Defending Whiteness: The Psychic Life of Anti-Blackness on Grindr

On September 19, 2018, Grindr, the most popular gay men’s dating application, released a video titled Kindr to increase consciousness about sexual racism and make the virtual space a comfortable environment for users. This essay archives users’ comments and conversations that occurred prior to and after the release of Kindr to showcase the specificity of and pervasiveness of anti-Blackness ideology, which goes hand in hand, but is more insidious than racism on Grindr that is not addressed by the video. Drawing from recent theorizations of racism and anti-Blackness ideology and “the psychic life of racism” as theoretical frameworks, we utilize virtual ethnography and thematic analysis to suggest that there is a “psychic life of anti-Blackness” that makes navigating the virtual space a psychically injurious place. Specifically, we document and archive texts from profiles that espoused anti-Black commentary, particularly specific language/discourse, fetishization of Black bodies, and a very violent defensive whiteness that make anti-Blackness prevalent on Grindr. The authors ultimately argue that the “play nice” Kindr campaign was only one step toward consciousness raising, but failed to address anti-Blackness as a perpetual ideology that is firmly entrenched and needs specific uprooting to address the discrimination and ideological violence that uniquely occurs against Black people

Erupted Complex Odontoma Mimicking a Mandibular Second Molar

Complex odontoma (CO) is considered one of the most common odontogenic lesions, composed by a miscellaneous of dental tissue such as enamel, dentin, pulp and sometimes cementum. They may interfere with the eruption of an associated tooth, being more prevalent in the posterior mandible. CO has been rarely reported as erupted, being considered an intraosseous lesion. This is a case report of a 17-year-old male with a benign fibro-osseous lesion consistent with CO that was located at the left second molar region, above the crown of the impacted mandibular second molar tooth. The lesion was surgically removed, and the tooth had to be extracted, since there was no indication that it could erupt naturally or with orthodontic traction. The histopathological examination confirmed the diagnosis of CO and after 6 months complete bone formation was observed radiographically. An early diagnosis will provide a better treatment option, avoiding tooth extraction or a more damaging surgery

On the 2D Dirac oscillator in the presence of vector and scalar potentials in the cosmic string spacetime in the context of spin and pseudospin symmetries

The Dirac equation with both scalar and vector couplings describing the dynamics of a two-dimensional Dirac oscillator in the cosmic string spacetime is considered. We derive the Dirac-Pauli equation and solve it in the limit of the spin and the pseudo-spin symmetries. We analyze the presence of cylindrical symmetric scalar potentials which allows us to provide analytic solutions for the resultant field equation. By using an appropriate ansatz, we find that the radial equation is a biconfluent Heun-like differential equation. The solution of this equation provides us with more than one expression for the energy eigenvalues of the oscillator. We investigate these energies and find that there is a quantum condition between them. We study this condition in detail and find that it requires the fixation of one of the physical parameters involved in the problem. Expressions for the energy of the oscillator are obtained for some values of the quantum number $n$. Some particular cases which lead to known physical systems are also addressed.Comment: 15 pages, 8 figures, matches published versio

Renin-Angiotensin System and Renal Allograft Long-Term Outcome: A Review

Recent developments in immunosuppressive therapy have reduced the loss of allografts from acute rejection, with a significant improvement in the one-year allograft survival. However, the introduction of more potent and selective new drug, had no effect on the development of chronic allograft dysfunction and the long-term outcome remains unchanged. Several and repeated different types of allograft insults such as delayed graft function, rejection episodes, drug nephrotoxicity, hypertension, dislipidemia determines a progressive damage with graft failure within a decade. There is no established maintenance immunosuppressive therapy that decreases chronic allograft dysfunction. The renin-angiotensin system is an important mediator in the pathogenesis of chronic progressive kidney diseases. Although the pathogenesis of chronic allograft nephropathy (CAN) is poorly understood, a reduced nephron function with hemodynamic changes associated with a cascade of inflammatory mediators, result in a chronic inflammatory process, progressive fibrosis and tissue remodeling. Recent evidence has shown beneficial effects of renin-angiotensin system blockade in the posttransplant with a decrease of blood pressure, proteinuria and inflammatory process

Pb(II) binding to humic substances: an equilibrium and spectroscopic study

The binding of Pb(II) to humic acids is studied through an approach combining equilibrium and spectroscopic measurements. The methods employed are potentiometric and fluorometric titrations, fluorescence excitation−emission matrices (EEM) and IR spectroscopy. Potentiometric titration curves are analyzed using the NICA equations and an electrostatic model treating the humic particles as an elastic polyelectrolyte network. EEMs are analyzed using parallel factor analysis, decomposing the signal in its independent components and finding their dependence on Pb(II) activity. Potentiometric results are consistent with bimodal affinity distributions for Pb(II) binding, whereas fluorometric titrations are explained by monomodal distributions. EEM analysis is consistent with three independent components in the humic fluorescence response, which are assigned to moieties with different degree of aromaticity. All three components show a similar quenching behavior upon Pb(II) binding, saturating at relatively low Pb(II) concentrations. This is attributed to metal ion induced aggregation of humic molecules, resulting in the interaction between the aromatic groups responsible for fluorescence; this is also consistent with IR spectroscopy results. The observed behavior is interpreted considering that initial metal binding (observed as strongly binding sites), correspond to bi- or multidentate complexation to carboxylate groups, including binding between groups of different humic molecules, promoting aggregation; further metal ions (observed as weakly binding sites) bind to single ligand groups.Fil: Orsetti, Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de Los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; ArgentinaFil: Marco Brown, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de Los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; ArgentinaFil: Andrade, Estela M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de Los Materiales, Medioambiente y Energía; ArgentinaFil: Molina, Fernando Víctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de Los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; Argentin

Study of large-signal stability of an inverter-based generator using a Lyapunov function

This document analyses the large-signal stability for an inverter-based generator such as photovoltaic and wind power sources. The objective of this study is to determine the stability region taking into account the electrical and control signal of the generator. The generator uses the concept of the electrostatic machine for the model of the generator. Finally, the applied procedure to find the Lyapunov's function is the Popov method, which not only permits to generate a valid function but also to determine the stability region of the system.Postprint (author's final draft

Comparison of heuristics for rescheduling in permutation flowshops

NUMERO ESPECIAL / SPECIAL ISSUE XIII Congreso de Ingeniería de Organización 3nd International Conference on Industrial Engineering and Industrial ManagementRescheduling is one of the main consequences of the variability in the shop floor, as a number of unforeseeable disruptions make impossible to follow the original schedule. In this paper we study a flowshop rescheduling problem where a set of jobs arrives to the system and it is scheduled together with jobs already present. The objective is to minimise the makespan of the new jobs and constrained with the fact that the maximum tardiness of the old jobs must be equal to zero. The problem is NP-hard, so we compare heuristic methods in order to select the best option.. La resecuenciación es una de las principales consecuencias de la variabilidad en los talleres, ya que las interrupciones no hacen posible el seguimiento de la secuencia inicial. Este trabajo aborda un problema de resecuenciación en flujo regular donde un conjunto de trabajos llega al sistema, y son secuenciados junto con un conjunto de trabajos que ya está planificado. El objetivo es minimizar el makespan de los nuevos trabajos, restringido a que la máxima tardanza de los trabajos antiguos debe ser cero. El problema es NP, por lo que se comparan diferentes métodos heurísticos para su resolución, y se selecciona la mejor opciónMinisterio de Ciencia e Innovación DPI2007-61345Junta de Andalucía P08-TEP-363

Otitis externa canina por Aspergillus niger patogénico: reporte de caso

This paper reports a clinical case of Aspergillus otomycosis in an 8-year-old male English Cocker Spaniel, with a previous diagnosis of immune-mediated hemolytic anemia. The patient was treated for pain and discomfort in both ears. Routine blood tests were performed, as well as cytology and microbiological culture of ear secretion. Aspergillus niger together with Malassezia pachydermatis were the isolated, the oral and topical antifungal therapy was established with favorable results after 30 days of treatment. The isolated mold exhibited some important virulence factors such as hemolytic, lipase and amylase activity, as well as in vitro susceptibility to azole antifungals. In the immunosuppressed patients with otitis externa, it is necessary to perform microbiological cultures for environmental fungi, in addition to evaluating the pathogenic characteristic at the phenotypic level. This may help to establish a proper therapeutic approach and monitoring of liver enzymes for possible adverse effects.El presente artículo reporta un caso clínico de otomicosis por Aspergillus en un Cocker Spaniel Inglés macho de 8 años, con diagnóstico previo de anemia hemolítica inmunomediada. El paciente fue atendido por presentar dolor e incomodidad en ambos oídos. Se realizaron análisis sanguíneos, además de citología y cultivo microbiológico de secreción ótica. El Aspergillus niger junto con Malassezia pachydermatis fueron los agentes aislados, para lo cual se instauró una terapia antifúngica oral y tópica con resultados favorables después de 30 días de tratamiento. El moho aislado presentó algunos factores de virulencia importantes como actividad hemolítica, lipasa y amilasa, además de susceptibilidad in vitro a antifúngicos del tipo azoles. En pacientes inmunosuprimidos que presenten otitis externa es necesario realizar cultivos microbiológicos para hongos ambientales, además de evaluar a nivel fenotípico la característica patógena, lo cual ayude a establecer un correcto abordaje terapéutico y monitoreo de enzimas hepáticas por posibles efectos adversos