Some remarks on Hall algebra of bound quiver

In this paper we describe the twisted Hall algebra of bound quiver with small homological dimension. The description is given in the terms of the quadratic form associated with the corresponding bound quiver

HM 26: The Hattendorf Prize Lectures, Volume 1: 2011–2019

Let this volume serve three purposes. First, it is an example of naval history done well. All the essays were written by distinguished scholars, and they demonstrate the best of the field. They look beyond operations, integrating sea power into larger frameworks; they revel in complexity, rejecting simple explanations; and most of all, they ask the right questions. The lectures also demonstrate the enduring relevance of sea power theory. Mahan is not enough, but—thanks in part to the prize laureates—no one is suggesting that he is. Understanding the parameters of the historical debates, as well as their limitations, is essential for all those interested in naval history.https://digital-commons.usnwc.edu/usnwc-historical-monographs/1025/thumbnail.jp

An Analysis of Beginning Percussion Education Through Wind Band Repertoire and Method Books

The challenges of studying percussion at an early age are numerous, as students must navigate a multitude of techniques on different instruments. Given these challenges, coupled with potentially substandard percussion training for band directors and issues of exposure in the classroom, it is common for the student percussionist to acquire considerable weaknesses, even at a young age. However, with the correct guidance through educational materials, all beginning percussionists have the opportunity to develop into well-rounded musicians. This study aimed to define what instruments and technical concepts have been overlooked in the pedagogy of beginning percussionists. Included in this document are two sets of analyses. The first surveyed recent trends in instrumentation and techniques in grade one band literature. The subsequent analysis judged whether the available beginning method books adequately addressed basic competencies required by the analyzed repertoire. By the end of this survey it was strongly suggested that there existed a disconnect between the method books and the repertoire. In addition to identifying which concepts were underrepresented, pedagogical strategies to adequately prepare today’s student for success in beginning wind band were offered to the band director

Development of Endogenous Tagging Plasmids for Characterization of Protein Interactions, Localization, and Post-Translational Modifications of Tetrahymena Thermophila Rad23

Rad23 is a protein involved in both nucleotide excision repair (NER) and proteasome-mediated degradation, and has been suggested to facilitate interactions between these two pathways. The model organism Tetrahymena thermophila, which has a transcriptionally silent micronucleus, provides a useful platform for studying the role of Rad23 in global genome NER (GG-NER). However, the ectopic expression systems used thus far in T. thermophila to study Rad23 are repressed by UV light and do not account for the background expression of endogenous RAD23; these phenomena prevent insightful gains to the true dynamics of Rad23. In this thesis, endogenous tagging cassettes have been designed to allow for the tagging of endogenous RAD23 or any other T. thermophila gene to circumvent the issues inherent to ectopic expression. Additionally, a plasmid has been made to facilitate the genetic knockout of RAD23 in T. thermophila. Basic phylogeny and expression analysis of RAD23 were also performed to better characterize this protein in T. thermophila. The tools designed in this study will aid future researchers in the genetic manipulation of T. thermophila

Adoption of soil organic carbon-enhancing practices: A case of two watershed sites in Ethiopia.

This study aimed at identifying the factors that determine the decision to adopt and the intensity of adoption of soil organic carbon (SOC)-enhancing practices using two watershed sites in Ethiopia: Yiser (Amhara region) and Azugashube (Southern region). The study used survey data collected from 379 sample households drawn from four Kebele/village administrations at each watershed site. Multivariate and ordinary least squares regressions were used to identify the factors that determine the decision to adopt the SOC-enhancing practices and the factors that determine the extent of adoption of these practices, respectively. The study classified these various practices into three classes: soil and water conservation, agronomic, and agroforestry SOC-enhancing practices. We find that the decision to adopt soil and water conservation practices is negatively related to both the decision to adopt agronomic and to adopt agroforestry SOC-enhancing practices. On the contrary, we find that the decision to adopt agronomic and agroforestry practices is complementary. The study also identified diverse agroecological, farming system, institutional, and household characteristics that determine the decision to adopt and the intensity of adoption of the three SOCenhancing practices. Among the different variables, the study found location as a strong determinant of the type and intensity of adoption of the SOC practices