Atmospheric mass loss by stellar wind from planets around main sequence M stars

We present an analytic model for the interaction between planetary atmospheres and stellar winds from main sequence M stars, with the purpose of obtaining a quick test-model that estimates the timescale for total atmospheric mass loss due to this interaction. Planets in the habitable zone of M dwarfs may be tidally locked and may have weak magnetic fields, because of this we consider the extreme case of planets with no magnetic field. The model gives the planetary atmosphere mass loss rate as a function of the stellar wind and planetary properties (mass, atmospheric pressure and orbital distance) and an entrainment efficiency coefficient $\alpha$. We use a mixing layer model to explore two different cases: a time-independent stellar mass loss and a stellar mass loss rate that decreases with time. For both cases we consider planetary masses within the range of $1\to10$ M$_{\oplus}$ and atmospheric pressures with values of 1, 5 and 10 atm. For the time dependent case, planets without magnetic field in the habitable zone of M dwarfs with initial stellar mass losses of $\leq \dot{M}_{w} < 10^{-11}$ M$_{\odot}$ yr$^{-1}$, may retain their atmospheres for at least 1 Gyr. This case may be applied to early spectral type M dwarfs (earlier than M5). Studies have shown that late type M dwarfs (later than M5) may be active for long periods of time ($\geq 4$Gyr), and because of that our model with constant stellar mass loss rate may be more accurate. For these stars most planets may have lost their atmospheres in 1 Gyr or less because most of the late type M dwarfs are expected to be active. We emphasize that our model only considers planets without magnetic fields. Clearly we must expect a higher resistance to atmospheric erosion if we include the presence of a magnetic field.Comment: Icarus, submitted. 18 pages, 6 figure

Market power and risk taking behavior of banks

We consider a monopolistically competitive banking sector in order to analyze the effects of market concentration on the risk-taking behavior of banks. We show that, under full deposit insurance, a higher level of competition induces banks to invest in a risky asset. When the market concentration is high banks tend to take less risk. We also show that maximum social welfare is achieved either through free entry or through entry restriction.

Projects as Social Movements

Project Management (PM) is being rethought in light of the continuing prevalence of project failures. A key issue or concern believed to be important when addressing failure is the need to focus on the sociopolitical processes in PM, because of their importance to project issues or contingencies such as complexity, uncertainty, and ambiguity. Such contingencies call for supplementary PM methodologies that embrace and effectively anticipate and manage them. This paper explores the possibilities of Actor Network Theory (ANT) in developing a supplementary PM methodology. An ANT-informed methodology maps the emerging social movements that are possible from the outset, tracks changes as the project unfolds, and aims towards a useful stabilization of actors’ relations. We believe that this methodology enhances existing normative approaches by providing PM practitioners with a new lens to manage projects as social movements

INSTRUCTIONAL TECHNOLOGY IMPLEMENTATION: BARRIERS IMPACTING STUDENT SUCCESS

Purpose. The purpose of this comparative case study is to explore the benefits of effective technology integration in the classroom, as well as the best teaching practices related to instructional technology. It was designed to identify (a) educator beliefs, (b) digital divide, as well as other barriers, and (c) best practices and instructional strategies. Methodology. This qualitative comparative case study research design explored the best practices of 10 middle school teachers by using a semi-structured interview protocol. A qualitative design was selected to focus on an individual, partnership, small group, and organization. Using comparative case study allowed the researcher to gain insight from fellow educators on their implementation of instructional technology. Findings. The practices middle school teachers use as they implement instructional technology in the classroom include promoting student engagement through Google Workspace, YouTube, and providing and collecting student feedback. Educators believed implementing instructional technology allows for convenience of accessibility, frequent collaboration, district training, and the importance of a supportive administrator. Conclusion. The middle school teachers seek to provide their students with a set of technological skills that prepares them to be successful in their future. The teachers’ determination to make the content engaging and relatable with instructional technology demonstrates their dedication to student academic achievement. Recommendations. School district facilitators should assess the current trainings they provide their incoming and resident teachers regarding implementation of instructional technology. One focus should be on supporting teachers with a training on how to implement instructional technology and various platforms to establish effective communication with students by providing real-time feedback. Future research could focus on determining if student academic achievement is a result of their technological skill set. To add to the research, observation of participants’ implementation of instructional technology would provide a greater understanding of its benefits and capabilities

Achieving recovery for patients in hospital rehabilitation units through education

Millions of people are admitted to hospitals every day with the hope of alleviating, if not eliminating, their health conditions. Rehabilitation units within hospitals also admit patients every day for various medical conditions that result in decreased functioning. Unfortunately, many patients are not leaving hospital rooms healthier nor are they leaving with the confidence that they can follow through with their treatment instructions. Most importantly, patients lack health literacy skills that can help them navigate the healthcare system and understand their care, causing a limited recovery. As an intern at the Sam Karas Acute Rehabilitation Unit (ARU), I developed an educational intervention aimed at increasing Medicare patients’ knowledge about their insurance and available community resources in order to improve their rehabilitation. Materials presented included videos, pamphlets, and fact sheets all containing brief and useful information about Medicare coverage. Pre- and post-tests were used to measure patient knowledge and results showed a significant increase in health literacy

The effect of writer\u27s workshop on the development of students\u27 writing abilities at Central Institute for the Deaf

This paper presents the implementation of a writer\u27s workshop at Central Institute for the Deaf, as a method of developing the writing skills of hearing impaired children

The effect of writer\u27s workshop on the development of students\u27 writing abilities at Central Institute for the Deaf

This paper presents the implementation of a writer\u27s workshop at Central Institute for the Deaf, as a method of developing the writing skills of hearing impaired children

No place for silence- freedom of expression in Mexico

This article is by Marcela Zendejas (@marcezendejas) and Darío Ramírez (@Dariormrs) – Article19 Mexico In Mexico, under the current president Enrique Peña Nieto, a journalist is attacked on average every 26 hours. This figure is double that of 48 hours under the former president Felipe Calderon. In the first two years of his administration, Peña Nieto was able to manipulate the official discourse to present a positive picture of Mexico on the international stage but a deepening human rights crisis has made it more difficult for the government to maintain its cynical grin

DSM-IV-TR/DSM-5, An Evidence-Based Comparative Analysis with Focus on the Cultural Context of Mental Health Illness of: Bipolar Disorders, Depression, Autism Disorders, Anxiety and ADHD.

The DSM-5 presents many changes in the criteria and categories used in the clinical diagnosis of clients. In addition, the proposed changes within the DSM-5 also attempts to address some of the concerns regarding the lack of a contextual assessment process regarding the role of culture within the lives of clients (Warren, 2013). This research aims to create a comparison between the DSM-IV-TR and the DSM-5 of some of the most common diagnosis used by Family Service Rochester including: bipolar disorder, depression, autism disorder, anxiety and ADHD. In addition, this project also intends to develop a comprehensive cultural analysis of the already mentioned disorders to enlighten future culturally appropriate interventions for individuals who face mental health challenges