活用质性评价策略和方法 提升初中地理教学有效性

有效的评价，是学生课堂学习的动力源，是提升课堂教学有效性的关键环节。质性评价，新课程发展性评价的一种方式，当前课程改革多元评价所倡导的一种重要评价方式，对促进学生的发展和提升地理教学有效性具有关键作用。但在其实施过程中存在如何有效实施质性评价以及质性评价具体方法的运用问题。文章针对此进行了实践探讨。

高校学生综合学业评价模式研究

对学生进行综合学业评价是高校教育教学一项重要的系统工程。对学生学业水平给予客观评价既是优化教学设计的需要,又对引导学生树立积极的学习态度具有重要意义。基于A大学学生在校期间各类原始学业成绩,设计评价学生能力素质的综合评价模式,构建量化评价模型和提出质性评价策略,对高校及时有效实施学业评价具有重要借鉴意义。

民族教育研究方法的点睛之作——评苏德教授的《民族教育质性研究方法:理论、策略与实例》

社会科学研究领域一直非常重视质性研究方法的应用,但是这种研究方法也存在自身的不足。苏德教授主编的《民族教育质性研究方法:理论、策略与实例》一书将质性研究方法的不足进行重新审视。将该研究方法存在的学习与应用、理解与阐释、"知识的探索者"与"知识建构者"三个悖论进行重新的思考与解读,使其最大限度地统一起来,使学习与研读本书的人员能从中得到指导,为在民族教育研究中使用质性研究方法提供帮助。

Hybrid Strategy of Particle Swarm Optimization and Simulated Annealing for Optimizing Orthomorphisms

Orthomorphism on F2^n is a kind of elementary pemmtation with good cryptographic properties. This paper proposes a hybrid strategy of Particle Swarm Optimization （PSO） and Sirrmlated Annealing （SA） for finding orthomorphisrm with good cryptographic properties. By experiment based on this strategy, we get some orthorrorphisrm on F2^n = 5, 6, 7, 9, 10） with good cryptographic properties in the open document for the first time, and the optirml orthorrrphism on F found in this paper also does better than the one proposed by Feng Dengguo et al. in stream cipher Loiss in difference uniformity, algebraic degree, algebraic irrarnity and corresponding pernmtation polynomial degree. The PSOSA hybrid strategy for optimizing orthomerphism in this paper makes design of orthorrorphisrm with good cryptographic properties automated, efficient and convenient, which proposes a new approach to design orthornorphisrm.

Analysis of Price and Industry Dynamics of Sustainable and Specialty Coffee in Costa Rica

Volatility of commodity prices has affected dramatically the coffee industry in recent years, particularly small holder farmers. Differentiation of coffee through certification, such as sustainahility and quality attributes, has been proposed as a strategy for protection of the farmers against volatility in the international prices. This research paper evaluated three different models to explore the effectiveness of the differentiation strategies in protecting the farmer against price volatility in recent years, focusing on the case of Costa Rica. Evidence showed important differences in the price dynamics over time when comparing three groups of coffee.

A general strategy for high-throughput experimental screening of promising bulk thermoelectric materials

High-throughput(HTP)experiments play key roles in accelerating the discovery of advanced materials,but the HTP preparation and characterization,especially for bulk samples,are extremely difficult.In this work,we developed a novel and general strategy for HTP screening of high-performance bulk thermoelectric materials.The performed fullchain HTP experiments cover rapid synthesis of the bulk sample with quasi-continuous composition,microarea phase identification and structure analysis,and measurement of the spatial distribution of the sample composition,electrical and thermal transport properties.According to our experiments,bulk Bi_(2-x)Sb_(x)Te_(3)(x=1-2)and Bi_(2)Te_(3-x)Se_(x)(x=0-1.5)samples with quasi-continuous compositions have been rapidly fabricated by this HTP method.The target thermoelectric materials with the best Sb/Bi and Te/Se ratios are successfully screened out based on subsequent HTP characterization results,demonstrating that this HTP technique is effective in speeding up the exploration of novel high-performance thermoelectric materials.

Fabrication of high-quality all-graphene devices with low contact resistances

All-graphene devices are new class of graphene devices with simple layouts and low contact resistances. Here we report a clean fabrication strategy for all-graphene devices via a defect-assisted anisotropic etching. The as-fabricated graphene is free of contamination and retains the quality of pristine graphene. The contact resistance at room temperature （RT） between a bilayer graphene channel and a multilayer graphene electrode can be as low as -5 Ω.·μm, the lowest ever achieved experimentally. Our results suggest the feasibility of employing such all-graphene devices in high performance carbon-based integrated circuits.

Towards a self-adaptive service-oriented methodology based on extended SOMA

We propose a self-adaptive process （SAP） that maintains the software architecture quality using the MAPE-K standard model. The proposed process can be plugged into various software development processes and service-oriented meth- odologies due to its explicitly defined inputs and outputs. To this aim, the proposed SAP is integrated with the service-oriented modeling and application （SOMA） methodology in a two-layered structure to create a novel methodology, named self-adaptive service-oriented architecture methodology （SASOAM）, which provides a semi-automatic self-aware method by the composition of architectural tactics. Moreover, the maintenance activity of SOMA is improved using architectural and adaptive patterns, which results in controlling the software architecture quality. The improvement in the maintainability of SOMA is demonstrated by an analytic hierarchy process （AHP） based evaluation method. Furthermore, the proposed method is applied to a case study to represent the feasibility and practicality of SASOAM.

Fluorescence triggered by ligand-protein hydrophobic interaction

Hydrophobic fluorescence:Tan and his colleagues recently introduced a brand new chemotype of environment-sensitive fluorescent turn-on probes to detect the hydrophobic ligand-binding domain by using SBD fluorophore.The design strategy described in this report generalized the environment sensitivity turn-on mechanism to recognize a specific protein,which provides a robust breakthrough for interchanging fluorescence in conventional small-molecule fluorescent imaging.