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According to the perceptual engineering research paradigm, rock tea packaging design research framework of perceptual engineering is used as a guide to determine the typical samples and core perceptual vocabulary of rock tea packaging through various methods such as literature search, expert evaluation, KJ method, questionnaire survey, etc. The semantic difference method is used to quantify user perceptions and conduct principal component analysis to arrive at rock tea packaging presenting four core perceptual attributes: bright, environmentally friendly, exquisite and the mapping relationship between the core perceptual vocabulary and design elements was obtained through class category analysis to obtain a rock tea packaging design that fits the perceptual cognition of young consumers.

Existing proposals of Software-Defined Information-Centric Networking（SDICN）are difficult to support massive content delivery and to enable respective updates of switching and buffering components.This motivates us to propose an overlay-based SDICN system,in which content request forwarding and caching run only at the edge cache nodes.Decoupling caching from switching relaxes the above limitations of the existing proposals.Centralized control derived from software-defined networking overcomes the sub-optimality problem with overlay mechanisms.Experiments based on our prototype show that the system can be naturally superposed upon a software-defined network with significant reduction of response time when a few number of cache nodes are deployed.Our results are beneficial for the extension and application of software-defined networking and information-centric networking.

As the use of Information Technology (IT) applications has become more widespread, focus has turned toward applying IT to the learning domain, with policy initiatives aimed at integrating IT with teaching. E-Portfolios have assumed growing importance in higher education as institutions seek new teaching-learning-assessment tools to increase learner autonomy in virtual learning environments. Based on the Technology Acceptance Model (TAM) and Information System Success Model (ISSM), this research investigates and analyzes the attitudes, degree of satisfaction and acceptance of e-Portfolio system users. The results indicate that, among prospective users, attitude appears to have the strongest and most significant direct effect on usage intentions, while satisfaction serves as a preliminary condition to mediate the effect of the users' attitude on intention to use. In addition, the utility users perceive in the e-portfolio system influences their attitude and intention more than it does their perceived ease of use. Moreover, service quality utility has a greater influence on user satisfaction and intention than does system quality and information quality. This model provides a systematic understanding of prospective users' perceptions of the e-Portfolio system, and such an understanding could help in the development and promotion of e-Portfolio systems in educational contexts. (Contains 3 tables and 4 figures.)

This study attempts to develop a recyclable, high strength, ecological soil material that does not consist of cement and is unpolluted, named high-strength ecological soil material (HSESM). The production of HSESM involves calcinating soil minerals to very high temperatures, adding active minerals, using concentrated alkali to disintegrate silicate and aluminate monomers, and, using [Na.sub.2]Si[O.sub.4] to repolymerize the soil material to a polymer that resembles the structure of zeolite. The results of the study show that the 28-day compressive strength of high strength ecological soil material exceeds 20 MPa, with flexural strength in the order of 10% of the compressive strength. The permeability of this material is categorized as moderate level according to ASTM C 1202-97. Discarded HSESM can be reverted back to powder using jaw crushers and mechanical grinding facilities. Through the four steps described previously, the recycled HSESM can be reused again. DOI: 10.1061/(ASCE)0899-1561(2007)19:2(149) CE Database subject headings: Ecology; Compressive strength; Permeability; Soils.

Ready-mixed soil material (RMSM) is a new range of soil material with physical properties lying between controlled low-strength material (CLSM) and soil cement. The design approach of RMSM combines the advantages of both CLSM and soil cement, yet it resolves the following deficiencies of the two materials. The production of CLSM uses large quantities of coarse aggregate, sand, and cement, and results in a high-density high-strength CLSM mix, which is difficult to reexcavate. Soil cement is not suited to site conditions where there is confined working space. The unconfined compressive strength of RMSM is 2 to 30 times greater than that of soil materials, and the flexural strength is about 5 to 10% greater than that of its unconfined compressive strength. The RMSM material developed in this research has adequate strength its intended purpose, yet it allows re-excavation at a later date. CE Database subject headings: Compressive strength; Flexural strength; Backfills; Soil mixing.