Abstention and Costly Information Acquisition in Elections

Voter turnout rates are low in the United States. Even among citizens who show up to the polls, many do not vote in every race on the ballot. This is especially true for low-profile elections, and races where political party is not on the ballot. Both low turn out and incomplete ballots could be caused by high costs of information. Voters and non-voters have time constraints that can prevent them from researching every candidate or proposition on the ballot. One proposed solution to increase citizen informedness is to make voting mandatory. Mandatory voting imposes a penalty (usually a fine) if a citizen fails to turn out on election day. While the introduction of mandatory voting may increase turnout rates, it is unclear if it will lead to a more informed electorate. I explore the effects of mandatory voting on information acquisition by developing a model that compares citizen informedness in a costly election under both mandatory and optional voting schemes. I find that optional voting results in a more informed electorate, unless information acquisition is free or extremely cheap relative to the cost of voting. The model predicts that moderate citizens are less likely to learn about candidate preferences, compared to citizens with more extreme preferences

Nonworksite Interventions to Reduce Sedentary Behavior among Adults: A Systematic Review

Sedentary behavior has been identified as a major health risk. Although interventions to reduce time spent sedentary have become increasingly prevalent, the vast majority of this work in adults has been focused on workplace sedentary behavior and often pairs sedentary reduction interventions with increasing physical activity. As research designed to specifically decrease sedentary time that is not limited to the workplace becomes available, identifying strategies and approaches, along with feasibility and efficacy of these interventions, is warranted. Electronic databases were searched for sedentary interventions with eligibility criteria, including (a) interventions designed to explicitly reduce sedentary behavior that were not limited to the workplace, (b) outcomes specific to sedentary behavior, (c) adults at least 18 yr of age, and (d) written in English. A total of 767 full-text manuscripts were identified, with 13 studies meeting all eligibility criteria. Although intervention characteristics and methodological quality varied greatly among studies, 10 of the 13 studies observed a significant reduction in objectively measured sitting time postintervention. In those studies that collected participant feasibility/acceptability data, all reported that the intervention was viewed as “favorable to very favorable,” would use again, and that participant burden was quite low, suggesting that these interventions were feasible. Sedentary behavior interventions not limited to the workplace appear to be largely efficacious. Although results varied with respect to the magnitude of the decrease in time spent sedentary, they are encouraging. However, because of the small body of evidence and the variability of study designs, our ability to make overarching statements regarding “best practices” at this time is limited. Well-controlled trials of longer duration with larger samples, using theoretically based interventions with consistent prescriptions for limiting sedentary time, are needed

Serum Endocannabinoid and Mood Changes after Exercise in Major Depressive Disorder

MEYER, J. D., K. M. CROMBIE, D. B. COOK, C. J. HILLARD, and K. F. KOLTYN. Serum Endocannabinoid and Mood Changes after Exercise in Major Depressive Disorder. Med. Sci. Sports Exerc., Vol. 51, No. 9, pp. 1909–1917, 2019. The endocannabinoid (eCB) system is implicated in the pathophysiology of depression and is responsive to acute exercise in healthy adults. Purpose: We aimed to describe acute changes in serum eCB across a prescribed moderate (MOD) and a self-selected/preferred (PREF) intensity exercise session in women with major depressive disorder (MDD) and determine relationships between changes in eCB and mood states. Methods: Women with MDD (n = 17) exercised in separate sessions for 20 min on a cycle ergometer at both MOD or PREF in a within-subjects design. Blood was drawn before and within 10 min after exercise. Serum concentrations of eCB (anandamide [AEA], 2-arachidonoylglycerol) and related lipids (palmitoylethanolamine, oleoylethanolamine, 2-oleoylglycerol) were quantified using stable isotope-dilution, liquid chromatography/mass spectrometry/mass spectrometry. The profile of mood states and state-trait anxiety inventory (state only) were completed before, 10 min and 30 min postexercise. Results: Significant elevations in AEA (P = 0.013) and oleoylethanolamine (P = 0.024) occurred for MOD (moderate effect sizes: Cohen’s d = 0.58 and 0.41, respectively). Significant (P \u3c 0.05) moderate negative associations existed between changes in AEA and mood states for MOD at 10 min (depression, confusion, fatigue, total mood disturbance [TMD] and state anxiety) and 30 min postexercise (confusion, TMD and state anxiety). Significant (P \u3c 0.05) moderate negative associations existed between 2-arachidonoylglycerol and mood states at 10 min (depression and confusion) and 30 min postexercise (confusion and TMD). Changes in eCB or related lipids or eCB–mood relationships were not found for PREF. Conclusion: Given the broad, moderate–strength relationships between improvements in mood states and eCB increases after MOD, it is plausible that the eCB system contributes to the mood-enhancing effects of prescribed acute exercise in MDD. Alternative mechanisms are likely involved in the positive mood state effects of preferred exercis

Benefits of 8-wk Mindfulness-based Stress Reduction or Aerobic Training on Seasonal Declines in Physical Activity

Mindfulness-based stress reduction (MBSR) and aerobic exercise training (AET) programs improve health and well-being. Exercise participation has been related to mindfulness and may be altered by MBSR training. Purpose This study aimed to compare 8 wk of MBSR, AET, and no-treatment control during the fall season on objectively measured physical activity in healthy adults. Methods Participants (n = 66) wore an ActiGraph GT3X+ accelerometer for 7 d prerandomization and after 8 wk MBSR or AET interventions, or neither (control). Mean daily minutes (min) of moderate-to-vigorous physical activities (MVPA) were calculated along with weekly time spent in bouts of MVPA ≥10 min (MVPABouts) to assess physical activity sufficient to meet national guidelines. Groups were compared on pairwise changes in outcomes across time. Effect sizes were calculated using Cohen’s d. Results Sufficient data (≥3 weekdays, ≥1 weekend day, and ≥10 h·d−1) were obtained from 49 participants (18 MBSR, 14 AET, and 17 control). Daily MVPA decreased in all groups from prerandomization to postintervention (August to November); control decreased 17.9 ± 25.7 min·d−1, MBSR decreased 5.7 ± 7.5 min·d−1, and AET decreased 7.4 ± 14.3 min·d−1 (mean ± SD), without significant differences among the groups (all P \u3e 0.05). MVPABouts decreased 77.3 ± 106.6 min·wk−1 in control and 15.5 ± 37.0 min·wk−1 in MBSR (between-group difference: P = 0.08; d = 0.86), whereas it increased by 5.7 ± 64.1 min·wk−1 in AET (compared with control: P = 0.029; d = 0.97; compared with MBSR; P = 0.564; d = 0.29). Conclusion Data from participants in a randomized controlled trial showed that although AET increases MVPA bouts compared with no treatment, MBSR training may also mitigate the influence of shorter day length and cooler weather on participation in physical activities. Future research is needed to determine how MBSR affects exercise to inform interventions. Interventions combining MBSR and exercise may be particularly successful at increasing physical activity participation

Symptom variability following acute exercise in myalgic encephalomyelitis/chronic fatigue syndrome: a perspective on measuring post-exertion malaise

Background: Consensus for an operational definition of post-exertion malaise (PEM) and which symptoms best characterize PEM has not been established and may be due to variability within and between studies. Purpose: Determine the magnitude of the effect of maximal and submaximal physical exertion on multiple myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) symptoms that are associated with PEM and explore variability among two studies in which mood, fatigue, and pain symptoms were measured before and after exercise. Methods: Symptoms were measured before, and 48 and 72 hours after exercise in study 1 (ME/CFS = 13; Controls = 11) and before and 24 hours after exercise in study 2 (ME/CFS = 15, Controls = 15). Between-study variability was examined by comparing Hedges d effect sizes (95% CI) from studies 1 and 2. Within-patient group variability was examined via inspection of dot density plots. Results: In study 1, large increases in general fatigue (Δ = 1.05), reduced motivation (Δ = 0.93), feelings of fatigue (Δ = 0.90), feelings of confusion (Δ = 0.93), and total mood disturbance (Δ = 0.90) were found at 72 hours. In study 2, a large increase in affective/sensory pain (Δ = 0.79) was found at 24 hours. Dot density plots in both studies revealed substantial variability among people with ME/CFS relative to healthy control participants. Conclusions: PEM symptoms are variable among people with ME/CFS and several gaps in the literature need to be addressed before guidelines for measuring PEM in the clinical or research setting can be established

The differential effects of occupying a high school position of leadership and collegiate involvement

We examined the effect of occupying a high school position of leadership on collegiate involvement. Our goal was to better understand the extent to which possessing a position of leadership in high school affected the number of hours students spend in student college organizations, the number of organizations students participated in college, and the number of semesters for which students are involved in college. The study investigated members of registered student organizations (n=758) during the Fall 2016 semester. Within this single-campus study, findings suggest the vast majority of student active in collegiate organizations occupied a position of leadership while in high school and has a significant effect in determining collegiate involvement. Occupying leadership positions in high school were predictive of collegiate involvement only in the number of organizations students participated in college and number of semesters for which students were involved

ORIGIN OF SEPTARIAN CONCRETIONS IN THE HURON MEMBER OF THE OHIO SHALE (DEVONIAN), DELAWARE COUNTY, OHIO

One of the lesser understood features of concretions is a variety of heavily fractured concretions, named septarian concretions. By taking a new approach in the study of septarian fracture patterns, it is possible to connect the episode of fracturing to a wider tectonic event and better understand how and when they fractured. In March 2019, such a study was performed on the septarian concretions of Shale Hollow Park in Columbus, Ohio. The pattern of their fractures as well as observations made on the surrounding shale unit suggest the presence of two fracturing episodes. One episode appears in the concretions but fractures in the surrounding shale lack the pattern, suggesting the first episode of fracturing occurred after concretion formation but before the lithification of the surrounding shale. If the concretion was formed and brittle enough for tensile failure while the surrounding shale was not, this has implications for the time required to form a concretion. Contrary to the traditional view on concretion formation, this suggests that concretions formed synsedimentary. The second episode of fracturing is reflected in the joints of the surrounding shale and fractures that only pierced the outer ring of the concretions. This suggests a possible compositional similarity between the shale and the outer ring of the concretions. These conclusions could be tested by similar studies of septarian concretions in the corresponding Upper Devonian black shales in other localities. A geochemical analysis of the outer rings could prove insightful too.School of Earth Sciences Field Camp Travel FundEdmund M. Spieker Memorial ScholarshipNo embarg

The InfraRed Imaging Spectrograph (IRIS) for TMT: Reflective ruled diffraction grating performance testing and discussion

We present the efficiency of near-infrared reflective ruled diffraction gratings designed for the InfraRed Imaging Spectrograph (IRIS). IRIS is a first light, integral field spectrograph and imager for the Thirty Meter Telescope (TMT) and narrow field infrared adaptive optics system (NFIRAOS). We present our experimental setup and analysis of the efficiency of selected reflective diffraction gratings. These measurements are used as a comparison sample against selected candidate Volume Phase Holographic (VPH) gratings (see Chen et al., this conference). We investigate the efficiencies of five ruled gratings designed for IRIS from two separate vendors. Three of the gratings accept a bandpass of 1.19-1.37 {\mu}m (J band) with ideal spectral resolutions of R=4000 and R=8000, groove densities of 249 and 516 lines/mm, and blaze angles of 9.86 and 20.54 degrees, respectively. The other two gratings accept a bandpass of 1.51-1.82 {\mu}m (H Band) with an ideal spectral resolution of R=4000, groove density of 141 lines/mm, and blaze angle of 9.86{\deg}. We measure the efficiencies off blaze angle for all gratings and the efficiencies between the polarization transverse magnetic (TM) and transverse electric (TE) states. The peak reflective efficiencies are 98.90 +/- 3.36% (TM) and 84.99 +/- 2.74% (TM) for the H-band R=4000 and J-band R=4000 respectively. The peak reflective efficiency for the J-band R=8000 grating is 78.78 +/- 2.54% (TE). We find that these ruled gratings do not exhibit a wide dependency on incident angle within +/-3{\deg}. Our best-manufactured gratings were found to exhibit a dependency on the polarization state of the incident beam with a ~10-20% deviation, consistent with the theoretical efficiency predictions.Comment: Proceedings of the SPIE, 9147-34