Ancient eruptions of Eta Carinae: A tale written in proper motions

We analyze eight epochs of Hubble Space Telescope H$\alpha$+[N II] imaging of Eta Carinae's outer ejecta. Proper motions of nearly 800 knots reveal that the detected ejecta are divided into three apparent age groups, dating to around 1250 A.D., to around 1550 A.D., and to during or shortly before the Great Eruption of the 1840s. Ejecta from these groups reside in different locations and provide a firm constraint that Eta Car experienced multiple major eruptions prior to the 19th century. The 1250 and 1550 events did not share the same axisymmetry as the Homunculus; the 1250 event was particularly asymmetric, even one-sided. In addition, the ejecta in the S ridge, which have been associated with the Great Eruption, appear to predate the ejection of the Homunculus by several decades. We detect essentially ballistic expansion across multiple epochs. We find no evidence for large-scale deceleration of the observed knots that could power the soft X-ray shell by plowing into surrounding material, suggesting that the observed X-rays arise instead from fast, rarefied ejecta from the 1840s overtaking the older dense knots. Early deceleration and subsequent coasting cannot explain the origin of the older outer ejecta---significant episodic mass loss prior to the 19th century is required. The timescale and geometry of the past eruptions provide important constraints for any theoretical physical mechanisms driving Eta Car's behavior. Non-repeating mechanisms such as the merger of a close binary in a triple system would require additional complexities to explain the observations.Comment: 14 pages, 11 figures, accepted for publication in MNRA

Understanding the Importance and Impact of Technology in an Accounting Setting: Work Outcomes and Relationships with Clients

This study explores how technology positively or negatively impacts the accounting profession, and specifically, the impact on work outcomes (i.e. the effectiveness and efficiency of work) and relationships with clients. Three types of technology tools were featured in this study: Accounting and Analytics, Robotic Process Automation, and Communication Technology Tools and Platforms. Our research questions were (1) How much do technology tools improve the efficiency and effectiveness of the accountant? and (2) How much do technology tools affect the relationship with clients? After surveying professionals in the accounting field, we concluded that accountants believe that Communication softwares improve their efficiency and effectiveness the most, with Accounting and Analytics softwares just behind. We can also conclude that technology has a positive, or at the very least, neutral, effect on the relationship between professionals and their clients. Overall, it was found that in the accounting field, technology has a positive impact on work outcomes and relationships with clients

Teaching English Language Learners to Vet Their Sources in the Post-Truth Paradigm

According to the Institute of International Education\u27s Open Doors report, the number of international students studying in the United States exceeded one million for the first time in 2016. Many of these students have insufficient command of the English language to pass the TOEFL or IELTS examinations required for enrollment at U.S. institutions of higher education, and as a result, programs designed to teach proficiency in the English language have been developed at some of these universities. In addition to English grammar and vocabulary, some programs also seek to acculturate students to Western academic norms such as critical thinking, academic integrity, and the paper-writing process to help students be prepared culturally as well as linguistically for American university life. Source evaluation has become an increasingly fraught topic for domestic and international students alike. Within the context of a lesson plan on this topic, this chapter will discuss the development of learning outcomes; an engaging anticipatory set which connects students’ background knowledge to the topic at hand; choosing readings appropriate for the topic and students’ comprehension level; the constructivist rationale for the main activity; and the logistics (timing, technology, etc.) of planning activities for ELLs versus domestic students

Medical discourse and ideology in the Edinburgh Review: a Chaldean exemplar

No abstract available

Recognizing, Treating, and Preventing Trauma in LGBTQ Youth

Extensive research has demonstrated that lesbian, gay, bisexual, transgender, and queer/questioning (LGBTQ) youth are disproportionally affected by a variety of traumatic experiences including verbal, physical, and sexual abuse. This paper will review common traumatic experiences and their negative sequelae among LGBTQ youth including victimization directly related to youths’ gender identity and expression or sexual orientation. We will also discuss research regarding factors such as parental acceptance that may mitigate negative psychological impacts of this abuse. Guidelines for assessing and treating LGBTQ youth who have experienced trauma will be reviewed. A case example of a queer-identified youth with a history of trauma prior to and while in government care will be provided to illustrate the complexity of the impact of trauma on multiple domains of functioning and how this is exacerbated for LGBTQ youth who often face further discrimination and victimization based on their status

Rationality and Emotion in primary school leadership; an exploration of key themes

This article discusses the symbiotic relationship between emotion and rationality in leadership in primary schools. It uses the literature of both emotion and leadership to ask whether school leadership has learnt some of the lessons from the recent interest in emotion and leadership. Drawing on recent research into the lives of primary school headteachers, it asks how far our knowledge of affective leadership has informed future research, and what it means for the practice of leadership in primary schools

From Dynamic to Expressionism: An Arts Integration Study

The classroom based study “From Dynamic to Expressionism: An Arts Integration Study” was designed to answer the question; Will implementing an interdisciplinary art and music unit affect the level of student confidence in understanding expressionism in art? The researcher implemented an interdisciplinary art unit in two inner-city second grade classes. Throughout the study a survey was used for students to assess their confidence level and a checklist was used to observe student confidence during class time

Gender Differences in Non-Suicidal Self-Injury in a Sample of Treatment-Seeking Gamblers

Gambling Disorder (GD) is a public health concern with tremendous implications (Smith & Wynne, 2002). The disorder rarely occurs in isolation, often presenting with other conditions. Suicidal ideation and attempts are common among treatment-seeking gamblers (Maccallum & Blaszczynski, 2003). An important yet overlooked risk factor for suicidality is non-suicidal self-injury (NSSI; Klonsky et al., 2013). NSSI can serve many functions: relief of negative emotions; generation of positive states; escape from interpersonal obligations; attention or facilitation of resources (Nock & Prinstein, 2004). Previous research has found gender differences in NSSI. Despite NSSI’s relationship to suicidality and the noted gender differences, literature on gender differences within a gambling population is scarce. Therefore, we investigated gender differences in the form and function of NSSI in a clinical sample of 364 treatment-seeking gamblers. Overall, results suggest that females engaged in more hair pulling. Further, females endorsed often engaging in NSSI for the relief of negative emotions and for attention or facilitation of resources. Understanding gender differences in the form and functions of NSSI can provide insight into appropriate prevention, intervention, and treatment opportunities. Importantly, given the relationship of NSSI to suicide, understanding differences in NSSI may inform intervention efforts for this vulnerable population

Standardized Testing: What is it Good For? A Case Study in Connecticut

The case study was developed in an attempt to shed more light on the debate of standardized testing. The goal of the study was to find evidence to support whether or not standardized testing is worth doing in public secondary schools. To investigate this question, the state standardized math test scores of three Connecticut public high schools were analyzed. The average math scores over thirteen years were observed and statistical analysis was performed to see if any significant differences existed between the three schools. Tests were performed before and after the change in standardized test. The graduation rates of the schools were observed and compared to the trend of the CAPT mean math scores over time. This analysis was then supplemented with responses from a survey distributed to Connecticut high school math teachers to take into consideration the educators’ views of standardized testing. Both the quantitative and qualitative data had conflicting results. The standardized test scores appeared to improve over time, while the teachers found their teaching and student learning was interfered with the testing. Following the analyses, future implications of using standardized testing and how it may affect the transition to the Common Core Standards is discussed. -