Due to limitations of technical and concepts, designers usually lack of concern for the visually impaired group. Tangible interaction and physical interaction are rapidly developing fields in the human-computer interaction research. This paper analyzes the concept of physical interaction techniques and investigates the behaviors and psychological characteristics of visually impaired group. By analyzing the design case, we study the process and methods of the physical interactive products.

Lignocellulosic biomass is one of the most well-studied and promising green carbon sources. Fullest utilization of lignocellulosic biomass in hydrogen-free and mild conditions to produce phenolic monomers while preserving cellulose-rich pulps is challenging and has far-reaching significance. Here, we report an innovative strategy to convert lignocellulosic biomass into lignin oils and cellulose-rich pulps without exogenous hydrogen under mild conditions over Pt/NiAl2O4 catalyst. In this process, the structural hydrogens in hemicellulose are acted as hydrogen source to realize the fractionation and depolymerization of lignin into phenolic monomers while keeping cellulose intact, which is named self-hydrogen supplied catalytic fractionation (SCF). By using water as solvent, theoretical yield of phenolic monomers (46.6 wt%, with propyl(ethyl) end-chained syringol and guaiacol as main products) is achieved at 140 oC for 24 h, with 90 % cellulose intact in birch sawdust. This H2-free process can be extended to other biomass (hardwood, softwood and grass) and can be scaled up. The Pt/NiAl2O4 catalyst also shows good stability in recycling as well as a regeneration treatment. This work provides a new strategy to achieve high utilization of lignocellulosic biomass for sustainable biorefinery by using water as solvent without exogenous hydrogen under mild conditions.

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If learning objects distributed in the environment can directly interact with mobile equipment of the learners through environmental awareness technology, the most appropriate learning content can be presented, learners can stay in mobile learning stably, and original learning effect can not be affected due to obtaining unsuitable learning content in order to achieve close situation interaction between mobile learning and real learning environment. Therefore, environmental awareness technology is applied in the mobile learning, and mobile learning can be converted into ubiquitous learning. In the paper, RFID is adopted for constructing context awareness model aiming at application of mobile learning in libraries, museums, zoos, historical sites, botanical garden and other real learning environments, and learning recommendation algorithm under the model is given.