Promiscuous Care in Movement-Based Research: Lessons Learned from Collaborations in Manhattan's Chinatown

Decolonial and feminist studies scholars have long recognised the intricate ways in which the personal and academic are deeply interwoven and that the co-production of knowledge is essential for social transformation. This article examines the cultural organising of the Chinatown Art Brigade, an intergenerational collective of artists, activists, writers, educators and practitioners driven by the fundamental belief that cultural, material, and aesthetic modes of production have the power to combat gentrification. Specifically, I situate the collective within a longer lineage of Asian American cultural organising in Manhattan Chinatown and draw from years of movement-based research as a member of the collective. Incorporating personal reflection and interviews conducted with brigade members, this article speaks to how the themes of power, temporality and affectivity show up in movement-based research. How can we think more capaciously about academic and non-academic collaboration, to push the boundaries and explore new possibilities that honour the time, expertise and trauma of directly impacted communities? In reflecting on my work with the Chinatown Art Brigade, I discuss the nuances of intergenerational co-production of knowledge and interrogate how a feminist ethics of promiscuous care can uncover new possibilities for collaboration between cultural workers, organisers and movement-based scholars within and beyond the neoliberal academy

A ULX associated with a cloud collision in M99

The Sc galaxy M99 in the Virgo cluster has been strongly affected by tidal interactions and recent close encounters, responsible for an asymmetric spiral pattern and a high star formation rate. Our XMM-Newton study shows that the inner disk is dominated by hot plasma at kT ~ 0.30 keV, with a total X-ray luminosity ~ 10^{41} erg/s in the 0.3--12 keV band. At the outskirts of the galaxy, away from the main star-forming regions, there is an ultraluminous X-ray source (ULX) with an X-ray luminosity ~ 2 x 10^{40} erg/s and a hard spectrum well fitted by a power law of photon index Gamma ~ 1.7. This source is close to the location where a massive HI cloud appears to be falling onto the M99 disk at a relative speed > 100 km/s. We suggest that there may be a direct physical link between fast cloud collisions and the formation of bright ULXs, which may be powered by accreting black holes with masses ~ 100 Msun. External collisions may trigger large-scale dynamical collapses of protoclusters, leading to the formation of very massive (>~ 200 Msun) stellar progenitors; we argue that such stars may later collapse into massive black holes if their metal abundance is sufficiently low.Comment: 10 pages, accepted by MNRA

Does Gender Matter? Gendered Relations in the Recording Studios

Only 8.6% of all recording engineers currently employed in the United States are women. To understand the influence of a woman’s gender in their recording career, this study presents their experiences from multiple angles – the recording studio business, women engineers’ obstacles, the recording education pipeline, and diversity and inclusion in the industry

life, man

This piece paints the picture of what life felt like from the composer’s vantage point, specifically at the time when the composition was conceived. The first section employs the first sixteen pitches present in the harmonic series as an embodiment of the pure nature of sound – vibration, physics, and acoustics. The middle section shows a dynamic that pulls in two directions, one going sharper and sharper ascending through the circle of fifths and the other going flatter and flatter descending, all the while a steady pedal point in the center of the axis nonchalantly ticks like clockwork. As this is happening, a rhythmic pattern (inside joke: Rite of Spring reference) slowly permeates in the lower register, eventually overpowering all the harmonic and melodic contents above and pushing the section to its apex. The piece finally dies down in the last section as the strings gently play the “amen chords.” As if the first section was looking straight into the water, it’s reflection in the undertone softly closes the piece

TCR-based lineage tracing: no evidence for conversion of conventional into regulatory T cells in response to a natural self-antigen in pancreatic islets

Foxp3-expressing regulatory T (T reg) cells derive primarily from selection in the thymus. Yet conversion of mature conventional CD4+ T (T conv) cell lymphocytes can be achieved in several conditions, such as transforming growth factor β treatment, homeostatic expansion, or chronic exposure to low-dose antigen. Such conversion might provide a means to generate peripheral tolerance by “converting” potentially damaging T cells that react to self-antigens. We tested this hypothesis in mice transgenic for the BDC2.5 T cell receptor (TCR), which is representative of a diabetogenic specificity that is naturally present in NOD mice and reactive against a pancreatic self-antigen. In the thymus, before any exposure to antigen, clonotype-positive T reg and T conv cells express a second TCRα chain derived from endogenous loci. High-throughput single-cell sequencing of secondary TCRs of the Vα2 family showed their joining CDR3α regions to be very different in T reg and T conv cell thymocytes. These specific CDR3α motifs, thus, provided a “tag” with which to test the actual impact of T conv to T reg cell conversion in response to peripheral self-antigen; should the autoreactive clonotypic TCR induce T conv to T reg cell conversion upon encounter of cognate antigen in the pancreas or draining lymph node, one would expect to detect tag CDR3α motifs from T conv cells in the T reg cell populations. Sequencing large numbers of peripheral BDC+Vα2+ cells showed that little to no conversion occurs in response to this pancreatic autoantigen

Update on results of SPRE testing at NASA Lewis

The Space Power Research Engine (SPRE), a free-piston Stirling engine with a linear alternator, is being tested at NASA Lewis Research Center as part of the Civilian Space Technology Initiative (CSTI) as a candidate for high capacity space power. Results are presented from recent SPRE tests designed to investigated the effects of variation in the displacer seal clearance and piston centering port area on engine performance and dynamics. The impact of these variations on PV power and efficiency are presented. Comparisons of the displacer seal clearance tests results with HFAST code predictions show good agreement for PV power, but show poor agreement for PV efficiency. Correlations are presented relating the piston midstroke position to the dynamic Delta P across the piston and the centering port area. Test results indicate that a modest improvement in PV power and efficiency may be realized with a reduction in piston centering port area

NASAs Land, Atmosphere near Real-Time Capability for EOS ( LANCE) @10 Years: A Look Back at Its Origins in MODIS Terra

This poster looks back on how the first near real-time (NRT) images from MODIS Terra provided the impetus for the creation of the Land, Atmosphere Near Real-Time Capability for EOS (LANCE) a near real-time (NRT) capability that currently serves low latency products for monitoring air quality, floods, duststorms, snow cover and agriculture, as well as for public education and outreach to users in over 160 countries

Formalisation en Coq d'algorithmes de filtres numériques

National audienceLes algorithmes de filtres numériques sont un outil essentiel du traitement du signal et du contrôle-commande. Ils sont utilisés dans de nombreux domaines comme les télécommunications, l'automobile, la robotique, l'aéronautique etc. Comme certains de ces domaines sont critiques , nous souhaitons garantir formellement qu'ils se comportent bien numériquement malgré les erreurs d'arrondi inhérentes à leur implémen-tation en précision finie. Or il existe de nombreux algorithmes pour calculer un filtre numérique, que l'on appelle réalisations. En précision finie, des réalisations légèrement différentes, par exemple où seulement l'ordre des calculs est modifié, peuvent donner des résultats différents. La SIF (Specialized Implicit Form) est un formalisme très général, qui peut représenter toutes les réalisations en détaillant jusqu'à l'ordre des calculs. Cet article étend la formalisation en Coq des filtres numériques présentée dans [1] : il y ajoute la définition de la SIF, les traductions des réalisations de cette formalisation vers la SIF, et le théorème du filtre d'erreur associé à une SIF, qui décrit la propagation des erreurs de calcul au fil des itérations dans l'algorithme correspondant