“青义”生物有机肥在大麦上的施用效果初探

保山市2007年开始应用"青义"生物有机肥,我们通过在大麦上施用不同数量的"青义"生物有机肥试验结果分析,探索该肥对大麦长势、抗性、性状和产量的影响,为保山市大麦高产创建和扩大推广应用该肥提供依据,我们完成大麦肥效正规试验3组,均表现出不同程度的增产效果。

Micromechanical modeling of asphalt concrete fracture using a user-defined three-dimensional discrete element method

A user-defined micromechanical model was developed to investigate the fracture mechanism of asphalt concrete （AC） using the discrete element method （DEM）. A three-dimensional （3D） AC beam was built using the ＂Fish＂ language provided by PFC3D and was employed to simulate the three-point bending beam test at two temperature levels： -10 ℃ and 15℃. The AC beam was modeled with the consideration of the microstructural features of asphalt mixtures. Uniaxial complex modulus test and indirect tensile strength test were conducted to obtain material input parameters for numerical modeling. The 3D predictions were validated using laboratory experimental measurements of AC beams prepared by the same mixture design. Effects of mastic stiffness, cohesive and adhesive strength on AC fracture behavior were investigated using the DEM model. The results show that the 3D DEM fracture model can accurately predict the fracture patterns of asphalt concrete. The ratio of stress at interfaces to the stress in mastics increases as the mastic stiffness decreases; however, the increase in the cohesive strength or adhesive strength shows no significant influence on the tensile strength.

Innovation of Knowledge-based Hyper-multimedia to Promote a Culture of Using ICT Creatively for Adolescents

The purpose of the present research was to develop an innovative knowledge-based hyper-multimedia to promote a culture of using information and communication Technology （ICT） creatively for adolescents. Their learning processes and attitudes toward such innovation in their community were also examined. Thirty juveniles, 13-18 years of age in each Hangdong and Maerim districts, Chiang Mai province were employed in the study. Data collections were made through questionnaires, interview, test, group discussion and brainstorming. Analysis and evaluation were carried out with the applications of sufficient economy philosophy, constructivism theory and Torrance＇s future problem-solving instructional model. Results showed that the learning innovation of hyper-multimedia presented by the use of animation, video, scene and sound with related action script synchronization was considerably effective. With the application of sufficient economy philosophy, the result indicated that performance efficiency （El/E2） was 92.228/9.83 and the adolescents learning processes and attitudes were very good. These included purchasing of moderate ICT equipments, information screening for self-immunity and creative using of internet and ICT morally and ethically according to the computer laws. This independent learning system was properly designed for the juveniles with the right to retrieve the data or stop using at anytime. By using Torrance＇s approach and constructivism theory emphasizing on brainstorming techniques, it was noted that learning process was very well adopted by the adolescents with high satisfaction. They had good attitudes toward the extension of sufficient ICT cultural using in their community with emphasis on brotherly relationship. Related organizations should educate their parents to instruct the juveniles to use the internet properly and encourage people to be aware of ICT business in order to protect social and cultural problems encountered in the future.

Mexican Identity on YouTube： A Youngsters＇ User Approach

The work at hand analyzes the visibility of cultural identity of＂Mexico＂ on the YouTube platform （Retrieved from http：//www.youtube.com）. It is focused on qualitative and quantitative analyses of a sampling of 80 videos that appear when the word ＂Mexico＂ is applied in various search formats within the site itself. User profile is also analyzed, along with video title, labels, date of upload, length, view count, thematic category, and commentaries. From this sampling of videos, an analysis is made upon the cultural identity of ＂Mexico＂ within a postmodernist framework of multicultural, fragmented, and decentralized identities （Friedman, 1994）, parting from the theory of cultural hybridization （Pieterse, 2004）, and under the logic of a media convergent culture （Jenkins, 2004a）.

Geochemistry and tectonic significance of volcanic rocks from Qushenla Formation in Gerze area of northern Tibetan Plateau

By using petrological,isotope chronological,and geochemical methods,the authors studied the volcanic rocks in the studied area,mainly including dacites and trachytes. The results show that they formed during the late Early Cretaceous. Geochemically,the volcanic rocks are relatively enriched in large-ion lithophile elements( Rb,K,and Th) and depleted in high field strength elements( Nb,Ta,and Ti),and rich in light rare earth elements,and depleted in heavy rare earth elements. The fact indicates that the main body of the volcanic rocks in the Qushenla Formation was derived from the partial melting of lower crust. The lithological assemblages are characterized by continental high-K calc-alkaline and shoshonitic series,suggesting that the southward-subducting oceanic slab in southern Bangong Lake had break off and that the Bangong Lake-Nujiang Ocean had closed before 107 Ma. The main dynamic mechanisms for the genesis of this set of intermediate-acidic volcanic rocks were upwelling of the asthenosphere and partial melting of the lower crust caused by slab break-off.

Palynomorph assemblages from the Fenghuoshan Group,southern Qinghai,China:their age and palaeoenvironmental significance

The varicoloured Fenghuoshan Group occurs widely in the Qiangtang-Hoh Xil region of the northern Qinghai-Xizang Plateau. Few fossils have been found to date in this sedimentary succession because lithological conditions are not conducive to their preservation. As a result, there has been a long-term disagreement among geologists about its age. Despite a few lists of fossil names in individual publi- cations, no detailed research on the palaeontology, including palynology, has been reported previously. In this study, we recovered many pollen grains and spores from two samples that were collected on the northern slope of Fenghuo Moun- tain. They indicate an age no younger than Maastrichtian for the upper part of the Fenghuoshan Group. It is considered likely that the entire Fenghuoshan Group represents deposi- tion between the late Early Cretaceous （possibly Albian） and the Maastrichtian. The palynoflora consists mainly of angio- sperm pollen, gymnosperm pollen and fern and bryophyte spores being subordinate. Pollen grains referable to the Ephedrales and the Taxaceae-Cupressaceae groups dominate the assemblage, implying a warm, arid climate and subtropical forest-shrub vegetation at the time of deposition.