Physiological and biomechanical responses between seated and standing positions during distance‑based uphill time trials in elite cyclists     

Anthony Bouillod  Frederic Grappe 《Journal of sports sciences》2018,36(10):1173-1178

Cyclists regularly change from a seated to a standing position when the gradient increases during uphill cycling. The aim of this study was to analyse the physiological and biomechanical responses between seated and standing positions during distance-based uphill time trials in elite cyclists. Thirteen elite cyclists completed two testing sessions that included an incremental-specific cycling test on a cycle ergometer to determine VO_2max and three distance-based uphill time trials in the field to determine physiological and biomechanical variables. The change from seated to standing position did not influence physiological variables. However, power output was increased by 12.6% in standing position when compared with seated position, whereas speed was similar between the two positions. That involved a significant increase in mechanical cost and tangential force (F_tang) on the pedal (+19% and +22.4%, respectively) and a decrease (?8%) in the pedalling cadence. Additionally, cyclists spent 22.4% of their time in the standing position during the climbing time trials. Our findings showed that cyclists alternated between seated and standing positions in order to maintain a constant speed by adjusting the balance between pedalling cadence and F_tang.  相似文献   

The Library: Materials Center or Study Hall/     

Frederic R. Hartz 《College Teaching》2013,61(2):149-150

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Printing's Quincentenary     

Reinhold Frederic Gehner 《The Educational forum》2013,77(1):93-94

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Resource Constraints and Quality Public Library Service Delivery in Ghana     

Frederic Naazi-Ale Baada  Azerikatoa D. Ayoung  Stephen Bekoe  Fuseini Bawah Azindow 《International Information and Library Review》2020,52(1):10-31

Abstract

The availability and quantum of resources at the disposal of libraries greatly influence service delivery. This study seeks to assess the adequacy and effect of attenuating resources on the quality of public library services and the barriers to accessing sufficient resources for the provision of quality services. Based on a qualitative approach, the study interviewed 32 participants drawn from three regional libraries, using purposive and convenience sampling methods. Data were analyzed using interpretative techniques. The results showed that all three regional libraries were highly under resourced in terms of qualified personnel, physical resources, and current library materials which ultimately resulted in low patronage of the library facilities. A major concern was the absence of a National Library and Public Library Policy guiding the establishment of public libraries in Ghana. We strongly suggest that the new public library service bill should include a statutory formula for resource allocation to public libraries. Though our research concentrated on Ghana, the implications of the study are of great value to similar contexts.  相似文献   

Extracting Latent Moral Information from Text Narratives: Relevance,Challenges, and Solutions     

René Weber  J. Michael Mangus  Richard Huskey  Frederic R. Hopp  Ori Amir  Reid Swanson 《Communication methods and measures》2018,12(2-3):119-139

ABSTRACT

Moral Foundations Theory (MFT) and the Model of Intuitive Morality and Exemplars (MIME) contend that moral judgments are built on a universal set of basic moral intuitions. A large body of research has supported many of MFT’s and the MIME’s central hypotheses. Yet, an important prerequisite of this research—the ability to extract latent moral content represented in media stimuli with a reliable procedure—has not been systematically studied. In this article, we subject different extraction procedures to rigorous tests, underscore challenges by identifying a range of reliabilities, develop new reliability test and coding procedures employing computational methods, and provide solutions that maximize the reliability and validity of moral intuition extraction. In six content analytical studies, including a large crowd-based study, we demonstrate that: (1) traditional content analytical approaches lead to rather low reliabilities; (2) variation in coding reliabilities can be predicted by both text features and characteristics of the human coders; and (3) reliability is largely unaffected by the detail of coder training. We show that a coding task with simplified training and a coding technique that treats moral foundations as fast, spontaneous intuitions leads to acceptable inter-rater agreement, and potentially to more valid moral intuition extractions. While this study was motivated by issues related to MFT and MIME research, the methods and findings in this study have implications for extracting latent content from text narratives that go beyond moral information. Accordingly, we provide a tool for researchers interested in applying this new approach in their own work.  相似文献   

A Photograph of the Head of Cardinal Richelieu Taken Two Hundred and Fifty Years After Death     

Frederic Griffith 《Journal of the Medical Library Association》1906,4(2):184-185

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The Influence of Media Type on the Perceived Influence of Media Contents and on the Support to Restrict Controversial Messages     

Frederic Guerrero-Solé  Hibai López-González 《Communication Research Reports》2016,33(1):68-73

The aim of this study was to explore the intersection between Medium Theory (MT) and Third-Person Effect (TPE) and evaluate how the research on MT can further our knowledge of the TPE. The study has proven that the perceptual hypothesis of the TPE is confirmed in different media contents and across media types (TV and the Internet) and that media type has an impact on the magnitude of the TPE. In addition, media type can also be a requisite for TPE to occur. On the other hand, the study shows that media type can have an influence on people’s support to restrict controversial content, in particular, pornography.  相似文献   

First Year Medical Student Peer Nominations of Professionalism: A Methodological Detective Story about Making Sense of Non-Sense     

Trey C. Mullikin  Varun Shahi  Douglas Grbic  Wojciech Pawlina  Frederic W. Hafferty 《Anatomical sciences education》2019,12(1):20-31

This article explores the assessment of professionalism within a cohort of medical students during a sequential 13-week medical school histology and anatomy course. Across seven data points, students were asked to identify a professionalism role model from amongst their peers and to score Likert-structured rationales for their decision. Based on density scores, an initial social network analysis identified six peer-nomination “stars.” However, analysis of these stars revealed considerable variability and random-like “noise” in both the nomination and explanation data sets. Subsequent analyses of both data sets explored the possibility of underlying patterns in this noise using tests of reliability, principal components factor analysis, and fixed-effects regression analysis. These explorations revealed the presence of two dimensions (professional vs. supportive) in how students sought to explain their nomination decisions. Although data variability remained quite high, significantly less variability was present in the professional than in the supportive dimension, suggesting that academic helpfulness rationales are both empirically distinct and more mutable than rationales grounded in professionalism-related factors. In addition, data showed that the greater the stability in one's choice of a professionalism role model nomination over the T1–T7 data periods, the more stable one's reasons for that nomination—both for professionalism and supportive dimensions. Results indicate that while peer assessment of professionalism by first-year medical students may not be very reliable, students can differentiate between more personal and professional factors, even at this early stage in their professional development. Formal instruction within the pre-clinical curriculum should recognize and address this distinction. Anat Sci Educ. © 2018 American Association of Anatomists.  相似文献   

Two easy ways to cheat     

Joerg M. Meyer 《Teaching Statistics》2017,39(3):71-74

Stochastic independence is not an easy notion. Because it is part of the probability structure, it can have some surprising non‐properties, which is beneficial for teachers and students to see illustrated. Neither is the relationship to causal independence an easy one.  相似文献   

Original characteristics of a new cycle ergometer     

William M. Bertucci  Frederic Grappe  Samuel Crequy 《Sports Engineering》2011,13(4):171-179

The aim of this study was to describe and validate a new cycling ergometer with original characteristics that allow the measurement of biomechanical variables with position and crank inertial load used by the cyclist in field condition. The braking pedalling force, that permitted the simulation of the resistance to the cyclist in the field, is performed with a brushless electric motor. The validity and the reproducibility of the power output measurements were compared with the widely accepted SRM powermeter. The results indicate that taking into account a systematic error, the measurements are valid compared with the SRM, and the reproducibility of the power output measurements is similar to the SRM. In conclusion, this ergometer is the only one that allows at the same time for (1) valid and reproducible power output measurements at submaximal intensity, (2) utilisation of the personal bicycle of the cyclist, and (3) simulation of the inertial characteristics of the road cycling.  相似文献