نظم مركز ابن خلدون للعلوم الإنسانية والاجتماعية حوارًا مفتوحًا لمناقشة جدوى العلوم الاجتماعية لدى صناع القرار وذلك يوم الإثنين (18 أبريل 2022) الموافق السابع عشر من شهر رمضان المبارك. استضاف المركز عِدّة أساتذة جامعة قطر، ومعهد الدوحة للدراسات العُليا، ومؤسسة قطر مختلف مجالات الاجتماعية؛ للإجابة على أسئلة طُرحت خلال الحوار. حيث جاء الحوار لمساءلة اتهام بالإخفاق في إثبات جدواها والتأثير إقناع صُنَّاع الق...

In the class of systems with linear precoder and zeroforcing (ZF) DFE for zero-padded MIMO frequency selective channels, existing optimal transceiver designs present two major drawbacks. First, the optimal system requires a large number of bits to encode the full precoding matrix. Second, the full precoding matrix leads to complex computations. These disadvantages become more severe as bandwidt...

We design efficient numerical schemes for approximating the MHD equations in multidimensions. Numerical approximations must be able to deal with the complex wave structure of the MHD equations and the divergence constraint. We propose schemes based on the genuinely multidimensional (GMD) framework of [S. Mishra and E. Tadmor, Commun. Comput. Phys. 9 (2010) 688–710; S. Mishra and E. Tadmor, SIAM...

Many preterm neonates have white-matter damage (WMD, damaged connections between neurons) and grey matterdamage (GMD, dead neurons). These children are known to have lower IQs than their full-term peers, yet the mechanisms underlying this association are poorly understood. We designed a developmental connectionist model of the Raven Matrices IQ task in which (1) all neurons had intact output, s...

Epidemiological studies show a reciprocal inverse association between cancer and Alzheimer's disease (AD). The common mechanistic theory for this effect posits that cells have an innate tendency toward apoptotic or survival pathways, translating to increased risk for either neurodegeneration or cancer. However, it has been shown that cancer patients experience cognitive dysfunction pre- and pos...

The successful use of hypermedia systems is often impeded by user disorientation or cognitive overhead caused by the non-linear arrangement of hypertext nodes. In this paper, we address the related problem how a user can be supported in his/her construction of coherence during the navigation through a hyperdocument. Instead of leaving this task to the hypertext author or designer alone, we prop...

In this short paper we introduce a novel data model for multidimensional information, GMD, generalising the MD data model first proposed in [Cabibbo and Torlone, 1998]. The aim of this work is not to propose yet another data model, but to find the most general formalism encompassing all the proposals for a logical data model in the data warehouse field, as for example summarised in [Vassiliadis...