Patterns of pollinator turnover and increasing diversity associated with urban habitats

The role of urban expansion on bee diversity is poorly understood, but it may play an important role in restructuring pollinator diversity observed in rural regions at the urban perimeter. We studied bee communities in two habitats essential for pollinators (residential gardens and semi-natural areas) at 42 sites situated at the edge of greater Montreal, Canada. Bee species richness, abundance and functional diversity all increased with urbanization in both habitat types, but gardens and semi-natural areas supported distinct bee communities with unique responses to urbanization in terms of species turnover. Compared to semi-natural sites, residential gardens supported bees that foraged from a greater number but a lower proportion of available plant species. Bees did not discriminate between exotic and indigenous plant species in either gardens or semi-natural sites and were attracted to flowers in either habitat irrespective of their origins. Protecting semi-natural ruderal areas and providing residential garden habitats for pollinators are both effective means of promoting regional bee diversity in urbanizing regions.     

Sampling procedures and survey methodologies for the 1996 survey with comparisons to earlier national roadside surveys.

This article describes the multistage sampling system employed in the 1996 national roadside survey and compares it to the sampling methods employed in the two prior surveys in 1973 and 1986. Also described are the data collection procedures at the selected sites, the breath-test devices used to collect blood alcohol concentration (BAC) data, and the methods used to impute BAC values where breath-test measures were not obtained. Overall, almost twice as many (6,298 in 1996 compared to 3,698 in 1973 and 3,043 in 1986) drivers were interviewed in the most recent national survey as in the previous efforts. The procedures implemented in the three surveys are sufficiently similar to permit comparison of these surveys conducted at 10-year intervals.     

High and low levels of adolescent peer status are associated longitudinally with socioevaluative concern

This study examined linear and curvilinear longitudinal associations between peer status (i.e., likeability and popularity) and socioevaluative concern, a socio-cognitive feature characterized by attunement to judgment from peers. A sample of 716 adolescents (M_age = 16.01, SD = 1.25; 54% female; 46.5% White; 69.5% reduced-price lunch) was assessed twice annually. Likeability and popularity were assessed with peer nominations at Time 1. Measures of general (rejection sensitivity, peer importance) and online (digital status seeking, online status importance) socioevaluative concern were obtained at Times 1 and 2. High and low levels of likeability were longitudinally associated with increased peer importance, while high and low levels of popularity were associated with increased digital status seeking, and decreased online status importance for girls.     

Impulsivity and predictive control are associated with suboptimal action-selection and action-value learning in regular gamblers

Heightened impulsivity and cognitive biases are risk factors for gambling problems. However, little is known about precisely how these factors increase the risks of gambling-related harm in vulnerable individuals. Here, we modelled the behaviour of 87 community-recruited regular, but not clinically problematic, gamblers during a binary-choice reinforcement-learning game, to characterize the relationships between impulsivity, cognitive biases and the capacity to make optimal action selections and learn about action-values. Impulsive gamblers showed diminished use of an optimal (Bayesian-derived) probability estimate when selecting between candidate actions, and showed slower learning rates and enhanced non-linear probability weighting while learning action values. Critically, gamblers who believed that it is possible to predict winning outcomes (as ‘predictive control’) failed to use the game's reinforcement history to guide their action selections. Extensive evidence attests to the ease with which gamblers can erroneously perceive structure in the reinforcement history of games when there is none. Our findings demonstrate that the generic and specific risk factors of impulsivity and cognitive biases can interfere with the capacity of some gamblers to utilize structure when it is available in the reinforcement history of games, potentially increasing their risks of sustaining gambling-related harms.     

The effectiveness of using two different types of anti-vibration gloves compared to bare hand condition at dampening the frequencies associated with hand-arm vibration syndrome

The ability of a foam-padded and air-bladder glove to significantly attenuate hand-arm vibration compared to an individual's bare hands (after the effect of adipose content of the distal upper extremity had been removed) was studied. Subjects consisted of 3 male and 8 female university students' aged 20 to 22 years. After the effect of adipose content of the distal upper extremity was removed, the effect of the gloves on transmissibility was significant with F2,959 = 5.27, p<0.000. The effect of the frequencies was significant with F31,959 = 8.80, p<0.000. There was no significant interaction between the gloves and frequencies on transmissibility with F62,959 = 0.22, p = 1.000. Post-hoc analysis revealed that there was a significant difference was between bare hand and foam-padded glove conditions, F1,1052 = 8.13, p = 0.004, where foam-padded gloves had significantly greater transmissibility. Post-hoc analysis of the frequencies indicated that there were significant differences between frequencies at with the highest transmissibility occurring at 100 Hz.     

Species richness,phylogenetic and functional structure of bird communities in Chinese university campuses are associated with divergent variables

University campus is an important component of urban landscapes for biodiversity conservation. However, to our knowledge no study has quantitatively assessed the diversity and structure of bird communities in Chinese university campuses, especially from phylogenetic and functional perspectives. Here, for the first time we linked species richness, phylogenetic structure and body mass structure of campus bird communities with contemporary climate, glacial-interglacial climate change, altitudinal range, population density around campus, area and age of campus to test their associations. We found 393 bird species in 38 university campuses (29% of all Chinese bird species, two species are endangered, four species are vulnerable, and 33 species are near threatened). The variables significantly correlated with campus bird species richness, phylogenetic structure and body mass structure were altitudinal range and mean annual precipitation, glacial-interglacial anomaly in temperature, and altitudinal range, respectively. In particular, there were more species in steeper and wetter campuses, more young species clustered in campuses with stable glacial-interglacial climate, and more species with smaller body size in steeper campuses. Our study highlights the importance of considering both phylogenetic and functional information for biodiversity conservation in urban ecosystems.     

Population growth and rural-urban migration,with special reference to Ghana

While the population of Ghana is expected to double in 25 years at the current rate of increase (approximately 2.5% per annum), the population of urban centers is increasing even faster. The 1970 census shows the urban population growing by 4.8% per annum. This is mainly the result of rural to urban migration and, to a smaller extent, the increase in the number of urban centers from 39 in 1948 to 98 in 1960 to 135 in 1970. In the 1970 census only 57.1% of the population were enumerated in their locality of birth and only 20.9% in a locality other than their place of birth but in the same region. 4.1% were born outside Ghana, mostly in another West African country. 1 striking difference between urban and rural areas is the differing sex ratio of the working population. In rural areas there are 91.0 males aged 15-64 years for every 100 females while in urban areas there are 107.1. Most migration in Africa is for employment and those most likely to migrate are working-age males. Because secondary schools are scarce in rural areas, urban dwellers generally have a higher education level. There are no significant differences between overall labor force participation rates for females. The nationwide participation rate was 38.9% for both males and females (males 43.8%, females 34.1%); in urban areas the total was 40.0% (males 46.3%, females 33.7%) and in rural areas 38.5% (males 42.7%, females 34.3%). Ghanaian women have traditionally occupied a prominent place in the labor force. The theory that urban migration is due to urban-rural income disparities is not confirmed by figures. Considering the high amount of unemployment in urban areas, a rural dweller can average as much as a city dweller. In fact, poorly educated migrants are the ones most affected by urban unemployment. A recent study by Kodwo Ewusi considered the impact of many variables on migration; he found depressed social conditions at the place of origin are more compelling motivations than economic factors but that once people decide to migrate, they base their choice of destination primarily on economic opportunities available at that end. Distance bears little relationship to choice of destination. To stem this tide efforts need to be made to increase rural income, provide employment opportunities for those displaced as agriculture becomes more efficient, and to provide for greater amenities in rural areas. Urban unemployment is an ever-increasing problem, accentuated by population growth and migration. Intensive rural development is needed to reverse this trend.     

产业发展与城市土地利用关系研究——利用有约束条件的似乎不相关回归模型分析

城市经济发展需要建筑空间作支撑,不同的经济活动有不同的建筑空间要求,而不同土地利用类型有不同的建筑容积率,因此为城市经济发展供给城市土地就比较复杂。产业与城市土地之间数量关系是实现经济规划与城市规划融合、经济规划空间落地的一个重要技术关键。本文利用有约束的似乎不相关模型分析经济产业与城市土地之间的关系,通过北京实证估算,该方法推算的结果比较符合实际。我们认为该方法可以广泛地应用到其它城市,在直接数据缺失的情况下,这个非调查方法的实用价值不可低估。     

Physical activity is associated with better health and psychological well-being during transition to university life

The authors investigated vigorous physical activity, psychological well-being, and self-reported illness during transition to first-year university life in a sample of 175 Canadian undergraduates. At the completion of their first year of university study, participants completed retrospective measures assessing vigorous physical activity, upper respiratory infectious illness (URI), doctor visits, as well as measures of psychological well-being. Based on nationally recommended (US Department of Health and Human Services) standards, 61% of students reported engaging in adequate levels of vigorous activity during their first year at university. The authors found no differences in URIs between sufficiently and insufficiently active students. However, insufficiently active students scored lower on psychological well-being and were twice as likely to have consulted a physician regarding an illness compared with sufficiently active students.     

Who are in charge,who do i work with,and who are my friends: A latent space approach to understanding elite coappearances in China

How ruling elite arrange and maintain their power-sharing is key to our understanding of authoritarian politics. We analyze the dynamics of elite power-sharing in authoritarian regimes using a network framework that embeds actors onto a low-dimensional space. We also introduce a novel dataset tracking appearances of elite Chinese Community Party (CCP) members at political events. Our framework and data allow us to disentangle three key aspects of CCP elite power-sharing: (1) who are in charge, (2) who do I work with, and (3) who are my friends. Using a latent factor network analysis of approximately 10,000 appearance records of over 200 top CCP elites from 2013 to 2017, we empirically assess these three questions by computing elites’ total appearances, dyadic coappearances, and their distance in a latent social space. We test how well these three indicators fare at predicting elites’ appointments to the leading small groups (LSGs) of the CCP Central Committee and the Central Government, and from that analysis are able to highlight the need to account for the indirect ties elites share.     

Factors associated with the motivation to use psychoactive substances and the motivation to change in adolescents in an authoritarian context

The use of psychoactive substances (alcohol and drugs) by young people placed in rehabilitation centers in Quebec is well documented, but their motivation to use and to change substance use behavior remains unknown. There has been very little research on the details of the change process in adolescents, and even less in adolescents under supervision in rehabilitation centers.The present study aimed to identify the factors that youth associate with their motivation to use psychoactive substances and the factors that they associate with their motivation to change. Twenty-seven young males (age 14–18 years) were interviewed in the Centre jeunesse de Montreal. The majority of the participants were able to identify motivations to use and to change their substance use behavior. The motivations to use differed depending on the type of substance and the surrounding context in which drug use occurs. The motivations to change were associated with substance-related problems and with the perceived effect of external factors (e.g. constraints) on substance use. Finally, neither the motivations to use nor the motivations to change were strongly associated with the closely supervised setting in which the youth found themselves. Thus the controlled environment of the Centre jeunesse appears to have facilitated the change process for some participants and had no impact on others. The implications of these results for substance-abuse interventions involving troubled youth are discussed.     

Psychological growth in humanitarian aid personnel: reintegrating with family and community following exposure to war and genocide

There is a paucity of research into the subjective experiences of humanitarian aid personnel exposed to modern global conflicts and disasters in the course of their work. In particular, little is known about how they make sense of any dual threat: (1) witnessing catastrophic and traumatic events perpetrated on those they seek to serve and (2) experiencing personal threat to self. This phenomenological study explores the idiographic interpretation of aid personnel working in complex humanitarian settings including exposure to genocide, and the impact of such exposure on reintegration processes postmission. Semi-structured interviews were conducted, and data were analyzed using interpretative phenomenological analysis (IPA). One theme: Complex humanitarian distress and growth overarched five subordinate themes. Four of the subordinate themes highlighted long term psychological distress including shame, moral doubt, betrayal, and narcissistic coping. The fifth theme, Reparation with ‘self’, describes a redefining of self-worth and altruistic identity over time despite earlier perceived moral failure and sense of rejection from organization and important others. Reparation with self, as a positive outcome from traumatic distress and lack of validating support from important others, is discussed in light of current posttraumatic growth literature. Implications for therapists and recruiting organizations are also discussed.     

Assessment of an e-training tool for college students to improve accuracy and reduce effort associated with reading nutrition labels

Objective: Nutrition labels are often underutilized due to the time and effort required to read them. We investigated the impact of label-reading training on effort, as well as accuracy and motivation. Participants: Eighty college students (21 men and 59 women). Methods: The training consisted of a background tutorial on nutrition followed by three blocks of practice reading labels to decide which of two foods was the relatively better choice. Label-reading effort was assessed using an eye tracker and motivation was assessed using a 6-item scale of healthy food-choice empowerment. Results: Students showed increases in label-reading accuracy, decreases in label-reading effort, and increases in empowerment. Conclusions: The nutrition label e-training tool presented here, whether used alone or as part of other wellness and health programs, may be an effective way to boost students’ label-reading skills and healthy food choices, before they settle into grocery shopping habits.     

Factors associated with college students’ willingness and readiness to act in a food allergic emergency (WilRAFAE)

Abstract

Objective: Food allergies are on the rise in the U.S. Factors associated with willingness and readiness to act in a food allergic emergency on a college campus are currently unknown. Participants: College students in one Catholic college enrolled during spring of 2017. Methods: A previously piloted survey was distributed by e-mail. Results: Four hundred seventy-four individuals responded. All readiness components correlated, and all willingness components correlated with each other. Age, having children, college major had statistically significant correlations with readiness and willingness to act. Readiness was highly predictive of willingness to act in an FAE. Thirty-five percent of variability in willingness to act was explained by age, being health professions students, desire to be trained, social desirability, and readiness. Students in nonhealth related majors expressed high willingness, but low readiness. Conclusion: A pool of willing, trained to act individuals should be considered on college campuses including availability of unassigned epinephrine auto-injector.     

Prevalence of low testosterone and its relationship to body mass index in older men with lower urinary tract symptoms associated with benign prostatic hyperplasia

Abstract

Purpose: We examined the prevalence of low testosterone (LT) and its relationship with body mass index (BMI) in men with lower urinary tract symptoms (LUTS) associated with benign prostatic hyperplasia (BPH), who were enrolled in a clinical trial of drug therapy, the Medical Therapy of Prostatic Symptoms (MTOPS) Study.

Materials and methods: MTOPS enrolled 3047 men, and of these, 1896 had total testosterone (TT) measured at baseline. LT was defined as a single measurement of TT of <300?ng/dL.

Results: The overall prevalence of LT was 25.7%. Prevalence increased with increasing BMI; 14.7% among men who were normal weight (BMI <25?kg/m²) and 24.2% and 39.3% among overweight (BMI 25 to <30?kg/m²), and obese (baseline BMI ≥30?kg/m²) men, respectively.

Conclusions: LT was observed in about one in four MTOPS study participants with baseline TT measurements. The prevalence of LT increased markedly with increasing BMI. Our findings suggest a high prevalence of LT in obese men with LUTS/BPH. Physicians should be alert to the possibility of symptoms of hypogonadism in this population.     

Effectiveness of an educational intervention to increase knowledge and reduce use of risky behaviors associated with cumulative trauma in office workers

OBJECTIVE: This pilot project assessed the effectiveness of an intervention to increase knowledge and reduce risky behaviors related to cumulative trauma disorders (CTD) in office workers. STUDY DESIGN: All 124 employees from the administrative offices of a health maintenance organization were invited to participate. Subjects were followed across time using an identification number. Data were collected via questionnaire in June 1994 (pretest1) (N=84), August 1994 (pretest II) (N= 63) and September 1995 (posttest) (N=40). The yearlong intervention focused on functional activities to prevent CTD. RESULTS: of chi-square analyses for the 40 subjects who completed all surveys indicated this intervention significantly increased overall knowledge of CTD (p =.002). Significant changes in self-reported hand/wrist (p =.016) and neck/shoulder (p =.003) posture were also found. CONCLUSIONS: This study is a first step in identifying effective educational interventions to increase knowledge and reduce risk factors related to CTD in office workers.     

Youth characteristics associated with behavioral and mental health problems during the transition to residential treatment centers: the Odyssey Project population

This study aimed to determine what youth characteristics were associated with emotional and behavioral problems exhibited within the first three months of placement in residential treatment centers (RTCs) in a sample of youth from 20 agencies in 13 states. Two primary research questions were addressed: 1) What characteristics were associated with behavior during the transition to care? 2) Were the characteristics associated with behavior during the transition the same for boys and girls? Data were drawn from the Time 1 phase of the longitudinal national Odyssey Project dataset developed by the Child Welfare League of America. Measures included an extensive child and family characteristics (CFC) form and the Achenbach Child Behavior Checklist (CBCL). The results revealed significant gender-specific patterns of associations between youth characteristics and behavior exhibited during the transition to RTC placement. Notably, a sexual abuse history was associated with Externalizing for girls and Internalizing for boys and entering on psychotropic medication was associated with Internalizing for girls and boys and Externalizing for boys only. Results suggest many avenues for refining practice.