As the body must appear : contemporary performances in post-Marikana South Africa

On the 16th of August 2012 34 Lonmin miners lost their lives at Marikana in South Africa. Marikana bears witness to the socio-economic inequality and precarious work and living conditions in South Africa’s new globalized state. Two site-specific contemporary performances Mari and Kana (2015) and Iqhiya Emnyama (The black cloth, 2015) voice this sad event in a remarkable way. In this article we critically reflect on the performances’ avenues of creating transformative encounters between performers, spectators and the performance sites in South African society. Both performances invoke for the audience members a remarkable awareness of the performance site as the spectator is obliged to navigate him- or herself in a politically induced public landscape in Cape Town’s Company Garden. We concur that Mari and Kana and Iqhiya Emnyama both elicit a profound reflection on the daily life struggle of mourning women against inhumanity and socio-economic inequality in a neoliberal South Africa. Unsettling the dominant focus on resilient subjects, the omnipresence of women’s vulnerability in the two performances nurtures a rethinking process on structural justice. In doing so, we more closely analyse the performances’ intention to subvert the constructed category of ‘the mourning South African woman’ via multiple representations of mourning precedents as cultural elements. We conclude that both performances entail unique driving forces that question existing power systems that impact on SA and the problematic structural injustice at the heart of the massacre

Distributed multi-user MIMO transmission using real-time sigma-delta-over-fiber for next generation fronthaul interface

To achieve the massive device connectivity and high data rate demanded by 5G, wireless transmission with wider signal bandwidths and higher-order multiple-input multiple-output (MIMO) is inevitable. This work demonstrates a possible function split option for the next generation fronthaul interface (NGFI). The proof-of-concept downlink architecture consists of real-time sigma-delta modulated signal over fiber (SDoF) links in combination with distributed multi-user (MU) MIMO transmission. The setup is fully implemented using off-the-shelf and in-house developed components. A single SDoF link achieves an error vector magnitude (EVM) of 3.14% for a 163.84 MHz-bandwidth 256-QAM OFDM signal (958.64 Mbps) with a carrier frequency around 3.5 GHz transmitted over 100 m OM4 multi-mode fiber at 850 nm using a commercial QSFP module. The centralized architecture of the proposed setup introduces no frequency asynchronism among remote radio units. For most cases, the 2 x 2 MU-MIMO transmission has little performance degradation compared to SISO, 0.8 dB EVM degradation for 40.96 MHz-bandwidth signals and 1.4 dB for 163.84 MHz-bandwidth on average, implying that the wireless spectral efficiency almost doubles by exploiting spatial multiplexing. A 1.4 Gbps data rate (720 Mbps per user, 163.84 MHz-bandwidth, 64-QAM) is reached with an average EVM of 6.66%. The performance shows that this approach is feasible for the high-capacity hot-spot scenario

Polygyny and strong genetic structuring within an isolated population of the wood ant Formica rufa

Social structuring of populations within some Formica species exhibits considerable variation going from monodomous and monogynous populations to polydomous, polygynous populations. The wood ant species Formica rufa appears to be mainly monodomous and monogynous throughout most of its distribution area in central and northern Europe. Only occasionally it was mentioned that F. rufa can have both polygynous and monogynous colonies in the same geographical region. We studied an isolated polydomous F. rufa population in a deciduous mixed forest in the north-west of Belgium. The level of poly-domy within the colonies varied from monodomous to 11 nests per colony. Our genetic analysis of eight variable microsatellites suggest an oligo- to polygynous structure for at least the major part of the sampled nests. Relatedness amongst nest mate workers varies considerable within the population and colonies but confirms in general a polygynous structure. Additionally high genetic diversity (e.g. up to 8 out of 11 alleles per nest for the most variable locus) and high within nest genetic variance (93%) indicate that multiple queens contribute to the gene pool of workers of the same nest. Moreover significant genetic structuring among colonies indicates that gene flow between colonies is restricted and that exchange of workers between colonies is very limited. Finally we explain how possible factors as budding and the absence of Serviformica can explain the differences in genetic structure within this polygynous F. rufa population