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Quality assessment of Arabic web content: the case of Arabic Wikipedia
No full textWith the huge size and large diversity of Arabic web content, machine assessment of document quality acquires added importance. Users are in dire need for quality rating of the material returned in response to their queries. The Wikipedia, with its large metadata, has been a topic of extensive research on document quality assessment. Criteria used include text properties and style parameters, contributor and edit characteristics and multimedia components. In this paper we report on our ongoing work to adapt existing document assessment approaches to Arabic content with concentration on the Arabic Wikipedia and present some of the results. We also try to augment that with features specific to Arabic as well as parameters like author expertise and social media presence. One of our goals is an aggregate measure integrating many of the features into a single document quality index. We plan to use Wikipedia article quality assessment results to train general content assessment methods that can be applied to general content that lacks major Wikipedia features
قدم الكتابة و انتشارها عند العرب في شمال الجزيرة العربية
No full textصدر في العدد 33 ، 2014 من مجلة كلية الآداب و العلوم الإنسانية، جامعة محمد الخامس، الرباطمدى إنتشار الكتابة في عصر ما قبل الدعوة، و ليس مجرد وجودها، هو موضوع الخلاف و موضعه، و الشائع حسب مصادر التراث أنها قليلة الذيوع، محصورة الإنتشار بين أفراد قلائل من هذه القبيلة أو تلك، الإعتقاد بجهل العرب ما قبل الدعوة للكتابة هو الصفة الغالبة التي يكاد لا يشذ عنها أي كتاب قديم والتي أخذ بها الغالبية منذ القدم مرددة تأكيدا لها عبر التاري
الفلسفة في إسار الأدب
No full textصدر في العدد 8 ، 2014 من مجلة : الأزمنة الحديثةيهدف هذا البحث إلى الوقوف عند أهم ما كتب غالب هلسا في حقل الفلسفة وذلك للكشف عن قدرة عقل مثل عقل غالب هلسا على استدعاء روح تبدو أنها فانية روح المتكلم واستنطاقها لتبوح لغالب و لنا بأساليب البحث عن إجابات لأكثر الأسئلة قلقا التي وإن كانت لأسئلة أثارها النظام إلا أنها على يد غالب تبدو كإجابات أو كمحاولات للإجابة عن أسئلة مقلقة له ولنا في عصرنا الحال
Prediction of zonal and total discharges in smooth straight prismatic compound channels using regression modeling
No full textPublished in : Flow Measurement and Instrumentation, Volume 38, August 2014, Pages 40-48Experimental results are presented concerning the zonal and total discharge distribution and characteristics in a compound channel cross-section comprising one rectangular main channel and two
symmetrical floodplains. The discharges in the main channel, floodplains, and total compound channel
are found to be highly correlated to several dimensionless parameters defined using the compound
channel cross-section geometry. Multi-variable regression analysis was utilized for developing predictive
models that can estimate the main channel, floodplains and total discharges as a function of four
different dimensionless parameters.The developed models to predict the zonal and total discharges in
compound channels are found to be highly significant according to several major statistics including the
model standard error,coefficient of determination (R2), and F-statistic. The developed multi-variable
regression-based models are also tested validity available experimental data. Several statistical
tests applicable to the analysis of residuals have indicated the effectiveness of the developed predictive
models
Silvestre de Sacy et les Druzes: réflexions sur la politique du savoir et l’utilisation conjoncturelle des traditions
No full textA chapter from a book titled : Silvestre de Sacy : Le projet européen d’une science orientaliste, 2014, p.189-206The chapter discusses the ways in which the French orientalist and philologist Silvestre de Sacy conceptualized Druze religious traditions, and how his work was later used and modified by the Egyptian philosopher, the late Abdulrahman Badawi, within a modern conception of the Arab nation. Lastly, the article juxtaposes these intellectual traditions with ethnographic observations on how a contemporary Druze community perceives of its religious traditions
Dynamic Privacy Policy Management in Services-based Interactions
No full textTechnology advancements have enabled the distribution and
sharing of patient personal health data over several data sources. Each
data source is potentially managed by a different organization, which expose
its data as a Web service. Using such Web services, dynamic composition
of atomic data type properties coupled with the context in which
the data is accessed may breach sensitive data that may not comply
with the users preference at the time of data collection. Thus, providing
uniform access policies to such data can lead to privacy problems. Some
fairly recent research has focused on providing solutions for dynamic privacy
policy management. This paper advances these techniques, and fills
some gaps in the existing works. In particular, dynamically incorporating
user access context into the privacy policy decision, and its enforcement.
We provide a formal model definition of the proposed approach and a
preliminary evaluation of the model
Prediction of zonal and total discharges in smooth straight prismatic compound channels using regression modeling
No full text
Investigation of Changes in Tetracycline Repressor Binding upon Mutations in the Tetracycline Operator
No full textVolzing,Katherine:
Vivcharuk,Victor:
Bolintineanu,Dans:
srivas tava,Poonam:The tetracycline operon is an important gene network
component, commonly used in synthetic biology applications because of its
switch-like character. At the heart of this system is the highly specific
interaction of the tet repressor protein (TetR) with its cognate DNA sequence
(tetO). TetR binding on tetO practically stops expression of genes
downstream of tetO by excluding RNA polymerase from binding the
promoter and initiating transcription. Mutating the tetO sequence alters the
strength of TetR−tetO binding and thus provides a tool to synthetic biologists
to manipulate gene expression levels. We employ molecular dynamics (MD)
simulations coupled with the free energy perturbation method to investigate
the binding affinity of TetR to different tetO mutants. We also carry out in
vivo tests in Escherichia coli for a series of promoters based on these mutants.
We obtain reasonable agreement between experimental green fluorescent
protein (GFP) repression levels and binding free energy differences computed from molecular simulations. In all cases, the wildtype
tetO sequence yields the strongest TetR binding, which is observed both experimentally, in terms of GFP levels, and in
simulation, in terms of free energy changes. Two of the four tetO mutants we tested yield relatively strong binding, whereas the
other two mutants tend to be significantly weaker. The clustering and relative ranking of this subset of tetO mutants is generally
consistent between our own experimental data, previous experiments with different systems and the free energy changes
computed from our simulations. Overall, this work offers insights into an important synthetic biological system and demonstrates
the potential, as well as limitations of molecular simulations to quantitatively explain biologically relevant behavio
