Are We Having Fun Yet? Savoring, Type A Behavior, and Vacation Enjoyment

Although studies of Type A behavior ceased in the early 1990s because of failures to replicate its connections with heart disease, the Type A behavior pattern of speed, impatience, perfectionism, drivenness, and hostility may nevertheless be important in understanding individual differences in the subjective quality of life. The present study tested the hypothesis that Type A behavior undermines the enjoyment of leisure time and that this detrimental effect is mediated by savoring responses that hamper enjoyment. Confirming hypotheses, analysis of self-report survey data (N = 764) revealed that: (a) higher levels of Type A impatience in social situations predicted significantly less vacation enjoyment; (b) social impatience predicted significantly lower levels of memory building and counting blessings, and higher levels of kill-joy thinking, as savoring responses to vacation experiences, which in turn predicted less enjoyment; and (c) variations in these three savoring responses significantly mediated the link between Type A impatience and enjoyment, and together explained 85% of the total effect of impatience on vacation enjoyment. Furthermore, Type A impatience significantly predicted kill-joy thoughts about how one’s vacation could have been better, but not kill-joy thoughts about other things one should be doing instead of vacationing, suggesting that A-B differences in dampening savoring responses reflect differences in perfectionism rather than time urgency. Finally, temporal awareness moderated the detrimental impact of Type A impatience on enjoyment, by weakening the negative relationship between impatience and enjoyment. Clearly, Type A behavior has implications for understanding the quality, if not the quantity, of people’s lives

Phase diagram and structural properties of a simple model for one-patch particles

We study the thermodynamic and structural properties of a simple, one-patch fluid model using the reference hypernetted-chain (RHNC) integral equation and specialized Monte Carlo simulations. In this model, the interacting particles are hard spheres, each of which carries a single identical, arbitrarily-oriented, attractive circular patch on its surface; two spheres attract via a simple square-well potential only if the two patches on the spheres face each other within a specific angular range dictated by the size of the patch. For a ratio of attractive to repulsive surface of 0.8, we construct the RHNC fluid-fluid separation curve and compare with that obtained by Gibbs ensemble and grand canonical Monte Carlo simulations. We find that RHNC provides a quick and highly reliable estimate for the position of the fluid-fluid critical line. In addition, it gives a detailed (though approximate) description of all structural properties and their dependence on patch size.Comment: 27 pages, 10 figures, J. Chem. Phys. in pres

Here Today, Gone Tomorrow: Understanding Freshman Attrition Using Person-Environment Fit Theory

Person-Environment (PE) fit theory was used to explore the relationship between student involvement and freshman retention. Incoming freshmen (N=382) were followed longitudinally in a twowave panel study, the summer before beginning college, and again during the spring of their freshman year. Involvement levels, a variety of summer and spring preferences (Ps), and spring perceptions (Es) regarding specific aspects of their college environment were assessed. Twelve PE fit indicators were derived and compared with respect to their relationship with student involvement and retention. Results indicated that involvement was linked to some PE fit indicators. Traditional parametric statistical analyses were compared with a new, nonparametric technique, Classification Tree Analysis (CTA), to identify the most accurate classification model for use in designing potential attrition interventions. Discriminant analysis was 14% more accurate than CTA in classifying returners (97% vs. 85%), but CTA was 962% more accurate classifying dropouts (8% vs. 84%). CTA identified nine clusters— five of returners and four of dropouts, revealing that different subgroups of freshmen chose to return (and stay) for different reasons. Students’ end-of-the-year preferences appear to be more important than anticipated preferences, college perceptions, or PE fit level

The Effects on Toxicity of Circadian Patterning of Continuous Hepatic Artery Infusion

Long term continuous hepatic artery infusion of FUDR was carried out in 34 rats. In the animals who received a constant infusion schedule of 15mg/kg/day all died of toxicity with a mean survival of 9.3 days. If the pattern of the continuous infusion was changed so that over 60% of the infusion was given during the hours of 3pm to 9pm then all of the animals survived the 14 day infusion. If the maximum dose of infusion was changed so that 60% of the infusion was given at night from 3am to 9am the infusion became more toxic and all the animals died in a mean of 5.5 days. Pathologic sectioning of all the livers reflected the above outcomes with the greatest amount of hepatic necrosis in the animals on the night cycles. This study underscores the recent advances in chronobiology demonstrating that for continuous hepatic arterial infusions the timing of delivery is crucial in determining the toxicity

Savoring the moment: A link between affectivity and depression

Objective: Positive affectivity (PA; disposition to experience positive moods) and negative affectivity (NA; disposition to experience negative moods) may be risk factors for depression. Low PA may impair positive emotion regulation (savoring), potentially exacerbating depression. Understanding the mechanisms in which temporal domains of savoring influence the relationship between affectivity and depression may help advance depression treatments.Method: 1,618 participants (1,243 females; 70.0% Caucasian, 19.1% Asian, 4.5% African American, 0.9% Pacific Islander, 0.7% American Indian or Alaskan Native, 4.9% Biracial) ages 17 - 40 (M = 18.99, SD = 1.33) completed questionnaires. An exploratory path analysis was run with PA and NA as exogenous variables, savoring domains as mediators, and depression the outcome.Results: PA and NA were associated with depression and all three savoring temporal domains. Momentary savoring distinctly mediated the relationship between both PA and NA and depression.Limitations: The data are self-report and cross-sectional, precluding causal inference. Post-hoc power analysis indicated that the present study was underpowered. The use of a college sample primarily comprised of Caucasian women limits generalizability.Conclusions: Affectivity was associated with the temporal domains of savoring and indirectly associated with depression via momentary savoring. All temporal domains of savoring may bolster PA and mitigate NA. Momentary savoring may reduce depression symptoms in individuals with low PA and high NA

Effectiveness of Subgingival Scaling and Root Planing: Single Versus Multiple Episodes of Instrumentation

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142277/1/jper0367.pd

Proteomic analysis of Arabidopsis glutathione S-transferases from benoxacor- and copper-treated seedlings

Glutathione S-transferases (GSTs) are involved in many stress responses in plants, for example, participating in the detoxification of xenobiotics and limiting oxidative damage. Studies examining the regulation of this gene family in diverse plant species have focused primarily on RNA expression. A proteomics method was developed to identify GSTs expressed in Arabidopsis seedlings and to determine how the abundance of these proteins changed in response to copper, a promoter of oxidative stress, and benoxacor, a herbicide safener. Eight GSTs were identified in seedlings grown under control conditions, and only one, AtGSTU19, was induced by benoxacor. In contrast, four GSTs, AtGSTF2, AtGSTF6, AtGSTF7, and AtGSTU19, were significantly more abundant in copper-treated seedlings. The different responses to these treatments may reflect the potential for copper to affect many more aspects of plant growth and physiology compared with a herbicide safener. Differences between RNA and protein expression of GSTs indicate that both transcriptional and translational mechanisms are involved in regulation of GSTs under these conditions

Panel Discussion: Expropriation, Threats of Expropriation and Developmental Policy

This panel discussion is a conversation about the place of expropriation in international law

Temperature dependence of phonons in FeGe_2

Inelastic neutron scattering was used to measure phonon dispersions in a single crystal of FeGe_2 with the C16 structure at 300, 500, and 635 K. Phonon densities of states (DOS) were also measured on polycrystalline FeGe_2 from 325 to 1050 K, and the Fe partial DOS was obtained from polycrystalline ^(57)FeGe_2 at 300 K using nuclear resonant inelastic x-ray scattering. The dominant feature in the temperature dependence of the phonon spectrum is thermal broadening of high-energy modes. The energy shifts of the low- and high-energy parts of the spectrum were almost the same. DFT calculations performed with the quasiharmonic approximation gave results in moderate agreement with the experimental thermal energy shifts, although the isobaric Grüneisen parameter calculated from the quasiharmonic model was smaller than that from measurements. The thermal broadening of the phonon spectrum and dispersions, especially at high energies, indicates a cubic anharmonicity to second order that should also induce phonon shifts. We show that different anharmonic contributions cancel out, giving average phonon shifts in moderate agreement to calculations with the quasiharmonic approximation. The different parts of the large phonon contribution to the entropy are separated for FeGe_2, showing modest but interpretable anharmonic contributions