با سلام خدمت کاربران در صورتی که با خطای سیستم پرداخت بانکی مواجه شدید از طریق کارت به کارت (6037997535328901 بانک ملی ناصر خنجری ) مقاله خود را دریافت کنید (تا مشکل رفع گردد).
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1 |
Analysing exposure diversity in collaborative recommender systems: Entropy fusion approach
تجزیه و تحلیل تنوع قرار گرفتن در معرض در سیستمهای توصیه گر مشترک: رویکرد تلفیق آنتروپی-2019 Recommender Systems are considered as essential business tools to leverage the potential
growth of on-line services. Neighbourhood based collaborative filtering, a successful
recommendation approach has mainly focused on improving accuracy of predictions.
From user point of view, it is more valuable to obtain novel and diverse recommendations
rather than monotonic preferences. Ratings given by a user for different categories
of items are considered as a tool to access user exposure diversity which signifies
his creative and divergent thinking. On the other hand, pair of items is concordant if
highly correlated users agree in rating the items. Based on the user exposure diversity
and item concordance, the neighbourhood selection process of item based collaborative
recommender systems is refined. Rating predictions are made based on the newly
selected neighbours. The performance of the proposed approach is investigated for
accuracy and diversity of predictions on Movielens data sets. The results demonstrate
that the proposed approach outperforms the state of the art recommendation approaches
which address accuracy–diversity trade off. Statistical analysis is done to prove the
efficiency of the proposed approach. Keywords: Clustering | Quadratic entropy | Exposure diversity | Novelty | Concordance |
مقاله انگلیسی |
2 |
Functional magnetic resonance imaging of divergent and convergent thinking in Big-C creativity
تصویربرداری رزونانس مغناطیسی تابعی تفکر واگرا و همگرا در خلاقیت C بزرگ-2018 The cognitive and physiological processes underlying creativity remain unclear, and very few studies to date
have attempted to identify the behavioral and brain characteristics that distinguish exceptional (“Big-C”) from
everyday (“little-c”) creativity. The Big-C Project examined functional brain responses during tasks demanding
divergent and convergent thinking in 35 Big-C Visual Artists (VIS), 41 Big-C Scientists (SCI), and 31 individuals
in a “smart comparison group” (SCG) matched to the Big-C groups on parental educational attainment and
estimated IQ. Functional MRI (fMRI) scans included two activation paradigms widely used in prior creativity
research, the Alternate Uses Task (AUT) and Remote Associates Task (RAT), to assess brain function during
divergent and convergent thinking, respectively. Task performance did not differ between groups. Functional
MRI activation in Big-C and SCG groups differed during the divergent thinking task. No differences in activation
were seen during the convergent thinking task. Big-C groups had less activation than SCG in frontal pole, right
frontal operculum, left middle frontal gyrus, and bilaterally in occipital cortex. SCI displayed lower frontal and
parietal activation relative to the SCG when generating alternate uses in the AUT, while VIS displayed lower
frontal activation than SCI and SCG when generating typical qualities (the control condition in the AUT). VIS
showed more activation in right inferior frontal gyrus and left supramarginal gyrus relative to SCI. All groups
displayed considerable overlapping activation during the RAT. The results confirm substantial overlap in
functional activation across groups, but suggest that exceptionally creative individuals may depend less on task
positive networks during tasks that demand divergent thinking.
Keywords: Alternate Uses Task ، Big-C ، Creativity ، Convergent thinking ، Divergent thinking ، Remote Associates Task |
مقاله انگلیسی |
3 |
The Creativity Challenge Game: An educational intervention for creativity enhancement with the integration of Information and Communication Technologies (ICTs)
بازی چالش خلاقیت: یک مداخله آموزشی برای ارتقای خلاقیت با وارد کردن فناوری های اطلاعاتی و ارتباطی-2018 Creativity enhancement is an educational objective. The integration of Information and Communication Technologies (ICTs) into the curriculum is another goal of many educators. In this study a creativity enhancement intervention was conducted with participants students (N = 90, 46 male, 44 female) of mean age M = 18.38, in an information systems course. A quasi-experimental design was employed and the proposed method included the extensive use of Facebook, a collaborative team structure, a game-like competitive environment, questions generation and answering. Creativity was measured with several pre-post divergent thinking tests. Academic achievement was obtained through exam results. Additional data were collected with online questionnaires. Results show that the intervention was overall effective in stimulating creativity. There was a statistically significant increase in fluency, flexibility, elaboration and originality, as measured by divergent thinking tests. Total student creativity calculated with the use of principal component analysis showed a significant positive link to academic achievement and ICT knowledge. Students with almost zero Facebook usage exhibited the highest levels of creativity followed closely by their peers with the highest Facebook usage. Creativity enhancement was not related to Facebook usage or ICT knowledge. Results and implications are discussed, and propositions for future research are offered.
keywords: Computer-mediated communication |Cooperative/collaborative learning |Interactive learning environments |Learning communities |Teaching/learning strategies |
مقاله انگلیسی |