Temporal networks in collaborative learning: A case study     

Mohammed Saqr  Ward Peeters 《British journal of educational technology : journal of the Council for Educational Technology》2022,53(5):1283-1303

Social Network Analysis (SNA) has enabled researchers to understand and optimize the key dimensions of collaborative learning. A majority of SNA research has so far used static networks, ie, aggregated networks that compile interactions without considering when certain activities or relationships occurred. Compressing a temporal process by discarding time, however, may result in reductionist oversimplifications. In this study, we demonstrate the potentials of temporal networks in the analysis of online peer collaboration. In particular, we study: (1) social interactions by analysing learners' collaborative behaviour, part of a case study in which they worked on academic writing tasks, and (2) cognitive interactions through the analysis of students' self-regulated learning tactics. The study included 123 students and 2550 interactions. By using temporal networks, we show how to analyse the longitudinal evolution of a collaborative network visually and quantitatively. Correlation coefficients with grades, when calculated with time-respecting temporal measures of centrality, were more correlated with learning outcomes than traditional centrality measures. Using temporal networks to analyse the co-temporal and longitudinal development, reach, and diffusion patterns of students' learning tactics has provided novel insights into the complex dynamics of learning, not commonly offered through static networks.  相似文献   

Tribological evaluation of refined, bleached and deodorized palm stearin using four-ball tribotester with different normal loads     

Chiong Ing Tiong  Yahya Azli  Mohammed Rafiq Abdul Kadir  Samion Syahrullail 《浙江大学学报(A卷英文版)》2012,13(8):633-640

The effects of the mechanical factors with applied loads on the tribological performance of refined, bleached and deodorised (RBD) palm stearin (PS) were studied using a four-ball tribotester. All the RBD PS results were simultaneously compared with the additive-free paraffinic mineral oil (PMO). The experiments were carried out using different loads with a constant speed in order to gain a better understanding of the mechanical processes that occurred during the experiment. For each experiment, the temperature was increased to 75 °C and was run for 1 h. In a mechanical system, lubricant plays an important role in reducing wear and friction. PS exists as a semi-solid at room temperature after the fractionation process from oil palm. Due to the increasing rate of pollution to the environment, vegetable oil was chosen as the test lubricant with regard to its biodegradability. Other advantages of vegetable oil are that it is more easily harvestable and non-toxic compared to petroleum-based oil, which made it a suitable candidate. From the experiment, RBD PS is found to have a better friction constraint reduction compared with additive-free PMO.  相似文献   

Teaching religious education: researchers in the classrooms     

Mohammed S.H. Alshehri 《Educational Research and Evaluation》2013,19(5):511-512

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Web-based technology in a constructivist community of learners     

Chris Muire Mohammed J Nazarian Penny J Gilmer 《British journal of educational technology : journal of the Council for Educational Technology》1999,30(1):65-68

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Team-Based Learning: Moderating Effects of Metacognitive Elaborative Rehearsal and Middle School History Content Recall     

Greg Roberts  Nancy Scammacca  David J. Osman  Colby Hall  Sarojani S. Mohammed  Sharon Vaughn 《Educational Psychology Review》2014,26(3):451-468

Promoting Acceleration of Comprehension and Content through Text (PACT) and similar team-based models directly engage and support students in learning situations that require cognitive elaboration as part of the processing of new information. Elaboration is subject to metacognitive control, as well (Karpicke, Journal of Experimental Psychology: General 138(4):469–485, 2009)—successful learners use metacognitive elaborative rehearsal to process and make sense of incoming information even in the absence of structured opportunities or instructional prompts for elaborating. Levels of processing and cognitive load theories suggest that students in PACT classrooms may outperform students in comparison classes because PACT engages and supports deep cognitive processing (via elaboration and discussion) at the time of learning, allowing participants to better conserve and more consistently reallocate cognitive and metacognitive resources (compared to students in the non-treated group) for encoding content. In other words, PACT may moderate the relationship of metacognitive elaborative rehearsal and content retrieval. Extant data from years 1 (n?=?419) and 2 (n?=?704) of the PACT/RFU project suggests such an effect. As hypothesized, there were no mean differences in reported metacognitive rehearsal use across the groups because metacognitive elaborative rehearsal was not taught. However, regression coefficients for content recall on metacognitive elaboration were greater in the treatment group in both samples suggesting that an instructional emphasis on deep processing leads to better content recall. The findings are discussed in the context of the Common Core State Standards and the large-scale testing programs in place currently across the USA.  相似文献   

Can transformational leadership influence on teachers’ commitment towards organization,teaching profession,and students learning? A quantitative analysis     

Mohammed Sani Ibrahim  Simin Ghavifekr  Sii Ling  Saedah Siraj  Mohd Ibrahim K. Azeez 《Asia Pacific Education Review》2014,15(2):177-190

This study investigates the impact of transformational leadership as idealized influence, inspirational motivation, intellectual stimulation, and individualized consideration on teachers’ commitment towards organization, teaching profession, and students’ learning. A quantitative survey method was applied, and four broadly hypothesized relationships were tested with a sample of 1,014 trained non-graduate and graduate teachers serving in twenty-seven secondary schools in Sarawak, Malaysia. The results indicate a moderate level of teachers’ commitment and a low level of transformational leadership qualities among the respondents. This study found that inspirational motivation, individualized consideration, and intellectual stimulation were the factors contributing towards teachers’ commitment to teaching profession, and there was no dominant factor influencing commitment to students’ learning. Moreover, it was discovered that inspirational motivation was a factor to teachers’ efficacy and teaching experience. Besides, teachers’ efficacy and teaching experience were predictors to teachers’ commitment to organization, teaching profession, and students’ learning, respectively. These findings revealed that there was a significant relationship between transformational leadership and teachers’ commitment to organization and teaching profession, but not students’ learning. The results of this study indicate the necessity for leadership development of school leaders so that they could systematically acquire and internalize the effective transformational leadership qualities that are crucial in changing teachers’ attitude and improving their commitment towards their profession.  相似文献   

Between the Human and the Foreign: Translating Arabic Drama for the Stage     

Mohammed Albakry 《Educational theory》2014,64(5):497-514

In this essay, Mohammed Albakry discusses the notion of accommodating cultural differences in translation and the need to respect these differences without compromising or emphasizing them. First, Albakry reflects on translation as an act of interpretation in light of Terence's famous saying “nothing human can be foreign to me.” Second, he comments on the place of drama in translation and translation studies in order to contextualize his project — translating a number of critically acclaimed contemporary Egyptian plays. He then reviews and critiques the binary model of foreignization/domestication, drawing on some concrete examples of the cultural challenges of translating Arabic drama for the American stage. Albakry concludes by conceptualizing an alternative translational space of dialogical encounters between the human/familiar and the foreign in translation, and by considering the relevance of the Terentian maxim to the negotiation of maintaining sameness while preserving difference.  相似文献   

Separation of tumor cells with dielectrophoresis-based microfluidic chip     

Mohammed Alshareef  Nicholas Metrakos  Eva Juarez Perez  Fadi Azer  Fang Yang  Xiaoming Yang  Guiren Wang 《Biomicrofluidics》2013,7(1)

The present work demonstrates the use of a dielectrophoretic lab-on-a-chip device in effectively separating different cancer cells of epithelial origin for application in circulating tumor cell (CTC) identification. This study uses dielectrophoresis (DEP) to distinguish and separate MCF-7 human breast cancer cells from HCT-116 colorectal cancer cells. The DEP responses for each cell type were measured against AC electrical frequency changes in solutions of varying conductivities. Increasing the conductivity of the suspension directly correlated with an increasing frequency value for the first cross-over (no DEP force) point in the DEP spectra. Differences in the cross-over frequency for each cell type were leveraged to determine a frequency at which the two types of cell could be separated through DEP forces. Under a particular medium conductivity, different types of cells could have different DEP behaviors in a very narrow AC frequency band, demonstrating a high specificity of DEP. Using a microfluidic DEP sorter with optically transparent electrodes, MCF-7 and HCT-116 cells were successfully separated from each other under a 3.2 MHz frequency in a 0.1X PBS solution. Further experiments were conducted to characterize the separation efficiency (enrichment factor) by changing experimental parameters (AC frequency, voltage, and flow rate). This work has shown the high specificity of the described DEP cell sorter for distinguishing cells with similar characteristics for potential diagnostic applications through CTC enrichment.  相似文献   

The Emergence of a News Website Ecosystem: An Exploratory Study of Hespress     

Mohammed Ibahrine 《Journalism Practice》2020,14(8):971-990

ABSTRACT

This paper examines the emergence of a news ecosystem, focusing on Hespress, Morocco’s first, largest, and most popular news website and its current economic success. My analysis investigates Hespress’s emergence and growth into a significant source for news content, reaching an unprecedented number of readers in Morocco and abroad. This paper argues that the success of Hespress’s business model is grounded in a particularly well-developed understanding of social media, the changing habits of digital readers, and a strategic combination of investigative reporting and curated user-generated content. My findings, then, show how Hespress used a strategy that can serve as a sustainable revenue model which was diversified to include other sources of revenue such as e-commerce, branded events, and native advertising, combined with distribution strategies that rely heavily on social and other digital platforms.  相似文献   

Mobile personal information management agent: Supporting natural language interface and application integration     

Lina Zhou  Ammar S. Mohammed Dongsong Zhang 《Information processing & management》2012,48(1):23-31

Managing personal information such as to-dos and contacts has become our daily routines, consuming more time than needed. Existing PIM tools require extensive involvement of human users. This becomes a problem in using mobile devices due to their physical constraints. To address the limitations of traditional PIM tools, we propose a model of mobile PIM agent (PIMA) that aims to improve PIM on mobile devices through natural language interface and application integration. We conducted a user study to evaluate PIMA empirically with prototype systems. The results show that mobile PIMA improved perceived usefulness, ease-of-use, and efficiency of PIM on mobile devices, which in turn accounted for positive attitude and intention to use the system. The findings of this study provide suggestions for designing and developing PIM applications on mobile devices.  相似文献