Quasinormal modes of Charged Regular Black Hole

The quasinormal modes (QNMs) of a regular black hole with charge are calculated in the eikonal approximation. In the eikonal limit the QNMs of black hole are determined by the parameters of the unstable circular null geodesics. The behaviors of QNMs are compared with QNMs of Reisner-Nordstr\"{o}m black hole, it is done by fixing some of the parameters that characterize the black holes and varying another. We observed that the parameter that is related one effective cosmological constant at small distances , determines the behaviors of the QNMs of regular black hole with charge.Comment: arXiv admin note: text overlap with arXiv:1607.0247

A Grounded Theory Study of Senior Leader Experiences and Perceptions of Unplanned Turnover

This study focused on the persistent problem facing organizational leaders of voluntary turnover of professional staffs. The problem of turnover in general has been studied for decades from the perspective of those who left the organization. What is lacking in the body of research is an understanding, from the perspective of senior management, of why professionals abruptly leave the organization (Waldman, Carter, & Hom, 2015). The purpose of this exploratory qualitative research is to examine the phenomenon of sometimes abrupt, voluntary turnover of professionals in organizations from the perspective of organizational leaders. A more contemporary, less objective evolution of traditional grounded theory, constructivist grounded theory, was utilized which still retains the emergent, iterative process of traditional grounded theory but instead allows for and promotes the inclusion of the researcher’s point of view (Charmaz, 2014). Interview and transcription data were analyzed using open coding, focused coding, memoing, constant comparative analysis, and theoretical sampling. The proposed grounded theory that emerged from the responses of leader participants is described as a repeating cycle of leader experiences associated with the unplanned loss of a valuable employee. This cycle of leader experience (sequence) is composed of major phases of Trust, Shock, and Regret. Simultaneous to the Trust-Shock-Regret cycle are situational conditions related to the unplanned loss: high leader communication, ‘warning signs’, and management disconnect. This study adds a new dimension to our understanding about the role of leaders in unplanned turnover, from the context of experienced, senior-level organizational leaders of professional employees. This study focused on the persistent problem facing organizational leaders of voluntary turnover of professional staffs. The problem of turnover in general has been studied for decades from the perspective of those who left the organization. What is lacking in the body of research is an understanding, from the perspective of senior management, of why professionals abruptly leave the organization (Waldman, Carter, & Hom, 2015). The purpose of this exploratory qualitative research is to examine the phenomenon of sometimes abrupt, voluntary turnover of professionals in organizations from the perspective of organizational leaders. A more contemporary, less objective evolution of traditional grounded theory, constructivist grounded theory, was utilized which still retains the emergent, iterative process of traditional grounded theory but instead allows for and promotes the inclusion of the researcher’s point of view (Charmaz, 2014). Interview and transcription data were analyzed using open coding, focused coding, memoing, constant comparative analysis, and theoretical sampling. The proposed grounded theory that emerged from the responses of leader participants is described as a repeating cycle of leader experiences associated with the unplanned loss of a valuable employee. This cycle of leader experience (sequence) is composed of major phases of Trust, Shock, and Regret. Simultaneous to the Trust-Shock-Regret cycle are situational conditions related to the unplanned loss: high leader communication, ‘warning signs’, and management disconnect. This study adds a new dimension to our understanding about the role of leaders in unplanned turnover, from the context of experienced, senior-level organizational leaders of professional employees

Effect of Postprandial Walking on the Glycemic Effect of a Meal: Type I Diabetes

This study was conducted to determine if 15 minutes of postprandial light walking has an effect on the glycemic response to a Boost® beverage in individuals with type 1 diabetes. Seven participants, 22.3 + 4.3 yrs, with type 1 diabetes completed the two days of data collection. On day 1, participants measured baseline fasting blood glucose (BG) with a glucometer, consumed a Boost® beverage, and sat quietly, repeating BG measurements 15, 30, 60, 90, and 120 minute. On day 2, participants repeated the protocol, but walked 15 minutes at a light pace (50-60% max HR) immediately after beverage consumption. The difference between peak and baseline BG was significantly lower on the walking day compared to the sedentary day (6.4 + 1.2 vs 4.0 + 2.4, respectively, P \u3c .05) as was the iAUC (468.6 + 94.5 mmol/L/120min vs 241.1 + 155.8 mmol/L/120min, P \u3c .05). In conclusion, light walking for 15 minutes postprandially can blunt the spike in BG and overall glycemic response to a breakfast beverage in young adults with type 1 diabetes

Is DEET safe for children?

Reported evidence suggests that DEET use is safe for children older than 2 months, with only very rare incidence of major adverse effects (strength of recommendation [SOR]: C). Typically, a topical concentration between 10% and 30% should be used (SOR: C). Increasing DEET concentration does not improve protection, but does increase the duration of action (SOR: A)

Linking nitrogen cycling transformations to microbial diversity in freshwater ecosystems

This is an editorial for a special issu

Preparing for an interdisciplinary future: A perspective from early-career researchers

Increasingly, research is moving towards more interdisciplinary endeavours. Effective collaboration between people from different disciplines is necessary to maximise the potential benefits of interdisciplinarity for future research activity. This paper analyses an approach to fostering the skills required for successful cross-disciplinary collaboration from the perspective of an interdisciplinary group of early-career researchers. Our reflection on how specially-designed encounters can help to shape future interdisciplinary research initiatives draws on the discussion of a four-day workshop, a post-event survey, and a review of other experiences. We conclude that interdisciplinary encounters are an effective means to support the development of future interdisciplinary researchers, with a major advantage of this approach being the opportunity for open communication. Depending on the organiser's aim, we distinguish between “cultivation” and “development” encounters. Among the multiple factors that produce successful interdisciplinary encounters, we found that selection of a theme, participants and location need to be tailored to the encounter's particular objectives. We recommend that funding bodies and other members of the research community should take note of the effectiveness of encounters to foster interdisciplinarity and generate space to develop more innovative and high-impact research that delivers solutions to the challenges facing humanity in the future

Beliefs and Attitude Changes Towards Virtual Reality Usefulness After Disabilities Simulation

ABSTRACT Virtual Reality (VR) has been utilized often as a potential recreational tool for enjoyment by generating false realities to interact with, but in regards to a potential tool to introduce understanding in cultures and empathetic responses it has seen little use. Stereotypical beliefs seem to exist that disabled people are unable to care for themselves (Burgstahler & Doe, 2004). Furthermore, individuals without disabilities may not fully understand how a person with disabilities is able to even function in daily life (McKenny, 2018). Leo and Goodwin (2016) emphasized the value of simulation exercises to change individual attitudes and perspectives towards those who live with disabilities. PURPOSE: The purpose of the study was to assess people’s attitudes and belief changes towards the use of VR after participating in disability simulations. METHODS: Implemented in a class about motor movement in special populations, subjects were college students(n=44) who were administered a Likert scale pre-survey. The survey emphasized subject’s beliefs around the use of VR for gaming, education, work preparation, therapy, use for individuals with disabilities, and those developing empathy towards individuals with disabilities. Subjects then participated in a VR training session, an autism emotional disturbance simulation, and a simulation of what a blind person’s imagination goes through while handling sounds and touch sensations around them. A Wilcoxon Signed Rank Test was used in SPSS software to analyze the nonparametric data for two nominal variables comparing pre and post beliefs and attitudes. RESULTS: Overall, most questions posed to the subjects were not found to be statistically significant with the error rate used throughout the entirety of the study (α = 0.05). However, when asked about the ability for VR simulations to create or increase empathy in the subjects towards those with disabilities there was a statistical significance (Z = -2.02, p = 0.042.) Additionally, positive trends were found in the aggregated mean scores when comparing the pre and post surveys with subjects across all variables in the survey. CONCLUSION: While more categories were expected to have a significant change, only empathy showed statistical significant. This result encourages the ability of VR simulations to assist in understanding and sharing comprehension with another individual who has disabilities or in a restricted perceptual motor/behavioral state. Further research on the topic may also reveal that the positive trends found in this study may have statistical significance if used in larger sample sizes

Hydrologic change in New Zealand during the last deglaciation linked to reorganization of the Southern Hemisphere westerly winds

Millennial‐scale climate anomalies punctuating the last deglaciation were expressed differently in the Northern and Southern Hemispheres. While changes in oceanic meridional overturning circulation have been invoked to explain these disparities, the nearly synchronous onset of such events requires atmospheric mediation. Yet the extent and structure of atmospheric reorganization on millennial timescales remains unclear. In particular, the role of the Southern Hemisphere westerly winds (SHWW) and associated storm tracks is poorly constrained, largely due to the paucity of accessible archives of wind behavior. Here we present a new paleohydrologic record from a Lake Hayes, New Zealand (45° S) sediment core from ~17‐9 ka. Using two independent proxies for lake hydrology (Ca/Ti in sediments and δD values of aquatic plant biomarkers), we find evidence for a wetter Antarctic Cold Reversal (ACR, 14.7‐13.0 ka) and a drying trend during the Younger Dryas (YD, 12.9‐11.6 ka) and early Holocene (11.7 ka onward in this record). Comparisons of the Lake Hayes record with other Southern Hemisphere sites indicate coherent atmospheric shifts during the ACR and YD, whereby the former is wetter/cooler and the latter is drier/warmer. The wet/cool phase is associated with a northward shift and/or strengthening of the SHWW, whereas the drier/warmer phase indicates weaker mid‐latitude winds. These climatic trends are opposite to the Northern Hemisphere. There is a decoupling of climatic trends between Southern Hemisphere low‐ and mid‐latitude climates in the early Holocene, which could be explained by several mechanisms, such as the retreat of Antarctic sea ice

Assessing Psychosocial Work Environments of Coaches in Spain and Their Relationships With Mental Health, Behavioral Stress Symptoms, and Burnout

The purpose of this study was to assess the psychosocial work environments (PWE) among a sample of coaches in comparison to the reference values of the Spanish general workforce, as well as to explore the relationship between PWE and mental health, behavioral stress symptoms, and burnout. A representative sample (n=1481) of Spanish coaches (18.1% women, Mage=32.98, SD=11.60) completed a battery of questionnaires. Results showed that, in comparison to the general workforce, coaches showed statistically significant differences in most of the PWE areas assessed. The emotional demands experienced by coaches are a risk for health, while trust regarding management and recognition are positive features in their PWE. Coaches’ emotional demands were associated with low mental health scores and higher levels of behavioral stress symptoms and burnout, whereas social community at work and role clarity were protective factors for health. Practical implications to provide more favorable work environments for coaches are discussed