Dendrogramma, new Genus, with two new non- bilaterian species from the Marine Bathyal of Southeastern Australia (Animalia, Metazoa incertae sedis) – with similarities to some medusoids from the precambrian ediacara

This study examines a new species of dinosaur named Dendrogramma, which has been found near Bass Strait. Abstract A new genus, Dendrogramma, with two new species of multicellular, non-bilaterian, mesogleal animals with some bilateral aspects, D. enigmatica and D. discoides, are described from the south-east Australian bathyal (400 and 1000 metres depth). A new family, Dendrogrammatidae, is established for Dendrogramma. These mushroom-shaped organisms cannot be referred to either of the two phyla Ctenophora or Cnidaria at present, because they lack any specialised characters of these taxa. Resolving the phylogenetic position of Dendrogramma depends much on how the basal metazoan lineages (Ctenophora, Porifera, Placozoa, Cnidaria, and Bilateria) are related to each other, a question still under debate. At least Dendrogramma must have branched off before Bilateria and is possibly related to Ctenophora and/or Cnidaria. Dendrogramma, therefore, is referred to Metazoa incertae sedis. The specimens were fixed in neutral formaldehyde and stored in 80% ethanol and are not suitable for molecular analysis. We recommend, therefore, that attempts be made to secure new material for further study. Finally similarities between Dendrogramma and a group of Ediacaran (Vendian) medusoids are discussed

Volatility of and cross-correlation between major international stock indices before and during the COVID-19 pandemic

Master's thesis in Business administration (BE501)Following the arrival of the year 2020, the extraordinary outbreak of the novel coronavirus (COVID-19), which was initially seen as an epidemic, evolved into an all-out pandemic. Consequently, its effects have shaken the global economies and affected countries across the globe. This thesis investigates the relationship between market disturbances across countries and models the recent COVID-19 pandemic’s influence on the volatility and cross-market correlation in six major stock indices: S&P 500, S&P/TSX, DAX, FTSE 100, Nikkei 225 and SSE. We estimated the pandemic effect on market volatility with a univariate GJR-GARCH model, and employed a multi-variate DCC-GARCH to examine the conditional correlations between six of the largest economies in the world. We also visualized the regime switching between low and high correlation regimes with a two-regime Markov switching model. Our discoveries suggest that the six indices behaved almost identically under the COVID-19 period, with the Nikkei 225 being the only one that did not show evidence of a higher sensitivity towards COVID-19 news. Furthermore, the filtered and smoothed transition-probability charts showed evidence of stronger cross-correlation during periods of distress and uncertainty, and suggestions of one common market in situations like this are valid. Overall, our findings contribute to previous literature seeking to understand the recent pandemic’s influence on capital markets and the negative consequences associated with markets being highly integrated. Keywords: COVID-19, volatility, contagion, capital markets JEL Classification: C12, C15, C32, C5

Redbook: 1995

Advice compiled by Boston University School of Medicine students for incoming first year students and third or fourth year students preparing for clinical rotations

Atualidade da clínica de orientação psicanalítica em ciências da educação: pesquisas e práticas

This paper is a reflexion regarding a work with groups that analyze practices which are carried out with Specialized Education students. It tries to analyze the psychic and social effects of these groups over the students, and also to interrogate about the knowledge that can emerge from them. We have noticed that, during this work, the students were not able to elaborate a professional knowledge on their educational practices. We conclude that these difficulties come from processes related to a sadomasochist dimension of the attitude of these students.O presente artigo constitui uma reflexão em torno de um trabalho com grupos de análise de práticas realizados com estudantes de educação especializada, e busca analisar os efeitos psíquicos e sociais desses grupos sobre os estudantes, bem como interrogar sobre o saber que daí pode emergir para cada sujeito. Constatou-se que, nesse trabalho, os es tudantes demonstravam, em inúmeras ocasiões, uma dificuldade de elaborar um saber profissional quanto à sua prática educativa a partir dessas sessões de trabalho. Concluiu-se que tais dificuldades podiam advir de processos relacionados com uma dimensão sadomasoquista da postura dos estudantes

The Lloyd G. Balfour President-in-Residence Annual Report 2007-2008

This is the archive of the annual reports for the African Presidential Center's President-in-Residence program

POV: Obama's ban on juvenile solitary confinement

Point of view article in BU Toda

BUSM News and Notes

Monthly newsletter providing updates of interest to the Boston University School of Medicine community