The Orbital Period of the Be/Neutron Star Binary RX J0812.4-3114

We present the results of Rossi X-ray Timing Explorer observations of the Be star X-ray binary system RX J0812.4-3114. A light curve obtained with the RXTE All-Sky Monitor shows that the source is currently in an active state with outbursts occurring at approximately 80 day intervals. The source underwent a transition from an inactive state to this regular outburst state early in 1998. An observation of RX J0812.4-3114 was obtained with the RXTE Proportional Counter Array close to the time of a predicted maximum in March 1999 and strong pulsations were detected at a period of 31.88 seconds. This confirms the result of an earlier PCA observation by Reig & Roche which was serendipitously also obtained near the predicted maximum flux of the 80 day period and also near the start of the current active state. We interpret the periodicity in the ASM light curve as indicating the orbital period of RX J0812.4-3114 with outbursts occurring around periastron passage

4U2206+54 - an Unusual High Mass X-ray Binary with a 9.6 Day Orbital Period but No Strong Pulsations

Rossi X-ray Timing Explorer All-Sky Monitor observations of the X-ray source 4U2206+54, previously proposed to be a Be star system, show the X-ray flux to be modulated with a period of approximately 9.6 days. If the modulation is due to orbital variability then this would be one of the shortest orbital periods known for a Be star X-ray source. However, the X-ray luminosity is relatively modest whereas a high luminosity would be predicted if the system contains a neutron star accreting from the denser inner regions of a Be star envelope. Although a 392s pulse period was previously reported from EXOSAT observations, a reexamination of the EXOSAT light curves does not show this or any other periodicity. An analysis of archival RXTE Proportional Counter Array observations also fails to show any X-ray pulsations. We consider possible models that may explain the properties of this source including a neutron star with accretion halted at the magnetosphere and an accreting white dwarf.Comment: Accepted for publication in the Astrophysical Journa

Phase vortices from a Young's three-pinhole interferometer

An analysis is presented of the phase vortices generated in the far field, by an arbitrary arrangement of three monochromatic point sources of complex spherical waves. In contrast with the case of three interfering plane waves, in which an infinitely-extended vortex lattice is generated, the spherical sources generate a finite number of phase vortices. Analytical expressions for the vortex core locations are developed and shown to have a convenient representation in a discrete parameter space. Our analysis may be mapped onto the case of a coherently-illuminated Young's interferometer, in which the screen is punctured by three rather than two pinholes.Comment: 10 pages, 8 figures, REVTeX4, Submitted to Phys. Rev.

Teaching hospitality and tourism students’ strategies for recognizing and supporting mental health conditions and crises in industry: an exploratory study

By addressing the academic imperative for mental health education and crisis intervention, this exploratory study evaluates the desirability and availability of undergraduate education in recognizing and supporting mental health conditions and crises in hospitality and tourism industry settings. Hospitality and tourism management faculty and undergraduate students were surveyed through an online survey. The majority of faculty and students agreed mental health is important to learn in the classroom to prepare for industry, yet the majority have neither taught nor learned about mental health education and crisis intervention. The findings contribute to how educational leadership influences mental health training integration in classroom instruction. Recommendations included conducting feasibility studies with hospitality management educators on the integration of mental health in classroom learning; conducting larger, more generalizable studies on the effects of such education; and integrating effective mental health and crisis intervention training for hospitality management educators and students into curricula across the field

Evidence for a very slow X-ray pulsar in 2S0114+650 from RXTE All-Sky Monitor Observations

Rossi X-ray Timing Explorer (RXTE) All-Sky Monitor (ASM) observations of the X-ray binary 2S0114+650 show modulations at periods close to both the optically derived orbital period (11.591 days) and proposed pulse period (~ 2.7 hr). The pulse period shows frequency and intensity variability during the more than 2 years of ASM observations analyzed. The pulse properties are consistent with this arising from accretion onto a rotating neutron star and this would be the slowest such period known. The shape of the orbital light curve shows modulation over the course of the entire orbit and a comparison is made with the orbital light curve of Vela X-1. However, the expected phase of eclipse, based on an extrapolation of the optical ephemeris, does not correspond with the observed orbital minimum. The orbital period derived from the ASM light curve is also slightly longer than the optical period.Comment: To be published in the Astrophysical Journal, 1999, volume 511. 9 figure

Addiction to Work: A Critical Review of the Workaholism Construct and Recommendations for Assessment

Workaholism was first conceptualized in the early 1970s as a behavioral addiction, featuring compulsive use and interpersonal conflict. The current article briefly examines the empirical and theoretical literature over the past four decades. In relation to conceptualization and measurement, how the concept of workaholism has worsened from using dimensions based on anecdotal evidence, ad-hoc measures with weak theoretical foundation, and poor factorial validity of multidimensional conceptualizations is highlighted. Benefits of building on the addiction literature to conceptualize workaholism are presented (including the only instrument that has used core addiction criteria: the Bergen Work Addiction Scale). Problems estimating accurate prevalence estimates of work addiction are also presented. Individual and sociocultural risk factors, and the negative consequences of workaholism from the addiction perspective (e.g., depression, burnout, poor health, life dissatisfaction, family/relationship problems) are discussed. The current article summarizes how current research can be used to evaluate workaholism by psychiatric–mental health nurses in clinical practice, including primary care and mental health settings. [Journal of Psychosocial Nursing and Mental Health Services, 53 (10), 48-59.]

RXTE Observations of the Be star X-ray Transient X0726-260 (4U0728-25) - Orbital and Pulse Periods

Rossi X-ray Timing Explorer (RXTE) All Sky Monitor observations of the transient Be star X-ray source X0726-260 suggest a 34.5 day period. This is apparently confirmed by a serendipitous RXTE Proportional Counter Array (PCA) slew detection of the source on 1997 May 5, near the time of a predicted flux maximum. A subsequent 5000 second pointed observation of X0726-260 with the RXTE PCA detector was carried out on 1997 June 7, when X0726-260 was predicted to be bright again, and this revealed pulsations at a period of 103.2 seconds. If the 34.5 day period is orbital, then the pulse period is surprisingly long compared to that predicted by the correlation between orbital period and spin period observed for other Be/neutron star systems. A possible similarity with GROJ2058+42 is briefly discussed.Comment: 7 pages LateX, 7 figures. To be published in Astrophysical Journal Letter

Impact mass flow sensor for monitoring peanut harvest yields

Yield monitoring systems for harvesting machines and methods that can provide yield monitoring of crops are described. Machines include those that pneumatically convey crop through the machine such as peanut harvesting machines. The yield monitoring system includes a force sensor that can be located in conjunction with a duct of the harvesting machine such that impact of the crop materials on an impact plate within the duct will be registered by the force sensor. This registration can be used to determine a mass flow rate for the crop, which can be correlated to yield of the crop. The systems can include additional components such as optical monitors, moisture sensors, and pressure sensors

Partnerships to Address School Safety through a Student Support Lens

School safety is a primary concern of school leaders, employees, parents, and a variety of community stakeholders. Attempts to mitigate and prevent school safety concerns often focus on strategies around school climate assessment, emergency communication, school safety plan development, and school resource officer employment (U.S. DHS et al., 2018). Involvement of key stakeholders, such as school social workers, school counselors, and school-based mental health professionals is emphasized in creating and assessing school safety in a wholistic manner. This article provides an overview of a Trainings to Increase School Safety grant program that was implemented with public school stakeholders through partnerships between a university and five public school districts in the Southeastern North Carolina region