694 research outputs found
Marriage as Black Citizenship?
The narrative of black marriage as citizenship enhancing has been pervasive in American history. As we mark the fiftieth anniversary of the Moynihan Report and prepare to celebrate the 150th anniversary of Thirteenth Amendment, this Article argues that this narrative is one that we should resist. The complete story of marriage is one that involves racial subordination and caste. Even as the Supreme Court stands to extend marriage rights to LGBT couples, the Article maintains that we should embrace nonmarriage as a legitimate frame for black loving relationshipsâgay or straight. Nonmarriage might do just as much, if not more, to advance black civil rights. Part I explores marriageâs role in racial subordination by looking at the experiences of African Americans, as well as Native Americans, Puerto Ricans, and Asian Americans. Drawing on institutional structure analyses, it then considers how legal marriage has âmarriedâ Blacks to second-class citizenship. Part II explores the current place of marriage in African America. It argues that, while the regulation of black loving relationships today differs dramatically from what we saw in earlier times, family law often has a punitive effect on such American families. Part III contemplates the benefits of adopting a focus on nonmarriage. It contends that meeting black families where they are holds the most potential for progress in addressing the structural barriers to success faced by those families. The Article ends with a âcall to actionâ for legal scholars and others concerned about black families and citizenship. It maps a broad agenda for exploring in earnest the potential that supporting and valuing the existing networks, arrangements, and norms regarding gender and caretaking in African America has for promoting black citizenship and equality in the twenty-first century
Parenting While Black
Changes in law and policyânot to mention developments such as the COVID-19 pandemic and its devastating effects on familiesâraise important questions about how to define parental rights and how to best support parents and children during these challenging times. The Symposium also presented important questions about issues of race, gender, sexuality, and class in our modern context. Even more salient in this space are issues of race. Here, as in other contexts, Black families, like my grandmotherâs and so many others, are the âcanaries in the mine.â Their experiences provide us with important insight into the signs of danger facing Black and Brown families. To that extent, the concerns of families, like my grandmotherâs, should be at the center of our discussion around families and the challenges they face in this moment. This Essay intervenes in the conversation hosted by the Fordham Law Review by focusing on issues of race, which, as I have indicated elsewhere, remain underexplored in family law scholarship.1 More specifically, it endeavors to give greater context to the term âparenting while Black,â which I utilized in the narrative that launched this iniquity. In the wake of George Floydâs death at the hands of police in 2020,2 people of all walks of life are all too familiar with the phrase âdriving, or even walking, while Black.â3 These phrases reference the scores of Black and Brown people killed or badly injured at the hands of white law enforcement officers, often when the need for such action was plainly unwarranted.4 In deploying the term âparenting while Black,â I mean to invoke not only the criminal justice context, but also all the systems that inform the functioning and well-being of families of color. Enumerating such systems provides us with a deeper appreciation of the obstacles that parents of color must navigate in trying to provide for their children
The combination of ground-based astrometric compilation catalogues with the HIPPARCOS Catalogue. II. Long-term predictions and short-term predictions
The combination of ground-based astrometric compilation catalogues, such as
the FK5 or the GC, with the results of the ESA Astrometric Satellite HIPPARCOS
produces for many thousands of stars proper motions which are significantly
more accurate than the proper motions derived from the HIPPARCOS observations
alone. In Paper I (Wielen et al. 1999, A&A 347, 1046) we have presented a
method of combination for single stars (SI mode). The present Paper II derives
a combination method which is appropriate for an ensemble of 'apparently
single-stars' which contains undetected astrometric binaries. In this case the
quasi-instantaneously measured HIPPARCOS proper motions and positions are
affected by 'cosmic errors', caused by the orbital motions of the photo-centers
of the undetected binaries with respect to their center-of-mass. In contrast,
the ground-based data are 'mean values' obtained from a long period of
observation. We derive a linear 'long-term prediction' (LTP mode) for epochs
far from the HIPPARCOS epoch T_H ~ 1991.25, and a linear 'short-term
prediction' (STP mode) for epochs close to T_H. The most accurate prediction
for a position at an arbitrary epoch is provided by a smooth, non-linear
transition from the STP solution to the LTP solution. We present an example for
the application of our method, and we discuss the error budget of our method
for the FK6 (a combination of the FK5 with HIPPARCOS) and for the combination
catalog GC+HIP. For the basic fundamental stars, the accuracy of the FK6 proper
motions in the LTP mode is better than that of the HIPPARCOS proper motions
(taking here the cosmic errors into account) by a factor of more than 4.Comment: Slightly revised version. Accepted for publication in Astronomy and
Astrophysic
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Earth Science Informatics Community Requirements for Improving Sustainable Science Software Practices: User Perspectives and Implications for Organizational Action
Science software is integral to the scientific process and must be developed and managed in a sustainable manner to ensure future access to scientific data and related resources. Organizations that are part of the scientific enterprise, as well as members of the scientific community who work within these entities, can contribute to the sustainability of science software and to practices that improve scientific community capabilities for science software sustainability. As science becomes increasingly digital and therefore, dependent on software, improving community practices for sustainable science software will contribute to the sustainability of science. Members of the Earth science informatics community, including scientific data producers and distributers, end-user scientists, system and application developers, and data center managers, use science software regularly and face the challenges and the opportunities that science software presents for the sustainability of science. To gain insight on practices needed for the sustainability of science software from the science software experiences of the Earth science informatics community, an interdisciplinary group of 300 community members were asked to engage in simultaneous roundtable discussions and report on their answers to questions about the requirements for improving scientific software sustainability. This paper will present an analysis of the issues reported and the conclusions offered by the participants. These results provide perspectives for science software sustainability practices and have implications for actions that organizations and their leadership can initiate to improve the sustainability of science software
CROWN-TO-ROOT RATIO IN ENDODONTIC SURGERY: A SURVIVAL STUDY
Aim: to assess the influence of the crown height (CH), root length (RL) and crown-to-root ratio (CRR) on the survival of te- eth subjected to surgical endodontic retreatment and classi- fied as periapically healed.
Methods: a single operator performed all the endodontic mi- crosurgery interventions. The present analysis selected the te- eth classified as ââcomplete periapical healingââ according to the Molven-Halse-Grung scale. The periapical radiographs were analyzed by two independent calibrated examiners, who measured CH and RL in a blind manner. The CRR was calcula- ted as the ratio of the two variables CH and RL. The measure- ments were performed by comparing the post-operative radio- graphs (t0) with those taken for a previous retrospective analysis (t1) and the most recent available (t2). An independent
statistician conducted a survival analysis using Kaplan-Meier plots and a log-rank test (a = 0.05).
Results: thirty-eight patients were evaluated, each one contri- buting to the study with a single tooth. The mean follow-up pe- riod was 5,96 ± 3,36 years. Comparing the CRR and RL values between t1 and t2, the difference was found statistically signifi- cant (p = 0.03). Survival was improved for the teeth with roots longer than 7 mm. There were no statistically significant diffe- rences among the remaining comparisons.
Conclusions: root length â„ 7mm exhibited better chances of long-term survival. Over time, a risk of further decrease of cli- nical RL due to periodontal disease and consequent increase of CRR could be critical by a mechanical point of view. Other studies are needed
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