The dynamics of phase farming: A mathematical model of economic aspects of switching between cropping and land rehabilitation

In this thesis we consider the following problem: Suppose that a farmer wishes to determine the best course of action to maximise returns from his I her land which has undergone some form of degradation. In order to rehabilitate the land, the farmer may have to change to a different farming practice for some time until the previous practice becomes profitable again. Switching from cropping to rehabilitation Of from rehabilitation to cropping incurs costs. From an economical point of view, the question then arises: When is the optimal time to switch from cropping· to rehabilitation and when is it optimal to switch back to cropping again in order to maximise profit? In tills thesis, we give a mathematical formulation of the farmer\u27s problem and derive necessary conditions for optimality using the calculus of variations. We then apply our model to the specific case of a rotation between wheat farming and oil mallee plantation. We determine optimal switching times for two scenarios - break even and current performance levels- and explore the effects of the rates of change of the water level and the discount rate on the optimal switching times

The dynamics of phase farming in dryland salinity abatement

Farm Management, Land Economics/Use,

Research choice: Pragmatism in conducting research about university enterprise collaboration in the Vietnamese context

  This article discusses the choice of methodology I had when conducting research on the university-enterprise collaboration (UEC) in the Vietnamese context. As I am more interested in how best to address the research problems rather than in the politics of methodology, the discussion in this paper will not focus on the differences between the two dominant approaches to educational research (qualitative and quantitative). Rather, this paper will discuss my way to approach the problems in order to find the best possible answers for the research questions. In this study, pragmatic approach was employed to develop a rich, contextualized understanding of underlying values, beliefs and assumptions that guide actions. This was done by a two phases research study: quantitative surveys focusing primarily on revealing current UEC situation, its obstacles and solutions were used first, then the qualitative interviews were followed to explore in depth why those obstacles existed and how feasible the solutions were - this was also the goal of this study. The focus on the second phase – to discuss the most meaningful and revealing issues related to the local issued of UEC, ultimately, helped me produce more meaningful study outcomes. Keywords: qualitative; mixed methods; pragmatism; constructivism; university-enterprise collaboration; Vietnam

Enhancing graduate employability and the need for university-enterprise collaboration

Over the last few decades there has been strong debate over the central mission of higher education and resistance to the employability agenda seemed strong. However, with the changing context of both higher education and the labour market, together with neoliberal pressure, enhancing graduate employability has become one of the central focuses in many universities worldwide.This article provides an overview of the relevant literature to resonate with why graduate employability has been more popularly presented in many university practices. The notion of graduate employability is examined and it is argued that without input from and collaboration with industry, universities are hardly able to achieve their vocational mission of equipping their students for the labour market

1p spaces

In this paper we will study the 1p spaces. We will begin with definitions and different examples of 1p spaces. In particular, we will prove Holder\u27s and Minkowski\u27s inequalities for 1p sequence

Academic Impacts of Later School Start Times

Literature Review Research in progress for PSYC 2301: Honors General Psychology Faculty Mentor: Jennifer L. O’Loughlin-Brooks The following paper represents research produced by students in an Honors General Psychology course. The class assignment introduces students to scientific research and writing through a team-based approach. Each individual student team, composed of two or three members, conducts a comprehensive literature review on a specific psychology topic of their choosing. They summarize and evaluate at least seven pieces of scholarly work, discuss future areas of investigation for the field, and explain how this research might add qualitatively to the existing knowledge of the discipline. In addition, student teams interview at least one expert in their research area and include that interview as a primary source of information. Nicole Swain, Tuyet Tran, and Daphne Carrier researched sleep in teens and posited that many adolescents lack the necessary amount of sleep for their physical health and cognitive functioning (Dunietz et al., 2017). The students proposed that a significant contributing factor to lack of sleep among adolescents is early start times for middle and high school, with later school start times correlating with reduced health problems, behavioral issues, and motor vehicle accidents among adolescents (Morgenthaler et al., 2016). Schools with later start times also frequently observe improvements in attendance, grades, and standardized test scores (Marx et al., 2017). To better understand the relationship between school start times and academic achievement, the review incorporates personal interviews with sleep research experts

The Factors Affecting Entrepreneurial Intention With Self Confidence as a Moderator - Based on Elderly People as an Example

Purpose: This study aims to determine the factors affecting the entrepreneurial intention of young people in Vietnam, thereby assessing the level of these influencing factors to propose solutions and entrepreneurship orientations effectively in the future.   Theoretical framework:  After synthesizing previous studies, the study has found some studies that mention the impact on the entrepreneurial intention of students and young people while finding a research gap that has not been studied on this issue among elderly people. Therefore, the authors proposed a research model with factors as follows: Family support, government policy, self-confidence, and capital, which affect entrepreneurial intention.   Design/methodology/approach: This study uses SPSS software to test the hypothesis by linear regression method and to test the research hypothesis with survey samples conducted in 5 months 1310 votes were collected, including 972 valid votes. The age of survey participants is between 45 and 65 years old..   Findings:  The results show that the capital factor does not affect the entrepreneurial intention while the entrepreneurial experience factor has the strongest impact on the start-up intention. Next, it is support from the government and support from family. Finally, it is self-confidence. That proves that capital is not an essential issue for elderly people because they have already accumulated capital before. Whereas, the experience factor refers to a long process of working. The longer they work, the more experienced they get, thereby increasing their ability to be confident and successful in doing business in their old age.   Research, Practical & Social implications:  The proposal of this study will be an important reference for start-ups and related government agencies. It aims to promote breakthrough business ideas and exploit the essence of experienced people who have retired. This object needs special attention to develop the country's economy sustainably.   Originality/value:  Identified a research gap from previous studies there are no studies into the object of elderly people. The research results have been through a methodical and professional data acquisition process in two forms, such as quantitative and qualitative methods, thereby proposing research models. The research results are to find out the difference with the previous topics. Also, it is proposed to be an important reference for agencies and organizations related to start-up activities in Vietnam

THE INFLUENCES OF THE FLIPGRID APP ON VIETNAMESE EFL HIGH SCHOOL LEARNERS’ SPEAKING ANXIETY

Research on the use of Flipgrid in the language classrooms has focused on its effects of online video-mediated communication tools, learners’ attitudes, and perceptions; nonetheless, not much research has recently been conducted about the influences of the Flipgrid app on EFL learners’ speaking anxiety. Therefore, this research aimed at investigating whether Flipgrid helps the EFL high school learners reduce their anxiety in learning English speaking and determine the learners’ attitudes towards its usages. The research followed a combination of a quasi-experimental method and a mixed-method with the participation of 60 EFL tenth-grade learners in a high school in the Mekong Delta. Three research instruments namely the modified Foreign Language Classroom Anxiety Scale (FLCAS), the questionnaire, and the interviews were employed in this study. The findings showed that there was a decrease in EFL high school learners’ level of anxiety in learning English speaking after experiencing Flipgrid. Moreover, the majority of the learners also showed their positive attitudes towards the use of Flipgrid in learning English speaking and expected that Flipgrid should be employed frequently to make learning English speaking become more motivating.  Article visualizations

White spot syndrome virus molecular epidemiology: relation with shrimp farming and disease outbreaks

White spot syndrome virus (WSSV), the causative agent of white spot disease (WSD), has been responsible for most shrimp production losses around the world since the early 1990s. Previous research has focused mainly on the characterization of WSSV genomic variation to gain a better insight in the evolution and spread of the virus at the regional and global levels.Although WSSV genetic variation at small spatial scales has been described, the question is whether there is a correlation between this genomic variation and shrimp farming practices and disease outbreak at the local and farm level. Therefore, the present research has been carried out to describe in detail WSSV genetic variation over space and time and to estimate transmission routesof WSSV genotypes in ponds with different farming regimens. Different molecular markers, natural variation contained within the WSSV genome, were tested to quantify these relationships in semi-intensive, extensive and rice-shrimp farming systems within the Ca Mau and Bac Lieu provinces, both in the Mekong Delta, Vietnam. The outcomes of the research showed that (i) there are differences in genetic structure of WSSV populations in shrimp culture areas, with more variation found in variable number tandem repeat (VNTR) regions, short adjoining repeat sequences, than in genomic regions in which large deletions occur; (ii) a correlation betweenWSSV population structure, disease outbreak status and pond farming system was observed, providing evidence that the WSSV VNTR structure (in particular the number of repeat units in ORF94) statistically correlate with disease outbreaks and to a lesser extent to farming system; (iii) mixed-genotype WSSV infections of shrimp are correlated with fewer disease outbreaks in ponds; and (iv) it might be possible to use molecular markers (ORF94 and ORF125) to predict the outcome of WSSV infections in shrimp ponds in the future. For field applications, these findings provide important information for the development of specific management strategies to control WSD.</p