Racialized Sexual Discrimination (RSD) in the Age of Online Sexual Networking: Are Young Black Gay/Bisexual Men (YBGBM) at Elevated Risk for Adverse Psychological Health?

Young Black gay/bisexual men (YBGBM) are a highly marginalized population across multiple health outcomes. Most research on YBGBM health has focused on HIV/sexual health, but there is a demonstrable need for research examining racism and psychosocial functioning among this population. Racialized Sexual Discrimination (RSD), also known as sexual racism, is an important but under‐investigated phenomenon that may have implications for the psychological health and well‐being of YBGBM. This paper provides an overview of empirical research on RSD as experienced by gay/bisexual men of color in online partner‐seeking venues. First, the researchers discuss how racialized experiences are a documented online phenomenon, with a variety of manifestations, and identify the potential effects that this phenomenon may have on the psychosocial health of YBGBM, and gay/bisexual men of color as a whole. Second, the researchers synthesize the RSD literature with a broader literature examining psychological well‐being across race and sexual orientation. Third, the researchers present a theoretically grounded conceptual model detailing the pathways between RSD and psychological well‐being using a stress and coping framework. The paper concludes with recommendations for future research on this topic, including scale development and hypothesis testing.HighlightsRacialized Sexual Discrimination (RSD) is a multidimensional yet understudied construct.RSD, also known as sexual racism, is widely perpetuated in online hook‐up websites for gay men.RSD may negatively impact the psychological health of gay/bisexual men of color.There is an imperative to develop robust measurement tools to capture the full extent of RSD.A conceptual and analytic model to guide scientific inquiry into RSD is proposed.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/155883/1/ajcp12401.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/155883/2/ajcp12401_am.pd

An Economic Analysis of Texas Shrimp Season Closures

Management of the Texas penaeid shrimp fishery is aimed at increasing revenue from brown shrimp, Penaeus aztecus, landings and decreasing the level of discards. Since 1960 Texas has closed its territorial sea for 45-60 days during peak migration of brown shrimp to the Gulf of Mexico. In 1981 the closure was extended to 200 miles to include the U.S. Exclusive Economic Zone. Simulation modeling is used in this paper to estimate the changes in landings, revenue, costs, and economic rent attributable to the Texas closure. Four additional analyses were conducted to estimate the effects of closing the Gulf 1- to 4-fathom zone for 45 and 60 days, with and without effort redirected to inshore waters. Distributional impacts are analyzed in terms of costs, revenues, and rents, by vessel class, shrimp species, vessel owner, and crew

Challenges of 3D Printing for Home Users

3D printing is described as the next industrial revolution bringing manufacturing to the home. However, it’s attraction to the home or non-technical user is frustrated by the difficulty in deploying the software and the technology which both need professional understanding and training. Research and innovation in this area has concentrated on technology, not users and usability. Home users can access simple design software tools, best described as good for one task only. Software such as Microsoft word and Excel have been the subject of development for enabling most people to use computers without the need for training or the ability to program. However research in the home users of 3-D printing is very limited. This literature review is concerned is an investigation into home/non-technical use of 3-D printers, their needs and limitations, in order to facilitate the development of effective tools and manuals. An investigation of literature and a survey supported by a focus group of 42 university students aims to understand the way home/non-technical users currently use designs, and how they can to adapt/change their designs for effective use of 3-D printing. This will identify the tools/’apps’ needed for accessible understanding and deployment of the technology

The Effects of Three Physical Education Activites on Selected Physical Fitness Components

This study was designed to investigate the relative effects of selected physical education activities upon four components of physical well-being of college men. This study was intended to determine if changes occur in endurance, flexibility, balance, and agility by groups participating in either apparatus gymnastics, wrestling or swimming

New Teachers' Perception of the Pre-Service Agricultural Education Program at Oklahoma State University

Agricultural Educatio

Nutrient Availability Patterns of Various Phosphatic Sources in Pine Bark: Sand Media and Their Effect on Several Species of Container-Grown Woody Ornamentals and Phosphorus-32 Tracing of Uptake of Phosphorus From Ordinary Superphosphate (0-20-0) by Gardenia Jasminoides \u27Radicans\u27 (Fertility).

Solution-phase pH, soluble salts, NH(,4)-N+NO(,3)-N, P and K were compared over a 140-day period in 1982 for five phosphatic sources (0-18-0, 0-46-0, 29-26-0, 18-48-0, 11-55-0) incoporated at three rates in a pine bark-sand medium (4:1 v/v). Treatment effects on visual quality of five ornamental species, media-bound and leaf-tissue nutrient levels (gardenia species) and shoot dry weights (gardenia species) were also investigated. Compared to the check, media amended with each of the P sources were generally lower in pH. Solution-phase nitrogen (NH(,4)-N+NO(,3)-N) levels for the 0-18-0 or 0-46-0 sources were significantly lower than that of the other P sources and the check on day 7. Solution-phase P, media P and leaf-tissue P levels from the five P sources were significantly higher than the check when averaged over sampling days. The 0-18-0 source provided significantly higher media Ca levels and significantly lower media Mg, Na, Zn and Mn levels than the other P sources and check. Leaf-tissue P, K, Cu and Mn levels were significantly and positively correlated with their respective levels in the media. The 1.28 kg/m(\u273) rate of the 0-18-0 and 0-46-0 sources resulted in significantly lower solution-phase and media pH, significantly higher media P and significantly lower media Mg than the 0.42 kg/m(\u273) rate. Visual quality ratings of four of the five species grown in media amended with the P sources were superior to that of the check. Higher visual ratings resulted from the 29-26-0 and 18-48-0 sources. The uptake of phosphorus from (\u2732)P-labeled ordinary superphosphate 0-20-0 by liners and cuttings of Gardenia jasminoides \u27Radicans\u27 was monitored over a six-week period in 1983. Phosphorus from 0-20-0 was evident within liners and cuttings by day 4, and its level increased throughout the study. Phosphorus uptake from 0-20-0 increased as application rate of 0-20-0 increased. Upwar mobility of (\u2732)P within cuttings was not apparent until root initiation had begun. Visual quality ratings of three woody-ornamental species were determined over a 126-day period in 1983 when 0-20-0 and Osmocote 40-0-0 were factorially combined at three rates and incorporated into a pine bark-sand medium and when 0-20-0 and Osmocote 17-7-12 were applied according to two fertilization methods; dibbled and incorporated. Quality of each species at a 1.8 kg/m(\u273) rate of Osmocote 40-0-0 were superior to those at a 0.9 kg/m(\u273) rate. The dibbled application of Osmocote 17-7-12 resulted in superior visual ratings for two of the three species. Ordinary superphosphate 0-20-0 had no significant effect on quality of the species studied regardless of application rate or fertilization method

FTIR Difference Spectroscopy in Combination with Isotope Labeling for Identification of the Carbonyl Modes of P700 and P700+ in Photosystem I

AbstractRoom temperature, light induced (P700+-P700) Fourier transform infrared (FTIR) difference spectra have been obtained using photosystem I (PS I) particles from Synechocystis sp. PCC 6803 that are unlabeled, uniformly 2H labeled, and uniformly 15N labeled. Spectra were also obtained for PS I particles that had been extensively washed and incubated in D2O. Previously, we have found that extensive washing and incubation of PS I samples in D2O does not alter the (P700+-P700) FTIR difference spectrum, even with ∼50% proton exchange. This indicates that the P700 binding site is inaccessible to solvent water. Upon uniform 2H labeling of PS I, however, the (P700+-P700) FTIR difference spectra are considerably altered. From spectra obtained using PS I particles grown in D2O and H2O, a (1H-2H) isotope edited double difference spectrum was constructed, and it is shown that all difference bands associated with ester/keto carbonyl modes of the chlorophylls of P700 and P700+ downshift 4–5/1–3cm−1 upon 2H labeling, respectively. It is also shown that the ester and keto carbonyl modes of the chlorophylls of P700 need not be heterogeneously distributed in frequency. Finally, we find no evidence for the presence of a cysteine mode in our difference spectra. The spectrum obtained using 2H labeled PS I particles indicates that a negative difference band at 1698cm−1 is associated with at least two species. The observed 15N and 2H induced band shifts strongly support the idea that the two species are the 131 keto carbonyl modes of both chlorophylls of P700. We also show that a negative difference band at ∼1639cm−1 is somewhat modified in intensity, but unaltered in frequency, upon 2H labeling. This indicates that this band is not associated with a strongly hydrogen bonded keto carbonyl mode of one of the chlorophylls of P700

Exploring the drivers of tracking error constrained portfolio performance

Maximising returns is often the primary goal of asset management but managing and mitigating portfolio risk also plays a significant role. Successful active investing requires outperformance of a benchmark through skillful stock selection and market timing, but these bets necessarily give rise to risk. The risk, relative to the benchmark, is the tracking error and active managers are constrained by investment mandates including a restriction on tracking error. The locus of possible portfolio risks and returns, constrained by a tracking error is elliptical, and the main axis slope’s sign and magnitude varies under different market conditions. How these variations affect portfolio performance is explored for the first time. We find that changes in main axis slope (magnitude and sign) acts as an early indicator of portfolio performance and could therefore be used as another risk management tool.https://www.tandfonline.com/loi/oaef20am2020Mathematics and Applied Mathematic

The Predictive Relationship Between Psychological Capital and Academic Burnout in Postgraduate Students

Purpose: The purpose of this quantitative correlational study was to determine if, or to what extent, the composite and sub-composite categories of Psychological Capital (PsyCap) predict academic burnout in American postgraduate health science students at a university in the Southeastern United States. Methods: The variables of the study were measured by the Psychological Capital Questionnaire (PCQ-24) and the Maslach Burnout Inventory-Student Survey (MBI-SS). A convenience sampling method was used to collect data from the target population, which included a final sample of 90 health science postgraduate students. Results: A simple linear regression analysis revealed that PsyCap was a significant and negative predictor of academic burnout (F(1,88) = 12.00, p \u3c .001, R2 = 0.12; B = -0.28, t(88) = -3.46, p \u3c .001). Additionally, multiple linear regression analysis revealed that only one sub-category of PsyCap, labeled as Optimism, was a significant and negative predictor of academic burnout (F(4,85) = 5.17, p \u3c .001, R2= 0.20; B = -0.90, t(85) = -3.17, p = .002). Conclusion: The findings may be used by higher education instructors, advisors, and administrators in the United States to adopt policies, practices, programs, student advising, and student mentorship that foster PsyCap and Optimism development in students, which may mitigate the risks and consequences of academic burnout