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Objective: Examining the personality and well‐being correlates of positive event diversity. Background: Past research has highlighted that personality traits are linked to the frequency of daily positive events. This study is the first to examine positive event diversity, the extent to which positive events are spread across multiple types of positive life domains, as well as its personality and well‐being correlates. Method: We conducted parallel analyses of three daily diary datasets (Ns = 1919, 744, and 1392) that included evening assessment of daily positive events and affective well‐being. The Big Five personality traits were assessed in baseline surveys. Results: Positive Event Diversity was related to higher person‐mean daily positive affect but not negative affect. Higher Extraversion, Agreeableness, Openness, and lower Neuroticism were correlated with more positive event diversity. These associations became nonsignificant when controlling for positive event frequency. Positive event frequency moderated the link between positive event diversity and person‐mean affect, such that higher positive event diversity was associated with higher negative and lower positive affect for people who experienced more frequent positive events. Conclusions: No consistent evidence was found for personality as a moderator of the positive event diversity–well‐being link across the three studies. Further, the well‐being implications of positive event diversity may be better understood when interpreting them alongside indexes of positive event frequency. [ABSTRACT FROM AUTHOR]

Objectives Cross-sectional studies suggest that individuals who perceive a broader future horizon may be more likely to consider the future consequences of their actions and, as a result, engage in healthy lifestyle behaviors. However, research has yet to consider how this association plays out on the daily level. Methods The present study used daily diary data from a sample of 198 older adults aged 60 years and older (M  = 63.34, SD  = 3.29) to investigate the relationship between daily future time perspective (FTP) and daily health behavior. Participants reported on sociodemographic characteristics during baseline surveys and completed daily diary measures of FTP and health behavior (e.g. nutrition, exercise, social/leisure activity) across 14 days. Multilevel modeling was used to examine within- and between-person associations between daily FTP and health behavior. Results Daily FTP was significantly associated with daily health behavior at the within- but not at the between-person level. Counter to past cross-sectional work, results revealed that individuals showed increased engagement in health behavior on days when they reported a more limited FTP. Discussion Findings highlight the importance of moving beyond the between-person level to consider how FTP fluctuates from day-to-day and relates to health behavior in everyday life. Older adults who view a more limited time horizon may be motivated to increase that future through healthier activities. [ABSTRACT FROM AUTHOR]

Past work has suggested a need for a theme of purpose in life surrounding activism, defined as one’s purpose in life concerning the pursuit of social or political change. However, the combination of activism and purpose research yields the potential for conflicting predictions regarding the wellbeing of individuals in this pursuit, given activists often report lower wellbeing while sense of purpose is linked to better psychological wellbeing. The current study (n = 1975; Mage = 49.23) examined the wellbeing correlates of activist purpose commitment, to gain better insights into how activists continue toward their purposeful pursuits. Results demonstrate that activist purpose commitment, as expected, are relatively low in the general public. Of interest, activist purpose levels positively correlate with indicators both of wellbeing and psychological concerns, underscoring the duality of this construct. For instance, individuals with a stronger activist purpose tend to report better resilience and hope, as well as greater depressive and anxiety symptoms. Future work is needed to better understand what factors predict activist purpose development, as well as the consequences that activist purpose has for the individual. [ABSTRACT FROM AUTHOR]

Conscientiousness and sense of purpose consistently predict health, wellbeing, and health behavior. However, it remains an open question whether they are unique or overlapping predictors of health and wellbeing. The current study considered this question using the MOSAiCH study, a nationally representative sample of 2305 Swiss adults (M : 52.33 years old; SD = 17.36). Participants reported on sense of purpose and conscientiousness, in addition to multiple health, wellbeing, and health behavior indicators (e.g. dietary practices, activity engagement, health conditions, psychological concerns, and doctor visits). Results found conscientiousness and sense of purpose were moderately associated with multiple health, wellbeing, and health behavior indicators. Bifactor modeling was employed to test the incremental validity of conscientiousness and sense of purpose, when accounting for their shared variance. The specific factor for purpose predicted outcomes even when accounting for conscientiousness. However, conscientiousness had little incremental validity over the general factor. [ABSTRACT FROM AUTHOR]

Background: The dynamic collimation system (DCS) provides energy layer‐specific collimation for pencil beam scanning (PBS) proton therapy using two pairs of orthogonal nickel trimmer blades. While excellent measurement‐to‐calculation agreement has been demonstrated for simple cube‐shaped DCS‐trimmed dose distributions, no comparison of measurement and dose calculation has been made for patient‐specific treatment plans. Purpose: To validate a patient‐specific quality assurance (PSQA) process for DCS‐trimmed PBS treatment plans and evaluate the agreement between measured and calculated dose distributions. Methods: Three intracranial patient cases were considered. Standard uncollimated PBS and DCS‐collimated treatment plans were generated for each patient using the Astroid treatment planning system (TPS). Plans were recalculated in a water phantom and delivered at the Miami Cancer Institute (MCI) using an Ion Beam Applications (IBA) dedicated nozzle system and prototype DCS. Planar dose measurements were acquired at two depths within low‐gradient regions of the target volume using an IBA MatriXX ion chamber array. Results: Measured and calculated dose distributions were compared using 2D gamma analysis with 3%/3 mm criteria and low dose threshold of 10% of the maximum dose. Median gamma pass rates across all plans and measurement depths were 99.0% (PBS) and 98.3% (DCS), with a minimum gamma pass rate of 88.5% (PBS) and 91.2% (DCS). Conclusions: The PSQA process has been validated and experimentally verified for DCS‐collimated PBS. Dosimetric agreement between the measured and calculated doses was demonstrated to be similar for DCS‐collimated PBS to that achievable with noncollimated PBS. [ABSTRACT FROM AUTHOR]

The current study investigated how perceived social support was associated with personality trait development in a Swedish longitudinal sample (n = 3914; mean age = 63.09 years) with six waves of data on individuals' Big Five personality traits, and perceived support from family, friends, and a special someone. We employed random intercept cross-lagged panel models to consider the between- and within-person associations for these constructs over time. First, in almost all cases, between-person associations were found between the levels for personality traits and support variables. Moreover, findings did not differ much depending on the source of the relationship. Second, again in almost every model, significant within-person covariances were evidenced, suggesting that when individuals increased on support relative to their typical level at a given wave, they also tended to report higher levels than they typically do on these traits. Finally, however, little evidence was found for cross-lagged effects in either direction. Across models, only one cross-lagged association even reached significance. In sum, our findings support the close connection between personality and perceived social support in older adulthood, and they motivate future directions into when and why such associations occur using more proximal measurements. Plain language summary: In older adulthood, social relationships take on new meanings and importance compared to earlier in the lifespan. However, work is needed to understand how social relationships may shape the kind of person we are, or our personalities, in older adulthood. The current study examined whether older adults' personality changed in tandem with their social support levels. Older adults were asked to report on their personality and how much they felt supported six times, one year apart. Our findings suggest that when older adults feel more or less supported by others, it often coincides with changes in their personality. [ABSTRACT FROM AUTHOR]

Background: Health complications from diabetes place major strain on individuals, financially and emotionally. The onset and severity of these complications are largely driven by patients' behaviors, making psychosocial factors that influence behaviors key targets for interventions. One promising factor is sense of purpose or the degree to which a person believes their life has direction. Method: The current study investigated whether sense of purpose predicts self-rated health, cardiovascular disease, and smoking status among adults with diabetes concurrently and prospectively. Moreover, it tested whether these associations held across multiple samples and cultures. Coordinated analysis using 12 datasets cross-sectionally and eight longitudinally (total N = 7277) estimated the degree to which sense of purpose is associated with subjective health, smoking status, and cardiovascular disease among adults with diabetes. Coordinated analysis allows for greater generalizability of results across cultures, time periods, and measurement instruments. Datasets were included if they concurrently included a measure of sense of purpose and diabetes status and at least one health measure: self-rated health, current smoking status, or heart condition status. Results: Sense of purpose was associated with higher self-rated health, smoking status, and cardiovascular disease cross-sectionally and self-rated health prospectively. Purpose was unassociated with changes in health over time. Conclusion: These results highlight the relationship of a key individual difference, sense of purpose, to the behaviors and outcomes of adults with diabetes. While more research is needed to determine the boundaries of this relationship, it seems sense of purpose may be considered in the future as a potential target for intervention. [ABSTRACT FROM AUTHOR]

Cognitive gerontology research requires consideration of performance as well as perceptions of performance. While subjective memory is positively associated with memory performance, these correlations typically are modest in magnitude, leading to the need to consider whether certain people may show weaker or stronger linkages between performance and perceptions. The current study leveraged personality (NEO Big Five), memory performance (i.e., word recall), and perceptions of memory ability (i.e., metamemory in adulthood and memory decline) data from the St. Louis Personality and Aging Network (SPAN) study (n = 774, mean age: 71.52 years). Extraversion and conscientiousness held the most consistent associations with the cognitive variables of interest, as both traits were positively associated with metamemory and word recall, but negatively associated with subjective decline. Moreover, extraversion moderated associations between word recall and both memory capacity and complaints, insofar that objective-subjective associations were weaker for those adults higher in extraversion. These findings highlight the need to understand how personality influences the sources of information employed for subjective cognitive beliefs. [ABSTRACT FROM AUTHOR]

Given the developmental benefits associated with higher sense of purpose, past work has aimed to understand how experiences of adversity relate to sense of purpose. With a specific focus on experiences of adversity that may impact individuals from marginalized groups, past work has found that discrimination is related to lower sense of purpose in life, but that these effects are weaker for Black adults relative to White adults. The current research aims to extend past work by examining how and for whom discrimination is related to sense of purpose in life. Moreover, the current work also aimed to understand the extent to which sense of purpose spans across generations and whether there are generational differences in the relationship between discrimination and sense of purpose. Using data from the St. Louis Personality and Aging Network study, 822 parents (G1 participants) and 654 children (G2 participants) completed measures for sense of purpose, major experiences of discrimination, and personality traits. Results found mixed evidence for a relationship between discrimination and sense of purpose, with little evidence for consistent moderators. In addition, while the current work found no evidence of intergenerational associations for sense of purpose, results showed that discrimination was positively associated across generations, suggesting a potential for an intergenerational cycle of marginalization. [ABSTRACT FROM AUTHOR]

Longitudinal research is lacking with respect to how negative emotional reactivity and somatic symptoms during adolescence set the stage for later health. The aim of this longitudinal study was to examine within-person associations between negative emotional reactivity and somatic symptoms during adolescence and their effects on health and wellbeing in adulthood. Participants (N = 1527; 48.3% female) were assessed annually at the age of 12 to 16 years and at the age of 35 and 45 years. Adolescents with frequent somatic symptoms reported higher reactivity. Individual differences in levels and changes of somatic symptoms and reactivity were independently associated with adult health and wellbeing decades later. The findings underscore the importance of considering how individual differences change during adolescent development. [ABSTRACT FROM AUTHOR]

What does a good life look like? The present research investigated individual differences in people's perceptions of the factors that are most important for living a good life using two waves of data in probability samples from the US (MIDUS; N = 4041) and Japan (MIDJA; N = 381). We examined country- and age-related similarities and differences in perceptions of a good life and associations of perceptions of a good life with experiences of wellbeing and physical health. Some factors were considered important for living a good life in both countries and across age (e.g., positive relationships with family), whereas other factors varied between countries (e.g., U.S. participants were more likely to perceive faith as important) and by age (e.g., younger adults were more likely to perceive having a good job as important). Further, perceptions of a good life were related to experiences of wellbeing and physical health concurrently and prospectively. This research informs our understanding of how people differ from one another in their perceptions of a good life, and how these differences may matter for individuals' experiences of a good life. [ABSTRACT FROM AUTHOR]

Sense of purpose is seen as a catalyst for successful ageing, predicting a wide range of health outcomes and mortality. However, its role in fostering subjective well-being during old age has received less attention, especially the bidirectional nature of this relationship. The present study examined how sense of purpose predicts and is predicted by subjective well-being in this life stage. Panel data from the Health and Retirement Study (N = 8980) were used, spanning three measurement occasions across eight years. Four subjective well-being indicators (life satisfaction, depression, positive- and negative affect) were modelled with purpose using (random-intercept) cross-lagged panel models to disentangle within-from between-person associations. We found moderate to strong correlated change and some evidence for directional associations between the constructs. Purpose predicted changes in all four subjective well-being markers, and these associations were generally stronger than the effects of subjective well-being on purpose. Within-person changes in sense of purpose predicted subsequent changes in life satisfaction and positive affect, but not in negative affect and depression. In sum, sense of purpose is associated with higher subjective well-being in old age, but efforts to maintain or increase older adults' sense of purpose may only improve positive components of subjective well-being. [ABSTRACT FROM AUTHOR]

The challenges faced by women in male-dominated occupations are often attributed to the men in, and masculine cultures of, these occupations—and sometimes to senior women in these occupations who may fail to give a "leg up" to the women coming up behind them. As such, prior research has largely focused on challenges that women experience from those of higher or equal status within the occupation and on the negative climate that surrounds women in these positions. We introduce a novel challenge, the status-leveling burden, which is the pressure put on women in male-dominated occupations from women in occupations lower in the institutional hierarchy to be their equal. Drawing on interviews with 45 surgeons, we present a model that unpacks this status-leveling burden. Our research makes novel contributions to the literatures on challenges to women in male-dominated occupations and on shared demography in cross-occupational collaboration, and it suggests new avenues for research at the intersection of gender and occupational status in the workplace. [ABSTRACT FROM AUTHOR]

Sense of purpose, a consistent promoter of successful aging across the lifespan, has been shown in previous research to decline during older adulthood. As such, research is needed to understand how to inform policies around promoting a sense of purpose for older adults, and which adults may need more assistance on this front. One potential mechanism for lower purpose in older adulthood could be due to the more limited financial assets many face following retirement. As such, the current study investigated the cross-sectional associations between different kinds of financial assets and sense of purpose among older adults from the 2006 and 2008 waves of the Health and Retirement Study (n = 9,380). Sense of purpose as well as four financial assets were assessed: physical assets, retirement account assets, investment account assets, and debts. Findings indicated that greater physical assets and retirement account assets predicted a higher sense of purpose, while debt and investment account assets did not. Furthermore, there were no moderating effects of different grouping variables, such as retirement status, race, marital status, subjective health, or wave, on the associations between total net worth and sense of purpose. Findings are discussed regarding why net worth matters for all, and why certain assets may be more important than others when promoting a sense of purpose. [ABSTRACT FROM AUTHOR]

Given the increased threats to health and well-being faced by transgender individuals, research is needed to understand potential protective factors. Recent work has suggested that a sense of purpose may be one of the health-promoting resources available to marginalized groups, and levels of purpose are often similar or even higher among these groups. However, research is limited regarding whether this factor manifests differently among transgender adults. The current study (n = 1968 U.S. adults; 4.3% identified as transgender) asked participants to complete surveys for sense of purpose, self-rated health, life satisfaction and the type of purposes they deemed important. The findings suggest no difference in levels of sense of purpose between transgender and non-transgender adults. Transgender adults reported slightly lower levels of importance across multiple purposes, which merits further investigation into whether they perceive greater obstacles toward those goals. Of central importance, sense of purpose positively correlated with self-rated health (r =.50) and life satisfaction for transgender adults (r =.77), at similar or even greater magnitudes than for the non-transgender adults. These results point to the potential of exploring sense of purpose as an intervention target for promoting transgender health and well-being, and future directions should focus on the multiple pathways by which transgender identity may influence purpose development. [ABSTRACT FROM AUTHOR]

Background: The Dynamic Collimation System (DCS) has been shown to produce superior treatment plans to uncollimated pencil beam scanning (PBS) proton therapy using an in‐house treatment planning system (TPS) designed for research. Clinical implementation of the DCS requires the development and benchmarking of a rigorous dose calculation algorithm that accounts for pencil beam trimming, performs monitor unit calculations to produce deliverable plans at all beam energies, and is ideally implemented with a commercially available TPS. Purpose: To present an analytical Pencil bEam TRimming Algorithm (PETRA) for the DCS, with and without its range shifter, implemented in the Astroid TPS (.decimal, Sanford, Florida, USA). Materials: PETRA was derived by generalizing an existing pencil beam dose calculation model to account for the DCS‐specific effects of lateral penumbra blurring due to the nickel trimmers in two different planes, integral depth dose variation due to the trimming process, and the presence and absence of the range shifter. Tuning parameters were introduced to enable agreement between PETRA and a measurement‐validated Dynamic Collimation Monte Carlo (DCMC) model of the Miami Cancer Institute's IBA Proteus Plus system equipped with the DCS. Trimmer position, spot position, beam energy, and the presence or absence of a range shifter were all used as variables for the characterization of the model. The model was calibrated for pencil beam monitor unit calculations using procedures specified by International Atomic Energy Agency Technical Report Series 398 (IAEA TRS‐398). Results: The integral depth dose curves (IDDs) for energies between 70 MeV and 160 MeV among all simulated trimmer combinations, with and without the ranger shifter, agreed between PETRA and DCMC at the 1%/1 mm 1‐D gamma criteria for 99.99% of points. For lateral dose profiles, the median 2‐D gamma pass rate for all profiles at 1.5%/1.5 mm was 99.99% at the water phantom surface, plateau, and Bragg peak depths without the range shifter and at the surface and Bragg peak depths with the range shifter. The minimum 1.5%/1.5 mm gamma pass rates for the 2‐D profiles at the water phantom surface without and with the range shifter were 98.02% and 97.91%, respectively, and, at the Bragg peak, the minimum pass rates were 97.80% and 97.5%, respectively. Conclusion: The PETRA model for DCS dose calculations was successfully defined and benchmarked for use in a commercially available TPS. [ABSTRACT FROM AUTHOR]

The COVID‐19 pandemic brought new attention to the issues of food insecurity faced by individuals throughout the United States, a stressor exacerbated by disruptions to work status and supply chains. The burden of food insecurity likely carries consequences for whether individuals feel capable of pursuing their broad goals and life engagements; put differently, food insecurity may pose a threat to people perceiving a sense of purpose in life. The current study tested this claim across three samples taken during 2020 (n = 2009), 2021 (n = 1666), and 2022 (n = 1975). Participants completed inventories for perceived food insecurity, sense of purpose, depressive symptoms, and anxiety, among other measures. Results found consistent negative associations between food insecurity and sense of purpose across all three samples. In addition, food insecurity moderated associations between sense of purpose and depressive or anxiety symptoms. Sense of purpose was more strongly negatively associated with depressive and anxiety symptoms for those participants who reported no food insecurity. That said, sense of purpose remained negatively associated with psychological distress even among those reporting food insecurity. [ABSTRACT FROM AUTHOR]

Individuals with a purpose in life tend to experience better health outcomes, in part because they engage in healthier lifestyle behaviors. However, it is unclear whether these associations are due to the sense of purpose, or if the form of purpose may also correlate with health indicators. The current study examined this claim, with regard to activist purpose, or a commitment to engaging in social activism and causes, given that this type of purpose may be especially vulnerable to health risks. In a cross-sectional study of 307 US adults (mean age: 38.1 years), participants completed surveys regarding their activist purpose, sense of purpose, health, and health behaviors. In addition, we asked participants about their other purpose orientations: prosocial, occupational, personal recognition, and creative purposes in life. The results suggested consistent evidence of positive associations between a sense of purpose, self-rated health, and health behaviors. The activist purpose levels were positively associated with a higher health behavior engagement, but not with the indices of self-rated health. Other purpose orientations exhibited similarly weak-to-null associations with health. The findings are discussed with regard to whether activist purpose should be viewed as health-promoting, and what future research should be conducted to evaluate this claim. [ABSTRACT FROM AUTHOR]

Hope has been associated with better health and social well-being outcomes, including emotional adjustment, positive affect, life satisfaction, reduced risk of all-cause mortality, and increased physical activity, yet how hope as a construct impacts these health benefits in older adults is not very well-understood. This study examined: (1) the relationship between hope and health behaviors in older adults; (2) how this relationship may differ across different socio-demographic groups; and (3) how hope relates to perceived future selves among older adults. The study used cross-sectional data from 711 community-dwelling adults aged ≥55 years (280 men, 431 women). Survey measures included the Snyder Adult Dispositional Hope Scale (ADHS) and the Herth Hope Index (HHI), a health behaviors checklist, self-reported health, and a future self-scale. Data were analyzed using bivariate and multiple regressions. Hope was positively associated with healthy behaviors in older adults. Participants with higher levels of hope also reported more positive future selves and better health. The associations were similar across different racial/ethnic groups. This study fills an important gap in our understanding of hope and its association with health behaviors in community-dwelling older adults. These findings highlight a need to promote hope in older adults in order to enhance their sense of well-being. [ABSTRACT FROM AUTHOR]

Purposefulness may facilitate self‐regulation; however, little is known about the self‐regulatory strategies that are implemented by purposeful individuals. Given the multiple regulatory challenges students face in their social and academic lives, a central aim of the current work was to consider how purposefulness and self‐regulation are linked during the first semester of university. This 13‐week‐long study was conducted with first‐semester college students (N = 256) in the United States of America to examine whether weekly fluctuations in purposefulness may be connected to the use of traditionally adaptive (problem‐solving) and maladaptive (rumination and experiential avoidance) self‐regulation strategies. Consistent with our hypothesis, at the within‐ and between‐person level, higher purposefulness was associated with greater use of problem‐solving, lower rumination, and lower experiential avoidance at the weekly level. The findings imply purposefulness is an important individual difference that may explain better or worse self‐regulatory abilities. [ABSTRACT FROM AUTHOR]

Genetic risk for Late Onset Alzheimer Disease (AD) has been associated with lower cognition and smaller hippocampal volume in healthy young adults. However, whether these and other associations are present during childhood remains unclear. Using data from 5556 genomically-confirmed European ancestry youth who completed the baseline session of the ongoing the Adolescent Brain Cognitive DevelopmentSM Study (ABCD Study®), our phenome-wide association study estimating associations between four indices of genetic risk for late-onset AD (i.e., AD polygenic risk scores (PRS), APOE rs429358 genotype, AD PRS with the APOE region removed (ADPRS-APOE), and an interaction between ADPRS-APOE and APOE genotype) and 1687 psychosocial, behavioral, and neural phenotypes revealed no significant associations after correction for multiple testing (all ps > 0.0002; all pfdr > 0.07). These data suggest that AD genetic risk may not phenotypically manifest during middle-childhood or that effects are smaller than this sample is powered to detect. [ABSTRACT FROM AUTHOR]

Introduction: This 33‐year study examined associations between self‐control development in adolescence and forgivingness, i.e., the dispositional tendency to forgive others, in middle adulthood. Methods: Participants were 1350 adults aged 45 years (50.6% female). Self‐control was measured yearly from age 12 to 16, while forgivingness was measured at age 45. Results: Results indicated significant individual differences in level and change of self‐control across the adolescent years and an average mean‐level increase. Individual differences in level and change in self‐control were independently associated with forgivingness in middle adulthood. Individuals who either entered adolescence with higher self‐control, and/or increased in self‐control during the adolescent years, reported higher scores in forgivingness at age 45 compared to peers. This pattern held even after controlling for gender, socioeconomic status (SES), and conduct problems in adolescence. Conclusion: The current findings demonstrate that developmental processes in adolescence are important for individual differences in the dispositional tendency to forgive others in adulthood. [ABSTRACT FROM AUTHOR]

Objective. Pencil beam scanning (PBS) proton therapy target dose conformity can be improved with energy layer-specific collimation. One such collimator is the dynamic collimation system (DCS), which consists of four nickel trimmer blades that intercept the scanning beam as it approaches the lateral extent of the target. While the dosimetric benefits of the DCS have been demonstrated through computational treatment planning studies, there has yet to be experimental verification of these benefits for composite multi-energy layer fields. The objective of this work is to dosimetrically characterize and experimentally validate the delivery of dynamically collimated proton therapy with the DCS equipped to a clinical PBS system. Approach. Optimized single field, uniform dose treatment plans for 3 × 3 × 3 cm3 target volumes were generated using Monte Carlo dose calculations with depths ranging from 5 to 15 cm, trimmer-to-surface distances ranging from 5 to 18.15 cm, with and without a 4 cm thick polyethylene range shifter. Treatment plans were then delivered to a water phantom using a prototype DCS and an IBA dedicated nozzle system and measured with a Zebra multilayer ionization chamber, a MatriXX PT ionization chamber array, and Gafchromic™ EBT3 film. Main results. For measurements made within the SOBPs, average 2D gamma pass rates exceeded 98.5% for the MatriXX PT and 96.5% for film at the 2%/2 mm criterion across all measured uncollimated and collimated plans, respectively. For verification of the penumbra width reduction with collimation, film agreed with Monte Carlo with differences within 0.3 mm on average compared to 0.9 mm for the MatriXX PT. Significance. We have experimentally verified the delivery of DCS-collimated fields using a clinical PBS system and commonly available dosimeters and have also identified potential weaknesses for dosimeters subject to steep dose gradients. [ABSTRACT FROM AUTHOR]

The rapid recovery of meteorites mitigates the exposure of astromaterials to the terrestrial environment and subsequent contamination. Modern fireball observatories have enabled the more accurate triangulation of fireball trajectories, which has aided in the location of strewn fields, in the case of meteorite‐producing events. Despite this advancement, most meteorite searches still use manual searching to locate any meteorite falls, which is often labor‐intensive and has a slow coverage rate (km2 day−1). Recent work has begun exploring the application of drone technology to the recovery of meteorites; however, most of this work has focused on falls in arid environments. Our study examines the utilization of drones with thermal imaging technology to aid in the recovery of meteorites that have fallen on a snow‐covered field. We created a simulated strewn field that included meteorite specimens as well as Earth rocks with similar properties ("meteowrongs"). Thermal imagery was utilized to determine whether the thermal contrast between meteorites and snow could aid in the identification of meteorites. We found that the thermal contrast was significant enough that meteorites were readily identifiable within thermal images; however, it was not significant enough to distinguish between the meteorites and the meteowrongs. The utilization of thermal imagery in conjunction with visible imagery has the potential to aid in the rapid recovery of meteorites in snow‐covered landscapes. [ABSTRACT FROM AUTHOR]

Introduction: Cori Bush is a prominent modern activist in the U.S., becoming involved in activism following Michael Brown's death. Bush, like many activists before her, has set clear goals for social change, yet work is needed to understand why Bush (and like others) became an activist when others did not. One potential reason may be that these exemplars found purpose in life in activism. Thus, the current psychobiography explores the purpose in life of Cori Bush, a prominent activist and politician in the U.S., as well as what factors emerge for how Bush found her purpose in life. Method: The present research gathered public materials (e.g., speeches) from Bush and coded materials for the presence and depth of both themes of purpose and factors predicting purpose. Results: Activism was the most prominent theme of purpose for Bush, with some pro‐social purposes also occurring. Multiple personal factors emerged as influences on her activist purpose, including extraversion, psychological flexibility, and action‐oriented coping style. Additionally, the situational factors of discriminatory experiences and Michael Brown's death emerged as factors. Conclusion: These results suggest that Bush has an activist purpose in life and that she found this purpose through a combination of personal and situational factors. [ABSTRACT FROM AUTHOR]

Activism is responsible for many of the positive social changes we have seen across time, and is central to pushing for continued social change. However, these positive outcomes do not come without a cost, as activism can also be draining and can lead to physical and emotional harm for those involved. Social policies and intervention programs have addressed how to help people maintain their engagement with activism aims, though few have considered the motivational role of purpose in life. As purpose in life involves a sustained commitment to one's goals, having a purpose in life centered around activism may help an individual remain committed to activism and to the creation of change in the face of these obstacles. If activist purpose can help us understand and predict who is likely to remain engaged in activism, then it is valuable to consider what factors influence the development of activist purpose, in order to continue necessary social change. Thus, in this work we define activist purpose, and theorize as to what factors may be relevant to the development of an activist purpose by situating predictors of activism and collective action within the literature on pathways to purpose in life. This work may thus provide a greater understanding of how to encourage activism or reduce the harmful effects associated with activism. [ABSTRACT FROM AUTHOR]

Organic matter in astromaterials can provide important information for understanding the chemistry of our solar system and the prebiotic conditions of the early Earth. However, once astromaterials reach the Earth's surface, they can be readily contaminated through contact with the Earth's surface as well as during processing and curation. Here, we investigate how typical handling and curation materials interact with meteorite specimens by documenting hydrophobic organic compound contamination in the laboratory environment and on materials that might be used for their collection and storage. We use gas chromatography–mass spectrometry analysis of soluble organic compounds in dichloromethane extracts of these materials to gain insights into what materials and methods are best for the collection and curation of astromaterials. Our results have implications for how extraterrestrial samples—especially those containing significant intrinsic organic matter—are handled and curated to preserve them in their most pristine states. Following recommendations of other researchers in the area of returned sample curation, we advocate for a thorough investigation into the materials used in handling and curation of meteorites to create a contamination baseline to inform soluble organic analyses on astromaterials and enable the discrimination of terrestrial and extraterrestrial compounds. [ABSTRACT FROM AUTHOR]

Sense of purpose, or feeling that one has personally meaningful goals and directions guiding them through life, consistently predicts a variety of desirable well‐being, health, and social outcomes. However, work has been limited with respect to evaluating it as a predictor and promoter of romantic relationships or how purpose may develop in these contexts. For instance, healthy romantic relationships could also help individuals develop and maintain a higher sense of purpose. With cross‐sectional evidence finding positive associations between sense of purpose and romantic relationship commitment and satisfaction, the current study expanded on past work by using longitudinal data with three months between two measurement occasions (Time 1: N = 2243; Time 2: N = 1284) to evaluate whether sense of purpose predicted relationship status over time and how changes in relationship quality and sense of purpose were associated. Results showed that a greater sense of purpose predicted maintaining a romantic relationship but did not predict later romantic relationship quality, although higher romantic relationship quality predicted an increase in sense of purpose. Findings are discussed regarding why people with a higher sense of purpose may be more likely to stay in relationships as well as the role that positive romantic relationships may play in helping maintain a higher sense of purpose. [ABSTRACT FROM AUTHOR]

Studies show the importance of the personal experience of meaning in life for older adults, but adults with dementia have been largely excluded from this research. The current study examined the longitudinal predictive effect of meaning in life for the psychological and cognitive functioning of older adults with Alzheimer's disease and whether cognitive decline predicted presence of meaning in life. On three yearly measurement occasions, presence of meaning in life, depressive symptoms, life satisfaction, and cognitive functioning were assessed in structured interviews with a convenience sample of 140 older adults with Alzheimer's disease from nine nursing homes in Belgium. Cross-lagged panel and latent growth curve models were used to analyze the longitudinal relationships between the variables. Over the three measurement waves, participants with higher presence of meaning reported lower depressive symptoms one year later. Presence of meaning and life satisfaction predicted each other over time, but only between the first and second wave. The analyses showed no strong evidence for a longitudinal association between meaning in life and cognitive functioning in either direction. The findings emphasize the importance of the experience of meaning in life for the psychological functioning of older adults with Alzheimer's disease. The lack of evidence for associations between meaning and cognitive functioning questions the prevailing view that intact cognitive abilities are a necessity for experiencing meaning. More attention to the potential of meaning interventions for persons with dementia is warranted. [ABSTRACT FROM AUTHOR]

Objectives: Purposeful adults may experience greater cognitive resilience because sense of purpose may help buffer against the effects of depressive symptoms and loneliness. We also evaluated whether these associations differed by race. Design: This study uses a wave of self-report data from the SPAN study of psychosocial aging. Setting: Participants come from a representative sample of older adults in St. Louis. Participants: Participants (N = 595) ages range from 65 to 78 (M age = 71.46), with 18.3% of participants identifying as Black/African-American. Measures: Sense of purpose was assessed with the Life Engagement Test, depressive symptoms with the Beck Depression Inventory-II, loneliness with the UCLA Loneliness Scale, and subjective cognitive decline with the AD-8. Results: Correlational analyses supported predictions that sense of purpose was negatively related to subjective cognitive decline, whereas depressive symptoms and loneliness were positively related (| r |s >.30, p s <.001). For loneliness, but not depression, this association was moderated by sense of purpose (b = −0.43, p <.001). A relatively high sense of purpose attenuated associations between loneliness and subjective cognitive decline. A three-way race × purpose × loneliness interaction (b = −0.25, p =.021) revealed that the buffering effects of sense of purpose on subjective cognitive decline were stronger for Black adults. Discussion: This study provided partial support for the buffering hypothesis, showing that sense of purpose may help mitigate the cognitive decrements associated with loneliness. Future research needs to consider how purpose-promoting programs may support healthy cognitive aging, particularly among Black older adults and those who experience greater social isolation. [ABSTRACT FROM AUTHOR]

The current study examined the nature of gratitude and future time perspective (FTP) during the COVID-19 pandemic, focusing on the effects of age and virus worry on the associations between gratitude and remaining opportunities and time. Data came from a survey of a representative sample of Swiss adults (N = 1,008; 18–90 years) assessed during the pandemic in 2020. Local structural equation modeling (LSEM) was used to investigate the effects of continuous age and virus worry on mean-levels and correlations. While gratitude was unaffected by age and worry, the remaining opportunities and time factors of FTP decreased across age and levels of worry. The associations between gratitude and the FTP factors were invariant across age and levels of worry. Additionally, using previous cross-sectional data, the study found that associations between gratitude and future time perspective were significantly smaller during the pandemic as compared to an assessment in 2018. [ABSTRACT FROM AUTHOR]

Background: Given the gendering of engineering roles and competencies, the evidence that the skills required for engineering management are widely referred to as social, and the fact that men engineers are stereotyped as more technical, and women as more social, it might be theorized that (a) those that occupy managerial (vs. technical) roles in engineering are more socially oriented, and (b) that this will especially be the case for women. However, no research has empirically tested the relationship between having socially oriented characteristics and being in managerial roles within the engineering profession, nor have gender differences been examined. Purpose: We test whether social interests and communal goal strivings are linked to engineers' positioning in managerial roles and explore gender as a moderator of these relationships. Additionally, because enterprising interests and agentic goal strivings have been linked to managerial roles in other occupations, we test these as additional predictors of engineers' positioning in managerial roles. Method: In a field survey of 274 industry engineers from multiple organizations and subfields, we tested the relationships described using hierarchical linear regression analysis. Results: Enterprising interests and agentic goals, but not social interests and communal goals, were associated with being in managerial roles, and there were no gender differences in these relationships. Conclusions: Our findings challenge perceptions that managerial roles in engineering, and particularly women's positioning in these roles, are associated with socially oriented tendencies. Findings have implications for research on gender stereotyping and intraoccupational gender segregation in engineering and hold educational implications for curriculum, instruction, and advising. [ABSTRACT FROM AUTHOR]

Previous research has demonstrated that retirees tend to report lower levels for sense of purpose compared to working adults. However, it remains unclear whether adults show differences in the extent to which they expect to be purposeful during retirement, and what that may mean for the propensity to plan for retirement. The current study examined this question in a cross-sectional sample of 492 adults (Age: M = 39.28, SD = 8.35) prior to retirement. Participants completed an adapted measure to capture expected purposeful engagement during retirement, along with sense of purpose, retirement planning, and the Big Five personality traits. Factor analyses and zero-order correlations suggested that purposeful retirement perceptions are related yet distinct from sense of purpose in general, and adults on average expect a moderately purposeful retirement. Purposeful retirement scores were associated with multiple retirement planning scales, and remained predictive of retirement preparation even when accounting for the Big Five and demographic factors. Adults differ in how purposeful they expect to be during their future retirement. Moreover, these differences may be a valuable consideration when understanding how to promote retirement planning. [ABSTRACT FROM AUTHOR]

Objective: Sense of purpose has been associated with greater health and well-being, even in daily contexts. However, it is unclear whether effects would hold in daily life during COVID-19, when people may have difficulty seeing a path towards their life goals. Design: The current study investigated whether purposefulness predicted daily positive affect, negative affect, and physical symptoms. Participants (n = 831) reported on these variables during the first weeks of the COVID-19 response in North America. Main outcome measures: Participants completed daily surveys asking them for daily positive events, stressors, positive affect, negative affect, physical symptoms, and purposefulness. Results: Purposefulness at between- and within-person levels predicted less negative affect and physical symptoms, but more positive affect at the daily level. Between-person purposefulness interacted with positive events when predicting negative and positive affect, suggesting that purposeful people may be less reactive to positive events. However, between-person purposefulness also interacted with daily stressors, insofar that stressors predicted greater declines in positive affect for purposeful people. Conclusion: Being a purposeful person holds positive implications for daily health and well-being, even during the pandemic context. However, purposefulness may hold some consequences unique to the COVID-19 context, which merit attention in future research. [ABSTRACT FROM AUTHOR]

While sense of purpose is a robust predictor of well-being, little work has considered whether the associations vary based on future time perspective. Exploring this possibility is important given that the extent to which one may pursue their life aims could be dependent upon how much time they feel that they have remaining. Using three samples (total n = 2333), the current study considered the association between sense of purpose and future time perspective. Moderation tests also examined whether the associations between sense of purpose and three well-being components (positive affect, negative affect, life satisfaction) differed as a function of future time perspective. Across all three studies, people with a broader time perspective reported a higher sense of purpose. Both constructs predicted greater well-being, even after accounting for chronological age. Future time perspective moderated the associations between sense of purpose and well-being, such that the negative association between sense of purpose and negative affect was stronger for those with a broader time perspective and the positive association between sense of purpose and life satisfaction was stronger for those with a limited time perspective. The well-being benefits associated with sense of purpose in adulthood may depend on future time perspective. Findings are discussed in the context of how purpose can be harnessed to enhance well-being even when older adults feel that their time left is limited. [ABSTRACT FROM AUTHOR]

Despite the growing use of retirement communities and ageing care facilities, little is known about how residing in retirement residences may impact aspects of older adult wellbeing. Living in these communities may hold particular influence on residents' sense of purpose, if they feel limited in their opportunities for individual action, or could serve to promote purposefulness depending on the social connections available. The current study sought to explore contributing factors as well as barriers to purpose in older adults living in three continuing care retirement communities. Using brief semi-structured interviews, 18 older adults were asked to describe their purpose in life, community-related activities and any perceived challenges limiting their ability to pursue this purpose. Thematic analysis was used to examine themes common across interviews. Interviews presented a mixed picture of the nature of purposefulness in retirement facilities. Residents espoused several benefits of community living such as social and leisure opportunities, while also noting several obstacles to their purpose, including health concerns and the belief that purpose in life was not relevant for older adults. These findings provide insight into how older adults can derive a sense of purpose from activities within their retirement community and how facilities can better tailor programmes to promote purposefulness and support personally valued roles for residents. [ABSTRACT FROM AUTHOR]

Semitransparent perovskite solar cells (STPSCs) continue to attract enormous interest because of their potential to provide low-cost renewable energy for building and automotive applications. Whilst many studies have shown that small molecule additives can improve STPSC properties, here we use relatively colossal poly(N-isopropylacrylamide) microgel particles (MGs) as polymer colloid sponge-like additives for the first time. Uniquely, these MGs have an inherent tendency to form highly ordered 2D non-closepacked particle arrays when deposited. Remarkably, this morphology is transcribed to the perovskite layer in the form of 2D non-close-packed nanopore arrays. The nanopores contain shunt-blocking MGs. The perovskite/MG-based STPSCs devices achieve a champion power conversion efficiency (PCE) of 11.64% for a device average visible transmittance (AVT) of 25.3%. The average light utilization efficiency (LUE) for the optimum system is 2.60% which is much higher than that for the MG-free control system and is larger than the 2.50% threshold that is required, in principle, for application. The MGs bind to the Pb2+ ions and passivate the perovskite film. Finite difference time domain (FDTD) simulation data show that the MGs increase the AVTs of the films compared to uniform MG-free films. The MGs are proposed to act as nanoscale optical windows. Our new approach to preparing STPSCs delivers perovskite films containing 2D nanopore arrays in a single step that provide improved PCEs and AVTs and may accelerate future STPSC applications. [ABSTRACT FROM AUTHOR]

Research has demonstrated the importance of sleep quality for university students, although work is limited with respect to how sleep during the first semester of school impacts well-being and academic outcomes. The current study sought to examine the role of sleep quantity and variability over the first semester of university on GPA and happiness. Students (n = 97) from a first-semester psychology course completed weekly assessments of sleep and well-being (happiness and anxiety) for 15 weeks, and they gave permission for researchers to collect their GPA and SAT data from the registrar. Average weekly sleep quantity was associated with greater weekly happiness and less anxiety. Weekly sleep variability was associated with lower happiness and more anxiety. Even when accounting for sleep quantity and initial start-of-semester measures, sleep variability predicted worse GPA and happiness for students at the end-of-semester. In summary, sleep consistency may be an important target for health professionals working within the university setting. This study contributes to the literature on the importance not only of sleep but also of sleep consistency, during a major life transition. [ABSTRACT FROM AUTHOR]

Purpose: The radiobiological benefits afforded by spatially fractionated (GRID) radiation therapy pairs well with the dosimetric advantages of proton therapy. Inspired by the emergence of energy‐layer specific collimators in pencil beam scanning (PBS), this work investigates how the spot spacing and collimation can be optimized to maximize the therapeutic gains of a GRID treatment while demonstrating the integration of a dynamic collimation system (DCS) within a commercial beamline to deliver GRID treatments and experimentally benchmark Monte Carlo calculation methods. Methods: GRID profiles were experimentally benchmarked using a clinical DCS prototype that was mounted to the nozzle of the IBA‐dedicated nozzle system. Integral depth dose (IDD) curves and lateral profiles were measured for uncollimated and GRID‐collimated beamlets. A library of collimated GRID dose distributions were simulated by placing beamlets within a specified uniform grid and weighting the beamlets to achieve a volume‐averaged tumor cell survival equivalent to an open field delivery. The healthy tissue sparing afforded by the GRID distribution was then estimated across a range of spot spacings and collimation widths, which were later optimized based on the radiosensitivity of the tumor cell line and the nominal spot size of the PBS system. This was accomplished by using validated models of the IBA universal and dedicated nozzles. Results: Excellent agreement was observed between the measured and simulated profiles. The IDDs matched above 98.7% when analyzed using a 1%/1‐mm gamma criterion with some minor deviation observed near the Bragg peak for higher beamlet energies. Lateral profile distributions predicted using Monte Carlo methods agreed well with the measured profiles; a gamma passing rate of 95% or higher was observed for all in‐depth profiles examined using a 3%/2‐mm criteria. Additional collimation was shown to improve PBS GRID treatments by sharpening the lateral penumbra of the beamlets but creates a trade‐off between enhancing the valley‐to‐peak ratio of the GRID delivery and the dose‐volume effect. The optimal collimation width and spot spacing changed as a function of the tumor cell radiosensitivity, dose, and spot size. In general, a spot spacing below 2.0 cm with a collimation less than 1.0 cm provided a superior dose distribution among the specific cases studied. Conclusions: The ability to customize a GRID dose distribution using different collimation sizes and spot spacings is a useful advantage, especially to maximize the overall therapeutic benefit. In this regard, the capabilities of the DCS, and perhaps alternative dynamic collimators, can be used to enhance GRID treatments. Physical dose models calculated using Monte Carlo methods were experimentally benchmarked in water and were found to accurately predict the respective dose distributions of uncollimated and DCS‐collimated GRID profiles. [ABSTRACT FROM AUTHOR]

Studying organic compounds in meteorites provides important insight into the chemical processes that occurred in the early solar system. Once meteorites reach the Earth's surface, they are subject to terrestrial organic contamination that may confound the conclusions that we draw from meteorite organic analyses. Within this study, specimens of the Tarda C2 ungrouped carbonaceous chondrite, collected within a few days of its fall on August 25, 2020, from a barren desert in Morocco, were analyzed for their organic compound contents. In addition, a sand sample from the strewn field was analyzed to confirm the sources of a handful of contaminating compounds detected in the Tarda stones. Using dichloromethane (DCM) rinses of the Tarda stone exteriors and DCM and hot water extractions of meteorite specimen powders and sand sample, and analysis of the soluble organics by gas chromatography‐mass spectrometry, we distinguish between extraterrestrial and contaminant sources for each organic compound. In this study, N‐tert‐butyldimethylsilyl‐N‐methyltrifluoroacetamide (MTBSTFA) was used to derivatize the hot water extractions to utilize its single‐step derivatization reaction ability. The compounds determined to be intrinsic to Tarda include propanoic acid, propanedioic acid, butanedioic acid, fumaric acid, methylmaleic acid, threonine, proline, glycine, urea, and cyclic octaatomic sulfur. We detected numerous terrestrial organic compounds, all of which were traced back to the meteorites' collection area, with several being confirmed in the sand sample. Our results have implications for best practices for the collection of freshly fallen meteorites, especially carbonaceous chondrites, as well as how specimens should be handled and curated after collection. [ABSTRACT FROM AUTHOR]

Soluble organic matter analyses of astromaterials can provide valuable information on the chemistry of our solar system and the processes that occur within it. The surface of the Earth, however, is a significant source of organic compounds due to the presence of life; this environment represents a major source of potential contamination for recently fallen meteorites. Here, we analyze select stones of the CM2 Aguas Zarcas carbonaceous chondrite, which fell on April 23, 2019, in Aguas Zarcas, San Carlos county, Alajuela province, Costa Rica, with the goal of determining the complement of intrinsic and contaminant soluble organic matter. The specimens were collected pre‐ and post‐rainfall, days to weeks after the stones fell on the Earth. Through gas chromatography‐mass spectrometry analysis of soluble organic matter in dichloromethane and hot water extracts of meteorite powders, we differentiate between extraterrestrial and contaminant sources for each organic compound detected. In this study, N‐tert‐butyldimethylsilyl‐ N‐methyltrifluoroacetamide (MTBSTFA) was used to derivatize the hot water extracts to test out its "one‐pot" extraction capabilities. The majority of the detectable organic compounds are contaminants and can be explained as being sourced from the terrestrial surface onto which the meteorite fell. Our results have implications for how environmental factors, such as land use and rainfall events in this case, can impact the intrinsic organics in carbonaceous chondrites. [ABSTRACT FROM AUTHOR]

Background: Sense of purpose, or the extent to which one perceives their lives to have meaningful goals and directions, may aid in initiating satisfying and stable new connections while positively maintaining old ones for college students. Purpose: The current study sought to evaluate how a college students' sense of purpose during their first week of college may predict their satisfaction with different relationship types throughout their first semester of university. Research Design: At the beginning of the semester, students reported their sense of purpose, and every week of the semester they reported their weekly relationship satisfaction across a variety of domains (i.e., parents, home friends, university friends, roommates, resident assistants, and significant others). Study Sample: The current study followed-up first year college students (n = 364) from a private Midwestern university who all participated in the same Psychology of Young Adulthood class. Data Analysis: Multilevel models were conducted to evaluate mean-level relationship satisfaction trajectories throughout the first semester and whether sense of purpose predicted those trajectories when accounting for gender and the Big Five personality traits. Results: Friendships with home friends and university friends as well as parental relationships increased in satisfaction during the first semester, while relationships with roommates and resident assistants decreased. Furthermore, a higher sense of purpose was associated with greater relationship satisfaction with university friends and parents, even when accounting for the Big Five personality traits, as well as greater relationship satisfaction stability. Conclusions: Findings paint a nuanced and equivocal nature of relationships during the first semester, and point to the need to better understand how and when sense of purpose does or does not yield positive relationships over time. [ABSTRACT FROM AUTHOR]