Advanced Conducting Project

At the Round Earth\u27s Imagined Corners by Williametta Spencer Credo in unum deum (from Great Mass in C minor) by W.A. Mozart We Shall Walk Through the Valley in Peace (Traditional Spiritual), arranged by Moses Hogan Ascribe to the Lord by Rosephanye Powell The Tiger by Lauren Bernofsky Laudate Dominum by Dan Davison Down to the River to Pray (Traditional), arranged by Philip Lawson

Basic psychological needs support in the high school choral classroom: student and teacher perspectives

Literature suggests that secondary choral educators can and should strive to meet their students’ basic psychological needs for relatedness, autonomy, and competence during choral rehearsals. Music education researchers have given much attention to outcomes correlated with basic psychological needs fulfillment, such as well-being, motivation, and persistence intentions (Bonneville-Roussy et al., 2013; Evans et al., 2013; Freer & Evans, 2017, 2019; Legutki, 2010; Liu, 2016); however, researchers have paid little attention to comparing music teacher and student perceptions of teachers’ success at supporting the fulfillment of students’ basic psychological needs. Using Basic Psychological Needs Theory (Deci & Ryan, 2000) as the framework for my study, I examined teachers’ and students’ perceptions of teachers’ provision of basic psychological needs support in high school choral classrooms. Adapting the previously developed Perceived Teacher Needs Support scale (Freer & Evans, 2019) for use by both teachers and students, I surveyed 26 choral teachers and 1,082 high school choral students within a single district of a state music educators association in a suburban region of the Northeast United States, with a response rate of 68.09%. Survey responses indicated that high school choral teachers and students do perceive teachers as providing support for the fulfillment of students’ basic psychological needs within the choral rehearsal environment; however, teachers’ self-perceptions of their support-provision exceeded students’ perceptions of that support. Correlational analyses and z tests comparing mean differences between student and teacher scores revealed differences between students’ and teachers’ perceptions of basic psychological needs support for competence (z = 2.36, p = .018, d = 0.46), autonomy (z = 2.2, p = .028, d = 0.43), and relatedness (z = 1.21, p = .225, d = 0.24) (overall z = 2.1, p = .036, d = 0.41). Analyses of variance (ANOVA) among students’ scores indicated that a student’s school (each with a unique choral director) exhibited a greater effect (ACR ƞ2 = .19, autonomy ƞ2 = .2, competence ƞ2 = .2, and relatedness ƞ2 = .15) than a student’s ensemble level, grade level, or pronouns, in relation to a student’s perceptions of their teacher’s support-provision for autonomy, competence, and relatedness. This study extends existing BPNT research by comparing student and teacher perceptions of basic psychological needs support within a music ensemble rehearsal setting. Recommendations for teachers include offering students greater challenges, more individualized feedback, and opportunities for democratic decision-making and student leadership. Recommendations for further study are provided

Diversity and distribution of epiphytic bromeliads in a Brazilian subtropical mangrove

It is not unusual to find epiphytic bromeliads in mangroves, but most studies on mangrove vegetation do not record their presence. This study aimed to evaluate the diversity and distribution of epiphytic bromeliads in a subtropical mangrove. The richness, abundance and life form (atmospheric and tank) of bromeliads were recorded and compared among host tree species and waterline proximity. The effects of diameter and height of host trees on the abundance of bromeliads were also assessed. The mangrove was composed of Avicennia schaueriana, Laguncularia racemosa and Rhizophora mangle. We recorded seven bromeliad species of the genera Tillandsia and Vriesea. The waterline proximity did not affect the abundance or diversity of bromeliads, but atmospheric forms were predominant near the waterline, whereas tank bromeliads were more frequent in the interior of the mangrove. The three mangrove species hosted bromeliads, but L. racemosa was the preferred host. The species composition showed that the distribution of bromeliads is more related to the host species than to the distance from the waterline. Bromeliad abundance increased with tree size. Bromeliads can be biological indicators of ecosystem health; therefore, inventories and host tree preferences are necessary knowledge for an adequate management of sensitive ecosystems as mangroves.Facultad de Ciencias Naturales y Muse

Levantamento da qualidade das sementes de aveia preta (Avena strigosa) e azevém (Lolium multiflorum) no Rio Grande do Sul.

SIEPE

Analysis of Acoustic Emission Activity during Progressive Failure in Heterogeneous Materials: Experimental and Numerical Investigation

This work focuses on an experimental and numerical investigation into monitoring damage in a cube-shaped concrete specimen under compression. Experimental monitoring uses acoustic emission (AE) signals acquired by two independent measurement apparatuses, and the same damage process is numerically simulated with the lattice discrete element method (LDEM). The results from the experiment and simulation are then compared in terms of their failure load, final configurations, and the evolution of global parameters based on AE signals, such as the b-value coefficient and the natural time approach. It is concluded that the results from the AE analysis present a significant sensitivity to the characteristics of the acquisition systems. However, natural time methods are more robust for determining such differences, indicating the same general tendency for all three data sets

Levantamento de dados sobre produção e mercado de sementes forrageiras de clima temperado na região da Campanha do Rio Grande do Sul.

SIEPE

How mollusk assemblages respond to different urbanization levels: characterization of the malacofauna in subtropical Brazilian mangroves

This study aimed to describe the composition of mollusk assemblages in subtropical Brazilian mangroves with different levels of urbanization in their watersheds. Mangroves are important ecosystems, which are vanishing worldwide due to human impacts. The knowledge about the consequences of human pressure on the fauna of these ecosystems is still incipient. In addition, although Brazil is the country with the second largest mangrove area, there is a lack of studies on the mangrove fauna in this country. Mollusks are the second most abundant group of mangrove invertebrates and can be useful indicators of mangrove health. For this reason, mollusk species were assessed in two mangroves surrounded by a dense human population and in two mangroves away from urban centers. A total of 3820 individuals, representing 15 species, were sampled. The results revealed that the mollusk abundance, diversity estimators, and sediment organic matter content were not good indicators of the effects of urbanization on the mangroves studied. However, the species composition of mollusk assemblages differed according to the urbanization level. This survey of the mangrove malacofauna represents another step toward the effort to investigate and conserve the fauna of these important estuarine environments.Instituto de Limnología "Dr. Raúl A. Ringuelet

Long-Range Correlations and Natural Time Series Analyses from Acoustic Emission Signals

This work focuses on analyzing acoustic emission (AE) signals as a means to predict failure in structures. There are two main approaches that are considered: (i) long-range correlation analysis using both the Hurst (H) and the detrended fluctuation analysis (DFA) exponents, and (ii) natural time domain (NT) analysis. These methodologies are applied to the data that were collected from two application examples: a glass fiber-reinforced polymeric plate and a spaghetti bridge model, where both structures were subjected to increasing loads until collapse. A traditional (AE) signal analysis was also performed to reference the study of the other methods. The results indicate that the proposed methods yield reliable indication of failure in the studied structures