Adaptive Synaptogenesis Constructs Neural Codes That Benefit Discrimination

Intelligent organisms face a variety of tasks requiring the acquisition of expertise within a specific domain, including the ability to discriminate between a large number of similar patterns. From an energy-efficiency perspective, effective discrimination requires a prudent allocation of neural resources with more frequent patterns and their variants being represented with greater precision. In this work, we demonstrate a biologically plausible means of constructing a single-layer neural network that adaptively (i.e., without supervision) meets this criterion. Specifically, the adaptive algorithm includes synaptogenesis, synaptic shedding, and bi-directional synaptic weight modification to produce a network with outputs (i.e. neural codes) that represent input patterns proportional to the frequency of related patterns. In addition to pattern frequency, the correlational structure of the input environment also affects allocation of neural resources. The combined synaptic modification mechanisms provide an explanation of neuron allocation in the case of self-taught experts.     

Scientists Popularizing Science: Characteristics and Impact of TED Talk Presenters

The TED (Technology, Entertainment, Design) conference and associated website of recorded conference presentations (TED Talks) is a highly successful disseminator of science-related videos, claiming over a billion online views. Although hundreds of scientists have presented at TED, little information is available regarding the presenters, their academic credentials, and the impact of TED Talks on the general population. This article uses bibliometric and webometric techniques to gather data on the characteristics of TED presenters and videos and analyze the relationship between these characteristics and the subsequent impact of the videos. The results show that the presenters were predominately male and non-academics. Male-authored videos were more popular and more liked when viewed on YouTube. Videos by academic presenters were more commented on than videos by others and were more liked on YouTube, although there was little difference in how frequently they were viewed. The majority of academic presenters were senior faculty, males, from United States-based institutions, were visible online, and were cited more frequently than average for their field. However, giving a TED presentation appeared to have no impact on the number of citations subsequently received by an academic, suggesting that although TED popularizes research, it may not promote the work of scientists within the academic community.     

Emergency Health Services Informational and Educational Programs: Development and Present Status

The development and present status of the Emergency Health Services (EHS) national and educational programs are discussed. Instituted in 1951 for medical and dental practitioners at a military school at Camp Borden, professional civilian indoctrination was later assumed by EHS at Canadian Emergency Measures College (CEMC). The federally sponsored courses there are now specialized; provincial EHS authorities undertake general indoctrination. Courses for graduates in pharmacy and nursing are also offered at CEMC. Hospital Disaster Institutes have been held across the country since 1954; Public Health Disaster Institutes, since 1966. Schools of Hygiene include the subject in graduate programs. Some years ago, three medical faculties introduced undergraduate teaching in mass casualty care; now, encouraged by the Association of Canadian Medical Colleges, a larger number are doing so. Several faculties of Dentistry, all faculties of Pharmacy, and 132 of 177 nursing schools teach apposite aspects. Professional journals have published many articles on this subject; this, for example, is the fourth Emergency Health Services Symposium presented by The Canadian Medical Association Journal.     

Bridging Multiple Worlds: How African American and Latino Youth in Academic Outreach Programs Navigate Math Pathways to College

Universities have launched outreach programs to enhance their ethnic diversity, yet little developmental research examines students' pathways to college. This study compares capital models (highlighting family background) with challenge models (highlighting students' challenges and resources) in predicting pathways to college. The Bridging Multiple Worlds Model frames this longitudinal study of 120 African American and Latino youth in outreach programs. We examined students' family backgrounds; challenges and resources across family, school, peer, and community worlds; and high school math pathways as predictors of college eligibility and enrollment. African American students more typically had U. S. born, college-educated parents, and Latino students, immigrant parents with high school education or less. Second, students saw parents as greater resources than teachers, siblings, and themselves; peers and teachers were their greatest challenges. Youth distinguished resources and challenges more by their source than form. Third, high school math and English grades rose and fell together, with early math grades predicting college eligibility. Five math pathways emerged: steady, slowly declining, rapidly declining, increasing, and "back on track" toward college, but pathways did not always predict college choices. Fourth, although family background predicted few outcomes, parents' and teachers' help and siblings' challenges predicted grades, eligibility, and admission to prestigious colleges. Findings highlight both capital and challenge models for science, policy, and programs involving diversity and equity.     

生物技术的未来和青年科学家—“第13届国际生物技术大会暨展览会”BP青年科学家和研究生奖

历经半个世纪, 由国际纯粹及应用化学联合会(IUPAC)创办的世界上目前规模最大、影响最广的“国际生物技术大会”(International Biotechnology Symposium-IBS)首次在中国举行。本届大会为第13届大会, 于2008年10月12~17日在中国北方著名旅游城市-大连召开, 会议有来自80多个国家和地区的2000多名代表参会。为了鼓励生物技术领域的青年科学家和研究生参会, 促进全球生物技术青年人才的培养, 本届大会在该会的历史上首次设立了“青年科学家及研究生奖”(YSSA), 由英国石油公司(BP)冠名赞助。来自世界各国的119名青年学者参与了该奖的竞争, 经过两轮初选、口头报告评选, 来自7个国家的20名40岁以下青年学者获奖。其中10人来自中国, 较好地展示了中国青年生物技术人才的研究水平。他们的研究课题涵盖了生物医药、能源、海洋、环境和生物信息学等领域, 反映了生物技术科学的前沿。     

Hey Students,That Can Is Full of Energy!

This effective technique has third- and fourth-grade students explore potential and kinetic energy and explain their discoveries. Students investigate what it takes to make a paint can roll forward and come right back, without seeing inside. Students experience science as an inquiry and develop their critical thinking skills. Students can also relate their exploratory experiences to real-life situations they experience at their school.     

BraX-Ray: An X-Ray of the Brazilian Computer Science Graduate Programs

Research productivity assessment is increasingly relevant for allocation of research funds. On one hand, this assessment is challenging because it involves both qualitative and quantitative analysis of several characteristics, most of them subjective in nature. On the other hand, current tools and academic social networks make bibliometric data web-available to everyone for free. Those tools, especially when combined with other data, are able to create a rich environment from which information on research productivity can be extracted. In this context, our work aims at characterizing the Brazilian Computer Science graduate programs and the relationship among themselves. We (i) present views of the programs from different perspectives, (ii) rank the programs according to each perspective and a combination of them, (iii) show correlation between assessment metrics, (iv) discuss how programs relate to another, and (v) infer aspects that boost programs'' research productivity. The results indicate that programs with a higher insertion in the coauthorship network topology also possess a higher research productivity between 2004 and 2009.