带冠涡轮盘电火花加工专用CAD/CAM软件开发

In this paper,a special-purpose CAD/CAM software package,BliskCad/Cam,based on a commercial CAD/CAM software Unigraphics is developed to reduce difficulties in CNC-EDM of the shrouded turbine blisks.The software package con- sists of five modules such as electrode design,path searching,and machining simulation module.Functions of BliskCad/Cam include parametrical reconstruction of 3-D model of the blisk,intelligent design of complex shaped electrode,automatic gener- ation of NC codes,search of interference-free tool path for multi-axis NC-EDM and machining simulation,etc.Experimental verification is conducted by using BliskCad/Cam and the results show that it satisfies the requirements,and can realize pre- cision machining and reduce accessorial time remarkably.     

Making the right connections: Differential effects of reading intervention for subgroups of comprehenders

The purpose of this study was to compare the effects of different types of questioning interventions on students' reading comprehension. Fourth-grade students (n = 246) were identified as struggling, average, or good readers and assigned randomly within school to one of three questioning interventions: two inferential conditions (Causal or General) or one literal condition (“Who, What, Where, When” or W-questioning). Teachers delivered the interventions for 20–30 min, 2–4 times per week, for 8–10 weeks. All readers made reliable pre- to posttest comprehension gains as measured by story recall (ps < .001 to .04). Differential effects for intervention were found between two subgroups of struggling comprehenders—elaborators and paraphrasers. Elaborators benefited more than paraphrasers from Causal questioning (d = .86) whereas paraphrasers benefited more than elaborators from General questioning (d = 1.46). These findings suggest that identifying subgroups is important in developing and evaluating the effectiveness of reading comprehension interventions.     

Title IV‐E Programs: Preparing MSW Students for Public Child Welfare Practice

This article investigates the perceived quality and skill outcomes of Title IV‐E MSW training programs at four universities from the perspective of their graduates. It also sought to identify necessary program supports, expectations of graduates as they began child welfare employment, and pre‐employment factors related to retention. The vast majority of MSWs agreed that their education was high quality and prepared them well for child welfare practice. The skills rated highest were establishing client rapport, case management, the development of a professional identity, and time management and assessment skills. The most consistent pre‐employment predictors of whether they stayed past their stipend commitment period were their commitment to the public child welfare (PCW) agency and their commitment to child welfare practice. Implications for program design are discussed.     

Supporting teacher responsiveness in assessment for learning through disciplined noticing

Abstract

Assessment for learning (AfL) practices are commonly recommended as effective classroom strategies for providing teachers with information about student understanding. For teachers, the substantive potential of these AfL practices to inform student learning actions depends on what teachers notice and select as a focus and how they interpret and act on the information they have. This paper suggests research on teacher professional noticing has something to offer in understanding how teacher AfL attention and actions are framed in the moment. It explains noticing as a responsive act that invites action that is an inclusive, dynamic and purposeful response to evidence of student ideas. Noticing is what enables a teacher to act on the fly because it informs and underpins possible actions. Three frames of noticing are introduced to guide noticing and action – curriculum connoisseurship, cultural and community connectedness, and collaborative ways of working. Through consideration of classroom events using these frames, teachers become better prepared to choose to respond in the moment creatively. The three frames provide teachers and researchers with a conceptual language to articulate and sharpen their AfL practices as part of a flexible and rigorous responsiveness to their students’ learning.     

Use of Print Media in Teacher Training 1

Abstract

Primary Education is seen as a critical element for general improvement of the economic and social future of Honduras and the most significant action currently underway is the work being done through the Primary Education Efficiency Project which is financed by a major grant from the United States Agency for International Development (USAID). The Project has as its major objective the improvement of the quality of educational services at the primary level through the development of new textbooks for grades one through six and extensive in‐service teacher training which is described here. This article presents the three essential elements of a specific training implemented; the contents, the media to be used and the methodology for its delivery. The medium chosen for the training was a printed document in a newspaper format which was given the name Accion Educativa. The general reaction from the teachers to this form of presentation was highly positive and the success of the use of the print medium led to the conclusion that the project should continue using similar publications, and should study the possibility of establishing Accion Educativa as a monthly periodical for primary school teachers.