764 research outputs found
The Wild Beasts
The Wild Beasts springs from my desire to thank my ever-expanding queer chosen family and mentors for their strength. Working through the often violent and othering aspects of the lens and photographic histories I create floral portraits responding to each person’s being and our relationship. Using the 19th century, 8x10 large format view camera—the same used by colonialists and ethnographers to “capture” the divinity of Nature—I erect each as a traditional still life studio setup at the threshold between the natural world and that constructed by humans. These environments speak both to the character of each friend and also to the use of Nature against queer people in most legal systems across the planet. We are deemed unnatural and made criminals through inequitable semantics. The 8x10 negative becomes a portrait, a darkroom contact print that is gifted to each of The Wild Beasts, an intimate artifact of my gratitude. At these borders I lash at the histories of oppression, remaking these lineages and tools into spaces for empathy, tenderness, and love
Barriers and opportunities for hepatitis B testing and contact tracing in a UK Somali population:A qualitative study
Restoration of Woodland Caribou to the Lake Superior Region
Woodland caribou (Rangifer tarandus caribou) historically occupied the boreal forest zone across the North American continent. The distribution and abundance of the species has declined in the past century. In particular, it has been extirpated from much of the southern limits of its historical range on both sides of the boundary between Canada and the United States (Bergerud 1974). Translocation of animals from extant populations may be used to reestablish populations in portions of the species\u27 former range. Recently, wildlife biologists in Ontario have translocated woodland caribou to a number of sites in or adjacent to Lake Superior. While it is too soon to evaluate their long-term success, these restoration efforts do provide useful insights into factors likely to influence the outcome of woodland caribou translocations elsewhere. In this chapter, we examine the 1) historical changes in range distribution, 2) natural history characteristics and requirements, and 3) results of recent translocations of woodland caribou, and use them to evaluate several alternative sites for possible woodland caribou restoration in the Lake Superior region. We also apply minimum viable population analysis to evaluate several translocation scenarios
Anomaly detection on streamed data
We introduce powerful but simple methodology for identifying anomalous observations against a corpus of `normal' observations. All data are observed through a vector-valued feature map. Our approach depends on the choice of corpus and that feature map but is invariant to affine transformations of the map and has no other external dependencies, such as choices of metric; we call it conformance. Applying this method to (signatures) of time series and other types of streamed data we provide an effective methodology of broad applicability for identifying anomalous complex multimodal sequential data. We demonstrate the applicability and effectiveness of our method by evaluating it against multiple data sets. Based on quantifying performance using the receiver operating characteristic (ROC) area under the curve (AUC), our method yields an AUC score of 98.9\% for the PenDigits data set; in a subsequent experiment involving marine vessel traffic data our approach yields an AUC score of 89.1\%. Based on comparison involving univariate time series from the UEA \& UCR time series repository with performance quantified using balanced accuracy and assuming an optimal operating point, our approach outperforms a state-of-the-art shapelet method for 19 out of 28 data sets
THE ROLE OF SERUM COMPLEMENT IN CHEMOTAXIS OF LEUKOCYTES IN VITRO
By the use of chambers containing two compartments with an interposed micropore filter, chemotaxis of polymorphonuclear leukocytes (PMN's) in vitro was studied employing various agents that fixed serum complement (C'). Antigen-antibody complexes, zymosan, and aggregated human gamma globulin, in the presence of fresh rabbit, guinea pig, or mouse serum resulted in the migration of PMN's through the micropore filter. Pepsin-degraded rabbit antibody or unaltered duck serum containing antibody did not exhibit such activity after addition of antigen. Heating of the serum before treatment or the presence of EDTA prevented the generation of the chemotactic factor. The chemotactic factor could not be generated in whole serum from rabbits genetically deficient in C'. However, the defect in this rabbit serum could be corrected by addition of rabbit or human C'6. Serum of B10·D2 mice deficient in hemolytic C' also yielded poor chemotactic activity. Interaction of the first four reacting components of guinea pig C' did not result in significant chemotactic activity unless guinea pig euglobulin with heat labile components was also present. In rabbit serum, C'5 and C'6, when "activated" by interaction with the first four reacting components, behaved like a protein-protein complex and exhibited marked chemotactic activity. By employing conditions favoring dissociation of the complex, the individual components were isolated and shown to be chemotactically inactive. Upon recombination of the two components, however, activity reappeared. Using another approach, the C'5–C'6 complex was isolated intact, and shown to be chemotactically active while other fractions not containing these components were not active. It is postulated that the C'5–C'6 complex is the active chemotactic factor generated in serum after the addition of C'-fixing agents
Booderee National Park Management: Connecting science and management
A 10-year science-management partnership has focussed on three key issues within Booderee National Park in eastern Australia: the impacts of fire on native biota, the response of vertebrates to feral animal control and the control of Bitou Bush. What ha
Characterization of novel inhibitors of HIV-1 replication that function via alteration of viral RNA processing and rev function
Expression of the complete HIV-1 genome depends on the appropriate processing of viral RNA. Altering the balance of viral RNA processing impairs replication of the virus. In this report, we characterize two small molecule modulators of HIV-1 RNA processing, 8-azaguanine and 2-(2-(5-nitro-2-thienyl)vinyl)quinoline (5350150), which function by distinct mechanisms to suppress viral gene expression. Although only 8-Azaguanine dramatically decreased accumulation of HIV-1 unspliced and singly spliced RNAs and altered splice site usage, both compounds blocked Gag and Env expression without affecting production of Tat (p16) and Rev regulatory proteins. Subsequent analyses suggest that these compounds affect Rev-mediated RNA transport by different mechanisms. Both compounds induced cytoplasmic accumulation of Rev, suggesting that they function, in part, by impairing Rev function. This conclusion is supported by the determination that both drugs block the nuclear export of genomic HIV-1 RNA to the cytoplasm. Testing confirmed that these compounds suppress HIV-1 expression in T cells at doses below those previously used in humans for tumour chemotherapy. Together, our observations demonstrate that small molecules can be used to inhibit HIV-1 replication by altering another avenue of viral RNA processing, offering the potential for the development of novel therapeutics for controlling this disease
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