Effects of fog droplets on wake vortex decay rate

A simple model for the motion of particles in a laminar line vortex is discussed. The energy required to accelerate a set of these particles was determined and shown to be only a small fraction of the energy content of the vortex flow. It is shown that this energy transfer is unlikely to be sufficient to significantly modify the vortex decay rate. It is further argued that the effect of the particle on the viscous properties of the resulting two phase fluid leads to a slower decay rate than in single phase air flow. However, this conclusion may not necessarily follow for turbulence flows. Results show that the migration of particles to the outer flow results in a redistribution of the velocity profile in the vortex and in a non-uniform two phase viscosity across the core. It is suggested that these effects may accelerate vortex bursting

The Blooming Bright Star of Belle Isle: American Native or Irish Immigrant?

John Moulden, qui sintéresse à la chanson folklorique irlandaise, décrit la méthodologie qui Va méné à la conclusion que “The Blooming Bright Star o f Belle Isle,” autrefois considérée comme adaptation terreneuvienne d'une chanson irelandais, était, en fait, importée directement de Irelande. On trouve les noms de lieux “Belle Isle” et “Lough Erne” en Irelande, où lon a receuilli deux versions de la chanson. Ces deux textes mentionnent le port de St-Jean (Terre-Neuve), port bien connu par les immigrants irelandais

An Investigation into the effects of COVID-related school policies on the teaching and learning of English as a second or foreign language

The purpose of this study was to examine the impact of COVID-related campus access restrictions on the teaching and learning of English as a second or additional language. A mixed-methods survey of ESL teachers, followed by optional structured interviews, was chosen as the research design. Results showed that the requirement to move instruction wholly, or partially, to an online format created emotional and cognitive hardships for students, but a rich professional-development opportunity for teachers as they dealt with the challenges of online instruction. The author concluded that both teachers and students of English need to develop the digital literacy skills in order for the latter to develop the sufficient language skills needed both inside and outside classroom environments

A Naturalistic inquiry of the restructuring of a middle school: An NCLB mandate

As the 2013-2014 school year approaches, more and more schools across the United States are finding it problematic to meet the annual measurable objective of 100 percent of the school\u27s population meeting its adequate yearly progress (AYP) target, as prescribed by the federal No Child Left Behind (NCLB) legislation of 2002. Pursuant to NCLB, schools are required to meet the (defined) academic needs of all demographic populations within the school, and to ensure that all students are on grade level. The purpose of this study was to explore first-hand the perceptions, insights and strategies comprising the implementation of a major restructuring plan, and how that restructuring plan affected the school, the teachers, the students, and the school governance on the campus of a middle school in the southwest United States. The study analyzed the restructuring of the school along with the replacement of its administration and staff two years prior to the NCLB time frame requirement. A naturalistic inquiry approach was selected for this research because it allowed for an in-depth exploration of how and why a school was restructured. Data were collected during the 2008-2009 school year using a variety of data collection methods, which included observation, interviews, and document review. The participants of the study consisted of new teachers to the school, rehired teachers, not-rehired teachers, and others, which consisted primarily of non-teaching personnel and administration. Despite claims by district administration, the school was not restructured, it was reconstituted. The reconstitution was used to rid the school of mostly core subject teachers without strict regard to individual abilities or efforts towards offering academic improvement. Discipline was a major unresolved issue on campus and district communication was virtually non-existent. The district\u27s intent to restructure the school into a Professional Development School was superficial and excluded all stakeholders. And because the school was restructured two years before it was required to do so, and then the school was subsequently unable to make AYP with the then new teaching staff, the school had to plan for restructuring all over again during the 2009-2010 school year. Based on the findings of the study, the researcher strongly recommends that before restructuring is considered, it must be well planned, widely communicated, and input should be sought from all stakeholders. In addition, a complete re-evaluation of the school\u27s situation, the teachers and administrators abilities, and the climate should be conducted, thereby mitigating the creation of a negative and hostile environment

Fumigating a farm to control grain insects

During the past year, two major projects for control of grain insects were organised on Western Australian farms. Both excercises aimed to eradicate grain pests which would have seriously threatened grain exports if they had become established. The fumigation was done jointly by the Entemology branch of the Department of Agriculture, and the Agricultural Protection Board

Hope—Heartbeat of Adult Education: A Phenomenological Inquiry

This phenomenological study of the phenomenon—hope identified two essential meaning structures (“change” and “human agency”) in the experiences communicated by the Adult Educators interviewed. It was also discovered that hope is an energy that interacts with Affective, Relative (Re-lay-tive), and Cognitive energies in the lives of the research participants. Understanding how “change” and “human agency” can be aligned with these A.R.C. energies holds implications for further research and the practice of Adult Education

New header treatment aids weevil control

A new insecticide formulation supplied in high pressure cylinders simplifies weevil control in headers