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Petter Bae Brandtzaeg 《Journalism Practice》2016,10(3):323-342
The verification of social media content and sources are increasingly critical to journalists and news organisations. In this study, we report on findings from qualitative interviews conducted with 24 journalists working with social media in major news organisations in Europe. Our findings contribute to new knowledge on journalists' social media working practices. We find that social media content are often used as the primary news source, and journalists use several different verification strategies to verify social media content and sources. Journalists are also found to have various competences in verifying social media content, in particular visual content. Moreover, our study suggests user requirements for future innovations in tools to support the verification of social media content. To avoid trade-offs between verification and fast-paced publishing, journalists will need efficient and easy-to-use support both in the verification process and in structuring and organising an overwhelming amount of social media content. 相似文献
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This study examined the effects of different multimedia design modalities on middle-school students’ motivation and achievement in history and also sought to determine whether an interaction effect on achievement occurs between students’ prior knowledge and the different multimedia design modalities. Two groups of eighth-grade students enrolled in a rural middle school in a southern state created multimedia artifacts using two design modalities: video content design and visual content design. Each group consisted of 21 students ranging in age from 13 to 14. Both groups completed a history lesson on state governors and created video content or visual content, respectively. The results showed that students earned significantly higher achievement test scores when they were involved in the visual content design modality. However, no differences were found in each of the four motivation sub-measures. Furthermore, there was no interaction effect between students’ prior knowledge levels and the different content design modalities. 相似文献
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This study examines the relationships between students’ academic levels, the use of motivational regulation strategies, and cognitive learning strategies. A total of 141 undergraduate and graduate students enrolled in online distance courses participated in the study. The findings show that students use different motivational regulation strategies and cognitive learning strategies depending on their academic levels. Additionally, hierarchical regression analyses using two dependent variables (i.e., surface level learning strategy and deep processing level learning strategy) indicate that a surface level learning strategy (i.e., rehearsal) and deep processing level strategies (i.e., elaboration, organization, and critical thinking) are predicted by different sets of motivational regulation strategies after controlling for academic level and age. The results provide distance educators and instructional designers with practical suggestions on how to support undergraduate and graduate students’ motivational needs and further promote their use of cognitive learning strategies in online distance education programs in higher education. 相似文献
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Bae Christine L. DeBusk-Lane Morgan Hayes Kathryn N. Zhang Fa 《Research in Science Education》2021,51(2):325-346
Research in Science Education - The purpose of this study was to develop and validate a survey of opportunities to participate (OtP) in science that will allow educators and researchers to closely... 相似文献
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Abstract Information technology capable of real‐time evaluation has changed the nature of labor control by completely monitoring a system. This homeostasis of real‐time control eliminating the space barrier has increased workers' stress and anxiety and weakened the workers' solidarity. An IT surveillance system, frequently called an electronic panopticon, has been viewed as the sophisticated form of the Talyor principle of scientific management. However, IT surveillance has operated in the way of combined form with the cultural values of a certain society. In this paper, I show how cultural values influence labor control through IT surveillance using a case study from the tire industry. H tire company has introduced the DAS (Data Acquisition System) for increasing productivity through a new control system. Real‐time evaluation, an instant report of each workers' merit on the monitor, and compensation have made workers feel constantly under surveillance and under stress due to competition with other workers. This IT surveillance has more deeply influenced labor control when combined with patriarchal familism – composed of features such as group‐oriented attitudes, hierarchical relations between the old and young, subordination to one's seniors, etc, which have come to be viewed as some of the typical cultural values prevalent in South Korea. Although the basic principle of technology may be the same in all societies, the effects of applied information technology depend on specific socio‐historical contexts: not only culture, habits, and politics, but also the power relations between managers and workers. I will tentatively designate this as a ‘hybrid form’ of labor control, in the sense that cultural value is added or intermingled with the principle of IT surveillance. 相似文献
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Dong Sun Shin Hae Gwon Jang Sung Bae Hwang Dong‐Hwan Har Young Lae Moon Min Suk Chung 《Anatomical sciences education》2013,6(5):316-323
In the Visible Korean project, serially sectioned images of the pelvis were made from a female cadaver. Outlines of significant structures in the sectioned images were drawn and stacked to build surface models. To improve the accessibility and informational content of these data, a five‐step process was designed and implemented. First, 154 pelvic structures were outlined with additional surface reconstruction to prepare the image data. Second, the sectioned and outlined images (in a browsing software) as well as the surface models (in a PDF file) were placed on the Visible Korean homepage in a readily‐accessible format. Third, all image data were visualized with interactive elements to stimulate creative learning. Fourth, two‐dimensional (2D) images and three‐dimensional (3D) models were superimposed on one another to provide context and spatial information for students viewing these data. Fifth, images were designed such that structure names would be shown when the mouse pointer hovered over the 2D images or the 3D models. The state‐of‐the‐art sectioned images, outlined images, and surface models, arranged and systematized as described in this study, will aid students in understanding the anatomy of female pelvis. The graphic data accompanied by corresponding magnetic resonance images and computed tomographs are expected to promote the production of 3D simulators for clinical practice. Anat Sci Educ 6: 316–323. © 2013 American Association of Anatomists. 相似文献
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A fault tolerant control scheme for actuator and sensor faults is proposed for a tilt-rotor unmanned aerial vehicle (UAV) system. The tilt-rotor UAV has a vertically take-off and landing (VTOL) capability like a helicopter during the take-off & landing while it could cruise with a high speed as a conventional airplane flight mode. A dual system in the flight control computer (FCC) and the sensor is proposed in this study. To achieve a high reliability, a fault tolerant flight control system is required for the case of actuator or sensor fault. For the actuator fault, the fault tolerant control scheme based on model error control synthesis is presented. A designed fault tolerant control scheme does not require system identification process and it provides an effective reconfigurability without fault detection and isolation (FDI) process. For the sensor fault, the fault tolerant federated Kalman filter is designed for the tilt-rotor UAV system. An FDI algorithm is applied to the federated Kalman filter in order to improve the accuracy of the state estimation even when the sensor fails. For a linearized six-degree-of-freedom linear model and nonlinear model of the tilt-rotor UAV, numerical simulation and process-in-the-loop simulation (PILS) are performed to demonstrate the performance of the proposed fault tolerant control scheme. 相似文献
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Eun-Hye Park Won-Young Bae Su-Jin Eom Kee-Tae Kim Hyun-Dong Paik 《Journal of Zhejiang University. Science. B》2017,18(2):152-160
Antioxidative and cytotoxic effects of chamomile (Matricaria chamomilla) fermented by Lactobacillus plantarum were investigated to improve their biofunctional activities. Total polyphenol (TP) content was measured by the Folin-Denis method, and the antioxidant activities were assessed by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method and β-carotene bleaching method. AGS, HeLa, LoVo, MCF-7, and MRC-5 (normal) cells were used to examine the cytotoxic effects by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium (MTT) assay. The TP content of fermented chamomile reduced from 21.75 to 18.76 mg gallic acid equivalent (mg GAE)/g, but the DPPH radical capturing activity of fermented chamomile was found to be 11.1% higher than that of nonfermented chamomile after 72 h of fermentation. Following the β-carotene bleaching, the antioxidative effect decreased because of a reduction in pH during fermentation. Additionally, chamomile fermented for 72 h showed a cytotoxic effect of about 95% against cancer cells at 12.7 mg solid/ml of broth, but MRC-5 cells were significantly less sensitive against fermented chamomile samples. These results suggest that the fermentation of chamomile could be applied to develop natural antioxidative and anticancer products. 相似文献
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