16 research outputs found

    Interactions in improvised music: people at play

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    Interactions in improvised music: people at play This project began as an open exploration of musical interactions in a trio in which I have played bass for many years. We gave three concerts for the project and I explored our interactions by talking with the pianist/bandleader and drummer after each concert. They described a broad range of interactions and explored a number of different conceptions of what entails a musical interaction. The musicians were keen to talk about the factors that motivate them to perform together, mainly the desire to play. Play, for them, is its own reward. They aim to collaborate in the moment of performance to create something fresh, rather than display their instrumental technique or present music that has been preconceived. An appreciation of this motivation is needed to understand their interactions in concert. Audience members were also interviewed after every performance. They each experienced the concerts differently, in a way that reflects their preoccupations and interests as much as it reflects the concert event. The research thus provides a view of individuals and their differences that contrasts with the body of music research focused on common experiences within particular musical cultures and the acquisition of the skills required to participate in those cultures. This practice-led research project was allowed to develop and find focus gradually in cycles of performances, interviews and analysis of interview transcripts, concurrent with an ongoing exploration of texts about doing research. Various interactions – during the performances and interviews, between the researcher and the interview transcripts and between the researcher and research texts – contributed to the project’s development. These interactions can be thought of as play between foreknowledge and the unknown. Accordingly, play as described by the musicians and as defined in hermeneutics, was actively pursued as a way of developing an appropriate methodology for the project

    A Fragmented Parallel Stream: The Bass Lines of Eddie Gomez in the Bill Evans Trio

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    Eddie Gomez was the bassist in the Bill Evans Trio for eleven years. His contribution to the group’s sound was considerable, but while there has been some recognition of his virtuoso solos in the trio there has been little academic interest in his bass lines. This essay examines bass lines from the album Since We Met, recorded in 1974 by Evans, Gomez and drummer Marty Morell. Analysis of the bass accompaniments to the piano solos on “Since We Met” and “Time Remembered” reveals that they form a fragmented two-feel. A traditional two-feel employs two notes to emphasise the first and third beats in bar of 4/4 time. In Gomez’s bass lines these two notes are frequently replaced with short rhythmic motifs. These motifs occur in a variety of forms and at different metric displacements that alternately propel and retard the forward motion of the music. Additionally, Gomez uses a wide range of register and varied articulations to create a richly diverse bass line. The resulting effect has often been interpreted as interactive or conversational with the soloist. However there is very little interaction between the bass line and Evans’ solo. The bass line is a parallel stream to the solo that energises and colours the music

    Large expert-curated database for benchmarking document similarity detection in biomedical literature search

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    Document recommendation systems for locating relevant literature have mostly relied on methods developed a decade ago. This is largely due to the lack of a large offline gold-standard benchmark of relevant documents that cover a variety of research fields such that newly developed literature search techniques can be compared, improved and translated into practice. To overcome this bottleneck, we have established the RElevant LIterature SearcH consortium consisting of more than 1500 scientists from 84 countries, who have collectively annotated the relevance of over 180 000 PubMed-listed articles with regard to their respective seed (input) article/s. The majority of annotations were contributed by highly experienced, original authors of the seed articles. The collected data cover 76% of all unique PubMed Medical Subject Headings descriptors. No systematic biases were observed across different experience levels, research fields or time spent on annotations. More importantly, annotations of the same document pairs contributed by different scientists were highly concordant. We further show that the three representative baseline methods used to generate recommended articles for evaluation (Okapi Best Matching 25, Term Frequency-Inverse Document Frequency and PubMed Related Articles) had similar overall performances. Additionally, we found that these methods each tend to produce distinct collections of recommended articles, suggesting that a hybrid method may be required to completely capture all relevant articles. The established database server located at https://relishdb.ict.griffith.edu.au is freely available for the downloading of annotation data and the blind testing of new methods. We expect that this benchmark will be useful for stimulating the development of new powerful techniques for title and title/abstract-based search engines for relevant articles in biomedical research.Peer reviewe

    Genomic epidemiology of SARS-CoV-2 in a UK university identifies dynamics of transmission

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    AbstractUnderstanding SARS-CoV-2 transmission in higher education settings is important to limit spread between students, and into at-risk populations. In this study, we sequenced 482 SARS-CoV-2 isolates from the University of Cambridge from 5 October to 6 December 2020. We perform a detailed phylogenetic comparison with 972 isolates from the surrounding community, complemented with epidemiological and contact tracing data, to determine transmission dynamics. We observe limited viral introductions into the university; the majority of student cases were linked to a single genetic cluster, likely following social gatherings at a venue outside the university. We identify considerable onward transmission associated with student accommodation and courses; this was effectively contained using local infection control measures and following a national lockdown. Transmission clusters were largely segregated within the university or the community. Our study highlights key determinants of SARS-CoV-2 transmission and effective interventions in a higher education setting that will inform public health policy during pandemics.</jats:p

    State of the climate in 2010

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    Several large-scale climate patterns influenced climate conditions and weather patterns across the globe during 2010. The transition from a warm El Nino phase at the beginning of the year to a cool La Nina phase by July contributed to many notable events, ranging from record wetness across much of Australia to historically low Eastern Pacific basin and near-record high North Atlantic basin hurricane activity. The remaining five main hurricane basins experienced below-to well-below-normal tropical cyclone activity. The negative phase of the Arctic Oscillation was a major driver of Northern Hemisphere temperature patterns during 2009/10 winter and again in late 2010. It contributed to record snowfall and unusually low temperatures over much of northern Eurasia and parts of the United States, while bringing above-normal temperatures to the high northern latitudes. The February Arctic Oscillation Index value was the most negative since records began in 1950. The 2010 average global land and ocean surface temperature was among the two warmest years on record. The Arctic continued to warm at about twice the rate of lower latitudes. The eastern and tropical Pacific Ocean cooled about 1 C from 2009 to 2010, reflecting the transition from the 2009/10 El Nino to the 2010/11 La Nina. Ocean heat fluxes contributed to warm sea surface temperature anomalies in the North Atlantic and the tropical Indian and western Pacific Oceans. Global integrals of upper ocean heat content for the past several years have reached values consistently higher than for all prior times in the record, demonstrating the dominant role of the ocean in the Earth's energy budget. Deep and abyssal waters of Antarctic origin have also trended warmer on average since the early 1990s. Lower tropospheric temperatures typically lag ENSO surface fluctuations by two to four months, thus the 2010 temperature was dominated by the warm phase El Nino conditions that occurred during the latter half of 2009 and early 2010 and was second warmest on record. The stratosphere continued to be anomalously cool. Annual global precipitation over land areas was about five percent above normal. Precipitation over the ocean was drier than normal after a wet year in 2009. Overall, saltier (higher evaporation) regions of the ocean surface continue to be anomalously salty, and fresher (higher precipitation) regions continue to be anomalously fresh. This salinity pattern, which has held since at least 2004, suggests an increase in the hydrological cycle. Sea ice conditions in the Arctic were significantly different than those in the Antarctic during the year. The annual minimum ice extent in the Arctic reached in September was the third lowest on record since 1979. In the Antarctic, zonally averaged sea ice extent reached an all-time record maximum from mid-June through late August and again from mid-November through early December. Corresponding record positive Southern Hemisphere Annular Mode Indices influenced the Antarctic sea ice extents. Greenland glaciers lost more mass than any other year in the decade-long record. The Greenland Ice Sheet lost a record amount of mass, as the melt rate was the highest since at least 1958, and the area and duration of the melting was greater than any year since at least 1978. High summer air temperatures and a longer melt season also caused a continued increase in the rate of ice mass loss from small glaciers and ice caps in the Canadian Arctic. Coastal sites in Alaska show continuous permafrost warming and sites in Alaska, Canada, and Russia indicate more significant warming in relatively cold permafrost than in warm permafrost in the same geographical area. With regional differences, permafrost temperatures are now up to 2 C warmer than they were 20 to 30 years ago. Preliminary data indicate there is a high probability that 2010 will be the 20th consecutive year that alpine glaciers have lost mass. Atmospheric greenhouse gas concentrations continued to rise and ozone depleting substances continued to decrease. Carbon dioxide increased by 2.60 ppm in 2010, a rate above both the 2009 and the 1980-2010 average rates. The global ocean carbon dioxide uptake for the 2009 transition period from La Nina to El Nino conditions, the most recent period for which analyzed data are available, is estimated to be similar to the long-term average. The 2010 Antarctic ozone hole was among the lowest 20% compared with other years since 1990, a result of warmer-than-average temperatures in the Antarctic stratosphere during austral winter between mid-July and early September

    Sea Level Variability and Change

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    Land surface albedo represents the fraction of solar radiation scattered backward by land surfaces. In the presence of vegetation, surface albedo results from complex nonlinear radiation transfer processes determining the amount of radiation that is scattered by the vegetation and its background, transmitted through the vegetation layer, or absorbed by the vegetation layer and its background. Anomalies in mid- and high latitude regions of the Northern Hemisphere result mainly from interannual variations in snow cover extent and duration in winter and spring. The large negative anomalies over the United States reflect the lack of snowfall and snowpack over the Rockies, the Midwest, and much of the eastern half of the country.JRC.H.7-Climate Risk Managemen
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