Digital ethnography, resistance art and communication media in Iran

Iranian visual materials relating to the presidential election crisis have the potential to become the sites of analysis and debate for fields as diverse as history, visual history, memory and post-memory, or trauma studies. References to memory are now omnipresent in scholarly discourse and in a wider public debate: ”social memory’, “collective remembrance”, “national memory”, “public memory”, “counter memory”, “popular history making” and “lived history” jostle for attention.Publisher PDFPeer reviewe

Distributed-memory parallelization of an explicit time-domain volume integral equation solver on Blue Gene/P

Two distributed-memory schemes for efficiently parallelizing the explicit marching-on in-time based solution of the time domain volume integral equation on the IBM Blue Gene/P platform are presented. In the first scheme, each processor stores the time history of all source fields and only the computationally dominant step of the tested field computations is distributed among processors. This scheme requires all-to-all global communications to update the time history of the source fields from the tested fields. In the second scheme, the source fields as well as all steps of the tested field computations are distributed among processors. This scheme requires sequential global communications to update the time history of the distributed source fields from the tested fields. Numerical results demonstrate that both schemes scale well on the IBM Blue Gene/P platform and the memory efficient second scheme allows for the characterization of transient wave interactions on composite structures discretized using three million spatial elements without an acceleration algorithm

Memory and the Infrared

Memory effects in scattering processes are described in terms of the asymptotic retarded fields. These fields are completely determined by the scattering data and the zero mode part is set by the soft photon theorem. The dressed asymptotic states defining an infrared finite S- matrix for charged particles can be defined as quantum coherent states using the corpuscular resolution of the asymptotic retarded fields. Im- posing that the net radiated energy in the scattering is zero leads to the new set of conservation laws for the scattering S-matrix which are equivalent to the decoupling of the soft modes. The actual observabil- ity of the memory requires a non vanishing radiated energy and could be described using the infrared part of the differential cross section that only depends on the scattering data and the radiated energy. This is the IR safe cross section with any number of emitted pho- tons carrying total energy equal to the energy involved in the actual memory detection

Training Programme Impact in Improving the Working Memory of Students with Learning Disabilities in Reading Arabic

The study aimed to investigate the effect of a training program on improving working memory for students with learning difficulties in reading Arabic. The study sample consisted of (10) students with learning disabilities from Basic Education students from the fifth and sixth grades, and those between the ages (10-11) years as a pilot group and (10) students from the same stage and of the same age as a control group. The researcher used a working memory battery, Raven Test, and a training program he prepared to achieve the study goal. The results showed that there are statistically significant differences in the fields of working memory scale between the members of the experimental and control groups in the dimensional measurement, and in favor of the experimental group to which the training program was applied, by applying the measure of working memory in its three fields. The results also showed that there are statistically significant differences between the pre and post measurements of the areas of the working memory scale in favor of the post application, and for the benefit of the experimental group,This confirms the effectiveness of the training program used. Some recommendations were suggested