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"Drum"
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I Drum, Therefore I Am
Despite their central role in many forms of music-making, drummers have been largely neglected in the scholarly literature on music and education. Drawing on data collected from in-depth interviews and questionnaires, Gareth Dylan Smith explores the identities, practices and learning of teenage and adult kit drummers in and around London. As a London-based drummer and teacher of drummers, Smith uses his own identity as participant-researcher to inform and interpret other drummers' accounts of their experiences. Drummers drum; therefore they are, they do, and they learn - in a rich tapestry of means and contexts.
eBook
Long-term acoustic monitoring of fish calling provides baseline estimates of reproductive timelines in the May River estuary, southeastern USA
In this study, our goal was to perform acoustic monitoring of the May River, South Carolina (USA), for a 9 mo period and estimate reproductive timelines for a community of soniferous fishes. Acoustic recorders were deployed to collect sound samples for 2 min, every 20 min at 4 stations from the source to the mouth from February to November 2013. We detected the acoustic presence of 6 fish species: Atlantic croaker Micropogonias undulatus, black drum Pogonias cromis, silver perch Bairdiella chrysoura, oyster toadfish Opsanus tau, spotted seatrout Cynoscion nebulosus, and red drum Sciaenops ocellatus. Acoustic detection rates and diversity of soniferous fish were higher near the mouth and decreased towards the source, suggesting a selection of deeper water and/or more stable water quality conditions for spawning. We estimated the start and end dates of the spawning season and calculated the total hours of chorusing for silver perch, oyster toadfish, spotted seatrout, and red drum. Each species followed a specific seasonal and daily pattern of calling, and we observed synchrony of these calling patterns among stations. For silver perch, oyster toadfish, black drum, and spotted seatrout, a negative temperature anomaly correlated with decreased calling intensity, while a positive anomaly increased sound production. For oyster toadfish and spotted seatrout, the lunar phase significantly influenced calling. These data serve as a foundation for future studies that are investigating how climate variability may affect seasonal spawning timelines and year class strength of fish populations using passive acoustic monitoring.
Journal Article
Drum city
A young boy begins banging on pots and pans in his front yard, enticing other children to join him, and before long the entire city is feeling the beat.
Book
West African Drumming and Dance in North American Universities
More than twenty universities and twenty other colleges in North America (USA and Canada) offer performance courses on West African ethnic dance drumming. Since its inception in 1964 at both UCLA and Columbia, West African drumming and dance has gradually developed into a vibrant campus subculture in North America. The dances most practiced in the American academy come from the ethnic groups Ewe, Akan, Ga, Dagbamba, Mande, and Wolof, thereby privileging dances mostly from Ghana, Togo, Benin, Senegal, Mali, Guinea, and Burkina Faso. This strong presence and practice of a world music ensemble in the diaspora has captured and engaged the interest of scholars, musicians, dancers, and audiences.
In the first-ever ethnographic study of West African drumming and dance in North American universities the author documents and acknowledges ethnomusicologists, ensemble directors, students, administrators, and academic institutions for their key roles in the histories of their respective ensembles. Dor collates and shares perspectives including debates on pedagogical approaches that may be instructive as models for both current and future ensemble directors and reveals the multiple impacts that participation in an ensemble or class offers students. He also examines the interplay among historically situated structures and systems, discourse, and practice, and explores the multiple meanings that individuals and various groups of people construct from this campus activity. The study will be of value to students, directors, and scholars as an ethnographic study and as a text for teaching relevant courses in African music, African studies, ethnomusicology/world music, African diaspora studies, and other related disciplines.
eBook
Coal falling trajectory and strength analysis of drum of shearer based on a bidirectional coupling method
The cutting and crushing of coal and rock containing gangue is the result of the coupling effect of multiple factors. The geometric parameters of the working mechanism, the kinematic parameters of the shearer, and the physical and mechanical properties of the coal and rock to be cut all affect the cutting and crushing process of the shearer. To study the coal falling trajectory of cutting coal and rock using a spiral drum, optimal cutting parameters were obtained, efficient cutting using a spiral drum was achieved, and analysis of the coal falling trajectory and strength of the drum of a shearer based on bidirectional coupling technology was proposed based on particle discrete element contact theory and virtual prototype technology. The discrete element method multi-flexible body dynamics two-way coupling method was used to obtain cutting and interactive information about the spiral drum for a complex coal seam with gangue. The cutting conditions of the spiral drum under different cutting depths, rotational speeds, and traction speeds were determined. The movement status of coal and rock particles was monitored under different working conditions. Coal falling trajectory equations for the coal and rock particles were compiled under different working conditions, and the coal falling trajectory curve was drawn. The optimal coal loading rate was used as the measurement standard for the coal falling trajectory, and the optimal coal falling trajectory of the drum was obtained through full factor experiments. The load of the drum and pick was extracted, their stress and deformation were analyzed, and fatigue life analysis was performed on the pick with the highest stress. The results indicate that the maximum deformation occurs on the cutting teeth that are cutting hard gangue. The stress of the tooth seat is mainly concentrated at the root of the tooth seat, and its maximum equivalent stress is less than the yield limit value of the selected material. Therefore, the material selection and structural design of the drum are safe and reliable. By building a coal mining machine cutting coal and rock experimental platform and monitoring the working status of the designed spiral drum, it meets the usage requirements. Based on industrial experiments conducted underground, the measured average coal loading rate of the shearer drum was 46.31%, achieving stable operation and verifying that the designed drum of the shearer has an efficient cutting ability.
Journal Article
Pokko and the drum
When Pokko plays her drum in the forest she suddenly finds herself surrounded by an entire band of animal musicians.
Book
The Performance Analysis of Elevator Brake
Abstract In order to understand the safety status of traction drive elevator brake, taking the most common drum brake as the research object, several common failure forms of drum brake and the problems found in brake disassembly are summarized and sorted out. Based on the analysis of failure causes, suggestions on the use and maintenance of elevator brakes are put forward, and the in-service elevator brakes which have been used for a certain period of time are tested, and the performance characteristics of the in-service elevator brakes are analyzed, which provides a basis for the promotion of hidden trouble investigation and rectification of elevator brakes.
Journal Article