Media Research Center

About: Media Research Center is a based out in . It is known for research contribution in the topics: Collaborative learning & Educational technology. The organization has 491 authors who have published 950 publications receiving 28581 citations. The organization is also known as: MRC.

The Use of DNA Precipitation Assay for Evaluating DSB Induced by High and Low LET Radiations: Comparison with Sedimentation Results

Abstract: The assays used for measurements of DNA double strand breaks (dsb), such as neutral sucrose gradient or filter elution, need sophisticated and expensive equipments as well as a great deal of time. Recently, Olive (1988) has proposed a relatively simple method for detecting dsb-related damage: a DNA precipitation assay in non-denaturing conditions. The principle of this method is that the treatment of cells with sodium dodecyl sulphate and KC1 causes cell proteins to precipitate, trapping long pieces of DNA. If breaks are introduced by radiation, DNA fragments remain in the supernatant.

Interactive Video Annotation Tool for Generating Ground Truth Information

Abstract: In this paper, we propose an interactive video and image annotation tool to generate ground truth information, that is essential information for training deep neural network. The proposed annotation tool not only generates various ground truth (GT) information such as object, motion, and event information, but also supports a semi-automatic video and image annotation method for fast generation of ground truth. The ground truth generated in the proposed tool is stored in the metadata database as a form of XML. The implementation results show that the proposed annotation tool provides faster and more detailed ground truth information compared to the existing methods.

Simultaneous and sequential presentation of realistic and schematic instructional dynamic visualizations

Abstract: An experiment was conducted to investigate the effects of combining realistic and schematic dynamic visualizations of mitosis. Ninety-two students from four different biology classes were randomly assigned to one of four conditions. Participants in the simultaneous condition studied both a realistic and a schematic visualization of mitosis that were presented simultaneously; participants in the sequential condition studied these two visualizations sequentially; and participants in the schematic-only condition and the realistic-only condition studied only one of the visualizations. Afterwards, participants made a verbal and visual recognition test, and rated the difficulty and comprehensibility of the visualizations. The results showed that the conditions did not differ on verbal and visual recognition. Only on the schematic questions of the visual recognition test, the realistic-only condition scored significantly lower than the other three conditions. Also, no differences were found on the difficulty and comprehensibility ratings. It is concluded that studying multiple representations of a dynamic process is not necessarily better than studying only one representation.

Potential and Impact Factors of the Knowledge and Information Awareness Approach for Fostering Net-Based Collaborative Problem-Solving: An Overview:

Abstract: For effective communication and collaboration in learning situations, it is important to know what the collaboration partners know. However, the acquisition of this knowledge is difficult, especially in collaborating groups with spatially distributed members. One solution is the Knowledge and Information Awareness approach developed by Engelmann and colleagues. This approach provides spatially distributed collaborating group members digital visualizations of the knowledge and the information underlying the knowledge of their partners. The current article gives an overview regarding the empirical studies that have demonstrated the efficacy of the Knowledge and Information Awareness approach: A first set of experimental studies confirmed the effectiveness of this approach to foster both knowing what the collaborators know and knowing to which information they have access. A second set of experimental studies identified the underlying impact factors of the Knowledge and Information Awareness approach. The th...