Advanced geometrical constructs in a Pueblo ceremonial site, c 1200 CE

Summer 2015 marked the 100th anniversary of the excavation by J.W. Fewkes of the Sun Temple in Mesa Verde National Park, Colorado, an ancient complex prominently located atop a mesa, constructed by the ancestral Pueblo peoples approximately 800 years ago. While the D-shaped structure is generally recognized by modern Pueblo peoples as a ceremonial complex, the exact uses of the site are unknown, although the site has been shown to have key solar and lunar alignments. In this study, we examined the potential that the site was laid out using advanced knowledge of geometrical constructs. Using aerial imagery in conjunction with ground measurements, we performed a survey of key features of the site. We found apparent evidence that the ancestral Pueblo peoples laid out the site using the Golden rectangle, Pythagorean 3:4:5 triangles, equilateral triangles, and 45 degree right triangles. The survey also revealed that a single unit of measurement, L = 30.5+/-0.5 cm, or one third of that, appeared to be associated with many key features of the site. Further study is needed to determine if this unit of measurement is common to other ancestral Pueblo sites, and also if geometric constructs are apparent at other sites. These findings represent the first potential quantitative evidence of knowledge of advanced geometrical constructs in a prehistoric North American society, which is particularly remarkable given that the ancestral Pueblo peoples had no written language or number system.Comment: 38 pages, 5 figures, accepted by the Journal of Archaeological Science: Reports, January 2017 (in press

Ideology is theft: Thoughts on the legitimacy of a Maori psychology

‘War, in fact, can be seen as a process of achieving equilibrium among unequal technologies’ (McLuhan, 1964) We are at war. As Western science and its accompanying technology expands the frontiers of knowledge at an ever-increasing rate, ‘indigenous’ perspectives of knowledge are exiled into the borderlands of special interest groups and localized research programmes. Mainstream scientific thought lays claim to objective interpretations of experience at the expense of alternative realities offered by emerging theories of knowledge. Furthermore, as localized worldviews (i.e., those derived from ancestral knowledge bases and pre-industrial or non-scientific premises) challenge existing paradigms, the inevitable interactions threaten to undermine the fidelity of this knowledge. One such arena where this ideological conflict is apparent is the growing field of Maori psychology

Te Piringa

Māori have an oral tradition, that is, the transfer of knowledge within and between generations, which was carried out orally by way of story-telling or the more formal speech-making. Ngā korero purākau are the stories and whaikōrero is formal talking on the marae or ancestral gathering places of Māori people. The value of public speaking is expressed in the saying: Ko te kōrerote kai a te Rangatira – (The chiefs thrive on talking and debating). This article looks at the transfer of knowledge to the next generation

A Complete Generalized Adjustment Criterion

Covariate adjustment is a widely used approach to estimate total causal effects from observational data. Several graphical criteria have been developed in recent years to identify valid covariates for adjustment from graphical causal models. These criteria can handle multiple causes, latent confounding, or partial knowledge of the causal structure; however, their diversity is confusing and some of them are only sufficient, but not necessary. In this paper, we present a criterion that is necessary and sufficient for four different classes of graphical causal models: directed acyclic graphs (DAGs), maximum ancestral graphs (MAGs), completed partially directed acyclic graphs (CPDAGs), and partial ancestral graphs (PAGs). Our criterion subsumes the existing ones and in this way unifies adjustment set construction for a large set of graph classes.Comment: 10 pages, 6 figures, To appear in Proceedings of the 31st Conference on Uncertainty in Artificial Intelligence (UAI2015

Understanding Language Death in Czech-Moravian Texas

Based on several decades of personal interaction with Texas speakers of Czech, the author's article attempts to correlate social change with some specific stages of language obsolescence and language death. Many instances of language change in that community, as well as cultural and social change, may be explained by the linguistic model known as the wave theory. One hundred and fifty years passed between the introduction of Czech and the death of that language in Texas. From the mid-nineteenth through the mid-twentieth century, the Czech-Moravians represented a closed community in which individuals defined their identity primarily by the Czech language, ethnicity, and culture. In the final five decades of the twentieth century, as the social template representing Texas speakers of Czech disintegrated, spoken Czech ceased to function as a living language, and much of the ancestral culture connected with the language was lost. Today some among the elderly, described as semi-speakers, terminal speakers, or "rememberers" of language, retain a limited knowledge, but the ancestral language now has only a symbolic function

Interpreting and using CPDAGs with background knowledge

We develop terminology and methods for working with maximally oriented partially directed acyclic graphs (maximal PDAGs). Maximal PDAGs arise from imposing restrictions on a Markov equivalence class of directed acyclic graphs, or equivalently on its graphical representation as a completed partially directed acyclic graph (CPDAG), for example when adding background knowledge about certain edge orientations. Although maximal PDAGs often arise in practice, causal methods have been mostly developed for CPDAGs. In this paper, we extend such methodology to maximal PDAGs. In particular, we develop methodology to read off possible ancestral relationships, we introduce a graphical criterion for covariate adjustment to estimate total causal effects, and we adapt the IDA and joint-IDA frameworks to estimate multi-sets of possible causal effects. We also present a simulation study that illustrates the gain in identifiability of total causal effects as the background knowledge increases. All methods are implemented in the R package pcalg.Comment: 17 pages, 6 figures, UAI 201

Negotiating cultural identity through the arts: Fitting in, third space and cultural memory

The article examines ways in which arts-based educational approaches were applied to a group of African descendant youth in Western Australia, as a way of understanding challenges to their bicultural socialization and means to developing their bicultural competence. Drawing on African cultural memory as a cultural resource enabled participants to discover the relevance of African cultural memory and embodied knowledge to their bicultural socialization and bicultural competence. The article challenges the argument that successful integration into dominant culture is only possible when migrants remain focused on acquisition of dominant cultural values – ‘Fitting in’. The African Cultural Memory Youth Arts Festival (ACMYAF) offered an alternative conception of successive integration as a process inclusive of creative appropriation and revaluation of ancestral culture through cultural memory. The festival became a third space through which the participants explored embodied knowledge and African cultural memory towards a positive self-concept and bicultural competence

From Ancestral Knowledge to Clinical Practice: The Case of \u3cem\u3eAgonias\u3c/em\u3e and Portuguese Clinicians in America

Cultures have varying notions about symptom expression and the treatment of mental health issues. Consequently, clients and psychotherapists may or may not share a similar worldview. In the psychotherapy literature there has been increased attention to these complex processes. This survey descriptive study aims to understand how therapists working with culturally diverse clients incorporate sensitivity to cultural differences. Fifteen culturally sensitive mental health care providers working with the Portuguese immigrant community were interviewed about their practices. Specifically, we investigated their understanding of the symptoms, causes and cures for agonias, a culture specific phenomenon. It was found that even though the providers are all Portuguese themselves, the meaning that they ascribed to agonias (anxiety and/or depression) was very different than the meaning ascribed to agonias by community members. The community member’s meanings ranged from indigestion to being on the brink of death. A cluster analysis revealed that clinicians who stated that agonias is anxiety, conducted cognitive behavioral therapy or psychopharmacology, and those that stated agonias had a depressive component tended to use family therapy or psychoanalysis

Inferring ancestral sequences in taxon-rich phylogenies

Statistical consistency in phylogenetics has traditionally referred to the accuracy of estimating phylogenetic parameters for a fixed number of species as we increase the number of characters. However, as sequences are often of fixed length (e.g. for a gene) although we are often able to sample more taxa, it is useful to consider a dual type of statistical consistency where we increase the number of species, rather than characters. This raises some basic questions: what can we learn about the evolutionary process as we increase the number of species? In particular, does having more species allow us to infer the ancestral state of characters accurately? This question is particularly relevant when sequence site evolution varies in a complex way from character to character, as well as for reconstructing ancestral sequences. In this paper, we assemble a collection of results to analyse various approaches for inferring ancestral information with increasing accuracy as the number of taxa increases.Comment: 32 pages, 5 figures, 1 table