexts

In this essay, I draw from approaches in voice, music, theater, and film studies to examine four elements of sound: vocal delivery, music, special effects, and silence. Within this four-part schema, I discuss a variety of frameworks that I hope may serve as resources for those seeking to engage in both the analysis and production of sound in multimodal webtexts. Throughout the essay, I analyze several poetic Flash texts, and I consider the relationship of part-to-whole and whole-to-part when seeking to analyze and compose with multiple modes.     

Xylitol crystallization from culture media fermented by yeasts

Among sugar substitutes, an important role is played by xylitol, an aliphatic pentitol provided with some interesting properties which make it a high value product for pharmaceutical, odontological and food industries. Its production by biotechnological methods is based on fermentation of agro-industrial residues and could potentially compete with the traditional chemical way. However, crystallization is an important stage of xylitol production, since in many respects it determines the yield and quality of the target product. In the present work tests were made in order to determine the best conditions to clarify fermented media, which were then subjected to isothermal crystallization in the presence or in the absence of residual xylose and varying xylitol concentration as well as cooling temperature (−10 ≤ T_c ≤ 15 °C). Besides, the kinetics of xylitol crystallization from fermented solutions was investigated as function of the initial solution supersaturation and cooling temperature. The effect of the presence of residual xylose on the rate of crystallization was also evaluated. The best clarifying treatment was found to be 20 g l⁻¹ activated charcoal at room temperature for 1 h. The study of xylitol crystallization revealed the positive effect of the presence of residual xylose, which ensured a 1.6-fold increase in the crystallization yield (from 0.27 to 0.42).     

Predictors of support for doctoral programs in media information technologies

This study assesses interest in curricular development in new technologies among communication faculty, with a focus on doctoral-level programs. Diffusion of innovations theory explains both individual- and organizational-level factors that may account for adoption of innovations, including those stemming from new technologies. In the field of communication, media information technology programs represent an organizational-level innovation of clear importance but with uncertain faculty support, due to individual factors (e.g., interest area, age) and departmental constraints (e.g., lack of resources). In light of this, several research questions are advanced to address: (1) the current level of support for media information technology programs among communication faculty members and (2) predictors of faculty interest in having more media information technology programs. Data were collected through a random sample of faculty members who filled out a survey on the World Wide Web. Results indicate that media information technology programs are viewed by faculty as the most needed type of program in the field of communication. Findings from a logistic regression analysis also reveal several predictors of support for new technology programs, including male gender, support for organizational communication programs, support for programs focusing on mass communication, and the belief that multimedia teaching facilities are important. The implications of these findings are discussed, with an emphasis on their relevance to faculty working in communication and related fields.     

About the theoretical aspect of multiple light scattering: Silvy's theory

The general problem of light scattering in turbid media has been studied often. Compared to the exact solution for plane‐parallel diffusers, the Kubelka and Munk solution appears as an approximation. The photon diffusion model is also an approximate solution restricted to the case of low light absorption, for which the prior work of Silvy has been ignored. It gives interesting relations between Kubelka‐Munk conventional parameters and the more intrinsic quantities related to the properties of the media introduced by the photon model. © 2003 Wiley Periodicals, Inc. Col Res Appl, 28, 227–228, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/col.10149     

以太网媒体转换器的设计与实现

介绍了100Mb/s和10Mb·s-1/100Mb·s-1两种以太网自适应媒体转换器的工作原理及特点,并以TP112和KS8993两款芯片为核心,设计并实现了上述两种以太网媒体转换器。     

A Finite Element Computational Method for Gas Hydrate. Part II: Application

A finite element model has been applied to the dissociation of gas hydrates in porous media by hot water injection. In the first step, it was applied to calculate the temperature and saturation profiles for a two-phase convective heat transfer case. The second step involved hydrate thawing calculations with release of water and gas. Realistic results were obtained in predicting the temperature, pressure, and water saturation profiles in the hydrate medium with respect to time, when subjected to hot water injection at high pressure in a wellbore. Furthermore, the thaw front progression calculated by this scheme exhibits stable and satisfactory behavior with respect to time.     

Domain element local integral equation method for potential problems in anisotropic and functionally graded materials

An efficient numerical method is proposed for 2-d potential problems in anisotropic media with continuously variable material coefficients. The method is based on the local integral relationships (integral form of balance equation and/or integral equations utilizing fundamental solutions) and consistent approximation of field variable using standard domain-type elements. The accuracy and convergence of the proposed method is tested by several examples and compared with benchmark analytical solutions.     

地下各种压力之间关系式的修正

目前在钻井工程中普遍采用的地下各种压力之间的关系式是不严格的，研究把岩石视为多孔介质，从多孔介质的角度出发，重新建立上覆岩层压力，孔隙流体压力、基岩应力之间的关系式，该式包含了岩石作为多孔介质的一个重要参数孔隙度Φ。     

对流型地层内井下换热器实验模拟研究

采用3-5mm的饱和微珠玻璃球堆来模拟同轴管式井下换热器（DCHE）周围对流型地温地层，对其换热过程中温度分布及其变化、主要影响因素进行了实验研究，为利用同轴管式井下换热器开发地热资源提供依据。