Interpersonal synchronization in ensemble singing: the roles of visual contact and leadership, and evolution across rehearsals

Interpersonal synchronization between musicians in Western ensembles is a fundamental performance parameter, contributing to the expressiveness of ensemble performances. Synchronization might be affected by the visual contact between musicians, leadership, and rehearsals, although the nature of these relationships has not been fully investigated. This thesis centres on the synchronization between singers in a cappella singing ensembles, in relation to the roles of visual cues and leadership instruction in 12 duos, and the evolution of synchronization and leader-follower relationships emerging spontaneously across five rehearsals in a newly formed quintet. In addition, the developmental aspects of synchronization are investigated in parallel to tuning and verbal interactions, to contextualise synchronization within the wider scope of expressive performance behaviours. Three empirical investigations were conducted to study synchronization in singing ensembles, through a novel algorithm developed for this research, based on the application of electrolaryngography and acoustic analysis. Findings indicate that synchronisation is a complex issue in terms of performance and perception. Synchronization was better with visual contact between singers than without in singing duos, and improved across rehearsals in the quintet depending on the piece performed. Leadership instruction did not affect precision or consistency of synchronization in singing duos; however, when the upper voice was instructed to lead, the designated leader preceded the co-performer. Leadership changed across rehearsals, becoming equally distributed in the last rehearsal. Differences in the precision of synchronization related to altered visual contact were reflected in the perception of synchronization irrespective of the listeners’ music expertise, but the smaller asynchrony patterns measured across rehearsals were not. Synchronization in the quintet was not the result of rehearsal strategies targeted for the purpose of synchronization during rehearsal, but was paired with a tendency to tune horizontally towards equal temperament (ET), and to ET and just intonation in the vertical tuning of third intervals

Social business and social innovation: the Brazilian experience

Purpose – The aim of this article is to contribute to the field of social businesses, particularly considering the dimension of social innovation. Design/methodology/approach – The authors adopted a qualitative approach, whose purpose is to gather in-depth insights into a problem to understand its contextual elements and interrelations. The authors used an exploratory descriptive design and a multiple case study, which allows the identification of similarities and differences in the research subjects. They developed a scale that enables the classification of the operation logic of the social businesses analyzed. Findings – It became evident that social businesses present a few differences in their modus operandi: those based on a social logic are more concerned with the generation of socio-environmental value, however with small-scale innovation; in contrast, social business guided by a market logic do not intend to generate socioenvironmental value in different dimensions and are more concerned with the wider range of their innovations. Research limitations/implications – This research analyzed social businesses from a founder and manager perspective and did not comprise all stakeholders. The purpose of this study was not to measure the effective impact generated by innovation, but to understand its potential to generate socioenvironmental value. Practical implications – The generation of socio-environmental value and the strategies to expand practices of social innovation are associated with the operation logic of social business. Originality/value – The created scale allowed the classification of social businesses in terms of operation logic (greater emphasis on market or social aspects) and proposes a few dimensions to evaluate a socioenvironmental innovation. &nbsp

Extracción y caracterización de compuestos bioactivos remanentes en orujos y su utilización en la industria alimentaria con fines tecnológicos

La industria vitivinícola genera un volumen importante de subproductos, entre ellos el orujo, que es la mezcla de hollejos y semillas remanente luego de la fermentación del vino. En las últimas décadas, por razones tanto económicas como ambientales, ha habido una demanda continua y creciente en la recuperación y aprovechamiento de los subproductos de la industria alimentaria. El objetivo de este trabajo fue recuperar y caracterizar compuestos bioactivos presentes en orujos de variedades de vid cultivadas en la provincia de Mendoza (Malbec, Cabernet Sauvignon, Cabernet Franc y Merlot). Inicialmente, se obtuvo un extracto de orujo de uva liofilizado mediante una técnica de extracción sólido-líquido. Dicho extracto fue caracterizado inicialmente mediante la determinación de la capacidad antioxidante a través de la técnica ORAC, y el contenido total de polifenoles y antocianos a través de espectrofotometría UV-vis. Posteriormente, se realizó un perfilado de compuestos fenólicos, identificando y cuantificando 30 compuestos, de los cuales 17 fueron no antocianos y 13 antocianos. En cuanto a los compuestos no antocianos, las máximas concentraciones correspondieron a los flavonoides: (-)-epicatequina (5518 mg g-1), (+)-catequina (5340 mg g-1), procianidina B1 (1820 mg g-1) y ácido siríngico (6665 mg g-1). Malvidina-3-O-glucósido fue el antociano más abundante (32.056 mg g-1). El compuesto OH-tirosol se identificó y cuantificó por primera vez en orujos de Cabernet Franc y Malbec. Por otra parte, el estilbeno trans-resveratrol se encontró en niveles elevados (328 mg g-1) en Malbec comparado con reportes previos en otras variedades, destacando así la potencialidad de la variedad como una fuente de compuestos con valor nutracéutico. Además, se presenta una discusión sobre la relación entre los elevados niveles de ácido siríngico y malvidina-3-O-glucósido. Con los resultados obtenidos, se generaron nuevos conocimientos para poder seleccionar el orujo más adecuado en función a cada aplicación. Esta información puede ser útil para la aplicación tecnológica de los extractos y para justificar los efectos benéficos obtenidos cuando son utilizados en diferentes modelos experimentales.Fil: D’Amario, María Agustina. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias

Radon concentration in self-bottled mineral spring waters as a possible public health issue

Since 2013, the Council Directive 2013/51/Euratom has been regulating the content of radioactive substances in water intended for human consumption. However, mineral waters are exempted from this regulation, including self-bottled springs waters, where higher radon concentration are expected. Therefore, a systematic survey has been conducted on all the 33 mineral spring waters of Lazio (a region of Central Italy) in order to assess if such waters, when self-bottled, may be of concern for public health. Waters have been sampled in two different ways to evaluate the impact of bottling on radon concentration. Water sampling was possible for 20 different spring waters, with 6 samples for each one. The results show that 2 (10%) of measured mineral spring waters returned radon concentrations higher than 100 Bq L−1, i.e., the parametric value established by the Council Directive. These results, if confirmed by other surveys involving a higher number of mineral spring waters, would suggest regulating also these waters, especially in countries like Italy for which: (i) mineral water consumption is significant; (ii) mineral concession owners generally allow the consumers to fill bottles and containers, intended for transport and subsequent consumption, directly from public fountains or from fountains within the plant; (iii) the consumers’ habit of drinking self-bottled mineral water is widespread

Brief Tale of a Bacteraemia by Rhodococcus equi, With Concomitant Lung Mass: What Came First, the Chicken or The Egg?

Rhodococcus equi is an uncommon Gram positive, variably acid-fast pathogen, that appears as hard to treat mostly owing to the establishment of intracellular niches. Lack of interpretive criteria for susceptibility testing may lead to under-reporting or overestimation of resistances, whereas knowledge about this pathogen’s clinical impact may be affected by erroneous phenotype-based characterization at a genus and species level

Orthodontic brackets removal: morphological in vitro evaluation

Debonding procedure is a fundamental stage in the orthodontic treatment (1). Adhesive removal should lead to a complete polished enamel in order to prevent the plaque accumulation and enamel injures (2). Aim of this study is to evaluate in vitro by use of Scanning Electron Microscopy (SEM) the enamel surface after the bracket removal and the enamel polishing with four different techniques. Two groups of teeth, group A (n=12) and group B (n=12) were evaluated. The images were analyzed by the Image J software. After the debonding procedure the two groups were subcategorized in four groups (1A, 1B, 2A, 2B 3A, 3B and 4A, 4B, n.=3). The discriminant between the two main categories was the use of a magnification system (Group A) during the polishing stages. From the qualitative and quantitative images analysis the most conservative technique resulted to be the use of tungsten carbide bur, followed by the final polishing using the soft-polisher tip for composites. In group A, the percentage of the residual adhesive resulted 8% and the damages on the enamel surface showed to be 7%. In group B the percentage of the residual adhesive resulted 35% and the damages on the enamel surface showed to be 15%. This analysis showed how the use of a magnification system aids in significant way during the debonding procedures in the enamel surfaces’ preservation.The authors are grateful to Dr. M. Gianmatteo and to Dr. E. Nazaj, University of L’Aquila, for their help in the sampling and microscopy procedures

Galileo dust data from the jovian system: 2000 to 2003

The Galileo spacecraft was orbiting Jupiter between Dec 1995 and Sep 2003. The Galileo dust detector monitored the jovian dust environment between about 2 and 370 R_J (jovian radius R_J = 71492 km). We present data from the Galileo dust instrument for the period January 2000 to September 2003. We report on the data of 5389 particles measured between 2000 and the end of the mission in 2003. The majority of the 21250 particles for which the full set of measured impact parameters (impact time, impact direction, charge rise times, charge amplitudes, etc.) was transmitted to Earth were tiny grains (about 10 nm in radius), most of them originating from Jupiter's innermost Galilean moon Io. Their impact rates frequently exceeded 10 min^-1. Surprisingly large impact rates up to 100 min^-1 occurred in Aug/Sep 2000 when Galileo was at about 280 R_J from Jupiter. This peak in dust emission appears to coincide with strong changes in the release of neutral gas from the Io torus. Strong variability in the Io dust flux was measured on timescales of days to weeks, indicating large variations in the dust release from Io or the Io torus or both on such short timescales. Galileo has detected a large number of bigger micron-sized particles mostly in the region between the Galilean moons. A surprisingly large number of such bigger grains was measured in March 2003 within a 4-day interval when Galileo was outside Jupiter's magnetosphere at approximately 350 R_J jovicentric distance. Two passages of Jupiter's gossamer rings in 2002 and 2003 provided the first actual comparison of in-situ dust data from a planetary ring with the results inferred from inverting optical images.Comment: 59 pages, 13 figures, 6 tables, submitted to Planetary and Space Scienc

Carbohydrate Antigen 125: A Biomarker at the Crossroads of Congestion and Inflammation in Heart Failure

Because heart failure (HF) is more lethal than some of the common malignancies in the general population, such as prostate cancer in men and breast cancer in women, there is a need for a cost-effective prognostic biomarker in HF beyond natriuretic peptides, especially concerning congestion, the most common reason for the hospitalisation of patients with worsening of HF. Furthermore, despite diuretics being the mainstay of treatment for volume overload in HF patients, no randomised trials have shown the mortality benefits of diuretics in HF patients, and appropriate diuretic titration strategies in this population are unclear. Recently, carbohydrate antigen (CA) 125, a well-established marker of ovarian cancer, emerged as both a prognostic indicator and a guide in tailoring decongestion therapy for patients with HF. Hence, in this review the authors present the molecular background regarding the role of CA125 in HF and address valuable clinical aspects regarding the relationship of CA125 with both prognosis and therapeutic management in HF

Photoelectrochemical properties of mesoporous NiOx deposited on technical FTO via nanopowder sintering in conventional and plasma atmospheres

Nanoporous nickel oxide (NiO x ) has been deposited with two different procedures of sintering (CS and RDS). Both samples display solid state oxidation at about 3.1 V vs Li+/Li. Upon sensitization of CS/RDS NiO x with erythrosine b (ERY), nickel oxide oxidation occurs at the same potential. Impedance spectroscopy revealed a higher charge transfer resistance for ERY-sensitized RDS NiO x with respect to sensitized CS NiO x . This was due to the chemisorption of a larger amount of ERY on RDS with respect to CS NiO x . Upon illumination the photoinduced charge transfer between ERY layer and NiO x could be observed only with oxidized CS. Photoelectrochemical effects of sensitized RDS NiO x were evidenced upon oxide reduction. With the addition of iodine RDS NiOx electrodes could give the reduction iodine → iodide in addition to the reduction of RDS NiO x . p-type dye sensitized solar cells were assembled with RDS NiO x photocathodes sensitized either by ERY or Fast Green. Resulting overall efficiencies ranged between 0.02 and 0.04 % upon irradiation with solar spectrum simulator (Iin : 0.1 W cm −2 )

A New Method of Onset and Offset Detection in Ensemble Singing

This paper presents a novel method combining electrolaryngography and acoustic analysis to detect the onset and offset of phonation as well as the beginning and ending of notes within a sung legato phrase, through the application of a peak-picking algorithm, TIMEX. The evaluation of the method applied to a set of singing duo recordings shows an overall performance of 78% within a tolerance window of 50 ms compared with manual annotations performed by three experts. Results seem very promising in light of the state-of-the-art techniques presented at MIREX in 2016 yielding an overall performance of around 60%. The new method was applied to a pilot study with two duets to analyse synchronization between singers during ensemble performances. Results from this investigation demonstrate bidirectional temporal adaptations between performers, and suggest that the precision and consistency of synchronization, and the tendency to precede or lag a co-performer might be affected by visual contact between singers and leader–follower relationships. The outcomes of this paper promise to be beneficial for future investigations of synchronization in singing ensembles