An Illusion of Self-Sufficiency for Learning About Artifacts in Scaffolded Learners,But Not Observers     

Emory Richardson  Mark Sheskin  Frank C. Keil 《Child development》2021,92(4):1523-1538

Two studies ask whether scaffolded children (n = 243, 5–6 years and 9–10 years) recognize that assistance is needed to learn to use complex artifacts. In Study 1, children were asked to learn to use a toy pantograph. While children recognized the need for assistance for indirect knowledge, 70% of scaffolded children claimed that they would have learned to use the artifact without assistance, even though 0% of children actually succeeded without assistance. In Study 2, this illusion of self-sufficiency was significantly attenuated when observing another learner being scaffolded. Learners may fail to appreciate artifacts’ opacity because self-directed exploration can be partially informative, such that learning to use artifacts is typically scaffolded instead of taught explicitly.  相似文献   

Evaluating effects of different forms of revision instruction in upper-primary students     

López  Paula  Torrance  Mark  Rijlaarsdam  Gert  Fidalgo  Raquel 《Reading and writing》2021,34(7):1741-1767

Reading and Writing - This study aimed to establish (a) whether teaching students revision skills provides benefit over and above teaching strategies for setting explicit goals for the...  相似文献   

Investigating Students’ Learning Through Co-designing with Technology     

Wu  Jue  Atit  Kinnari  Ramey  Kay E.  Flanagan-Hall  Grace Ann  Vondracek  Mark  Jona  Kemi  Uttal  David H. 《Journal of Science Education and Technology》2021,30(4):529-538

Involving students in the co-design of educational curricula and practices can benefit both students and teachers. Students who participate in co-design may show better learning or increased agency or engagement. In the present study, we investigated what kind of science knowledge or practices can be learned by student co-designers while engaging in co-design practices and how that learning happens with six high school students. We created a model to guide the analysis of students’ learning with technology in co-designing processes. The results revealed that students learned engineering design process even if no explicit instruction on engineering learning was given. Also, our analysis suggested that co-designing with technology enabled learning of the engineering design process and potentially furthered learning of science because it promoted knowledge integration. The results have implications for understanding and enhancing engineering design and science learning through co-designing with technology.

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索尼爱立信K750c挑战相机     

Mark Harris 《科技新时代》2005,(11):49-49

这款200万像素的可拍照手机能否带来令人惊喜的照片。  相似文献   

排汗衬衣     

MarkFischetti哥江华  杨光 《科学中国》2003,(12):70-71

汗水皮肤上蒸发会降低体温，但是由于衣服吸附湿气，反而使体温升高，让人出更多汗为了解决这个问题，服装生产商向运动服市场推出具有“控制湿气”功能的面料，它可以通过毛细管作用将汗液带走，因此衣服很容易干，这是第一批即将推出的高科技面料。  相似文献   

Science and the British Empire     

Harrison M 《Isis; an international review devoted to the history of science and its cultural influences》2005,96(1):56-63

The last few decades have witnessed a flowering of interest in the history of science in the British Empire. This essay aims to provide an overview of some of the most important work in this area, identifying interpretative shifts and emerging themes. In so doing, it raises some questions about the analytical framework in which colonial science has traditionally been viewed, highlighting interactions with indigenous scientific traditions and the use of network-based models to understand scientific relations within and beyond colonial contexts.  相似文献   

Using decision support systems to facilitate the social process of knowledge management     

Gilberto?Montibeller  Duncan?ShawEmail author  Mark?Westcombe 《知识管理研究与实践》2006,4(2):125-137

The social processes involved in engaging small groups of 3–15 managers in their sharing, organising, acquiring, creating and using knowledge can be supported with software and facilitator assistance. This paper introduces three such systems that we have used as facilitators to support groups of managers in their social process of decision-making by managing knowledge during face-to-face meetings. The systems include Compendium, Group Explorer (with Decision Explorer) and V*I*S*A. We review these systems for group knowledge management where the aim is for better decision-making, and discuss the principles of deploying each in a group meeting.  相似文献   

Can creative destruction be destroyed? Military IR&D and destruction along the value-added chain     

Allen Kaufman  Mark Brumer 《Research Policy》2003,32(9):1537-1554

We elaborate a supply chain innovation matrix that can be applied to both commercial and military supply chains. By shifting the analysis from a focal firm to industry structure, we argue that the market structure of the entire supply chain functions as a major moderating variable in determining both the timing and adoption of innovations, both for commercial and military markets. We extend work on supply chain resource dependency by drawing a distinction between market-structure-induced resource dependency and supplier over-reliance on a customer in a competitive market. This has policy implications for the organization of military industrial research and development (IR&D). Joint service research and development (Jointness) will certainly bring about innovation, but it will be incremental, reinforcing established military hierarchies. Policy makers may need to add this probable consequence when comparing Jointness and inter-service rivalry. The cost savings inherent in Jointness may unwittingly sustain a military force unready for fighting the next war.  相似文献   

Author’s response     

Mark Steiner 《Metascience》2001,10(1):32-38

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Maximum temperature in fixed-bed sorption columns and isosteric heats of adsorption     

Mark A. Pollock  Stanley H. Jury 《Journal of The Franklin Institute》1976,302(4):357-365

Heat effects in fixed-bed sorption columns are often quite large and have a pronounced effect on the sorption kinetics. Proper design of such systems must include consideration of these effects.A method is developed for computing the maximum possible bed temperature. The model is tested on two systems: (1) the Linde molecular sieve 4 A/water system and (2) the Alcoa activated alumina F-1/water system. Since the predicted temperatures appeared to be low for the latter system, the model was refined by the inclusion of the isosteric integral heat of adsorption. Tests on the activated alumina show considerable improvement.The isosteres of two sorption therm correlations are investigated. The results show that the heat of adsorption of water on the alumina varies logarithmically with sorbate concentration—approaching high values at low concentrations and approaching the heat of vaporization of water at high concentrations. The results also suggest that the isosteric heat of adsorption behavior may be of use in assessing the “goodness of fit” of sorption therm correlations.  相似文献