After Queer Theory

After Queer Theory makes the provocative claim that queer theory has run its course, made obsolete by the elaboration of its own logic within capitalism. James Penney argues that far from signalling the end of anti-homophobic criticism, however, the end of queer presents the occasion to rethink the relation between sexuality and politics. Through a critical return to Marxism and psychoanalysis (Freud and Lacan), Penney insists that the way to implant sexuality in the field of political antagonism is paradoxically to abandon the exhausted premise of a politicised sexuality. After Queer Theory argues that it is necessary to wrest sexuality from the dead end of identity politics, opening it up to a universal emancipatory struggle beyond the reach of capitalism's powers of commodification

Cold Spray of Copper onto Niobium for Conductive Cooling of Superconducting Radio Frequency Structures

Niobium is used in superconducting radio frequency (SRF) structures that operate at cryogenictemperatures. These structures are continually optimized to increase efficiency and provide cost effectivefabrication. Throughout optimization, material properties of thermal conductivity and mechanical strengthare often jeopardized. Cold spraying has been of interest in coatings, repair, and additive manufacturingand poses a possible solution to optimization of SRF structures. This process involves deposition of adesired material onto a substrate through accelerating the material in the form of a powder to highvelocities via pressurized gas. Currently, the combination of copper powder being deposited onto a niobiumsubstrate via this process has never been studied. This is the first known study of cold-sprayed coppercoatings onto niobium for the application of conductive cooling of SRF accelerating structures. Trials wereconducted to assess the compatibility of cold spray of copper with SRF structures through processing andoperating conditions. The material campaign involved understanding parameters for sample fabrication,substrate preparation, material deposition, and post-processing that may provide optimal coatings. Thisstudy offers a firm base understanding of the copper and niobium cold spray pair. Effective deposition ofthis pair requires mechanical interlocking as there is no metallurgical bonding of these materials at theprocessing temperatures. The extent of mechanical interlocking is affected by substrate preparation andsurface roughness, oxygen content of copper powder, particle velocity, gas temperature, powdermorphology, and particle size distribution

After Queer Theory

After Queer Theory makes the provocative claim that queer theory has run its course, made obsolete by the elaboration of its own logic within capitalism. James Penney argues that far from signalling the end of anti-homophobic criticism, however, the end of queer presents the occasion to rethink the relation between sexuality and politics. Through a critical return to Marxism and psychoanalysis (Freud and Lacan), Penney insists that the way to implant sexuality in the field of political antagonism is paradoxically to abandon the exhausted premise of a politicised sexuality. After Queer Theory argues that it is necessary to wrest sexuality from the dead end of identity politics, opening it up to a universal emancipatory struggle beyond the reach of capitalism's powers of commodification

The effect of ultrasonic irradiation on the microstructure and corrosion rate of a Zn–4.8wt.% Al galvanising alloy used in high performance construction coatings

The microstructure and corrosion resistance of a Zn–4.8 wt.% Al alloy, typically used for high performance galvanised coatings for construction, was modified by the application of ultrasound during solidification. The alloy exposed to ultrasound had an increased volume fraction of smaller, discrete primary η Zn phase regions that were more uniformly distributed throughout the casting. The morphology of η Zn was altered from dendritic to globular and the Zn/Al eutectic growth was disrupted in localised areas from lamellar to anomalous. These changes were likely due to the physical action of the ultrasound disrupting compositional effects, fragmenting dendrites and through the development of cavitation events causing disruptive mixing. These microstructural changes produced an enhanced cut-edge corrosion resistance of the alloy in 0.1% NaCl when coupled with steel mimicking in service coating conditions that was investigated using the SVET. The primary η Zn crystal regions were focussed sites for anodic Zn dissolution and the smaller η regions produced by ultrasound reduced the corrosion rate by preventing the development of crevice like phenomena that may be associated with larger dendrites. The number and size of primary η Zn regions affected the corrosion rate with reductions in these factors reducing the corrosion rate of the alloy

“Detention” under the Charter after R. v. Grant and R. v. Suberu

In R. v. Grant and R. v. Suberu, the Supreme Court of Canada revisited the relationship between police detention powers and the Charter. This article critically analyzes these decisions. The authors argue that the multi-factor approach for deciding whether or not there has been A psychological “detention” under sections 9 and 10 of the Charter that emerges from these cases fails to give police sufficient guidance on the scope of their authority. After canvassing the implications of that uncertainty, the authors put forward a proposal that would bring greater clarity to the meaning of “detention” under the Charter. In addition, the authors also examine Suberu’s conclusion that the right to counsel must be respected incidental to brief lawful investigative detentions. After detailing the potential drawbacks of that holding, the article fleshes out the case for justifying an override of section 10(b) during such encounters

“Detention” under the Charter after R. v. Grant and R. v. Suberu

In R. v. Grant and R. v. Suberu, the Supreme Court of Canada revisited the relationship between police detention powers and the Charter. This article critically analyzes these decisions. The authors argue that the multi-factor approach for deciding whether or not there has been A psychological “detention” under sections 9 and 10 of the Charter that emerges from these cases fails to give police sufficient guidance on the scope of their authority. After canvassing the implications of that uncertainty, the authors put forward a proposal that would bring greater clarity to the meaning of “detention” under the Charter. In addition, the authors also examine Suberu’s conclusion that the right to counsel must be respected incidental to brief lawful investigative detentions. After detailing the potential drawbacks of that holding, the article fleshes out the case for justifying an override of section 10(b) during such encounters

Managing for survival : real estate development in Texas 1980-1989

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1989.Includes bibliographical references (leaves 56-57).by Thomas James Melody and James Franklin Penney Wagley.M.S

Lessons about Reform from “A Very Dangerous Woman”

We discuss reform in antebellum America through the life of Martha Coffin Wright, an activist in the abolition and early women’s rights movements. Consideration of her motivations for reform; the obstacles faced by these movements; their methods, successes, and failures, may offer guidelines for reformers of today

The Role of pH on the Inhibition of Aqueous Zinc Corrosion by L-tryptophan

A combination of in situ Scanning Vibrating Electrode Technique (SVET), and time lapse photography were used to investigate the influence of the amino acid, L-tryptophan, on the localized corrosion occurring on unpolarized zinc (Zn) samples immersed in a 0.17 mol.L−1 aqueous sodium chloride electrolyte. The addition of 1 × 10−2 mol.L−1 of L-tryptophan was found to have a significant effect on the corrosion rate for all pH values tested. At both pH 2 and pH 7, primary protection was suggested to occur as a result of adsorption due to electrostatic interactions. A secondary mechanism, whereby an insoluble complex is formed between Zn (II) ions and anionic L-tryptophan, was also proposed to occur at areas of localized high pH. At pH 2 the additions resulted in an 88% decrease in mass loss, as measured by gravimetric mass loss results and SVET, demonstrating the effectiveness of L-tryptophan inhibitors for this material

Al2O3 Coatings for Protection of Stainless Steel 316L against Corrosion in Zn-Al and Zn-Al-Mg

The production and quality of automotive-grade galvanised steel are affected by the limited service life of the pot roll bearings used in continuous galvanising lines. The journal bearings are subjected to severe degradation as they react with the molten Zn bath, and coatings can provide corrosion protection to the bearing materials. This research investigates the performance of Al2O3 coatings applied via the HVOF thermal spray process to stainless steel 316L substrates. Immersion tests were conducted in baths of different compositions, namely GI (Zn-0.3 wt.% Al) and ZMA (Zn-1.5 wt.% Al-1.5 wt.% Mg). Material characterisation after testing showed evidence of coating degradation after 1 week, as the coating tended to crack and detach from the substrate, allowing the molten Zn to attack the underlying steel. The coefficient of thermal expansion of Al2O3 and steel was measured, and a difference of 13 × 10−6 K−1 was found, leading to the development of cracks in the coatings. Zn penetration through cracks was determined to be the main failure mechanism of the Al2O3 coatings, which otherwise remained inert to Zn-Al. Conversely, the coatings immersed in Zn-Al-Mg reacted with the Mg in the molten metal bath, showing that changing bath composition affected the performance of the coatings in molten Zn alloy