HELP, IS IT WORTH IT FOR ME(N)?: A STUDY OF FACTORS AFFECTING BLACK MEN\u27S PERCEPTION OF RESOURCE MANAGEMENT STRATEGIES IN COMMUNITY COLLEGE

Nationally, men of color are graduating college at the lowest rates of all race gender subgroups. Prior research suggests this population faces unique obstacles as it relates to race and gender and these challenges are often invisible and difficult to resolve. Academic supports can help students overcome these obstacles; however, it is not clear that they are influencing Black men’s academic help-seeking behavior and, thus, their educational outcomes. Using the Motivated Learning Strategies Questionnaire and data from Knight Community College, two multiple regressions and three t-test were used to explore the relationship between value, expectancy, program participation and resource management strategies for an English 101 course. This research may help understand perceptions of resource management and identify predictive relationships. Additionally, findings may provide new strategies and initiatives may be innovated

Letter from John E. King and J. Tolbert Bushong to Brother Larimore

Letter from J. Tolbert Bushong and John E. King on South Florida Seminary letterhead and John E. King stationery to Theophilus Brown Larimore. The correspondence is handwritten and three pages long. The letter is dated 1912 February 22. There is a transcript of the correspondence in the item PDF

Cough Desensitization Treatment: Combination of Desensitization and Cough Suppression

Chronic cough (CC) is a cough that persists longer than 8 weeks. CC impacts 11% of Americans and 20% of those do not respond to standard medical treatment and are diagnosed with refractory chronic cough (RCC). Research shows that most of these patients suffer from RCC due to hypersensitivity of airway sensory nerves. The purpose of the current study is to gradually desensitize the nerves that regulate the cough reflex in patients with RCC through cough desensitization treatment (CDT). CDT combines repeated exposure to aerosolized capsaicin, a known cough stimulant found within chili peppers, in increasing doses while actively suppressing cough. This study is a randomized, placebo-controlled clinical trial. Participants attend up to 12 treatment sessions where they are exposed to the active treatment or placebo. The treatment group receives progressive doses of aerosolized capsaicin, while actively suppressing their cough. The placebo group receives aerosolized saline and isn’t coached to suppress their cough. Outcome measures include (1) Leicester Cough Questionnaire (a validated patient-report measure), (2) urge-to-cough (UTC) testing (cough frequency and perceived UTC following exposure to various cough stimulants), (3) a visual-analogue scale of overall cough severity from 0 (no cough) to 100 (maximum cough), and (4) cough-reflex sensory testing. Seventeen participants (eight placebo, nine treatment) have completed the study. We anticipate an additional 1-3 participants will complete the study by UMCUR. Our data thus far looks encouraging with the treatment group showing greater improvement than the placebo group on every measure. The 1-week posttest mean change in LCQ was 5.53 and 3.28 in the treatment and placebo groups, respectively. Mean reduction in VAS was 32.67 points and 8.75, respectively. Mean change in cough-reflex threshold was 1.12 and .12, respectively. Statistical analysis will be included in the final presentation

Tension on JAM-A activates RhoA via GEF-H1 and p115 RhoGEF

Junctional adhesion molecule A (JAM-A) is a broadly expressed adhesion molecule that regulates cell–cell contacts and facilitates leukocyte transendothelial migration. The latter occurs through interactions with the integrin LFA-1. Although we understand much about JAM-A, little is known regarding the protein’s role in mechanotransduction or as a modulator of RhoA signaling. We found that tension imposed on JAM-A activates RhoA, which leads to increased cell stiffness. Activation of RhoA in this system depends on PI3K-mediated activation of GEF-H1 and p115 RhoGEF. These two GEFs are further regulated by FAK/ERK and Src family kinases, respectively. Finally, we show that phosphorylation of JAM-A at Ser-284 is required for RhoA activation in response to tension. These data demonstrate a direct role of JAM-A in mechanosignaling and control of RhoA and implicate Src family kinases in the regulation of p115 RhoGEF

Depositional ice nucleation on solid ammonium sulfate and glutaric acid particles

Heterogeneous ice nucleation on solid ammonium sulfate and glutaric acid particles was studied using optical microscopy and Raman spectroscopy. Optical microscopy was used to detect selective nucleation events as water vapor was slowly introduced into an environmental sample cell. Particles that nucleated ice were dried via sublimation and examined in detail using Raman spectroscopy. Depositional ice nucleation is highly selective and occurred preferentially on just a few ammonium sulfate and glutaric acid particles in each sample. For freezing temperatures between 214 K and 235 K an average ice saturation ratio of <i>S</i> = 1.10±0.07 for solid ammonium sulfate was observed. Over the same temperature range, S values observed for ice nucleation on glutaric acid particles increased from 1.2 at 235 K to 1.6 at 218 K. Experiments with externally mixed particles further show that ammonium sulfate is a more potent ice nucleus than glutaric acid. Our results suggest that heterogeneous nucleation on ammonium sulfate may be an important pathway for atmospheric ice nucleation and cirrus cloud formation when solid ammonium sulfate aerosol particles are available for ice formation. This pathway for ice formation may be particularly significant near the tropical tropopause region where sulfates are abundant and other species known to be good ice nuclei are depleted

Ice Nucleation in Internally Mixed Ammonium Sulfate/Dicarboxylic Acid Particles

Recent studies have shown that tropospheric sulfate aerosols commonly contain 50% or more by mass organic species. The influence of these organics on the chemical and physical properties of sulfate aerosols is not fully established. Using an aerosol flow tube technique, we have determined ice nucleation temperatures for particles composed of ammonium sulfate and mixtures of ammonium sulfate with a series of dicarboxylic acids. A calibration curve was developed to allow us to convert the freezing temperatures to a saturation ratio required for ice nucleation. At levels detectable by our experimental technique we find that the freezing temperatures and critical ice saturation ratios of each system were identical, for a given water activity of the solution, even though the solutions contained varying fractions of inorganic and organic components. Further experiments showed that the freezing behavior of pure dicarboxylic acid particles was identical to that of the other systems studied if the water activity was identical. Although the apparent freezing temperatures reported here are substantially warmer than those predicted by the water activity based nucleation theory of T. Koop et al., we find that solution water activity defined the freezing conditions for the systems studied here

Group Gender Composition and Work Group Relations: Theories, Evidence, and Issues

[Excerpt] Prior to the publication of Kanter\u27s seminal Men and Women of the Corporation in 1977, the field of organizational studies exhibited a striking degree of oblivion to the effect of gender relations on work group dynamics. This neglect may have been due, in part, to the relatively small proportion of women in the labor force in the first half of the 20th century, as well as to high levels of occupational and job segregation, which helped conceal the influence of group gender composition on individual and group behavior. In the postwar years, however, women\u27s rate of entry into the labor force nearly doubled that of the preceding three decades, and women began to occupy many jobs and occupations that had been the near-exclusive province of men. In this context, Kanter\u27s provocative analysis of the impact of work group gender composition on group relations served as the impetus for an outpouring of both theoretical and empirical work. Studies following Kanter\u27s have explored the effects of gender composition on a wide range of outcomes, based on a variety of theoretical perspectives. In this chapter, we review five major theoretical paradigms that, singly or in combination, have provided the underpinning for most empirical studies, then review the findings from empirical work, focusing on the degree to which they provide support for each perspective. In concluding, we identify several avenues that merit greater attention in future research and theorizing

Depositional Ice Nucleation on Solid Ammonium Sulfate and Glutaric Acid Particles

Heterogeneous ice nucleation on solid ammonium sulfate and glutaric acid particles was studied using optical microscopy and Raman spectroscopy. Optical microscopy was used to detect selective nucleation events as water vapor was slowly introduced into an environmental sample cell. Particles that nucleated ice were dried via sublimation and examined in detail using Raman spectroscopy. Depositional ice nucleation is highly selective and occurred preferentially on just a few ammonium sulfate and glutaric acid particles in each sample. For freezing temperatures between 214 K and 235 K an average ice saturation ratio of S = 1.10±0.07 for solid ammonium sulfate was observed. Over the same temperature range, S values observed for ice nucleation on glutaric acid particles increased from 1.2 at 235 K to 1.6 at 218 K. Experiments with externally mixed particles further show that ammonium sulfate is a more potent ice nucleus than glutaric acid. Our results suggest that heterogeneous nucleation on ammonium sulfate may be an important pathway for atmospheric ice nucleation and cirrus cloud formation when solid ammonium sulfate aerosol particles are available for ice formation. This pathway for ice formation may be particularly significant near the tropical tropopause region where sulfates are abundant and other species known to be good ice nuclei are depleted

Laboratory Studies of Ice Formation Pathways from Ammonium Sulfate Particles

Cirrus clouds are composed of ice particles and their formation pathways have been studied extensively in the laboratory. The ability of ammonium sulfate particles to act as nuclei for cirrus clouds has been of particular importance because of their ubiquitous presence in the upper troposphere. The results of past laboratory experiments of homogeneous ice nucleation from ammonium sulfate particles show a wide range of freezing conditions. In the present study, a flow tube apparatus equipped with Fourier transform infrared spectroscopy was used to reexamine these discrepancies. It was found that when ammonium sulfate particles were preconditioned at 100% relative humidity (RH) prior to experimentation, the particles began to freeze at conditions predicted by the homogeneous ice nucleation model developed by Koop et al. (2000). If the particles were not preconditioned at 100% RH, some froze at warmer temperatures and lower ice saturation ratios than predicted by Koop et al. (2000). It is hypothesized that a population of effloresced particles affected freezing conditions for particles that were not preconditioned at 100% RH