Curious sex ratios and cytoplasmic genes

Evolutionary theory predicts that most populations should consist of roughly as many males as females. Recently, a variety of populations have been described which show very different proportions of the two sexes, especially in invertebrate species that contain individuals whose offspring are almost all female. Some of these instances can now be explained by the diverse actions of various ‘selfish’ elements residing in the cytoplasm of the individuals, which are transmitted exclusively through the female line. These instances of curious sex ratios exemplify an important principle: the fitness of genes, rather than of individuals, is the primary currency of evolution.     

Effect of gear ratio on peak power and time to peak power in BMX cyclists

The aim of this study was to ascertain if gear ratio selection would have an effect on peak power and time to peak power production in elite Bicycle Motocross (BMX) cyclists. Eight male elite BMX riders volunteered for the study. Each rider performed three, 10-s maximal sprints on an Olympic standard indoor BMX track. The riders’ bicycles were fitted with a portable SRM power meter. Each rider performed the three sprints using gear ratios of 41/16, 43/16 and 45/16 tooth. The results from the 41/16 and 45/16 gear ratios were compared to the current standard 43/16 gear ratio. Statistically, significant differences were found between the gear ratios for peak power (F(2,14)?=?6.448; p?=?.010) and peak torque (F(2,14)?=?4.777; p?=?.026), but no significant difference was found for time to peak power (F(2,14)?=?0.200; p?=?.821). When comparing gear ratios, the results showed a 45/16 gear ratio elicited the highest peak power,1658?±?221?W, compared to 1436?±?129?W and 1380?±?56?W, for the 43/16 and 41/16 ratios, respectively. The time to peak power showed a 41/16 tooth gear ratio attained peak power in ?0.01?s and a 45/16 in 0.22?s compared to the 43/16. The findings of this study suggest that gear ratio choice has a significant effect on peak power production, though time to peak power output is not significantly affected. Therefore, selecting a higher gear ratio results in riders attaining higher power outputs without reducing their start time.     

Framing Refuge: Media,Framing, and Sanctuary Cities

The refugee sanctuary movement in the United States has shifted to include undocumented immigrants fleeing violence and economic strife. Given the negative tenor of coverage of undocumented immigration, and ties between framing and policy views on immigration, how the media frames sanctuary cities is likely to impact public perceptions of these cities and their policies. To assess media coverage of sanctuary policies, we analyzed articles from five national newspapers from 1980 to 2017 with both human content analysis and dictionary-based computational analysis. We find that framing around religion/morality and conflict has decreased, while stories focusing on crime and partisanship have increased. We discuss implications for public opinion and the likelihood that the American public will take their cues from media framing and elite discourse when it comes to sanctuary policies.     

How Are Curiosity and Interest Different? Naïve Bayes Classification of People’s Beliefs

Educational Psychology Review - Researchers studying curiosity and interest note a lack of consensus in whether and how these important motivations for learning are distinct. Empirical attempts to...     

The Implementation of Character Education and Children’s Literature to Teach Bullying Characteristics and Prevention Strategies to Preschool Children: An Action Research Project

Bullying behaviors among young children are taking place in preschool classrooms and child-development centers. The author makes a case, based on bullying themes in children’s literature and both qualitative and quantitative data collection with young children, for the use of children’s picture books to teach character as bullying prevention to 4–6 year old children. Through the reading of picture books and character education activities with a bullying theme preschool children develop a better understanding of bullying characteristics and strategies for dealing with bullying behaviors. Included are the results from questionnaires and interviews with preschool children and an annotated bibliography of children’s picture books and activities useful in the instruction and prevention of bullying behaviors.     

COMMUNITY COLLEGE TENURE: TEACH OR RESEARCH?

How responsible community colleges can help determine the degree to which they are serving the educational needs of minorities is the focus of this paper. The authors illustrate the importance of using US Census data and enrollment characteristics to assess how well colleges are serving the needs of all their constituencies. An example of how these data have been used for community colleges in one state is presented. The methodology discussed is seen as effective, however, only when such an assessment is used as the foundation upon which a complete package of services is provided to meet the needs of all students     

Political Socialization of International Students: Public-Issue Discourse and Discussion on the College Campus

ABSTRACT

This study examined international students’ interests in public issues in the U.S. and motivational factors behind their discourse or avoidance of such issues. In-depth interviews with international students revealed that they discuss certain public issues in the U.S. to gain or exchange information and knowledge, because these issues are relevant to themselves and others, or due to the misconceptions that others have about their country. Moreover, international students tend to avoid certain public issues because of the level of their knowledge and lack of interest in such issues and in order to avoid dissonance caused by the public issues.