Virtual social network-mediated English language learning in a Saudi tertiary EFL context : innovation and agency : a thesis presented in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Applied Linguistics at Massey University, Palmerston North, New Zealand

The study explores the nature and roles of virtual social network (VSN) within a Saudi tertiary EFL (English as a foreign language) context, and the trajectory of the students’ experiences and perceptions of Twitter inside the classroom and of WhatsApp outside the classroom throughout a 12-week semester. The study draws on the three broad phases of Fullan’s change process (Fullan, 2001, 2007, 2016) for its underpinning theoretical framework and utilizes agency theory (van Lier, 2004, 2008, 2010) as an analytical tool for developing a deep understanding of the ways the innovative use of a VSN can aid students in and outside the classroom by allowing them to practice and collaborate in English learning. The study utilizes a mixed methods approach for data collection, divided into two stages; one designed to gather background information and another for a longitudinal study. The data collection instruments employed for the background stage included a questionnaire, interviews, and classroom scenarios, to gather data from 93 English language teacher trainees and 84 Preparatory Year Program (PYP) students from three different colleges at Qassim University (QU) in Saudi Arabia. The data collection instruments for the longitudinal study stage, which consisted of initial and post-project interviews, focus group participation, research log observations in and outside the classroom, and a post-project questionnaire, were employed to gather data from 25 PYP students throughout the 12-week semester. The study results revealed that VSN in the Saudi EFL context is divided into two types, private- and public-based, and that participants’ use and activity in each type varies depending on the platform affordances. It also suggests that, while students may have a positive attitude toward the use of a VSN in their daily lives, contextual constraints could mean that classroom use may fail to be sustained over a relatively long period of time. Within the study, although Twitter’s affordances in terms of anonymity and perceived newness initially motivated the students to exercise their agency in English learning, their anxiety, the teacher’s role, and the university infrastructure all played a crucial role in the failure of Twitter’s use to be sustained inside the classroom beyond the ninth week. However, WhatsApp’s implementation exhibited its sustainability by continuing even after the study ended and until the end of the semester. WhatsApp allowed the students to collaborate, practice what they were learning, develop autonomy, and transit from being passive to active learners, not only in English but also in other subjects. Finally, this thesis concludes by illustrating the value of interpreting the complex and dynamic nature of the innovation’s implementation process using agency theory from an ecological perspective. It also recommends ways in which teachers could implement VSN in the language classroom

Selfconsistent hybridization expansions for static properties of the Anderson impurity model

By means of a projector-operator formalism we derive an approximation based on a self consistent hybridization expansion to study the ground state properties of the Anderson Impurity model. We applied the approximation to the general case of finite Coulomb repulsion $U$, extending previous work with the same formalism in the infinite-$U$ case. The treatment provides a very accurate calculation of the ground state energy and their related zero temperature properties in the case in which $U$ is large enough, but still finite, as compared with the rest of energy scales involved in the model. The results for the valence of the impurity are compared with exact results that we obtain from equations derived using the Bethe ansatz and with a perturbative approach. The magnetization and magnetic susceptibility is also compared with Bethe ansatz results. In order to do this comparison, we also show how to regularize the Bethe ansatz integral equations necessary to calculate the impurity valence, for arbitrary values of the parameters.Comment: 8 pages, 5 figure

WORKPLACE BULLYING IN KUWAIT

Workplace bullying (WPB) is a pervasive problem in contemporary society, inflicting detrimental repercussions upon employees, employers, and organizations alike. It affects the physical, psychological, and financial wellbeing not only of its victims, but also their families, their communities, and society as a whole. Research into this phenomenon has evolved significantly over the past two decades. While related to the physically violent phenomenon of schoolyard bullying, WPB is primarily a psychological phenomenon, manifesting as abusive power in workplace relationships, rather than as interpersonal conflict. Bullying at work comes in many forms, has many faces, and occurs in many places. It ranges from subtle to overt acts, with subtle forms occurring more regularly. The rubric of bullying can include: harassment, mobbing, scapegoating, social exclusion, repudiation, humiliation, and/or workplace mistreatment or abuse. Corresponding to a lack of attention on bullying among adults, WPB seems to occur everywhere—from businesses and factories to colleges and hospitals. To address this phenomenon, this study a) explored the prevalence of WPB in Kuwait and its association with employee demographics, b) evaluated the sample’s views regarding professional social workers in the workplace, and c) explored the relationship between these variables and absenteeism. This non-experimental, quantitative study employed a cross-sectional survey with correlational analyses and prediction research designs. Using the snowball sampling method via social media platforms, the researcher distributed the Negative Acts Questionnaire-Revised (NAQ-R) survey and a demographic questionnaire to an anonymous, non-randomized sample of employees. The target sample included any adult, volunteer participant who was working in Kuwait for at least six months before receiving the survey. From a total of 8,531 recorded surveys, 3,725 surveys with missing data and 119 surveys that did not meet the inclusion criteria were excluded, leaving 4,687 (53.9%) complete surveys used for the analysis. The majority of participants were males ranging between 30-39 years old. The vast majority were Kuwaiti, married, bachelor degree graduates, employed in lower-level positions within the governmental sector, earning 800-1,399 KD monthly income. Seventy percent of targets were dissatisfied with management, compared to 50% of the general participants. Similarly, 50% of targets were dissatisfied with their daily supervisors, compared to 35% of the general participants. Around two-thirds of both targets and general participants agreed with the importance of having a social worker or psychologist at the workplace to address WPB. The vast majority of targets were bullied by their immediate superiors (50%) or other superiors (45%). Based on a criterion of a minimum of three negative acts monthly, the results of this study indicated a 39% prevalence rate of WPB in Kuwait. This percentage corresponded with the percentage of the targets who labeled themselves as victims. Regarding demographics, a large majority of targets reported being bullied by someone of the opposite gender. Among female targets, 92.7% were bullied by male perpetrators, and among male targets, 82.8% were bullied by female perpetrators. Females were more often reported as perpetrators, and males more often as targets. Non-Kuwaiti employees, the young, the divorced, those working in low-level positions, and those earning low income had the highest rate of exposure to WPB. Regarding prediction, those more likely to experience WPB included: females, the young, non-Kuwaiti employees, and workers in middle-level positions with low education or low income, who were dissatisfied with management, their daily supervisors, or their own jobs, and those who expressed a need for a counselor in the workplace. In terms of predicting WPB-related absenteeism, males, the divorced, and those working in lower-level positions with low income, low education, dissatisfaction with their job, or dissatisfaction with their daily supervisors were more likely to report high absenteeism. The high rate of WPB has implications in the workplace, calling for concerted efforts to identify the elements that trigger and escalate WPB. This study was the first of its kind to measure such elements of WPB in Kuwait. By using the NAQ-R scale, the demographic questionnaire, and a modified operational definition of WPB, this study has provided a template for needed research in the Arabian Gulf region

Modeling power grids

We present a method to construct random model power grids that closely match statistical properties of a real power grid. The model grids are more difficult to partition than a real grid.Comment: 9 pages, 5 figure

Effects of semiclassical spiral fluctuations on hole dynamics

We investigate the dynamics of a single hole coupled to the spiral fluctuations related to the magnetic ground states of the antiferromagnetic J_1-J_2-J_3 Heisenberg model on a square lattice. Using exact diagonalization on finite size clusters and the self consistent Born approximation in the thermodynamic limit we find, as a general feature, a strong reduction of the quasiparticle weight along the spiral phases of the magnetic phase diagram. For an important region of the Brillouin Zone the hole spectral functions are completely incoherent, whereas at low energies the spectral weight is redistributed on several irregular peaks. We find a characteristic value of the spiral pitch, Q=(0.7,0.7)\pi, for which the available phase space for hole scattering is maximum. We argue that this behavior is due to the non trivial interference of the magnon assisted and the free hopping mechanism for hole motion, characteristic of a hole coupled to semiclassical spiral fluctuations.Comment: 6 pages, 5 figure